JP2012132809A - Substrate detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a substrate detector in which a measurement body which is fitted into a measurement cylinder and indicates a scale reliably indicates an insertion depth scale even while insertion work of a detecting stylus is performed, and which can smoothly process measurement work regardless of how high or low a measurement position is.SOLUTION: The substrate detector has a measurement cylinder d one end of which is inserted into a cylindrical body a having a needle hole through which a detecting stylus j moves in and out, the other end 17 of which protrudes, and which protrudes the detecting stylus j pressed by energization by an inserted coil spring. A scale 14 proportional to a length of the protruded detecting stylus j is added at an outer circumferential surface part 13 of the measurement cylinder d, and a measurement body k is fitted into the measurement cylinder d.

Description

  The present invention relates to the field of a base material detector that detects a base material used in a building or the like through a detection needle.

  Conventionally, as a base material detection tool, one disclosed in JP-A-11-281305 is disclosed.

  The base material detector of the above-mentioned published patent publication is a component member that can read the thickness of the wall material when the insertion needle 5 pierces the base material s. It is disclosed that a depth scale 19 for displaying the insertion depth is provided.

  Furthermore, Japanese Patent Application Laid-Open No. 2003-156303 is disclosed as a conventional needle type ground detector.

The needle type ground detector of the above-mentioned published patent publication has a window 23a through which a part of the movable body 50 constituting the detector can be seen to measure the thickness T of the interior wall 101. The scale 23b is provided along the portion 23a.

  With this configuration, for example, when the tip 41 of the detection needle 40 abuts against the base material 103 as shown in FIG. 5, the movement amount L of the end 51a of the piston 51 in the window 23a is read by the scale 23b, In this configuration, the thickness T of the wall 101 is measured.

Japanese Patent Laid-Open No. 11-281305 Japanese Patent Laid-Open No. 2003-156303

  However, the above-described ground material detector disclosed in Japanese Patent Application Laid-Open No. 11-281305 discloses the guide body when the handle body 1 is gripped by hand and the handle body 1 is pushed toward the wall surface or the like while being gripped. 1 slides backward into the gripping body against the elastic body 9, whereby the insertion needle 5 is exposed and protrudes from the needle outlet hole 8 a, and the further insertion of the handle 1 causes the insertion needle 5 to be The insertion needle penetrates through the wall surface or the like when the detection site w is inserted and there is no base material s, and the insertion needle penetrates through the wall surface or the like as the detection site w when the base material s is present. The needle 5 is pierced into the base material s, and insertion beyond that is impossible, and the change in insertion resistance due to insertion of the insertion needle 5 into the wall surface or the like can be sensed in response, or the insertion needle 5 can be inserted into the insertion needle 5. Visually confirm the insertion stop position with the immersion position of the guide body 8 into the handle body 1 Accordingly, the presence or absence of the base material s is recognized. At this time, since the depth scale 9 for displaying the insertion depth of the insertion needle 5 is provided on the guide body 8, the insertion needle 5 is provided. Is a configuration in which the thickness of the wall material can be read when it pierces the base material s.

  Although the said base material detection tool can read the insertion depth of the insertion needle 5 with the scale 9, the scale 9 of the insertion depth had to be measured with the insertion needle 5 inserted, and further, There is a problem that it is necessary to perform recording or the like while the insertion needle 5 is inserted.

  Furthermore, if the handle body 1 is removed carelessly while the depth scale 9 is not recorded in spite of being able to measure the insertion depth by inserting the folding insertion needle 5, the insertion needle There was a risk that 5 would slip into the guide body 8 and the scale 9 would return to “0”.

  Further, when the base material detection tool is inserted into a wall surface or the like at a high place, the insertion depth scale 9 is read while being stuck, and the reading operation is extremely complicated.

  Further, the needle-type ground detector of the publicly disclosed Japanese Patent Application Laid-Open No. 2003-156303 also discloses that when the tip 41 of the detection needle 40 abuts against the base material 103, the end 51a of the piston 51 is brought into contact with the window 23a. Although it has a frame which can measure the thickness T of the interior wall 101 by reading the movement amount L with the scale 23b, it is particularly during the projecting operation of the detection needle 40 to the wall surface of the altitude. If the grip 10 is pulled out, the end 51a of the piston portion 51 returns to the position of “0” on the scale 23b. Therefore, the grip 10 could not be pulled out during the measurement.

  Therefore, the reading and reading work of the insertion depth at the time of the pushing work for detecting the ground such as the wall surface at a high place is complicated.

