JPH0540235U - Paper feeder for newspaper advertising collator - Google Patents

Abstract

(57) [Summary] [Purpose] In a paper feeding device of a newspaper advertising collator that separates and feeds sheets one by one from a sheet bundle, when feeding a duster, powder to a paper feeding roller is fed. Can be suppressed and the occurrence of jump feed can be avoided. [Structure] An inclined groove is formed on the peripheral surface of the sheet feeding roller 10 at an angle of 20 to 45 ° with respect to a direction parallel to the central axis of the sheet feeding roller. Further, a leaf spring 13 is provided for urging the sheet passing through the leading end portion and entering the separating portion toward the peripheral surface of the sheet feeding roller 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sheet feeding device of a newspaper advertisement collator that separates and feeds sheets (leaflets) one by one from a sheet bundle configured by bundling a plurality of leaflets, and in particular, transfer of undried ink and sheets. The present invention relates to a paper feeding device of a newspaper advertising collator suitable for feeding so-called powdered leaflets, which are dusted for the purpose of preventing sticking between them.

[0002]

[Prior Art]

 FIG. 4 is a plan view showing a conventional friction feed type paper feeder used in a newspaper advertisement collator. In a newspaper advertising collator, a plurality of paper feeding devices are arranged in the height direction.

The paper feed tray 21 can swing within a limited range about a fulcrum 21a. Normally, the inclination angle of the paper feed tray 21 is set to about 30 to 35 ° with respect to the horizontal plane. A paper feed plate 22 is arranged on the extension of the tray 21.

A paper feed roller shaft (not shown) that supports the paper feed roller 1 and a driven roller shaft (not shown) that supports the driven roller 23 are both supported by a swing bracket (not shown). A one-way clutch (not shown) is interposed between the paper feed roller 1 and the paper feed roller shaft. The paper feed roller shaft and the driven roller shaft are connected by a timing belt (not shown).

Below the sheet feeding roller 1, a separating plate unit 20 including a separating plate 2 and the like is provided. Further, on the downstream side of the sheet feeding roller 1 in the sheet feeding direction, a pair of conveying rollers 24a, 24b are provided facing each other in the vertical direction. Further, a guide plate 22a is arranged between the separating plate 2 and the transport rollers 24a and 24b. Furthermore, a sensor 25 is provided on the downstream side of the transport rollers 24a and 24b to detect the presence / absence of a sheet at the position indicated by the broken line.

FIG. 5 is a perspective view showing the separating board unit 20.

The separating plate unit 20 is composed of a frame 26, a first rocking plate 27, a second rocking plate 3, and the like. The mount 26 is a U-shaped member and is fixed to the device frame or the like. The first rocking plate 27 is also a U-shaped member, and a plate sandwiched between two side plates arranged in parallel with each other is provided with an engaging projection 27b. The first swing plate 27 is swingably supported by the mount 26 by a shaft 26a.

The second rocking plate 3 is provided with a separating plate 2 and a sliding plate 3 a on the upper surface thereof. A hemispherical support 4 is provided below the separation plate 2 of the second swing plate 3. The second swing plate 3 is swingably supported by the first swing plate 27 by a shaft 27a.

A slide plate 28 is arranged on the protrusion 27 b side of the first swing plate 27. The slide plate 28 is movable in the direction indicated by the arrow A in FIG. 5, and is provided with an elongated hole 28a inclined with respect to the moving direction. Then, the projection 27b of the first swing plate 27 is engaged with the elongated hole 28a. The movement of the slide plate 28 is performed via a link mechanism.

An inclined plate 5 is arranged below the support body 4. The inclined plate 5 is movable in the direction indicated by the arrow B in FIG. 5 and has an inclined surface inclined with respect to this moving direction. Therefore, the separating plate 2 moves up and down as the inclined plate 5 moves. The movement of the inclined plate 5 is performed via a link mechanism.

By moving the slide plate 28 and the inclined plate 5, the angle of the separation plate 2 and the pressing force (separation pressure) of the separation plate 2 against the sheet feeding roller 1 can be individually adjusted.

Next, the operation of the sheet feeding device configured as described above will be described.

First, the driven roller 23 is retracted above the paper feed tray 21, and the sheet bundle is placed on the paper feed tray 21. Then, the sheet bundle slides down on the paper feed tray 21, and the leading end thereof abuts on the separating plate 2. After that, the swing bracket is swung to bring the driven roller 23 into contact with the sheet.

