Light-weight collision tester, and light-weight collision testing method

Abstract

To reproduce and evaluate scratches that are difficult to be reproduced and generated by contact of accessories in particular among objects used daily and nails, which are light and hard.SOLUTION: A light-weight collision tester 1 is a tester for evaluating the scratch resistance performance of a surface of a building material, and the tester comprises a motor 2, a rotating body 4 fixed to a rotation shaft 2A of the motor 2, an impact body 10, and a connecting body 11 connecting the impact body 10 to the rotating body 4 in a swingable state. The impact body 10 driven to be rotated by the motor 2 can collide with a surface of a building material to be evaluated.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention is a technique for evaluating the scratch resistance of the surface of building materials such as decorative sheets and decorative boards. [Background technology]

[0002] Tests for measuring the surface durability and hardness of building materials include abrasion tests, scratch hardness (see Patent Document 1), and impact resistance for JAS plywood, while JIS includes impact resistance tests, abrasion tests, and pencil scratch tests.

[0003] For example, among the tests used in the building materials industry to evaluate the surface properties and hardness of decorative sheets, standardized evaluation methods for surface scratches include the diamond scratch test and the pencil scratch test. The diamond scratch test is a test in which a lightweight, hard object is dragged across the surface of a building material to make a relative comparison of the degree of scratches. The pencil scratch test is a test in which a heavy object is dragged across the surface of a building material to make a relative comparison of the degree of scratches.

[0004] However, because these standards are designed to accommodate a variety of surface materials, there are few that can reveal subtle differences in performance when a decorative sheet is used on the surface. Furthermore, in the past, decorative sheet manufacturers have independently designed and conducted tests that reveal differences in performance and practical effects of decorative sheets.

[0005] Furthermore, in the case of decorative panels for building materials in which a decorative sheet is attached to the surface of the decorative panel, this alone does not show any difference in scratch resistance, and is therefore insufficient for evaluation.

[0006] In response to this, the building materials industry has devised and added various tests, such as the Hoffman scratch test, steel wool sliding test, coin scratch test, and caster test, to compare surface performance and evaluate whether a material can withstand practical use.The addition of these tests has made it possible to conduct test evaluations and develop decorative sheets that take into account the effects of scratches from hard, sharp, or blunt objects, scratches from light, hard objects, and scratches that are caused by gradual everyday wear. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 5-187983 Summary of the Invention [Problem to be solved by the invention]

[0008] However, conventional tests, such as caster tests, are conducted under practical conditions, and scratches are rarely evaluated in their original state. Furthermore, in the case of caster testing, although there are many different types of casters, they all come into contact (scrape) with the decorative panel in the same way, making it easy to standardize the test conditions. However, there are so many different types of scratches that can occur on decorative paneling and floors in everyday life that it is difficult to standardize the tests under the same conditions using conventional testing machines.

[0009] The present invention was made with the above points in mind, and one of its objectives is to make it possible to reproduce and evaluate scratches caused by light and hard accessories or fingernails, which are difficult to reproduce among everyday items. [Means for solving the problem]

[0010] In order to solve the problem, one aspect of the present invention is a testing machine for evaluating the scratch resistance of building material surfaces, which is a lightweight collision testing machine comprising a motor, a rotating body fixed to the rotating shaft of the motor, an impact body, and a connecting body that connects the impact body to the rotating body in a swingable state, and wherein the impact body, rotated by the motor, is capable of colliding with the surface of the building material to be evaluated. [Effects of the Invention]

[0011] According to this aspect of the present invention, it is possible to repeatedly collide an impact body simulating an accessory, a nail, etc. with a stable impact against the same area on the surface of a building material. As a result, according to this aspect of the present invention, it is possible to reproduce and evaluate surface scratches caused by an accessory, a nail, etc., which are difficult to reproduce in everyday items.

[0012] Furthermore, by replacing the impact body, the material to be scratched can be easily changed, and the manner and degree of the scratches can be evaluated in a short time. Furthermore, by attaching multiple impact bodies to the rotating body, it is possible to apply multiple types of impacts at once. Moreover, the impact force can be easily adjusted by simply changing the rotation speed of the motor. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a side view showing a lightweight collision test machine according to an embodiment of the present invention. [Figure 2] 1A and 1B are diagrams showing a rotating body, in which (a) is a side view and (b) is a front view. [Figure 3] FIG. 10 is a diagram showing an example of an impact body made of an accessory. [Figure 4] FIG. 10 is a diagram showing an example of an impact body made of an accessory. DETAILED DESCRIPTION OF THE INVENTION

[0014] Next, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the building material to be evaluated is assumed to be a decorative board with a decorative sheet provided on the surface of the board. The building material may be, for example, a board with a coating film provided on the surface. Note that the surface of the decorative sheet or coating film is the surface to be evaluated.

