A rubbing table structure of a color fastness rubbing instrument

Abstract

This utility model relates to a color fastness rubbing tester, and discloses a rubbing table structure for the tester, including: a base, a platform, two mounting parts, two pressure rollers, a drive unit, and two swing arms. Initially, both mounting parts are positioned towards the inner side, resulting in a larger distance between the roller surfaces and the platform. Next, the sample is placed on the platform. Then, the drive unit moves the two pressure rollers away from each other, causing them to swing and reducing the distance between the roller surfaces and the platform, thus pressing the sample. Finally, because the roller surfaces have already pressed the sample, the pressure rollers cannot continue to swing relative to the mounting parts in that direction. The spring also serves another purpose: by overcoming the spring's effect on the movable arm, the movable arm can extend, allowing the two pressure rollers to move further away from each other without swinging, thus maintaining the pressure on the sample while still pressing it. In other words, the two pressure rollers, while maintaining pressure on the sample, move further away from each other, thereby taut and flattening the sample on the platform.

Description

Technical Field

[0001] This utility model relates to a color fastness rubbing tester, and particularly to a rubbing table structure for a color fastness rubbing tester. Background Technology

[0002] A color fastness rubbing tester is a testing instrument used to detect color changes in fabrics after they have been rubbed. A color fastness rubbing tester generally includes: a base, a rubbing table structure, a rubbing head structure, and a drive structure that moves the rubbing head back and forth.

[0003] The friction table structure is set on the base for placing and fixing the sample. After the sample is fixed, friction test paper is installed on the friction head (dry test paper is used for dry friction test, and wet test paper with the appropriate humidity is used for wet friction test). The support is removed, so that the friction head is in contact with the sample surface. The number of cycles is set, and the drive structure moves the friction head back and forth to rub the sample surface.

[0004] The friction stage can generally be adjusted in a horizontal direction perpendicular to its movement. By adjusting the position of the friction stage, the area in contact with the sample by the friction head can be adjusted. In particular, after completing the dry friction test, adjusting the stage position allows for changing the area on the same sample to perform a wet friction test.

[0005] The sample is typically fixed using two eccentric pressure rollers. When placing the sample, the distance between the roller surface and the friction table is relatively large. After the sample is placed, the pressure rollers are swung in the corresponding direction, reducing the distance between the roller surface and the friction table, thus tightening the sample. Since the sample needs to be taut and flattened after tightening, it is generally done manually by first pressing one side of the sample with the pressure roller, then pulling the other side of the sample with one hand to keep it taut and flat, while the other hand presses the sample with the pressure roller on the other side. This method of fixing the sample on the friction table is cumbersome and inconvenient, and the effect of tautness and flattening is generally poor, making adjustment difficult. Utility Model Content

[0006] This application provides a friction stage structure for a color fastness rubbing tester, which can solve the problems mentioned in the background art.

[0007] This application provides a friction stage structure for a color fastness rubbing tester, comprising: The base is for mounting on the base of a color fastness rubbing tester; A platform, mounted on the base, whose position can be adjusted along a first horizontal direction; Two mounting parts are slidably connected to the platform along a second direction that is perpendicular to the first direction and horizontal; Two eccentric pressure rollers are rotatably connected to two mounting parts about an axis in the first direction; The drive unit, mounted on the platform, acts on the two mounting parts to drive the two pressure rollers to slide in opposite directions. Two swing arms are respectively set on two pressure rollers; the swing arms include: a fixed arm body fixedly connected to one end of the pressure roller, a movable arm body that extends and retracts from the fixed arm body, and a spring; a slotted pin pair is also provided between the movable arm body and the platform; Among them, the groove pin pair is used to drive the pressure roller to swing relative to the mounting part by sliding the mounting part relative to the platform; the spring is used to keep the movable arm in the retracted position, and after the roller surfaces of the two pressure rollers press the sample, the two pressure rollers can move away from each other again without swinging by extending the swing arm.

