JP6282804B2 - Cover thickness measuring device - Google Patents

Description

  The present invention relates to a cover thickness measuring apparatus that can measure a cover thickness (interval between a reinforcing bar and a formwork) for a reinforcing bar in a reinforced concrete structure by numerical values while shifting measurement points.

The cover thickness of the concrete with respect to the reinforcing bars in the reinforced concrete structure is also important for preventing or suppressing the corrosion of the reinforcing bars. There was Utility Model Registration No. 3134672 as a measure for measuring the cover thickness. This is equipped with a mold side reference part to be applied to the inner surface of the mold form, a reinforcing bar side reference part to be applied to the reinforcing bar to measure the cover, a large handle for operating the instrument, and a small handle. The cover thickness can be measured by sliding the reinforcing bar side reference portion to an arbitrary position of the reinforcing bar while being applied to the inner surface of the frame.
Utility Model Registration No. 3134672

  However, the thing of the said patent document 1 hold | maintains a handle large and a handle small in a hand, first applies a formwork side reference | standard part, and then slides the handle large and applies a rebar side reference | standard part to a reinforcement. . As a result, it is possible to measure the cover thickness by reading the scale on the small handle, indicating the distance (interval) between the two reference parts. There was a problem that only the reachable range (including depth) could be measured.

  The present invention solves the above-mentioned problems, and the object of the present invention is not limited to the reach of the cover thickness by the distance between the reinforcing bar and the formwork of the reinforced concrete structure, but at any depth. It is an object of the present invention to provide a cover thickness measuring apparatus that can measure the thickness of the cover.

In order to achieve the above object, the cover thickness measuring device of the present invention is a distance measuring device between a measuring plate and an outer surface of the measuring plate which are installed opposite to each other via a pantograph member that expands in conjunction with the operation of an air cylinder. A measuring instrument having an encoder set to perform, a display panel for receiving a signal from the encoder of the measuring instrument and displaying a numerical value, a hand instrument having a connection port of an air pump for operating the air cylinder, It is equipped with an air path and a signal path, and is connected via a flexible pipe whose shape and length can be set arbitrarily. The instrument was inserted to a measurement location of an arbitrary depth in a reduced state, and the value at that depth was configured to be accurately transmitted to the hand instrument.
Further, the head thickness measurement apparatus of the present invention, possess a wire while the tip is mounted in the measuring plate, a reel for delivering the wire provided on the other of said measuring plate, wherein the encoder is the The length of the wire pulled out from the reel is measured, and the distance between the outer surfaces (cover thickness) can be measured when the outer surfaces of the measuring plates come into contact with each other.

Further, the cover thickness measuring apparatus according to claim 2 is characterized in that the hand instrument is provided with a hanging strap, and the measured value is very close to an operator who hangs the hand instrument on the neck or shoulder. It was configured to be able to read.

Furthermore, the cover thickness measuring apparatus according to claim 3 is characterized in that the pantograph-type member expands in conjunction with the pressure applied to the air cylinder, and when the pressure is applied to the air cylinder The measurement plate is expanded so that it can be measured, and when the pressure on the air cylinder is released, the measurement plate can be reduced.

  According to the present invention, the measurement plate installed oppositely through the pantograph type member by the operation of the air pump connected to the hand instrument is expanded so as to contact the reinforcing bar and the formwork, and the value at the time of expansion is measured by the encoder. It is determined accurately and accurately so that it can be accurately displayed on the display panel of the handheld device. In addition, the length of the flexible pipe with the air path and signal path connecting the hand instrument and the measuring instrument can be arbitrarily set, so the numerical value measured by the measuring instrument is accurately displayed on the display panel of the hand instrument. It can be displayed, and the numerical value can be accurately read at hand, thereby exhibiting various excellent effects.

  Further, according to the invention of claim 2, the measurer can hang the hand instrument around the neck or shoulder at the time of measurement, and has an excellent effect that the measured value can be read accurately by visual observation. It is what you play.

  Further, according to the invention of claim 3, since the measurement plate is expanded so that it can be measured when pressure is applied to the air cylinder, and the measurement plate can be reduced when pressure on the air cylinder is released, the measurement location can be adjusted by operating the air pump. It has an excellent effect of being able to measure while changing the point.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic partially cutaway perspective view of the entire device of the present application, FIG. 2 is a side view when the measuring device is expanded, and FIG. 3 is a side view when the measuring device is reduced.

