JPH07205401A - Ink recovery device of screen printing machine - Google Patents

Abstract

PURPOSE:To obtain an ink recovery device of a screen printing machine capable of easily recovering ink remaining on a screen or excess ink. CONSTITUTION:A plate frame 2 on which a screen 3 is to be stretched is formed by assembling hollow pipe materials 21, 22, 23, 24 so that the inner parts thereof are connected to each other. A plurality of ink suction holes 2a opened near the upper surface of the screen 3 are formed on the inner side faces of the pipe materials 21, 23 disposed on the both sides in the travel direction of a squeegee 4. In the plate frame 2, joint pipes 5 are provided on the pipe material 22. The joint pipes 5 are connected to an ink suction device 31 through a hose 6 or the like so that the ink suction holes 2a are connected to the ink suction device 31 through the inner parts of the pipe materials 21, 22, 23, 24 of the plate frame 2, the joint pipes 5, the hose 6, and the like. Ink on the screen 3 is sucked and recovered to the ink sucking device 31 bay being scraped up around the ink suction holes 2a by a spatula or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink recovery device for a screen printing machine, and more particularly to an ink recovery device capable of recovering the residual printing ink on the screen without bothering an operator.

[0002]

2. Description of the Related Art As a conventional ink recovery device for a screen printing machine, for example, one described in Japanese Patent Application Laid-Open No. 5-162284 is known. This Japanese Patent Laid-Open No. 5-16228
No. 4 gazette is provided with a suction pump, and a suction nozzle that can be gripped by an operator is provided at the tip of a suction hose of the suction pump, and the operator grips the suction nozzle and cleans it on the screen. There is described an ink recovery device, wherein the ink is sucked by a suction pump to be collected in a collection container.

[0003]

However, in the above-mentioned conventional ink collecting apparatus, the suction nozzle is arranged around the screen frame of the screen, and when sucking, the operator takes out the suction nozzle and the ink is ejected. Must be sucked, the suction work is complicated, and the location of the suction nozzle must be secured around the plate frame, and this suction nozzle may be an obstacle to the operator who prints. There was a problem. The present invention has been made in view of the above problems, and an object of the present invention is to provide an ink recovery device that can easily perform suction work and does not hinder an operator who performs printing.

[0004]

In order to achieve the above object, an ink recovery device for a screen printing machine according to the invention of claim 1 comprises a metal frame having a screen stretched in a hollow shape, and an inner surface of the frame. A plurality of ink suction holes are formed on the side facing each other in the vicinity of the upper surface of the screen, and ink extraction holes are formed in the frame, and the ink extraction holes are connected to a negative pressure suction type ink suction device.

Further, in the ink collecting device of the screen printing machine according to the invention of claim 2, between the opposite side portions of the rectangular frame on which the screen is stretched, the screen is movable on the screen along the side portions. A hollow suction pipe is detachably installed, and an ink suction hole opening near the upper surface of the screen is formed on the surface of the suction pipe in the moving direction side, and an ink extraction hole is formed in the suction pipe to remove the ink. The hole was connected to a negative pressure suction type ink suction device.

Further, in the ink collecting device of the screen printing machine according to the third aspect of the present invention, between the opposite side portions of the rectangular frame on which the screen is stretched, the screen is movable on the screen along the side portions. A hollow suction pipe is detachably installed to form an ink suction hole that opens on a lower surface of the suction pipe that faces the upper surface of the screen, and at the same time, an ink discharge hole is formed on the suction pipe and the ink discharge hole is a negative hole. Contacted a pressure suction type ink suction device.

[0007]

According to the ink collecting apparatus of the present invention, the ink remaining on the screen is scraped by a spatula or a squeegee in the vicinity of the ink suction hole, so that the ink suction device passes through the inside of the plate frame and the ink discharge hole. Is sucked into. For this reason,
The suction work is easy, and it is not necessary to arrange the suction nozzle around the plate frame, and there is no inconvenience that the worker sucks the ink solvent.

