JPS597581Y2 - Fluid metering dispenser - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a dispensing device for dispensing incompressible fluids such as grease.

There are various types of devices for dispensing and dispensing highly viscous fluids such as grease on the market, but most of these use separate drive sources to drive the cylinder for quantitative measurement and the cylinder for dispensing. The structure was complex and large-scale.

Particularly, when supplying a fixed amount of grease to a bearing, it is necessary to successively supply a large number of very small amounts of grease, and it is required to be easy to operate and have good performance.

There is also a need for something that can be easily integrated into an automated line.

This invention was developed in response to the above requirements, and the structure of this invention will be explained below with reference to specific embodiments shown in FIGS. 1 to 3.

Figure 1 is an overall configuration diagram showing the basic concept of this invention.
2 is a metering discharge device, 2 is an electromagnetic valve, 3 is a liquid (fluid) pressure pump, 4 and 5 are pneumatic paths, 6 is a liquid path, and 7 is a liquid discharge port.

That is, pneumatic piping is connected to the metering dispenser 1 via the electromagnetic valve 2,
Pressure is constantly applied by the liquid pressure pump 3.

Then, the solenoid valve 2 is switched to transfer the air pressure to the air pressure paths 4 and 5.
By alternately switching to , the metering and dispensing device 1 is operated, and the liquid sent from the liquid pressure pump 3 is quantitatively discharged from the liquid discharging port 7 .

FIG. 2 is a drawing showing a specific configuration of a metering and dispensing device designed based on the basic concept shown in FIG.

As is clear from the drawing, this metering and dispensing device consists of a driving cylinder device A and a driven cylinder device B operated by the driving cylinder device A, and is activated by switching a single electromagnetic valve as shown in Fig. 3. Operated by a pneumatic circuit.

The active cylinder device A includes a cylinder main body 11, a spool 12 that slides left and right inside the main body, cylinder rods 13a and 13b integrated with the spool, cylinder tubes 14a and 14b integrated with the main body, and a cylinder tube. It consists of side plates 15a and 15b that cover the sides.

The cylinder body 11 is connected from the outer diameter to the inner diameter.
A hole 16 for introducing a fluid such as grease, a measuring chamber 17, and a hole 18 for discharging fluid are provided at three predetermined positions.

The spool 12 is provided with an annular groove 19 in its center, and when the spool moves to the right, the groove is inserted into the introduction hole 19 of the main body.
and the metering chamber 17, and when the spool moves to the left, it communicates with the metering chamber 17 and the discharge hole 18 of the main body.

The cylinder tubes 14 a , 14 b have branch holes 20 a , 20 a and 20 b for sending air pressure to a driven cylinder B, which will be described later.
20b is provided.

Finally, air pressure supply holes 21 are provided in the side plates 15a and 15b.
a, 21b are provided.

The driven cylinder B is installed on the main body 11 of the main cylinder A, and includes a cylinder tube 22 and lids 23 above and below it.
, 24, a cylinder rod 25, a stopper 26, and a leg body 27.

The cylinder tube 22 is cylindrical.

The upper lid 23 includes a main body 23a and a stopper screw hole 23 in the center.
b and an air pressure supply hole 23C.

The lower cover 24 consists of a main body 24a, a central cylinder rod insertion hole 24b, and an air pressure supply hole 24C.

The cylinder rod 25 consists of a main body 25a, a head 25b, and a distal end 25C.The distal end 25C fits into the measuring chamber 17 of the main body of the above-mentioned active cylinder A, and as the cylinder rod 25 descends, the flow in the measuring chamber 17 increases. Animal discharge hole 1
It plays the role of discharging from 8 to the outside.

Finally, the stopper 26 serves to finely adjust the movement position of the cylinder rod 25.

In the above structure, from the electromagnetic valve 28 shown in FIG.
When air pressure is being sent from the air pressure supply hole 21a, the spool 12 is pushed by the cylinder rod 13a and is moved to the right side of the main body 11.

Further, the cylinder rod 25 is also pushed up to the tip of the stopper 26 by the air pressure from the air pressure supply hole 21a passing through the hole 20a of the cylinder tube 14a, passing through the hole 24C of the lower cover 24.

In this state, the fluid being pumped by the pump passes through the hole on the back side of the main body 11, that is, the introduction hole 16, and fills the measuring chamber 17 and the groove 19.

Further, the discharge hole 18 of the main body 11 is closed by the spool 12.

Next, when the electromagnetic valve 28 is switched and air pressure is sent from the air pressure supply hole 21b, the spool 12 moves to the left side of the main body 11 together with the cylinder rod 13b.

At a position where the spool 12 is closer to the left side of the main body 11, the fluid passage hole, that is, the introduction hole 16 is blocked by the spool 12, so the fluid pressure in the metering chamber 17 is zero.

Furthermore, since the hole 20b of the cylinder tube 14b, which had been blocked by the cylinder rod 13b, is opened at approximately the final position of the rod 2lb, the air pressure from the air pressure supply hole 21b passes through this hole. The cylinder rod 25 is pushed down through the hole 23C of the upper cover 23 of the driven cylinder device B.

At this time, the tip 25C of the rod pushes out the fluid in the measuring chamber 17 and discharges it to the outside from the discharge hole 18 of the main body 11.

Note that the amount of fluid discharged corresponds to the amount of movement of the cylinder rod 25, and is always constant.

After that, the solenoid valve 28 is switched again, and the air pressure supply hole 21
When air pressure is sent from a, the spool 12 is pushed back to the right position of the main body 11 by the cylinder rod 13a.

