JP4680394B2 - Sequential cylinder system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sequential operation cylinder system including a plurality of fluid pressure cylinders and sequentially operating rods.
[0002]
[Prior art]
The sequential operation cylinder system includes a plurality of air cylinders as fluid pressure cylinders. An integrated moving body is accommodated in the cylinder tube of each air cylinder so as to be able to reciprocate. The internal space of the cylinder tube is partitioned into a head side pressure acting chamber and a rod side pressure acting chamber due to the presence of the piston. The rod protrudes when pressurized air is supplied to the head-side pressure acting chamber of the cylinder tube, and the rod is retracted when pressurized air is supplied to the rod-side pressure acting chamber.
[0003]
In the conventional sequential operation cylinder system, the rods of the other air cylinders are operated after the operation of the rods of the air cylinders is completed. In order to obtain this operation, in a conventional sequential operation cylinder system, a switching electromagnetic valve is provided for each air cylinder, and each switching electromagnetic valve is individually controlled to be opened and closed by a controller.
[0004]
For example, the case where there are two air cylinders will be specifically described. It is assumed that all the rods of each air cylinder are in an immersed state before protruding the rod. In this state, one rod is protruded by supplying pressurized air to the head side pressure acting chamber of one air cylinder. When the rod reaches the stroke end, the controller controls the opening and closing of each switching valve, stops supplying pressurized air to one cylinder tube, and supplies pressurized air to the other cylinder tube. Thus, the other rod is caused to protrude by supplying pressurized air to the head side pressure acting chamber of the other air cylinder. Further, when the rod of each air cylinder is immersed, the pressurized air is supplied to the rod side pressure working chamber of each cylinder tube by the operation opposite to the above-described operation.
[0005]
[Problems to be solved by the invention]
However, the conventional sequential operation cylinder system requires as many switching solenoid valves as the number of air cylinders. Number of switching solenoid valves Will also increase. Therefore, there is a problem that the manufacturing cost increases and the structure of the sequentially operating cylinder system becomes complicated.
[0006]
The present invention has been made in view of the above problems, and its purpose is to provide a switching solenoid valve. number It is an object of the present invention to provide a sequential operation cylinder system having a low cost and a simple structure.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the invention according to claim 1 has a movable body capable of reciprocating in the cylinder tube. As well as , Said By moving body Said Cylinder tube Inside The fluid pressure cylinder is divided into a head side pressure action chamber and a rod side pressure action chamber. Two Provided, Said Head side pressure working chamber or Said By supplying fluid to the rod side pressure working chamber, The two Provided in the hydraulic cylinder Said In a sequential operation cylinder system in which a moving body is sequentially moved at a predetermined timing, Of the two hydraulic cylinders at least Either one A fluid supply path for supplying fluid to the fluid pressure cylinder Preparation , Said Fluid supply path The flow A switching valve that switches the body supply direction Preparation The above Two Fluid pressure cylinder Said Head side pressure chamber Is Communicating with each other by the first channel Be done With The two hydraulic cylinders Rod side pressure chamber Is Communicating with each other by the second flow path Is , The one provided on either one of the two fluid pressure cylinders When the moving body moves to a predetermined position , The first flow path and Said An opening / closing means for mechanically opening and closing at least one of the second flow paths; The opening / closing means includes an air supply pipe disposed in one of the two fluid pressure cylinders in the head-side pressure acting chamber, and the air supply pipe extends along a moving direction of the moving body. And the length of the air supply pipe is such that when the mobile body moves near the rod side stroke end, the mobile body is detached from the end of the air supply pipe. Is set to This is the gist.
[0010]
Claim 2 In the invention according to claim 1, in the sequential operation cylinder system according to claim 1, The opening / closing means includes Mechanical valve provided in the second flow path Before and further The mechanical valve The two One of the fluid pressure cylinders Provided in the fluid pressure cylinder When the moving object moves near the stroke end, Said The gist is that the second flow path is mechanically opened and closed by contact with any one of the moving bodies.
[0011]
The “action” of the present invention will be described below.
Claim 1 Or 2 According to the above-described invention, when a fluid is supplied to the head-side pressure acting chamber of a specific fluid pressure cylinder among a plurality of fluid pressure cylinders, the moving body provided in the specific fluid pressure cylinder starts to move. When the moving body reaches a predetermined position, the flow path connecting the fluid pressure cylinders is opened by the opening / closing means. Thereby, the fluid is also supplied from the specific fluid pressure cylinder to the other fluid pressure cylinder, and the moving body provided in the other fluid pressure cylinder starts moving.
[0012]
Claim 1 According to the above-described invention, when a fluid is supplied to the head side pressure acting chamber of one of the fluid pressure cylinders, one of the moving bodies starts to move toward the rod side stroke end. When one moving body reaches the vicinity of the rod-side stroke end, the moving body is separated from the end of the air supply pipe, so that the end of the air supply pipe is opened. Along with this opening, the head side pressure working chambers of both fluid pressure cylinders communicate with each other. As a result, the fluid is supplied to the head side pressure acting chamber of the other fluid pressure cylinder, and the other moving body starts to move toward the rod side stroke end.
[0014]
Claim 2 According to the above-described invention, when a fluid is supplied to the head side pressure acting chamber of one of the fluid pressure cylinders, one of the moving bodies starts to move toward the rod side stroke end. When one moving body reaches the vicinity of the rod-side stroke end, the moving body is separated from the end of the air supply pipe, so that the end of the air supply pipe is opened. Along with this opening, the head side pressure working chambers of both fluid pressure cylinders communicate with each other. As a result, the fluid is supplied to the head side pressure acting chamber of the other fluid pressure cylinder, and the other moving body starts to move toward the rod side stroke end.
[0015]
Subsequently, a fluid is supplied to one of the head side pressure acting chambers of both fluid pressure cylinders. For example, when the fluid is supplied to the other head side pressure acting chamber, the other moving body starts to move toward the head side stroke end. When the other moving body reaches the vicinity of the head side stroke end, the mechanical valve is opened, and the rod side pressure working chambers of both fluid pressure cylinders are communicated. As a result, the fluid is supplied to one of the rod side pressure acting chambers, and one of the moving bodies starts to move toward the head side stroke end.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of the sequential operation cylinder system 11, and FIGS. 2 to 7 are diagrams schematically showing the operation of the sequential operation cylinder system 11.
[0017]
As shown in FIGS. 1 and 2, the sequential operation cylinder system 11 includes a first air cylinder A1 and a second air cylinder A2 as fluid cylinders. First, the first air cylinder A1 will be described. One end opening of the cylinder tube 12 of the first air cylinder A1 is closed by the head side cover 14, and the other end opening is closed by the rod side cover 15.
