JPH0326158Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" The invention relates to a quantitative filling device. The present invention relates to a quantitative filling device with a filling nozzle that is raised.

"Prior Art" Conventionally, when filling a container with a filling liquid, an air nozzle is normally injected into the container to clean the inside of the container before filling the container with the filling liquid. .

In the next filling process, the tip of the filling nozzle should be placed as close to the surface of the filling liquid as possible, especially when filling a filling liquid that tends to foam or a filling liquid with a high viscosity from which trapped air cannot be easily discharged. Filling is performed while keeping the head small by raising the filling nozzle to follow the level of the filling liquid filled into the container.

``Problem to be solved by the invention'' Conventionally, the air cleaner with the air nozzle and the filling mechanism with the filling nozzle were configured as separate devices, and they were arranged in order in the conveying direction of the container. The drawback was that the entire filling device became large.

Furthermore, in the past, the filling nozzle was raised using the drive source of a measuring cylinder that supplied and discharged a predetermined amount of filling liquid, so the filling speed of filling liquid by the measuring cylinder and the rising speed of the filling nozzle were constant. It had become a relationship. However, the rising speed of the liquid level of the filling liquid varies depending on the cross-sectional shape of the container, so when using different types of containers with different cross-sectional shapes, the above-mentioned constant head must be maintained for all types of containers. The disadvantage was that it could not be maintained, and foaming and air entrainment were severe.

``Means for Solving the Problems'' In view of such drawbacks, the present invention provides a conveyor for conveying containers, a moving frame that is moved up and down in synchronization with the conveyance of containers by this conveyor, and this moving frame. an air nozzle that is movable up and down to clean the inside of the container; a cylinder that is installed on the movable frame that raises and lowers the air nozzle; and a filling that is movable up and down on the movable frame on the front side of the air nozzle in the conveying direction of the container. a nozzle; a servomotor that is provided on the moving frame and raises the filling nozzle in accordance with the liquid level of the filling liquid filled in the container;
The present invention provides a quantitative filling device that includes a measuring cylinder that supplies and discharges a predetermined amount of filling liquid and supplies the sucked filling liquid to the filling nozzle, and a drive source that operates the measuring cylinder to supply and discharge the filling liquid. .

"Operation" According to the above configuration, the air nozzle and the filling nozzle are provided in the moving frame that moves forward and backward in synchronization with the conveyance of the container by the conveyor, so that the quantitative filling device can be manufactured compactly.

Since the air nozzle and the filling nozzle are operated separately by cylinders and servo motors installed in the moving frame, it is possible to obtain the optimal timing for cleaning and filling operations, and especially Since the filling nozzle is operated by a servo motor separately from the drive source that supplies and discharges the metering cylinder, even if the filling speed of the filling liquid by the metering cylinder remains constant, the rising speed of the filling nozzle can be extremely easily adjusted. can be changed,
Therefore, when changing the type of container, it is possible to immediately obtain the optimum filling nozzle lifting speed corresponding to the container.

"Example" The present invention will be explained below with reference to the illustrated example.
In FIGS. 1 to 3, a conveyor 1 is driven by a motor 2 and is capable of continuously conveying containers (not shown) in a line at predetermined intervals. An air nozzle 4 of an air cleaner 3 and a filling nozzle 6 of a quantitative filling mechanism 5 are provided above.

In the illustrated embodiment, there are eight air nozzles 4 and eight filling nozzles 6 each, and the air nozzles 4 are arranged upstream of the conveyor 1, and the interval between the 16 nozzles 4 and 6 in total is set on the conveyor 1. The distance between the containers is matched to the distance between the containers conveyed by.

The air nozzle 4 and the filling nozzle 6 are designed to be raised and lowered separately, but both are attached to a moving frame 8 provided in the machine frame 7 on one side of the conveyor 1 so as to be movable forward and backward along this side. It is set up. The moving frame 8 is linked to a servo motor 11 provided on the machine frame 7 through a nut member 9 provided thereon and a threaded rod 10 screwed into the nut member 9. Therefore, in synchronization with the transport conveyor 1, the containers are moved forward at the same speed as the containers transported by the transport conveyor 1, and are moved backward from the forward end to the backward end at a high speed.

