JP2017134295A - Fine movement mechanism, altazimuth mount and telescope system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fine movement mechanism, altazimuth mount, and telescope system that highly accurately maintain fixing of a fine movement shaft without making complex adjustments in the fine movement mechanism to be used in the altazimuth mount.SOLUTION: A first fine movement mechanism 101 to be used in an altazimuth comprises: a first rotor that includes a lid body 210a being coupled to a first member, and a box body 210b constituting an enclosure together with the lid body 210a; a second rotor that includes a fine movement shaft 201 being disposed in the first rotor, and including worm gear 202, a worm wheel 207a being disposed in the first rotor to engage with the worm gear 202, and an extension part 207b extending out of the first rotor and being connected to the worm wheel 207a, and is connected to a second member out of the first rotor; and a pressing member 212 that presses the fine movement shaft 201 toward the engagement of the worm gear 202 with the worm wheel 207a thanks to fixing force of the lid body 210a to the box body 210b.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a fine movement mechanism used in a telescope, a graticule including the fine movement mechanism, and a telescope system including the fine movement mechanism.

  Conventionally, as a mechanism for supporting an astronomical telescope or the like and adjusting the orientation of the astronomical telescope or the like, a graticule has been used as the simplest one. The graticule is a frame composed of two axes, a horizontal axis and a vertical axis perpendicular to it. The structure is simple, easy to process, inexpensive to manufacture, easy to understand, and is often used as a small-aperture telescope for beginners. ing.

  The graticule can adjust the horizontal direction of the telescope by finely moving the horizontal axis with the handle, and can adjust the altitude of the telescope by finely moving the vertical axis perpendicular to the horizontal axis with the handle. it can. As a typical example of the graduation stand, there is known one that variably supports the altitude of the telescope by an arm called a fork type or a one-handed fork type.

  The graticule has a fine movement mechanism as a mechanism for adjusting the horizontal direction and vertical direction of the telescope. In the fine movement mechanism, a worm gear is provided on a fine movement shaft connected to one member, a worm wheel meshing with the worm gear is connected to the other member, and the worm wheel rotates as the worm gear rotates, and the one member and the other This is a mechanism for relative rotation of the members.

  The fine movement mechanism is equipped with a fine movement handle to facilitate the rotation operation on the fine movement axis. By rotating the fine movement handle, the fine movement axis rotates and the direction of the telescope can be rotated by a minute angle. Has been.

  The fine movement mechanism needs to adjust the force to push the fine movement shaft to the worm wheel side so that the meshing state of the worm gear and worm wheel is in the proper meshing state in order to determine the accuracy of the rotation angle of the telescope. The fine movement shaft is appropriately tightened with screws or the like from the side opposite to the wheel gear of the fine movement shaft to generate a pressing force.

JP2015-180948A

  However, in the fine movement mechanism, adjusting the optimum pressing force to the worm wheel side with a screw or the like causes problems such as fine adjustment at the time of initial shipment of the product and complicated initial setting at the time of observation.

  In addition, it is difficult for the fine movement mechanism described above to adjust the optimum pressing force to the worm wheel side with screws, etc., and the meshing state of the worm gear and worm wheel changes due to loosening or impact of the screws, and the rotation accuracy of the telescope is improved. It is also assumed that it will deteriorate.

  Further, in the fine movement mechanism as described above, when the meshing state of the worm gear and the worm wheel is deteriorated, the gear portion rattles, and there is a possibility that abnormal noise is generated and the gear blade is worn.

  The present invention has been made in view of such a problem, and an object of the present invention is to realize an appropriate pressing force to the worm wheel side of the fine movement shaft without any special adjustment, while maintaining the precision of the fine movement mechanism. It is an object of the present invention to provide a fine movement mechanism, a pedestal stand, and a telescope system that are easy to handle even for beginners.

  In order to solve the above-described problem, a fine movement mechanism according to the present invention is a fine movement mechanism used for a graduation table, and includes a lid body connected to a first member, and a box body that constitutes a casing together with the lid body. A fine rotating shaft having a first gear disposed within the first rotating body, and a second gear disposed within the first rotating body and engaged with the first gear. A second rotating body that extends outside the first rotating body and is connected to the second gear, and is connected to the second member outside the first rotating body, and a lid. A pressing member that presses the fine movement shaft in a direction in which the first gear and the second gear engage with each other by a fixing force with the box is provided.

  In order to solve the above-described problems, the background table according to the present invention includes at least one fine movement mechanism, and the fine movement mechanism forms a casing together with the lid body connected to the first member. A first rotating body having a box body to be operated, a fine movement shaft disposed in the first rotating body and having a first gear, and a first rotating body disposed in the first rotating body and engaged with the first gear. A second rotating body that has two gears and an extending portion that extends outside the first rotating body and is connected to the second gear, and is coupled to the second member outside the first rotating body; The pressing member has a pressing member that presses the fine movement shaft in a direction in which the first gear and the second gear are engaged by a fixing force between the lid and the box.

