JP5984683B2 - Liquid filling device - Google Patents

Description

  The present invention relates to a liquid filling apparatus.

  As a conventional liquid filling device, the opening degree of the filling valve is configured to be switchable between two stages of a large flow rate and a small flow rate, and up to a certain amount of liquid, the filling valve is opened wide and filled at a high flow rate with a high flow rate. Then, the thing of the structure which can reduce the opening degree of a filling valve and can fill with a small flow rate with sufficient precision is known (for example, refer to patent documents 1).

  The liquid filling device described in Patent Document 1 adjusts the flow rate adjusting unit (adjustment screw) for large flow rate, thereby changing the retracting stroke of the retracting rod in the large flow rate control cylinder, thereby the filling valve. The opening at the time of a large flow rate is adjusted. In addition, by adjusting the flow rate adjustment section (adjustment screw) for small flow rate, the retracting stroke of the retracting rod in the small flow rate control cylinder is changed, thereby adjusting the opening of the filling valve at the small flow rate. The

JP 2009-179323 A

  However, in the liquid filling device described in Patent Document 1, since the opening adjustment of the filling valve is performed by the operator manually adjusting the flow rate adjustment unit, when changing the liquid filling condition, Each time, the operator had to manually adjust the opening of the filling valve while watching how the liquid came out. Further, in the case of a multiple liquid filling device, the filling speed varies among the filling nozzles, so that the operator has to manually adjust the opening degree of the filling valve frequently. For this reason, the liquid filling apparatus described in Patent Document 1 requires a lot of labor and time for the liquid filling operation.

  As a method for coping with such a problem, it is conceivable that the adjustment of the flow rate adjusting unit is driven by an electric motor such as a stepping motor or a servo motor.

  However, in a filling operation under a dangerous atmosphere where flammable liquid is to be filled, there is a risk of causing a fire if a spark caused by the electric motor occurs. There has been a problem that the liquid filling apparatus for adjustment cannot be used in the filling operation.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and can automatically adjust the opening degree of a filling valve (adjustment of a flow rate adjusting unit) and can be used even in a filling operation in a hazardous atmosphere. The purpose is to provide.

  In order to solve the above-described problem, a liquid filling apparatus according to a first aspect of the present invention includes a filling valve that opens and closes a filling port at a leading end of a filling nozzle, and the filling valve is attached to a leading end portion, and moves away from the filling valve. The flow control cylinder has a drive rod for driving the filling valve whose opening degree is adjusted, a flow control cylinder having a retractable rod connected to the drive rod so that the drive rod can be moved back and forth, and a retractable rod of the flow control cylinder. A flow rate adjusting unit that is provided so as to be able to contact and adjusts a retracting stroke of the retracting rod by changing a contact position with the retracting rod, and the flow rate adjusting unit is provided on the retracting rod. A contact member that can be contacted, a drive shaft that is screwed into the contact member and rotated in the forward and reverse directions, and forward and reverse rotation means that is driven by a driving fluid. Rotated alternately in forward and reverse directions A forward rotation transmitting means for transmitting only the forward rotational force to the drive shaft from the alternating rotational force in the forward and reverse directions of the rotating shaft, and the reverse from the alternating rotational force in the forward and reverse directions of the rotational shaft. A reverse rotation transmission means for transmitting only the rotational force in the direction to the drive shaft, and the rotation of the rotation shaft can be selectively transmitted to the forward rotation transmission means or the reverse rotation transmission means, which is switched by the driving fluid. Switching means.

  According to the above configuration, the forward rotation transmission path that transmits only the forward rotation to the drive shaft and the reverse rotation are transmitted to the drive shaft from the forward and reverse rotations generated by the driving fluid. The drive shaft can be selectively rotated in the forward direction or the reverse direction by switching and selecting the reverse direction rotation transmission path by switching means that operates with the driving fluid.

  The liquid filling apparatus according to the second invention is the liquid filling apparatus according to the first invention, wherein the forward direction rotation transmission means and the reverse direction rotation transmission means are each constituted by a one-way clutch gear. .

