JP4529322B2 - Sealing tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealing tool used for airtight inspection of a heat exchanger such as a radiator of an automobile engine. For example, the present invention is airtightly connected to a tip portion of a tubular part such as an inlet / outlet pipe for a heat exchanger of various types The present invention relates to a sealing tool used by fitting.
[0002]
[Prior art]
Conventionally, as shown in FIG. 5 (a), as a device for firmly holding a heat exchanger inlet / outlet pipe 110 such as a radiator of an automobile engine, a collet or a ball made of a conical sleeve with a crack is used. There is a chuck device using. Further, in order to seal the heat exchanger inlet / outlet pipe 110 for airtightness inspection of the heat exchanger, sealing materials 112 to 114 such as O-rings are interposed in the gap between the heat exchanger inlet / outlet pipe 110. There is also a sealing tool 100.
[0003]
As shown in FIG. 5B, the sealing tool 100 includes a bottomed cylindrical tool body 101, a joint 102 connected to the tool body 101, and an inner diameter side cylindrical portion 103 of the tool body 101. An inner diameter side sleeve 104 fitted to the outer circumference, an outer diameter side sleeve 105 fitted to the outer circumference of the tool body 101, a slider 106 movable in the axial direction on the outer circumference of the outer diameter side sleeve 105, and an inlet / outlet pipe of the radiator An abutting member 107 that abuts on the outer peripheral convex portion 111 provided at the tip of 110 and a ball 109 that locks the outer peripheral convex portion 111 of the inlet / outlet pipe 110 are provided.
[0004]
[Problems to be solved by the invention]
However, as shown in FIGS. 5 (a) and 5 (b), the conventional sealing tool 100 is a dedicated tool corresponding only to the inlet / outlet pipe 110 of one type of bore diameter (inner diameter). When the inlet / outlet pipe 110 is chucked or sealed, it is necessary to prepare a dedicated tool corresponding to each caliber. Therefore, there is a problem that the total number of tools to be used increases.
[0005]
OBJECT OF THE INVENTION
An object of the present invention is to provide a sealing tool that can reduce the total number of tools to be used.
[0006]
[Means for Solving the Problems]
According to the invention described in claim 1, the sealing tool is provided on (a) the first sleeve portion to be inserted into the tubular component, and the outer peripheral side of the first sleeve portion, so as to contact the distal end portion of the tubular component. A tubular tool main body having a second sleeve portion in contact therewith, and (b) a radially inflatable / retractable attachment between the outer periphery of the first sleeve portion and the inner periphery of the second sleeve portion, so that fluid can flow inside. A sealing member that expands in the radial direction when inflowing and contacts the inner periphery of the tubular part; and (c) in the axial direction of the tool body, when the tubular part side is one end side and the anti-tubular part side is the other end side, A pin for holding and fixing the tubular part to the tool body sandwiched from the outer peripheral side of the tubular part on one end side of the two sleeve parts, and a pin provided on the outer periphery of the one end part of the second sleeve part to support the pins A holding member having support means; and (d) an outer peripheral side of the pin And a claw-like movable member that is provided so as to be reciprocally movable in the axial direction on the outer periphery of the second sleeve portion and presses the pin toward the inner diameter side in the radial direction as it moves toward one end side of the second sleeve portion. .
According to this, the first sleeve portion of the tubular tool body is inserted into the tubular part, and the claw-like movable member presses the holding member toward the radially inner side, so that the holding member locks the outer periphery of the tubular part. The tubular part is held, and when the fluid is put inside the sealing member, the sealing part expands in the radial direction and comes into contact with the inner periphery of the tubular part to be airtight, thereby holding the tubular part with various calibers. Can be fixed. In addition, it is possible to seal various kinds of tubular parts having different diameters. Thereby, since the number of the whole tool to be used can be reduced, cost reduction can be aimed at.
[0007]
According to the second aspect of the present invention, the claw-like movable member is attached to each of a tubular slider that moves slidably in the axial direction on the outer periphery of the second sleeve portion of the tool body, and one end of the slider. And a plurality of claw-like members. The plurality of claw-shaped members form a substantially conical internal space whose inner diameter increases as it goes toward one end of the second sleeve portion of the tool body, and the holding member is tubular on the substantially conical inner peripheral surface. It is characterized in that a convex / concave surface is provided to be bitten at a position corresponding to the diameter of the part.