  Furthermore, in order to solve the above-described problems, a telescope system according to the present invention includes at least one fine movement mechanism that can change a telescope main body in a desired direction, a telescope base connected to the graticule base, and a history base. A fine rotating mechanism including a lid connected to the first member, a box that forms a housing together with the lid, and a first rotation. A fine movement shaft disposed within the body and having a first gear, a second gear disposed within the first rotating body and engaged with the first gear, and a second gear extending outside the first rotating body and A second rotating body connected to the second member outside the first rotating body, and the fine gear shaft by the fixing force between the lid and the box. And a pressing member that presses in the direction in which the second gear is engaged.

  According to such an aspect, the fine movement shaft is pressed against the worm wheel by the pressing member using the force for fixing the housing, so that the worm gear of the fine movement shaft can be properly engaged with the worm wheel without a special pressing adjustment mechanism. In addition, the precision of the fine movement mechanism can be maintained, and fine adjustment of the pressing force is not necessary, so that even a beginner can handle it easily.

  According to the present invention, it is possible to provide an abutment table and a telescope system that do not require fine adjustment of the pressing force of the fine movement shaft in a fine movement mechanism of the abutment table that is widely used for beginners and that are easy to handle even for beginners.

FIG. 1 is a front view illustrating a telescope system. FIG. 2 is a perspective view for explaining the graduation table. FIG. 3 is another perspective view for explaining the graduation table. FIG. 4 is an exploded perspective view for explaining the structure of the graticule. FIG. 5 is an exploded perspective view for explaining the first fine movement mechanism and the second fine movement mechanism. FIG. 6 is a plan view of the first fine movement mechanism and the second fine movement mechanism as seen from the back side. FIG. 7 is a plan view of the first fine movement mechanism and the second fine movement mechanism as viewed from the fine movement shaft side. FIG. 8 is a plan view of the first fine movement mechanism and the second fine movement mechanism as viewed from the side. FIG. 9 is a plan view of the first fine movement mechanism and the second fine movement mechanism as seen from the surface. 10 is a cross-sectional view of the first fine movement mechanism and the second fine movement mechanism, FIG. 10A is a cross-sectional view taken along line AA in FIG. 9, and FIG. 10B is taken along line BB in FIG. It is sectional drawing. FIG. 11 is a perspective view for explaining the first arm member and the second arm member, FIG. 11A is a perspective view seen from the back side, and FIG. 11B is seen from the front side. It is a perspective view. FIG. 12 is a perspective view illustrating the connecting portion. FIG. 13 is a perspective view for explaining the third cover member and the fourth cover member. FIG. 14 is a plan view of the lid and the fine movement shaft as seen from the back side. FIG. 15 is a perspective view of the lid and the fine movement shaft as seen from the back side. FIG. 16 is a perspective view illustrating a state in which the pressing member is attached. FIG. 17 is another perspective view illustrating a state in which the pressing member is attached. FIG. 18 is a perspective view illustrating the pressing member. FIG. 19 is a side view illustrating the inclined portion of the pressing member. FIG. 20 is a side view illustrating a modification of the pressing member. FIG. 21 is a perspective view illustrating a state in which the pressing member according to the modification is attached. FIG. 22 is a side view illustrating a pressing member in a modified example.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS A history table to which the present invention is applied will be described in detail below with reference to the drawings. It should be noted that the present invention is not limited to the following embodiments, and various modifications can be made without departing from the scope of the present invention. Further, the drawings are schematic, and the ratio of each dimension may be different from the actual one. Specific dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

[About the telescope system]
First, the telescope system will be briefly described with reference to FIG. As shown in FIG. 1, the telescope system 1 includes a one-handed fork-type graticule 10 capable of operating two arm members, which will be described later, and a telescope body 20 held on the graticule 10, And a support device 30 for supporting the pedestal table 10.

  The telescope system 1 is assembled and used by mounting the graticule 10 on a support device 30 composed of, for example, a tripod, and mounting the telescope body 20 on the graticule 10.

  Since the telescope body 20 and the support device 30 are general-purpose devices, detailed description thereof will be omitted, but parts necessary for explaining the technical features of the telescope system 1 and the graduation table 10 will be briefly described below. Explained.

[About the telescope body]
The telescope body 20 has an objective optical system. For example, various optical systems such as a refractive type using an objective lens and a reflective catadioptric type using a concave reflecting mirror are selected depending on the application. Can do. The telescope main body 20 is used while being supported so as to be able to track a celestial body by operating a fine movement mechanism of the graduation base 10 mounted on the support device 30.

  For example, as shown in FIG. 1, the telescope body 20 is connected to a refractive objective lens 21, a lens barrel 22 that holds the objective lens 21, a lens barrel band 23 that holds the lens barrel, and a lens barrel band 23. And a convex portion 24 that engages a lens barrel mounting concave portion, which will be described later. Although not shown in FIG. 1, it goes without saying that the telescope body 20 may include a guide scope, an eyepiece lens, and the like.

  When the telescope body 20 is of a refraction type using an objective lens, the eyepiece shares the optical axis with the objective lens 21 and is attached in front of the lens barrel 22 (front side in FIG. 1). Are attached to the rear of the lens barrel 22 (in the depth direction in FIG. 1) so as to be arranged in a straight line. Further, if the telescope body 20 is a refraction type using the objective lens 21, unlike the reflection type telescope, there is no need to fold back the optical path by reflection, so that the total length of the lens barrel 22 that secures the entire optical path length becomes long. Tend.