  Furthermore, the liquid filling apparatus according to the third invention is the liquid filling apparatus according to the first or second invention, wherein the flow control cylinder is provided with a large flow control cylinder and a small flow control cylinder. The retractable rod of the large flow rate control cylinder and the retractable rod of the small flow rate control cylinder are configured to be interlocked with each other, and the retractable rod of the large flow rate control cylinder and the retractable rod of the small flow rate control cylinder are configured. Corresponding to the above, a flow rate adjusting unit for large flow rate control and a flow rate adjusting unit for small flow rate control are provided. According to the said structure, the opening degree adjustment of a small opening degree and a large opening degree can each be performed favorably.

  As effects of the present invention, the following effects can be obtained. That is, according to the liquid filling device, since the opening degree of the filling valve (adjustment of the flow rate adjustment unit) is adjusted by the driving fluid, the filling valve is introduced by introducing the driving fluid based on the control signal from the outside of the device. Can be automatically performed, and can also be used in a liquid filling operation in a dangerous atmosphere in which a flammable liquid is to be filled.

It is front sectional drawing of the liquid filling apparatus which concerns on embodiment of this invention. It is AA sectional drawing in FIG. 1 of the liquid filling apparatus which concerns on embodiment of this invention. It is BB sectional drawing in FIG. 1 of the liquid filling apparatus which concerns on embodiment of this invention. (A) is a schematic plan sectional view of the switching means when the switching cylinder is ON, (b) is a schematic side view of the switching means when the switching cylinder is ON, and (c) is a schematic CC sectional view in FIG. 4 (b). is there. (A) is a schematic plan sectional view of the switching means when the switching cylinder is OFF, (b) is a schematic side view of the switching means when the switching cylinder is OFF, and (c) is a DD cross-sectional schematic diagram in FIG. 5 (b). is there. It is front sectional drawing of the liquid filling apparatus at the time of large flow volume filling. It is front sectional drawing of the liquid filling apparatus at the time of small flow volume filling.

  First, the configuration of the liquid filling apparatus 1 according to the first embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the liquid filling apparatus 1 according to the first embodiment of the present invention supplies a liquid to be filled from an inflow path 21 and opens and closes the liquid filling path by a filling valve 22. Supplied from the outside of the liquid filling apparatus 1, the nozzle unit 2 for filling the flow rate of the liquid in an adjustable manner, the filling valve driving unit 3 for driving the filling valve 22, the flow rate adjusting unit 5 for adjusting the flow rate of the liquid. And a driving fluid introduction unit 90 that drives the flow rate adjusting unit 5 by introducing the driving fluid R.

  The nozzle part 2 is disposed at a position above a container (not shown) that is filled with a liquid during filling. A filling valve drive unit 3 is assembled above the nozzle unit 2. Further, the flow rate adjusting unit 5 and the driving fluid introducing unit 90 are assembled above the filling valve driving unit 3.

  Next, each component of the liquid filling apparatus 1 will be described.

  As shown in FIG. 1, the nozzle unit 2 includes a nozzle body 23, a filling port part 24 that is attached to the lower end of the nozzle body 23 and has a filling port 24 a, and a filling valve 22 that opens and closes the filling port 24 a. The filling valve 22 is attached to the tip portion, and includes a filling rod driving drive rod 25 and the like that adjust the opening degree of the filling valve 22 by moving out and out.

  The filling valve drive unit 3 is arranged at a box-shaped case portion 31 that forms an outer frame of the filling valve drive unit 3 and a flow rate adjusting unit 5 described later, and a substantially central portion of the filling valve drive unit 3 in a front view of FIG. A double acting double rod type large flow rate control cylinder 32 having a vertically extending and retracting rod 32a and a single acting single rod type having a retracting rod 33a which is disposed on the right side and protrudes upward. A small flow rate control cylinder 33, a column body 34 extending vertically in the left-side space, and a fulcrum pin 35 inserted in the front-rear direction (depth direction) in the middle portion of the column body 34 in the vertical direction extend in the left-right direction. A lever-type link 36 or the like that is swingably attached in a posture is provided.

  Below, each component of the filling valve drive part 3 is demonstrated.