Next, when the paper feed roller 1 and the driven roller 23 start to rotate, the driven roller 23 that is driven and rotated by the paper feed roller 1 presses the sheet bundle with a predetermined paper feed pressure to press the paper feed roller 1. At the same time, the topmost sheet in the sheet bundle is sent out. This sheet passes between the paper feed roller 1 and the separating plate 2 and moves between the transport rollers 24a and 24b. In this case, when the lower sheet and the uppermost sheet come into close contact with the uppermost sheet and reach between the separating plate 2 and the sheet feeding roller 1, the frictional force and the shear force between the sheet feeding roller 1 and the sheet. Since the frictional force between the sheet and the separating plate 2 is larger than the frictional force between the sheets, the conveying force of the sheet feeding roller 1 is not transmitted to the lower sheet, and the lower sheet is separated. Stop at the position of plate 2. Therefore, the sheets are supplied one by one to the transport rollers 24a and 24b.

Next, the sheet feeding roller 1 sends out the sheet separated into one sheet toward the conveying rollers 24a and 24b. Then, when the sensor 25 on the exit side of the transport rollers 24a and 24b detects the leading edge of the sheet, the driving device stops the driving of the sheet feeding roller 2. After that, the sheet is sent out by the transport rollers 24a and 24b. At this time, no driving force is applied to the sheet feeding roller 1, but since a one-way clutch is provided between the sheet feeding roller 1 and the sheet feeding roller shaft, the sheet is not fed to the sheet feeding roller 1. Moves between the separating board 2 without resistance.

Next, when the sensor 25 detects the trailing edge of the sheet, the paper feed roller 1 restarts rotation and feeds the next sheet. In this way, the sheets are fed one by one from the sheet bundle.

By the way, in order to avoid inconveniences such as transfer of undried ink and sticking of sheets to each other, dust may be sprinkled on the leaflets after printing. Such leaflets are called powdered leaflets. If this duster is fed by a friction feed type paper feeder, the powder will gradually accumulate on the surface of the paper feed roller, and eventually the paper feed roller will slip and the sheet cannot be fed. The so-called blank feed occurs.

For example, when feeding a duster using a general paper feeding roller, the sheet feeding limit number is about 200, and even when a grooved roller having a groove on the peripheral surface is used, The number of sheets in the paper limit is about several hundred. Therefore, it is necessary to stop the apparatus and clean the paper feed roller every time a predetermined number of sheets are fed.

In order to prevent idling during dust feeding, a device has been developed that automatically cleans the feeding roller by rolling the cleaning roller equipped with a brush such as sponge or felt to the feeding roller. Has been done. Further, there is also a device that uses a paper feed roller having a sand paper disposed on the peripheral surface and sets the separation pressure for the duster to be higher than in the case of the normal leaflet to suppress the idle feeding during the duster feeding.

[0020]

[Problems to be solved by the device]

 However, in the device in which the cleaning roller is brought into contact with the paper feeding roller, the cleaning effect is lost when the powder accumulates on the cleaning roller, and therefore the cleaning roller needs to be regularly cleaned or replaced. In addition, there is a risk that the paper feed roller may be damaged by a brush.

On the other hand, in a device that uses a paper feed roller having a sandpaper disposed on its peripheral surface, there is a risk that the paper feed roller may scratch the leaflets. Further, although this device can suppress the idle feed, it cannot completely prevent it. Furthermore, when feeding a leaflet other than the duster, it is necessary to replace the paper feed roller and readjust the paper feed pressure, which is complicated.

The present invention has been made in view of the above problems, and does not require complicated operations such as cleaning and replacement of the paper feed roller, and an operation of separating and feeding the dusters one by one. An object of the present invention is to provide a paper feeding device for a newspaper advertising collator that can perform stable operation for a long time.

[0023]

[Means for Solving the Problems]

 A sheet feeding device of a newspaper advertisement collating machine according to the present invention is a sheet feeding device of a newspaper advertisement collating machine which separates and conveys sheets one by one from a sheet bundle, and includes a separating member and a separating member. A sheet feeding roller for separating and feeding the sheets one by one between them, and a plate-like roller for urging the sheet entering between the sheet feeding roller and the separating member toward the peripheral surface of the sheet feeding roller. A biasing member, and an inclined groove forming an angle of 20 to 45 ° with respect to a direction parallel to the central axis of the sheet feeding roller is provided on the peripheral surface of the sheet feeding roller. ..