[Supporting device]
As shown in FIG. 1, for example, a tripod can be used as the support device 30. The support device 30 includes a tripod mechanism that can be folded by connecting an extendable leg 31 to a central part 32. The tripod has an advantage that the leg portion 31 is made of a lightweight metal such as aluminum, so that it has excellent transportability while ensuring strength. The support device 30 is not limited to a tripod, and may be a pillar leg that places importance on installation stability, and does not preclude substitution with a base plate that is installed on the ground as it is.

[About the background]
As shown in FIGS. 2 and 3, the theft 10 includes a base portion 100 connected to the support device 30, a first fine movement mechanism 101 that is provided on the base portion 100 and can be rotated in the horizontal direction, One end is connected to the fine movement mechanism 101, extends in the horizontal direction from the first fine movement mechanism, and rotates in the horizontal direction with respect to the base portion 100 by the operation of the first fine movement mechanism 101. An arm member 102; a second arm member 103 extending from the other end of the first arm member 102 in a direction perpendicular to the first arm member 102; a second end of the first arm member 102; One end of the arm member 103 is connected, and the telescope body 20 is connected to a connecting portion 104 that supports the first arm member 102 so that the second arm member 103 can rotate in the vertical and horizontal directions. Telescope connection 10 6 and a second fine movement mechanism 105 that is connected to the other end of the second arm member 103 and is connected to the telescope connecting portion 106 and is rotatable in the vertical direction.

  Further, the stage 10 is connected to the first cover member 151 that covers the connection portion between the first fine movement mechanism 101 and the first arm member 102, and the connection between the second fine movement mechanism 105 and the second arm member 103. A second cover member 152 covering the portion, a third cover member 153 covering the connection portion between the first arm member 102 and the connecting portion 104, and a second cover member covering the connection portion between the second arm member 103 and the connecting portion 104. 4 cover members 154.

[Detailed structure of the background]
Next, each configuration and detailed structure of the graduation table 10 will be described using the exploded perspective view shown in FIG.

  First, the base portion 100 is a component that serves as a base for mounting the entire graticule 10 to the support device 30 and has a substantially cylindrical shape, as shown in FIG. 1, below the central portion 32 of the support device 30. To the support device 30 by screws 100a or the like.

  Next, as shown in FIGS. 5 to 10, the first fine movement mechanism 101 includes a fine movement shaft 201, a first convex portion 203 on the back surface 101a side, and a second convex portion 204 on the front surface 101b side. And has a substantially cylindrical shape. In the first fine movement mechanism 101, the second convex portion 204 is fixed to the base portion 100, the first convex portion 203 is fixed to the first arm member 102, and the first convex portion 203 and the second convex portion are fixed. The unit 204 is configured to be rotatable relative to each other by sharing a rotation axis.

  The first fine movement mechanism 101 rotates the fine movement shaft 201 with a fine movement handle or the like (not shown) so that the portion connected to the first convex portion 203 and the portion connected to the second convex portion 204 are relative to each other. The first arm member 102 is rotated in the horizontal direction with respect to the base portion 100.

  The first fine movement mechanism 101 is provided with a worm gear 202, which will be described later, on the fine movement shaft 201. By rotating a worm wheel 207a that meshes with the worm gear 202, the first fine movement mechanism 101 is connected to the first convex portion 203 and the first fine movement mechanism 101. The portion connected to the second convex portion 204 is configured to be relatively rotated. The fine movement shaft 201 is provided with a chamfered portion 201a, and a fine movement handle or the like is attached by screwing or the like using this portion.

  Next, as shown in FIG. 11, the first arm member 102 is a substantially planar arm member that is connected to the first fine movement mechanism 101 and extends in the horizontal direction. When viewed from the back surface 102a side, the first arm member 102 is provided with an opening 110 at one end and an opening 111 at the other end, as shown in FIG. Similarly, when viewed from the surface 102b side, the first arm member 102 is provided with an opening 110 at one end and an opening 111 at the other end, as shown in FIG.

  The first arm member 102 can be formed of, for example, a metal material such as aluminum as a lightweight and high-strength member. The first arm member 102 can be easily mass-produced by a technique such as die-casting using an aluminum material. However, as shown in FIG. The structure is such that the middle part is cut out and the strength is maintained by the ribs 112.

  As shown in FIG. 4, the first arm member 102 has a cover plate 113 that covers the rib 112 in the middle part of the arm structure. The first arm member 102 covers the rib 112 with the cover plate 113 to reduce unevenness on the back surface 102a, making it easy for the user to handle and making a stylish appearance even with a thinned structure. Can keep.

  The first arm member 102 is connected to the first fine movement mechanism 101 by inserting the second convex portion 204 of the first fine movement mechanism 101 into the opening 110 from the front surface 102b side at one end, and is connected to the first fine movement mechanism 101 at the other end. A first support shaft 301 of the connecting portion 104 described later is inserted into the opening 111 from the side and connected to the connecting portion 104.

  The first arm member 102 has a plurality of radial grooves 114 around the opening 111 on the back surface 102a side. The groove portion 114 is provided in a shape corresponding to a first claw portion 303 of the connecting portion 104 to be described later, and the first arm member 102 and the connecting portion 104 are engaged with the first claw portion 303. Can be fixed so as not to rotate around the first support shaft 301.

