JPH11226878A - Eccentric driver for positioning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily rotate two eccentric drivers simultaneously at an equal angle, so as to make positioning adjustable in a short time. SOLUTION: A housing 10, shaft 2 rotatably supported to the housing 10, and two bevel gears 3, 5 fixed to the shaft 2 with a space opened, are provided. A bevel gear 6A to 6D meshed with any of the bevel gears 2, 5 is provided in an end part, a tip end part 8Aa to 8Da in an opposite side to the end part provided with the bevel gear 6A to 6D is formed in a diameter smaller than a barrel part 8Ab to 8Db, an eccentric driver 8A to 8D with an axial lien of the tip end part 8Aa to 8Da eccentric relating to an axial line of the barrel part 8Ab to 8Db is supported mutually in parallel able to rotate to the housing 10, and the eccentric driver 8A to 8D is rotated simultaneously at an equal angle by rotating the shaft 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a positioning eccentric driver, and more particularly to a positioning eccentric driver used for positioning a reticle of an optical system.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, when a focusing screen 22 is positioned in an optical system 21, as shown in FIG. 3, an axis of a tip portion 23Aa (23Ba) has a circular cross section. An eccentric driver 23A (23B) eccentric with respect to the axis of the portion 23Ab (23Bb) is prepared, and as shown in FIG. 4, a positioning hole 21b formed in a surface 21a of the optical system 21 facing the focusing screen 22. An eccentric driver 23 is inserted into a pair of adjustment slots 22a (Y-direction adjustment slots) or 22b (X-direction adjustment slots) penetrating the focusing screen 22.
A, 23B, and insert the respective tips 23Aa, 23Ba
Is inserted into the positioning hole 21b of the optical system 21, and the eccentric drivers 23A and 23B are rotated by the same angle in the same rotation direction, thereby moving the focusing screen 22 in the direction E of FIG. By setting the state of b), positioning adjustment of the reticle 22 in the X direction or the Y direction was performed. The dotted line in FIG. 5B indicates the position of the reticle 22 before the movement (the position shown in FIG. 5A).

As shown in FIG. 6, when adjusting the rotation direction of the reticle 22 with respect to the optical system 21, the oblong hole 2 is used.
The body portions 23Ab, 23Bb of the eccentric drivers 23A, 23B are inserted into the positioning holes 21b (FIG. 4) through the holes 2b, and the eccentric drivers 23A, 23B are mutually moved around the tips 23Aa, 23Ba as shown by arrows. By rotating the reticle 22 in the opposite direction, the reticle 22 is rotated as shown by a two-dot chain line in the figure to perform positioning adjustment.
Also in this case, in order to rotate the reticle 22 about the same rotation center 25, the eccentric driver 23 is required.
It was necessary to rotate A and 23B in the opposite direction by the same angle.

[0004]

In the conventional positioning adjustment method using the eccentric screwdriver, one operator operates the eccentric screwdriver with both hands, or two eccentric screwdrivers hold one eccentric screwdriver at a time, and the same operation is performed. In this case, the position is adjusted in the X direction, the Y direction, or the rotation direction by simultaneously rotating in the same direction or in the opposite direction.

However, it is very difficult for one operator to operate two eccentric drivers with both hands or to hold two eccentric drivers one by one and simultaneously rotate the same angle at the same time. Was required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a positioning eccentric driver capable of easily rotating two eccentric drivers simultaneously by the same angle and performing positioning adjustment in a short time. I do.

[0007]

According to the first aspect of the present invention,
An eccentric positioning driver, comprising: a housing; a shaft rotatably supported by the housing; and two bevel gears fixed to the shaft at an interval, and the bevel gear meshing with any of the bevel gears. At the end, the tip end opposite to the end provided with the bevel gear is formed with a smaller diameter than the trunk, and the two axes whose tip is eccentric with respect to the axis of the trunk. An eccentric driver is rotatably supported by the housing in parallel with each other, and by rotating the shaft, the two eccentric drivers rotate simultaneously by the same angle.

The invention according to claim 2 is characterized in that the two eccentric drivers rotate in the same direction as each other.

The invention according to claim 3 is characterized in that the two eccentric drivers rotate in directions opposite to each other.

According to a fourth aspect of the present invention, a threaded portion is provided on the shaft, and a threaded portion is formed on one inner ring of the two bevel gears fixed to the shaft so as to be movable with respect to the shaft. A second housing that supports the eccentric driver having the bevel gear and a bevel gear meshing with the bevel gear at an end thereof, wherein the second housing can be moved in the axial direction of the shaft on the housing that supports the shaft; It is characterized in that an elongated hole is formed for the following.

