JP2013230515A - Method and device for assembling component to through-hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for assembling a component to a through-hole, capable of assembling a component to a through-hole with high accuracy while preventing a foreign matter from adhering to the through-hole.SOLUTION: Air is blown toward a tapered surface 7a of an injector mount hole 7 so that an airflow caused by the tapered surface 7a prevents a foreign matter from adhering to the injector mount hole 7 while removing a foreign matter adhering to the injector mount hole 7. Injectors 2A-2D are assembled to the injector mount hole 7 while performing the blowing operation.

Description

  The present invention relates to a method and an apparatus for assembling components into a through hole, such as assembling an injector into an injector mounting hole of a cylinder head of a direct injection engine.

  In a direct injection engine mounted on a vehicle such as an automobile, the injector of the direct injection injector unit is press-fitted into a plurality of injector mounting holes formed in a cylinder head, and fuel is directly injected into the combustion chamber. If a foreign object is caught when the injector is installed in the injector mounting hole of the cylinder head, it may cause quality defects such as pressure leakage of the injector seal portion. For this reason, conventionally, the process of cleaning the injector mounting hole is performed before the process of mounting the injector, and in the transport process from the cleaning process to the mounting process, a tunnel for foreign matter shut-out is provided and work is performed until just before the mounting process. The person is isolated from the work.

  Patent Document 1 devises a technique that allows air blower pitch to be changed and air blow cleaning a plurality of bore cylindrical holes of a cylinder head at the same time.

JP 2007-319765 A

  However, with the conventional method of assembling the injector, foreign objects such as the operator's hair, lint of clothes, and suspended matter floating in the atmosphere can still enter the injector mounting hole during the mounting process. There was room for improvement. Moreover, in the technique described in Patent Document 1, cleaning of the bore cylindrical hole is performed, and cleaning of the injector mounting hole is not considered.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a through hole capable of assembling a component with a high accuracy while preventing foreign matter from adhering to the through hole. An object of the present invention is to provide an assembling method and an assembling apparatus for parts.

In order to achieve the above object, the invention according to claim 1
Parts (for example, injectors 2A to 2D in embodiments described later) are formed in through holes (for example, injector mounting holes 7 in embodiments described later) in which tapered surfaces (for example, tapered surfaces 7a in the embodiments described later) are formed at the ends. ) Is a method of assembling the parts into the through holes,
By blowing gas toward the tapered surface of the through-hole, the foreign matter attached to the through-hole is removed, and the foreign matter is prevented from adhering to the through-hole due to the air flow wound up by the tapered surface. Process,
Assembling the components in the through hole while performing the spraying step;
It is characterized by providing.

In addition to the configuration of claim 1, the invention according to claim 2
The component is an injector (for example, injectors 2A to 2D in the embodiments described later),
The through hole is an injector mounting hole (for example, an injector mounting hole 7 in an embodiment described later) formed in a cylinder head (for example, a cylinder head 8 in an embodiment described later).

In addition to the structure of claim 2, the invention according to claim 3
The injector is held by an injector holding unit (for example, an injector holding unit 12 in an embodiment described later) that moves toward the injector mounting hole.
A gas spray nozzle that blows the gas (for example, a gas spray nozzle 71 in an embodiment described later) is provided in the injector holding unit.

In addition to the configuration of claim 3, the invention according to claim 4
The gas spray nozzle is mounted obliquely upward with respect to the tip end portion of the injector and the injector mounting hole.

The invention according to claim 5
A device for assembling a component into a through hole for assembling a component into a through hole having a tapered surface at the end,
While removing the foreign matter adhering to the through hole, gas is blown toward the tapered surface of the through hole so as to prevent the foreign matter from adhering to the through hole by the air flow wound up by the tapered surface. A cleaning device having a gas blowing nozzle for
An insertion unit for inserting the component into the through hole (for example, an insertion unit 13 in an embodiment described later);
It is characterized by providing.

In addition to the structure of Claim 5, the invention according to Claim 6
The component is an injector;
The through hole is an injector mounting hole formed in the cylinder head.

