JP3679828B2 - Rotary joint - Google Patents

Description

[0001]
[Industrial application fields]
  The present invention relates to a bottle filling and plugging machine, a canning machine or a filling machine.In order to supply air to the rotating part from outsideRegarding the rotary joint usedIs a thing.
[0002]
[Prior art]
  Conventional rotary joint is usedRotaryThe outline of the liquid filling machine will be described as follows. 4 and 5, the container A is supplied onto the rotating disk 12 of the filling machine by the supply conveyor 1, the timing screw 2 and the star wheel 3.The rotating disk 12 isBearing 9 as shown in FIG.ThroughIt is pivotally supported and rotated by a drive mechanism (not shown).It is like that.On rotating disk 12Led toContainer A is moved up and down by air cylinder 6,Rotating disk12Rotate in sync withShiIt is arrange | positioned at the lower part of the filling valve 7 by the side of the filler bowl 4 which is. AndBy opening the filling valve 7,The liquid supplied from the supply pipe 8 to the filler bowl 4 is filled in the container A.
[0003]
  thisA rotary joint 13 to which a plurality of various pipes are attached is disposed at the upper center portion of the rotating filler bowl 4.For rotary joint 13Clean air and working air are suppliedIt has become so.Rotary joint 13IsCommunicate between the corresponding fixed and rotating pipesCommunicationClean air or working air is filled with filler bowl 4And rotating disk 12 etc.Are supplied to the filling valve 7 and the lifting / lowering air cylinder 6.
[0004]
  Below, like thisRotaryA conventional example of a rotary joint used in a filling machine will be described. As shown in FIG. 6, the rotary joint includes a rotating shaft 40 that is connected to a rotating body and rotates, and a plurality of rotation-side connection ports 41, 41 of the rotating shaft 40 and axial fluid passages 43, 43. Connected throughAndA plurality of rotation side openings 42 and 42 arranged at intervals in the axial direction of the rotation shaft 40 and the rotation side openings 42 and 42 are individually covered.Yes,Same opening42, 42Communicate withDoAn annular passage 45a andOpen to the annular passage 45aA housing block 45 having a plurality of seal members 45c and 45d having a fixed-side connection port 45b, and an engaging member that is fitted into a notch provided on the adjacent end face of the housing block 45 and engages with the notch In order to press the sealing members 45c and 45d, the lower support mechanism 50 that supports the plurality of steps of the housing block 45 on the lower side, and the sealing members 45c and 45d.,A plurality of steps of the housing block 45 are sandwiched between the lower support mechanism 50,Bolt at the upper end of the rotating shaft 4051b, 51dIt is comprised by the upper side support mechanism 51 fastened by.
[0005]
  in this way,The conventional rotary joint includes a plurality of rotation side connection ports 41 and 41 and rotation side openings 42 and 42.,And the rotating shaft 40 having a plurality of fluid passages 43, 43 connected to both of them, the openings 42, 42 are individually covered and communicated with the openings 42, 42.DoA housing block 45 with a plurality of seal members 45c, 45d having an annular passage 45a and a fixed side connection port 45b is detachably fitted, and is tightened by a fastening tool.ThatThe housing block 45 is stacked and fixed in a plurality of stages.With something likeThe housing block 45 which is divided and reduced in weightUsingThis facilitates the replacement of the seal members 45c and 45d, improves the replacement workability, eliminates the need for tightening adjustment of the seal members 45c and 45d, eliminates variations in assembly, extends the service life, and improves the rotational seal performance. Is aimed at. The above is a conventional example introduced in Japanese Utility Model Publication No. 3-38552.
[0006]
[Problems to be solved by the invention]
  by the way,As a filling valve of a recent rotary filling machine, an operation process program is incorporated into an electric circuit in an electric control panel built in the filling machine.IncludedAccording to this, the air switching valve is operated, and the one that fills by air operation appears.Yes.This kindWith filling valveRotary filling machine from outside,Supplies not only working air, but also electrical and, in some cases, optical signalsAs well asBy the angle detection device provided insideThe rotation angle position of the filling machineDetectTheCombine these signals in the built-in control panel,The filling valve is operated in order at regular intervals.
