JP5673093B2 - Leak inspection apparatus and leak inspection method - Google Patents

Description

  The present invention relates to a leak inspection apparatus and a leak inspection method for inspecting the airtightness of an internal space of an inspection object such as a transmission case.

  Air is filled into the inner space of a hollow workpiece (inspection object) such as a transmission case that requires airtightness, and the air pressure drop is measured to check for air leakage and the amount of air leakage. A leak inspection is being performed. In this leak inspection, it is necessary to simultaneously seal (mask) a plurality of openings provided on the outer surface of the workpiece. And the opening part of a workpiece | work is often provided in the surface of several directions, and a dimension, a shape, and a position differ for every specification (type) of a workpiece | work. Therefore, in a leak inspection apparatus that performs such a leak inspection, the apparatus itself has conventionally been a dedicated apparatus for each workpiece specification, and does not support the specifications of a plurality of workpieces.

  In addition, in a leak inspection system that immerses engine parts in a dip tank, different types of masking members are fixed at four locations on the outer side of a rotatable drum so as to correspond to openings in one direction of the workpiece. There is a rotated masking mechanism. In this rotary masking mechanism, the opening of the workpiece is sealed by a masking member that is adapted to the type of workpiece as the rotary drum rotates. However, there is a possibility that it cannot be handled depending on the type of workpiece such as a workpiece having openings in two or more directions, or cannot be handled depending on the direction of the opening. Further, the installation of the rotating drum increases the size of the apparatus.

  Here, Patent Document 1 discloses a leak inspection apparatus (leak inspection apparatus) provided with a plurality of masking units in order to seal each of the openings on each surface of an inspection object having openings on a plurality of surfaces. Has been.

JP 2005-337906 A

  However, in the leak inspection apparatus disclosed in Patent Document 1, if the workpiece specifications (types) are different, it is necessary to individually replace a plurality of masking units.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a leak inspection apparatus and a leak inspection method capable of performing a leak inspection of inspection objects having various specifications while reducing the number of work steps. To do.

One aspect of the present invention made to solve the above problems is a leak inspection apparatus for inspecting the airtightness of the internal space of an object to be inspected. A plurality of masking jigs for sealing the opening of the object to be inspected are mutually connected. The plurality of masking jigs having a jig changing mechanism for disassembling an integrated jig assembly by coupling and holding each of the plurality of masking jigs, and gripping by the jig changing mechanism A leak test is performed after the opening is sealed.

  According to this aspect, by introducing a jig assembly in which a plurality of masking jigs are assembled into the apparatus, it is possible to perform a leak inspection while sealing the opening of the inspection object. Therefore, it is not necessary to individually arrange a plurality of masking jigs in the apparatus, so that the number of work steps can be reduced. Further, since the jig assembly in which a plurality of masking jigs are assembled is easy to move and store, the number of work steps can be reduced.

  Further, it is possible to perform a leak inspection on an inspection object having various specifications simply by changing the specifications of the masking jig constituting the jig assembly. Therefore, the leak inspection apparatus can be provided with versatility, and the inspection cost can be reduced.

  Further, since it is not necessary to prepare masking jigs of various specifications in the apparatus in advance in order to deal with inspected objects of various specifications, the apparatus can be miniaturized.

  In the said aspect, it is preferable that the said masking jig | tool is a plate-shaped jig | tool provided with the axial-shaped masking shaft which provided the masking part which seals the said opening part in the front-end | tip.

  According to this aspect, since the masking jig is a plate-shaped jig, the masking jig can be easily held by the jig changing mechanism, and the masking jig can be easily handled. Therefore, the jig changing mechanism can be a simple device configuration.

  Moreover, since a plurality of masking shafts can be integrated into one masking jig, the apparatus can be further miniaturized.

  In the said aspect, it is preferable that the said jig | tool assembly is a hexahedron where each surface was comprised with the said masking jig.

  According to this aspect, the openings on the six surfaces of the upper surface, the lower surface, the right side surface, the left side surface, the front surface, and the rear surface of the inspection object can be reliably sealed with the masking jig. In addition, since the jig assembly can be easily handled, such as carrying the jig assembly easily, the number of work steps can be further reduced.

  In the above aspect, it is preferable that the jig changing mechanism forms the jig assembly by assembling the plurality of masking jigs to be respectively held.

  According to this aspect, the jig assembly can be disassembled and assembled by the jig changing mechanism. Therefore, the operator can perform the leak inspection simply by putting the jig assembly into the apparatus, and only needs to take out the jig assembly from the apparatus after the leak inspection is completed. Therefore, the number of work steps can be further reduced.

  In the above aspect, it is preferable that the plurality of masking jigs are positioned with respect to each other by a knock pin.

  According to this aspect, it becomes easy to assemble a plurality of masking jigs to form a jig assembly.

Another aspect of the present invention made to solve the above problems is a leak inspection method for inspecting the airtightness of the internal space of an inspection object, wherein a plurality of masking jigs for sealing the opening of the inspection object are provided. By disassembling the jig assembly integrated with each other and performing a jig changing operation for individually holding the plurality of masking jigs, the plurality of masking jigs gripped by the jig changing operation are performed. Leak inspection is performed with the opening sealed with a tool.

  According to the leak inspection apparatus and the leak inspection method according to the present invention, it is possible to perform a leak inspection of inspection objects having various specifications while reducing the number of work steps.

It is a front view of a leak inspection apparatus. It is an AA arrow line view of FIG. It is a top view of a leak inspection apparatus. It is an external appearance perspective view of a masking box. It is sectional drawing of the periphery of a front jig plate and a back jig plate. It is an exploded view of a masking box. It is a figure which shows the state which the masking box was conveyed by the setup change position, and stopped in setup change operation | movement. It is a figure which shows the state which the upper jig | tool unit hold | gripped the upper jig | tool plate in change-over operation. It is a figure which shows the state which the right jig | tool unit hold | gripped the right jig | tool plate and the left jig | tool unit hold | gripped the left jig | tool plate in change-over operation. It is a figure which shows the state by which the lower jig | tool plate was cut | disconnected from the right jig | tool plate, the left jig | tool plate, the front jig | tool plate, and the rear jig | tool plate in change-over operation. It is a figure showing the state where the upper jig plate was separated from the right jig plate and the left jig plate in the changeover operation. In a leak inspection operation | movement, it is a figure which shows the state which the lower jig | tool plate which attached the workpiece | work was conveyed and stopped at the leak inspection position. In the leak inspection operation, the upper jig plate comes into contact with the workpiece, and the opening on the upper jig plate side of the workpiece and the opening on the lower jig plate side of the workpiece are sealed. is there. It is a figure which shows the state which the masking operation was completed in leak test | inspection operation | movement.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Description of Leak Inspection System]
FIG. 1 is a front view of a leak inspection apparatus 1 according to the present embodiment. As shown in FIG. 1, the leak inspection apparatus 1 includes a masking box 10, an upper jig unit 12, an upper jig up / down cylinder 14, an upper jig clamping cylinder 16, a right jig unit 18, and a right jig front and rear. The cylinder 20 includes a left jig unit 22, a left jig front / rear cylinder 24, a transfer roller 26, a lower jig up / down cylinder 28, a lower jig positioning knock pin 32, a leak measurement unit 34, an operation panel 36, and the like.

  The masking box 10 includes a lower jig plate 38, a right jig plate 40, a left jig plate 42, an upper jig plate 44, a front jig plate 46, a rear jig plate 48 (see FIG. 4), and the like. 1 shows a state in which each jig plate is disassembled. The front jig plate 46 and the rear jig plate 48 are attached to and integrated with the upper jig plate 44 by bolts 49 (see FIG. 4). The lower jig plate 38, the right jig plate 40, the left jig plate 42, the upper jig plate 44, the front jig plate 46, and the rear jig plate 48 are examples of the “masking jig” in the present invention. is there. Details of the masking box 10 will be described later.

  Moreover, FIG. 2 is an AA arrow view of FIG. As shown in FIG. 2, the leak inspection apparatus 1 includes a plate pull-in slide unit 50, a stopper 52, a right jig clamp cylinder 54, a left jig clamp cylinder 56, and the like. The leak inspection apparatus 1 is also provided with a masking box insertion position 58 (work attachment position 60) and a changeover position 62 (leak inspection position 64).

  FIG. 3 is a top view of the leak inspection apparatus 1 of the present embodiment. As shown in FIG. 3, the leak inspection apparatus 1 includes a front masking cylinder 66, a rear masking cylinder 68, and the like.

  Each jig unit such as the upper jig unit 12, the right jig unit 18, and the left jig unit 22, a conveyance unit such as the conveyance roller 26 and the plate pulling slide unit 50, the upper jig upper / lower cylinder 14, Upper jig clamping cylinder 16, right jig front / rear cylinder 20, left jig front / rear cylinder 24, lower jig upper / lower cylinder 28, right jig clamping cylinder 54, left jig clamping cylinder 56, front masking Each of the cylinders such as the cylinder 66 and the rear masking cylinder 68 is an example of an element constituting the “jig change mechanism” in the present invention.

[Description of masking box]
FIG. 4 is an external perspective view of the masking box 10. As shown in FIG. 4, the masking box 10 is formed in a hexahedron, and a lower jig plate 38, a right jig plate 40, a left jig plate 42, an upper jig plate 44, a front jig plate 46, A plate-shaped jig such as a rear jig plate 48 is provided. The masking box 10 is an example of the “jig assembly” in the present invention.

  An O-ring 72 is sealed in the lower jig plate 38 and the upper jig plate 44 to seal the openings on the upper and lower surfaces of the work 70. In addition, not only the O-ring 72 but other soft materials such as packing may be embedded.

  The lower jig plate 38 is provided with a lower core 71, and the upper jig plate 44 is provided with an upper core 73. The lower core 71 and the upper core 73 are made of the same material as that of the lower jig plate 38 and the upper jig plate 44. By reducing the internal volume of the work 70 in a leak test described later, It is provided to reduce the amount of air injected into the interior. Further, by reducing the amount of air injected into the work 70 in this way, it is possible to improve the inspection accuracy and shorten the inspection time in the leak inspection. Depending on the specifications of the workpiece 70, only one of the lower core 71 and the upper core 73 may be provided, or the lower core 71 and the upper core 73 may not be provided. The lower core 71 and the upper core 73 are formed in positions and shapes that do not interfere with each other when the opening of the work 70 is sealed. In FIG. 1 and the drawings described later, the lower core 71 and the upper core 73 are appropriately omitted for convenience of explanation.

  A masking shaft 74 is fixed to the right jig plate 40 and the left jig plate 42, and a masking rubber 76 is provided at the tip of the masking shaft 74. The masking rubber 76 is for sealing the openings on the left and right sides of the workpiece 70, and may be a soft material other than rubber. The masking rubber 76 is an example of the “masking part” in the present invention.

  As shown in FIG. 5, a masking shaft 78 is provided on the front jig plate 46 and the rear jig plate 48 so as to be slidable in the axial direction with respect to the guide bush 80. A masking rubber 82 is provided at the tip of the masking shaft 78. The masking rubber 82 is for sealing the openings on the front side surface and the rear side surface of the workpiece 70, and may be a soft material other than rubber. A spring 84 is provided between the rear end of the masking shaft 78 and the guide bush 80. Further, the rear end of the masking shaft 78 is pushed by the plate 85, and the masking shaft 78 slides. The driving force of the front masking cylinder 66 and the rear masking cylinder 68 is transmitted to the plate 85. The masking rubber 82 is an example of the “masking part” in the present invention. FIG. 5 is a cross-sectional view around the front jig plate 46 and the rear jig plate 48.

  As shown in FIG. 6, each jig plate is provided with a knock hole 86 and a knock pin 88 for positioning. The right jig plate 40 and the left jig plate 42 are coupled to the lower jig plate 38 in the vertical direction via the knock holes 86 and the knock pins 88. FIG. 6 is an exploded view of the masking box 10.