As shown in FIGS. 1 and 2, the air cleaner 3 has a pair of support columns 15 erected on the movable frame 8.
and a support member 16 stretched between the upper ends of both columns 15.
and the air cylinder 1 attached to this support member 16.
The piston rod 18 of the air cylinder 17 is connected to an elevating member 19, which is guided in elevating and lowering by the support column 15 and is positioned above the conveyor 1.

A total of eight intake pipes 21 are fixed to the lifting member 19 in accordance with the interval between the containers described above, and as shown in FIG. The lower part of the intake pipe 21 is fixed in a state where it projects downward from the lower end of the intake pipe 21. Each air nozzle 4 is connected to a compressed air source (not shown) that supplies clean air, and each intake pipe 21 is connected to a negative pressure source (not shown).

Further, on the outer periphery of the lower part of the intake pipe 21, an elevating pipe 22 is provided so as to be movable up and down and guided by a guide member 20 attached to the intake pipe 21 and the moving frame 8.
A guide cone 23 for centering the container on the air nozzle 4 is attached to the lower end of the container. Normally, the lifting pipe 22 has a stopper member 24 attached to its upper end due to its own weight.
It is located at the lower end position where it abuts against a stopper member 25 attached to the lower end of 1.

Next, as shown in FIGS. 1 to 3, the quantitative filling mechanism 5 includes a pair of pillars 30, a support member 31, and an elevating member 32, similar to the air cleaner 3.
However, the nozzle elevating means for elevating and lowering the elevating member 32 uses a servo motor 34 instead of the air cylinder 17 as in the case of the air cleaner 3.

The servo motor 34 and the elevating member 32 are comprised of a threaded rod 35 rotatably provided on the movable frame 8 and screwed onto the elevating member 32, a pulley 36 provided on the threaded rod 35, and a pulley 36 and the above-mentioned It is interlocked with a pulley 38 provided on a rotating shaft 37 of a servo motor 34 via a belt 39 wrapped around it, and the elevating member 32 can be raised and lowered by forward or reverse rotation of the servo motor 34. I have to.

The elevating member 32 includes, as shown in FIG.
The eight filling nozzles 6 described above are each fixed, and a guide rod 40 is provided on both sides of each filling nozzle 6 so as to be able to rise and fall freely, and a guide cone 41 is attached to the lower end of this guide rod 40 to center the container on the filling nozzle 6. ing. In addition,
In FIGS. 3 and 5, 33 is a stopper that prevents the guide cone 41 from descending and coming into contact with the conveyor 1 when no container is present.

Further, each of the filling nozzles 6 is communicated with each of the eight measuring cylinders 42 shown in FIGS. 2 and 3 via a flexible hose (not shown). Although not shown, the pistons of each measuring cylinder 42 are reciprocated in conjunction with the motor 2 that drives the conveyor 1, so that they can suck in the filling liquid and supply it to the filling nozzles 6. In this way, both the conveyor 1 and the piston of the measuring cylinder 42 are mechanically interlocked with the motor 2, so that they are driven in synchronization with each other.

On the other hand, the servo motor 11 that reciprocates the moving frame 8 and the servo motor 34 that moves the filling nozzle 6 up and down are electrically connected to the motor 2 via control circuits 46 and 47 of a control device 45 and an encoder 48, respectively. The control circuits 46 and 47 detect the rotational speed and amount of rotation of the motor 2 using the encoder 48 and control the servo motors 11 and 34 accordingly. The elevating frame 8 and the filling nozzle 6 can be operated in synchronization with the conveyor 1.

Further, the air cylinder 17 for raising and lowering the air nozzle 4 is actuated by a signal from a detector consisting of a rotary cam and a limit switch (not shown), and the moving frame 8 is at the rear end, that is, in the left direction in FIG. When the moving frame 8 reaches the forward end, the air nozzle 4 is lowered, and when the moving frame 8 reaches the forward end, the air nozzle 4 is raised. Of course, the timing of raising and lowering the air nozzle 4 can be changed freely.

In the above configuration, when the moving frame 8 is positioned at the backward end by the servo motor 11 while the containers are being continuously transported by the transport conveyor 1, the moving frame 8 is moved by the servo motor 11.
The air nozzle 4 of the air cleaner 3 is moved forward at the same speed as the container.
The filling nozzles 6 of the quantitative filling mechanism 5 are located directly above the container and are moved at the same speed as the container.

