JPS607182Y2 - Stencil sheet discharge device of rotary stencil printing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for discharging used stencil sheets from a rotary stencil printing device.

In Utility Application No. 54-179595 and U.S. Pat. A stencil paper removal structure has been proposed that automatically peels off the finished stencil sheet.

Furthermore, there is provided a stencil sheet discharge device that more easily and rationally processes used stencil sheets peeled off from the printing drum using these stencil paper removal structures.
Cape February 1, 1939, also filed by the same applicant as the applicant
This is proposed in Japanese Patent Application No. 55-17391 filed on the 5th.

A broad objective of the present invention is to further improve the stencil sheet discharging device according to the above-mentioned earlier patent application in terms of making the stencil sheet discharging operation smoother and more reliable.

In the stencil sheet discharging device according to the above-mentioned earlier patent application, after the base paper edge is placed on the bottom surface of the tray, the base paper main body, that is, the stencil sheet, is then placed on the edge in a neat S-shape. Ideally, they should be folded and overlap.

However, since the stencil sheet that makes up the base paper is a thin film, it is prone to wrinkles during the feeding process.On the other hand, the stencil sheet itself has considerable elasticity, so Once a wrinkled stencil sheet is prevented from freely moving forward in the feeding direction by a wall or the like, it tends to extend backward in the opposite direction to the feeding direction.

When the wrinkled part of the stencil sheet tries to extend backwards, this part sometimes causes the sheet to become vertical, which is made up of an upper rotating body and a lower rotating body that sandwich the stencil sheet from above and below and rotate in opposite directions. There is a risk that the stencil sheet may be caught up in the upper rotating body of the feeding device, impairing the smooth discharge of the stencil sheet.

SUMMARY OF THE INVENTION The detailed object of the present invention is to address the above-mentioned problems in previously proposed stencil sheet ejecting devices having the above-described configuration, and to provide a stencil sheet ejecting device that is further improved in this regard. It is said that

According to the present invention, the present invention provides a vertical sheet feeding device for conveying a stencil sheet peeled off from a printing drum of a rotary stencil printing device along the rotational direction of the surface of the printing drum, and the vertical sheet feeding device. and a floor surface extending in front of the barrier wall for blocking the movement of the stencil sheet discharged from the sheet vertical feeding device, the stencil sheet discharged from the vertical sheet feeding device is placed in a folded state on the floor surface. In a stencil sheet discharging device having a substantially groove-shaped receiving plate and a tray, the longitudinal sheet feeding devices are arranged substantially vertically side by side with each other, and the stencil sheet is sandwiched therebetween so as to move the sheet in opposite directions. Consists of an upper rotating body and a lower rotating body that rotate.
A sheet piece substantially stronger than a stencil sheet is provided above the upper rotating body, with the vicinity of the edge thereof being in contact with the circumferential surface of the upper rotating body. It is distantly related to the stencil sheet ejection device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a shoulder circumference plan view showing one embodiment of the stencil sheet discharging device according to the present invention, which is incorporated into a part of a rotary stencil printing device, and FIG. FIG. 3 is a cross-sectional view taken along the shoulder circumference according to FIG. 2, and FIG.

In these figures, 1 is a printing drum, and a drive mechanism 2
It is designed to be selectively driven in a predetermined manner.

A stencil sheet attachment part 3 is provided on a part of the periphery of the printing drum 1, and a pin 4 or the like is provided in the stencil sheet attachment part for attaching the stencil sheet.

A stencil sheet 5 is attached to the surface of the printing drum 1.

In this case, the stencil sheet 5 is provided at one end with an ear part 6 made of paper material that is thicker than the stencil part of the stencil sheet and relatively strong, and the retaining hole 7 formed in the ear part allows the stencil sheet to The attachment is such that it is removably engaged with the pin 4.

The stencil portion 8 of the stencil sheet 5 is kept attached to the circumferential surface of the printing drum 1 by the adhesive force of the printing ink.

Several grooves 9 are formed in the stencil sheet mounting portion 3 and extend along the rotational direction of the circumferential surface of the printing drum.

Several claws 10 for peeling off stencil sheets are provided close to the circumferential surface of the printing drum 1.

These pawls are held by a rotating shaft 11, and are tilted around the axis of the rotating shaft by rotating the rotating shaft.

