JPH041449Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to an automatic compensation device used in surveying instruments.

(Background of the invention) As a conventionally known technique, for example,
There is number 135309.

In other words, the automatic compensation device in surveying instruments is
A compensating reflective surface is formed in the observation optical system that always faces horizontally regardless of the tilt of the device body, and by passing the optical path through this reflective surface, the slight tilt of the device body can be automatically compensated for optically. The observation point can be observed without being affected by the slight tilt of the device itself. The compensating reflective surface as described above is formed by a reflecting prism or the like, and a frame holding the compensating reflective surface is suspended by four hanging strings or the like.

At this time, a swing range regulating device is provided for regulating the swing range of the frame so that the frame does not swing too much as described above and the hanging cord is cut. That is, the swing range regulating device is, for example,
Metal protrusions placed on both sides of the frame in the swinging direction,
It consists of a pair of metal stoppers fixed to the main body of the surveying instrument on both sides of the protrusion, and when the protrusion collides with the stoppers, the swinging of the frame is restricted. .

However, with such a swing range regulating device,
It often happens that the protrusion remains in contact with the stopper and becomes stuck to it and cannot be separated from it.
There are those that are equipped with a vibrating device that applies forced vibrations to the frame before observation, those that use saphire, etc. as a stopper, and those that use a vibration device that applies forced vibration to the frame before observation. There are some in which both or one of the child and the stopper are made of a non-metallic material that does not easily absorb moisture on the surface.

However, devices with a vibration device have the disadvantage that the device is complex and the operation to apply forced vibration every time a measurement is troublesome, and devices using sapphire or non-metallic materials cannot completely eliminate the above-mentioned adhesion. There was a drawback.

(Purpose of the invention) The object of the present invention is to solve these drawbacks and provide an automatic compensation device for a surveying instrument that has a simple structure and prevents the swing range regulating device from adhering.

(Summary of the invention) The present invention is an automatic compensation device for a surveying instrument, which forms a pendulum by suspending an adaptive optical member from the device body, and is provided with a swing range regulating device for limiting the swing range of the pendulum. a pair of limiting spring members 5a and 5b that are disposed at a predetermined distance from the pendulum across the pendulum in the swinging direction of the pendulum, and that are deformed in the swinging direction of the pendulum; The automatic compensation device is characterized in that the swing range regulating device is constituted by blocking members 8a and 8b that prevent the pendulum from moving when the limiting spring member is deformed by a predetermined amount.

(Example) Figure 1 is a top view showing an example of the present invention (however, the magnetic damper is omitted),
The figure is a view in the direction of arrow A in FIG. 1, and FIG. 3 is a view in the direction of arrow B in FIG. 1, showing the swing range regulating device.

The frame body 1 has hanging strings (ribbons) 2a, 2b, 2
The frame 1 is suspended from the telescope body by means 1 and 2d to form a pendulum, and a reflection prism 3 having a compensating reflection surface disposed in the optical path of the telescope is fixed to the frame 1. The frame 1 swings in the left-right direction P in FIG. 1, and a pair of swing range regulating devices are provided opposite to each other on both sides of the frame 1 in the swing direction. The swing range regulating device bodies 4a, 4b are fixed to the telescope body (not shown), and one ends of the leaf spring members 5a, 5b, which are bent into a substantially U-shape, are further slightly bent to form contact portions 50a, 50b. Then, fix the other end with screws 6a and 6b so that this contact portion faces the side surface of the frame 1 with a predetermined interval.
The main body 4 is located on the opposite side (back side) of the frame 1.
It is fixed at a and 4b. In order to adjust the distance between the abutting parts 50a, 50b of the spring members 5a, 5b and the frame 1, the abutting parts 5 are removed from the back side of the main bodies 4a, 4b.
Limiting spring adjusting screws 7a, 7b for moving the springs a, 5b in the swinging direction P are provided so as to abut against the leaf spring members 5a, 5b and move back and forth in the swinging direction P. Further, in the main bodies 4a and 4b, when the frame 1 moves to the left (or right) in FIG. 1, the leaf spring member 5a or 5b comes into contact with the frame 1 and deforms to the left or right. Then, tighten the steady rest screw 8a (or 8b) so that the frame 1 comes into contact with it.
is provided so as to be able to move forward and backward in the swinging direction P of the frame 1. The same applies when the frame body 1 moves to the right as described above. Of course, set screw 8
a, 8b are not in direct contact with the frame 1, but are connected to the spring member 5.
It may be made to abut against the frame 1 via a and 5b.