At this time as well, the hole 20a of the cylinder tube 14a, which was blocked by the cylinder rod 13a, is closed to the cylinder rod 13.
H is opened at the final position of movement, and the air pressure from the air pressure supply hole 21a passes through the hole 24C of the lower cover 24, and the cylinder rod 25 is pushed up to the tip of the stopper 26.

Also, while the spool 12 is moving, the discharge of the main body. After the outlet hole 18 is closed by the spool 12, the introduction hole 16 for the fluid being pumped by the pump is connected to the groove 19 and the metering chamber 17, so that the flow in the metering chamber 17 is reduced by the amount that the tip of the cylinder rod 25 moves. It's filled with animals.

Thereafter, by repeating the above steps, a fixed amount of fluid is discharged each time.

The discharge amount is changed by rotating the stopper 26 and changing the position of the tip using a screw, thereby changing the amount of movement of the cylinder rod 25.

The electromagnetic valve 28 is switched fully automatically and continuously by detecting the left and right movement of the spool 12 or cylinder rods 13a and 13b using a microswitch, etc., and using a timer or the like as necessary. A fixed amount of fluid can be discharged.

As explained above, this invention includes a cylinder body which has an introduction hole and a discharge hole on both sides with a measuring chamber in between, and a cylinder body which is slidably inserted into the cylinder body, and which has an introduction hole and a discharge hole on both sides. A spool with annular grooves communicating with the measuring chamber alternately and cylinder rods on both sides; a spool provided on both sides of the cylinder body to slidably accommodate the cylinder rods of the spool; and a drive pressure medium supply hole in the end side plate. have,
A driving cylinder device, which has a cylinder tube having a flow dividing hole in a part of the peripheral wall that opens at the working end of the cylinder rod and divides the drive pressure medium, and a cylinder tube that is arranged perpendicularly to the cylinder body of the driving cylinder device, and has a cylinder tube at both ends. a cylinder tube having a pressure medium supply hole connected to the flow dividing hole in the lid; and a cylinder tube slidably inserted into the cylinder tube,
a driven cylinder device consisting of a cylinder rod whose tip is fitted into the metering chamber, a stopper for adjusting the stroke of the cylinder rod, and one cylinder device for supplying and discharging pressure medium to driving pressure medium supply holes on both sides of the driving cylinder device. Regarding a fluid metering and discharging device characterized by a solenoid valve, the structure of the active cylinder device is designed to function as both a pressure medium switching valve and an introduction/discharge switching valve for the fluid to be measured. As a result, the device can be driven with one solenoid valve, and the control is simple, making it inexpensive and highly reliable.

Furthermore, since the main cylinder device and the driven cylinder device are integrally constructed, the requirement for a small space, which is an essential condition for an automated line, can be fully satisfied.

In addition, instead of measuring the fluid by time-controlled opening and closing of the on-off valve at the discharge port as in conventional measuring instruments, the fluid filling the measuring chamber is measured by a pressure pump or the like, and the fluid is transferred to the cylinder rod of the driven cylinder device. Since the tip part reliably pushes out the set stroke, it is possible to accurately dispense a fixed amount regardless of the viscosity of the fluid.

Furthermore, by simply changing the position of the driven cylinder device and the stopper, the stroke of the cylinder rod that fits into the metering chamber can be changed, making it easy to change the set discharge amount of the fluid.

[Brief explanation of the drawing]

Figure 1 is an overall configuration diagram showing the basic concept of this invention, Figure 2
The figure is a drawing showing the specific structure of the metering and dispensing device, and FIG. 3 is a pneumatic circuit diagram of the metering and dispensing device according to this invention. A... Driven cylinder device, B... Driven cylinder device, 11... Body, 12...
・Spool, 13 a, 13 b...Cylinder rod, 14 a, 14 b...Cylinder tube, 15 a, 15 b...Side plate, 1
6...Introduction hole, 17...Measuring chamber, 16
...Discharge hole, 19...Groove, 20a
, 20b...hole for sending air pressure, 21a, 2l
b...Pneumatic supply hole, 22...Cylinder tube, 23...Top lid, 23 C...
... Hole, 24 ... Lower cover, 24 C ...
Hole, 25...Cylinder rod, 25C...
...Tip, 26...Stopper.

Claims (1)

[Scope of utility model registration request] a cylinder body having an introduction hole and a discharge hole on both sides sandwiching a measuring chamber; and a cylinder body that is slidably inserted into the cylinder body,
A spool has an annular groove that alternately communicates the introduction hole and the discharge hole with the measurement chamber, and has a cylinder rod on both sides, and a spool that is provided on both sides of the cylinder body, slidably accommodates the cylinder rod of the spool, and has an end. A driving cylinder device having a driving pressure medium supply hole in a side plate, and a cylinder tube having a branching hole in a part of the peripheral wall that opens at the working end of the cylinder rod to divert the driving pressure medium, and the driving cylinder device as described above. A cylinder tube is disposed orthogonally to the cylinder body, and has a pressure medium supply hole connected to the flow dividing hole in the cover body at both ends, and a cylinder tube is slidably inserted into the cylinder tube, and the tip thereof is connected to the metering chamber. It consists of a driven cylinder device consisting of a fitted cylinder rod, a stopper for adjusting the stroke of this cylinder rod, and one electromagnetic valve for supplying and discharging pressure medium to drive pressure medium supply holes on both sides of the driving cylinder device. A fluid metering and dispensing device characterized by: