JPH08101002A - Method for measuring thickness of backer, sealing material, etc. - Google Patents

Abstract

PURPOSE: To easily and visually discriminate the thickness of a backer before putting a sealing material on the backer by changing the colors of backers in accordance with their thicknesses so that their thicknesses can be discriminated from their colors. CONSTITUTION: Platy backers (laying materials) 10 composed of porous polyethylene are colored in different colors in accordance with their thicknesses so that their thicknesses can be discriminated from their colors. For example, a backer 10 having a thickness of 2mm is colored in red and another backer 10 having a thickness of 4mm is colored in yellow. A third backer 10 having a thickness of 6mm is colored in green. Therefore, when a construction supervisor, etc., visually checks the color of a backer 10 laid in a joint, he can effectively prevent improper construction work, because he can recognize the thickness of the backer 10 at a glance and can confirm whether or not the backer is suitable for the depth of the joint.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backer for laying a joint and a method for measuring the wall thickness of a sealing material or the like.
More specifically, by visually identifying the wall thickness of the backer laid in the lower layer of the sealing material filled in the joint groove of the building structure before filling the sealing material, a backer with an appropriate thickness is used. The present invention relates to a backer for laying in a joint, which enables easy and sure recognition of the presence of a sword. The present invention also relates to a method and apparatus for measuring the thickness of the soft coating film on the sealing material on the backer or the laying material laminated on the base.

[0002]

2. Description of the Related Art In a building structure made of reinforced concrete, a porous structure (sponge-like) is formed on the inner bottom surface of a groove forming a joint for waterproofing a joint formed between joints between concrete units or between tiles. Often, a waterproof structure is used in which a polyethylene thin plate material is laid and then a sealing material is filled and solidified. A similar waterproof structure is also used for joints formed at the joints between the two mold members that form the sash.

FIG. 11A is a sectional view showing a waterproof structure of concrete joints, and FIG. 11B is a sectional view showing a waterproof structure of joints of joints such as sashes. The joint 2 formed in the concrete portion 1 in (a) has a concave structure, and prevents water leakage when a crack 3 as shown in the figure is formed in the concrete portion on the inner bottom surface side of the joint 2. Therefore, after the backer 4 made of a porous thin plate material such as polyethylene is laid on the inner bottom surface of the joint 2, the backer 4 is
Waterproofing is performed by filling a paste-like sealing material 5 made of an elastic resin or the like on top and then solidifying it. Since the backer 4 is not constrained not only from the concrete part constituting the inner wall of the joint groove but also from the sealing material 5, the left and right parts of the crack 3 are relatively moved due to a temperature change, a vibration such as an earthquake, or a shock. It is possible to flexibly follow the deviation together with the sealing material when the deviation occurs.

FIG. 11 (b) shows a waterproof structure in which joints 2 formed at the joints of two sashes 6 are movably connected to each other, and here again, porous polyethylene or the like is used. The backer 4 made of a thin plate material is laid on the inner bottom surface of the joint 2, and then the sealing material 5 is filled and solidified on the backer 4. Also in this case, since the backer 4 is free from the inner wall of the sash and the sealing material, it is possible to maintain the waterproof structure by following the deviation of both sashes caused by the temperature change, vibration, and shock.

By the way, the volume ratio of the sealing material filled in the joint to the backer needs to be a certain value or more depending on the relationship between the width and the depth of the joint. For example, in the case of FIG. 11 (a). As described above, when the joint width is 20 mm and the depth is 15 mm, the sealing material 5 needs to have a minimum wall thickness of 10 mm. If the backer 4 becomes thicker and the amount of the sealing material decreases, There will be problems with sealing effect and durability. In the case of joints having a width of 30 mm and a depth of 25 mm, the thickness of the backer is 10
mm, and the thickness of the sealing material is preferably about 15 mm.

Further, when the depth (30 mm) is larger than the width (15 mm) as in the joint shown in FIG. 11 (b), the backer is made thicker to about 15 mm and used as a sealing material. It does not matter even if the thickness is the same. In an actual construction site, it is important to properly select the wall thickness of the backer to be laid inside the joint in order to secure the ideal filling amount of the sealing material as described above. If this is used, a waterproof structure with optimal joints can be realized simply by filling the sealing material.

However, in the actual construction, it is the fact that the quality of the waterproofing contractor has a great influence on the construction result, and depending on the contractor, the amount of the sealing material used is reduced to the allowable amount or less. In order to obtain an unreasonable profit, a backer having an excessively large thickness may be intentionally used (so-called raised bottom). Moreover, the color of the conventional backer is all gray, and it is difficult to know the thickness of the backer only by visually observing the appearance once the backer is laid inside the joint. In particular, once the sealing material has been filled, the sealing material and part of the backer are removed by sampling with a cutter to achieve the actual wall thickness, and there is no method for determining the appropriateness of the filling amount of the sealing material. However, this method has a problem that it takes a lot of time and labor to repair it because it destroys the waterproof structure, and improvement in this respect has been strongly desired.

The above problems also occur in a waterproof structure in which a waterproof coating film such as a urethane waterproof material is laminated on a laying material laid on the lower ground of concrete or the like. Therefore, it is strongly desired to develop a method capable of easily and reliably measuring the wall thickness of the waterproof coating film.

An ultrasonic thickness gauge (UKM-1200) manufactured and sold by Teitsu Denshi Kenkyusho Co., Ltd. is known as a non-destructive device for measuring the thickness of the sealing material. According to the measuring instrument, it is possible to measure in units of 0.1 mm by a measuring method using ultrasonic waves. That is, the measuring method using this thickness meter measures the transmission echo to the bottom echo by the one-contact method. If this measuring device is used, the wall thickness of the sealing material or the like can be easily measured, but since the cost of the device itself is high, the measuring device of the above-mentioned example is useful for performing the measurement easily and at low cost. is there. In addition, this ultrasonic measurement method does not cause a problem in measurement accuracy if the film to be measured is a one-component material such as a modified silicon-based material, a silicon-based material, or a polyurethane-based material, but a two-component material. In the case of (1), since bubbles are likely to remain inside the film thickness and complete defoaming is difficult, there is a high possibility that the bubbles may interfere with accurate measurement.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and in a joint sealing structure in which a sealing material is filled on a backer laid on the bottom surface of the joint groove, the wall thickness of the backer before the sealing material is filled. It is an object of the present invention to provide a backer capable of easily identifying and determining by visually observing the appearance. Another object of the present invention is to provide a measuring method capable of measuring the wall thickness of the sealing material easily, reliably and nondestructively even after the sealing material is filled.

Further, according to the present invention, in a waterproof structure in which a waterproof coating film such as a urethane waterproof material is laminated on a laying material laid on a lower ground such as concrete, the thickness of the waterproof coating film can be easily, reliably and non-uniformly. It is an object of the present invention to provide a measuring method capable of measuring by the destruction method. Furthermore, even when foreign matter such as bubbles is present within the film thickness of the sealing material or waterproof coating as the measurement object, the film thickness can be accurately and reliably measured without being hindered by the presence of the foreign matter. It is an object of the present invention to provide a measuring device and method capable of performing the measurement.

[0012]

To achieve the above object, the first invention of the present application is to provide a joint sealing structure in which a sealing material is filled on a backer laid on the inner bottom surface of a joint groove, and the backer is made thicker than that. According to the different colors, the thickness of the backer can be identified by the color, and in the joint sealing structure in which the sealing material is filled on the backer laid on the inner bottom surface of the joint groove, the upper surface of the backer. It is characterized in that a conductive region is provided at an appropriate position, and a wall thickness of the sealing material is measured by measuring a distance from an upper surface of the sealing material corresponding to a position where the conductive region is formed to the conductive region.

A second aspect of the present invention is a joint sealing structure in which a sealing material is filled on a backer laid on the inner bottom surface of a joint groove, and a conductive region is provided at an appropriate position on the upper surface of the backer, and the conductive region is formed. A device for calculating and measuring the wall thickness of the sealing material by measuring the distance from the sealing material upper surface corresponding to the position to the conductive region, wherein the measuring device has a shape that can be easily grasped by a human hand. A main body, a needle for conduction detection which is supported so as to be capable of protruding from the tip of the main body, an operating portion for allowing the needle to protrude and enter, a display means for displaying the protruding length of the needle, and the needle A conduction detecting circuit that conducts through the conductive region and the needle when the tip of the penetrating the sealing material reaches the conductive region, and a conduction display unit that operates by conduction of the conduction detecting circuit. Characterized by It is.

A third aspect of the present invention is a protective structure in which a soft coating film is laminated on a laying material laid on a base, and a conductive area is provided at an appropriate place on the upper surface of the laying material, and the conductive area is formed at a position where the conductive area is formed. By measuring the wall thickness of the laying material by measuring the distance from the upper surface of the corresponding soft coating to the conductive area, in a protective structure formed by laminating the soft coating on the laying material laid on the underlayer. The upper surface of the laying material is provided with a conductive region, and the wall thickness of the soft coating film is calculated by measuring the distance from the upper surface of the soft coating film corresponding to the formation position of the conductive region to the conductive region. The measuring device includes a main body having a shape that can be easily grasped by human hands, a continuity detection needle supported so as to be capable of protruding from the tip of the main body, and the needle is inserted into the measuring device. The operating part and the protruding length of the needle The display means shown, a conduction detection circuit that conducts through the conductive region and the needle when the tip of the needle penetrates the soft coating film and reaches the conductive region, and operates by conduction of the conduction detection circuit. And a continuity display means for performing the operation.

According to a fourth aspect of the present invention, a base portion having a shape that can be easily grasped by a human hand, a screw rod protruding from a tip end portion of the base portion, and a continuity detection needle fixed to the tip end of the screw rod, A hollow cylindrical movable part that advances and retreats in the axial direction by being screwed onto the outer periphery of the screw rod, a projection length display means for displaying the projection length of the needle, and a tip when the needle is in conduction. The present invention is characterized by including a continuity detecting circuit that conducts, and a continuity display unit that operates by continuity of the continuity detecting circuit.

A fifth aspect of the invention is when the electrical resistance values of the backer and the sealing material, or the electrical resistance values of the laying material and the soft coating film have a large difference exceeding a predetermined value. It is characterized in that the depth of the interface is measured by detecting the electric resistance value at the interface between the materials or the weak current flowing therethrough.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the preferred embodiments shown in the accompanying drawings. FIG. 1 is a perspective view showing the configuration of the backer of the present invention, in which each plate-shaped backer (laying material) 10 made of porous polyethylene is colored in a different color depending on its thickness, The feature is that it is configured so that the difference in wall thickness can be discriminated from the appearance. That is, for example, the backer having a thickness of 2 mm is red, the backer having a thickness of 4 mm is yellow, the backer having a thickness of 6 mm is green, the backer having a thickness of 8 mm is blue, and so on.

