JPH08313427A - Device for measuring coefficient of friction of footwear - Google Patents

Abstract

PURPOSE: To measure the coefficient of friction between the sole surface of fixed footwear and a member such as a road or a floor by bringing the sole surface of the footwear into contact with the member and measuring the load generated when the sole surface of the footwear is horizontally moved. CONSTITUTION: A member such as a road or a floor or an ice or snow surface is attached to a testing table 23 and footwear is put in the frame 13A of a U-shaped test piece fixing jig 13 to be fastened and fixed by a fastening screw 13B. Subsequently, an electromagnetic clutch 15 and a feed screw 14 are rotated by a motor 16 fitted with a stepless speed reducer and the test speed of a main rod 11 moved in a horizontal direction is controlled by the screw 14. If necessary, vertical load is applied to the footwear and this load, that is, the resistance force by the friction between the footwear and the member such as the road or the floor is measured by a load sensor 12. The moving distance of the rod 11, that is, the measuring length of the coefficient of friction is adjusted by microswitches 17, 18. The measurement can be performed in such a state that a person wears footwear and the coefficients of static and dynamic frictions between two contact materials to be measured can be measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the bottom surface of footwear and roads.
The present invention relates to a friction coefficient measuring device for footwear or the like that measures a friction coefficient between a member such as a floor or the surface of ice or snow.

[0002]

2. Description of the Related Art Heretofore, in this type, the following has been done. There was a device that could measure the friction coefficient of materials such as rubber and plastic.

[0003]

The problems described in the prior art have the following problems. 1. The bottom surface of footwear and members such as roads and floors, or ice
The friction coefficient with the snow surface could not be measured. 2. Furthermore, it was not possible for humans to actually wear footwear and measure the coefficient of friction. As a result of studies to solve the above problems, the present inventor has developed a device capable of measuring the coefficient of friction between the bottom surface of the footwear and the member of the road / floor or the surface of ice / snow.

[0004]

In order to achieve the above object, the present invention is as follows. That is,
The one of the present application is a test piece fixing jig for fixing footwear and a road /
It consists of a member such as the floor, or a test table for fixing ice and snow, and makes the bottom surface of the footwear contact the member such as the road and floor or the surface of the ice and snow to drive the bottom surface of the footwear horizontally. It is configured to measure the load at high temperature and calculate the coefficient of friction, so that it can be measured in a low temperature environment as necessary, and the coefficient of friction between the bottom surface of footwear and the ice surface below zero degrees Celsius can be measured. It is a friction coefficient measuring device for footwear and the like that is configured to be capable. In addition, it can be configured as follows. First. The flat bottom plate 1A and left and right plates 1B erected on the left and right sides of the bottom plate are connected in an upward U-shape on the front, and wheels 1C are attached to the four bottom corners of the bottom plate 1A. In the frame 1, the rotation shaft 2 is rotatably supported in the center of the upper side of the left and right plates 1B of the frame 1 in the left-right direction, and the top plate 4 formed in a flat rectangular shape corresponding to the upper opening of the frame 1 rotates. A handle 6A for operating the shaft 6 is attached to the tip of a shaft 6 which is connected to a shaft 2 for a vehicle through a top plate bracket 5 and is rotatably supported in a front-rear direction on a left plate 1B of the frame 1. A pinion gear 7 is fixed to the pinion gear. The pinion gear is configured to mesh with a worm gear 8 fixed near the left end of the rotating shaft. The left end of the shift 2, the inclination angle needle 9 to the longitudinal direction of the rotating shaft with a perpendicular direction
Is attached, and an operating portion B is provided at a rear portion of the top surface of the top plate 4, and a test table portion C is provided at a front portion thereof. The operating portion B is erected in front of and behind the top surface of the top plate 4. A gate form 10, a main rod 11 that is supported in the upper part of the gate form so as to be rotatable in the front-rear direction and movable back and forth, and a test connected to the tip of the main rod via a load sensor 12. The one-piece fixing jig 13, the feed screw 14 supported in the lower part of the gate formwork in a state parallel to the main rod in the front-rear direction so as to be rotatable and movable back and forth, and the main rod and the feed screw are connected. It is composed of a connecting rod 14A and a motor 16 with a continuously variable transmission which is connected to the rear end of the feed screw 14 via an electromagnetic clutch 15, and the motor includes a tachometer 1
6A is installed side by side, the upper end of the connecting rod 14A is configured to engage with and disengage from a counter switch 24 provided at the upper rear portion of the gate formwork 10, and the lower end of the connecting rod 14A projects from the top surface of the top plate 4. It is configured to engage with and disengage from the front micro switch 17 and the rear micro switch 18, and an electric heater 19 and a cooling device 20 are provided on the side of the gate form 10, and each component in the operating unit B is Surrounded by a heat insulation box 21 except for the load sensor 12 and the test piece fixing jig 13,
The test table portion C is supported on the front upper surface of the top plate 4 so that the support height is adjustable.
It is composed of A and members such as roads and floors fixed in the specimen container, or ice and snow 23B. Second. The test piece fixing jig 13 has a U-shaped frame 13A facing forward in the plane, and a set screw 13B which is advanced and retracted inward of the frame at the tip of the frame.

