JPS6228758B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stencil printing machine, and particularly to a plate cylinder support structure of a single-cylinder stencil printing machine.

It includes a porous cylindrical plate cylinder having a stencil sheet attached to its inner circumferential surface and rotating around its own central axis, and printing ink is supplied to the inner circumferential surface of the plate cylinder by an ink supply device, and the plate cylinder and Conventionally, a single-cylinder printing machine is configured to transfer printing ink that has passed through perforations of a stencil paper mounted on the outer circumferential surface of the stencil paper onto a printing medium such as printing paper that is fed by contacting the surface of the stencil paper. known from.

In the above-mentioned single-cylinder stencil printing machine, the cylindrical plate cylinder has conventionally been directly rotatably supported by the machine body, and for this reason, the cylindrical plate cylinder cannot be used for changing the printing ink color or for maintenance. Replacement requires relatively large-scale disassembly work, which is difficult for general users to perform, and there is an inconvenience in that general users cannot freely carry out these tasks.

The present invention provides a stencil printing machine in which the cylindrical plate cylinder can be easily attached and detached from the machine body without requiring large-scale disassembly work, and the cylindrical plate cylinder can be easily replaced even by general users. The purpose of this invention is to provide a plate cylinder support structure.

According to the present invention, the present invention includes a frame that rotatably supports a cylindrical plate cylinder, and a frame that is provided on a machine body and extends in the axial direction of the cylindrical plate cylinder and that supports the frame in a removable manner. and guiding and holding means for guiding and holding the cylindrical plate cylinder movably in the axial direction of the cylindrical plate cylinder between a printing position inside the machine and a draw-out position outside the machine. This is achieved by the torso support structure.

According to this configuration, the cylindrical plate cylinder can be moved along the axial direction of the frame together with the frame between the printing position inside the machine and the drawer position outside the machine while being guided and held by the guide holding means. When the frame is removed from the guide holding means at the drawn-out position, the cylindrical plate cylinder is removed together with the frame from the body of the stencil printing apparatus, and the frame is engaged with the guide holding means, and the cylindrical plate cylinder is removed from the guide holding means. By pushing the frame into the machine with the plate cylinder supported by the guide holding means via the frame,
The cylindrical plate cylinder moves along its own axis to ensure that it is positioned at the printing position within the machine. As described above, according to the plate cylinder support structure according to the present invention, the installation and removal of the plate cylinder can be easily and quickly performed without requiring disassembly work that requires skill using tools, and thereby the plate cylinder can be replaced. The work can now be performed easily even by general users, and if multiple plate cylinders are prepared, printing in different colors or printing in multiple colors can be easily performed on one printing machine. You will get it.

In the following, the invention will be explained in detail by way of example embodiments with reference to the accompanying drawings.

FIG. 1 is a side view showing, partially in section, the main parts of a stencil printing apparatus equipped with a plate cylinder support structure according to the present invention;
2 is an enlarged front view of the stencil printing apparatus shown in FIG. 1, and FIG. 3 is a plan sectional view of the plate cylinder device used in the plate cylinder support structure according to the present invention. In these figures, 1 indicates the body of the stencil printing device,
The body is attached to the slide bar 3 by the guide sleeve 2.
is supported so as to be movable horizontally in the left and right directions when viewed in FIG. 11. As clearly shown in FIG. 2, two slide bars 3 are provided parallel to each other, and a strip-shaped holder post 4 is attached to one end of each bar in a vertical position. The two holder posts 4 are integrally connected to each other by a connecting member 5 at their lower ends. Each holder post 4 has a support pin 6 for detachably supporting the plate cylinder device 10.
and 7 are installed. That is, the guide sleeve 2 and the slide bar 3 constitute a guide and holding means for the plate cylinder device 10.

Further, at the other end of each slide bar 3, a stopper 8 is provided to prevent the slide bar from slipping out of the guide sleeve 2, as shown in FIG.

The plate cylinder device 10 includes a cylindrical plate cylinder 11. The plate cylinder 11 includes a cylindrical body 12 having a porous circumferential portion and open at both ends, an annular guide ring 13 attached to one end of the cylindrical body 12, and a cylindrical body 12.
It consists of an end cover 14 attached to the other end, and a stencil sheet can be attached to the outer peripheral surface of the cylindrical body 12.

Inside the plate cylinder 11 are two band-like frame bars 1.
5 are provided parallel to each other in the axial direction, and each of these two frame bars 15 connects to the plate cylinder 11 at one end.
The projecting ends are connected to the front frame 1 by connecting pieces 16, respectively.
It is connected to 7. The front frame 17 is
It has a circular opening 17a for receiving the plate cylinder 11, and is loosely fitted to the outer peripheral portion of the plate cylinder 11 near the one end.
A plurality of guide rollers 18, three in this embodiment, are each rotatably attached to the front frame 17, and each of these guide rollers slides on the outer peripheral surface of the guide ring 13, and rotates the plate cylinder 11. It is rotatably supported from its outer periphery.

