JPH0579150U - Pressure control device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is a pressure control device that sets and holds the air pressure of each pneumatic tank connected to each of a plurality of knockout devices provided in a transfer press to a set pressure that is set individually. For space saving. [Structure] Each base 2A, ...
.., 21G are stacked and arranged on 2G.
, 21G are operated by energizing / de-energizing the solenoid valve drive device 3 to operate the pneumatic tanks 9A ,.
The air pressure of 9 G is set and held at the set pressure individually set by the control command device 49. The supply passage P1 of the manifold 1 and the single air pressure source P may be connected by a single pipe 18, and the solenoid valve drive device 3 is connected to the signal line 50 from the control command device 49 and the voltage source 51. It suffices to electrically connect the electric wirings 52A and 52B, and the space for piping and wiring can be saved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is designed to set and maintain the air pressure of compressed air using parts such as pneumatic cylinders and pneumatic tanks that are respectively connected to a plurality of die cushion devices and knockout devices equipped in a transfer press. Regarding the control device.

[0002]

[Prior Art]

 Conventionally, this type of pressure control device has been shown in FIG. 6 in which pneumatic tanks 89A, 89B connected to pneumatic cylinders 88A, 88B, 88C, 88D, 88E installed in a plurality of die cushion devices and knockout devices, The air pressure of 89C, 89D, 89E is detected by the pressure detection sensors 90A, 90B, 90C, 90D, 90E connected to the pneumatic tanks 89A, ..., 89E, and the detected detection signals are detected by the controllers 91A, 91B. , 91C, 91D, 91E, and when the air pressure of each pneumatic tank 89A, ..., 89E is the set pressure individually set by each controller 91A, ..., 91E, each pneumatic tank 89A ,. , 89E connected to the electromagnetic switching valves 92A, 92B, 92C, 92D, 92E are in the neutral position, and the output holes 93A are connected to the respective pneumatic tanks 89A, ... 89E. , And the exhaust holes 94A, which are open to the atmosphere, are closed by exhaust valve bodies 95A, ..., And the supply valve body 97A, between the compressed air supply holes 96A, ... and the output holes 93A ,. Closed by ...

From the state of FIG. 6, for example, when the air pressure of the pneumatic tank 89A becomes lower than the set pressure of the controller 91A, the controller 91A energizes the first pilot valve 98A of the electromagnetic switching valve 92A to supply the air. The valve body 97A opens the space between the supply hole 96A and the output hole 93A to supply compressed air to the pneumatic tank 89A. When the air pressure in the pneumatic tank 89A rises to the set pressure, the controller 91A deenergizes the first pilot valve 98A of the electromagnetic switching valve 92A, and the supply valve body 97A connects the supply hole 96A and the output hole 93A. The space is closed and the air pressure in the pneumatic tank 89A is set and maintained at the set pressure. When the air pressure of the pneumatic tank 89A becomes higher than the set pressure, the controller 91A energizes the second pilot valve 99A of the electromagnetic switching valve 92A, and the exhaust valve body 95A connects the output hole 93A and the exhaust hole 94A. The space is opened and the compressed air in the pneumatic tank 89A is exhausted to the exhaust hole 94A. Then, when the air pressure in the pneumatic tank 89A drops to the set pressure, the second pilot valve 99A of the electromagnetic switching valve 92A is de-energized by the controller 91A, and the exhaust valve body 95A is placed between the output hole 93A and the exhaust hole 94A. Is closed and the air pressure in the pneumatic tank 89A is set and maintained at the set pressure.

Further, the air pressures of the pneumatic tanks 89B, 89C, 89D and 89E other than the pneumatic tank 89A are also set to the set pressures individually set by the respective controllers 91B, 91C, 91D and 91E as described above. The electromagnetic switching valves 92B, 92C, 92D, 92E are operated and operated to set and hold them.

[0005]

[Problems to be solved by the device]

 However, in the configuration of the pressure control device, the electromagnetic switching valves 92A, ..., 92E are individually installed near the die cushion device and the knockout device, and the supply holes 96A of the electromagnetic switching valves 92A ,. , And the single air pressure source P must be branched and connected by a pipe, which requires a large piping space, and each controller 91A for operating and operating each electromagnetic switching valve 92A, ... 92E. , 91E and each electromagnetic switching valve 92A, ..., 92E must be electrically connected by a plurality of electric wirings, respectively, which requires a large wiring space, and a large piping and wiring space increase the size of the entire apparatus. There was a problem that caused it. The present invention solves such a problem, and the space saving of the piping is achieved by the manifold, and the space saving of the wiring is achieved by the serial transmission of the control signal, so that the whole device can be made compact. It provides a control device.