[0024]

[Action]

 In the present invention, a plurality of inclined grooves are formed on the peripheral surface of the sheet feeding roller at an angle of 20 to 45 ° with respect to the direction parallel to the central axis of the sheet feeding roller. The part between the inclined grooves on the peripheral surface of the paper feed roller (hereinafter referred to as the convex part) is deformed at the edge when the sheet is separated from the separating member, and returns to the original shape when separated from the separating member. To do. Due to this shape deformation, it is possible to prevent the powder dust from adhering to the surface of the convex portion.

Further, in the present invention, the sheet-like urging member urges the sheet entering between the sheet feeding roller and the separating member to the sheet feeding roller provided with the inclined groove. As a result, the feeding force of the sheet feeding roller with respect to the sheet can be increased, and the powder adhering to the sheet can be squeezed off by the peripheral surface of the sheet feeding roller and the urging member.

In this case, as shown in FIGS. 6A and 6B, when the groove provided on the peripheral surface of the sheet feeding roller 30a is parallel to the central axis of the sheet feeding roller 30a, Since the plate-shaped urging member 31 vibrates with the rotation of the sheet feeding roller 30 a, the vibration can remove the powder adhering to the roller 30 a, but the vibration of the urging member 31 causes the edge portion of the sheet 32 to vibrate. Enters into the groove of the roller 30a and the edge of the sheet 32 buckles. On the other hand, as shown in FIGS. 7 (a) and 7 (b), when a groove inclined to the direction parallel to the central axis of the sheet feeding roller 30b is provided on the peripheral surface of the sheet feeding roller 30b, the urging force is increased. It is possible to prevent the buckling of the tip portion of the seat 32 without vibrating the member 31. Therefore, it is necessary that the groove provided on the peripheral surface of the paper feed roller be inclined with respect to the direction parallel to the central axis of the paper feed roller.

However, when the angle of the groove with respect to the direction parallel to the central axis of the sheet feeding roller is less than 20 °, the edge of the sheet enters the groove, the leading edge of the sheet buckles, and the conveyance of the sheet is hindered. There is a risk that On the other hand, when the angle of the groove with respect to the direction parallel to the central axis of the sheet feeding roller exceeds 45 °, the coefficient of friction of the sheet feeding roller with respect to the sheet decreases, and sheet feeding is hindered. Therefore, it is necessary that the groove provided on the peripheral surface of the paper feed roller forms an angle of 20 to 45 ° with respect to the direction parallel to the central axis of the paper feed roller.

[0028]

【Example】

 Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a plan view showing a sheet feeding device of a newspaper advertisement collating machine according to an embodiment of the present invention, and FIG. 2 is an enlarged view showing a sheet separating section which is also formed by a sheet separating plate and sheet feeding rollers. ..

A leaf spring 13 wider than the sheet feeding roller 10 is provided on the upstream side of the sheet feeding roller 10 with respect to the sheet flow direction. The leaf spring 13 is swingable around a shaft 14 so that a sheet passing between the sheet feed roller 10 and the leaf spring 13 and entering the loosening portion is fed by a coil spring 15 to the peripheral surface of the sheet feed roller 10. Is urged towards. The tip of the leaf spring 13 is bent, and the bent portion serves as the stopper portion 13a.

The oscillating plate 12 is made of resin having a small surface friction coefficient, and the separating plate 11 having a large surface friction coefficient is disposed on the upper surface thereof. Further, an inclined surface 12a is provided on the upstream side of the separating plate 11 in the sheet flow direction, and a step is provided at a boundary portion between the inclined surface 12a and the separating plate 11.

FIG. 3 is a perspective view showing the paper feed roller 10. The paper feed roller 10 is formed by fitting an elastic roller 10b made of silicon rubber or the like to a resin shaft 10a. A one-way clutch 18 is provided inside the shaft 10a. Further, an inclined groove 17 is provided on the peripheral surface of the elastic roller 10b. The inclined groove 17 is set to form an angle of 20 to 45 ° with respect to the direction parallel to the central axis of the paper feed roller 10. In general, the angle of the inclined groove 17 with respect to the direction parallel to the central axis of the paper feed roller may be about 30 °.

Next, the operation of the sheet feeding device according to the present embodiment will be described.