The rotation shaft 11 is driven in the direction of rotation by the armature 14 of the solenoid 13 via the link 12, and accordingly, the tip of the claw 10 is attached to the pin 4 as shown in FIG. It rotates between a position where it is out of the movement trajectory and does not interfere with the rotation of the printing drum 1, and a position where it enters the groove 9 and separates the stencil sheet ear part 6 from the stencil sheet attachment part 3 as the printing drum 1 rotates. It is now possible to do so.

Rotating shafts 15 and 1 are located near the tip of the claw 10.
6, and a longitudinal sheet feeding device configured as a scissor o-wheel device consisting of gears 17 and 18 carried by these rotating shafts and meshing with each other.

Of these, the shaft 15 is selectively driven in the direction of the arrow shown in FIG. 2 by the drive device 2 via a sprocket wheel 19 and an endless chain 20 attached to one end thereof.

In this case, the gear 18 and the shaft 16 carrying it are the gear 1
8 meshes with gear 17 to be driven in a passive manner.

The device consisting of the pawl 10, gears 17, 18, etc. constitutes a vertical sheet feeding device that peels off the used stencil sheet from the printing drum 1 and conveys it along the rotational direction of the circumferential surface of the printing drum. Such a sheet peeling and feeding device is proposed in the above-mentioned Japanese Utility Model Application No. 179595/1982 and Japanese Utility Model Application No. 179596/1983.

Viewed along the sheet feeding direction by the sheet peeling and vertical feeding device, there is a barrier wall 22 at the rear of the sheet vertical feeding device that blocks the movement of the stencil sheet discharged from the sheet vertical feeding device, and a barrier wall 22 extending in front of the barrier wall 22 that blocks the movement of the stencil sheet discharged from the sheet vertical feeding device. A substantially channel-shaped receptacle having a floor surface 23 and a receptacle 24 is provided.

It is peeled off from the printing drum by the pawl 10 and the gear 1
The edge portion 6 is moved by the sheet vertical feeding device constituted by
The stencil sheet 5 is sent as the leading edge in the advancing direction.
This receiver is received within the pan 24 in a folded manner as will be explained in more detail below.

One end 25 of the groove-shaped receiver plate 24 is connected to a waste passage 26 extending downward.

Opposite the lower end of the waste passage (not shown in the figure), a suitable box or bag is placed with its opening facing the waste passage. You will receive a pre-finished stencil sheet.

Adjacent to the one end 25 of the tray 24, the receiver is provided with a scissor roll device consisting of rolls 27 and 28.

In the illustrated embodiment, the roll 27 is a cylindrical roll having a number of protrusions formed by cutting a number of grooves in its surface, whereas the roll 28 has a number of protrusions formed by circumferential grooves. The structure includes tread sections spaced apart from each other.

The roll 27 has a sprocket wheel 30 provided at one end of its shaft 29, an endless chain 31, and a sprocket wheel 3.
2, rotating shaft 33, sprocket wheel 34, endless chain 3
5. The roll 28 is selectively rotated by being driven by an electric motor 37 via a sprocket wheel 36, and accordingly, the roll 28 is provided at the other end of the shaft 29 of the roll 27. Gear 38 and roll 2
A gear 40 that is provided at one end of the shaft 39 of 8 and meshes with the gear 38.
(as seen in FIG. 1, the gear 38 is arranged under the gear 40), and the stencil sheet to be discarded is sandwiched between the rolls 27 and 28, as will be explained later. As seen in FIG. 1, it is configured to feed from the top to the bottom.

The shaft 33 driven by the electric motor 37 is further provided with a pair of sprocket wheels 41 .

Correspondingly, another rotating shaft 42 is provided below the floor surface 23, and a pair of sprocket wheels 43 are provided on the rotating shaft.

A pair of endless chains 44 is stretched between these sprocket wheels 41 and 43.

A claw 45 is attached to each of these endless chains, and along the movement path of the claw 45 as the endless chain 44 rotates, a slit is formed in the plate material constituting the floor surface 23 of the tray 24. 46 is cut off.

When the claw 45 moves along the upper span of the endless chain 44 as the endless chain 44 rotates, the tip of the claw 45 projects from the slit 46 onto the floor surface 23.

