JP4291798B2 - Tilt measuring instrument - Google Patents

Description

  The present invention relates to an inclination measuring instrument for measuring the inclination of a measuring object such as a pillar or wall of a building.

  2. Description of the Related Art Conventionally, an inclination measuring instrument that measures the inclination of a measurement object such as a pillar or wall of a building has been provided. This type of inclination measuring device is used, for example, at a construction site, and also when evaluating the degree of damage to a building due to vibration or earthquake of construction.

  An example of a conventional tilt measuring instrument is shown in FIG. This inclination measuring device protrudes from the prismatic column 61 and from both ends in the longitudinal direction of the column 61 in a direction perpendicular to one side surface of the column 61 and in the same direction with the same protruding dimension. The U-shaped measuring device main body 6 is composed of two arm portions 62 and 63.

  The other end of the thread 8 with a weight 7 suspended from one end is fixed to the upper arm. That is, the weight 7 and the thread 8 constitute a so-called downward swing, and the thread 8 always indicates the vertical direction.

  The lower arm 63 has a long hole (not shown) extending in the protruding direction of the arm 63, the thread 8 is inserted through the long hole, and the weight 7 is the lower arm. 63 is located on the lower side. A scale (not shown) indicating the correspondence between the position where the thread 8 passes through the elongated hole and the inclination of the column portion 61 is attached to the lower arm 63 along the longitudinal direction of the elongated hole. .

In order to measure the inclination of the column P as a measurement object using the conventional inclination measuring device, the inclination of the column part 61 and the column P are brought into contact with the ends of the arms 62 and 63 respectively. Match the tilt. Then, the scale of the position of the yarn 8 in a state where the position of the weight 7 is stable indicates the inclination of the column P.
Japanese Utility Model Publication No.57-16086

  However, the conventional tilt measuring instrument has a problem that it is difficult to accurately measure the tilt of the measuring object because the position of the weight is not stable when the wind hits the yarn.

  This invention is made | formed in view of the said reason, The objective is to provide the inclination measuring device which can measure the inclination of a column correctly.

The invention of claim 1 is an inclination measuring device for measuring the inclination of a measuring object such as a pillar or wall of a building, and is a long prismatic columnar body that abuts on the measuring object, and a laser that generates laser light. Oscillator, and projecting in a direction perpendicular to one side of the column from one end in the longitudinal direction of the column , the laser oscillator is swung back and forth and left and right by a gimbal structure so that laser light is always irradiated vertically downward a support for rotatably supported, is projected from the other end of the cylindrical body in the same direction as the support, and a target body point of the laser oscillator by the laser beam is formed, to the target body, columnar body longitudinally scale point of the laser oscillator by the laser beam is formed if it was a vertical direction, characterized that you have provided along the projecting direction of the target body relative to the pillar body.

According to the present invention, unlike the case of using a downward swing, unlike the yarn, the laser beam is not hit by the wind and is not easily affected by the wind at the time of measurement. Therefore, the inclination of the measurement object can be measured more accurately. . In addition, by enabling the laser oscillator to swing back and forth and right and left, the orientation of the column body is adjusted so that the light spot is located on the scale of the target body, so that the longitudinal direction of the column body and the protruding direction of the target body It is possible to eliminate the inclination of the column in the orthogonal direction, and to measure the inclination of the measurement object more accurately with the inclination of the column strictly as the only projecting direction of the target.

  According to a second aspect of the present invention, in the first aspect of the present invention, a support is provided between a prohibition position that abuts the laser oscillator and prohibits the oscillation of the laser oscillator relative to the column, and a retreat position that allows the laser oscillator to swing. A stopper is provided that is displaceable with respect to the body.

  According to the present invention, since the stopper can be displaced to the prohibited position during transportation to prohibit the oscillation of the laser oscillator, the laser oscillator is hardly damaged during transportation.

  The invention of claim 3 comprises the measuring body pivoted at one end of the column body in the invention of claim 1 or 2, and a display means for displaying an angle formed by the measurement body and the column body. It is characterized by.

  According to this invention, for example, the measurement body is brought into contact with the other measured surface while the column body is brought into contact with one of the two measured surfaces such as the side surface of the column and the lower surface of the head, so The angle formed by the two measured surfaces can be measured by checking the display means in a state where the angle formed by the measured surface is matched with the angle formed by the two measured surfaces.