As best shown in FIG. 3, the connecting pieces 16 each have a hook shape when viewed from above, and the connecting pieces cooperate with the one end of the frame bar 15 to receive a U-shaped holder post. 19.

The other end of the frame bar 15 is located near the other end of the plate cylinder 11, as shown in FIG. 3, and these ends are connected to each other by a connecting plate 20. The connecting plate 20 rotatably supports the plate cylinder support shaft 23 by means of a bearing member 22. The plate cylinder support shaft 23 is connected to the hub portion 14a of the end cover 14 at its flange portion 24, and its tip protrudes to the outside of the end cover 14 through a center hole 14b provided in the hub portion 14a. That is,
The connecting plate 20 supports the other end of the plate cylinder 11 by a plate cylinder support shaft 23 so as to be rotatable about its central axis. Further, the plate cylinder support shaft 23 has an axial drive shaft receiving hole 25 and a keyway 26 opened at its tip.

The two frame bars 15 are connected to each other by a connecting plate 21 in the vicinity of the one end inside the plate cylinder 11. The connecting plate 21 and the connecting plate 20 are provided parallel to each other in the axial direction of the plate cylinder 11 and spaced apart from each other. is rotatably mounted around the That is, the ink supply roller 27 is rotatably supported by the connecting plates 20 and 21 by central shafts 28 provided at both ends thereof, and is in contact with the inner circumferential surface of the plate cylinder 1 at its outer circumference. As shown in FIG. 3, a pulley 29 is attached to the central shaft 28 on the side of the connecting plate 20, and as shown more clearly in FIG. An endless power transmission belt 31 is stretched between the pulley 30 attached to the . As a result, the ink supply roller 27 rotates in synchronization with the rotation of the plate cylinder 11 in the same direction as the rotation direction of the plate cylinder, that is, in the counterclockwise direction as viewed in FIG.

Further, a doctor rod 32 is fixed between the connecting plates 20 and 21 along the generatrix of the ink supply roller 27 at a predetermined relatively small distance from the outer peripheral surface of the ink supply roller 27. Doctor Rod 32
The right side as seen in FIG. 2, that is, the ink supply roller 27
An ink supply pipe 33 is disposed at the rear of the ink supply roller 27 in the rotational direction from the opposite part of the ink supply roller 27 and the doctor rod 32.
7, and this printing ink forms an ink reservoir A in a wedge-shaped space defined by the outer peripheral surface of the ink supply roller 27 and the outer peripheral surface of the doctor rod 32. There is.
As the ink supply roller 27 rotates, the printing ink in the ink reservoir A is transferred between the ink supply roller 27 and the doctor rod 32.
The printing ink passes through the gap between the ink supply roller 27 and is metered at that time to form a printing ink layer of uniform thickness on the outer peripheral surface of the ink supply roller 27. This printing ink layer is supplied to the inner peripheral surface of the plate cylinder 11 as the ink supply roller 27 rotates, and is used for printing.

A connecting body of an ink tube support 34 and an ink pump support member 35 is placed on the connection plates 20 and 21. Ink tube support stand 34
An ink outlet holding plate 36 for holding the ink outlet of the ink tube C supported by the support base is provided at one end of the ink outlet holding plate 36, and a portion near this end and the entire ink pump support member plate 35 are attached to the plate cylinder. 1
It is located within 1. Ink pump support member 35
supports an ink pump 37 and an electric motor 38 that drives the ink pump. Ink pump 37
has its suction port 39 at a position that directly receives the ink outlet of the ink tube C supported on the ink tube support 34, and its discharge port 40 is connected to the ink supply pipe 33 by an ink supply hose 41. It is connected.

Further, an ink sensor 43 is provided within the plate cylinder 11 and is supported from the frame bar 15 by a holder 42 . This ink sensor 43 includes a tactile-like detection electrode 44 provided facing the ink reservoir A, and detects the amount of ink in the ink reservoir A in a capacitive manner, and controls the motor 38 based on the detection result. It is designed to control the operation. If a detailed explanation of the ink sensor 43 is desired, please refer to Japanese Patent Application No. 161418/1983 (Japanese Patent Application Laid-Open No. 62520/1982).

The plate cylinder device 10 has a holder post 4 in the receiving part 19.
By receiving the upper end, the lower bottom surface of the connecting piece 16 engages with the support pin 6, and the front surface of the front frame 17 engages with the distal end surface (the right end as seen in FIG. 1) of the support pin 7, thereby opening the holder. It is held in a horizontal position from the post 4 as shown in Fig. 1, and in this holding state, as shown in Fig. 1, the printing position inside the machine and the left side from the printing position in the direction of its own axis in the figure. It is possible to move between the pull-out position outside the machine and the pull-out position outside the machine.

When the plate cylinder device 10 is in the printing position,
The drive shaft 45 attached to the machine frame 1 enters and engages the drive shaft receiving hole 25, and the drive shaft 2 is inserted into the keyway 26.
By engaging the engagement pin 46 of No. 5, the plate cylinder support shaft 23 is connected to the drive shaft 45 in a rotational power transmission relationship. A drive gear 47 is attached to the drive shaft 45, and the drive gear 47 is rotationally driven by an electric motor (not shown) via a drive gear train (not shown). The drive shaft 45 is tapered to facilitate engagement with the receiving hole 25, as shown in FIG.