The invention according to claim 5 is characterized in that the tip portion of the eccentric driver and the body portion near the tip portion are detachable.

According to the first aspect of the present invention, since the two eccentric drivers are simultaneously rotated by the same angle by rotating the shaft, the leading end is inserted into the positioning hole of the reference member for positioning. Then, by inserting the body into the long hole formed in the member to be positioned and rotating the shaft, the position can be easily adjusted by one person with one hand.

According to the second aspect of the present invention, the two eccentric drivers are simultaneously rotated in the same direction by the same angle by rotating the shaft. By inserting the body into the elongated hole formed in the member to be inserted and positioned and rotating the shaft, the position can be adjusted by sliding the member to be easily positioned by one hand with one hand.

According to the third aspect of the present invention, the two eccentric drivers are simultaneously rotated in the opposite directions by the same angle by rotating the shaft. By inserting the body into the elongated hole formed in the member to be inserted and positioned and rotating the shaft, the member easily positioned with one hand can be rotated by one hand to adjust the position.

According to the invention described in claim 4, the distance between the two eccentric drivers can be arbitrarily changed.
It is possible to cope with a change in the distance between two positioning holes of a member serving as a reference for positioning and the distance between two long holes formed in a member to be positioned.

According to the fifth aspect of the present invention, the tip of the eccentric screwdriver and the body near the tip are detachable, so that the body near the tip can be replaced to determine the positioning reference. It is possible to cope with a change in the diameter of the positioning hole of the member to be formed or the size of the elongated hole formed in the member to be positioned.

[0017]

Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 are views showing an embodiment of an eccentric screwdriver for positioning according to the present invention. This eccentric screwdriver for positioning 1 is composed of a shaft 2 having a threaded portion 2a and whether the eccentric screwdriver is fixed to the shaft 2. A bevel gear 3, a bevel gear 5 supported by the shaft 2 and the housing 4, and having a threaded portion on the inner ring movable left and right by its rotation, and a bevel gear 6A for transmitting the rotational motion from the bevel gears 3, 5 6D, a pair of eccentric drivers 8A and 8C that rotate in opposite directions in response to the rotational movement of the bevel gears 6A to 6D, and a pair of eccentric drivers 8B and 8D that rotate in the same direction.
A housing 10 which supports the above components and has an elongated hole 9 for sliding the housing 4 left and right.
It is composed of

In the eccentric drivers 8A to 8D, tips 8Ab to 8Db including the eccentric pins 8Aa to 8Da are detachable, and by changing the diameter of the tips 8Ab to 8Db, a positioning adjustment (not shown) is performed. It can be selectively used according to the diameter of a long hole formed in a member to be formed. For example, in the present embodiment shown in FIG.
The diameters of the tip portions 8Ab and 8Cb are the same as those of the tip portions 8Bb and 8D.
When the long hole formed of the member smaller than the diameter of b and whose position is adjusted is small, the tip portions 8Ab and 8Cb can be used.

Next, the operation of the eccentric positioning screwdriver 1 having the above configuration will be described in detail with reference to the drawings.

As shown in FIG. 1, when the shaft 2 is rotated in the direction A, the rotational motion of the shaft 2 is transmitted to bevel gears 6A and 6B by the bevel gear 3 fixed to the shaft 2, and fixed to the respective bevel gears 6A and 6B. Eccentric screwdriver 8A, 8
B can be rotated in the same direction (B direction) by the same angle.

On the other hand, bevel gear 5 having a threaded portion on the inner ring
Is supported by the shaft 2 and the housing 4, and by fixing the housing 4 so as not to move, the bevel gear 5 cannot move left and right, and rotates together with the shaft 2.
Thus, the bevel gear 5 transmits the rotational motion to the bevel gears 6C and 6D, similarly to the bevel gear 3, and rotates the eccentric drivers 8C and 8D fixed respectively to the opposite directions (the C direction and the D direction). .

The case where the positioning adjustment of the focusing screen 22 with respect to the optical system 21 shown in FIG. 4 is performed by using the positioning eccentric driver 1 will be described as an example. The eccentric pins 8Ba of the eccentric drivers 8B and 8D, 8Da to long hole 2
2a into the positioning hole 21b of the optical system 21 via
By rotating the eccentric drivers 8B and 8D in the same rotation direction by the same angle, the positioning adjustment of the reticle 22 in the Y direction can be performed. The eccentric pins 8Ba, 8
Da is inserted into the positioning hole 21 of the optical system 21 through the elongated hole 22b.
b, and by performing the same operation, the positioning of the reticle 22 in the Y direction can be adjusted.

