JP2015121453A - Artificial lawn testing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial lawn testing machine capable of attaching various friction bodies with a different surface nature to a friction element and testing the durability of an artificial lawn.SOLUTION: A friction element for accelerating abrasion of a test piece rubbed against the test piece of an artificial lawn is formed with a rotation part having a circular outer peripheral surface and a sheet-like friction body wound around this outer peripheral surface. A groove part depressed toward the inner side is formed on the outer peripheral surface of the rotation part in the axial direction. An end part of the friction body is inserted into the inner side of this groove part, and this end part is sandwiched and attached between an inner surface of the groove part and an attachment member. The attachment member is taken out from the groove part, and the friction body is taken out and disconnected, and the end part of another friction body having a different surface nature is inserted into the groove part so as to be sandwiched between the attachment member and the inner surface of the groove part.

Description

  The present invention relates to an artificial lawn testing machine for testing the abrasion resistance performance of an artificial lawn, which accelerates deterioration by rubbing a wear piece onto a test body of the artificial lawn.

  An artificial lawn laid in a stadium needs to have durability that can withstand use in sports performed in the stadium, and various configurations are disclosed for testing machines for testing the performance.

  For example, Patent Document 1 includes a test piece of artificial turf laid in tension on a test bench and a roller that reciprocates while rotating with a certain load applied to the test piece of artificial turf. An artificial turf durability tester characterized in that spikes of various sports spike shoes can be directly planted on the rim of the roller is disclosed.

JP-A-6-43081

  However, the artificial turf durability tester disclosed in Patent Document 1 can be effectively tested in the event of having a spike in a competition shoe such as soccer, but it is difficult to test the event using a shoe without a spike such as tennis.

  Therefore, the present invention provides an artificial lawn testing machine that can test the durability in any competition.

In order to achieve the above object, the present invention is configured as follows.
That is, the artificial lawn testing machine according to the present invention is an artificial lawn testing machine for testing the abrasion resistance performance of the artificial lawn,
A wearer that rubs against the artificial grass specimen and promotes the wear of the specimen;
The wear piece includes a rotating part having a circular outer peripheral surface that is rotatable in a circumferential direction and orthogonal to a rotation axis, and a sheet-like friction body wound around the outer peripheral surface of the rotating part. Provided that the friction body rotates and moves in a direction perpendicular to the rotation axis and is continuously rubbed against the test body,
On the outer peripheral surface of the rotating part, a groove part recessed inward is formed in the axial direction,
An attachment member that is detachably attached to the rotating part is housed and attached to the groove part,
The end of the friction body is inserted into the inside of the groove, and the end is narrowed between the inner surface of the groove and the mounting member, and the friction body is attached to the rotating portion. It is characterized by.

According to the artificial lawn testing machine according to the present invention, a rotating part that is rotatable in the circumferential direction and has a cross section in a direction perpendicular to the rotation axis and having a circular outer peripheral surface, and the outer peripheral surface of the rotating part A sheet-like friction body to be wound around, and while the rotating part rotates, the friction body continuously moves to the artificial lawn specimen while moving in a direction perpendicular to the rotation axis. Since it is provided so as to be rubbed, wear according to the surface properties of the friction body can be given to the test body, and wear resistance tests corresponding to various competitions can be performed.
In addition, a groove portion recessed inwardly on the outer peripheral surface of the rotating portion is formed in the axial direction, the attachment member is housed in the groove portion, and is detachably attached, and the end portion of the friction body is inserted inside the groove portion. In addition, the friction member is attached to the rotating portion by narrowing the end portion between the inner surface of the groove portion and the attachment member, so that the friction body is attached by removing the attachment member from the groove portion. Can be pulled out from the groove and removed. Then, an end portion of another friction body having a different surface property is inserted into the groove portion to the groove portion of the rotating portion from which the friction body has been removed, so as to be tightly fitted between the mounting member and the inner surface of the groove portion. It is possible to easily attach various friction bodies to the rotating part and perform an abrasion resistance test.

Further, a plurality of the groove portions are arranged in the circumferential direction of the rotating portion, and formed.
One end portion of the friction body is inserted into the groove portion and attached by an attachment member, and the other end portion of the friction body is inserted into another groove portion different from the groove portion and attached by the attachment member. After attaching the part to the groove part, the other end part of the friction body is attached to another groove part in a tensioned and tensioned state, so that it can be attached to the rotating part so that the friction body does not sag.