One of the merits of color-coding the conventional gray-colored backers according to the wall thickness is that the backers laid in the joints can be visually observed by the site supervisor or the like at a glance. That is, it is possible to confirm whether or not the backer is suitable for the groove depth of the joint by recognizing the wall thickness. Further, for the construction worker, the conventional gray solid color backer is not easy for the wall thickness determination work, and a backer with an incorrect wall thickness is often laid, but according to the backer of the present invention, Since the thickness of the backer can be determined at a glance based on the difference in, it is also an advantage that the backer can be selected correctly. Therefore, the work orderer can effectively prevent unreasonable work due to the so-called raised bottom by forcing the work contractor to use the backers of different colors.

By the way, the contractor of the construction work and the contractor who receives the order and lays the backer and fills the sealing material with each other have concluded a contract under a certain relationship of trust. Although it is unlikely that a situation willingly be undertaken to raise the bottom construction after forcing the use of color-based backers, there is a deterrent power to detect the bottom construction by a more vicious contractor or prevent it. In order to do so, it is effective to measure the wall thickness of the sealing material after the completion of construction.

However, as described above, conventionally, the method of measuring the wall thickness after cutting off a part of the sealing material has been the main, so that the labor required for repairing the above-mentioned cut place is a heavy burden on the contractor, and the construction period. It not only prolongs the production cost but also hinders cost reduction. It is also considered that it is effective to perform measurement based on the piercing depth of the needle by piercing an object such as a thin needle from the surface of the sealing material toward the inside, but since the backer is soft, Such a method is not practical because it is impossible to determine the boundary between the schilling material and the backer only by the feel of the needle when it is pierced, and to know accurately that the tip of the needle has reached the upper surface of the backer.

From such a point, the present inventor accurately measures the thickness of the sealing material by the non-destructive method without cutting the sealing material to cause the need for repairing, and performs the unreasonable raised bottom construction. We have developed a measuring device and a measuring method that can be discovered and prevented.

2 (a), (b) and (c) are an external view, a sectional view and a continuity detecting circuit showing an example of a thickness measuring device for a sealing material or the like according to the present invention. For example, it is provided with a shape and dimensions such as a mechanical pencil or a ballpoint pen. The measuring device 20 includes a hollow cylindrical main body 21 having a shape that can be easily grasped by human hands.
A needle 22 for detecting conduction, which is supported so as to project from the tip of the main body 21, an operating section 23 for projecting and inserting the needle 22, and a display means 24 for displaying the projecting length of the needle 22.
And a conduction detection circuit 25 that conducts through the conductive region and the needle when the tip of the needle 22 reaches the conductive region through the sealing material, and an LED that operates by conduction of the conduction detection circuit 25. And the like, and a battery 27 and the like.

The main body 21 is a hollow cylindrical body made of an insulating material such as plastic, and has a hole 30 for allowing the needle 22 to project therein, which is formed by a packing made of rubber or the like (not shown). Waterproof inside and outside the body. Also,
The front surface of the main body is set to have a small area and a flat shape so as to enter the joint groove having a width of 10 mm or less and to be in close contact with the upper surface of the sealing material. The slit-shaped long hole 31 formed in the proper position of the main body 21 is a guide hole for advancing and retracting the one end 23a of the operation portion 23 in the axial direction of the main body in a state where the one end (operation end portion) 23a is projected, At the edge portion, the depth indicating portion 24 is formed along the longitudinal direction by a scale. The operation end 23a is not only operated by the user's finger, but also has an index indicating the scale of the depth display section 24.
Reference numeral 32 is a hook for locking the apparatus to the edge of a user's pocket or the like, 33 is a lid attached to and detached from the upper end opening of the main body 21, and the battery 27 is stored in the battery storage portion 34 in the opening. It

The operating portion 23 has a structure in which, for example, one end 23a projects outward from the elongated hole 31, and a portion 23b located inside is integrated with the needle 22. The inner portion 23b of the operating portion is integrated with the needle 22 via the sliding block 40, for example. The sliding block 40 has, for example, a spline groove formed on the inner wall of the main body 21 and fitted in an axially extending spline groove on the outer peripheral surface thereof, so that it can be accurately advanced and retracted along the axial direction of the main body. Has been done.
Further, the needle 22 is integrally (or detachably and replaceably) projected on the tip end surface of the sliding block 40. Further, the sliding block 40 is constantly urged by the spring 41 in the direction in which the needle 22 is retracted, and when no force is applied to the operating portion 23 in the pushing direction, the tip of the needle 22 is placed in the main body. A stopper 43 is provided on the inner wall of the main body so as to be located at the initial position on the same plane as the tip surface of 21. When the tip of the needle 22 is flush with the tip surface of the main body 21, the index provided at the one end 23 a of the operating portion 23 is “0” on the scale 24.
Pointing to the position.