According to the present invention, by using a laser oscillator that is swingably supported so as to always emit laser light vertically downward, unlike the case of using a downward swing, the laser light is exposed to wind. Therefore, the inclination of the measurement object can be measured more accurately because it is not easily affected by wind during measurement. In addition, by enabling the laser oscillator to swing back and forth and right and left, the orientation of the column body is adjusted so that the light spot is located on the scale of the target body, so that the longitudinal direction of the column body and the protruding direction of the target body It is possible to eliminate the inclination of the column in the orthogonal direction, and to measure the inclination of the measurement object more accurately with the inclination of the column strictly as the only projecting direction of the target.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

This embodiment, as shown in FIG. 1 orthogonal, and the laser oscillator 1 for generating a laser beam, the column portion 21 of the prismatic elongated from one longitudinal end portion of the pillar portion 21 on one side of the pillar portion 21 And a column portion that protrudes in the direction (right direction in FIG. 1) and supports the laser oscillator 2 so as to be swingable so that the laser beam is always irradiated vertically downward as indicated by a one-dot chain line R. The measuring device main body 2 having a target portion 23 projecting in the same direction as the support portion 22 from the other end portion 21 and irradiated with the laser light of the laser oscillator 1 is provided. In addition, a bubble level 24 is built in the column portion 21. Hereinafter, the vertical direction is based on FIG. 1, and the lower left-upper right direction in FIG. 1 is referred to as the left-right direction, and the lower right-upper left direction in FIG.

  For example, the measuring instrument main body 2 is formed by attaching a component serving as a support portion 22 and a component serving as a target portion 23 to a stainless steel square tube-shaped component serving as a column portion 21 by screwing.

  As the laser oscillator 1, for example, a semiconductor laser oscillator that is also used as a laser pointer can be used.

  For example, as shown in FIG. 2, the support portion 22 has an arm portion 22 a connected to the column portion 21, and a shaft with respect to the arm portion 22 a in a through hole 22 b that extends vertically through the arm portion 22 a. The ring-shaped outer ring 22c pivotally supported so as to be able to swing left and right with the direction being the front-rear direction, and the laser oscillator 1 pivoted on the outer ring 22c so that the rotation axis is orthogonal to the rotation axis of the outer ring 22c. A so-called gimbal structure having an inner ring 22d for holding can be employed. The intersection between the rotation axis of the outer ring 22c and the rotation axis of the inner ring 22d, that is, the distance between the oscillation center of the laser oscillator 1 and the target portion 23 is, for example, 1 m.

  Further, a scale is provided on the upper surface of the target portion 23 along the protruding direction of the target portion 23 with respect to the column portion 21. This scale is provided so as to pass through the position where the light spot by the laser beam of the laser oscillator 1 is formed when the longitudinal direction of the column portion 21 is the vertical direction. In addition, a number indicating the distance from the position where the light spot by the laser beam of the laser oscillator 1 is formed is set to 0 near the scale when the longitudinal direction of the column portion 21 is the vertical direction. is there.

  In order to measure the tilt of the measurement object using the present embodiment, the measuring instrument main body 2 is placed in the orientation in which the support portion 22 is located above the target portion 23 with the power of the laser oscillator 1 turned on. In 21, the opposite surface of the surface from which the support portion 22 and the target portion 23 protrude is brought into contact with the measurement object. Then, in the target portion 23, a light spot is formed by the laser light of the laser oscillator 1 at a position corresponding to the inclination of the column portion 21 with respect to the vertical direction, that is, the inclination of the measurement object with which the column portion 21 abuts. That is, by reading the scale of the position of the light spot, it is possible to measure the inclination of the measurement object with which the column portion 21 abuts.

  Here, the protrusion dimension of the support part 22 with respect to the pillar part 21 and the protrusion dimension of the target part 23 with respect to the pillar part 21 are substantially equal. Thereby, for example, even with respect to a measurement target that has protrusions and cannot be brought into close contact with the column part 21, the tip of the support part 22 and the tip of the target part 23 are brought into contact with the measurement object, respectively. Can be matched to the inclination of the object to be measured. Further, by checking the bubble level 24 by bringing the tip of the support portion 22 and the tip of the target portion 23 into contact with a nearly horizontal surface to be measured such as a floor surface or a duck, respectively, the surface to be measured is horizontal. You can know whether or not.

