JPS6137119B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides (i) printing wheels arranged rotatably in parallel to each other on a cylindrical printing wheel, each having a type on its outer periphery, and an internal tooth portion formed on each inner periphery. a plurality of type rings; and (ii) a pinion disposed in a recess of the printing wheel and axially movable by an adjustment spindle so as to be able to engage any of the internal teeth of the plurality of type rings. This invention relates to a printing wheel device for a rotary printing device.

Printing wheel devices for conventional rotary printing machines of this type are known, for example, from German patent application no.
Disclosed in P3030105, No. 4-27. In conventional printing wheel devices, a pinion is rotated by an adjusting spindle in order to move the type placed on the outer periphery of the type ring to a predetermined position, that is, a printing station. The type ring to be rotated, that is, the type ring adjacent to the type ring being set, is slightly rotated as the type ring to be rotated due to the frictional force caused by the fact that the type rings are arranged close to each other. There was a difficult point. For this reason, after the desired type ring setting operation, the inner teeth of the type ring adjacent to the set type ring are misaligned with the inner teeth of the set type ring, so the setting There was a problem in that the pinion could not be moved axially and engaged with the internal teeth of the type ring adjacent to the type ring. This has the disadvantage of temporarily stopping the printing wheel device, which in turn requires returning each type ring to its correct alignment position and aligning the gaps between the internal teeth of each type ring. The work was complicated. The pinion was only able to engage the internal teeth of the other type ring after completion of the type ring realignment operation.

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide an improved printing wheel assembly which prevents unwanted rotation of adjacent type rings during the desired type ring setting operation.

According to the invention, the internal gearing of the type ring adjacent to the meshed type ring of the pinion and the fixing member engaged with the printing wheel are rotatably and axially movable relative to the adjusting spindle on both sides of the pinion. The above-mentioned drawbacks of the prior art are obviated by the non-permanent attachment.

In the printing wheel device of the present invention, the fixing members disposed on both sides of the pinion on the adjusting spindle are engaged with the type ring adjacent to the type ring being set and the printing wheel supporting the type ring. This prevents adjacent type rings from being rotated undesirably.

According to a preferred embodiment of the invention, the fixing member includes at least one toothing which can engage with an internal toothing of a type ring adjacent to the type ring being set;
It includes a projection which can be inserted into a groove extending in the printing wheel parallel to the axis of the adjusting spindle.

The present invention will be explained below along with preferred embodiments. In FIG. 1, the printing wheel device 1 is connected to the shaft 2.
It includes a support or printing wheel 3 which is rotatable around the . The shaft 2 is pivotally supported by the housing 4.

The printing wheel 3 has a small diameter section 5 on which a plurality of type rings 6 are supported. The plurality of type rings 6 are
It includes an inner ring 7 and an outer ring 8 made of an elastic material and supported on the outer circumferential surface of the inner ring 7 and having typefaces 9 formed on the outer circumference. Each of the plurality of type rings 6 includes an internal toothed part 10 on the inner periphery thereof.

The plurality of type rings 6 are relatively rotatable by a pinion 11 housed in a recess 12 of the printing wheel 3. An adjusting spindle 14, fitted with a rotation knob 13 at one end and cooperating with the pinion 11, causes the pinion 11 to be translated and rotated relative to the shaft 2. 1st
In the figure, the pinion 11 is connected to the inner teeth 10 of the second type ring from the right among the plurality of type rings 6.
, so that the type ring meshed with the pinion 11 can be rotated with respect to the other type ring by means of the rotary knob 13 or the adjusting spindle 14.

There is a printing wheel 3 around the outer periphery of the printing wheel 3 that forms the printing section.
A pressurizing surface (not shown) is disposed opposite the outer peripheral portion of the pressurizing surface. The recording medium is pressed against the type 9 by the pressing surface. Prior to pressing the recording medium by the pressure surface, the type 9 is supplied with ink by an ink supply device (not shown) and is moved to the printing section as the printing wheel 3 rotates around the shaft 2. . As a result, appropriate printing is performed on the recording medium. The printing section is formed, for example, in area 15 in FIG.

