HK1136871B - A device for testing an electromagnetic valve - Google Patents

Description

Electromagnetic valve testing machine

Technical Field

The present invention relates to a solenoid valve testing machine used for checking the operation of a solenoid valve.

Background

Conventionally, tests have been performed periodically to determine whether or not the solenoid valve can be driven normally, whether or not the valve body is leaking, and the like. Various studies and developments have been made on a solenoid valve testing machine for testing the solenoid valve.

For example, patent document 1 discloses an automatic brake valve test device that automatically performs a stable test on a brake valve on the side of an electromagnetic valve while ensuring accurate reading and recording.

The brake valve automatic test device described in patent document 1 is a brake valve automatic test device that is provided in a brake device of a vehicle or the like, outputs a pressure required for braking in accordance with a rotation angle of a camshaft by rotating the camshaft of a brake valve main body, and outputs an electric signal, and is characterized by comprising: the cam shaft driving device includes a driving motor that rotates the cam shaft while engaging with the cam shaft, a pressure sensor that measures pressure output according to a rotation angle of the cam shaft rotated by the driving motor, a detection unit that detects opening and closing of an electrical contact that opens and closes according to the rotation angle of the cam shaft rotated by the driving motor, a control unit that controls driving of the driving motor, and a data processing unit that obtains, as a test result, an output pressure of a brake valve and an open and closed state of the electrical contact that change according to the rotation angle of the cam shaft based on signals from the pressure sensor and the detection unit.

Further, patent document 2 discloses a work clamping device that provides a highly safe work clamping device with a small number of components and without a worker being caught in the hand.

The work clamping device described in patent document 2 operates a clamp rod by switching and supplying a pressure fluid supplied from a pressure fluid source to a fluid pressure cylinder to which the clamp rod is connected via a directional switching valve; wherein the fluid pressure cylinder is set such that the piston pressure receiving area of the head side chamber is larger than the piston pressure receiving area of the rod side chamber, and the pressure fluid is introduced from the direction switching valve to the head side chamber to clamp the clamp rod, and the pressure fluid is introduced to the rod side chamber to loosen the clamp rod; a communication switching valve is provided for switching between a steady position at which a rod side chamber of the fluid pressure cylinder is connected to the direction switching valve and a communication position at which the rod side chamber communicates with the head side chamber.

Further, patent document 3 discloses a solenoid valve testing device that can be configured with a small number of components and that can reduce the testing time.

The solenoid valve testing device described in patent document 3 is a solenoid valve testing device for testing the performance of a solenoid valve, and includes: a plurality of mounting tables on which the solenoid valves are mounted, a control unit that drives the solenoid valves mounted on the mounting tables, electric wires that connect the control unit and the solenoid valves, a working fluid supply source that supplies a working fluid to a primary side that is a fluid inflow side of the solenoid valves, fluid supply paths that connect the working fluid supply source and the solenoid valves, primary side switching valves that are provided on the fluid supply paths corresponding to the mounting tables, respectively, and switch the paths to a connected state and a disconnected state on the primary side of the solenoid valves, respectively, and primary side pressure sensors that are provided corresponding to the mounting tables, respectively, and measure the primary side pressures of the solenoid valves, respectively; when a plurality of solenoid valves are mounted, the primary side of each solenoid valve is simultaneously filled with a working fluid of a predetermined pressure via each one-side switching valve, and then the pressure drop at the primary side of each solenoid valve is measured by each one-side pressure sensor, thereby testing the presence or absence of leakage of the working fluid from each solenoid valve.

Patent document 1: japanese laid-open patent publication No. 11-165632

Patent document 2: japanese laid-open patent publication No. 11-300563

Patent document 3: japanese patent laid-open publication No. 2004-125809

However, in the brake valve automatic test device of patent document 1, the work clamping device of patent document 2, and the solenoid valve test device of patent document 3, after the solenoid valve is mounted on the testing machine, it is necessary to perform fluid connection for supplying compressed air, solenoid valve control, and electrical connection for inputting various sensor signals between the solenoid valve and the solenoid valve testing machine. As a result, even when a plurality of solenoid valves of the same type are tested, it is necessary to perform these connections individually, which takes time and effort in the connection procedure.

Disclosure of Invention

The invention aims to provide a solenoid valve testing machine which can simply carry out the electrical connection of a solenoid valve in a solenoid valve test.

Another object of the present invention is to provide a solenoid valve testing machine which can easily perform electrical connection and fluid connection of a solenoid valve through one process in a solenoid valve test.

