JP2004196412A - Fixed quantity filling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a measuring cylinder mechanism 6 or the like from being broken in an emergency. <P>SOLUTION: The device is so constituted that the piston and upper rod 33 of the measuring cylinder mechanism are retained at a top dead-center by actuating a lock mechanism 21 and that a lower rod 35 which elevates again, comes into contact with the upper rod 33 to upthrow it after it separates from the upper rod 33 once, if the upper rod 33 and the piston are retained at a lower position than the accurate top dead-center. Further, the lock mechanism 21 can elevate against the horizontal section 24A of a rotator and a shock at the time of the elevation is absorbed by a spring 57. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fixed-quantity filling device, and more particularly, to a fixed-quantity filling device capable of preventing a measuring cylinder mechanism or the like from being damaged when performing a no-bottle no-filling process.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a fixed-quantity filling apparatus that performs a so-called “no-bottle / no-filling process” is known in which a filling liquid is not discharged from a nozzle when no container is present on a bottle stand (for example, Patent Document 1).
The device of Patent Document 1 has the following configuration. In other words, a measuring cylinder mechanism that sucks the filling liquid into the cylinder and discharges the filling liquid into the container by raising and lowering the piston, an upper rod connected to the piston of the measuring cylinder mechanism, and a lower rod that is raised and lowered by lifting means, A lock mechanism that holds the upper rod, and when there is no container to be filled with the filling liquid, the upper rod and the lower rod are separated by operating the lock mechanism to hold the upper rod. The structure is such that the filling liquid is not discharged from the cylinder mechanism.
More specifically, in the device of Patent Document 1, the lock mechanism communicates with a supply source of compressed air through a three-way switching valve, and switches the flow path of the three-way switching valve when necessary to thereby lock the locking mechanism. Compressed air is discharged from the pressure chamber. Thus, the upper rod and the piston are locked by the lock ring of the lock mechanism and held at the top dead center.
Since the lower rod is lowered by the elevating means from the state in which the upper rod and the piston are held at the top dead center, the lower rod is separated from the upper rod and descends to the bottom dead center, and then the lower rod is again raised. By ascending to the dead center position C, the lower rod and the upper rod that have been separated from each other come into contact with each other. At this time, by supplying compressed air to the pressure chamber of the lock mechanism, the lock of the upper rod and the piston by the lock mechanism is released.
By performing such processing, when the container to be filled is not on the bottle base, the filling liquid is prevented from being discharged to the bottle base.
[Patent Document 1]
Japanese Patent Publication No. 61-54669
[0003]
[Problems to be solved by the invention]
However, when the compressed air is not immediately discharged from the pressure chamber of the lock mechanism when the three-way switching valve is operated in the conventional device, or the response of the spring that urges the lock ring is poor, the upper rod is locked with the lock ring. If the holding timing is delayed, the upper rod and the piston of the measuring cylinder mechanism are held at a position (height) slightly lower than the top dead center.
In this case, after the piston and the upper rod are held, once the lower rod rises to the top dead center again after separating from the upper rod, the upper end of the lower rod collides with the lower end of the upper rod. Push up the upper rod. Therefore, in this case, there is a disadvantage that the upper rod, the lower rod, the measuring cylinder mechanism, and the lock mechanism are damaged.
[0004]
[Means for Solving the Problems]
In view of such circumstances, the present invention provides a measuring cylinder mechanism that sucks a filling liquid into a cylinder and discharges the filling liquid into a container by a lifting and lowering operation of a piston, an upper rod connected to a piston of the measuring cylinder mechanism, and a lifting / lowering unit. A lower rod to be raised and lowered, and a lock mechanism for holding the upper rod when required, and when there is no container to be filled with the filling liquid, the lock mechanism is operated to hold the upper rod, thereby operating the upper rod. In the fixed quantity filling device configured to separate the rod and the lower rod so as not to discharge the filling liquid from the cylinder mechanism,
When the lower rod abuts on the upper rod held by the lock mechanism and pushes up the upper rod, the lock mechanism holding the upper rod can be raised, and the lock mechanism is raised. In this case, a shock absorbing member is provided to absorb the impact of the shock.
According to such a configuration, when the upper rod and the piston are held at a position lower than the accurate top dead center when the upper rod and the piston are held by the lock mechanism, the upper rod and the piston are separated from the upper rod and then again. The raised lower rod abuts the upper rod and pushes it up. At this time, since the lock mechanism and the upper rod held by the lock mechanism can be lifted, it is possible to prevent the upper rod and the lower rod from abutting against each other, and furthermore, the upper rod and the lock mechanism are pushed up by the buffer member. It can absorb the shock when it is used.