[0015] (composition) As shown in FIG. 1, the lightweight collision test machine 1 of this embodiment includes a motor 2, a rotating body 4, an impact body 10, and a connecting body 11. 1, the decorative board is designated by the reference numeral 20. The decorative board 20 has a decorative sheet provided on its upper surface.

[0016] <Motor 2>. The motor 2 is a rotary drive device such as an electric motor, and is provided with a rotating shaft 2A. The motor 2 is preferably a motor whose rotation speed is variable. Reference numeral 3 denotes a controller that controls the drive of the motor 2. By operating the controller 3, the rotation drive and rotation speed of the motor 2 can be changed.

[0017] <Rotating body 4> The rotating body 4 is fixed to the rotating shaft 2A. As shown in FIG. 2, the rotating body 4 of this embodiment is made up of a rotating body main body 5 and a cylindrical body 6. The cylindrical body 6 has an insertion hole 4a into which the rotating shaft 2A can be fitted. The insertion hole 4a is formed along the axis of the cylindrical body 6.

[0018] As shown in FIG. 1 , the cylindrical body 6 is configured to be fixed to the rotating shaft 2A with a bolt (not shown) or the like when the rotating shaft 2A is inserted into the insertion hole 4a of the cylindrical body 6. For example, the rotating shaft 2A is fastened to the cylindrical body 6 with a bolt (not shown) through the opening 5b of the rotor main body 5. In this case, the opening 5b has a smaller diameter than the insertion hole 4a. The tip of the rotating shaft 2A has a female screw hole. Alternatively, the tip of a bolt that screws into the cylindrical body 6 in a direction perpendicular to the axis may be abutted against the rotating shaft 2A to fix the rotating shaft 2A. The insertion hole 4a has a cross-sectional shape that can engage with the rotating shaft 2A. Note that if the portion of the rotating shaft 2A inserted into the insertion hole 4a is polygonal, for example, it is possible to prevent the cylindrical body 6 from displacing circumferentially relative to the rotating shaft 2A. In this case, the cross-section of the insertion hole 4a also has the same polygonal shape.

[0019] The rotor main body 5 is made of a plate member with a surface facing in a direction perpendicular to the axis of the rotation shaft 2A. In this embodiment, a disk is exemplified as the rotor 4. However, the shape of the rotor 4 is not particularly limited. A plurality of impact body mounting portions 5a are arranged in the circumferential direction on the outer periphery of the rotating body 4. In this example, through holes opening in the rotating body 4 are exemplified as the impact body mounting portions 5a. In this embodiment, the rotor 4 is made of a metal material such as steel in consideration of rigidity.

[0020] <Impactor 10> An impact body 10 is attached to the impact body attachment portion 5a of the rotating body 4 in a swingable state. The impactor 10 is preferably made of a lightweight and hard material. Lightweight means, for example, 500 g or less, and should be an object that can be easily held in one hand. Metal materials are preferred as the material, but resin materials are also acceptable. However, it is preferable that the material has a certain level of rigidity.

[0021] Figures 3 and 4 show an example of the impact body 10. Figures 3 and 4 show an example in which the impact body 10 is configured as an accessory that can be attached to a person's ear, bag, or the like. The impactor 10 has a main body 10A that impacts the surface of the building material and an attachment part 10B for attaching to the rotating body 4. In this example, the attachment part 10B is made of a member with an endless opening. The impactor 10 in Figure 4 is an example of an accessory in which the main body 10A and the attachment part 10B are connected by a ball chain 10C.

[0022] Here, a lightweight metal object such as a coin, an accessory, an artificial nail, a pencil, or an object that resembles any of these is preferable as the impactor 10. Lightweight refers to, for example, 500 g or less. In addition, although the present example illustrates a case in which the main body 10A and the attachment portion 10B are integrated, the attachment portion and the main body 10A may be configured to be detachable. For example, the attachment portion 10B may have a clip portion, and the main body 10A may be detachably fixed to the clip portion. In this case, an accessory or the like can be used as the main body 10A.

[0023] <Concatenation 11> The connecting body 11 is a member that connects the impact body 10 to the rotating body 4 in a swingable state. The connecting body 11 of this embodiment is composed of a split ring. As shown in Fig. 1, the split ring detachably connects the through hole that constitutes the impact body mounting portion 5a of the rotating body 4 and the opening of the mounting portion 10B of the impact body 10. As a result, the impact body 10 is connected to the rotating body 4 in a swingable state. 1, the impact body 10 is attached to only one impact body attachment portion 5a, but the impact body 10 may be attached to each of two or more impact body attachment portions 5a.

[0024] The connector 11 is not limited to a ring material such as a split ring, but may be a string-like material such as a cord or chain. The connector 11 may also be a spring. However, when the mounting position of the impact body 10 on the rotating body 4 is at the 5 o'clock to 7 o'clock position (near the bottom) of the clock, it is preferable that the impact body 10 mounted on the rotating body 4 is configured so that at least a portion of the impact body 10 is positioned below the bottom of the body of the motor 2, as shown in Figure 1.