(1)

The electromagnetic valve testing machine of the invention comprises: the testing machine comprises a mounting accessory (delivery アタッチメント) corresponding to the solenoid valves and a testing machine body having a common pedestal for mounting the mounting accessory, wherein the mounting accessory is provided with a first electric connecting part for inputting an electric signal from the testing machine body and a second electric connecting part for outputting the electric signal input by the first electric connecting part and exposing a position where the solenoid valves are mounted.

In the electromagnetic valve testing machine of the present invention, the first electrical connection portion and the second electrical connection portion are provided on the mounting attachment. The second electrical connection portion is provided on an electrode of the solenoid valve mounted on the mounting attachment, and by mounting the solenoid valve on the mounting attachment, the electrode of the solenoid valve is connected to the second electrical connection portion of the mounting attachment. In addition, various attachment accessories are formed so as to be attachable to a common base.

When the electromagnetic valve testing machine is used, the labor for electrical connection can be reduced. That is, the position of the electrodes of the various solenoid valves varies with the type. For example, in the case where a plurality of the same type of solenoid valves are tested in succession, it is necessary to electrically connect the testing machine every time one solenoid valve is tested, but since the mounting attachment is provided with the second electrical connection portion communicating with the first electrical connection portion, electrical connection can be made only by mounting the solenoid valve on the mounting attachment, and there is no need to individually make electrical connection. That is, the electromagnetic valves can be electrically connected easily in the same step. Further, since the common base is provided, it is possible to easily perform a test of another type of solenoid valve by exchanging the attachment.

(2)

The mounting attachment may be given identification information indicating the types of the plurality of types of solenoid valves, and a common base of the testing machine body may have a reading mechanism for recognizing the identification information.

In this case, since the mounting accessory is provided with the identification information indicating the type of the solenoid valve and the reading means is provided on the common base of the testing machine main body, the type of the solenoid valve to be tested can be automatically determined by mounting the mounting accessory on the base of the testing machine main body. Therefore, the worker who performs the test does not need to input the type of the electromagnetic valve to the testing machine body again, and can simplify the work and further eliminate the work error.

(3)

The stand of the tester body may further include a fixing means for holding the mounting accessory in close contact.

In this case, since the fixing device for holding the attachment in close contact with the base of the testing machine body is provided, the attachment can be easily exchanged and the attachment can be easily carried out by the fixing device only by one operation.

(4) The fixing device may include a pushing mechanism that pushes the mounting accessory from vertically above to vertically below the pedestal.

The fixing device can press the mounting attachment from vertically above to vertically below the pedestal by the pressing mechanism. In addition, the self weight of the attachment can be utilized. As a result, the attachment can be firmly attached to the pedestal.

(5)

The attachment may include a first fluid connection portion that takes in fluid from the test machine body and a second fluid connection portion that communicates with the first fluid connection portion and is provided so as to be exposed at a portion where the plurality of types of electromagnetic valves are attached.

In this case, the solenoid valve testing machine can reduce the labor for fluid connection. That is, the positions of the fluid introduction ports of the plural types of solenoid valves vary depending on the type. For example, in the case where a plurality of the same type of solenoid valves are continuously tested, the testing machine needs to be fluidly connected to each solenoid valve when testing one solenoid valve, but since the mounting attachment is provided with the second fluid connection portion communicating with the first fluid connection portion, the mounting attachment can be fluidly connected only by mounting the solenoid valves, and there is no need to individually fluidly connect the solenoid valves. That is, the fluid connection of the solenoid valves can be easily performed in the same process. Further, since the common base is provided, it is possible to test other types of solenoid valves by replacing the attachment.

(6)

The first fluid connection portion may be provided with a connection port along a direction pushed by the pushing mechanism.

Since the connection port of the first fluid connection portion is provided in the direction pushed by the pushing mechanism, the pushing mechanism can push the connection port, and fluid leakage from the connection port can be prevented.

(7)

The mounting attachment may be provided with an elastic support member that supports various solenoid valves.

In this case, since the attachment includes the elastic support member for supporting the plurality of types of solenoid valves, when the worker performs the replacement operation of the solenoid valves, the worker can support the weight of the solenoid valves by the elastic support member, and the replacement operation of the solenoid valves can be easily performed. In particular, when the clamp is released to detach the solenoid valve, the worker does not need to hold the solenoid valve when the clamp is released in order to prevent the second electrical connection portion from being damaged by the weight of the solenoid valve, and thus the replacement work of the solenoid valve can be easily performed.

(8)

The elastic support member is preferably composed of a leaf spring member and a roller.