[0018]
A first air supply / discharge port 16 is formed in the head side cover 14. The first air supply / discharge port 16 communicates with the internal space of the cylinder tube 12 via the flow path 17. A second air supply / discharge port 18 is formed in the rod side cover 15. The port 18 communicates with the internal space of the cylinder tube 12 through a flow path 19.
[0019]
A first piston 25 is accommodated in the internal space of the cylinder tube 12 so as to be capable of reciprocating along the longitudinal direction of the cylinder tube 12. A piston packing 23 and a wear ring 24 are attached to the outer peripheral surface of the first piston 25. The piston packing 23 seals the peripheral surface of the first piston 25 and the inner peripheral surface of the cylinder tube 12.
[0020]
The internal space of the cylinder tube 12 is partitioned into two pressure action chambers 27 and 28 by the presence of the first piston 25. The head-side pressure working chamber 27 is supplied and discharged with pressurized air as a fluid from the first air supply / discharge port 16. On the other hand, pressurized air is supplied to and discharged from the second air supply / discharge port 18 into the rod-side pressure working chamber 28.
[0021]
A protrusion 25a is formed at the center of the first piston 25, and a first piston rod 26 is screwed into the protrusion 25a. The outer end portion passes through a rod insertion hole 21 formed in the rod side cover 15 and protrudes outside the cylinder tube 12. The first piston rod 26 is slidably supported by the rod side cover 15 via a bush 30 attached to the inner end side peripheral surface of the rod insertion hole 21. An annular rod packing 31 is attached to the inner peripheral surface of the outer end side of the rod insertion hole 21. The rod packing 31 seals the outer peripheral surface of the first piston rod 26 and the inner peripheral surface of the rod insertion hole 21.
[0022]
A third air supply / exhaust port 32 is formed at the center of the outer end surface of the head-side cover 14, and the third air supply / exhaust port 32 and the first air supply / exhaust port 16 communicate with each other via a flow path 33. ing. A check valve 34 is provided on the flow path 33. By the function of the check valve 34, the pressurized air supplied to the first air supply / discharge port 16 is not discharged from the third air supply / discharge port 32 through the flow path 33.
[0023]
The base end portion of the air supply pipe 35 is inserted and fixed at the center of the inner end surface of the head side cover 14, and the air supply pipe 35 extends along the axial direction of the cylinder tube 12, that is, the direction in which the first piston 25 moves. It extends. When the first piston 25 is not located near the rod side stroke end, the air supply pipe 35 penetrates the insertion hole 36 formed in the central portion of the first piston 25. A part of the air supply pipe 35 protruding from the first piston 25 is inserted into the internal space of the first piston rod 26. A packing 37 is provided on the inner peripheral surface of the insertion hole 36, and the seal between the inner peripheral surface of the insertion hole 36 and the outer peripheral surface of the air supply pipe 35 is achieved by the packing 37.
[0024]
More specifically, when the first piston 25 is located in the vicinity of the rod-side stroke end, the front end opening of the air supply pipe 35 is opened. On the other hand, when the first piston 25 is in a position other than the vicinity of the stroke end on the rod side, the front end opening of the air supply pipe 35 is closed by the first piston 25. Therefore, the length of the air supply pipe 35 is set so that the other end of the air supply pipe is closed until the first piston 25 reaches the vicinity of the stroke end on the rod side.
[0025]
Next, the second air cylinder A2 will be described.
As shown in FIGS. 1 and 2, one end opening of the cylinder tube 40 of the second air cylinder A <b> 2 is closed by a head side cover 41, and the other end opening is closed by a rod side cover 42. The rod side cover 42 is formed with a fourth air supply / discharge port 43 and a fifth air supply / discharge port 44. Each air supply / discharge port 43, 44 communicates with the internal space of the cylinder tube 40 via the flow paths 45, 46. A sixth air supply / exhaust port 47 is formed in the head-side cover 41, and this port 47 communicates with the internal space of the cylinder tube 40 via a flow path 48.
[0026]
A second piston 50 is accommodated in the internal space of the cylinder tube 40 so as to be capable of reciprocating along the longitudinal direction of the cylinder tube 40. A piston packing 51 and a wear ring 52 are attached to the outer peripheral surface of the second piston 50. The piston packing 51 seals the outer peripheral surface of the second piston 50 and the inner peripheral surface of the cylinder tube 40.
[0027]
The internal space of the cylinder tube 40 is partitioned into two pressure action chambers 53 and 54 by the presence of the second piston 50. In the head side pressure acting chamber 53, Via the sixth air supply / discharge port 47 Pressurized air is supplied and discharged. On the other hand, in the rod side pressure working chamber 54, Via the fourth air supply / discharge port 43 or the fifth air supply / discharge port 44 Pressurized air is supplied and discharged.
[0028]
A second piston rod 55 is screwed and fixed to the center of the second piston 50. The outer end of the second piston rod 55 passes through a rod insertion hole 56 formed in the rod side cover 42 and protrudes outside the cylinder tube 40. The second piston rod 55 is slidably supported by the rod side cover 42 via a bush 57 mounted on the inner end side peripheral surface of the rod insertion hole 56. An annular rod packing 58 is attached to the outer peripheral surface of the rod insertion hole 56. The rod packing 58 seals the outer peripheral surface of the second piston rod 55 and the inner peripheral surface of the rod insertion hole 56.
[0029]
As shown in FIGS. 1 and 2, the head-side cover 41 is provided with a 2-position 2-port type mechanical valve 60 that opens and closes in response to a change in the position of the second piston 50. The mechanical valve 60 opens and closes the first connection port 60a and the second connection port 60b opened in the head side cover 41. The first port 60 a is connected to the fifth air supply / exhaust port 44 via a communication pipe 62. In the present embodiment, the mechanical valve 60 and the air supply pipe 35 constitute an opening / closing means.
[0030]
The mechanical valve 60 is provided with an operating member 63. The actuating member 63 can appear and disappear in the head side pressure acting chamber 53 of the cylinder tube 40 and can contact the second piston 50. The distal end portion of the operating member 63 protrudes into the head side pressure acting chamber 53 of the cylinder tube 40 by the elastic force of the return spring 64 when not in contact with the second piston 50. When the second piston 50 is located at the stroke end on the head side, the actuating member 63 is pushed out of the head-side pressure acting chamber 53 against the elastic force of the return spring 64, thereby The 1 connection port 60a and the 2nd connection port 60b are connected.
[0031]
Next, a connection circuit between the first air cylinder A1 and the second air cylinder A2 described above will be described.
As shown in FIGS. 1 and 2, the second air supply / discharge port 18 provided in the first air cylinder A1 and the fifth air supply / discharge port 44 provided in the second air cylinder A2 are the second It communicates via an air passage 66 as a flow path. That is, the rod side pressure action chambers 28 and 54 are communicated with each other by the air passage 66. The communication pipe 62 and the mechanical valve 60 that have already been described are disposed on the air passage 66.
