JPH11194065A - Leak inspection device - Google Patents

Abstract

(57) [Problem] To provide a leak test apparatus for a test object which can be used in a line for assembling various test objects, and can suppress a decrease in productivity of the line. A leak test device is a device for inspecting the presence or absence of a leak in a cooling water path of an engine as an inspection object.
In the leakage inspection device, a sealing jig 30 for sealing the connection port 13 as an opening of the engine is mounted on the tip of the robot arm 3. The sealing jig 30 includes a floating portion 31, a cylinder 32, a quick connector 33, and a holding portion. The floating portion 31 supports the quick connector 33 and the like so as to swing freely. The cylinder 32 pushes the quick connector 33 toward the connection port 13. Nipping part 3
4 includes a pair of holding members 46 which are vertically separated.
The holding members 46 sandwich the connection port 13 between each other so that the sealing member 41 of the connector 33 can be inserted into the connection port 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leakage inspection apparatus for inspecting an inspection object such as an engine having a cooling water flow path for leakage.

[0002]

2. Description of the Related Art At the end of an engine assembly line, for an engine in which a cylinder block, a cylinder head, and the like are assembled together, it is necessary to confirm a defective assembly of parts, a defect of a material, and a sealing property of a seal portion. A leak test is performed.

For example, in a leak test for checking the presence or absence of leakage in a cooling water path, an opening such as a water pipe on the inlet side of the path and a drain hole as a drain port is sealed, and air or the like is connected through a connection port on the outlet side. The pressurized fluid is supplied and the change in pressure is measured to check for engine leakage.

Conventionally, when the above-mentioned water pipe and the drain hole are sealed, an operator manually attaches a dedicated jig, and even when the connection port is sealed, a fluid is supplied into the engine. A test jig was provided by hand to seal the connection port except for the fluid supply port. Thereafter, the engine was inspected for leakage, and after the test, the operator manually removed these jigs.

[0005]

As described above, if an operator manually attaches and removes a jig and the like, the time required for inspection of one engine tends to be long, and as a result, engine In the leak test, the required time is inconsistent with the speed of other processes, and the productivity of the engine assembly line tends to decrease.

Further, since the positions and shapes of the water pipes, drain holes, and connection ports described above may differ depending on the type of engine, depending on the engine assembly line,
A wide variety of engines will be assembled. As described above, since the positions and shapes of the water pipe, the drain hole, and the connection port are different for each engine, it has been difficult to automate the mounting of the sealing jig to various types of engines.

Accordingly, an object of the present invention is to efficiently and surely inspect the presence or absence of leakage of an object to be inspected and suppress the above-mentioned decrease in productivity of the line even when used in a line for assembling a variety of objects to be inspected. It is an object of the present invention to provide a leak test apparatus capable of performing the test.

[0008]

According to a first aspect of the present invention, there is provided a leak inspection apparatus, wherein a sealing means for sealing an opening of an object to be inspected is provided on a robot arm. Therefore, it can be attached to and detached from the test object in a relatively short time.

Further, since the sealing means is detachable from the robot arm, any sealing means can be selected and used depending on the type of the object to be inspected assembled on an assembly line or the like. Changes in the means can also be made in a relatively short time. Therefore, the openings of various kinds of test objects in this line can be reliably sealed in a short time.

Further, even in the case where the position of the opening of the same type of test object is different for each test object, the guide means guides the sealing means to be inserted into the opening, and the floating means controls the sealing means by the floating means. Since it is swingably supported, the opening can be reliably sealed even if the opening is slightly misaligned with the sealing means.

According to the second aspect of the present invention, since the guide means is a holding portion for holding and positioning the sealing means by holding the opening of the test object, the opening of the test object of the same type is provided. Even if the position is different for each test object, the positional relationship between the opening and the sealing means can always be kept constant.

According to the third aspect of the present invention, since the guide means is a tapered member having a tapered surface that tapers, the position of the opening of the same type of inspected object differs for each inspected object. Also in this case, the tapered surface comes into contact with the inner surface of the opening of the test object to guide the sealing means to be inserted into the opening.

According to a fourth aspect of the present invention, the sealing means includes a sealing member made of an elastic body which comes into close contact with the inner surface of the opening by being enlarged in diameter after being inserted into the opening. Thus, the opening can be more securely sealed.

In the leak inspection apparatus according to the fifth aspect, since the sealing means is provided with a sealing member made of an elastic body which closes the opening by being pressed against the opening edge of the opening, the sealing means is more reliably provided. The opening can be sealed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The leakage inspection device 1 shown in FIG. 1 inspects the engine 2 as an object to be inspected for leakage, for example, in a cooling water path or the like, and confirms a defective assembly of the engine 2, a defect in a material, and a hermetic seal. Device.

