JP2007205997A - Abrasion testing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abrasion testing device which evaluates an abrasion situation of a rubber roll under a load applied condition, and also evaluates abrasion of the rubber roll under the condition where a mating side member is bitten in the rubber roll under a prescribed condition. <P>SOLUTION: This abrasion testing device is provided with a free roll 3 allowing selection between a function for contacting with the tested roll 2 by applying a prescribed load under the condition where an axial center is brought into parallel to the tested roll 2, and a function for contacting with the tested roll 2 while having a prescribed distance of an interaxial-center distance under the condition where the axial center is brought into parallel to the testing roll 2, the testing roll 2 is drive-rotated for a prescribed time in a state of a test sheet 50 being sandwiched between the testing roll 2 and the free roll 3, and the testing roll 2 is abraded under the condition in conformity with an actual system, so that the abrasion state is evaluated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a frictional state measuring apparatus for measuring the state of friction of a rubber roll, and in particular, for conveying papers and decurling papers in devices such as copying machines, printers, cash dispensers, automatic ticket gates, etc. The present invention relates to a wear test apparatus for measuring a wear state of a rubber roll used.

  Rubber rolls, which are components of devices such as copying machines and printers, transport (feed) sheets one by one, and there are various mechanisms for feeding using rubber rolls. For example, a corner separation method in which paper is pressed against a claw by a paper feed roll, a friction pad method in which paper is fed between a separation pad and a paper feed roll, a belt friction method in which paper is fed using a paper feed belt, A feed reverse system that feeds paper between a separation roll that rotates in the reverse direction and a paper feed roll is known.

  The paper feed roll is worn when the paper is transported for a predetermined time, and the transport performance deteriorates. Since there are various paper feeding mechanisms, the wear situation and the required wear resistance situation vary depending on the paper feed mechanism. For this reason, it is indispensable for the development and use of equipment to grasp the transition of wear condition and wear resistance of the paper feed roll and to determine or improve the performance of the rubber roll optimal for the equipment to be applied.

  Therefore, conventionally, an abrasive wheel is pressed against the outer surface of the rubber roll to grind the rubber roll, and the outer circumference of the rubber roll is actively worn to evaluate the wear situation by a change in weight (for example, patents). Reference 1, Patent Document 2, and Patent Document 3). In the conventional rubber roll evaluation test, the outer periphery of the grinding wheel rubber roll is actively worn, so that the wear state can be evaluated by reproducing the wear state in a short time.

  By the way, there are various types of paper feed mechanisms and papers, and required specifications such as hardness and frictional force of paper feed rolls (rubber rolls) are also various. For example, there is an apparatus provided with a curl removing roll for fixing a position of a paper feeding roll to bite a fixed amount into the other roll and removing the curl through the paper between the rolls in the biting state. In addition, the generation state of paper dust varies depending on the state of wear, and there is an increasing demand for grasping the wear state in detail.

  Although the conventional technology can reproduce the wear state of the rubber roll in a short time, depending on the type and usage of the rubber roll, such as a paper feed roll with different hardness and frictional force, or a curl roll used in a biting state, etc. Therefore, the wear state cannot be obtained, and the wear state according to the actual use condition cannot be obtained.

JP-A-8-178815 JP-A-8-233716 JP-A-9-126969

  The present invention has been made in view of the above situation, and an object thereof is to provide a wear test apparatus capable of obtaining a wear state in accordance with the use state of an actual machine without taking time.

  In order to achieve the above object, a first aspect of the present invention includes a contact member that is in contact with a predetermined load applied to the outer peripheral surface of a roll to be tested, and the contact member is applied with a predetermined load applied thereto. A wear test apparatus comprising a driving means for driving and rotating a roll to be tested that is in contact with the roll to wear.

  In the first aspect, a predetermined load corresponding to the use state is applied, and the roll to be tested that is in contact with the contact member in a state where the load is applied is driven and rotated, so that the wear state corresponding to the use state is obtained. Obtainable.

  In order to achieve the above object, a second aspect of the present invention is provided with a contact member that comes into contact with the outer peripheral surface of a roll under test at a predetermined pressing interval, and is in contact with the contact member at a predetermined pressing interval. There is provided a wear test apparatus comprising a drive means for driving and rotating the roll to wear the roll under test.

  In the second aspect, the contact member is brought into contact with the contact member at a predetermined pressing interval according to the use state, and the test roll that is in contact with the contact member at the predetermined press interval is driven to rotate, so that the use state is met. A wear state can be obtained.

  According to a third aspect of the present invention, in the wear test apparatus according to the first or second aspect, the contact member is a fixed roll whose axis is parallel to the roll under test. In the wear test equipment.

  In the third aspect, it is possible to obtain the wear state of the roll under test in contact with the fixed roll.

  According to a fourth aspect of the present invention, in the wear test apparatus according to the first or second aspect, the contact member is a rotating roll that is rotatable in a state where the axis is parallel to the roll to be tested. It is in the characteristic wear test equipment.

  In the fourth aspect, it is possible to obtain the wear state of the roll under test in contact with the rotating roll.

  According to a fifth aspect of the present invention, in the wear test apparatus according to the first or second aspect, the contact member includes a rotating roll that is rotatable in a state where the axis is parallel to the roll to be tested, A wear test apparatus comprising a test sheet sandwiched between a roll and a rotating roll.