Therefore, when the upper rod and the lower rod once separated from each other come into contact again as described above, it is possible to prevent the two rods and the portion interlocked with them from being damaged.
Therefore, damage to the measuring cylinder mechanism, both rods, and the lock mechanism can be favorably prevented.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described below with reference to the illustrated embodiment. In FIGS. 1 to 3, reference numeral 1 denotes a rotary fixed quantity filling apparatus for filling a predetermined amount of a filling liquid into a container 2. The rotary quantitative filling apparatus 1 includes a rotating body 3 that is continuously rotated in a predetermined direction, and a bottle base 4 and a filling nozzle 5 are arranged at equal intervals in a circumferential direction of the rotating body 3. A measuring cylinder mechanism 6 for sucking and discharging a predetermined amount of the filling liquid is provided for each nozzle 5.
Before the detailed description of the rotary quantitative filling apparatus 1, first, a schematic operation when the container 2 is filled with the filling liquid will be described. That is, when the empty containers 2 are conveyed to the position adjacent to the rotary fixed-quantity filling device 1 by the conveyor 7, the respective containers 2 are separated from each other by a timing screw 9 at a predetermined interval. Then, at the supply position A, the supply star wheel 8 is used to sequentially supply one by one to each bottle base 4 of the rotary quantitative filling apparatus 1.
As shown in FIG. 1, a detector 18 for detecting the presence or absence of the container 2 is disposed at the position of the timing screw 9. The detector 18 detects whether or not the container 2 to be supplied to the bottle base 4 exists at the supply position A, and the detection result is input to the control device 19.
[0006]
After the container 2 is supplied at the supply position A, the bottle base 4 is raised from the lower end position to the upper end position by the first fixed cam 11 with the rotation of the rotating body 3, so that the bottle base 4 is placed on the bottle base 4. The lower end of the nozzle 5 is inserted into the container 2 thus set.
By this time, the piston 14 of the measuring cylinder mechanism 6 has been lowered from the top dead center to the bottom dead center by the interlocking mechanism 12 and the second fixed cam 13, so that the filling liquid in the filling liquid tank (not shown) is supplied. It is sucked into the cylinder 17 via the passage 15 and the three-way switching valve 16 (the state of the measuring cylinder mechanism 6 shown on the left side in FIG. 3).
When the bottle base 4 and the container 2 placed thereon move in the filling section of FIG. 1 with the rotation of the rotating body 3, the piston 14 of the measuring cylinder mechanism 6 interlocks with the second fixed cam 13 and the interlocking mechanism 12. Rises from the bottom dead center to the top dead center, the filling liquid in the cylinder 17 is discharged toward the nozzle 5, and the container 2 is filled with a predetermined amount of the filling liquid via the nozzle 5.
By the time the bottle 4 and the container 2 reach the end point of the filling section, the presence or absence of the container 2 to be supplied to the supply position A is transmitted to the control device 19 by an input from the detector 18. When the container 2 is present, the control device 19 does not operate the lock mechanism 21 corresponding to the bottle base 4 located at the top dead center position C. Therefore, the piston 14 of the measuring cylinder mechanism 6 corresponding to the gantry 4 passing through the top dead center position C is thereafter lowered from the top dead center to the bottom dead center by the second fixed cam 13 and the interlocking mechanism 12. Therefore, the filling liquid to be filled into the next container 2 is sucked into the cylinder 17 of the measuring cylinder mechanism 6.
As will be described later in detail, when it is input from the detector 18 to the control device 19 that the container 2 to be supplied next to the supply position A does not exist, the lock mechanism 21 is operated by the control device 19 and The piston 14 is held at the top dead center. As a result, the filling liquid is prevented from being sucked into the piston 14 of the measuring cylinder 6 corresponding to the bottle table 4 that has moved to the supply position A and on which the container 2 is not placed. The filling liquid is not discharged from the nozzle 5 to the table 4. The lock mechanism 21 that locks the piston 14 and holds it at the top dead center is released when the rotating body 3 makes one rotation and reaches the top dead center of the piston 14 again. I have.
When the filled container 2 and the bottle base 4 have passed the filling section, the first fixed cam 11 lowers the bottle 4 and the container 2 placed thereon from the raised end position to the lowered end position. The part is relatively withdrawn from inside the container 2.
As described above, a predetermined amount of the filling liquid is filled in the container 2 on the bottle base 4 by each measuring cylinder mechanism 6 with the rotation of the rotating body 3, and the container 2 after the filling is discharged. At the position B, the paper is discharged from the bottle base 4 onto the conveyor 7 by the discharge star wheel 20.
[0007]
When the container 2 is not present on the bottle base 4, the rotary quantitative filling device 1 of the present embodiment is configured so that the filling liquid is not discharged from the nozzle 5 on the bottle base 4 where the container 2 does not exist. A so-called "no bottle no filling process" can be performed.
As shown in FIGS. 3 and 5, the rotating body 3 of the rotary quantitative filling device 1 includes a pair of upper and lower disc-shaped members 22, 23, and is disposed between the two disc-shaped members 22, 23. And a cylindrical member 24 having a stepped cylindrical shape in which are integrally connected. The cylindrical portion 23A formed in the center of the lower surface of the disc-shaped member 23 is inserted into the cylindrical portion 25A of the frame 25, and the cylindrical portion 23A, The rotating body 3 is rotatably supported.
A gear 27 is attached to the outer periphery of the disc-shaped member 23, and the gear 27 is meshed with a motor-side gear (not shown). Thus, when the motor is rotationally driven by the control device 19, the rotating body 3 is rotated clockwise as shown in FIG.
[0008]
A through-hole 23a is formed in the disk-shaped member 23 at an equal interval in the circumferential direction, and a cylindrical guide 30 is connected to the lower surface of the disk-shaped member 23 in accordance with the position of the through-hole 23a.
The center of the lower surface of the bottle base 4 is connected to the upper end of a rod 28, and the lower outer periphery of the rod 28 is slidably fitted in the through hole 23a and the cylindrical guide 30. A spring is provided on the inner peripheral portion of the cylindrical guide 30, and the spring constantly urges the rod 28 and the gantry 4 connected thereto upward.
A cam follower 29 is attached to the lower end of the rod 28. The cylindrical guide 30 has a notch in the vertical direction (not shown) that allows the cam follower 29 to move up and down. Thus, the rod 28 and the gantry 4 connected thereto can be moved up and down by being guided by the cylindrical guide 30.
The annular first fixed cam 11 is connected to the frame 25 so as to surround the gear 27 of the disc-shaped member 23. Since the cam follower 29 of each rod 28 is urged upward by a spring disposed in the cylindrical guide 30, the cam follower 29 is engaged with the first fixed cam 11 from below. Therefore, when the rotating body 3 is rotated, the gantry 4 connected to the upper end of each rod 28 can be moved up and down along the cam curve of the first fixed cam 11 between the raised end position and the lowered end position.
[0009]
That is, the bottle base 4 is raised by the first fixed cam 11 from the lower end position to the upper end position after passing the supply position A with the rotation of the rotating body 3, and is held at the upper end position in the filling section. Then, the bottle base 4 is lowered by the first fixed cam 11 from the rising end position to the falling end position in the moving section to the discharge position B after passing the filling section, and thereafter, until passing through the supply position A. It is located at the lower end position.
Next, the nozzle 5 is attached vertically downward to the outer peripheral portion of the disk-shaped member 22 located immediately above each of the bottle bases 4, and the measuring cylinder mechanism 6 is attached to the disk-shaped member 22 for each nozzle 5. Attached to.
Each of the measuring cylinder mechanisms 6 includes the cylinder 17 mounted vertically on the outer peripheral portion of the disc-shaped member 22 and the piston 14 fitted in the cylinder 17 so as to ascend and descend while maintaining liquid tightness. Have. The cylinder 17 of each measuring cylinder mechanism 6 communicates with a filling liquid tank (not shown) via a three-way switching valve 16 and a liquid supply passage 15. When the three-way switching valve 16 is at the first position, the filling liquid can be sucked into the cylinder 17 from the filling liquid tank. In this state, the piston 14 is top dead by the interlocking mechanism 12 and the second fixed cam 13. Since it is lowered from the point to the bottom dead center, a predetermined amount of the filling liquid is sucked into the cylinder 17.
On the other hand, when the three-way switching valve 16 is at the second position, the communication between the cylinder 17 and the filling liquid tank is prevented, while the filling liquid can be discharged from the cylinder 17 toward the nozzle 5. When the three-way switching valve 16 is at the second position, the piston 14 is raised from the bottom dead center to the top dead center by the interlocking mechanism 12 and the second fixed cam 13, so that the charge sucked into the cylinder 17 is The liquid is discharged toward the nozzle 5 and filled into the container 2 through the nozzle 5.
[0010]
Next, the interlocking mechanism 12 disposed between each measuring cylinder mechanism 6 and the second fixed cam 13 will be described. As shown in FIGS. 3 to 5, the interlocking mechanism 12 includes an urging cylinder mechanism 32 attached to the horizontal portion 24 </ b> A of the cylindrical member 24 and the lower rotating member 23. The piston 14 of the measuring cylinder mechanism 6 is connected to the upper rod 33.
