JPH1151653A - Lifting/lowering device for tripod of surveying instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting/lowering device for tripod of surveying instrument which can improve the operability of the surveying instrument during a surveying work and, particularly, with which the surveyor using the instrument can easily adjust the height position of the instrument and can easily sight the instrument in all directions. SOLUTION: A lifting/lowering device is provided with a fixed stationary member 5 fixed to the head 3 of a tripod 2 for surveying instrument, a liftable/ lowerable member 6 which is liftably/lowerably provided against the member 5, and a pedestal 7 which is supported in a state where the pedestal 7 can be rotated around its vertical axis by the upper end of the member 6 and couples the tripod with 2 with a surveying instrument 4. In addition, a control knob 27a is used for rotating and restricting the rotation of the pedestal 7 is protruded from the outer periphery of the pedestal 7. In addition, the lifting/ lowering device is constituted so that the member 6 can be lifted and lowered against the member 5 by means of a rack pinion mechanism and, at the same time, the member 6 is not able to be rotated relatively to the member 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tripod elevating device for a surveying instrument which improves operability including simplification of height adjustment of the surveying instrument.

[0002]

2. Description of the Related Art When performing construction, construction, interior decoration, etc. of a building, a horizontal reference line is placed on a wall surface of the building at a height of 1 m or 1.5 m from a finished floor surface for positioning. The so-called black ink which determines (horizontal black ink) is performed, and work is performed according to this reference line.
In the marking of the reference line, a reference point is determined on a predetermined wall surface, and a level (level) mounted on a tripod is collimated and matched with the reference point to obtain a horizontal reference line. Has been generalized.

[0003]

In this case, it is necessary to adjust the height of the surveying instrument so as to collimate and match the reference point with the reference point. Since it is extremely difficult to perform the adjustment with high accuracy and requires time and skill, in practice, the approximate point of the reference point is tentatively marked without strictly performing the height adjustment, and this approximate point and Ink transfer is performed each time based on the deviation from the reference point, and this is very time-consuming, so that the efficiency of the black-out operation could not be sufficiently improved.

[0004] In recent years, a laser type inking device has been introduced for inking work of a reference line. However, as described above, a laser type inking device is mounted on a tripod to determine the reference line at a required height position. In many cases, it is not possible to freely rotate in the required direction, and it is necessary to re-install the tripod when drawing the reference line on the wall in all directions, which makes the work complicated. there were.

The present invention solves such problems of the prior art and improves operability. In particular, the height position of the surveying instrument can be easily adjusted, and collimation in all directions can be easily performed. The present invention has been devised for the purpose of providing a lifting device for a tripod for a surveying instrument configured to be capable of performing such operations.

[0006]

According to the present invention, there is provided a stationary stationary member fixed to a foot of a tripod for a surveying instrument, and a lifting and lowering drive with respect to the stationary stationary member. A vertically movable member provided so as to be able to ascend and descend via means, and a pedestal supported by an upper end of the vertically movable member and connecting a surveying instrument, wherein the pedestal is rotatably provided around a vertical axis. And According to this, the pedestal can be moved up and down freely, so that the height position of the surveying instrument can be easily adjusted without performing a troublesome operation such as adjusting the height by opening the legs. Therefore, the collimation / matching operation of the surveying instrument with respect to the reference point is simplified, and the marking of the reference line can be quickly performed.

In addition, since the pedestal is rotatable about a vertical axis, even if the surveying instrument itself has a non-rotating structure, collimation and matching work in all directions can be easily performed without re-installing the tripod. It becomes possible. In this case, if a screwing means with the surveying instrument is provided at the rotation center of the pedestal, the pedestal and the surveying are performed by rotating the pedestal in a state where the screwing means of the surveying instrument corresponding to the screwing means are aligned with each other. The two screwing means of the instrument can be screwed together, and the mounting operation of the surveying instrument becomes easy.

