JP4102469B2 - Eccentric screwdriver for positioning - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a positioning eccentric driver, and more particularly to a positioning eccentric driver used for positioning a focusing screen of an optical system.
[0002]
[Prior art]
Conventionally, as shown in FIG. 4, when the focusing screen 22 is positioned in the optical system 21, as shown in FIG. 3, the axis of the tip 23Aa (23Ba) has a circular section 23Ab (23Bb). As shown in FIG. 4, an eccentric driver 23 </ b> A (23 </ b> B) that is eccentric with respect to the axis of the optical system 21 is prepared. As shown in FIG. Eccentric screwdrivers 23A and 23B are inserted into a pair of adjustment elongated holes 22a (Y-direction adjustment elongated holes) or 22b (X-direction adjustment elongated holes) penetrating through the optical system, and the tip portions 23Aa and 23Ba are connected to the optical system. 21 is inserted into the positioning hole 21b and the eccentric drivers 23A and 23B are rotated in the same rotational direction and at the same angle, thereby moving the focusing screen 22 in the direction E of FIG. State Accordingly, it had done positioning adjustment in the X or Y direction of the focusing 22. In addition, the dotted line of FIG.5 (b) shows the position (position shown to Fig.5 (a)) of the focusing screen 22 before a movement.
[0003]
As shown in FIG. 6, when adjusting the rotation direction of the focusing screen 22 with respect to the optical system 21, the body portions 23Ab of the eccentric drivers 23A and 23B are inserted into the positioning holes 21b (FIG. 4) through the long holes 22b. , 23Bb are inserted and the eccentric drivers 23A, 23B are rotated in opposite directions as indicated by arrows with the tip portions 23Aa, 23Ba as the center, so that the focusing screen 22 is indicated by a two-dot chain line in the figure. To adjust the positioning. Also in this case, in order to rotate the focusing screen 22 around the same rotation center 25, it is necessary to rotate the eccentric drivers 23A and 23B in the opposite direction by the same angle.
[0004]
[Problems to be solved by the invention]
In the conventional positioning adjustment method using the above-mentioned eccentric driver, one operator operates the eccentric driver with both hands, or the two operators hold one by one and rotate at the same angle in the same direction or in the opposite direction simultaneously. Thus, the position adjustment in the X direction, the Y direction, or the rotation direction is performed.
[0005]
However, it is very difficult for one operator to operate two eccentric drivers with both hands, or to have two operators one at a time and to rotate the same angle at the same time, and positioning adjustment takes a long time. It was.
[0006]
Therefore, an object of the present invention is to provide a positioning eccentric driver that can easily rotate two eccentric drivers simultaneously at the same angle and can perform positioning adjustment in a short time.
[0007]
[Means for Solving the Problems]
Invention of claim 1 wherein a housing and a shaft rotatably supported in said housing, and a 2 Tsunokasa gear fixed at intervals to the shaft provided, bevel gears or mesh with one of said bevel gears At the end, the tip opposite to the end provided with the bevel gear is formed with a smaller diameter than the barrel, and the axis of the tip is eccentric with respect to the axis of the barrel an eccentric driver, and rotatably supported in said housing in parallel with each other, by rotating the shaft, a positioning eccentric driver said two eccentric driver is the same angular rotation simultaneously, a threaded portion on said shaft A bevel gear which is provided and 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 and meshes with the bevel gear and the bevel gear A second housing for supporting the eccentric driver having an end portion provided characterized in that said second housing to the housing for supporting the shaft to form a long hole for enabling axial movement of said shaft And
[0008]
The invention according to claim 2 is characterized in that the two eccentric drivers rotate in the same direction.
[0009]
The invention described in claim 3 is characterized in that the two eccentric drivers rotate in directions opposite to each other.
[0010]
The invention according to claim 4 is characterized in that the tip portion of the eccentric driver and the body portion in the vicinity of the tip portion are detachable.