[0008]
According to the third aspect of the present invention, when the slider is locked by the slider locking means, the slider stops at the other end side in the axial direction of the second sleeve portion of the tool body. Further, when the slider is released from the slider locking means, the slider moves to one end side of the second sleeve portion of the tool body by the biasing force of the slider biasing means. Further, the invention described in claim 4 is characterized in that the holding member has pin urging means for urging the pin supporting means toward the outer diameter side in the radial direction. Furthermore, according to the invention described in claim 5, a tubular heat exchanger inlet / outlet pipe for taking in and out liquid or gas into / from the heat exchanger may be used as the tubular part.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
[Configuration of the embodiment]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. Here, FIG. 1 is a diagram showing an overall configuration of a sealing tool used for an airtight inspection of a radiator of an automobile engine, and FIG. 2 is a diagram showing a radiator and a reserve tank.
[0010]
A sealing tool 2 used for airtight inspection of a radiator 1 of an automobile engine is used by being fitted to an inlet pipe 3 and an outlet pipe 4 of the radiator 1. Here, the water-cooled engine cooling device is a system in which a water jacket is provided around a cylinder block and a cylinder head of an automobile engine, and the water jacket and the radiator 1 provided on the front surface of the automobile engine are guided and cooled. .
[0011]
The radiator 1 corresponds to a heat exchanger according to the present invention, and is cooled by cooling air generated by a fan driven by an automobile engine or an electric fan driven by electricity, or traveling air generated by traveling of the automobile. . The radiator 1 includes a core unit 10 that cools each part of an automobile engine by cooling the heated cooling water with the surrounding air and cools it, an upper tank 11 connected to the upper end of the core unit 10 in the figure, and The lower tank 12 is connected to the lower end of the core 10 in the figure.
[0012]
The core portion 10 is formed in a state where a metal tube 13 through which cooling water flows and a metal corrugated fin 14 for improving the heat dissipation performance of the radiator 1 are stacked in the horizontal direction. And the upper end part and lower end part of each tube 13 are brazed to the core plate 15 in the state inserted in the long hole (not shown) formed in the metal core plates 15 respectively arranged up and down. It is joined.
[0013]
The upper tank 11 and the lower tank 12 are integrally formed into a predetermined shape by, for example, a thermoplastic polyamide resin, and communicate with the water jacket of the automobile engine via the cooling water pipes 5 and 6. Here, the seal portions of the upper tank 11 and the lower tank 12 are liquid-tightly fixed to the core plate 15 by bending and caulking the outer peripheral edge of the core plate 15. In addition, between the seal parts of the upper tank 11 and the lower tank 12 and the core plate 15, each annular rubber elastic sealing material (not shown) for preventing leakage of cooling water is mounted.
[0014]
Standing wall portions 21 are integrally formed on both sides in the longitudinal direction of the ceiling portion 20 of the upper tank 11, and a circular pipe-shaped inlet connected to the cooling water pipe 5 is formed on the outer wall surface of the standing wall portion 21 on one side. The pipe 3 is provided so as to protrude forward. In addition, a circular pipe-shaped supply pipe 23 to which the radiator cap 22 is detachably attached is provided on the outer wall surface of the top part of the substantially central part of the ceiling part 20. Reference numeral 8 denotes a convex portion for forming an air discharge passage (not shown) for guiding the air mixed into the upper tank 11 from the inlet pipe 3 to the radiator cap 22.
[0015]
The radiator cap 22 is made of metal and is fastened and fixed to the outer periphery of the distal end portion of the supply pipe 23 of the upper tank 11. The radiator cap 22 includes a relief valve (pressurizing valve) and a vacuum valve (negative pressure valve). A reserve tank 25 is connected to the supply pipe 23 via an overflow pipe 24. A circular outlet pipe 4 connected to the cooling water pipe 6 is provided on the outer wall surface of the ceiling portion of the lower tank 12 so as to protrude forward. In addition, convex ring portions (outer peripheral convex portions) 26 are provided at the distal ends of the heat exchanger inlet and outlet pipes 3 and 4 such as the inlet pipe 3 and the outlet pipe 4 to prevent the cooling water pipes 5 and 6 from coming off. It has been.