  Next, as shown in FIGS. 4 and 12, the connecting portion 104 is a member that connects the first arm member 102 and the second arm member 103. The connecting portion 104 includes a first support shaft 301 that stands vertically from the center of the first surface 104a and a second shaft that stands vertically from the center of the second surface 104b orthogonal to the first surface 104a. A support shaft 302 is provided. Therefore, it can be said that the first support shaft 301 and the second support shaft 302 are orthogonal to each other.

  Further, the connecting portion 104 has a radial first claw portion 303 on the first surface 104 a centering on the first support shaft 301, and the second surface centering on the second support shaft 302. A radial second claw portion 304 is provided on 104b.

  The first support shaft 301 and the second support shaft 302 are constituted by rod-shaped members having a helical thread groove. The first support shaft 301 is inserted into the opening 111 of the first arm member 102 and is fixed by screwing. The second support shaft 302 is inserted into an opening 121 of the second arm member 103 described later, and is fixed by screwing.

  In addition, the screwing is performed by rotating the third cover member 153 and the fourth cover member 154 in which the nut portion 153a and the nut portion 154a shown in FIG. 13 are embedded, so that the nut portion 153a and the nut portion 154a are moved to the first portion. It can be realized by tightening to the support shaft 301 and the second support shaft 302. The cover member 153 and the fourth cover member 154 are provided with a circular outer peripheral groove 153b and an outer peripheral groove 154b, and are configured to be easily loosened or tightened by hand for the rotational operation described later.

  Next, as shown in FIG. 11, the second arm member 103 is a substantially planar arm member that is connected to the connecting portion 104 and extends in the vertical direction. When viewed from the back surface 103a side, the second arm member 103 is provided with an opening 121 at one end and an opening 120 at the other end, as shown in FIG. Similarly, when viewed from the front surface 103b side, the second arm member 103 is provided with an opening 121 at one end and an opening 120 at the other end, as shown in FIG.

  The second arm member 103 can be formed of, for example, a metal material such as aluminum as a lightweight and high-strength member. The second arm member 103 can be easily mass-produced by a technique such as die-casting using an aluminum material. However, as shown in FIG. The structure is such that the midway portion is thinned and the strength is maintained by the ribs 122.

  As shown in FIG. 4, the second arm member 103 has a cover plate 123 that covers the rib 122 in the middle part of the arm structure. The second arm member 103 covers the rib 122 with the cover plate 123, thereby reducing the unevenness on the back surface 103a, facilitating the user's handling, and having a slim structure even in a stylish appearance. Can keep.

  The second arm member 103 is connected to the connecting portion 104 by inserting the second support shaft 302 of the connecting portion 104 into the opening 121 from the back surface 103a side at one end, and connected to the opening 120 from the front surface 103b side at the other end. The first convex portion 223 of the second fine movement mechanism 105 is inserted and connected to the second fine movement mechanism 105.

  The second arm member 103 has a plurality of radial grooves 124 on the outer periphery of the opening 121 on the back surface 103a side. The groove portion 124 is provided in a shape corresponding to the second claw portion 304, and the second arm member 103 and the connecting portion 104 are engaged with the second claw portion 304, whereby the second support shaft is used. It can fix so that it may not rotate centering on 302. FIG.

  Here, as shown in FIG. 11, the second arm member 103 is the same member as the first arm member 102, so that the effect of reducing the component management cost and the manufacturing cost by reducing the types of components is expected. This is preferable.

  Next, as shown in FIGS. 5 to 10, the second fine movement mechanism 105 has a fine movement shaft 221, a first convex portion 223 on the back surface 105a side, and a second convex portion 224 on the front surface 105b side. It has a substantially cylindrical shape. In the second fine movement mechanism 105, the first convex portion 223 is fixed to the second arm member 103, the second convex portion 224 is fixed to the telescope connecting portion 106, and the first convex portion 223 and the second convex portion 223 are The convex portion 224 is configured to be rotatable relative to each other by sharing a rotation axis.

  The second fine movement mechanism 105 rotates the fine movement shaft 221 with a fine movement handle or the like (not shown) so that the portion connected to the first convex portion 223 and the portion connected to the second convex portion 224 are relative to each other. The telescope connecting portion 106 is rotated in the horizontal direction with respect to the second arm member 102. That is, when viewed from the entire telescope system 1, the second fine movement mechanism 105 rotates the telescope connection unit 106 in the vertical direction.

  The second fine movement mechanism 105 is provided with a worm gear 222 to be described later on the fine movement shaft 221, and a portion connected to the first convex portion 223 by rotating a worm wheel 227a to be described later that meshes with the worm gear 222. The portion connected to the second convex portion 224 is relatively rotated. The fine movement shaft 221 is provided with a chamfered portion 221a, and a fine movement handle or the like is attached by screwing or the like using this portion.

  Here, as shown in FIGS. 5 to 10, the second fine movement mechanism 105 has the same configuration as that of the first fine movement mechanism 101, so that the parts management cost can be reduced and the manufacturing cost can be reduced by reducing the number of parts. Can be expected.

  In the first fine movement mechanism 101 and the second fine movement mechanism 105, a fine movement handle (not shown) is attached to the fine movement shaft 201 and the fine movement shaft 221. However, in addition to the shaft rotation by manual operation of the handle, the motor drive device Needless to say, the shaft may be rotated.