Furthermore, the above-described ground material detector and needle type ground surface detector disclosed in the prior art are scales 9 and 23b for reading the insertion depth when the operator inserts the insertion needle 5 or the detection needle 40 into the ground material. There is a cumbersome work that has to be adjusted in advance to a position where it is easy to see.

However, according to the present invention, the scale 14 is inserted into the measuring cylinder d even during the insertion operation of the detection needle j, even if the detection needle j is extracted after the insertion operation at a high place, and is submerged in the cylinder a. The measurement body k that indicates that the insertion depth scale 14 is instructed reliably, so that the measurement operation can be smoothly processed regardless of the height of the measurement position.

Further, according to the present invention, a needle hole 2 through which the detection needle j enters and exits and a front surface portion 1a that contacts a surface portion such as a wall surface p are formed in a disk shape and a flat abutting portion 1b is formed. Even if the front surface portion 1a of the contact portion 1b of the cylindrical body a hits the wall surface p or the like when the detection needle j is inserted, the front surface portion 1a of the contact portion 1b is not marked on the wall surface p. Damage was prevented and the aesthetic appearance of the wall surface p was also ensured.

As a means for solving the problem, the invention according to claim 1 is characterized in that one end portion 11 is fitted into a cylindrical body a having a needle hole 2 through which the detection needle j enters and exits, the other end portion 17 protrudes, and In the base material detector having the measurement cylinder d that allows the detection needle j that is pressed by the bias of the coil spring g to be inserted to jump out, the detection needle j that has jumped out to the outer peripheral surface portion 13 of the measurement cylinder d. The base material detector is characterized in that a scale 14 proportional to the length is added and a measurement body k to be inserted into the measurement cylinder d is inserted.

As means for solving the problem, the invention according to claim 2 is the base material detector according to claim 1, wherein the measuring body k has a slidable ring shape.

As a means for solving the problem, the invention according to claim 3 is characterized in that one or a plurality of concave grooves 15 are formed in the axial direction of the measurement cylinder d and the concave grooves 15 are formed inside the measurement body k. The base material detector according to claim 1, wherein one or a plurality of protrusions 31 to be inserted are formed.

As a means for solving the problem, the invention according to claim 4 is characterized in that the width of the measuring body k is uniformly formed. It is a base material detector.

As a means for solving the problem, the invention according to claim 5 is characterized in that the measurement body k is fitted in a right angle to the axial direction of the measurement cylinder d. Item 5. The base material detector according to Item 1, Item 2, Item 3, or Item 4.

As a means for solving the problem, the invention described in claim 6 includes a front surface portion having a needle hole 2 through which the detection needle J enters and exits at the distal end portion 1 of the cylindrical body a, and which contacts the surface portion such as the wall surface p. 1. The base material detector according to claim 1, wherein 1 a has a flat abutting portion 1 b.

As a means for solving the problem, the invention described in claim 7 includes a needle hole 2 through which the detection needle j enters and exits from the distal end portion 1 and a flat abutting portion on the front surface portion 1a which contacts the surface portion such as the wall surface p. 1b, a hollow portion 7 having an opening 4 at the other end 3, a recess 6 at an inner front portion, and an assembly instruction recess 6a inside the opening 4. The cylindrical body a and one end 8 are inserted into the recess 6 of the hollow portion 7 of the cylindrical body a, and the guide body b having a through hole 9 and the through hole 9 of the guide body b are inserted into the detection body. A small-diameter guide body c having a small-diameter through hole 10 through which the needle j passes, a locking portion 12 at one end 11 between the cylindrical body a and the guide body b, and the detection needle j at the outer peripheral surface portion 13. A scale 14 indicating the insertion depth is added, bent at a right angle toward one end 11, and formed into a groove 15 extending in the axial direction. A through hole 16 is formed on the inside, and a needle comprising an insertion part 19 for inserting the other end part 18 of the needle guide body f into the other end part 17 and a through hole 20 of the detection needle j connected to the insertion part 19. A protrusion 21 for locking the fixed body h is formed on the inner side of the fitting insertion hole 16a connected to the through hole 16, and is formed on one end of the grip body l on the right inner side of the through hole 16. A measurement cylinder d that forms a female screw part 23 into which the male screw part 22 is screwed, and a guide part 24 that is fitted into the concave groove 15 of the measurement cylinder d are formed inside the through hole 25, and the other end. A hook part 27 projecting outward from the part 26, a holder part e forming an instruction convex part 27a fitted into the assembly instruction concave part 6a of the cylindrical body a at the base part of the collar part 27, and the detection Formed between a needle guide body f with a through-hole 28 that penetrates the needle j, and the guide body b and the small-diameter guide body c. The coil spring g for inserting the needle guide body f is inserted into the gap 29 formed and the gap 30 formed between the measurement cylinder d and the needle guide f, and the measurement cylinder d is always urged to the right side, and one or a plurality of protrusions 31 to be inserted into the concave groove 15 of the measurement cylinder d are formed on the inner side, and proportional to the length of the detection needle j protruding from the cylinder a. The base material detector is characterized in that a measuring body k that is inserted into the measuring cylinder d that is instructed while sliding the scale 14 of the measuring cylinder d is formed, and the constituent members are assembled and formed. .

