JPH0447115Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a quantitative filling device for a liquid filling machine for, for example, liquid beverages.

(Prior Art) FIG. 3 shows an example of a filling control mechanism in a conventional liquid filling device of this type.

In the figure, 1 is a storage tank for filling liquid, a switching valve 2 is provided in the lower liquid passage of the tank 1, and a diaphragm 10 is provided in the switching valve 2 for sealing the inside of the valve. It is being The liquid filling nozzle 7 passes through the switching valve 2.
A cylinder 3 is provided in the middle of the liquid path leading to the cylinder 3, and a piston 4 reciprocates inside the cylinder by the movement of a rod 5.

An end of a lever 6 which contacts the rotating filling cam 11 and swings about a fulcrum is pivotally attached to the end of the rod 5 on the side opposite to the piston. Therefore, the lever 6, which swings as the filling cam 11 rotates, causes the piston 4 to reciprocate within the cylinder 3 via the rod 5.

A container 9 is carried in and out of a fixed position below the liquid filling nozzle 7, and a detection device is provided to detect the presence or absence of the container and whether it is in the fixed position. There is.

In the above configuration, when the container 9 is carried in and out of the above-mentioned fixed position repeatedly in a normal state, a predetermined amount of liquid is sequentially filled into the container 9 from the nozzle 7. There is.

Now, when the detection device detects that the container 9 is not in the fixed position below the nozzle 7, the switching valve 2 is actuated to prevent the filling liquid from flowing out from the nozzle 7 based on the signal. However, even at this time, the piston 4, which is integrated with the rod 5, continues to move up and down via the lever 6 with the same stroke as during normal filling operation.

In addition, in cleaning the above-mentioned filling device, after the machine has finished operating, the machine is stopped, the switching valve 2 is opened, the piston 4 is installed at the lower limit position, and the inside of the machine is cleaned, and then the switching valve 2 and the piston are cleaned. 4 has been disassembled and cleaned.

In this way, in the conventional filling machine, the detection device 8 detects the presence or absence of the container 9 and operates the switching valve 2 while continuing the movement of the piston 4 to cause the liquid to flow back into the tank 1. This causes a problem in that water hammer occurs when the switching valve 2 is closed, and the diaphragm 10 sealing the inside of the switching valve 2 is damaged.

In addition, when cleaning fluid beverage filling equipment such as juice and milk, it is necessary to disassemble and clean it as mentioned above in order to check the cleanliness, which takes a lot of effort from the viewpoint of cleaning performance and machine workability. Another problem was that it required a lot of labor.

(Problem that the invention aims to solve) In other words, in conventional liquid filling devices, even when temporarily blocking filling, the switching valve is opened and the piston continues to operate, which creates an unreasonable force in the filling system. This has the problem of destroying the diaphragm in the switching valve, for example, and cleaning the equipment requires stopping the machine, cleaning each part, and disassembling and cleaning the switching valve and piston at the same time. The problem was that productivity was low.

This invention was developed to solve these problems at the same time. It prevents the backflow of liquid into the tank even in the case of temporary filling blockage, eliminates unnecessary loads in the filling system, and cleans the equipment. It is an object of the present invention to provide a liquid filling device that can efficiently carry out the process and also make it possible to clean the inside of the filling system while the machine is stopped.

(Means for solving the problem) Therefore, the present invention provides a cylinder device in the middle of the liquid path between the filling liquid storage tank and the liquid filling nozzle, and the piston rod of the device A liquid filling device that fills a certain amount of filling liquid into a container carried into the lower part of the nozzle by reciprocating a lever that swings by a cam, the device being connected to the side opposite to the piston of the piston rod, and having one end connected to the side opposite to the piston. A piston connected to the swinging lever is provided, and an air cylinder having operating air inflow and outflow pipes for air to flow in and out is provided on both sides of the piston, and the presence or absence of a container carried into the lower part of the nozzle is detected. A detection device is provided, and a brake device is provided on the side of the piston rod that is actuated to fix the piston rod when the detection device confirms the absence of a container, and the air cylinder is fixed with the piston rod fixed by the brake device. When the swinging lever swings, only the piston in the air cylinder reciprocates, and the air cylinder is released from the piston rod's braking device, and When the swinging lever is not in operation, air flows in and out from the operating air inflow and outflow pipe, causing it to reciprocate together with the piston rod, regardless of the internal piston. It is intended as a means of