The inner surface of the groove is provided with a bottom surface and two inner surfaces extending upward from both ends of the bottom surface to reach the opening edge, and the groove width increases from the bottom surface to the opening edge. Formed into a trapezoidal cross section,
The mounting member is formed in a trapezoidal cross section having an upper surface, a lower surface, and two outer surfaces formed at positions corresponding to the inner surfaces of the groove portion, and the groove portion penetrates the upper surface and the lower surface. If the attachment member is attached to the groove portion by a screw that is screwed into the bottom surface of the attachment member, the closer the attachment member is to the bottom surface side of the groove portion by tightening the screw, the more the outer surface of the attachment member and the inner side surface of the groove portion become. This is preferable because the gap is narrowed and various friction bodies having different thicknesses can be easily attached while being narrowed between them.

  According to the artificial lawn testing machine according to the present invention, it is possible to test the durability of the artificial lawn by attaching various friction bodies having different surface properties to the wearer.

The outline | summary of the artificial lawn testing machine which concerns on this invention is shown, (A) is a top view, (B) is a front view. It is a top view which shows the abrasion element of FIG. It is AA sectional drawing of FIG. FIGS. 2 and 3 show the attachment members, (A) is a plan view, (B) is a front view, and (C) is a side view. It is sectional drawing which shows the rotation part before attaching a friction body. It is a figure which shows the state which inserted one edge part of the friction body in the groove part of FIG. It is a figure which shows the state which attached the attachment member of FIG. 4 to the groove part of FIG. It is a figure which shows the state which inserted the other edge part of the friction body of FIG. 7 in the groove part, and attached the attachment member.

Embodiments of the present invention will be specifically described with reference to the drawings.
T is an artificial lawn testing machine.
The artificial lawn testing machine T of the present embodiment has a gantry part 1 on which a test piece P as an artificial turf specimen is mounted and attached, and a wearer 3, and the artificial turf test attached to the gantry part 1 is tested. A carriage unit 2 that rubs the wearer 3 from above the piece P is provided.
The gantry 1 includes a table 12 having a flat upper surface on which the artificial grass test piece P is mounted, and a support portion 11 that supports the table 12, and a base fabric p2 of the artificial grass test piece P. Is attached to the table 12 with the turf yarn p1 planted on the base fabric p2 facing upward.

The carriage unit 2 of the present embodiment includes two wear pieces 3, that is, a wear piece 3 a arranged on the left side in FIG. 1 and a wear piece 3 b arranged on the right side, and each wear piece 3 a, 3 b is framed 21. It is attached to.
Each wear piece 3a, 3b of the present embodiment includes a rotating part 5 formed in a columnar shape, and columnar rotating shafts 4 protruding from both ends of the rotating part 5, respectively. It is provided so as to be able to rotate in the circumferential direction around the rotating shafts 4 protruding from the center.
The wear pieces 3a and 3b are respectively attached to the frame body 21 with the rotation shafts 4 protruding from both ends thereof, and the axial directions of the rotation shafts 4 are arranged in parallel. ing. Specifically, the respective wear pieces 3a and 3b are arranged in parallel in the left and right direction in the drawing with the axial direction of the respective rotation shaft 4 in the drawing in FIG.

The carriage unit 2 is mounted above the gantry unit 1 by placing the rotating units 5 of the wear pieces 3a and 3b on a test piece P of an artificial lawn mounted on a table 12. Yes.
The carriage unit 2 is provided so as to roll the rotating unit 5 of each of the wear pieces 3a and 3b on the test piece P by moving the frame body 21 in the lateral direction. The artificial lawn testing machine T of the present embodiment is provided so as to reciprocate the frame body 21 of the carriage unit 2 in the left-right direction in the drawing by a drive source (not shown) in FIG.
In addition, the friction body 6 shown in drawing after FIG. 2 is attached to the outer peripheral surface of each rotating part 5 of each wearer 3a, 3b, respectively, and by rotating the rotating part 5 on the test piece P, The test piece P is provided so as to be rubbed against the friction body 6.

Gears 41 are respectively attached to the rotating shafts 4 of the wear pieces 3a and 3b.
Specifically, a gear 41a is attached to one rotating shaft 4 protruding from the rotating portion 5 in the wearer 3a, and a gear is connected to one rotating shaft 4 protruding from the rotating portion 5 in the wearer 3b. 41b is attached.
The gears 41a and 41b are arranged in a lateral direction with the wear pieces 3a and 3b attached to the frame body 21, and a ring-shaped endless chain C is bridged between the gears 41a and 41b arranged side by side. These are wound around the gears 41a and 41b.
Note that a drive source such as a motor for rotating the wear elements 3a, 3b is not connected to the wear elements 3a, 3b and the endless chain C. The wear pieces 3a and 3b are provided so as to roll the rotating portion 5 on the test piece P of the artificial lawn and to rotate in the circumferential direction by the reciprocating movement of the frame body 21 of the carriage portion 2.