[0008] In some embodiments, the stage is fixedly connected to two vertical plates; the two vertical plates are provided with guide grooves in the slotted pin pair; both vertical plates can also be adjusted in a fixed position on the stage along a second direction.

[0009] In some embodiments, a connecting key is provided between the fixed arm and the end of the pressure roller.

[0010] In some embodiments, the drive unit is a lead screw module employing a bidirectional lead screw.

[0011] In some embodiments, the platform includes: a concave block for connection with the base, and a material carrier plate detachably connected to the concave block; the screw module is installed on the bottom surface of the material carrier plate at the platform mounting position.

[0012] In some embodiments, the stage and the base are connected by a damped sliding connection.

[0013] In summary, this application discloses a friction table structure for a color fastness rubbing tester, comprising: a base, a platform, two mounting parts, two pressure rollers, a drive unit, and two swing arms. Initially, both mounting parts are positioned towards the inner side, resulting in a larger distance between the roller surfaces and the platform. Next, the sample is placed on the platform. Then, the drive unit moves the two pressure rollers away from each other, causing them to swing and reducing the distance between the roller surfaces and the platform, thus pressing the sample. Finally, because the roller surfaces have already pressed the sample, the pressure rollers cannot continue to swing relative to the mounting parts in that direction. The spring also serves another purpose: by overcoming the spring's effect on the movable arm, the movable arm can extend, allowing the two pressure rollers to move further away from each other without swinging, thus extending the swing arms. In other words, while maintaining pressure on the sample, the two pressure rollers move further away from each other, thereby taut and flattening the sample on the platform. The beneficial effect is that it simplifies the operation of fixing the sample on the friction table. Attached Figure Description

[0014] To better illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0015] Figure 1 This is a top view of this application; Figure 2 for Figure 1 Sectional view along the middle AA; Figure 3 This is a front view of this application; Figure 4 This is a schematic diagram of the present application; Figure 5 for Figure 4 An enlarged schematic diagram of part A in the middle; Figure 6 This is a schematic diagram of a swing arm; Figure 7 This is a schematic diagram showing the position of the pressure roller when the sample is placed on the platform. Figure 8 This is a schematic diagram showing the position of the pressure roller when it is being pressed during the test; Figure 9 This is a schematic diagram showing the position of the pressure roller when the object is stretched and laid out for testing.

[0016] In the picture, 1. Base; 2. Platform; 21. Concave block; 22. Material carrier plate; 2a. Vertical plate; 2a1. Guide groove; 2a2. Waist-shaped groove; 2b. Second screw; 3. Installation Department; 4. Pressure roller; 5. Drive unit; 6. Swing arm; 61. Fixed arm body; 61a. Groove; 62. Movable arm body; 62a. Guide post; 63. Spring; 6a. First screw; 6b. Connecting key; 6c. Pin; 6d. Stop. Detailed Implementation

[0017] The following description is provided in conjunction with the accompanying drawings, which are for illustrative purposes only and not strictly to scale. Unless otherwise defined, the technical or scientific terms used in this disclosure should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes. Unless otherwise specified, the embodiments in this application can be combined with each other.

[0018] Please see Figure 1 , Figure 3 and Figure 4 A friction table structure for a color fastness tester includes: a base 1, a platform 2, two mounting parts 3, two pressure rollers 4, a drive part 5, and two swing arms 6.

[0019] The base 1 is used to mount the rubbing tester on the base of the color fastness tester, that is, the rubbing table structure is mounted on the base of the color fastness tester via the base 1.

[0020] The stage 2 is mounted on the base 1 and its position can be adjusted along the first horizontal direction. The stage 2 is for placing the sample. By adjusting the position of the stage 2 along the first direction, the area in which the friction head of the color fastness rubbery tester contacts the sample can be adjusted. In particular, after completing the dry friction test, adjusting the position of the stage 2 along the first direction allows for changing the area on the same sample to perform a wet friction test.