The needle 22 has, for example, as shown in the circuit diagram of FIG. 2C, two elongated electrodes 50 having at least one flat surface.
The flat surfaces of a and 50b are bonded to each other with the insulating layer 51 interposed therebetween to form a needle-like shape having a small diameter that easily pierces the sealing material as a whole. The base ends of the electrodes 50a and 50b are connected to the lead wires 52 inside the sliding block 40, respectively.
a, 52b, and a continuity display means 26 such as an LED and a battery 27 are connected in series. Then, as will be described later, when the tips of the electrodes 50a and 50b reach the conductive area 57 arranged at the boundary between the sealing material and the upper surface of the backer, the circuit is turned on and the continuity display means 26 is turned on. Configure. Further, when the tips of the electrodes 50a and 50b penetrate the conductive region 57 and enter the backer, the needle outer peripheral surface excluding the tip of the needle is covered with an insulating film 53 in order to cancel the conduction. It may be formed (FIG. 3A).

Further, as shown in FIG. 3B, the insulating layer 52b, the second electrode 52c and the insulating layer 52d may be sequentially laminated on the outer peripheral surface of the first electrode 52a located at the center. A power switch for turning on / off the power of the measuring device itself may be provided at an appropriate place on the main body 21. The needles 22 may be composed of two independent needles in advance. In this case, since each needle is fixed to the tip surface of the sliding block as an independent electrode, the insulating layer as in the above embodiment is used. It is not necessary to have a needle configuration with. In this case, the two needles may have the same length or different lengths.

For electrical connection between the needle 22 and the battery 27, for example, the sliding contact 40a provided on the outer peripheral surface of the sliding block 40 is slid with the electrode 21a connected to the battery terminal and extending along the inner wall of the main body 21. It is realized by connecting them physically. For waterproofing, the long hole 31 is closed by a packing, and the operation end portion 23a is configured to protrude to the outside through a notch formed in the packing in the longitudinal direction.

In the present invention, on the premise that the above-mentioned measuring device 20 is used, a conductive region having a width of about 2 to 3 cm is formed in an appropriate place on the upper surface of the backer (for example, the central portion in the longitudinal direction), and the sealing material is formed. When the tip of the needle 22 penetrating the needle contacts the conductive area 57, both electrodes 50a, 50b
However, the step of forming the conductive region 57 in the backer used for implementing the device of the present invention is extremely easy. That is, as shown in FIG. 4, the backer is manufactured by cutting a 1 mm square plate material 55 having a predetermined thickness into narrow strip-shaped unit backers 56 having a predetermined width, but forming a conductive region 57. In order to do so, a commercially available aluminum tape may be attached to the upper surface of the plate material 55 before cutting, or a conductive paint may be applied, and this may be cut later into a unit backer 56 of a predetermined width. Good.

By the way, after the sealing material 58 is laminated on the backer 56 laid in the joint groove, a method for finding the position of the conductive area is to use a commercially available inexpensive metal detector (for example, Prosec Corporation in Switzerland). Mini search etc.) may be used, and the needle of the measuring device 20 may be inserted after the position of the conductive region is specified. The through hole of the sealing material, which should remain after the needle is pulled out, is easily closed by the elasticity of the sealing material by making the needle extremely small in diameter.

Next, the measuring device 20 of the present invention will be described with reference to FIG.
A method of measuring the depth of the sealing material 58 by means of will be described. First, the measuring device before starting the measurement uses the spring 41 to move the needle 22, the sliding block 40, and the operating portion 23.
Is in an initial state in which it is biased in the retracting direction, and in this initial state, the slide block 40 contacts the stopper 43, so that the tip of the needle 22 is retracted to a position flush with the tip surface of the main body 1. are doing. At this time, the operation unit 23
One end 23a of the mark indicates a portion indicating "0" in the scale constituting the depth display portion 24.

Using this measuring device 20, the sealing material 5
When measuring the wall thickness of No. 8, first, the tip end surface of the main body 21 is closely contacted and abutted on the upper surface of the sealing material 58 corresponding to the formation position of the conductive region 57 specified in advance by using the metal detector. Then, in this state, the operator gradually presses the operating end 23a of the device 20 gripped by the finger in the pushing direction.
In this extrusion process, the needle 22 is gradually inserted from the upper surface of the sealing material 58 to the inside, and when the respective tip portions of the two electrodes 50a and 50b forming the needle come into contact with the conductive region 57, the conduction detecting circuit. 25 is conducted, and the continuity display means 26 is turned on. When the pushing of the operation end 23a is stopped at the time when the continuity display means 26 is turned on, the end 2 is stopped.
An index such as an arrow provided on 3a indicates the scale of the depth display portion 24, and the displayed scale indicates the insertion depth of the needle, that is, the depth of the sealing material 58.

If the position of the operating end portion 23a can be locked when the continuity display means 26 is turned on, after the needle is pulled out from the sealing material 58, the device itself can be brought close to the eye for easy viewing. It is convenient because you can see the scale with. As a method of locking the operation end portion 23a, a spring, a tape or other means is wound around the main body 21 and attached thereto, and at the same time, these are operated.
It is sufficient to prevent the scale from returning to the "0" side by hooking it on a. As another example of the locking method, like a commercially available cutter configured to be able to expand and contract the length of the blade by pushing the blade with a finger, positioning of the protruding position of the blade is performed in millimeter increments provided on the holder side. The step (step) may be performed by engaging a spring stopper provided on the blade side with respect to the recess (or the projection).