[0025] (Lightweight crash test method) 1, the motor 2 is placed on the decorative board 20 with the surface of the decorative board 20 positioned below the rotating body 4. In this way, the weight of the motor 2 fixes the decorative board 20 in place.

[0026] In this state, the motor 2 is driven to rotate, whereby the impact body 10 can be made to repeatedly collide with the same area on the surface of the decorative board 20 with the same impact. At this time, for example, the rotational speed of the motor 2 may be kept constant, and the degree of damage to the surface of the decorative board 20 may be evaluated after the motor 2 has been driven for a predetermined period of time.

[0027] Furthermore, by changing the rotation speed, the centrifugal force applied to the impact body 10 is changed, and the amount of impact can be easily adjusted. In other words, the test time can be shortened and the degree of impact can be changed. Furthermore, since the impact body 10, that is, the thing that causes the damage, can be changed, it is possible to evaluate objects that can cause various damages.

[0028] It is also possible to attach multiple impact bodies 10 to the rotating body 4. When attaching multiple impact bodies 10 to the rotating body 4, attaching different types of impact bodies 10 makes it possible to simultaneously inflict various scratches. Also, attaching multiple identical impact bodies 10 can shorten the test time.

[0029] Here, by attaching the impact body 10 to the rotating body 4 in a swingable state, the impact force from the impact body 10 does not become excessive, and furthermore, it becomes possible to reproduce and evaluate scratches caused by hitting with light yet hard metals, nails, accessories, etc. In other words, it is possible to easily reproduce collisions with objects used in daily life.

[0030] As described above, according to the present invention, it is possible to reproduce and confirm the manner in which scratches are made on the surface of decorative panel 20 by hard, small, lightweight objects such as accessories, and changes in the gloss of the surface of decorative panel 20, in a manner that is close to reality.

[0031] 1, the surface of the rotor main body 5 is perpendicular to the surface of the decorative board 20, but it may be at a different inclination angle. That is, the impactor 10 may be caused to collide with the surface of the decorative board 20 with the surface of the rotor main body 5 inclined relative to the surface of the decorative board 20. Furthermore, this embodiment also makes it possible to carry out a test to reproduce scratches around the door handle.

[0032] (others) The present disclosure may also have the following configuration. (1) Disclosure 1 is a tester for evaluating the scratch resistance of the surface of a building material, a motor, a rotating body fixed to a rotation shaft of the motor, an impact body, and a connecting body that connects the impact body to the rotating body in a swingable state, The impact body, which rotates by a motor, is capable of colliding with the surface of the building material to be evaluated. Lightweight crash test machine. (2) Disclosure 2 states that the building material is a decorative sheet or a decorative board. (3) In disclosure 3, the rotating body has a plurality of openings along the circumferential direction for attaching the impact body. (4) In disclosure 4, the impact body is detachably attached to the rotating body. (5) Disclosure 5 provides that the impact body is selected from accessories, artificial nails, coins, pencils, or objects resembling these. (6) Disclosure 6 is a test method for evaluating the scratch resistance of a building material surface, In the lightweight crash test machine disclosed herein, The impact body is repeatedly collided with the surface of the building material, and the formation of scratches on the surface of the building material is evaluated. Lightweight crash test method. [Explanation of symbols]

[0033] 1 Lightweight crash test machine 2 motors 2A Rotating shaft 3 Controller 4 Rotating bodies 4a Insertion hole 5 Rotating body 5a Impact body mounting part 6 cylinder 10 Impactor 10A main body 10B Mounting part 11 Concatenation 20 Decorative panels

Claims

1. A testing machine for evaluating the scratch resistance of the surface of a building material, a motor, a rotating body fixed to a rotation shaft of the motor, an impact body, and a connecting body that connects the impact body to the rotating body in a swingable state, The impact body, which rotates by a motor, is capable of colliding with the surface of the building material to be evaluated. Lightweight crash test machine.

2. The building material is a decorative sheet or decorative board.

2. A lightweight collision test machine according to claim 1.

3. The rotating body has a plurality of openings along the circumferential direction for attaching impact bodies.

2. A lightweight collision test machine according to claim 1.

4. The impact body is detachably attached to the rotating body.

2. A lightweight collision test machine according to claim 1.

5. The impact body is selected from accessories, artificial nails, coins, pencils, or objects resembling these.

2. A lightweight collision test machine according to claim 1.

6. A test method for evaluating the scratch resistance of a building material surface, comprising: A lightweight collision test machine according to any one of claims 1 to 5, The impact body is repeatedly collided with the surface of the building material, and the formation of scratches on the surface of the building material is evaluated. Lightweight crash test method.

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