JP5872878B2 - Portable rock wear measuring instrument, measurement auxiliary tool, and compression spring biasing force setting device for the measuring tool - Google Patents

Description

  The present invention relates to a portable rock wear capacity measuring tool capable of measuring the rock wear capacity in situ, a measurement auxiliary tool, and a compression spring biasing force setting device for the measurement tool.

  In examining the applicability of drilling machines such as drilling machines, rotary drilling machines, boom headers, tunnel excavators, etc., it is important to evaluate the “abrasibity” of rocks. As the surface hardness of rock, Mohs hardness has been used for a long time, and the value obtained by the “CERCHAR test” proposed at the French Coal Research Center is an index of “rock wear ability”. “Abrasion ability of rock” means, for example, the degree to which excavation tools are worn (or worn down) by the rock when excavating the rock with an excavating machine, and is different from “hardness of rock”. It is.

The “CERCHAR test” is a method in which a test needle made of a steel rod having a conical tip is slid while being pressed against the surface of a rock, and the wear state of the needle tip is measured after the test. Specifically, as shown in FIG. 6, a test needle S with a 90 ° apex angle at the tip is slid about 10 mm on the rock while applying a load of 70 N and tested after the test. When the diameter of the flat portion generated at the tip of the needle is (Wc), the following dimensionless value obtained by the “CERCHAR test” is an index of “rock wear ability”.
I _CERCHAR [Dimensionless] = Wc (mm) _/0.1 (mm)

  In the conventional “CERCHAR test”, a boring core that is the source of the specimen is collected in-situ and shaped into a shape that can be set in the “CERCHAR tester” (non-patented). Reference 1). Therefore, not only is it time-consuming to collect the specimen and its shaping, but it also takes a considerable number of days from the specimen collection to the test, so there is also a problem of rock alteration. There were various problems such as not being able to respond to the request to know the wear ability of the target rock immediately at the original location.

`` J.Standford (University of New South Wales) '' and `` P. Hagen (University of New South Wales) '' titled `` An Assesment of the Impact of Stylus Metallurgy on Cerchar Abrasiveness Index '' issued on February 12, 2009 paper

  An object of the present invention is to make it possible to measure the wear ability of a rock on site by using a portable rock wear ability measuring tool (hereinafter sometimes simply referred to as “measuring tool”).

The invention of claim 1 for solving the above-described problem is a cylindrical measuring tool main body and a tip portion of the steel bar formed into a conical shape, excluding the tip portion of the steel rod. The remaining part is formed steplessly, in order to urge the test needle in the protruding direction, and the test needle housed in the state where the maximum protruding length is regulated at the distal end side of the measuring instrument body A test needle urging means housed in the measuring instrument body, a test needle extraction preventing means for preventing the test needle from coming out of the measuring instrument body due to its own weight, and an urging force of the test needle urging means. In order to adjust the force, it is equipped with a biasing force adjusting means integrally provided on the side opposite to the test needle in the measuring instrument body, and portable rock wear capable of measuring the wear ability of the rock in the original position. a capacity measuring instrument, the test needle biasing means is a compression spring, the trial A plurality of needle extraction preventing means are accommodated in a lower spring seat where the lower end portion of the compression spring is elastically contacted, and a plurality of the needle extraction preventing means abut on the outer peripheral surface of the upper end portion of the test needle partially fitted to the lower spring seat. And a ring-shaped elastic ring which is elastically mounted on the outside of the plurality of small steel balls to ensure the contact force .

  The measuring tool according to the invention of claim 1 has a cylindrical shape made entirely of metal, and has a size and shape that can be grasped by a human hand, and is a weight that can be operated by one person. In addition, the above-described “CERCHAR test” can be performed alone on the rock in situ. Also, the biasing force (restoring force) of the test needle biasing means, which is stored in the measuring instrument main body and secures the piercing force of the test needle against the rock to be measured, is set to a reference value by the setting device. ing.

  At the time of non-measurement, the test needle protrudes from the lower end surface of the measuring tool main body by a predetermined length by the biasing force of the test needle biasing means, and the measurer holds the measuring tool with one or both hands and keeps the posture as it is. When the pierced part of the test needle protruding from the tip of the measuring tool is pressed against the target rock, the test needle moves backward against the main body of the measuring tool against the biasing force of the test needle biasing means. The rock is pressed with a force equal to the biasing force (restoring force) of the set test needle biasing means. In this state, when the measuring tool is slid to the side by a predetermined length, the tip of the pierced portion of the conical test needle is deformed flat due to wear, and the target rock has a groove-like streak. Is formed. Then, measure the wear ability of the target rock by measuring the diameter of the flatly deformed portion of the tip of the pierced portion of the test needle or the depth of the groove-shaped streak formed in the target rock. It can be done by the position and by the measurer alone.

