JPH10174785A - Ball end screwing device for model - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ball end screwing device for a model easily screwing a ball end for a model to an adjustable rod for a model without a special skill. SOLUTION: This ball end screwing device for a model is composed of a rod fixing base 7 for fixing the adjustable rod for a model, a ball end fixing base 11 with a link turning part 35 for rotating the ball end for a model and a pedestal 13 fixed so as to enable these to move in a sliding style in a longitudinal direction. Then the bases 7 and 11 are fixed to the optional position of the pedestal 13 by a fixing screw part 21 provided for each of them. In addition, as a scale for measuring a screwing quantity is provided at the pedestal 13, screwing and measuring are executed at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a model ball for easily screwing an adjustable rod and a ball end, which are widely used as a linkage between a rudder of a radio control model and a servomotor, without special skill. It relates to an end screwing device.

[0002]

2. Description of the Related Art As shown in FIG. 3 (a), for example, a radio control model remotely controlled by a radio device has one or more steering units for controlling the attitude and direction or the output of an engine and a motor. 109 are provided. The rudder section 109 is generally provided with an adjustable rod 101 and a ball end 103 as shown in FIG.
When the servo horn 107 is rotated by the servo motor 105, the
9 is steered.

The ball end 103 has a female screw 111
However, an external thread 113 is formed at one or both ends of the adjustable rod 101, and the ball end 10
The male screw portion 113 of the adjustable rod 101 is screwed into the third female screw portion 111. A circular perforated portion 115 is formed at one end of the ball end 103, and a spherical projection called a linkage ball 117 attached to the servo horn 107 or the like is rotatably fitted into the perforated portion 115. Is done. The inner side surface of the circular perforated portion 115 is processed into a spherical concave shape, and the ball end 103 is connected to the linkage ball 11.
7 is locked at the center position.

[0004]

By the way, the ball end and the adjustable rod are compared so that they do not loosen due to the vibrations of the engine or motor mounted on the model, the acceleration or deceleration, or the force generated during the direction change. It is designed to be screwed with a large torque. Therefore, tools such as pliers are required for screwing, but if you try to screw with tools such as pliers, they will not be able to hold down the ball end or the adjustable rod and will damage these surfaces, Sometimes your hand slips and crushes the threads. If the ball end and the adjustable rod must be adjusted to the length described in a design drawing or the like, it is necessary to repeatedly perform operations such as screwing and measuring the length.
When it is necessary to screw the ball ends to both ends of the adjustable rod, adjust the ball ends so that the screw amount is not biased to one side and the smaller screw amount does not easily come off. Must be screwed evenly to both ends. In screwing the ball end into the adjustable rod in this manner, a great deal of labor and time are required, especially if the user is not used to working.

The present invention has been made in view of the above circumstances, and has as its object that even a person who is unfamiliar with the work can easily adjust the length of both the ball ends and the adjustable rods without damaging them. In the case where it is necessary to screw the ball ends to both ends of the adjustable rod, both ball ends can be easily screwed in an equal amount, and the structure is simple and mass production is possible. Another object of the present invention is to provide a model ball end screwing device which can be produced at low cost.

[0006]

According to one aspect of the present invention, there is provided a model ball end screwing device for fixing an adjustable rod for a model. A ball-end fixing base having a link turning part for rotating the model ball end, and a pedestal on which the rod fixing base and the ball-end fixing base are attached so as to be slidable in the longitudinal direction. Wherein the rod fixing base and the ball end fixing base can be fixed at arbitrary positions on the pedestal by set screw portions provided respectively. According to this device, since the ball end and the adjustable rod are firmly fixed on the pedestal, there is no need to press down with a tool such as pliers, and even those who are not used to work can rotate the link turning part. By simply doing so, the two can be easily screwed together.

In the invention according to a second aspect of the present invention, the model ball end mounting portion on the link turning portion is a ball portion formed in a substantially spherical shape, and the center of the ball portion is It is characterized in that it is on the rotation axis of the link turning part. By doing so, the rotation axis of the ball end and the rotation axis of the adjustable rod can be easily and reliably matched, and there is no fear of crushing the screw thread at the time of screwing.

The invention according to claim 3 of the present invention is characterized in that the pedestal is provided with a scale for measuring the amount of screwing of the ball end to the adjustable rod. By doing so, it is not necessary to apply a ruler for each measurement, and even a person who is not used to working can easily and accurately screw the ball end.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1A is a perspective view of a model ball end screwing device 5 according to the present invention, on which an adjustable rod 1 and a ball end 3 are mounted. This apparatus comprises a rod fixing base 7 for fixing the adjustable rod 1, a ball end fixing base 11 for rotating the ball end 3, and a pedestal 13 on which the rod fixing base 7 and the ball end fixing base 11 are mounted. It is configured. A pedestal insertion hole 15 having the same shape as the cross section of the pedestal 13 is formed through the lower part of the rod fixing base 7 and the ball end fixing base 11. The pedestal 13 is inserted into the pedestal insertion hole 15, and the rod fixing base 7 and The ball end fixing base 11 is slidably mounted in the longitudinal direction of the pedestal 13. Further, pedestals 13 are provided on lower side surfaces 17 of the rod fixing base 7 and the ball end fixing base 11, respectively.
A female screw part (not shown) for fixing is formed to penetrate toward the side face of the head, and a flat screw 21 having a knurled head side face so that it can be rotated by hand is formed on this female screw part for fixing. Each is screwed. By rotating the flat screw 21, the rod fixing base 7 and the ball end fixing base 11 can be fixed at any positions along the longitudinal direction of the pedestal 13.

