WO2019044006A1 - エアシリンダ用流体回路およびその設計方法 - Google Patents

エアシリンダ用流体回路およびその設計方法 Download PDF

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Publication number
WO2019044006A1
WO2019044006A1 PCT/JP2018/009844 JP2018009844W WO2019044006A1 WO 2019044006 A1 WO2019044006 A1 WO 2019044006A1 JP 2018009844 W JP2018009844 W JP 2018009844W WO 2019044006 A1 WO2019044006 A1 WO 2019044006A1
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WIPO (PCT)
Prior art keywords
pipe
air cylinder
fluid circuit
cylinder
conductance
Prior art date
Application number
PCT/JP2018/009844
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
▲高▼田芳行
浅葉毅
風間晶博
妹尾満
張護平
Original Assignee
Smc株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2017197673A external-priority patent/JP2019044952A/ja
Application filed by Smc株式会社 filed Critical Smc株式会社
Priority to US16/640,499 priority Critical patent/US20200355203A1/en
Priority to CN201880056210.9A priority patent/CN111051705A/zh
Priority to KR1020207008935A priority patent/KR20200042943A/ko
Priority to EP18849938.8A priority patent/EP3677794A1/en
Priority to MX2020002180A priority patent/MX2020002180A/es
Priority to RU2020112531A priority patent/RU2020112531A/ru
Priority to BR112020004216-1A priority patent/BR112020004216A2/pt
Publication of WO2019044006A1 publication Critical patent/WO2019044006A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam

Definitions

  • the present invention relates to a fluid circuit for supplying and discharging fluid in an air cylinder and a method of designing the same.
  • a speed controller (variable orifice mechanism) is provided in the fluid circuit of the air cylinder, and the moving speed of the piston is adjusted by adjusting the flow rate of compressed air supplied to the air cylinder or the flow rate of compressed air discharged from the air cylinder.
  • Technology is known.
  • Japanese Patent Application Laid-Open No. 2011-012746 discloses a fluid pressure system in which a speed controller capable of adjusting the flow rate of pressure fluid supplied to a fluid pressure cylinder is provided in a pipe connecting a port of the fluid pressure cylinder and a drive switching valve. Is described.
  • Japanese Patent Application Laid-Open No. 2017-089820 describes that a speed controller is disposed at a position away from the cylinder, and the cylinder and the speed controller are connected by a pipe provided with a volume reduction portion. According to this, even if the pipe lengthens, the moving speed of the piston can be adjusted with high accuracy.
  • the piping constituting the fluid circuit of the air cylinder is usually set to a large effective cross-sectional area, so the compressed air stored in the piping without reaching the inside of the air cylinder is discharged from the switching valve. It will be released to the atmosphere when switching to position. That is, there is a considerable amount of compressed air that can be discarded without directly contributing to the operation of the air cylinder, and the consumption of compressed air increases.
  • the speed controller is not mounted, it is also necessary to provide a fixed orifice as a reference resistance of the fluid circuit at the port of the air cylinder or the like.
  • the volume of piping is made small in Unexamined-Japanese-Patent No. 2017-089820, it does not aim at consumption reduction of compressed air.
  • the present invention is designed such that the reference resistance of the fluid circuit is substantially determined by the piping, and it is an object of the present invention to simplify the fluid circuit by eliminating the need to provide a fixed orifice and to reduce the consumption of compressed air. I assume.
  • the fluid circuit for an air cylinder according to the present invention is such that the switching valve for switching the supply and discharge of compressed air and the cylinder port portion of the air cylinder are connected by piping, and the sonic conductance of the piping is the switching valve and the cylinder port portion It is characterized in that it is smaller than the sound velocity conductance of
  • the resistance of the entire circuit is most affected by the piping, so there is no need to provide a fixed orifice in the air cylinder (there is no need to process a minute hole in the air cylinder). In addition, the consumption of compressed air can be reduced.