  As described above, if the measuring tool according to the invention of claim 1 is used, the wear ability of the target rock can be measured at the original position and by a single measurer, so that the rock can be formed in a short time without altering the rock. The data related to the wear ability can be acquired, and the reliability of the data is improved. In addition, unlike the case of obtaining the specimen by collecting and shaping the specimen body from the target rock as in the past, it is possible to measure the wear ability of the rock at any position. The reliability of data also increases in that data relating to a plurality of types of wear ability can be acquired for the target rock.

Further, the compression spring constituting the test needle urging means is lightweight and easy to adjust the urging force, and is therefore suitable for a portable rock abrasion measuring instrument.

The test needle need only be held so as not to drop due to its own weight when not measured. Thus, as in the first aspect of the invention, the test needle can be prevented from dropping due to its own weight by the plurality of small steel balls coming into contact with the outer peripheral surface of the upper end of the test needle in a pressed state by the restoring force of the elastic ring. . In addition, the steel rods that make up the test needle are all stepless except for the pierced portion at the tip of the cone. When multiple steel balls are stored in the lower spring seat so that the proximity position is regulated, when a new test needle is inserted, the multiple steel balls retreat outward in the radial direction. A needle can be attached.

According to a second aspect of the present invention, there is provided the measuring tool support according to the first aspect , wherein the stepped portion at the lower end of the measuring tool main body is inserted and supported, and the measuring tool support is slidably attached to the rectangular frame-shaped slide guide body. And spike needles that are pierced by rocks at the time of measurement are provided at both ends along the slide direction of the measuring tool on the back surface of the slide guide body.

According to the invention of claim 2 , when measuring the wear ability by sliding the measuring tool to the side with the test needle of the measuring tool pressed against the target rock, the measurement supporting the measuring tool The tool support is slidably attached to the slide guide body, and the slide guide body is firmly and temporarily fixed to the target rock by a plurality of spike needles. Therefore, it is possible to stably perform the work of measuring the wear ability of the in-situ rock using the measuring tool specified in the first aspect .

According to a third aspect of the present invention, in the invention of the second aspect , the slide guide body is a divided short side body in which one short side portion is divided with respect to the remaining portion, and the divided short side body On the inner side, a stopper body is detachably assembled, and on the surface of the stopper body facing the divided short side body, the separation distance to the divided short side body is changed to change the stroke of the measuring tool. One or a plurality of stroke variable pins having different lengths are projected, and in a state where the specific stroke variable pin of the stopper body is in contact with the inner side surface of the divided short side body, The stopper body is detachably assembled so that the stroke of the measuring tool supported by the measuring tool support tool can be adjusted.

According to the invention of claim 3 , the stopper body is detachably attached to the divided short side body constituting the slide guide body of the divided structure, and one piece attached to the surface of the stopper body facing the divided short side body. Alternatively, the slide guide body can be obtained by assembling the stopper body to the divided short side body in a state where the selected specific stroke variable pin among the plurality of stroke variable pins having different lengths is in contact with the divided short side body. The length of the slide groove provided in is changed. As a result, the slide length of the measuring tool can be changed, and the optimum measurement length can be selected for the target rock.

The invention of claim 4 is temporarily fixed to the surface of the rock when the wearability of the rock in situ is measured using the portable rock wear measuring instrument according to any one of claims 1 to 3. The auxiliary tool main body is composed entirely of an elastic material, and the bottom surface is formed in a flat shape so that it can be temporarily fixed to the surface of the rock via an adhesive tool. In addition, a slide recess is formed in the center of the auxiliary tool body so that the lower end of the measurement tool body can be inserted without a gap so that the measurement tool body can slide in a specific direction. At the bottom, a piercing portion insertion hole portion through which a conical piercing portion at the tip of the test needle can be inserted is formed in the specific direction, and a bottom surface and an inner surface of the slide concave portion are covered with a protective plate. It is characterized by being.

Since the measurement auxiliary tool according to the invention of claim 4 is entirely made of an elastic material and has a recess for performing slide guide of the measurement tool, the measurement auxiliary tool is connected to the target rock through the adhesive tool. By temporarily fixing the measurement tool to the measurement site and sliding the measurement tool to the side along the slide recess, a stable measurement operation can be performed.