  In the fifth aspect, the wear state of the roll under test can be obtained in a state where the test sheet is sandwiched between the rotary roll.

  A sixth aspect of the present invention is the wear test apparatus according to the fifth aspect, wherein the test sheet is an abrasive sheet.

  In the sixth aspect, the abrasion state can be obtained by wearing the roll under test in a short time while grinding with the abrasive sheet sandwiched therebetween.

  According to a seventh aspect of the present invention, in the friction test apparatus according to the fifth or sixth aspect, the test sheet is supported so as to be movable in a direction in which the test sheet is conveyed between the roll to be tested and the rotating roll. An abrasion test apparatus comprising a conveying means for conveying a test sheet at a speed slower than the peripheral speed of the roll.

  In the seventh aspect, the test sheet is conveyed at a speed slower than the peripheral speed of the roll under test, and the test sheet at a new part is always brought into contact with the test sheet to obtain a worn state.

  The eighth aspect of the present invention for achieving the above object is to provide a rotating roll that can be contacted in a state where the axis is parallel to the roll to be tested, and to apply a predetermined load between the roll to be tested and the rotating roll. Load applying means, and drive means for driving and rotating the roll under test in a state in which a predetermined load is applied by the load applying means, and wearing the roll under test, and after the drive rotation for a predetermined time The wear test apparatus is characterized in that the wear state is evaluated by changing the diameter of the roll.

  In the eighth aspect, a wear state according to the use state is obtained by driving and rotating the roll under test in a state where a predetermined load according to the use state is applied by the load applying means to wear the roll under test. be able to.

  The ninth aspect of the present invention for achieving the above object is to bring a rotating roll that can be contacted in a state where its axis is parallel to the roll to be tested, and the roll to be tested and the rotating roll in contact at a predetermined pressing interval. A contact applying means for driving and a drive means for driving and rotating the roll under test abutted on the contact member at a predetermined pressing interval by the contact applying means, and driving and rotating the roll under test for a predetermined time. The wear test apparatus is characterized in that the wear state is evaluated by a change in the weight of the roll to be tested.

  In the ninth aspect, the roll to be tested is brought into contact with the rotating roll at a predetermined pressing interval according to the use state by the contact applying means, and the roll to be tested that contacts at the predetermined pressing interval is driven to rotate to wear the roll to be tested. By doing so, the wear state according to a use condition can be obtained.

  In order to achieve the above object, a tenth aspect of the present invention includes: a roll to be tested supported by a base; a base base supported by the base so as to be movable up and down; and a swingable support with respect to the base base. A support arm that is rotatably supported at one end of the support arm and that is in contact with the roll to be tested in a state where the axis is parallel, and a rotation roll that adjusts the swinging state of the support arm and is unloaded A constant load adjusting mechanism for contacting the roll to be tested, a load applying means for applying a predetermined load to the roll to be tested by applying a load to the rotating roll adjusted by the constant load adjusting mechanism, and a support arm A fixed position adjusting mechanism that adjusts the swing condition and makes the rotating roll contact the roll under test at a predetermined pressing interval, a selection means that selects the operation of the constant load adjusting mechanism and the fixed position adjusting mechanism, and a constant load by the selecting means. Adjustment mechanism selected When a predetermined load is applied to the roll under test, the roll under test is driven and rotated while the test sheet is sandwiched between the roll under test and the rotating roll, and the roll under test is selected. Drive means for driving and rotating the roll under test while the test sheet is sandwiched between the roll under test and the rotating roll when the fixed position adjustment mechanism is selected by the means. When the constant load adjustment mechanism is selected, the wear state is evaluated based on the change in the diameter of the roll to be tested after the drive rotation for a predetermined time. On the other hand, when the fixed position adjustment mechanism is selected, the rotation is driven for a predetermined time. The wear test apparatus is characterized in that the wear state is evaluated based on a change in the weight of the roll to be tested after the test.

  In the tenth aspect, when the constant load adjusting mechanism is selected by the selecting means and a predetermined load is applied to the roll to be tested by the load applying means, the test sheet is sandwiched between the roll to be tested and the rotating roll. In this state, the roll under test is driven to rotate to wear the roll under test, and the wear state is evaluated by the change in the diameter of the roll under test. On the other hand, when the fixed position adjusting mechanism is selected by the selection means, the swinging state of the support arm is adjusted, the rotating roll is brought into contact with the roll under test at a predetermined pressing interval, and the gap between the roll under test and the rotating roll is adjusted. With the test sheet sandwiched between them, the roll under test is driven and rotated to wear the roll under test, and the wear state is evaluated by the change in the weight of the roll under test.

  An eleventh aspect of the present invention is the wear test apparatus according to the tenth aspect, wherein the test sheet is supported so as to be movable in the direction of being transported between the roll under test and the rotating roll, and the circumference of the roll under test is The wear test apparatus includes a conveying unit that conveys the test sheet at a speed lower than the speed.

  In the eleventh aspect, the test sheet is conveyed at a speed slower than the peripheral speed of the roll under test, and the test sheet at a new part is always brought into contact with the test sheet to obtain a worn state.