  • the sonic conductance of the pipe is equal to or less than 1/2 of the sonic conductance of the switching valve and the cylinder port portion. According to this, since the resistance of the entire circuit is determined by the piping, it is not necessary to provide a fixed orifice in the air cylinder, and the operating speed of the air cylinder can be set based on the piping.
  • the sonic conductance of the pipe needs to be smaller than the sonic conductance of the speed controller.
  • the sound velocity conductance of the pipe is equal to or less than 1/2 of the sound velocity conductance of the switching valve, the cylinder port portion and the speed controller. According to this, even when the speed controller is interposed between the pipe and the cylinder port portion, the resistance of the entire circuit is controlled by the pipe.
  • the sonic conductance of the pipe is approximately 1/2 of the sonic conductance of the speed controller, the working speed is adjusted with good sensitivity within the range up to a predetermined amount lower than the working speed as the maximum working speed. can do.
  • the sonic conductance of the pipe needs to be smaller than the sonic conductance of the silencer.
  • the sound velocity conductance of the pipe is equal to or less than 1/2 of the sound velocity conductance of the switching valve, the cylinder port portion and the silencer. According to this, even when the exhaust port of the switching valve is provided with a silencer, the resistance of the entire circuit is controlled by the piping.
  • the design method of a fluid circuit for an air cylinder is a design method of a fluid circuit for an air cylinder in which the switching valve for switching the supply and discharge of compressed air and the cylinder port portion of the air cylinder are connected by piping. Then, select a predetermined one from the air cylinder database, the piping database, and the switching valve database, and design so that the sonic conductance of the piping is smaller than the sonic conductance of the switching valve and cylinder port portion. It features. If the fluid circuit for the air cylinder has a speed controller or silencer, select a predetermined one from the speed controller database or silencer database, and design so that the sonic conductance of the piping is smaller than their sonic conductance. Do. With this design, the piping can roughly determine the reference resistance of the fluid circuit.
  • the fluid circuit for an air cylinder since the resistance of the entire circuit is controlled by the pipe, there is no need to provide a fixed orifice in the air cylinder, and the fluid circuit can be simplified. In addition, the consumption of compressed air can be reduced.
  • FIG. 1 is a schematic view of a fluid circuit for an air cylinder according to an embodiment of the present invention.
  • 2A is an enlarged view of a portion A of the fluid circuit for the air cylinder of FIG. 1
  • FIG. 2B is an enlarged view of a portion B of the fluid circuit for the air cylinder of FIG.
  • FIG. 3 is a view showing the relationship between the inner diameter, the length and the sonic conductance of the pipe.
  • FIG. 4 is a part of a flowchart according to a method of designing a fluid circuit for an air cylinder of FIG.
  • FIG. 5 is the rest of the flowchart according to the method of designing the air cylinder fluid circuit of FIG.
  • reference numeral 10 denotes a fluid circuit for an air cylinder according to an embodiment of the present invention.
  • the air cylinder fluid circuit 10 is formed by connecting a double acting air cylinder 12 and a switching valve 14 by a first pipe 16 and a second pipe 18.
  • the air cylinder 12 includes a cylinder tube 20, an end cover 22, a rod cover 24, a piston 26 and a piston rod 28.
  • the end cover 22 is fixed to one axial end of the cylindrical cylinder tube 20, and the rod cover 24 is fixed to the other axial end of the cylinder tube 20.
  • a piston 26 is slidably provided inside the cylinder tube 20, and the other end of a piston rod 28 connected to the piston 26 at one end is inserted into the rod cover 24 and extends to the outside.
  • An internal space of the cylinder tube 20 is divided into a first cylinder chamber 30 on the end cover 22 side and a second cylinder chamber 32 on the rod cover 24 side.
  • the end cover 22 is provided with a first cylinder port portion 34 for supplying and discharging compressed air to the first cylinder chamber 30.
  • the first cylinder port portion 34 has an opening 34 a that opens to the side surface of the end cover 22 and a hole 34 b following it.
  • the rod cover 24 is provided with a second cylinder port portion 36 for supplying and discharging compressed air to the second cylinder chamber 32.
