JPH0213460Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention involves fitting a ceramic bowl base concentrically around a core member with a circular cross section that is rotatably supported on a support member, and passing it through the core member. By suctioning air, the inside of the substrate is held under negative pressure, and the pattern is printed on the outer surface of the substrate by touching the substrate against a printing plate on which a pigment film of a pattern is formed on the surface. This invention relates to a substrate holding device for a pattern printing machine.

Problems to be Solved by Conventional Technologies and Ideas Conventionally, the substrate holding device in such a pattern printing machine consists of a rotary plate that is rotatably supported around its axis by a supporting member, and is made of hard synthetic rubber and has a circular cross section. A core member forming a shape is fixed concentrically with the axis of the rotary plate, and an air hole provided through the center of the core member and opened at its tip is connected to an air suction device through the center hole of the rotary plate. When the base of the ceramic bowl is fitted to the core member and the inner peripheral surface of the base is pressed against the outer peripheral surface of the core member, the air between the core member and the base is sucked out from the opening at the tip of the core member by the suction device. There is one in which the substrate is adsorbed and held by the core member by being attached to the core member.

By the way, the inner diameter of bisque-fired base materials varies between products due to the difference in shrinkage rate. Conventionally, the side surface of the core member was formed into a substantially spherical shape, but in this case, when the base material was fitted to the core member, the base material may be inclined with respect to the core member, and the side surface of the core member was formed in a substantially spherical shape. If the substrate is tilted and tilted, it will cause rotational runout, so if the printing plate is touched in this state, uneven printing will occur on various parts of the outer surface, resulting in printing defects, or parts of the outer surface will be strongly pressed against the printing plate. The base material was sometimes damaged.

Means for Solving the Problems The present invention, as a means for solving the above-mentioned problems, forms an abutting surface around the core member, on which the opening edge of the substrate comes into contact, at right angles to the axis of the core member, A retaining ring is fitted around the outer periphery of the core member at the front part of the abutment surface, and has a ring shape with a constant thickness and is elastically deformed uniformly in the radial direction by engagement with the inner surface of the substrate.

Functions and Effects The substrate holding device for a pattern printing machine for ceramic bowl substrates of the present invention has the above-mentioned structure, and since the abutment surface perpendicular to the core member is formed around the core member, there is no variation in the substrate. By abutting the opening edge of the substrate against this abutting surface, the axis of the substrate becomes parallel to the axis of the core member, and the retaining ring fitted on the core member engages with the inner surface of the substrate. Because it deforms elastically evenly in the radial direction, the center of the base material coincides with the center of the core member,
With these, by fitting the base material around the core member and abutting the opening edge against the abutment surface, the base material is automatically centered with respect to the core member, which prevents rotational runout of the base material. This has the effect of reliably preventing printing defects and damage to the substrate, thereby improving production efficiency.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a rotating shaft supported via bearings 3, 3 by a support member 2 erected on a base (not shown), and a mounting plate 5 is integrally attached to the tip of the rotating shaft 1. A fixing plate 6 is fixed to the front surface of the fixing plate 6 by tightening screws 7, and a core member 8 made of hard synthetic rubber and having a circular cross section is attached to the front end surface of the fixing plate 6. The core member 8 is aligned with the axis of the rotating shaft 1 and fixed by baking or adhesive, and as shown in FIG. The outer periphery of the part to be fitted has a shape that roughly follows the inner circumferential shape of the base material a, and the fitted base material a
A slight gap is left between the inner periphery of the substrate a, and a stepped portion 10 of a constant width is formed on the outer periphery of the joint with the fixing plate 6. An abutment surface 11 against which the abutment abuts is formed perpendicular to the axis of the rotating shaft 1, and an annular groove 12 of a constant width is formed concentrically with the rotating shaft 1 on the outer periphery of the front part of the abutting surface 11. The annular groove 12 is provided with a retaining ring 1 made of sponge and having approximately the same width as the groove width of the annular groove 12 and a constant thickness greater than the depth of the groove.
4 is fitted, and the outer peripheral surface of the retaining ring 14 protruding from the outer surface of the core member 8 is tapered along the outer surface of the core member 8, and a thin film 15 made of synthetic rubber is attached. . In addition, an air hole 16 that opens on both front and rear end surfaces is transparently provided in the center of the core member 8, and this air hole 16 is formed at the center of the rotating shaft 1 through the center hole of the fixed plate 6 and communicates with the through hole 17. The communication hole 17 is connected to a communication hole 18 opened on the outer peripheral surface of the rotating shaft 1, and an annular hole 2 formed around the communication hole 18.
0 to a connection port 21 formed on the upper surface of the support member 2, and the connection port 21 is connected to an air suction device (not shown).