In addition to the above, there is provided means for restraining the rotation of the pedestal, and an operation knob of the pedestal rotation restraining means is protruded to the outer peripheral side of the pedestal so that the rotation of the pedestal can also be performed. Good to be. According to this, the operation knob can be easily gripped and the rotation operation and the rotation restriction operation can be performed continuously, so that the operability can be improved.
The above-mentioned pedestal rotation restraining means is most simple in a fastening mechanism using a screw member.

[0009] Further, a rack is engraved on the vertically movable member in order to move the vertically movable member up and down with respect to the fixed stationary member, and a pinion meshed with the rack is rotatably operated by a manual operation handle. On the other hand, a lead groove is formed in the vertically movable member so that the vertically movable member cannot be relatively rotated with respect to the stationary stationary member, and a lead piece engaged with the lead groove is provided on the stationary member. Preferably, it is provided on a stationary stationary member. According to this, it is possible to smoothly raise and lower the vertically movable member with a simple structure, and it is possible to further improve operability.

[0010] In order to removably fix the fixed stationary member to the leg head, it is preferable to provide a pair of leg head holding members for holding the periphery of the center hole of the leg head from above and below.
A common tripod for a surveying instrument has a center hole through which a down swing for aligning the surveying instrument with a side point on the ground is inserted, and the periphery of this center hole is paired with a pair of leg head holding members. Since the fixed stationary member can be detachably fixed to the leg head by being sandwiched, the lifting device can be mounted on an arbitrary tripod, and convenience is improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a situation in which a lifting device according to the present invention is applied to a tripod for a surveying instrument. This lifting device 1
It is attached to the leg 3 of the tripod 2 and supports a surveying instrument 4 such as a laser-type marking device so as to be able to move up and down. The mounting section 5 as a fixed stationary member fixed to the upper surface of the leg 3 is provided. An elevating cylinder 6 as an elevating movable member held at the center of the mounting part 5 so as to be able to elevate and lower, and a disk-shaped pedestal 7 provided with an surveying instrument 4 provided at an upper end of the elevating cylinder 6. ing.

As shown in FIG. 2, the mounting portion 5 has a guide tube 10 for holding the elevating tube 6 inserted therein so as to be movable in the axial direction, and for fixing the guide tube 10 to the leg 3. It comprises a flange plate 11 and a gear box 13 in which gears for converting the rotation operation of the crank handle 12 into the vertical movement of the elevating cylinder 6 are incorporated. Flange plate 1
1 is caulked to the lower end of the guide cylinder 10, and the gear box 13 is fixed to the side surface of the guide cylinder 10 by screwing. The flange plate 11 is fixed to the leg 3 with a holding bolt 14. The lower part of the lifting cylinder 6 is inserted through the center hole 3a of the leg 3 and protrudes from the lower surface thereof.

On the lower surface of the pedestal 7, an annular boss 15 having a centered circular hole 15a for receiving the upper end of the elevating cylinder 6 tightly and relatively rotatably is protruded. A bush 1 is provided in the circular hole 15a of the boss 15 for engaging with an enlarged diameter portion 6a provided at the upper end of the elevating cylinder 6 to prevent it from coming off.
6 is screwed. On the other hand, a joint 17 having a male screw 17a threaded at the top is embedded in the center of the upper surface of the pedestal 7, and a female screw 4a provided on the bottom surface of the surveying instrument 4 shown in FIG. Together, they are interconnected.

A rack 18 is engraved on the outer peripheral surface of the elevating cylinder 6 in the axial direction, and a pinion 19 built in the gear box 13 meshes with the rack 18. The pinion 19 meshes with a worm 21 that is rotated via a worm shaft 20 connected to the crank handle 12, and by rotating the crank handle 12, the lifting cylinder 6 is relatively displaced in the axial direction. The height position of the pedestal 7 can be adjusted simply, smoothly and accurately.

On the side of the elevating cylinder 6 opposite to the rack 18,
In order to regulate the relative rotation of the elevating cylinder 6 with respect to the guide cylinder 10, a lead groove 24 in which a lead piece 23 bolted to the guide cylinder 10 is engaged is formed over substantially the entire length in the axial direction.

