JPH0236556Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a model airplane whose wings open after launch.

In order to make a model airplane fly at high altitude, it is possible to shorten the time it takes to take flight by ejecting it into the sky in some way, but the large main wings actually get in the way and make it difficult to accomplish. Therefore, the applicant proposed that at the time of ejection, the main wings were folded along the fuselage, and after ejection, they were raised in a parapetal line, and then folded when the aircraft was in a horizontal flight position and further into a descending flight position. Various model airplanes in which the left and right main wings can be opened have already been proposed, but the purpose is to provide a model airplane that has a simpler configuration, ensures reliable operation, and can be supplied at a low price.

The structure will be explained in detail based on one embodiment shown in the drawings. As shown in FIG. along the fuselage 1 of a model airplane, which has a pair of wings 4, 4, each of which has a tendency to rotate about a folding center axis 3, 3 provided in the plane, to a position in flight, respectively, by a spring force; Cylinder head 5 in the direction of flight of the airplane (see Figure 2)
A cylinder 6 is provided with a piston rod 7 extending outside the cylinder 6 through the cylinder 6, and the piston rod 7 has a bent portion 8 at an end 7'' outside the cylinder 6, and a repellent for launching a model airplane (not shown). a hook portion 9 that engages with the elastic cord;
A contractible body 9', for example rubber, is stretched between the hook part 9 and the cylinder head 5' so that the piston rod 7 tends to return to the opposite cylinder head 5'. An operating rod 10 with one end protruding into the cylinder 6 is always passed through and slidably provided in the cylinder head 5'. A pin 12 is provided which is always tended to retract into the body 1 by a spring 11, and an engaging portion 13 provided in the middle of the pin 12 is provided with a keyhole-shaped groove 10' at the other end of the operating rod 10. When the wings 4, 4 are folded onto the fuselage, the pins 12 can be held in a position protruding from the fuselage 1. ) Holes 14 and 14 (see FIG. 5) are provided on the body 1 so as to overlap each other and have a common central axis Y-Y (see FIG. 4), and the overlapping holes are A pin 12 protruding from the body 1 is inserted through the pins 14, 14.

In addition, the above-mentioned pair of wings 4, 4 try to rotate by the spring force to the position at the time of flight, respectively, about the folding center shafts 3, 3 provided in the frames 2, 2 integral with the fuselage 1. The configuration that gives the tendency is
As shown in FIGS. 1 and 5, one end of the cables 17, 17 is fixed to the clasps 16, 16 on the outer periphery of the disc-shaped bodies 15, 15 at the base of each wing 4, 4, and the other ends of the cables 17, 17 are attached to an elastic body. 1
8 For example, coil spring, body 1 via rubber
For example, a part 1' of the frame 1' is fixed to a catch 19 provided on the horizontal beam 20.

For this reason, a pair of wings 4, 4 are placed on the fuselage 1, and the
As shown in the figure, when folded around the central axes 3, 3, the elastic body 18 accumulates a rotational moment as shown by arrows T, T around the folding central axes 3, 3 in each wing 4, 4. This gives a tendency for the wings 4, 4 to always open to the left and right with the fuselage 1 as the center.

In order to fold and place the wings 4, 4 on the same plane on the fuselage 1, a metal fitting 14' having a hole 14 is provided on the inner edge of each wing 4, 4 as shown in FIG. When the metal fitting 1 is folded, as shown in Fig.
The holes 14, 14 are fixed so that only the holes 4', 14' overlap and have a common central axis Y-Y, so that the upper end of the pin 12 can be fitted into the holes 14, 14.

Furthermore, the pin 12 engages with the circular portion 10'' (see Fig. 4) of the keyhole-shaped groove 10' at one end of the operating rod 10, and when the engaging portion 13 no longer acts as a lock, the pin 12 is lowered by the spring 11. The head of the pin 12 is attached to the wing 4,
It is adapted to come out downward from the hole 14 of the metal fitting 14' of No. 4. In this embodiment, the fuselage 1 is made up of two plates that are made wider and heavier at the tip end in the direction of flight.
o, /o are integrated by inserting horizontal bars 20 here and there, and the stop pin 8 of the front lift is made in the shape of a cotter pin in holes 21, 21 drilled in the two plates /o, /o, so that it can be inserted and removed freely. It has been inserted into.

In Fig. 2, 22 indicates a shock absorber section, 33 indicates a wing stopper, 24 indicates a protrusion, and 25 indicates a rubber body. When the parts 24, 24 hit the stopper 23, each wing 4, 4 assumes the correct flight position.

Since this embodiment has the configuration as described above,
When flying a model airplane, first the elastic body 18
Fold the pair of wings 4, 4 around the central axis 3, 3 against the elastic force of
The pin 12 is placed in the circular part 10'' of 0', and the pin 12 is pushed against the elasticity of the spring 11.
Push up the head of the pin 12 into the overlapping hole 14,
14, move one end of the operating rod 10 toward the cylinder 6, and insert the keyhole-shaped groove 10' at the other end into the engaging portion 1.
3 prevents the pin 12 from lowering, so that the pair of wings 4, 4 are held in the folded state on the fuselage 1.

