JPH11194064A - Leakage-inspecting device of diaphragm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inspect the leakage in a diaphragm, and to efficiently separate a conforming diaphragm from a non-conforming diaphragm for taking out, by deforming a diaphragm to be inspected due to compressed air, and by detecting the pressure drop of a room being created by the diaphragm to be inspected. SOLUTION: At a loading position A of a rotary table, a work W is set on four lower molds 22 being provided at a mounting/dismounting position of each inspection stage 11 by a work-loading mechanism 12. Until the rotary table is rotated to an inspection position B, the lower molds 22 are pulled into the lower part of four upper molds 21 along a guide rail 24. By an upper mold rise and fall mechanism, the upper molds 21 are allowed to fall for holding the circumferential part of the work W. Compressed air is led to the lower part of the work for deforming. When the work is a non-conforming article, pressure drop exceeding a tolerance is generated, and a pressure detector 29 detects it. Inspection should be made until the rotary table 10 reaches an inspection position C. In the case of the non-conforming article, a vacuum cap is lowered onto the lower molds 22, the work W is sucked, a straight-advance mobile body 32 is moved to the position of a container 36 of non-conforming articles, and work retention is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an apparatus for checking a diaphragm for leakage.

[0002]

2. Description of the Related Art Since a diaphragm is used for safety equipment such as a brake related to a vehicle, all the diaphragms are inspected for leaks (holes). Since it is produced in large quantities, it is of concern how to efficiently perform leak inspection and separation and removal of good and defective products.

[0003]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a leakage inspection apparatus capable of efficiently inspecting a diaphragm for leakage and separating and extracting non-defective and defective products. Another object of the present invention is to provide a device capable of efficiently transporting separated good products.

[0004]

SUMMARY OF THE INVENTION A diaphragm inspection apparatus according to the present invention includes a rotary table that is intermittently rotated by equal angles; a plurality of inspection stages arranged on the rotary table in the circumferential direction at angular intervals of intermittent rotation; Has at least a loading position, an inspection position and an unloading position of each inspection stage in the order of rotation; each inspection stage has a pair of upper and lower dies, and has a linear shape orthogonal to the radial direction of the rotary table. Each of which has an upper mold and a lower mold that sandwich the peripheral edge of the diaphragm to be inspected and form a deformed space in the center; An upper die elevating mechanism for raising and lowering the upper dies of a plurality of inspection dies of the inspection stage; the lower dies of the plurality of inspection dies of each inspection stage are each raised with the upper dies of the same inspection stage of the rotary table. A lower die reciprocating mechanism for moving back and forth between a lower position of the upper die and a radially outwardly attachable / detachable position of the rotary table; each inspection stage is at the loading position, and a plurality of lower dies are at the attach / detach position A diaphragm loading mechanism for supplying a diaphragm to be tested on the plurality of lower dies; a plurality of lower dies of each inspection stage on which the diaphragm to be tested is mounted by the tested diaphragm loading mechanism; In the inspection position where the upper die of the same inspection stage is moved to a lower position of the upper die and the upper die of the same inspection stage is lowered on the lower die by the upper die elevating mechanism, the lower die and the upper die on the same inspection stage A leak inspection mechanism for applying air pressure to the diaphragm to be inspected to check for leaks; when each inspection stage is at the take-out position and the plurality of lower dies are at the attaching / detaching position, the test diaphragms on the plurality of lower dies The vacuum cup has a plurality of vacuum cups arranged in a straight line that adsorbs the vacuum cup, and reciprocates linearly in the direction in which the vacuum cups are arranged. The vacuum cup differs depending on whether the inspection result by the leak inspection mechanism is good or defective. And a mechanism for separating and extracting a diaphragm to be inspected, which is moved to a position and divided into a non-defective product and a non-defective product.

[0005] In order to increase the number of diaphragms to be inspected at the same time, it is preferable that the intermittent rotation angle interval is 90 ° and that the number of inspection dies on one inspection stage is four or more.

[0006] Specifically, the leak inspection mechanism includes, for example, a clamped portion around the periphery of a diaphragm to be inspected formed on each of an upper mold and a lower mold; a compressed air introduction passage formed on one of the upper mold and the lower mold. The deformed space formed in the other of the upper die and the lower die, which permits the diaphragm to be deformed by the compressed air introduced from the compressed air introduction passage; and A pressure detector for detecting a pressure drop in a chamber formed by the detection diaphragm.

