JPH09210677A - Cavity measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cavity measuring device which is suitable for quantitatively measuring the size of a cavity behind the wall of a tunnel. SOLUTION: This device is provided with an illuminating means 1 for illuminating the measuring direction within a cavity, a video camera 2 placed adjacent to the means 1 that picks up the illuminated area, a holding plate 5 for holding the video camera 2 and means 1, and a support mechanism for main body for inserting the video camera 2 and means 1 into the specified cavity. The mechanism is provided with a scale body (steel measuring tape) 11 including a scale 10 with graduations and a scale pay-off guide mechanism 12 for setting the illuminating direction of the means 1 to the pay-off direction of the scale 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cavity measuring device, and more particularly, to a cavity suitable for measuring a cavity formed on the back side of a wall in a tunnel of various sizes or a cavity under the floor or above the ceiling of a structure. Regarding measuring device.

[0002]

2. Description of the Related Art Generally, for a cavity or the like formed on the back side of a wall in a tunnel of various sizes, a fiberscope or a borehole scope has been developed as a device for directly monitoring or observing the actual condition. This method is also applied to the measurement of voids under the floor or above the ceiling of a structure. On the other hand, as a method for indirectly monitoring or searching for this type of cavity, a method has been developed in which electromagnetic waves or sound waves are used, or a temperature difference is measured to infer the peeling state or the like from the outside.

[0003]

However, in the above-mentioned conventional example, the one using the fiberscope or the borehole scope is suitable for grasping the internal condition, but the specific size and the uneven condition are quantitatively determined. There was the inconvenience that it could not be measured. Further, electromagnetic waves, sound waves, and the like are suitable for detecting the presence of cavities and the like, but even with such a method, it is not possible to quantitatively measure the concrete size and the state of unevenness. Was occurring.

[0004]

It is an object of the present invention to improve the disadvantages of the conventional example, and in particular, the size of the cavity existing on the back side of the wall in a building such as a tunnel or the space under the floor or the ceiling of the building. It is an object of the present invention to provide a cavity measuring device suitable for quantitatively measuring the size.

[0005]

In order to achieve the above object, in the invention according to claim 1, an illuminating means for illuminating the measurement direction in the cavity and an illumination area provided near the illuminating means are provided. A video camera, a holding plate for holding the video camera and the illuminating means, and a main body support mechanism for inserting the video camera and the illuminating means into a predetermined cavity through the holding plate. Then, this main body strut mechanism is equipped with a scale main body accommodating a scale with a scale, and a main body strut mechanism is equipped with a scale feeding guide mechanism for setting the feeding direction of this scale to the illumination direction of the illumination means. Is adopted.

Therefore, according to the invention of claim 1,
After pulling out the scale appropriately, set the whole device to the operating state and insert the video camera part into the inspection hole of the tunnel ceiling, for example, and simultaneously record the image inside the cavity on the video monitor etc. in real time. It is possible to output a video signal that can be recorded by the department.

At the same time, when measuring the size of the cavity behind the ceiling in the tunnel, the scale is immediately fed into the cavity along the scale feeding guide mechanism. In this case, the scale is fed into the cavity along the shooting direction of the video camera while being illuminated by the illumination means. The amount of extension of this scale measures the size of the cavity along the tunnel ceiling. This situation is also continuously shot by a video camera.

According to a second aspect of the present invention, the main body strut mechanism is configured to include a holding plate that holds the above-mentioned holding plate so that the holding plate can be lifted and rotated, and a strut portion that holds the holding plate on a pedestal. The method is adopted.

Therefore, according to the second aspect of the invention, the same function as that of the first aspect of the invention described above is obtained, and the holding plate is changed in direction by loosening the holding state on the pedestal. It is possible to measure the depth in different directions in the cavity even when the legs of the column are fixed.

According to the third aspect of the present invention, the scale feeding guide mechanism is provided with a first guide roller portion provided on the scale feeding side with respect to the outside, the first guide roller portion, and the scale main body (steel tape measure) described above. ) And the 2nd guide roller part equipped between them. Then, one of the first guide roller portion and the second guide roller portion is provided with a scale pinching function of pinching the scale in a state of being pressed from both sides and rotation in the feeding direction. The method is to add a reverse rotation prevention function that allows only this.

Therefore, the invention according to claim 3 functions in the same manner as the invention according to claim 1 described above, and it is possible to stop the fed scale at an arbitrary position.

According to a fourth aspect of the present invention, the guide roller located on the upper side of the above-mentioned first guide roller portion is
The center part is composed of a barrel-shaped guide roller that bulges out as a whole, and the lower guide roller corresponds to the above-mentioned barrel-shaped guide roller, and the diameter of the center part is smaller than the diameter of both ends. It consists of a drum-shaped guide roller,
The method is adopted.