The gear 41a and the gear 41b have different numbers of teeth. Specifically, the gear 41a is formed with 15 teeth, and the gear 41b is formed with 21 teeth.
By attaching the endless chain C to the gears 41a and 41b, the rotating parts 5 rotate at different rotational speeds when the wearers 3a and 3b rotate.
By providing each of the wear pieces 3a and 3b in this way, when the frame body 21 is moved laterally on the artificial lawn test piece P attached to the gantry 1, one of the wear pieces 3a and 3b is obtained. The rotating part 5 rolls on the test piece P, and the other rotating part 5 rotates in conjunction with driving through the endless chain, so that the friction body 6 on the outer peripheral surface slides on the upper surface of the test piece P. Can be rubbed. That is, the friction body 6 attached to the outer peripheral surface of the rotating part 5 of each wearer 3a, 3b can be more efficiently rubbed against the upper surface of the artificial grass test piece P.
The wear elements 3a and 3b of the present embodiment are formed so that the number of teeth of the gears 41a and 41b attached to the rotating shaft 4 is 15 and 21, respectively. May be provided.

  The artificial lawn testing machine T of the present embodiment is provided so that the frame body 21 can be reciprocated at a set arbitrary speed, for example, at 0.25 m / s.

Further, the gantry unit 1 of the artificial lawn testing machine T according to the present embodiment can move the table 12 above the support unit 11 and can reciprocate the table 12 in the lateral direction perpendicular to the reciprocating direction of the frame body 21. It is provided as follows.
That is, the gantry 1 of the present embodiment is provided so as to reciprocate the table 12 in the vertical direction in the figure in FIG.
The gantry unit 1 is provided so that the table 12 can be reciprocated in the vertical direction in the figure as described above at an arbitrary set speed, for example, 0.015 m / s.
By providing the table 12 in this way, the friction bodies 6 of the respective wearers 3a and 3b can be rubbed more evenly on the upper surface of the artificial grass test piece P attached to the table 12.

2 is a plan view showing the wearer 3a of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line AA of FIG.
The wearer 3b differs from the wearer 3a only in the number of teeth of the gear 41b attached to the rotating shaft 4, and the other components have the same configuration as the wearer 3a.

A groove portion 51 that is recessed inward is formed on the outer peripheral surface of the rotating portion 5, and the groove portion 51 has the same cross-sectional shape over the entire length of the rotating portion 5 along the axial direction of the columnar rotating portion 5. It is formed.
The groove 51 is formed in a rectangular cross-sectional shape having a bottom surface 53 and two inner side surfaces 52 extending from both ends of the bottom surface 53 toward the opening side, and each opening edge of each inner side surface 52 from the bottom surface 53. It is formed in a trapezoidal cross section in which the groove width increases toward 54.
In addition, each said opening edge 54 forms the corner | angular part which each inner side surface 52 and the outer peripheral surface of the rotation part 5 connect in the round shape over the full length of the groove part 51, and each inner side surface 52 and the bottom face 53 have it. A corner portion to be connected is formed in a rounded shape over the entire length of the groove portion 51.

Four grooves 51 are formed in the rotating part 5 of the present embodiment. Specifically, two sets of groove portions 51a and 51b and two sets of groove portions 51c and 51d and two sets of groove portions 51 are formed.
On the outer peripheral surface of the rotating part 5, the groove part 51a and the groove part 51b are arranged at a slightly smaller interval than a half circumference, and the groove part 51c and the groove part 51d are spaced apart by the same size as the interval between the groove parts 51a and 51b. Formed.
Further, on the outer peripheral surface of the rotating part 5, the groove part 51a and the groove part 51c are arranged with a half circumference interval, and the groove part 51b and the groove part 51d are arranged with a half circumference interval.
That is, the groove portions 51a to 51d are formed such that the interval between the groove portions 51 formed in a pair is larger than the interval between the groove portions 51 of different sets. Specifically, the distance between the groove 51a and the groove 51b formed as a set of two pieces, the distance between the groove 51c and the groove 51d, and the distance between the groove 51a and the groove 51d and the distance between the groove 51b and the groove 51c are determined. Is also arranged to be larger.