Alternatively, the spring 41 is omitted, and the outer surface of the sliding block 40 or the inner wall of the measuring device main body 21 is entirely or partially made of an elastic material, and the sliding block 40 is pressed against the inner wall. If it is configured to hold, the position of the sliding block, that is, the protruding length of the needle does not change unless the operating end is operated in the pushing or pulling direction, so that the locking means may be unnecessary. Further, even if no special locking means is provided, if the camera shows a state in which the index provided at the operating end point indicates the scale at the time when the needle tip reaches the conduction area and the conduction display means 26 lights up, it is recorded. Can be ensured.

Next, as another measuring method using the above-mentioned measuring device 20, the protruding length of the needle 22 from the tip of the device main body 21 is previously determined to be a regular depth d from the upper surface of the sealing material 58 to the conductive region 57. There is a method of fixing the same as or a little shorter. When the protruding length of the needle is set to be equal to the regular depth d, the sealing material 5 is embedded so that the entire needle 22 protruding from the tip of the apparatus body 21 is embedded.
When it is inserted into the housing 8, the continuity display means 26 is turned on, which reveals that the sealing material 58 has a regular thickness. Further, when the protruding length of the needle is set to be slightly shorter than the regular depth d, when the needle 22 is inserted into the sealing material so as to be buried, the continuity display means 26 is provided.
When is lit, it is found that the thickness of the sealing material is too thin than the regular thickness.

When the measuring method for fixing the protruding length of the needle is carried out by using the measuring device 20 shown in FIG. 2, the scale 24 is used.
With the clue as a clue, the protrusion length of the needle may be adjusted to be equal to or slightly shorter than the regular wall thickness d of the sealing material to be measured, and then the needle may be fixed with the protrusion length. .

Next, FIGS. 6 (a) and 6 (b) are other embodiments of the present invention, which are an explanatory view of a usage state and an equivalent circuit diagram of an example of a measuring device of a type using two needles. . The measuring device 20 in this embodiment has a needle 6 on the main body 21 side and a needle 6 on the outside of the main body.
The needles 60 and 61 are independent positive and negative electrodes, respectively.
Further, the internal configuration of the main body 21 includes a sliding block, a battery, an operating section, a depth display section, a continuity display means, and a continuity detection circuit, as in the embodiment of FIG. The separate needle 61 may be detachably attached to a locking portion or the like provided at a proper position of the main body 21.

With this measuring device 20, the sealing material 5
When measuring the wall thickness of No. 8, the needle 61, which is separate from the main body, is inserted deeply toward the conduction region 57, and then the needle of the main body 21 is placed at a position close to the insertion position of the needle 61. Insert 60 gradually so as to be orthogonal to the upper surface of the sealing material.
When the tip of the needle 60 of the main body reaches the conduction region 57, the continuity display means 26 is turned on, so that insertion of the needle can be stopped and the scale can be read at this time.

According to this measuring device, the insertion by the separate needle 61 can be performed relatively roughly at the deep position, and by inserting this into the deep position, the needle 61 can be surely conducted.
Since the measurement is performed with the needle 60 of the main body in a state of being in contact with 7, it is not necessary to make the structure of the needle 60 complicated as shown in FIG. 3, and the needle 60 made of a conductor material having an integral structure can be used. It is also advantageous in terms of cost. Contrary to the above, the needle 60 on the main body side is roughly inserted first, and then the separate needle 61 is inserted, and when the continuity display means 26 is turned on, the scale formed on the separate needle 61. May be read. Further, in any of the above embodiments, the whole or a part of the main body 21 is made of a transparent material, and the scale provided on the transparent portion of the main body 21 is indicated by an index provided on a sliding block or the like inside the main body. You may comprise.

Unlike the above embodiment, the needle is fixedly projected on the tip end surface of the pencil-shaped main body, the continuity detection circuit similar to the above is provided, and the needle has a scale indicating the depth. Alternatively, the depth may be known by reading the scale formed on the needle when the needle is inserted into the sealing material and the continuity display means is turned on. Further, as a means for pushing out the needle when the needle is configured to be able to advance and retreat from the main body,
In addition to the configuration shown in FIG. 2, a mechanical pencil knock mechanism may be used. Further, as described in the first embodiment, a measuring method may be adopted in which the protruding length of the needle tip is fixed to be equal to or slightly shorter than the regular wall thickness of the sealing material.

Further, as shown in FIG. 7, the measuring device main body may be shaped like an injector used in the medical industry. In this case, a brim 71 for locking the index finger and the middle finger is provided on the upper part of the measuring device main body 70, the upper end of the sliding block 72 is made to project from the upper end opening of the main body, and this sliding block is held by the thumb. The needle 22 at the tip of the sliding block may be pushed out by pushing in the upper end of the.

In this case, the scale is provided along the slit 73 provided on the side surface of the main body as in the embodiment of FIG. 2, and the index 72a protruding from the side surface of the sliding block 72 is projected outside from the slit. May be used to indicate the scale, or the scale may be formed on the needle 22 itself. Alternatively, the syringe-type main body may be made of a transparent material, and the protruding length of the needle may be known from the position where the index provided on the sliding block indicates the scale provided on the main body side.
The battery 27 may be configured to be housed in an internal space by removing the lid 33 at the upper end of the sliding block 72. In this case, since the sliding block itself is equipped with a battery, it is not necessary to provide a sliding contact as in the embodiment of FIG. 2, and as a result, the configuration is simplified, and the outer peripheral surface of the sliding block and the main body are It becomes easy to obtain a pressure contact state with the inner peripheral surface. The power switch may be provided on the upper surface of the lid 33 or the like.

