JPH0618390A - Abrasion tester for floor - Google Patents

Abstract

PURPOSE:To accurately determine the durability of a floor face by providing a means for adjusting a distance between a test mount and a wheel attaching part to push a wheel against a sample surface on either of the test mount and the wheel attaching part and coupling the wheel and a crank transmission mechanism for linearly reciprocating. CONSTITUTION:A floor sample 2 having a predetermined size is mounted on a test mount 3, and a wheel 61 of a carrier is secured to a wheel attaching face 63 with bolt. Then, compressed air is supplied to an air cylinder 4 to push a cylinder rod 42. Since a leg 31 of the sample mount 3 is vertically movably supported by a linear bush 11a at this time, the sample mount 3 moves upward in a horizontal state. The sample 2 is pushed against a wheel 61a by further supplying compressed air, and a push load is monitored by a load cell. Then, when power is supplied to drive a motor 7, a wheel attaching part 6 is linearly reciprocated in right and left directions along a rail 5 via a coupling rod 10 together with a rotation of a crank wheel 9. The reciprocation is repeated to measure deterioration inside the sample to determine the abrasion and durability of the floor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor wear test.

[0002]

2. Description of the Related Art In recent years, the use of automatic carriers for materials and equipment has become common in various factories, clean rooms, etc., and the floor surface has become a dedicated floor specification. When materials and equipment are transported by an automated guided vehicle, if the floor surface is significantly worn, the floor surface is scratched, or the floor surface is peeled off, the automatically controlled guided vehicle will stop at the specified stop position. It becomes impossible to stop automatically, making automatic control impossible. Therefore, it is important to know the durability and usage limit of the floor surface for automated guided vehicles, and conventionally, in judging the durability of the floor surface, a taper-type abrasion tester for abrasion test of materials is used. ing. The abrasion test by the Taber abrasion tester is a abrasion test in which a sample is mounted on a horizontal disk that rotates at a constant speed and wear is caused between the sample and a pair of abrasion wheels to which a specified contact pressure is applied.

[0003]

Since the wearer wheels are used in the Taber type wear test, the wheel state of the carrier actually moves on the floor surface of a factory or the like to reproduce the wear state caused on the floor surface. Was difficult. Moreover, in the Taber-type wear test, the wear wheel and the sample make rolling contact while making relative movement at a constant speed, but the actual transport vehicle revolves or reciprocates on a predetermined orbit. The wheels of the carrier and the floor are in rolling contact with each other while making relative movements such as starting, accelerating, decelerating, and stopping. That is, the relative motion between the worn wheel and the sample as the test condition is completely different from the actual relative motion between the wheel of the transport vehicle and the floor surface.

Further, in the Taber type abrasion test, only a specified contact pressure can be applied to the sample due to the structure of the tester,
Moreover, the specified contact pressure is considerably smaller than the contact pressure (for example, 1000 kg) actually generated between the wheels of the carrier and the floor. That is, the magnitude of the surface pressure between the worn wheel and the sample, which is a test condition, is completely different from the magnitude of the surface pressure between the wheel of the transport vehicle and the floor surface.

In the Taber abrasion tester, a large shearing force is applied to the sample, which is also different from the actual case. Thus, in relative motion, surface pressure, shearing force, etc., the contact state between the sample and the wear wheel in the conventional Taber-type wear test is considerably different from the contact state between the wheel of the actual transport vehicle and the floor surface. Therefore, in the Taber-type wear test, it is more difficult to reproduce the wear state of the floor surface, and there is a problem that the usage limit of the floor surface, that is, the durability cannot be accurately grasped. It was When a floor surface whose durability is not accurately grasped is used in a factory, etc., damage such as peeling of the floor surface occurs,
As a result of this, the control accuracy of the stop position of the automatically controlled transport vehicle is reduced, and the equipment cannot be transported to a predetermined place.

Therefore, in view of the above problems, an object of the present invention is to provide a floor wear tester capable of accurately determining the durability of a floor surface.