[0021] Please see Figure 4 In some embodiments, the platform 2 and the base 1 are connected by a damped sliding connection.

[0022] The friction head slides back and forth along a second direction, which is perpendicular to the first direction and horizontal. Therefore, even without a fixing measure to restrict relative sliding between the platform 2 and the base 1, the platform 2 is not easily displaced relative to the base 1 during the back and forth sliding of the friction head due to damping, which also makes it easier to adjust the position of the platform 2.

[0023] Please see Figure 3 and Figure 4 The two mounting parts 3 are slidably connected to the stage 2 along the second vertical direction. The top surface of the stage 2 needs to be reserved for placing the sample. More specifically, the stage 2 is T-shaped, with both sides of the horizontal part extending beyond the vertical part. The bottom surfaces of these two extended parts are respectively provided for the two mounting parts 3 to slide and connect.

[0024] Two pressure rollers 4 are rotatably connected to two mounting parts 3 around a first axis in a first direction. More specifically, in conjunction with the above-mentioned "platform 2 is T-shaped", the mounting part 3 can be concave, with the two sides of the concave extending upward beyond the platform 2. These two extended parts are respectively used to rotatably connect the two ends of a pressure roller 4.

[0025] Both pressure rollers 4 are eccentric, meaning the second axis corresponding to the roller surface is offset from the first axis. The pressure rollers 4 adjust the distance between the roller surface and the platform 2 by oscillating around the first axis. When placing the sample, the distance between the roller surface and the platform 2 is relatively large. After the sample is placed, the pressure rollers 4 are oscillated in the corresponding direction, reducing the distance between the roller surface and the platform 2 and pressing the sample tightly.

[0026] The drive unit 5 is installed on the platform 2 and acts on the two mounting parts 3, causing the two mounting parts 3 to slide in opposite directions, that is, causing the two pressure rollers 4 to slide in opposite directions.

[0027] Please see Figure 1 and Figure 2 In some embodiments, the drive unit 5 is a lead screw module of a bidirectional lead screw. More specifically, the axis of the bidirectional lead screw is in the second direction, and the bidirectional lead screw is mounted on the platform 2 through two bearing seats. The two matching lead screw nuts are respectively fixedly connected to the two mounting parts 3, and the bidirectional lead screw is rotated manually.

[0028] Rotating the bidirectional lead screw causes the two mounting parts 3 to slide in opposite directions. The fit between the lead screw thread and the lead screw nut allows the two mounting parts 3 to balance speed and accuracy during movement.

[0029] Please see Figure 2 and Figure 3 In some embodiments, based on the above-described embodiment of "the drive unit 5 being a bidirectional lead screw module," the stage 2 includes: a concave block 21 and a material carrier plate 22. The concave block 21 is used to connect to the base 1. The material carrier plate 22 is detachably connected to the concave block 21, meaning the sample is placed on the material carrier plate 22. The lead screw module is installed on the bottom surface of the material carrier plate 22 on the stage 2, meaning the lead screw module passes through the recess in the concave block 21.

[0030] The lead screw and nut can be fixedly connected in the middle of the mounting part 3, making the mounting part 3 move more smoothly and stably.

[0031] Please see Figure 5 and Figure 6 Two swing arms 6 are respectively mounted on two pressure rollers 4. Each swing arm 6 includes a fixed arm body 61, a movable arm body 62, and a spring 63.

[0032] The fixed arm 61 is fixedly connected to one end of the pressure roller 4. More specifically, the fixed arm 61 has a through hole for the end of the pressure roller 4 to be inserted and a threaded hole communicating with the through hole. After the fixed arm 61 is fitted into the end of the pressure roller 4, the first screw 6a is screwed into the threaded hole to press against the end of the pressure roller 4, thereby fixing the fixed arm 61 and the end of the pressure roller 4 together.