  As shown in FIG. 1, in the large flow rate control cylinder 32, a retracting rod 32a that retreats and retracts when air (compressed air) as a driving fluid R is introduced into or released from the cylinder along the vertical direction. It is arranged to move freely. The exit / retraction rod 32a of the large flow rate control cylinder 32 is disposed in a posture that is coaxial with the drive rod 25 for driving the filling valve along the vertical direction. A first bracket 37 is attached to the upper end portion (the other end portion) of the retracting rod 32 a of the large flow rate control cylinder 32.

  The first bracket 37 has a hollow portion 37a through which a drive shaft 53 of a later-described large flow rate control flow rate adjusting unit 51 can be inserted, and a contact member 52 of the later described large flow rate control flow rate adjusting unit 51. Can be contacted from below and is connected to a first elevating pin 38 penetrating in the depth direction. The first elevating pin 38 is disposed at a substantially central portion in the left-right direction of the lever-shaped link 36 so as to be able to come into contact with a bottom portion of the concave portion 36a formed so as to be depressed downward. Further, the upper end portion of the first bracket 37 is urged downward by a spring 39 supported by the frame 31 a of the case portion 31.

  The small flow rate control cylinder 33 is arranged so as to be movable up and down with a posture in which a retracting rod 33a protruding and retracting when air (compressed air) as a driving fluid R is introduced or released into the cylinder protrudes upward. Has been. A second bracket 40 is attached to the upper end portion of the retracting rod 33 a of the small flow rate control cylinder 33.

  The second bracket 40 can be contacted from below with a contact member 62 of a flow rate adjusting unit 61 for small flow control described later, and is connected to a second lifting pin 41 penetrating in the depth direction. The second raising / lowering pin 41 is connected to the right side portion of the lever-type link 36. The lever-type link 36 swings about the fulcrum pin 35 as the retracting rod 33a of the small flow rate control cylinder 33 is retracted.

  Next, the flow rate adjusting unit 5 which is one of the components of the liquid filling apparatus 1 and is a main part of the present invention will be described.

  As shown in FIG. 1, the flow rate adjusting unit 5 is disposed at the above-described case portion 31 and substantially at the center of the flow rate adjusting unit 5 in a front view of FIG. A flow rate adjustment unit 51 for large flow control that adjusts the flow rate, a flow rate adjustment unit 61 for small flow rate control that adjusts the flow rate of the liquid when filling the liquid with a small flow rate, and the like are provided.

  Hereinafter, the flow rate adjusting unit 51 for large flow rate control and the flow rate adjusting unit 61 for small flow rate control, which are components of the flow rate adjusting unit 5, will be described.

  As shown in FIG. 1, the large flow rate control flow rate adjusting unit 51 includes a contact member 52 that can contact the retractable rod 32 a (the upper surface of the first bracket 37) of the large flow rate control cylinder 32, and a contact member. And a drive shaft 53 that moves the contact member 52 by being rotated in the forward and reverse directions, and a drive shaft rotating mechanism 70 that rotates the drive shaft 53 in the forward and reverse directions.

  The contact member 52 is formed in a block shape, and a screw hole into which the drive shaft 53 can be screwed is formed at the center thereof. The abutting member 52 is not limited to a block shape, and the lower end surface thereof can abut on the retracting rod 32a of the large flow rate control cylinder 32, and the drive shaft 53 can be screwed. I just need it. The contact member 52 is inserted into the left end portion thereof with a restriction shaft 54 that guides the contact member 52 and the first bracket 37 in the vertical direction and restricts movement in the rotational direction.

  The drive shaft 53 is rotatably inserted into the frame 31 a and the spring 39 of the case portion 31, a screw is formed at a lower portion thereof and is screwed into a screw hole of the contact member 52, and an upper portion thereof is a drive shaft rotating mechanism 70. Is rotatably supported.

  Further, as shown in FIG. 1, the small flow rate control flow rate adjusting unit 61 includes a contact member 62 capable of contacting the retracting rod 33a (the upper surface of the second bracket 40) of the small flow rate control cylinder 33, and a contact member 62. A drive shaft 63 that is screwed into the contact member 62 and rotates in the forward / reverse direction to move the contact member 62 and a drive shaft rotation mechanism 70 that rotates the drive shaft 63 in the forward / reverse direction are provided.

  The contact member 62 is formed with a screw hole into which the drive shaft 63 can be screwed. In addition, a restriction shaft 64 that guides the contact member 62 in the vertical direction and restricts the movement in the rotational direction is inserted into the contact member 62 at the right end thereof.