[0006]

[Means for Solving the Problems]

 Therefore, in the present invention, the supply hole and the exhaust hole for the compressed air are formed so as to open through both side surfaces facing each other, and the supply hole and the exhaust hole are formed at one side surface substantially orthogonal to the both side surfaces opening. Compressed air formed from each supply hole inside by constructing a base with an output hole connected to the compressed air use part and a plurality of bases sequentially connected so that each supply hole and each exhaust hole are connected Compressed air that is connected to the output holes by stacking a manifold that has a supply passage that supplies air and an exhaust passage that is open to the atmosphere and that is formed from each exhaust hole, and the bases that make up the manifold The first switching position that supplies the compressed air in the supply passage to the output hole when the air pressure in the used part is lower than the set pressure, and the compressed air in the output hole is exhausted when the air pressure in the compressed air used part is higher than the set pressure. Second switching position to exhaust to passage Also, an electromagnetic switching valve that has a neutral position that closes the output hole when the air pressure of the compressed air use part is at the set pressure, and a parallel control signal by converting the serial control signal into a parallel control signal by arranging in the manifold. A solenoid valve drive device for operating each electromagnetic switching valve by energizing and de-energizing it based on a control signal.

[0007]

[Action]

 In the configuration of the present invention, by connecting the supply passage of the manifold and the single air pressure source by piping, the electromagnetic switching valves laminated on each base constituting the manifold are connected via the supply passage. Can be connected to a single pneumatic source. Also, by electrically connecting the signal line from the control command device that outputs a serial control signal to the solenoid valve drive device located in the manifold and the electrical wiring from the voltage source, each solenoid directional control valve is energized individually. It can be operated without electricity. Therefore, it is sufficient to connect the manifold supply passage and a single air pressure source to a plurality of solenoid directional control valves through a single pipe, and to the solenoid valve drive device the signal line and voltage source from the control command device. It is only necessary to electrically connect the electric wiring from the solenoid valve to a single pneumatic pressure source by branching the supply holes of each solenoid switching valve according to the number of multiple solenoid switching valves as in the conventional device. Compared to a system in which each solenoid directional control valve and each controller installed corresponding to it have to be electrically connected by a plurality of electrical wirings, the space required for piping and wiring can be saved, and the entire device is compact. Can be

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 1 denotes a manifold, which includes seven bases 2A, 2B, 2C, 2D, 2E, 2F, 2G, a mounting table 4 on which a solenoid valve driving device 3 is mounted, and a manifold 7. The side plate members 5A and 5B forming both ends are sequentially connected by bolt members 6A and 6B. 2G is formed so that the compressed air supply holes 7A, ..., 7G and the exhaust holes 8A ,. Output holes 10A, 10B, 10C, 10D, 10E, 10F and 10G are formed which are opened on the side surface and are connected to the pneumatic tanks 9A, 9B, 9C, 9D, 9E, 9F and 9G. Each of the pneumatic tanks 9A, ..., 9G is connected to seven knockout devices provided in the transfer press via pneumatic cylinders 11A, 11B, 11C, 11D, 11E, 11F, 11G. The mounting table 4 is formed by penetrating the supply holes 7A and the exhaust holes 8A of the base 2A through the supply holes 12 communicating with the exhaust holes 8A and the exhaust holes 13 on both side surfaces facing each other. A supply hole 14 and an exhaust hole 15 which communicate with the hole 12 and the exhaust hole 13 are opened to both sides facing each other to form a through hole, and the side plate member 5B communicates with the supply hole 7G and the exhaust hole 8G of the base 2G. The supply hole 16 and the exhaust hole 17 are formed so as to open on both side surfaces facing each other. In the manifold 1, one end of the supply hole 16 is closed, and the supply hole 14 is connected to a single air pressure source P by a pipe 18 and is internally formed by each of the supply holes 7A, ..., 7G, 12, 14, 16. Then, the supply passage P1 for supplying compressed air is provided so as to extend, and one end of the exhaust hole 15 is closed to connect a silencer 19 to the exhaust hole 17 so that the exhaust holes 8A, ... An exhaust passage E1 is formed by extending the exhaust passage E1, which is open to the atmosphere.