As shown in FIG. 1, the leak test apparatus 1 includes a robot arm 3, a drain hole sealing section 4, a water pipe sealing section 5, a leak test machine 6, and a leak test machine control section 7.
And a sealing jig holder 8 and a robot arm controller 9.

The leak inspection apparatus 1 is provided at the end of an assembly line of an automobile engine. In the vicinity of the leak test apparatus 1, a cylinder block, a cylinder head, and the like are assembled together, and the engine 2 is transported by a conveyor 10 or the like along an arrow T shown in the drawing, and temporarily stopped and positioned. It is supposed to be.

This leak inspection apparatus 1 is used to inspect the engine 2 for the presence of leakage in the cooling water path.
A water pipe 11 on the inlet side of the cooling water path and an opening such as a drain hole 12 as a drain hole are hermetically sealed, and a connection hole on the outlet hole side of the cooling water path and from the connection port 13 as an opening. A fluid such as air is supplied under pressure. The connection port 13 protrudes in a pipe shape.

The robot arm 3 is mounted on a floor 14 or the like, and is rotatable within a range indicated by a dashed line P in the figure. A sealing jig 30 as a sealing means for supplying can be detachably mounted.

The robot arm 3 selects and mounts a sealing jig 30 corresponding to the type of the engine 2 conveyed by the conveyor 10 from the sealing jig holder 8, and the tip of the sealing jig 30 is It is driven by the robot arm control unit 9 so as to face the connection port 13.

The drain hole sealing portion 4 includes an arm portion 15 and a sealing member 16 provided at the tip of the arm portion 15. The arm portion 15 is slidably movable along an arrow S shown in the drawing, which intersects the arrow T.
Mounted on

The arm portion 15 is positioned along the arrow S to move the sealing member 16 to a position facing the drain hole 12 and to the conveyor 1.
It slides over a position that does not hinder the transport of the engine 2.

An extruding device 17 is provided at the tip of the arm portion 15 and has a function of extruding the sealing tool 16 toward the drain hole 12. Sealing device 16
Is a sealing member 1 that seals the drain hole 12 at its most distal end.
The sealing member 18 is made of an elastic body such as rubber, whose surface facing the drain hole 12 is larger than the diameter of the drain hole 12 and formed flat.

According to the above-described configuration, the drain hole sealing portion 4 is configured such that the arm portion 15 thereof connects the sealing member 16 to the drain hole 12.
And the extruder 17 causes the sealing device 16 to move the drain hole 1
By pushing out toward 2, the sealing member 18 comes into contact with the opening edge of the drain hole 12 to seal.

Further, a pair of the drain hole sealing portions 4 are provided along the arrow T at positions where the robot arm 3 is sandwiched before and after the transfer line.
The drain hole sealing portion 4 can reliably seal the drain holes 12 of the various kinds of engines 2 even when the various kinds of engines 2 are assembled at the same time.

The water pipe sealing part 5 is provided on a slide base 19 mounted on the floor 14 or the like so as to be slidable along the arrow T between the drain hole sealing parts 4 and 4 and on the slide base 19. A sealing device 20 and an extruding device 21 are provided.

The slide table 19 is configured to position the sealing device 20 so as to face the water pipe 11 in accordance with the type of the engine 2. The extrusion device 21
When the sealing device 20 faces the water pipe 11, the sealing device 20 is pushed out toward the water pipe 11.

The sealing member 20 has a sealing member 22 for sealing the water pipe 11 at the most distal end. The sealing member 22 is made of an elastic body such as rubber whose surface facing the end face of the water pipe 11 is larger than the inner diameter of the water pipe 11 and formed flat.

According to the above-described structure, the water pipe sealing portion 5 is configured such that the slide table 19 causes the sealing device 20 to face the water pipe 11 and the extruding device 21 controls the sealing device 2.
By pushing 0 toward the water pipe 11, the sealing member 22 comes into contact with the opening edge of the water pipe 11 to seal.

Further, the water pipe sealing portion 5 is provided with the pushing device 21 and the sealing device 20 along the arrow T.
The water pipes 11 of the engines 2 can be reliably sealed even when various kinds of engines 2 are assembled at the same time. Further, according to the type of the engine 2, three or more sets of the extruder 21 and the closure 20 may be provided.

The leak tester 6 has a source of pressurized fluid,
A fluid such as air is pressurized and supplied from the pressurized fluid supply source to a sealing pressure supply pipe 43 and a test pressure supply pipe 44 of the sealing jig 30 described later.

The leak tester control unit 7 controls the leak tester 6
Has a function of controlling the fluid supply state of the engine 2. When the fluid is pressurized and supplied to the test pressure supply pipe 44, the pressure of the fluid during a predetermined time and a change in the pressure of the engine 2 serve as the test object. It has a function to determine the presence or absence of leakage.

The sealing jig holder 8 is provided within the turning range of the robot arm 3, and holds a sealing jig 30 corresponding to the type of the engine 2 to be assembled.