According to the first aspect of the present invention, one end 11 is fitted and inserted into the cylindrical body a having the needle hole 2 through which the detection needle j enters and exits, and the other end 17 protrudes, and the bias of the coil spring g to be inserted is applied. In the base material detector having the measurement cylinder d that allows the pressed detection needle j to jump out, a scale 14 proportional to the length of the detection needle j jumped out to the outer peripheral surface portion 13 of the measurement cylinder d is added. At the same time, since the base material detector is used to insert the measuring body k to be inserted into the measuring cylinder d, the distance between the wall surface p and the base (beam) r is very easy by displaying the maximum depth of insertion of the detection needle j. Can be measured.

Furthermore, in the present invention, since the maximum depth amount of the detection needle j can be displayed and held by the sliding measuring body k, the measured numerical value can be read in a stable fixed state.

Further, according to the present invention, since the measuring body k does not require reading in a state where the detection needle j is inserted, recording becomes easy.

Furthermore, the present invention can reliably read the maximum depth of the inserted detection needle j because the measuring body k does not slide even after the operation of extracting the detection needle j immediately after the insertion of the detection needle j. .

Further, according to the present invention, even if the position to be measured is high, even if it is removed immediately after insertion as described above, the measuring body k does not slide easily and maintains an appropriate holding force. It has the advantage that the depth can be measured accurately.

  The invention according to claim 2 is the same as the invention according to claim 1 because the measuring body k is a base material detector having a ring shape that is slidable.

According to the third aspect of the present invention, a single or a plurality of concave grooves 15 are formed in the axial direction of the measurement cylinder d, and a single protrusion or 31 is provided on the inner side of the measurement body k. Since it is a base material detector to be formed in plural, it has the same effect as the invention of claim 1.

Since the invention according to claim 4 is a base material detector in which the width of the measuring body k is uniformly formed, it has the same effect as the invention according to claim 1.

The invention according to claim 5 is the base material detector that is inserted into the measuring body k at a right angle with respect to the axial direction of the measuring cylinder d. Has the same effect.

The invention described in claim 6 has a needle hole 2 through which the detection needle J enters and exits at the distal end portion 1 of the cylindrical body a, and the front surface portion 1a which contacts the surface portion such as the wall surface p has a flat abutting portion 1b. Since it is the underlying material detector, it has the same effect as the invention according to claim 1.

The invention described in claim 7 has a needle hole 2 through which the detection needle j enters and exits at the distal end portion 1, and a flat abutting portion 1 b on the front surface portion 1 a that contacts the surface portion such as the wall surface p, and the other end portion 3. Has a hollow portion 7 having an opening 4, a recess 6 in an inner front portion, and an assembly instruction recess 6 a inside the opening 4, and one end 8. Is inserted into the recess 6 of the hollow portion 7 of the cylindrical body a and has a guide body b having a through hole 9, and a small diameter through hole 10 through which the detection needle j passes through the guide hole b of the guide body b. A small-diameter guide body c having a diameter, and a scale 12 that has a locking portion 12 at one end 11 between the cylindrical body a and the guide body b, and displays the insertion depth of the detection needle j on the outer peripheral surface portion 13. 14, bent at a right angle toward one end 11, formed with a groove 15 extending in the axial direction, formed with a through hole 16 on the inside, and others The protruding portion 21 that locks the needle fixing body h including the insertion portion 19 for inserting the other end portion 18 of the needle guide body f into the portion 17 and the through-hole 20 of the detection needle j connected to the insertion portion 19 A female screw portion 23 is formed in the inner portion of the fitting insertion hole 16a connected to the through hole 16 and the male screw portion 22 formed in one end portion of the grip body l is screwed to the right inner portion of the through hole 16. And a guide part 24 fitted into the groove 15 of the measurement cylinder d is formed inside the through hole 25, and a flange part 27 protruding outward from the other end part 26 is formed. A holder part e for forming an instruction convex part 27a to be inserted into the assembly instruction concave part 6a of the cylindrical body a at the base part of the collar part 27, and a needle guide body with a through hole 28 penetrating the detection needle j f, a gap 29 formed between the guide body b and the small-diameter guide body c, and the measurement tube The coil spring g for inserting the needle guide body f is inserted into a gap 30 formed between d and the needle guide body f, and the measurement cylinder d is always urged rightward, One or a plurality of protrusions 31 to be inserted into the concave groove 15 of the measurement cylinder d are formed on the inner side, and the scale 14 of the measurement cylinder d is slid in proportion to the length of the detection needle j protruding from the cylinder a. However, it is the base material detector that forms the measurement body k to be inserted into the measurement cylinder d to be instructed and assembles and forms the respective constituent members, and thus has the same effect as the invention of claim 1. .