  A front jig plate 46 and a rear jig plate 48 are fixed to the upper jig plate 44 with bolts 49 or the like in the vertical direction. The upper jig plate 44 in a state where the front jig plate 46 and the rear jig plate 48 are fixed is coupled to the lower jig plate 38 via a knock hole 86 and a knock pin 88. At the same time, the upper jig plate 44 is coupled to the right jig plate 40 and the left jig plate 42 via the knock holes 86 and the knock pins 88. Further, the upper jig plate 44 is provided with an air supply port 90 for enclosing air necessary for leak inspection.

  As described above, the masking box 10 according to the present embodiment integrates the masking members such as the masking shafts 74 and 78 and the masking rubbers 76 and 82 on each jig plate, and connects the jig plates to each other. It can be shaped. The integral box-shaped masking box 10 can be easily disassembled into jig plates. Therefore, it is possible to facilitate the movement of each jig plate during replacement, the introduction into the leak inspection apparatus 1 and the storage. In addition, such a masking box 10 corresponds to various specifications (types) of the workpiece 70 by preparing a specification corresponding to each specification (type) of the workpiece 70 to be subjected to the leak inspection. Leak inspection can be performed.

  In addition, by reducing the thickness of each jig plate while increasing the thickness of each jig unit, the durability of each jig plate and each jig unit in leak inspection is reduced while reducing the weight of the masking box 10. Can be secured.

[Description of changeover operation]
Next, the changeover operation will be described. Here, the change-over operation is an operation of exchanging the specifications of each jig plate held (held) by the leak inspection apparatus 1. First, the masking box 10 is arranged on the transfer roller 26 at the masking box insertion position 58 (see FIG. 2) of the leak inspection apparatus 1, and a changeover start switch (not shown) on the operation panel 36 is turned ON. Then, the masking box 10 is conveyed to the step change position 62 by the plate pulling slide unit 50, and is positioned by the stopper 52 and stopped as shown in FIG. FIG. 7 is a view showing a state where the masking box 10 is transported to the change position 62 and stopped in the change operation, and is a view of the leak inspection apparatus 1 seen from the same position as in FIG. .

  Next, the upper jig unit 12 is lowered by driving the upper jig up / down cylinder 14. Then, a knock pin (not shown) of the upper jig unit 12 is inserted into an upper jig positioning knock hole 94 (see FIG. 4) provided in the upper jig plate 44, and the upper jig unit 12 is inserted into the upper jig plate. Stop while positioning with respect to 44. Then, the upper jig plate 44 is held by the upper jig clamping cylinder 16 fixed to the upper jig unit 12. As a result, the state shown in FIG. 8 is obtained. FIG. 8 is a diagram showing a state in which the upper jig unit 12 grips the upper jig plate 44 in the changeover operation, and is a view of the leak inspection apparatus 1 as seen from the front.

  Next, the right jig unit 18 moves forward (moves toward the right jig plate 40) by driving the right jig front / rear cylinder 20. Then, a knock pin (not shown) of the right jig unit 18 is inserted into a right jig positioning knock hole 98 (see FIG. 4) provided in the right jig plate 40 of the masking box 10, and the right jig unit 18 is inserted. Stop while positioning with respect to the right jig plate 40. Next, the right jig plate 40 is held by the right jig clamping cylinder 54 provided in the right jig unit 18.

  Further, the left jig unit 22 moves forward (moves toward the left jig plate 42) by driving the left jig front / rear cylinder 24. Then, a knock pin (not shown) of the left jig unit 22 is inserted into a left jig positioning knock hole (not shown) provided in the left jig plate 42 of the masking box 10, and the left jig unit 22 is left-handed. Stops while being positioned with respect to the tool plate 42. Next, the left jig plate 42 is held by the left jig clamping cylinder 56 provided in the left jig unit 22. As a result, the state shown in FIG. 9 is obtained. 9 is a diagram showing a state in which the right jig unit 18 grips the right jig plate 40 and the left jig unit 22 grips the left jig plate 42 in the changeover operation, and FIG. It is the figure which looked at the leak test | inspection apparatus 1 from the same position.