As shown in FIG. 3, on the lower surface side of the pedestal 7,
A fixing screw 27 with a knob as a pedestal rotation restricting means is screwed in a state in which the operation knob 27a is protruded to the outer peripheral side, and by tightening the screw, the tip of the push rod 28 interposed therebetween expands the elevating cylinder 6. The relative rotation of the pedestal 7 with respect to the elevating cylinder 6 can be restricted by being pressed against the diameter portion 6a. Further, a fixed screw 26 with a knob is screwed onto the guide cylinder 10, and by tightening the screw, a displacement of the elevating cylinder 6 with respect to the guide cylinder 10 in the axial direction can be restricted.

On the outer peripheral side of the pedestal 7, a circular bubble tube 29 for confirming the level of the pedestal 7 is embedded so as to be visible from the upper surface side of the pedestal 7.

In order to perform the marking operation of the reference line using the lifting device 1 having the above-described configuration, first, as shown in FIG. 1, the three legs 31 of the tripod to which the lifting device 1 is attached are attached. The surveying instrument 4 is mounted and fixed on the pedestal 7 by opening the legs.
By opening the three legs 31 until the chain 32 interconnecting the three legs 31 is tensioned, the surveying instrument 4 is approximately 1 m long.
The position of the surveying instrument 4 is approximately 1.5
It is arranged at a height of m. If the three legs 31 are connected to each other via the chain 32 in this manner, the leg 31 is opened due to the momentum of accidentally hooking an object on the leg 31 and the entire tripod falls. It also has the effect of preventing.

Next, the pedestal 7 is viewed while looking at the circular bubble tube 29.
After finely adjusting the horizontality of, the surveying instrument 4 is fixed to the pedestal 7. At this time, the male screw 17a of the joint 17 of the pedestal 7
With the female screw 4a provided on the bottom surface of the surveying instrument 4 aligned with the operating knob 27 of the fixing screw 27 with the knob
By rotating the pedestal 7 in a required direction using a as appropriate, the male screw 17a of the joint 17 and the female screw 4a of the surveying instrument 4 can be screwed together.
Can be connected and fixed to the pedestal 7.

The crank handle 1 of the lifting device 1
2, the height of the surveying instrument 4 is adjusted, and as shown in FIG. 4, the surveying instrument 4 is collimated and matched with a reference point 34 marked on the wall surface. Perform ink summit.
At this time, if the surveying instrument 4 is a laser-based inking device, a horizontal line due to the laser light appears on the wall surface, and the inking device may be moved up and down so that this horizontal line passes through the reference point 34.

In this manner, the collimation of the reference point 34
When the matching operation is completed, the fixing screw 26 with the knob is tightened to fix the elevating cylinder 6 and the fixing screw 2 with the knob.
After fixing the pedestal 7 by tightening the 7, the sanitizing operation is performed according to the reference point 34. For wall surfaces where collimation is impossible or laser light does not reach because the surveying instrument 4 cannot rotate, the pedestal 7 is rotated in a required direction after the fixing screw 27 with the knob is loosened. If this is the case, the surveying machine 4 can be made to face the wall surface to continuously perform ink mark-out.

FIG. 5 shows an example in which the elevating device 1 is partially modified. In the elevating device 1 described above, the flange plate 11 of the mounting portion 5 is fixed to the leg 3 by bolting, but here, the opening peripheral portion of the center hole 3a of the leg 3 is used. A pair of upper and lower flange plates 4
It is configured to be fixed to the leg 3 by being sandwiched between the legs 1 and 42. The upper flange plate 41 is locked to the guide tube 10 in such a manner as to restrict upward displacement, and the lower flange plate 42 is screwed into the guide tube 10 to form the center hole 3a.
Of the opening is tightened. A set screw 43 for restricting relative rotation between the flange plate 41 and the leg 3 is screwed to the upper flange plate 41.

In the above-described embodiment, the description has been given of the blackout on the wall surface of the building. However, the elevation device of the tripod for a surveying instrument according to the present invention is not limited to such an application. When used for measuring the gradient of a water pipe, it is effective in simplifying and speeding up collimation and matching with respect to the pipe center line.

