JPH0318945B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a sealant application device for a fastener driving device. The present invention is particularly suitable for applying sealant during riveting to aircraft wing skins.

[Technical background of the invention and its problems]

When driving rivets on the main wing skin of an aircraft, sealant is supplied and applied to the inner surface of the through-hole of the connected member through which the rivet or lock pin is inserted, and near the opening of the through-hole, and after driving the rivet or lock pin, To ensure that the gap between the connected member and the connected member is completely sealed.

Conventionally, in order to apply a sealant, a sealant application nozzle is inserted from each side into openings at both ends of a through hole of a connected member to supply sealant to the inner surface of the through hole and its vicinity. The sealant can be applied well to the surface of the countersunk part provided at one end of the through hole, but the application of sealant by inserting the sealant application nozzle from the other end of the through hole is especially effective on the inside of the through hole. There is a problem in that it cannot always be done sufficiently on walls.

Since the inside of the main wing of an aircraft is used as a fuel tank, if there is a defect in the seal, fuel may leak from that part, causing a serious accident. Especially for aircraft that require high performance and high safety, the above-mentioned problems must be completely eliminated.

[Purpose of the invention]

The present invention has been made in view of these problems, and its purpose is to provide a sealant that can be applied well to the inner wall surface of the through hole when the sealant is applied from the opening on the opposite side of the countersunk portion of the through hole. An object of the present invention is to obtain a sealant application device for a rivet device.

[Summary of the invention]

To achieve the above object, the sealant applicator of the present invention includes a device for forming a through hole having a countersunk portion at one end in connected members to be connected by driving rivets, and a device that is inserted into the countersunk portion of the through hole. a first sealant application nozzle that supplies sealant to the surface of the countersunk portion; a protrusion to be inserted into the opening on the opposite side of the countersunk portion of the through hole; and a second sealant application nozzle having a sealant supply hole in a distal end surface surrounding the protrusion, and the protrusion has a cross-sectional area that decreases as it reaches its base.

[Embodiments of the invention]

In FIG. 1, reference numeral 2 indicates a main wing of an aircraft as an example of a member to be connected to which rivets are driven. The main wing 2 is fixed to the workpiece support frame 3 by a fixing means (not shown). The support frame 3 has a rectangular shape, and both longitudinal ends thereof are supported by a carriage 6 by a support shaft 4. The support frame 3 can be rotated at any angle around the support shaft 4 and fixed. The carriage 6 is supported so as to be displaceable along a guide 7 in the Y-Y direction.

A guide 7 supporting the carriage 6 is supported by a column 8 so as to be movable in the Z-Z direction, and the column 8 is supported by a truck 11 that can run along a rail 10 in the XX direction. The carriage 6, guide 7, truck 11, etc. are displaced by appropriate motors.

A riveter frame 13 having a shape that sandwiches the workpiece support frame 3 from above and below is installed on one side of the rail 10. The upper arm 13a of this riveter frame 13
A first cylindrical pressing member, a lock pin supply device, etc., which will be described later, are provided at the tip of the arm 13.
A second cylindrical pressing member, a lock collar supply device, a lock collar drive shaft, etc., which will be described later, are provided at the tip of b. The above-described device provided on the riveter frame arm 13a and the riveter frame arm 13b
The above-mentioned device installed in the main wing 2 acts on the main wing 2 from above and below, respectively, thereby performing the fastening operation as described below.

The riveting is done at countless positions on the entire surface of the main wing 2, and the action is carried out by the riveter drive hydraulic unit 1.
4. Controlled by NC control device 15 and sequence controller 16. Note that 17 indicates a voltage box.

In FIG. 2, 20 is a first cylindrical pressing member provided on the upper arm 13a of the riveter frame;
21 is a second cylindrical pressing member provided on the lower arm 13b, and both of these pressing members 20, 21 are supported by the riveter frame 13 so as to be movable so as to approach the connected members 2a, 2b. has been done.
The second pressing member 21 has a cylindrical shape and has a hollow lock collar drive shaft 22 therein. This drive shaft 22 is connected to a drive source (not shown) and is rotationally driven, and the pressing member 21
It can be slid freely in the axial direction. Further, a protrusion 23 is formed on the inner surface of the lock collar drive shaft 22 in its longitudinal direction, and following the upper end of the protrusion 23, the inner surface 24 of the lock collar drive shaft has a non-circular cross section.
For example, it is formed in an oval cross section.