  The drive shaft 63 is inserted into the frame 31 a of the case portion 31, a screw is formed in the lower portion thereof, and is screwed into the screw hole of the contact member 62, and the upper portion thereof is rotatably supported by the drive shaft rotating mechanism 70. .

  Next, the drive shaft rotating mechanism 70 which is one of the components of the large flow rate control flow rate adjusting unit 51 and the small flow rate control flow rate adjusting unit 61 will be described.

  As shown in FIG. 1 and the like, the drive shaft rotating mechanism 70 is provided independently for each of the large flow rate control flow rate adjusting unit 51 and the small flow rate control flow rate adjusting unit 61.

  As shown in FIGS. 2, 3, and 4, the drive shaft rotating mechanism 70 includes a rotating shaft 71 that rotates in the forward and reverse directions and a forward and reverse direction that rotates the rotating shaft 71 alternately in the forward and reverse directions by the driving fluid R. Forward rotation transmission incorporating a reverse rotation means 72 and forward rotation transmission means 73a for transmitting only the rotation force in the forward direction to the drive shaft 53 (drive shaft 63) from the alternating rotation force in the forward and reverse directions of the rotation shaft 71. A reverse rotation transmission gear 74 having a built-in reverse rotation transmission means 74a for transmitting only the reverse rotation force to the drive shaft 53 (drive shaft 63) from the forward rotation of the rotation shaft 71 in the forward and reverse directions. Switching means 75 that is switched by the driving fluid R and selectively transmits the rotation of the rotating shaft 71 to the forward rotation transmission gear 73 or the reverse rotation transmission gear 74.

  Below, each component of the drive shaft rotation mechanism 70 is demonstrated.

  As shown in FIG. 4, the rotary shaft 71 has a first drive gear 76 and a second drive gear 77 for transmitting the rotational force to the drive shaft 53. The first drive gear 76 meshes with a first switching gear 78 described later. The second drive gear 77 meshes with a second switching gear 79 described later.

  The forward / reverse rotation means 72 is means for rotating the rotation shaft 71 alternately and intermittently in a forward / reverse direction at a predetermined angle (for example, 90 °), and includes, for example, a rotary cylinder. The forward / reverse rotation means 72 is driven by introducing a driving fluid R (for example, compressed air) from a driving fluid introduction section 90 described later to the input section 72a or the input section 72b.

  The forward direction rotation transmission gear 73 is provided on the drive shaft 53 (drive shaft 63) and incorporates a forward direction rotation transmission means 73a therein. The forward direction rotation transmitting means 73a is a means for selecting only the forward direction rotational force from the forward and reverse direction rotational force transmitted from the rotational shaft 71 and transmitting it to the drive shaft 53 (drive shaft 63). An example of the forward direction rotation transmission means 73a is a one-way clutch.

  The reverse direction rotation transmission gear 74 is provided on the drive shaft 53 (drive shaft 63) and incorporates the reverse direction rotation transmission means 74a therein. The reverse direction rotation transmitting means 74a is a means for selecting only the reverse direction rotational force from the forward and reverse direction rotational force transmitted from the rotary shaft 71 and transmitting it to the drive shaft 53 (drive shaft 63). An example of the reverse direction rotation transmission means 74a is a one-way clutch.

  The switching means 75 includes a first switching gear 78 that transmits the rotational force of the rotation shaft 71 to the forward rotation transmission gear 73, a second switching gear that transmits the rotation force of the rotation shaft 71 to the reverse rotation transmission gear 74, and And a switching cylinder 80 for selecting a switching gear (the first switching gear 78 or the second switching gear 79) for transmitting the rotational force of the rotating shaft 71.

  The first switching gear 78 is provided on the shaft 78 a and meshes with the forward direction rotation transmission gear 73. The second switching gear 79 is provided on the shaft 79 a and meshes with the reverse direction rotation transmission gear 74. Further, the shaft 78a and the shaft 79a are rotatably provided on a switching frame 81 connected to the tip of the retracting rod 80a of the switching cylinder 80. The switching frame 81 moves when the switching cylinder 80 is driven, that is, when the retracting rod 80a of the switching cylinder 80 is retracted. The retracting rod 80a of the switching cylinder 80 protrudes or retracts when the driving fluid R is introduced from the driving fluid introduction section 90 to the input section 80b or the input section 80c.

