JP2005171625A - Leveling string looseness correcting unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leveling string looseness correcting unit for correcting the looseness of a leveling string capable of grasping a degree of looseness of the leveling string, for requiring much time and labor for pulling the leveling string by arranging practises in large numbers, though the practice is arranged by leveling out in response to the height of design, in a slightly inclined construction such as a road and a drainage channel. <P>SOLUTION: This correcting unit corrects a looseness degree of the leveling string when tensing the leveling string. The correcting unit is composed of a guide plate 1, a sliding part 4 sliding on the guide plate, a cross-shaped shaft 9 arranged in its sliding part 4, a leveling string locking part 11 arranged to an upper vertical shaft 9a of its cross-shaped shaft 9, a spring 15 locked to a lower vertical shaft 9a, and a sliding screw 8 for sliding the sliding part 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a corrector for clarifying the degree of looseness and correcting the looseness when tensioning a water yarn.

When tensioning the water thread, the water thread is light and slightly slack between short spans, but when the span is over 10m, it cannot be ignored in operations that require accuracy in height and gradient. It becomes slack.
Conventionally, in such a case, the construction is performed in such a way that the span is halved and the error due to slack is reduced. Or, it is constructed with increased tension and less slack. However, there is a limit to the tension, and it does not change that it is slack, and it is necessary to correct the slack according to the tension. There are few jigs to easily correct the slack, and the following literature is a certain degree as a water string tension jig.
JP 2000-55662 A

Various equipment and jigs have been devised for performing a horizontal construction as long as the construction is flat, such as the foundation of a building. However, in the case of construction that is somewhat inclined, such as roads and drainage channels, the level is set according to the height of the design, and there is a way to use it. It takes time and effort to stretch.
An object of the present invention is to provide a water thread slack correction device that can grasp the degree of slack of the water thread, and further correct the slack of the water thread to perform proper construction. is there.

The slack of the water string is a kind of catenary curve, not a parabola. However, when the slack is slight, it can be regarded as a quadratic curve, and the slackness can be obtained by the following equation.
D = W * S * S / 8T
D = Looseness of water thread (mm)
W = Combined load per unit length (g / m)
S = span (m)
T = tension (g)
For example, if W = 0.3 g / m, S = 12 m, and T = 1 kg, the slack of the water thread is 5.4 mm. This slack is calculated when it is clear that the tension is 1 kg, and the combined load per unit length and the span are clear.
The generally used water yarn is about 0.3 g / m, and the combined load per unit length can be considered constant if the same water yarn is used at the work site. If the tension of the water yarn can be determined to a desired value, only the span of the water yarn changes. If the span is known, an accurate slack value can be obtained, and proper construction is possible even with a long span.

  For example, when the combined load per unit length is 0.3 g / m, the relationship between the tension, the span, and the slack is represented by <Graph 1>.

  The suspension curve (catenary curve) can be regarded as a quadratic curve when the length of slack is 1/10 or less with respect to the length of the span. Accordingly, when the support point is 0 and the lowest point of the parabola is −1, the slackness between the support point and the lowest point is −0.75. These values are shown in graphs as shown in <Graph 2>.

  A compensator that corrects the slackness of the water yarn when tensioning the water yarn, a guide plate provided with a slide rail on the edge of the long side of the rectangle, and a rectangular shape on the slide rail of the guide plate A sliding portion in which the bottom plate of the sliding portion is inserted, a bearing hole is provided in an opposing surface standing on the bottom plate of the sliding portion, a cross-shaped shaft fitted in the bearing hole, and a vertical axis above the cross-shaped shaft The water thread locking part provided on the shaft and the water thread locking part are movable along the vertical axis, and the vertical axis below the cross-shaped shaft passes through the sliding hole of the guide plate, A spring with one side locked on the vertical axis, and the other side of the spring is locked with a spring locking part of a standing plate provided in a T-shape on one short side of the guide plate. An L-shaped standing plate is provided on the short side of the sliding plate, and a sliding screw that is screwed into a screw hole provided in the standing plate, and the sliding screw is rotated to advance the sliding portion. A mechanism for sliding along the rail; A graduation unit that describes the tension scale in accordance with the tension value, and stringlines load scale section that describes the unit length weight of water yarns, in constituting the water yarn slack corrector, to solve the above problems.