  Next, the telescope connecting portion 106 includes a telescope fixing screw 160, a telescope fixing screw 161, and a groove portion 106a. The convex portion 24 of the telescope body 20 is fitted into the groove portion 106a, and the telescope fixing screws 160 and 161 are screwed in. Thus, the convex portion 24 can be pressed and fixed in the groove portion 106a. As a result, the pedestal table 10 can stably hold the telescope body 20.

  The telescope system 1 configured as described above allows the first arm member 102 and the second arm member 103 of the graduation base 10 to freely rotate in the horizontal rear and vertical directions using the connecting portion 104, respectively. Can do.

[Detailed structure of fine movement mechanism]
Next, the structure of the first fine movement mechanism 101 and the second fine movement mechanism 105 will be described in detail. Note that the first fine movement mechanism 101 and the second fine movement mechanism 105 are described as being composed of the same member, but only the first fine movement mechanism 101 is described. However, the second fine movement mechanism 105 has the same configuration. To do. The reference numerals of the respective parts in the second fine movement mechanism 105 are shown in parentheses together with the explanation of the first fine movement mechanism 101, and the description is omitted.

  First, as shown in FIGS. 5 to 10, the first fine movement mechanism 101 (second fine movement mechanism 105) is coupled to the first arm member 102 (telescope connecting portion 106) that is the first member. A first rotating body 210 (230) having a lid 210a (230a) and a box 210b (230b) that forms a casing together with the lid 210a (230a), and in the first rotating body 210 (230) A fine movement shaft 201 (221) having a worm gear 202 (222) as a first gear, and a second gear engaged with the worm gear 202 (222) in the first rotating body 210 (230). A certain worm wheel 207a (227a) and an extending portion 207b (227b) extending outside the first rotating body 210 (230) and connected to the worm wheel 207a (227a) The fine rotation shaft 201 (221) is engaged with the worm gear 202 (222) and the worm wheel 207a (227a) by the fixing force of the second rotating body 211 (231), the lid 210a (230a), and the box 210b (230b). And a pressing member 212 (232) that presses in a matching direction.

  The lid 210a (230a) constitutes a part of the housing, covers the opening of the box 210b (230b), and is fixed to the box 210b (230b) with screws 219 (239). . The lid 210a (230a) has a substantially cylindrical second convex portion 204 (224) that protrudes toward the back surface 101b (105b) side of the first fine movement mechanism 101 (second fine movement mechanism 105). . Therefore, the lid 210a (230a) is coupled to the first arm member 102 (the telescope connecting portion 106), which is the first member, via the second convex portion 204 (224).

  The box body 210b (230b) constitutes a part of the housing, has a substantially cylindrical outer wall, has a top surface released, and an opening through which a part of the second rotating body 211 (231) passes through the bottom surface. And has a structure in which a part of the side surface is released to arrange the fine movement shaft 201 (221). The box 210b (230b) covers the released part with the lid 210a (230a), and the detailed structure will be described later.

  The lid body 210a (230a) and the box body 210b (230b) are screwed and fixed by three screws 219 (239) arranged by dividing the circumference into three equal parts to constitute a housing having an internal space. At the same time, a first rotating body 210 (230) that rotates relative to the second rotating body 211 (231) is formed.

  The fine movement shaft 201 (221) has a worm gear 202 (222) at the center of the shaft, and a first enlarged diameter portion 205 (225) and a second enlarged diameter portion 206 (226) at both ends of the worm gear 202 (222). And is housed in a housing portion 210c (230c) configured by a lid body 210a (230a) and a box body 210b (230b).

  As shown in FIG. 10B, the pressing member 212 (232) is in contact with the lid 210a (230a) and the first enlarged diameter portion 205 (225) and the second enlarged portion of the fine movement shaft 201 (221). As shown in FIGS. 18 and 19, it contacts the first enlarged portion 205 (225) and the second enlarged portion 206 (226) of the fine movement shaft 201 (221). The contact surface includes an inclined surface 212a (232a). The pressing member 212 (232) has an inclined surface 212a (232a) inclined toward the worm wheel 207a (227a).

  In the pressing member 212 (232), the inclined surface 212a (232a) is inclined toward the worm wheel 207a (227a), so that the lid 210a (230a) and the box 210b (230b) are screwed by the screw 219 (239). The first enlarged diameter portion 205 of the fine movement shaft 201 (221) is aligned with the direction of the inclined surface 212a (232a) when pushed into the lid 210a (230a) side by the box 210b (230b) when fixed. (225) and the second enlarged diameter portion 206 (226) are generated to press the worm wheel 207a (227a) side as indicated by an arrow in FIG. 10B.

  The pressing member 212 (232) does not prevent the inclined surface 212a (232a) from being curved as shown in FIG. 20, but the fine movement shaft 201 (221) is pressed against the worm wheel 207a (227a). An inclined surface 212a (232a) using a flat surface as shown in FIG. 19 is preferably used so that the force can be appropriately distributed. In this embodiment, when the angle of the inclined surface 212a (232a) is 45 degrees, the pressing member 212 (232) is fixed to the lid 210a (230a) and the box 210b (230b) by the screw 219 (239). The applied force is divided in half so that the fine movement shaft 201 (221) is pressed against the worm wheel 207a (227a).

