JP2010253661A - Shape steel surface polishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shape steel surface polishing device allowing simultaneously obtaining of high polishing efficiency and uniform polishing following waviness formed on a surface of a connecting part of shape steel, when grinding the connecting part of the shape steel. <P>SOLUTION: A disc-shaped oscillating member 52 is mounted to be oscillatable and relatively non-rotatable with an oscillation center point P provided on a rotation center C of a fixing member 50 as a center on an opposite side of a rotary shaft 32 of the fixing member 50 fixed to a shaft end of the rotary shaft 32. The oscillating member 52 is energized by an outside coil spring (energizing member) 56 so that the oscillating member 52 may approach the fixing member 50 side. An outer peripheral grinding tool 54 fixed to an outer peripheral part of the oscillating member 52 to be on an opposite side of the fixing member 50 is pressed on the H-shape steel 12, and polishing is performed. Pressing force from the rotary shaft 32 is transmitted as it is to the oscillating member 52, and thereby high polishing efficiency can be obtained. The oscillating member 52 oscillates according to waviness of the surface of the H-shape steel 12, and thereby suitable polishing following the waviness can be obtained. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a shaped steel surface polishing apparatus that polishes the surface of a shaped steel such as an H-shaped steel, an L-shaped steel, and an I-shaped steel in order to remove an oxide film and burrs from a processed hole.

  Shape steels such as H-shape steel, L-shape steel, and I-shape steel have cross sections such as H-shape, L-shape, and I-shape, and are several meters so that they can be used as structural materials for buildings. Or it is the longitudinal steel material which has a fixed length of about ten or more meters. Such shaped steel has, for example, a plurality of through holes for inserting a plurality of bolts or rivets in a connecting portion for connecting to another steel material, for example, at an end portion or an intermediate portion prior to connection work at a work site. Are arranged in a predetermined pattern, and surface polishing or surface grinding for removing burrs of processed holes generated at the time of forming through-holes and oxide films such as black skin generated on the surface at the end or intermediate portion thereof Is given. This surface polishing can improve the adhesion between the joint plate and the joint plate when the joint plate or bracket is fixed using bolts or rivets at the end or middle part of the shape steel. The purpose is to stabilize the friction between.

  By the way, in the surface polishing of the above-mentioned shape steel, by using a portable grinding device called a disc sander, the end surface of a relatively small-diameter disk-shaped grindstone mounted so as to be rotationally driven is pressed against it. Was done by hand. In grinding using such a portable grinding device, not only does the removal of oxide film and burrs in processed holes in the connection part of the shape steel appear, but workability cannot be obtained.

  On the other hand, as shown in Patent Document 1, the holding member fixed to the shaft end of the rotation shaft and the support member are supported concentrically with each other, and the rotation shaft rotates through the holding member. A plurality of segmented grindstones are fixed concentrically to the outer and inner rings, respectively, while the outer and inner rings are respectively connected to the holding member. It is displaceable in the approaching and separating directions and is urged by the elastic body in the direction separating from the holding member, and the inner ring can be independently displaced in the direction approaching the holding member. Thus, there has been proposed a shape steel surface polishing apparatus that is configured such that the distance from the holding member is regulated according to the position of the outer ring by contacting the outer ring in the direction of separation.According to this, even if waviness is present on the surface of the connecting portion of the shape steel, it can be displaced following it appropriately, and the surface of the connecting portion can be ground substantially uniformly. Further, since the inner ring does not protrude more than the outer ring, it is suitably prevented that the grindstone fixed to the inner ring deeply cuts the peripheral edge of the through hole.