  As a result, the sliding knob can be turned to slide the sliding portion to match the desired spring tension. Furthermore, by turning and turning the water thread locking portion, it is possible to match the unit length load of the water thread used at the site, and by looking at the attached graph, the correction value of the slack can be easily obtained. .

  2. The slack correction device according to claim 1, wherein when the water yarn is stretched, the correction device is attached to a horizontal plate or the like, the horizontal plate mounting plate, and the horizontal plate facing the horizontal plate mounting plate. A position adjusting plate provided with a fixing means capable of sandwiching a plate or the like by a presser and a horizontal plate mounting bracket capable of adjusting a distance between the presser foot and the horizontal plate mounting plate so as to be overlapped with a screw; The mechanism can tilt the position adjusting plate with screws at the four corners of the adjusting plate, and a T-shaped standing plate attached to the guide plate is inserted into the position adjusting rail provided on the position adjusting plate. The guide plate can be finely adjusted vertically and horizontally.

Thereby, this corrector can be clamped corresponding to a horizontal board of various dimensions. The distance between the opposing horizontal plate mounting plate and the horizontal plate presser is adjusted by the horizontal plate fixing screw that is attached to the horizontal plate presser and the L-shaped metal bracket that is overlapped. And done.
In the field, the horizontal plate is not always provided at right angles to the water thread. With respect to the inclination, the inclination adjusting screws at the four corners of the position adjusting plate are provided so that the position adjusting plate can be inclined so that the water thread and the slide rail are parallel to each other.
Furthermore, when installing this corrector, the horizontal plate fixing screw is tightened by aligning the water thread with the reference point, but it is slightly displaced after installation, and the U-shaped position adjustment provided on the position adjustment plate A T-shaped standing plate attached to the guide plate is fitted into the rail, and the guide plate can be finely adjusted up and down and left and right with a height adjusting screw and a left and right adjusting screw.

By using the corrector of the present invention, the following becomes possible.
B) The tension of the water thread becomes clear, the degree of looseness can be known, and the correction value can be obtained at a glance by looking at the attached graph, and not only the lowest point but also the intermediate position can be corrected .
(B) If correction is made even between long diameters, it is possible to perform proper construction, and it is not necessary to provide many ways of working, and work can be performed efficiently.
C. Since the construction is performed with correction of slackness of the water thread, the finish is improved, and it is efficient without the need for correction later.
D. Can be attached easily with horizontal plates or vertical piles, and even when the water string gets in the way and is removed, it can be tensioned with the same tension when reattached.

  Embodiments of the present invention will be described with reference to the drawings. The shape of FIGS. 1 to 6 is an example of the embodiment, and various modifications are possible as long as the function described in the solving means can be achieved.

  The present invention is a corrector that corrects the slackness of the water yarn when the water yarn is stretched, and as shown in FIG. 2, the guide plate 1, the sliding portion 4 that slides on the guide plate 1, and the sliding portion thereof. The cross-shaped shaft 9 provided on the moving portion 4, the water thread locking portion 11 provided on the vertical axis 9a above the cross-shaped shaft 9, the spring 15 locked on the lower vertical axis 9a, and the sliding This is a corrector that is composed of a sliding screw 8 for sliding the portion 4 and balances the tension of the spring and the tension of the water thread to obtain and correct the slackness of the water thread.

  As shown in FIG. 5, the guide plate 1 is provided with U-shaped slide rails 6 on both edges of the long side, and the bottom plate of the sliding portion 4 is fitted into the slide rail 6, and the slide screw 8. The shape can slide.

  As shown in FIG. 5, as an example, the sliding portion 4 is preferably a substantially rectangular solid in terms of strength, but the opposing surface standing on the bottom surface of the sliding portion 4 is functionally provided with a bearing hole. It may be formed of a bracket as provided. Further, the surface erected on the short side of the bottom surface of the sliding portion 4 may be formed of a bracket that can fit the tip of the sliding screw 8.