[0032]
The third air supply / discharge port 32 provided in the first air cylinder A1 and the sixth air supply / discharge port 47 provided in the second air cylinder A2 communicate with each other via an air passage 67 serving as a first flow path. Has been. The first air supply / discharge port 16 provided in the first air cylinder A1 and the fourth air supply / discharge port 43 provided in the second air cylinder A2 are connected to an air supply path 68 as a fluid supply path. Yes.
[0033]
The air supply path 68 is provided with a 2-position 5-port type switching electromagnetic valve (switching valve) 69. 2 to 4, the pressurized air from the air pressure supply source 71 passes through the first air supply / discharge port 16 by exciting the solenoid 70 provided in the switching electromagnetic valve 69. The air is supplied into the cylinder tube 12 and discharged from the fourth air supply / discharge port 43. On the other hand, as shown in FIGS. 5 to 7, when the solenoid 70 is demagnetized, pressurized air from the air pressure supply source 71 is supplied into the cylinder tube 40 via the head side pressure acting chamber 53. The air is discharged from the first air supply / discharge port 16.
[0034]
A throttle valve 72 is provided on the air passage 66. The throttle valve 72 is provided when the switching solenoid valve 69 is switched before the first piston 25 reaches the rod side stroke end when the moving speed of the first piston 25 of the first air cylinder A1 is slow. This is to ensure that the back pressure remaining in the rod-side pressure acting chamber 28 is released. That is, the throttle valve 72 is provided to prevent the first piston 25 from reaching the rod side stroke end.
[0035]
Next, the operation of the sequential operation cylinder system 11 in the first embodiment configured as described above will be described.
As shown in FIG. 2, the first piston 25 of the first air cylinder A1 and the second piston 50 of the second air cylinder A2 are both positioned at the head side stroke end. That is, both piston rods 26 and 55 are assumed to be immersed. When the solenoid 70 of the switching electromagnetic valve 69 is excited in this state, the pressurized air from the air pressure supply source 71 is supplied to the head side pressure working chamber 27 via the first air supply / discharge port 16 and the flow path 17. The pressure in the head side pressure acting chamber 27 increases. Then, the first piston 25 and the first piston rod 26 begin to move to the rod side (left side in FIG. 2), and the air in the rod-side pressure acting chamber 28 flows into the flow path 19, the second air supply / discharge port 18, the air The air is supplied to the fifth air supply / discharge port 44 of the second air cylinder A2 through the passage 66. Then, the air is discharged to the outside through the flow path 45 and the fourth air supply / discharge port 43.
[0036]
As shown in FIG. 3, when the first piston 25 reaches the vicinity of the rod side stroke end, the front end opening portion of the air supply pipe 35 closed by the first piston 25 is opened. By this opening, the pressurized air in the head side pressure working chamber 27 is supplied to the second air via the air supply pipe 35, the third air supply / discharge port 32, the air passage 67, the sixth air supply / discharge port 47, and the flow path 48. It is supplied to the head side pressure working chamber 53 of the air cylinder A2. Then, the pressure in the head side pressure acting chamber 53 in the second air cylinder A2 increases, and the second piston 50 and the second piston rod 55 begin to move to the rod side stroke end (right side in FIG. 3). Almost simultaneously with the start of the movement, the first piston 25 in the first air cylinder A1 reaches the rod side stroke end.
[0037]
As shown in FIG. 4, when the second piston 50 of the second air cylinder A <b> 2 starts to move, the operating member 63 of the mechanical valve 60 is projected into the head side pressure acting chamber 53 by the elastic force of the return spring 64. As a result, the mechanical valve 60 is closed and air does not flow into the air passage 66. That is, when the second piston 50 moves to the rod side stroke end, the air in the rod side pressure acting chamber 54 is discharged only from the fourth air supply / exhaust port 43 through the flow path 45. Therefore, since the air in the second air cylinder A2 is not supplied to the first air cylinder A1 via the second air supply / discharge port 18, the first piston 25 of the first air cylinder A1 is the head side stroke end. Will never return. In short, in the sequential operation cylinder system 11 of the first embodiment, the second piston rod 55 of the second air cylinder A2 starts to project after the first piston rod 26 of the first air cylinder A1 has almost finished projecting. Works in order.
[0038]
The mechanical valve 60 may be switched before the first piston 25 in the first air cylinder A1 completely reaches the rod side stroke end. In particular, the above may occur when the moving speed of the first piston 25 is slow. In this case, the air in the rod side pressure action chamber 28 is externally passed through the air passage 66, the fifth air supply / discharge port 44, the flow path 46, the rod side pressure action chamber 54, and the fourth air supply / discharge port 43. Discharged. Accordingly, the first piston 25 of the first air cylinder A1 does not stop immediately before reaching the rod side stroke end.
[0039]
In addition, since the throttle valve 72 is provided on the air passage 66, the air discharged from the second air supply / discharge port 18 does not return to the rod-side pressure acting chamber 28 of the first air cylinder A1 again. Accordingly, the first piston 25 and the first piston rod 26 remain held at the head side stroke end.
[0040]
Then, the case where the 1st piston rod 26 and the 2nd piston rod 55 are made to immerse is demonstrated. As shown in FIG. 5, when the switching electromagnetic valve 69 is switched by demagnetization of the solenoid 70, the pressurized air from the air pressure supply source 71 is supplied to the second air cylinder via the fourth air supply / discharge port 43 and the flow path 45. It is supplied into the rod side pressure working chamber 54 of A2. Then, the pressure in the rod side pressure acting chamber 54 increases, and the second piston rod 55 starts to move to the head side (left side in FIG. 5). At the same time, the air in the head-side pressure working chamber 53 in the second air cylinder A 2 passes through the sixth air supply / discharge port 47, the air passage 67, the third air supply / discharge port 32, and the supply pipe 35. It is supplied to the head side pressure working chamber 27 of the cylinder A1. Further, the air is discharged to the outside through the flow path 17 and the first air supply / discharge port 16 of the first air cylinder A1.
[0041]
As shown in FIG. 6, when the second piston 50 reaches the vicinity of the head side stroke end, the operating member 63 is pushed out by the second piston 50, and the mechanical valve 60 is opened. Then, the pressurized air in the rod side pressure working chamber 54 passes through the flow path 46, the fifth air supply / discharge port 44, the air passage 66, the second air supply / discharge port 18, and the flow path 19 to the first air cylinder A1. The rod side pressure working chamber 28 is supplied.
[0042]
As shown in FIG. 7, the first piston 25 and the first piston rod 26 of the first air cylinder A1 start to move toward the head side stroke end. Then, the tip portion of the air supply pipe 35 penetrates the first piston 25 and is further inserted into the internal space of the first piston rod 26. As a result, the front end opening of the air supply pipe 35 is closed by the first piston 25. In short, in the sequential operation cylinder system 11 of the first embodiment, the first piston rod 26 of the first air cylinder A1 starts to be immersed after the second piston rod 55 of the second air cylinder A2 is immersed. To do.