  • the second cylinder port portion 36 has an opening 36a opening to the side surface of the rod cover 24 and a hole 36b following it.
  • the first speed controller 38 is attached to the opening 34 a of the first cylinder port 34, and the second speed controller 40 is attached to the opening 36 a of the second cylinder port 36.
  • the first speed controller 38 is capable of manually adjusting the flow rate of the compressed air discharged from the first cylinder chamber 30, and the second speed controller 40 controls the flow rate of the compressed air discharged from the second cylinder chamber 32. Is manually adjustable. That is, although the first speed controller 38 and the second speed controller 40 are of the type called meter out, they may be of the type called meter in which can adjust the flow rate of the compressed air supplied to the cylinder chamber.
  • a needle valve 38b is disposed inside a pipe joint 38a.
  • the pipe joint 38 a has a port connection portion 38 d connected to the first cylinder port portion 34 of the air cylinder 12 and a pipe connection portion 38 e connected to the first pipe 16.
  • a needle valve 40b is disposed inside a pipe joint 40a.
  • the pipe joint 40 a has a port connection portion 40 d connected to the second cylinder port portion 36 of the air cylinder 12 and a pipe connection portion 40 e connected to the second pipe 18.
  • the switching valve 14 includes a valve housing 42, a spool 44, an electromagnetic coil 46, a spring 48, and the like.
  • the valve housing 42 is connected to the supply port 56 connected to the compressor 54 through the supply pipe 50 and the pressure reducing valve 52, the first output port 58 connected to the first pipe 16, and the second pipe 18. It has two output ports 60 and two exhaust ports 62a, 62b connected to the atmosphere.
  • a spool 44 is slidably disposed within the valve housing 42. Each exhaust port 62a, 62b is provided with a silencer 64a, 64b.
  • the spool 44 When the electromagnetic coil 46 is not energized, the spool 44 is held at the first position by the biasing force of the spring 48, and when the electromagnetic coil 46 is energized, the spool 44 moves to the second position against the biasing force of the spring 48. .
  • the first output port 58 When the spool 44 is in the first position, the first output port 58 is connected to the exhaust port 62a and the second output port 60 is connected to the supply port 56 (see FIG. 1).
  • the first output port 58 When the spool 44 is in the second position, the first output port 58 is connected to the supply port 56 and the second output port 60 is connected to the exhaust port 62b.
  • the air cylinder fluid circuit 10 is designed such that the resistance of the entire circuit is most affected by the first pipe 16 and the second pipe 18. That is, the sonic conductance of the first pipe 16 and the second pipe 18 is determined by the switching valve 14, the first cylinder port 34, the second cylinder port 36, the first speed controller 38, the second speed controller 40 and the silencers 64 a and 64 b. It is designed to be smaller than each sound velocity conductance. In particular, when the sonic conductance of the first pipe 16 and the second pipe 18 is 1/2 or less of the sonic conductance of each circuit element, the resistance of the entire circuit is determined by the first pipe 16 and the second pipe 18, and It does not depend on each circuit element.
  • the sound velocity conductance is a predetermined coefficient of the flow rate display formula according to the ISO method adopted by the JIS standard of 2000 (JIS B 8390-2000), and like the effective cross-sectional area or CV value, represents the ease of air flow. It is an index.
  • the unit of the sonic conductance is dm 3 / (s ⁇ bar). The smaller the sonic conductance, the greater the resistance when air flows.
  • FIG. 3 shows the relationship between the inner diameter of the pipe, the length of the pipe, and the sonic conductance of the pipe. Specifically, when the inner diameter of the pipe was 5.0 mm, 4.0 mm, 3.0 mm, 2.0 mm and 1.0 mm, the pipe length was changed in the range of 0.1 to 5.0 m. It shows the value of the sound velocity conductance at the time. As shown in FIG. 3, the sonic conductance is smaller as the inner diameter of the pipe is smaller, and the sonic conductance is smaller as the pipe is longer. For example, when the length of the pipe is 2 m, the sound velocity conductances when the inner diameter of the pipe is the above values are 1.63, 0.92, 0.44, 0.15, and 0.02, respectively.