  The pressing member 212 (232) is softer and finer than the first enlarged diameter portion 205 (225) and the second enlarged diameter portion 206 (226) of the fine movement shaft 201 (221) made of a hard metal such as brass. The shaft 201 (221) is formed of a material capable of pressing the first enlarged diameter portion 205 (225) and the second enlarged diameter portion 206 (226) to the worm wheel 207a (227a) side by an elastic force. It is preferable. For example, as a material capable of sufficiently pressing the first enlarged diameter portion 205 (225) and the second enlarged diameter portion 206 (226) of the fine movement shaft 201 (221) while having an elastic force, an ABS resin is used. Etc. are suitable.

  The gear member 207 (227) has a cylindrical extending portion 207b (227b), the end of the extending portion 207b (227b) extends in a flange shape, and the end surface of the flange is continuous in the circumference. The wheel 207a (227a) is configured. The gear member 207 (227) is connected to the first convex portion 203 (223) and constitutes a second rotating body 211 (231).

  In addition, the 1st thrust washer 213 (233) shown in a figure is connected to the extension part 207b (227b), contact | abuts to the inner wall of the box 210b (230b), and the gear member 207 (227) rotates. It has a function to receive the thrust force.

  Further, the second thrust washer 214 (234) shown in the figure is disposed between the box 210b (230b) and the first convex portion 203 (223), and the extending portion 207b (227b) communicates with the second thrust washer 214 (234). Then, the first convex portion 203 (223) connected to the gear member 207 (227) contacts the outer wall of the box 210b (230b) and has a function of receiving a thrust force when rotating.

  The 1st convex part 203 (223) has a cylindrical shape, and has the opening part 203a (223a) which the extension part 207b (227b) of the gear member 207 (227) penetrates. The first projecting portion 203 (223) is connected to the gear member 207 (227) by screwing and fixing the unillustrated extension portion 207b (227b) of the gear member 207 (227) into the opening 203a (223a). Fixed.

  A third thrust washer 215 (235) is further inserted into the distal end of the extending portion 207b (227b) of the gear member 207 (227), and the distal end portion of the extending portion 207b (227b) is fixed by the fixing block 216 (236). The first convex portion 203 (223) is configured not to fall off.

  As described above, the first convex portion 203 (223) constitutes the second rotating body 211 (231) together with the gear member 207 (227), and is rotatable relative to the first rotating body 210 (230). Has been.

  As described above, the first fine movement mechanism 101 (second fine movement mechanism 105) is constituted by each part, and the worm gear 202 (222) is rotated by the rotation of the fine movement shaft 201 (221), and is engaged with the worm gear 202 (222). The worm wheel 207a (227a) to be combined is rotated, and the first rotating body 210 (230) and the second rotating body 211 (231) are relatively rotated.

[Mounting method of fine movement axis]
Next, the mounting method of fine movement shaft 201 (221) will be described in detail together with the structure.

  The first rotating body 210 (230) has a storage portion 210c (230c) that stores the fine movement shaft 201 (221) on the side of the lid 210a (230a) facing the box 210b (230b). The storage portion 210c (230c) of the fine movement shaft 201 (221) may be configured by one or both of the lid 210a (230a) and the box 210b (230b).

  As shown in FIGS. 14 and 15, the specific structure is that the lid 210a (230a) is erected from the surface of the lid 210a (230a) facing the box 210b (230b), and the release portion of the box 210b (230b) is provided. The side wall 210d (230d) covers the inner wall 210e (230e) and the inner wall 210f (230f), and the side wall 210d (230d), the inner wall 210e (230e), and the inner wall 210f. A storage portion 210c (230c) that holds the fine movement shaft 201 (221) is configured in a space provided between (230f).

  The inner wall 210e (230e) and the inner wall 210f (230f) are separated from each other at positions corresponding to the first enlarged diameter portion 205 (225) and the second enlarged diameter portion 206 (226) of the fine movement shaft 201 (221). It has a substantially U-shaped wall surface that is provided and rotatably holds the first enlarged diameter portion 205 (225) and the second enlarged diameter portion 206 (226).

  Further, the side wall 210d (230d) is a portion facing the inner wall 210e (230e) and the inner wall 210f (230f), that is, the first enlarged diameter portion 205 (225) and the second enlarged diameter portion of the fine movement shaft 201 (221). A substantially U-shaped wall surface that rotatably holds the first enlarged diameter portion 205 (225) and the second enlarged diameter portion 206 (226) is provided at a position corresponding to 206 (226).

  The side wall 210d (230d), the inner wall 210e (230e), and the inner wall 210f (230f) are substantially U-shaped walls, respectively, of the first enlarged diameter portion 205 (225) and the second enlarged diameter portion 206 (226). The fine projection shaft 201 (221) is held at a predetermined position in the thrust direction by the protruding portion so as to hold the side surface.

  Note that the side wall 210d (230d), the inner wall 210e (230e), the protruding portion of the inner wall 210f (230f), and the outer side surface of the first enlarged diameter portion 205 (225) and the second enlarged diameter portion 206 (226). Between, a first soft washer 208 (228) and a second soft washer 209 (229) are inserted.

  The first soft washer 208 (228) and the second soft washer 209 (229) are made of a soft member such as nylon, and the inner diameter is the shaft diameter of the fine movement shaft 201 (221). The diameter is set to be slightly larger than the outer diameter of the first enlarged portion 205 (225) and the second enlarged portion 206 (226).

