JPH0542080Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a filling device in which the filling valve is opened and closed by a cylinder device connected to the filling valve. The present invention relates to an operating pressure supply device for supplying.

"Prior Art" Conventionally, a filling valve is lowered relative to a container, a nozzle provided on the filling valve is inserted into the container, and then the filling valve is opened by a cylinder device to perform filling. A filling device is known in which, after the valve is closed and filling is completed, the filling valve and the cylinder device are raised together to pull out the nozzle from inside the container.

In this type of filling device, since the cylinder device moves up and down together with the filling valve, working pressure is supplied to the cylinder device through a flexible conduit connected to the cylinder device. I have to.

``Problems to be solved by the invention'' However, since the flexible conduit is located above the container, it is difficult to use when filling in particularly clean conditions, such as when filling pharmaceuticals, etc. Each conduit must be cleaned and cleaned, and cleaning such flexible conduits is cumbersome and tends to be incomplete.

Further, since the cylinder device is normally integrated into the filling valve, the conduit must be attached and removed each time the filling valve is cleaned, which impairs work efficiency.

"Means for Solving the Problems" In view of such drawbacks, the present invention has been developed to solve the above-mentioned conventional filling device, namely, a lifting member provided on the main housing so that it can be raised and lowered, and a lifting member that can be raised and lowered outside the main housing. A filling valve attached to a member, a cylinder device that opens and closes the filling valve in conjunction with the filling valve, an elevating mechanism that raises and lowers the elevating member, and a plurality of supply passages that supply operating pressure to the cylinder device. In the filling device, the cylinder device is integrally provided in the valve housing of the filling valve, and a plurality of supply passages for supplying operating pressure to the cylinder device are formed in the valve housing and in the lifting member, respectively. one end of the plurality of supply passages formed in the valve housing is connected to the cylinder device, and the other end of the supply passage is opened to a mating surface of the valve housing with the lifting member; One end of a plurality of supply passages formed in the lifting member is opened at a mating surface of the lifting member with the valve housing, and the valve housing and the mating surface of the lifting member are overlapped, so that the valve housing is A device is removably attached to the elevating member to allow each of the plurality of supply passages formed in the valve housing and each of the plurality of supply passages formed in the elevating member to communicate with each other, and further formed in the elevating member. The other ends of the plurality of supply passages are drawn into the main housing, and a conduit is connected to the supply passages inside the main housing, and the supply passages are communicated with a pressure source via the conduit. It is something that

"Operation" According to such a configuration, the supply passage is formed within the elevating member and the flexible conduit is not exposed outside the main housing as in the conventional case, so that the conduit can be cleaned. You can save time and effort. Furthermore, the filling valve and the cylinder device can be cleaned simply by attaching and detaching them from the elevating member without having to attach or detach the conduit from the cylinder device as in the conventional case, thereby improving work efficiency.

``Example'' An example in which the present invention is applied to a rotary weight filling device will be described below. In FIG. 1, the rotary weight filling device is attached to a vertical main shaft (not shown) and is driven to rotate in one direction. It includes a cylindrical rotating body 1, and a plurality of Roberval weighing scales (parallelogram weighing scales) 2 are housed inside the rotating body 1.

Each Roberval type weight scale 2 is connected to the outer peripheral wall 3 of the rotating body 1.
A plurality of weighing scales are arranged at equal intervals along the circumferential direction, and each Roberval weighing scale 2
A horizontally disposed beam 4 is disposed toward the radial direction of the rotating body 1, and the radially inner end 4a of the beam 4 is connected to the rotating body via a support member 5 fixed to the outer peripheral wall 3. It is fixed at 1.

A connecting member 6 is attached to the radially outer free end 4b of the beam 4, and the connecting member 6 is loosely fitted into a through hole 7 formed in the outer peripheral wall 3, and its tip is connected to the rotating body. It is made to protrude outside of 1.
A support table 9 for supporting a container 8 is connected to the protruding end of the connecting member 6 so as to be horizontally opposed to the Roberval weighing scale 2 with the outer circumferential wall 3 of the rotating body 1 interposed therebetween. In addition, labyrinth members 10 and 10 are provided in the connecting member 6 and the through hole 7, respectively, in order to isolate the inside and outside of the rotating body 1 as much as possible.
11 is installed.