[0007] A non-defective container having a plurality of storage cylinders linearly arranged for storing the superposed diaphragms to be inspected is provided at a portion for receiving a non-defective product from the diaphragm to be inspected and taken out when the inspection result is a non-defective product. When the diaphragm to be inspected is stored in the plurality of storage cylinders of the passable container, it can be transported as it is after separation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary table 10 shown in FIGS. 1 to 3 is intermittently rotated by an equal angle (90 ° in the illustrated embodiment), and the inspection stage 11 is rotated at an equal angular interval equal to the intermittent rotation angle. Have. 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 die 20 includes an upper die 21 and a lower die 22. Consists of The four upper dies 21 of each inspection stage 11 are simultaneously driven up and down by an upper die lifting mechanism 23. The four lower dies 22 of each inspection stage 11 are on a lower die table 22c. The lower die table 22c is moved along a radial guide rail 24 of the rotary table 10 by a lower die moving mechanism (not shown). It is possible.

As shown in FIG. 2, the rotary table 10 has a loading position A of a workpiece (diaphragm to be inspected) W, an inspection position B,
C and the unloading position D are set, and the four lower dies 22 of each inspection stage 11 are drawn into the lower positions of the four upper dies 21 along the guide rails 24 at the loading position A, and the unloading position is set. The lower position of the upper mold 21 is maintained until the upper die 21 is pushed out by D and reaches the detachable position. On the other hand, the four lower dies 22 of the respective inspection stages 11 pushed out along the guide rails 24 at the unloading position D are next rotated at the rotation phase after the loading position A.
It is held at an outer position (detachable position) until it is pulled into a position below the upper mold 21.

On the other hand, the four lower molds 2 of each inspection stage 11
The four pairs 21 are located when the lower mold 22 of each inspection stage 11 is located below the upper mold 21, that is, the inspection stage 11 of the turntable 10 is at least in the rotational phase of the inspection positions B and C. At this time, when the four lower dies 22 of each inspection stage 11 are moved to the outer attaching / detaching position at the unloading position D and the loading position A by the upper die raising / lowering mechanism 23, the upper die raising / lowering mechanism is used. Ascends by 23 and separates from the upper mold 21.

As shown in FIGS. 4 and 5, the lower mold 22 of each inspection mold 20 has an unevenness 22a substantially matching the shape of the work W.
, And the peripheral portion is a clamping portion 22b of the work W.
A compressed air introduction passage 26 is formed at the center of the lower mold 22, and the compressed air introduction passage 26 is provided with an on-off valve 27.
, And to a pressure detector (pressure drop detector) 29. Upper mold 2
1 has a holding portion 21a for holding the peripheral portion of the work W, and a deformed space (recess) 21b 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 leak inspection mechanism.

At the loading position A, the loading mechanism 12
Is provided. This work loading mechanism 12 is shown in FIG.
As shown in FIG. 2, a horizontal articulated robot 13 and a container elevating mechanism 14 are provided. Horizontal articulated robot 13
Comprises a plurality of rotating arms 15 and a plurality of these arms 1
And a vacuum cup 16 provided at the end of the vacuum cup 5, so that the vacuum cup 16 can be moved to an arbitrary position. On the other hand, the container elevating mechanism 14 has a mounting table 18 on which a plurality of stacked work containers 17 are mounted, and a feed screw mechanism 19 for raising and lowering the mounting table 18. The work container 17 has legs 17 for overlapping each other.
In the illustrated example, a plurality of workpieces W in 4 × 6 rows are stacked and held. The vacuum cup 16 of the work loading mechanism 12 is provided with four linearly arranged vacuum cups 16 corresponding to the number of lower dies 22 of each inspection stage 11.

The work loading mechanism 12 sucks four works W on the work container 17 of the container elevating mechanism 14 by the vacuum cup 16 of the horizontal articulated robot 13, and the work W is located at the loading / unloading position of the loading position A. It is conveyed on four lower dies 22. The feed screw mechanism 19 of the container elevating mechanism 14 drives the mounting table 18 up and down so that the take-out height of the work W is constant.

At the unloading position D, the work separating and unloading mechanism 30
Is provided. The work separation / extraction mechanism 30 includes a guide rail 31 that is pushed out to an attachment / detachment position at an extraction position D and that is parallel to the direction in which the lower dies 22 are lined up in a straight line. A moving body 32, an elevating body 33 supported by the rectilinear moving body 32 so as to be able to move up and down, and a guide rail 3 on the elevating body 33
Horizontal moving body 3 movably supported in a direction orthogonal to 1
4, four vacuum cups 35 are provided at the tip of the horizontal moving body 34 so as to correspond to the four lower dies 22 and are arranged in a straight line parallel to the guide rail 31. Therefore, the vacuum cup 35 is moved by the actuator (not shown) of each moving body in a direction in which the plurality of lower dies 22 are arranged at the take-out position D,
And up and down directions.