  According to the above configuration, the laser light from the laser oscillator 1 is used to indicate the tilt of the object to be measured, so that unlike the conventional tilt measuring device using a downward swing, the laser beam is not exposed to wind. Therefore, since it is hard to be influenced by the wind, the inclination of the measuring object can be measured accurately.

  Here, the direction actually measured is only the inclination in the direction in which the laser oscillator 1 swings in the projecting direction of the target portion 23 with respect to the column portion 21. The direction of the pillar part 21 is adjusted so that the light spot is located on the scale of the target part 23 by making it swingable, and the direction orthogonal to the longitudinal direction of the pillar part 21 and the protruding direction of the target part 23 The inclination of the column part 21 (hereinafter referred to as “unnecessary inclination”) is eliminated, and the inclination of the column part 21 can be strictly measured only in the protruding direction of the target part 23 so that the inclination of the measurement object can be measured more accurately. . If the accuracy obtained by reducing unnecessary inclination by visual observation is sufficient, the laser oscillator 1 may be oscillated only in the protruding direction of the target portion 23 with respect to the column portion 21. In this case, In addition, the structure of the support portion 22 can be simplified and the manufacturing cost can be reduced.

  By the way, if the laser oscillator 1 is transported while being swingable, the laser oscillator 1 may be caught by an obstacle and damaged.

  Therefore, as shown in FIG. 3, a stopper 3 that prohibits the oscillation of the laser oscillator 1 during transportation may be provided. The stopper 3 in FIG. 3 includes a mounting bracket 31 that is fixed to the column portion 21 of the measuring instrument main body 2, and a fixing plate 32 that is pivotally supported with respect to the mounting bracket 31 so as to swing up and down with the axial direction as the front-rear direction. Consists of.

As shown in FIG. 4, the mounting bracket 31 has two through holes 31a, for example, a main body portion 31b fixed to the column portion 21 by blind rivets inserted through the through holes 31a, and both end portions of the main body portion 31b. And an arm portion 31c projecting in the same direction from each other. Each arm portion 31c is provided with a shaft insertion hole 31d through which the shaft body 33 is inserted.

As shown in FIG. 5, the fixing plate 32 has a shaft insertion hole 32a through which the shaft body 33 is inserted in the width direction, and a holding hole 32b in which the lower end portion of the laser oscillator 1 is stored and held is thick. It is penetrated in the direction. The fixed plate 32 is pivotally supported by a shaft body 33 inserted through the shaft insertion hole 31 d of the mounting bracket 31 and the shaft insertion hole 32 a of the fixed plate 32. As a result, the fixed plate 32 is placed in a position where the lower end portion of the laser oscillator 1 is housed in the holding hole 32b and slightly rotated below the prohibition position where the oscillation of the laser oscillator 1 with respect to the column portion 21 is prohibited. It is freely displaceable from a retracted position that rotates upward from the position and does not interfere with the operation of the laser oscillator 1 during measurement.

  Further, a return spring 34 is provided which is a wire spring that abuts against the column portion 21 of the measuring instrument body 2 and the fixed plate 32 and biases the fixed plate 32 toward the retracted position.

  A method of using the stopper 3 will be described. During transportation, the laser oscillator 1 is introduced into the holding hole 32b by slightly lowering the fixing plate 32 from the prohibited position against the spring force of the return spring 34. Then, the fixing plate 32 is maintained at the prohibited position by the spring force of the return spring 34 and the oscillation of the laser oscillator 1 is prohibited, so that the laser oscillator 1 is prevented from being damaged. Here, the inner surface of the holding hole 32b is inclined so as to increase the inner diameter as the position is closer to the opening located at the upper side in the prohibition position, thereby making it easier to introduce the lower end portion of the laser oscillator 1 into the holding hole 32b. ing. In use, the fixing plate 32 is slightly lowered from the prohibited position against the spring force of the return spring 34, and the laser oscillator 1 is led out from the holding hole 32b and retracted from the movable range of the fixing plate 32, The fixing plate 32 is returned to the retracted position by the spring force of the return spring 34. Then, the fixed plate 32 does not interfere with the oscillation of the laser oscillator 1 and the tilt can be measured without any problem.

  Furthermore, you may provide the illuminating device (not shown) which has light sources, such as a light emitting diode, and illuminates the scale of the target part 23, for example. Such an illuminating device or a battery serving as a power source for the illuminating device can be incorporated in the column portion 21 of the measuring device main body 2, for example. Employing this configuration facilitates measurement in the dark.