The substrate holding device of this embodiment has the above configuration,
When the base material a is fitted into the core member 8 and its opening edge abuts against the abutting surface 11, the retaining ring 14 is crushed toward the center by the inner peripheral surface of the base material a, as shown in FIG. The elastic restoring force brings the outer periphery into close contact with the inner circumferential surface of the substrate a, thereby sealing the space b between the inner circumferential surface of the substrate a and the core member 8, and the air in this space b is removed from the core by the suction device. By suctioning out from the opening of the air hole 16 of the member 8 and keeping the inside of the space b at a negative pressure, the base material a is adsorbed and held on the core member 8, and the base material a is fitted into the core member 8. At this time, the retaining ring 14, which is crushed toward the center by engagement with the inner circumferential surface of the substrate a, is elastically deformed uniformly in the circumferential direction. As a result, the center of the substrate a coincides with the axis of the core member 8, and the opening edge of the substrate a abuts against the abutment surface 11, so that the abutment surface 11 is aligned with the rotation axis. Since it is perpendicular to the axis of rotation shaft 1, the axis of substrate a is parallel to the axis of rotating shaft 1, and even if there are variations in substrate a,
A base material a is attached concentrically to the rotating shaft 1.

Then, a pigment film of a pattern is formed on the lower surface of the rubber plate that rotates in a plane parallel to the upper side of the side circumferential surface of the base material a held by the core member 8, and the lower surface of the rubber plate is transferred to the base material a.
By pressing it against the side circumferential surface of the base material A and rotating it, the substrate a is touched and a pattern is printed on the side circumferential surface of the substrate a.As mentioned above, the axis of the substrate a is aligned with the rotating shaft 1. Since it is aligned with the axis, the substrate a will not run out when it comes into contact with the rubber plate,
The side circumferential surface of the substrate a is evenly pressed against the lower surface of the rubber plate at each part, allowing accurate printing.

In addition, in this embodiment, since the thin film 15 made of synthetic rubber is attached to the outer periphery of the retaining ring 14, there is an advantage that the airtightness between it and the inner circumferential surface of the substrate a is increased. Since the outer surface shape of 8 is shaped along the inner surface of the base material a, the core member 8 of the base material a
In addition, the volume of the space b between the inner circumferential surface of the substrate a and the core member 8 is small, and the space b quickly becomes negative pressure by suction from the suction device. There is an advantage that the base material a fitted into the core member 8 is quickly adsorbed and held, and furthermore, the retaining ring 14 has an annular groove 12 formed in the core member 8.
Since the retaining ring 14 is fitted to the inner circumferential surface of the retaining ring 14 when the base material a is fitted, the retaining ring 14 is prevented from being deformed in the axial direction due to the engagement with the inner peripheral surface thereof, and the centering of the base material a is performed accurately. There are advantages.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a partial sectional view showing a state in which the substrate is held. 1: Rotating shaft, 2: Support member, 8: Core member, 1
1: Abutment surface, 14: Holding ring, a: Base material.

Claims (1)

[Scope of utility model registration request] A ceramic bowl base is fitted concentrically around a core member with a circular cross section that is freely rotatably supported on a support member, and air is sucked through the core member to create a negative pressure inside the base for suction. In a pattern printing machine, the pattern is printed on the outer surface of the substrate by holding the substrate and touching the printing plate on which a pigment film of the pattern is formed on the surface of the printing plate. An abutting surface on which the opening edge of the substrate abuts is formed perpendicular to the axis of the core member, and an annular shape having a constant thickness is formed around the outer periphery of the core member at the front part of the abutting surface and engages with the inner surface of the substrate. A substrate holding device for a pattern printing machine for ceramic bowl substrates, characterized in that a holding ring is fitted which causes elastic deformation uniformly in the radial direction when the substrate is pressed.