KR900002198B1 - Leak tester - Google Patents

Abstract

A leak tester for detecting the leakage of sealed gas includes a cavity, a pressing fixture (23)(23') - (28)(28') having a pressing unit (10) - (15) to seal the open gate of a tested object, a plurality of pressing unit for pressing the fixture to the sealed face of the tested object, a first device (29) for loading and unloading the fixture, a dummy member (47)(48) corresponding to the tested object shape, a moving means (49) for allowing the dummy member to be moved between the sensing and disengaging position, and a second device (61) for loading and unloading the pressing fixture to the dummy member.

Description

Leak Test [LEAK TEST] Device

The drawings illustrate embodiments of the invention.

1 to 3 are a front view, a plan view, and a side view respectively showing the leak test state.

4 to 6 are enlarged plan views, enlarged side views, and recessed enlarged plan views, each showing a state in which the pressing jig is held on the DUMMY member.

* Explanation of symbols for main parts of the drawings

(10) to (15): Pressing unit (23) (23 ') to (28) (28'): Pressing fixture

(29): first detachable mechanism 30: pressing unit

(47) (48): dama member 49: vehicle

(61): Second detachable mechanism (W): Test object

The present invention relates to a leak test apparatus capable of efficiently performing a leak detection operation of a plurality of inspected objects having different seals.

Conventionally, for example, when performing a leak test of a CYLINDER HEAD of an automobile engine, an oil WAY water jacket, a locker room, etc. formed in the CYLINDER HEAD A gas is enclosed in the cavity in the state where the seal is closed with each opening of the cavity opening to the outside as a pressing jig, and the enclosed gas is detected to leak. .

However, in the above conventional case, when continuously leak testing a plurality of inspected objects having different seal face shapes, it is necessary to change the pressing fixture whenever the seal face shapes are different. However, this change work is usually performed by human hands at that time, and thus there is a problem that the change work requires a long time and is inefficient.

This invention is made | formed in view of such a point, Comprising: The objective is to make it possible to automatically replace the press fixture which seal-closes the opening part of a to-be-tested object, and even if it is a plurality of to-be-tested object with a different shape of a seal surface, It is intended to improve the leak detection workability by sealing the opening part quickly without bothering the user's hands.

In order to achieve the above object, the sea-viewing means of the present invention is a leak test apparatus that seals and closes each opening of a plurality of inspected objects having different seal surface shapes having a cavity opening to the outside and detects gas leaking into the cavity. A plurality of press fixtures having a press section for sealing and closing the openings of the respective inspected objects, and a plurality of press units (UNIT) arranged to correspond to the seal surfaces of the respective inspected objects to press the press fixtures to the seal surfaces of the inspected objects; And a first attachment mechanism and a second attachment mechanism for holding each pressing fixture as a detachable material in each pressing unit, and further, a plurality of DUMMY members and their respective damaging members set in a shape corresponding to the weak appearance of the inspected object. Moving means for moving the pressure between the detection position and the retracted position and the second jig to hold each pressing jig as a detachable material on each dama member. It is set as the structure which installs attachment and detachment mechanism.

According to the above configuration, in the present invention, the plurality of pressing fixtures having the pressing portion for sealing and closing the opening of the inspected object are held in the retreat position by being held by the second attachment / removing mechanism in the damascene member when not in use.

In use, the dama member is moved to the detection position by the moving means to hold each press fixture held in the dama member to the plurality of press units by the holding operation of the first detaching mechanism and at the same time to release the second detachable mechanism. The pressing fixtures are separated from the dama member by pressing, and each pressing fixture is pressed against the sealing surface of the inspection object with each pressing unit to seal the gas into the cavity of the inspection object and perform a leak test.

On the other hand, after the end of the leak test, each pressing jig retained in each pressing unit is held in the dama member by the holding operation of the second detachable mechanism, and each pressing jig is released by the release operation of the first detachable mechanism. It is separated from each press unit, and a damaging member (each press fixture) is retracted from a detection position to a retraction position by a moving means.