The invention of claim 5 is characterized in that, in the invention of claim 4 , the bottom surface and the inner surface of the slide recess are covered with a protective plate.

According to the invention of claim 5 , since the bottom surface and the inner surface of the slide recess formed in the auxiliary tool body are covered and reinforced with the protective plate, the wear ability of the rock whose surface is not flat can be measured. It becomes possible.

The invention of claim 6 is a cylindrical measuring tool main body and a piercing portion in which the tip of the steel bar is formed in a conical shape, and the maximum protruding length is restricted on the tip side of the measuring tool main body. The test needle housed in a state where it can be moved in and out, a compression spring housed in the measuring tool body to urge the test needle in the protruding direction, and the test needle come out of the measuring tool body by its own weight A test needle withdrawing prevention means for preventing the bias and a biasing force adjusting means integrally provided on the opposite side of the test needle in the measuring tool main body to adjust the biasing force of the compression spring . It is a device for setting the urging force of the compression spring of the portable rock wear capacity measuring tool capable of measuring the rock wear capacity in the original position so that the biasing force of the compression spring becomes a set value. With the measuring tool upright, use the lower end And a portion in which the base plate and the upper plate are connected by a plurality of connecting rods, with a space that slightly protrudes from the measuring tool insertion hole of the upper plate, and the compression spring setting. In order to support a reference weight having the same weight as the urging force so as to be movable up and down, it is composed of a weight holder provided integrally with the upper plate, and the test needle of the measuring instrument has an urging force with a flat end surface. Replace the needle, stand upright on the base plate of the frame in a reversed posture, and with the portion that becomes the lower end portion in use protrudes slightly upward from the measuring tool insertion hole of the upper plate, the reference weight is moved to the measuring tool. The biasing force of the compression spring is adjusted by the biasing force adjusting means of the measuring tool so that the end surface of the biasing force setting needle and the end surface of the measuring tool main body are the same in the state of being applied to the biasing force setting needle. It is characterized by its configuration.

According to the sixth aspect of the present invention, the biasing force of the compression spring of the measuring tool can be set with high accuracy by a simple device. Further, since it is portable at the measurement site, it is possible to set the biasing force of the compression spring of the measurement tool at the measurement site.

According to the present invention, since the wear ability of the target rock can be measured in situ and by a single measurer, data relating to the wear ability of the rock can be acquired in a short time without altering the rock. Increased data reliability. In addition, different from the case of obtaining the specimen by collecting the original specimen from the target rock and shaping it, the wear ability can be measured at any position, so that multiple types of wear can be applied to the same target rock. The reliability of data is also increased in that data relating to performance can be acquired. Further, since the test needle need only be held so as not to drop due to its own weight during non-measurement, the restoring force of the elastic ring as in the present invention allows a plurality of test needles to be placed on the outer peripheral surface of the upper end portion of the test needle. The lower spring seat allows the small steel balls to come into contact with each other in a pressed state to prevent the test needles from dropping due to their own weight and to restrict the maximum proximity position of the plurality of small steel balls toward the axis of the test needle. On the other hand, when a plurality of small steel balls are accommodated, when the new test needle is inserted, the plurality of small steel balls are retracted outward in the radial direction, so that the new test needle can be mounted.

It is a perspective view of the measuring instrument M ₁ and measuring aid E according to the present invention. It is a cross-sectional view of the measuring instrument M ₁ according to the present invention. It is an exploded sectional view similarly. FIG. 3 is an enlarged sectional view taken along line XX in FIG. 2. It is a figure which shows the use condition of a measuring tool. (A) is the plane schematic diagram of the streak 81 formed in the rock R, (b) is the elements on larger scale which show the abrasion state of the streak 81 and the front-end | tip of the test needle S. FIG. 3 is a perspective view of a compression spring biasing force setting device C. FIG. It is the front view which fractured | ruptured the part similarly. It is a perspective view of the measuring instrument M ₂ having a slide guide member G. It is an exploded perspective view similarly. It is the disassembled perspective view which looked at the slide guide body G from a different direction. (A) ~ (c) is an enlarged sectional view showing that the stroke of the measuring instrument M ₂ is changed.

