JPH0621741U - Small amount dispenser for liquid chemicals - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a small amount dispensing device for liquid agents or the like that is easy to handle and that can accurately control the dispensing amount. A liquid agent container 6 filled with a liquid agent or the like to be discharged and whose volume is reduced by an external pressure is housed in a pressure container to which a liquid for pressurizing the liquid agent container 6 is connected. The pressure container includes a container body 3 and a face plate 4. An arbitrary amount of liquid for pressurization is delivered by the pump 1 to the pressurized container, whereby an arbitrary amount of liquid agent is discharged from the discharge tube 20 connected to the discharge port of the liquid agent container 6 for guiding the liquid agent and the like to the outside. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, a liquid such as an adhesive for bonding or fixing parts or necessary chemicals (hereinafter referred to as liquid agent) is continuously discharged to a certain minute amount and supplied in the process of manufacturing mass-produced products. The present invention relates to a micro-dispensing device for liquid agents and the like that is suitable for.

[0002]

[Problems to be solved by conventional techniques and devices]

 Various adhesives, such as glue, solder resist, lubricating oil, anaerobic solvent, and acrylic cyanide, are used to bond or fix parts in the above-mentioned mass production process. A tubing system is known in which a tube is used as a minute amount discharging device for the liquid agent and the like, and a predetermined liquid agent reservoir is mechanically formed inside the tube and sequentially discharged. This method is the only method that is practically used to discharge instant adhesive, which is an anaerobic solvent. It is easy to handle, but the same place on the tube is repeatedly pressed by rollers, etc., so if the tube becomes fatigued, the stability of the tube will decrease and the discharge accuracy will decrease. Therefore, the complicated work of moving the compression part of the tube at any time is required. Also known is a so-called syringe type minute amount dispenser for liquid chemicals, which uses a piston and a cylinder. In this method, metal such as stainless steel or glass is used as the material of the syringe, and an O-ring is used to maintain the airtightness of the sliding portion between the piston and the cylinder. This O-ring cannot be used when the liquid or the like is an anaerobic instant adhesive because the O-ring may be worn and mixed with the liquid or the like. In addition, it is not easy to change the discharge liquid and clean the device when not in use. There is known an air pressure feeding method (indirect method) in which a tube-containing liquid agent or the like is compressed by air to deform the tube and discharge it. In this method, since the liquid agent is pushed out from the original tube, there is no problem even if it is an anaerobic liquid agent, and it is sufficient to discard the used tube and use a new one. Therefore, there is no need for cleaning. However, when the pumping pressure becomes high, the air is compressed, and the volume of the air expands due to the temperature of the outside air. Due to these effects, the discharge amount cannot be accurately regulated. An object of the present invention is to provide a small amount dispenser of liquid agent or the like that is easy to handle and that can accurately control the dispensed amount.

[0003]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a micro-dispensing device for a liquid agent or the like according to the present invention comprises a liquid agent container which is filled with a liquid agent or the like to be discharged and whose volume is reduced by an external pressure, and a liquid agent container which accommodates the liquid agent container. A pressurized container for pressurizing the liquid agent container to which a pressurized liquid for pressurizing the liquid container is connected; a discharge tube connected to the discharge port of the liquid agent container for guiding the liquid agent and the like to the outside; and a tank for storing the pressurized liquid. And a pump for delivering an arbitrary amount of the pressurized liquid to the pressurized container.

[0004]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to the drawings showing an embodiment of a micro-dispensing device for liquids and the like according to the present invention. FIG. 1 is a perspective view showing an embodiment of a micro-dispensing device for a liquid agent or the like according to the present invention, and FIG. 2 is a front view of a pressurizing container. FIG. 3 shows a joint portion of the pressure vessel, the liquid agent vessel, and the discharge tube of the apparatus of the above embodiment. In addition, in order to facilitate understanding, a part of the main body of the pressure vessel is cut away in FIG.