The robot arm controller 9 controls the robot arm 3 according to the optimum trajectory by using the sealing jig holder 8.
In the period from when the sealing jig 30 is mounted to when the sealing jig 30 is opposed to the connection port 13,
Control.

The sealing jig 30 is, as shown in FIG.
A floating portion 31 as a floating means;
Cylinder 32 as a moving means and quick connector 3
3 and a holding portion 34 as a guide means.
2A is a plan view when the sealing jig 30 is viewed from above, and FIG. 2B is a view b shown in FIG. 2A.
FIG. 4 shows a cross-sectional view along the line -b.

The floating portion 31 is detachably attached to the tip of the robot arm 3 and has a plurality of directions intersecting a later-described expansion and contraction direction of the cylinder 32 (a direction along arrow O in the drawing). For example, the quick connector 33 and the like are swingably supported along, for example, arrows K1 and K2 in the drawing, and the quick connector 33 and the like are swingably supported in all directions with respect to the robot arm 3. .

The floating portion 31 has a
A frame member 35 to which the cylinder 32 and the holding portion 34 are attached is provided. As shown in FIG.
As shown in FIG. 2A, a bottom wall portion 36 is formed in a U-shape when viewed from above, and is attached to the floating portion 31. A pair of side wall portions extending from both ends of the bottom wall portion 36 to the distal end side. 37 and 37 are integrally provided. The side walls 37 are formed parallel to each other and along the arrow O.

The side walls 37, 37 of the frame member 35
The cylinder 32 is provided between the two and at the front end side of the bottom wall portion 36. The cylinder 32 extends along the arrow O in the drawing so as to push the quick connector 33 toward the connection port 13 when the sealing jig 30 is opposed to the connection port 13 by the robot arm 3. I have.

As shown in FIG. 2B, the quick connector 33 is connected to the cylinder 32 via a plate-like connecting member 38, and the connector body 39, the pressing member 40,
A sealing member 41 made of an elastic material such as rubber;
2, a sealed pressure supply pipe 43, a test pressure supply pipe 44, and the like.

The connector body 39 is formed in a columnar shape and is connected to the connecting member 38. A sealing pressure supply pipe 43 and a test pressure supply pipe 44 are provided at a rear end side, and the sealing member 41 is provided at a front end side. And a disk member 42.

The sealed pressure supply pipe 43 and the test pressure supply pipe 44 are connected to the leak tester 6, and pressurized fluid is supplied from the tester 6. The test pressure supply pipe 44 is connected to the connector main body 39 and the sealing member 4.
1 and open to the distal end side of the disk member 42.

The pressing member 40 is formed in a bottomed cylindrical shape having an annular portion having an inner diameter slightly larger than the outer circumference of the connector main body 39, and the outer circumference of the connector main body 39 with the bottom positioned at the front end side. It is provided to surround. Further, when a pressurized fluid is supplied from the leak tester 6 to the sealed pressure supply pipe 43, the pressurized fluid slides along the arrow O with respect to the connector main body 39.

The disk member 42 is formed in a disk shape large enough to be inserted into the connection port 13, is provided at the most distal end of the sealing jig 30, and has a positional relationship with the connector body 39. Is always kept constant.

The sealing member 41 is formed in a columnar shape large enough to be inserted into the connection port 13, is provided between the disk member 42 and the connector body 39, and is connected to the sealing pressure supply pipe 43. A pressurized fluid is supplied and the pressing member 4
When “0” slides toward the distal end, the “0” is regulated by the disk member 42 and pressed along the arrow O. The diameter of the sealing member 41 is increased by expanding in a direction intersecting the arrow O, that is, in the outer peripheral direction of the connector body 39, so that the sealing member 41 comes into close contact with the inner surface 13 a of the connection port 13.

The holding portion 34 includes a pair of air chucks 45,
45, and a pair of holding members 46, 46 and the like.
The air chucks 45 are provided outside the side walls 37 of the frame member 35, respectively.

As shown in FIG. 2 (B), the holding members 46, 46 are provided so as to be vertically separated from each other, and are formed so that the distance between them gradually increases toward the distal end. As shown in FIG. 2 (A), both ends of the holding member 46 are connected to the air chucks 45, 45, and the vicinity of the center between the air chucks 45, 45 is gradually stepped toward the front end from both ends. It is formed so as to protrude.

The air chuck 45 moves the holding members 46, 46 provided vertically apart from each other in a direction approaching each other, and sandwiches the connection port 13 between the holding members 46, 46 from both sides in the vertical direction. Has become. The air chuck 45 and the holding members 46, 46 hold the connection port 13 so as to maintain the positional relationship between the connection port 13 and the sealing member 41 so that the sealing member 41 can always be inserted into the connection port 13. Has become.