The urging cylinder mechanism 32 includes a cylindrical housing 34 disposed over the horizontal portion 24A and the lower disk-shaped member 23, and the upper rod 33 is inserted into the housing 34. A cylindrical piston 35 is formed below the upper rod 33, and the piston 35 is slidably fitted to the housing 34. A spherical portion 36A provided at the upper end of the lower rod 36 is slidably fitted into the piston 35 and is brought into contact with the piston 35. The cam follower 37 attached to the lower end of the lower rod 36 is placed on the cam surface of the second fixed cam 13.
[0011]
Thus, the piston 14 of the measuring cylinder mechanism 6 is linked to the second fixed cam 13 via the upper rod 33, the piston 35, the spherical portion 36A, the lower rod 36, and the cam follower 37 of the urging cylinder mechanism 32.
In this embodiment, the piston 14 of each measuring cylinder mechanism 6 is moved up and down only once by the second fixed cam 13 during one rotation of the rotating body 3 in the clockwise direction. That is, the piston 14 of the measuring cylinder mechanism 6 is positioned at the bottom dead center at the bottom dead center position D at a position slightly after the supply position A in the rotation direction of the rotating body 3 (see FIG. 1). The piston 14 is raised from the point position D to position the piston 14 at the top dead center at a top dead center position C slightly before the discharge position B (see FIG. 1). 14 is lowered so as to reach the bottom dead center at the bottom dead center position D.
That is, the piston 14 is raised from the bottom dead center to the top dead center by the second fixed cam 13 in the charging section in which the rotating body 3 makes a half rotation, and in the subsequent section in which the rotating body 3 makes a half rotation, the piston 14 is From the point to the bottom dead center.
When the lower rod 36 of the interlocking mechanism 12 is lowered in conjunction with the second fixed cam 13, compressed air is supplied into the pressure chamber 38 of the urging cylinder mechanism 32 via the first three-way switching valve 39. As a result, the piston 35 is urged downward, whereby the spherical portion 36A of the lower rod 36 is brought into contact with the piston 35 so as to be integrally lowered. On the other hand, when the lower rod 36 is raised by the second fixed cam 13, that is, in the filling section, the compressed air in the pressure chamber 38 of the urging cylinder mechanism 32 is discharged through the first three-way switching valve 39. By doing so, the spherical portion 36A of the lower rod 36 and the piston 35 can be smoothly raised without applying unnecessary pressure.
[0012]
A first three-way switching valve 39 is provided for each of the urging cylinder mechanisms 32 in order to supply and discharge compressed air to and from the pressure chambers 38 of the respective urging cylinder mechanisms 32. As shown in FIG. 2, a flow path switching box 41 is arranged between adjacent bottle bases 4 on the disk-shaped member 23. A lever 42 for switching the flow path of each first three-way switching valve 39 is attached to the flow path switching box 41 so as to protrude in the radial direction of the rotating body 3.
Two switching cams 43 and 44 are provided at predetermined positions on the movement trajectory of the lever 42, and the first three-way switching is performed by bringing the lever 42 into contact with the respective switching cams 43 and 44. The switching operation of the flow path of the valve 39 is performed.
As shown in FIG. 1, the one switching cam 43 is fixedly provided at a bottom dead center position D where the piston 14 of the measuring cylinder mechanism 6 becomes a bottom dead center, and the other switching cam 44 has the piston 14 It is provided so as to be able to advance and retreat at a top dead center position C serving as a dead center.
When the fixedly provided switching cam 43 comes into contact with the lever 42, the first three-way switching valve 39 is always located at the first position, and the first three-way switching valve 39 is in the first position. When in the position, compressed air is not supplied to the pressure chamber 38 and the pressure chamber 38 is opened to the atmosphere.
On the other hand, the switching cam 44 is moved between an advanced position and a retracted position via an actuator (not shown) operated by the control device 19. When the control device 19 inputs the presence of the container 2 placed on the bottle base 4 by the detector 18 for detecting the presence or absence of the container 2 described above, the control device 19 moves the switching cam 44 forward through the actuator. Position. When the switching cam 44 is moved forward, the lever 42 is engaged with the switching cam 44 to position the first three-way switching valve 39 at the second position. When the first three-way switching valve 39 is at the second position, communication between the pressure chamber 38 and the atmosphere is cut off, and compressed air is supplied to the pressure chamber 38. In this case, thereafter, the upper rod 33 urged downward by the compressed air is lowered by the second fixed cam 13 integrally with the lower rod 32.
On the other hand, when the detector 18 inputs to the controller 19 that the container 2 to be placed on the bottle base 4 does not exist, the controller 19 moves the switching cam 44 to the retracted position via the actuator. When the switching cam 44 is located at the retracted position, the lever 42 is engaged with the switching cam 44 to position the first three-way switching valve 39 at the first position. When the first three-way switching valve 39 is at the first position, the pressure chamber 38 is opened to the atmosphere and compressed air is not supplied to the pressure chamber 38. That is, in this case, the upper rod 33 is not urged downward by the compressed air.
[0013]
Next, the rotary quantitative filling device 1 is provided with a lock mechanism 21 for each of the interlocking mechanisms 12. When the detector 18 detects that the container 2 is not placed on the bottle base 4, the lock mechanism 21 is activated. The upper rod 33 and the piston 14 of the interlocking mechanism 12 corresponding to the bottle base 4 are held at the top dead center by the lock mechanism 21.
As shown in FIGS. 4 to 6, the lock mechanism 21 includes a cylindrical housing 45, and the housing 45 is fitted to an upper inner peripheral portion of the housing 34 of the interlocking mechanism 12. In this manner, the two housings 45 and 34 are integrally connected, and the housing 34 of the interlocking mechanism 12 is inserted into the through hole 24B of the horizontal portion 24A with a slight play from above, and the housing 45 of the lock mechanism 21 is inserted. A flange portion 45A formed on the upper end of the horizontal portion is placed on the horizontal portion 24A from above. Thus, in the present embodiment, the housing 34 and the upper rod 33 of the lock mechanism 21 and the interlocking mechanism 12 can be raised with respect to the horizontal portion 24A, that is, the rotating body 3.
[0014]
As shown in FIG. 6, the lock mechanism 21 is provided with a swinging piston 47 provided in the housing 45 so as to be swingable about a fulcrum 46, and the locking mechanism 21 is provided so as to overlap the swinging piston 47. And a lock ring 49 which is urged upward by a spring 48 disposed on the opposite side.
When compressed air is introduced into the pressure chamber 51 formed by the oscillating piston 47 and the housing 45 via the second three-way switching valve 52, the oscillating piston 47 resists the elastic force of the spring 48. And the lock ring 49 can be held in the state shown in FIG. In this state, the upper rod 33 of the urging cylinder mechanism 32 slidably penetrates the housing 45 and freely penetrates through a through hole 49A formed at the center of the lock ring 49, so that the second fixed cam 13 It can be moved up and down along the cam curve.
On the other hand, when the compressed air is discharged from the pressure chamber 51 through the second three-way switching valve 52, the lock ring 49 and the oscillating piston 47 are lifted obliquely upward about the fulcrum 46 by the elastic force of the spring 48. Then, the through hole 49A of the lock ring 49 comes into contact with the upper rod 33. As a result, the upper rod 33 is locked by the lock ring 49 and held at that position. That is, the piston 14 of the measuring cylinder mechanism 6 is also locked.
In this embodiment, when the container 2 to be filled is not on the bottle base 4, the upper rod 33 and the piston 14 are locked and held at the top dead center by the lock mechanism 21.
[0015]
A switching lever 53 for switching the operation of the second three-way switching valve 52 is disposed on the flow path switching box 41 so as to protrude radially outward. A pair of upper and lower movable cams 54 and 55 are provided at a top dead center position C close to the movement locus of the switching lever 53 so as to be able to advance and retreat, and their operation is controlled by the control device 19 via an actuator (not shown). It has become so.
That is, when the presence of the container 2 supplied to the bottle base 4 is input from the detector 18, the control device 19 positions the two movable cams 54 and 55 at the normal position. In this normal position, the movable cam 54 is located at the forward position, while the movable cam 55 is located at the retracted position. When the movable cams 54 and 55 are at the normal position, the switching lever 53 abuts on the movable cams 54, and the second three-way switching valve 52 is located at the first position. At this time, communication between the pressure chamber 51 and the atmosphere is blocked, and compressed air is introduced into the pressure chamber 51, so that the upper rod 33 is not locked.
On the other hand, when it is detected by the detector 18 that the container 2 to be placed on the bottle base 4 does not exist, and this is input to the control device 19, the control device 19 transmits the information via an actuator (not shown). The movable cams 54 and 55 are positioned at abnormal positions. At the abnormal position, the movable cam 54 is located at the retracted position and the movable cam 55 is located at the forward position, contrary to the case of the normal position. When the movable cams 54 and 55 are in the abnormal positions as described above, the switching lever 53 comes into contact with these movable cams 54, and the second three-way switching valve 52 is located at the second position. Then, the pressure chamber 51 is opened to the atmosphere, and the supply of the compressed air to the pressure chamber 51 is stopped. Therefore, the compressed air is discharged from the pressure chamber 51 of the lock mechanism 21 via the second three-way switching valve 52 and the pipe 56. That is, the upper rod 33 and the piston 14 of the measuring cylinder mechanism 6 are locked by the lock ring 49 and held at the top dead center.
