Connection device and connection method

Abstract

To provide a connection device which eliminates needs of pushing out air in a paste supply path during syringe replacement and returning air in the paste supply path to an ink tank.SOLUTION: A connection device 100 connects a syringe 200 having a discharge port 210 with a supply port 300. The connection device 100 has: a suction port 28 for suctioning air in an internal space 18 of the connection device 100; an insertion port 12 into which the syringe 200 is inserted; and an attachment port 22 for connecting the supply hose 300 with the discharge port 210. The syringe 200 and the supply hose 300 are connected by a decompression space 930 formed by decompressing the internal space 18.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a connection device and a connection method for connecting a syringe containing paste to a supply hose that supplies the paste. [Background technology]

[0002] Conventionally, every time a syringe containing paste is replaced, the paste is discharged from a hose to push out air from the paste supply path, thereby removing air that has become trapped in the paste supply path. Alternatively, there is known a device that removes air from the supply tube by returning the ink and air from the supply tube to an ink tank (paragraphs 0067 and 0068 of Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-000919 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present disclosure is to provide a connection device that eliminates the need to push out air from within a paste supply path when replacing a syringe, and also eliminates the need to return the air from within the paste supply path to an ink tank. [Means for solving the problem]

[0005] The connection device of the present disclosure includes: A connection device that connects a syringe having a discharge port to a supply hose, a suction port for sucking air from an internal space of the connection device; an insertion port for inserting the syringe; a connection port for connecting the supply hose to the discharge port; It has. [Effects of the Invention]

[0006] According to the present disclosure, the syringe and the supply hose are connected in a reduced pressure internal space, so that air is removed from the paste supply path. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a front view of a connection device 100 and a syringe 200 according to a first embodiment. [Figure 2] 1 is a plan view of a connection device 100 and a syringe 200 according to a first embodiment. [Figure 3] 1A and 1B are an end view and a cross-sectional view of the connection device 100 according to the first embodiment, in which (a) is an end view taken along line AA in FIG. 1, and (b) is a cross-sectional view taken along line BB in FIG. [Figure 4] 1 is an exploded perspective view of a connection device 100 according to a first embodiment. [Figure 5] FIG. 2 is a diagram illustrating a connection method according to the first embodiment. [Figure 6] FIG. 2 is a diagram illustrating a connection method according to the first embodiment. [Figure 7] FIG. 2 is a diagram illustrating a connection method according to the first embodiment. [Figure 8] FIG. 2 is a diagram illustrating a connection method according to the first embodiment. [Figure 9] FIG. 2 is a diagram showing an example according to the first embodiment. [Figure 10] FIG. 10 is an exploded perspective view of a connection device 100 according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be noted that the present disclosure is not limited to these embodiments. Furthermore, the components described below can be combined as appropriate. Furthermore, when there are multiple embodiments, the respective embodiments can be combined.

[0009] Embodiment 1 Overall structure (Fig. 1, Fig. 2) FIG. 1 is a front view of a connection device 1 and a syringe 200 according to the first embodiment. FIG. 2 is a plan view of the connection device 1 and the syringe 200 according to the first embodiment.

[0010] ●Connection device 100 The connection device 100 is a device for connecting the syringe 200 and the supply hose 300 . The connecting device 100 has a syringe 200 inserted therein. The connection device 100 connects a nozzle 310 via a supply hose 300 .

[0011] Syringe 200 The syringe 200 contains the paste. Syringe 200 has a cylindrical body. The syringe 200 has a discharge port 210 at the tip for discharging the paste. The front of the syringe 200 is inserted into the connection device 100 . A pressure supply cap 230 to which a pressure supply hose 240 is connected is attached to the rear of the syringe 200 .

[0012] ●Feed pressure means The pressure supply cap 230 is a device for pushing out the paste stored in the syringe 200 . The pressure supply hose 240 is an air hose that conveys pressurized air for pushing out the paste stored in the syringe 200 . The end of the pressure supply hose 240 is connected to a pressurizer 250 .

[0013] Paste The paste is the ink used for printing in a screen printing device. The paste may be a conductive paste, an insulating paste, or a resistive paste. The viscosity of the paste is 10 Pa·s (Pascal seconds) or more and 100 Pa·s or less at a temperature of 20°C or more and 30°C or less. Furthermore, the viscosity of the paste is preferably 20 Pa·s or more and 70 Pa·s or less. Furthermore, the viscosity of the paste is preferably 30 Pa·s or more and 40 Pa·s or less.

[0014] ●Supply means The supply hose 300 is a tube that conveys the paste from the syringe 200 to the nozzle 310 . The nozzle 310 ejects the paste. The nozzle 310 is disposed in the filling head of a vacuum filling device or in the filling head of a vacuum screen printing device.

[0015] Pressure reduction means The connection device 1 is connected to a pressure reducer 400 via a suction hose 410 . The suction hose 410 is a tube that sucks air from inside the connection device 1. The pressure reducer 400 sucks the air inside the suction hose 410 to reduce the pressure inside the connection device 1 .

[0016] Connection device 100 (Figs. 3 and 4) FIG. 3 is an end view of the connection device 100 according to the first embodiment and a cross-sectional view of the connection device 100. FIG. In FIG. 3, the syringe 200 is not shown. 3, (a) is an end view taken along line AA in FIG. 1, and (b) is a cross-sectional view taken along line BB in FIG. FIG. 4 is an exploded perspective view of the connection device 100 according to the first embodiment.

[0017] ●Connection device 100 The connection device 100 includes a container 90, an annular ring 40, and connection ports 24 and 26.

[0018] ●Container 90 The container 90 has one body 10, one back panel 20, and two transparent panels 30. The container 90 is a housing that assumes the external shape of the connection device 100 . The container 90 is in communication with the outside air only through the insertion opening 12, the attachment opening 22, and the suction opening 28.

[0019] The container 90 has the following six sides: 1. The front side where the syringe 200 is inserted; 2. A back surface formed by a back plate 20; 3. Two sides to which the transparent plate 30 is fixed; 4. Top and bottom.

[0020] ●Body 10● The body 10 has a hexahedral shape. The body 10 has a cylindrical space that serves as an interior space 18 . The cylindrical space of the body 10 is a through-hole formed in the center of two opposing faces of a cubic metal block. The body 10 has an insertion opening 12 , an opening window 14 , and an annular groove 16 .

[0021] The insertion port 12 is a circular opening into which the syringe 200 is inserted. The insertion opening 12 is formed by tapering one end of the internal space 18 . The inner diameter of the insertion port 12 is the same as the outer diameter of the syringe 200 . The inner diameter of the insertion port 12 may be larger than the outer diameter of the syringe 200 .

[0022] The opening window 14 is a rectangular space through which the internal space 18 of the body 10 can be seen. The opening window 14 is a hole formed in the diameter direction of the internal space 18 . The open window 14 is a rectangular through-hole that opens perpendicular to the central axis C of the internal space 18 that passes through the body 10.

[0023] ●Transparent plate 30● The transparent plate 30 is a rectangular transparent plate. The transparent plate 30 is in close contact with the outer surface of the body 10 and covers the opening window 14 . The interior space 18 can be seen through the transparent plate 30.

[0024] ●Annular groove 16● The annular groove 16 is disposed near the insertion opening 12 . The annular groove 16 is formed on the inner peripheral surface of the internal space 18 . The annular groove 16 is an annular groove having a concave cross section.

[0025] ●Annular ring 40● The annular ring 40 is an O-ring that fits into the annular groove 16 . The inner diameter of the annular ring 40 is smaller than the outer diameter of the syringe 200 . The syringe 200 is inserted into the annular ring 40 in a tight contact state. The annular ring 40 seals the interior space 18 upon insertion of the syringe 200 . The annular ring 40 keeps the interior space 18 airtight. The annular ring 40 is preferably an O-ring specified for vacuum flanges by the JIS standard (JIS B2401). The material of the annular ring 40 is preferably rubber, and preferably fluororubber or nitrile rubber.

[0026] ●Backboard 20● The back plate 20 is a rectangular metal plate. The back plate 20 is a plate that is in close contact with the surface of the body portion 10 opposite to the surface on which the insertion opening 12 is formed. The back plate 20 is a plate that covers the end face of the internal space 18 . The back plate 20 has an attachment opening 22 and a suction opening 28 .

[0027] ●Mounting port 22● The mounting opening 22 is a through-hole that passes through the center of the back plate 20 . The central axis of the mounting port 22 is the same as the central axis C of the internal space 18 . The attachment port 22 is a delivery port for attaching the supply hose 300 and delivering paste to the supply hose 300 . A connection port 24 is fixed to the inside of the mounting port 22 . An external port 26 communicating with the connection port 24 is fixed to the external side of the mounting port 22 .

[0028] ●Connection port 24● One end of the connection port 24 is fixed to the inside of the mounting port 22 and the other end is connected to the discharge port 210 . A male-to-male type thread conversion joint is suitable for the connection port 24. The male thread to which the discharge port 210 is fixed is a tapered pipe thread which increases airtightness. The discharge port 210 has an internal thread 220 on its inner circumferential surface. The internal thread 220 is a parallel pipe thread.

[0029] ●External port 26● The external port 26 has one end fixed to the outside of the mounting port 22 and the other end connected to a supply hose 300 . The external port 26 is preferably an elbow or L-shaped joint.

[0030] ●Suction port 28● The suction port 28 is a through-hole that penetrates the back plate 20 . The suction port 28 is a through-hole for attaching a suction hose 410 to suck air 910 from the internal space 18 . The suction port 28 communicates with the interior space 18 .

[0031] ●Internal space 18● The internal space 18 is a sealed space that is sealed by the body 10 , the back plate 20 , the transparent plate 30 , the annular ring 40 and the syringe 200 . The internal space 18 becomes a sealed space when the syringe 200 is inserted into the annular ring 40 . The internal space 18 is decompressed by the pressure reducer 400 to become a decompressed space 930 . ●Paste supply route● The paste supply path is as follows: 1, 200 syringes, 2.Discharge port 210, 3. Connection port 24, 4. Mounting port 22, 5. External port 26, 6. Supply hose 300, 7. Nozzle 310.

[0032] ●Features of the connection device 100● The connection device 100 connects a syringe 200 having a discharge port 210 to a supply hose 300 . The connection device 100 is a suction port 28 for sucking air 910 from the internal space 18 of the connection device 100; an insertion port 12 for inserting a syringe 200; a mounting port 22 for mounting the supply hose 300 and the discharge port 210; It has.

[0033] The insertion port 12 is attached so that the syringe 200 can be inserted and removed. By inserting the syringe 200 through the insertion port 12, the syringe 200 and the supply hose 300 can be connected. When the syringe 200 is inserted through the insertion port 12 , the internal space 18 of the connection device 100 is sealed by the syringe 200 .

[0034] The insertion port 12 is attached so that the syringe 200 can be inserted and rotated. Syringe 200 is inserted and rotated to connect syringe 200 to supply hose 300 .

[0035] The insertion slot 12 is an opening provided on one surface of the connection device 100 . The insertion opening 12 has an annular groove 16 formed on the inner periphery of an internal space 18 . The annular ring 40 is fitted into the annular groove 16 . The annular ring 40 fits tightly against the cylindrical outer periphery of the syringe 200 .

[0036] The attachment port 22 is a connection port 24 disposed inside the connection device 100 and connected to the syringe 200; an external port 26 disposed outside the connection device 100 and for connecting a supply hose 300; Attach.

[0037] The connection device 100 has an opening window 14 through which the interior space 18 of the connection device 100 can be seen. The connection device 100 has a transparent plate 30 that covers the opening window 14 and seals the opening window 14 .

[0038] Syringe 200 contains the paste used for printing in a screen printing machine. A supply hose 300 supplies the paste to the screen printing device.

[0039] ●How to connect the connection device 100● A method of connecting syringe 200 and supply hose 300 using connection device 100 will be described with reference to FIGS. Here, a case where a new syringe 200 is connected to an existing supply hose 300 will be described.

[0040] ● Insertion process (Fig. 5) FIG. 5 is a diagram showing the syringe 200 before it is inserted into the insertion port 12. In FIG. When replacing the syringe 200, the following conditions are assumed to be met beforehand. 1. The supply hose 300 remains attached to the attachment port 22. The paste 92 in the hose that was supplied from the syringe 200 before replacement remains in the supply hose 300. The connection port 24 is not filled with the paste 92 inside the hose, and air 910 exists at the tip of the connection port 24 . 2. A pressure reducer 400 is attached to the suction port 28 via a suction hose 410 . The pressure reducer 400 is not operational at this point.

[0041] In the state shown in FIG. 5, the syringe 200 is inserted through the insertion port 12. The entire outer periphery of the syringe 200 comes into contact with the entire inner periphery of the annular ring 40 . Furthermore, the syringe 200 is inserted, the annular ring 40 is deformed, and the entire outer periphery of the syringe 200 is brought into close contact with the entire inner periphery of the annular ring 40 . Furthermore, the syringe 200 is inserted in a state where the syringe 200 is in close contact with the annular ring 40 . The repulsive force of the annular ring 40 brings the syringe 200, the annular ring 40 and the annular groove 16 into close contact with each other, making the internal space 18 an airtight space. The internal space 18 is covered by the body 10, the back plate 20, the transparent plate 30, the annular ring 40, and the syringe 200, forming a completely closed space. This results in the state shown in Figure 6.

[0042] ●Suction process after insertion (Figure 6) With syringe 200 inserted through insertion port 12 in FIG. 6, air is sucked from internal space 18 through suction port 28 by suction hose 410 to reduce the pressure in internal space 18 of connection device 100. The pressure reducer 400 evacuates the interior space 18 . A vacuum is a space filled with gas at a pressure lower than normal atmospheric pressure. The internal space 18 becomes a reduced pressure space 930 . The internal space 18 is an airtight space and therefore cannot allow outside air to enter. The air 910 at the discharge port 210 is sucked in, and the pressure inside the discharge port 210 is reduced, so that the paste 91 in the syringe moves to the discharge port 210 .

[0043] Similarly, the air 910 in the connection port 24 is sucked in, and the pressure inside the connection port 24 is reduced, so that the paste 92 in the hose moves to the connection port 24 .

[0044] ●Connection process after suction (Figure 7) In this way, as shown in FIG. 7, paste 91 in the syringe emerges from discharge port 210 with a curved surface 920 present. 7, the paste 92 in the hose emerges from the connection port 24 with a curved surface 920.

[0045] Although not shown, there may be a difference between the time when the paste 91 in the syringe reaches the discharge port 210 and the time when the paste 92 in the hose reaches the connection port 24 . As long as curved surface 920 is formed on at least one side, syringe 200 may be further inserted into connecting device 100 to connect syringe 200 to mounting port 22 .

[0046] Although not shown, there may be a case where neither the paste 91 in the syringe reaches the discharge port 210 nor the paste 92 in the hose reaches the connection port 24 . In both cases, even when curved surface 920 is not formed, syringe 200 may be further inserted into connection device 100 to connect syringe 200 to attachment port 22 .

[0047] First, the syringe 200 is inserted linearly until the discharge port 210 comes into contact with the connection port 24 . Next, after the discharge port 210 comes into contact with the connection port 24, the syringe 200 is rotated, whereby the female thread 220 of the discharge port 210 and the male thread 25 of the connection port 24 are screwed together. Since the male thread 25 of the connection port 24 is a tapered thread, the more the syringe 200 is rotated, the closer the discharge port 210 and the connection port 24 come into close contact with each other.

[0048] ●Decompression recovery process after connection (Fig. 8) In this way, the discharge port 210 and the connection port 24 in FIG. 8 are screwed together. After the screws are fastened, the pressure reducer 400 is stopped to restore the pressure in the internal space 18 to the pressure before suction. As a result, the internal space 18 changes from a reduced pressure space 930 to an atmospheric pressure space. Even if a space remains between the paste 91 in the syringe and the paste 92 in the hose when they are connected, the remaining space is a decompressed space, so by bringing the pressure in the internal space 18 to atmospheric pressure, the remaining space shrinks and disappears due to atmospheric pressure. In FIG. 8, the paste 91 in the syringe and the paste 92 in the hose are continuous, and there is no air 910 between them. Thereafter, even if the paste 91 in the syringe is pushed out from the syringe 200 by the pressurizer 250, the air 910 is not discharged from the nozzle 310.

[0049] Example: Hereinafter, examples 1 to 6 will be described with reference to FIG. The pressures described below are gauge pressures, with atmospheric pressure being 0 Pascals (Pa). In Examples 1 to 6, the specifications are as follows: Pressure Reducer 400: Vacuum pump with a capacity of 12 L / min. Supply hose 300: diameter 10mm, inner diameter 6.5mm. Connection port 24: The male thread connecting the discharge port 210 is a pipe taper thread based on NPT1 / 4 (National Pipe Taper 1 / 4). The inner diameter is 6.5 mm. The female thread 220 connecting the discharge port 210 and the connection port 24 is a parallel pipe thread. The inner diameter is 11.0 mm. Feed pressure cap 230: Manufactured by Musashi Engineering Co., Ltd. Pressure machine 250: Adjustable in the range of 0.1MPa to 0.4MPa. Pressure is 0.1MPa. Viscosity of paste 91 in syringe 200: 35 Pa·s.

[0050] Example 1 Decompression value: Air 910 is sucked in through the suction port 28 to reduce the pressure in the internal space 18 of the connection device 100 to -5 kPa. Connection method: Before the paste reached the tip of the discharge port 210 and the tip of the connection port 24, the syringe 200 and the attachment port 22 were connected. Result: Because the decompression force was weak, even after waiting, the paste did not reach the tip of the discharge port 210 and the tip of the connection port 24. When the syringe 200 and the attachment port 22 were connected in this state, air 910 remained.

[0051] Example 2 Decompression value: Air 910 is sucked in through the suction port 28 to reduce the pressure in the internal space 18 of the connection device 100 to -10 kPa. Connection method: Before the paste reached the tip of the discharge port 210 and the tip of the connection port 24, the syringe 200 and the attachment port 22 were connected. Result: 910% air remained.

[0052] Example 3 Decompression value: Air 910 is sucked in through the suction port 28 to reduce the pressure in the internal space 18 of the connection device 100 to -10 kPa. Connection method: After the paste reached the tip of the discharge port 210 and the tip of the connection port 24, the syringe 200 and the attachment port 22 were connected. Result: 910% of air was removed.

[0053] Example 4 Decompression value: Air 910 is sucked in through the suction port 28 to reduce the pressure in the internal space 18 of the connection device 100 to -15 kPa. Connection method: Before the paste reached the tip of the discharge port 210 and the tip of the connection port 24, the syringe 200 and the attachment port 22 were connected. Result: 910% of air was removed.

[0054] Example 5 Decompression value: Air 910 is sucked in through the suction port 28 to reduce the pressure in the internal space 18 of the connection device 100 to -15 kPa. Connection method: After the paste reached the tip of the discharge port 210 and the tip of the connection port 24, the syringe 200 and the attachment port 22 were connected. Result: 910% of air was removed.

[0055] Example 6 Decompression value: Air 910 is sucked in through the suction port 28 to reduce the pressure in the internal space 18 of the connection device 100 to -20 kPa. Connection method: After the paste reached the tip of the discharge port 210 and the tip of the connection port 24, the syringe 200 and the attachment port 22 were connected. Result: Air 910 was successfully removed. However, due to the strong decompression force, the suction force became strong, and the paste immediately overflowed from the tip of the discharge port 210 and the tip of the connection port 24 and was discharged into the internal space 18.

[0056] The above examples reveal the following. In Examples 3, 4, 5, and 6, it is possible to prevent air from entering the paste supply path. Therefore, in order to remove the air 910, it is preferable to suck the air 910 through the suction port 28 and reduce the pressure in the internal space 18 of the connection device 100 to -20 kPa or more and -10 kPa or less.

[0057] In the case of Example 3, air was observed to be mixed in depending on the connection conditions. In the case of Example 6, the paste overflows into the internal space 18, resulting in waste of the paste. Therefore, the connection at a vacuum degree of -15 kPa in Examples 4 and 5 is preferable.

[0058] As described above, it is preferable to suck air 910 from suction port 28 to reduce the pressure in internal space 18 of connection device 100 to −15 kPa. If the pressure is reduced to −15 kPa, air 910 can be removed even before the paste reaches both the tip of discharge port 210 and the tip of connection port 24. Therefore, syringe 200 and attachment port 22 can be connected without waiting for the paste to reach the tip of discharge port 210 and the tip of connection port 24. The reason why the air 910 can be removed even before the paste reaches the tip of the discharge port 210 and the tip of the connection port 24 is that the air in the internal space 18 is discharged at a reduced pressure of -15 kPa, and the internal space 18 becomes a vacuum. Therefore, when the pressure reduction indication by the pressure reducer 400 reaches -15 kPa, the connection between the discharge outlet 210 and the connection port 24 can be started even before the paste reaches either or both of the tip of the discharge outlet 210 and the tip of the connection port 24. Furthermore, even if the pressure is maintained at -15 kPa and the paste leaks out from the tip of the discharge port 210 or the tip of the connection port 24 into the internal space 18, the inner surface of the internal space 18 will simply become contaminated with paste, and the air 910 can be removed.

[0059] In this example, the viscosity of the paste 91 in the syringe 200 is 35 Pa·s. However, the viscosity is not constant depending on the syringe 200. Also, the viscosity of the paste 92 in the supply hose 300 is not necessarily 35 Pa·s. The viscosity changes depending on the temperature, humidity, time, and environment. The results of this example can be considered to be applicable not only to the viscosity of 35 Pa·s used in this example, but also to at least a range of plus or minus 20% to 30% of 35 Pa·s. The range of plus or minus 20% of 35 Pa·s is 28.0 Pa·s or more and 42 Pa·s or less. The range of plus or minus 30% of 35 Pa·s is between 24.5 Pa·s and 44.5 Pa·s.

[0060] Effect of the first embodiment The interior space 18 is connected to a vacuum, so that air can be removed from the paste.

[0061] The opening window 14 allows the connection port 24 and the discharge port 210 to be connected while being visually observed.

[0062] Other configuration examples of the first embodiment The body 10 may be formed from a plurality of metal plates. The body 10 and back panel 20 may be made in one piece. The body 10 and back panel 20 do not have to be made of metal. The body 10 and back panel 20 may be made of resin or glass.

[0063] The internal space 18 may be any space into which the syringe 200 can be inserted. The interior space 18 does not have to be cylindrical.

[0064] Syringe 200 does not have to be cylindrical. If syringe 200 has a cylindrical portion that can be inserted into insertion port 12 when insertion port 12 is circular, the other portions do not need to be cylindrical. Syringe 200 may have a hexahedral shape that can be inserted into insertion port 12 when insertion port 12 is rectangular rather than circular. The syringe 200 may also be called a cartridge. The viscosity of the paste stored in syringe 200 may be such that curved surfaces 920 can be formed at connection port 24 and discharge port 210 due to surface tension.

[0065] There may be one or more opening windows 14. The opening window 14 may be omitted.

[0066] The suction port 28 does not have to be on the back panel 20 . The suction port 28 may be located in the body 10 . The suction port 28 may be in communication with the internal space 18 .

[0067] There may be two or more annular rings 40. If a vacuum can be generated by the annular ring 40, the inner diameter of the insertion port 12 and the outer diameter of the syringe 200 do not need to be the same. If a vacuum can be generated by the annular ring 40, the shape of the insertion port 12 and the cross-sectional shape of the syringe 200 do not have to be circular. If a vacuum can be generated without the annular ring 40, the annular ring 40 and the annular groove 16 may be omitted. By making the diameter of the annular ring 40 larger than the depth of the annular groove 16, a syringe 200 having a small diameter can be connected. By changing the cross-sectional shape of the annular ring 40, syringes 200 having different diameters can be connected.

[0068] The connection port 24 and the external port 26 may be made in one part. The back plate 20, the connection port 24 and the external port 26 may be made as one part. If the mounting port 22 of the back plate 20 can be directly connected to the discharge port 210, the connection port 24 may be omitted. If the mounting port 22 of the back panel 20 can be directly connected to the supply hose 300, the external port 26 may be omitted. The supply hose 300 may be passed through the attachment port 22 and drawn into the internal space 18, and the discharge port 210 and the supply hose 300 may be directly connected.

[0069] The connection method between the connection port 24 and the discharge port 210 does not have to be a screw fastening method. The connection port 24 and the discharge port 210 may be connected by an insertion method, a crimping method, or a hooking method. The connection device 100 may be installed upside down or left to right. The installation of the connection device 100 may be at an angle.

[0070] The body 10 may be provided with a pressure measuring instrument for measuring the degree of vacuum in the internal space 18 . As described above, if the reduced pressure state of −15 kPa is maintained, there is a possibility that the paste will leak into the internal space 18 from the tip of the discharge port 210 and the tip of the connection port 24 . Therefore, after the pressure gauge indicates a pressure reading of -15 kPa, the tip of the discharge port 210 and the tip of the connection port 24 are quickly brought into contact with each other to initiate connection between them.

[0071] A syringe drive unit that holds and drives the syringe 200 may be provided. The syringe drive unit inserts the syringe 200 into the connection device 100 . The syringe driver detects when the interior space 18 is at the desired pressure. The syringe driving unit inserts the syringe 200 into the connection device 100 until the connection port 24 and the discharge port 210 come into contact with each other. The syringe drive rotates and screws the syringe 200 . When the syringe 200 is to be removed, the syringe driving unit rotates the syringe 200 in the reverse direction, and then pulls the syringe 200 out of the connection device 100 . If a syringe drive unit is available, automatic connection becomes possible.

[0072] If the paste 91 in the syringe does not move to the discharge port 210 even when the internal space 18 is decompressed, a pressure may be applied to the paste 91 in the syringe by a pressurizer 250 . When pressurizing the air in the pressure supply hose 240 by the pressurizer 250, the pressure is set to a level that prevents the paste 92 in the hose from being discharged from the discharge port 210.

[0073] The paste is not limited to ink used in vacuum hole filling or vacuum screen printing machines. The paste may be any ink that is used for printing with a screen printing device. The paste may be any ink used in printing. The paste may be any viscous fluid. The connection device 100 can be used with any paste or viscous fluid by adapting the pressure of the interior space to the viscosity of the paste or viscous fluid.

[0074] ●Embodiment 2 In the second embodiment, differences from the first embodiment will be described. FIG. 10 is an exploded perspective view of the connection device 100 according to the second embodiment. FIG. 10 differs from FIG. 4 in that front plates 50 and 51 are provided.

[0075] The front plates 50 and 51 are rectangular metal plates having the same outer shape. The front plates 50 and 51 have an insertion opening 12 and an annular groove 16 in the center. The insertion opening 12 of the front plate 50 and the insertion opening 12 of the front plate 51 have different diameters. The annular ring 40 used has a diameter that matches the diameter of the annular groove 16 of the front plate 50 and the front plate 51 . The body 10 has an internal space 18 having a diameter equal to or larger than the diameter of the insertion opening 12 of the front plate 50 and the diameter of the insertion opening 12 of the front plate 51 . The front panel 50 and the front panel 51 of the body 10 can be attached and detached interchangeably.

[0076] Effect of the second embodiment The connecting device 100 can connect syringes 200 of different diameters by simply replacing the front plate and the annular ring.

[0077] Other configuration examples of the second embodiment The front plate may be made of rubber or resin. If the front plate is made of rubber or resin and the insertion port 12 and the syringe 200 can be directly and tightly attached to each other, the annular ring 40 may be omitted. [Explanation of symbols]

[0078] 10 body, 12 insertion port, 14 opening window, 16 annular groove, 18 internal space, 20 back plate, 22 mounting port, 24 connection port, 25 male thread, 26 external port, 28 suction port, 30 transparent plate, 40 annular ring, 50 front plate, 51 front plate, 90 container, 91 paste in syringe, 92 paste in hose, 100 connection device, 200 syringe, 210 discharge port, 220 female thread, 230 feed pressure cap, 240 feed pressure hose, 250 pressure generator, 300 supply hose, 310 nozzle, 400 pressure reducer, 410 suction hose, 910 air, 920 curved surface, 930 reduced pressure space.

Claims

1. A connection device that connects a syringe having a discharge port to a supply hose, a suction port for sucking air from an internal space of the connection device; an insertion port for inserting the syringe; a connection port for connecting the supply hose to the discharge port; A connection device having:

2. the insertion port is attached so that the syringe can be inserted and removed; The connection device according to claim 1 , wherein the syringe is inserted through the insertion opening, thereby sealing the internal space of the connection device with the syringe.

3. the insertion port is configured to mount the syringe insertably and rotatably; 2. The connection device according to claim 1, wherein the syringe and the supply hose are connected by inserting and rotating the syringe.

4. the insertion port is an opening provided on one surface of the connection device, 2. The connecting device according to claim 1, wherein the insertion port has an annular groove into which an annular ring that fits tightly onto the syringe is fitted.

5. The mounting port is a connection port for connecting the syringe; an external port for connecting the supply hose; The connection device according to any one of claims 1 to 4, wherein the connection device is attached to the

6. an opening window through which the internal space can be viewed; a transparent plate covering the opening window; 5. The connection device according to claim 1, further comprising:

7. 5. The connection device according to claim 1, wherein the syringe contains a paste, and the supply hose supplies the paste.

8. 8. The connection device according to claim 7, wherein when the viscosity of the paste is 24.5 Pa·s or more and 44.5 Pa·s or less, air is sucked through the suction port to reduce the pressure in the internal space of the connection device to -20 kPa or more and -10 kPa or less.

9. 8. The connection device according to claim 7, wherein when the viscosity of the paste is 24.5 Pa·s or more and 44.5 Pa·s or less, the pressure in the internal space of the connection device is reduced to −15 kPa by sucking air through the suction port.

10. A method for connecting a syringe and a supply hose using a connection device having a suction port, an insertion port, and an attachment port, comprising: A supply hose is attached to the attachment port, and the syringe is inserted through the insertion port. With the syringe inserted through the insertion port, air is sucked through the suction port to reduce the pressure in the internal space of the connection device; A connection method for connecting the syringe and the attachment port while the internal space of the connection device is decompressed.

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