JPH0657451B2 - Roll cleaning device for tablet printing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a roll cleaning device for a tablet printing machine.

2. Description of the Related Art Conventional technology and its problems In a tablet printing machine, tablet powder or the like adheres to the surface of a transfer roll that transfers ink to the tablets held on a supply roll, so it is necessary to wash it regularly. Conventionally, an operator periodically stops printing and manually presses a cleaning material impregnated with a cleaning liquid onto the surface of a rotating transfer roll to clean it. There is a safety issue. Therefore, automation of roll cleaning is desired, but it has not been put into practical use because of the following problems. That is, in order to automate the roll cleaning of the printing machine, it is necessary to dispose a cleaning device having a mechanism for automatically pressing the cleaning material on the surface of the transfer roll in a limited space of the printing machine. Further, since there is a problem that the roll is contaminated by the dirty cleaning liquid after cleaning, it is necessary to frequently replace the cleaning material, which is troublesome to handle.

An object of the present invention is to provide a roll cleaning device for a tablet printing machine that solves the above problems.

Means for Solving the Problems A roll cleaning device for a tablet printing machine according to the present invention comprises a cleaning roll provided with a plurality of grooves on an outer peripheral surface thereof, the groove being divided into a plurality of convex portions in a circumferential direction, and a cleaning roll. Driving means for intermittently rotating the convex portion by one pitch or a plurality of pitches, a cleaning material wound along the convex portion of the outer peripheral surface of the cleaning roll and the groove, and a convex portion of the cleaning roll. A cleaning liquid supply means for supplying the cleaning liquid to the portion of the cleaning material along the outer peripheral surface is provided.

The drawings show a transfer roll (10) of a tablet printing machine and its cleaning device (1
1) is shown.

A plurality of annular grooves (12) are formed at equal intervals on the outer peripheral surface of the transfer roll (10), and the outer peripheral surfaces between and on both sides are ink transfer surfaces (10a). Although illustration is omitted,
The transfer roll (10) is arranged between the design roll and the supply roll. The transfer roll (10) has a transfer surface (10a).
Is contacted with the design roll and is in contact with the tablet held on the supply roll for printing, and is switched appropriately to a non-operating position slightly apart from both rolls so that it can rotate at any position. There is.

The roll cleaning device (11) includes a cleaning roll (13) arranged above and in parallel with the transfer roll (10). On the outer peripheral surface of the cleaning roll (13), a plurality of convex portions (15) divided by a plurality of grooves (14) parallel to the axis are formed at equal intervals in the circumferential direction. The discs (16) are fixed to the both ends of the cleaning roll (13) by screws (17). On the outer periphery of the disc (16), the groove (14) for the cleaning roll (13)
The same number of protrusions (18) are formed at equal intervals. The protrusion (18) is L-shaped, and a notch (18a) is formed at the root portion. The notch (18a) of the protrusion (18) is
3) Match the bottoms of the grooves (14) at both ends, and align the tips (1) of the protrusions (18).
8b) occludes the groove (14) by matching the mouths of both ends. A cleaning material (19) is wound around the outer peripheral surface of the cleaning roll (13) along the convex portion (15) and the groove (14).
Then, the bolt (20) passed from the notch (18a) of the one disc (16) to the notch (18a) of the other disc (16) through the outside of the cleaning material (19) at the bottom of the groove (14). The nut (21) is screwed into the screw, so that the cleaning material (19) is fixed to the cleaning roll (13). Examples of the cleaning material (19) include nylon, paper and sponge, with nylon being preferred.

The cleaning roll (13) is connected to the pulse motor via the gears (22) (23).
It is connected to (24) and is intermittently rotated by one pitch or plural pitches of the convex portion (15).

A cleaning liquid tank (25) such as alcohol is installed above the cleaning roll (13). The bottom part of the tank (25) is connected to a branch pipe (26) with a lower branch,
A lower nozzle (28) for washing liquid droplets is connected to the lower end of (26) via a flexible tube (27). Each nozzle (28) corresponds to the transfer surface (10a) of the transfer roll (10) so that the cleaning roll (1
It is fixedly placed just above 3). A pinch valve (29) is provided in the tube (27). The pinch valve (29) includes a receiving plate (30) fixedly arranged on one side of the tube (27), a cylinder (31) arranged on the opposite side of the tube (27), and a rod of the cylinder (31). It consists of an operating piece (33) fixed to the tip of (32). Then, the actuating piece (33) moves to the tube (27) side, and the tube (27) is sandwiched between the receiving plate (30) to close the valve (29), and the flow path in the tube (27) is closed. To be closed. On the contrary, the operating piece (33) moves to the opposite side and separates from the tube (27), so that the valve (29) is opened and the flow path in the tube (27) is opened.