JP-A-10-006227

  By the way, in the shaped steel surface polishing apparatus as described in Patent Document 1, a headed guide bolt loosely fitted in the mounting hole of the holding member is attached to the holding member fixed to the shaft end portion of the rotating shaft. An outer ring that is freely mounted to move in the axial direction within a predetermined range via the headed guide bolt, and can be displaced independently in the direction of approaching the holding member on the inner side, and in the direction of separation Is fixed to the lower surface of the inner ring that moves together with the outer ring by contact with the outer ring, and the inner ring and the outer ring are urged away from the holding member by the elastic body. Has been. For this reason, at the time of polishing the surface of the shape steel, the pressing force from the rotating shaft or the holding member is transmitted to the grindstone through the elastic body, and the outer ring and the inner ring are connected to the headed guide bolt and the holding member. Inclination is allowed within the range of play with the mounting hole, and grinding is performed following the waviness shape of the surface of the connecting portion of the shaped steel.

  Therefore, even if the pressing load from the rotating shaft or the holding member fixed to the rotating shaft or the holding member fixed to the shape steel is increased so as to strongly press the grindstone fixed to the inner ring and the lower surface of the outer ring, The pressing force could not be sufficiently increased by elastic deformation, and the polishing efficiency could not be sufficiently obtained. On the other hand, if the preload of the elastic body is increased in order to strongly press the grindstone fixed to the lower surface of the inner ring and the outer ring against the shape steel, the inner ring and the outer ring of the holding member Since the inclination becomes insufficient, the polishing following the undulation of the surface of the connecting portion of the shaped steel cannot be performed sufficiently, that is, uniformly. That is, it is difficult to achieve both improvement in polishing efficiency and uniform polishing following the waviness shape of the surface of the connecting portion of the shaped steel.

  The present invention has been made in the background of the above circumstances, and the object of the present invention is high grinding efficiency and undulation formed on the surface of the connection part of the shape steel when grinding the connection part of the shape steel. It is an object of the present invention to provide a shape steel grinding apparatus capable of simultaneously obtaining the following uniform polishing.

  The gist of the invention according to claim 1 for achieving the above object is a shape steel surface polishing apparatus for polishing the surface of a shape steel using a polishing tool, the polishing tool comprising: ) A fixed member fixed to the shaft end of the rotational shaft that is driven to rotate, and (b) centered on a swing center provided on the rotational center of the fixed member on the opposite side of the fixed member to the rotational shaft. A disc-like swinging member attached so as to be swingable and relatively non-rotatable, and (c) an outer peripheral grindstone fixed to the outer peripheral portion of the swinging member opposite to the fixing member, and (d) And an urging member that urges the swinging member to approach the fixed member.

  According to the shape steel surface polishing apparatus of the invention according to claim 1, in the polishing tool, on the rotation center of the fixed member on the side opposite to the rotation shaft of the fixed member fixed to the shaft end of the rotation shaft. A disc-shaped swinging member is attached so as to be swingable around the provided swinging center and not relatively rotatable, and the swinging member is biased by the biasing member so as to approach the fixed member side. Then, polishing is performed in a state where the outer peripheral grindstone fixed to the outer peripheral portion of the swinging member opposite to the fixed member is pressed against the shape steel. Since the elastic member is not interposed between the swing member and the fixed member, the pressing force from the rotating shaft is transmitted to the swing member as it is, and the outer peripheral grindstone fixed to the swing member becomes the shape steel. Since it is pressed, high polishing efficiency can be obtained. At the same time, the oscillating member oscillates according to the undulation of the surface of the section steel, so that suitable polishing following the undulation can be obtained.

  Preferably, (e) a protrusion protruding from one axial position of the fixed member and the swinging member, and (f) one axial position of the fixing member and the swinging member. A recess for receiving the protrusion, and (g) a shaft-like member erected on the outer peripheral portion of the swinging member so as to pass through a through hole formed in the outer peripheral portion of the fixing member with a predetermined gap. (H) The biasing member is an outer coil spring interposed between the large-diameter head of the shaft-shaped member and the fixing member on the outer periphery of the shaft-shaped member. In this way, the pressing force is directly transmitted between the protrusion protruding from one axial position of the fixed member and the swinging member and the recess formed at the other axial position and receiving it. Since the swinging member is allowed to swing, the pressing force from the rotating shaft is transmitted to the swinging member as it is and the outer peripheral grindstone fixed to the swinging member is pressed against the shape steel, so that high polishing efficiency can be obtained. At the same time, the oscillating member oscillates in accordance with the undulation of the surface of the section steel, so that suitable polishing following the undulation can be obtained. Further, since the urging member is an outer coil spring interposed between the large-diameter head of the shaft-shaped member and the fixing member on the outer periphery of the shaft-shaped member, a space for the outer coil spring is provided. Is almost unnecessary, and the apparatus becomes small.