The friction body 6 attached to the rotating portion 5 is formed in a rectangular sheet shape and is wound around the outer peripheral surface of the rotating portion 5 and attached.
The friction body 6 of this embodiment is provided with a synthetic rubber sheet, and is formed by arranging a large number of concave grooves 65 on the surface thereof.
Note that the material of the friction body 6 is not limited to synthetic rubber, and may be formed by appropriately selecting or combining materials such as synthetic resin or metal other than synthetic rubber, and selecting or combining concave grooves or protrusions. It may be formed on the surface.

The friction body 6 is wound on the outer peripheral surface of the rotating portion 5 with the front surface facing outward and the back surface contacting the rotating portion 5 to be wound.
Two rotating bodies 6a and 6b are attached to the rotating portion 5 of the present embodiment side by side in the circumferential direction at intervals.
The rotating unit 5 includes five friction bodies 6 a and five friction bodies 6 b arranged side by side in the axial direction of the rotating unit 5.
That is, a total of ten friction bodies 6 are attached to the rotating portion 5 of the present embodiment.

The friction bodies 6 a and 6 b are attached by inserting end portions 61 and 62 along the axial direction of the rotating portion 5 into the groove portion 51.
Specifically, the friction body 6a allows one end 61 to be inserted into the groove 51a and the other end 62 to be inserted into the groove 51b formed as a pair with the groove 51a. ing. The friction body 6b has one end 61 inserted into the groove 51c and the other end 62 inserted into the groove 51d formed as a pair with the groove 51c.
The end portions 61 and 62 of the friction bodies 6a and 6b are tightly attached between the mounting members 7 attached to the inner sides of the groove portions 51a to 51d and the inner surfaces of the groove portions 51a to 51d, respectively. It is attached so as not to come out from the inner side of .about.

4 shows the attachment member 7 of FIGS. 2 and 3, (A) is a plan view, (B) is a front view, and (C) is a side view.
The mounting member 7 of the present embodiment is formed in a long body having a rectangular cross-sectional shape, and includes an upper surface 74 and two outer surfaces 72 connected to both ends of the upper surface 74 and extending downward. The lower surface 73 which connects both ends to the lower end of each outer side surface 72 is provided.

The mounting member 7 is formed in a trapezoidal cross-sectional shape in which the distance between the two outer surfaces 72 becomes narrower from the upper surface 74 to the lower surface 72.
In detail, each said outer side surface 72 is formed in the position corresponding to the two inner side surfaces 52 of the groove part 51 formed in the rotation part 5 of the said wear element 3a, 3b, and the said attachment member 7 is a groove part. Each outer side surface 72 is formed so as to be arranged in parallel with each inner side surface 52 when mounted in 51.

The mounting member 7 is formed with a circular through hole 71 penetrating from the upper surface 74 to the lower surface 73, and a screw N inserted through the through hole 71 is screwed into the bottom surface 53 of the groove portion 51. As shown in FIG. 3, the attachment member 7 is provided to be attached to the groove 51.
The through-hole 71 is provided with a small-diameter portion 76 in the lower portion and a large-diameter portion 75 having an inner diameter larger than that of the small-diameter portion 76 in the upper portion, and the male screw portion of the screw N is inserted into the small-diameter portion 76. The screw head of the screw N is formed so as to be housed inside the large-diameter portion 75.
Two through-holes 71 are formed in the attachment member 7 of the present embodiment at intervals in the longitudinal direction.

FIG. 5 is a cross-sectional view showing the rotating portion 5 before the friction body 6 is attached.
Screw holes 55 each having a female screw into which the screw N can be screwed are formed in the bottom surface 53 of each of the groove portions 51 a to 51 d of the rotating portion 5, and the screw hole 55 is formed in the mounting member 7. Two pieces are formed as a set in an arrangement corresponding to the two through holes 71 formed.
As shown in FIG. 2, the rotating portion 5 of this embodiment is provided so that five attachment members 7 are attached to one groove portion 51. Five sets of ten screw holes 55 are formed in one groove 51, and a total of 20 sets of 40 screw holes 55 are formed in the entire rotary unit 5 including four grooves 51a to 51d.