When the upper rod 33 and the piston 14 are held at the top dead center by the lock mechanism 21 as described above, when the lower rod 36 subsequently moves down in conjunction with the second fixed cam 13, the upper rod held at the top dead center is lowered. By lowering the lower rod 36 with respect to 33, they are separated from each other, and only the lower rod 36 is lowered to the bottom dead center. Therefore, the filling liquid is not sucked into the cylinder 17 of the measuring cylinder mechanism 6 corresponding to the bottle base 4 having no container 2. After that, when the lower rod 36, which has been raised again by the second fixed cam 13 with the rotation of the rotating body 3, is raised to the top dead center, the upper end thereof is again connected to the upper rod 33 which has been separated therefrom. It comes into contact. If it is input to the control device 19 from the detector 18 that the container 2 to be filled next exists before the contact, the control device 19 moves the movable cams 54 and 55 from the abnormal position to the normal position. Switch. Thereby, the holding state of the upper rod 33 by the lock mechanism 21 is released.
[0016]
By the way, when the upper rod 33 and the piston 14 of the measuring cylinder mechanism 6 are locked and held at the top dead center by the lock mechanism 21 as described above, the upper rod 33 and the piston 14 are accurately positioned at the top dead center for some reason. There is a case where the lock mechanism 21 is locked and held at a slightly lower height.
In this case, when the lower rod 36 is lowered by the second fixed cam 13 with the rotation of the rotating body 3 and once separated from the upper rod 33, when the lower rod 36 is again raised to the top dead center. The upper end of the spherical portion 36A collides with the upper rod 33 (the upper end of the piston 35) held at a position lower than the top dead center.
Therefore, in the present embodiment, as described above, the lock mechanism 21 and the upper rod 33 of the interlocking mechanism 12 can be raised with respect to the horizontal portion 24A. With such a structure, when the lower rod 36 that has risen again after being separated from the upper rod 33 held at a position lower than the top dead center comes into contact with the upper rod 33, the lock mechanism 21. By raising the upper rod 33 and the housing 34 of the interlocking mechanism 12 with respect to the horizontal portion 24A, it is possible to prevent the rods 33, 36 from being damaged by absorbing the shock generated by a sudden collision. ing.
Further, as shown in FIGS. 3 to 6, in the present embodiment, the lower rod 36 abuts on the upper rod 33 and is pushed up to cushion the shock when the lock mechanism 21 is raised with respect to the rotating body 3. A spring 57 is provided. As shown in FIG. 6, a vertical through hole is formed in the flange portion 45A of the housing 45 of the lock mechanism 21, and a pin 58 is passed through the through hole from the upper side. Is fitted to the horizontal portion 24A of the rotating body 3. A spring 57 is elastically mounted between the head of the pin 58 and the flange 45A of the housing 45, and constantly biases the flange 45 downward toward the horizontal portion 24A.
As described above, when the lower rod 36 is once moved up again after being separated from the upper rod 33 and comes into contact with the upper rod 33, the housing 34 of the lock mechanism 21 and the interlocking mechanism 12 and the upper rod 33 are pushed up. By compressing the spring 57, the shock caused by the lock mechanism 21 and the upper rod 33 of the interlocking mechanism 12 being pushed upward can be absorbed. As a result, the upper rod 33 held by the lock mechanism 21 at a height lower than the top dead center is once separated from the abnormal state as described above, and then rises again to the top dead center, and the lower rod The lock mechanism 21, the measuring cylinder mechanism 6 and the interlocking mechanism 12 can be prevented from being damaged when the abutment occurs.
[0017]
Further, as shown in FIG. 5, a detection means 59 capable of detecting that the lock mechanism 21 and the interlocking mechanism 12 are pushed upward from the horizontal portion 24A is provided. The detection means 59 includes an engagement plate 61 erected on the upper surface of the housing 45 of the lock mechanism 21 and a limit switch 62 disposed horizontally on the horizontal portion 24A via a bracket. The upper end of the engagement plate 61 is slightly inclined to form an inclined portion, and the lower side thereof is a vertical portion supported vertically. The tip of the limit switch 62 is in contact with the inclined portion, which is the upper end of the engagement plate 61.