Further, in the above embodiment, the pen-shaped main body is provided with the measuring needle, but it is not necessary to have the pen-shaped in order to measure a position other than the narrow joint groove. Therefore, a large-sized main body (for example, a box shape) which can be easily grasped and has high installation stability on the surface of the sealing material (that is, a large area of the tip surface supporting the needle)

FIG. 8 is a diagram showing an example of the construction of a measuring device dedicated to the implementation of the above-described measuring method in which the protruding length of the needle tip is fixed. The measuring device 60 includes a main body 61 having one or two needles 62 at its tip, and a hollow cylindrical movable part 64 that is assembled by screwing a screw rod 63B at the tip of the main body 61 so as to be able to advance and retreat in the axial direction. And so on. The body 61 is a base 63
A and the screw rod 63B are integrally configured. The base 63A has a space 66 for accommodating the battery 65 therein, and a continuity display means 67 which is a lamp for indicating the continuity of the needle 62. The two needles 62 and both electrodes of the battery are connected by lead wires (not shown), respectively, and when the two needles come into contact with the conductive area on the backer, they are electrically connected and the continuity display means 67 is turned on. . Figure 3 (a) shows the needle configuration
A single needle may be used as in (b).

In the above structure, when adjusting the protruding length of the needle 62, the movable portion 64, which is screwed by the screw portion on the outer periphery of the screw rod 63B and the screw portion on the inner wall, may be rotated. In order to position and fix the movable portion 64, the movable portion 64 may be constantly urged in the protruding direction by a spring (not shown).

Various methods can be considered for knowing the protruding length of the needle in this measuring device. For example, when the movable portion 64 is at the reference position shown by the dotted line (the position where the leading edge of the movable portion coincides with the needle tip). A scale of "O" is formed on the outer peripheral surface of the screw rod corresponding to the position of the upper end edge 64 'of the movable part, and a scale indicating an upward movement distance as the movable part moves upward from the reference position. And numbers are formed on the outer peripheral surface of the screw rod. The number on the scale with which the upper edge 64 'of the movable portion overlaps indicates the protruding length of the needle. In addition, the front part or part of the movable part is made transparent, and an index is written in an appropriate place (a part other than the upper edge) of the movable part so that the position of the scale pointed by this index is the protruding length of the needle. You may comprise. The structure for knowing the protruding length of the needle constitutes a protruding length display means.

Since this measuring device 60 is dedicated to the measuring direction in which the protruding length of the needle tip is fixed as described above, the thickness of the sealing material can be properly determined by performing the measurement according to the procedure described above. Can be determined.

In any of the measuring devices of the above-mentioned embodiments, it is necessary to detect the position of the conductive region with a metal detector after laminating the sealing material on the backer. If a mark indicating the position of the conduction region is provided near the gutter, the use of a metal detector can be omitted, which is convenient. FIG. 9 is an example for facilitating the above-mentioned position display by an easy operation. The conductive area 57 to be stuck on the backer is constituted by a conductive seal, and the upper surface or the lower surface (adhesion) of the conductive seal 57 is bonded. surface)
One end of the thread 75 is fastened to the end of the thread 75 with sufficient strength for attachment / detachment, and the other end of the thread 75 is a paper, resin sheet, cloth, or the like having an indication such as "there is a conductive sheet in the cono position". The position display means 76 is fixed. If the length of the thread 75 is set to a predetermined length or more, the position display means 7 can be used even after the sealing material is filled.
Since 6 can be led out to the outside of the joint groove, the position of the conductive sheet 57 can be easily and accurately known by using the position display means 76 as a mark. After the measurement is completed, the yarn 75 is removed by cutting or cutting. Alternatively, a tape indicating the presence of the conductive sheet may be attached to the edge of the joint on the backer laying site, or the display may be left with a paint or other writing means. In this way, the metal detector is not required, and the measurement workability can be improved.

The measuring device 20 of each of the above-described embodiments is applicable not only to the color-coded backer shown in FIG. 1 but also to the conventional wall thickness measurement of the sealing material on the backer of one color. Further, each of the above-mentioned measuring devices uses not only the sealing material for joints but also the urethane waterproofing in a waterproof coating structure in which a urethane waterproofing material (soft coating film) is laminated on the lower ground of concrete or the like through a glass cloth (laying material). It can also be applied to the measurement of wall thickness. In this case, a conductive area is arranged in an appropriate place on the upper surface of the glass cloth with an aluminum tape or the like, and the distance from the soft coating upper surface corresponding to the formation position of the conductive area to the conductive area is determined by the same method as described above. By measuring with, the wall thickness of the laying material can be calculated and measured.

Further, according to the wall thickness measuring apparatus and method of the present invention, it is possible to prevent the waterproofing contractor from knowing that the wall thickness of the sealing material or the like can be measured by the apparatus or the apparatus, thereby preventing the raised bottom construction. It will be clear that it will be a deterrent.