[0025]

As described above, according to the present invention, since the pedestal can be raised and lowered freely, the height position of the surveying instrument can be easily adjusted without performing a troublesome operation such as adjusting the height by opening the legs. It will be adjustable. Therefore, the collimation / coincidence work of the surveying instrument with respect to the reference point is simplified, and there is an extremely remarkable effect in speeding up the work. In addition, since the pedestal is rotatable, even if the surveying instrument itself has a non-rotating structure, it is possible to easily perform collimating and matching work in all directions without re-installing the tripod. In this case, by providing a screwing means with the surveying instrument at the center of rotation of the pedestal, the pedestal and the surveying instrument can be screwed together by the rotation operation of the pedestal and connected and fixed to each other. Operation becomes easy.

In addition to this, if the operation knob which is used for both the rotation operation and the rotation restriction operation of the pedestal is projected on the outer peripheral side of the pedestal, the operation knob can be easily gripped and the rotation operation and the rotation restriction operation can be performed continuously. Operability can be improved.

Further, when the vertically movable member is raised and lowered with respect to the fixed stationary member by the rack and pinion mechanism, and the vertically movable member cannot be rotated relative to the fixed stationary member, the vertically movable member can be smoothly moved with a simple structure. Since it is possible to move up and down, work can be performed more quickly, and operability can be further improved.

In addition, if the peripheral portion of the center hole of the leg is clamped by a pair of leg clamps so that the fixed stationary member can be detachably fixed to the leg, it can be mounted on any tripod. This lifting device can be mounted, and convenience is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a situation in which a lifting device according to the present invention is applied to a tripod for a surveying instrument.

FIG. 2 is a cross-sectional view showing the elevating device shown in FIG. 1 cut along a vertical plane including a center line.

FIG. 3 is a cross-sectional view showing the elevating device shown in FIG. 1 cut along a plane orthogonal to the vertical fractured surface in FIG. 2;

FIG. 4 is a perspective view showing a situation in which a surveying instrument is mounted on the elevating device shown in FIG. 1 to perform a marking operation of a reference line.

FIG. 5 is a sectional view similar to FIG. 2, showing a modification of the lifting device according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lifting device 2 tripod 3 foot 4 surveying instrument 5 mounting part 6 lifting cylinder 7 pedestal 10 guide cylinder 11 flange plate 12 crank handle 13 gear box 14 holding bolt 15 boss 16 bush 17 joint 18 rack 19 pinion 20 worm shaft 21 worm 23 Lead piece 24 Lead groove 26/27 Fixing screw with knob, 27a Operation knob 28 Push rod 29 Circular bubble tube 31 Leg 32 Chain 34 Reference point 35 Reference line 41/42 Flange plate 43 Set screw

Claims (4)

[Claims] 1. A fixed stationary member fixed to a leg of a tripod for a surveying instrument, a movable member movable up and down with respect to the fixed stationary member, and supported on an upper end of the movable movable member. And a pedestal for connecting the surveying instrument, and the pedestal is provided rotatably about a vertical axis. 2. The apparatus according to claim 1, further comprising means for restraining rotation of the pedestal, and an operation knob of the pedestal rotation restraining means protruding from an outer peripheral side of the pedestal so as to be able to rotate the pedestal. The tripod lifting device for a surveying instrument according to claim 1. 3. A rack is engraved on the vertically movable member so that the vertically movable member can be moved up and down with respect to the fixed stationary member, and a pinion engaged with the rack can be rotated by a manual operation handle. A lead piece is provided in the stationary stationary member, and a lead groove is formed in the movable movable member so as to be incapable of rotating the movable movable member relative to the stationary stationary member. 3. The apparatus according to claim 1, further comprising a stationary member provided on the fixed stationary member. 4. 4. A pair of leg head holding members for holding the peripheral portion of the center hole of the leg head from above and below in order to removably fix the fixed stationary member to the leg head. A tripod lifting device for a surveying instrument according to any one of claims 1 to 3.