By doing so, the first detachable mechanism and the second detachable mechanism can be detached and operated for a plurality of inspected objects having different seal face shapes, so that each pressing jig can be automatically changed in accordance with the change of the seal face without troublesome human hands. As a result, it is possible to shorten the work for changing and improve the leak detection workability.

EXAMPLE

Best Mode for Carrying Out the Invention Embodiments of the present invention will now be described with reference to the drawings.

1 to 3 show a leaktaste device according to an embodiment of the present invention, where 1 is a plurality of perceptions (2) (2). The base supported horizontally by the predetermined height denture above the upper surface 3 by means of (4) the test object with a cavity which is disposed on the upper right side of the base 1 and opens to the outside (for example, A plurality of rollers (5) (5) for bringing the vehicle engine (cylinder hat, etc.) W into the detection position. Conveyors (6) with a plurality of rollers (7) (7) are arranged on the upper left side of the base (1) and carry out the inspected object (W) after the end of the inspection. The conveying conveyor 4 and the carrying-out conveyor 6 which are equipped with these are made so that each roller 5 and 7 may be rotationally driven by the drive source 8 and 9, such as an electric motor, respectively.

In addition, 10-15 are the several (6) press units arrange | positioned corresponding to the seal surface of the electrically inspected object W, and the press units 10-13 which press each seal side surface of the to-be-tested object W are expecting. The pressure unit 14, which is disposed at the left and right and front and rear positions of (1) and presses the seal upper surface of the test object W, is disposed at a position above the base 1, and the test object W is A press unit 15 for pressing the bottom of the seal is disposed below the base 1.

Each of the press units 10 to 15 is pressurized by the press plate 16 connected to the tip of the piston rod 17a, as shown in detail in FIGS. 4 and 5, respectively. (17) and a pressure unit (10 to 10), which are formed by holding the guide (Guide) syringes (18) provided on both sides of the fluid pressure cylinder (17), and pressing each seal side of the inspection object (W). In the reference numeral 13), the fluid cylinder 17 is supported horizontally in a state in which the tip of the piston rod 17a is inwardly directed to the mounting frame 19, which is set up on the base 1, respectively. In addition, in the pressurizing unit 14, the seal upper surface of the inspection object W is fluid pressure soaked 17, and a plurality of (four) struts 20, 20... The piston rod 17a is supported by the top plate member 21 horizontally supported as a state in which the tip of the piston rod 17a is directed downward.

Furthermore, in the pressure unit 15 which presses the sealing surface of the test object W, the fluid pressure cylinder 17 passes through the mounting plate 22 and extends the tip of the piston rod 17a upwardly under the base 1. It is supported in an oriented state.

23 to 28 are six pressing mechanisms held by the first detaching mechanism 29 in each of the pressing units 10 to 15 as detachable materials, and each of the pressing fixtures 23 to 28 is brought into the detection position, respectively. The pressing part 30 which seals and closes the opening part of the inspected object W protrudes on one side, and the engagement protrusion 31 opposes on both sides. Viii)

As shown in detail in FIG. 6, the first detachable mechanism 29 has a front end side inserted into the pressing plate 16 of each of the press units 10 to 15, and thus the front end side peripheral surface thereof. The front end of the cylinder 32 and the cylinder 32 having a slightly large diameter are attached to the rear end of the cylinder 32, and the piston rod 33a is provided within the cylinder 32. It is inserted into the cylinder (33) and the cylinder (32) provided in the axial center position thereof, the bottom surface is connected to the tip of the piston rod (33a) of the cylinder (33), the expansion and contraction of the cylinder (33) The sliding body 35 which has an onslaught 34 which moves in the cylinder body 32 in the axial direction by actuation, and is installed in the main surface of the front end side of the sliding body 35 Plural studies (36), (37). A plurality of balls (37) (38), each inserted into the hole; It is formed as. Then, one of the engagement joints 31 and 31 of each of the pressing jiges 23 to 28 is inserted into the onslaught 34 of the sliding body 35 in a state of being extended and operated. By contracting the shilinda 33, each ball 37 protrudes into the onslaught 34 and engages with the flat portion 31a of the engagement projection 31, and the respective pressure units 10 to ( 15), each pressing jig 23 to 28 is held.