On the side of the guide rail 31, the position of the linear moving body 32 in the moving direction is changed to
6 and a non-defective container 37 are provided. The defective container 36 is simply a box, while the non-defective container 3
Reference numeral 7 denotes a substrate 38 on which a plurality of storage cylinders 39 arranged linearly in correspondence with the guide rail 31 and the vacuum cup 35 are arranged. The inner diameter of the storage cylinder 39 corresponds to the outer diameter of the work W, and in this example, 8 × 2 rows are provided on the substrate 38.

The apparatus having the above configuration operates as follows. At the loading position A of the rotary table 10, the work W is set on the four lower dies 22 at the attachment / detachment positions of the inspection stages 11 by the work loading mechanism 12. Then
By the time the rotary table 10 is rotated to the inspection position B, the four lower dies 22 (lower dies 22c) of each inspection stage 11 are drawn below the four upper dies 21 along the guide rails 24. Next, the four lower molds 22 are moved by the upper mold elevating mechanism 23.
At the same time, the four upper dies 21 descend, and the peripheral portion of the work W is clamped between the clamping portions 21a and 22b. In the inspection position B (or immediately after the upper mold 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 work W through the compressed air introduction passage 26, and the work W is moved. It is deformed in the deformation space 21b. On-off valve 2
7 is closed when a certain amount of compressed air is sent.

In this state, the work W has its peripheral edge hermetically sandwiched between the sandwiching portions 21b and 22b of the upper mold 21 and the lower mold 22 to form a closed chamber. Therefore, if the workpiece W is a good 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, in the case of a defective product (NG product), a pressure drop exceeding an allowable value occurs, so that the pressure detector 29 can detect this. The above inspection is performed after the compressed air is supplied to the work W and before the turntable 10 reaches the inspection position C.

When the rotary table 10 reaches the take-out position D,
The four upper dies 21 are raised with respect to the lower dies 22 by the upper dies elevating mechanism 23, and the four lower dies 22 of each inspection stage 11 are moved along the guide rails 24 on the radially outer side of the rotary table 10. It is moved to the attaching / detaching position.

At the unloading position D, the inspection result transmitted to the work separation and unloading mechanism 30 and the non-defective container 3
The rectilinear moving body 32, the elevating body 33, the horizontal moving body 34, and the vacuum cup 35 are driven based on the storage state of the work W in the storage cylinder 39 of No. 7. In the above example, the work W
Is good, the four vacuum cups 35 are
3, the workpiece W is simultaneously lowered onto the four lower dies 22, and the workpiece W is sucked by the vacuum pressure to ascend. Vacuum cup 3
Next, the vacuum cup 3 is moved in the direction of the non-defective container 37 by the rectilinear moving body 32 and reaches above one of the four rows of the storage cylinders 39 of the 8 × 2 rows of the storage cylinders 39.
The vacuum pressure of 5 is released, and the work W is dropped into the storage cylinder 39. At this time, the lifting body 33 may be lowered. This operation is continued until a predetermined number (for example, ten rotary tables) of the works W are stored in the storage cylinder 39.

The storage cylinders 39 of the non-defective container 37 are 8 × 2 rows in the illustrated example.
There are four settings. When the storage of the work W in the four storage cylinders 39 at any one of the four movement positions is completed, the movement position of the vacuum cup 35 is changed, and the storage of the work W in all the storage cylinders 39 is performed. Perform All storage cylinders 39 of one good container 37
When the work W is stored in the non-defective container 37, the non-defective container 37 is replaced. Changing the moving position of the vacuum cup 35
In the illustrated example, the movement can be performed by changing the moving positions of the rectilinear moving body 32 and the horizontal moving body 34. However, the same applies even if the moving position of the vacuum cup 35 is not changed and the position of the non-defective container 37 is changed. is there.

On the other hand, when the work W is defective (when at least one of the works W on the four lower dies 22 of each inspection stage 11 is defective), the vacuum cup 35 is moved to the lower die 22. After descending upward and sucking and raising the work W by the vacuum pressure, the rectilinear moving body 32 moves to the position of the defective container 36 and releases the holding of the work W there. The above operation is performed depending on whether the work W is a non-defective product or a non-defective product, and the non-defective product and the non-defective product are separated. Especially good products,
Since the non-defective container 37 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, and the non-defective product is re-used. The operation of packing can be omitted.