When the moving frame 8 is positioned at the backward end by the servo motor 11, the air cylinder 1
7 operates to lower the elevating member 19 of the air cleaner 3, and the servo motor 34 operates to lower the elevating member 32 of the quantitative filling mechanism 5. When the elevating member 19 of the air cleaner 3 is lowered, the air nozzle 4, intake pipe 21, elevating pipe 22, and guide cone 23 are lowered together.
When the guide cone 23 contacts the container, it centers the container on the air nozzle 4, and the container stops the container from descending. Continued lifting member 1
When the air nozzle 9 descends, the air nozzle 4 is inserted into the container, and in this state, the inside of the container is cleaned by the clean air injected from the air nozzle 4, and the clean air injected into the container is sent to the lifting pipe 22 and the intake air. It comes to be discharged to the outside via the pipe 21.

On the other hand, when the elevating member 32 of the quantitative filling mechanism 5 is lowered, the container and the filling nozzle 6 are centered by the guide cone 41, and then the filling nozzle 6
The lower end of the container descends to a position near the bottom of the container and stops there. Then, the filling liquid is discharged from the measuring cylinder 42 operated in synchronization with the conveyor 1, and the filling liquid is filled into the inner bottom of the container from the filling nozzle 6. When the filling liquid is filled into the container and the liquid level rises, the control circuit 47 controls the servo motor 34 based on a preset value corresponding to the container, and the liquid level of the filling liquid filled into the container rises. The filling nozzle 6 is raised following the surface, and the distance between the liquid level and the lower end of the filling nozzle 6 is maintained substantially constant.

When filling the container with the filling liquid is completed, the servo motor 34 moves the filling nozzle 6 and the guide cone 41.
The air cylinder 17 raises the air nozzle 4, guide cone 23, etc. when the movable frame 8 reaches a predetermined forward position. Thereafter, when the moving frame 8 reaches the forward end, the servo motor 11 rapidly moves it backward to the backward end, and again moves the moving frame 8 forward at the same speed as the container.
At this time, each filling nozzle 6 is positioned directly above each container that has been cleaned by the air nozzle 4.

However, in this embodiment, when filling a container with the filling liquid in which the rate of rise of the liquid level is different from that in the case described above, the control circuit 47 adjusts the rotation of the servo motor 34 to correspond to the new container. This makes it much easier to complete the adjustment work than in the past.

"Effects of the invention" As described above, according to the invention, it is possible to manufacture a quantitative filling device in a compact manner, and the air nozzle and filling nozzle can be adjusted at the optimal timing required for cleaning work and filling work, respectively. can be activated. Furthermore, the rising speed of the filling nozzle can be changed extremely easily while keeping the filling speed of the filling liquid in the metering cylinder constant. Therefore, when changing the type of container, the optimal The effect is that the rising speed of the filling nozzle can be immediately obtained.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a plan view, FIG. 3 is a right side view, and FIGS. 4 and 5 are sectional views taken along lines - and - in FIG. 1, respectively. DESCRIPTION OF SYMBOLS 1... Conveyance conveyor, 2... Motor, 3... Air cleaner, 4... Air nozzle, 5... Quantitative filling mechanism, 6... Filling nozzle, 8... Moving frame, 17
... Air cylinder, 32, 33 ... Lifting member, 3
4...Servo motor, 42...Measuring cylinder, 4
5...control device.

Claims (1)

[Scope of utility model registration request] A transport conveyor for transporting containers, a moving frame that moves forward and backward in synchronization with the transport of containers by the transport conveyor, an air nozzle that is provided on the moving frame so as to be movable up and down to clean the inside of the container, and an air nozzle that is provided on the moving frame to clean the inside of the container. a cylinder that moves the air nozzle up and down; a filling nozzle that is movable up and down on the movable frame on the front side of the air nozzle in the conveying direction of the container;
a servo motor installed on the moving frame to raise the filling nozzle to follow the level of the filling liquid filled in the container; 1. A fixed-quantity filling device comprising: a measuring cylinder for feeding and discharging; and a drive source for supplying and discharging the measuring cylinder.