  Next, the driving fluid introduction unit 90 will be described.

  As shown in FIGS. 1, 2, and 3, the driving fluid introduction section 90 is provided on the side of the case section 31 on the upper left side in FIG. 1 and includes a plurality of ports 90 a. The driving fluid introduction section 90 is connected to the driving shaft rotating mechanism 70 (forward / reverse rotating means 72 and switching cylinder 80), and the driving fluid R supplied from the outside of the liquid filling apparatus 1 is supplied to the driving shaft rotating mechanism 70. To introduce. Furthermore, the driving fluid introduction unit 90 is configured such that the driving fluid R is introduced or stopped based on a control signal from a control unit (not shown) provided outside the liquid filling apparatus 1. Yes. The drive fluid R is introduced or stopped based on a control signal from the controller, so that the drive shaft rotating mechanism 70 is driven or stopped, and the opening degree of the filling valve 22 is adjusted. ing. The driving operation of the driving shaft rotating mechanism 70 by the driving fluid R will be described later.

  First, the opening degree adjustment of the filling valve 22 when filling the liquid with a large flow rate will be described.

  As shown in FIG. 6, when adjusting the opening degree of the filling valve 22 at the time of filling a large flow rate, the drive shaft rotating mechanism 70 of the flow rate adjusting unit 51 for large flow rate control is driven to drive The shaft 53 is rotated in the forward direction (for example, clockwise direction), and the contact member 52 is moved upward in the figure (the contact member 52 is the retracting rod 32a of the large flow rate control cylinder 32 (the upper surface of the first bracket 37). Move in a direction away from). Thereby, the contact position between the contact member 52 and the retracting rod 32a (the upper surface of the first bracket 37) is changed in the upward direction in the drawing, and the retracting rod 32a can protrude in the upward direction in the drawing. When air (compressed air) is introduced into the large flow rate control cylinder 32 and the retractable rod 32a is protruded upward in the figure, the drive rod 25 is greatly driven in the upward direction in the figure. Thereby, the filling valve 22 is greatly opened at a predetermined opening degree.

  On the other hand, when adjusting so that the filling valve 22 is opened small at the time of filling a large flow rate, the drive shaft 53 is driven in the reverse direction (for example, by driving the drive shaft rotating mechanism 70 of the flow rate adjusting unit 51 for large flow control). The contact member 52 is rotated in the counterclockwise direction to move downward in the figure (a direction approaching the upper surface of the first bracket 37). Thereby, the contact position between the contact member 52 and the retracting rod 32a (the upper surface of the first bracket 37) is changed in the illustrated downward direction, and the protrusion of the retracting rod 32a in the illustrated upward direction is restricted (FIG. 1). When air (compressed air) in the large flow rate control cylinder 32 is introduced and the retractable rod 32a protrudes upward in the figure, the drive rod 25 is driven small in the upward direction in the figure. Thereby, the filling valve 22 is opened small at a predetermined opening degree.

  In the above description, the opening of the filling valve 22 is adjusted to increase by rotating the drive shaft 53 in the forward direction (for example, clockwise direction), and in the reverse direction (for example, counterclockwise direction). Although the adjustment is made so that the opening degree of the filling valve 22 is reduced by rotating, the relationship between the rotation direction of the drive shaft 53 and the opening degree of the filling valve 22 is not limited to the above, The opening degree of the filling valve 22 is adjusted so that the opening degree of the filling valve 22 is reduced by rotation of the shaft 53 in the forward direction (for example, clockwise direction), and the opening degree of the filling valve 22 is rotated by rotation in the reverse direction (for example, counterclockwise direction). May be adjusted so as to increase.

  Next, the opening degree adjustment of the filling valve 22 when the liquid filling is switched from a large flow rate to a small flow rate will be described.