[0043]
The mechanical valve 60 may be switched before the second piston rod 55 in the second air cylinder A2 completely reaches the head side stroke end. In this case, the air in the head side pressure working chamber 53 in the second air cylinder A2 is supplied to the sixth air supply / discharge port 47, the air passage 67, the third air supply / discharge port 32, the flow path 33, the first air supply / discharge. The gas is discharged to the outside through the port 16 and the air supply path 68. Therefore, it does not stop immediately before the second piston rod 55 of the second air cylinder A2 reaches the head side stroke end.
[0044]
In addition, the check valve 34 provided on the flow path 33 does not return the air into the head-side pressure acting chamber 53 of the second air cylinder A2. Accordingly, the second piston 50 and the second piston rod 55 remain held at the head side stroke end.
[0045]
According to this embodiment, the following effects can be obtained.
(1) A plurality of air cylinders A1 and A2 are connected to each other by air passages 66 to 68 constituting a fluid supply path. The air passages 66 to 68 are provided with one switching electromagnetic valve 69, and the direction of the air flowing through the air passages 66 to 68 is switched by the switching electromagnetic valve 69. Therefore, the first piston rod 26 of the first air cylinder A1 and the second piston rod 55 of the second air cylinder A2 are sequentially operated without requiring the switching solenoid valve 69 for each air cylinder A1, A2. be able to. Therefore, the installation man-hour of the switching solenoid valve 69 is reduced, Number of switching solenoid valves 69 Therefore, the manufacturing cost can be reduced.
[0047]
(2) A throttle valve 72 is provided on the air passage 66. Therefore, even if the switching solenoid valve 69 is switched immediately before the first piston 25 reaches the rod-side stroke end, the back pressure remaining in the rod-side pressure working chamber 28 of the first air cylinder A1 can be surely released. it can. Therefore, the first piston 25 can be reliably moved to the rod side stroke end.
[0048]
(3) A flow path 33 is provided between the first air supply / discharge port 16 and the third air supply / discharge port 32, and a check valve 34 is provided on the flow path 33. Therefore, even if the switching solenoid valve 69 is switched immediately before the second piston rod 55 reaches the head side stroke end, the back pressure remaining in the head side pressure acting chamber 53 of the second air cylinder A2 is surely removed. Can do. Therefore, the second piston rod 55 can be reliably moved to the head side stroke end.
[0049]
(Second Embodiment)
As shown in FIG. 8, the second embodiment is different from the first embodiment in that the mechanical valve 60 shown in the first embodiment is not the second air cylinder A2, but the cylinder tube of the first air cylinder A1. 12 is provided.
[0050]
The actuating member 63 provided in the mechanical valve 60 can be brought into and out of the head side pressure acting chamber 27 of the cylinder tube 12 in the first air cylinder A1 and can contact the first piston 25. The distal end portion of the operating member 63 protrudes into the head-side pressure acting chamber 27 of the cylinder tube 12 by the elastic force of the return spring 64 when not in contact with the first piston 25. When the first piston 25 is located at the head-side stroke end, the actuating member 63 is pushed out of the head-side pressure acting chamber 27 against the elastic force of the return spring 64, whereby both rods The side pressure working chambers 28 and 54 are communicated with each other.
[0051]
Further, as a configuration different from the configuration of the first embodiment, the fourth air supply / discharge port 43 is not provided in the cylinder tube 40 of the second air cylinder A2, but is provided in the cylinder tube 12 of the first air cylinder A1. ing. That is, the fourth air supply / discharge port 43 communicates with the rod-side pressure acting chamber 28 of the first air cylinder A1 through the flow path 45. Further, in the first embodiment, the throttle valve 72 is used on the air passage 66, whereas in this embodiment, a check valve 75 is used instead. The role of the check valve 75 is basically the same as that of the throttle valve 72.
[0052]
Further, a step portion 25b is formed on the rod-side end surface of the first piston 25 in the first air cylinder A1. Due to the presence of the step portion 25b, an air passage (see FIG. 9) 22 is formed between the inner wall surface of the cylinder tube 12 and the first piston 25 when the first piston 25 is positioned at the rod side stroke end. Has been. When the first piston 25 is positioned at the rod-side stroke end, the second air supply / discharge port 18 and the fourth air supply / discharge port 43 are communicated with each other via a space formed by the air passage 22. It has become so.
[0053]
The operation of the sequential operation cylinder system 11 in the second embodiment will be described.
As shown in FIG. 8, both the first piston 25 of the first air cylinder A1 and the second piston 50 of the second air cylinder A2 are located at the head side stroke end. When the solenoid 70 of the switching electromagnetic valve 69 is excited in this state, the pressurized air from the air pressure supply source 71 is supplied to the head side pressure working chamber 27 via the first air supply / discharge port 16 and the flow path 17. The pressure in the head side pressure acting chamber 27 increases. Then, the first piston 25 and the first piston rod 26 start to move to the rod side. Along with the movement, the operating member 63 of the mechanical valve 60 is protruded into the head side pressure acting chamber 27 by the elastic force of the return spring 64. As a result, the mechanical valve 60 is closed and air does not flow into the air passage 66. That is, when the first piston 25 moves to the rod-side stroke end, the air in the rod-side pressure working chamber 28 is discharged to the outside through the flow path 45, the fourth air supply / discharge port 43, and the air supply path 68. Is done.
[0054]
As shown in FIG. 9, when the first piston 25 reaches the vicinity of the rod side stroke end, the front end opening of the air supply pipe 35 closed by the first piston 25 is opened. By this opening, the pressurized air in the head side pressure working chamber 27 is supplied to the second air via the air supply pipe 35, the third air supply / discharge port 32, the air passage 67, the sixth air supply / discharge port 47, and the flow path 48. It is supplied to the head side pressure working chamber 53 of the air cylinder A2. Then, the pressure in the head side pressure acting chamber 53 in the second air cylinder A2 increases, and the second piston 50 and the second piston rod 55 begin to move to the rod side stroke end. Almost simultaneously with the start of the movement, the first piston 25 in the first air cylinder A1 reaches the rod side stroke end.
[0055]
As shown in FIG. 10, when the second piston 50 of the second air cylinder A2 starts to move, the air in the rod-side pressure acting chamber 54 in the second air cylinder A2 flows into the flow path 46, the fifth air supply / discharge port. 44, the air passage 66, the check valve 75, the second air supply / discharge port 18, the flow path 19, the air passage 22, the flow path 45, the fourth air supply / discharge port 43, and the air supply path 68 to be discharged to the outside. The In short, in the sequential operation cylinder system 11 of the second embodiment, the second piston rod 55 of the second air cylinder A2 starts to protrude after the protrusion of the first piston rod 26 of the first air cylinder A1 is almost completed. Works in order.