[0005]

The function of the present invention is as follows. In the friction coefficient measuring device of the present invention, members such as roads and floors, or ice and snow are attached to the test table 23, footwear is attached to the U-shaped test piece fixing jig 13, and both members are brought into contact with each other. Then, if necessary, apply vertical load to the footwear, and
Load sensor 1 for resistance force due to friction between two objects
Measured according to 2. The test piece fixing jig 13 is U-shaped so that the footwear can be fixed, and has the same shape as the outer shape of the footwear.

[0006]

EXAMPLES Examples will be described with reference to the drawings. A
Is a friction coefficient measuring device for footwear according to the present invention. Reference numeral 1 denotes a frame, which is configured by connecting a flat rectangular bottom plate 1A and left and right plates 1B standing on the left and right side edges of the bottom plate in a U-shape facing upward in the front, and at the four corners of the bottom surface of the bottom plate 1A, wheels 1
C is attached. Reference numeral 2 denotes a rotating shaft, which is rotatably supported by a bearing metal 3 at the center of the upper side of the left and right plates 1B of the frame 1 in the left-right direction. Reference numeral 4 denotes a top plate, which is formed in a square shape in plan view so as to correspond to the upper surface opening of the frame 1 and is connected to the rotating shaft 2 via a top plate bracket 5. As a result, this top plate swings up and down about the rotation shaft.

A shaft 6 is rotatably supported by the left plate 1B of the frame 1 in the front-rear direction, and a handle 6A for operating the shaft is provided at the tip of the shaft.
Is attached, and a pinion gear 7 is fixed to the rear end thereof. The pinion gear meshes with a worm gear 8 fixed near the left end of the rotating shaft. Reference numeral 9 denotes a tilt angle needle attached to the left end of the rotating shaft 2 in a direction orthogonal to the longitudinal direction of the rotating shaft. The top plate 4 can be tilted to a desired angle by operating the pinion gear 7 and the worm gear 8 by operating the handle 6A.
As a result, the entire device provided on the top plate 4 can be tilted at a desired angle.

An operating portion B is provided at a rear portion of the top surface of the top plate 4, and a test bench portion C is provided at a front portion thereof. The operating part B is a portal form 10 standing up and down on the upper surface of the top plate 4, a main rod 11 supported in the upper part of the portal form so as to be rotatable in the front-rear direction and movable back and forth.
A test piece fixing jig 13 connected to the tip of the main rod via a load sensor 12, and supported in the lower portion of the gate formwork in a state parallel to the main rod so as to be rotatable in the front-rear direction and movable back and forth. A feed screw 14, a connecting rod 14A connecting the main rod and the feed screw, and a continuously variable transmission motor 16 connected to the rear end of the feed screw 14 via an electromagnetic clutch 15, and A tachometer 16A is attached to this motor.