In this case, the elastic support member is composed of a plate spring member and a roller. For example, a roller is preferably provided at the tip of the leaf spring member. Further, when the solenoid valves are exchanged, friction between the solenoid valves and the elastic support member can be reduced by the rollers. Further, since the roller can be always brought into close contact with the solenoid valve by the plate spring member, it is possible to prevent the second electrical connection portion from being damaged by the weight of the solenoid valve, particularly when the clamp is released for detaching the solenoid valve.

(9)

The mounting attachment may include a guide member for guiding the plurality of types of solenoid valves to the mounting positions.

In this case, since the mounting attachment includes the guide member for guiding the plurality of types of solenoid valves to the mounting positions, the solenoid valves can be easily aligned when the worker performs the replacement work of the solenoid valves.

Drawings

FIG. 1 is a schematic view showing an example of a solenoid valve testing machine according to an embodiment of the present invention;

fig. 2 is a schematic perspective view for explaining a connection state of the mount table and the accessory;

FIG. 3 is a schematic process diagram for explaining an example of a process of mounting an accessory on the mounting table shown in FIG. 2;

FIG. 4 is a schematic process diagram for explaining an example of a process of attaching the solenoid valve to the attachment attached to the mount table shown in FIG. 3;

FIG. 5 is a schematic process diagram for explaining an example of a process of attaching the solenoid valve to the attachment attached to the mount table shown in FIG. 3;

FIG. 6 is a schematic process diagram for explaining an example of a process of attaching the solenoid valve to the attachment attached to the mount table shown in FIG. 3;

FIG. 7 is a schematic sectional view for explaining the connection of the solenoid valve, the attachment, and the mount;

FIG. 8 is a schematic sectional view for explaining the connection of the solenoid valve, the attachment, and the mount;

fig. 9 is a schematic view for explaining the kind of the attachment 300 provided on each of the different kinds of solenoid valves;

FIG. 10 is a flowchart showing an example of a process for performing the solenoid valve test;

fig. 11 is a schematic perspective view for explaining a connection state of the mount table and the accessory;

FIG. 12 is a schematic enlarged view for explaining an example of the pair of support member mechanisms of FIG. 11;

FIG. 13 is a schematic process diagram for explaining an example of a process of mounting the solenoid valve to the attachment shown in FIGS. 11 and 12;

FIG. 14 is a schematic process diagram for explaining an example of a process of attaching the solenoid valve to the attachment shown in FIGS. 11 and 12;

fig. 15 is a schematic process diagram for explaining an example of a process of attaching the solenoid valve to the attachment shown in fig. 11 and 12.

Description of the reference numerals

100 solenoid valve testing machine

101 tester body

200a, 200b mounting table

230a, 230b accessory clamp mechanism

241, 242, 243 are electrically connected terminals

251, 252, 253 air port connection

260 accessory type identification switch

300, 301, 300a accessories

351, 352, 353 electromagnetic valve air port connecting part

360 attachment type information section

371, 372, 373 electric connection terminal

400 solenoid valve

Detailed Description

The following describes embodiments of the present invention. In the present embodiment, a case will be described in which the electromagnetic valve testing machine is applied to the electromagnetic valve testing machine of the railway vehicle. However, the present invention is not limited to the electromagnetic valve testing machine for railway vehicles, and can be applied to any other electromagnetic valve testing machine.

(first embodiment)

Fig. 1 is a schematic diagram showing an example of a solenoid valve testing machine 100 according to a first embodiment of the present invention, in which fig. 1(a) shows a front view of the solenoid valve testing machine 100, and fig. 1(b) shows a side view of the solenoid valve testing machine 100.

As shown in fig. 1(a), the electromagnetic valve testing machine 100 is composed of a testing machine body 101 and a control box 102. The control box 102 is provided with a control panel, a computer, a keyboard, a mouse, a printer, and the like (not shown). As shown in fig. 1(a), signal lamps 900a and 900b, a liquid crystal display device, and a measuring instrument 800 are disposed on the upper portion of the tester main body 101.

As these measuring instruments 800, a pressure transducer, a pressure sensor, and the like are used. For example, an amplifier-embedded strain gauge type pressure transducer or the like is used for air pressure measurement, and an amplifier-embedded semiconductor type pressure sensor or the like is used for leakage measurement and air source pressure measurement. The measuring instrument 800 incorporates an electric air conditioner for converting an electric signal into air pressure.

As shown in fig. 1(b), the test machine body 101 is provided with a test table 111 having a horizontal portion, and two mounting tables 200a and 200b are provided on the surface of the test table 111. For convenience of explanation, reference numerals are given to the mounting tables 200a, 200b, but both have the same shape. In addition, an attachment 300 is mounted on each mounting platform 200a, 200 b. Next, the mounting of the mounting bases 200a, 200b and the attachment 300 will be described in detail.