[0056]
Then, the case where the 1st piston rod 26 and the 2nd piston rod 55 are made to immerse is demonstrated. As shown in FIG. 11, when the switching electromagnetic valve 69 is switched by demagnetization of the solenoid 70, the pressurized air from the air pressure supply source 71 is supplied to the first air cylinder via the fourth air supply / discharge port 43 and the flow path 45. It is supplied to the rod side pressure working chamber 28 of A1. Then, the pressure in the rod side pressure acting chamber 28 increases, and the first piston 25 starts to move to the head side. At the same time, the air in the head side pressure working chamber 27 in the first air cylinder A1 is discharged to the outside through the flow path 17, the first air supply / discharge port 16, and the air supply path 68.
[0057]
The air supplied from the fourth air supply / exhaust port 43 to the rod-side pressure working chamber 28 does not flow to the second air cylinder A2 via the air passage 66 by the check valve 75. Therefore, the second piston rod 55 in the second air cylinder A2 does not move during the movement of the first piston 25 in the first air cylinder A1.
[0058]
As shown in FIG. 12, when the first piston 25 reaches the vicinity of the head side stroke end, the operating member 63 is pushed out by the first piston 25, the mechanical valve 60 is opened, and air flows through the air passage 66. . Then, the pressurized air in the rod side pressure working chamber 28 passes through the flow path 19, the second air supply / discharge port 18, the air passage 66, the fifth air supply / discharge port 44, and the flow path 46, and then the second air cylinder A 2. The rod side pressure working chamber 54 is supplied.
[0059]
As shown in FIG. 13, the second piston 50 and the second piston rod 55 of the second air cylinder A2 start to move toward the head side stroke end. Then, the air in the head-side pressure working chamber 53 in the second air cylinder A2 flows into the flow path 48, the sixth air supply / discharge port 47, the air passage 67, the flow path 33, the flow path 17, and the first air supply / discharge port 16. The air is discharged to the outside through the air supply path 68. In short, in the sequential operation cylinder system 11 of the second embodiment, after the first piston rod 26 of the first air cylinder A1 is immersed, the second piston rod 55 of the second air cylinder A2 starts to be immersed. To do.
[0060]
( First reference example )
As shown in FIG. First reference example However, the difference from the first embodiment is that the air supply pipe 35 shown in the first embodiment is omitted. Due to such a difference in configuration, an air passage 67 is connected in the middle of the air supply path 68. In other words, a part of the air supply path 68 and a part of the air passage 67 are shared. On the air passage 67, there is provided a 2-position 2-port type mechanical valve 77 which opens and closes in accordance with the position change of the first piston 25. Book Reference example In this case, the mechanical valve 60, 77 constitutes an opening / closing means.
[0061]
The mechanical valve 77 is provided with an operating member 77a. The actuating member 77a can be moved into and out of the rod-side pressure acting chamber 28 of the cylinder tube 12 in the first air cylinder A1 and can contact the first piston 25. The tip of the actuating member 77a protrudes into the rod-side pressure acting chamber 28 of the cylinder tube 12 by the elastic force of the return spring 77b when not in contact with the first piston 25. When the first piston 25 is located at the rod-side stroke end, the operating member 77a is pushed out of the rod-side pressure acting chamber 28 against the elastic force of the return spring 77b. 67 and the air supply path 68 are communicated with each other.
[0062]
Book Reference example The air passage 67 and the air supply passage 68 are connected to the flow passage 33 having the check valve 34. Furthermore, in the first embodiment, a throttle valve 72 is used in the air passage 66, whereas Reference example Instead, a check valve 75 is used.
[0063]
First reference example The operation of the sequential operation cylinder system 11 will be described.
As shown in FIG. 14, the first piston 25 of the first air cylinder A1 and the second piston 50 of the second air cylinder A2 are both located at the head side stroke end. In this state, when pressurized air from the air pressure supply source 71 is supplied to the head-side pressure acting chamber 27, the first piston 25 and the first piston rod 26 begin to move to the rod side. Along with this movement, the air in the rod side pressure working chamber 28 in the first air cylinder A1 flows into the flow path 19, the second air supply / discharge port 18, the air passage 66, the fifth air supply / discharge port 44, the flow path 46, It is supplied into the rod side pressure acting chamber 54 of the second air cylinder A2.
[0064]
As shown in FIG. 15, when the first piston 25 reaches the vicinity of the rod-side stroke end, the operating member 77a is pushed out by the first piston 25, and the mechanical valve 77 is opened. That is, a part of the air supply path 68 and the air passage 67 communicate with each other. Then, the pressurized air supplied from the air pressure supply source 71 is supplied into the head side pressure working chamber 53 via the sixth air supply / discharge port 47 and the flow path 48. Then, the pressure in the head side pressure acting chamber 53 in the second air cylinder A2 increases, and the second piston 50 and the second piston rod 55 begin to move to the rod side stroke end. Almost simultaneously with the start of the movement, the first piston 25 in the first air cylinder A1 reaches the rod side stroke end.
[0065]
As shown in FIG. 16, when the second piston 50 of the second air cylinder A <b> 2 starts to move, the operating member 63 of the mechanical valve 60 is protruded into the head side pressure acting chamber 53 by the elastic force of the return spring 64. As a result, the mechanical valve 60 is closed and air does not flow into the air passage 66. Therefore, the air in the rod side pressure working chamber 54 of the second air cylinder A2 is discharged to the outside through the flow path 45, the fourth air supply / discharge port 43, and the air supply path 68. in short, First reference example In the sequential operation cylinder system 11, the second piston rod 55 of the second air cylinder A2 starts to project after the first piston rod 26 of the first air cylinder A1 has almost finished projecting.
[0066]
Then, the case where the 1st piston rod 26 and the 2nd piston rod 55 are made to immerse is demonstrated. As shown in FIG. 17, by switching the switching electromagnetic valve 69, the pressurized air from the air pressure supply source 71 is supplied into the rod side pressure working chamber 54 of the second air cylinder A2. Then, the second piston rod 55 starts to move to the head side (left side in FIG. 5). At the same time, the air in the head-side pressure acting chamber 53 in the second air cylinder A 2 is discharged to the outside through the air passage 67 and the air supply passage 68.
[0067]
As shown in FIG. 18, when the second piston 50 reaches the vicinity of the head side stroke end, the mechanical valve 60 is opened and air flows into the air passage 66, so that the pressurized air in the rod side pressure working chamber 54 is increased. Is supplied into the rod-side pressure acting chamber 28 of the first air cylinder A1.
