JPH0249536Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a surveying tripod, and more particularly to a surveying tripod that allows easy positioning of a transit or level device.

As is well known, when surveying is carried out using a transit or a level, the base of the transit or level is fixed to the top of the leg of a surveying tripod. The above-mentioned surveying tripod is generally constructed by having three telescopic legs attached to the lower side of the leg head so as to be openable and closable.

When starting a survey, a pole called a leveling rod is erected on the flagstone that serves as the reference for the survey, and a transit or level device is set on the ground using the pole as a reference. What should be considered in the above installation is that the transit or level device should be installed horizontally at a predetermined height.

Of course, there is a mechanism installed in the transit or leveler body to adjust the height and level, but the mechanism installed in the transit is an adjustment mechanism for precise final finishing, and as a general rule, It is desirable to adjust the tripod to place the base of the transit or level at a predetermined height and level. In this way, the height adjustment and horizontal adjustment for installing the transit or level device at a predetermined height and horizontally are performed by extending and contracting the length of the legs and opening and closing the legs. That is, the height is generally adjusted by adjusting the length of the legs to a predetermined length, and the leveling is generally adjusted by opening and closing each leg depending on the topography of the ground on which each leg is installed. When adjusting height and horizontality in this way,
For example, when you try to adjust the height, the horizontal changes,
When adjusting the level, the height tends to change, so it is necessary to alternately adjust the height and level many times. It takes time and effort to do so. After taking the time and effort to install the transit or level device, set up a pole at the surveyed area, compare this pole with the leveling rod set at the above reference point using the transit or level device, and determine the elevation of the surveyed area. Measure angles and angles. Since surveying is carried out in this manner, it is desirable to keep the above-mentioned transits or levelers installed in the same manner from the beginning of one survey until the entire surveying at that location is completed. This is because if the installation mode of the transit or level device deviates from the previous installation mode, there will be a discrepancy between the previous survey data and the next survey data, and the This is because unless it is corrected, it will no longer be possible to treat it uniformly.

Therefore, when resuming surveying, it is desirable to adjust the tripod and install the transit or level device in the same manner as before, but this installation work is extremely time-consuming and time-consuming. This is because when storing the tripod, each leg is retracted and closed.

Therefore, when resuming the survey, each leg must be extended to the same length as before, and each leg must be opened by the same angle as before.

However, in the case of a conventional tripod, there are no markings for adjusting the length or the degree of opening of the legs, so you have to fumble around to set it up in the same way as before.

The present invention was developed in view of the above points, and its gist is that three legs consisting of a slide guide and a slider are arranged so as to be openable and closable, and the base of a transit or level device is attached to the legs. In a surveying tripod that is fixed to the head and used to stand a transit or a level on the ground, it is possible to read the length that the slider extends from the slide guide for each of the above sliders. In addition to marking the length scale, the upper end of each slider is attached to the underside of the support base so that it can be opened and closed, and an opening reading mechanism is installed at these attachment points to indicate the opening degree of each leg. This is a surveying tripod with the head of the leg movable up and down by rotating the dial on the support base. To provide a surveying tripod that can be quickly installed and thereby improve surveying work efficiency.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates a tripod body, and three telescopic legs 4 consisting of a slide guide 2 and a slider 3 are attached so as to be openable and closable, and a base 6 of a transit or level device 5 is fastened to the top. A leg head 8 is installed for fixing using a bolt 7.

The above shows a generally standard configuration of a surveying tripod, and the present invention is a tripod configured as described above, which is modified as follows.

That is, first, the length scale 9 is marked on the slider 3. The length scale 9 is used to read the length of the slider 3 extending from the slider guide 2, and makes it easy to extend the slider 3 from the slide guide 2 by a predetermined length. Make it. The slider 3 extended in this manner is held in its position by the fixing screw 2b provided at the lower end of the slider 2.

Next, the upper end 2a of the slide guide 2 is attached so as to be openable and closable to the lower side of a support stand 10 provided to support the leg head 8 in a vertically movable manner. The above attachment is carried out by vertically disposing a bracket 11 below the support base 10, and engaging the bracket 11 with the upper end of the slide guide 2 via wing bolts 12. A pointer 13a is provided protruding from this bracket 11, and an angle scale 13b is marked on the upper end 2a of the slide guide to form an opening degree reading mechanism 13. The opening degree reading mechanism 13 is arranged to read the opening degree of the leg 4, and facilitates opening the leg 4 to a predetermined angle, and rotates the butterfly bolt 12 when the leg 4 is opened by a predetermined angle. and fix it.

Next, the vertical movement mechanism 15 of the leg head 8 will be explained. The vertical movement mechanism 14 is arranged so that the height of the leg head 8 can be changed without moving the legs 4, 4, 4. Although various structures can be considered for the vertical movement mechanism 10, the following example is shown in this embodiment. That is, the bearings 15, 15 are placed under the support base 10.
Place. The shaft 16 is rotatably supported by the bearings 15, 15. A pinion gear 17 is then fixed onto the shaft 16 located directly below the center of the support base 10. On the other hand, a bracket 18 is arranged at the center of the leg head 8, and the bracket 1
A rack 19 is vertically provided below the gear 8, and the rack 19 and the pinion gear 17 are engaged with each other. As a result, when the shaft 16 is rotated by rotating the dial 20 fixed to the end of the shaft 16, the leg head 8
can be moved up and down with respect to the support stand 10. In order to perform the above-mentioned vertical movement, guide rods 21, 21 are provided vertically below the leg head 8, and guide holes 22, 22 of the support base 10 are formed. The guide rods 21, 21 are inserted through the holes. This allows the leg head 8 to move up and down perpendicularly to the support base 10.