  Moreover, you may provide the instruction | indication part (not shown) slidable to the left and right with respect to the target part 23 along a scale. Since such an instruction unit can be realized by a known technique, detailed description thereof is omitted. If this configuration is adopted, the measured tilt can be memorized by sliding the pointing unit to indicate the position where the light spot of the laser beam is formed during tilt measurement. For example, two tilts can be compared. Useful when you want.

  Furthermore, as shown in FIG. 6, the column portion 21 is extended above the support portion 22, the measurement unit 25 is pivotally attached to the upper end portion of the column portion 21, and the angle formed by the measurement unit 25 with respect to the column portion 21. You may provide the display part 4 which displays. The display unit 4 includes, for example, a display plate 41 having an arc-shaped through hole 41 a centered on the rotation center of the measurement unit 25 and fixed to the measurement unit 25, and is screwed into the column unit 21 through the through hole 41 a. The display screw 42 can be used. In this case, if the width dimension of the through hole 41 a is made smaller than the outer diameter of the head of the display screw 42, the rotation of the measuring unit 25 relative to the column part 21 can be prohibited by tightening the display screw 42. The through hole 41a is provided with a scale and a number (not shown) indicating the correspondence between the angle formed by the column portion 21 and the measurement portion 25 and the position of the display screw 42. If this configuration is adopted, the column portion 21 is brought into contact with a first measured surface such as a side surface or a wall surface of the column P, and the measurement unit 25 is disposed on the floor (not shown) or the lower surface of the Kamoi K, for example. In such a state that the angle formed between the column portion 21 and the measurement unit 25 is matched with the angle formed between the first measurement surface and the second measurement surface. By confirming the scale close to the display screw 42 on the display plate 41, the angle formed by the first measured surface and the second measured surface can be measured. Further, in the example of FIG. 6, the target portion 23 is pivotally attached to the lower end portion of the column portion 21, the angle formed by the target portion 23 with respect to the column portion 21 is variable, and the display unit 4 is placed on the target portion 23 side. Also, the target unit 23 can measure the angle. Note that the positional relationship between the display plate 41 and the display screw 42 is changed, the display plate 41 is fixed to the column portion 21 (or the target portion 23), and the display screw 42 is screwed to the measurement unit 25 (or the column portion 21). May be.

  In addition, the display unit 4 is not limited to the above configuration, and instead of the display plate 41 and the display screw 42, another known angle measuring device structure may be employed.

It is a perspective view which shows embodiment of this invention. It is a top view which shows the principal part same as the above. It is a front view which shows the principal part of another form same as the above. It is a figure which shows the fixing plate which comprises the stopper of another form same as the above, (a) is a top view, (b) is a front view. It is a figure which shows the attachment metal fixture which comprises the stopper of another form same as the above, (a) is a front view, (b) is a right view, (c) is a top view. It is explanatory drawing which shows another form same as the above. It is a front view which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laser oscillator 2 Measuring device main body 3 Stopper 4 Display part 21 Column part 22 Support part 23 Target part 25 Measurement part P Column

Claims (3)

An inclination measuring instrument that measures the inclination of a measuring object such as a pillar or wall of a building,
A long prismatic columnar body that comes into contact with the measurement target, a laser oscillator that generates laser light, and one end in the longitudinal direction of the columnar body projecting in a direction perpendicular to one side surface of the columnar body , and is always vertically below The laser oscillator is supported by a gimbal structure so that the laser beam can be oscillated back and forth and left and right so that the laser beam can be radiated in the direction, and is projected from the other end of the column in the same direction as the support. A target body on which a light spot by light is formed , and the target body has a scale for forming a light spot by the laser light of the laser oscillator when the longitudinal direction of the column body is vertical. inclination measuring device which is characterized that you have provided along the projecting direction of the target body.   A stopper that is displaceable with respect to the support body is provided between a prohibiting position for prohibiting the oscillation of the laser oscillator relative to the column body by contacting the laser oscillator and a retracting position for allowing the laser oscillator to swing. The inclination measuring device according to claim 1.   The tilt measuring instrument according to claim 1 or 2, further comprising: a measuring body pivotally provided at one end of the column body; and display means for displaying an angle formed by the measuring body and the column body.

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