[0068]
As shown in FIG. 19, the first piston 25 and the first piston rod 26 of the first air cylinder A1 start to move toward the head side stroke end. Then, the mechanical valve 77 is closed, and the air passage 67 and the air supply passage 68 are not communicated. Therefore, the air in the head-side pressure acting chamber 27 of the first air cylinder A1 is discharged to the outside through the air supply path 68 as the first piston 25 moves. in short, First reference example In the sequential operation cylinder system 11, the first piston rod 26 of the first air cylinder A1 starts to be immersed after the second piston rod 55 of the second air cylinder A2 is immersed.
[0069]
( Third Embodiment)
As shown in FIG. Third The embodiment differs greatly from the first embodiment in that the mechanical valve 60 shown in the first embodiment is omitted. Therefore, in the present embodiment, the opening / closing means is constituted only by the air supply pipe 35.
[0070]
Further, as a configuration different from the configuration of the first embodiment, the fourth air supply / discharge port 43 is not provided in the cylinder tube 40 of the second air cylinder A2, but is provided in the cylinder tube 12 of the first air cylinder A1. ing. That is, the fourth air supply / discharge port 43 communicates with the rod-side pressure acting chamber 28 of the first air cylinder A1 through the flow path 45. Furthermore, in the first embodiment, a throttle valve 72 is used on the air passage 66, but this is omitted in this embodiment.
[0071]
In this embodiment, the step portion 25b described in the second embodiment is formed on the end face of the first piston 25, and the air passage 22 is formed by the step portion 25b when the first piston 25 is at the rod side stroke end. It is supposed to be formed.
[0072]
Third The operation of the sequential operation cylinder system 11 in the embodiment will be described.
As shown in FIG. 20, the first piston 25 of the first air cylinder A1 and the second piston 50 of the second air cylinder A2 are both located at the head side stroke end. In this state, when pressurized air from the air pressure supply source 71 is supplied to the head-side pressure acting chamber 27 of the first air cylinder A1, the first piston 25 and the first piston rod 26 begin to move to the rod side. . At the same time, the air in the rod side pressure working chamber 28 is discharged to the outside through the fourth air supply / discharge port 43 and the air supply path 68.
[0073]
As shown in FIG. 21, when the first piston 25 reaches the vicinity of the rod-side stroke end, the tip opening of the air supply pipe 35 that has been closed by the first piston 25 is opened. By this opening, the pressurized air in the head side pressure working chamber 27 is supplied to the head side pressure working chamber 53 of the second air cylinder A <b> 2 via the air passage 67. Then, the 2nd piston 50 and the 2nd piston rod 55 begin to move to the rod side stroke end. Almost simultaneously with the start of the movement, the first piston 25 in the first air cylinder A1 reaches the rod side stroke end.
[0074]
As shown in FIG. 22, when the second piston 50 of the second air cylinder A2 starts to move, the air in the rod-side pressure acting chamber 54 in the second air cylinder A2 flows into the flow path 46, the fifth air supply / discharge port. 44, the air passage 66, the second air supply / discharge port 18, and the flow path 19 are supplied into the rod-side pressure working chamber 28 of the first air cylinder A1.
Further, the air is discharged to the outside through the air passage 22, the flow path 45, the fourth air supply / discharge port 43, and the air supply path 68. in short, Third In the sequential operation cylinder system 11 of the embodiment, after the first piston rod 26 of the first air cylinder A1 is almost completely projected, the second piston rod 55 of the second air cylinder A2 starts to project. .
[0075]
Then, the case where the 1st piston rod 26 and the 2nd piston rod 55 are made to immerse is demonstrated. As shown in FIGS. 23 and 24, when the switching electromagnetic valve 69 is switched, the pressurized air from the air pressure supply source 71 is supplied to the rod of the first air cylinder A1 via the fourth air supply / discharge port 43 and the flow path 45. It is supplied to the side pressure working chamber 28. Further, the air is also supplied to the rod side pressure working chamber 54 of the second air cylinder A2 through the flow path 19, the second air supply / discharge port 18, the air passage 66, the fifth air supply / discharge port 44, and the flow path 46. Is done.
[0076]
Then, the first piston 25 and the second piston 50 start to move simultaneously toward the head side. Along with these movements, the air in the head side pressure working chamber 27 in the first air cylinder A1 is discharged to the outside through the flow path 17, the first air supply / discharge port 16, and the air supply path 68. The air in the head side pressure working chamber 53 in the second air cylinder A2 is the sixth air supply / discharge port 47, the air passage 67, the port 32, the check valve 34, the flow path 33, the flow path 17 and the first air. It is discharged to the outside through the supply / discharge port 16 and the air supply path 68. As a result, as shown in FIG. Third In the sequential operation cylinder system 11 of the embodiment, the immersion of both piston rods 26 and 55 of the first and second air cylinders A1 and A2 starts simultaneously, and both piston rods 26 and 55 reach the head side stroke end simultaneously.
[0077]
Therefore, according to the sequential operation cylinder system 11 of this embodiment, since the mechanical valve is not used, the whole structure can be simplified and the manufacturing cost can be further reduced.
[0078]
( Second reference example )
As shown in FIG. Reference example The sequential operation cylinder system 11 includes three air cylinders A1 to A3. The first air cylinder A1 has the same configuration as the first air cylinder A1 shown in the first embodiment.
[0079]
For the second air cylinder A2, First reference example This is basically the same configuration as the second air cylinder A2 described above. First reference example The difference is that the fourth air supply / exhaust port 43 communicates with the head-side pressure acting chamber 53 via the flow path 45. A flow path 78 communicating with both flow paths 45 and 48 is formed, and a check valve 79 is provided on the flow path.
[0080]
or, First reference example The difference is that the air supply pipe 35 is provided in the second air cylinder A2. When the second piston 50 is positioned near the stroke end on the rod side, the tip opening of the air supply pipe 35 is opened. On the other hand, when the second piston 50 is not positioned in the vicinity of the stroke end on the rod side, the front end opening of the air supply pipe 35 is closed by the first piston 25.
[0081]
About the 3rd air cylinder A3, the 3rd piston 81 and the 3rd piston rod 82 which can reciprocate are accommodated in the cylinder tube 80 so that reciprocation is possible. The internal space of the cylinder tube 80 is partitioned by a third piston 81 from a head side pressure acting chamber 83 and a rod side pressure acting chamber 84. A third piston rod 82 is integrally fixed to the end surface of the third piston 81. As the third piston 81 moves, the third piston rod 82 can protrude and retract from the cylinder tube 80.
[0082]
The cylinder tube 80 is formed with a seventh air supply / discharge port 85 and an eighth air supply / discharge port 86. The seventh air supply / discharge port 85 communicates with the head-side pressure acting chamber 83 via the flow path 87. The eighth air supply / discharge port 86 communicates with the rod-side pressure acting chamber 84 via a flow path 88.