As shown in FIG. 2, the sliding screw 8 passes through a screw hole formed in the L-shaped upright plate 3, and its tip is fitted to the sliding portion 4 so as to be rotatable.
If the L-shaped standing plate 3 is not thick enough to provide screw holes, a nut may be joined to the threaded hole portion of the L-shaped standing plate 3.
The slide knob 7 is attached so as to be able to slide the sliding portion 4 by hand, and the sliding portion 4 can be slid by rotating the sliding screw 8 to rotate. It is formed as a mechanism.

As shown in FIG. 2, the slide rail 6 is provided with tension scale portions 14 on both sides of the slide rail 6 so that the tension of the spring 15 can be adjusted from any side of the corrector. Or although the tension scale part 14 is not shown in figure, you may make it the shape provided in the upper part of the sliding screw 8 so that the movement of the surface which fitted the sliding screw 8 of the sliding part 4 can be confirmed.
The spring locking portion 16 is preferably formed of a male screw and a female screw so that the tension of the spring 15 can be calibrated.

  As shown in FIG. 2, it is desirable that the water thread locking portion 11 has a conical shape and always slides to the lower end when the water thread is stretched. Moreover, the water thread | yarn latching | locking part 11 is attached to the rod-shaped vertical axis | shaft 9a provided with the screw. By turning this water thread locking portion 11, it is formed so that it can be screwed up and down. As shown in FIG. 5, when the water thread locking portion 11 is lowered according to the unit length load of the water thread, the stretched water thread is not in contact with the position adjusting plate 25 and the horizontal plate mounting plate 21. A notch 19 is provided. The position adjusting plate 25 and the horizontal plate mounting plate 21 may have a shape in which the vertical length is shortened and the notch 19 is not provided, but in that case, the thick horizontal plate mounting bracket 20 is provided with strength. You can do it.

As shown in FIG. 4, the size of the disc-shaped water thread locking disk 12 is formed so as to be close to the water thread load scale portion 13 in order to make it easy to match the scale. It is formed so as to move integrally with the part 11.
As shown in FIG. 3, the water thread load scale portions 13 are provided on both sides so that the water thread locking disc 12 can be aligned with the scale from either side of the corrector.

  As shown in FIG. 1, as an example of implementation, reinforcing columns are provided on both sides of the water thread load scale portion 13. May be.

Even if the span and tension are the same, the degree of slackness of the water yarn varies depending on the unit length load of the water yarn, but it is confusing to create a graph for each unit length load. What is shown in <Graph 1> is a slack for each tension with a unit long load of 0.3 g / m, which is generally used.
When the length from the shaft core of the cross-shaped shaft 9 to the spring locking portion is 1, and the length from the shaft core to the water thread locking portion 11 is 1, the tension of the water thread is the cross-shaped shaft. When 9 stands upright, it becomes equal to the tension of the spring. In <Graph 1>, which represents a slack with a unit long load of 0.3 g / m for each tension, for example, the slack of a water thread with a unit long load of 0.24 g / m can be obtained. This is a load scale portion 13.

  In the case of 0.24 g / m with respect to the unit long load of 0.3 g / m, the unit long load is 80%. In the equation D = W * S * S / 8T for calculating the sag, if the denominator is 80% when the numerator is 80%, the sag is the same. Therefore, if the length from the shaft core to the water thread locking portion 11 is 1.25 and a graduation of 0.24 g / m is engraved at that position, even if the spring tension is 1 kg, the tension of the water thread Becomes 0.8 kg, and the slack for each tension in <Graph 1> can be used as it is. The slack of various unit length loads can be obtained from <Graph 1> by moving the water thread locking portion 11 up and down to match the unit length load of the water yarn.

  In principle, if the water thread locking portion 11 is rotated and raised, it can cope with a unit long load of 0.1 g / m, but the vertical axis 9a becomes too long and is not practical. Therefore, the length of the vertical axis 9a up to about 0.2 g / m, which is 1.5 times as large as 0.3 g / m, is 0.16 g / m, and the scale is doubled to 0.36 g / m. Match. The actual tension of the water yarn is 1.2 kg, but it may be corrected by <Graph 1> as a tension of 2 kg which is twice as much.

  Alternatively, in the case of a unit long load of 0.9 g / m, the scale is adjusted to a third of 0.3 g / m. In this case, when the actual unit length load is 1/3 and the tension of the spring is 3 kg, <graph 1> may be corrected as a tension of 1 kg.