2G are provided with check valves 20A, 20B, 20C, 20D, 20E, 20F, 20G and electromagnetic switching valves 21A, 21B, 21C, 21D, 21E, 21F, 21G on the bases 2A, ... , 2G are provided in a stacked arrangement, and branch supply holes 22A, ..., 22G branch-connected to the supply passage P1 and branch exhaust holes 23A branch-connected to the exhaust passage E1 are provided on the stacking arrangement surface of each of the bases 2A ,. , 23G and the other ends of the output holes 10A, ..., 10G each having one end opened on one side surface. 20G is connected to each of the branch supply holes 22A, ..., 22G, and each of the check valves 20A, ..., 20G is connected to a corresponding one of the supply paths 24A, ..., 24G, and each of the branch exhaust holes 23A ,. , 25G and output paths 26A, ..., 26G communicating with the output holes 10A ,. As shown in detail in FIG. 2, each of the check valves 20A, ... Has a supply passage 24A, ... A first supply passage 27A, whose one end is opened to the base 2A, ... A second supply passage 28A, ... One end of which is opened on the laminated surface on the side of the valves 21A, ..., and a check valve body 29A between the first supply passage 27A ,. , Are provided to allow the flow from the first supply path 27A, ... Side to the second supply path 28A, ... side and block the flow in the opposite direction.

, 21G are connected to the supply passages 24A, ..., 24G of the check valves 20A, ..., 20G, and the exhaust passages 25A ,. , 31G communicating with 5G and output passages 32A, ..., 32G communicating with the output passages 26A, ..., 26G are formed by opening in the stacking surface. As shown in detail in FIG. 2, each electromagnetic switching valve 21A, ... Has a supply valve body 33A, ... And an output passage 32A, .. which internally cut off communication between the supply passages 30A ,. Has an exhaust valve element 34A, which cuts off communication between the exhaust valve 31A, and the exhaust passage 31A, and the supply valve element 33A, ... Is operated by the first pilot valve 35A ,. Is provided so as to be axially movable by supplying pilot compressed air to the working chamber 36A, exhausting pilot compressed air from the working chamber 36A, and the exhaust valve elements 34A, ... Are energized by the second pilot valves 37A ,. The pilot compressed air is supplied to the working chambers 38A, ... And the pilot compressed air is exhausted from the working chambers 38A ,. 39A, ... are springs for urging the supply valve bodies 33A, ... In the shut-off direction, and 40A, ... are springs for urging the exhaust valve bodies 34A ,.

The first pilot valves 35A, ..., 35G and the second pilot valves 37A, ..., 37G of the electromagnetic switching valves 21A, ..., 21G have three electric wirings 41A, 42A, 43A, ..., 41G, 42G. , 43 are respectively inserted into the check valves 20A, ..., 20G, and electrically connected to the connectors 44A, .. Each of the connectors 44A, ... Has three electric wires 45A, 46A, 47A, ..., 45G, 46G, 47G attached to the other side opposite to the one side where the output hole 10A of each base 2A ,. The wiring cover members 48 </ b> A, ... And the mounting table 4 are inserted and electrically connected to the solenoid valve driving device 3. The solenoid valve driving device 3 is a slave station for serial transmission and electrically connects the signal line 50 from the control command device 49 that outputs a serial control signal and the electrical wirings 52A and 52B from the voltage source 51. It is provided. The control command device 49 is a master station for serial transmission, and mainly includes a microprocessor, memory, transmission / reception circuit, etc. (not shown), and pressure detection sensors 53A, 53B connected to the pneumatic tanks 9A, ..., 9G, respectively. Input the detection signals from 53C, 53D, 53E, 53F, and 53G, and compare with the set pressure set individually for each pneumatic tank 9A, ..., 9G, and energize each electromagnetic switching valve 21A ,. It has a function of outputting a serial control signal for deenergizing to the solenoid valve driving device 3 via the signal line 50. The solenoid valve drive device 3 has a function of converting a serial control signal from the control command device 49 into a parallel control signal, and based on the parallel control signal, the electric wires 45A, 46A, 47A, ..., 45G, , 35G and the second pilot valves 37A, ..., 37G of the electromagnetic switching valves 21A, ..., 21G via the 41G, 47A, 41A, 42A, 43A ,. Energized and de-energized, each electromagnetic switching valve 21A, ..., 21G is operably provided. When the air pressure of each pneumatic tank 9A, ..., 9G corresponding to each electromagnetic switching valve 21A, ..., 21G is lower than the set pressure individually set by the control command device 49, the first pilot valve 35A ,. , 35G to energize the supply passages 30A, ..., 30G and the output passages 32A, ..., 32G to communicate with the first switching positions X1, ..., X7 and the air pressures in the pneumatic tanks 9A ,. , 32G and the exhaust passages 31A, ..., 31G are energized by energizing the second pilot valves 37A, ..., 37G and the second switching positions Y1 ,. , When the air pressure in each pneumatic tank 9A, ..., 9G is a set pressure, the first pilot valves 35A, ..., 35G, the second pilot valves 37A ,. Close 32G Neutral position Z1, ..., and a Z7.