  According to a twelfth aspect of the present invention, there is provided the wear test apparatus according to the eleventh aspect, wherein the test sheet conveyed by the conveying means is wound around a feeding roll.

  In the twelfth aspect, the test sheet wound around the feed roll can be fed and conveyed.

  A thirteenth aspect of the present invention is the wear test apparatus according to the eleventh aspect, wherein the test sheet transported by the transport means is an endless polishing sheet.

  In the thirteenth aspect, the wear state can be obtained by wearing the roll under test in a short time while grinding with the polishing sheet sandwiched therebetween.

  The wear test apparatus of the present invention is a wear test apparatus that can obtain a wear state in accordance with the use state of an actual machine without taking time.

  The wear test apparatus according to the present invention has a function of applying a predetermined load to a roll under test in a state where the axis is parallel and a contact with the roll under test, and a distance between the axes when the axis is parallel to the roll under test. Provided with a free roll as a contact member (rotating roll) that is selected for the function of contacting at a distance, the roll under test is driven and rotated while the roll under test to which a predetermined load is applied and the free roll are in contact with each other Drive means are provided.

  Then, a test sheet is sandwiched between a roll to be tested and a free roll that are in contact with each other with a predetermined load applied, and the roll to be tested is driven and rotated by a driving means, and the test sheet is moved from the peripheral speed of the roll to be tested. Also, the state of wear is evaluated based on the change in the diameter of the roll under test after the roll under test is worn at a slow speed to wear and the drive roll is rotated for a predetermined time.

  In addition, the test sheet is sandwiched between the roll under test and the free roll that are in contact with each other at a predetermined distance between the axes, and the test roll is driven and rotated by the driving means, and the test sheet is moved from the peripheral speed of the roll under test. Also, the state of wear is evaluated by changing the weight of the roll to be tested after the roll to be tested is worn at a slow speed to wear and rotated for a predetermined time.

  For this reason, in addition to evaluating the wear status of the roll under test in a situation where a load is applied via the free roll with one device, wear in the situation where the free roll is bitten into the roll under test in a predetermined state Can be evaluated.

  A first embodiment of the present invention will be specifically described with reference to FIGS.

  FIG. 1 is a perspective view of a wear test apparatus according to a first embodiment of the present invention, FIG. 2 is a side view of the wear test apparatus according to the first embodiment of the present invention, and FIG. 4 shows a plan view of the wear test apparatus according to the embodiment, FIG. 4 shows the result of the wear state in a constant load state, and FIG. 5 shows the result of the wear state in a constant displacement.

  The wear test apparatus will be described with reference to FIGS.

  As shown in the figure, a base roll 1 supports a test roll 2 that can be driven and rotated, and is provided with a free roll 3 that can be contacted with the test roll 2 in a state where its axis is parallel. The free roll 3 is supported on a base table 4 that can be moved up and down via a support arm 5. The support arm 5 is adjusted in a swinging state by a constant load adjusting mechanism 6, and the roll 2 to be tested is in a state where the free roll 3 is unloaded. To touch. The free roll 3 is provided with a support frame 8 on which the weight 10 can be placed. By placing the weight 10 on the support frame 8 of the free roll 3 adjusted by the constant load adjusting mechanism 6, the roll to be tested A predetermined load (weight of the weight 10) can be applied to 2 (load applying means).

  At this time, the free roll 3 is brought into contact with the roll 2 to be tested, but it is also possible to drive the free roll 3 in the reverse direction.

  Further, a fixed position adjusting mechanism 9 for adjusting the swinging state of the support arm 5 to bring the free roll 3 into contact with the roll 2 to be tested at a fixed position is provided. The fixed position adjusting mechanism 9 is loaded with a weight 10. The support arm 5 in an unexposed state is restrained, and the support arm 5 is swung so that the free roll 3 is pressed against the roll 2 to be tested. And when making the constant load adjustment mechanism 6 function, the restraint of the support arm 5 is released (selection means).

  On the other hand, a roll 51 around which a test paper 50 as a test sheet is wound is rotatably supported on the base 1, the test paper 50 is fed out from the roll 51, and the test paper 50 is fed to the roll 2 to be tested and the free roll 3. It is designed to be sandwiched between. The base 1 on the feed side of the roll 51 is provided with a pair of transport rolls 52 and 53, and the test paper 50 sandwiched between the pair of transport rolls 52 and 53 is transported to the roll to be tested 2 and the free roll 3 side. . A guide member 54 that guides the test paper 50 straight with respect to the pair of transport rolls 52 and 53 is provided in the transport path of the test paper 50 between the pair of transport rolls 52 and 53 and the roll to be tested 2 and the free roll 3. The support 59 is supported and arranged.

  With the test paper 50 sandwiched between the roll 2 to be tested and the free roll 3, the roll 2 to be tested is driven and rotated for a predetermined time to wear the roll 2 to be tested, and the state of wear is evaluated. At this time, the state of wear of the roll 2 to be tested in a constant load state can be obtained by applying a load with the weight 10 having a predetermined weight. Further, the wear state of the roll under test 2 in the fixed position state can be obtained by causing the constant load adjusting mechanism 6 to function and swinging the support arm 5 while pressing the free roll 3 against the roll under test 2. Then, by transporting the test paper 50 at a speed slower than the peripheral speed of the roll under test 2, a new part of the test paper 50 can always be sandwiched between the roll under test 2 and the free roll 3.