  Preferably, (i) a hemispherical convex surface having a center of curvature located at the swing center is formed at a tip of the protrusion, and the concave portion has a hemispherical convex surface in a surface contact state. A hemispherical concave surface in sliding contact is formed. In this way, since the swinging member is allowed to swing in a surface contact state, high durability can be obtained even when a high pressing force is applied for high-efficiency polishing.

  Preferably, (j) the urging member urges the oscillating member so that the axis of the oscillating member is in a neutral posture that coincides with the axis of the fixed member. In this way, since the axis of the swinging member is made to coincide with the fixed member, the polishing starts smoothly when pressed against the surface of the shape steel from the idling state.

  Preferably, (k) an inner annular member having a smaller diameter than the outer diameter of the swing member provided to the swing member so as to be movable within a predetermined range in the axial direction of the swing member; ) An inner peripheral grindstone fixed to the opposite side of the fixing member of the inner annular member; and (m) a second urging member that urges the inner annular member in a direction away from the fixing member. (N) The moving stroke of the inner ring annular member is set so that the grinding surface of the inner peripheral grindstone can move to the fixed member side from the same position as the grinding surface of the outer peripheral grindstone. In this way, since the polishing is performed by the inner peripheral whetstone in addition to the outer peripheral whetstone, further polishing efficiency can be obtained. Also, since the inner peripheral grinding stone does not protrude more than the outer peripheral grinding stone, it is prevented that the inner peripheral grinding stone falls into the through hole of the shape steel and bites, and the opening edge of the through hole is preferably prevented from being cut into a mortar shape. Is done.

  Preferably, (o) in a state in which the outer peripheral grindstone is in contact with the shape steel, the closed space surrounded by the outer peripheral grindstone, the shape steel, and the swing member is communicated to the outside. A communicating hole in a direction having a radial component is formed in the swing member. In this way, the air in the closed space surrounded by the outer peripheral grinding stone, the shape steel, and the rocking member can be discharged to the outside by the centrifugal force generated with the rotation of the fixing member and the rocking member. Waste discharge and cooling are suitably performed.

  Preferably, (p) a movable frame provided with the rotating shaft and an electric motor that rotationally drives the rotating shaft, and (q) a guide device that guides the movable frame in the axial direction of the rotating shaft; (R) a fluid pressure cylinder that drives the movable frame in the axial direction of the rotating shaft, and (s) adjusting the fluid pressure supplied to the fluid pressure cylinder to adjust the shape of the polishing tool. A polishing pressing force for steel is set. In this way, the polishing pressing force, that is, the pressure-bonding force of the polishing tool against the shaped steel can be continuously and remotely adjusted according to the condition of the surface to be polished.

It is a perspective view which shows the whole structure of the shaped steel surface grinding | polishing apparatus of one Example of this invention. It is sectional drawing explaining the principal part of the shaped steel surface grinding | polishing apparatus of FIG. It is the figure which looked at the principal part of the shape steel surface grinding | polishing apparatus of FIG. 2 from the axial direction. It is sectional drawing explaining the principal part of the shaped steel surface grinding | polishing apparatus of the other Example of this invention, Comprising: It is a figure corresponded in FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a shaped steel surface polishing apparatus 10 according to an embodiment of the present invention. This shape steel surface polishing apparatus 10 has a seam plate (connecting plate) and a bracket at the end or intermediate part of the long H-shaped steel 12 that is intermittently conveyed in the direction of the arrow by a conveying device (not shown) such as a roller conveyor. In the fixed connection portion, surface polishing is performed for the purpose of improving the adhesion between the joint plate and the bracket or stabilizing the friction with the joint plate. A plurality of through holes 14 for inserting bolts or rivets are formed in the connecting portion of the H-shaped steel 12 in accordance with a predetermined arrangement pattern.