Further, a connector 50 for electrical connection is attached to the front frame 17, and this electrical connector 50 is provided on the machine frame 1 and opposed to it when the plate cylinder device 10 is brought to the printing position. It is connected to an electrical connector 51 to conductively connect the electric motor 38 and ink sensor 43 in the plate cylinder 11 to a control device (not shown) provided in the machine frame 1.

Further, the machine frame 1 rotatably supports a press roller 49 via a bracket 48, and the press roller 49 is adapted to come into pressure contact with the outer peripheral surface of the plate cylinder 11.

With the configuration described above, when removing the plate cylinder device 10 in the printing position from the stencil printing machine, grasp the holder post 4 or an appropriate part of the plate cylinder device 10 by hand and slide the slide bar 3 from the guide sleeve 2. By pulling out the plate cylinder device 10 in the guided state toward the front, that is, to the left as seen in FIG. 1, the entire plate cylinder device 10 together with the holder post 4 is brought to a pulled-out position outside the machine. When the plate cylinder device 10 is lifted upward in this drawn-out position, the receiving portion 19 is pulled out from the holder post 4, and the plate cylinder device 1
0 is removed from the machine body 1 of the stencil printing machine.

When installing the plate cylinder device 10 that has been removed from the machine body 1 into a stencil printing machine, the plate cylinder device 10 is lowered from above the holder post 4 that has been pulled out to the drawn-out position as described above, and the holder is placed in the receiving section 19. The upper end of the post 4 is engaged, and the lower bottom surface of the connecting piece 16 is connected to the support pin 6.
and the front surface of the front frame 17 is engaged with the tip end surface of the support pin 7. As a result, the plate cylinder device 10 is supported by the holder post 4 in a substantially horizontal position at a pulled-out position outside the machine. In this state, the holder post 4 or an appropriate part of the plate cylinder device 10 is grasped by hand, and the plate cylinder device 10 is held in a state where the slide bar 3 is slidingly guided by the guide sleeve 2.
is pushed into the machine, that is, to the right as seen in FIG. When pushed in, the drive shaft 45 engages with the receiving hole 25, and as the plate cylinder device 10 is further moved toward the printing position, the pin 46 engages with the keyway 26, and the electrical connector 5
0 engages the electrical connector 51, so that when the plate cylinder device 10 is in the printing position, the support shaft 23 is connected to the drive shaft 45 in a rotational power transmission relationship, and the electrical connectors 50 and 51 are connected. Once completed, the electric motor 38 and ink sensor 43 are electrically connected to the control device. Further, at this time, a part of the outer peripheral surface of the plate cylinder device 10 comes into contact with the press roller 49 along one roller generatrix.

Although the present invention has been described in detail with respect to specific embodiments above, it will be appreciated by those skilled in the art that the present invention is not limited thereto and that various embodiments can be made within the scope of the present invention. It should be obvious.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a partial cross-section of the essential parts of an embodiment of a stencil printing machine incorporating a plate cylinder support structure according to the present invention, and FIG. 2 is a stencil printing machine shown in FIG. 1. FIG. 3 is an enlarged front view of the apparatus and a cross-sectional plan view of the plate cylinder apparatus used in the plate cylinder support structure according to the present invention. 1... Machine frame, 2... Guide sleeve, 3... Slide bar, 4... Holder post, 5... Connecting member, 6, 7... Support pin, 8... Stopper, 1
0... Plate cylinder device, 11... Plate cylinder, 12... Cylindrical body, 13... Guide ring, 14... End cover, 15... Frame bar, 16... Connection piece, 1
7...Front frame, 18...Guide roller, 19...Holder post receiving hole, 20, 21...
... Connection plate, 22 ... Bearing member, 23 ... Plate cylinder support shaft, 24 ... Flange section, 25 ... Drive shaft receiving hole, 26 ... Keyway, 27 ... Ink supply roller, 28 ... Center shaft , 29, 30...Pulley,
31... Endless electric belt, 32... Doctor rod, 33... Ink supply pipe, 34... Ink tube support stand, 35... Pump support member, 36
... Ink outlet holding plate, 37 ... Ink pump, 38 ... Electric motor, 39 ... Suction port, 40
... Projection port, 41 ... Ink supply tube, 42
...Bracket, 43...Ink sensor, 44...
...detection electrode, 45 ... drive shaft, 46 ... engagement pin, 47 ... drive gear, 48 ... bracket, 4
9... Press roller, 50, 51... Connector for electrical connection.

Claims (1)

[Claims] 1. A frame rotatably supporting the cylindrical plate cylinder, and a frame provided on the machine body extending in the axial direction of the cylindrical plate cylinder, supporting the frame removably, and carrying the cylindrical plate cylinder together with the frame inside the machine. A plate cylinder support structure for a stencil printing machine, comprising a guide and holding means for guiding and holding the cylindrical plate cylinder movably in the axial direction between a printing position and a drawer position outside the machine.