JP3810915B2 - Diaphragm leak inspection device - Google Patents

Description

[0001]
【Technical field】
The present invention relates to an apparatus for inspecting diaphragm leakage.
[0002]
[Prior art and its problems]
Diaphragms are used for safety devices such as brakes for vehicles, and are therefore inspected for leaks (holes). Since it is produced in large quantities, it is a matter of concern how efficiently the leakage inspection and the separation and removal of the good and defective products are performed.
[0003]
OBJECT OF THE INVENTION
Accordingly, it is an object of the present invention to obtain a leakage inspection apparatus capable of efficiently performing a leakage inspection of a diaphragm and separating and taking out a non-defective product and a defective product. It is another object of the present invention to obtain an apparatus that can efficiently transport separated good products.
[0004]
Summary of the Invention
The diaphragm inspection apparatus of the present invention includes a rotary table that is intermittently rotated by equal angles; a plurality of inspection stages that are arranged on the rotary table in the circumferential direction at an angular interval of intermittent rotation; Having at least a loading position, an inspection position, and an extraction position of each inspection stage; each of the inspection stages has a pair of an upper mold and a lower mold and are arranged in a straight line orthogonal to the radial direction of the rotary table 3 Having at least one inspection mold, and each inspection mold has an upper mold and a lower mold that sandwich the periphery of the diaphragm to be formed and form a deformation space in the center; a plurality of inspection molds Upper mold lifting mechanism that raises and lowers the upper mold of each inspection mold; each of the lower molds of the plurality of inspection molds of each inspection stage is A lower mold advance / retreat mechanism that moves forward and backward between the horizontal position and the radially outer attaching / detaching position of the rotary table; when each inspection stage is in the loading position and the plurality of lower molds are in the attaching / detaching position, the plurality A test diaphragm loading mechanism for supplying a test diaphragm onto the lower mold; a plurality of lower molds of each inspection stage mounted with the test diaphragm by the test diaphragm loading mechanism are moved below the plurality of upper molds by a lower mold advance / retreat mechanism. The inspection diaphragm between the lower mold and the upper mold on the inspection stage at the inspection position where the upper mold is moved to the position and the plurality of upper molds of the inspection stage are lowered onto the lower mold by the upper mold lifting mechanism. Leak inspection mechanism for inspecting leakage by applying air pressure to the test piece; when each inspection stage is in the take-out position and the plurality of lower molds are in the attachment / detachment position, the test diaphragms on the plurality of lower molds are adsorbed It has a number of vacuum cups arranged in a straight line, moves back and forth in the direction of the vacuum cups, and moves the vacuum cups to different positions depending on whether the inspection results by the leak inspection mechanism are good or defective. And a diaphragm separation / extraction mechanism to be divided into good and defective products.
[0005]
In order to increase the number of diaphragms to be inspected at the same time, it is preferable that the angular interval of intermittent rotation is 90 ° and that there are four or more inspection molds on one inspection stage.
[0006]
Specifically, the leakage inspection mechanism includes, for example, a sandwiched portion at the periphery of the diaphragm to be tested formed in each of the upper mold and the lower mold; a compressed air introduction path formed in one of the upper mold and the lower mold, and the compressed air The deformation space formed in the other of the upper mold and the lower mold, which allows the test diaphragm to be deformed by the compressed air introduced from the introduction path; and after the test diaphragm is deformed by the compressed air, the test diaphragm is And a pressure detector for detecting a pressure drop in the chamber to be created.
[0007]
The part that receives non-defective products from the diaphragm separation / extraction mechanism is provided with a non-defective container having a plurality of storage cylinders arranged in a straight line to store the test diaphragms. When the diaphragm is stored in a plurality of storage cylinders of the passable container, it can be transported as it is after separation.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The rotary table 10 shown in FIGS. 1 to 3 is intermittently rotated by an equal angle (90 ° in the illustrated embodiment), and includes inspection stages 11 at equal angular intervals as the intermittent rotation angle. In this example, each inspection stage 11 has four inspection dies 20 arranged in a straight line in a direction orthogonal to the radial direction of the rotary table 10, and each inspection dies 20 includes an upper die 21, a lower die 22, and the like. It is made up of. The four upper molds 21 of each inspection stage 11 are simultaneously driven up and down by an upper mold lifting mechanism 23. The four lower molds 22 of each inspection stage 11 are on a lower mold base 22c, and the lower mold base 22c is moved along a radial guide rail 24 of the rotary table 10 by a lower mold advance / retreat mechanism (not shown). Is possible.