  Next, the conveying roller 26 is lowered by driving the lower jig up / down cylinder 28. As a result, the lower jig plate 38 is lowered, and the lower jig positioning knock pin 32 is inserted into the lower jig positioning knock hole 30 and stopped. Accordingly, the lower jig plate 38 is separated from the right jig plate 40, the left jig plate 42, the front jig plate 46, and the rear jig plate 48 (see FIG. 4). As a result, the state shown in FIG. 10 is obtained. FIG. 10 is a diagram showing a state where the lower jig plate 38 is separated from the right jig plate 40, the left jig plate 42, the front jig plate 46, and the rear jig plate 48 in the changeover operation. It is the figure which looked at the leak test | inspection apparatus 1 from the front.

  Next, the upper jig unit 12 moves up by driving the upper jig up / down cylinder 14 and stops at the upper end. As a result, the upper jig plate 44 held by the upper jig clamping cylinder 16 of the upper jig unit 12 is separated from the right jig plate 40 and the left jig plate 42. Note that the front jig plate 46 and the rear jig plate 48 (see FIG. 4) fixed to the upper jig plate 44 with bolts 49 also rise together with the upper jig plate 44 and stop at the upper end. As a result, the state shown in FIG. 11 is obtained. FIG. 11 is a diagram showing a state in which the upper jig plate 44 is separated from the right jig plate 40 and the left jig plate 42 in the changeover operation, and is a view of the leak inspection apparatus 1 as seen from the front. is there.

  Next, the right jig unit 18 moves backward by driving the right jig front / rear cylinder 20, whereby the right jig unit 18 is held by the right jig clamping cylinder 54 (see FIG. 9) provided in the right jig unit 18. The jig plate 40 moves backward. Further, the left jig unit 22 is retracted by driving the left jig front / rear cylinder 24, so that the left jig clamped by the left jig clamping cylinder 56 (see FIG. 9) provided in the left jig unit 22 is performed. The tool plate 42 moves backward. Then, the lower jig plate 38 moves up by driving the lower jig up / down cylinder 28 and returns to the step change position 62 (see FIG. 2). As a result, the state shown in FIGS. 1 and 2 is obtained.

  Next, the lower jig plate 38 returns to the masking box insertion position 58 (see FIG. 2) by driving the plate retracting slide unit 50. Thus, the changeover operation is completed.

  As described above, when the masking box 10 is loaded (placed) at the masking box loading position 58 of the leak inspection apparatus 1, the leak inspection apparatus 1 automatically disassembles and holds each jig plate constituting the masking box 10. When the masking box 10 is retrieved from the leak inspection apparatus 1, a plurality of masking jigs each held by a jig changing mechanism such as a jig unit or a cylinder by performing an operation reverse to the above-described setting change operation. Are assembled to form the masking box 10. In this way, the leak inspection apparatus 1 can automatically perform a change-over operation (detachment operation) of the masking box 10.

[Explanation of leak inspection operation]
Next, the leak inspection operation will be described. First, the work 70 is mounted on the lower jig plate 38 in a state where the lower jig plate 38 is at the work mounting position 60 (masking box loading position 58, see FIG. 12). At this time, the workpiece 70 is positioned relative to the lower jig plate 38 by inserting a workpiece positioning knock pin (not shown) provided in the lower jig plate 38 into a knock hole (not shown) provided in the work 70. Keep going.

  Next, the start switch for leak inspection on the operation panel 36 (see FIG. 1) is turned ON. Then, the lower jig plate 38 to which the work 70 is attached is conveyed by driving the plate pulling slide unit 50 and stopped at the leak inspection position 64 (the change position 62) while being positioned by the stopper 52. As a result, the state shown in FIG. 12 is obtained. FIG. 12 is a view showing a state where the lower jig plate 38 to which the work 70 is attached is conveyed and stopped at the leak inspection position 64 in the leak inspection operation, and the leak inspection is performed from the same position as in FIG. FIG. 2 is a view of the device 1.