The invention according to claim 7 includes, in addition to the configuration of claim 6,
An injector holding unit that holds the injector and moves toward the injector mounting hole by the insertion unit;
The gas spray nozzle is provided in the injector holding unit.

In addition to the structure of claim 7, the invention according to claim 8
The gas spray nozzle is mounted obliquely upward with respect to the tip end portion of the injector and the injector mounting hole.

  According to the first and fifth aspects of the present invention, air is blown toward the tapered surface provided at the end portion of the through-hole to remove foreign matter in the vicinity of the through-hole and inside the through-hole, and the air flow wound up by the tapered surface. Thus, foreign matter can be prevented from adhering to the through-hole, and the component can be assembled to the through-hole with high accuracy without the foreign matter biting.

  According to invention of Claim 2 and 6, it can prevent that a foreign material adheres to an injector attachment hole, and can attach an injector to an injector attachment hole with high precision.

  According to the third and seventh aspects of the invention, when the injector is inserted into the injector mounting hole, the gas blowing nozzle can be moved simultaneously, and the injector can be effectively blown without blowing the nozzle separately. Can be inserted.

  According to the fourth and eighth aspects of the present invention, when the injector is inserted into the injector mounting hole, the gas is blown toward the tip of the injector and the injector mounting hole, and the flow of the gas is controlled from one direction so that the foreign matter penetrates. It can prevent adhering to a hole.

(A) is sectional drawing which followed the II injection line of FIG. 3 about the direct-injection injector unit assembly | attachment apparatus to which the assembly | attachment method and assembly | attachment apparatus of the components to the through-hole of this invention are applied, (b ) Is an enlarged cross-sectional view of a portion I ′ in FIG. It is a top view of the assembly apparatus shown in FIG. It is a front view of the assembly | attachment apparatus shown in FIG. (A) is an expanded sectional view of the injector mounting hole showing the gas flow in the vicinity of the injector mounting hole and the foreign matter before being removed, and (b) is an enlarged sectional view showing a state in which the foreign matter is removed. .

  Hereinafter, an assembly method and an assembly apparatus for a direct injection injector unit according to an embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 3, the direct injection injector unit 1 assembled to the cylinder head in this embodiment includes a plurality of (four in this embodiment) injectors 2 </ b> A to 2 </ b> D and a plurality of injectors 2 </ b> A to 2 </ b> D. And at least a fuel pipe 4 fixed in a predetermined direction in a plane orthogonal to the axial direction. The fuel inlet side end portions 3 of the plurality of injectors 2 </ b> A to 2 </ b> D are fitted into cup portions 5 formed at predetermined intervals around a fuel pipe 4 that extends linearly. Each cup portion 5 is provided with a substantially triangular flange portion 6 at an upper portion thereof. Each of the injectors 2 </ b> A to 2 </ b> D is provided with an injector clip 60, which is a plate-like spring for pressing the injectors 2 </ b> A to 2 </ b> D against the cylinder head 8, below the cup portion 5. Further, a tolerance ring 61 that is a washer for floating each injector 2A to 2D on the seating surface on the cylinder head 8 side when fitted into the cylinder head 8 is fitted in each injector 2A to 2D. As shown in FIG. 1B, the tolerance ring 61 has a curved surface 61a that comes into contact with the tapered outer peripheral surface 62 of each injector 2A to 2D, and slides in the radial direction with respect to the injectors 2A to 2D. Is allowed. When each of the injectors 2 </ b> A to 2 </ b> D is inserted into the cylinder head 8, the tolerance ring 61 comes into contact with the seating surface of the cylinder head 8, and each of the injectors 2 </ b> A to 2 </ b> D is inserted with an inclination relative to the cylinder head 8. Absorbs the unbalanced load.