The present embodiment aims at inspecting a larger number of workpieces W at the same time. Therefore, it is preferable that the intermittent rotation angle of the rotary table 10 is large. Since there is a possibility that the lower mold base 22c may interfere with the lower mold base 22c, it is practical to set the angle to 90 °. In addition, the inspection type 2 of each inspection stage 11
The number of 0s is preferably 4 or more.

[0023]

According to the apparatus of the present invention, it is possible to automatically inspect the diaphragm for leakage and to separate and extract the non-defective and non-defective products, 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 device according to the present invention.

FIG. 2 is a perspective view of a supply side of the diaphragm to be tested.

FIG. 3 is a perspective view of a side from which the diaphragm to be tested is taken out.

FIG. 4 is a sectional view showing a state in which each inspection mold is opened.

FIG. 5 is a sectional view showing an inspection state in which the inspection mold is closed.

[Explanation of symbols]

W Work (diaphragm to be inspected) A Loading position B C Inspection position D Unloading position 10 Rotary table 11 Inspection stage 12 Work loading mechanism (Diaphragm loading mechanism to be inspected) 13 Horizontal articulated robot 14 Container elevating mechanism 17 Work container 18 Mounting table Reference Signs List 20 inspection die 21 upper die 21a clamping part 21b deformation space 22 lower die 22a unevenness 22b clamping part 23 upper die elevating mechanism 24 guide rail 26 compressed air introduction path 27 on-off valve 28 compressed air source 29 pressure detector (pressure drop detection 30) Work separation / extraction mechanism (diaphragm separation / extraction mechanism to be inspected) 31 Guide rail 32 Linear moving body 33 Elevating body 34 Horizontal moving body 35 Vacuum cup 36 Defective container 37 Good container 38 Substrate 39 Storage cylinder

Claims (4)

[Claims] 1. A rotary table that is intermittently rotated by an equal angle; a plurality of inspection stages that are arranged on the rotary table in the circumferential direction at intermittent angular intervals; The inspection stage has a loading position, an inspection position, and an unloading position; each of the inspection stages has a pair of upper and lower dies, and is arranged in three straight lines orthogonal to the radial direction of the rotary table. It has the above-mentioned inspection types, and each inspection type has an upper die and a lower die which sandwich the peripheral edge of the diaphragm to be inspected and form a deformation space at the center; Upper die elevating mechanism that raises and lowers the upper die of each die. When the upper die of the same inspection stage on the rotary table is raised, the lower die of the plurality of inspection die of each inspection stage is moved downward. Lower die reciprocating mechanism for moving back and forth between the mounting position and the radially outwardly attachable / detachable position of the rotary table; when each inspection stage is at the loading position and a plurality of lower dies are at the attachable / detachment position, A diaphragm loading mechanism for supplying a diaphragm to be inspected onto the lower mold; a plurality of lower dies of each inspection stage on which the diaphragm to be inspected is mounted by the diaphragm loading mechanism are positioned below a plurality of upper dies by a lower die moving mechanism. In the inspection position where the upper molds of the same inspection stage are moved down to the lower mold by the upper mold elevating mechanism, the diaphragm to be inspected between the lower mold and the upper mold on the same inspection stage A leak inspection mechanism for inspecting a leak by applying air pressure; a plurality of suction mechanisms for adsorbing a diaphragm to be inspected on the plurality of lower dies when each inspection stage is at the take-out position and the plurality of lower dies are at the attachment / detachment position. It has a vacuum cup arranged in a line, reciprocates linearly in the arrangement direction of the vacuum cup, and moves the vacuum cup to a different position depending on whether the inspection result by the leak inspection mechanism is good or defective. A diaphragm leakage inspection device for separating a diaphragm into a defective product and a defective product. 2. The leak inspection apparatus according to claim 1, wherein
A diaphragm leak inspection device in which the angular interval of the intermittent rotation is 90 ° and the number of inspection dies on one inspection stage is four or more. 3. The leak inspection device according to claim 1, wherein the leakage inspection mechanism includes a clamping portion at a peripheral edge of a diaphragm to be inspected formed on each of the upper die and the lower die; The above-described deformed space formed in the other of the upper mold and the lower mold, which allows the test diaphragm to be deformed by the formed compressed air introduction passage and the compressed air introduced from the compressed air introduction passage; A pressure detector for detecting a pressure drop in a chamber formed by the test diaphragm after being deformed by the compressed air; 4. The leak inspection apparatus according to claim 1, further comprising a non-defective container having a plurality of storage cylinders linearly arranged for storing the diaphragms to be inspected in a stacked manner. The diaphragm to be tested
A leakage inspection device for a diaphragm that stores a diaphragm to be inspected in a plurality of storage cylinders of a non-defective container when the inspection result is a non-defective product.