Fig. 2 is a schematic perspective view for explaining a connection state of the mounting bases 200a, 200b and the attachment 300.

As shown in fig. 2, the mounting tables 200a, 200b are mainly constituted by an accessory mounting table (hereinafter referred to as a base) 201 and accessory clamp mechanisms 230a, 230b extending in a vertically upward direction from the base 201. In the present embodiment, the accessory clamping mechanisms 230a, 230b are constituted by air clamp mechanisms, and have accessory clamping rods 231a, 231b and cylinders 232a, 232 b. Details of the accessory clamping mechanisms 230a and 230b will be described later.

As shown in fig. 2, the upper surface of the base 201 is provided with accessory positioning pins 210a, 210b, electrical connection terminals 241, 242, 243, air port connection parts 251, 252, 253, and an accessory type identification switch 260 composed of three limit switches. The air passages of the air port connection portions 251, 252, and 253 are opened and closed by electromagnetic opening and closing valves, not shown. As the electromagnetic on-off valve, a small solenoid valve of a direct-acting type can be used in a small flow rate circuit, and a pilot solenoid valve type diaphragm on-off valve can be used in a large flow rate circuit. The electric connection terminals 241, 242, and 243 output electric signals from the test machine body 101 for controlling the solenoid valve 400, and when a pressure sensor or the like is provided in the solenoid valve 400, electric signals of the pressure sensor are input to the test machine body 101.

As shown in fig. 2, the accessory 300 includes electric connection terminals 371, 372, 373, air port connection parts 351, 352, 353, an accessory type information part 360 indicating the type of the electromagnetic valve, a connector 370, electromagnetic valve air port connection parts 381, 382, 383, an electromagnetic valve clamping mechanism 390a, 390b for holding the electromagnetic valve, and handles 395a, 395 b. The solenoid valve clamping mechanisms 390a, 390b are constituted by pneumatic clamp mechanisms using polyurethane tubes or nylon tubes, and the interfaces are constituted by simple one-time embedded operation.

Here, the worker holds the handles 395a and 395b of the attachment 300 and attaches the same to the mounting stands 200a and 200b from above in the direction of the arrow R1.

Next, fig. 3 is a schematic process diagram illustrating an example of a process of mounting the attachment 300 on the mounting tables 200a and 200b shown in fig. 2. Fig. 3(a), (b), and (c) show the steps of mounting the attachment 300 on the mounting tables 200a, 200b in this order.

First, as shown in fig. 3(a), the attachment 300 is lowered from above to the mounting tables 200a, 200b, and the attachment positioning pins 210a, 210b on the base 201 are inserted into the holes 310a, 310b provided on the lower surface of the attachment 300, respectively.

Thus, the attachment 300 is disposed at a predetermined position of the base 201. In addition, the accessory positioning pins 210a, 210b on the base 201 are not uniformly arranged, but are set to prohibit the reverse insertion of the accessory 300 due to the relationship with the holes 310a, 310b provided on the lower surface of the accessory 300.

Next, as shown in fig. 3(b), the accessory clamp levers 231a, 231b of the accessory clamp mechanisms 230a, 230b are slid over the accessory 300. The accessory clamp levers 231a, 231b are pivotally supported near the accessory clamp support portions 233a, 233 b.

Finally, as shown in fig. 3(c), the cylinders 232a, 232b of the attachment clamp mechanisms 230a, 230b extend in the direction of the arrow F3, and the other end sides of the attachment clamp levers 231a, 231b are pushed in the vertically upward direction. Thus, the attachment 300 is pressed from the vertically upper direction toward the vertically lower direction (the direction of the arrow F2) by the one end sides of the pivotally supported attachment clamp rods 231a, 231 b. As a result, the attachment 300 is press-fitted to the mounting tables 200a, 200 b. In this case, since the accessory clamp mechanisms 230a, 230b are constituted by the air jig mechanisms, the worker can mount the accessory 300 on the mount tables 200a, 200b by one operation without tools.

Next, fig. 4, 5, and 6 are schematic process diagrams for explaining an example of a process of attaching the solenoid valve 400 to the attachment 300 attached to the mount 200a and 200b shown in fig. 3. Fig. 4, 5 and 6 show a process of sequentially mounting the solenoid valve 400 on the attachment 300 mounted on the mounting tables 200a and 200 b.