6 is a view showing a state in which one end 62 of the friction body 6b is inserted into the groove 51d of FIG.
As shown in FIG. 6, with one end 62 of the friction body 6b inserted into the groove 51d, the mounting member 7 is inserted into the groove 51d, and a screw N is inserted into each through hole 71 of the mounting member 7. The end portion 62 of the friction body 6b can be attached to the rotating portion 5 by being inserted and screwed into the screw holes 55 of the groove portion 51d.

7 is a view showing a state in which the attachment member 7 of FIG. 4 is attached to the groove 51d of FIG.
As shown in FIG. 7, the friction body 6 b is attached to the rotating portion 5 with the end portion 62 narrowly interposed between the attachment member 7 and the inner surface of the groove portion 51 d. The portion 62 is attached tightly between the outer surface 72 of the mounting member 7 and the inner surface 52 of the groove 51d.
Since the wear elements 3a and 3b of the present embodiment are formed so that the two outer surfaces 72 of the mounting member 7 are arranged in parallel to the inner surfaces 52 of the grooves 51a to 51d, A portion where the force concentrates on the end portion 62 of the friction body 6b to be tightly fitted between the side surface 72 and the inner side surface 52 hardly occurs, and damage to the friction body 6b can be suppressed.

The wear elements 3a and 3b of the present embodiment are the outer peripheral surface of the rotating part 5 between the groove part 51d and the groove part 51c, in which the friction body 6b having one end 62 attached to the groove part 51d is formed as a pair. And the other end 61 is inserted into the groove 51c and attached.
The attachment of the end 61 to the groove 51c is performed in the same manner as the attachment of the end 62 to the groove 51d. That is, the attachment member 7 is inserted into the groove portion 51c in which the end portion 61 of the friction body 6 is inserted, and the screw N is inserted into each through hole 71 of the attachment member 7 and screwed into the screw hole 55 of the groove portion 51c. Thus, the end portion 61 can be attached to the rotating portion 5.
FIG. 8 is a view showing a state in which the attachment member 7 is attached by inserting the other end 61 of the friction body 6b of FIG. 7 into the groove 51c.
As described above, the friction body 6b is attached by the two attachment members 7 attached to the groove portion 51c and the groove portion 51d so that the end portions 61 and 62 on both sides thereof do not come out of the groove portions 51c and 51d. Five friction bodies 6 b arranged side by side along the axial direction are attached to the rotating portion 5 by ten attachment members 7.
The attachment of the end portions 61 and 62 of the friction body 6a to the groove portions 51a and 51b is performed in the same manner as the attachment of the friction body 6b to the groove portions 51c and 51d. , 6b are attached to the rotating part 5 to form the wear pieces 3a, 3b having the configuration shown in FIG.

As shown in FIG. 3, the rotating portion 5 of the wearer 3 a, 3 b of the present embodiment is such that the surface of the friction body 6 attached by being wound around the outer peripheral surface is located on the outermost side in the radial direction, and each groove portion 51 a- The attachment member 7 and the screw N attached to 51d are provided so as to be located inside the surface of the friction body 6.
By providing the wear pieces 3a and 3b in this manner, contact of members other than the friction body 6 with the upper surface of the artificial grass test piece P is suppressed, and fluctuations in the load applied to the artificial grass test piece P are suppressed. Yes.

  Further, the rotating part 5 of the wearer 3a, 3b of the present embodiment forms the groove part 51 in a trapezoidal cross section that is arranged so that the distance between the two inner side faces 52 increases toward the opening edge 54. At the same time, the two outer surfaces 72 of the mounting member 7 are formed at positions corresponding to the inner surfaces 52. By providing in this way, the attachment member 7 attached to the inside of the groove portion 51 via the screw N is attached to a position closer to the opening edge 54 side from the bottom surface 53 side, so that the inner surface 52 of the groove portion 51 and the attachment member 7 Since the gap between the outer side surface 72 and the outer side surface 72 is increased, various friction bodies 6 having different thicknesses can be easily narrowed between the outer side surface 72 of the mounting member 7 and the inner side surface 52 of the groove 51 and rotated. It can be attached to part 5 and tested.