  In such a direct injection injector unit 1, each of the injectors 2 </ b> A to 2 </ b> D is press-fitted into the injector mounting hole 7 of the cylinder head 8 and assembled to the cylinder head 8. In the present embodiment, the plurality of injectors 2 </ b> A to 2 </ b> D are attached to the fuel pipe 4 with the axial direction of the injectors 2 </ b> A to 2 </ b> D oriented in the vertical direction (hereinafter referred to as “Z direction”). The plurality of injectors 2A to 2D are also referred to as first to fourth injectors 2A to 2D in order from the left in FIG.

  The direct injection injector unit assembling apparatus 10 includes a head mounting table 11 for mounting the cylinder head 8 in a predetermined posture, an injector holding unit 12 for holding the direct injection injector unit 1, and the holding unit 12. The insertion unit 13 for inserting the injectors 2 </ b> A to 2 </ b> D of the direct injection injector unit 1 into the injector mounting hole 7, the injector holding unit 12, and four holding parts (described later) of the injector holding unit 12, which are arranged between the injector holding unit 12 and the insertion unit 13 And a pitch changing unit 14 that changes the pitches of 12A to 12D in accordance with the arrangement direction pitch of the injectors 2A to 2D.

  The head mounting table 11 has a plurality of injector mounting holes 7 arranged in a reference direction (hereinafter referred to as “X direction”) in a horizontal plane, and the cylinder head 8 in a posture in which each injector mounting hole 7 is directed in the Z direction. It is comprised so that it may mount. The head mounting table 11 shown in FIG. 1 is shown in a simplified manner, and a known one is applied.

  The insertion unit 13 includes a Z movable table 23 that is movable in the Z direction with respect to the base 21, a Z direction linear guide 22 that guides the Z movable table 23 in the Z direction, and a Z movable table 23 that is not illustrated. A Z driving device. The Z-direction linear guide 22 includes a guide rail 22a fixed to the Z movable base 23 along the Z direction, and a slider 22b fixed to the base 21 and slidably laid over the guide rail 22a. .

  As a result, the Z driving device is driven to move the Z movable base 23 in the Z direction (downward) together with the injector holding unit 12, so that a plurality of injectors 2 </ b> A to 2 </ b> D, which are parts held by the injector holding unit 12. Is inserted into the injector mounting hole 7 of the cylinder head 8 as a through hole.

  The pitch changing unit 14 is arranged side by side in the X direction, and four X movable stands 25A, 25B, 25C, and 25D that can change the pitch in the X direction with respect to the Z movable stand 23, and the X movable stands 25A and 25B. , 25C and 25D in the X direction, and an X driving device (not shown) for driving the X movable bases 25A, 25B, 25C and 25D. The X-direction linear guide 24 is fixed to the pair of guide rails 24a fixed to the Z movable table 23 along the X direction and to each of the X movable tables 25A, 25B, 25C, and 25D, and is slidable on the guide rail 24a. And a slider 24b straddling the cable. Thereby, the assembly apparatus 10 can respond to a plurality of types of cylinder heads 8 having different pitches of the injector mounting holes 7.

  The injector holding unit 12 includes four holding portions 12A to 12D attached to the X movable stands 25A to 25D, respectively. Each holding part 12A-12D is provided with the injector mounting base 26 extended in the Y direction (left-right direction in FIG. 1) orthogonal to X direction from each X movable stand 25A-25D. The injector mounting base 26 has a lower portion extending forward, and the extended portion constitutes an injector mounting portion 27. A pair of guide rods 30 are erected on the extended portion of the injector mounting table 26. A plurality (four in this embodiment) of U-shaped grooves 28 that open forward are formed in the injector mounting portion 27 side by side in the X direction (see FIG. 2). The cup portion 5 of the fuel pipe 4 is opposed to the U-shaped groove 28 with a slight gap, and the flange portion 6 is placed on the support surface 27 a of the injector mounting portion 27 around the U-shaped groove 28. By placing, the direct injection injector unit 1 is mounted on the injector mounting table 26 so that slight movement is allowed on the support surface 27a.

  When the injectors 2A to 2D are inserted into the U-shaped grooves 28, the injector mounting portions 27 of the holding portions 12B and 12D come into contact with the Y-direction end surfaces of the flange portions 6 of the second and fourth injectors 2B and 2D. Thus, a positioning member 29 for correcting the tilt error of the third injector 2C, which is the reference injector, is disposed (see FIG. 2).