[0016]
Next, the structure of the sealing tool 2 of this embodiment will be briefly described with reference to FIGS. Here, FIG. 3 and FIG. 4 are views showing a usage state of the sealing tool 2 used for the airtight inspection of the radiator 1 of the automobile engine.
[0017]
The sealing tool 2 includes a circular tool body 31 that is used by being hermetically fitted to an inlet / outlet pipe for a heat exchanger such as an inlet pipe 3 and an outlet pipe 4, and a radial direction when compressed air (fluid) flows therein. A bag-like rubber packing 32 that swells and contacts the inner periphery of the heat exchanger inlet / outlet pipe, and a plurality (three in this example) of holding members 33 supported on the outer peripheral side of the tool body 31 so as to be movable in the radial direction. And a claw-like movable member 34 provided so as to be reciprocally movable in the axial direction on the outer periphery of the tool main body 31.
[0018]
The tool body 31 includes a tubular sleeve (first sleeve portion) 35 inserted into the distal end portion of the inlet / outlet pipe for heat exchanger, a tubular holder (second sleeve portion) 36 provided on the outer peripheral side of the sleeve 35, And an adapter 37 attached to the right end side (rear end side) of the sleeve 35 and the right end side (rear end side) of the holder 36 in the drawing. Here, between the outer periphery of the right end portion (rear end portion) of the sleeve 35 and the inner periphery of the left end portion (front end portion) of the adapter 37, compressed air and a gas such as helium gas are mixed. A sealing material 38 such as an O-ring for preventing is attached. Between the inner periphery of the rear end portion of the holder 36 and the outer periphery of the front end portion of the adapter 37, an O-ring or the like for preventing leakage of compressed air to the outside is provided. A sealing material 39 is attached.
[0019]
A gas passage 40 through which a gas such as helium gas (He) can flow is formed in the sleeve 35. Two guide pins 42 are fitted into a stopper ring portion 41 provided at the distal end portion of the sleeve 35 in the axial direction. A male screw portion 35 a into which the adapter 37 is screwed is formed on the outer periphery of the rear end portion (right end portion in the drawing) of the sleeve 35 in the axial direction. The holder 36 is provided with a cylindrical sliding portion 43 on which the claw-like movable member 34 slides on the outer peripheral surface in the axial direction. Further, an annular projecting portion 44 with which the distal end portion of the heat exchanger inlet / outlet pipe abuts is provided at the distal end portion (left end portion in the drawing) of the holder 36 in the axial direction.
[0020]
A female threaded portion 37 a that is screwed into the male threaded portion 35 a of the sleeve 35 is provided on the annular projecting portion of the adapter 37. An air passage 45 through which compressed air can flow is formed between the sleeve 35 and the adapter 37. Further, inside the adapter 37, a communication passage 46 that communicates with the gas passage 40 of the sleeve 35 and a communication passage 47 that communicates with the air passage 45 are provided. Here, the communication passages 46 and 47 include an axial hole and a radial hole. A female screw portion 46a into which a joint (not shown) with a gas injection device for injecting a gas such as helium gas into the radiator 1 is screwed is formed on the outlet side of the radial hole of the communication passage 46. Has been. Further, on the outlet side of the radial hole of the communication passage 47, a female thread portion into which a joint (not shown) with a compressed air injection device for injecting compressed air into the internal space 49 of the rubber packing 32 is screwed. 47a is formed.
[0021]
The rubber packing 32 corresponds to the sealing member of the present invention, and is mounted between the sleeve 35 and the holder 36 so as to be elastically deformable at least in the radial direction (radial direction), and the bag-like double side wall is formed in a circular tube shape. It is a provided seal rubber. The inner side wall of the bag-like double side wall of the rubber packing 32 is sandwiched and held between the rear end of the ring 48 and the large diameter portion of the sleeve 35, and the bag-like double side wall of the rubber packing 32. The outer wall is sandwiched and held between the inner peripheral convex portion of the holder 36 and the front end of the ring 48. The compressed air enters the cylindrical internal space 49 of the rubber packing 32 through the air passage 45 and the communication passage 47. The rubber packing 32 does not swell toward one end in the axial direction due to the presence of the stopper ring portion 41.