In addition, the press plates 16 of some press units corresponding to mutually independent air-conditioning of the to-be-tested object W of the press units 10-15 are nozzles from an outside gas supply source. (NOZZLE) In order to supply the gas supplied through the 38 to the cavity of the test object W, a supply port 39 is opened, and each press unit 10 to 15 presses each press unit. This supply port 39 communicates with the supply passage 40 provided in the press part 30 of each press tool 23 and 28 in the state which hold | maintained the jig 23-28.

In addition, a nozzle 41 is mounted on the main surface of the cylinder 32 of the first detachable mechanism 29 to blow air from the pores 42 into the sliding body 35. At the same time, the pressing plate 16 is also attached to the nozzle 43, and is ejected from the study 44 toward the cathode pressing jig 23 to 28, thereby obstructing the detachable operation. Remove the dust.

In addition, each of the pressing fixtures 23 to 28 is provided with a positioning rod 45, and the tip thereof abuts against the projection 678 of the dama member 47 described later. It is supposed to keep a normal posture in combination. In addition, reference numeral 46 denotes a " ○ " ring provided around the supply port 39 of the pressing plate 16. As shown in FIG.

In addition, 47 is a damascene member set to the shape corresponding to the external shape of the to-be-tested object W, 48 is a shape corresponding to the external shape of the to-be-tested object different from the to-be-tested object W. The other damaging member set in the above, and these damaging members 47 and 48 are moved by the moving means 49 between the detection position and the retracted position. Specifically, the moving means 49 has a cylindrical member 50 placed on the right side of the base 1, and the rotating shaft 51 is provided on the cylindrical member 50. A shaft is inserted into the rotational material in the rotational direction, so that the lower end of the pair of guide pillar members 52 and 52 is connected to the upper end of the rotational shaft 51 via the support plate 53. have.

In addition, each guide holding member 52 is inserted into the study 56 penetrating the vertical direction of the pair of sliding tube portion 55 is installed in the frame member 54, the frame member 54 is shown It is supposed to be driven up and down by the operation of an ineligible elevation driver. The frame member 54 is provided with a fluid pressure cylinder 57 having a piston rod 57a extending in a horizontal direction in a horizontal direction, and on both sides of the fluid pressure cylinder 57, and the piston rod 57a. And a pair of guide cylinders 58, 58 having guide rods 58a extending in the direction of expansion and contraction in the rotational direction, and are arranged to expand and contract in a right angle direction. Then, the dama members 47 and 48 are laid at the ends of the rods 57a and 58a.

On the other hand, one end of the operation rod 59 is connected to the lower end of the rotation shaft 51, and the other end of the operation rod 59 is oscillated in the lower portion of the base 1. The frame member 54 is rotated by the expansion and contraction operation of the oscillation oscillation 60 by being fixed to the tip of the piston rod 60a extending in the horizontal direction of the 60. That is, each of the dama member 47 and 48 is moved up and down by the operation of the elevating drive source and the oscillating cylinder 60, and at the same time, it moves forward and backward by the operation of the fluid pressure cylinder 57. It is supposed to be manipulated.

Moreover, the said one damascene member 47 is provided with the 2nd attachment / detachment mechanism 61 which hold | maintains each press fixture 23-28 as a detachable material. The second attachment / detachment mechanism 61 is configured in the same manner as the first attachment / detachment mechanism 29 (the same reference numerals are given to the same components in the drawings, and the description thereof is omitted). (BALL) 37 is engaged with the flat part 31a of the engagement protrusion part 31 which protruded on the other side of (28), and each press jig is hold | maintained in the said dama member 47. do.