  The pair of lateral movement rails 16 are supported by the lateral frame 18 so as to be in a direction perpendicular to the transport direction of the transport device above the transport device. The moving frame 20 includes a slide member 22 that is slid on the lateral movement rail 16, and is arranged so as to be movable along the lateral movement rail 16. The moving frame 20 includes a bracket 24 connected to one end of a lateral drive hydraulic cylinder (not shown) that performs lateral positioning.

  The moving frame 20 is provided with a polishing tool 26 at its tip, and a rotational drive device 28 that rotationally drives the polishing tool 26 is supported to be movable in the vertical direction. The rotary drive device 28 includes a drive motor 30 and an upper and lower frame 34 that rotatably supports a rotary shaft 32 to which the drive motor 30 is fixed and rotationally driven by the drive motor 30. ing. A vertical rail 36 is fixed to the upper and lower frame 34, and a bracket 40 to which a pair of guide devices 38 for guiding the vertical rail 36 is fixed is provided on the moving frame 20. A vertical drive hydraulic cylinder 42 is provided between the moving frame 20 and the upper and lower frames 34 so that the upper and lower frames 34 are guided in the vertical direction and positioned at a predetermined height position. ing. That is, the upper and lower frames 34 that are movable frames are guided by the guide device 38 so as to be movable in the direction of the rotation axis of the rotation shaft 32.

  Thereby, the horizontal driving hydraulic cylinder and the vertical driving hydraulic cylinder 42 are driven to control the position of the polishing tool 26 with respect to the H-section steel 12 conveyed to a predetermined position by the conveying device. However, the surface of the connecting portion of the H-shaped steel 12 is uniformly polished by the polishing tool 26 with a predetermined cutting allowance by being repeatedly performed every time the H-shaped steel 12 is positioned. A pressure regulating valve (not shown) is provided in order to control the hydraulic pressure supplied to the vertical drive hydraulic cylinder 42, and the output pressure of the pressure regulating valve is controlled by an electronic control device (not shown) or manual operation. A polishing pressing force, that is, a pressing force against the H-shaped steel 12 by the tool 26 is set. The vertical drive hydraulic cylinder 42 is controlled by hydraulic pressure, but may be a fluid pressure cylinder controlled by fluid pressure such as water pressure or pneumatic pressure.

  The polishing tool 26 is configured, for example, as shown in the cross section of FIG. That is, the polishing tool 26 includes a disk-shaped fixing member 50 that is fixed concentrically to the shaft end of the rotating shaft 32 by screwing, and the fixing member 50 has an opposite side to the rotating shaft 32 of the fixing member 50. On the rotation axis C of the rotation shaft 32, it is swingable about a swing center point P provided at a position slightly separated from the fixed member 50 on the opposite side to the rotation shaft 32, and is not relatively rotatable. The attached disc-shaped swinging member 52, the outer peripheral grindstone 54 fixed to the outer peripheral portion of the swinging member 52 opposite to the fixing member 50, and the swinging member 52 approaching the fixing member 50 side. And an outer coil spring 56 which is an urging member for urging the spring.

  A protrusion 58 concentric with the rotation axis C protruding from the center of the fixing member 50 opposite to the rotation shaft 32 is fixed by screwing. Further, a recess 60 for receiving the protrusion 58 is formed at the central portion of the swinging member 52 on the rotating shaft 32 side, that is, at the axial center position. A hemispherical convex surface 62 with the center of curvature P as the center of curvature is formed at the tip of the protrusion 58, and a hemispherical concave surface with the center of curvature as the center of curvature P is formed in the recess 60. 64 is formed, and the hemispherical convex surface 62 and the hemispherical concave surface 64 are brought into sliding contact in a surface contact state. As a result, the swing member 52 can swing around the swing center point P within a predetermined angle range until it comes into contact with the fixed member 50.