  • each circuit element in the air cylinder fluid circuit 10 including the first pipe 16 and the second pipe 18 is designed as follows, for example.
  • the inner diameters of the first pipe 16 and the second pipe 18 are 3.0 mm, and the lengths thereof are 2.0 m. As a result, the sonic conductances of the first pipe 16 and the second pipe 18 are both 0.44.
  • the lengths of the first pipe 16 and the second pipe 18 are basically determined according to the installation environment of the air cylinder 12 and the switching valve 14 (the installation distance between the air cylinder 12 and the switching valve 14). It is
  • the inner diameter of each of the hole portions 34b and 36b is 10.9 mm.
  • the sonic conductance of the first cylinder port portion 34 and the second cylinder port portion 36 becomes 16.8.
  • the holes 34b and 36b of the first cylinder port 34 and the second cylinder port 36 are designed to have an inner diameter of about 2 mm in order to function as fixed orifices.
  • the switching valve 14 has a sonic conductance of 1.92, and the silencers 64a and 64b have a sonic conductance of 2.0.
  • Each of the first speed controller 38 and the second speed controller 40 employs a sonic conductance of 0.88.
  • the sonic conductance of the first pipe 16 and the second pipe 18 is controlled by the switching valve 14, the first cylinder port 34, the second cylinder port 36, the first speed controller 38, and the second speed controller 40 and 1/2 or less of the sound velocity conductance of each of the silencers 64a and 64b. Therefore, the resistance of the entire air cylinder fluid circuit 10 is determined by the first pipe 16 and the second pipe 18. Further, the sonic conductance of the first pipe 16 and the second pipe 18 is exactly 1/2 of the sonic conductance of the first speed controller 38 and the second speed controller 40.
  • the fluid circuit 10 for an air cylinder according to the embodiment of the present invention and the specific design example thereof are as described above, and the operation and effects will be described next.
  • the compressed air supplied from the compressor 54 through the pressure reducing valve 52 is supplied into the second pipe 18 through the supply port 56 and the second output port 60 of the switching valve 14. Be done.
  • the compressed air supplied into the second pipe 18 is supplied to the second cylinder chamber 32 through the second speed controller 40 and the second cylinder port portion 36.
  • compressed air in the first cylinder chamber 30 passes through the first cylinder port portion 34, and after the flow rate is adjusted by the first speed controller 38, is discharged into the first pipe 16.
  • the compressed air discharged into the first pipe 16 passes through the first output port 58 and the exhaust port 62a of the switching valve 14, and is further discharged to the atmosphere through the silencer 64a. Thereby, the piston 26 is driven toward the end cover 22 and the piston rod 28 is retracted.
  • the compressed air supplied from the compressor 54 through the pressure reducing valve 52 passes through the supply port 56 and the first output port 58 of the switching valve 14. It is supplied into the first pipe 16.
  • the compressed air supplied into the first pipe 16 is supplied to the first cylinder chamber 30 through the first speed controller 38 and the first cylinder port portion 34.
  • compressed air in the second cylinder chamber 32 passes through the second cylinder port portion 36, is adjusted in flow rate by the second speed controller 40, and is then discharged into the second pipe 18.
  • the compressed air discharged into the second pipe 18 passes through the second output port 60 and the exhaust port 62b of the switching valve 14, and is further discharged to the atmosphere through the silencer 64b. Thereby, the piston 26 is driven toward the rod cover 24 and the piston rod 28 is pushed out.
  • the consumption amount of the compressed air due to the compressed air stored inside the first pipe 16 and the second pipe 18 being discharged from the exhaust ports 62a and 62b of the switching valve 14 will be described. Assuming that the consumption of the compressed air when the inner diameter of the first pipe 16 and the second pipe 18 is 5.0 mm is 100, the inner diameter of the first pipe 16 and the second pipe 18 is 4.0 mm, 3.0 mm, The consumption of the compressed air in the case of 2.0 mm and 1.0 mm is 64, 36, 16, 4 respectively. That is, by reducing the inner diameters of the first pipe 16 and the second pipe 18, the consumption of the compressed air is significantly reduced.