During the printing operation, the transfer roll (10) is in the operative position and away from the washing roll (13). At this time, the cleaning roll (13)
Is stopped and the pinch valve (29) is closed.

When cleaning the transfer roll (10), first set the pinch valve (2
9) is opened for a predetermined time, and a predetermined amount of cleaning liquid is dripped onto the convex portion (15) directly above the cleaning roll (13) to form this portion (15).
It is impregnated with the cleaning material (19). Next, the cleaning roll (13) rotates and stops until the convex portion (15) that was right above is located directly below, and the transfer roll (10) moves to the non-operating position to transfer the transfer surface.
(10a) is brought into pressure contact with the cleaning material (19) of the convex portion (15). The transfer surface (10a) is cleaned by rotating the transfer roller (10) with the cleaning roller (13) stopped in this way. When the cleaning is finished, the transfer roll (10) moves to the operating position and separates from the cleaning roll (13), and the convex portion (15) after the cleaning passes directly above the cleaning roll (13). The cleaning roll (13) rotates until it comes one pitch forward and stops.
As a result, the convex portion (15) immediately after the convex portion (15) that has been washed is directly above the cleaning roll (13), and next time, the unused cleaning material of the convex portion (15) is used. Wash according to (19).
In this way, one cleaning material (19) can be cleaned as many times as the number of convex portions (15). Depending on the material of the cleaning material (19), the cleaning material (19) of one convex portion (15) can be used for cleaning two or more times. In addition, the cleaning material (19) between the convex parts (15) is along the groove (14) and is held by the bolts (20), so that the dirty cleaning liquid after cleaning may scatter other convex shapes. It does not adhere to the cleaning material (19) of the portion (15). When one cleaning material (19) has been used, the bolt (20) is removed and the cleaning material (19) is replaced.

Cleaning of the transfer roll (10) as described above is performed at predetermined constant time intervals or by an appropriate detection device (10)
It can be done fully automatically when dirt is detected. It can also be done semi-automatically by the worker on a regular basis or when he / she finds it necessary.

Although the transfer roll cleaning device is shown in the above embodiment, the roll cleaning device according to the present invention can be applied to rolls other than the transfer roll.

EFFECTS OF THE INVENTION According to the roll cleaning apparatus of the present invention, as described above, the surface of the roll can be automatically cleaned, and there is no need for an operator to manually clean the surface, which saves labor. It is economical and extremely safe because it does not require labor costs. Moreover, since the surface of the cleaning roll is divided into a plurality of convex portions by the groove, it is possible to perform cleaning a plurality of times with one cleaning material, and it is not necessary to frequently replace the cleaning material. Furthermore, since the cleaning material is along the convex portion and the groove on the outer peripheral surface of the cleaning roll, the dirty cleaning liquid after cleaning does not scatter to the unused portion of the cleaning material that has not been cleaned, There is little risk that the roll will be contaminated by the dirty cleaning liquid after cleaning. Further, since the cleaning roll only needs to be arranged in parallel with the roll of the printing machine, it can be easily arranged in the limited space of the printing machine.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a partial cutaway front view showing a part of a transfer roll of a tablet printing machine and a cleaning device therefor, and FIG. 2 is a partial cutout showing a main part of FIG. A side view and FIG. 3 are perspective views of the cleaning roll. (10) ... Transfer roll, (11) ... Roll cleaning device, (13) ... Cleaning roll, (14) ... Groove, (15) ... Convex portion, (19) ... Cleaning material,
(24) ... pulse motor, (25) ... cleaning liquid tank, (26) ... branching pipe, (27) ... flexible tube, (28) ... nozzle, (29) ... pinch valve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Shiba 428-62, Fushiya-cho, Izumi City, Osaka Prefecture (56) References: Sho 50-76901 (JP, U)

Claims (1)

[Claims] 1. An outer peripheral surface having a plurality of convex portions in the circumferential direction.
Cleaning roll with multiple grooves (14) divided into (15)
(13), driving means for intermittently rotating the cleaning roll (13) by one pitch or a plurality of pitches of the convex portion (15), and the convex portion (15) on the outer peripheral surface of the cleaning roll (13) and the groove. Cleaning material (19) wound along the (14), and cleaning liquid supply means for supplying the cleaning liquid to the cleaning material (19) along the outer peripheral surface of the convex portion (15) of the cleaning roll (13) And a roll cleaning device for a tablet printing machine.