First, as shown in FIG. 4, the solenoid clamping levers 392a, 392b of the solenoid clamping mechanisms 390a, 390b move in the direction of arrow-M2 without contacting the solenoid 400. Then, the solenoid valve 400 is moved in the direction of the arrow M1 and mounted on the attachment 300.

Next, as shown in fig. 5, the solenoid clamping levers 392a, 392b of the solenoid clamping mechanisms 390a, 390b are moved in the direction of arrow M2.

Finally, as shown in fig. 6, the cylinders 391a, 391b of the solenoid valve clamping mechanisms 390a, 390b extend in the direction of the arrow M3, and the other end sides of the solenoid valve clamping rods 392a, 392b move in the downward direction in the drawing. As a result, the solenoid clamp rods 392a, 392b axially supported move in the direction of the arrow R4, and one end sides of the solenoid clamp rods 392a, 392b press the solenoid valve 400 in the direction of the arrow M5. As a result, the solenoid valve 400 is press-fitted to the attachment 300. In this case, since the solenoid valve clamping mechanisms 390a, 390b are constituted by pneumatic furniture mechanisms, the worker mounts the solenoid valve 400 on the attachment 300 by one operation without tools.

Next, fig. 7 and 8 are schematic sectional views for explaining the connection of the solenoid valve 400, the attachment 300, and the mounting tables 200a and 200 b.

First, as shown in fig. 7, the solenoid valve 400 is provided with a connector 410 for inputting a control signal of the solenoid valve, and air port connection portions 421, 422, 423. The solenoid valve 400 may be provided with a sensor such as a pressure sensor. At this time, the signal of the sensor is output via the connector 410. The attachment 300 is provided with a connector 370 for outputting a control signal of the solenoid valve or inputting a signal of a sensor provided in the solenoid valve 400, electrical connection terminals 371, 372, 373, solenoid valve air port connection portions 381, 382, 383, and air port connection portions 351, 352, 353. The connector 370 and the electrical connection terminals 371, 372, 373 are electrically connected inside the accessory 300. Here, the term "conductive" means that not only direct electrical wiring but also indirect electrical wiring is performed, and for example, a semiconductor or a microcomputer is mounted between the connector 370 and the electrical connection terminals 371, 372, 373. The solenoid valve air port connection parts 381, 382, 383 and the air port connection parts 351, 352, 353 are communicated with each other inside the attachment 300. Further, the mounting tables 200a and 200b are provided with air port connection portions 251, 252 and 253 and electrical connection terminals 241, 242 and 243.

As shown in fig. 7, when the solenoid valve clamping mechanisms 390a and 390b apply a force in the direction of arrow M5, the air port connection portions 421, 422, 423 and the solenoid valve air port connection portions 381, 382, 383 are closely attached to each other via an O-ring, a washer, or the like, not shown, and the connector 410 and the connector 370 are firmly connected to each other.

In addition, when the accessory clamp mechanisms 230a and 230b apply a force in the direction of the arrow F2, the air vent connection portions 351, 352 and 353 and the air vent connection portions 251, 252 and 253 are closely connected, and the electric connection terminals 371, 372 and 373 are firmly connected to the electric connection terminals 241, 242 and 243.

Further, as shown in fig. 8, the accessory type information unit 360 is firmly connected to the accessory type recognition switch 260.

Next, fig. 9 is a schematic diagram for explaining the kind of the attachment 300 provided on each of the different kinds of solenoid valves 400. Fig. 9(a) is a schematic diagram for explaining one attachment 300, and fig. 9(b) is a schematic diagram for explaining another attachment 301.

First, as shown in fig. 9(a), the connector 370 of the solenoid valve 400 is disposed in the center portion, but as shown in fig. 9(b), the connector 370a of the solenoid valve 400 is disposed in the right direction. This arrangement is performed according to the arrangement of the connector 410 of the solenoid valve 400.

As shown in fig. 9(a), the solenoid valve air port connection 381 and the solenoid valve air port connection 382 are provided on the left side of the connector 370, and the solenoid valve air port connection 383 is provided on the right side of the connector 370, but as shown in fig. 9(b), the solenoid valve air port connection 384 is provided on the left side of the connector 370a, and the solenoid valve air port connection 385 and the solenoid valve air port connection 386 are provided on the right side of the connector 370 a. The arrangement of these solenoid valve air port connection portions is performed according to the arrangement of the connector 410 of the solenoid valve 400, as in the connector 370.

In addition, the accessory type information part 360 of the accessory 300 shown in fig. 9(a) and 9(b) is provided to contact the accessory type recognition switch in a different form since it indicates the type of each accessory.