The sealing jig 30 includes the holding members 46 and 46 and the sealing member 41 depending on the type of the engine 2.
A plurality of pieces having different sizes from each other are placed on the sealing jig holder 8.

With the configuration described above, the engine 2 is conveyed by the conveyor 10 and positioned once at a predetermined position in the vicinity of the leak inspection device 1, and the predetermined drain hole sealing portions 4, 4 are selected according to the type of the engine 2. Seals the drain hole 12 as described above, and
Seals the water pipe 11 as described above.

The sealing jig 30 seals the connection port 13 substantially simultaneously with the sealing of the drain hole 12 by the drain hole sealing portions 4 and 4 and the sealing of the water pipe 11 by the water pipe sealing portion 5 as described below. I do.

First, the robot arm 3 is
The jig 30 corresponding to the type of the engine 2 conveyed by the above is taken out from the sealing jig holder 8 and attached to the tip, and then the robot arm controller 9 is driven according to the optimum trajectory, and FIG. The sealing member 41 of the sealing jig 30 is made to face the connection port 13 as shown in FIG.

The holding members 46, 46 are moved so that the air chuck 45 of the holding portion 34 narrows the gap between the holding members 46, 46 vertically separated from each other, and as shown in FIG. , 46 between the connection ports 13. At this time, the positional relationship between the sealing member 41 and the connection port 13 is maintained so that the sealing member 41 can be inserted into the connection port 13.

At this time, even if there is a displacement between the connection port 13 and the sealing jig 30 due to the assembling condition of the engine 2 and the like, the floating part 31 supports the quick connector 33 and the like so as to swing freely. So
The sealing member 41 of the quick connector 33 and the connection port 13
Is reliably maintained.

Then, as shown in FIG. 3 (C), the cylinder 32 extends, and the sealing member 41 is inserted into the connection port 13. Pressurized fluid is supplied from the leak tester 6 to the sealed pressure supply pipe 43, and the pressing member 40 of the quick connector 33 is pushed out toward the connection port 13.

Since the sealing member 41 is pressed along the arrow O and is made of an elastic material such as rubber and the distal end is regulated by the disk member 42, the sealing member 41 expands toward the outer peripheral direction of the connector body 39.

Then, as shown in FIG. 3D, the sealing member 41 is in close contact with the inner surface 13a of the connection port 13 to seal the connection port 13. Thereafter, the pressurized fluid is supplied from the pressurized fluid supply source of the leak tester 6 to the test pressure supply pipe 44, and the cooling water path of the engine 2 is maintained at a higher pressure than the outside. Based on this pressure change, the leak tester 6
It is determined whether there is any leakage in the cooling water path.

According to the leak inspection apparatus 1 of the present embodiment, the sealing jig 30 in which the sealing member 41 and the holding member 46 are different from each other in the sealing jig placing portion 8 according to the type of the engine 2.
Are provided and the sealing jig 30 is detachably attached to the tip of the robot arm 3, so that the connection ports 13 of the various engines 2 can be reliably sealed in a short time.

Further, the connection port 1 of the engine 2 of the same type
3 is different for each engine 2,
4 holds the sealing member 41 so that it can be inserted into the connection port 13, and the floating portion 31
3 is swingably supported, so that the connection port 13 can be securely sealed.

Accordingly, the presence or absence of leakage in the cooling water path of the engine 2 can be reliably inspected, and the inspection time can be shortened, so that the time required for the leakage test and other steps can be suppressed. In addition, it is possible to suppress a decrease in line productivity.

FIGS. 4 and 5 show a second embodiment, in which the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 4A is a plan view of a sealing jig 50 as a sealing unit in the present embodiment when viewed from above, and FIG. 4B is a view taken along the line bb shown in FIG. FIG. 3 shows a sectional view along the line.

In this embodiment, tool changers 51 and 52 are provided at the front end of the robot arm 3 and at the rear end of the sealing jig 50, respectively, which are detachable from each other.
The attachment and detachment of the sealing jig 50 is performed.

The sealing jig 50 in this embodiment is mounted on the tool changer 52 and includes a cylinder 53 as a moving means, a frame member 54, a floating portion 55 as a floating means, a guide member 56, And the like.

The cylinder 53 is provided with the tool changer 5.
2 is provided at the distal end side, has an extendable rod 64, and is connected to the floating portion 55.
The cylinder 53 is configured such that the telescopic rod 64 extends along the arrow O in the drawing so that when the tapered member 57 faces the connection port 13 as described later, the cylinder 53 is pushed toward the connection port 13. I have.

A pair of frame members 54 fixed to the tool changer 52 are provided on both left and right sides of the cylinder 53. As shown in FIG. 4 (A), each of the frame members 54, 54 is formed in a hook shape when viewed from above, and each has a base end 58 attached to the tool changer 52, and a front end from the base end 58. A side wall portion 59 extending to the side is integrally provided. The frame member 5
The side wall portions 59, 59 of 4, 54 are formed parallel to each other and along the arrow O.