The measurement tool M _{1 according} to the present invention will be described with reference to FIGS. 1 to 4, and then the wear ability of the rock R by the measurement tool M ₁ B will be described with reference to FIGS. 5 and 6. A method will be described. As shown in FIGS. 1 to 3, the measuring tool M ₁ is a cylindrical measuring tool body B and a test needle that is housed in a test needle holder B ₂ constituting the measuring tool body B so as to be able to enter and exit. S, a compression spring K accommodated in a spring holder part B ₁ constituting the measuring tool main body B, and an adjusting bolt F screwed into an adjusting bolt holder part B ₃ constituting the measuring tool main body B. ing. The measuring tool body B includes a spring holder portion B ₁ in which female screw portions 1 a and 1 b are formed on the inner periphery of both ends of the cylindrical body, and a male screw portion 2 formed in a small diameter portion at the upper end portion. Adjustment is made such that the test needle holder B ₂ screwed into the female screw portion ₁ a at the lower end of ₁ and the male screw portion 3 at the lower end are screwed into the female screw ₁ b at the upper end of the spring holder B _1. And a bolt holder B ₃ . The three holder parts B _{1 to} B ₃ constituting the measuring tool main body B are assembled into a cylindrical shape having a stepless outer peripheral surface by being screwed together.

The test needle holder B ₂ is formed to be shorter than the length of the test needle S, the test needle insertion hole 4 through which the test needle S is slidably inserted is formed, and the lower end surface 5 thereof is formed perpendicular to the axis. ing. The test needle S is made of a steel rod having an outer diameter of 10 mm, and the lower end portion thereof is formed in a conical shape with an apex angle of 90 ° to form a piercing portion Sa.

The irregular cylindrical adjustment bolt holder part B ₃ has a male screw part 3 in which an adjustment bolt F for adjusting the urging force of the spring holder part B ₁ and the compression spring K is screwed onto the outer periphery and inner periphery of the lower end part. And a female screw portion 6 are formed, respectively, and a pair of operation windows 8 for allowing the knob 7 of the adjusting bolt F to be rotated are formed opposite to each other at an intermediate portion in the axial direction. The upper end opening of the adjustment bolt holder B ₃ is closed by the cap body 11. Adjusting bolt holder B ₃ of the lower end portion a female screw portion 6 in the adjusting bolt male screw portion 12 of the F in is screwed, in a state where the engagement position of the adjusting bolt F with respect to the adjusting bolt holder B ₃ is determined, A set screw 13 for holding the state is screwed to the lower end portion of the adjustment bolt holder B _{3 in} the direction perpendicular to the axis, and the leading end surface of the set screw 13 is the outer peripheral surface of the male screw portion 12 of the adjustment bolt F. Abut.

Upper and lower ends of the pressure spring K accommodated in the spring holder unit B ₁ represents, is against the spring seat 14 and 15 elastically in the vertical, respectively. A fitting pin portion 16 having a smaller diameter than the other portion formed at the tip portion of the adjustment bolt F is fitted into the recess 14 a of the upper spring seat 14. As shown in FIGS. 2 to 4, the lower spring seat 15 is formed with a test needle insertion hole 17 for partially inserting the upper end portion of the test needle S in a non-penetrating state on the lower end surface thereof. A portion having the test needle insertion hole 17 in the axial direction of the lower spring seat 15 is provided with an annular groove 18 to form a small-diameter portion 19, and the small-diameter portion 19 extends along the radial direction. Many steel ball accommodating holes 21 are formed through. The steel ball accommodating hole 21 is in a state where the steel ball 22 is accommodated, and the steel ball 22 contacts the outer peripheral surface of the upper end portion of the test needle S inserted into the test needle insertion hole 17 and does not come out inward. As described above, the diameter gradually decreases toward the test needle insertion hole 17. Further, an O-ring 23 is fitted on the outside of each steel ball 22 in a state where the steel balls 22 are accommodated in a large number of steel ball accommodating holes 21, and each steel ball 22 is tightened by the tightening force of the O-ring 23. configuration but by being pressed against the outer circumferential surface of the test needles S, in a state in which the test needles S is integrated with respect to the lower spring seat 15, the test needle S is not exit from the test needle holder section B ₂ by its own weight It has become. Therefore, in a state where the steel ball 22 is received in each steel ball receiving hole 21 of the lower spring seat 15 and the steel ball 22 is in contact with the outer peripheral surface of the test needle S, a part of the outside of the steel ball 22 is The lower spring seat 15 slightly protrudes from the circumferential surface of the annular groove 18.