  • the maximum operating speed of the air cylinder 12 (maximum driving speed of the piston 26) also depends on the inner diameter of the cylinder tube 20 and the like, but in the above design example, a value corresponding to the sonic conductance of the first pipe 16 and the second pipe 18 It becomes.
  • the operating speed of the air cylinder 12 can be adjusted in the range from the maximum operating speed to a speed lower than that by a predetermined amount by using the first speed controller 38 and the second speed controller 40.
  • the knob 38c and the knob 40c all The operating speed of the air cylinder 12 can be adjusted effectively in the range.
  • the air cylinder 12 is provided with a fixed orifice. There is no need. Moreover, since the internal diameter of the 1st piping 16 and the 2nd piping 18 is small, the consumption of compressed air can be reduced. Furthermore, the maximum operating speed of the air cylinder 12 can be determined based on the first pipe 16 and the second pipe 18.
  • the first speed controller 38 and the second speed controller 40 are attached to the first cylinder port portion 34 and the second cylinder port portion 36, respectively.
  • the two-speed controller 40 may not be mounted. That is, the first pipe 16 and the second pipe 18 may be directly connected to the first cylinder port 34 and the second cylinder port 36, respectively.
  • the silencers 64a and 64b are provided in the exhaust ports 62a and 62b of the switching valve 14, the silencers 64a and 64b may not be provided.
  • a database necessary for designing the air cylinder 12, the first pipe 16, the second pipe 18, the first speed controller 38, the second speed controller 40, and the silencers 64a and 64b of the air cylinder fluid circuit 10 is created in advance and There is. That is, an air cylinder database, a piping database, a speed controller database, a switching valve database, and a silencer database are created.
  • the air cylinder database comprises a plurality of air cylinder data, and each air cylinder data includes the inner diameter of the cylinder tube (the bore diameter of the cylinder) and the sonic conductance of the cylinder port.
  • the piping database comprises a plurality of piping data, and each piping data includes the inner diameter of the piping.
  • the speed controller database comprises a plurality of speed controller data, and each speed controller data includes the sonic conductance of the speed controller.
  • the switching valve database comprises a plurality of switching valve data, and each switching valve data includes the sonic conductance of the switching valve.
  • the silencer database consists of a plurality of silencer data, and each silencer data includes the sonic conductance of the silencer.
  • one air cylinder is selected from the air cylinder database based on conditions such as the stroke amount of the air cylinder 12, the air pressure supplied to the air cylinder 12, the load of the air cylinder 12, and the like.
  • the pipe with the smallest inner diameter is selected from the piping database, and in S4, the length of the first pipe 16 and the length of the second pipe 18 are taken into consideration, and the pipes of the first pipe 16 and the second pipe 18 are selected.
  • the sonic conductance is determined.
  • S5 it is determined whether the sonic conductance of the first pipe 16 and the second pipe 18 obtained in S4 is smaller than the sonic conductance of the cylinder port portion of the air cylinder selected in S2. If it is determined that the sonic conductance of the first pipe 16 and the second pipe 18 is smaller than the sonic conductance of the cylinder port portion, the process proceeds to S6. If not, the process returns to S2, and the air cylinder is selected again except for the air cylinder already selected.
  • the stroke time of the air cylinder is simulated and calculated based on the sound velocity conductance of the first pipe 16 and the second pipe 18 obtained in S4, the sound velocity conductance of the air cylinder selected in S2, the inner diameter of the cylinder tube, etc. Ru.
  • the value calculated at S6 is compared with the required stroke time. When it is determined that the calculated value is larger than the required stroke time, that is, when it is determined that the request is not satisfied, the process proceeds to S8. If it is determined that the calculated value is equal to or less than the required stroke time, that is, if it is determined that the request is satisfied, then the flow shifts to S9.
  • a speed controller having a larger sonic conductance than the first pipe 16 and the second pipe 18 and having the smallest sonic conductance among them is selected.