The guide member 56 is connected to the frame member 5.
4, 54 are provided so as to be sandwiched between the end portions of the side wall portions 59, 59, and are provided so as to close a cylindrical portion 60 formed in a cylindrical shape and a base end side of the cylindrical portion 60. It is formed in a bottomed cylindrical shape integrally provided with the base end 61 provided.

The cylindrical portion 60 has an inclined surface 62 formed on the inner peripheral surface so that the opening diameter gradually increases toward the distal end. At substantially the center of the base end portion 61, a hole 63 through which an extrusion member 65 described later of the floating portion 55 is loosely inserted is provided along the arrow O.

The floating portion 55 has an extruding member 65 connected to the telescopic rod 64 of the cylinder 53 and a connecting member 66 connected to the base end surface of the tapered member 57. The pushing member 65 is provided at the proximal end 6 of the guide member 56.
A columnar column 67 large enough to allow the one hole 63 to be inserted;
The end face on the front end side is formed into a curved surface having a convex center, and the protrusion 6 protrudes from the front end in the outer peripheral direction of the column 67.
8 are integrally formed.

The connecting member 66 is connected to the base end surface of the taper member 57 and is formed in a tubular shape, and is formed to extend in the inner circumferential direction from the end located on the base end side. A hook 69 for locking the projection 68 is integrally provided. The projection 68 is located between the hook 69 and the projection 68.
A gap is provided in a range that does not come off from the position 9.

The connecting member 66 and the pushing member 65 support the tapered member 57 to the robot arm 3 so as to be swingable in a direction intersecting the arrow O, such as a direction along arrows K1 and K2 in the drawing. ing. That is, the taper member 57 is swingably supported in all directions.

The taper member 57 integrally includes a cylindrical portion 70 having substantially the same diameter as the inner diameter of the guide member 56 and a tapered portion 72 having a tapered surface 71. A sealing member 73 made of an elastic material such as rubber is provided between them. The sealing member 73 is connected to the connection port 13.
Is formed in an annular shape having a diameter larger than the outer diameter of the connection port 13 so that it can be in close contact with the end face 13 b of the opening edge of the connection port 13.

The tapered member 57 includes a parallel portion 74 having an inner diameter and an outer diameter substantially equal to each other at the base end side of the tapered surface 71 and at the distal end side of the sealing member 73. It has a test pressure supply hole 75 penetrating to 70. The test pressure supply hole 75 is connected to a pressurized fluid supply source of the leak tester 6 or the like.

According to the above-described structure, when the drain hole 12 of the engine 2 and the water pipe 11 are sealed, similarly to the above-described first embodiment, the sealing jig 50 is connected to the connection port 13 as shown below. Seal.

First, the robot arm 3 takes out the sealing jig 50 corresponding to the type of the engine 2 from the sealing jig holder 8 and mounts it on the tip using the tool changers 51 and 52. Then, the robot arm 3 is driven in accordance with the optimal trajectory stored in the robot arm control unit 9 to cause the tapered member 57 of the sealing jig 50 to face the connection port 13 as shown in FIG. It is slightly inserted into the connection port 13.

Then, the cylinder 53 is extended. When the cylinder 53 extends and the rear end of the cylindrical portion 70 of the tapered member 57 approaches the inclined surface 62 of the guide member 56, the tapered member 57 is supported by the floating portion 55 so as to swing freely. As shown in ()), a part of the tapered surface 71 comes into contact with the inner surface of the connection port 13 due to the weight of the tapered member 57 and the like.

Further, as the cylinder 53 extends,
The tapered member 57 is guided into the connection port 13 while the tapered surface 71 contacts the inner surface of the connection port 13. And FIG.
As shown in (C), the parallel portion 74 and the inner surface of the connection port 13 are fitted to each other, and the sealing member 73 is made of an elastic body such as rubber. 13 will be closed. Thereafter, similarly to the first embodiment, the presence or absence of leakage of the engine 2 is inspected.

According to the present embodiment, as in the first embodiment described above, it is possible to inspect the presence or absence of leakage of an object to be inspected such as the engine 2 and to shorten the inspection time, thereby improving the productivity of the engine assembly line. The decrease can be suppressed.

Further, the connection port 1 of the engine 2 of the same type
Even when the position of 3 is different for each engine 2, the tapered surface 71 guides the tapered member 57 into the connection port 13 and the floating portion 55 supports the tapered member 57 so that the tapered member 57 can swing freely. The connection port 13 can be sealed.

FIGS. 6 and 7 show a third embodiment. The same components as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted. FIG. 6A is a plan view of a sealing jig 80 as a sealing means in the present embodiment when viewed from above, and FIG. 6B is a view taken along the line bb shown in FIG. FIG. 3 shows a sectional view along the line.