[0007]
  like thisIn the case of a simple rotary filling machineTo rotary joint,ElectricitySupplySlip rings, angle detectors, and in some cases, optical signal rotary connectors,RespectivelyAdditional provisionIt will be necessary. In such casesElectricity, abrasion powderSupplyFor slip ring and,Need a clean atmosphereFor optical signalWhat is a rotary connector?,It is desirable to provide them as far apart as possible. In addition, for the angle detector, the effect of noise generated by the slip ringButAvoid as much as possibleIsTo be able toDesired. However, in the conventional rotary joint, no consideration has been given to disposing the slip ring for supplying electricity away from the angle detection device and the optical signal rotary connector.
[0008]
  Also electricSupplyFor slip ring,Sometimes it is necessary to check its wear condition,Covers that slip ringCoversIsEasy to install and removeTo be able toAlthough it is required, when using a rotary joint for fluid as in the past, there is no consideration for easy attachment / detachment of the cover,Meeting such demandsIt was difficult.
[0009]
  MoreIn addition, since the rotary filling machine is used in a place with a lot of moisture, and watering may be performed for cleaning,For rotary filling machineElectricitySupplySlip ringCover the slip ringcoverSet upTo prevent water and moistureThatCover installation structure is sealedBe requiredThere are many casesIga,In conventional rotary joints,In that case, Because the cover will be provided between the fixed part and the rotating part,A sliding seal is required for the cover, and the structureButIt becomes complicated. Also,As an angle detection device used in such a rotary filling machine, a rotary encoder is common,In the conventional rotary joint structure, the encoder is usually provided at the upper end of the rotary joint.Because,ThatIt has been difficult to arrange the encoder output section on the rotating body side, particularly in the vicinity of the filling valve control panel.
[0010]
  Accordingly, an object of the present invention is to prevent wear powder and noise generated by the slip ring for supplying electricity from adversely affecting the angle detection device and the optical signal rotary connector, and to cover for inspection and maintenance.Removing and attaching itIt is easy to provide a rotary joint that has a simple structure.
[0011]
  To achieve the above object, the rotary joint of the present invention comprises a plurality of filling valves.ButArranged on the circumferenceHave beenReceiving the container under the filling valve while rotating,ThatAfter the container is filled with liquid sequentially during rotation, the container is discharged to the outside.I didFor rotary filling machineProvided,In the rotary part of the rotary filling machineAir and electricity from outsideSupplyThe rotary joint is disposed at the center of the rotary filling machine.,ElectricitySupplyforofA fixed shaft provided with a fixed side of the slip ring and the angle detection device, and fixed to the rotating portion so as to rotate integrally with the rotating portion of the rotary filling machine and fixed to the outer peripheral side of the fixed shaft Arranged concentrically with the shaft,Above airFor supplyThe rotation side of the joint andAir supplied from the joint passesAir passageAndThe rotating body provided with the rotation side of the angle detection device, and disposed on the outer peripheral side of the rotating body via a bearing,While supporting the fixed shaft integrally,Air aboveOn the fixed side of the supply joint, the piping for supplying air to the joint, and the slip ringA fixed support that supports a wiring section for supplying electricity, and fixed to the rotating body.,Above electricitySupplyA brush holder that holds the brush that draws electricity from the slip ring, and attached to the rotating bodyThe filling valve is operated based on a rotation angle signal of the rotating body sent from the angle detection device.Filling valve control panel and,It is characterized by having.
[0012]
  Further, the rotary joint of the present invention has the above air.For supplyAbove the jointSupplySlip ring, and the angle detector belowRespectivelyIt is characterized by being arranged.
[0013]
  Furthermore, the rotary joint according to the present invention includes the angle detection device.But,Provided near the filling valve control panel that rotates integrally with the rotary part of the rotary filling machine.Has beenIt is characterized by that.