Next, the operation will be explained based on the above embodiment.

Since the surveying tripod of the present invention is constructed as described above, the transit or level device 5 can be easily installed. That is, when using the transit or level device 5 installed on the ground 23,
First, the base 6 is fixed onto the leg head 8. The above fixing is performed by screwing the tightening bolt 7 into a screw hole (not shown) formed in the base 6. After fixing the transit or level device 5 on the leg head 8 in this way, the transit or level device is installed on the ground. Stand upright and watch the scale on this staff as you do it. For this reason, it is desirable to install the transit or level on the leveling rod at a well-defined height relative to the scale, for example, at a height of 1 m or 1.5 m. This is because when reading the height of the surveyed area, this read value and the reference point 2
Since the height of the surveyed area is determined by comparing the value on the leveling rod 25 set up on the ground, it is easier to calculate the value on the leveling rod 25, which is the basis of the calculation, if it is a well-separated value. This is because there are fewer mistakes.

In order to install the transit or the level at a predetermined height in this way, it is necessary to adjust the length of the legs 4. The length of the leg 4 is adjusted by moving the slider 3 forward and backward from the slide guide 2. After adjusting the legs 4 to a predetermined height in this manner, the transit or leveler 5 is made horizontal. The above-mentioned horizontal adjustment is performed by adjusting the opening degree of each leg 4. When adjusting this level, the height may change.

In the case of conventional tripods, it was necessary to change the length of the legs 4 in order to adjust the height that changed during leveling. When the length of the legs is changed in this way, the level may change, and it is necessary to repeat the level and height adjustments many times.

However, in the case of the tripod of the present invention, precise height adjustment after it is installed horizontally at the height of the main body is performed using the vertical movement mechanism 1.
4, the installation work of the transit or level device can be easily carried out. After installation in this manner, final fine adjustments are made using the horizontal adjustment mechanism and height adjustment mechanism provided on the transit or leveler 5.

After surveying is started as described above, it may be necessary to stop the surveying, for example, due to sunset, before all the surveying at that point is completed. In such a case, the installation work described above had to be restarted from the beginning the next time the survey was started. This re-installation work is very time-consuming and time-consuming because unless the transit or level device is installed in the same manner as the previous one, the data from the previous survey and the data from the next survey cannot be handled in the same way. It took a while. However, in the case of the tripod of the present invention, the length scale 9 and the angle scale 13b are marked, so if you read these values, you can set up the transit or level gauge in the same manner as the previous time when you install it next time. Easy to install. That is,
While extending the slider 3 of each leg 4 to the slide guide 2 by the same length as the previous time,
The tripod of the present invention can be installed in the same manner by opening each leg by the same opening degree as the previous one, but the tripod of the present invention is marked with a length scale 9 and an opening scale 13a, making this task easier. It can be carried out.

In this embodiment, an example was shown in which the vertical movement mechanism 14 was formed by combining the rack 19 and the pinion gear 17, but as shown in FIG. 27 and a threaded rod 28 may be combined.

As detailed above, the present invention has three legs consisting of a slide guide and a slider that can be opened and closed, and the base of the transit or level device is fixed to the leg head, so that the transit or level device can be placed on the ground. On a surveying tripod for standing, a length scale is provided on each of the sliders 3, 3, 3 so that the length of the slider extended from the slide guides 2, 2, 2 can be read. 9
along with the upper end 2 of each slider.
A is attached to the lower side of the support stand 10 so that it can be opened and closed,
An opening degree reading mechanism 13 for indicating the opening degree of each leg 4 is disposed in these attachment parts, and furthermore, the leg head 8 is disposed so as to be movable up and down with respect to the support base 10 by rotating the dial. Since it is a surveying tripod made by
Since it is arranged on the support stand 10 so that it can move up and down, it is easy to install the transit or level device horizontally at a predetermined height.Especially when restarting a survey after suspending it, each By reading the length data and opening degree data of the leg 4 on the length scale 9 and opening degree scale 13b, the transit or level device can be quickly installed in the same installation mode as before the interruption when surveying is restarted. This has various advantages, such as providing a surveying tripod that can improve surveying work efficiency.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention; FIG. 1 is a perspective view, FIG. 2 is a sectional view of the vertical movement mechanism, FIG. 3 is a perspective view of the transit, and FIG. 4 is a side view showing the state of use. FIG. 5 is a sectional view showing a modification of the vertical movement mechanism. In addition, in the figure 1...Main body, 2...Slide guide, 2
a...Top end, 3...Slider, 4...Legs, 5
...Transit or level device, 6...Base,
8... Leg head, 9... Length scale, 10... Support stand,
13...opening degree reading mechanism, 14...vertical movement mechanism.

Claims (1)

[Scope of utility model registration request] Three legs consisting of a slide guide and a slider are arranged so that they can be opened and closed, and the base of the transit or level device is fixed to the leg head, making it a surveying tripod for standing the transit or level device on the ground. and each slider 3, 3,
3, the slider is in slide guide 2, 2, 2
A length scale 9 is marked so that the length extended from the slider can be read, and the upper end 2b of each slider is attached to the lower side of the support base 10 so that it can be opened and closed. An opening degree reading mechanism 13 for indicating the opening degree of each leg 4 is disposed at the attachment part, and furthermore, the leg head 8 is disposed so as to be movable up and down with respect to the support base 10 by rotating a dial. A surveying tripod characterized by its construction.