It is a front view which shows the use condition of this invention base material detector.

It is a front view in the state where the same detection needle does not fly out.

It is an AA line vertical front view in a figure.

It is a perspective view before the assembly of the cylinder and a holder part.

It is a perspective view of the state which assembled the member of FIG.

It is a front view of the measurement cylinder which inserted the holder part.

FIG. 7 is a perspective view of FIG. 6.

It is an enlarged front view of the holder part.

It is a right view of the holder part of FIG.

It is a top view of the holder part of FIG.

It is a figure which shows the coil spring before detection, a detection needle, a needle guide body, etc. in the measurement cylinder assembled in the cylinder.

It is a front view of the needle fixing body for fixing the one end part of the detection needle.

It is a right view of the needle fixing body of FIG.

It is a perspective view before the assembly of each component of the base material detector of the first embodiment.

It is a front view which shows the use condition of the base material detector of 2nd Example.

It is a perspective view of the base material detector of FIG.

FIG. 16 is a longitudinal front view of the base material detector of FIG. 15.

It is a perspective view before the assembly of each structural member in the base material detector of 2nd Example.

  Since the embodiments of the present invention relating to claims 1 to 7 of the present invention are common, they will be described collectively as follows.

  a is a cylinder constituting the base material detector of the present invention, and has the following configuration.

The cylindrical body a has a needle hole 2 through which the detection needle j enters and exits at the distal end portion 1, and a flat abutting portion 1 b on the front surface portion 1 a that contacts the surface portion such as the wall surface p. A hollow portion 7 having a portion 4, a concave portion 6 in an inner front portion, and an assembly instruction concave portion 6 a on the inner side of the opening 4.

  r is a base material attached to the back surface of the wall surface p.

  As shown in FIG. 1, the detection needle j has a structure that also penetrates the flat abutting portion 1b.

  Furthermore, a front hollow portion 7a with a step portion 4a having a slightly larger inner diameter is formed in the inner portion direction of the tip portion 1 from the opening 4 of the cylindrical body a.

  Furthermore, the said contact part 1b is a disk shape seeing from the front-surface part 1a direction.

  Reference numeral b denotes a guide body that is inserted into the cylindrical body a and has the following configuration.

  One end portion 8 of the guide body b is fitted into the concave portion 6 of the hollow portion 7 of the cylindrical body a, and a through hole 9 through which the detection needle j passes is formed on the inner side portion.

  c is a small-diameter guide body. This configuration has a small-diameter through hole 10 which is inserted into the through hole 9 of the guide body b and through which the detection needle j passes.

  d is a measuring cylinder and has the following configuration.

  The measuring cylinder d has a circular cross section, and has a locking portion 12 at one end 11 fitted into the hollow portion 7 formed between the cylinder a and the guide body b. A scale 14 for displaying the insertion depth of the detection needle j is added to the surface portion 13.

Then, normally, two concave grooves 15 that are bent at a right angle toward the one end 11 and extend in the axial direction are formed symmetrically.

A through hole 16 is formed on the inside, and a needle comprising an insertion part 19 for inserting the other end part 18 of the needle guide body f into the other end part 17 and a through hole 20 of the detection needle j connected to the insertion part 19. A protrusion 21 for locking the fixed body h is formed on the inner side of the fitting insertion hole 16a connected to the through hole 16, and is formed on one end of the grip body l on the right inner side of the through hole 16. A female screw portion 23 into which the male screw portion 22 is screwed is formed.

  e is a holder part and has the following configuration.