[0014]
  The rotary joint of the present invention includes a plurality of filling valves.ButArranged on the circumferenceHave been, Receiving the container under the filling valve while rotating,ThatAfter the container is filled with liquid sequentially during rotation, the container is discharged to the outside.I didFor rotary filling machineProvided,In the rotary part of the rotary filling machineAir, electricity and signals from outsideSupplyThe rotary joint is disposed at the center of the rotary filling machine.,ElectricitySupplyforofSlip ring, fixed side of angle detector,And a hollow fixed shaft provided with a fixed side of the optical signal rotary connector, and fixed to the rotary portion so as to rotate integrally with the rotary portion of the rotary filling machine and on the outer peripheral side of the hollow fixed shaft. It is arranged concentrically with the hollow fixed shaft,Above airFor supplyThe rotation side of the joint andAir supplied from the joint passesAir passageAndThe rotation side of the angle detection device and the rotation side of the optical signal rotary connector areRespectivelyThe rotating body is provided, and is arranged on the outer peripheral side of the rotating body via a bearing.,While integrally supporting the hollow fixed shaft,Air abovePiping side for supplying air to the fixed side of the supply joint and the jointThe electricityTo the slip ringDistribution for supplylinePartAnd an optical signal cable connected to the fixed side of the optical signal rotary connector.A fixed supporting body that is supported and fixed to the rotating body,Above electricitySupplyA brush holder that holds the brush that draws electricity from the slip ring, and attached to the rotating bodyThe filling valve is operated based on a rotation angle signal of the rotating body sent from the angle detection device and an external signal transmitted via the optical signal cable and the optical signal rotary connector.Filling valve control panel and,WithThe fixed side of the optical signal rotary connector is disposed in the hollow portion of the hollow fixed shaft.It is characterized by having.
[0015]
  Furthermore, the rotary joint of the present invention is the above air.For supplyAbove the jointSupplySlip ring is provided, and the optical signal rotary connector below andUpThe angle detector is provided.
[0016]
  In the rotary joint of the present invention, the optical signal rotary connector and the angle detection device are provided in the vicinity of the filling valve control panel that rotates integrally with the rotary portion of the rotary filling machine. It is a feature.
[0017]
  Furthermore, the rotary joint of the present invention is characterized in that the filling valve control panel and the electricity supply slip ring are respectively disposed in an air chamber in which the inside is maintained at a positive pressure.
[0018]
  Further, the rotary joint of the present invention is a positive pressure air in the chamber of the filling valve control panel.But, The above rotating bodyIs provided inElectricity through the through holeSupplyTo the slip ring roomIs,sameElectricitySupplyFor slip ringForming a chamberEject from the gap in the coverIsIt is characterized by being made to be.
[Action]
[0019]
  In the rotary joint of the present invention, a plurality of filling valves are arranged along the circumference on the rotating part,ThatAs the rotating part rotates, the rotary part of the rotary filling machine sequentially receives the containers to be filled under the filling valve, fills the containers with the filled substances, and sequentially discharges the filled containers to the outside. On the side, air as the pressure medium for operating the filling valve, electricity sent to the filling valve control panel, and optical signal when signal transmission is performed by optical communication.,Fixed support for each rotary filling machineAlsoIs used for delivery from a fixed part side such as a fixed shaft.
[0020]
  It is fixed to the rotary part of the rotary filling machine and the air provided on the rotary body that rotates integrally with the rotary part.For supplyThe rotation side of the joint receives air supply from the fixed side of the air supply joint provided on the fixed support.TheThe supplied air is,It is sent to the rotary part of the rotary filling machine through a passage provided in the rotating body and used for the operation of each filling valve (Claim 1 or Claim 4).
[0021]
  OutsideThe electricity supplied from the power supply is transmitted from the fixed support to the slip ring provided on the fixed shaft or hollow fixed shaft.The The electricity isIn the same slip ring,It is transmitted to the brush held by the brush holder fixed to the rotating body, and further transmitted from the brush to the filling valve control panel via the wiring on the rotating body side (Claim 1 or Claim 4).