  When the roll 2 to be tested is worn in a constant load state, the wear is evaluated by, for example, a change in the diameter of the roll 2 to be tested. When the roll 2 to be tested is worn in a fixed position, the wear is evaluated by, for example, a change in the weight of the roll 2 to be tested.

  The wear test apparatus will be described in detail.

  A support column 21 is provided on the base 1, and a support shaft 22 that supports one end of the central shaft 2 a of the roll 2 to be tested is provided on the support column 21 so as to be movable in the axial direction. The base 1 is provided with a drive motor 23, and the other end of the central shaft 2 a of the roll 2 to be tested is supported on the drive shaft of the drive motor 23. The roll under test 2 can be attached and detached by moving the support shaft 22 in the axial direction.

  The base 1 is provided with a base 4 that can be raised and lowered. The base 4 is fixed to the upper end of the screw shaft 24, and the lower portion of the screw shaft 24 is supported by a support member 25 so as to be able to move up and down in a state where rotation is restricted. The support member 25 is provided with a nut member 26 that is screwed onto the screw shaft 24, and the screw shaft 24 moves up and down by rotating the nut member 26 via the lever 27, and the base 4 moves up and down together with the screw shaft 24. . In the figure, 28 is a slide guide for raising and lowering the base 4 horizontally.

  A swing guide 31 is fixed to the base 4, and a support arm 5 swinging around a central axis extending in parallel along the axial direction of the roll 2 to be tested is supported on the swing guide 31. The free roll 3 is rotatably supported at the tip of the support arm 5 (the right end in FIGS. 2 and 3). A support frame 8 is disposed above the free roll 3, and the shaft end of the free roll 3 is rotatably supported at both ends of the support frame 8. Both ends of the support frame 8 are configured to be openable and closable, and the freeroll 3 can be easily replaced by opening and closing the both ends 8. A weight 10 is placed on the upper surface of the support frame 8. By placing the weight 10 on the upper surface of the support frame 8, a load is applied to the roll 2 to be tested by the free roll 3 with the weight of the weight 10. be able to.

  On the other hand, an adjustment screw shaft 34 is provided at the other end of the support arm 5 across the swing center, and a weight 35 is screwed onto the adjustment screw shaft 34. By rotating the weight 35, the position of the weight 35 in the longitudinal direction with respect to the adjustment screw shaft 34 is adjusted, and the swinging state of the support arm 5 is balanced, and the free roll 3 is brought into contact with the roll 2 to be tested in an unloaded state. (Constant load adjustment mechanism). The state of balance (horizontal state) can be easily confirmed by, for example, placing a level on the support arm 5 and confirming the parallel state. It is also possible to attach a level to the support arm 5 in advance.

  A base frame 4 positioned between the swing center of the support arm 5 and the support frame 8 is provided with fixed frame members 36 located on both sides (upper and lower in FIG. 3) of the support arm 5, and one fixed frame. One end of a fixed frame 37 is rotatably supported at the upper end of the member 36 (lower side in FIG. 3). The other end of the fixed frame 37 is attached to the upper end of the other fixed frame member (upper side in FIG. 3) via a stopper 38. The fixed frame 37 is arranged above the support arm 5 by rotating the fixed frame 37 and attaching the other end to the other fixed frame member 36 via the stopper 38.

  The fixing frame 37 is provided with a push screw 39. When the push screw 39 is screwed in, the tip of the push screw 39 comes into contact with the support arm 5, and the support arm 5 is restrained. By further screwing the push screw 39, the support arm 5 can be swung downward, that is, the swing state can be adjusted by positioning and swinging the support arm 5, and the free roll 3 can be moved to a fixed position. Can be brought into contact with the roll 2 to be tested. The screwing amount of the push screw 39 can be read by the scale member 40, and the biting amount of the free roll 3 with respect to the roll to be tested 2 can be quantitatively grasped (fixed position adjusting mechanism).

  By removing the stopper 38 and rotating the fixed frame 37, the restraint of the support arm 5 can be released. In this state, the constant load adjustment mechanism can be operated to balance the swinging state so that the free roll 3 is brought into contact with the roll 2 to be tested in an unloaded state. A load can be applied to the roll 2 to be tested. That is, the selection means for selecting the operation of the constant load adjusting mechanism and the fixed position adjusting mechanism is configured by the rotation of the fixed frame 37 constituting the fixed position adjusting mechanism.

  The roll 51 around which the test paper 50 is wound is rotatably supported by the feeding base 56, and the pair of transport rolls 52 and 53 are rotatably supported by the rotation support base 57 on the base 1 on the feeding side of the roll 51. Has been. A drive motor 58 is connected to the shaft end of the upper transport roll 52, and the pair of transport rolls 52 and 53 are rotated in opposite directions by driving of the drive motor 58, so that the test paper 50 and the free roll 3 To the side. The rotation speed of the drive motor 58 is set to be a speed at which the test paper 50 moves minutely (for example, 5 mm / min) and is set to be slower than the rotation speed of the roll 2 to be tested by driving the drive motor 23. Has been.