Therefore, according to the invention described in claim 4, the same function as that of the invention described in claim 3 is obtained, and in addition, the extended scale is in a state in which the cross section thereof is concave upward. Since the rigidity is enhanced, the space area can be measured relatively deep without bending downward.

According to the fifth aspect of the present invention, the scale feeding guide mechanism described above is mounted on the holding plate portion of the main body support mechanism.

Therefore, the invention according to claim 5 functions in the same manner as the invention according to claim 1, 2, 3 or 4 described above, and a new equipment member for a scale feeding guide mechanism. Since it is not necessary to prepare, it is possible to simplify the configuration.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
It will be described with reference to FIG. The embodiment shown in FIGS. 1 to 5 includes two illumination means 1 for illuminating a measurement direction in a cavity, a video camera 2 provided near the illumination means 1 for photographing the illumination area, and A disk-shaped holding plate 5 for holding the video camera 2 and the above-mentioned illumination means 1.
And a main body support mechanism 4 for inserting the above-mentioned video camera 2 and illumination means 1 into a predetermined cavity through the holding plate 5.
And

As shown in FIG. 3, the main body support mechanism 4 holds the above-mentioned holding plate 5 on the back surface side (lower surface side), and raises and lowers the holding plate 5 in the shooting direction of the video camera 2 described above. An L-shaped holding plate 6 for movably holding,
It is composed of a pedestal 7 for fixing the holding plate 6 and a column portion 8 for fixing and holding the pedestal 7 via a screw portion. Each member constituting the main body strut mechanism 4 is made of an aluminum material in consideration of portability, and its weight is reduced.

Reference numeral 6A indicates a reinforcing plate mounted on the lower end of the holding plate 6, and reference numeral 6B indicates a mounting plate for a steel tape measure 11, which will be described later. Further, the holding plate 6
Has a relatively large hole 6F for the mounting screw 6E.
Is provided. In FIG. 3, reference numeral 20 is a base 7
The azimuth meter equipped in the part via the attachment member 20A is shown. As a result, the measuring operator can record the size and shape of the cavity while always grasping the direction.

Reference numeral 5a indicates a holding shaft which holds the holding plate 5 on the holding plate 6 via a downwardly projecting piece 5A so that the holding plate 5 can be rotated up and down. Further, a tension spring 5B is provided between the holding plate 5 and the holding plate 6 which are located on the right side of the holding shaft 5a in FIG. 1 (the rear side of the video camera 2 and the illumination means 1). There is. On the other side (on the front side of the video camera 2 and the illumination means 1),
An undulation direction setting wire 5C for appropriately pulling the holding plate 5 toward the holding plate 6 to set the undulation direction of the holding plate 5 is provided.

Reference numerals 5E and 5F indicate guide rollers for guiding the traveling of the up-and-down direction setting wire 5C.
G indicates a locking projection that locks the up-and-down direction setting wire 5C.

Here, the video camera 2 is mounted on the central portion of the holding plate 5, and the above-mentioned two illumination means 1 are mounted on both sides of the video camera 2 in the shooting direction of the video camera 2. Further, in the present embodiment, the pedestal 7 and the column portion 8 shown in FIG. 3 are configured in the same manner as a tripod used during normal camera photography. For this reason, this pedestal 7 portion has a structure that can be raised and lowered and freely rotated in the horizontal direction, and at the same time, is fixed to an arbitrary position.

A scale 10 having a scale is provided on the holding plate 6 of the main body support mechanism 4 so that the scale 10 can be rolled up. In the present embodiment, a steel tape measure 11 is used as the scale body of the scale 10. Reference numeral 11A indicates a scale feeding mechanism for adjusting the feeding amount and the rewinding amount of the scale 10. The scale feeding mechanism 11A is of an arm rotation type and may be of a type with a brake or a type without a brake, but in the present embodiment, a type without a brake is used.

Further, the main body support mechanism 4 is equipped with a scale delivery guide mechanism 12 for setting the delivery direction of the scale 10 to the illumination direction of the illumination means 1 described above.

In this case, the scale 10 has the above-described video camera 2 so that the section of the scale-out portion is projected downward by the action of the scale-out guide mechanism 12.
It is extended toward the shooting direction of.

More specifically, the scale feed-out guide mechanism 12 is specifically mounted on the above-mentioned holding plate 6, and at the same time, at the lower portion of this holding plate 6 in FIG. The tape measure 11 is detachably attached with the scale storage portion projecting to the side opposite to the shooting direction of the video camera 2.

The scale delivery guide mechanism 12 is provided between the first guide roller portion 13 provided at the delivery tip of the scale 10 and between the first guide roller portion 13 and the steel tape measure 11 described above. A second guide that guides the direction of the payout direction of the scale 10 that is paid out from the above-described steel tape measure 11 toward the left in FIG. 1 (the direction changes to the left after going up from the lower side of FIG. 1).
And the guide roller portion 14 of FIG.