First, the sheet bundle 16 is placed on a paper feed tray (not shown). Then, the sheet bundle 16 slides down on the paper feed tray, and its tip end contacts the stopper portion 13 a of the leaf spring 13. Next, when the sheet feeding roller 10 starts to rotate, a driven roller (not shown) that is rotated by the sheet feeding roller 10 sends out the uppermost sheet of the sheet bundle 16, and the sheet is fed by the leaf spring 13. Push it down to pass through the tip of the leaf spring 13. Then, when the front edge of the seat reaches the inclined surface 12a of the rocking plate 12, the seat advances along the inclined surface 12a. In this case, even if a plurality of sheets enter between the paper feed roller 10 and the leaf spring 13 at the same time, the lower sheet is prevented from advancing due to the bias of the leaf spring 13 and its leading end is inclined. Even when it abuts on the surface 12a, the driving force is not supplied from the sheet feeding roller 10 and the progress is hindered. Therefore, it is unlikely that a plurality of sheets will be simultaneously fed between the paper feed roller 10 and the separating plate 11. Even if a plurality of sheets are simultaneously fed between the sheet feeding roller 10 and the separating plate 11, only the uppermost sheet is 1 due to the separating action of the sheet feeding roller 10 and the separating plate 11. It is separated into sheets and sent out to the conveying rollers 24a, 24b side.

By the way, when the sheet is dusted, when the duster passes between the tip of the leaf spring 13 and the feed roller 10, the peripheral surface of the feed roller 10 and the tip of the leaf spring 13 Squeezed by, the powder adhering to the surface of the duster is squeezed off. Further, when the sheet feeding roller 10 slides on the separating plate 11, the edge portion of the portion between the grooves of the sheet feeding roller 10 (immediately, a convex portion) is deformed, and when passing through the separating plate 11, the original shape is restored. Restore. Due to the shape deformation at this time, it is possible to prevent the next sheet from being conveyed while the powder adheres to the convex surface.

Therefore, in the sheet feeding device according to the present embodiment, when feeding the duster, it is possible to avoid the occurrence of the idle feeding due to the accumulation of the dust on the peripheral surface of the roller 10. Therefore, complicated work such as roll replacement or frequent roll cleaning is unnecessary. Also, when changing the sheet to be fed from the duster to the normal leafer, it is not necessary to readjust the separation pressure. Furthermore, since the peripheral surface of the paper feed roller is made of silicone rubber or the like, there is no risk of scratching the leaflet.

[0037]

[Effect of the device]

 As described above, in the present invention, the inclined groove is provided on the peripheral surface of the sheet feeding roller, and the plate-shaped urging member for urging the sheet toward the peripheral surface of the sheet feeding roller is provided. Therefore, even when feeding the duster, it is possible to prevent the dust from adhering to the peripheral surface of the feed roller, and to prevent the idle feeding for a long time. In addition, even when a normal leaflet is fed after feeding the leaflet, there is no need to readjust the loosening pressure, and there is no fear that the leaflet will be flawed.

[Brief description of drawings]

FIG. 1 is a plan view showing a paper feeding device of a newspaper advertising collator according to an embodiment of the present invention.

FIG. 2 is an enlarged view showing the separation section of the same.

FIG. 3 is a perspective view showing the sheet feeding roller of the same.

FIG. 4 is a plan view showing a paper feeding device of a conventional newspaper advertising collator.

FIG. 5 is a perspective view showing the separation board unit of the same.

FIG. 6A is a plan view showing an action and a problem of a sheet feeding roller having a groove provided on a peripheral surface in parallel with a central axis thereof, and FIG. 6B is a side view thereof.

FIG. 7A is a plan view showing the action of a sheet feeding roller having a groove inclined on the peripheral surface with respect to its central axis, and FIG. 7B is a side view thereof.

[Explanation of symbols]

 1, 10, 30a, 30b; Paper feed rollers 2, 11; Separation plates 3, 4, 12; Swing plates 13, 31; Leaf springs 15; Coil springs 16; Sheet bundles 17; Inclined grooves 21; Paper feed trays 23 Driven rollers 24a, 24b; transport rollers

Claims (1)

[Scope of utility model registration request] 1. A sheet feeding device of a newspaper advertising collator that separates and conveys sheets one by one from a sheet bundle, and separates the sheets one by one between a separating member and the separating member. A sheet feeding roller for feeding the sheet, and a plate-like urging member for urging a sheet entering between the sheet feeding roller and the separating member toward the peripheral surface of the sheet feeding roller. A sheet feeding device of a newspaper ad gathering machine, characterized in that an inclined groove forming an angle of 20 to 45 ° with respect to a direction parallel to the central axis of the sheet feeding roller is provided on the peripheral surface of the roller.