As shown in FIG. 2, the liquid agent container 6 has a so-called dropper shape and is formed of an elastic plastic material that is not affected by the liquid agent or the like to be contained. It should be noted that the dropper shape is not always required as long as the internal volume can be easily reduced by the external pressure. It is detachably coupled to the discharge tube 20 at the tip opening 6a. The cross-sectional view of the center of the main body is elliptical, and is flattened by pressure from the outside to reduce the internal volume. The container body 3 of the pressurizing container is provided with an oval recess for accommodating the liquid agent container 6, and an oval groove surrounding the oval recess is provided with the packing 3 arranged therein. The transparent face plate 4 is fixed to the front face with six screws to form a space 7 inside the pressure vessel. At the upper end of the space 7 inside the pressurizing container, an opening hole is provided for introducing a small amount discharge tube 20 such as a liquid agent. A mounting washer 32 that supports the micro-discharging tube 20 is screwed and fixed to the mounting seat 31 at the center of the container body 3 of the pressurized container. A connection portion 19b for connecting the pressurizing liquid transport tube 19 is provided on the left side surface of the pressurized container internal space 7, and an attachment portion 5a of the air vent cock 5 is provided on the right side surface. Water used as a pressurizing liquid is contained in the water tank 2, and is connected to the pump 2 via a pressurizing liquid transporting tube 18 and is connected from the discharge port 19a of the pump 2 to the pressurizing liquid transporting tube 19. Is connected to the internal space 7 of the pressurized container via. The pump 2 is driven by a piezo pump housed in the pump drive unit 10. The piezo pump is a pump that uses a piezo element, and is suitable for controlling a small amount of discharge, and has the advantage that the discharge amount can be adjusted by the number of times the pump is operated. A liquid other than water may be used as the pressurizing liquid, and an electromagnetic solenoid pump or a syringe pump may be used as the pressurizing pump in addition to the piezo pump.

Next, the operation of the device of the embodiment of the minute amount discharging device for the liquid agent or the like having the above-described structure will be described. With the face plate 4 of the pressurizing container removed, the face plate 4 is connected to the discharge tube 20 through the tip opening 6a of the liquid agent container 6 filled with the liquid agent for discharge and the inner container is filled with water. Then, the air bleeding cock 5 is operated to bleed air as necessary. The pump 1 is operated to deliver the water from the tank 2 to the pressurized container. As a result, the liquid agent container 6 is compressed and deformed by the amount of water pumped into the pressurized container space, and is discharged from the discharge tube 20. An operator brings the tip of the discharge tube 20 to a required position and supplies a liquid agent or the like to a required portion.

FIG. 4 shows a modified example of the liquid agent container of the small amount dispenser for liquid agents according to the present invention. The lower end of the liquid agent container 60 is pulled out downward and connected to the cock valve 61. A liquid agent supply tube 62 is connected to the cock valve 61. When replenishing the liquid agent, the cock valve 61 is opened to pump the liquid agent to fill the liquid agent container 60 and close the cock valve 61. Others are the same as the above-mentioned embodiment.

[0008]

[Effect of device]

 As described in detail above, the micro-dispensing device for a liquid agent or the like according to the present invention stores the liquid agent container 6 or 60 filled with the liquid agent or the like to be discharged and reduced in volume by the external pressure in the pressure vessels 3 and 4. . A liquid that pressurizes the liquid agent container 6 or 60 is connected to the pressure container. By pumping an arbitrary amount of liquid to the pressure vessels 3 and 4 by the pump 1, an arbitrary amount of liquid agent is discharged from the discharge tube 20 which is connected to the discharge port of the liquid agent container 6 and guides the liquid agent and the like to the outside. It is configured to be able to. Therefore, the micro-dispensing device for liquid chemicals according to the present invention can stably control the micro-discharging. In addition, since the discharge liquid container is in the pressurized liquid, stable operation can be expected because it is unlikely to be affected by the outside air temperature. Since a liquid for pressurization is used, volume compression does not occur when gas is compressed to a high pressure, and stable continuous discharge is possible. After use or when it is desired to use a different liquid agent or the like, it suffices to replace the liquid agent container 6 or 60 with the discharge tube 20 and the maintenance is very simple.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a micro-dispensing device for a liquid agent or the like according to the present invention.

FIG. 2 is a front view of a pressure vessel of the apparatus of the embodiment.

FIG. 3 is a view showing a connecting portion of a pressure container, a liquid agent container, and a discharge tube of the apparatus of the embodiment, in which a part of the main body of the pressure container is cut away.

FIG. 4 is a schematic view showing a modified example of a liquid agent container of a small amount dispensing device for a liquid agent or the like according to the present invention.

[Explanation of symbols]

 1 Pump 2 Water Tank 3 Container Body 4 Face Plate 5 Air Venting Cock 6 Liquid Agent Container 7 Pressurized Container Internal Space 8 Packing 10 Pump Driving Unit 18, 19 Pressurizing Liquid Transport Tube 20 Small Discharge Tube for Liquids 31 Mounting Seat 32 guide washer 60 liquid container 61 cock valve 62 liquid supply tube

Claims (1)

[Scope of utility model registration request] 1. A liquid agent container which is filled with a liquid agent to be discharged and whose volume is reduced by an external pressure, and a pressurized liquid which accommodates the liquid agent container and pressurizes the liquid agent container are connected to pressurize the liquid agent container. A pressurized container, a discharge tube connected to the discharge port of the liquid agent container to guide the liquid agent and the like to the outside, a tank containing the pressurized liquid, and an arbitrary amount of the pressurized liquid to be delivered to the pressurized container. A micro-dispensing device that consists of a pump and a liquid agent.