On the other hand, the second damascene member 48 is also provided with the second detachable mechanism 61, and the second detachable mechanism 61 seals and closes the opening of the inspected object having different sealing surface phenomena. The pressing jig 23'-28 'is hold | maintained.

And each of the pressing jig (23) (23 ') (28) (28') is moved from the retracted position to the detection position by the operation of the moving means 29, respectively, the pressing unit (10) to ( 15), the test of the test object W is carried out. In addition, after completion of the leak test, the turnover is turned over to the damier members 47 and 48.

Further, the seal lower surface of the inspection object W is provided in the pressing jig 28, 28 'according to the conveying direction. Is supported on both sides in the conveying direction in a state in which the support 63 in which the rotary material is condensed with the rotating material is added upward by the coil spring 64. That is, the pressing jig 28 (28 ') carries the inspected object W conveyed by the CONVEYER 4 into the detection position and simultaneously carries out the inspected object W after the end of the inspection. 6) It also has a return function for carrying out.

On the one side of the carrying-out conveyor 6, a carry-out seed 65 for discharging the defective inspected object W, in which gas leaks due to the detection, is carried out in a separate path from a regular carrying-out route. The defective inspection object W is carried out to the SHOT 66 provided on the other side of the carrying-out conveyor 6 by the extension operation of this carrying-out cylinder 65. As shown in FIG. On the side of the carrying-out chute 66 of the carrying-out conveyor 6, a stamping seedling (not shown) for marking a seal to discriminate a defective inspected object or a gas leak by inspection is provided. In addition, the carry-out chute 4 is provided with the carrying-out chute 67 which carries in from the carry-out chute 66 and carries it in to a detection position in order to detect the repaired inspected object W again.

Next, an example of use of the leak test apparatus of the above embodiment will be described.

(1) At first, the sealing surface of the inspected object (cylinder hat) W is contracted by each fluid pressure sealer 17 by the other press units 10 to 14 except for the press unit 15 to be pressed. Operation degenerates as shown by the solid lines in FIGS. 4 and 5.

In this state, the damascene member 47 set in a shape corresponding to the outer shape of the inspection object W to be detected by contracting the oscillating motion 60 of the moving means 49 to be detected from the retracted position is detected. After moving to the other side, the fluid pressure cylinder 57 is extended and the dama member 47 is moved above the detection position. At this time, the pressing member (30) having the pressing portion (30) for sealing the closing of the opening of the inspection object (W) to the dama member 47 is detached by the second detachment mechanism (61), respectively. It is kept as material.

Thereafter, the elevating drive source of the moving means 49 is lowered to operate the sliding body provided with the engaging projection 31 of the pressing tool 28 on the pressing plate 16 of the pressing unit 15. It inserts into the onslaught 34 of 35, and engages the ball 37 with the unfolding part 31a of the said engagement protrusion part 31 by the contracting operation of the seedling 33. As shown in FIG. . That is, holding | maintenance is performed to the press unit 15 by the 1st attachment / detachment mechanism 29 of the said press fixture 28. As shown in FIG.

(3) Next, the fluid pressure cylinder 17 of the press unit 15 is contracted and placed to place the dama member 47 in the detection position, and then the fluids of the other press units 10 to 14 are removed. By holding the pressing cylinder 17 in an extended operation and holding the holding units 10 to 14 of the pressing fixtures 23 to 27 by the first attachment / detachment mechanism 29 in the same operation as the electricity 2. Do it.

(4) After that, each of the first detachable mechanisms 61 and the seedlings 33 are extended to release the engaged state of the engaging projections 31 by the ball 37, and the lower pressing unit 15 is removed. The press plates 16 of the other press units 10 to 14, except for the above, are retreated to the position indicated by the solid line. The lifting drive source of the moving means 49 is operated up and down. The hydraulic pressure cylinder 57 is contracted to retract the dama member 47 as shown by the solid line in FIG.