The sealing jig 80 in this embodiment is similar to the sealing jig 80 shown in FIG.
As shown in (1), an air piston portion 81 is provided between the cylinder 53 and the tapered member 57. Air piston part 81
The main body member 82 is formed in a cylindrical shape along the direction of expansion and contraction of the cylinder 53 (the direction along the arrow O in the drawing), and a piston member 83 provided in the main body member 82. And a connecting member 84 connected to the base end surface of the tapered member 57.

The partition member 85 is integrally provided in the main body member 82 at substantially the center in the direction along the arrow O. The partition wall 85 has a hole 86 that penetrates along the arrow O at substantially the center. The main body member 82 includes a first space 87 located on the distal end side by a partition wall 85,
It is partitioned into a second space 88 located on the base end side.

The piston member 83 is integrally provided with a disk portion 89 and a cylindrical portion 90 extending in one direction from the disk portion 89, and has a tapered portion 91 at the tip. The piston member 83 is configured so that the disk portion 89 is in the second space 8.
8, the cylindrical portion 90 is housed in the main body member 82 with the tapered portion 91 directed toward the distal end side through the hole 86 of the partition wall 85.

The piston member 83 has a packing provided on the outer periphery of the disk portion 89 to ensure airtightness between the inner surface of the main body member 82 and the disk member 89.
The second second space 88 is divided into a first chamber 92 located on the distal side and a second chamber 93 located on the proximal side.

The main body member 82 is provided with a hole 8 in the partition wall 85.
A packing for ensuring airtightness between the cylindrical portion 90 and the cylindrical portion 90 is provided on the inner surface of the second space 88, and a first supply port 94 for supplying a fluid such as air to the first chamber 92 of the second space 88; Room 93
And a second supply port 95 for supplying a fluid such as air to the second supply port.

The leak tester 6 is connected to the gas supply ports 94 and 95. The piston member 83 is movable along the arrow O by supplying a fluid from the leak tester 6 to the first chamber 92 or the second chamber 93.

The connecting member 84 is formed in a cylindrical shape, and has one end connected to the base end surface of the tapered member 57 and the other end provided with a concave portion 96 with which the tapered portion 91 of the piston member 83 engages. The connecting member 84 is supported on a wall located on the distal end side of the main body member 82 so that the tapered member 57 can swing freely, for example, along arrows K1 and K2 in the drawing.

According to the above-described configuration, when the drain hole 12 and the water pipe 11 of the engine 2 are sealed at substantially the same time as in the first and second embodiments described above,
The sealing jig 80 seals the connection port 13 as shown below.

First, the robot arm 3 takes out the sealing jig 80 corresponding to the type of the engine 2 from the sealing jig holder 8 and mounts it on the tip using the tool changers 51 and 52. Next, driven by the robot arm control unit 9, the taper member 57 of the sealing jig 80 is made to face the connection port 13 as shown in FIG.
Insert slightly into 3.

At this time, the second chamber 9 of the air piston portion 81
3 is maintained at a higher pressure than the first chamber 92, and the piston member 83 is urged toward the distal end. The tapered portion 91 of the piston member 83 is engaged with the concave portion 96 of the connecting member 84 to maintain the attitude of the tapered member 57.

Then, from the leak tester 6 and the like, the first chamber 92
The first chamber 92 is set at a higher pressure than the second chamber 93 by supplying a pressurized fluid to the piston, and the piston member 83 is moved to the proximal side to engage the tapered portion 91 with the concave portion 96. To release. Then, as shown in FIG.
Due to its own weight or the like, a part of the tapered surface 71 comes into contact with the inner surface of the connection port 13. Then, cylinder 5
When the extension 3 is extended, the tapered member 57 is guided into the connection port 13 while the tapered surface 71 contacts the inner surface of the connection port 13.

The parallel portion 74 and the inner surface of the connection port 13 are fitted with each other. Thereafter, the tapered portion 91 of the piston member 83 and the connecting member 8 are maintained while maintaining the second chamber 93 at a higher pressure than the first chamber 92.
The tapered member 57 is fixed by engaging the four concave portions 96 with each other. At this time, since the sealing member 73 is made of an elastic body such as rubber, as shown in FIG. 7C, the sealing member 73 comes into close contact with the end face 13b of the connection port 13 and closes the connection port 13. Thereafter, as in the first and second embodiments, the presence or absence of leakage of the engine 2 is inspected.

According to the present embodiment, similarly to the first and second embodiments described above, the presence or absence of leakage of an object to be inspected such as the engine 2 can be inspected, the inspection time can be reduced, and the engine assembly line can be inspected. A decrease in productivity can be suppressed.