[0009]
As shown in FIG. 2, loading position A, inspection positions B and C, and take-out position D of work (diaphragm to be tested) W are set in turn table 10 in correspondence with the intermittent rotation angle in the rotation direction. The four lower molds 22 of each inspection stage 11 are drawn along the guide rails 24 to the lower positions of the four upper molds 21 at the loading position A, and pushed out at the take-out position D to the attachment / detachment position. Until then, the lower position of the upper die 21 is held. On the other hand, the four lower molds 22 of each inspection stage 11 pushed out along the guide rails 24 at the take-out position D are then pulled to the lower positions of the four upper molds 21 in the rotational phase after the loading position A. Until then, it is held in the outward position (detachment position).
[0010]
On the other hand, the four 21 that are paired with the four lower molds 22 of each inspection stage 11 are when the lower mold 22 of each inspection stage 11 is below the upper mold 21, that is, the inspection stage 11 of the rotary table 10. Is at least in the rotational phase of inspection positions B and C, it is lowered onto the upper mold 21 by the upper mold lifting mechanism 23, and at the take-out position D and loading position A, the four lower molds 22 of each inspection stage 11 are removed. When moving to the other attachment / detachment position, the upper die lifting mechanism 23 moves up and leaves the upper die 21.
[0011]
As shown in FIGS. 4 and 5, the lower mold 22 of each inspection mold 20 has irregularities 22 a that substantially match the shape of the workpiece W, and the peripheral portion serves as a clamping portion 22 b of the workpiece W. The lower mold 22 is formed with a compressed air introduction path 26 at the center thereof, and the compressed air introduction path 26 is connected to a compressed air source 28 via an on-off valve 27 and a pressure detector (pressure). (Fall detector) 29. The upper mold 21 has a clamping part 21 a that clamps the peripheral edge of the work W, and a deformation space (concave part) 21 b of the work W. The upper mold 21, the lower mold 22, the compressed air introduction path, the on-off valve 27, the compressed air source 28, and the pressure detector 29 constitute a leakage inspection mechanism.
[0012]
At the loading position A, a loading mechanism 12 for the workpiece W is provided. As illustrated in FIGS. 1 and 2, the work loading mechanism 12 includes a horizontal articulated robot 13 and a container lifting mechanism 14. The horizontal articulated robot 13 includes a plurality of rotating arms 15 and a vacuum cup 16 provided at the tips of the plurality of arms 15, and can move the vacuum cup 16 to an arbitrary position. On the other hand, the container elevating mechanism 14 includes a mounting table 18 on which a plurality of stacked work containers 17 are mounted, and a feed screw mechanism 19 that lifts and lowers the mounting table 18. The work container 17 has legs 17a for overlapping each other at four corners. In the illustrated example, a plurality of 4 × 6 rows of works W are stacked and held. Four vacuum cups 16 of the workpiece loading mechanism 12 are provided in a linear arrangement corresponding to the number of the lower molds 22 of each inspection stage 11.
[0013]
The workpiece loading mechanism 12 sucks four workpieces W on the workpiece container 17 of the container elevating mechanism 14 by the vacuum cup 16 of the horizontal articulated robot 13, and the four workpieces W at the loading / unloading position A of the loading position A. It is conveyed onto the lower mold 22. The feed screw mechanism 19 of the container elevating mechanism 14 drives the mounting table 18 up and down so that the removal height of the workpiece W is constant.
[0014]
At the take-out position D, a workpiece separating / taking-out mechanism 30 is provided. The workpiece separating / extracting mechanism 30 includes a guide rail 31 that is pushed out to the attachment / detachment position at the extraction position D and parallel to the direction in which the lower molds 22 are linearly arranged, and is linearly supported on the guide rail 31 so as to be freely reciprocally linearly movable. A moving body 32, an elevating body 33 supported by the linearly moving body 32 so as to be movable up and down, and a horizontal moving body 34 supported on the elevating body 33 so as to be movable in a direction perpendicular to the guide rail 31 are provided. Four vacuum cups 35 arranged in a straight line parallel to the guide rail 31 corresponding to the four lower molds 22 are provided at the tip of the moving body 34. Accordingly, the vacuum cup 35 can be moved in the direction in which the plurality of lower molds 22 are arranged at the take-out position D, the direction perpendicular to the direction in which the lower molds 22 are arranged, and the vertical direction by an actuator (not shown) of each moving body.
[0015]
A defective product container 36 and a non-defective product container 37 are provided on the side portion of the guide rail 31 in different positions in the moving direction of the rectilinear moving body 32. The defective container 36 is a simple box, while the non-defective container 37 is formed by arranging a plurality of storage cylinders 39 arranged in a straight line corresponding to the guide rail 31 and the vacuum cup 35 on the substrate 38. ing. The inner diameter of the storage cylinder 39 corresponds to the outer diameter of the workpiece W. In this example, 8 × 2 rows are provided on the substrate 38.