  The thickness W1 of the first soft washer 208 (228) and the second soft washer 209 (229) is set such that the widths of the first enlarged portion 205 (225) and the second enlarged portion 206 (226) are W2. When the substantially U-shaped wall surfaces of the side wall 210d (230d), the inner wall 210e (230e), and the inner wall 210f (230f) are W3, it is preferable to satisfy the relationship of W1 + W2> W3.

  The first soft washer 208 (228) and the second soft washer 209 (229) are inserted into the fine movement shaft 201 (221) from both ends of the fine movement shaft 201 (221), respectively, and the lid 210a (230a). Is attached to the storage portion 210c (230c) of the slab, but when the thickness W1 is appropriately set as described above, it is in a press-fitted state and is elastically deformed when the fine movement shaft 201 (221) is attached to the lid 210a (230a). Then, the fine movement shaft 201 (221) is pressed in the axial direction in the central direction, and the fine movement shaft 201 (221) can be maintained at an appropriate position without using a separate adjustment means.

  In addition, the first soft washer 208 (228) and the second soft washer 209 (229) are larger than the outer diameters of the first enlarged portion 205 (225) and the second enlarged portion 206 (226). Therefore, when the lid body 210a (230a) and the box body 210b (230b) are tightened by hand with the screws 219 (239), they are pressed and deformed by a minute amount in the radial direction, thereby positioning the radial direction. The first and second enlarged diameter portions 205 (225) and 206 (226) can contact the side wall 210d (230d), the inner wall 210e (230e), and the inner wall 210f (230f). Excessive stress is not generated on the surface, and the fine movement shaft 201 (221) can be smoothly rotated.

  When the diameters of the first soft washer 208 (228) and the second soft washer 209 (229) are larger than those of the first enlarged portion 205 (225) and the second enlarged portion 206 (226), There is a possibility that the pressing member 213 (223) described above does not come into contact with the first enlarged diameter portion 205 (225) and the second enlarged diameter portion 206 (226) and is in a floating state. Therefore, in this case, it is preferable that the width W4 of the pressing member 212 (232) is equal to or less than the width W2 of the first enlarged diameter portion 205 (225) and the second enlarged diameter portion 206 (226).

[Assembly method of pressing member]
Next, a method of assembling the pressing member 212 (232) will be described.

  First, as shown in FIG. 15, with the fine movement shaft 201 (221) press-fitted into the lid 210a (230a), the back surface of the lid 210a (230a) faces upward so that the fine movement shaft 201 (221) can be seen. As shown in FIG. 16, the pressing member 212 (232) is placed from above.

  After the pressing member 212 (232) is placed, the lid 210a (230a) and the box 210b (230b) are connected by covering the box 210b (230b), and fixed with screws 219 (239).

  As shown in FIG. 17, a lid 210a (230a) and a box 210b (230b) in which a pressing member 212 (232) is previously attached to the box 210b (230b) and a fine movement shaft 201 (221) is press-fitted. May be connected and fixed with screws 219 (239).

  In the case shown in FIG. 17, the box body 210b (230b) and the pressing member 212 (232) may be integrally formed, or may be configured by the same member.

  In the case shown in FIG. 17, as shown in FIG. 21, positioning protrusions 210g (230g) are provided on the box 210b (230b), and the pressing member 212 (230g) is placed as shown in FIG. 232) may be provided with a recess 212b (230b) corresponding to the positioning protrusion 210g (230g).

The pressing member 212 (232) is positioned by fitting the positioning convex portion 210g (230g) and the concave portion 212b (232b). However, the pressing member 212 (232b) is pressed against the box body 210b (230b) by fixing by press fitting or fixing by an adhesive. The member 212 (232) may be fixed.

  The first fine movement mechanism 101 (second fine movement mechanism 105) configured as described above can be fixed so that the fine movement shaft 201 (221) is pressed by the pressing member 212 (232), and the worm gear 202 (222). ) Can press the worm wheel 207a (227a) with an appropriate force.

  Therefore, the scale 10 and the telescope system 1 including the first fine movement mechanism 101 (second fine movement mechanism 105) configured as described above perform fine adjustment at the time of initial shipment of the product and initial setting at the time of observation. It can be unnecessary.

  In addition, the abutment platform 10 and the telescope system 1 including the first fine movement mechanism 101 (second fine movement mechanism 105) prevent changes in the meshing state of the worm gear and the worm wheel due to loosening of the screw or impact, and the rotation accuracy of the telescope. Can be maintained.

  Further, the graticule 10 and the telescope system 1 including the first fine movement mechanism 101 (second fine movement mechanism 105) prevent the gear portion from rattling and generate abnormal noise and wear the gear blade. Nor.

  As described above, the abutment table 10 and the telescope system 1 including the first fine movement mechanism 101 (second fine movement mechanism 105) can finely adjust the pressing force of the fine movement shaft in the fine movement mechanism of the graticule widely used for beginners. It becomes easy to handle even for beginners.