[0022]
  Optical communication is used to transmit external signals.WhatWhen performing, the optical signal sent from the outsidesignalBy cable,From the fixed support to the fixed side of the optical signal rotary connector through the through-hole forming the hollow portion of the hollow fixed shaft, where the optical signal is the rotation side of the optical signal rotary connector provided on the rotating body Communicated toLed to filling valve control panelIt is converted into an electric signal (claim 4).
[0023]
  An angle detection device having a rotation side of an angle detection device provided on a rotating body and a fixed side of an angle detection device provided on a fixed shaft or a hollow fixed shaft detects a rotation angle of the rotation body and detects the rotation angle. Send signal to filling valve control panel. In the filling valve control panel, the output signal is sent to the filling valve through voltage conversion, AC → DC conversion, signal processing by program, etc.TheThe filling valve follows the signal from the filling valve control panelswitchingActuatedThisThe At this time, the angle detection device instructs the operation timing of each filling valve to the electric circuit of the filling valve control panel based on the detected rotation angle (Claim 1 or Claim 4).
[0024]
  Air supply unitIs an air supply jointAn electric power supply slip ring is disposed above and an angle detection device and, in some cases, an optical signal rotary connector are disposed below.,Electricity that generates wear powderSupplyThe slip ring for use is disposed at a position away from the angle detection device and the optical signal rotary connector.The Therefore, Angle detectors and optical signal rotary connectorsBut,ElectricitySupplyIt is not affected by the wear powder generated by the slip ringBecomeWithEven when a rotary encoder is used as the angle detector,EncoderBut,ElectricitySupplyTo be affected by noise generated by the slip ringAlso disappear(Claim 2 or Claim 5).
[0025]
  In addition, an angle detector is provided near the filling valve control panel.BeByMeanwhileShort wiringBecauseIntrusion of noise generated by the slip ring for supplying electricity is reduced (claims 3 and 6).
[0026]
  In addition, filling valve control panel and electricalSupplyEach slip ring is placed in an air chamber where the inside is kept at positive pressure.BeThis prevents water and moisture from entering the air chamber of the filling valve control panel and the air chamber of the electricity supply slip ring (Claim 7).
[0027]
  Also, the positive pressure air inside the filling valve control panelIs provided inOf slip ring for electricity supply through through holeLead into the room and form the roomEject from the gap in the coverLetBy making,Wear powder generated in the slip ring for supplying electricity is prevented from entering the air chamber of the filling valve control panel.
[0028]
【Example】
  Hereinafter, a rotary joint as an embodiment of the present invention will be described with reference to the drawings. 1 is an overall side cross-sectional view of a rotary filling machine provided with a rotary joint, FIG. 2 is an enlarged side cross-sectional view showing a rotary joint of part B in FIG. 1, and FIG. 3 is a rotating part of the rotary joint in FIG. FIG.
[0029]
  The process in which the container A is supplied to the filling machine by the supply conveyor, the timing screw and the star wheel is the same as that described with reference to FIG. Also here,Transmission of external signals such as filling program changes is performed using optical signals.UmonotosuNeedless to say, there is no problem with electrical communication. In that case, the optical signal rotary connector is not required. Furthermore, as an angle detector, a resolver or the like can be considered, but here it is efficient and generally used.RotaryAn encoder will be used.
[0030]
  The rotary joint of the embodiment is arrangedRotaryThe structure of the filling machine is as follows.
  As shown in FIG. 1, the bearing 29 of the filling machineRotating supportThe container A supplied onto the rotary disk 32 that is driven to rotate by the drive mechanism 34 is moved by the lift air cylinder 26.,It is disposed under the filling valve 27 on the filler bowl 24 side that is rotated in synchronization with the rotating disk 32.The SoThe liquid supplied from the supply pipe 28 to the filler bowl 24,ThatThe container A is filled through the filling valve 27.