The lower spring seat 15 is in contact with the upper end surface of the test needle holder B ₂ by the urging force (restoring force) of the compression spring K during a non-test, and includes a distal end portion (lower end portion) including the pierced portion Sa of the test needle S. ) Protrudes from the lower end surface 5 of the measuring tool body B by a set length (in the above embodiment, the total length of the test needle S is 100 mm, whereas the length of the test needle S when it is not tested is 14 mm. together), at the time of testing, spaced apart from the upper end surface of the test needle holder section B ₂ against the urging force of the compression spring K (restoring force), the protruding length of the test needle S is shortened.

The measuring tool M ₁ having the above configuration has a cylindrical shape with an outer diameter of 30 mm and a total length of 240 mm, and the weight is 850 g. For this reason, the wearability of the rock R can be measured by one operator by pressing the rock R with a force of 70 N and sliding it to the side while holding the measuring tool M ₁ .

In the “CERCHAR test”, since the pressing force of the test needle S against the rock R is set to 70 N, it is necessary to set the compression amount of the compression spring K. For this setting, for example, a compression spring biasing force setting device C shown in FIGS. 7 and 8 is used. In the setting device C, the measuring tool M ₁ is erected on the base plate 71 in an inverted posture, and a portion that becomes a lower end portion when used in the measuring tool M ₁ slightly protrudes from the measuring tool insertion hole 73 of the upper plate 72. A frame 75 in which the base plate 71 and the upper plate 72 are connected by a plurality of connecting rods 74, and a reference weight J having the same weight as the set urging force of the compression spring K. The weight holder 76 is provided integrally with the upper plate 72 to support the upper plate 72 so as to be movable up and down. In the weight holder 76, three support columns 77 arranged on the same circumference are erected on the upper plate 72, and a ring plate 78 is connected to the upper end portion of each support column 77. A columnar reference weight J is supported so as to be movable up and down. The reference weight J has a weight that generates a load of 70 N, and moves up and down by holding a T-shaped lifting tool 79 integrally provided on the upper end surface by hand.

Then, the test needle S of the measuring tool M ₁ is replaced with an urging force setting needle S ′ having a flat end face protruding from the lower end surface of the measuring tool main body B, and stands on the base plate 71 of the frame 75 in an inverted posture. In this state, the lower end portion of the upper plate 72 protrudes slightly upward from the measuring instrument insertion hole 73 in use, and the reference weight J is applied to the urging force setting needle S ′ of the measuring instrument M ₁ . Thus, the biasing force (restoring force) of the compression spring K is adjusted by the adjusting bolt F of the measuring tool M ₁ so that the piercing portion Sa ′ of the biasing force setting needle S ′ and the lower end surface 5 of the measuring tool body B are the same. ). As a result, if the weight of the urging force setting needle S ′ is ignored, the urging force (restoring force) of the compression spring K becomes equal to the value of the load that the reference weight J exerts on other objects due to the gravitational action, and becomes 70N. .

The dimension of the setting device C described above is (vertical × horizontal × height) = (300 × 300 × 400) mm, and the weight is about 20 kg including the reference weight J. Therefore, the measuring tool M ₁ It is also possible to set the compression spring on the spot by bringing it in place.

Although the above-described portable measuring tool M ₁ can be held by a single operator and performed as it is, the measuring auxiliary tool E shown in FIGS. 1 and 5 is used. Then, it is considered that the measuring tool M ₁ can be slid reliably while the test needle S is pressed against the rock R, and the test accuracy is also improved. The auxiliary tool body 31 in the shape of a rectangular thick plate constituting the measurement auxiliary tool E is deformed such as rubber, foamed plastic or the like so as to be deformable corresponding to the surface shape of the rock R which is often not an accurate plane. A rectangular slide recess 32 is formed in the longitudinal direction of the auxiliary tool body 31 at the center of the cylindrical measurement tool body B, and is formed at the center of the slide recess 32. In this, a track-like piercing portion through-hole 33 for inserting the piercing portion Sa at the tip of the test needle S is formed so as to penetrate therethrough. Inner surfaces and bottom surface of the slide concave portion 32 is severely damaged by the measuring instrument M ₁ slides, when the surface of the rock is not planar, it is preferably covered with a metallic protective plate 34.

  In addition, when the surface of the rock is flat, it is not necessary to provide only a measuring tool main body and provide a metal protection plate. Further, the shape of the slide recess 32 formed in the auxiliary tool body 31 is not limited to a rectangular shape, and may be a “track shape” corresponding to the diameter of the test needle S. Here, the “track shape” is a shape in which a pair of arcs having a central angle of 180 ° are arranged opposite to each other and both ends of both arcs are connected by a straight line.