FIG. 1B is an enlarged perspective view of the rod fixing base 7.
Shown in On the upper surface of the rod fixing base 7, a metal holding plate 23a for fixing the adjustable rod 1 is fixed by welding or a set screw in parallel with the direction in which the adjustable rod 1 is mounted.
In the wide surface along the longitudinal direction of the pedestal 13, a female screw part 25 for fixing a rod is formed to penetrate the holding plate 23a. The rod fixing female screw portion 25 receives a rod fixing male screw 29 that has passed through a hole 27 formed in a wide surface of the holding plate 23b. The adjustable rod 1 is fixed to the rod fixing base by screwing a male rod fixing screw 29 between the holding plate 23a and the holding plate 23b. The head side surface of the rod fixing male screw 29 is knurled so that it can be rotated by hand. Further, groove portions 3 having a semicircular cross section in accordance with the cross sectional shape of the adjustable rod 1 are formed on the inner side surfaces of the holding plates 23a and 23b.
1 is formed, and the surface of the groove 31 is coated with a resin agent for preventing slippage.

On the other hand, as shown in FIG. 1C, a cylindrical perforated portion 33 is formed above the ball end fixing base 11 in parallel with the longitudinal direction of the pedestal 13.
3, a link turning unit 35 is inserted. The link turning part 35 is constituted by a knob part 37 and a cylindrical part 39, and a spherical linkage ball part 41 is formed at the tip of the cylindrical part 39. The ball end 3 is fitted into the linkage ball portion 41. However, since the inner side surface of the perforated portion of the ball end 3 is formed in a spherical concave shape as described above, the ball end 3 is positioned substantially at the center of the linkage ball portion 41. Locked by. Since the center position of the linkage ball portion 41 is aligned with the rotation axis of the link turning portion 35, the ball end 3 is not eccentric during rotation. The wand portion of the knob 37 serves as a stopper 43 having a larger diameter than the perforated portion 33.

Next, a method of screwing the ball end 3 to the adjustable rod 1 using the present apparatus will be described step by step. First, the adjustable rod 1 and the ball end 3 are lightly screwed in advance before being mounted on the present apparatus.
1 and the adjustable rod 1 is held by the holding plate 23 of the rod fixing base 7.
It is sandwiched between (a) and (b), and the rod fixing male screw 29 is further rotated and fixed. Here, if the flat screw 21 attached to the lower side surface of the rod fixing base 7 is loosened, and the knob 37 of the ball end fixing base 11 is rotated, the rod fixing base 7 moves along the pedestal 13 to the ball end fixing base 7. , And the ball end 3 is gradually screwed into the adjustable rod 1. At this time, since the rotation axis of the ball end 3 and the rotation axis of the adjustable rod 1 coincide with each other, there is no need to worry about crushing the screw thread, and the adjustable rod 1 is fixed to the rod fixing base 7 with sufficient strength. The adjustable rod 1 does not rotate together. Further, contrary to the above-described method, the rod fixing base 7 may be fixed to the base 13 so that the ball end fixing base 11 slides toward the rod fixing base 7.

If the scale 45 is laid along the longitudinal direction of the pedestal 13, the screwing amount can be measured while screwing the ball end 3, which is convenient. The numerical value of the scale 45 may be calculated based on the end of the pedestal 13 as a base point, or may be calculated such that the numerical value increases toward both ends with the center of the pedestal 13 as a base point. Further, if an inspection hole for reading the scale 45 is formed at an appropriate position on the rod fixing base 7 or the ball end fixing base 11, the distance from the center position of the rod fixing base 7 or the ball end fixing base 11 can be directly determined. It can be read from the scale 45. According to the third aspect of the present invention, the scale is not fixedly provided on the pedestal 13, but the scale is made independent of the pedestal 13 as a scale portion, and is attached to and detached from the pedestal 13 using a magnet or a hook-and-loop fastener. This includes a case in which the scale portion can be slid along the longitudinal direction of the pedestal 13. In this case, the starting point of the scale can be freely adjusted without moving the rod fixing stand 7 or the ball end fixing stand 11.