In this case, A. The test piece fixing jig 13 is for fixing footwear, and the shape thereof is similar to the outer shape of footwear. That is, in the test piece fixing jig 13, a U-shaped frame 13A facing forward in the plane and a set screw 13B moving forward and backward toward the inside of the frame are screwed into the tip of the frame. The heel of, for example, a rubber shoe 25 desired to be measured is put in the frame 13A, and the heel is fixed by tightening the set screw 13B. B. The electromagnetic clutch 1 by the motor 16 without a transmission
The test speed is controlled by rotating 5 and the feed screw 14 and adjusting the number of rotations. C. The main rod 11 moves horizontally by the rotation of the feed screw. D. The load measured by the load sensor 12, that is, the frictional force between two measured objects (between two members) is measured.

The upper end of the connecting rod 14A is configured to engage with and disengage from a counter switch 24 provided at the upper rear portion of the gate form 10, and the lower end of the connecting rod 14A is projected on the top surface of the top plate 4. It is configured to be engaged with and disengaged from the front micro switch 17 and the rear micro switch 18 which are operated. These micro switches 17 and 18 adjust the moving distance of the main rod 11, that is, the measurement length of the friction coefficient. Reference numeral 19 is an electric heater, and 20 is a cooling device. The electric heater 19 prevents a temperature drop inside the device in a low temperature environment and enables measurement even under zero degrees Celsius. Each of the above constituent parts is the load sensor 12
It is surrounded by a heat insulation box 21 except for the test piece fixing jig 13.

The test table portion C includes four test-body-container height adjusting screws 22 erected on the front upper surface of the top plate 4, and a test table horizontally supported by these test-body-container height adjusting screws. The test table 23 includes a test sample container 23A and members such as roads and floors fixed in the test sample container or ice / snow 23B.
With the test table 23, it is possible to measure the coefficient of friction between a member such as a road / floor or ice / snow and the bottom surface of the footwear fixed by the test piece fixing jig 13.
It is possible for humans to actually wear footwear and perform measurements. For the measurement of the friction coefficient, it is possible to measure the static friction coefficient when the two objects to be measured in contact start moving and the dynamic friction coefficient when the object moves. In the figure, 26 is a computer.

[0012]

Since the present invention is configured as described above, it has the following effects. 1. It is possible to measure the coefficient of friction between the bottom surface of footwear and the surface of a member such as a road or floor, or the surface of ice or snow. 2. The friction coefficient can be calculated by measuring the load when the two objects to be measured in 1 above are brought into contact with each other and driven horizontally. 3. It is possible to measure in a low temperature environment, and to measure the friction coefficient between ice and snow surfaces below zero degrees Celsius. 4. Since the entire device can be tilted by operating the handle 6A, in addition to the flat road surface condition, the uphill condition, the downhill condition, etc. can be displayed as necessary to measure the friction coefficient in various conditions. can do.

[Brief description of drawings]

FIG. 1 is a perspective view with a part cut away.

FIG. 2 is an enlarged perspective view of an essential part with a part of the same cut away.

FIG. 3 is an enlarged left side view of an essential part with a part broken to explain the operation.

[Explanation of symbols]

 A Friction coefficient measuring device for footwear 1 Frame 2 Rotation shaft 3 Bearing metal 4 Top plate 5 Top plate bracket 6 Shaft 7 Pinion gear 8 Worm gear 9 Inclination angle needle 10 Portal form 11 Main rod 12 Load sensor 13 Test piece fixing jig 14 Feed screw 15 Electromagnetic clutch 16 Motor with continuously variable transmission 17,18 Micro switch 19 Electric heater 20 Cooling device 21 Heat retaining box 22 Specimen container height adjusting screw 23 Test table 24 Counter switch 25 Rubber shoes 26 Computer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 592212906 Toyo Kako Co., Ltd. Inaho, Teine-ku, Sapporo-shi, Hokkaido 3-4, 141-position (72) Inventor Katsumi Fujishima 11-chome, Kita-ku, Kita-ku, Sapporo 1-11 (72) Inventor, Mitsunori Yoshida, 11-1, Kita-ku, Nishi, Kita-ku, Sapporo, Hokkaido 1-chome, Kita-ku, Hokkaido (72) Katsumi Konno, Katsumi Konno, 11-chome, Kita-ku, Kita-ku, Sapporo, Hokkaido (72) Inventor Yutaka Iioka, Toyo Kako Co., Ltd., 3-141, Inaho, Inaho, Teine-ku, Sapporo-shi, Hokkaido