[0033] The movable arm 62 extends and retracts from the fixed arm 61, meaning the length of the swing arm 6 is adjustable. A slotted pin pair is also provided between the movable arm 62 and the platform 2; the guide groove 2a1 of the slotted pin pair is located on the platform 2, and the pin 6c is located on the movable arm. A bearing can be used as the pin 6c, with its inner ring engaged with the movable arm and its outer ring maintaining contact with the two opposing inner walls of the guide groove 2a1.

[0034] Spring 63 is positioned between the fixed arm 61 and the movable arm 62 to keep the movable arm 62 in the retracted position, i.e., under normal conditions, spring 63 keeps the length of the swing arm 6 at its shortest. More specifically, the fixed arm 61 has a groove 61a to accommodate spring 63; the movable arm 62 is fixed with two guide posts 62a, which pass into the groove 61a, and the ends of the guide posts 62a are also equipped with studs, and the stop block 6d is fixedly connected to the two guide posts 62a by two nuts; the spring 63 is a compression spring 63, and there are two of them, which are respectively sleeved on the two guide posts 62a; one end of the spring 63 is kept against the inner wall of the groove 61a, and the other end is kept against the stop block 6d. Under the action of spring 63, the movable arm 62 is in contact with the fixed arm 61.

[0035] When the mounting part 3 slides relative to the platform 2, the pressure roller 4 swings relative to the mounting part 3 through the groove pin pair. When the two mounting parts 3 move away from each other when the sample is pressed, the swing direction of the pressure roller 4 is to reduce the distance between the roller surface and the platform 2; when the two mounting parts 3 move closer to each other, the swing direction of the pressure roller 4 is to increase the distance between the roller surface and the platform 2.

[0036] Initially, both mounting parts 3 are located on the inner side, and correspondingly, the distance between the roller surface and the platform 2 is relatively large.

[0037] Next, please refer to Figure 7 Place the sample on stage 2. You can place sandpaper under the sample and then place both on stage 2 together.

[0038] Then, please see Figure 7 and Figure 8 The two pressure rollers 4 are driven away from each other by the drive unit 5. The pressure rollers 4 swing, the distance between the roller surface and the platform 2 decreases, and the sample is pressed. Finally, please see Figure 8 and Figure 9 Because the roller surface has already pressed the sample, the pressure roller 4 cannot continue to swing relative to the mounting part 3 in this direction. If the length of the swing arm 6 is fixed, this would prevent the two pressure rollers 4 from moving further apart. However, the swing arm 6 is designed with a variable length, and the spring 63 also has another function: by overcoming the effect of the spring 63 on the movable arm 62, the movable arm 62 can be extended, thereby lengthening the swing arm 6 so that the two pressure rollers 4 can move further apart without swinging. In other words, while the two pressure rollers 4 are still pressing the sample, they move further apart by a certain distance, thus straightening and flattening the sample on the platform 2.

[0039] In addition, due to factors such as assembly errors, tolerances of individual parts, and offsets between parts during use, the two pressure rollers 4 may not be able to press the sample synchronously after the friction table structure is assembled and during subsequent use. Ideally, the two pressure rollers 4 should be able to press the sample synchronously.

[0040] In some embodiments, the configuration may be combined with the above-described "fixed arm body 61 having a through hole for insertion of the end of the pressure roller 4 and a threaded hole communicating with the through hole".

[0041] When one pressure roller 4 is pressing the sample while the other pressure roller 4 is not pressing the sample, the following operation can be performed: loosen the corresponding first screw 6a, manually swing the pressure roller 4 to press the sample, and then tighten the first screw 6a again.

[0042] Please see Figure 4 and Figure 5 In some embodiments, the platform 2 is fixedly connected to two vertical plates 2a. The two vertical plates 2a are provided with guide grooves 2a1 in the slotted pin pair. Both vertical plates 2a can also be adjusted along a second direction to a fixed position on the platform 2. More specifically, the vertical plates 2a may have oblong grooves 2a2, and a second screw 2b is threaded through the oblong grooves 2a2 and threaded onto the platform 2 to fix the vertical plates 2a and the platform 2.