  TimesIn the center of the upper side of the rolling filler bowl 24IsMultiple pipesAnd wiring is connectedA rotary joint 33 is provided.ThemPiping, wiringIsClean air, working air, electrical and optical signals, etc.To the rotary joint 33 from the outsideSupplyThat is supplied to the rotating side.In the rotary joint 33, the corresponding fixed side and rotating side piping and wiring are communicated with each other. The electric wiring on the rotating side is a control panel placed above the filler bowl 24.70 (FIG. 2)Connected to this control panel70The filling process is controlled for each filling valve.The You That is, according to a command signal from the control panel 70Then, the electromagnetic control valve opens and closes, and the air is supplied to the main points of the filling valve 27 attached to the filler bowl 24, the lifting air cylinder 26, and the like.,A filling operation is performed.
[0031]
  FIG. 2 shows the detailed structure of the rotary joint 33.As described aboveThe rotary joint 33 is disposed at the upper center of the rotary filling machine,A hollow fixed shaft 62 is provided at the center of the rotary joint 33. The hollow fixed shaft 62 isElectricitySupplySlip ring 72 forIt is an angle detection deviceA fixed side 78a of the rotary encoder;,Optical signalforWith the fixed side 76 of the rotary connectorYeahYes.The slip ring 72 is provided at the upper end portion of the hollow fixed shaft 62, and the fixed side 78 a of the rotary encoder is provided at the lower end portion of the hollow fixed shaft 62. Is disposed in the lower end of the through hole 62 a, that is, in the hollow portion of the hollow fixed shaft 62.In this case, if the communication with the outside by the optical signal is not performed, the hollow fixed shaft 62 need only be hollow.
[0032]
  Hollow fixed shaft 62A rotating body 64 is disposed on the outer side of the rotating shaft concentrically with the hollow fixed shaft 62. The rotating body 64 andHollow fixed shaft 62BetweenBearing 71It can be freely rotated. The rotating body 64 is, Fixed to the rotary part 37 of the rotary filling machineThe rotating portion 37 is rotated together with the rotating portion 37. The rotating body 64 isAirFor supplyIt constitutes the rotation side of the joint, and the air passage 64a, 64bIt has.
[0033]
  A fixed support 66 is disposed on the outer peripheral side of the rotating body 64 via bearings 67 and 68. ThatThe fixed support 66 includes a bearing holding plate 61, a bearing housing 61a, a plurality of joint bodies 66a, and a lower bearing housing 66c.,ThatOutside the bearing holding plate 61SupportThe horizontal rotation is restricted by the member 35.Is supporteding. The fixed support 66 fixes the upper fixing plate 63 by a plurality of support columns 65 in the bearing holding plate 61.supportdoing. AndThe fixed shaft 62 is fixed to the upper fixing plate 63.Yes. Thus, the rotator 64 is rotatably supported between the hollow fixed shaft 62 and the fixed support 66.The bearing holding plate 61Has a through hole and itsThe electrical bushing 83 and the optical signal cable from the outside are attached to the protective bush provided in the through hole.75Is passed. Air pipes 81 and 82 are coupled to the joint body 66 a of the fixed support 66.
[0034]
  Rotating body 64Top ofHas an electricSupplyA brush holding base 68 for holding a brush 68a for taking out electricity from the slip ring 72 is fixed.on the other hand,Rotating body 64A rotary encoder 78 having a rotation angle detection sensor for detecting the rotation angle of the rotating body 64 is provided belowMounted via abutment 88PleaseYes. Also,ThatOn the abutment 88,The rotation side 76a of the optical signal rotary connector is attached. And on the support plate 87 fixed to the rotating body 64,A filling valve control panel 70 is attached.
[0035]
  As will be described later, the air pipes 81 and 82 coupled to the joint body 66a of the fixed support 66 communicate with air passages 64a and 64a provided in the rotating body 64, respectively. Air pipes 81a and 82a are connected to the air passages 64a and 64a at the lower part of the fixed support 66, respectively. OneFrom air piping 82aThe bypass pipe 86 is branched.A pressure reducing valve 85 is disposed in the bypass pipe 86.Yes.This pressure reducing valve 85And the control panel room covered by the cover 91 are connected via a pipe 86a. In this way, part of the air guided to the air pipe 82a is reduced to the pressure reducing valve 85.Decompressed byrear,It is sent to the control panel room via the pipe 86a, and the control panel room is kept at a positive pressure.It looks like. This control room is,The seal 94 is temporarily sealed by a protective bush provided at the packing 94, piping, and wiring outlet.BecauseThe internal pressure may be a low pressure that does not allow outside air to enter through a slight gap.