For example, as shown in fig. 9(a), among the three limit switches of the accessory type identification switch 260, the accessory type information portion 360 of the accessory 300 is configured to protrude at a portion facing the limit switch so that only the limit switch positioned at the center is turned on.

On the other hand, as shown in fig. 9(b), among the three limit switches of the accessory type identification switch 260, the accessory type information part 360 of the accessory 300 is configured to protrude at a portion facing the limit switch so that only the limit switch positioned on the right side is turned on.

Therefore, since the solenoid valve testing machine 100 can automatically recognize the difference between the attachment 300 and the attachment 301, the worker does not need to input the difference between the attachment 300 and the attachment 301 to the solenoid valve testing machine 100, and the work can be simplified and the work error can be eliminated.

In the present embodiment, the accessory type identification information portion 360 is mechanically configured, but information for identifying the type of the accessory may be stored by, for example, a one-dimensional or two-dimensional barcode, an IC tag, or an electromagnetic method. In this case, the accessory type identification switch 260 is configured to be able to identify the information by, for example, a barcode reader or the like.

In the present embodiment, the accessory type identification switch 260 is configured by three limit switches, that is, 3-bit (3 ビット) information is read, but the present invention is not limited to this, and the number of bits may be increased in order to identify more types.

Further, the information can be represented by a decimal number, a hexadecimal number, or the like as appropriate, in addition to a binary number.

Next, fig. 10 is a flowchart showing an example of a process when the solenoid valve 400 is tested.

First, the attachments 300 corresponding to the type a valves of the solenoid valves 400 are mounted on the mounting bases 200a, 200b in the order described. Next, as shown in fig. 10, the type a valves of the two solenoid valves 400 are attached in the order described (step S1). Subsequently, the memo data of the two solenoid valves 400 is input (step S2). For example, a serial number of the solenoid valve 400 is input. Although the input is performed by the operator using a keyboard, the input may be automatically performed by adding a barcode, an IC tag, or the like to the solenoid valve 400. Then, since the two mount tables 200a and 200b are provided, the two processes are performed in parallel.

The mounting tables 200a and 200b perform test operations of the solenoid valve 400 (steps S3a and S3 b). Next, the mounting tables 200a and 200b are subjected to a leakage test of the solenoid valve 400 (steps S4a and S4 b). Further, the mounting tables 200a and 200b are subjected to an operation pressure test of the solenoid valve 400 (steps S5a and S5 b). Next, the mount 200a and the mount 200b are subjected to a capacity test of the solenoid valve 400 (steps S6a and S6 b). Then, the mounting tables 200a and 200b are subjected to a leak test of the solenoid valve 400 as a whole (steps S7a and S7 b).

Then, the test result of the solenoid valve 400 is confirmed (step S8). Then, it is determined whether it is necessary to retest the solenoid valve 400 (step S9). If it is determined that the retest is necessary, the process of step S2 to the process of step S8 are repeated. On the other hand, when it is determined that the retest is not necessary, it is determined whether or not the type of the solenoid valve 400 is changed (step S10).

If it is determined that the category is not to be changed, the processing of step S1 through step S9 is repeated. At this time, the solenoid valve 400 is exchanged in the order described above. When the type of the change is determined, the attachment 300 is replaced in the same order as described above.

In the above-described embodiment, when the solenoid valves 400 are exchanged, since it is not necessary to perform the electrical connection and the fluid connection, respectively, the operation time can be reduced.

As described above, in the solenoid valve testing machine 100 according to the present invention, the labor for electrical connection when exchanging the solenoid valve 400 can be reduced. That is, the connector 410 of the various solenoid valves 400 is located differently according to the kind. An accessory 300 is provided on each category. For example, in the case where a plurality of the same type of solenoid valves 400 are tested in succession, electrical connection to the solenoid valve testing machine 100 is required every time one solenoid valve 400 is tested, but since the attachment 300 is provided with the connector 370 that is in electrical communication with the electrical connection terminals 371, 372, 373, electrical connection to the connector 410 is possible by attaching only the solenoid valve 400 to the attachment 300, and electrical connection to each of the connectors is not required.

In addition, in the solenoid valve testing machine 100, the labor for fluid connection when exchanging the solenoid valve 400 can be reduced. That is, the fluid introduction ports of the plural types of solenoid valves 400 are different in position depending on the type. An attachment 300 is provided for each category. For example, in the case where a plurality of the same type of solenoid valves 400 are tested in succession, the solenoid valve testing machine 100 needs to be fluidly connected to each time one solenoid valve 400 is tested, but since the attachment 300 is provided with the solenoid valve air port connection portions 381, 382, 383 that are in conduction with the air port connection portions 351, 352, 353, it is possible to fluidly connect to the air port connection portions 421, 422, 423 by attaching only the solenoid valve 400 to the attachment 300, and it is not necessary to fluidly connect to each other.

