JPS604689Y2 - Waterwheel polishing device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a water wheel type polishing device for removing burrs remaining on the shoulders of type belts used in line printers and the like.

Endless type belts made of steel used in type belt type line printers generally form their type by etching.

When output information is printed via an ink ribbon using the type belt after etching, the remaining burrs on the shoulders of type on the type belt (hereinafter referred to as the shoulders) may damage the ink ribbon. The problem is that the lifespan is greatly shortened.

Conventionally, therefore, the burrs remaining on the shoulders of type belts are removed by buffing.

A schematic diagram of such a conventional puffing process is shown in FIG.

In the figure, 1 is a type belt having a large number of predetermined type characters 1a formed on its outer circumferential surface by etching, 2 is a pair of rollers that can be rotated in forward and reverse directions, on which the type belt 1 is stretched, and 3 is type belt 1 formed with type characters. in contact with the surface and the roller 2
It is a buff that is installed so that it rotates in the opposite direction to the direction of rotation.

Now, in this configuration, in order to remove the burrs remaining on the shoulders of the type belt 1 which has been etched with a predetermined type pattern, the type belt is first stretched and attached to a pair of rollers 2.

Then, one of the rollers 2 is rotated in the direction of arrow A by a motor (not shown) to cause the type belt to run in the same direction.

At the same time, the buff 3 is rotated in the direction of arrow A', that is, in the opposite direction to the roller 2, by a motor (not shown).

As a result, the burrs remaining on the running direction side of the type belt 1, that is, on the left side of the page, are crushed and removed by the buff 3.

Next, a motor (not shown) connected to the rotating shaft of the roller 2 is rotated in the direction of arrow B to cause the type belt 1 to run in the same direction, and the buff 3 is also rotated in the direction of arrow B'. Any burrs remaining on the shoulder on the opposite side to the shoulder on the right side are removed.

In this way, the remaining burrs are removed and the character shoulders become rounded, but with this conventional method, it is difficult to adjust the degree of contact between the buff and the type surface, and some types do not have burrs completely removed, while others However, there was a problem in that the shape was distorted and the product value decreased.

In order to solve these problems, this idea proposes a new water wheel type polishing device that removes any burrs remaining on the shoulders of the letters by causing abrasive grains to fall and collide with the letters formed on the type belt. It is something to do.

Briefly stated, this idea consists of a plurality of packets arranged regularly on the inner circumferential surface, an external drum that accommodates a predetermined amount of abrasive grains and rotates in a predetermined direction, and an external drum that rotates in forward and reverse directions inside the external drum. It is characterized in that it consists of an external drum, which is arranged in a removable manner, and on the outer periphery of which the part to be polished is attached.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the water wheel type polishing device according to the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a side sectional view for explaining one embodiment of this invention, in which the same parts as in FIG. an internal drum 6 connected to 4 and capable of attaching a type belt 1 to its outer periphery;
is an external drum having a plurality of packets 7 regularly attached to its inner peripheral surface and abrasive grains 8 housed in its bottom surface.

Now, to explain the polishing operation in this configuration, first, the etched type belt 1 is attached to the outer periphery of the internal drum 5.

Then, the inner drum 5 and the outer drum 6, which are in a concentric relationship, are rotated by separate motors (not shown) in the following manner.

That is, while the inner drum 5 to which the type belt 1 is attached is rotated at high speed in the direction of arrow C, the outer drum 6 is rotated in the direction of arrow C.
'Rotates at low speed in the force direction.

As a result, the plurality of packets 7 attached to the inner circumferential surface of the external drum 6 sequentially scoop up the abrasive grains 8 contained in the bottom surface of the drum while rotating.

The abrasive grains 8 scooped up into the packet 7 fall naturally when the packet reaches a predetermined rotational upward position, and fall onto the type belt 1 attached to the internal drum 5 which is rotating at high speed.

As a result, the burrs remaining on the shoulder on the running direction side of the type belt are removed as if by being polished.

Thereafter, by continuing to rotate the outer drum 6 in the same direction and rotating the inner drum 5 in the opposite direction, that is, in the direction of the arrow, the burrs remaining on the shoulder on the opposite side to the above will be removed. .

However, in this case, since the rotation of the internal drum 5 and the falling direction of the abrasive grains 8 are in the same direction, the polishing effect is inferior to that in the case of the reverse relationship, and therefore the polishing time must be slightly longer.

Incidentally, according to experiments by the present inventor, good results have been obtained by setting the rotational speed of the internal drum 5 to about four times the rotational speed of the external drum.

In this embodiment, the internal drum 5 can be rotated forward and backward, and the external drum 6 is rotated only in one direction. However, every other opening surface of the packet 7 is rotated in the opposite direction alternately. Even better results can be expected if the external drum is mounted in such a manner that it can be rotated in forward and reverse directions.

Further, depending on the shape of the type on the type belt 1, it is also possible to use the polishing device at an angle.

Furthermore, the polishing device of the present invention can be applied not only to type belts but also to removing burrs and polishing various parts.

As is clear from the above explanation, according to the water wheel type polishing device according to the invention, the burrs remaining around the type belt shoulders of the type belt can be evenly polished off using the abrasive grains, so this process is When the type belt thus applied is applied to a printer, it is expected that the life of the ink ribbon will be extended, and it will greatly contribute to improving printing quality.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram for explaining conventional puff processing, and FIG. 2 is a side sectional view for explaining an embodiment of this invention. In the figure, 1 is a type belt, 1a is a type, 2 is a roller, 3 is a puff, 4 is a rotating shaft, 5 is an internal drum, 6 is an external drum, 7 is a packet, and 8 is an abrasive grain.

Claims (2)

[Scope of utility model registration request] (1) An external drum in which a plurality of packets are regularly arranged on the inner circumferential surface and which accommodates a predetermined amount of abrasive grains and rotates in a predetermined direction; , and an internal drum on the outer periphery of which a part to be polished is attached. (2) The part to be polished is comprised of an endless type belt made of steel having a plurality of letters etched on its outer circumferential surface. Water wheel type polishing device.