In order to print a desired word consisting of a plurality of characters, a plurality of type rings 6 must be rotated one after the other in succession by means of a regulating spindle 14 and a pinion 11 mounted on the regulating spindle 14. As the plurality of type rings 6 rotate, the type to be printed can be placed in a predetermined printing area around the outer periphery of the printing ring 3. The pinion 11 is continuously moved and rotated until it is engaged with each of the type rings 6 to be set and the desired type is placed in a predetermined printing section. After the character setting process, the pinion 11 can be moved parallel to the shaft 2 of the printing wheel 3 when the teeth of the internal teeth 10 of the character ring 6 are aligned in the shaft 2 direction. Only in this case can the teeth of the pinion 11 move freely through the gap of the internal teeth 10 of the type ring 6. Since the type 9 is disposed on the outer periphery of the type ring 6, the type 9 of the type ring 6 is always accurately aligned within the printing portion 15 when the internal teeth of each type ring of the type ring 6 are aligned. ing.

The displacement of the type ring 6 adjacent to the type ring being actually set due to friction caused by the rotation of the type ring being set is caused by
This is prevented by 7. The fixing members 16, 17 are connected to the adjusting spindle 14 by fixing rings 18, 19.
Although the upper axial movement is prevented, it is not connected to the adjusting spindle 14 and cannot be rotated as the adjusting spindle 14 rotates.

The fixing members 16, 17 have a toothed portion 2 at the top end in FIGS.
It is equipped with 0. At the opposite end, ie opposite the end formed by the teeth 20, the fixing elements 16, 17 are each provided with a projection 21 which projects into a groove 22 provided in the recess 12 of the printing wheel 3. Fixed member 16,1
7, the fixing members 16, 17 center around the adjustment spindle 14.
It will be understood from FIG. 2 that the rotation of can be prevented. As shown in FIG. 1, when the pinion 11 meshes with the internal teeth 10 of the second type ring 6 from the right, the teeth 20 of the fixing members 16 and 17 simultaneously engage the type ring 6 being set, that is, the second type ring 6 from the right. The inner teeth 10 of the type ring 6 adjacent to the type ring 6 are engaged with each other. As the protrusion 21 and groove 22 fit together, the fixing member 1 around the adjustment spindle 14
6, 17 are prevented from rotating, so that the type ring adjacent to the type ring 6 being set can be securely fixed in contact with the type ring being set and even under frictional forces. In this way, even if the type ring being set is rotated, the adjacent type rings are accurately fixed in position by the fixing members 16 and 17, so that after setting the type ring being set, the adjusting spindle 14 can be moved in the axial direction. , the pinion 11 can be easily engaged with the internal teeth of the adjacent type ring.

[Brief explanation of the drawing]

1 is a sectional view taken along line 1--1 in FIG. 2 of a printing wheel device for a rotary printing machine according to the invention, and FIG. 2 is a simplified side view of the same printing wheel device. 1...Printing wheel device, 2...Shaft, 3...Printing wheel,
4...Housing, 5...Small diameter part, 6...Type ring,
7...Inner ring, 8...Outer ring, 9...Print, 1
0...Internal tooth part, 11...Pinion, 12...Recessed part, 13
... Rotation knob, 14 ... Adjustment spindle, 15 ... Printing section, 16, 17 ... Fixing member, 18, 19 ... Fixing ring, 20 ... Teeth, 21 ... Projection, 22 ... Groove.

Claims (1)

[Scope of Claims] 1 (i) A plurality of type rings arranged rotatably in parallel to each other on a cylindrical printing wheel, each having a type on its outer periphery, and each having internal teeth on its inner periphery. and (ii) a pinion disposed in the recess of the printing wheel, the pinion being moved in the axial direction by an adjusting spindle and capable of meshing with any of the internal teeth of the plurality of type rings. In a printing wheel device for a printing device, fixed members are attached to both sides of the pinion so as to be rotatable but immovable in the axial direction with respect to the adjusting spindle, and the type ring has the internal teeth meshing with the pinion. A printing wheel device characterized in that the fixing member is engaged with adjacent type rings, and the fixing member is engaged with the printing wheel. 2. The fixed member includes at least one tooth portion that engages with an internal tooth portion of a type ring adjacent to the type ring being set, and a protrusion that is fitted into a groove extending in the axial direction of the adjustment spindle within the printing ring. The printing wheel device according to claim 1, characterized in that the printing wheel device includes: