JPH067872U - Residual amount detection mechanism of fluid supply device - Google Patents

Abstract

(57) [Abstract] [Purpose] To make it possible to easily adjust the remaining amount detection level of the fluid supply device with high accuracy and reduce the volume occupied by the level adjustment mechanism. [Composition] Fluid (17) housed in syringe (3)
The compressed air with compressed air and the outlet of the syringe (5)
A holder (1) for accommodating the syringe movably in the height direction and a holder (1) for movably moving the syringe in the height direction, which is a remaining amount detection mechanism of a fluid supply device supplied to the outside from a level surface of the fluid. Proximity sensor (23) which is fixed at a predetermined position of the holder and moves from the outside of the syringe, the plunger (19) moving according to the movement.
A cap (11) which is screwed to the lower part of the holder and regulates the downward movement of the syringe; and a cap (11) which is inserted into a screwed part between the cap and the holder to adjust the height of the syringe. Spacer (29). The relative height between the proximity sensor and the syringe is adjusted by changing the thickness of the spacer.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a remaining amount detecting mechanism of a fluid supply device, for example, to a technique for accurately detecting a remaining amount of the resin used in a device for supplying a resin for coating the surface of a hybrid IC device. .

[0002]

[Prior art]

 For example, in the manufacturing process of so-called chip-on-board (COB) products such as hybrid IC devices, there is a process for coating the surface of a ceramic substrate on which semiconductor chips and other parts are mounted with resin to protect the surface. is there. The resin used for such a coating is, for example, a black opaque fluid, which is filled in a predetermined volume of syringe, ie a syringe. Then, such a fluid resin is pressurized by compressed air and is applied to a predetermined portion on the ceramic substrate through a needle provided at the outlet of the syringe.

The remaining amount of such chip coat resin in the syringe has been conventionally detected by a mechanism as shown in FIGS. 2 (a) and 2 (b), for example. That is, the metal float 107 is placed on the upper surface of the chip coating resin 103 housed in the syringe 101, and the height of the float 107 is detected by, for example, a flat metal sensor 111. Reference numeral 105 is a cap having an air introduction opening for supplying compressed air into the syringe 101.

Such a flat metal sensor 111 is fixed to a long hole 113 provided in the bracket 109 with a fixing screw 115. Then, it was possible to loosen the fixing screw 115 and move the metal sensor 111 up and down along the elongated hole 113, whereby the detection level of the remaining amount of the resin for chip coating could be adjusted.

[0005]

[Problems to be solved by the device]

 However, in the resin residual amount detection mechanism as described above, a height adjustment mechanism that occupies a relatively large volume must be provided on the outer peripheral portion of the syringe, and especially a tip coat resin that requires heating or heat retention. When it is used, it is necessary to provide a heater on the outer peripheral portion of the syringe, and it is very difficult to provide the height adjusting mechanism and the heater together on the outer peripheral portion of the syringe in terms of space.

In view of the above-mentioned problems in the conventional device, an object of the present invention is to detect the remaining amount of the fluid in the remaining amount detection mechanism of the fluid supply device without occupying a large volume of the outer peripheral portion of the syringe. It is to be able to easily adjust the level.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, there is provided a residual amount detecting mechanism of a fluid supply device which pressurizes a fluid contained in a syringe with compressed air and supplies the fluid from an outlet of the syringe to the outside. The remaining amount detecting mechanism includes a holder for accommodating the syringe movably in the height direction, a plunger inserted in the syringe and moving according to the movement of the level surface of the fluid, and a holder for the holder. A detection sensor that is fixed at a predetermined position and that detects the position of the plunger from outside the syringe; a cap that is screwed to the lower part of the holder and that restricts downward movement of the syringe; and the cap and the holder. It is characterized in that it is provided with a spacer that is inserted into a screwed portion and adjusts the height of the syringe.

It is convenient that the plunger is formed of a metal member, or a metal member is added to the plunger, and the proximity sensor is a metal sensor that detects the position of the metal member.

[0009]

[Action]

 In the above structure, the plunger is located on the level surface of the fluid and is pressed by the compressed air supplied from the outside to eject the fluid from the outlet of the syringe to the outside. Then, when the level surface of the fluid inside the syringe moves due to the discharge of the fluid, the plunger also moves inside the syringe according to this movement. Therefore, by detecting the position of the plunger from the outside of the syringe with the proximity sensor, it is possible to accurately know the remaining amount of the flow conductor in the syringe.

Then, by changing the thickness of the spacer inserted in the screwed portion between the cap and the holder, the relative height of the syringe with respect to the holder is adjusted, so that the distance between the proximity sensor and the syringe is adjusted. The relative height of can be adjusted. With this configuration, a cylindrical metal sensor that has higher operation stability than a flat metal sensor can be used as the proximity sensor, and this cylindrical metal sensor occupies a small volume in the outer peripheral portion of the syringe. Therefore, there is no obstacle when a heater for heating is provided on the outer peripheral portion of the syringe.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows a remaining amount detecting mechanism of a fluid supply device according to an embodiment of the present invention. The apparatus shown in the figure comprises a syringe 3 vertically arranged in a holder 1. A needle 9 is connected to a discharge port 5 at the bottom of the syringe 3 via a dripping prevention valve 7. Also, the needle 9 is positioned by a needle fixing cap 11. Then, the flange portion 31 of the needle 9 abuts on the inner bottom surface of the cap 11, whereby the positions of the needle 9 and the syringe 3 in the vertical direction are regulated. The cap 11 is screwed to the lower portion of the holder 1, and a spacer 29 is inserted in the screwed portion between the cap 11 and the holder 1.

The upper part of the syringe 3 is closed by a removable adapter 13, and the adapter 13 has an air introduction opening 15 connected to a compressed air supply device (not shown).

The syringe 3 contains, for example, the above-mentioned tip coat resin 17, and a plunger 19 is placed on the tip coat resin 17, and the plunger 19 is mounted on the tip coat resin 17. It moves according to the movement of the level surface. Compressed air will be supplied to the space inside the syringe 3 above the plunger 19.

Further, a metal strip 21 such as an aluminum tape is wound and adhered on the outside of the cylindrical surface of the plunger 19. A cylindrical metal sensor 23 is attached to the holder 1 and detects the proximity of the metal strip 21 added to the plunger 19. An alarm circuit 25 is connected to the metal sensor 23. A heater 27 for heating the resin in the syringe 3 is provided outside the holder 1.

In the device of FIG. 1, the plunger 19 is pressed downward by the compressed air supplied from the compressed air supply device (not shown) into the syringe 3 through the opening 15 of the adapter 13, and the lower portion of the plunger 19 is pressed. The tip coat resin 17 in the above is supplied to the outside through the liquid stop valve 5 and the needle 9. As a result, for example, a predetermined portion on the ceramic substrate of the hybrid IC device can be coated to perform the surface protection treatment. Further, the heater 27 keeps the chip coat resin 17 at an appropriate temperature.

Further, in such an operation, the tip coat resin 17 in the syringe 3 is discharged to the outside, the remaining amount of the tip coat resin is gradually reduced, and the plunger 19 is also lowered. Then, when the remaining amount of the chip coat resin 17 becomes small and the plunger 19 descends to the position shown in FIG. 1, for example, the metal sensor 23 detects the proximity of the metal strip 21 wound around the plunger 19 and makes a predetermined detection. The signal is input to the alarm circuit 25. As a result, the alarm circuit 25 performs an operation such as generating an alarm sound with a buzzer (not shown) or blinking an alarm light. Further, it is possible to output a stop command signal so that the manufacturing line automatically stops. Such operation of the alarm circuit can be realized, for example, by incorporating a microcomputer in the alarm circuit 25 and programming the microcomputer to perform such operation.

Further, in the above device, the relative height of the syringe 3 with respect to the holder 1 can be changed by changing the thickness of the spacer 29 inserted between the cap 11 for positioning the needle 9 and the holder 1. Therefore, the positional relationship between the syringe 3 and the metal sensor 23 can be adjusted. Thereby, the detection level of the residual resin amount in the syringe 3 can be adjusted. Although the cap 11 indicates the flange portion 31 of the needle 9 in the embodiment of FIG. 1, the cap 11 may be configured to directly indicate the lower portion of the syringe 3, for example.

[0018]

[Effect of device]

 As described above, according to the present invention, the detection level of the remaining amount of resin in the fluid supply device can be adjusted properly and freely with a simple device configuration. In addition, since the resin residual amount detection level adjustment mechanism is not located on the outer circumference of the syringe, a heater for heating or heat retention is provided on the outer circumference of the syringe in combination with the use of a small cylindrical metal sensor on the outer circumference of the syringe. It becomes possible to dispose properly.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing a schematic configuration of a remaining amount detecting mechanism of a fluid supply device according to an embodiment of the present invention.

FIG. 2 is an explanatory front view (a) and a side view (b) showing a schematic configuration of a remaining amount detecting mechanism of a conventional fluid supply device.

[Explanation of symbols]

 1 Holder 3 Syringe 5 Discharge Port 7 Drip Prevention Valve 9 Needle 11 Cap 13 Adapter 15 Air Inlet 17 Chip Coat Resin 19 Plunger 21 Metal Strip 23 Metal Sensor 25 Alarm Circuit 27 Heater 29 Spacer 31 Flange Part

Claims (2)

[Scope of utility model registration request] 1. A remaining amount detecting mechanism of a fluid supply device which pressurizes a fluid contained in a syringe with compressed air and supplies the fluid from an outlet of the syringe to the outside, wherein the syringe is moved in a height direction. A holder that can be accommodated, a plunger that is inserted into the syringe and moves according to the movement on the level surface of the fluid, and a fixed position of the holder that detects the position of the plunger from outside the syringe. A proximity sensor, a cap screwed to the lower portion of the holder to restrict downward movement of the syringe, and inserted into a screwed portion between the cap and the holder,
A spacer for adjusting the height of the syringe; and a relative height between the proximity sensor and the syringe can be adjusted by changing the thickness of the spacer. Remaining amount detection mechanism of body feeding device. 2. The plunger is formed of a metal member, or a metal member is added to the plunger,
The remaining amount detection mechanism of the fluid supply device according to claim 1, wherein the proximity sensor is a metal sensor that detects the position of the metal member.