  As shown in FIG. 7, when the filling of the liquid is switched from a large flow rate to a small flow rate, the air (compressed air) in the large flow rate control cylinder 32 is released and the retracting rod of the large flow rate control cylinder 32 is opened. 32a is retracted downward in the figure. On the other hand, the opening degree of the filling valve 22 at the time of filling the small flow rate is adjusted in advance by driving the drive shaft rotating mechanism 70 of the flow rate adjusting unit 61 for small flow rate control. Specifically, the drive shaft 63 is rotated in the forward direction (for example, clockwise direction), and the contact member 62 is moved upward in the figure (the contact member 62 is a retractable rod 33a (second bracket) of the small flow rate control cylinder 33. 40) in a direction away from the upper surface 40). By moving the contact member 62 upward in the figure, the retracting rod 33a of the small flow rate control cylinder 33 can protrude in the upward direction in the figure. Further, by rotating the drive shaft 63 in the reverse direction (for example, counterclockwise direction), the contact member 62 can be moved downward in the figure, and the filling valve 22 can be adjusted to a small opening. is there. In this state, when air (compressed air) is introduced into the small flow rate control cylinder 33, the retracting rod 33a is protruded upward in the figure. Thereby, the right side portion of the lever-type link 36 is inclined slightly upward, and the first elevating pin 38 of the retractable rod 32a of the large flow rate control cylinder 32 is connected to the concave portion 36a of the lever-type link 36. Stop in the state of entering and abutting. As a result, the filling valve 22 is slightly opened via the drive rod 25, and the liquid is filled at a small flow rate.

  As described above, the adjustment of the opening degree of the filling valve 22 at the time of filling a large flow rate and at the time of filling a small flow amount drives the drive shaft rotating mechanism 70 of the flow adjustment unit 51 for large flow control or the flow rate adjustment unit 61 for small flow control. The drive shaft 53 or the drive shaft 63 is rotated in the forward and reverse directions.

  Hereinafter, the driving operation of the driving shaft 53 by the driving fluid R will be described. Note that the drive operation of the drive shaft 63 is the same as the drive operation of the drive shaft 53, and thus the description thereof is omitted.

  As shown in FIG. 4, when the drive shaft 53 is rotated in the forward direction, first, the drive fluid introduction section 90 is driven to the input section 72a and the input section 72b in the forward / reverse rotation means 72 of the drive shaft rotation mechanism 70. The working fluid R is alternately input, and the forward / reverse rotation means 72 of the drive shaft rotation mechanism 70 is driven. Thereby, the rotating shaft 71 rotates alternately and intermittently at a predetermined angle in the forward and reverse directions. On the other hand, the driving fluid R is selectively introduced from the driving fluid introduction unit 90 to the input unit 80b and the input unit 80c in the switching cylinder 80 of the switching unit 75 to drive the switching unit 75. By introducing the driving fluid R into one input part 80b of the switching cylinder 80, the retracting rod 80a of the switching cylinder 80 protrudes in the direction a, and the first switching gear 78 rotates in the forward direction with the first driving gear 76. The transmission gear 73 is engaged. In this way, the first switching gear 78 meshes with the first drive gear 76 and the forward rotation transmission gear 73, so that the rotational force in the forward and reverse directions of the rotating shaft 71 causes the first drive gear 76 and the first switching gear 78 to move. To the forward rotation transmission gear 73. At this time, the forward direction rotation transmission means 73 a formed of a one-way clutch selects only the forward direction rotational force from the transmitted forward and reverse direction rotational force, and transmits the forward direction rotational force to the drive shaft 53. As a result, the drive shaft 53 rotates in the forward direction. The forward direction rotational transmission means 73a is also transmitted with a rotational force in the reverse direction by intermittent forward / reverse rotation of the forward / reverse rotational means 72. In this case, the forward direction rotational transmission means 73a is connected to the drive shaft 53. Therefore, the rotational force in the reverse direction is not transmitted to the drive shaft 53 (the drive shaft 53 does not rotate in the reverse direction).