[0036]
  Hereinafter, the operation of the rotary joint and the air piping, electric wiring, optical signal cable, and encoder coupled thereto will be described. FIG. 3 is a side cross-sectional view clearly showing the fixed portion and the rotating portion of the rotary joint 33, and shows the area of each joint.
[0037]
  2 and 3,The fixed support 66 is coupled to the joint body 66a.Compressed air piping81,82 is supported by a clamp 35a attached to the support member 35,One air pipe 82Clean compressed air is sent,The other air pipe 81 hasWorking compressed air is sent.The supplied compressed air isFormed on the inner peripheral surface of the joint body 66a.From the annular groove 66b,Of the rotating body 64Air passage opening on the outer peripheral surface64b and the rotating body 64Air insideThrough passage 64a,The compressed air pipes 81a and 82a on the rotation side are sent.
[0038]
  Clean air,Piping 82a is divided into piping for each filling valve 27 in FIG.Working part and fillingLiquid (in the case of beverages, etc.)DirectlyIt becomes the working air for the touched part. In contrast, piping 81aSupplied fromCompressed air,Each filling valve 27everyDivided into pipes,fillingLiquidDirectlyUntouched parts (for example, raising and lowering the containerFor airCylinder26) Air for operation. The sliding portions of the air joint are provided above and below the annular groove 66b of the joint body 66a.Has beenSealed by an O-ring 74 fitted in the seal groove.
[0039]
  on the other hand,The electrical wiring 83 connected to the external power source passes through a hole formed in the bearing holding plate 61., Formed between the cover 93 andA slip ring that enters the slip ring chamber and is attached to the hollow fixed shaft 6272Connected to Current,Slip ring72From,Flows to the brush 68a of the rotating brush holder 68TheThe wiring 83a coupled to the contact piece of the brush 68a is,Rotating body 64Is provided inThe control panel 70 in the control panel chamber passes through the through hole 64c.Power supplyConnected to the input section.
[0040]
  Also,The optical signal cable 75 for transmitting a signal from the outside is supported by the clamp 35 a, then enters the slip ring chamber through the hole formed in the bearing holding plate 61, passes through the through hole 62 a of the hollow fixed shaft 62, and is fixed in the hollow state. Light fixed to the bottom of the shaft 62For signalCoupled to the fixed side 76 of the rotary connectorThe The optical signal is transmitted to the fixed side 76 of the rotary connector.The optical signal passes through a small space and is transmitted to the rotating side 76a of the optical signal rotary connector fixed to the rotating body 64.ThatThe signal is transmitted to the control panel 70 by the rotation side optical signal cable 75a coupled to the rotation side 76a of the optical signal rotary connector.The And, Where it is converted into an electrical signal.
[0041]
  The rotation angle detection sensor provided on the rotary side 78 of the rotary encoder is a rotating body.64The rotation angle is detected and this signal is sent to the control panel 70. In the control panel 70Is, Voltage conversion, AC → DC conversion, program operationEtc., and the command signal isoutputIs done. And by this command signal,Actuate filling valve 27 (Fig. 1)LetSwitch valve 36ButActuatedThisTheAlso,The rotary side 78 of the rotary encoder isDetectedThe operation timing of each filling valve 27 is instructed to the electric circuit of the control panel 70 based on the rotation angle.On the other hand, it is input to the control panel 70 via the optical signal rotary connectors 76 and 76a.Optical signal,An instruction to change the operation program of the filling valve 27 is given.