  One or a plurality of guide portions 24 to be inserted into the concave grooves 15 of the measurement cylinder d are formed inside the through-hole 25, and the flange portion 27 protrudes outward from the other end portion 26. The flange portion 27 An instruction convex portion 27a to be fitted into the assembly instruction concave portion 6a of the cylindrical body a is formed at the base portion (FIGS. 8, 9, and 10).

  f is a needle guide body. The needle guide body f is formed with a through hole 28 that penetrates the detection needle j.

  The needle guide body f is inserted into the coil spring g as shown in FIGS.

  k is a measuring body and has the following configuration.

  The measurement body k is formed in a ring shape that can be inserted into the measurement cylinder d, and one or a plurality of protrusions 31 that are inserted into the concave grooves 15 of the measurement cylinder d are formed inside.

  Further, the measuring body k is assembled by being inserted into the measuring cylinder d in advance as shown in FIGS.

  n is a cap into which the magnet m is inserted and fitted into the grip body l.

  Assembling of the constituent members of the base material detector of the present invention described above is performed as follows.

  One end portion 8 of the guide body b is fitted into the recess 6 of the hollow portion 7 through the opening 4 of the cylindrical body a.

  Next, a small-diameter guide body c is inserted into the through hole 9 of the guide body b.

  Then, after inserting the needle guide body f into the coil spring 8, the detection needle j is inserted from the needle fixing body h into the through hole 28 of the needle guide body f, and the small diameter from the measurement cylinder d. Insert into the through hole 9 of the guide body c and insert into the needle hole 2.

  In the measurement cylinder d, the guide portion 24 of the holder e is inserted into the concave groove 15 of the measurement cylinder d, and the measurement cylinder d and the holder e are assembled in advance.

  After assembling the measurement body d and the holder part e, the ring-shaped measurement body k is inserted into the measurement cylinder d.

  After assembling each member as described above, for example, as shown in FIG. 3, the grip body l is screwed to the rear portion of the measurement cylinder d.

  After assembling the holder part e and the measurement body k to the measurement cylinder d, the small-diameter guide body c and the needle guide body f having the detection needle j penetrated, for example, as shown in FIG. The measurement cylinder d is inserted into the cylinder a into which is inserted.

  Then, the holder portion e is fitted into the opening 4 of the cylindrical body a, and the two bodies are bonded so as not to be easily detached via an adhesive or the like.

  The detection needle j assembled as described above is assembled such that the needle tip sinks about 1.5 mm from the needle hole 2 by the extension action of the coil spring g. For example, as shown in FIG. 3, the tip of the detection needle j does not fly out from the needle hole 2.

  Furthermore, in the base material detector of the present invention, when the constituent members are assembled as described above and in the state before insertion, the measurement body k is in close contact with the holder portion e, and the measurement body k The right side surface portion is in a negative region with respect to the “0” position of the scale 14.

  Further, the locking part 12 of the measuring cylinder d is locked by the guide part 24 of the holder part e fitted into the cylinder a and does not come out.

  Then, the measuring body k is assembled in a state of securing an appropriate holding force with respect to the measuring cylinder d by the projecting portion 31 or the like inserted into the concave groove 15 of the measuring cylinder d. Yes.

  When the cylindrical body a assembled as described above is gripped with the left finger and the measurement cylindrical body d gripped with the right finger is rotated, the guide portion 24 of the holder portion e is bent at a right angle. The cylindrical body a and the measurement cylindrical body d are in a locked state.

  Next, the operation of the base material detector of the present invention will be described.

  The measurement cylinder d in the locked state is rotated in the reverse direction to the rotation operation, and the locked state between the cylinder a and the measurement cylinder d is released.

  As shown in FIG. 1, the grip body l is held, and the front surface portion 1a of the contact portion 1b is applied to the wall surface p.

  After that, when the grip body l is pressed and the needle tip hits the wall surface p, the right end portion of the measuring body k is positioned on the scale 14 of “0”. Further, when the head is advanced as it is, the detection needle j, the measurement cylinder d and the like compress the coil spring g, and the detection needle j is inserted into the wall surface p. When the tip of j hits the base material r, the rush of the detection needle j stops.

  When the insertion of the detection needle j is stopped as described above, the grip body l is grasped and removed. At that time, due to the biasing of the coil spring g, the measurement cylinder d is extended from the pressed state as shown in FIG. Then, the detection needle j does not dive out of the needle hole 2.