  On the other hand, as shown in FIG. 5, when the drive shaft 53 is rotated in the reverse direction, first, the input portion 72 a and the input portion 72 b in the forward / reverse rotation means 72 of the drive shaft rotation mechanism 70 from the drive fluid introduction portion 90. The driving fluid R is alternately input to the forward and reverse rotating means 72 of the driving shaft rotating mechanism 70 to drive the driving fluid R. On the other hand, the driving fluid R is introduced from the driving fluid introduction section 90 to the other input section 80c of the switching cylinder 80, and the retracting rod 80a of the switching cylinder 80 is retracted in the direction b. As a result, the second switching gear 79 is engaged with the second drive gear 77 and the reverse direction rotation transmission gear 74, and the rotational force in the forward / reverse direction of the rotating shaft 71 is transmitted via the second drive gear 77 and the second switch gear 79. To the reverse direction rotation transmission gear 74. At this time, the reverse direction rotation transmission means 74 a formed of a one-way clutch selects only the reverse direction rotational force from the transmitted normal and reverse direction rotational force, and transmits the reverse direction rotational force to the drive shaft 53. Thereby, the drive shaft 53 rotates in the reverse direction. In addition, although the forward direction rotational force is also transmitted to the reverse direction rotation transmission means 74a by the intermittent forward / reverse rotation of the forward / reverse rotation means 72, in this case, the reverse direction rotation transmission means 74a is connected to the drive shaft 53. Therefore, the rotational force in the positive direction is not transmitted to the drive shaft 53 (the drive shaft 53 does not rotate in the positive direction).

  The relationship between the driving of the switching cylinder 80, the meshing of the switching gears 78 and 79, the driving gears 76 and 77, and the rotation transmission gears 73 and 74, and the rotational direction of the driving shaft 53 is limited to the above. is not.

  As described above, the liquid filling apparatus 1 includes the filling valve 22 that opens and closes the filling port 24a at the tip of the nozzle portion 2, and the filling valve 22 is attached to the tip portion, and the opening degree of the filling valve 22 is adjusted by withdrawing and withdrawing. A large flow rate control cylinder 32 having a drive rod 25 for driving the filling valve, a retractable rod 32a to which the drive rod 25 is removably connected, and a retractable rod 32a of the large flow rate control cylinder 32 A flow rate adjustment unit 5 (a flow rate adjustment unit 51 for large flow rate control) that is provided so as to be able to contact and adjusts the extension / retraction stroke of the extension / retraction rod 32a by changing the contact position with the extension / retraction rod 32a. The flow rate adjusting unit 5 includes a contact member 52 that can contact the retracting rod 32a, and a drive shaft that is screwed into the contact member 52 and moves in the forward and reverse directions to move the contact member 52. 53 and drive fluid R Rotating shafts 71 that are alternately rotated in the forward and reverse directions by the forward / reverse rotating means 72 and forward and reverse directions in which only the rotational force in the forward direction is transmitted to the drive shaft 53 from the alternating rotational forces in the forward and reverse directions. The rotation transmission means 73a, the reverse direction rotation transmission means 74a for transmitting only the rotation force in the reverse direction to the drive shaft 53 from the alternating rotation force in the forward and reverse directions of the rotation shaft 71, and the drive fluid R are switched. And switching means 75 for selectively transmitting the rotation of 71 to the forward direction rotation transmission means 73a or the reverse direction rotation transmission means 74a.

  By configuring the liquid filling apparatus 1 in this way, the opening degree adjustment of the filling valve 22 (adjustment of the flow rate adjustment unit 5) can be performed only by introducing the driving fluid R. Therefore, even in filling work in a hazardous atmosphere, The liquid filling apparatus 1 can be used satisfactorily. Moreover, the opening degree adjustment (adjustment of the flow volume adjustment part 5) of the filling valve 22 can be automatically performed by connecting with the control part outside the liquid filling apparatus 1. Specifically, when liquids having different supply conditions and liquid properties are replaced, the opening degree of the filling valve 22 corresponding to each condition is preset, and the driving fluid R based on the control of the control unit is preset. The opening degree of the filling valve 22 can be automatically changed by the input signal. Further, in the multiple liquid filling apparatus 1 in which the filling speed is likely to vary between the nozzles, the opening adjustment of the filling valve 22 that needs to be frequently performed can be automated, so that the liquid filling operation can be performed efficiently. It can be carried out. Furthermore, since the opening degree of the filling valve 22 can be adjusted by a sequencer or other control signal by connecting to an external control unit of the liquid filling apparatus 1, when a liquid filling condition or a change in liquid pressure occurs, It can be made to follow with the signal from a control part.

