CN1884971A - Middle straight position indicator - Google Patents

Abstract

The invention discloses a middle position finder, which comprises a wire tying part and a swinging part, wherein the wire tying part comprises a swinging shaft for mounting the swinging part and a wire tying device for tying a measuring wire, and the positions of the swinging shaft and the wire tying device are fixed with each other; the swinging part is provided with a through hole, the through hole is arranged on the swinging shaft, the swinging part can hang down around the swinging shaft and can swing freely, an upper reference point and a lower indicating point are arranged on the swinging part, the reference point and the indicating point are positioned on a gravity line of the swinging part through the center of the swinging shaft, when the lower end of a measuring line is fixed and the upper end of the measuring line is tied to a line tying device, as long as the measuring line passes through the upper reference point and the lower indicating point in all directions of the same level of the middle straight positioning instrument in a straightening state, a straight line vertical to the ground can be determined.

Description

Center Straight Locator

technical field

The invention relates to a measuring instrument used in building construction engineering, in particular to a centering locator for determining vertical lines.

Background technique

In building construction and decoration projects, it is necessary to delineate the vertical and horizontal "cross" lines as the reference line for construction, so that the height direction of the building after completion is perpendicular to the ground and the horizontal direction is parallel to the ground and the position of each component is accurate. correct.

The most commonly used instrument is the plumb bob. A conical plumb bob has a thin line tied to the center of the upper surface, with the conical point pointing downward. The construction worker pulls the other end of the thin wire, releases the plumb weight and allows it to hang down freely to straighten the thin wire. At this time, the thin wire is on the line of action of the gravity of the plumb weight. When the plumb weight is at rest, the thin wire is form a straight line perpendicular to the ground. In Chinese patent application 92208434.3, Chinese patent ZL98205019.4, British patent application GB2277801A and Japanese patent application Japanese patent application No. 5-67301 disclose various types of plumb gauges, but their principles are the same as plumb weights, and all have such The plumb device.

The problem in the prior art is that the determination of the vertical line is carried out from top to bottom, that is, the base point of the vertical baseline is on the construction surface, and with the continuous increase of the floor, the vertical line must be measured in sections, that is, the base point It is constantly changing and rising, so the possible problem is that although each floor is perpendicular to the ground, due to the difference in base points, it is inevitable that there will be a small lateral displacement between the floors, which will affect the construction quality.

Contents of the invention

The purpose of the present invention is to solve the problems in the above-mentioned prior art, and provide a centerline locator with the base point of vertical measurement at the bottom, so that a fixed vertical reference line can be realized in construction engineering, and lateral displacement between floors can be avoided.

In order to achieve the above object, the center straight locator provided by the present invention includes a tether part and a swing part, wherein the tether part includes a swing shaft for installing the swing part and a tether device for tying the measuring line, the swing shaft and the tether The positions of the line devices are mutually fixed; the swing part has a through hole, which is installed on the swing shaft through the through hole, and can hang down around the swing shaft and swing freely. The above-mentioned reference point and indicator point are located on the gravity line of the swing part through the center of the swing shaft. When the lower end of the measuring line is fixed and the upper end is tied to the tethering device, as long as the measuring line is at the same level as the center straight locator in the straightened state If all the directions pass through the upper reference point and the lower indication point, then a straight line perpendicular to the ground can be determined.

Description of drawings

The present invention will be described in detail below with reference to the accompanying drawings, wherein:

Fig. 1 is the front view of an embodiment of straight locator among the present invention;

Fig. 2 is the left side view of the straight locator shown in Fig. 1;

Fig. 3 is a top view of the straight locator shown in Fig. 1;

Fig. 4 is a part diagram of the swing part shown in Fig. 1;

Fig. 5 is a side view part diagram of the shield shown in Fig. 1;

Fig. 6 is the schematic diagram of a preferred embodiment when straight locator is used for measuring angle in the present invention;

Fig. 7 is a schematic diagram of another preferred embodiment of the present invention when the straight locator is used to measure angles.