  At that time, the measuring body k slides on the scale 14 as shown in FIG. 16 and stops in a state where the scale 14 is instructed.

  Therefore, the maximum insertion depth of the detection needle j can be easily recorded and measured by reading the number on the right side surface of the measuring body k that is slid and stopped.

  Then, after the measurement is completed, the measurement body k is brought into close contact with the holder portion e as shown in FIG.

a cylinder b guide body c small diameter guide body d measuring cylinder e holder part f needle guide body g coil spring h needle fixing body j detection needle k measuring body l grip body m magnet n cap p wall r base material 1 tip 1a Front portion 1b Abutting portion 2 Needle hole 3 Other end portion 4 Opening portion 4a Step portion 6 Recess portion 6a Indicating recess portion 7 Hollow portion 7a Front hollow portion with step portion 8 One end portion 9 Through hole 10 Small diameter through hole 11 One end portion 12 Locking portion 13 Outer peripheral surface portion 14 Scale 15 Dent groove 16 Through hole 17 Other end portion 18 Other end portion 19 Insertion portion 20 Through hole 21 Projection portion 22 Male screw portion 23 Female screw portion 24 Guide portion 25 Through hole 26 Other end portion 27 Gutter part 27a Protrusion part 28 Through hole 29 Cavity part 30 Cavity part 31 Projection part

Claims (7)

One end is fitted in a cylinder having a needle hole for entering and exiting the detection needle, the other end is ejected, and the measurement cylinder is ejected by pressing the biasing force of the coil spring to be inserted. In the base material detector,
A base material detector characterized by having a scale proportional to the length of the detection needle jumping out on the outer peripheral surface portion of the measurement cylinder and inserting a measurement body to be inserted into the measurement cylinder.   The base material detector according to claim 1, wherein the measuring body has a ring shape that is slidable.   1 or 2, wherein one or a plurality of concave grooves are formed in the axial direction of the measurement cylinder, and one or a plurality of protrusions to be inserted into the concave grooves are formed inside the measurement body. The base material detector described in 1.   The base material detector according to claim 1, 2, or 3, wherein the width of the measurement body is uniformly formed.   5. The base material detector according to claim 1, 2, 3, or 4, wherein the measurement body is fitted at a right angle to the axial direction of the measurement cylinder.   3. The cylindrical body has a needle hole through which a detection needle enters and exits, and a front surface portion corresponding to a surface portion such as a wall surface has a flat abutting portion. The base material detector according to 3 or 4 or 5. It has a needle hole through which the detection needle enters and exits, and a flat abutting part on the front part that contacts the surface part such as a wall surface, an opening part on the other end part, and a concave part on the inner front part. And a hollow cylindrical body having an assembly instruction recess inside the opening.
A guide body having one end portion fitted into the concave portion of the hollow portion of the cylindrical body, and having a through hole;
A small-diameter guide body having a small-diameter through-hole inserted into the through-hole of the guide body and through which the detection needle passes,
There is a locking part at one end between the cylindrical body and the guide body, a scale indicating the insertion depth of the detection needle is added to the outer peripheral surface part, and it is bent at a right angle near the one end. And a concave groove extending in the axial direction, a through hole formed inside, an insertion portion for inserting the other end portion of the needle guide body at the other end portion, and a detection needle connected to the insertion portion. A protruding portion for locking the needle fixing body composed of a through hole is formed on the inner side of the fitting insertion hole connected to the through hole, and a male formed on one end of the grip on the right inner side of the through hole. A measuring cylinder that forms a female thread part into which the thread part is screwed;
A guide part to be inserted into the groove of the measurement cylinder is formed inside the through hole, and a flange part protruding outward from the other end part, and an assembly instruction for the cylinder body at the base part of the flange part A holder part for forming an instruction convex part to be inserted into the concave part;
A needle guide body with a through-hole penetrating the detection needle;
The coil spring for inserting the needle guide body is inserted into a gap formed between the guide body and the small-diameter guide body and a gap formed between the measurement tube body and the needle guide body. In addition, always urge the measurement cylinder to the right side,
One or more protrusions to be inserted into the groove of the measurement cylinder are formed on the inner side, and the measurement is instructed while sliding the scale of the measurement cylinder in proportion to the length of the detection needle protruding from the cylinder. Form a measurement body that fits into the cylinder,
A base material detector characterized in that each of the constituent members is assembled and formed.