  Thereby, when the direct injection injector unit 1 is mounted on the support surface 27a of the injector mounting portion 27 and positioned in the Z direction, the second and fourth injectors 2B and 2D mounted on the holding portions 12B and 12D. The direct-injection injector unit 1 is corrected so that the inclination error of the reference injector 2C is corrected, that is, the arrangement direction of the injectors 2A to 2D is along the X direction of the injector holding unit 12. Is retained.

  These positioning members 29 have a groove depth D1 of the U-shaped groove 28 of the injector mounting portion 27 in the holding portions 12B and 12D, and a groove of the U-shaped groove 28 of the injector mounting portion 27 in the holding portions 12A and 12C. It is shallower than the depth D2. Therefore, the positioning unit that corrects the tilt error of the reference injector 2C determines the depth of the U-shaped groove 28 of the injector mounting unit 27 in the holding units 12B and 12D, and the U of the injector mounting unit 27 in the holding units 12A and 12C. It may be configured by being formed shallower than the depth of the letter-shaped groove 28.

  A pipe pressing member 31 is slidably attached to the pair of guide rods 30. A connecting rod 32 that is driven in the Z direction by an air cylinder (not shown) fixed to the X movable bases 25A to 25D is connected to the pipe pressing member 31. The pipe pressing member 31 is guided by the operation of the air cylinder. It is guided by the rod 30 and moves in the Z direction.

  A reverse U-shaped groove 33 for escape is formed on the lower surface of the pipe pressing member 31 at a position corresponding to the fuel pipe 4 mounted on the injector mounting portion 27. Therefore, when the pipe pressing member 31 is lowered by the air cylinder, the fuel pipe 4 is surrounded by the inverted U-shaped groove 33 and pressed by the tip of the inverted U-shaped groove 33 and the support member 33a.

  In addition, an air cylinder column 34 that supports the air cylinder 40 is erected on the pipe pressing member 31 of the holding portion 12C. One end of the air cylinder 40 is supported so as to be swingable around a pin 41 provided on the air cylinder column 34.

  One arm 35a of the L-shaped member 35 is pivotally supported at the front end of the pipe pressing member 31 of the holding portion 12C, and the L-shaped member 35 is supported so as to be swingable and rotatable. Further, the other arm 35 b of the L-shaped member 35 is pivotally supported by the piston rod 42 of the air cylinder 40. Further, a presser pin holder 38 is fixed to the other arm 35 b of the L-shaped member 35, and a pair of pipe presser pins 37 are slidably fitted into the presser pin holder 38. A coil spring 39 is mounted between the flange 37a formed at the tip of the pipe pressing pin 37 and the pressing pin holder 38 to urge the pipe pressing pin 37 indicated by the solid line downward.

  Each of the holding portions 12A to 12D includes a chuck mechanism 53 on the lower surface of the injector mounting table 26, respectively. Each chuck mechanism 53 includes a chuck air cylinder 46 fixed to the lower surface of the injector mounting table 26, and a direction in which the chuck air cylinder 46 is separated or approached by being guided by the pair of linear guides 45 by the operation of the chuck air cylinder 46 (X A pair of gripping arms 47 that can move linearly in the direction).

  The pair of gripping arms 47 are positioned on both sides in the X direction of the injectors 2A to 2D mounted on the injector mounting portion 27, and grip both side surfaces of the injectors 2A to 2D from the X direction. The gripping surfaces of the pair of gripping arms 47 that are in contact with the injectors 2A to 2D are formed in a substantially V shape facing each other in plan view, and can hold the cylindrical injectors 2A to 2D while positioning them.

  The width (vertical width in FIG. 3) of the pair of gripping arms 47 that grip the side surfaces of the injectors 2A to 2D varies depending on the holding portions 12A to 12D. Specifically, the width of the pair of gripping arms 47 disposed in the remaining holding portions 12A, 12B, and 12D with respect to the width W1 of the pair of gripping arms 47 disposed on the holding portion 12C and gripping the reference injector 2C. W2 is narrower.