  Next, the conveying roller 26 is lowered by driving the lower jig up / down cylinder 28, the lower jig plate 38 to which the work 70 is attached is lowered, and the lower jig positioning knock pin 32 is inserted into the lower jig positioning knock hole 30. Is inserted and stopped.

  Next, the upper jig unit 12 is lowered by driving the upper jig up / down cylinder 14, the upper jig plate 44 is brought into contact with the workpiece 70, and is further lowered to lower the lower jig plate 38 and the upper jig plate. The opening part of the work 70 is sealed while crushing a soft material such as an O-ring 72 (see FIG. 4) embedded in each of the parts 44 and 44. As a result, the state shown in FIG. 13 is obtained. 13 shows that the upper jig plate 44 comes into contact with the workpiece 70 in the leak inspection operation, and the opening on the upper jig plate 44 side of the work 70 and the opening on the lower jig plate 38 side of the work 70 are shown. It is the figure which shows the state which sealed the part, and is the figure which looked at the leak test | inspection apparatus 1 from the front.

  Next, driving force is transmitted to the masking shaft 78 (see FIG. 5) provided on the front jig plate 46 through the plate 85 by driving the front masking cylinder 66 (see FIG. 3), and the masking shaft 78 is spring-loaded. 84 (see FIG. 5) is moved toward the work 70 while being compressed, and the opening of the work 70 is sealed by the masking rubber 82 (see FIG. 5). Similarly, the driving force is transmitted to the masking shaft 78 provided on the rear jig plate 48 (see FIG. 5) via the plate 85 by driving the rear masking cylinder 68 (see FIG. 3). Moves toward the workpiece 70 while pressing and contracting the spring 84, and the opening of the workpiece 70 is sealed by the masking rubber 82.

  Further, the right jig plate 40 moves forward (moves toward the work 70) by driving the right jig front / rear cylinder 20, and the opening of the work 70 is sealed by the masking rubber 76 of the masking shaft 74 while the spring 77 is compressed. To do. Further, the left jig plate 42 moves forward (moves toward the work 70) by driving the left jig front / rear cylinder 24, and the opening of the work 70 is sealed by the masking rubber 76 of the masking shaft 74 while the spring 77 is compressed. To do. Thereby, the masking operation is completed as shown in FIG. FIG. 14 is a view showing a state in which the masking operation is completed in the leak inspection operation, and is a view of the leak inspection apparatus 1 as seen from the front.

  Next, air is sealed into the work 70 from the air supply port 90 (see FIG. 4), and a leak test is performed to check for air leakage from the work 70. When the leak inspection is completed, each jig plate is retracted from the workpiece 70 by the reverse operation to the above. Next, when the conveying roller 26 is raised by driving the lower jig up / down cylinder 28, the work 70 is raised together with the lower jig plate 38, and the lower jig positioning knock pin 32 is moved from the lower jig positioning knock hole 30. Exit. Then, the lower jig plate 38 to which the work 70 is attached is conveyed to the work attachment position 60 (see FIG. 12) by the plate pulling slide unit 50 and stopped. Thus, the leak inspection operation ends.

  Then, when performing a leak inspection of the workpiece 70 having different specifications of the position and shape of the opening, the masking box 10 currently held by the leak inspection apparatus 1 is taken out by an operation reverse to the above change operation, After the masking box 10 having a different specification is inserted into the leak inspection apparatus 1 and the changeover operation is performed, the leak inspection is performed.

[Effect of this embodiment]
According to this embodiment, the jig set-up such as a jig unit or a cylinder that holds each of the plurality of jig plates by disassembling the masking box 10 in which a plurality of jig plates that seal the openings of the work 70 are assembled is disassembled. It has a mechanism. Therefore, the leak inspection can be performed by sealing the opening of the work 70 simply by inserting the masking box 10 into the leak inspection apparatus 1. For this reason, it is not necessary to individually arrange a plurality of jig plates inside the leak inspection apparatus 1 (for changeover work), and therefore the number of work steps can be reduced. Further, the time required for the changeover operation is reduced, and the equipment stop time during the changeover operation is reduced, so that productivity can be improved.