Further, according to the ink collecting apparatus of the second aspect, the ink can be collected by moving the suction pipe, and it is not necessary to use a spatula or the like, so that the ink can be collected more easily. The suction pipe is removable and movable, so the suction pipe is removed during printing, or unused areas that are not used for printing are formed on both sides of the screen so that the suction pipe is not used during printing. The suction pipe does not interfere with printing, and the suction pipe can be easily cleaned with the suction pipe removed.

Further, in the ink collecting apparatus of the third aspect of the present invention, in addition to the function of the second aspect, since the ink suction hole is formed on the lower surface of the suction pipe facing the screen,
Ink clogging the screen eyes can also be sucked and collected.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an ink collecting device of a screen printing machine according to an embodiment of the present invention, FIG. 1 is a perspective view schematically showing the ink collecting device, and FIG. 2 is an enlarged perspective view of a main part. 3 is a sectional view taken along line 3-3 of FIG.

In FIG. 1, 1 is a rectangular frame-shaped squeegee mounting frame, and 2 is a rectangular plate frame (frame) arranged inside the squeegee mounting frame 1. The plate frame 2 has a screen 3 on the lower surface underneath. A squeegee 4 that is stretched over the entire surface and that slides on a screen 3 is provided on the squeegee mounting frame 1. Detailed explanation is omitted here, but screen 3
Is made of nylon, silk or other gauze, or stainless steel. Further, the squeegee 4 is driven by an operator integrally with the squeegee mounting frame 1 and reciprocates as shown by an arrow in the figure.

The squeegee 4 is connected to a drive mechanism having an actuator such as a cylinder or a motor through a head or the like, and is driven by the drive mechanism to reciprocate as shown by an arrow in the figure. It is also possible. (Japanese Patent Laid-Open No. 4-28544, Japanese Utility Model Laid-Open No. 62-1781
45, etc.).

The plate frame 2 comprises four hollow pipe members 21, 22, 23, made of a metal such as aluminum or a resin.
24 are assembled in a rectangular shape, and each hollow pipe member 2
The insides of 1, 22, 23, and 24 communicate with each other. As shown in FIGS. 2 and 3, in the plate frame 2, a plurality of ink suction holes 2a are formed at predetermined intervals on the inner surfaces of the pipe members 21 and 23 on both sides of the squeegee 4 in the moving direction S, which face each other.
Further, joint pipes 5 and 5 are connected to the pipe member 22 at both ends of the outer surface, respectively. As shown in FIG. 3, the ink suction holes 2a are opened from inside the pipe members 21 and 23 to the inside of the plate frame 2 at a position near the screen 3, and the joint pipes 5 communicate with the inside of the pipe members 22 to suck the inks. The hole 2a and the joint pipe 5 are communicated with each other through the inside of each pipe member 21, 22, 23, 24.

A hose 6 is connected to the joint pipe 5 of the plate frame 2, and the joint pipe 5, that is, each pipe member 21 of the plate frame 2,
The insides of 22, 23, and 24 are connected to the ink suction device 31 via the hose 6. The ink suction device 31 is configured by providing a vacuum pump 33 driven by compressed air on a lid on an upper portion of a tank 32, and a hose 6 communicating with the joint pipe 5 is connected to an intake port of the vacuum pump 33. This ink suction device 3
In No. 1, the vacuum pump 33 is driven by compressed air to suck ink from the ink suction holes 2a by the action of negative pressure, and the sucked ink is stored in the tank 32.

In this embodiment, as is well known, the squeegee 4 is reciprocally moved in the arrow direction on the screen 3 in the plate frame 2 for printing. The excess ink on the screen 3 is sucked into the inside of each pipe member 21 of the plate frame 2 from the ink suction hole 2a by approaching the end side of the screen 3 using a squeegee 4 or a spatula, internal,
It is guided to the tank 32 through the joint pipe 5 and the hose 6 and collected. For this reason, it is not necessary to arrange nozzles or the like around the plate frame 2 which obstruct printing due to ink suction, and the printing operation can be carried out smoothly.