  • a switching valve having a larger sonic conductance than the first pipe 16 and the second pipe 18 and having the smallest sonic conductance is selected.
  • a silencer having a sonic conductance larger than that of the first pipe 16 and the second pipe 18 and having the smallest sonic conductance is selected.
  • the value calculated at S10 is compared with the required stroke time. If it is determined that the calculated value is larger than the required stroke time, the process returns to S9, and the selected one of the previously selected speed controller, switching valve and silencer with the smallest sonic conductance is selected again. For example, when the sound velocity conductance of the previous speed controller is smaller than the sound velocity conductance of the previous switching valve and silencer, the sound velocity conductance of the speed controller is selected one larger than the previous one, and the switching valve and silencer are the same as the previous one. The one is selected.
  • the sonic conductance of the first pipe 16 and the second pipe 18 corresponds to the cylinder port portion of the air cylinder 12, the first speed controller 38, the second speed controller 40, the switching valve 14, and the silencer 64a.
  • the design is simple.
  • the sound velocity conductance is selected from among the speed controllers which are simply larger than the piping, but may be selected from among the speed controllers whose sound velocity conductance is twice or more that of the piping. The same applies to the switching valve and the silencer.
  • the fluid circuit for an air cylinder according to the present invention and the design method thereof are not limited to the above-described embodiment and design example, and it goes without saying that various configurations can be adopted without departing from the scope of the present invention. .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
PCT/JP2018/009844 2017-08-30 2018-03-14 エアシリンダ用流体回路およびその設計方法 WO2019044006A1 (ja)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US16/640,499 US20200355203A1 (en) 2017-08-30 2018-03-14 Air cylinder fluid circuit and method for designing same
CN201880056210.9A CN111051705A (zh) 2017-08-30 2018-03-14 气缸用流体回路及其设计方法
KR1020207008935A KR20200042943A (ko) 2017-08-30 2018-03-14 에어 실린더용 유체회로 및 그 설계 방법
EP18849938.8A EP3677794A1 (en) 2017-08-30 2018-03-14 Air cylinder fluid circuit and method for designing same
MX2020002180A MX2020002180A (es) 2017-08-30 2018-03-14 Circuito de fluido de cilindro de aire y método para diseñar el mismo.
RU2020112531A RU2020112531A (ru) 2017-08-30 2018-03-14 Гидросистема для воздушного цилиндра и способ ее проектирования
BR112020004216-1A BR112020004216A2 (pt) 2017-08-30 2018-03-14 circuito de fluido de cilindro de ar e método para projetar o mesmo

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2017165113 2017-08-30
JP2017-165113 2017-08-30
JP2017-197673 2017-10-11
JP2017197673A JP2019044952A (ja) 2017-08-30 2017-10-11 エアシリンダ用流体回路およびその設計方法

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WO2019044006A1 true WO2019044006A1 (ja) 2019-03-07

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WO (1) WO2019044006A1 (es)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000179503A (ja) * 1998-12-16 2000-06-27 Smc Corp 空気圧機器の選定方法
JP2003114913A (ja) * 2001-10-05 2003-04-18 Smc Corp 空気圧機器選定システム、空気圧機器選定方法、空気圧機器選定プログラム及び記録媒体
JP2011012746A (ja) 2009-07-01 2011-01-20 Smc Corp 流体圧システムの漏れ検出機構及び検出方法
JP2017089820A (ja) 2015-11-13 2017-05-25 株式会社ディスコ 配管

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000179503A (ja) * 1998-12-16 2000-06-27 Smc Corp 空気圧機器の選定方法
JP2003114913A (ja) * 2001-10-05 2003-04-18 Smc Corp 空気圧機器選定システム、空気圧機器選定方法、空気圧機器選定プログラム及び記録媒体
JP2011012746A (ja) 2009-07-01 2011-01-20 Smc Corp 流体圧システムの漏れ検出機構及び検出方法
JP2017089820A (ja) 2015-11-13 2017-05-25 株式会社ディスコ 配管

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