[0012]
According to the first aspect of the present invention, since the two eccentric drivers simultaneously rotate at the same angle by rotating the shaft, the tip portion is inserted into the positioning hole of the member serving as a positioning reference, and the positioning is performed. By inserting the body part into the elongated hole formed in the member to be rotated and rotating the shaft, the position can be easily adjusted by one person with one hand. In addition, since the distance between the two eccentric drivers can be arbitrarily changed, the distance between the two positioning holes of the member serving as a reference for positioning and the distance between the two long holes formed in the member to be positioned Can respond to changes.
[0013]
According to the second aspect of the present invention, since the two eccentric drivers simultaneously rotate in the same direction and at the same angle by rotating the shaft, the tip portion is inserted into the positioning hole of the member serving as a positioning reference, By inserting the body part into the elongated hole formed in the member to be positioned and rotating the shaft, the member can be easily slid by one hand and the position can be adjusted.
[0014]
According to the invention described in claim 3, since the two eccentric drivers simultaneously rotate in the opposite direction by the same angle by rotating the shaft, the tip portion is inserted into the positioning hole of the member serving as a positioning reference, By inserting the body part into the elongated hole formed in the member to be positioned and rotating the shaft, it is possible to adjust the position by rotating the member easily positioned by one hand alone.
[0015]
According to the fourth aspect of the present invention, since the tip portion of the eccentric driver and the barrel portion near the tip portion are detachable, the member serving as a positioning reference can be obtained by replacing the barrel portion near the tip portion. It is possible to cope with a change in the diameter of the positioning hole or the size of the long hole formed in the member to be positioned.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 and FIG. 2 are views showing an embodiment of a positioning eccentric driver according to the present invention. The positioning eccentric driver 1 is a shaft 2 having a threaded portion 2a, and is the shaft 2 fixed to the shaft 2? The bevel gear 3, the bevel gear 5 supported by the shaft 2 and the housing 4 and having a threaded portion on the inner ring that is movable to the left and right by the rotation, and the bevel gear 6A for transmitting the rotational motion from the bevel gears 3 and 5 To 6D, a pair of eccentric drivers 8A and 8C that rotate in opposite directions under the rotational motion of these bevel gears 6A to 6D, a pair of eccentric drivers 8B and 8D that rotate in the same direction, and the above-described configuration The housing 10 has a slot 9 for supporting the elements and sliding the housing 4 to the left and right.
[0018]
In the eccentric drivers 8A to 8D, tip portions 8Ab to 8Db including the eccentric pins 8Aa to 8Da are detachable, and a member whose positioning is not shown is changed by changing the diameter of the tip portions 8Ab to 8Db. Can be selected and used in accordance with the diameter of the long hole drilled in. For example, in the present embodiment shown in FIG. 1, the diameters of the tip portions 8Ab and 8Cb are formed smaller than the diameters of the tip portions 8Bb and 8Db. 8Ab and 8Cb can be used.
[0019]
Next, the operation of the positioning eccentric driver 1 having the above configuration will be described in detail with reference to the drawings.
[0020]
As shown in FIG. 1, when the shaft 2 is rotated in the A direction, the rotational motion of the shaft 2 is transmitted to the bevel gears 6A and 6B by the bevel gear 3 fixed to the shaft 2, and the eccentric driver fixed to each of them. 8A and 8B can be rotated by the same angle in the same direction (B direction).
[0021]
On the other hand, the bevel gear 5 having a threaded portion on the inner ring is supported by the shaft 2 and the housing 4, and the bevel gear 5 cannot move to the left and right by rotating the housing 4 so as not to move. As a result, the bevel gear 5 also transmits rotational motion to the bevel gears 6C and 6D in the same manner as the bevel gear 3, and rotates the eccentric drivers 8C and 8D fixed thereto in the opposite directions (C direction and D direction). .
[0022]
An example of the positioning adjustment of the focusing screen 22 with respect to the optical system 21 shown in FIG. 4 using the positioning eccentric driver 1 will be described. The eccentric pins 8Ba and 8Da of the eccentric drivers 8B and 8D are long. By inserting into the positioning hole 21b of the optical system 21 through the hole 22a and rotating the eccentric drivers 8B and 8D by the same angle in the same rotational direction, the positioning adjustment of the focusing screen 22 in the Y direction can be performed. The eccentric pins 8Ba and 8Da are inserted into the positioning holes 21b of the optical system 21 through the long holes 22b, and the same operation is performed to adjust the positioning of the focusing screen 22 in the Y direction.