Further, in FIG. 1, between the second guide roller portion 14 and the above-mentioned steel tape measure 11, the steel tape measure 11 positioned below is guided to feed the scale 10 upward. A third guide roller portion 15 is provided.

Here, in each of the first and third guide roller portions 13 and 15 described above, one of the guide rollers 13A and 15A located on the upper side or the right side of FIG. It is composed of a barrel-shaped guide roller that bulges out. Further, the other guide rollers 13B and 15B located on the lower side of FIG. 1 or on the left side of the figure have a drum shape in which the diameter of the central portion is smaller than the diameter of both ends corresponding to the one guide roller 13A and 15A described above. It is composed of a guide roller.

As a result, when the scale 10 is smoothly fed upward from the steel tape measure 11 and is laterally extended, it is possible to arrange a concave state on the upper surface of the scale 10. The rigidity is strengthened so that the scale 10 can be extended substantially horizontally to the left in FIG.

In addition, the above-mentioned second guide roller portion 14
The two guide rollers 14A and 14B constituting the above are constituted by columnar guide rollers. In this case, the direction of the line segment connecting the axis of the rotation support shafts of the respective cylindrical guide rollers 14A and 14B is the bending angle of the above-described bent direction of the scale 10 (set to 90 ° in FIG. 1). The equipment position of the cylindrical guide rollers 14A and 14B is specified so as to be located on the bisector of the above, whereby the feeding direction of the scale 10 is smoothly changed.

Here, the first guide roller portion 1 described above is used.
One of the three guide rollers 13A is provided with a reverse rotation preventing function (not shown) that allows only rotation in the feeding direction. The other guide roller 13B has a structure in which it is constantly pressed against the one guide roller 13A side described above by a spring or the like (that is, a scale pinching function is added). In this case, by forming each of the guide rollers 13A and 13B on one side and the guide roller 13B on the other side with a rubber member or the like and applying an appropriate initial load between them in advance,
The pressing member such as a spring may be omitted.

As a result, when the scale 10 fed from the steel tape measure 11 releases the feeding force,
The reverse rotation prevention mechanism and the scale pinching function of the first guide roller portion 13 make it possible to maintain the unrolled state.

Further, the holding plate 5 described above is fitted with the head cover 20 on the entire upper side thereof in a state where the video camera 2 and the illumination means 1 are mounted. The head cover 20 has a window portion for the video camera 2 and the illuminating means 1, an air hole is provided around the upper end portion, and is detachably attached to the holding plate 5 described above.

Further, the apparatus shown in FIGS. 1 to 3 is mounted on, for example, the crane 102 of the mobile crane 101, and as shown in FIG. 5, it is inserted into an inspection hole 201 such as a tunnel ceiling 200 formed in advance. Then, the image is taken and the size of the cavity 202 on the back side is measured. Then, the video information captured by the video camera 2 is subjected to signal processing by the signal processing unit 30 and recorded in the recording unit 31, and simultaneously displayed in real time on the display unit 32 such as a video monitor. (See Figure 4). Further, in the above embodiment, the holding plate 6 of the main body support mechanism 4 and the like are equipped with the microphone 20 as shown in FIG. 3 (not shown). Therefore, when the measurement worker inputs voice inputs indicating the measurement conditions such as the direction at the same time, the signal is processed by the signal processing unit 30 and recorded in the recording unit 31 at the same time as in the case of the video information. Display unit 32 such as a video monitor
It is designed to output audio in real time.

Next, the operation of the above embodiment will be described.

First, after pulling out the scale 10 drawn out from the steel tape measure 11 to the extent shown in FIG. 1, the entire apparatus is set to the operating state and the video camera 2 portion is tunneled as shown in FIG. 3 or 5. Inspection hole 2 on ceiling 200
Insert in 01. Then, the video camera 2 inserted in the cavity 202 photographs the inside of the cavity 202 illuminated by the illumination means 1 located on both sides, and the image thereof is displayed on the video monitor 32 in real time and simultaneously recorded by the recording unit. To be done.

On the other hand, when measuring the size of the cavity 202, the scale 10 is immediately rotated by rotating the scale feeding mechanism 11A of the steel tape measure (scale body) 11.
Roll out within 2. This situation is also continuously shot by a video camera. When the scale 10 is extended, the up-and-down direction setting wire 5C is expanded and contracted. That is, the up-and-down direction setting wire 5 is resisted against the tensile force of the tension spring 5B.
By loosening or pulling C, the part of the video camera 2 is raised and lowered.