  A plurality of (six in this embodiment) shaft-like members 66 are erected toward the fixing member 50 on the outer peripheral portion of the shaft-like member 52, and the outer peripheral portion of the fixing member 50 is A plurality of through holes 68 are formed through the shaft members 66 with a predetermined gap, and between the large diameter head portion 66a of the shaft members 66 and the surface of the fixed member 50 on the rotating shaft 32 side. A plurality of outer coil springs 56 that are wound concentrically with the shaft-shaped member 66 are inserted on the outer periphery of the shaft-shaped member 66. Since the shaft-like members 66 are arranged at equal intervals in the circumferential direction, as shown in FIG. 2, the shaft-like members 66 are swung as shown in FIG. 2 by the same urging force provided by the outer coil springs 56 respectively provided on the shaft-like members 66. The swinging member 52 is biased so that the axial center of the member 52 is in a neutral posture that coincides with the axial center of the fixed member 50.

  As shown in detail in FIG. 3 showing the lower surface of the polishing tool 26, a circular grindstone 54 connected in the circumferential direction is fixed to the outer peripheral portion of the surface of the swinging member 52 opposite to the rotating shaft 32. An annular outer periphery base metal 70 is fixed by screws 74. In addition, a plurality of radial communication holes 76 in the direction having a radial component, that is, radial in this embodiment, are formed between the surface of the swinging member 52 opposite to the rotating shaft 32 and the outer peripheral base metal 70. Has been. The communication hole 76 communicates the space surrounded by the outer peripheral grindstone 54, the H-section steel 12, and the swing member 52 to the outside in a state where the outer peripheral grindstone 54 is in contact with the H-section steel 12. It has a function of positively discharging air and chips from the inner peripheral side to the outer peripheral side by a pump action by centrifugal force. The outer peripheral grindstone 54 is composed of a plurality of segment grindstones arranged in a circumferential direction at a predetermined interval.

  The hemispherical convex surface 62 is provided with a lubricant containing groove 78 for containing a lubricant such as grease, molybdenum disulfide, and carbon in a concentric circle centered on the axis C, and is in surface contact with each other. The lubricity between the sliding hemispherical convex surface 62 and the hemispherical concave surface 64 is enhanced, and the swinging operation of the swinging member 52 is maintained for a long time. In addition, between the fixed member 50 and the swinging member 52, an annular seal that seals the periphery between the hemispherical convex surface 62 and the hemispherical concave surface 64 regardless of the swinging of the swinging member 52 due to elastic deformation. An elastic seal member 80 is provided.

  In addition, an annular groove 82 is formed in the fixing member 50 outside the elastic seal member 80, and an annular protrusion 84 that is received in the annular groove 82 is formed in the swing member 52. The hemispherical convex surface A labyrinth seal is provided between 62 and the hemispherical concave surface 64 to protect the annular elastic seal member 80.

  According to the shaped steel surface polishing apparatus 10 of the present embodiment configured as described above, in the polishing tool 26, the fixing member 50 fixed to the shaft end of the rotating shaft 32 is opposite to the rotating shaft 32. A disk-shaped swinging member 52 is attached so as to be swingable about a swinging center point P provided on the rotation center C of the fixing member 50 and not relatively rotatable, and the swinging member 52 is fixed to the fixing member 50. An outer peripheral grindstone 54 that is biased by an outer coil spring (biasing member) 56 so as to approach the side and fixed to the outer peripheral portion of the swinging member 52 opposite to the fixing member 50 is an H-section steel. Polishing is performed by being driven to rotate while being pressed against the member 12. Since no elastic member is interposed between the swing member 52 and the fixed member 50, the pressing force from the rotating shaft 32 is transmitted to the swing member 52 as it is and the outer periphery fixed to the swing member 52. Since the grindstone 54 is pressed against the H-section steel 12, high polishing efficiency can be obtained. At the same time, the swinging member 52 swings according to the undulation of the surface of the H-section steel 12, so that suitable polishing following the undulation is obtained.