From the state shown in FIG. 2, the first and second cylindrical pressing members 20, 21 move relatively forward toward the surfaces of the connected members 2a, 2b, and the end surfaces of both cylindrical members 20, 21 are moved forward as shown in FIG. As shown in FIG.
It is held under pressure by 0 and 21.

Next, while maintaining the state shown in Figure 3, drill the drilling drill 2.
6 is lowered to open the through hole 2 as shown in FIG.
7 is formed. The through hole 27 has a countersunk portion 28 on the upper end side, and for this purpose, the drilling drill 26 is provided with a countersunk portion forming blade 29.

A sealant is applied to the inner surface of the through hole 27 and the vicinity thereof while the connected members 2a and 2b having the through hole 27 formed in this manner are pressed by both the pressing members 20 and 21. For this purpose, the fifth
As shown in the figure, sealant application nozzles 31, 32
are advanced into the upper and lower openings of the through hole 27.

The first sealant application nozzle 31 is provided above the connected members 2a, 2b, and is fixed to the tip of the sealant supply pipe 34 by screwing. A spring 35 is inserted into the sealant application nozzle 31.
The sealant is supplied through a valve made up of a ball 36 that is compressed by the sealant, and is blown out from a sealant supply hole 37 formed at an angle to the nozzle axis at the tip of the nozzle 31. The tip surface of the nozzle 31 has a countersunk portion 2
It has a conical surface that fits the surface of 8. For example, four sealant supply holes 37 are provided at equal intervals in the circumferential direction. The sealant supplied from the sealant supply hole 37 is applied to the surface of the countersunk portion 28 of the through hole 27, and also flows to the inner surface of the through hole 27 below it.

The second sealant application nozzle 32, which forms the main part of the present invention, is fixed to the tip of the sealant supply pipe 39 by screwing, and the sealant is supplied into the application nozzle 32 through a valve consisting of a ball 41 pressed by a spring 40. Supplied upwards. Application nozzle 32
A protrusion 43 is formed at the center of the tip, and the cross-sectional area (diameter) of this protrusion 43 becomes smaller as it approaches the base, and the tip of the protrusion 43 is approximately the same as the inner diameter of the through hole 27. have equal outer diameters. Therefore, when the protrusion 43 is inserted into the through hole 27, a gap 44 is formed between the outer peripheral surface of the base of the protrusion and the inner wall of the through hole. Sealant supply holes 45 are formed at equal intervals on the outer periphery of the base of the protrusion 43 . An annular protrusion 46 surrounding a protrusion 43 is provided on the outer periphery of the tip of the nozzle 32, and the sealant supply hole 4
An annular space 47 is formed at the exit portion of 5.

Second application nozzle 3 for application of sealant
2 is advanced to the position shown in FIG. The inner wall surface of the hole 27 is also well coated. This is possible because the gap 44 widens downward due to the unique shape of the protrusion 43.

After the sealant is well applied to the through hole 17 and its vicinity as described above, both application nozzles 31,
32 is retracted, and then, as shown in FIG. 6, the lock pin 50 is inserted into the through hole 27 from above. This locking pin 50 is fed through the interior of the first pressing member 20. The lock pin 50 has a head 51 having a shape corresponding to the countersunk portion 28, and further has a thread 52 at its tip and a non-circular engagement portion 53 at its tip surface. The non-circular engagement portion 53 is a non-circular hole in this embodiment.

Next, as shown in FIG. 7, an anvil 56 guided within the sleeve 55 is lowered to press the top surface of the head of the lock pin 50 from above.

Then, as shown in FIG.
is pushed up from below through the inside of the lock collar drive shaft 22 and fitted onto the tip of the lock pin 50. The lock collar 60 has a female thread 61 and a thin weakened portion 62 in the middle. Although not shown in the figure, the lock collar 60 has a groove on its outer surface that slidably engages with the protrusion 23 of the lock collar drive shaft 22, and is guided by the protrusion 23 while being guided by the lock collar feeder 63. being pushed upwards.
Lock collar 6 pushed up to the position shown in Figure 8
0 is the non-circular cross-sectional inner surface 2 of the lock collar drive shaft 22
4. For this purpose, the cross-sectional shape of the lock collar 60 is made to be in close contact with the non-circular cross-sectional inner surface 24.