The measurement auxiliary tool E is attached to a measurement site on the surface of the rock R via a double-sided tape 35 attached to the back surface thereof, and performs measurement work in a temporarily fixed state. When the surface of the rock R is deformed with respect to the plane, the auxiliary tool body 31 is temporarily fixed to the surface of the rock R in a deformed state following the surface shape of the rock R. In this state, when the distal end portion (lower end portion) of the measurement tool main body B is partially inserted into the slide recess 32 of the measurement auxiliary tool E, the protruding portion of the test needle S is inserted into the piercing portion through-hole portion 33. In this state, when the measuring tool M ₁ held by the hand is pierced into the rock R until the test needle S is slightly retracted with respect to the measuring tool main body B, the test needle S is 70 N against the rock R. When it is slid by the stroke L ₀ (10 mm) along the slide recess 32 as it is, a groove-like streak 81 is formed on the surface of the rock R, and the tip of the test needle S is worn. Is deformed into a planar shape having a diameter (Wc) (see FIG. 6). As described above, the wear ability of the rock R by the “CERCHAR test” is calculated from the diameter (Wc). In FIG. 6, D indicates the depth of the groove-shaped streak 81 formed in the rock R, and 82 indicates a peeled portion generated in the rock R.

As described above, according to the measuring tool M ₁ of the present embodiment, the wear ability of the target rock R can be measured in situ and by a single measurer, so that the specimen body sampled from the target rock is shaped and processed. It is no longer necessary to obtain specimens, and data related to the wear ability of rocks can be acquired in a short time without altering the rock, and data relating to multiple types of wear ability of different parts of the same target rock can be obtained. Data can be acquired in a short time, and the reliability of data is improved.

Further, since the tip surface of the test needle S is deformed into a flat shape every time measurement is performed, the test needle S is replaced when the next test is performed. Since the test needle S has a structure in which a large number of steel balls 22 are pressed against the outer peripheral surface of the upper end portion of the test needle S by the elastic force of the O-ring 23, so that it does not come out of the test needle holder B ₂ due to its own weight. When the protruding portion of the test needle S is pulled with a large force, the test needle S is pulled out. When a new test needle S is inserted into the test needle insertion hole 4 of the test needle holder B ₂ , a large number of steel balls 22 slightly facing the inner peripheral surface of the test needle insertion hole 17 of the lower spring seat 15 are obtained. The O-ring 23 is slightly retracted against the elastic force of the O-ring 23, and the elastic force of the O-ring 23 acts on the upper end of the new test needle S via a number of steel balls 22. The test needle S cannot be pulled out by its own weight. As described above, the measuring tool M ₁ having the above-described configuration can easily replace the old and new test needles S. In addition, although the old and new test needles S can be easily exchanged, the test needles S do not come out when being carried, so that they can be used safely.

The means for preventing the test needle S having the upper end portion inserted into the test needle insertion hole 17 of the lower spring seat 15 from coming out of the test needle holder portion B ₂ is the above-described many steel balls 22 and O-ring 23. It is not limited to the structure related to the combination. Other means for preventing the test needle S from being pulled out include a screw that is screwed into the lower spring seat 15 in the direction perpendicular to the axis and whose tip is in contact with the outer peripheral surface of the upper end of the test needle S.

Next, with reference to FIGS. 9 to 12, a measuring tool M ₂ provided with a slide guide body G and having a variable stroke of the test needle S will be described. The measuring tool M ₂ has the same structure as the measuring tool M ₁ , but a step 41 is formed at the lower end of the test needle holder B ₂ ′, and the step of the measuring tool support N is formed by the step 41. It is supported by the stepped portion 43 of the through hole 42. On the other hand, the slide guide body G has a rectangular frame shape, and one short side portion is divided with respect to the other U-shaped guide body main body 44 to become a divided short side body 45. is there. Guide grooves 46 into which the guide body main body 44 is inserted are formed on both side surfaces of the lower part of the measuring tool support N divided in two. A trapezoidal block portion 47 is integrally formed at the center portion of the slide guide body G in the short direction on the upper surface of the divided short side body 45, and each corner portion on the lower side is omitted so that the assembly concave portion 48 and It has become. Therefore, when the respective free end portions of the guide body main body 44 are inserted into the respective assembly recesses 48 of the divided short side body 45 and the divided short side body 45 and the guide body main body 44 are assembled together via the bolts 49. The slide guide body G is obtained.

A stopper body V for making the stroke of the measuring tool M ₂ variable during the test is attached to the inner surface of the block portion 47 of the divided short side body 45. In the stopper body V, a fixing bolt 52 is integrally attached to the center of the disk body 51, and long and short stroke variable pins 53 and 54 are attached to the same circumference of the disk body 51 having different 180 ° phases. . Corresponding to the structure of the stopper body V, a through hole 55 of the fixing bolt 52 is formed at the center of the block 47 of the divided short side body 45 to which the stopper body V is integrally attached. The three through-holes 56a, 56b, 56c into which the stroke variable pins 53, 54 can be inserted are formed by shifting the phase by 90 ° about the through-hole 55 and facing the through-hole 56b ( A partial insertion hole 57 into which only the tip portions of the long and short stroke variable pins 53 and 54 described above can be inserted is formed in a portion where the phase is shifted by 180 °. Reference numeral 58 denotes a nut that is screwed to the fixing bolt 52 of the stopper body V when the stopper body V is assembled to the divided short side body 45 integrally.

In addition, spike needles 59 that can pierce the rock R are attached to the short side portions of the guide body main body 44 and the back surfaces of the divided short side bodies 45 by screws, respectively, as shown in FIG. A pair of spike needles 59 are pierced on the surface of the rock R, the slide guide body G is temporarily fixed to the rock R, and the test needle S is pierced against the rock R with a force of 70 N. the slide guide body and slide the measuring instrument M ₂ along the G, measurement is performed to form a groove-like streaks on the surface of the rock.

12A to 12C show changes in the stroke of the measuring tool M ₂ during measurement. FIG. 12A shows a state where the stroke L ₂ (= 15 mm) is the longest. In this case, the long and short stroke variable pins 53, 54 of the stopper body V are inserted into the through holes 56 a, 56 c of the divided short side body 45, and the stopper body V is attached to the inner side surface of the divided short side body 45. The divided short side body 45 and the stopper body V are integrated with the side surfaces in contact with each other.

FIG. 12B shows the state of the stroke L ₀ (= 10 mm) with the highest measurement frequency. In this case, the stroke variable pin 54 on the short side of the stopper body V is partially inserted into the partial insertion hole 57, the tip of the stroke variable pin 54 is in contact with the bottom surface of the partial insertion hole 57, and the long side With the stroke variable pin 53 inserted into the through hole 56b, the divided short side body 45 and the stopper body V are integrated. For this reason, a predetermined gap is formed between the stopper body V and the divided short side body 45.

FIG. 12C shows a state in which the stroke L ₁ (= 5 mm) is the shortest, and the stopper body V is only 180 ° with respect to the stroke L ₀ (= 10 mm) having the highest measurement frequency. By rotating, the long stroke variable pin 53 is partially inserted into the partial insertion hole 57, and the tip of the stroke variable pin 53 is in contact with the bottom surface of the partial insertion hole 57.

  In the above embodiment, a compression spring is used as the “test needle urging means” for securing a puncture force of 70 N to the test needle S, but in the present invention, “with test needle” Measure means such as shock absorbers using air pressure, because it is sufficient to apply a puncture force of the set value (70N) to the test needle S on the premise that the urging means is portable and can adjust the urging force. It is also possible to interior the tool body.

B: Measuring tool body
B ₁ : Spring holder part
B _2: Test needle holder
B _3: adjusting bolt holder
C: Compression spring biasing force setting device
E: Measuring aid
F: Adjustment bolt (spring biasing force adjuster)
G: Slide guide body
J: Reference weight
K: Compression spring L ₀ , L ₁ , L ₂ : Test needle stroke
M ₁ and M ₂ : Measuring tools
N: Measuring tool support
R: Rock
S: Test needle
Sa: The puncture part of the test needle
S ': Energizing force setting needle
V: Stopper body
15: Lower spring seat
21: Steel ball receiving hole
22: Steel ball
23: O-ring
31: Auxiliary tool body
32: Slide recess
33: Piercing part through-hole part
34: Protection plate
35: Double-sided tape (adhesive)
41: Stepped part of measuring tool
44: Guide body
45: Divided short body 53, 54: Stroke variable pin
59: Spike needle
71: Base plate
72: Upper plate
74: Connecting rod
75: Frame
76: Weight holder

Claims (6)