[0007]

A floor wear tester according to claim 1 is a floor wear tester for carrying out a wear test of a floor on which a transport vehicle travels, and a frame and a floor surface sample of a predetermined size. The sample stand on which the vehicle is mounted, the wheel mount that can be removably mounted with the wheel of the transport vehicle facing the floor sample mounted on the sample stand, and the rotary motion from the drive source are linearly reciprocated. The sample table and the wheel part mounting part are mounted on the frame so that the distance between the sample table and the wheel part mounting part can be relatively adjusted and can be relatively translated. At least one of the sample table and the wheel section mounting section is connected to a load applying means for relatively adjusting the distance between them to press the wheel against the sample surface. At least one of both parts The wheel of the wheel portion along a sample surface at both are parallel relative moving state so as to linearly reciprocate, and is characterized in that it is coupled to the crank transmission mechanism.

[0008]

According to the floor wear tester having the above structure, the floor surface sample is placed on the sample table, the wheel portion of the carrier is mounted on the wheel portion mounting portion, and the sample table and the wheel portion mounting portion are mounted by the load applying means. Adjust the distance between and to press the wheel against the sample surface with the desired load. After that, at least one of both the sample stand and the wheel portion mounting portion is driven by the drive source via the crank transmission mechanism, and the wheel is relatively linearly reciprocated along the sample surface. In this way, the test can be performed by using the wheels actually used, and also by making the running state of the wheels and the contact pressure of the wheels on the sample surface close to the actual use conditions.

[0009]

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. FIG. 1 is a front view of a floor wear tester according to an embodiment of the present invention, showing a state in which a floor surface sample is installed and test preparation is completed. Hereinafter, the left and right in the figure are referred to as left and right.

Referring to FIG. 1, this tester has a frame 1 consisting of a lower frame 11 and an upper frame 12, a horizontal sample table 3 on which a floor sample 2 is placed, and a sample table 3 fixed to the lower frame. Air cylinder 4 as a load applying means that can be pushed up by the load of
2 is horizontally movably mounted on a horizontal rail 5 fixed to a cross member 12a at the upper left portion of the vehicle 2, and is a wheel portion 6 of a carrier vehicle.
Wheel part attachment part 6 to which 1 can be detachably attached
And a motor 7 as a drive source mounted on the right side of the upper surface of the lower frame 11, and a crank transmission mechanism A interposed between the motor 7 and the wheel portion mounting portion 6.

Lower frame 11 and upper frame 12
Is a frame structure in which angle members are combined. The sample table 3 has a plurality of legs 31 fixed to the lower surface thereof. Each leg 31 is slidably supported in the vertical direction by a linear bush 11a fixed to the left side of the upper surface of the lower frame.

The air cylinder 4 pushes up the sample table 3 by the cylinder rod 42 via the load cell 41, and adjusts it to a desired load while monitoring the load. The wheel portion mounting portion 6 engages with the rail 5 and slides along the rail 5, a mounting surface 63 for mounting the wheel portion 61 by a bolt or the like (not shown), and a crank transmission mechanism A.
Has a connecting portion 64 that connects with a connecting rod 10 described later.
The mounting surface 63 is provided with a plurality of bolt holes so as to be compatible with bolt mounting pitches of various wheel portions 61.

The crank transmission mechanism A includes a crank wheel 9 that rotates in unison with the motor 7 through a pulley 71 that rotates integrally with the rotating shaft of the motor 7, an endless belt 8 and a pulley 91, and one end 10a of the crank wheel 9.
The connecting rod 10 is connected to the connecting portion 92 on the crank wheel 9 side and is separated from the center by a predetermined distance, and the other end 10b is connected to the connecting portion 64 of the wheel portion mounting portion 6.