Thus, when the lock mechanism 21 is raised with respect to the horizontal portion 24A in the above-described abnormal situation, the limit switch 62 is retracted by the vertical portion of the engagement plate 61. The result of detection by the limit switch 62 is input to the control device 19. When the control device 19 receives an input that the limit switch 62 has been retracted by the engagement plate 61, an abnormal situation occurs in the lock mechanism 21 and the interlocking mechanism 12. As a result, the operation of the rotary filling device 1 is immediately stopped. At the same time, the control device 19 displays on the display screen that an abnormal situation has occurred in the interlocking mechanism 12 and the lock mechanism 21.
[0018]
----------- (Operation explanation)
In the above configuration, when the rotating body 3 is rotated in the direction of the arrow in a state where the movable cam 44 is at the forward position and the movable cams 54 and 55 are at the normal position, the supply star wheel 8 at the supply position A The container 2 is supplied onto the bottle base 4. The presence or absence of the container 2 to be supplied to the bottle base 4 at the supply position A is sequentially detected by the detector 18 and input to the control device 19, and is controlled by the detector 18 as long as the container 3 exists. The device 19 does not operate the movable cam 44 and the movable cams 54 and 55. Therefore, when the container 2 to be filled with the filling liquid is present on each bottle base 4, the upper rod 33 is not locked by the lock mechanism 21, and the measuring cylinder is linked with the second fixed cam 13. Both rods 33 and 36 of the mechanism 6 can be moved up and down integrally.
When the container 2 is supplied to the bottle 4 at the supply position A, the container 4 is then placed on the container 4 and the first fixed cam 11 moves the lower stage 4 from the lower end position to the upper end position with the rotation of the rotating body 3. Since the bottle 4 is raised, the lower end of the nozzle 5 is inserted into the container 2 on the bottle 4 with the rise of the bottle 4.
By this time, the piston 14 of the measuring cylinder mechanism 6 has been lowered to the bottom dead center by the second fixed cam 13 via the interlocking mechanism 12, whereby a predetermined amount of the filling liquid is sucked into the cylinder 17. ing.
Further, when the gantry 4 enters the filling section with the rotation of the rotating body 3, the piston 14 is raised from the bottom dead center to the top dead center by the second fixed cam 13 via the interlocking mechanism 12. When the switching cam 43 provided at the bottom dead center position D contacts the lever 42, the pressure chamber 38 of the interlocking mechanism 12 is opened to the atmosphere, and the supply of compressed air is stopped. Therefore, the upper rod 33 and the lower rod 36 are quickly moved together as one. Thereby, the filling liquid in the cylinder 17 is discharged toward the nozzle 5, and is filled into the container 2 through the nozzle 5.
Here, when the piston 14 of the measuring cylinder mechanism 6 reaches the top dead center via the interlocking mechanism 12 and the filling is completed, the result of the detection by the detector 18 indicates that there is the next container 2 to be filled. When it is input to the device 19, the control device 19 maintains the switching cam 44 at the forward position and maintains the switching cams 54 and 55 at the normal position. Therefore, the lever 42 comes into contact with the switching cam 44 that is moving forward, and the first three-way switching valve 39 is switched to the first position, so that compressed air is introduced into the pressure chamber 38 of the urging cylinder mechanism 32. The upper rod 33, the lower rod 36, and the piston 14 integrally descend to the bottom dead center under the urging force of the compressed air, and the filling liquid is sucked into the cylinder 17 accordingly.
On the other hand, the container 2 already filled with the filling liquid is discharged onto the conveyor 7 by the discharge star wheel 20 at the discharge position B.
[0019]
By the way, as described above, when the bottle base 4 and the container 2 move to the top dead center position C which is the last of the filling section with the rotation of the rotating body 3, the container 18 to be filled next is detected by the detector 18. Is input to the control device 19, the control device 19 positions the movable cam 44 at the retracted position and simultaneously positions the movable cams 54 and 55 at the abnormal position. Thereby, the supply of the compressed air to the pressure chamber 38 of the interlocking mechanism 12 is stopped, and the pressure chamber 38 is opened to the atmosphere. At the same time, the second three-way switching valve 52 is switched to the second position by the movable cams 54 and 55 located at the abnormal position. As a result, the compressed air is discharged from the pressure chamber 51 of the lock mechanism 21, and the upper rod 33 and the piston 14 are fixed and held at the top dead center by the lock mechanism 21.
In this state, the lower rod 36 descends to the bottom dead center by the second fixed cam 13 with the rotation of the rotating body 3 thereafter, is separated from the upper rod 33, and then rises again. The rod 33 is held at the top dead center. Therefore, the filling liquid is not discharged from the nozzle 5 toward the bottle base 4 where the container 2 does not exist.