Further, as a method of slidingly fixing the rod fixing base 7 and the ball end fixing base 11 to the pedestal 13, as shown in FIG.
A rail portion 47 is formed along the longitudinal direction of the rod, and the rod fixing base 7 and the ball end fixing base 11 are slid along the rails. There is a part which is not hidden by the rod fixing base 7 and the ball end fixing base 11
It is not necessary to provide a viewing hole, and it is also possible to directly provide a scale at this portion or to mount the above-mentioned detachable scale portion. In this case, the lower portions of the rod fixing base 7 and the ball end fixing base 11 may have a sectional shape as shown in FIG.

If the knob of the link turning section 35 attached to the ball end fixing base 11 is a hand-turn handle as shown in FIG. 2C, the ball end can be more easily rotated. .

Further, the above-mentioned linkage ball portion 41
Alternatively, a socket having a shape as shown in FIG. By doing so, the link rotating unit 35
Since the force applied to the fitting portion between the ball end 3 and the linkage ball portion 41 at the time of rotation is distributed toward the socket, even if it is necessary to rotate the link turning portion 35 with a strong force, There is no fear that the end 3 comes off the linkage ball 41.

Further, the linkage ball portion 41 is
As shown in (e), if the upper portion is formed in a conical shape and a cut is made from the conical portion to the spherical portion, the cut portion is narrowed, and the ball end 3 is easily fitted to the linkage ball portion 41. I have.

As a method of fixing the adjustable rod 1 to the rod fixing table 7, in addition to the above-mentioned method, for example, a method in which a holding plate as shown in FIG. By doing so, the adjustable rod 1 can be fixed more easily because the adjustable rod 1 can be placed on the lower holding plate 51 (a) before being covered with the upper holding plate 51 (b).

Further, the ball end fixing base 11 is attached to both sides of the pedestal 13 with the rod fixing base 7 interposed therebetween, and the center of the adjustable rod 1 is fixed to the rod fixing base. The ball ends 3 may be screwed from both sides of the pedestal 13 so as to be slidable. In this way, by reading the scale at both ends, the ball ends 3 at both ends can be easily and uniformly screwed.

[0020]

As described above, when the ball end screwing device for a model according to the first aspect is used, since the ball end and the adjustable rod are firmly fixed on the pedestal, it is necessary to press down with a tool such as pliers. Therefore, the two can be easily screwed together only by rotating the link turning section. In addition, since the structure is simple, mass production is possible and production can be performed at low cost.

Further, as described in claim 2, the model ball end mounting portion on the link turning portion is a ball portion formed in a substantially spherical shape, and the center of the ball portion is on the rotation axis of the link turning portion. By doing so, the rotation axis of the ball end and the rotation axis of the adjustable rod can be easily and surely made to coincide with each other, and there is no fear of crushing the screw thread at the time of screwing.

In addition, since the scale for measuring the amount of screwing of the ball end to the adjustable rod is provided on the pedestal, even if a person who is not accustomed to the work, is screwed into the pedestal. While the ball end can be easily screwed into the adjustable rod with the correct length,
Furthermore, by providing ball end fixing bases on both sides,
The ball end can be easily and uniformly screwed to both ends of the adjustable rod.

[Brief description of the drawings]

FIG. 1A is an overall perspective view of a model ball end screwing device according to the present invention. (B) is a partial enlarged perspective view of the rod fixing stand. (C) is a partial enlarged perspective view of the ball end fixing base.

FIG. 2A is an overall perspective view of a pedestal provided with a rail portion. (B) is a lower sectional view of a rod fixing stand and a ball end fixing stand. (C) is a perspective view of a handwheel used in place of the knob of the link wheel.
(D) is a partial enlarged perspective view of the socket which covers the linkage ball part of a link rotation. (E) is a partial enlarged perspective view of the improved linkage ball portion. (F) is a partially enlarged perspective view of the improved rod fixing base.

FIG. 3 (a) is a plan view of a radio control airplane model using an adjustable rod and a ball end. (B) is an enlarged view of a part A of (a). (C)
FIG. 3 is an exploded perspective view showing a screwed state of an adjustable rod and a ball end.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adjustable rod 3 Ball end 7 Rod fixing stand 11 Ball end fixing stand 13 Pedestal 21 Flat screw 23 Clamping plate 29 Male screw for rod fixing 35 Link turning part 41 Linkage ball part 45 Scale

Claims (3)

[Claims] 1. A rod fixing base for fixing a model adjustable rod, a ball end fixing base having a link turning part for rotating a model ball end, and the rod fixing base and the ball end fixing base are: A pedestal attached so as to be slidably movable in the longitudinal direction, wherein the rod fixing base and the ball end fixing base can be fixed at any positions of the pedestal by set screw portions provided respectively. Ball end screwing device for a model. 2. The ball end screw for a model according to claim 1, wherein the ball end mounting portion for the model provided on the link turning portion is located on a rotation axis of the link turning portion. Joint equipment. 3. The model ball-end screwing device according to claim 1, wherein a scale for measuring a screwing amount of the ball end to the adjustable rod is provided on the pedestal.