  Accordingly, when the pair of gripping arms 47 grips the injectors 2A to 2D, the reference injector 2C is gripped by the pair of gripping arms 47 having a wide gripping width W1 and positioned in the horizontal plane. On the other hand, the remaining injectors 2A, 2B, and 2D are gripped by a pair of gripping arms 47 having a narrow gripping width W2, and the tip portions of the injectors 2A, 2B, and 2D are guided in a movable state.

  The chuck mechanism 53 positions the reference injector 2C when the pair of gripping arms 47 grips the injectors 2A to 2D, and guides the remaining injectors 2A, 2B, and 2D in a state where their tip portions are movable. Any configuration can be used. For example, by adjusting the pressure of the air cylinder 46 to make the gripping force of the injectors 2A, 2B, and 2D weaker than the gripping force of the injector 2C, the tip portions of the injectors 2A, 2B, and 2D are guided in a movable state. May be.

  Further, a cleaning device 70 having a gas blowing nozzle 71 for blowing air (gas) is attached to the side surface of the injector mounting table 26. The gas spray nozzle 71 of the cleaning device 70 is located at a position where it does not interfere with the cylinder head 8 or the direct injection injector unit 1 when inserting the injectors 2A to 2D, and as close to the tip of the injectors 2A to 2D as possible. Air can be blown toward the tip end portion of 2A to 2D and the periphery of the injector mounting hole 7, specifically, the tapered surface 7a formed at the end of the cylinder mounting hole 7 when the injectors 2A to 2D are lowered. The injectors 2 </ b> A to 2 </ b> D are provided obliquely upward with respect to the tip end portions and the injector mounting holes 7. As a result, while removing the foreign matters at the tip portions of the injectors 2A to 2D, an efficient flow path is formed to remove foreign matters around the injector mounting holes 7 when the injectors 2A to 2D are lowered, so that the foreign matters do not fly. It prevents it from staying.

  Further, since the gas spray nozzle 71 is provided on the side surface of the injector mounting table 26, the injector spraying table 26 is moved downward, and during the insertion operation of the direct injection injector unit 1, the gas spraying operation is performed at the same time. Air can be blown to the tip portions of 2A to 2D and the periphery of the injector mounting hole 7 when the injector is lowered without time loss.

  Further, the gas spray nozzles 71 are respectively provided on the injector mounting tables 26, and all the gas spray nozzles 71 simultaneously spray air toward the tapered surfaces 7 a of all the injector mounting holes 7. Thereby, an air curtain effect is produced between the adjacent injector mounting holes 7, and entry of foreign matters blown from the other can be prevented.

  Next, an assembling procedure of the direct injection injector unit by the assembling apparatus of the present embodiment having the above-described configuration will be described.

  First, the cylinder head 8 is mounted on the head mounting table 11 with the injector mounting hole 7 oriented in the Z direction. The pitch changing unit 14 changes the pitch in the X direction between the holding portions 12 </ b> A to 12 </ b> D so as to match the pitch of the injector mounting holes 7 provided in the cylinder head 8.

  And as shown in FIG. 3, each cup part 5 of the fuel pipe 4 of the direct injection injector unit 1 is accommodated in each U-shaped groove 28 of each injector mounting part 27 in holding | maintenance part 12A-12D, and a flange part 6 is placed on the support surface 27a of the injector placement portion 27 so as to be horizontally movable, and the injectors 2A to 2D are positioned in the Z direction. At the same time, the inclination error of the reference injector 2C is corrected by bringing the flange portions 6 of the second and fourth injectors 2B and 2D into contact with the positioning members 29 of the holding portions 12B and 12D.