[0020]
By the way, when the lock mechanism 21 attempts to hold the upper rod 33 and the piston 14 at the top dead center, the upper rod 33 and the piston 14 are at a position (height) slightly lower than the correct top dead center for some reason. In this case, the lower rod 36 that has once descended and separated from the upper rod 33 and then raised again contacts the held upper rod 33 and pushes the upper rod 33 upward. become.
In this case, in the present embodiment, the housing 34 and the upper rod 33 of the lock mechanism 21 and the interlocking mechanism 12 are raised with respect to the horizontal portion 24A, and the impact when they are raised is absorbed by the spring 57. You. Therefore, even when such an abnormal situation occurs, it is possible to satisfactorily prevent the lock mechanism 21, the measuring cylinder mechanism 6, and the interlocking mechanism 12 from being damaged.
Then, when the lock mechanism 21 is raised, the fact is detected by the engagement plate 61 retreating the limit switch 62 and is input to the control device 19. Then, the control device 19 immediately stops the operation of the rotary filling device 1 and displays on the display screen that an abnormal situation has occurred in the interlocking mechanism 12.
[0021]
As described above, according to the present embodiment, when an abnormal situation occurs in which the upper rod 33 and the piston 14 are locked at a position (height) lower than the accurate top dead center, the upper rod 33 and the piston 14 are temporarily stopped. Even if the lower rod 36, which has been separated and descended and then ascended, contacts the upper rod 33 and pushes it up, the lock mechanism 21 and the upper rod 33 are raised and the spring 57 is compressed, so that The impact when the rods 33 and 36 abut can be absorbed. Therefore, even when such an abnormal situation occurs, the measuring cylinder mechanism 6, the lock mechanism 21, and the interlocking mechanism 12 can be favorably prevented from being damaged. Further, when the above-described abnormal situation occurs, the control device 19 can immediately determine that the abnormal situation has occurred based on a signal from the limit switch 62.
In the above embodiment, the housing 45 of the lock mechanism 21 is integrally connected to the housing 34 of the interlocking mechanism 12, and when the above-described abnormal situation occurs, the housing 45 of the lock mechanism 21, the interlocking mechanism 12, and the upper rod are connected. Although 33 is raised with respect to the horizontal portion 24A, the following configuration may be used. That is, the upper end of the housing 34 of the interlocking mechanism 12 is fixed to the through hole 24B of the horizontal portion 24A, while the housing 45 of the lock mechanism 21 is slidably fitted to the housing 45 of the interlocking mechanism 12 from above. When an abnormal situation occurs, the lock mechanism 21 and the upper rod 33 may be raised with respect to the horizontal portion 24A and the housing 45 of the interlocking mechanism 12.
[0022]
【The invention's effect】
As described above, according to the present invention, it is possible to prevent the measuring cylinder mechanism, both rods, and the lock mechanism from being damaged.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing one embodiment of the present invention.
FIG. 2 is a plan view showing a positional relationship between the bottle base 4 and a flow path switching box 41 in the embodiment shown in FIG.
FIG. 3 is a sectional view of the rotary fixed-quantity filling device shown in FIG.
FIG. 4 is a sectional view of a main part of FIG. 3;
FIG. 5 is an enlarged view of a main part of FIG. 3;
FIG. 6 is an enlarged sectional view of a main part of FIG. 3;
[Explanation of symbols]
1. Rotary quantitative filling device 2. Container
3 ... rotating body 4 ... bottle stand
5 Nozzle 6 Measurement cylinder mechanism
21: Lock mechanism 33: Upper rod
32: urging cylinder mechanism 36: lower rod

Claims (2)

A measuring cylinder mechanism that sucks the filling liquid into the cylinder and discharges the filling liquid into the container by raising and lowering the piston; an upper rod connected to the piston of the measuring cylinder mechanism; a lower rod that is raised and lowered by lifting means; When there is no container to be filled with the filling liquid, the lock mechanism is operated to hold the upper rod, thereby separating the upper rod and the lower rod from each other and holding the cylinder. In a fixed quantity filling device configured not to discharge the filling liquid from the mechanism,
When the lower rod abuts on the upper rod held by the lock mechanism and pushes up the upper rod, the lock mechanism holding the upper rod can be raised, and the lock mechanism is raised. A fixed-quantity filling device provided with a shock absorbing member for absorbing a shock at the time of the filling. The fixed-quantity filling device according to claim 1, further comprising a detection unit that detects that the lock mechanism has been raised.

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