  Further, in the liquid filling apparatus 1, the forward direction rotation transmission means 73a and the reverse direction rotation transmission means 74a are each constituted by a one-way clutch gear.

  By configuring the liquid filling apparatus 1 in this way, the rotational force in only one direction among the rotational forces in the forward and reverse directions transmitted from the rotational shaft 71 can be reliably selected and applied to the drive shaft 53 (drive shaft 63). Can communicate.

  Furthermore, the liquid filling apparatus 1 is provided with a large flow rate control cylinder 32 and a small flow rate control cylinder 33 as flow rate control cylinders, and a retracting rod 32 a of the large flow rate control cylinder 32 and a small flow rate control cylinder 33. The flow rate adjusting unit 51 for large flow rate control is configured so as to be able to be interlocked with the rod 33a of the large flow rate control and corresponding to the rod 33a of the large flow rate control cylinder 32 and the rod 33a of the small flow rate control cylinder 33. And a flow rate adjusting unit 61 for small flow rate control.

By configuring the liquid filling apparatus 1 in this manner, the opening degree of the filling valve 22 (adjustment of the flow rate adjusting unit 5) can be adjusted only by introducing the driving fluid R even when filling with a large flow rate and when filling with a small flow rate. . Therefore, by connecting to a control unit outside the apparatus, it is possible to automatically adjust the opening degree of the filling valve 22 (adjustment of the flow rate adjusting unit 5) even when filling a large flow rate and filling a small flow rate.
In the above-described embodiment, the case where compressed air (air) is used as the driving fluid R has been described. However, as the driving fluid R, another fluid such as an inert gas or a liquid may be used.

1 Liquid filling device 2 Nozzle (filling nozzle)
5 Flow rate adjusting unit 22 Filling valve 24a Filling port 25 Drive rod 32 Large flow rate control cylinder 32a Retracting rod 33 Small flow rate control cylinder 33a Retracting rod 51 Large flow rate control flow rate adjusting unit 52 Abutting member 53 Drive shaft 61 Small Flow rate control flow rate adjusting unit 71 Rotating shaft 72 Forward / reverse rotation means 73a Forward rotation transmission means 74a Reverse rotation transmission means 75 Switching means R Driving fluid

Claims (3)

A filling valve for opening and closing the filling port at the tip of the filling nozzle;
The filling valve is attached to the tip portion, and a driving rod for driving the filling valve whose opening degree is adjusted by withdrawing and withdrawing,
A flow rate control cylinder having a retractable rod to which the drive rod is removably connected;
A flow rate adjusting portion that is provided so as to be able to come into contact with a retractable rod of the flow rate control cylinder, and adjusts a retracted stroke of the retractable rod by changing a contact position with the retractable rod;
With
The flow rate adjustment unit is
An abutting member capable of abutting on the retracting rod;
A drive shaft that is screwed into the contact member and rotates in the forward and reverse directions to move the contact member;
A rotating shaft that is alternately rotated in forward and reverse directions by forward and reverse rotating means driven by a driving fluid;
Forward direction rotation transmitting means for transmitting only the rotational force in the forward direction to the drive shaft from the alternating rotational force in the forward and reverse directions of the rotational shaft;
Reverse direction rotation transmission means for transmitting only the rotational force in the reverse direction to the drive shaft from the alternating rotational force in the forward and reverse directions of the rotational shaft;
Switching means that is switched by the driving fluid and selectively transmits the rotation of the rotation shaft to the forward direction rotation transmission means or the reverse direction rotation transmission means;
A liquid filling apparatus comprising:   2. The liquid filling apparatus according to claim 1, wherein each of the forward direction rotation transmission unit and the reverse direction rotation transmission unit includes a one-way clutch gear. As the flow rate control cylinder, a large flow rate control cylinder and a small flow rate control cylinder are provided,
The retractable rod of the large flow rate control cylinder and the retractable rod of the small flow rate control cylinder are configured to be interlocked,
Corresponding to the retracting rod of the large flow rate control cylinder and the retracting rod of the small flow rate control cylinder, a flow rate adjusting unit for large flow rate control and a flow rate adjusting unit for small flow rate control are provided. The liquid filling apparatus according to claim 1, wherein the liquid filling apparatus is characterized in that:

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