  The artificial lawn testing apparatus T according to the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, the wearers 3a and 3b of the embodiment shown in FIGS. 1 to 8 are attached by the attachment member 7 by inserting both end portions 61 and 62 of the friction bodies 6a and 6b into different groove portions 51, respectively. It is not limited to.
For example, only one groove 51 may be formed in the rotating portion 5, and both ends of one friction body 6 wound around the outer peripheral surface may be inserted into the groove 51 and attached by the attachment member 7.
However, the wear pieces 3a and 3b of the artificial lawn testing machine T are caused by slack between the outer peripheral surface of the rotating part 5 and the friction bodies 6a and 6b in order to reduce the fluctuation of the load applied to the test piece P of the artificial lawn. It is preferable that no gap is generated.
1 to 8, the end portions 61 and 62 on both sides of the friction body 6 are respectively inserted into the different groove portions 51 and attached, so that one end portion 61 is provided. Is inserted into the groove 51 and attached by the attachment member 7, and the other end 62 is pulled and tensioned so that no gap is generated between the outer peripheral surface of the rotating part 5 and the friction body 6. Since it can be inserted into the groove 51 and attached by the attachment member 7, it can be easily attached to the rotating part 5 without sagging the friction body 6, which is preferable.
In addition, after attaching one end 61 to the groove 51, the other end 62 is inserted into the other groove 51 to attach the attachment member 7, and then inserted into the through hole 71 of the attachment member 7. By tightening the screw N screwed into the screw hole 55, the end portion 62 of the friction body 6 together with the mounting member 7 that moves by tightening the screw N is drawn toward the back side of the groove portion 51, and the friction body 6 becomes more tensioned. Thus, the effect of eliminating the slack of the friction body 6 can be expected.

  Moreover, although the abrasion elements 3a and 3b of embodiment shown to FIGS. 1-8 are arrange | positioned by arrange | positioning the two friction bodies 6a and 6b in the circumferential direction of the rotation part 5, respectively, it is not restricted to this, One friction body 6 may be wound around the outer peripheral surface of the rotating portion 5 and attached, or three or more friction bodies may be arranged in the circumferential direction of the rotating portion 5 and attached thereto.

  Moreover, although the abrasion elements 3a and 3b of embodiment shown in FIGS. 1-8 make the rotating part 5 and each rotating shaft 4 which each protrudes from the both ends integrally with metal, it is not restricted to this. . For example, the rotating portion 5 may be formed in a columnar shape or a cylindrical shape that is separate from the rotating shaft 4, and the rotating shaft 4 may be attached to the rotating portion 5 to form the wear pieces 3 a and 3 b.

DESCRIPTION OF SYMBOLS 1 Base part 11 Support part 12 Table 2 Carriage part 21 Frame 3a, 3b Wear element 4 Rotating shaft 41a Gear 41b Gear 5 Rotating part 51 Groove part 52 Inner side surface 53 Bottom face 54 Opening edge 55 Screw hole 6 Friction body 61 End part 62 End Part 65 Concave groove 7 Mounting member 71 Through hole 72 Outer side surface 73 Lower surface 74 Upper surface 75 Large diameter portion 76 Small diameter portion C Endless chain N Screw P Test piece p1 Turf yarn p2 Base cloth T Artificial lawn testing machine

Claims (3)

An artificial lawn testing machine for testing the wear resistance of an artificial lawn,
A wearer that rubs against the artificial grass specimen and promotes the wear of the specimen;
The wear piece includes a rotating part having a circular outer peripheral surface that is rotatable in a circumferential direction and orthogonal to a rotation axis, and a sheet-like friction body wound around the outer peripheral surface of the rotating part. Provided that the friction body rotates and moves in a direction perpendicular to the rotation axis and is continuously rubbed against the test body,
On the outer peripheral surface of the rotating part, a groove part recessed inward is formed in the axial direction,
An attachment member that is detachably attached to the rotating part is housed and attached to the groove part,
The end of the friction body is inserted into the inside of the groove, and the end is narrowed between the inner surface of the groove and the mounting member, and the friction body is attached to the rotating portion. An artificial lawn testing machine characterized by A plurality of the groove portions are arranged in the circumferential direction of the rotating portion,
One end of the friction body is inserted into the groove and attached by an attachment member, and the other end of the friction body is inserted into another groove different from the groove and attached by an attachment member. The artificial lawn testing machine according to claim 1. The inner surface of the groove includes a bottom surface and two inner surfaces extending upward from both ends of the bottom surface to reach the opening edge, and a trapezoidal shape in which the groove width increases from the bottom surface to the opening edge. Is formed in the cross section of
The mounting member is formed in a trapezoidal cross section having an upper surface, a lower surface, and two outer surfaces formed at positions corresponding to the inner surfaces of the groove, and penetrates the upper surface and the lower surface, The artificial lawn testing machine according to claim 1 or 2, wherein the attachment member is attached to the groove portion by a screw screwed into a bottom surface of the groove portion.

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