Next, the elastic cable of the model airplane launcher is hooked onto the hook 9, and when the tail of the model airplane is held and the elastic cable is pulled, the piston 7' moves toward the cylinder head 5 and the piston rod 7 is bent. The portion 8 stops against the stop pin 8'. In this state, when the model airplane is released into the air at an elevation angle of about 45 degrees, the model airplane is launched with the wings 4, 4 folded, and during this time the piston 7' is moved into the cylinder head 5' by the action of the contractile body 9'. Return to the side and press one end of the operating rod 10 protruding into the cylinder 6. Therefore, the operating rod 10
Push the keyhole-shaped groove 10' on the other end toward the pin 12,
The engaging part 13 of the pin 12 enters the circular part 10' of the keyhole-shaped groove 10', and since there is no longer a part that prevents the pin 12 from descending, the pin 12 is moved by the spring 1.
1, the head of the pin 20 is pulled into the fuselage 1 through the holes 14, 14 of each wing 4, 4, and the pair of wings 4, 4 are rotated left and right due to the rotational moment T, T accumulated by the elastic body 18. When the wings 4, 4 are opened and the protrusions 24, 24 of each wing 4, 4 hit the stopper 23, the model airplane enters a state of air gliding in order to place the wings 4, 4 in the correct flight position.

In this case, the best time to open the twin wings 4 and 4 to the left and right is when the model airplane is launched in a parabolic line and the nose is slightly downward from the horizontal position, but at that time the pinton 7' is activated. This is the time when one end of the rod 10 is pressed, and this time is related to the speed of movement of the piston 7' within the cylinder 6, and the timing is related to the moving speed of the piston 7' within the cylinder 6, and the time when the actuating rod 10 and the portion thereof passing through the cylinder head 5' (in this embodiment It is also related to the speed at which the air in the cylinder 6 escapes from the gap with the sheath body 10' through which the operating rod 10 penetrates, so in order for the wings to open just when the nose descends, Adjust the way the grease is applied to this gap, or actively create a hole in the cylinder head 5' so that the size of the hole can be adjusted, or create a small hole in the piston 7. Alternatively, various measures can be considered, such as providing more holes 21 for inserting the stop pins 8' to adjust the length of the return stroke of the piston 7.

In this embodiment, the piston 7' is made of an elastic material, and the diameter of one flange 7 is smaller than that of the other, making it easy to move forward and difficult to move backward.

This idea uses a simple structure consisting of a cylinder, a piston, a piston rod, and an operating rod that protrudes into the cylinder.This device uses a simple structure that consists of a cylinder, a piston, a piston rod, and an operating rod that protrudes into the cylinder.The model airplane is launched into the air with its wings folded, and then the wings are reliably opened and the model plane is launched into a downhill state. This makes it possible to provide model airplanes with wings that open after launch at a lower price.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of a model airplane with open wings after launch according to this invention, Fig. 2 is a partially cutaway front view, Fig. 3 is a side view, and Fig. 4 is a portion of the pin 12. A perspective view and a plan view for explaining the wing opening/closing mechanism are shown in FIG.
is a wing, 5 is one cylinder head, 5' is the other cylinder head, 6 is a cylinder, 7 is a piston rod, 7' is a piston, 8 is a bent part, 8' is a stop pin, 9 is a hook part, 10 is an operating part Rod, 10' is a keyhole groove, 11 is a spring, 12 is a pin, 13
14 indicates a pin engaging portion, and 14 indicates a hole.

Claims (1)

[Scope of utility model registration request] A pair of wings 4, 4 are arranged on the left and right sides of the fuselage 1, each having a tendency to rotate about the folding central axis 3, 3 provided on the fuselage 1 to the position at the time of flight by spring force. A cylinder 6 is provided along the fuselage 1 of a model airplane having a piston rod 7 extending outside the cylinder 6 through a cylinder head 5 on the side in the direction of travel of the airplane. The end portion 7'' is provided with a bent portion 8 that engages with a stop pin 8' provided in the fuselage 1, and a hook portion 9 that engages with an elastic cord of a model airplane launcher. The cylinder head 5' is energized so as to return toward the opposite cylinder head 5', and the cylinder head 5' is provided with an operating rod 10 whose one end always protrudes into the cylinder 6. A pin 12 is provided at the rear of the body 1 so as to be able to pass through the body and be slid freely.
The operating rod 10 is attached to the engaging portion 13 provided in the middle of 2.
Engage the keyhole-shaped groove 10' on the other end and press the pin 12.
can be held at a position protruding from the fuselage 1, and the pair of wings 4, 4 have a common center axis that overlaps each other on the fuselage 1 when the wings 4, 4 are folded onto the fuselage. Hole 14 having Y-Y,
14, respectively, and a pin 12 protruding from the fuselage 1 is inserted into the overlapping holes 14, 14, the wings of which open after launch.