[0083]
The cylinder tube 80 is provided with a 2-position 2-port type mechanical valve 89 that opens and closes when the position of the third piston 81 changes.
When the operating member 89 a provided in the mechanical valve 89 is pushed by the third piston 81, the mechanical valve 89 is opened. On the other hand, when the third piston 81 is separated from the operating member 89a, the elastic force of the elastic spring 89b provided in the mechanical valve 89 works, and the mechanical valve 89 is closed. Book Reference example In this case, the two air supply pipes 35 and the two mechanical valves 60 and 89 constitute an opening / closing means.
[0084]
The connection relationship between the air cylinders A1 to A3 described above will be described.
One end of the air supply path 68 provided with the switching electromagnetic valve 69 is connected to the first air supply / discharge port 16 of the first air cylinder A1, and the other end is the eighth air supply / discharge port 86 of the third air cylinder A3. It is connected to the.
[0085]
The third air supply / discharge port 32 of the first air cylinder A1 and the fourth air supply / discharge port 43 of the second air cylinder A2 are connected via an air passage 67. Therefore, the head side pressure working chamber 27 of the first air cylinder A1 and the head side pressure working chamber 53 of the second air cylinder A2 are communicated by the air passage 67. Further, the sixth air supply / discharge port 47 of the second air cylinder A 2 and the seventh air supply / discharge port 85 of the head side pressure working chamber 83 are connected via an air passage 90. Therefore, the head side pressure working chamber 53 of the second air cylinder A2 and the head side pressure working chamber 83 of the third air cylinder A3 are communicated by the air passage 90. Therefore, the book Reference example Then, the first flow path is constituted by both the air passages 67 and 90.
[0086]
The second air supply / discharge port 18 of the first air cylinder A1, the fifth air supply / discharge port 44 of the second air cylinder A2, and the eighth air supply / discharge port 86 of the third air cylinder A3 are the second flow path. Are connected through an air supply path 66. Therefore, the rod side pressure working chamber 28 of the first air cylinder A1, the rod side pressure working chamber 54 of the second air cylinder A2, and the rod side pressure working chamber 84 of the third air cylinder A3 are communicated by the air passage 66. ing. Book Reference example Then, a part of the air passage 66 and a part of the air supply path 68 are shared.
[0087]
Then configured as above Second reference example The operation of the sequential operation cylinder system 11 will be described.
The pistons 25, 55 and 82 of the air cylinders A1 to A3 are all located at the head side stroke end. In this state, when pressurized air from the air pressure supply source 71 is supplied to the head side pressure working chamber 27 of the first air cylinder A1 via the first air supply / discharge port 16 and the flow path 17, the first piston 25 moves toward the rod side stroke end. At this time, the air in the rod side pressure working chamber 28 in the first air cylinder A1 is discharged to the outside through the flow path 19, the second air supply / discharge port 18, and the air supply path 68.
[0088]
When the first piston 25 reaches the vicinity of the rod side stroke end, the tip opening of the air supply pipe 35 is opened, and the pressurized air in the head side pressure working chamber 27 is supplied to the third air supply / discharge port 32 and the air passage 67. Then, the air is supplied to the head-side pressure acting chamber 53 of the second air cylinder A2 through the fourth air supply / discharge port 43 and the flow path 45. Then, the 2nd piston 50 and the 2nd piston rod 55 begin to move to the rod side stroke end. Almost simultaneously with the start of the movement, the first piston 25 in the first air cylinder A1 reaches the rod side stroke end.
[0089]
When the second piston 50 of the second air cylinder A2 starts to move, the mechanical valve 60 is closed, and the air in the rod side pressure working chamber 54 of the second air cylinder A2 flows into the flow path 46, the fifth air supply / discharge port. 44, a part of the air passage 66 and the air supply passage 68 are discharged to the outside. Accordingly, the first piston 25 of the first air cylinder A1 is held at the head side stroke end.
[0090]
When the second piston 50 reaches the vicinity of the rod side stroke end, the tip opening of the air supply pipe 35 is opened, and the pressurized air in the head side pressure working chamber 53 flows through the flow path 48 and the sixth air supply / discharge port 47. Then, the air is supplied to the head side pressure working chamber 83 of the third air cylinder A3 through the air passage 90, the seventh air supply / discharge port 85, and the flow path 87. Then, the third piston 81 starts to move to the rod side stroke end. Almost simultaneously with the start of this movement, the second piston 50 in the second air cylinder A2 reaches the rod side stroke end.
[0091]
When the third piston 81 of the third air cylinder A3 starts to move, the mechanical valve 89 is closed. Therefore, due to the movement of the third piston 81, the air in the rod side pressure working chamber 84 of the third air cylinder A3 is not supplied to the rod side pressure working chamber 54 of the second air cylinder A2. That is, the air in the rod side pressure working chamber 54 is discharged to the outside through the flow path 88, the eighth air supply / discharge port 86, and the air supply path 68. Accordingly, the first piston 25 of the first air cylinder A1 is held at the head side stroke end.
[0092]
in short, Second reference example In the sequential operation cylinder system 11, the second piston rod 55 of the second air cylinder A2 starts to project after the first piston rod 26 of the first air cylinder A1 has almost finished projecting. Furthermore, after the protrusion of the second piston rod 55 is almost completed, the third piston rod 82 of the third air cylinder A3 starts to protrude.
[0093]
Then, the case where the 1st piston rod 26 and the 2nd piston rod 55 are made to immerse is demonstrated. When the switching electromagnetic valve 69 is switched, the air from the air pressure supply source 71 is supplied into the rod side pressure working chamber 84 of the third air cylinder A3. Then, the third piston 81 starts to move toward the head side, and the air in the head-side pressure acting chamber 83 in the third air cylinder A3 flows through the air passage 90, the second air cylinder A2, the air passage 67, and the first air cylinder. A1 is discharged to the outside through the air supply path 68.
[0094]
When the third piston 81 reaches the vicinity of the head side stroke end, the mechanical valve 89 is opened, and the pressurized air of the air pressure supply source 71 is supplied from the air supply path 68, a part of the air path 66, and the fifth air supply / discharge port. 44, and supplied to the rod side pressure working chamber 54 of the second air cylinder A2 via the flow path 46. Then, the second piston 50 of the second air cylinder A2 starts to move toward the head side stroke end. At this time, the air in the head side pressure working chamber 53 in the second air cylinder A2 is discharged to the outside through the air passage 67, the first air cylinder A1, and the air supply path 68.