The Roberval weighing scale 2 basically detects the weight applied to the free end 4b of the beam 4 by means of a strain gauge provided on the beam 4, as is conventionally known. In the Roberval weighing scale 2 of the embodiment, a smaller Roberval weighing scale 2' having the same structure is disposed below the beam 4, and the adjustment bolt 12 provided at the free end of the beam 4' is connected to the adjusting bolt 12 of the beam 4. It is linked to the free end 4b. When the free end 4b of the beam 4 is displaced downward, the beam 4' of the Roberval weighing scale 2' is displaced downward via the adjustment bolt 12, and the The free end 4b of the beam 4 is not strained by a strain gauge.
This makes it possible to detect the weight added to the

Next, above each of the support tables 9, there is provided a filling valve 15 for filling the container 8 supplied onto the support table 9 with a filling liquid. Each filling valve 15 is attached to the upper end of a lifting member 16 provided on the rotating body 1 so as to be able to rise and fall freely, and after being housed in the rotating body 1, it can be raised and lowered by a lifting mechanism that will be described in detail. .

Valve housing 17 of each filling valve 15 mentioned above
A filling passage 18 is formed below its shaft, and the upper end of this filling passage 18 is connected to a radial hole 19 formed in the valve housing 17 and a flexible conduit 20 connected thereto. It communicates with a filling liquid tank (not shown), and its lower end communicates with a filling nozzle 21 attached to the valve housing 17.

A valve 25 made of a bottomed cylindrical bellows is housed in the valve housing 17. When the valve 25 is connected to a piston rod 27 of a cylinder device 26 and the piston rod 27 is lowered, the bottom of the valve is closed. The valve portion 25a is seated on a valve seat portion 17a formed in the valve housing 17 so that the filling passage 18 can be closed.

The piston 28 of the cylinder device 26 formed at the upper end of the piston rod 27 has a first pressure chamber 29 in its upper part and a second pressure chamber 30 in its lower part.
When compressed air is supplied from the supply passage 31 to the first pressure chamber 29, the piston 28 and piston rod 27 are lowered to seat the valve portion 25a on the valve seat portion 17a, thereby completing the filling process as described above. The passage 18 can be closed.

On the other hand, when compressed air is supplied to the second pressure chamber 30 from the second supply passage 32 formed in the valve housing 17, the piston 28 and the piston rod 27 are raised to move the valve portion 25a to the valve seat portion 17a. This allows the filling passage 18 to be opened.

A second piston 33 is fitted into the valve housing 17 at a position below the piston 28 so as to be movable up and down, and the piston rod 27 is slidably inserted through the shaft of the second piston 33. This second piston 33 is the piston 28
The above-mentioned second pressure chamber 30 is formed in the upper part, and the third pressure chamber 34 is formed in the lower part.

Therefore, when compressed air is supplied into the second pressure chamber 30 of the cylinder device 26, the second piston 33 is positioned at the lower end to allow the piston 28 to rise, and in this state, the filling passage 18 is fully opened. On the other hand, the valve housing 17
Compressed air is supplied to the third pressure chamber 34 through the third supply passage 35 formed in , to position the second piston 33 at the rising end, and at the same time, the first pressure chamber 2 is
When the piston 28 is lowered by supplying compressed air to the piston 9, the piston 28 is moved to the second piston 33.
to restrict free descent to the lowering end,
This allows the valve 25 to open at a predetermined small opening.

Further, the valve housing 17 includes, in addition to the supply passages 31, 32, 35, the valve 2.
5, an atmospheric passage 37 is formed to open the atmospheric pressure chamber 36 to the atmosphere, and each passage 31, 32, 35, 37 is , the lifting member 16
It communicates with each of the passages 38 to 41 provided inside.

However, as shown in FIG.
Reference numeral 6 is slidably inserted through a support pipe 46 that vertically penetrates and is fixed to the upper wall 45 of the rotating body 1 at an intermediate position between the adjacent Roberval type weight scales 2, and its lower end is connected to the rotating body. It is interlocked with the above-mentioned elevating mechanism 47 housed in 1.

In the illustrated embodiment, the elevating mechanism 47 is composed of a cam mechanism, and a first cam follower 48 provided at the lower end of each elevating member 16 is rotatably mounted on a ring-shaped fixed cam 49 fixed to the machine frame. I'm leaving it there. Further, a second cam follower 50 provided at the lower part of each elevating member 16 is engaged with a vertical cam groove 51 provided in the rotating body 1, thereby preventing the elevating member 16 from rotating.