Since the accessory 300 is provided with the accessory type information part 360 indicating the type of the solenoid valve 400 and the accessory type recognition switches 260 are provided on the mounting bases 200a and 200b of the testing machine body 101 of the solenoid valve testing machine 100, the type of the solenoid valve 400 to be tested can be automatically determined by mounting the accessory 300 on the mounting bases 200a and 200 b. Therefore, the worker who performs the test can simplify the work and eliminate the work error without inputting the type of the solenoid valve 400 to the testing machine body 101 again.

Further, since the attachment clamping mechanisms 230a and 230b for holding the attachment 300 in close contact with each other are provided on the mounting bases 200a and 200b, the attachment 300 can be easily replaced and can be easily mounted by one operation using the attachment clamping mechanisms 230a and 230 b.

In addition, the accessory clamp mechanisms 230a, 230b can press the accessory 300 from the opposite direction of the mounting tables 200a, 200b toward the mounting tables 200a, 200b by the air clamp mechanism. As a result, the attachment 300 can be firmly attached to the mounting tables 200a and 200 b.

Further, since the connection ports of the air port connection portions 251, 252, and 253 are provided in the direction in which the air pressure jig mechanism presses, the pressing force can be applied to the connection ports by the weight of the attachment 300 and the air pressure jig mechanism, and the fluid leakage can be prevented.

(second embodiment)

The second embodiment of the present invention will be described. In the second embodiment, a description will be given of a point different from the first embodiment. In the second embodiment, the attachment 300a is employed instead of the attachment 300.

Fig. 11 is a schematic perspective view for explaining a connection state of the mounting bases 200a, 200b and the attachment 300 a.

As shown in fig. 11, the mounting tables 200a, 200b have the same structure as the mounting tables 200a, 200b of fig. 2. In addition, since the solenoid valve 400a different from the first embodiment is attached to the attachment 300a, the attachment 300a further includes a pair of guide rods 311 and a pair of support members 320 on the attachment 300.

In the present embodiment, the electrical connection terminals 371, 372, 373 and the air vent connection parts 351, 352, 353 are not shown in the attachment 300 a.

Next, fig. 12 is a schematic enlarged view for explaining an example of the structure of the pair of support members 320 in fig. 11.

As shown in fig. 12, the pair of support members 320 includes an elastic plate 321, a roller 322, a fixed plate 323, and a shaft 325. The elastic plate 321 is formed of a plate material having bending elasticity.

The fixed plate 323 is formed to protrude downward from the position where the solenoid valve 400a of the attachment 300a is attached, and the elastic plate 321 is fixed to the fixed plate 323 by a bolt BT. The front end of the elastic plate 321 is formed in a substantially コ shape, and a shaft 325 is provided on a rising wall formed in a substantially コ shape. The roller 322 is provided on the shaft 325 so as to be rotatable about the shaft 325.

Next, fig. 13, 14 and 15 are schematic process diagrams for explaining an example of a process of attaching the solenoid valve 400a to the attachment 300a shown in fig. 11 and 12.

As shown in fig. 13, a pair of holes 211 are formed in the solenoid valve 400 a.

In addition, the operator moves the solenoid valve 400a in the direction of arrow M21 so that it approaches the attachment 300 a. Then, as shown in fig. 13 and 14, the lower end portion of the solenoid valve 400a is brought into contact with the rollers 322 of the pair of support members 320.

At this time, the weight of the solenoid valve 400a is elastically held by the elastic plates 321 of the pair of support members 320. In addition, the elastic plate 321 has such elasticity that the connector 370 can be maintained at a level of elasticity that is not broken by the weight of the solenoid valve 400 a.

Next, as shown in fig. 14, the worker moves the solenoid valve 400a supported by the rollers 322 of the pair of support members 320 in the direction of the arrow M11.

At this time, the pair of guide rods 311 are inserted into the pair of holes 211 provided in the solenoid valve 400 a. In this case, since the chamfer is formed at the tip end portions of the pair of guide rods 311, a play, that is, an extra space exists between the inner periphery of the hole portion 211 of the solenoid valve 400a and the outer periphery of the guide rod 311 of the attachment 300a, and therefore, the mutual fitting can be performed smoothly while absorbing the positional deviation.