(5) Next, the fluid pressure cylinder 17 of the lower press unit 15 is extended to raise the press plate 16, and then the test object W is pushed from the carry-on conveyor 4 to the press plate 16. Bring in

Then, the fluid pressure cylinder 17 of the lower pressing unit 15 is stretched and operated to place the inspected object W on the detection body, and then the other pressing units 10 to 14, 23 to 23. 28) seal the opening of the cavity (OILWAY, WATERJACKET, LOCKER ROOM, etc.) of the inspected object W (see FIGS. 1 to 3).

In this state, the supply port 39 of each press plate 16 and the supply passage 40 of each press tool 23-28 communicate with each other, and each press unit 10-15 is connected. The gas supplied from the () is sealed in the cavity of the inspection object W, and the leak test is performed.

(6) After that, as a result of the leak test, the good article in which gas leakage is not detected is guided to the carrying-out conveyor 6 and taken out to the outside, but the defective inspected object W in which the gas leakage is detected is operated by the operation of Cain Seedling. After imprinting, it is taken out to the carrying-out chute 66 by the extension operation of the carrying out cylinder 65, and after repairing a defective place, it is carried in to the carrying-in conveyor 4 from the carrying-in chute 67, and the inspection is performed again. .

(7) As described above, when the test object W is continuously tested while repeating the above-described operation, and the test object having a different seal face shape is detected, the first detachable mechanism is operated as opposed to the electric operation. 29) and each pressing jig 23 to 28 are taken over between the damaging member 47 and each of the pressing units 10 to 15 by means of the second attachment / detachment mechanism 61 thereafter. Each pressing jig 23 held in the dama member 48 by the same operation is moved from the retracted position to the detection position by the same operation as the electric machine 1, after the dama member 48 formed in a shape corresponding to the appearance of the inspected object. '28' to 28 'are taken over by the first detachable mechanism 29 and the second detachable mechanism 61 between the dama member 48 and the press units 10 to 15, and then inspect the object to be inspected. Perform a leak test.

Therefore, in the leak test apparatus of the above embodiment, in the leak test of a plurality of inspected objects W having different seal face shapes, the plurality of press fixtures having a press portion for sealing-closing the opening of each inspected object W ( 23) (23 ') to (28) and (28') are formed in a cavity corresponding to the shape of each test object (W), and a plurality of damaging members (47), (48) and the air in the cavity of the test object (W). Each of the pressing fixtures 23 (23 ') to (28) was taken over as the first detachable mechanism 29 and the second detachable mechanism 61 with the plurality of press units 10 and 15 for supplying the (28 ') is automated, so that the opening of each inspection object W can be sealed and closed quickly without bothering human hands, thereby improving the leak detection workability.

As described above, according to the leak test apparatus of the present invention, a first detachment mechanism and a second detachment mechanism for retaining a plurality of press fixtures as detachable materials between a damascene member and a press unit are provided to a plurality of inspected objects having different sealing surfaces. Since the pressing jig suitable for closing the opening can be quickly and automatically replaced with respect to the pressing unit, the leak detection workability can be improved.

Claims (1)

Leak test apparatus having a cavity opening to the outside and sealing each opening of a plurality of inspected objects having a different seal surface shape to detect a gas leak enclosed in the cavity. A plurality of press fixtures having a press section for sealing and closing the openings of the respective inspected objects, a plurality of press units arranged correspondingly to the seal surfaces of the inspected objects, and the press fixtures pressed against the seal surfaces of the inspected objects; A first detachment mechanism for holding each press fixture as a detachable material in each press unit, and a plurality of dama member and its dama member set in a shape corresponding to the weak appearance of the inspected object between the detection position and the evacuation position. And a second detachment mechanism for retaining each pressing jig as a detachable material on the movable means for moving and the dama member.

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