Next, the operation of this configuration will be described. In the state of FIG. 1, the air pressure of each pneumatic tank, 9A, ..., 9G is within the allowable range of the set pressure individually set by the control command device 49, and each electromagnetic switching valve 21A ,. , 35G and the second pilot valves 37A, ..., 37G are all non-energized and are located at neutral positions Z1, ..., Z7, and output holes 10A, ... Connected to the respective pneumatic tanks 9A ,. , 10G, output paths 26A, ..., 26G and output paths 32A ,.

From the state of FIG. 1, for example, when the air pressure in the pneumatic tank 9A becomes lower than the allowable range of the set pressure, the control command device 49 causes the electromagnetic switching valve 21A to move to the first position of the electromagnetic switching valve 21A according to the detection signal input from the pressure detection sensor 53A. 1 A serial control signal for energizing the pilot valve 35A is output to the solenoid valve driving device 3 via the signal line 50, and the solenoid valve driving device 3 converts the serial control signal from the control command device 49 into a parallel control signal. To the first switching position X1 from the neutral position Z1 by energizing the first pilot valve 35A through the electric wirings 46A and 47A and the electric wirings 42A and 43A based on the parallel control signal. In operation, the compressed air in the supply passage P1 flows through the branch supply hole 22A, the supply passages 24A and 30A, the output passages 32A and 26A, and comes out of the output passage 10A. Supply to the pneumatic tank 9A. Then, when the air pressure in the pneumatic tank 9A rises to within the allowable range of the set pressure, the control command device 49 sends a serial control signal for deenergizing the first pilot valve 35A of the electromagnetic switching valve 21A to the signal line. Output to the electromagnetic valve driving device 3 via 50, and the solenoid valve driving device 3 converts the serial control signal from the control command device 49 into a parallel control signal and based on this parallel control signal the first pilot The valve 35A is de-energized to return the electromagnetic switching valve 21A from the first switching position X1 to the neutral position Z1, and the compressed air in the supply passage P1 is no longer supplied to the pneumatic tank 9A. Keep the setting within the allowable range of the set pressure.

Further, when the air pressure of the pneumatic tank 9A becomes higher than the allowable range of the set pressure from the state of FIG. 1, the control command device 49 causes the second pilot valve 37A of the electromagnetic switching valve 21A to be energized. The control signal is output to the solenoid valve driving device 3, and the solenoid valve driving device 3 converts the serial control signal into a parallel control signal and based on the parallel control signal, the electric wirings 45A, 47A, the electric wiring 41A, The second pilot valve 37A is energized via 43A to operate the electromagnetic switching valve 21A from the neutral position Z1 to the second switching position Y1, and the compressed air in the pneumatic tank 9A is output through the output holes 10A to the output paths 26A, 32A, It flows through the exhaust passages 31A and 25A and the branch exhaust hole 23A and is exhausted to the atmosphere from the exhaust passage E1 through the silencer 19. Then, when the pneumatic pressure of the pneumatic tank 9A drops to within the allowable range of the set pressure, the control command device 49 outputs a serial control signal to the solenoid valve drive device 3 to deenergize the second pilot valve 37A. The solenoid valve driving device 3 converts this serial control signal into a parallel control signal, and de-energizes the second pilot valve 37A based on this parallel control signal to move the solenoid switching valve 21A from the second switching position Y1 to the neutral position. After returning to the position Z1, the compressed air in the pneumatic tank 9A is not exhausted and the air pressure in the pneumatic tank 9A is set and maintained within the allowable range of the set pressure.