[0042]
  In the above rotary joint, air supplyforElectricity above the fixed support 66 of the jointSupplySlip ring 72andA brush holder 68 is disposed, and optical signal rotary connectors 76 and 76a are provided below the fixed support 66.andSince the rotary encoders 78 and 78a are disposed, the electricity from which wear powder is generated.SupplySlip ring 72 and light that requires a clean atmosphereFor signalThe rotary connectors 76 and 76a can be sufficiently separated from each other, and the influence of noise generated in the slip ring 72 can be avoided for the rotary encoders 78 and 78a. At the same time, by providing the optical signal rotary connectors 76 and 76a and the rotary encoders 78 and 78a in the control panel chamber, the wiring can be shortened and the intrusion of noise can be reduced.
[0043]
  The control panel 70 is surrounded by a control panel cover 91.TogetherEnclose the periphery of the slip ring 72 for supplying electricity with a cover 93.TheseMake positive pressure in the enclosureBy, Control panel 70 and slip ring 72AroundWater and moisture can be prevented from entering the water. Furthermore, from inside the control panel 70In that roomAir,Through hole 64c of the rotating body 64TheThroughTheSent to the slip ring 72 for electricity supplyRThe roomFormEjected through gap in cover 93To letBy doing so, it is possible to prevent the wear powder generated in the slip ring 72 from entering the lower control panel 70 chamber.
[0044]
【The invention's effect】
  As described above, according to the rotary joint of the present invention, the filling valve control panel, the angle detection device (particularly the rotary encoder), and in some cases, the optical signal rotary connector are electrically connected.SupplyBecause it can be arranged away from the slip ring forThatElectricitySupplyWear powder generated in slip rings and electricitySupplyThe influence of the noise generated by the slip ring can be minimized.
  Also electricSupplySlip ringCoveringCoverBecause it can be attached to the fixed part,Easy shapeSeeEasy to manufactureNot only, Installation and removal during maintenance and inspectionAlsoEasySupposebe able to.
  Furthermore, according to the rotary joint of the present invention,Even when a rotary encoder is used as the angle detector,Since the output side of the encoder can be easily provided near the rotation side, wiringTheShortCan, Avoid the effects of noise.
  In addition, the control panel room is made positive pressure with clean air,ofAir,Rotating bodyIs provided inThrough holeTheThroughTheSend to the slip ring room for electricity supplyR, Discharge from the gap in the cover of this slip ring chamber for electricity supplyTo letBy doing so, it is possible to prevent wear powder from entering the control panel room and to prevent water and moisture from entering the filling valve control panel and the slip ring chamber.
  further,When a rotary encoder is used as the angle detection device,Configured so that the output of the rotary encoder is outside the center of the rotary jointBecause you canBy setting the central part of the rotary encoder to the fixed side, the signal transmission system to the control panel of the rotating filling valve becomes outside.Can beThe structure becomes very simple.
[Brief description of the drawings]
FIG. 1 is an overall side cross-sectional view of a rotary filling machine provided with a rotary joint according to an embodiment of the present invention.
FIG. 2 is a side cross-sectional view showing a rotary joint of B part in FIG.
3 is a side cross-sectional view clearly showing a rotating portion of the rotary joint of FIG. 2. FIG.
FIG. 4 is a plan view showing an example of a conventional rotary filling machine.
5 is a cross-sectional view taken along the line IV-IV in FIG.
FIG. 6 is a longitudinal sectional view of a conventional rotary joint.