  In order to prevent the cruciform shaft 9 from being greatly inclined due to the bias of the spring, the stopper hole 17 provided in the sliding portion bottom plate 5 is formed in an elliptical shape so that the inclination can be limited as shown in FIG. Has been. Further, the sliding hole 18 provided in the guide plate 1 is formed in a horizontally long hole so that the cruciform shaft 9 can freely slide and does not limit the inclination of the shaft.

  As shown in FIG. 1, side plates 30 are attached to both sides of the main body, and graph 1 is attached to one side plate 30 and graph 2 is attached to the other side plate 30. This graph may be written on the side plate 30 itself. The side plate 30 is provided with a scale hole 31 for looking into the tension scale portion 14. However, if the side plate 30 has a size that does not cover the tension scale portion 14, it is not necessary to provide the scale hole 31.

  A metal fitting for attaching this corrector to a horizontal plate or a pile when tensioning a water string, as shown in FIG. 1, a horizontal plate mounting bracket 20 and a horizontal plate mounting plate on one side of the U-shape. 21 is fixed, a horizontal plate retainer 23 is attached to the other side, rectangular plate-like position adjustment plates 25 are attached by screws at four corners of the horizontal plate attachment plate 21, and the position adjustment rail 26 of the position adjustment plate 25 is attached to the position adjustment rail 26. The structure is such that the T-shaped standing plate 2 is inserted and the water thread locking portion 11 can be finely adjusted vertically and horizontally.

  As shown in FIG. 1, the horizontal plate mounting plate 21 has a rectangular plate shape, and is provided with a screw hole for mounting the horizontal plate mounting bracket 20 on the horizontal plate mounting plate 21 and screwing the inclination adjusting screw 29. Yes. When the horizontal plate mounting bracket 20 is overlapped with L-shaped brackets and is U-shaped, and has a width compared to the horizontal plate such as a pile, the L-shaped bracket slide screw 24 is loosened, and the horizontal plate mounting bracket 20 It is formed so that it can be extended by sliding.

  As shown in FIG. 2, the horizontal plate fixing screw 22 passes through the screw hole of the horizontal plate mounting bracket 20, and its tip is fitted to the horizontal plate presser 23 so as to be rotatable.

As shown in FIG. 1, the four corners of the position adjusting plate 25 are fixed by four screws. This is because when the horizontal plate is slightly inclined with respect to the stretched water thread, this inclination adjusting screw is used. It is formed so that the water thread and the slide rail 6 can be adjusted to be parallel at 29.
The inclination adjusting screw 29 passes through the screw hole of the position adjusting plate 25, and its tip is fitted to the horizontal plate mounting plate 21 so as to be rotatable. By rotating the inclination adjusting screw 29, the position adjusting plate 25 can be inclined with respect to the horizontal plate attaching plate 21.

  This corrector is attached to the horizontal plate with a horizontal plate fixing screw 22 in accordance with a reference point provided on the horizontal plate. However, when the water thread is stretched, the corrector deviates somewhat from the reference point, as shown in FIG. The height adjusting screw 27 and the left and right adjusting screw 28 are formed so that they can be finely adjusted.

  As shown in FIG. 2, the T-shaped stand 2 attached to the guide plate 1 is fitted into a pair of U-shaped position adjusting rails 26 provided on the position adjusting plate 25, and the main body is viewed from the side. The lower surface of the position adjustment plate 25 is provided with a surface bent in an L shape, and similarly, the lower portion of the T-shaped upright plate 2 is provided with a surface bent in an L shape. A screw hole is formed near the center of the surface, the height adjusting screw 27 penetrates the screw hole of the bent surface of the position adjusting plate 25, and the tip thereof is the bent surface of the T-shaped stand 2. It is formed so that it can be finely adjusted by sliding up and down by turning the height adjusting screw 27.

  As shown in FIG. 1, the T-shaped upright plate 2 inserted into the position adjustment rail 26 is formed so that it can be finely adjusted by sliding left and right with a left and right adjustment screw 28 provided on the position adjustment rail 26. .