[0022]
The plurality of holding members 33 hold and fix (chuck) the tip of the heat exchanger inlet / outlet pipe from the upper side (outer peripheral side) of the tip of the heat exchanger inlet / outlet pipe in the figure (three in this example). ) Pins (locking members, chuck members) 51, a plurality of pin holders 52, 53 that respectively support these pins 51, and these pin holders 52, 53 are attached to the upper side (outer diameter side) in the radial direction in the figure. It comprises a plurality of coil springs 54, 55 and the like. The plurality of pins 51 are formed in a columnar shape, and are rotatably supported on the outer peripheral side of the distal end portion of the holder 36 of the tool main body 31, and are rotated with respect to the pair of pin holders 52 and 53 ( It is attached between a pair of pin holders 52 and 53 so as to be capable of turning.
[0023]
The pair of pin holders 52 and 53 are rotatably attached to outer peripheral convex portions 56 and 57 provided on the outer periphery of the distal end portion of the holder 36 of the tool body 31. Here, the plurality of coil springs 54 and 55 correspond to the pin urging means of the present invention, and one end portion (the outer diameter side end portion in the radial direction) is held by the pair of pin holders 52 and 53, respectively. The other end (the inner diameter side end in the radial direction) is held by a plurality of concave portions 58 and 59 provided on the outer periphery of the tip of the holder 36 of the tool body 31.
[0024]
The claw-like movable member 34 includes a tubular slider 61 that moves along the outer peripheral surface of the sliding portion 43 so as to be slidable in the axial direction along the outer peripheral surface of the sliding portion 43 of the holder 36 of the tool body 31, and this slider. A plurality of (three in this example) claw-like members 62 respectively attached to one end of 61, a contact coil spring 63 for biasing the slider 61 toward one end in the axial direction of the sliding portion 43 of the holder 36, a tool The main body 31 includes a stay 64 that extends in the axial direction from the lower end of the adapter 37 in the figure, a release lever 65 that is rotatably supported at the tip of the stay 64, and the like.
[0025]
An annular projection 67 that is detachably engaged with the release lever 65 is formed on the outer periphery of the circular tubular portion 66 of the slider 61. The plurality of claw-like members 62 are arranged at equal intervals in the circumferential direction of the outer periphery of the circular tubular portion 66 of the slider 61, and fasteners such as bolts 68 and 69 are used on the outer periphery of the circular tubular portion 66 of the slider 61. Tightened and fixed. A plurality of claw-shaped members 62 are formed with a substantially conical internal space 70 whose inner diameter increases toward the distal end in the axial direction. The substantially conical inner peripheral surface is provided with a concave / convex surface such as a sawtooth surface in which the plurality of pins 51 of the holding member 33 mesh with each other at a position (concave portion) corresponding to the diameter of the inlet / outlet pipe for heat exchanger. Yes.
[0026]
Here, the contact coil spring 63 corresponds to the slider urging means of the present invention, and has a cylindrical shape in which an axial tip portion (the left end portion in the drawing) is provided on the inner peripheral side of the protrusion portion 67 of the slider 61. It is held by the groove portion 71 and the rear end portion (right end portion in the drawing) in the axial direction is held by a spring receiving member 72 provided on the front wall surface of the adapter 37. The spring receiving member 72 is fastened and fixed to the front wall surface of the adapter 37 by using a fastener such as a bolt 73.
[0027]
Release lever 65, the pin 74 of cylindrical shape fixed to the stay 64 is rotatably supported, in the axial direction of the rear end of the sliding portion 43 of the Holder 36, the protrusion 67 is the adapter 37 of the slider 61 The protrusion 67 of the slider 61 is locked in contact with the front wall surface. The release lever 65 is pressed to the locking side, that is, the protrusion 67 side of the slider 61 by a plurality of coil springs (lever urging means) 75 and 76.
[0028]
[Airtight inspection method of embodiment]
Next, an airtightness inspection method for the radiator 1 of the automobile engine according to the present embodiment will be briefly described with reference to FIGS.
[0029]
First, the cylindrical sleeve 35 of the tool main body 31 of the sealing plug tool 2 and the bag-shaped and cylindrical rubber packing 32 which is airtightly attached to the outer periphery of the sleeve 35 are connected to the inlet pipe 3 and the outlet of the radiator 1 of the automobile engine. Fit into the inlet / outlet pipe for heat exchanger made of pipe 4. At this time, in the heat exchanger inlet / outlet pipe until the tip of the heat exchanger inlet / outlet pipe comes into contact with the tip of the projection 44 provided on the tip (left end in the figure) of the cylindrical holder 36 of the tool body 31. The sleeve 35 and the rubber packing 32 of the sealing plug tool 2 are inserted into the plug.
[0030]
Next, the operator presses the illustrated left end portion of the release lever 65 upward in the drawing against the urging force of the plurality of coil springs 75, 76, whereby the engagement between the release lever 65 and the protrusion 67 of the slider 61. The slider 61 that is in contact with the front wall surface of the adapter 37 is released from the combined state, and the sliding portion 43 of the holder 36 is moved to one end side in the axial direction (the left end side in the drawing) by the urging force of the contact coil spring 63. Moving. As a result, the plurality of claw-like members 62 that operate integrally with the slider 61 are made to act against the urging force of the plurality of coil springs 54, 55 by the action of the substantially conical inner peripheral surface, A plurality of pins 51 supported by 53 are pressed to the inner diameter side in the radial direction.
[0031]
At this time, the plurality of pins 51 are located in recesses corresponding to the diameter of the heat exchanger inlet / outlet pipe on the inner peripheral surfaces (sawtooth-shaped surfaces) of the plurality of claw-like members 62. The plurality of pins 51 are engaged in the vicinity of the convex ring portion 26 provided on the outer periphery of the distal end portion of the heat exchanger inlet / outlet pipe. Therefore, the tip of the heat exchanger inlet / outlet pipe can be held and fixed (chucked) by the plurality of claw-like members 62 and the plurality of pins 51 of the sealing plug tool 2.
[0032]
Next, compressed air (for example, 3.5 kgf / cm ² ) is introduced into the cylindrical inner space 49 of the rubber packing 32 of the sealing plug tool 2 from a joint (not shown) via the air passage 45 and the communication passage 47, and the rubber packing. 32 is inflated to the outer diameter side in the radial direction. As a result, as shown in FIG. 4, the outer wall of the rubber packing 32 is in close contact with the inner peripheral surface of the distal end portion of the heat exchanger inlet / outlet pipe. By performing this operation on both the inlet pipe 3 and the outlet pipe 4 of the radiator 1, the radiator 1 is sealed (airtight).
[0033]
Next, the radiator 1 in which the sealing tool 2 is hermetically fitted to both the inlet pipe 3 and the outlet pipe 4 is placed in an airtight inspection chamber, the airtight inspection chamber is sealed, and the airtight inspection chamber is evacuated. Next, a gas such as helium gas (for example, 1.4 kgf / cm ² ) is injected into the radiator 1 through the gas passage 40 of the tool body 31 of the sealing plug tool 2 attached to both or one of the inlet pipe 3 and the outlet pipe 4. To do. After a while, the presence or absence of a gas such as helium gas in the airtight inspection chamber is checked. If a gas such as helium gas is detected, it is determined that there is a leak in the radiator 1 and if there is no gas, there is no leak. Next, after releasing the vacuum in the airtight inspection chamber and taking out the radiator 1 from the airtight inspection chamber, the compressed air in the internal space 49 of the rubber packing 32 of the sealing plug tool 2 is extracted, and the inlet pipe 3 and the outlet pipe 4 of the radiator 1 are discharged. Remove the sealing tool 2 from the container.
[0034]
[Effect of the embodiment]
As described above, in the sealing plug tool 2 used for the airtight inspection of the radiator 1 of the automobile engine of the present embodiment, the heat exchanging inlet / outlet pipes of various types of diameters can be held and fixed, Since the inlet / outlet pipe for heat exchange with the diameter can be sealed (airtight), the airtight inspection of the radiator 1 is performed without preparing various kinds of dedicated tools corresponding to the inlet / outlet pipe for heat exchange with various diameters. be able to. Thereby, since the number of the whole tool to be used can be reduced, cost reduction can be aimed at.
[0035]
[Other Embodiments]
In the present embodiment, a substantially conical inner space 70 having an inner diameter that increases toward the tip end side in the axial direction is formed in the plurality of claw-like members 62, and a tool is formed on the substantially conical inner peripheral surface. A plurality of pins 51 rotatably supported by a cylindrical holder 36 of the main body 31 are provided with a saw-toothed surface in which the pins 51 are engaged with each other at a position corresponding to the diameter of the inlet / outlet pipe for the heat exchanger. An uneven surface such as a stepped surface or a corrugated surface may be provided on the surface.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an overall configuration of a sealing tool used for an airtight inspection of a radiator of an automobile engine (embodiment).
FIG. 2 is a perspective view showing a radiator and a reserve tank of an automobile engine (embodiment).
FIG. 3 is a schematic view showing a use state of a sealing tool (embodiment).
FIG. 4 is a schematic view showing a use state of the sealing tool (embodiment).
FIG. 5A is a cross-sectional view showing a tip portion of a heat exchanger inlet / outlet pipe, and FIG. 5B is a cross-sectional view showing an entire configuration of a sealing plug tool (prior art).
[Explanation of symbols]
1 Radiator (heat exchanger)
2 Seal plug tool 3 Inlet pipe (heat exchanger inlet / outlet pipe)
4 Outlet pipe (entrance / exit pipe for heat exchanger)
31 Tool body 32 Rubber packing (sealing member)
33 Holding member 34 Claw-shaped movable member 35 Sleeve (first sleeve portion)
36 Holder (second sleeve)
54 Coil spring (pin biasing means)
55 Coil spring (pin biasing means)
61 Slider 62 Claw-shaped member 63 Close coil spring (slider biasing means)
65 Release lever (slider locking means)

Claims (5)

(A) a tubular tool body having a first sleeve portion to be inserted into the tubular component, and a second sleeve portion provided on the outer peripheral side of the first sleeve portion and in contact with the distal end portion of the tubular component;
(B) It is attached between the outer periphery of the first sleeve portion and the inner periphery of the second sleeve portion so as to be freely expandable / contractable in the radial direction. A sealing member in contact with the circumference;
(C) In the axial direction of the tool body, when the tubular component side is one end side and the anti-tubular component side is the other end side,
A pin for holding and fixing the tubular part to the tool body sandwiched from an outer peripheral side of the tubular part on one end side of the second sleeve part, and an outer periphery of one end part of the second sleeve part Holding members having pin support means for supporting the pins ;
(D) with provided on the outer peripheral side of the pin, said outer circumference of the second sleeve part is provided to be reciprocated in the axial direction, the more second moves to one end of the sleeve portion, radially said pin A capping tool provided with a claw-like movable member that is pressed into the inner diameter side. The sealing tool according to claim 1,
The claw-like movable member has a tubular slider that moves slidably in the axial direction on the outer periphery of the second sleeve portion, and a plurality of claw-like members attached to one end of the slider,
The plurality of claw-shaped members form a substantially conical internal space whose inner diameter increases toward the one end side of the second sleeve portion, and the holding member is formed on the tubular component on the substantially conical inner peripheral surface. A sealing tool characterized by having a concave and convex surface to be bitten at a position corresponding to the diameter of the plug. The sealing tool according to claim 2,
The claw-like movable member includes a slider biasing means for biasing the slider toward one end of the second sleeve portion;
And a slider locking means for locking the slider on the other end side of the second sleeve portion against the biasing force of the slider biasing means ,
When the slider locking means is released, the slider moves to one end side by the biasing force of the slider biasing means, and the claw-like member presses the pin toward the radially inner diameter side by the inner peripheral surface. Characteristic sealing tool. In the sealing tool in any one of Claims 1 thru | or 3,
The holding member is sealed tool, characterized in that it has a pin biasing means for biasing the outer diameter side of the front Symbol pin support means in the radial direction. In the sealing tool in any one of Claims 1 thru | or 4,
The sealing tool according to claim 1, wherein the tubular part is a tubular heat exchanger inlet / outlet pipe for taking liquid or gas into and out of the heat exchanger.

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