As is clear from FIG. 2, a magnetic damper (not shown) is formed between the telescope main body and the frame 1 in order to quickly stop the swinging of the frame 1. That is, the swing range regulating device bodies 4a, 4b are provided with magnets 9a, 10a, 9b, 10b, respectively, to form a magnetic gap.
A copper plate 11a integral with the frame 1 is provided in the magnetic gap formed by the magnets 9a and 10a.
However, a copper plate 11b integral with the frame 1 is inserted into the magnetic gap formed by the magnets 9b and 10b.

Because of this structure, if the frame 1 swings too far to the left in FIG. 1, it will come into contact with the leaf spring member 5a,
The leaf spring member 5a is pushed to the left, but the frame body 1 is about to be pushed back to the right by the rightward restoring force of the leaf spring member 5a, and in this state, the frame body 1
When the leaf spring member 5a moves to the right, the leaf spring member 5a returns to the neutral position. Even if the contact portion 50a and the frame body 1 are attracted to each other, when the leaf spring member 5a moves to the right beyond the neutral position, a restoring force is generated in the leaf spring member 5a to the left. The restoring force ensures that the contact portion 5a is removed from the frame 1.

Moreover, even if the frame body 1 swings greatly, the leaf spring member 5
Since a escapes, no excessive force is applied to the abutting portion 50a, and the tip will not be deformed.

When the frame body 1 swings greatly, the frame body 1 deforms the leaf spring members 5a, 5b, and then deforms the steady rest screws 8a,
8b. However, the frame body 1 has magnetic dampers 9a, 10a, 11a, 9b, 1
0b, 11b and the leaf spring members 5a, 5b, the frame body 1 is slowed down by the collision.
The impact generated on the plate spring members 5a, 5 is small, and
The restoring force of b acts to quickly return the frame 1.

Such an automatic compensation device is arranged in the optical system of the telescope as shown in FIG.

In FIG. 4, a lens barrel (telescope body) 40 is provided with an objective lens 41, and a focusing lens 42 is provided movably in the optical axis direction for focusing.
A target object is imaged onto a focusing plate 43 through a prism 3 having a compensating reflection surface by an objective lens 41 and a focusing lens 42 . The prism 3 is arranged in the frame 1 shown in FIGS. 1 and 2, but in FIG. It is shown as if it were suspended directly by the. The target object image on the focus plate 43 is observed through the eyepiece lens 46.
As is well known, since the correction reflecting surface 3a of the prism 3 always faces horizontally, the position of the optical axis on the focus plate 43 will not shift even if the telescope main body 40 is tilted.

(Effects of the invention) As described above, according to the invention, not only the swing range regulating device is prevented from being attracted with a simple structure, but also a pendulum damping effect is produced due to the deformation of the limiting spring member that contacts the pendulum. It turns out.

[Brief explanation of the drawing]

Figure 1 is a top view showing one embodiment of the present invention (however, the magnetic damper is omitted);
The figure is a view in the direction of arrow A in Figure 1, Figure 3 is a view showing the swing range regulating device in the direction of arrow B in Figure 1, and Figure 4 is a view of a telescope showing an example of an optical system having an automatic compensation device. FIG. Explanation of symbols of main parts, 1... Frame, 2a, 2
b, 2c, 2d... Hanging string, 3... Reflective prism, 3a... Correction reflective surface, 5a, 5b... Leaf spring member, 50a, 50b... Contact portion, 8a, 8b...
... Steady rest screw.

Claims (1)

[Scope of Claim for Utility Model Registration] In an automatic compensation device for a surveying instrument, which forms a pendulum by suspending an adaptive optical member from the device body, and is provided with a swing range regulating device for limiting the swing range of the pendulum. a pair of limiting spring members that are disposed at a predetermined distance from the pendulum across the pendulum in the swinging direction of the pendulum, and that are deformed in the swinging direction of the pendulum; An automatic compensation device characterized in that the swing range regulating device includes a blocking member that blocks movement of the pendulum when the pendulum is deformed by a predetermined amount.