(how to use)
First, the corrector is applied to the horizontal plate or the pile, and the horizontal plate is fixed to the horizontal plate (pile) with the horizontal plate fixing screw 22 in accordance with the approximate height and horizontal direction.
B) Turn the sliding knob 7 so that the desired tension is obtained, and adjust it to the scale of the tension scale 14.
Next, the unit length load of the water thread used at the site is adjusted to the scale of the water thread load scale part 13 by moving the water thread locking part 11 up and down.
D. Water thread is hung on the water thread locking portion 11, and the top and bottom, left and right are adjusted with a fine adjustment screw so that the water thread is aligned with the reference point measured by transit or the like.
E. If the cross-shaped shaft 9 stands perpendicular to the horizontal line of the water thread, the water thread has a scaled tension. If it is not upright, hang it again. Alternatively, the tension can be known by turning the sliding knob 7 to stand upright. A slight tilt is acceptable as long as it falls within the range of the slackness error. Although not shown in the drawing, a clip for holding the water thread is attached to the water thread locking portion 11 so that the water thread can be easily attached and detached so as not to take time to adjust the tension of the water thread.

Graph 1

Graph 2

The perspective view of the main body of the Example of this invention Side view of the main body of the embodiment of the present invention AA sectional view of the side view of the main body of the embodiment of the present invention The top view of the main body of the Example of this invention Assembly drawing of the main body of the embodiment of the present invention The top view of the sliding part baseplate of the Example of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Guide plate 2 T-shaped standing plate 3 L-shaped standing plate 4 Sliding part 5 Sliding part bottom plate 6 Sliding rail 7 Sliding knob 8 Sliding screw 9 Cross-shaped shaft 9a Vertical axis 10 Bearing hole 11 Water thread engagement Stop part 12 Water thread locking disk 13 Water thread load scale part 14 Tension scale part 15 Spring 16 Spring locking part 17 Stopper hole 18 Sliding hole 19 Notch 20 Horizontal plate mounting bracket 21 Horizontal plate mounting plate 22 Horizontal plate fixing Screw 23 Horizontal plate retainer 24 L-shaped bracket slide screw 25 Position adjustment plate 26 Position adjustment rail 27 Height adjustment screw 28 Left and right adjustment screw 29 Tilt adjustment screw 30 Side plate 31 Scale hole 32 Graph A Water thread B Horizontal plate

Claims (2)

  A compensator that corrects the slackness of the water yarn when tensioning the water yarn, a guide plate provided with a slide rail on the edge of the long side of the rectangle, and a rectangular shape on the slide rail of the guide plate A sliding portion in which the bottom plate of the sliding portion is inserted, a bearing hole is provided in an opposing surface standing on the bottom plate of the sliding portion, a cross-shaped shaft fitted in the bearing hole, and a vertical axis above the cross-shaped shaft The water thread locking part provided on the shaft and the water thread locking part are movable along the vertical axis, and the vertical axis below the cross-shaped shaft passes through the sliding hole of the guide plate, A spring with one side locked on the vertical axis, and the other side of the spring is locked with a spring locking part of a standing plate provided in a T-shape on one short side of the guide plate. An L-shaped standing plate is provided on the short side of the sliding plate, and a sliding screw that is screwed into a screw hole provided in the standing plate, and the sliding screw is rotated to advance the sliding portion. A mechanism for sliding along the rail; Water yarn slack corrector, characterized in that provided a tension scale part that describes the scale in accordance with the tension value, and stringlines load scale section that describes the unit length weight of water yarns, the. 2. The slack correction device according to claim 1, wherein when the water yarn is stretched, the correction device is attached to a horizontal plate or the like, the horizontal plate mounting plate, and the horizontal plate facing the horizontal plate mounting plate. A position adjusting plate provided with a fixing means capable of sandwiching a plate or the like by a presser and a horizontal plate mounting bracket capable of adjusting a distance between the presser foot and the horizontal plate mounting plate so as to be overlapped with a screw; The mechanism can tilt the position adjusting plate with screws at the four corners of the adjusting plate, and a T-shaped standing plate attached to the guide plate is inserted into the position adjusting rail provided on the position adjusting plate. A water string slack corrector characterized in that the guide plate can be finely adjusted vertically and horizontally.

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