(Operation) When the detection device confirms that a container is carried into the lower part of the nozzle, the brake device is inactive, and the lever that swings due to the rotation of the filling cam swings, causing the pressure inside the air cylinder to swing. The piston reciprocates, and the air cylinder reciprocates according to the piston's top dead center and bottom dead center positions, causing the piston rod to reciprocate, and the filling liquid in the storage tank is filled into the container through the nozzle. Ru.

Next, when the detection device detects that no container is carried into the lower part of the nozzle, the brake device fixes the piston rod and at the same time fixes the air cylinder. Therefore, even if the lever swings due to the rotation of the filling cam, the piston only reciprocates between the top and bottom dead center positions within the fixed air cylinder, and the piston rod does not reciprocate with the cylinder, so there is no air inside the container. The filling liquid will not be filled from the nozzle.

Next, when attempting to clean the inside of the filling system when the machine is stopped, connect the swinging lever to the piston in the air cylinder at the lowest position, release the brake system, and apply operating air to both sides of the piston of the air cylinder. When the air cylinder is moved in and out, the air cylinder moves up and down with the piston rod regardless of the fixed piston, making it possible to clean the piston seal.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is an overall mechanical diagram of a liquid filling device showing an embodiment of the present invention.

In the figure, 1 is a liquid storage tank, 2 is a switching valve, 3 is a cylinder, 4 is a piston that slides inside the cylinder 3, 5 is a rod for driving the piston 4, and 6 is a piston that swings as the filling cam rotates. 7 is a nozzle for filling liquid, and 8 is a detection device for detecting the presence or absence of a container 9, etc., and there is nothing essentially different from the conventional one shown in FIG.

Therefore, here, we will mainly explain the parts that are different from the conventional one.

In the figure, 12 is an air cylinder, at both ends of which there are inflow and outflow pipes 13 for the working air of the air piston 15,
14 are connected. In addition, the same air cylinder 1
2 is connected to one end of a driving rod 5 of the piston 4, and the rod end of an air piston 15 that slides within the air cylinder 12 is pivotally connected to the tip of a lever 6.

A brake device 16 is disposed close to the driving rod 5 of the piston 4, and is activated to prevent the rod 5 from moving up and down when the container 9 is not in a fixed position below the nozzle 7 during filling.

In the above configuration, during normal filling, as shown in FIG. Fix it. As a result, piston 4, rod 5,
The air cylinder 12 and the air piston 15 are integrated, and the piston 4 slides within the cylinder 3 in conjunction with the swinging of the tip of the lever 6.

In this way, one container 9a is now filled with a predetermined amount of liquid, and when the filling is completed, the filling piston 4 and the air piston 15 are each at the top dead center position (second At this time, the brake device 16 is in a non-operating state. At this point, when information is given from the detection device 8 that there is no container 9b to be filled next, the brake device 16 operates as shown in FIG. 2A to stop the piston 4 at the top dead center position. . At this time, air is alternately and repeatedly discharged from the operating air inflow and outflow pipes 13 and 14 on the upper and lower sides of the air cylinder 12, and the air piston 15 moves freely within the air cylinder 12 in conjunction with the swinging of the tip of the lever 6. to slide.