FIGS. 8 and 9 show a fourth embodiment. The same components as those in the first to third embodiments are denoted by the same reference numerals and description thereof is omitted. As shown in FIG. 8, a sealing jig 100 as a sealing means in the present embodiment includes:
A frame member 101 connected to the distal end side of the floating portion 31, a cylinder portion 102 as moving means, and a taper member 57 as guiding means are provided. The cylinder portion 102 moves the tapered member 57 toward the connection port 13,
It pushes out along the arrow O in the drawing.

The cylinder part 102 includes a frame member 101
Shell 104, a first piston 105 housed in the shell 104, and a second piston 106
And

The outer shell 104 is formed in a bottomed cylindrical shape integrally provided with a cylindrical tube 107 and a bottom 108 for closing the base end side of the tube 107. The outer shell 104 has a bottom part 108 connected to the frame member 101 and an integral hook part 109 protruding toward the inner peripheral side at an end located on the distal end side of the cylindrical part 107. . Outer part 1
04 is provided with a hole 110 penetrating substantially at the center of the bottom 108 along the arrow O.

The first piston 105 integrally includes a disk portion 111 having a diameter slightly smaller than the inner diameter of the cylindrical portion 108 and a column portion 112 extending in one direction from the disk portion 111. Are housed in the outer shell 104 in a state substantially parallel to the bottom 108 and the column 112 along the arrow O.

The first piston 105 has a hole 113 penetrating along the arrow O at substantially the center thereof. A compression spring 114 that urges the first piston 105 toward the base end is provided between the disk 111 and the hook 109.

The second piston 106 has a cylindrical portion 115 having a cylindrical shape and an inner diameter slightly larger than that of the column portion 112, a front end side of the cylindrical portion 115 being closed, and an outer diameter being the inner diameter of the hook portion 109. A bottom portion 116 having a slightly smaller diameter is integrally provided.
The bottom part 116 has a hole 117 substantially in the center thereof,
have.

As shown in FIG. 8, when the disk portion 111 is located near the bottom portion 108, the second piston 106 has the bottom portion 116 located on the same plane as the hook portion 109, The cylindrical portion 115 is housed in the outer shell 104 in a state surrounding the column portion 112 and in contact with the disk portion 111.

The outer shell 104 has a first cylinder operating hole 11 penetrating the bottom 108 along the arrow O.
8 are provided. The first piston 109 has a pillar 112
Through the second cylinder operating hole 1 along the arrow O
19 are provided. The first cylinder operation hole 118 is configured to be supplied with a fluid such as the air under pressure from the leak tester 6 or the like.

In this embodiment, the tapered member 57 is
The outer diameter of the sealing member 73 is formed slightly smaller than the inner diameter of the connection port 13. The taper member 57 includes a test pressure supply pipe 103 which communicates with the hole 117 of the second piston 106, the hole 113 of the first piston 105, and the hole 110 of the bottom 108 of the outer shell 104. The test pressure supply pipe 103 is opened at the tip end surface of the taper member 57, and is connected to the leak tester 6 so that a pressurized fluid is supplied.

The outer shell 104 is provided with a hole 1 in the bottom 108.
A packing for ensuring airtightness with the test pressure supply pipe 103 is provided on the inner surface of the pipe 10, and a packing for ensuring airtightness with the second piston 106 is provided on the inner surface of the hook 109.

The first piston 105 has a packing on the outer peripheral surface of the disk portion 111 for ensuring airtightness between the outer peripheral portion 104 and the second piston 106 on the outer peripheral surface of the tip of the column portion 112. And gasket for ensuring airtightness between them. The second piston 106 has a hole 1 in the bottom 116.
A packing for ensuring airtightness with the test pressure supply pipe 103 is provided on the inner surface of the pipe 17.

The first packing is used by these packings and the like.
A first fluid chamber 120 is formed between the disc 111 of the piston 105 and the bottom 108 of the outer shell 104, and the column 112 of the first piston 105 and the second
A space surrounded by the inner surface of the piston 106 is formed as a second fluid chamber 121.

The fluid flowing from the first cylinder operation hole 118 provided in the bottom portion 108 of the outer shell 104 passes through the first fluid chamber 120, the second cylinder operation hole 119, etc., and passes through the second cylinder operation hole 119. The fluid flows into the fluid chamber 121.

According to the above-described structure, the drain hole 12 of the engine 2 and the water pipe 11 are sealed substantially at the same time as in the first to third embodiments, and at the same time, the sealing treatment is performed as described below. The tool 100 seals the connection port 13.

First, the robot arm 3 takes out the sealing jig 100 corresponding to the type of the engine 2 from the sealing jig holder 8 and mounts it on the tip. And the robot arm 3
Is driven by the robot arm control unit 9, and FIG.
As shown in (A), the taper member 57 of the sealing jig 100 is opposed to the connection port 13, and the tip of the taper member 57 is slightly inserted into the connection port 13.

When a fluid is supplied from the leak tester 6 or the like to the first cylinder operating hole 118, the supplied fluid presses the surface of the disk portion 111 of the first piston 105 and the second piston 106 Is pressed on the bottom 116.

At this time, since the disc 111 has a larger pressure receiving area from the fluid, the disc 1 of the first piston 105
The pistons 105 and 106 and the taper member 57 are integrally pushed out until the hook 11 approaches the hook 109 of the outer shell 104. Then, as shown in FIG. 9B, the taper member 57 is inserted into the connection port 13.

Further, when a fluid is supplied to the first cylinder operating hole 118, the bottom 116 of the second piston 106 presses the sealing member 73 along the arrow O, and FIG.
Since the sealing member 73 is made of an elastic body such as rubber as shown in FIG. 7, the sealing member 73 expands toward the outer peripheral direction of the tapered member 57 and comes into close contact with the inner surface 13 a of the connection port 13. Thereafter, similarly to the first to third embodiments, the presence or absence of leakage of the engine 2 is inspected.

According to the present embodiment, similarly to the first to third embodiments described above, it is possible to inspect the presence or absence of leakage of an object to be inspected such as the engine 2 and to shorten the inspection time, thereby reducing the engine assembly line. A decrease in productivity can be suppressed.

[0111]

According to the leak inspection apparatus of the present invention, since the openings of various kinds of test objects assembled on a line or the like can be reliably sealed in a short time, it is necessary for a leak test of the test object. This can reduce the time required to perform the process and prevent the required time from other processes from being increased. Therefore, the presence / absence of leakage of the inspection object can be reliably inspected, and a decrease in productivity of an assembly line or the like can be suppressed.

In addition to the effect of the first aspect, the leak inspection apparatus according to the second aspect always keeps the positional relationship between the opening and the sealing means constant, so that the guide means more reliably inserts the sealing means into the opening. The opening can be reliably sealed by guiding. Therefore, a decrease in productivity of an assembly line or the like can be further suppressed.

According to the third aspect of the present invention, in addition to the effect of the first aspect, the taper member as the guide means guides the sealing means so that it can be easily inserted into the opening, so that the guide means is more securely sealed. The means can be guided into the opening to ensure that the opening is sealed. Therefore, a decrease in productivity of an assembly line or the like can be further suppressed.

In the leak test apparatus according to the fourth and fifth aspects, in addition to the effect of the first aspect, since the opening can be more securely sealed, it is possible to more reliably inspect the object to be inspected for leakage. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view of a leakage inspection device according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing the sealing jig of the embodiment shown in FIG.

FIG. 3 is an explanatory view showing a situation where the sealing jig shown in FIG. 2 seals a connection port.

FIG. 4 is an explanatory view showing a sealing jig of a leakage inspection device according to a second embodiment of the present invention.

FIG. 5 is an explanatory view showing a situation where the sealing jig shown in FIG. 4 seals a connection port.

FIG. 6 is an explanatory view showing a sealing jig of a leakage inspection device according to a third embodiment of the present invention.

FIG. 7 is an explanatory view showing a situation where the sealing jig shown in FIG. 6 seals the connection port.

FIG. 8 is an explanatory view showing a sealing jig of a leakage inspection device according to a fourth embodiment of the present invention.

FIG. 9 is an explanatory view showing a situation where the sealing jig shown in FIG. 8 seals the connection port.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Leakage inspection apparatus 2 ... Engine (inspection object) 3 ... Robot arm 13 ... Connection port (opening) 30, 50, 80, 100 ... Sealing jig (sealing means) 31, 55 ... Floating part (floating means) 32, 53, 102: cylinder part (moving means) 34: clamping part (guide means) 41, 73 ... sealing member 57: taper member (guide means) 71: tapered surface

Claims (5)

[Claims] 1. A device for supplying a pressurized fluid to the inside of an object to be inspected and inspecting for leakage. Sealing means for sealing the portion; moving means for moving the sealing means toward the opening; and guiding means for guiding the sealing means into the opening when the moving means moves toward the opening. And a floating means for swingably supporting the sealing means with respect to the opening. 2. The guide means sandwiches the opening,
2. The leak inspection apparatus according to claim 1, wherein the sealing means is a holding portion for positioning and holding the sealing means so as to be inserted into the opening. 3. The guide means has a tapered surface that tapers at the tip, and the taper surface contacts the inner surface of the opening to guide the sealing means as the moving means moves. The member is a member.
The leak inspection device as described. 4. The sealing means according to claim 1, further comprising a sealing member made of an elastic body which is inserted into said opening, expanded in diameter by a pressurized fluid, and comes into close contact with an inner surface of said opening. Item 1. A leakage inspection device according to Item 1. 5. A leak inspection according to claim 1, wherein said sealing means has a sealing member made of an elastic body which closes said opening by being pressed against an end face of an opening edge of said opening. apparatus.