Claims (3)

[Claims] 1. A test piece fixing jig for fixing footwear and a road /
It consists of a member such as the floor, or a test table for fixing ice and snow, and makes the bottom surface of the footwear contact the member such as the road and floor or the surface of the ice and snow to drive the bottom surface of the footwear horizontally. It is configured to measure the load at high temperature and calculate the coefficient of friction, so that it can be measured in a low temperature environment as necessary, and the coefficient of friction between the bottom surface of footwear and the ice surface below zero degrees Celsius can be measured. A friction coefficient measuring device for footwear or the like, which is configured so that it can be. 2. A flat bottom plate (1A) and left and right plates (1B) standing upright on the left and right sides of the bottom plate are connected to each other in an upward U-shaped front shape, and the bottom plate (1A) is In the frame (1) to which the wheels (1C) are attached at the four corners of the lower surface, the rotation shaft (2) is rotatably supported in the center of the upper side of the left and right plates (1B) of the frame (1) in the left-right direction. A top plate (4) having a flat rectangular shape corresponding to the upper opening of the frame (1) is attached to the rotation shaft (2) on the top plate bracket (5).
And the left plate (1) in the frame (1).
A handle (6A) for operating the shaft is attached to the tip of a shaft (6) rotatably supported in B) in the front-rear direction, and a pinion gear (7) is fixed to the rear end of the shaft (6). It is configured to mesh with a worm gear (8) fixed near the left end of the rotating shaft, and has an inclination angle needle (9) at the left end of the rotating shaft (2) having a direction orthogonal to the longitudinal direction of the rotating shaft. ) Is attached, and an operating part (B) is provided at a rear portion of the top surface of the top plate (4) and a test stand portion (C) is provided at a front portion thereof.
The operating part (B) is provided with a gate formwork (10) standing up and down on the upper surface of the top plate (4), and is rotatable in the front-rear direction in the upper part of the gate formwork and is reciprocated. A freely supported main rod (11) and a test piece fixing jig (1) connected to the tip of the main rod via a load sensor (12).
3), a feed screw (14) rotatably supported in the front-back direction in a state parallel to the main rod in the lower part of the gate formwork, and a connecting screw connecting the main rod and the feed screw. It is composed of a rod (14A) and a motor (16) with a continuously variable transmission connected to the rear end of the feed screw (14) via an electromagnetic clutch (15), and this motor has a tachometer (16A). ) Is installed side by side, and the upper end of the connecting rod (14A) is configured to engage with and disengage from a counter switch (24) provided at the upper rear portion of the gate formwork (10).
The lower end of A) is configured to engage with and disengage from the front microswitch (17) and the rear microswitch (18) that are provided on the top surface of the top plate (4), and are located on the side of the gate formwork (10). Is equipped with an electric heater (19) and a cooling device (20), and each component of the operating part (B) is a load sensor (12).
And the heat retaining box (2
The test table portion (C) is surrounded by 1) and the test table (23) is supported on the front upper surface of the top plate (4) with adjustable support height. A friction coefficient measuring device for footwear or the like, which is composed of members such as roads and floors fixed in a test body container, or ice and snow (23B). 3. The test piece fixing jig (13) has a U-shaped frame (13A) facing forward in a plane and a set screw (13B) screwing forward and backward toward the inside of the frame at the tip of the frame. The friction coefficient measuring device for footwear according to claim 2, which is incorporated.