[0023]
Further, the eccentric pins 8Aa and 8Ca of the eccentric drivers 8A and 8C are inserted into the positioning holes 21b of the optical system 21 through the long holes 22b, and the eccentric drivers 8A and 8C are rotated in the opposite direction by the same angle. The positioning adjustment of the focusing screen 22 in the rotation direction can be performed.
[0024]
Further, by fixing the eccentric driver 8C or 8D so as not to rotate in the bevel gear 5, the bevel gear 5 also cannot be rotated. When the shaft 2 is rotated, the range of the long hole 9 shown in FIG. Thus, the housing 10 can be slid left and right. Accordingly, the distance between the eccentric drivers 8A and 8C and the distance between the eccentric drivers 8B and 8D can be adjusted. The distance between the two positioning holes of the member serving as a positioning reference and the two lengths of the members 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]
【The invention's effect】
According to the first aspect of the present invention, since the two eccentric drivers simultaneously rotate at the same angle by rotating the shaft, there is no need to carefully rotate the driver with both hands or with two people, and one person with one hand. An eccentric driver for positioning that can be easily adjusted can be provided. Further, since it is possible to cope with changes in the distance between the two positioning holes of the member serving as a positioning reference and the distance between the two long holes formed in the member to be positioned, a more versatile positioning eccentricity Driver can be provided.
[0026]
According to the second aspect of the present invention, since the two eccentric drivers simultaneously rotate in the same direction and the same direction by rotating the shaft, it is not necessary to carefully rotate the driver with both hands or two people. Thus, it is possible to provide a positioning eccentric driver capable of adjusting the position by sliding a member that is easily positioned with one hand.
[0027]
According to the third aspect of the present invention, since the two eccentric drivers simultaneously rotate in the opposite direction of the same angle by rotating the shaft, it is not necessary to carefully rotate the driver with both hands or two people. Thus, it is possible to provide a positioning eccentric driver capable of adjusting the position by rotating a member that is easily positioned with one hand.
[0028]
According to the fourth 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 positioning reference or the size of the long hole formed in the member to be positioned. An eccentric driver for positioning can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a positioning eccentric driver according to the present invention.
2 is a side view of the positioning eccentric driver of FIG. 1; FIG.
FIG. 3 is a perspective view showing 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 positioning method using a conventional 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 thru | or 6D Bevel gear 8A thru | or 8D Eccentric driver 9 Long hole 10 Housing

Claims (4)

A housing, a shaft rotatably supported by the housing, and two bevel gears fixed to the shaft at an interval, and having a bevel gear meshing with one of the bevel gears at an end, Two eccentric drivers in which the tip opposite to the end provided with the bevel gear is formed with a diameter smaller than that of the barrel and the axis of the tip is eccentric with respect to the axis of the barrel are parallel to each other. An eccentric driver for positioning in which the two eccentric drivers rotate at the same angle simultaneously by rotating and supporting the shaft in a housing ,
A bevel gear is provided on the shaft, and the bevel gear and the bevel gear meshing with the bevel gear so as to be movable with respect to the shaft by forming a screw portion on one inner ring of the two bevel gears fixed to the shaft. A second housing for supporting the eccentric driver at the end, and an elongated hole for allowing the second housing to move in the axial direction of the shaft is formed in the housing for supporting the shaft. Eccentric screwdriver for positioning.   The eccentric driver for positioning according to claim 1, wherein the two eccentric drivers rotate in the same direction.   2. The positioning eccentric driver according to claim 1, wherein the two eccentric drivers rotate in directions opposite to each other. The eccentric driver for positioning according to any one of claims 1 to 3, wherein the tip portion of the eccentric driver and the body portion in the vicinity of the tip portion are detachable.

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