Therefore, the filling piston 4 in the cylinder 3 is disconnected from the tip of the lever 6, which is swung by the constantly rotating filling cam 11, and liquid is not filled. If the third container 9
When c is moved to a fixed position directly below the nozzle 7, the brake device 16 releases the rod 5 by the detection device 8, and at the same time, air flows into the air cylinder 12 from the working air inlet/outlet pipe 14 and is integrated with the piston 4 for filling. Then, the filling operation is restarted as shown in FIG. 2B in the same manner as described above. In this way, the normal filling operation will be repeated as long as the container 9 is present. In the event that filling is temporarily interrupted, the operation of the machine is not stopped and the filling piston 4 is not operated, so no unnecessary load is placed on the filling system.

On the other hand, when attempting to clean the inside of the filling system when the machine is stopped, set the tip of the lever 6 to the lower limit as shown in Fig. 2C, and alternately supply air from the upper and lower operating air inflow and outflow pipes 13 and 14. The air cylinder 12, ie, the filling piston 4, is moved up and down with the same stroke as in the normal filling operation.

(Effects of the invention) As explained in detail above, according to the invention, when the detection device confirms that a container is carried into the lower part of the nozzle, the brake device is inactive and the filling cam rotates to shake the container. As the moving lever swings, the piston inside the air cylinder reciprocates, and as the air cylinder reciprocates according to the top dead center and bottom dead center positions of the piston, the piston rod reciprocates, and the piston rod inside the storage tank reciprocates. The filling liquid is filled into the container through the nozzle.

Next, when the detection device detects that no container is carried into the lower part of the nozzle, the brake device fixes the piston rod and at the same time fixes the air cylinder. Therefore, even if the lever swings due to the rotation of the filling cam, the piston only reciprocates between the top and bottom dead center positions within the fixed air cylinder, and the piston rod does not reciprocate with the cylinder, so there is no air inside the container. The filling liquid will not be filled from the nozzle.

Next, when attempting to clean the inside of the filling system when the machine is stopped, connect the swinging lever to the piston in the air cylinder at the lowest position, release the brake system, and apply operating air to both sides of the piston of the air cylinder. When the air cylinder is moved in and out, the air cylinder moves up and down with the piston rod regardless of the fixed piston, making it possible to clean the piston seal.

Therefore, according to the present invention, there is no internal pressure fluctuation in the filling system when filling is blocked, and damage to the diaphragm, etc. can be prevented, and the service life is extended accordingly. Furthermore, the present invention allows cleaning of the pipes in the filling system while the machine is stopped without disassembling the device.

[Brief explanation of the drawing]

Fig. 1 is an overall mechanical diagram of a liquid filling device showing an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the states of each operation mode, and Fig. 3 is an overall mechanical diagram showing an example of a conventional liquid filling device. be. Explanation of the main parts of the diagram, 4... Piston, 6...
Lever, 7... Nozzle, 8... Detection device, 11...
...Cam, 12...Air cylinder, 15...Air piston, 16...Brake device.

Claims (1)

[Scope of utility model registration request] A cylinder device is provided in the middle of the liquid path between the filling liquid storage tank and the liquid filling nozzle, and the piston rod of the device is reciprocated by a lever that swings by a rotating filling cam, thereby pumping a fixed amount of liquid. In a liquid filling device for filling a container carried into a lower part of the nozzle with a filling liquid, a piston is provided which is connected to the side opposite to the piston of the piston rod and whose one end is connected to the swinging lever; an air cylinder having operating air inflow and outflow pipes for air to flow in and out, and a detection device for detecting the presence or absence of a container being carried in at the bottom of the nozzle, and the detection device detects the absence of a container. A brake device is provided on the side of the piston rod which operates and fixes the piston rod when confirmed, and when the piston rod is fixed by the brake device, the air cylinder is fixed integrally, and the swinging lever swings. Even if the air cylinder moves, only the piston within the air cylinder reciprocates, and when the air cylinder is released from being fixed by the brake device of the piston rod and the swinging lever is not operated, the working air inflow and outflow pipe A liquid filling device characterized in that it reciprocates integrally with the piston rod regardless of the internal piston due to the inflow and outflow of air from the piston rod.