  Next, an air cylinder (not shown) to which the connecting rod 32 is connected is operated to lower each pipe pressing member 31, and the fuel pipe 4 is accommodated in the inverted U-shaped groove 33 of the pipe pressing member 31. Hold. Further, the air cylinder 40 disposed in the holding portion 12C is operated to extend the piston rod 42, and as shown by the dotted line in FIG. 1, the L-shaped member 35 is rotated approximately 90 degrees in the clockwise direction, thereby holding the holding portion 12C. A pair of flange pressing pins 37 are brought into contact with the front side surface of the flange portion 6 of the reference injector 2 </ b> C held on the front side.

  Further, the chucking air cylinders 46 of the holding portions 12A to 12D are operated, and the two side surfaces of the injectors 2A to 2D are gripped from the X direction by the pair of gripping arms 47. Since the gripping surfaces of the pair of gripping arms 47 are formed in a substantially V shape facing each other in plan view, the outer peripheral surfaces of the cylindrical injectors 2A to 2D are held.

  At this time, the gripping arm 47 arranged on the holding portion 12C grips the reference injector 2C while being positioned in the X direction and the Y direction within the horizontal plane because the width W1 is wide. That is, the reference injector 2 </ b> C is accurately aligned with the injector mounting hole 7 of the cylinder head 8. On the other hand, since the holding arms 47 arranged in the holding portions 12A, 12B, and 12D have a narrow width W2, they hold the injectors 2A, 2B, and 2D while guiding the tip portions in a state where the tip portions are movable.

  Then, the Z driving device (not shown) is operated to move the Z movable base 23 (insertion unit 13) downward, and while pressing the fuel pipe 4 with the tip of the inverted U-shaped groove 33 and the support member 33a, The injectors 2A to 2D are inserted into the injector mounting holes 7 and assembled to the cylinder head 8.

  In addition, when the injectors 2A to 2D are inserted into the injector mounting holes 7, each gas blowing nozzle 71 of the cleaning device 70 is blown toward the tip of the injectors 2A to 2D. When the injector mounting table 26 is lowered, the gas blowing nozzle 71 is also lowered, and air is blown toward the tapered surface 7 a of the injector mounting hole 7.

  Specifically, as shown in FIG. 4A, a cup including the tapered surface 7 a of the injector mounting hole 7 in which ambient air is pulled by the airflow A from the gas blowing nozzle 71 to generate the airflow B. A rebounding airflow C is formed in the shaped portion. As a result, the foreign matter α blocking the injector mounting hole 7, the foreign matter β hanging down in the injector mounting hole 7, and the foreign matter γ floating around the injector mounting hole 7 are blown away as shown in FIG.

  Moreover, since all the gas blowing nozzles 71 perform gas blowing simultaneously toward the tapered surfaces 7a of all the injector mounting holes 7, an air curtain effect is generated between the adjacent injector mounting holes 7, and the other It is possible to prevent the foreign matter that has been skipped from entering. Thus, the injectors 2A to 2D can be inserted into the injector mounting hole 7 with high accuracy without biting foreign matter.

  As described above, according to the method for assembling the injectors 2A to 2D to the injector mounting hole 7 according to the present embodiment, by blowing air toward the tapered surface 7a of the injector mounting hole 7, the injector mounting hole 7 2A to the injector mounting hole 7 while performing the step of preventing the foreign matter from adhering to the injector mounting hole 7 by the air flow wound up by the taper surface 7a and the spraying process while removing the foreign matter adhering to the injector. Assembling 2D. Moreover, according to the assembly apparatus of injector 2A-2D to the injector attachment hole 7 which concerns on this embodiment, while removing the foreign material adhering to the injector attachment hole 7, a foreign material is produced by the airflow wound up by the taper surface 7a. So as to prevent the fuel from adhering to the injector mounting hole 7, a cleaning device 70 having a gas spray nozzle 71 for blowing gas toward the tapered surface 7 a of the injector mounting hole 7, and the injector 2 A to the injector mounting hole 7. And an insertion unit for inserting 2D. As a result, foreign matter in the vicinity of the injector mounting hole 7 and inside the injector mounting hole 7 can be removed, and the foreign matter can be prevented from adhering to the injector mounting hole 7 due to the air flow wound up by the tapered surface 7a. The injectors 2A to 2D can be assembled to the injector mounting hole 7 with high accuracy without any problems.