The eccentric pins 8Aa and 8Ca of the eccentric drivers 8A and 8C are connected to the optical system 2 through the elongated holes 22b.
1 eccentric screwdriver 8A,
By rotating 8C in the opposite direction by the same angle, positioning adjustment of the focusing screen 22 in the rotation direction can be performed.

Further, in the bevel gear 5, the eccentric driver 8C or 8D is fixed so as not to rotate, so that the bevel gear 5 cannot be rotated. When the shaft 2 is rotated, the slotted hole shown in FIG. In the range of 9, the housing 10 can slide left and right. Thereby, the distance between the eccentric drivers 8A and 8C and the distance between the eccentric drivers 8B and 8D can be adjusted, and the distance between the two positioning holes of the member serving as a positioning reference and the two lengths of the member to be positioned are adjusted. The distance between the eccentric drivers 8A and 8C or the distance between the eccentric drivers 8B and 8D can be adjusted according to the distance between the holes.

[0025]

According to the first aspect of the present invention, the two eccentric drivers are simultaneously rotated by the same angle by rotating the shaft, so that it is not necessary to carefully rotate the driver with both hands or two persons. In addition, it is possible to provide a positioning eccentric driver which can be easily adjusted by one hand with one hand.

According to the second aspect of the present invention, the two eccentric drivers are simultaneously rotated in the opposite directions by the same angle by rotating the shaft.
There is no need for a person to carefully rotate the driver, and a eccentric driver for positioning can be provided which allows a member to be easily positioned with one hand to slide and adjust the position.

According to the third aspect of the present invention, the two eccentric drivers are simultaneously rotated in the opposite directions by the same angle by rotating the shaft.
There is no need for a person to carefully rotate the driver, and a eccentric driver for positioning can be provided which is capable of rotating a member easily positioned with one hand and adjusting the position.

According to the fourth aspect of the present invention, it is possible to cope with a change in the distance between the two positioning holes of the member serving as the reference for positioning and the distance between the two elongated holes formed in the member to be positioned. Therefore, a more versatile positioning eccentric driver can be provided.

According to the fifth aspect of the present invention, it is possible to cope with a change in the diameter of the positioning hole of the member serving as a reference for positioning or the size of the elongated hole formed in the member to be positioned. A versatile positioning eccentric driver can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an eccentric positioning screwdriver according to the present invention.

FIG. 2 is a side view of the eccentric positioning screwdriver shown in FIG. 1;

FIG. 3 is a perspective view illustrating a conventional positioning eccentric driver.

FIG. 4 is a perspective view showing a positioning method using a conventional positioning eccentric driver.

FIG. 5 is a cross-sectional view showing a first example of a conventional positioning method using a positioning eccentric driver.

FIG. 6 is a cross-sectional view showing a second example of a positioning method using a conventional positioning eccentric driver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Positioning eccentric driver 2 Shaft 3 Bevel gear 4 Housing 5 Bevel gear 6A to 6D Bevel gear 8A to 8D Eccentric driver 9 Slot 10 Housing

Claims (5)

[Claims] 1. A housing, a shaft rotatably supported by the housing, and two bevel gears fixed to the shaft at an interval, and a bevel gear meshing with one of the bevel gears is provided at an end. And two eccentric drivers, the tip of which is opposite to the end provided with the bevel gear is formed with a smaller diameter than the body, and the axis of which is eccentric with respect to the axis of the body. An eccentric driver for positioning, wherein the two eccentric drivers rotate simultaneously by the same angle by rotatably supporting the housing in parallel with each other and rotating the shaft. 2. The eccentric driver for positioning according to claim 1, wherein said two eccentric drivers rotate in the same direction as each other. 3. The positioning eccentric driver according to claim 1, wherein the two eccentric drivers rotate in opposite directions. 4. A threaded portion is provided on the shaft, and a threaded portion is formed on one inner ring of the two bevel gears fixed to the shaft so as to be movable with respect to the shaft. A second housing for supporting the eccentric driver having a bevel gear meshing with a gear at an end thereof, and a slot for allowing the second housing to move in the axial direction of the shaft in the housing for supporting the shaft; The eccentric positioning screwdriver according to any one of claims 1 to 3, wherein the eccentric screwdriver is formed. 5. The positioning eccentric driver according to claim 1, wherein said tip portion of said eccentric driver and said trunk portion near said tip portion are detachable.