Detailed ways

Fig. 1 shows an embodiment of the straight locator in the present invention. The center straight locator 10 includes a tether part 1 and a swing part 2 . The tethering part 1 includes a swing shaft 3 and a tethering device 4. In the embodiment shown in the figure, the tethering device 4 is a tethering shaft. A handle hole 12 passing through the handle cord 11 may be provided on the tether part 1 . Other accompanying drawings do not show handle cord. Of course, other structures can also be provided to form handles for easy grasping. The swing part 2 is generally fan-shaped, and has a through hole 5 with a diameter slightly larger than that of the swing shaft 3 at the upper end. The swing part 2 is suspended on the swing shaft 3 through the through hole 5 , so that the swing part 2 can freely swing around the swing shaft 3 . An upper reference point C and a lower indicating point B are set on the swing part 2, and both B and C are located on the gravity line of the center A of the swing part through the through hole 5. The lower end of the measurement line L is fixed on the ground as the measurement base point. This is completely different from the situation where the base point is above in the existing traditional method. The upper end of the measuring line L is tied to the tie-line device 4 of the center straight locator 10, and the handle soft rope 11 of the tie-line part 1 is held by hand, so that the swing part 2 hangs down freely. Adjust the tether part 1 so that the measuring line L coincides with the gravity line passing through the vertical reference point C and the lower indicating point B in front and rear positions (what the observer sees is "measurement line L passes through points B and C") , then keep the positions of the tether point and the measuring line L unchanged, and rotate an angle (but not 180° or 360°) with the tether point as the axis. and the gravity line of the lower point B are coincident in front and rear positions, then the measurement line L constitutes a vertical line relative to the ground. If the positioning line L does not pass through points B and C, adjust the positioning line L so that it passes through points B and C, then keep the position of the tether point and the measurement line L unchanged, and rotate an angle with the tether point as the axis (but not 180° or 360°), repeat the above steps until the positioning line L passes through points B and C no matter how the centerline locator turns to any angle, and the upper end of the measuring line L is fixed while the lower end is still fixed on the The original measurement base point constitutes a vertical reference line for building construction. As the building continues to rise, the upper end of the measurement line L also moves up, and the vertical reference line is always on a straight line, thus avoiding the possible gap between floors caused by the change of the vertical line in the traditional method. There is a problem of lateral misalignment.

In order to ensure that the measuring line L is not damaged during use, a sheath can be installed outside the measuring line.

In one embodiment of the present invention, a shield for covering the swing shaft and the upper end of the swing part is also installed on the tethering part, as shown by number 9 in the accompanying drawings. Figure 5 shows a detail view of the shroud. The shield 9 may include two parts, the front and the rear, which are connected at the upper end and are parallel to each other and spaced apart. The upper end of shield 9 is fixed on the line part 1 by pin. As can be seen from FIG. 2 , there is a corresponding recess on the tether portion 1 to accommodate the shield 9 . Holes are formed at corresponding positions of the front and rear portions of the shield 9 through which the swing shaft 3 is mounted on the tether portion 1 . The upper part of the swing part 2 is mounted on the swing shaft 3 between the front and rear parts of the shield 9 .

The centerline locator of the present invention may also include a protractor. As shown in Figure 6, in a preferred embodiment of the present invention, the protractor 7 is formed on the fan-shaped lower part of the swing part 2, the above reference point C is the center of the circle, and the fan-shaped lower part of the swing part is engraved with a scale representing the deflection angle. At this time, it is required that the tethering point of the measuring line L on the tethering device coincides with the center of circle of the protractor (that is, the upper reference point C) in front and rear positions. When it is necessary to form a slanted line at a certain angle relative to the vertical direction, the hand-held tether part is translated to ensure that the position of the tether point and point C always coincide. When the measurement line L passes through the scale indicated by the protractor and reaches a predetermined angle, the measurement line L at this time is inclined by a predetermined angle relative to the vertical direction.

In other preferred solutions, the protractor can also be formed on the tether part 1 . In the preferred embodiment shown in Fig. 7, the protractor 7' is formed on the front portion of the shield 9 with the center of the swing shaft 3 as the center of the protractor 7'. At this time, it is required that the free swing part 2 is naturally in a vertical state, and the center of the swing axis 3 is on the same straight line as the upper reference point C and the lower reference point B. Of course, at this time, the measurement line L and the straight line should coincide in the front and rear directions . When it is necessary to form a slanted line at a certain angle relative to the vertical direction, the part of the hand-held tether is tilted, and the straight line (ie, the gravity line) through the center of the swing axis 3, the upper reference point C and the lower reference point B is drawn. Read the deflection angle, which is the inclination angle of the measuring line L relative to the vertical direction. In a preferred embodiment, the protractor 7' of the swing part 1 forms a sharp corner near the tether part, and the upper sharp point D of the sharp corner is also located through the center of the swing axis, the upper reference point C and the lower reference point B On the straight line of three points (ie the gravity line), then the sharp point D can be used as an indication point for reading the inclination angle.