[0043] When one pressure roller 4 is pressing the sample while the other pressure roller 4 is not, the following operation can be performed: loosen the corresponding second screw 2b, manually move the vertical plate 2a, change the position of the movable arm corresponding to the guide groove 2a1, so that the pressure roller 4 swings independently to press the sample, and then retighten the second screw 2b. Correspondingly, after moving the vertical plate 2a, the initial position of the movable arm corresponding to the guide groove 2a1 will also change, thereby changing the initial state of the pressure roller 4. Therefore, since the guide groove 2a1 has a horizontal groove, the change in the initial position of the movable arm corresponding to the guide groove 2a1 within the horizontal groove will not change the initial state of the pressure roller 4.

[0044] Please see Figure 6 In some embodiments, based on the embodiment where "the platform 2 is fixedly connected to two vertical plates 2a", a connecting key 6b is provided between the ends of the fixed arm 61 and the pressure roller 4. More specifically, the aforementioned first screw 6a is retained between the ends of the fixed arm 61 and the pressure roller 4, while a connecting key 6b is added.

[0045] If only the first screw 6a is used to fix the fixed arm 61 and the end of the pressure roller 4, this fixing method is not rigid. When the force is relatively large, relative misalignment or even loosening may occur between the fixed arm 61 and the end of the pressure roller 4. After adding the connecting key 6b, the relative rotation between the fixed arm 61 and the pressure roller 4 can be completely restricted by the rigid limit.

Claims

1. A friction table structure for a color fastness rubbing tester, characterized in that, include: Base (1), for mounting on the base of a color fastness rubbing tester; The platform (2) is mounted on the base (1) and its position can be adjusted along the first horizontal direction; Two mounting parts (3) are slidably connected to the platform (2) along a second direction that is perpendicular to the first direction and horizontal; Two eccentric pressure rollers (4) are rotatably connected to two mounting parts (3) about an axis in the first direction; The drive unit (5) is installed on the platform (2) and acts on the two mounting parts (3) to drive the two pressure rollers (4) to slide in opposite directions. Two swing arms (6) are respectively set on two pressure rollers (4); the swing arm (6) includes: a fixed arm body (61) fixedly connected to one end of the pressure roller (4), a movable arm body (62) that extends and retracts from the fixed arm body (61), and a spring (63); a grooved pin pair is also provided between the movable arm body (62) and the platform (2); Among them, the groove pin pair is used to drive the pressure roller (4) to swing relative to the mounting part (3) by sliding the mounting part (3) relative to the platform (2); the spring (63) is used to keep the movable arm (62) in the retracted position; after the roller surface of the two pressure rollers (4) presses the sample, the two pressure rollers (4) can still move away from each other without swinging by extending the swing arm (6).

2. The friction table structure of a color fastness rubbing tester according to claim 1, characterized in that, The platform (2) is fixedly connected to two vertical plates (2a); the two vertical plates (2a) are provided with guide grooves (2a1) in the slot pin pair; the two vertical plates (2a) can also be adjusted in the fixed position of the platform (2) along the second direction.

3. The friction table structure of the color fastness rubbing tester according to claim 2, characterized in that, A connecting key (6b) is provided between the fixed arm body (61) and the end of the pressure roller (4).

4. The friction table structure of a color fastness rubbing tester according to claim 1, characterized in that, The drive unit (5) is a lead screw module that uses a bidirectional lead screw.

5. The friction table structure of a color fastness rubbing tester according to claim 4, characterized in that, The platform (2) includes: a concave block (21) for connecting with the base (1) and a material plate (22) detachably connected to the concave block (21); the screw module is installed on the bottom surface of the material plate (22) on the platform (2).

6. The friction table structure of a color fastness rubbing tester according to claim 1, characterized in that, The platform (2) and the base (1) are connected by a damped sliding connection.

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