[0016]
The apparatus having the above-described configuration operates as follows. At the loading position A of the rotary table 10, the workpiece W is set on the four lower molds 22 at the mounting / demounting positions of the inspection stages 11 by the workpiece loading mechanism 12. Then, until the rotary table 10 rotates to the inspection position B, the four lower molds 22 (lower mold bases 22c) of each inspection stage 11 are drawn along the guide rails 24 below the four upper molds 21. . Next, the four upper molds 21 are simultaneously lowered onto the four lower molds 22 by the upper mold lifting mechanism 23, and the peripheral edge of the workpiece W is sandwiched between the sandwiching part 21a and the sandwiching part 22b. The At the inspection position B (or as soon as the upper die 21 is lowered), the on-off valve 27 is opened, and the compressed air from the compressed air source 28 is guided to the lower part of the workpiece W through the compressed air introduction path 26 so that the workpiece W is It deforms in the deformation space 21b. The on-off valve 27 is closed when a certain amount of compressed air is fed.
[0017]
In this state, the workpiece W is hermetically sandwiched between the upper die 21 and the lower die 22 by the sandwiching portions 21b and 22b to form a closed chamber. Therefore, if the workpiece W is a non-defective product (OK product), the pressure drop detected by the pressure detector 29 does not occur (or falls within an allowable value). On the other hand, if it is a defective product (NG product), a pressure drop exceeding the allowable value occurs, so the pressure detector 29 can detect this. The above inspection is performed until the rotary table 10 reaches the inspection position C after the compressed air is supplied to the workpiece W.
[0018]
When the rotary table 10 reaches the take-out position D, the four upper molds 21 are raised with respect to the lower mold 22 by the upper mold lifting mechanism 23, and the four lower molds of each inspection stage 11 along the guide rail 24. 22 is moved to an attaching / detaching position radially outward of the turntable 10.
[0019]
At the take-out position D, based on the inspection result transmitted to the work separating and taking-out mechanism 30 and the state of storage of the work W in the storage cylinder 39 of the non-defective container 37, the rectilinear moving body 32, the elevating body 33, the horizontal moving body 34 and the vacuum cup 35 are driven. In the above example, when the workpiece W is a non-defective product, the four vacuum cups 35 are simultaneously lowered onto the four lower molds 22 by the elevating body 33, and the workpiece W is sucked and raised by the vacuum pressure. The vacuum cup 35 is then moved in the direction of the non-defective container 37 by the rectilinear moving body 32, and when the vacuum cup 35 reaches above the four rows of storage cylinders 39 of the 8 × 2 rows of storage cylinders 39, the vacuum cup 35 The vacuum pressure is released and the work W is dropped into the storage cylinder 39. At this time, the elevating body 33 may be lowered. This operation is continued until a predetermined number of workpieces W (for example, 10 rotary tables) are stored in the storage cylinder 39.
[0020]
Since the storage cylinders 39 of the non-defective container 37 are 8 × 2 rows in the illustrated example, four planar movement positions of the four vacuum cups 35 with respect to the non-defective container 37 are set. When the work W is stored in the four storage cylinders 39 at any one of the four movement positions, the movement position of the vacuum cup 35 is changed, and the work W is stored in all the storage cylinders 39. To do. When the work W is stored in all the storage cylinders 39 of one good product container 37, the good product container 37 is replaced. The movement position of the vacuum cup 35 can be changed by changing the movement positions of the rectilinear moving body 32 and the horizontal moving body 34 in the illustrated example, but the movement position of the vacuum cup 35 is not changed, and the position of the non-defective container 37 is changed. Even if it is changed, it is the same.
[0021]
On the other hand, when the workpiece W is defective (when at least one of the workpieces W on the four lower molds 22 of each inspection stage 11 is defective), the vacuum cup 35 is lowered onto the lower mold 22. After the workpiece W is sucked and raised by the vacuum pressure, the rectilinear moving body 32 moves to the position of the defective container 36 and releases the holding of the workpiece W there. Depending on whether the workpiece W is a non-defective product or not, the above operation is performed to separate the non-defective product from the defective product. In particular, since the non-defective product is stored in the storage cylinder 39 of the non-defective container 37, the non-defective container 37 having the storage cylinder 39 (or only the storage cylinder 39 separated from the non-defective container 37) can be used as it is for transportation. The work of repacking good products can be omitted.
[0022]
The present embodiment is intended to inspect a larger number of workpieces W at the same time. For this reason, it is preferable that the intermittent rotation angle of the rotary table 10 is large, but if it is 120 °, the lower mold of the adjacent inspection stage 11 is used. Since there is a possibility that the table 22c interferes, it is practical to set it to 90 °. In addition, the number of inspection dies 20 of each inspection stage 11 is preferably 4 or more.