  The situation of the wear test of the roll 2 under constant load will be described.

  In the case of a test with a constant load, the stopper 38 is removed and the fixed frame 37 is rotated to make the support arm 5 swingable. The weight 35 is adjusted to move the weight 35 to an arbitrary position of the adjustment screw shaft 34, and the support arm 5 is balanced so that the free roll 3 is in contact with the roll 2 to be tested without load. In this state, a predetermined load can be applied to the roll to be tested 2 via the free roll 3 by placing the weight 10 having a weight corresponding to the desired load on the support frame 8.

  In a state where a predetermined load is applied to the roll 2 to be tested, the test paper 50 fed out from the roll 51 and carried by the transport rolls 52 and 53 is sandwiched between the roll 2 to be tested and the free roll 3, and the drive motor 23 The roll 2 to be tested is driven to rotate by driving to wear the roll 2 to be tested which is in contact with the test paper 50.

  At this time, the test paper 50 is transported at a very low speed by the micro-rotation driving of the transport roll 52 by the drive motor 58, and the test is performed in a state where braking is applied to the transport force of the test paper 50 by the driving rotation of the roll 2 to be tested. The roll 2 comes into contact with the test paper 50. For this reason, a predetermined wear state can be ensured and a new portion of the test paper 50 can always be brought into contact with the roll 2 to be tested, and the influence of paper dust or the like not directly related to the wear of the roll 2 to be tested can be eliminated. The test roll 2 can be worn.

  The roll 2 to be tested that is in contact with the test paper 50 is continuously driven and rotated for a predetermined time, and the wear of the roll 2 to be tested is evaluated by the change (decrease) in the outer diameter. Therefore, it is possible to evaluate the wear state of the roll 2 to be tested applied to the paper feed roll, the transport roll, etc. in a state in accordance with the actual machine.

  In the above-described embodiment, the test paper 50 sandwiched between the rotatable free rolls 3 as the contact member has been described as an example, but the test paper 50 is used by using a roll in a state where the rotation is fixed. It is also possible to contact the roll 2 to be tested without intervening.

  Based on FIG. 4, the abrasion test situation of the roll 2 under test will be specifically described.

As the roll 2 to be tested, the following roll foam was used. A foam stabilizer and an anti-aging agent were added to 100 parts by weight of a caprolactone-based polyurethane prepolymer (RV2600: manufactured by Dainippon Ink and Chemicals, Inc.), and the mixture was stirred with a mechanical floss for 5 minutes. Thereafter, 33.9 parts by weight of a mixture of a chain extender 1,6-hexanediol / crosslinking agent polycaprolactone triol (PCL320: manufactured by Daicel Chemical Industries, Ltd.) = 70/30 as a curing agent and 0.05% water What was mixed with parts by weight and stirred for 3 minutes with mechanical floss was poured into a mold heated to 120 ° C. so that the foaming density was 0.4 g / cm ^3, and taken out after 50 minutes. The obtained roll was ground and cut off to obtain a roll foam of outer diameter φ27 mm × inner diameter φ17 mm × width 24 mm.

  The test conditions were a wear test in a test environment at a normal temperature and humidity (22 ° C., 55% Rh) using a load of 400 gf, a rotation speed of the test roll 2 of 300 rpm, and plain paper. A wear test was conducted continuously for 150 minutes, and the change of the outer diameter of the roll 2 to be tested is shown in FIG.

  As shown in FIG. 4, the outer diameter of the roll 2 to be tested gradually decreased with the passage of time, and after 150 minutes, for example, 27 mm decreased by about 20/100 mm. That is, the outer diameter of the roll 2 to be tested decreases by about 3/100 mm after 30 minutes, decreases by about 6/100 mm after 60 minutes, decreases by about 10/100 mm after 90 minutes, and after 120 minutes. Was reduced by about 15 mm / 100 mm, and after 150 minutes, it was confirmed that it was reduced by about 20/100 mm.

  Thus, it is confirmed that the outer diameter of the roll 2 to be tested gradually decreases with time, and the wear state of the roll 2 to be tested at a constant load can be evaluated according to the situation of the gradual decrease of the outer diameter.

  The situation of the wear test of the roll 2 to be tested at a fixed position will be described.

  When the free roll 3 is bitten into the roll 2 to be tested in a predetermined state, the fixed frame 37 is rotated, the fixed frame 37 is fixed to the fixed frame member 36 by the stopper 38, and the push screw 39 is applied to the support arm 5. The swing of the support arm 5 is restrained by contacting.

  The push screw 39 is screwed to swing the support arm 5 downward, and the support arm 5 is positioned and swinged to adjust the swing state (biting amount). The screwing amount (biting amount) of the push screw 39 is read by the scale member 40, and the biting amount of the free roll 3 with respect to the roll under test 2, that is, the distance between the axes of the roll under test 2 and the free roll 3 is set to a predetermined distance. To do.

  With the biting amount of the free roll 3 with respect to the roll to be tested 2 set to a predetermined state, the test paper 50 fed out from the roll 51 and conveyed by the transport rolls 52 and 53 is placed between the roll to be tested 2 and the free roll 3. The roll 2 to be tested is driven and rotated by the drive motor 23 to wear the roll 2 to be tested which is in contact with the test paper 50.