In particular, in this embodiment, the ink suction holes 2a are provided on both sides of the pipe members 21 and 2 in the moving direction of the squeegee 4.
When the squeegee 4 is automatically driven by a driving mechanism or the like, the excess ink is drawn around the ink suction holes 2a of the pipe members 21 and 23 by the reciprocating motion of the squeegee 4 during printing. Also in this case, the surplus ink can be collected, and printing can be efficiently performed with an appropriate amount of ink.

In this embodiment, the ink suction device 31 is also used.
Since the suction pump 33 is operated by using compressed air as a power source, it is easy to take explosion-proof measures. Then, the ink suction device 31
If the tank 32 is full of ink, the tank 3
Since it is only necessary to remove the lid of 2 and replace the tank body,
The replacement work is also easy. In this embodiment, the ink suction holes 2a are formed in the pipe members 21 and 23 on both sides in the moving direction of the squeegee 4. However, the ink suction holes 2a are formed in the pipe members 22 and 24, and work is performed when collecting ink. Person applies the ink to the ink suction holes 2a of the pipe members 22 and 24.
It is also possible to arrange it so as to move around.

4 and 5 show an ink collecting apparatus according to another embodiment of the present invention. FIG. 4 is a perspective view showing the main part thereof, and FIG. 5 is a sectional view taken along the line 5-5 of FIG. . In this embodiment and the embodiments described later, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, a pair of hollow square pipes (suction pipes) 28 and 29 are provided inside the plate frame 2.
These hollow square pipes 28 and 29 have mounting pieces 27 at both ends.
a and 27b are fixedly mounted, and the mounting pieces 27a and 27b are mounted on the plate frame 2 so that the upper surface of the screen 3 is slidably and detachably mounted on the pipes 22 and 24 in the same direction as the moving direction of the squeegee 4. Each of the square pipes 28 and 29 has a plurality of ink suction holes 2a formed on the opposite surfaces thereof, and the joint pipe 5 is provided on the upper surface of the end portion. In these square pipes 28 and 29, the joint pipe 5 is connected to the ink suction device 31 via the hose 6 and the like, and each ink suction hole 2a communicates with the suction pump 33 of the ink suction device 31 via the pipes 28 and 29 and the like. To do. Reference numeral 51 is a handle provided on the upper surfaces of the square pipes 28 and 29.

Also in this embodiment, the operator holds the handle 51 and attaches the hollow square pipes 28 and 29 to the screen 3.
By sliding the top in the direction of the arrow in FIG. 4, the ink on the screen 3 can be sucked and collected, and it is not necessary to scrape the ink with a spatula or the like, and the collection is easy. In particular,
In this embodiment, since the hollow square pipes 28 and 29 are removable, the hollow square pipes 28 and 29 can be removed at the time of printing or the like, and the hollow square pipes 28 and 29 do not interfere with printing. Further, the hollow square pipes 28, 29 can be easily cleaned.

In the above embodiment, the screen 3
If a range (non-use area) where the plate film is not formed is provided on both sides of the above, the hollow square pipes 28 and 29 are positioned in the non-use area to perform printing with the hollow square pipes 28 and 29 attached. It is also possible (state shown).

FIG. 6 is a cross-sectional view of the essential parts showing another embodiment of the present invention. This embodiment has the same main structure as that of the embodiment shown in FIG. 4, and the same parts are designated by the same reference numerals and the description thereof will be omitted. As shown in the figure, in this embodiment, the square pipes 28 and 29 are arranged so that the lower surfaces thereof are spaced apart from the upper surface of the screen 3 by a small distance, and the square pipes 28 and 29 are arranged on the lower surfaces facing the screen 3, respectively. The slit 52 extending in the longitudinal direction is formed as an ink suction hole.

In this embodiment, each square pipe 28,
By sliding 29, the ink clogged in the screen 3 can also be sucked and taken out, and proper printing can be reliably performed. Although the two square pipes 28 and 29 are provided in the embodiments of FIGS. 4 and 5 and the embodiment of FIG. 6 described above, it goes without saying that one square pipe 28 or 29 is sufficient.