  The injectors 2 </ b> A to 2 </ b> D are held by an injector holding unit 12 that moves toward the injector mounting hole 7, and a gas blowing nozzle 71 that blows gas is provided on the injector mounting table 26 of the injector holding unit 12. Yes. As a result, when the injector is inserted into the injector mounting hole 7, the gas blowing nozzle 71 can also be moved simultaneously, and the injectors 2 </ b> A to 2 </ b> D are inserted while efficiently blowing the gas without separately adjusting the nozzle 71. be able to.

  Further, since the gas blowing nozzle 71 is mounted obliquely upward with respect to the tip portions of the injectors 2A to 2D and the injector mounting hole 7, the tip portions of the injectors 2A to 2D are inserted when the injector is inserted into the injector mounting hole 7. The air can be blown toward the injector mounting hole 7 and the flow of air can be controlled from one direction to prevent foreign matter from adhering to the injector mounting hole 7.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
In the direct injection injector unit of the present embodiment, four injectors are provided, but the number of injectors is not limited to this, and is provided corresponding to the number of cylinders of the engine.

Further, the configuration of the injectors 2A to 2D is not limited to that of the present embodiment, and may be a configuration that does not include the tolerance ring 61, for example.
Furthermore, although this embodiment demonstrated the assembly method of injector 2A-2D to the injector attachment hole 7, this invention is not limited to this, The penetration | invasion which prevents the biting of a foreign material and has a taper surface Any device can be used as long as it assembles parts into the holes.

DESCRIPTION OF SYMBOLS 1 Direct-injection injector unit 2A-2D Injector 2C Reference | standard injector 4 Fuel pipe 5 Cup part 6 Flange part 7 Injector mounting hole 8 Cylinder head 10 Assembling apparatus 11 of direct-injection injector unit Head mounting base 12 Injector holding unit 12A, 12B, 12C , 12D Holding part 13 Insertion unit 27 Injector mounting part 27a Support surface 28 U-shaped groove 29 Positioning member 53 Chuck mechanism 71 Gas spray nozzle

Claims (8)

A method of assembling a part to a through hole in which a part is assembled to a through hole having a tapered surface at an end,
By blowing gas toward the tapered surface of the through-hole, the foreign matter attached to the through-hole is removed, and the foreign matter is prevented from adhering to the through-hole due to the air flow wound up by the tapered surface. Process,
Assembling the components in the through hole while performing the spraying step;
A method for assembling a part to a through hole. The component is an injector;
2. The method of assembling a part to a through hole according to claim 1, wherein the through hole is an injector mounting hole formed in a cylinder head. The injector is held by an injector holding unit that moves toward the injector mounting hole,
The method for assembling parts to the through hole according to claim 2, wherein the gas blowing nozzle for blowing the gas is provided in the injector holding unit.   4. The method of assembling a part into a through hole according to claim 3, wherein the gas spray nozzle is attached obliquely upward with respect to a tip end portion of the injector and the injector attachment hole. A device for assembling a component into a through hole for assembling a component into a through hole having a tapered surface at the end,
While removing the foreign matter adhering to the through hole, gas is blown toward the tapered surface of the through hole so as to prevent the foreign matter from adhering to the through hole by the air flow wound up by the tapered surface. A cleaning device having a gas blowing nozzle for
An insertion unit for inserting the component into the through hole;
A device for assembling parts into a through-hole. The component is an injector;
The said through-hole is an injector attachment hole formed in a cylinder head, The assembly | attachment apparatus of the components to the through-hole of Claim 5 characterized by the above-mentioned. An injector holding unit that holds the injector and moves toward the injector mounting hole by the insertion unit;
The apparatus for assembling parts to the through hole according to claim 6, wherein the gas blowing nozzle is provided in the injector holding unit.   8. The apparatus for assembling parts into a through hole according to claim 7, wherein the gas spray nozzle is mounted obliquely upward with respect to a tip end portion of the injector and the injector mounting hole.

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