Among the passages 38 to 41 provided inside the elevating member 16, the passage 41 communicating with the atmospheric pressure chamber 36 is opened to the atmosphere at the lower end of the elevating member 16, and the other passages 38 to 40 are each connected to a compressed air source via a flexible conduit 52 and a solenoid valve (not shown).

Furthermore, as shown in FIG. 1, the weighing signal from the Roberval weighing scale 2 is input to a control device 56 having a microcomputer, and a rotation detector such as an encoder for detecting the number of rotations of the rotating body 1. The detection signal from 57 is also transmitted to the control device 56.
is input.

As shown in Fig. 3, if the total mass of the container 8 filled with the filling liquid measured by the Roberval weighing scale 2 is m and the gravitational acceleration is g, the total weight W is calculated by the following formula.
It is determined by (1).

W=mg...(1) Furthermore, if the centrifugal force applied to the container 8 is F, the radius between the container and the center of rotation is r, and the rotational speed of the container is v, then the centrifugal force F is expressed by the following equation (2). Desired. Note that, of course, the rotational speed v of the container can be obtained from the rotational speed of the rotating body 1.

F=mv ² /r ...(2) And the free end 4b of the Roberval type weight scale 2
When the weight W is added to the beam 4 and the beam 4 is tilted downward by θ, an upward component force F' is generated due to the centrifugal force, and this component force is determined by the following equation (3).

F'=F*tanθ=mv ² *tanθ/r (3) Note that the above tanθ can be obtained from the flatness characteristics of the Roberval weighing scale 2.

As can be understood from FIG. 3, the detected weight W' obtained by the Roberval weighing scale 2 is the value obtained by subtracting the upward component force F' due to centrifugal force from the true weight W, and The force F' varies depending on the rotational speed v of the rotating body 1, that is, the number of rotations.

Therefore, the control device 56 having the microcomputer detects the detection signal input from the rotation detector 57 and the Roberval weighing scale 2.
Based on the weighing signal from the above, calculate and add an upward component force F' generated by the centrifugal force applied to the container 8 and the filling to the detected weight W' measured by the Roberval weighing scale 2. Thus, the true weight W can be determined.

At this time, the control device 56 can calculate the true weight W by performing calculations based on the above-mentioned formulas each time it receives signals from the Roberval weighing scale 2 and the rotation detector 57. In order to shorten calculation time, the detected weight W' is plotted in advance on the vertical axis,
Create a table in which the above component force F' or the true weight W can be obtained from the intersection of the two with the rotational speed of the rotating body 1 as the horizontal axis, and store it in the memory of the microcomputer. You can leave it there. In this case, if the weighing signal from the Roberval weighing scale 2 and the detection signal from the rotation detector 57 are input, the component force F' or the true weight W can be immediately obtained from the table.

In the above configuration, when the filling valve 15 is located at the ascending end position and the valve 25 is closed, an empty supply star wheel (not shown) rotates in synchronization with the rotation of the rotary body 1 onto the support table 9. When the empty container 8 is supplied, the control device 56 inputs signals from the Roberval weighing scale 2 and the rotation detector 57 and stores the true weight of the empty container 8. At the same time, the elevating member 16 and the filling valve 15 are lowered based on the cam curve of the fixed cam 49, and the lower end of the filling nozzle 21 is inserted into the container 8.

The control device 56 detects the rotational angular position of the rotating body 1 from the rotation detector 57 or another not-shown detector, and the rotational angular position at which the lower end of the filling nozzle 21 is inserted into the container 8. When it is detected that the rotary body 1 has rotated up to this point, a solenoid valve (not shown) is opened to supply compressed air into the second pressure chamber 30, and a valve 25 is fully opened to transfer the filling liquid in the filling liquid tank to the conduit 20, The container 8 is filled via the radial bore 19, the filling channel 18 and the filling nozzle 21.

Thereafter, when the filling liquid is filled into the container 8 and its weight reaches a predetermined value, the control device 56 switches and controls the electromagnetic valve to fill the first pressure chamber 29 and the third pressure chamber 34. and supply compressed air at the same time. Then, as described above, the opening degree of the valve 25 becomes smaller, so that from then on, the filling liquid is filled little by little, and when the control device 56 detects that the predetermined weight has been reached, the first pressure chamber 29 The valve 20 is closed by supplying compressed air to the valve 20.