As a result, the vertical direction of the scale 10 in the extending direction is adjusted and the cross section of the scale 10 is recessed upward, so that the scale 10 is maintained in the extended state due to its rigidity. Is measured relatively deep. In addition, when the scale 10 cannot maintain a linear state in the lateral direction in the air by its own weight, the scale 10 can be extended along the back surface of the ceiling of the tunnel.

When measuring the depth of the inside of the cavity 202, for example, after operating the scale feeding mechanism 11A of the steel tape measure 11 in the winding direction, the pedestal 7 and the column portion 8 shown in FIG. 3 are operated. Then, the direction is changed in the horizontal direction in the same manner as in normal photographing, and the above-described operation is repeated again. This measures the depth of the entire perimeter within the cavity 202. At the same time, video information of the entire inside of the cavity 202 and audio information such as measurement conditions are also recorded.

Here, in the above embodiment, the first guide roller portion 13 is provided with a scale pinching function of pinching the scale 10 in a state where the scale 10 is pressed from both sides, and only rotation in the feeding direction is allowed. Although the case where the reverse rotation prevention function is added is illustrated, the functions may be provided in the second guide roller portion 14 or the third guide roller portion 15 instead of the first guide roller portion 13.

Regarding the scale pinching function and the reverse rotation preventing function provided in any of the above-mentioned first to third guide roller portions 13 to 15, the above-mentioned steel tape measure (scale body) 11 has the above-mentioned scale. It is not necessary when the feeding mechanism 11A has a brake.

Further, in the above-mentioned embodiment, the case where the cavity behind the wall of the tunnel is measured has been described, but the same applies to the measurement of the underfloor of the building, the back of the ceiling, or the depth of other buildings. Can be applied to.

[0043]

Since the present invention is constructed and functions as described above, according to the present invention, it is possible to effectively photograph the entire cavity created on the back side of the wall of a tunnel or the like, or the entire space such as the floor or ceiling of a building. In addition, the size of the cavity or space can be quantitatively measured, and the scale can be projected while watching the video information, so that the work can be performed more quickly and accurately. Therefore, it is possible to provide an unprecedented excellent cavity measuring device that can obtain a reliable measured value in this respect.

[Brief description of drawings]

FIG. 1 is a partially omitted front view showing an embodiment of the present invention.

FIG. 2 is a left side view of FIG. 1 with a part omitted.

FIG. 3 is a partially omitted explanatory view showing an entire operation state and an operation state of the embodiment shown in FIG.

FIG. 4 is a schematic block diagram showing an electric system of the embodiment shown in FIG.

FIG. 5 is an explanatory diagram showing a case where the embodiment shown in FIG. 1 is mounted on a mobile crane and is being measured.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lighting means 2 Video camera 4 Main body support mechanism 5 Holding plate 6 Holding plate 7 Pedestal 10 Scale 11 Steel tape measure as a scale main body 12 Scale feeding guide mechanism 13 First guide roller part 13A One guide roller 13B The other guide roller 14 Second Guide Roller Part 200 Tunnel Ceiling 201 Inspection Hole 202 Cavity

Claims (5)

[Claims] 1. An illuminating means for illuminating a measurement direction in a cavity, a video camera provided in the vicinity of the illuminating means for photographing the illuminating area, and a holding plate for holding the video camera and the illuminating means. The main body support mechanism for inserting the video camera and the illumination means into a predetermined cavity through the holding plate, and the main body support mechanism is equipped with a scale main body accommodating a scale having a scale. A cavity measuring device equipped with a scale feeding guide mechanism for setting the scale feeding direction to the illumination direction of the illumination means. 2. The main body support mechanism is configured to include a holding plate that holds the holding plate so that the holding plate can be raised and lowered, and a support portion that holds the holding plate on a pedestal. Item 1. The cavity measuring device according to item 1. 3. A first guide roller unit equipped with the scale delivery guide mechanism on a delivery side of the scale with respect to the outside, and a first guide roller unit provided between the first guide roller unit and the scale main body. A scale including two guide roller portions, and the scale is sandwiched by either one of the first guide roller portion and the second guide roller portion while the scale is pressed from both sides. The cavity measuring device according to claim 1 or 2, wherein a holding function is added, and a reverse rotation preventing function that allows only rotation in a feeding direction is added. 4. One of the first guide roller portions, which is positioned on the upper side of the first guide roller portion, is constituted by a barrel-shaped guide roller whose central portion is bulged as a whole, and the other of which is positioned on the lower side. 4. The guide roller is constituted by a drum-shaped guide roller having a central portion having a diameter smaller than that of both end portions, corresponding to the barrel-shaped guide roller.
The cavity measuring device described. 5. The cavity measuring device according to claim 1, 2, 3, or 4, wherein the scale feeding-out guide mechanism is provided in a holding plate portion of the main body support mechanism.