  In the above, this invention was demonstrated based on the Example and the modification. The present invention is not limited to the contents of the above-described embodiments and modifications, and various modifications can be made within the scope of the gist of the present invention. It will be understood by those skilled in the art that the above-described embodiments and modifications are exemplifications, and various additions can be made to combinations of the respective components, and such modifications are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Telescope system, 10 Graticule stand, 20 Telescope main body, 21 Objective lens, 22 Lens barrel, 23 Lens barrel band, 24 Convex part, 30 Support device, 31 Leg part, 32 Center part, 100 Base part, 100a Screw, 101 1st 1 fine movement mechanism, 101a back surface, 101b surface, 102 first arm member, 101a back surface, 102b surface, 103 second arm member, 103a back surface, 103b surface, 104 connecting portion, 104a first surface, 104b second Surface, 105 second fine movement mechanism, 105a back surface, 105b surface, 106 telescope connecting portion, 106a groove portion, 110 opening portion, 111 opening portion, 112 rib, 113 cover plate, 114 groove portion, 120 opening portion, 121 opening portion, 122 rib, 123 cover plate, 124 groove, 151 first Bar member, 152 second cover member, 153 third cover member, 153a nut portion, 153b outer peripheral groove, 154 fourth cover member, 154a nut portion, 154b outer peripheral groove, 160 telescope fixing screw, 161 telescope fixing screw, 201 fine movement shaft, 201a chamfered portion, 203 first convex portion, 203a opening, 204 second convex portion, 205 first enlarged diameter portion, 206 second enlarged diameter portion, 207 gear member, 207a worm wheel, 207b Extension part, 208 First soft washer, 209 Second soft washer, 210 First rotating body, 210a Lid, 210b Box, 210c Storage part, 210d Side wall, 210e Inner wall, 210f Inner wall, 210g Positioning convex , 211 second rotating body, 212 pressing member, 212a inclined surface, 212b recess, 213 First thrust washer, 214 Second thrust washer, 215 Third thrust washer, 216 Fixed block, 219 Screw, 221 Fine movement shaft, 221a Chamfered portion, 222 Worm gear, 223 First convex portion, 223a Opening portion, 224 2nd convex part, 225 1st enlarged diameter part, 226 2nd enlarged diameter part, 227 gear member, 227a worm wheel, 227b extension part, 228 1st soft washer, 229 2nd flexible washer, 220 First Rotating Body, 230a Lid, 230b Box, 230c Storage, 230d Side Wall, 230e Inner Wall, 230f Inner Wall, 230g Positioning Convex, 231 Second Rotating Body, 232 Pressing Member, 232a Inclined Surface, 232b Concave 233 First thrust washer, 234 Second thrust washer Sha, 235 Third thrust washer, 236 Fixing block, 239 Screw, 301 First support shaft, 302 Second support shaft, 303 First claw portion, 304 Second claw portion

Claims (12)

A fine movement mechanism used for a theodolite,
A first rotating body having a lid connected to the first member, and a box that forms a housing together with the lid;
A fine movement shaft disposed in the first rotating body and having a first gear;
A second gear disposed in the first rotating body and engaged with the first gear; and an extending portion extending outside the first rotating body and connected to the second gear. A second rotating body connected to the second member outside the first rotating body;
A fine movement mechanism comprising: a pressing member that presses the fine movement shaft in a direction in which the first gear and the second gear are engaged by a fixing force between the lid and the box. A screw for fixing the lid and the box;
2. The fine movement mechanism according to claim 1, wherein the pressing member is in contact with the lid body, is in contact with the fine movement shaft, and includes an inclined surface on a surface that is in contact with the fine movement shaft.   The fine movement mechanism according to claim 2, wherein the pressing member has the inclined surface inclined toward the second gear. At least one of the lid or the box has a positioning projection,
The pressing member has a recess corresponding to the positioning protrusion,
The fine movement mechanism according to any one of claims 1 to 3, wherein the pressing member is positioned in the lid body or the box body by engaging the positioning convex portion and the concave portion. The first gear is a worm gear;
The fine movement mechanism according to any one of claims 1 to 4, wherein the second gear is a worm wheel.   6. The fine movement mechanism according to claim 1, wherein the pressing member is softer than the fine movement shaft and presses the fine movement shaft against the second gear by an elastic force.   The lid or box has a support wall that supports the fine movement shaft between the fine movement shaft and the second rotating body, and the fine movement shaft is fixed by the support wall and the pressing member. The fine movement mechanism according to any one of claims 1 to 6. The fine movement shaft has an enlarged diameter portion at both ends of the first gear on the shaft,
The box has a storage portion for storing the enlarged diameter portion,
The fine movement mechanism according to any one of claims 1 to 7, further comprising a soft washer outside the enlarged diameter portion and between the enlarged diameter portion and an inner wall of the storage portion.   The fine movement mechanism according to claim 8, wherein the soft washer is configured by a member softer than the fine movement shaft. When the width W2 of the enlarged diameter portion and the space width W3 of the storage portion,
The thickness W1 of the soft washer is
W1 + W2> W3
The fine movement mechanism according to claim 8 or 9, wherein the relationship is satisfied. Having at least one fine movement mechanism,
A theft table in which the fine movement mechanism is the one described in any one of claims 1 to 10. The telescope body,
A graduation platform having at least one fine movement mechanism and capable of changing the telescope body in a desired direction;
A support device connected to the graticule for supporting the telescope body and the graticule;
A telescope system in which the fine movement mechanism is the one described in any one of claims 1 to 10.

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