[0095]
When the second piston 50 reaches the vicinity of the head side stroke end, the mechanical valve 60 is opened, and the pressurized air of the air pressure supply source 71 is supplied to the air supply path 68, the air path 66, the second air supply / discharge port 18, the flow. The air is supplied into the rod-side pressure acting chamber 28 of the first air cylinder A1 through the passage 19. Then, the first piston 25 of the first air cylinder A1 starts to move toward the head side stroke end. At this time, the air in the head side pressure working chamber 27 in the first air cylinder A1 is discharged to the outside through the air supply path 68.
[0096]
in short, Second reference example In the sequential operation cylinder system 11, the second piston rod 55 of the second air cylinder A2 starts to be immersed after the third piston rod 82 of the third air cylinder A3 is almost completely projected. Furthermore, after the immersion of the second piston rod 55 is almost completed, the first piston rod 26 of the first air cylinder A1 starts to be immersed.
[0097]
In addition, you may change embodiment of this invention as follows.
As another example of the first embodiment, a check valve may be used instead of the throttle valve 72 provided on the air passage 66.
[0098]
As another example of the first embodiment, a throttle valve may be used instead of the check valve 34 provided on the flow path 33 between the first air supply / discharge port 16 and the third air supply / discharge port 32. Good.
[0099]
As another example of the second embodiment, the step portion 25b provided on the end surface of the first piston 25 may be omitted. When this configuration is adopted, the length of the air supply pipe 35 in the axial direction is shortened. According to this structure, when the 1st piston 25 of 1st air cylinder A1 moves toward the rod side stroke end, the front-end | tip part of the air supply pipe 35 is open | released quickly. With such a configuration, the air from the second air cylinder A2 discharged when the second piston 50 moves can be discharged smoothly from between the first piston 25 and the cylinder tube 12 to the outside. it can.
[0100]
Next In addition to the technical idea described in the claims, the technical idea grasped by the above-described embodiment will be described below.
[0101]
(1) Two fluid pressure cylinders having a movable body that can reciprocate in the cylinder tube and in which the inner space of the cylinder tube is partitioned into a head side pressure acting chamber and a rod side pressure acting chamber. In a sequential operation cylinder system in which each moving body provided in each fluid pressure cylinder is sequentially moved at a predetermined timing by supplying a fluid to each head side pressure action chamber or each rod side pressure action chamber. A fluid supply path for supplying fluid to the fluid pressure cylinder, a switching valve for switching the fluid supply direction is provided in the fluid supply path, and the head side pressure working chamber of each fluid pressure cylinder is defined by the first flow path. In addition to communicating with each other, the rod side pressure working chambers are communicated with each other by the second flow path, and the moving body has a stroke end in either one of the both flow paths. Provided with a mechanical valve that mechanically opens and closes the flow path when moved in the vicinity, and can be inserted into the moving body provided in the other fluid pressure cylinder in the head-side pressure action chamber of the other fluid pressure cylinder. An air pipe is provided, and the length of the air supply pipe is set such that the moving body is detached from the end of the air supply pipe when the moving body moves near the rod side stroke end. Sequentially operating cylinder system.
[0102]
【The invention's effect】
As described above in detail, according to the present invention, by reducing the number of switching valves, it is possible to provide a sequential operation cylinder system having a low cost and a simple structure.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a sequential operation cylinder system according to a first embodiment.
FIG. 2 is a circuit diagram showing an operation of a sequential operation cylinder system.
FIG. 3 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 2;
4 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 3. FIG.
FIG. 5 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 4;
6 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 5. FIG.
7 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 6. FIG.
FIG. 8 is a circuit diagram showing the operation of the sequential operation cylinder system in the second embodiment.
FIG. 9 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 8;
FIG. 10 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 9;
FIG. 11 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 10;
12 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 11. FIG.
FIG. 13 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 12;
FIG. 14 First reference example The circuit diagram which shows operation | movement of the sequential operation cylinder system in FIG.
FIG. 15 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 14;
FIG. 16 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 15;
FIG. 17 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 16;
FIG. 18 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 17;
FIG. 19 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 18;
FIG. 20 Third A circuit diagram showing operation of a sequential operation cylinder system in an embodiment.
FIG. 21 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 20;
FIG. 22 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 21;
FIG. 23 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 22;
24 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 23. FIG.
FIG. 25 is a circuit diagram showing the operation of the sequential operation cylinder system following FIG. 24;
FIG. 26 Second reference example The circuit diagram of the sequential operation cylinder system in FIG.
[Explanation of symbols]
A1 ... first air cylinder (fluid pressure cylinder), A2 ... second air cylinder (fluid pressure cylinder), A3 ... third air cylinder (fluid pressure cylinder), 11 ... sequentially operating cylinder system, 12 ... cylinder tube, 25 ... 1st piston, 26 ... 1st piston rod, 35 ... Supply pipe (opening / closing means), 40 ... Cylinder tube, 50 ... 2nd piston, 55 ... 2nd piston rod, 60 ... Mechanical valve (opening / closing means), 66 ... Air passage (second Flow path , 67 ... Air passage (first flow path), 68 ... Air supply path (fluid supply path), 69 ... Switching solenoid valve (switching valve), 77 ... Mechanical valve (opening / closing means), 81 ... Third piston, 82 ... 3rd piston rod, 80 ... Cylinder tube, 89 ... Mechanical valve (opening / closing means), 90 ... Air passage (first flow path).

Claims (2)

As well as have a reciprocally movable mobile in the cylinder tube, provided the cylinder tube by the movable body two fluid pressure cylinder which is divided into a head-side pressure action chamber and the rod-side pressure action chamber, wherein the head by supplying fluid to the side pressure action chamber or the rod-side pressure action chamber, the sequential operation cylinder system the moving body provided in the two fluid pressure cylinder so as to successively move at a predetermined timing,
Comprising a fluid supply passage for supplying fluid to at least one of the fluid pressure cylinder of said two hydraulic cylinders,
It said fluid supply passage is provided with a switching valve for switching the supply direction of the flow body,
The head-side pressure action chamber of the two fluid pressure cylinders, while being communicated with each other by a first flow path, the rod-side pressure action chamber of the two hydraulic cylinders are communicated with each other by a second flow path,
When the moving body provided on one of the two hydraulic cylinders are moved to a predetermined position, mechanically opening and closing the at least one of said first flow path and the second flow path Open and close means,
The opening / closing means includes an air supply pipe disposed in the head side pressure working chamber of either one of the two fluid pressure cylinders,
The air supply pipe extends along the moving direction of the moving body and can be inserted into the moving body,
The length of the air supply pipe is set so that the moving body is detached from the end of the air supply pipe when the moving body moves near the rod side stroke end. Operating cylinder system. The opening / closing means includes a mechanical valve provided in the second flow path,
The mechanical valve is configured such that when the moving body provided in any one of the two fluid pressure cylinders moves near a stroke end, the mechanical valve is brought into contact with either one of the moving bodies. The sequential operation cylinder system according to claim 1, wherein the two flow paths are mechanically opened and closed .

Images