At this time, since the solenoid valve 400a is supported by the rollers 322 of the pair of support members 320, the worker can easily move the solenoid valve in the direction of the arrow M11. That is, the weight of the solenoid valve 400a is supported by the pair of support members 320, and the solenoid valve 400a can be moved in a state where the frictional resistance is reduced by the roller 322.

Finally, as shown in fig. 15, the pair of guide rods 311 are fitted into the pair of hole portions 211.

Then, as in the first embodiment, the solenoid valve 400a is press-fitted to the attachment 300a by the solenoid valve clamping mechanisms 390a, 390 b.

In addition, when the solenoid valve 400a is removed, first, the solenoid valve clamping mechanisms 390a and 390b are released from being pressed. At this time, the solenoid valve 400a falls or tilts vertically downward from the attachment 300a by the amount of play that exists between the inner periphery of the hole 211 of the solenoid valve 400a and the outer periphery of the guide rod 311 of the attachment 300 a. However, since the solenoid valve 400a is elastically held by the elastic plates 321 of the pair of support members 320, the solenoid valve 400a is held without falling or tilting vertically even if the play described above exists. Thus, the connector 370 can be effectively prevented from being damaged by the weight of the solenoid valve 400 a.

In the embodiment of the present invention, the electromagnetic valve 400, 400a corresponds to an electromagnetic valve, the accessories 300, 301, 300a corresponds to mounting accessories, the mounting tables 200a, 200b correspond to mounting bases, the testing machine body 101 corresponds to a testing machine body, the electric connection terminals 371, 372, 373 correspond to first electric connection portions, the connector 370 corresponds to second electric connection portions, the electromagnetic valve testing machine 100 corresponds to an electromagnetic valve testing machine, the accessory type information portion 360 corresponds to identification information, the accessory type identification switch 260 corresponds to reading means, the accessory clamp mechanisms 230a, 230b correspond to fixing means, the accessory clamp levers 231a, 231b and the cylinders 232a, 232b correspond to pressing means, the air port connection portions 251, 252, 253 correspond to first fluid connection portions and connection ports, the electromagnetic valve air port connection portions 351, 352, 353 correspond to second fluid connection portions, the pair of supporting members 320 correspond to elastic supporting members, the elastic plate 321 corresponds to a leaf spring member, the roller 322 corresponds to a roller, and the pair of guide rods 311 corresponds to a guide member.

A preferred embodiment of the present invention is as described above, but the present invention is not limited to the embodiment. In addition, it is to be understood that various embodiments may be modified into other embodiments without departing from the spirit and scope of the present invention. Further, in the present embodiment, the operation and effect of the configuration according to the present invention are described, but these operation and effect are only an example and do not limit the present invention.

Claims (9)

1. A solenoid valve testing machine, characterized by comprising:

mounting accessories provided corresponding to a plurality of kinds of electromagnetic valves, and

a tester body having a common mounting for the mounting attachments,

the mounting attachment is provided with a first electrical connection portion to which an electrical signal from the testing machine body is input, and a second electrical connection portion which outputs the electrical signal input from the first electrical connection portion and is provided so as to be exposed at a portion where the plurality of types of electromagnetic valves are mounted.

2. The solenoid valve testing machine according to claim 1, wherein the mounting attachment is given identification information indicating a kind of the plurality of kinds of solenoid valves,

the common base of the test machine bodies has a reading means for recognizing the identification information.

3. The solenoid valve testing machine of claim 1 or 2, wherein the common base of the testing machine body further comprises a fixing means for snugly holding the mounting attachment.

4. The electromagnetic valve testing machine according to claim 3, wherein said fixing means includes an urging mechanism that urges said mounting attachment from vertically above to vertically below the pedestal.

5. The electromagnetic valve testing machine according to claim 1, wherein the attachment fitting is provided with a first fluid connection portion for taking in a fluid from the testing machine body, and a second fluid connection portion which communicates with the first fluid connection portion and is provided so as to be exposed at a portion where the plurality of types of electromagnetic valves are attached.

6. The electromagnetic valve testing machine according to claim 5, wherein the first fluid connecting portion is provided with a connection port in a direction of being pushed by the pushing mechanism.

7. The electromagnetic valve testing machine according to claim 1, wherein the mounting attachment is provided with an elastic support member that supports the plurality of types of electromagnetic valves.

8. The electromagnetic valve testing machine according to claim 7, wherein the elastic support member is composed of a plate spring member and a roller.

9. The solenoid valve testing machine according to claim 1, wherein the mounting attachment includes a guide member for guiding the plurality of types of solenoid valves to mounting positions of the respective solenoid valves.