Further, the air pressures of the pneumatic tanks 9B, ..., 9G are also set within the allowable range of the set pressure individually set by the control command device 49 by operating the electromagnetic switching valves 21B ,. Hold.

Further, from the state of FIG. 1, for example, the air pressures of the air pressure tank 9A and the air pressure tank 9G are set individually (the air pressure tank 9A is set to a higher pressure than the air pressure tank 9G). .), The control command device 49 sends a serial control signal for energizing the first pilot valve 35A of the electromagnetic switching valve 21A and the first pilot valve 35G of the electromagnetic switching valve 21G to the electromagnetic valve driving device. 3 and the solenoid valve drive device 3 converts this serial control signal into a parallel control signal, and based on this parallel control signal, the first pilot is sent via the electrical wiring 46A, 47A and electrical wiring 42A, 43A. The first pilot valve 35G is energized through the valve 35A, the electric wirings 46G and 47G, and the electric wirings 42G and 43G to turn on the electromagnetic switching valves 21A and 21G. It is operated from the neutral position Z1, Z7 to the first switching position X1, X7, and the compressed air in the supply passage P1 is supplied to the pneumatic tank 9A and the pneumatic tank 9G. At this time, the check valve 20A prevents the compressed air from flowing back to the pneumatic tank 9G having a lower setting pressure than the pneumatic tank 9A having a higher setting pressure. Then, when the air pressure in the pneumatic tank 9G rises to within the allowable range of the set pressure, the control command device 49 outputs a serial control signal to the solenoid valve drive device 3 to deenergize the first pilot valve 37G, The solenoid valve drive device 3 deenergizes the first pilot valve 37G and operates the solenoid switching valve 21G to return from the first switching position X7 to the neutral position Z7, and further the air pressure in the pneumatic tank 9A allows the set pressure. When the pressure rises to within the range, the control command device 49 outputs a serial control signal to the solenoid valve drive device 3 to deenergize the first pilot valve 37A, and the solenoid valve drive device 3 turns off the first pilot valve 37A. The electromagnetic switching valve 21A is energized to return the electromagnetic switching valve 21A from the first switching position X1 to the neutral position Z1, and the compressed air in the supply passage P1 is no longer supplied to the pneumatic tanks 9A and 9G. 9A, set held within the allowable range of the set pressure which is set individually air pressure 9G.

In this operation, the supply passage P1 of the manifold 1 and the single air pressure source P are connected by the pipe 18, so that the bases 2A, ... , 21G can be connected to a single pneumatic pressure source P via the supply passage P1, and a control command for outputting a serial control signal to the solenoid valve driving device 3 arranged in the manifold 1. By electrically connecting the signal line 50 from the device 49 and the electrical wiring 52A, 52B from the voltage source 51, the electromagnetic switching valves 21A, ..., 21G first pilot valves 35A ,. , 37G can be operated by energizing and de-energizing 37A, ..., 37G, respectively. Therefore, the supply passage of the manifold 1 can be supplied to the plurality of electromagnetic switching valves 21A ,. It suffices to connect P1 and the single air pressure source P by a single pipe 18, and at the same time, connect the solenoid valve drive device 3 with the signal line 50 from the control command device 49 and the electrical wiring 52A, 52B from the voltage source 51. It suffices to make an electrical connection. As in the conventional device, the supply holes of each electromagnetic switching valve and a single air pressure source are branched and connected to each electromagnetic switching valve according to the number of multiple electromagnetic switching valves. Compared to a valve that requires multiple electrical wiring to connect each valve and the corresponding controller, space for piping and wiring can be saved, and the entire device can be made compact. it can. Further, the supply passage P1 of the manifold 1 and the single air pressure source P are connected by a single pipe 18 regardless of the increase or decrease in the number of the electromagnetic switching valves 21A, ... Since the electrical connection by the signal line 50 from the control command device 49 and the electrical wiring 52A, 52B from the pneumatic pressure source 51 can be eliminated, the number of pneumatic tanks 9A, ..., 9G accompanying the specification change of the knockout device can be eliminated. It is possible to easily deal with increase and decrease of.