[Explanation of symbols]
  33 Rotary joint
  62 Hollow fixed shaft
  64 Rotating body
  66 Fixed support
  68 Brush holder
  70 Control panel
  72 slip ring
  75 Optical signal cable
  76 lightFor signalFixed side of rotary connector
  76a lightFor signalRotary side of the rotary connector
  78 Rotary side of rotary encoder
  91 Control panelRoomCover
  93Slip ring chambercover

Claims (8)

A plurality of filling valves have been arranged on the circumference, receiving container under the filling valve while rotating, after filling the liquid sequentially the vessel during its rotation, so as to discharge the same container to the outside provided the rotary filling machine, in a rotary joint for supplying air and electric externally to the rotating portion of the rotary filling machine,
Have been arranged in the center of the rotary filling machine, a fixed shaft fixed side of the slip ring and the angle detection device for an electrical supply are provided,
It has been arranged in the fixed shaft and concentrically with the outer peripheral side of the fixed shaft with being fixed to the rotating portion so as to rotate integrally with the rotary part of the rotary filling machine, the air supply joint An air passage through which air supplied from the rotation side and the joint passes , and a rotating body provided with a rotation side of the angle detection device;
It has been disposed through a bearing on the outer peripheral side of the rotating body, together with the supporting integrally said fixed shaft, a pipe for supplying air to the stationary side and the joint of supply joint of the air parts, and the stationary supporting member which supports the wiring for supplying electricity to the slip ring,
Have been fixed to the rotating body, and a brush holder for holding brushes for taking out electricity from the slip ring for the electrical supply,
A filling valve control panel which is attached to the rotating body and operates the filling valve based on a rotation angle signal of the rotating body sent from the angle detection device ;
A rotary joint characterized by comprising : In the rotary joint according to claim 1, rotary joint, characterized in that the air upwardly to the electrical supply slip rings supply joint, it is the angle detector downward are disposed respectively. The rotary joint according to claim 2, wherein the angle detection device is provided in the vicinity of the filling valve control panel that rotates integrally with a rotating portion of the rotary filling machine. A plurality of filling valves have been arranged on the circumference, receiving container under the filling valve while rotating, after filling the liquid sequentially the vessel during its rotation, so as to discharge the same container to the outside provided the rotary filling machine, in a rotary joint for supplying air from the outside to the rotary part of the rotary filling machine, electricity and signals,
The optionally be disposed in the center of the rotary filling machine, a hollow fixed shaft slip ring for supplying electricity, fixed side of the angle detection device and that the fixed side of the rotary connector for optical signals is provided,
Above in conjunction with and is disposed in the hollow fixed shaft on the outer peripheral side concentrically of the hollow fixed shaft is fixed to the rotating portion so as to rotate integrally with the rotation of the rotary filling machine, for the supply of the air a rotating body air passage air passes, and the rotation side and the rotary side of the rotary connector the optical signal of the angle detection device is provided respectively supplied from the rotary side and the joint of the joint,
Have been disposed through a bearing on the outer peripheral side of the rotating body, together with the supporting integrally said hollow fixed shaft, for supplying air to the stationary side and the joint of supply joint of the air pipe unit, and a wiring portion for the electrical supply to the slip ring, and a fixed support which supports respectively the optical signal cable is connected to the fixed side of the rotary connector the optical signal,
Have been fixed to the rotating body, and a brush holder for holding brushes for taking out electricity from the slip ring for the electrical supply,
Based on the rotation angle signal of the rotation body that is attached to the rotation body and sent from the angle detection device, and the signal from the outside transmitted through the optical signal cable and the optical signal rotary connector, and a filling valve control panel to operate the filling valve,
A rotary joint, wherein a fixed side of the optical signal rotary connector is disposed in a hollow portion of the hollow fixed shaft . In the rotary joint according to claim 4, said electrical supply slip ring is disposed above the supply joint of the air, for the upper Symbol optical signals rotary connector and the angle detection device is arranged below A rotary joint characterized by that.   5. The rotary joint according to claim 4, wherein the optical signal rotary connector and the angle detection device are provided in the vicinity of the filling valve control panel that rotates integrally with a rotary portion of the rotary filling machine. Rotary joint characterized by 7. The rotary joint according to claim 3, wherein the filling valve control panel and the electricity supply slip ring are respectively disposed in an air chamber maintained at a positive pressure. Rotary joint. In the rotary joint according to claim 7, the positive pressure air in the room of the filling valve control panel, is sent to the room of the electric supply slip ring through the through hole provided in the rotating body, the electric for supplying rotary joint, characterized in that have been made so that discharged from the gap between the cover forming a chamber of the slip ring.

Images