In addition, in yet another preferred embodiment of the present invention, a round flat bead 8 is also installed on the top of the vertical tester tie-down device to indicate the level and play an auxiliary role.

The tethering part 1 of the present invention is provided with a swing part 2 on both sides, so as to keep the device in a balanced state, and it is also convenient to observe the results from different directions.

In another preferred embodiment, one end of the swing shaft 3 is fixed on the tether part 1 through threads. During the positioning process of the positioning line L, because the positioning line L is vertical in one direction, it may be inclined in the other direction, and the positioning line L may be worn or cut off when the locator is turned horizontally. The above situation is often encountered when positioning the datum line in road construction and slope repair projects. At this time, the swing shaft 3 is loosened, so that the swing part 2 can be opened outwards, thereby avoiding contact with the positioning line L, which is convenient for operation.

Claims (12)

1. upright positioning device in a kind is characterized in that, comprises anchor line (string) part and swing part, and wherein anchor line (string) partly comprises the anchor line (string) device that is used to that the axis of swing of swing part is installed and is used to hitch slotted line, and the position of axis of swing and anchor line (string) device interfixes; Swing part has through hole, be installed on the described axis of swing through this through hole, can hang down and freely swing around axis of swing, reference point and following indication point are being set on the swing part, described reference point and indication point are positioned at swing part on the gravity vertical at axis of swing center, when the slotted line lower end is fixed and upper end when lying in the anchor line (string) device, as long as this slotted line when stretching state, in described, all pass through on all directions of the same level of upright positioning device described on reference point and following indication point, then can determine the straight line of a vertical ground.

2. upright positioning device in as claimed in claim 1 is characterized in that, described axis of swing is fixed on the anchor line (string) part by screw thread, can unclamp so that the swing part of installing on it outwards opens.

3. upright positioning device in as claimed in claim 1 is characterized in that, on the anchor line (string) part guard shield that is used to cover axis of swing and swing part top is installed also.

4. upright positioning device in as claimed in claim 3, it is characterized in that, guard shield comprises continuous being parallel to each other and isolated front and back two parts in upper end, wherein, the upper end of guard shield is fixed on the anchor line (string) part by pin, form the hole on the correspondence position of the front and rear part of guard shield, axis of swing is installed on the anchor line (string) part by described hole, and the upper end of swing part is installed on the axis of swing between the guard shield front and rear part.

5. as each described middle upright positioning device in the claim 1 to 4, it is characterized in that, swing part also comprises protractor, there are indication and vertical direction to become the scale of different drift angles on the protractor, the center of circle of protractor is positioned at described on the gravity vertical of axis of swing center, last reference point and following indication point, and in the process of the slotted line that forms relative vertical direction deflection certain angle with protractor, slotted line anchor line (string) point overlaps all the time with the center of circle of protractor, and deflection angle reads by the scale of slotted line indication.

6. upright positioning device in as claimed in claim 5 is characterized in that, described upward reference point is the center of circle of described protractor.

7. as claim 3 or 4 described middle upright positioning devices, it is characterized in that, the anchor line (string) part also comprises protractor, the center of described axis of swing is as the center of circle of protractor, be carved with on the protractor and indicate the scale that becomes different drift angles with vertical direction, when forming the slotted line of relative vertical direction deflection certain angle with protractor, deflection angle passes through through described axis of swing center, and the gravity vertical of indication point read under last reference point reached.

8. upright positioning device in as claimed in claim 7 is characterized in that described protractor is formed on the described guard shield.

9. upright positioning device in as claimed in claim 7, it is characterized in that, form wedge angle at swing part near described protractor place, the last cusp of wedge angle is positioned at described by on the gravity vertical of 3 of the center of axis of swing, last reference point and following reference points, as the indication point that reads deflection angle.

10. as each described middle upright positioning device in the claim 1 to 4, it is characterized in that described anchor line (string) device is the anchor line (string) axle.

11. as each described middle upright positioning device in the claim 1 to 4, it is characterized in that the both sides of anchor line (string) part are equipped with swing part, conveniently partly be in equilibrium state from different direction observationss and maintenance anchor line (string).

12. as each described middle upright positioning device in the claim 1 to 4, it is characterized in that, the par pearl of measuring levelness be housed at anchor line (string) part top.

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