  As shown in FIG. 1, the device 1 of the present application includes a hand instrument 2 and a measuring instrument 3. A hanging string (including a belt or a band) 4 is fixed (may be detachable) to the hand device 2. The hand strap 2 can be hung on the front (abdomen) or side of the human body by hanging the hanging strap 4 on the neck or shoulder, and the measurement signal from the measuring device 3 can be displayed on the upper surface in this state. A display board 5 is provided.

  The display panel 5 operates by turning on a hand switch 6a using a battery or a rechargeable battery (not shown) housed in a battery chamber 6 built in the hand device 2 as a power source. An air pump 7 can be connected to the input end 8a of the built-in air connector 8 in the hand device 2 so that the tip nozzle 7b of the tube 7a can be connected. In the illustrated case, the air pump 7 sends air from the output end 8b of the air connector 8 toward the measuring device 3 through the check valve (not shown) through an operation of repeatedly grasping by hand. It is like that. The air suction port 7c is also provided with an air discharge cock 7d.

  The air pushed out by the operation of the air pump 7 is supplied to the air cylinder 10 of the measurement unit 3 through the air passage a provided in the flexible tube 9. The pressure applied to the air cylinder 10 can be confirmed by turning on a lamp 11 provided on the upper surface of the hand device 2.

  The measuring instrument 3 supports measuring plates 13 and 13 'via a pantograph member 12 that expands when the pressure from the air pump 7 is applied to the air cylinder 10. Of the pantograph member 12, the upper end of the elbow shape formed by the first link 14, 14 ′ and the second link 15, 15 ′ is pivotally attached to the upper pin 17 of the extension frame 16 of the air cylinder 10. Further, the lower end portion of the elbow shape is pivotally attached to the distal end pin 20 of the shaft 19 extended from the distal end tool 18 of the piston 10 ′ of the air cylinder 10, and the right and left portions of the elbow shape are the measurement plates 13, 13. ′ Is pivotally attached to the upper pin 22 of the vertical frame 21 fixed to the central portion of the inner surface of ′.

  Of the pantograph member 12, the base end portion of the chevron formed by the third links 23 and 23 'is pivotally attached to the lower pin 24 of the extension frame 16 of the air cylinder 11, and the tip end of the chevron is It is pivotally attached to the lower pin 25 of the vertical frame 21 fixed to the center of the inner surface of the measuring plates 13 and 13 '.

  When air pressure is applied to the air cylinder 10, the piston 10 ′ is pulled, and the pantograph-type member 12 expands as the distal end pin 20 of the shaft 19 extending from the distal end tool 18 moves upward to reinforce the reinforcing bar. The outer surfaces of the measurement plates 13 and 13 'are brought into contact with the inner surfaces of A and the mold B, and the state shown in FIG. On the other hand, when the air pressure applied to the air cylinder 10 disappears, the pantograph member 12 is folded and contracted as shown in FIG. 3 by the weight of the measurement plates 13 and 13 '.

  An encoder 26 is provided on one inner surface of the measurement plates 13, 13 ′, and a tip of a wire 28 drawn from a reel 27 built in the encoder 26 is bound to a binding tool 29 on the other inner surface. ing. As described above, when the measurement plates 13 and 13 'are expanded and the outer surfaces of the reinforcing bars A and the formwork B are brought into contact with each other, the distance between the outer surfaces (cover thickness) C can be measured. Is set to The reel 27 of the encoder 26 is biased by a spring (not shown) in the winding direction of the wire 28.

  A power source for operating the encoder 26 is fed from a battery or a rechargeable battery in the battery chamber 6 built in the hand device 2 through a signal path b that runs vertically through the flexible tube 9. The numerical values measured by the encoder 26 are displayed on the display board 5 of the hand device 2 through the signal path b in the flexible tube 9.

  Next, the operation of the present device will be described. First, the operator (measurer) connects the tip nozzle 7 b of the air pump 7 to the air input end 8 a provided on the lower surface of the hand device 2. Further, the flexible tube 9 connected to the air cylinder 10 of the measuring device 3 is connected to the output end 8 b provided on the lower surface of the hand device 2. In this case, the air path a and the communication path b provided in the flexible tube 9 are connected to each other.