4 and 5 show another embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described. Each of the pneumatic tanks 9A, 9B, ... Is connected to seven die cushion devices provided in the transfer press via pneumatic cylinders 11A, 11B ,. The electromagnetic switching valves 62A, 62B, 62C, ... Are provided in a stacked manner on the seven bases 61A, ... Which constitute the manifold 60, and the check valve as in one embodiment is provided for each pneumatic tank 9A, 9B. It is not provided because there is no big difference in the set pressures set individually. Each electromagnetic switching valve 62A, 62B, 62C, ... Is composed of an electromagnetic supply valve 63A, 63B, 63C, ... And an electromagnetic exhaust valve 64A, 64B, 64C, ..., and each electromagnetic supply valve 63A, 63B, 63C ,. The supply valve elements 66A, ... Operate in the axial direction by energization / de-energization of the first pilot valves 65A, 65B, ..., and the supply passages 67A, ... And the output passages 68A, ... , Each of the electromagnetic exhaust valves 64A, 64B, 64C, ... is operated by the second pilot valves 69A, 69B ,. It is provided so that communication between and can be blocked. The supply passages 67A of the electromagnetic supply valves 63A, ... Are connected to the supply passages P1 of the manifold 60 and are connected to the branch supply holes 73A, ... , Output paths 68A, ... Are provided so as to communicate with output holes 10A, ... Connected to the respective pneumatic tanks 9A ,. .. The output passage 71A of each electromagnetic exhaust valve 64A ... Is branched and connected in parallel to the first branch output hole 74A ,. The exhaust passages 72A are connected to the exhaust passages E1 of the manifold 1 so as to be branched and connected to the branch exhaust holes 76A which are opened in the stacking surface. Two electric wirings 77A, 77B, ... And 78A, 78B from the first pilot valves 65A, 65B, ... of the respective electromagnetic switching valves 62A, 62B, 62C, ... And the second pilot valves 69A, 69B ,. , And 80A, 80B, ... are electrically connected to the terminal block members 82A, 82B, ... Fixedly mounted on the upper surface of the single wiring cover member 81 attached to the manifold 60. Are provided. Each terminal block member 82A, ... Inside electrically connects the electric wiring 77A, ... Of the first pilot valve 65A, ... With the electric wiring 83A, ..., And the electric wiring 79A of the second pilot valve 69A. , 84A, ..., Electrical wiring 78A of the first pilot valve 65A, ... And electrical wiring 80A of the second pilot valve 69A, ... are electrically connected to the electrical wiring 85A ,. .. The three electric wires 83A, 84A, 85A, ... From each terminal block member 82A, ... Are inserted into the wiring cover member 81 and electrically connected to the solenoid valve drive device 3 arranged at one end of the manifold 60. ing. The electromagnetic switching valves 62A, 62B, ... Energize the first pilot valves 65A, 65B, ... When the air pressure in the pneumatic tanks 9A, 9B ... Is lower than the set pressure individually set by the control command device 49. Then, the air pressure of the first switching position and the air pressure tanks 9A, 9B, ... that connect the supply passages 67A, ... And the output passages 68A, ... Of the electromagnetic supply valves 63A, 63B ,. When high, the second pilot valves 69A, 69B, ... Are energized to communicate between the output passages 71A, ... Of the electromagnetic exhaust valves 64A, 64B, ... And the exhaust passages 72A ,. When the air pressure in the pressure tanks 9A, 9B, ... Is a set pressure, the first pilot valves 65A, 65B, ..., The second pilot valves 69A, 69B ,. Output path 68A ... has solenoid exhaust valve 64A, 64B, ... of the output channel 71A, both close and neutral position ....

With such a configuration, it is possible to obtain the same operation and effect as in the embodiment, and it is possible to easily cope with the increase or decrease in the number of the pneumatic tanks 9A, 9B, ... Accompanying the specification change of the diction device. You can

In this embodiment, the electromagnetic switching valves 21A, ..., 21G, 62A, ... Are the first pilot valves 35A, ..., 35G, 65A, ... And the second pilot valves 37A ,. Although the pilot type using ... is used, it goes without saying that a direct acting type without using a pilot valve may be used.