Next, the usage and operation of this device will be described. The floor surface sample 2 of a predetermined size is placed on the sample table 3, and the wheel portion 61 of the transport vehicle actually used is mounted on the wheel portion mounting surface 63 of the wheel portion mounting portion 6 with bolts. Next, compressed air is supplied to the air cylinder 4 to extend the cylinder rod 42. At this time, the legs 31 of the sample table 3
Is supported by the linear bush 11a so as to be movable up and down, so that the sample table moves upward while keeping horizontal.
The floor surface sample 2 in contact with the wheel 61a of the wheel portion 61 is pressed against the wheel by further supplying compressed air to the air cylinder 4. This pressing load is detected and monitored by the load cell, and when the desired pressing load is reached, the supply of compressed air is stopped. Thereby, the load applied to the floor surface sample 2 as the test condition is set.

Next, when power is supplied to drive the motor 7,
The rotation of the motor 7 is transmitted to the crank wheel 9 via the pulley 71, the endless belt 8 and the pulley 91. With the rotation of the crank wheel 9, the wheel mounting portion 6 is linearly reciprocated in the left-right direction along the rail 5 via the connecting rod 10. The reciprocating motion of the wheel mounting portion 6 is so-called simple vibration. Therefore, the wheel 61a of the wheel portion 61, which is mounted on the wheel mounting portion 6 and is in contact with the floor sample 2 with a desired load, starts, accelerates, Repeat the relative motion of deceleration and stop. By repeating this reciprocating motion a specified number of times and measuring the amount of wear, including fatigue due to internal deterioration of the sample, cracks, scratches, gloss and dirt, it is possible to know the wearability of the floor surface used as the sample. At the same time, the durability of the floor can be considered.

According to the above-described embodiment, the wheel of an actually used carrier vehicle is used, and the test can be performed by setting the load condition and the relative motion condition when the wheel actually travels on the floor surface. The durability of the floor surface can be accurately determined from the measurement results according to this example. The present invention is not limited to the above-mentioned embodiment, and instead of the linear cylinder such as the air cylinder as the load applying means, a rotary type motor,
A link mechanism that converts the rotational movement of this motor into a linear movement may be used.

Further, if the sample table 3 is fixed to the lower frame 11 and the wheel portion mounting portion 6 is vertically movable and the air cylinder 4 and the like are connected thereto, the load can be applied from the wheel side to the sample side. You can In this case, the wheel mounting portion 6
Also, both the sample table 3 and the sample table 3 can be moved up and down. Further, if the sample table 3 is horizontally movable and the crank transmission mechanism A is connected to the structure, the floor sample 2 can be reciprocated with respect to the fixed wheel. In this case, relative movement may be obtained by moving both the wheel mounting portion 6 and the sample table 3 left and right.

Further, the connecting portion 10 on the crank wheel 9 side
If the distance of a from the center of the crank wheel is variable, the stroke of the reciprocating motion of the wheel can be changed. In addition, various design changes can be made without changing the gist of the present invention.

[0019]

According to the present invention, it is possible to use a wheel that is actually used and perform a test in a form close to that when the wheel actually travels on the floor surface. It is possible to accurately judge the durability.

[Brief description of drawings]

FIG. 1 is a front view of a floor wear tester according to an embodiment of the present invention.

[Explanation of symbols]

 1 Frame 2 Floor Sample 3 Sample Stand 4 Air Cylinder (Load Loading Means) 6 Wheel Attachment Part 61 Wheel Part 61a Wheel 7 Motor (Drive Source) 9 Crank Wheel 10 Connecting Rod A Crank Transmission Mechanism

Claims (1)

[Claims] 1. A floor wear tester for carrying out a wear test of a floor on which a carrier travels. A frame, a sample stand for mounting a floor surface sample of a predetermined size, and a wheel part of the carrier are mounted on the sample stand. It is equipped with a wheel mounting part that can be removably mounted in a state of facing the fixed floor sample, and a crank transmission mechanism that converts the rotary motion from the drive source into a linear reciprocating motion and transmits it. The wheel mounting portion and the wheel mounting portion are attached to the frame such that the distance between them can be relatively adjusted and can be moved in parallel with each other. One of them is connected to a load applying means that relatively adjusts the distance between them and presses the wheel against the sample surface. Wheels A wear tester for floors, which is connected to the crank transmission mechanism so as to linearly reciprocate the wheels of the part along the sample surface.