JPH0432297Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an ink sensor that detects and displays the amount of ink remaining in a cylinder of a rotary copying machine or the like.

(Prior Art) As a conventional ink sensor for detecting and displaying the amount of ink remaining in the cylinder of a rotary copying machine, one disclosed in Japanese Utility Model Application Publication No. 147666/1983 is known. This has a float that receives buoyancy from the ink, a switch operating piece that follows the vertical movement of the float, and a switch that is operated by the switch operating piece, and has a preset ink dripping time after the plate cylinder stops. The electrical on/off signal of the switch is energized to the ink replenishment display device via a delay means that energizes the ink replenishment display device after the ink replenishment display device is energized.

(Problem to be solved by the invention) However, in the above-mentioned conventional example, the timer (delay means) operates for a preset ink dripping time after the cylinder (plate cylinder) stops (printing is performed by rotating the cylinder of the rotary copying machine). For example, 30 seconds to 1 minute is set as the time for the ink that adheres to the inner peripheral surface of the cylinder to drip after the cylinder stops. Is it at least the level of
I can't decide if it's there or not. Therefore, even if there is enough ink, it cannot be determined that there is enough ink unless one waits for a certain period of time, which is inconvenient.

The present invention was developed to solve the above-mentioned problems, and its purpose is to make it possible to immediately determine if there is ink above a predetermined level after the cylinder of a rotary copying machine has stopped, and to make it possible to immediately determine if there is ink above a predetermined level after the cylinder of a rotary copying machine has stopped. This is to prevent overflow from occurring due to overfilling when refilling ink.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a switch actuating piece 14 interlocking with the float 6, and a switch 15 actuated by the switch actuating piece 14.
The switch 15 causes the first lamp 16 to be lit when the amount of ink in the cylinder 1 is less than a predetermined level E, and the timer 17 that operates when the cylinder 1 is stopped causes the first lamp to be lit for a predetermined time. It consists of a second lamp 18 of a different color, and the ink level in the cylinder is detected by a combination of the two colors.

(Operation) According to the above means, the presence or absence of ink at the predetermined level E can be determined immediately after the cylinder 1 is stopped, and
A first lamp 16 that is turned ON/OFF by a switch 15 that operates in conjunction with the float 6, and a second lamp that is activated by a timer 17 after the cylinder 1 is stopped.
In combination with the lamp 18, it is possible to determine how much ink needs to be replenished, and overflow can be prevented.

(Embodiment) Next, a preferred embodiment of the present invention will be described based on the attached drawings.

FIG. 1 is a side view of a cylinder of a rotary copying machine to which the ink sensor of the present invention is applied.

In the figure, reference numeral 1 indicates a cylinder of a rotary copying machine, the outer surface 2 of which is provided with an ink inlet 3, and covered with an airtight lid 4 equipped with a gasket 4a and the like.
Inside the cylinder 1, a float 6 is fixed to the rotating shaft 7 of the cylinder 1 via a hanging shaft 5.
One end 7a of the rotating shaft 7 is rotatably supported by a support portion 8a of a support shaft 8 that stands up from the cylinder inner wall 1a. The other end 7b of the rotating shaft 7 is connected to the cylinder end surface 1.
The hole 9 extending outside from the hole 9 drilled in b and through which the rotating shaft 7 is inserted is made airtight with a packing 12 or the like.

Next, the principle of the ink sensor of the present invention will be explained with reference to FIGS. 2 to 5.

At the tip of a support rod 13 that extends in the opposite direction to the float 6 with respect to the rotating shaft 7 in the cylinder 1, there is a float that rises when there is a large amount of ink and descends when there is a small amount of ink due to the buoyancy of the ink in the cylinder 1. A switch actuation piece 14 interlocked with the switch 6 is provided. As shown in FIG. 2, a switch 15 is provided which is turned on by contact with the switch operating piece 14 when the amount of ink in the cylinder 1 is less than the level E that requires replenishment. Therefore, the red first
The lamp 16 is turned on. In addition, near the first lamp 16, when the cylinder 1 is stopped, a timer 17 is activated for a predetermined period of time (the cylinder 1
While rotating and printing, cylinder 1
For example, 30
Set seconds or 1 minute. ) A green second lamp 18 is provided which lights up. and the first lamp 16 and the second lamp
The lamps 18 are lined up and housed in a lamp box 19 whose one side is made of glass.

Note that the circuit including the switch 15 and the first lamp 16 is energized at the same time as the cylinder 1 stops rotating.

In the above configuration, as soon as the cylinder 1 stops rotating, the second green lamp 18 lights up due to the action of the timer 17, but the amount of ink in the cylinder 1 is greater than a predetermined level E (level F). At this time, the switch operating piece 14 does not come into contact with the switch 15, so the first red lamp 16 does not light up, and it is immediately known that the amount of ink in the cylinder 1 is sufficient. Then, after a predetermined period of time has elapsed, the second lamp 18 goes out and the state shown in FIG. 4 is reached.

When the amount of ink in the cylinder 1 is less than a predetermined level E, as shown in FIG. While the second lamp 18 is lit, the ink 20 adhering to the inner peripheral surface of the cylinder 1 begins to drip, and when the amount of ink exceeds level E, the switch operating piece 14 is activated as shown in FIG. When the switch 15 comes out of contact, the first lamp 16 goes out, and after a predetermined period of time has elapsed, the second lamp 18 also goes out, resulting in the state shown in FIG. Therefore, from the state shown in FIG. 3 or FIG. 4, it can be seen that the amount of ink in the cylinder 1 is slightly larger than the level E that requires replenishment. In this state, when replenishing ink, only a small amount is required, so you can be careful not to overflow due to overfilling.

However, if the ink attached to the inner circumferential surface of the cylinder 1 starts to drip after the cylinder 1 is stopped, and the level E is not exceeded even after the second green lamp 18 goes out after a predetermined period of time, the ink shown in FIG. As shown, the red first lamp 16 remains lit, indicating that the amount of ink in the cylinder 1 is considerably less than level E, and that it is necessary to replenish immediately.

(Effects of the invention) As detailed above, according to the invention, after the rotation of the cylinder of a rotary copying machine has stopped, if the amount of ink in the cylinder is greater than a predetermined level, it can be immediately detected without waiting, and the ink is less than a predetermined level, a lamp that lights up in conjunction with the float,
Depending on the color combination with the second lamp activated by the timer, it can be determined whether immediate replenishment is required or whether a small amount is sufficient, thereby preventing overflow due to overfilling of ink. be able to.

[Brief explanation of the drawing]

The drawings show preferred embodiments of the present invention.
The figure is a side view of a cylinder of a rotary copying machine to which the ink sensor of the present invention is applied, and FIGS. 2 to 5 are diagrams showing the principle of the ink sensor of the present invention. In the drawing, 1 is a cylinder of a rotary copying machine, and 6 is a cylinder of a rotary copying machine.
is a float, 14 is a switch operating piece, 15 is a switch, 16 is a first lamp, 17 is a timer, 1
8 is the second lamp, E is the level of the amount of ink that needs to be replenished, and F is the level of the amount of ink that is in a sufficient state.

Claims (1)

[Claims for Utility Model Registration] An ink sensor that detects the amount of ink remaining in a cylinder by vertical movement of a float provided in the cylinder, comprising: a switch actuation piece that interlocks with the float; A switch that turns on and off,
This switch causes a first lamp to be lit when the amount of ink in the cylinder is less than a predetermined level, and a second lamp of a different color from the first lamp to be lit for a predetermined time by a timer that works when the cylinder is stopped. An ink sensor that detects the level of ink in a cylinder using a combination of two colors.