Next, in each of the above-mentioned embodiments, the explanation has been made on the assumption that the conductive region is formed on the backer (laying material) made of an insulating material. However, depending on the purpose of use of the building, the backer (laying material) may be used. It is known that a conductive material is used to secure a ground to release static electricity, or to eliminate noise that causes malfunction or malfunction of communication equipment. In such a case, since the backer or the like itself has conductivity (a material in which carbon powder is mixed in an insulating material, etc.), it is possible to use the above measuring device and method without forming a conductive region as described above. It is possible to measure the depth to the backer. In this case, it is not necessary to search the position of the conductive region, which is convenient.

It is possible that the conduction detecting circuit does not operate when the flow of current from the measuring device is poor and only a weak current flows because the conductivity of the conductive backer is low. In this case, the conductive sheet as described above may be stuck on the backer, or a resin such as plastic having a hardness that the needle tip of the measuring device cannot penetrate, or a metal sheet is stuck on the backer. If this is done, the depth to the upper surface of the backer (thickness of the sealing material) can be known by reading the scale on the depth display section when the needle tip cannot be inserted. That is, like the above-mentioned measuring devices, if a device having a scale indicating the insertion depth of the needle is used, even if electrical depth detection is impossible,
The depth of the sealing material can be known from the insertion depth of the needle.

In general, when detecting a weak current as described above, it is possible to electrically detect it by inserting an amplifier in the conduction detecting circuit.

Further, instead of making the backer and the laying material side conductive, the sealing material and the soft coating film side filled and laminated thereon may be made conductive.

By the way, in the above-mentioned embodiment, by forming a conductive region on the backer or imparting conductivity to the backer itself, the current flowing from the measuring device 20 side can be conducted, and the presence or absence of this current is determined. However, when an insulating material such as polyethylene is used as the backer, the needles 22, 60 of the measuring device 20 are provided on the upper surface of the backer.
A weak current flows on the backer surface at the time when the current is flown by piercing 61 and 62. Therefore, the electrical resistance value of the backer made of the insulating material and filling (attachment) on it
When the difference between the electrical resistance value of the sealing material (coating film) to be applied is sufficiently large, the needles 22, 60, 61, 62 of the measuring device pierced from the sealing material side reach the interface between them. At the time when the current is passed, the weak current or the resistance value (change thereof) can be measured.

That is, FIG. 10 is a circuit diagram of an example of a measuring device for measuring a weak current value or a resistance value at an interface between a backer as an insulating material and a sealing material (coating film). In this measuring device, a current detection circuit that detects a weak current or a resistance measurement circuit (switching circuit)
80 is provided, and when the needle 62 penetrates the sealing material (coating film) 58 and reaches the surface of the backer 56, the current flowing from the battery 81 to the needle 62 flows on the backer surface, so that the circuit 80 is energized and turned on. The current from the battery 81 to the LED drive 82,
83 is turned on. At this point, the depth of the sealing material or the like can be known by recognizing the needle stick depth by each of the methods described above. With this configuration, processing for backers (formation of conduction areas, etc.)
Is unnecessary, the thickness of the sealing material and the like can be accurately measured even in the construction using a backer that has been conventionally used, and cost increase can be prevented.

In the above, the circuit configuration shown is only an example, and any configuration capable of operating the display means such as the LED by operating by the weak current flowing on the backer surface is included in the present invention. Is. Although the configuration of two needles is illustrated as the configuration of the needle, this is also only an example, and all the measuring devices shown in each of the above-described examples are illustrated in FIG.
The embodiment of 0 is applicable. In addition, the electric resistance of the backer may be significantly smaller than that of the sealing material (coating film). In this case, the circuit 80 loses current when the needle tip reaches the interface (the resistance increases). Thing = current value has decreased) may be detected. In any case, this embodiment is applicable when the electric resistance value of two insulating materials contacting each other through the interface is remarkably large, and formation of a conductive region and provision of conductivity to a backer or a sealing material are unnecessary. .

[0057]

As described above, according to the present invention, in the joint sealing structure in which the sealing material is filled on the backer laid on the inner bottom surface of the joint groove, the backer is different in color depending on its thickness. In addition, since the thickness of the backer can be identified by the color, it is possible to prevent a situation in which a backer having an excessive thickness that is unsuitable for the joint is intentionally or mistakenly laid.

Further, the wall thickness of the backer is calculated and measured by measuring the distance from the upper surface of the sealing material corresponding to the formation position of the conductive area provided in a proper place on the upper surface of the backer to the conductive area. Therefore, the measurement can be performed at low cost. The measuring device used for carrying out this measuring method includes a main body having a shape that can be easily grasped by a human hand, a conduction detection needle supported so as to be capable of protruding from the tip end, and a needle for protruding the needle. Operation unit, display means for displaying the protruding length of the needle, and continuity detection for conducting through the conductive region and the needle when the tip of the needle reaches the conductive region through the sealing material. Since the circuit and the continuity display means that operates by the continuity of the continuity detection circuit are provided, it is possible to measure the wall thickness of the sealing material with sufficient accuracy while having a simple structure and low cost. The method and apparatus for measuring wall thickness can be applied not only to sealing materials but also to general soft coating films such as waterproof coating films. In addition, the resistance value of the insulating material or the weak current flowing therethrough is detected without using a method such as interposing a conductive region at the interface between the backer and the sealing material or imparting conductivity to either one. By providing the circuit configuration in the measuring device,
The depth of the interface position can be measured.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a color-coded backer of the present invention.