A cylindrical measuring instrument body,
The tip of the steel bar is a pierced part formed in a conical shape, and the remaining part excluding the tip of the steel bar is formed steplessly, and the maximum protrusion length is on the tip side of the measuring tool body. A test needle that is housed in a restricted state and accessible;
In order to bias the test needle in the protruding direction, a test needle biasing means housed in the measuring tool body,
A test needle extraction preventing means for preventing the test needle from coming out of the measuring tool body due to its own weight;
In order to adjust the urging force of the test needle urging means, the urging force adjusting means integrally provided on the opposite side of the test needle in the measuring tool body,
A portable rock wear measuring instrument that can measure the wear ability of rocks in-situ,
The test needle biasing means is a compression spring,
The test needle extraction prevention means is accommodated in a lower spring seat that is elastically contacted with a lower end portion of the compression spring, and contacts the outer peripheral surface of the upper end portion of the test needle that is partially fitted to the lower spring seat. A portable rock wear measuring instrument comprising: a plurality of small steel balls in contact with each other; and an annular elastic ring that is mounted on the outside of the plurality of small steel balls to ensure the contact force. A stepped portion at the lower end of the measuring tool body is inserted and supported, and includes a measuring tool support that is slidably attached to a rectangular frame-shaped slide guide body,
The portable rock wear ability according to claim 1, wherein spike needles that are pierced by rocks at the time of measurement are provided at both ends along the slide direction of the measuring tool on the back surface of the slide guide body. Measuring tool. The slide guide body is a divided short side body in which one short side portion is divided with respect to the remaining portion, and a stopper body is detachably assembled inside the divided short side body,
On the surface of the stopper body that faces the divided short side body, there are one or a plurality of stroke variable pins having different lengths for changing the distance of the divided short side body to change the stroke of the measuring tool. Protruding,
In the state where the specific stroke variable pin of the stopper body is in contact with the inner side surface of the divided short side body, the stopper body is detachably assembled to the divided short side body, thereby attaching the measuring tool support The portable rock wear capacity measuring tool according to claim 2, wherein the stroke of the supported measuring tool is adjustable. When measuring the wearability of a rock in the original position using the portable rock wearability measuring instrument according to any one of claims 1 to 3, the measurement aid is used by temporarily fixing the surface of the rock. Tools,
The auxiliary tool main body is entirely composed of an elastic material, the bottom surface is formed in a flat shape, and can be temporarily fixed to the surface of the rock via an adhesive tool.
A slide recess is formed in the center of the auxiliary tool body so that the lower end of the measurement tool body can be inserted without a gap so that the measurement tool body can slide in a specific direction. The piercing portion insertion hole portion into which the conical piercing portion at the tip of the test needle can be inserted is formed in the specific direction, and the bottom surface and the inner side surface of the slide concave portion are covered with a protective plate. A measuring aid.   The measurement auxiliary tool according to claim 4, wherein a bottom surface and an inner surface of the slide recess are covered with a protective plate. A cylindrical measuring instrument body,
The tip of the steel rod is a pierced portion formed in a conical shape, and on the tip side of the measuring tool main body, a test needle accommodated in a state where the maximum protruding length is regulated,
In order to bias the test needle in the protruding direction, a compression spring housed in the measuring tool body,
A test needle extraction preventing means for preventing the test needle from coming out of the measuring tool body due to its own weight;
In order to adjust the urging force of the compression spring , the urging force adjusting means integrally provided on the opposite side of the test needle in the measuring tool body,
A device for setting the urging force of the compression spring of a portable rock wear measuring instrument capable of measuring the wear ability of a rock in its original position to be a set value,
The measuring tool is erected on the base plate in an inverted posture, and the portion that becomes the lower end portion when used in the measuring tool has a spacing that slightly protrudes from the measuring tool insertion hole of the upper plate, A frame in which the upper plate is connected by a plurality of connecting rods;
In order to support a reference weight having the same weight as the set biasing force of the compression spring so as to be movable up and down, a weight holder provided integrally with the upper plate,
Consisting of
Replace the test needle of the measuring tool with a biasing force setting needle with a flat end surface, and stand upright on the base plate of the frame so that the lower end when used is from the measuring tool insertion hole of the upper plate. In a state where the reference weight is applied to the biasing force setting needle of the measuring tool while slightly protruding upward, the end surface of the biasing force setting needle and the end surface of the measuring tool body are the same. A compression spring biasing force setting device for a portable rock wear measuring instrument, characterized in that the biasing force of the compression spring is adjusted by means for adjusting the biasing force of the measuring tool.

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