[0021]

[Effect of the device]

 As described above, according to the present invention, the compressed air supply hole and the exhaust hole are formed by penetrating the opposite side surfaces, and the compressed air supply hole and the exhaust hole are formed on one side surface substantially orthogonal to the both side surfaces. A pedestal that is opened and has an output hole that connects to the compressed air use part, and a plurality of pedestals are sequentially connected so that each supply hole and each exhaust hole communicate with each other. Uses compressed air that is connected to the output holes by stacking a manifold that has a supply passage that supplies compressed air and an exhaust passage that is formed from each exhaust hole and that opens to the atmosphere, and each base that composes the manifold. The first switching position that supplies the compressed air in the supply passage to the output hole when the air pressure in the part is lower than the set pressure, and the compressed air in the output hole when the air pressure in the compressed air use part is higher than the set pressure. Second cut to exhaust to A solenoid switching valve that has a position and a neutral position that closes the output hole when the air pressure of the compressed air use part is a set pressure, and a serial control signal is converted into a parallel control signal by arranging it in the manifold. Since each solenoid switching valve is operated by energizing / de-energizing each solenoid switching valve based on a control signal, each solenoid switching valve can be operated according to the number of multiple solenoid switching valves as in a conventional device. The supply hole and the single air pressure source must be branched and connected by piping, and each electromagnetic switching valve and each controller provided corresponding to this must be electrically connected by a plurality of electric wirings. Compared with, the space for piping and wiring can be saved and the whole device can be made compact. Regardless of the increase or decrease in the number of solenoid operated directional control valves, the connection between the manifold supply passage and a single pneumatic pressure source is connected by a single pipe, and the signal line from the control command device that outputs a serial control signal is connected. Since it is not necessary to change the electrical connection from the voltage source to the electrical wiring to the solenoid valve drive device, it is possible to easily cope with the increase or decrease in the number of parts using compressed air due to the specification change of the knockout device, die cushion device, etc. It has the effect of being able to.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (A) is a front view of a pressure control device, and (B) is a circuit diagram in which a part of the pressure control device is omitted.

FIG. 2 is an enlarged cross-sectional view taken along the line KK of FIG.

3 is a partial cross-sectional view taken along the line LL of FIG.

FIG. 4 is a vertical cross-sectional view of a pressure control device according to another embodiment of the present invention.

5 is a reduced view seen from the arrow M of FIG.

FIG. 6 is an explanatory diagram of a pressure control device showing a conventional example.

[Explanation of symbols]

1, 60 Manifold 2A, 2B, 2C, 2D, 2E, 2F, 2G, 61A Base 3 Solenoid valve drive device 7A, ..., 7G supply hole 8A, ..., 8G exhaust hole 10A, 10B, 10C, 10D, 10E, 10F, 1
0G output holes 21A, 21B, 21C, 21D, 21E, 21F, 2
1G, 62A, 62B, 62C electromagnetic switching valve P1 supply passage E1 exhaust passage X1, ..., X7 first switching position Y1, ..., Y7 second switching position Z1, ..., Z7 neutral position

Claims (1)

[Scope of utility model registration request] 1. A compressed air supply hole and an exhaust hole are opened at both side surfaces facing each other to be penetrated and formed, and a supply hole and an exhaust hole are opened at one side surface substantially orthogonal to both side surfaces opening and compressed. A base with an output hole connected to the air use part and a plurality of bases are sequentially connected so that each supply hole and each exhaust hole communicate with each other, and the compressed air formed from each supply hole is supplied inside The air pressure of the compressed air use part connected to the output hole by stacking the manifold that extends through the supply passage and the exhaust passage that is formed by each exhaust hole and open to the atmosphere, and each base that configures the manifold. Is lower than the set pressure, the first switching position for supplying the compressed air in the supply passage to the output hole, and the second switching position for discharging the compressed air in the output hole to the exhaust passage when the air pressure in the compressed air use portion is higher than the set pressure.
An electromagnetic switching valve that has a switching position and a neutral position that closes the output hole when the air pressure of the compressed air use portion is a set pressure, and a serial control signal that is arranged in the manifold to convert a serial control signal into a parallel control signal. Control device, which operates by energizing and de-energizing each electromagnetic switching valve based on the control signal.