  In addition, since the plurality of masking boxes 10 can be easily moved and stored, the number of work steps can be reduced. Further, the leak inspection can be performed on the workpiece 70 having various specifications simply by changing the specification of the jig plate constituting the masking box 10. Therefore, since the leak inspection apparatus 1 can be provided with versatility, the inspection cost can be reduced. Further, since it is not necessary to prepare jig plates with various specifications in the leak inspection apparatus 1 in advance in order to cope with workpieces 70 with various specifications, the leak inspection apparatus 1 can be downsized. .

  Further, since the jig plate is a plate-shaped jig, the jig plate can be easily held by the jig unit, and the jig plate can be easily handled. Therefore, the jig changing mechanism can be a simple device configuration. Further, since the plurality of masking shafts 74 and 78 can be integrated into one jig plate, the leak inspection apparatus 1 can be further reduced in size.

  Further, since the masking box 10 is a hexahedron having each surface constituted by a jig plate, the openings on the six surfaces of the upper surface, the lower surface, the right side surface, the left side surface, the front surface, and the rear surface of the work 70 are reliably secured by the jig plate. Can be sealed. In addition, since the masking box 10 can be easily handled, such as carrying the masking box 10 easily, the number of work steps can be further reduced.

  The masking box 10 can be disassembled and assembled by a jig changing mechanism such as a jig unit or a cylinder. Therefore, the operator can perform the leak inspection simply by inserting the masking box 10 into the leak inspection apparatus 1, and only takes out the masking box 10 from the leak inspection apparatus 1 after the leak inspection is completed. Good. Therefore, the number of work steps can be further reduced.

  Further, since the plurality of jig plates are positioned by the knock holes 86 and the knock pins 88, it becomes easy to assemble the plurality of jig plates to form the masking box 10.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Leak inspection apparatus 10 Masking box 12 Upper jig unit 14 Upper jig upper / lower cylinder 16 Upper jig clamping cylinder 18 Right jig unit 20 Right jig front / rear cylinder 22 Left jig unit 24 Left jig front / rear cylinder 28 Lower jig upper and lower cylinders 38 Lower jig plate 40 Right jig plate 42 Left jig plate 44 Upper jig plate 46 Front jig plate 48 Rear jig plate 54 Right jig clamp cylinder 56 For left jig clamp Cylinder 58 Masking box insertion position 60 Work mounting position 62 Step change position 64 Leak inspection position 66 Front masking cylinder 68 Rear masking cylinder 70 Work 74 Masking shaft 76 Masking rubber 78 Masking shaft 82 Masking rubber 86 Knock hole 88 Knock pin N

Claims (6)

In the leak inspection device that inspects the airtightness of the internal space of the inspection object,
A plurality of masking jigs for sealing the openings of the object to be inspected are connected to each other to disassemble the integrated jig assembly and to hold the plurality of masking jigs. And
Performing leak inspection after sealing the opening with the plurality of masking jigs gripped by the jig changing mechanism;
Leak inspection device characterized by. The leak inspection apparatus according to claim 1,
The masking jig is a plate-shaped jig provided with an axial-shaped masking shaft provided with a masking portion for sealing the opening at the tip;
Leak inspection device characterized by. The leak inspection apparatus according to claim 2,
The jig assembly is a hexahedron in which each surface is constituted by the masking jig,
Leak inspection device characterized by. The leak inspection apparatus according to any one of claims 1 to 3,
The jig changing mechanism is configured to assemble the plurality of masking jigs to be gripped to form the jig assembly;
Leak inspection device characterized by. The leak inspection apparatus according to any one of claims 1 to 4,
The plurality of masking jigs are positioned by knock pins with respect to each other;
Leak inspection device characterized by. In the leak inspection method for inspecting the airtightness of the internal space of the inspection object,
A plurality of masking jigs for sealing the openings of the object to be inspected are connected to each other to disassemble the integrated jig assembly and perform a jig changing operation for gripping each of the plurality of masking jigs. Performing a leak test in a state where the opening is sealed by the plurality of masking jigs gripped by the jig changing operation;
Leak inspection method characterized by.

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