[0023]
【The invention's effect】
According to the apparatus of the present invention, it is possible to automatically inspect the leakage of the diaphragm and separate and take out the non-defective product and the defective product, thereby improving the inspection efficiency.
[Brief description of the drawings]
FIG. 1 is an overall plan view showing an embodiment of a diaphragm leakage inspection apparatus according to the present invention.
FIG. 2 is a perspective view of a supply side of the subject diaphragm.
FIG. 3 is a perspective view of the extraction side of the subject diaphragm.
FIG. 4 is a cross-sectional view showing a state in which each inspection mold is opened.
FIG. 5 is a cross-sectional view showing an inspection state in which the inspection mold is closed.
[Explanation of symbols]
W workpiece (diaphragm to be tested)
A Loading position B C Inspection position D Extraction position 10 Rotary table 11 Inspection stage 12 Work loading mechanism (examination diaphragm loading mechanism)
13 Horizontal articulated robot 14 Container elevating mechanism 17 Work container 18 Placement table 20 Inspection mold 21 Upper mold 21a Clamping part 21b Deformation space 22 Lower mold 22a Unevenness 22b Clamping part 23 Upper mold lifting mechanism 24 Guide rail 26 Compressed air introduction Path 27 On-off valve 28 Compressed air source 29 Pressure detector (pressure drop detector)
30 Workpiece separation / extraction mechanism (examination diaphragm separation / extraction mechanism)
31 Guide rail 32 Straight moving body 33 Lifting body 34 Horizontal moving body 35 Vacuum cup 36 Defective product container 37 Non-defective product container 38 Substrate 39 Storage cylinder

Claims (4)

Rotary table that is intermittently rotated at equal angles;
A plurality of inspection stage inspection stages arranged circumferentially at an angular interval of intermittent rotation on the rotary table, the rotary table having at least a loading position, an inspection position and an extraction position of each inspection stage in the order of the rotation direction;
Each of the inspection stages has a pair of upper and lower molds, and has three or more inspection molds arranged in a straight line perpendicular to the radial direction of the rotary table. Having an upper mold and a lower mold that sandwich the peripheral edge of the subject diaphragm and form a deformation space in the center;
Upper mold lifting mechanism that lifts and lowers the upper molds of each inspection stage;
When the upper mold of the same inspection stage of the rotary table is raised, the lower mold of each of the plurality of inspection molds of each inspection stage is between the lower position of the upper mold and the mounting / dismounting position radially outward of the rotary table. Lower type advance / retreat mechanism to advance and retract with
A test diaphragm loading mechanism for supplying a test diaphragm onto the plurality of lower molds when each inspection stage is in the loading position and the plurality of lower molds are in the attaching / detaching position;
A plurality of lower molds of each inspection stage equipped with the diaphragm to be tested are moved to a lower position of the plurality of upper molds by the lower mold advancing / retreating mechanism, and a plurality of the inspection stages of the inspection stage are moved by the upper mold lifting mechanism. A leak inspection mechanism for inspecting leaks by applying air pressure to the diaphragm to be tested between the lower mold and the upper mold on the inspection stage at the inspection position where the upper mold is lowered onto the lower mold;
When each inspection stage is in the take-out position and the plurality of lower molds are in the attachment / detachment position, the vacuum cup has a plurality of linearly arranged vacuum cups that adsorb the test diaphragms on the plurality of lower molds. The diaphragm separation / extraction mechanism to be tested is divided into a non-defective product and a non-defective product by moving the vacuum cup to different positions according to whether the inspection result by the leakage inspection mechanism is a non-defective product or a non-defective product.
A diaphragm leak inspection device with a The leak inspection apparatus according to claim 1, wherein the angular interval of intermittent rotation is 90 °, and there are four or more inspection molds on one inspection stage. 3. The leak inspection apparatus according to claim 1, wherein the leak inspection mechanism includes a sandwiched portion at the periphery of the diaphragm to be tested formed in each of the upper mold and the lower mold; and compressed air formed in one of the upper mold and the lower mold. The deformation space formed on the other of the upper mold and the lower mold, allowing the test diaphragm to be deformed by the introduction path and the compressed air introduced from the compressed air introduction path; and the test diaphragm is deformed by the compressed air And a pressure detector for detecting a pressure drop in a chamber formed by the diaphragm to be tested. 4. The leak inspection apparatus according to claim 1, further comprising a non-defective container having a plurality of storage cylinders arranged in a straight line for storing the test diaphragms in a stacked manner, and separating and taking out the test diaphragms. The mechanism is a diaphragm leakage inspection device for storing a diaphragm to be tested in a plurality of storage cylinders of a non-defective container when the inspection result is a non-defective product.

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