[0024]

As described above, according to the ink collecting device of the screen printing machine of the first aspect of the invention, the frame on which the screen is stretched is formed in a hollow shape, and the screen is formed on the inner surface of the frame. Since the ink suction hole opening near the upper surface is formed, the ink extraction hole communicating with the ink suction hole is formed in the frame, and the ink extraction hole is connected to the ink suction device, the suction work is easy, and In addition, it is not necessary to dispose a member such as a suction nozzle that may interfere with printing around the screen or the plate frame, and printing can be performed smoothly and easily.

According to the ink collecting device of the screen printing machine of the second aspect, the hollow suction pipe is slidably and detachably mounted on the screen between the opposing frame members forming the rectangular frame. Along with the installation, an ink suction hole opening near the upper surface of the screen and an ink extraction hole communicating with the ink suction hole through the inside are formed in the suction pipe, and the ink extraction hole is a negative pressure suction type ink suction device. The ink can be collected by moving the suction pipe, and since it is not necessary to use a spatula or the like, the screen is not damaged or stretched, and the ink can be more completely and easily collected.

Further, according to the ink collecting device of the screen printing machine of the third aspect, the hollow suction pipe is slidably and detachably mounted on the screen between the opposing frame members forming the rectangular frame. An ink suction hole is formed in the suction pipe while facing the upper surface of the screen, and an ink extraction hole communicating with the ink suction hole through the inside is formed in the suction pipe, and the ink extraction hole is a negative pressure suction type ink. Since the suction pipe is in contact with the suction pipe, it is possible to suck and remove the ink clogged in the screen by moving the suction pipe, so that proper printing can be easily performed.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing an ink recovery device of a screen printing machine according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of the ink recovery apparatus.

3 is a sectional view taken along the line 3-3 of FIG.

FIG. 4 is a perspective view schematically showing a main part of an ink recovery device of a screen printing machine according to another embodiment of the present invention.

5 is a cross-sectional view taken along the line 5-5 of FIG.

FIG. 6 is a sectional view of an essential part of an ink recovery device of a screen printing machine according to still another embodiment of the present invention.

[Explanation of symbols]

 1 Squeegee mounting frame 2 Plate frame (frame) 2a Ink suction hole 3 Screen 4 Squeegee 5 Joint pipe 21, 22, 23, 24 Pipe 27, 28 Hollow square pipe (suction pipe) 31 Ink suction device 32 Tank 33 Suction pump 52 Slit (Ink suction hole)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kihachiro Shinohara 4-14-12 Koishikawa, Bunkyo-ku, Tokyo Joint printing Co., Ltd. (72) Nobuo Namiki 4-14-12 Koishikawa, Bunkyo-ku, Tokyo Joint printing Within the corporation

Claims (3)

[Claims] 1. A metal frame having a screen stretched is formed in a hollow shape, and a plurality of ink suction holes are formed on the inner surface of the frame so as to face the vicinity of the upper surface of the screen,
An ink recovery device for a screen printing machine, wherein an ink extraction hole is formed in the frame, and the ink extraction hole is connected to a negative pressure suction type ink suction device. 2. A hollow suction pipe, which is movable on the screen along the side portions, is detachably installed between opposite side portions of a rectangular frame on which the screen is stretched, and the suction pipe is moved. Ink suction holes that open in the vicinity of the upper surface of the screen are formed on the surface on the direction side, ink discharge holes are formed in the suction pipe, and the ink discharge holes are connected to a negative pressure suction type ink suction device. Ink collection device for screen printing machine. 3. A hollow suction pipe, which is freely movable on the screen along the side portions, is detachably installed between opposite side portions of a rectangular frame on which the screen is stretched. A screen characterized by forming an ink suction hole opening at a lower surface facing the screen upper surface, forming an ink extraction hole in the suction pipe, and connecting the ink extraction hole to a negative pressure suction type ink suction device. Ink collection device for printing machines.