Meanwhile, the lock pin fixing mandrel 65 is raised together with the lock collar 60. Non-circular engaging portion 53 of lock pin 50 of non-circular engaging portion 66 at its tip
the lock pin 50 from rotating.

In the state shown in Fig. 8, the lock collar drive shaft 22
When the lock collar 60 is rotated in the direction indicated by A in the same figure, the lock collar 60 is rotated in the screwing direction, and the lock collar 60 advances until its distal end surface contacts the surface of the connected member 2b, as shown in FIG.

When the lock collar 60 comes into contact with the surface of the connected member 2b, the screwing torque suddenly increases, so that the lock collar 60 is destroyed at the weakened portion 62. Therefore, when the lock collar drive shaft 22 is retracted, the main body of the lock collar 60 remains threaded into the lock nut 50, as shown in FIG. In this state, the previously applied sealant is interposed between the connected members 2a, 2b, the lock pin 50, and the lock collar 60, and performs a sealing action.

After the tightening rivet driving is completed in the above manner, both pressing members 20 and 21 are separated from the member to be tightened, as shown in FIG. Move the attachment member.

〔Effect of the invention〕

In the present invention, the cross-sectional area of the protrusion at the center of the tip of the second sealant application nozzle inserted into the opening on the opposite side of the countersunk part of the through hole of the connected member decreases as it reaches the base. By the way,
When the second sealant application nozzle is applied to the through hole, a gap is formed between the outer periphery of the protrusion inserted into the through hole and the wall surface of the through hole, and the gap gradually widens toward the outside. When the sealant is supplied from the sealant supply hole around the through hole, the sealant is guided into the through hole due to the existence of the gap, and the sealant is sufficiently applied to the inner surface of the through hole.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of a fastener driving device equipped with a sealant application device according to the present invention, FIG. 2 is a longitudinal cross-sectional view of the main part of FIG. 1 in a state before starting fastener driving, and FIGS. 3 and 4 2 is a longitudinal sectional view showing the fastener driving process that has proceeded sequentially from the state shown in FIG. 2, FIG. 5 is a longitudinal sectional view showing the application state of the sealant application device which is a feature of the present invention, and FIGS. 6 to 11 are: FIG. 6 is a vertical cross-sectional view showing different states of the fastener driving process after applying the sealant. 2, 2a, 2b... Connected member, 13... Riveter frame, 15... NC control device, 16...
Sequence controller, 20... first cylindrical pressing member, 21... second cylindrical pressing member, 22...
Lock collar drive shaft, 23...Protrusion, 24...Non-circular section inner surface, 26...Drilling drill, 27...Through hole, 28...Countersunk portion, 31...First sealant application nozzle, 32... Second sealant application nozzle, 37...Sealant supply hole, 43...Protrusion, 44...Gap, 45...Sealant supply hole,
46... annular projection, 47... annular space, 50...
Lock pin, 51... Head, 53... Non-circular engaging portion, 55... Sleeve, 56... Anvil, 60
...Lock collar, 61...Female thread, 62...Weakened part, 63...Lock collar feeder, 65...
Lock pin fixing mandrel, 66...non-circular engagement part.

Claims (1)

[Claims] 1. Connected members 2a, 2b to be connected by driving rivets
a device 20, 21, 26 for forming a through hole 27 having a countersunk portion 28 at one end; and a first sealant application device inserted into the countersink portion 28 of the through hole to supply sealant to the surface of the countersunk portion. A second tube having a nozzle 31 and a protrusion 43 inserted into the opening on the side opposite to the countersunk portion 28 of the through hole at the center of the tip, and a sealant supply hole 45 on the tip surface surrounding the base of the protrusion. a sealant application nozzle 32, and the protrusion 4
Reference numeral 3 refers to a sealant application device for a fastener driving device, characterized in that the cross-sectional area decreases as it approaches the base. 2 The tip surface of the second sealant application nozzle 32 where the sealant supply hole 45 is located has an annular protrusion 46 around it.
A sealant application device for a fastener driving device according to claim 1, comprising the following.