The side of the floor surface 23 remote from the barrier wall 22 is inclined so as to gradually rise toward the rotating shaft 15, and a notch 52 is cut out at the part where it interferes with the gear 17. It extends to a position that covers most of the rotating shaft 15 while avoiding interference with the gear 17.

The upper part of the tray 24 is covered by a lid 53.

The lid body 53 is attached to the barrier wall 22 by a hinge device 57 consisting of a bracket 54 fixed to the side of the lid body, a bracket 55 fixed to the side of the barrier wall 22, and a pin 56 for attaching both brackets. and is rotated around the hinge device in a counterclockwise direction as seen in FIG.
The receiver opens the upper part of the plate 24.

A point contact plate 58a on which minute square pyramidal projections 58 are formed is attached to the back surface of the lid 53.

A plurality of linear protrusions 59 are provided which extend across the point contact plate and further along the feeding direction of the stencil sheet by the gears 17 and 18.

As is clear from FIG. 2, the height at which the linear protrusion 59 projects downward from the lid body 53 is considerably larger than that of the square pyramid 58.

A bar 61 is further stretched between a pair of side plates 60 of the housing that supports the printing drum 1, rotating shaft 15, 16, etc.

A plurality of headed pins 62 are attached to the bar 61 at intervals along the bar 61.

A plate member 63 is provided between the heads of several headed pins and the bar 61 and is held so as to be freely movable and has a hole that relatively loosely engages with the shaft portion of the headed pin.

The plate member is made of a material such as polypropylene and is sized to a thickness that provides a substantially stronger sheet piece than the stencil sheet.

This plate member 63 is in contact with the circumferential surface of the gear 18 from above near one edge (the left edge in FIG. 2).

In connection with this, a sheet piece 64 made by bending a polyethylene terephthalate sheet material at an angle of about 40 degrees is attached to the back surface of the lid body 53 at one bent leg, and the other The tip of the leg resiliently contacts the edge of the plate member 63 at a position closer to the edge than the position where the plate member contacts the gear 18.

Due to the elastic pressing force exerted by such a sheet piece 64, the plate member 63 is subjected to a counterclockwise moment in FIG.
The other end floats above the bar 61, and the headed pin 62
It is in contact with the head of

Starting from the state shown in FIGS. 1 and 2, when the stencil sheet 5 is to be removed from the printing drum 1, a command to remove the stencil sheet is given on a control panel (not shown). The solenoid 13 is actuated to rotate the pawl 10 and bring its tip into a position where it engages the groove 9 in the stencil sheet mounting portion 3 of the printing drum 1, and at the same time, the printing drum 1 is rotationally driven and the gear is rotated. 1
7 and 18 are also rotationally driven.

As a result, the stencil sheet 5 mounted on the printing drum 1 begins to be peeled off from the printing drum 1 starting from its ears 6, as shown in FIG.

In this case, as shown in FIG.
When the stencil sheet is attached, it is disengaged from the pin 4 and at the same time it is caught between the gears 17 and 18, and it moves along the direction of rotation of the circumferential surface of the printing drum, that is, to the left in Fig. 4. It is also sent somewhat upward.

If this progresses further, the situation will be as shown in Figure 5,
The stencil sheet 5 is sent forward in such a manner that its ears 6 are guided along linear protrusions 59 provided on the lower surface of the lid 53.

As the stencil sheet is further fed by the gears 17 and 18, the ears 6 collide with the barrier wall 22 and fall onto the floor 23, as shown in FIG. The user is seated on the floor 23 at the position where the user is fully moved toward the side.

As the stencil sheet is further fed by the gears 17 and 18, the stencil sheet is gradually folded onto the ears 6 in an S-shape.

In the process of feeding the stencil sheet, even if the sticky stencil sheet containing ink comes into contact with the back surface of the lid 53, the stencil sheet only comes into contact with the linear protrusion 59 or the quadrangular pyramidal protrusion 58. Since these protrusions only have a small contact area with the stencil sheet, there is no possibility that the stencil sheet will adhere to the stencil sheet and prevent its feeding.

As the stencil sheet is being fed by the gears 17 and 18, wrinkles may occur in the stencil sheet as shown in FIG.