  Next, when the operator hangs the hand device 2 on the neck (or shoulder) with the hanging strap 4, the measuring device 3 in a contracted state is moved between the rebar A and the formwork B together with the air cylinder 10. The flexible tube 9 is inserted from the top to the bottom using the flexibility. This insertion position (depth) may be determined by a mark displayed on the surface of the flexible tube 9 with numbers, colors, etc., for example, every meter. The length of the flexible tube 9 is not limited, but may be about 3 to 6 meters.

  Next, when the operator operates to repeatedly hold the air pump 7 and injects air into the air cylinder 10, the piston 10 ′ is pulled and the shaft 19 extended from the tip tool 18 is moved upward, and the pantograph The expression member 12 is expanded, the measurement plates 13 and 13 'are opened in parallel with the expansion direction, and the rebar A and the mold B are brought into contact with the inner surface.

  A distance 27 between the outer surfaces (cover thickness) C of the measurement plates 13 and 13 ′ is drawn from the encoder 26, and the distance is measured according to the drawn amount, and the signal is sent to the display panel 5 of the hand apparatus 2 through the flexible tube 9. It is done. The display on the display panel 5 can be confirmed immediately (in real time) because it is on the upper surface of the hand device 2 that is hung on the neck or shoulder by the hanging strap 4 as an operator.

  Thus, the operator does not send air from the air pump 7 but operates to remove the air from the air pump 7 so that the pantograph member 12 is folded by the weight of the measurement plates 13 and 13 '. Reduce. Thus, the measuring device 3 can freely move between the reinforcing bar A and the formwork B in the contracted state. Thus, after moving to another location (including the depth), after confirming the depth of that location, the air pump 7 is operated to expand the pantograph-type member 9 again, and the measurement plates 13, 13 'are expanded. It can be opened parallel to the direction and brought into contact with the reinforcing bar A and the formwork B.

  The device of the present application expands the measurement plate through the pantograph-type member by operating the air pump, and when the outer surface of the measurement plate is brought into contact with the reinforcing bar and the formwork by the expansion, it is covered by the amount of wire drawn from the encoder. It is a cover thickness measuring device that can be obtained immediately and accurately while changing the measurement location, and can be widely applied to industries such as building construction, road construction, tunnel construction, dike construction, etc. It can be done.

It is a schematic partially cutaway perspective view of the entire device of the present application. It is a side view at the time of expansion of a measuring device. It is a side view at the time of reduction of a measuring device.

DESCRIPTION OF SYMBOLS 1 This application apparatus 2 Hand apparatus 3 Measuring instrument 4 Hanging string (a belt or a band is included)
5 Display panel 6 Battery chamber 7 Air pump 7a Tube 7b Tip nozzle 8 Air connector 8a Input end 8b Output end 9 Flexible tube 11 Lamp 10 Air cylinder 10 'Piston 12 Pantograph type member 13, 13' Measuring plate 14, 14 'First Link 15, 15 'Second link 16 Extension frame 17 Upper pin 18 Tip 19 Shaft 20 Tip pin 21 Vertical frame 22 Upper pin 23, 23' Third link 24 Lower pin 25 Lower pin 26 Encoder 27 Reel 28 Cord 29 Binding tool a Air path b Communication path

Claims (3)

A measuring plate provided oppositely via a pantograph-type member that expands in conjunction with the operation of the air cylinder, and a measuring instrument including an encoder set to measure the distance between the outer surfaces of the measuring plate;
A display panel for receiving a signal from the encoder of the measuring instrument and displaying a numerical value; a hand instrument having a connection port of an air pump for operating the air cylinder;
It is equipped with an air path and a signal path, and is connected via a flexible pipe whose shape and length can be set arbitrarily .
A wire having a tip attached to one of the measurement plates;
A reel provided on the other side of the measurement plate for delivering the wire;
The cover thickness measuring device , wherein the encoder measures the length of the wire drawn from the reel . The cover thickness measuring apparatus according to claim 1, wherein the hand instrument is provided with a hanging strap. The cover thickness measuring device according to claim 1 or 2 , wherein the pantograph type member is configured to expand in conjunction with a pressure applied to the air cylinder.

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