  At this time, the test paper 50 is transported at a very low speed by the micro-rotation driving of the transport roll 52 by the drive motor 58, and the test is performed in a state where braking is applied to the transport force of the test paper 50 by the driving rotation of the roll 2 to be tested. The roll 2 comes into contact with the test paper 50. For this reason, a predetermined wear state can be ensured and a new portion of the test paper 50 can always be brought into contact with the roll 2 to be tested, and the influence of paper dust or the like not directly related to the wear of the roll 2 to be tested can be eliminated. The test roll 2 can be worn.

  The roll 2 to be tested which is in contact with the test paper 50 is continuously driven and rotated for a predetermined time, the wear amount is obtained from the relationship between the wear weight and the specific gravity, and the wear of the roll 2 to be tested is evaluated. Therefore, it becomes possible to evaluate the wear state of the roll 2 to be tested applied to the curl removing roll or the like in a state suitable for the actual machine.

  Based on FIG. 5, the abrasion test situation of the roll 2 to be tested will be specifically described.

  As the roll 2 to be tested, the following roll foam was used. EPDM 100 parts by weight, silica 15 parts by weight, zinc oxide 5 parts by weight, stearic acid 1 part by weight, polyethylene glycol 1 part by weight, vulcanization accelerator 5 parts by weight, sulfur 1 part by weight, foaming agent 8 parts by weight Vulcanization and foaming was performed at a magnification of 2.4 times to obtain a roll foam having an outer diameter of 22 mm, an inner diameter of 10 mm, and a width of 22 mm.

The test conditions were as follows: the rotation speed of the roll 2 to be tested was 270 rpm, the paper feed speed was 1 mm / sec using genuine roll paper, the free roll 3 had an outer diameter of 10 mm, the biting amount was 1 mm, and normal temperature and humidity (22 ° C., 50% Rh). A wear test was performed in a test environment. A wear test was performed continuously for 120 minutes, and a value obtained by dividing the weight (g) of the wear powder of the roll 2 to be tested by the specific gravity (g / cm ³ ) of the roll 2 to be tested was defined as the amount of wear (cm ³ ). The change state of the amount of wear (cm ³ ) is shown in FIG.

As shown in FIG. 5, the wear amount of the roll 2 to be tested increased with the passage of time, and, for example, reached 0.182 (cm ³ ) after 120 minutes. In other words, the wear amount of the test roll 2 (cm ^3), 8 of 1000 minutes after 30 minutes (cm ^3), and the 1000th after 60 minutes 39 (cm ^3), and the 1000th after 90 minutes 113 (cm ³ ), and after 120 minutes, it was confirmed that it became 182/1000 (cm ³ ).

Thus, under test roll 2 is confirmed that the abrasion loss over time (cm ³⁾ is increased, the wear amount (cm ³⁾ wear of the test roll 2 in position in accordance with the situation of an increase in The situation can be evaluated.

  As described above, it is possible to obtain the wear state of the roll under test 2 in a constant load state and a fixed position state by one wear test apparatus. It can be evaluated with a single device. As a result, a wear test can be performed in a situation very close to the actual machine. The wear test can be performed in a situation very close to that of the actual machine, especially for soft rolls such as rubber, sponge, urethane, and EPDM. It becomes possible to evaluate.

  A second embodiment of the present invention will be described with reference to FIGS.

  FIG. 6 is a perspective view of a wear test apparatus according to the second embodiment of the present invention, FIG. 7 is a side view of the wear test apparatus according to the second embodiment of the present invention, and FIG. 1 shows a plan view of a wear test apparatus according to an embodiment.

  The wear test apparatus according to the second embodiment has a configuration in which an endless polishing cloth is sandwiched between a roll under test 2 and a free roll 3 to enable an accelerated test. That is, in place of the roll 51, the transport rolls 52 and 53, and the guide member 54 of the test paper 50 in the first embodiment shown in FIGS. 1 to 3, a configuration provided with an endless polishing cloth as an abrasive sheet; It has become. For this reason, the same members as in the first embodiment (constant load adjusting mechanism 6 and fixed position adjusting mechanism 9 which are mechanisms for supporting the roll 2 to be tested and the free roll 3) are assigned the same reference numerals and redundant explanations are given. It is omitted.

  As shown in the figure, an endless polishing cloth 71 is provided between the roll under test 2 and the free roll 3, and the polishing surface (inner peripheral surface) of the polishing cloth 71 is in contact with the outer peripheral surface of the roll under test 2. It is like that. The polishing pad 71 is fed by the feed mechanism 72 at a speed slower than the peripheral speed of the roll 2 to be tested. That is, a pair of drive rolls 73 and 74 are supported on the base 1 below the roll to be tested 2 and the free roll 3, and the pair of drive rolls 73 and 74 are respectively inside the polishing cloth 71 (polishing surface side). Driven rollers 75 and 76 which are in contact with the driving rolls 73 and 74 with the abrasive cloth 71 interposed therebetween. Drive motors 77 and 78 are connected to the drive rolls 73 and 74, respectively. The endless polishing cloth 71 is guided to move in a state where a predetermined tension is maintained by a pair of upper and lower guide rolls 81 and 82 provided on the entry side and the exit side of the roll 2 to be tested and the free roll 3. Has been.

  In addition, although it was set as the structure which can use a polishing surface repeatedly by making the polishing cloth 71 endless, it is also possible to make it the structure which moves a polishing surface sequentially using a sheet-like polishing cloth.

  The situation of the wear test of the roll 2 under constant load will be described.

  In the case of a test with a constant load, the support arm 5 is balanced in a state where the free roll 3 is in contact with the roll 2 to be tested with no load, as in the first embodiment. In this state, by placing the weight 10 having a weight corresponding to a desired load on the support frame 8, a predetermined load can be applied to the roll to be tested 2 with the polishing pad 71 interposed therebetween via the free roll 3.

  In a state where a predetermined load is applied to the roll 2 to be tested with the polishing pad 71 interposed therebetween, the roll 2 to be tested is driven and rotated by the drive motor 23 to wear the roll 2 to be tested which is in contact with the polishing pad 71. At this time, the polishing cloth 71 was conveyed at a minute speed by the minute rotation driving of the driving rolls 73 and 74 by the driving motors 77 and 78, and braking was applied to the conveying force of the polishing cloth 71 by the driving rotation of the roll 2 to be tested. In this state, the roll 2 to be tested comes into contact with the polishing surface of the polishing pad 71. For this reason, it is possible to ensure a high-speed wear state in a state where the polishing by the polishing surface is applied and to bring the polishing cloth 71 into contact with the roll 2 to be tested, and to reproduce the accelerated wear state and wear the roll 2 to be tested. Can be made. For this reason, the roll 2 to be tested can be worn while minimizing the influence of an oil film or the like due to a degreasing condition or the like.

  The roll 2 to be tested that is in contact with the polishing pad 71 is continuously driven and rotated for a predetermined time, and the wear of the roll 2 to be tested is evaluated by the change (decrease) in the outer diameter. Therefore, it becomes possible to evaluate the wear state of the roll 2 to be tested applied to the paper feed roll, the transport roll, etc. in a state that is accelerated and matches the actual machine.

  The situation of the wear test of the roll 2 to be tested at a fixed position will be described.

  When the free roll 3 is bitten into the roll to be tested 2 in a predetermined state, as in the first embodiment, the push screw 39 is brought into contact with the support arm 5 to restrain the swing of the support arm 5. The push screw 39 is screwed to swing the support arm 5 downward, the support arm 5 is positioned and swung to adjust the swinging state (biting amount), and the biting amount of the free roll 3, that is, the polishing cloth 71 is moved. The interaxial distance between the sandwiched roll 2 to be tested and the free roll 3 is set to a predetermined distance.

  The amount of biting of the free roll 3 with respect to the roll to be tested 2 is set to a predetermined state with the polishing cloth 71 interposed therebetween, and the roll to be tested is brought into contact with the polishing cloth 71 by driving and rotating the roll to be tested 2 by driving the drive motor 23. 2 is worn. At this time, the polishing cloth 71 was conveyed at a minute speed by the minute rotation driving of the driving rolls 73 and 74 by the driving motors 77 and 78, and braking was applied to the conveying force of the polishing cloth 71 by the driving rotation of the roll 2 to be tested. In this state, the roll 2 to be tested comes into contact with the polishing surface of the polishing pad 71. For this reason, it is possible to ensure a high-speed wear state in a state where the polishing by the polishing surface is applied and to bring the polishing cloth 71 into contact with the roll 2 to be tested, and to reproduce the accelerated wear state and wear the roll 2 to be tested. Can be made. For this reason, the roll 2 to be tested can be worn while minimizing the influence of an oil film or the like due to a degreasing condition or the like.

  The roll 2 to be tested which is in contact with the polishing pad 71 is continuously driven and rotated for a predetermined time, the amount of wear is determined from the relationship between the wear weight and the specific gravity, and the wear of the roll 2 to be tested is evaluated. Therefore, it becomes possible to evaluate the wear state of the roll 2 to be tested applied to the curl removing roll or the like in a state that is accelerated and matches the actual machine.

  By using the above-described wear test device, various functions are required such as copying machines, printers, cash deposit machines, automatic ticket gates, etc., used for transporting paper and decurling paper. It becomes possible to evaluate the wear state of the rubber roll with a single test apparatus. For example, it is possible to evaluate the wear state of rubber rolls such as a transport roll, a paper feed roll, a separation roll, a developing roll, a transfer roll, a charging roll, and a fixing roll in various OA devices with a single test apparatus.

  INDUSTRIAL APPLICABILITY The present invention is a wear test apparatus for testing the state of wear of a rubber roll, and in particular, is used for conveying paper and decurling paper in a copying machine, printer, cash dispenser, automatic ticket gate, etc. It can be used in the industrial field of a wear test apparatus for evaluating the wear state of a rubber roll.

1 is a perspective view of a wear test apparatus according to a first embodiment of the present invention. 1 is a side view of a wear test apparatus according to a first embodiment of the present invention. 1 is a plan view of a wear test apparatus according to a first embodiment of the present invention. It is a graph showing the result of the wear condition in a constant load state. It is a graph showing the result of the wear condition in constant displacement. It is a perspective view of the abrasion testing apparatus which concerns on the 2nd Example of this invention. It is a side view of the abrasion test apparatus which concerns on the 2nd Example of this invention. It is a top view of the abrasion testing apparatus concerning the example of a 2nd embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Test roll 3 Free roll 4 Base stand 5 Support arm 6 Constant load measuring mechanism 8 Support frame 9 Fixed position adjustment mechanism 10 Weight 11 Paper member 21 Support pillar 22 Support shaft 23 Drive motor 24 Screw shaft 25 Support member 26 Nut material 27 Lever 31 Swing guide 33 Mounting frame 34 Adjustment screw shaft 35 Weight 36 Fixed frame member 37 Fixed frame 38 Stopper 40 Scale member 50 Test paper 51 Roll 52 Transport roll 54 Guide member 56 Feeding table 57 Rotation support table 58 Drive motor 59 Post 71 Abrasive cloth 72 Feed mechanism 73, 74 Drive roll 75, 76 Driven roll 77, 78 Drive motor

Claims (13)

  A contact member that contacts the outer peripheral surface of the roll under test with a predetermined load applied thereto is provided, and the roll under test is driven by rotating the roll under test that is in contact with the contact member with a predetermined load applied. A wear test apparatus comprising a drive means for wearing.   A contact member that contacts the outer peripheral surface of the roll to be tested at a predetermined pressing interval is provided, and a driving unit that wears the roll to be tested by driving and rotating the roll to be tested that is in contact with the contact member at a predetermined pressing interval. A wear test apparatus characterized by that. The wear test apparatus according to claim 1 or 2,
The wear test apparatus, wherein the contact member is a fixed roll having an axis parallel to the roll to be tested. The wear test apparatus according to claim 1 or 2,
The wear test apparatus, wherein the contact member is a rotating roll that is rotatable in a state in which an axis is parallel to the roll to be tested. The wear test apparatus according to claim 1 or 2,
The contact member is composed of a rotating roll that is rotatable with its axis parallel to the roll to be tested, and a test sheet that is sandwiched between the roll to be tested and the rotating roll. The wear test apparatus according to claim 5,
A wear test apparatus, wherein the test sheet is an abrasive sheet. In the wear test apparatus according to claim 5 or 6,
The test sheet is supported so as to be movable in a direction in which the test sheet is transported between the roll to be tested and the rotating roll, and includes a transport unit that transports the test sheet at a speed lower than the peripheral speed of the roll to be tested. Wear test equipment. A rotating roll that can be freely contacted with its axis parallel to the roll under test;
A load applying means for applying a predetermined load between the roll to be tested and the rotating roll;
Driving means for driving and rotating the roll under test in a state where a predetermined load is applied by the load adding means, and wearing the roll under test.
A wear test apparatus characterized in that a wear state is evaluated by a change in a diameter of a roll to be tested after being driven to rotate for a predetermined time. A rotating roll that can be freely contacted with its axis parallel to the roll under test;
Contact imparting means for contacting the roll to be tested and the rotating roll at a predetermined pressing interval;
Drive means for driving and rotating the roll under test abutted against the contact member at a predetermined pressing interval by the contact applying means, and wearing the roll under test.
A wear test apparatus characterized in that a wear state is evaluated by a change in a weight of a roll to be tested after being rotated by driving for a predetermined time. A roll under test supported by a base;
A base stand supported by the base so as to be movable up and down;
A support arm that is swingably supported with respect to the base table;
A rotating roll that is rotatably supported at one end of a support arm and that contacts the roll under test in a state where the axis is parallel;
A constant load adjustment mechanism that adjusts the swinging state of the support arm to bring the rotating roll into contact with the roll under test in an unloaded state;
Load applying means for applying a predetermined load to the roll under test by applying a load to the rotating roll adjusted by the constant load adjusting mechanism;
A fixed position adjusting mechanism that adjusts the swinging state of the support arm to bring the rotating roll into contact with the roll under test at a predetermined pressing interval;
Selection means for selecting the operation of the constant load adjustment mechanism and the fixed position adjustment mechanism;
When the constant load adjustment mechanism is selected by the selection means and a predetermined load is applied to the roll under test, the roll under test is driven to rotate with the test sheet sandwiched between the roll under test and the rotating roll. When the fixed position adjustment mechanism is selected by the selection means, the roll to be tested is driven and rotated while the test sheet is sandwiched between the roll to be tested and the rotating roll. A driving means for wearing the test roll,
When the constant load adjustment mechanism is selected, the wear state is evaluated by the change in the diameter of the roll to be tested after the drive rotation for a predetermined time. On the other hand, when the fixed position adjustment mechanism is selected, the wear rotation is performed for a predetermined time. A wear test apparatus characterized in that the wear state is evaluated by a change in the weight of the roll to be tested after the test. The wear test apparatus according to claim 10,
The test sheet is supported so as to be movable in a direction in which the test sheet is transported between the roll to be tested and the rotating roll, and includes a transport unit that transports the test sheet at a speed lower than the peripheral speed of the roll to be tested. Wear test equipment. The wear test apparatus according to claim 11,
A wear test apparatus, wherein the test sheet conveyed by the conveying means is wound around a feeding roll. The wear test apparatus according to claim 11,
A wear test apparatus, wherein the test sheet conveyed by the conveying means is an endless polishing sheet.

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