When such a situation occurs, the S-shaped folded portions of the stencil sheet have a relatively rigid structure due to the ink adhesive layer bonding between them, and the wrinkled portions are supported by the S-shaped folded portions. tends to extend towards the upper edge of gear 18.

If such elongation is allowed, there is a risk that the stencil sheet will follow the gear 18 at that portion and become entangled in the gear as it rotates further.

However, in this case, such a risk is eliminated because the plate member 63, which is substantially stronger than the stencil sheet, is held pressed against the upper edge of the gear 18 by the spring action of the sheet piece 64. This is ensured by the fact that the edges are arranged opposite the wrinkles of the stencil sheet that are about to elongate.

With the configuration described above, the stencil sheet is peeled off from the printing drum 1 by the claws 10 starting from the ears 6, and is fed between the gears 17 and 18 with the ears as the leading edge. Even when it is sent diagonally upward, that is, in a position where it collides with the back surface of the lid body 53, it adheres to the back surface of the lid body 53 to ensure that it is fed to the predetermined feeding position where it collided with the wall 22 and fell to the base of the wall 22. Even if wrinkles occur in the stencil sheet during the feeding process by the gears 17 and 18, there will be no problem such as the stencil sheet getting caught up in the gear 18. A reliable stencil sheet ejection operation is performed without any problems.

Although the present invention has been described above in detail with respect to one embodiment, it will be obvious to those skilled in the art that various modifications can be made to this embodiment within the scope of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main part of a structure in which an embodiment of the stencil sheet discharge device according to the present invention is incorporated into a rotary stencil printing device, and Fig. 2 is a plan view taken along the line 1 in Fig. 1. - Shoulder circumference sectional view according to ■, Figure 3 is taken along line III-III in Figure 2.
A schematic diagram showing the back side of the lid body according to Figures 4 to 7 are
4 is a view similar to FIG. 2 showing various operating states of the device shown in FIGS. 1... Printing drum, 2... Drive device,
3...Stencil sheet mounting part, 4...
・Stencil sheet installation is done with pin, 5... Stencil sheet, 6... Ear part, 7... Installation is done with hole, buttock... Stencil part, 9... ····groove,
10...Claw, 11 Rotation axis, 12...Link, 13...Solenoid, 14...
Armature, 15, 16... Rotating shaft, 17.
18... Gear, 19... Sprocket wheel, 20... Endless chain, 22...
Wall, 23... Floor, 24... Receiver is a plate, 25... Receiver is one end of the plate, 26...
Disposal passage, 27, 28...Low/L/, 29.
...Axis, 30 ... Sprocket wheel, 31 ... Endless chain, 32 ... Sprocket wheel, 33 ... Rotating shaft, 34 ...・・・
... Sprocket wheel, 35 ... Endless chain,
36...Sprocket wheel, 37...
...Electric motor, 38...Gear, 39...
Axis, 40... Gear, 41... Sprocket wheel, 42... Rotating shaft, 43...
... Sprocket wheel, 44 ... Endless chain,
45...Claw, 46...Groove, 52...
...notch, 53...lid body, 54.55...
...Bracket, 56...Zen, 57...
...Hinge, 58a... Point contact plate, 58...
... Quadrilateral pyramidal projection, 59 ... Linear projection, 6
0...Side plate, 61...Bar 62...
...headed pin, 63... plate member, 64.
...Sheet piece.

Claims (1)

[Scope of utility model registration request] A vertical sheet feeding device that conveys a stencil sheet peeled off from a printing drum of a rotary stencil printing device along the rotating direction of the circumferential surface of the printing drum, and a vertical sheet feeding device that transports the stencil sheet that is discharged from the vertical sheet feeding device. A substantially groove-shaped receiver has a barrier wall for blocking and a floor surface extending in front of the barrier wall, and receives the stencil sheet discharged from the vertical sheet feeding device in a folded state on the floor surface. In the stencil sheet discharging device having a tray, the sheet vertical feeding device has an upper rotating body and a lower rotating body that are arranged substantially vertically in line with each other and rotate in opposite directions with the stencil sheet sandwiched between them. A sheet piece substantially stronger than a stencil sheet is provided above the upper rotating body, with the vicinity of its edge abutting the circumferential surface of the upper rotating body. A stencil sheet discharge device featuring: