JPS6313008Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ink jet recording apparatus that reproduces images by controlling the flight directions of ink droplets jetted from a plurality of nozzles.

Conventionally, this type of apparatus has been constructed as shown in FIG. In Figure 1, 1 is an ink droplet 2
Single nozzle ink ejection head 3 that ejects
, a charging electrode 4 that applies a charge to the ink droplet 2, and a detection electrode 5 that synchronizes the ejection timing of the ink droplet 2 and the charging timing of the ink droplet 2;
An ink collection tray is equipped with a deflection electrode 6 that deflects the ink droplets 2 according to the amount of charge, and a gutter 7 that collects the ink droplets 2 that are not involved in recording.
A pipe 8 communicating with an ink tank (not shown) is connected to one discharge hole 1a provided in the center of the ink collection tray 1. 9 is a recording paper wound around the drum 10.

In the conventional example configured in this way, as the drum 10 rotates, the drum 1
The ink collection tray 1 moves pixel by pixel in the direction of the 0 axis, and the ink droplets 2 ejected from the ink ejection head 3 and involved in recording adhere to the recording paper 9 to reproduce the image, and the ink droplets 2 The ink droplets 2 adhering to each electrode 4, 5, and 6 at the start of recording when the flight path of the ink droplet is unstable, and the ink droplets 2 not involved in recording are collected in an ink collection tray 1 and placed in an ink tank (not shown). It will be collected. By the way, since it takes time to scan the entire width of the recording paper 9 wound around the drum 10 with one single-nozzle ink-jet head 3, usually multiple single-nozzle ink-jet heads 3 arranged in parallel are used. Alternatively, the recording speed may be increased by using a multi-nozzle ink ejection head (not shown) and multiple sets of charging electrodes 4, detection electrodes 5, and deflection electrodes 6 arranged in front of these multiple nozzles. There is. For this reason, the ink collection tray 1 provided at the bottom of each electrode 4, 5, and 6 must also be expanded, but it is virtually difficult to assemble the expanded ink collection tray 1 at the designed mounting angle. In an ink collection tray (not shown) that has one discharge hole in the center of the tray, the collected ink stays at the end of the ink collection tray (not shown) on the lower side. In addition, 1 provided in the center of the plate
In an ink collection tray (not shown) in which the surface of the tray is sloped downward toward two discharge holes, it is recommended to reduce the slope of the surface of the tray in order to minimize the volume occupied by the ink collection tray in an ink jet recording device. The slope of the surface of the pan on the lower side was lost, causing the collected ink to stay there. Furthermore, if there is a corner at the entrance of the discharge hole 1a (see Fig. 1c), the collected ink will be difficult to flow into the discharge hole 1a due to surface tension, causing the ink to remain in the ink collection tray 1. Ta. For this reason, the ink accumulated in the ink collection tray 1 dries and ink crystals accumulate, which has the disadvantage that the crystals mix with the ink collected in the ink tank and clog the nozzles 3, etc. .

The present invention relates to an ink collection tray for an ink jet recording device in which collected ink does not remain in the ink collection tray even if the ink collection tray is not assembled at the designed mounting angle in order to eliminate the drawbacks of the conventional example. It is something. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Figure 2 shows an embodiment of the present invention.
The same reference numerals as in FIG. 1 indicate the same parts, and numeral 11 indicates a plurality of single-nozzle ink ejection heads 3 or multi-nozzle ink ejection heads, and a plurality of sets of charging electrodes 4, detection electrodes 5, and 1, on which a deflection electrode 6 is placed and a gutter 7 is provided;
The ink collection tray 11 is constructed of two flat surfaces, and the ink collection tray 11 has an inlet at each corner of the front end and left and right side edges, either diagonally as shown in FIG. As shown in d, one rounded discharge hole 11a is formed along each corner.

In this embodiment configured as described above, if the ink collection tray 11 is attached to the ink jet recording apparatus by slightly lifting the ink jet head 3 side, the ink collection tray 11 can be attached to either the left or right side in FIG. 2b. Even when attached to an ink jet recording apparatus in a tilted state, the ink collected in the ink collection tray 11 always flows into one of the discharge holes 11a and is collected in an ink tank (not shown). In addition, since the inlet of the discharge hole 11a is chamfered, the ink collected in the ink collection tray 11 does not stay at the entrance of the discharge hole 11a but flows through the discharge hole 11.
flows into a. In addition, when discharging the collected ink from one of the discharge holes 11a, if the amount of ink discharged from one discharge hole 11a is insufficient, in advance, a desired amount of ink is added between the two discharge holes 11a. Several discharge holes 11a may be provided.

As explained above, according to the present invention, the collected ink can be collected in the ink tank without being retained in the ink collection tray, so that the ink retained in the ink collection tray dries and ink crystals are deposited. This has the advantage of preventing the crystals from mixing with the ink collected in the ink tank and clogging nozzles and the like. Further, there is an advantage that the volume occupied by the ink collection tray can be minimized.

[Brief explanation of drawings]

FIG. 1a is a configuration diagram of a conventional ink jet recording apparatus, FIG. 1b is a left side view of the ink collection tray in FIG. 1a, and FIG. 1c is a partially enlarged sectional view of the discharge hole in FIG. 1a. , Fig. 2a is a configuration diagram of an embodiment of the present invention;
Figure b is a left side view of the ink collection tray in Figure 2 a;
Figures c and d are partially enlarged sectional views of the discharge hole of Figure 2a. 1, 11... Ink collection tray, 1a, 11a...
Discharge hole, 2... ink droplet, 3... ink ejection head, 4... charging electrode, 5... detection electrode, 6... deflection electrode, 7... gutter, 8... pipe, 9... recording paper, 10...Drums.

Claims (1)

[Claims for Utility Model Registration] (1) Recording is performed by controlling the flight direction of ink droplets ejected from a plurality of nozzles using a charging electrode, a detection electrode, and a deflection electrode arranged in front of the plurality of nozzles, respectively. In an ink jet recording apparatus that reproduces an image by collecting the ink droplets that do not participate in the gutter and making the ink droplets that participate in recording adhere to the recording paper, the upper surface is composed of one plane, and the front end portion An ink collection tray, on which the gutter is protruding, and one ink discharge hole is formed at least at each corner of the front end and left and right side ends, is connected to the nozzle, the charging electrode, the detection electrode, and the ink collection tray. An ink jet recording device, characterized in that it is installed below the deflection electrode. (2) The ink jet recording device according to claim 1, wherein the discharge hole has a chamfered entrance.