At this time, the control device 56 inputs signals from the Roberval weight scale 2 and the rotation detector 57 to determine the true weight of the container 8 and the liquid filled therein, and calculates the true weight of the container 8 and the liquid filled therein in advance. When the value obtained by subtracting the true weight of the empty container 8, that is, the true weight of only the filling liquid, reaches a predetermined value, compressed air is supplied only to the first pressure chamber 29 to close the valve 20. It's becoming like that. Therefore, rotating body 1
Even if the rotation speed of the container 8 changes or the weight of the container 8 changes, a predetermined weight of filling liquid can be reliably filled into the container 8.
can be filled inside.

In addition, in this embodiment, the above-mentioned Roberval type weighing scale 2
and the support table 9 are arranged to face each other in a substantially horizontal direction with the outer peripheral wall 3 of the rotating body 1 in between, and the outer peripheral wall 3
Since the support table 9 and the Roberval weighing scale 2 are connected via a connecting member 6 passed through a through hole 7 formed in the support table 9, the filling valve 15 disposed above the support table 9 Even if the filling liquid falls from the hole, the possibility that the filling liquid will flow through the through hole 7 is much smaller than when the conventional through hole is drilled vertically. Therefore, the possibility that the Roberval weighing scale 2 will be contaminated with the filling liquid can be reduced compared to the prior art.

In this embodiment, the cylinder device 26 is provided with passages 31, 32,
35, 37 are drawn into the interior of the rotor 1 serving as the main housing through passages 38-41 formed in the lifting member 16, and are connected to a pressure source such as a compressed air source through a conduit 52 from the interior of the rotor 1.
Unlike the case where a flexible conduit is directly connected to the rotor 1, the conduit is not exposed to the outside of the rotor 1.

Therefore, the trouble of cleaning the conduit can be omitted, and even when the filling valve 15 and the cylinder device 26 are integrated as in the above embodiment, it is not necessary to remove the conduit from the cylinder device as in the conventional case. Since the filling valve 15 and the cylinder device 26 can be cleaned simply by attaching and detaching them from the elevating member 16 without attaching or detaching them,
The workability of cleaning will improve.

"Effect of the invention" As described above, according to the invention, the conduit for supplying operating pressure to the cylinder device is not exposed to the outside of the main housing of the rotating body, etc.
The trouble of cleaning the conduit can be omitted,
Moreover, cleaning can be carried out by simply attaching and detaching the filling valve and cylinder apparatus from the lifting member, without having to attach or detach the conduit from the cylinder apparatus as in the conventional case, thus improving the workability of cleaning. The effect of this is that it is possible to achieve the desired results.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a cross-sectional view of a portion different from that in FIG. 1, and FIG. 3 is a principle diagram illustrating how an upward component of force is applied to the Roberval weighing scale 2 due to centrifugal force. 1... Rotating body (main housing), 8... Container, 9... Support table, 15... Filling valve,
16... Lifting member, 17... Valve housing,
25...Valve, 26...Cylinder device, 28,
33... Piston, 31, 32, 35... Supply passage, 38-41... Passage, 52... Conduit.

Claims (1)

[Scope of Claim for Utility Model Registration] An elevating member provided on the main housing so that it can be raised and lowered, a filling valve attached to the elevating member outside the main housing, and a cylinder device that opens and closes the filling valve in conjunction with the filling valve. , a filling device comprising an elevating mechanism for elevating and lowering the elevating member, and a plurality of supply passages for supplying operating pressure to the cylinder device, wherein the cylinder device is integrally provided in the valve housing of the filling valve, and the cylinder device is integrally provided with the valve housing of the filling valve; A plurality of supply passages for supplying operating pressure to the cylinder device are formed in the valve housing and in the lifting member, and one end of the plurality of supply passages formed in the valve housing is connected to the cylinder device. At the same time, the other end of the supply passage is opened to the mating surface of the valve housing with the lifting member, and one end of the plurality of supply passages formed in the lifting member is opened to the valve housing of the lifting member. the valve housing and the mating surface of the lifting member are overlapped, and the valve housing is removably attached to the lifting member, and each of the plurality of supply passages formed in the valve housing is connected to the valve housing. The plurality of supply passages formed in the elevating member are communicated with each other, and the other ends of the plurality of supply passages formed in the elevating member are drawn into the main housing, and the main housing An operating pressure supply device for a filling device, characterized in that a conduit is connected to the supply passage within the interior of the unit, and the supply passage is communicated with a pressure source via the conduit.