2 (a), (b), and (c) are an external perspective view, a cross-sectional view, and a configuration explanatory diagram of a continuity detection circuit showing a configuration of a wall thickness measuring apparatus of the present invention.

3A and 3B are enlarged views showing a configuration example of a needle tip portion.

FIG. 4 is a diagram showing a procedure for forming a conductive region on a backer.

FIG. 5 is a sectional view showing a measuring method by the device of the present invention.

6A and 6B are a configuration diagram and an equivalent circuit diagram of a measuring apparatus according to another embodiment of the present invention.

FIG. 7 is a sectional view showing the arrangement of a measuring apparatus according to another embodiment of the present invention.

FIG. 8 is a sectional view showing the configuration of a measuring apparatus according to another embodiment of the present invention.

FIG. 9 is a diagram showing an example for confirming the position of a conductive region.

FIG. 10 is a diagram showing a circuit configuration example of a measuring apparatus according to another embodiment of the present invention.

11 (a) and 11 (b) are views showing a conventional joint sealing structure.

[Explanation of symbols]

1 concrete part, 2 joints, 3 cracks, 4
Backer, 5 sealing material, 6 sash, 10 backer (laying material), 20 measuring device, 21 main body, 22
Needle, 23 operation part, 23a operation end part, 24 depth display part, 25 continuity detection circuit, 26 continuity display means, 27
Battery, 30 holes, 31 oblong holes, 32 hooks,
33 lid, 34 battery housing, 40 sliding block, 41 spring, 43 stopper, 50a 50b
Electrode, 51 insulating layer, 52a, 52b lead wire, 5
3 insulating layer, 55 plate material, 56 backer, 57 conductive area, 58 sealing material.

Claims (7)

[Claims] 1. A joint sealing structure comprising a backer laid on the inner bottom surface of a joint groove and a sealing material filled on the backer, wherein the backer has a different color depending on its thickness, and the thickness of the backer varies depending on the color. A backer for laying in joints, which is characterized in that the difference between 2. In a sealing structure of a joint, which is formed by filling a sealing material on a backer laid on the inner bottom surface of the joint groove, a conductive region is provided at an appropriate place on the upper surface of the backer, and the conductive region corresponds to a position where the conductive region is formed. A method for measuring a wall thickness of a sealing material, comprising measuring a wall thickness of the sealing material by measuring a distance from an upper surface of the sealing material to the conductive region. 3. A joint sealing structure in which a backer laid on the inner bottom surface of a joint groove is filled with a sealing material, and a conductive region is provided at an appropriate position on the upper surface of the backer, and the conductive region corresponds to the formation position of the conductive region. A device for calculating and measuring a wall thickness of the sealing material by measuring a distance from an upper surface of the sealing material to the conductive region, wherein the measuring device includes a main body having a shape that is easily grasped by a human, A needle for conduction detection, which is supported so as to be able to project from the tip of the main body, an operation section for projecting and inserting the needle, display means for displaying the projecting length of the needle, and the tip of the needle is A continuity detecting circuit that is electrically connected through the conductive region and the needle when reaching the conductive region through the sealing material; and a continuity display unit that operates by conduction of the continuity detecting circuit. Siri Wall thickness measuring device such as a grayed material. 4. A protective structure in which a soft coating film is laminated on a laying material laid on the lower ground, and a conductive region is provided in an appropriate place on the upper surface of the laying material, and a soft coating corresponding to a position where the conductive region is formed. A method for measuring the wall thickness of a soft coating film, which comprises measuring the wall thickness of the laying material by measuring the distance from the upper surface of the film to the conductive region. 5. A protective structure in which a soft coating film is laminated on a laying material laid on the lower ground, and a conductive region is provided at an appropriate place on the upper surface of the laying material, and a soft coating corresponding to a position where the conductive region is formed. A device for calculating and measuring the wall thickness of the soft coating film by measuring the distance from the upper surface of the film to the conductive region, wherein the measuring device is a main body having a shape that can be easily grasped by human hands, A needle for conduction detection, which is supported so as to be able to project from the tip of the main body, an operation section for projecting and inserting the needle, display means for displaying the projecting length of the needle, and the tip of the needle is A conduction detecting circuit which conducts through the conductive area and the needle when the soft coating is penetrated to reach the conductive area; and a continuity display means which operates by conduction of the conduction detecting circuit. Measuring equipment for thickness of soft coating film. 6. A base portion having a shape that can be easily gripped manually, a screw rod protruding from a tip end portion of the base portion, a continuity detecting needle fixed to the tip end of the screw rod, and a screw rod of the screw rod. A hollow tubular movable part that advances and retreats in the axial direction by being screwed onto the outer periphery and rotated, a projection length display means for displaying the projection length of the needle, and a continuity detection that conducts when the tip of the needle is conductive. A continuity measuring device comprising: a circuit; and a continuity display unit that is activated by the continuity of the continuity detecting circuit. 7. When the electric resistance values of the backer and the sealing material or the electric resistance values of the laying material and the soft coating film have a large difference exceeding a predetermined value, respectively, between the materials. A method for measuring the wall thickness of a sealing material or the like, characterized in that the depth of the interface is measured by detecting an electrical resistance value at the interface or a weak current flowing therein.