  Further, according to the polishing tool 26 of the present embodiment, the protrusion 58 protruding from the position of the rotation axis C of the fixing member 50 and the recess formed at the position of the axis of the swinging member 52 to receive the protrusion 58. 60 and a shaft-like member 66 erected on the outer peripheral portion of the swinging member 52 so as to pass through a through hole 68 formed in the outer peripheral portion of the fixing member 50 with a predetermined gap, and an outer coil spring ( The urging member 56 is wound around the outer periphery of the shaft-like member 66 in a coil shape concentric with the shaft-like member 66 interposed between the large-diameter head 66a of the shaft-like member 66 and the fixing member 50. It is a rotated spring. For this reason, it swings while directly transmitting the pressing force between the protrusion 58 protruding from the axial center C position of the fixing member 50 and the recess 60 formed at the axial center position of the swinging member 52 and receiving it. Since the swinging of the member 52 is allowed, the pressing force from the rotating shaft 32 is transmitted to the swinging member 52 as it is, and the outer peripheral grindstone 54 fixed to the swinging member 52 is pressed against the H-section steel 12. At the same time as high polishing efficiency is obtained, the rocking member 52 rocks in accordance with the undulations on the surface of the shape steel, so that suitable polishing following the undulations can be obtained. The outer coil spring 56 is a coiled spring concentric with the shaft-shaped member 66 and interposed between the large-diameter head 66 a of the shaft-shaped member 66 and the fixing member 50 on the outer periphery of the shaft-shaped member 66. Therefore, the space for the urging member (outer coil spring 56) is almost unnecessary, and the apparatus is downsized.

  In addition, according to the polishing tool 26 of the present embodiment, a hemispherical convex surface 62 whose curvature center point P is located on the axis C of the fixing member 50 is formed at the tip of the protrusion 58. Since the hemispherical concave surface 64 that is in sliding contact with the hemispherical convex surface 62 in the surface contact state is formed, the swinging member 52 is allowed to swing in the surface contact state, which is high for high-efficiency polishing. Even when a pressing force is applied, high durability is obtained.

  Further, according to the polishing tool 26 of the present embodiment, the outer coil spring (biasing member) 56 is swung so that the shaft center of the swinging member 52 is in a neutral posture that coincides with the shaft center C of the fixed member 50. Since the moving member 52 is urged, the shaft center of the swinging member 52 is aligned with the fixed member 50 as shown in FIG. 2, and therefore when pressed against the surface of the H-section steel 12 from the idled state. Polishing starts smoothly.

  Further, according to the polishing tool 26 of the present embodiment, the space surrounded by the outer peripheral grindstone 54, the H-section steel 12, and the rocking member 52 in a state where the outer peripheral grindstone 54 is in contact with the H-section steel 12. Since a communicating hole 76 having a radial component for communicating with the outside is formed in the swing member 52, the pump is based on the centrifugal force generated with the rotation of the fixed member 50 and the swing member 52. Since the air in the space surrounded by the outer peripheral grindstone 54, the H-shaped steel 12 and the rocking member 52 can be discharged to the outside by the action, there is an advantage that chips are discharged and cooled suitably.

  Further, according to the polishing tool 26 of the present embodiment, the lubricant containing concave groove 78 for containing the lubricant is provided in the hemispherical convex surface 62, and the space between the hemispherical convex surface 62 and the hemispherical concave surface 64 is viewed from the outer peripheral side. An annular elastic sealing member 80 for protection is provided outside the fixing member 50 and the swinging member 52, and an annular groove 82 formed in the fixing member 50 and the swinging member 52 outside the elastic sealing member 80 and Since the labyrinth seal composed of the annular projection 84 received therein is provided, the sliding between the hemispherical convex surface 62 and the hemispherical concave surface 64, that is, the swinging operation of the swinging member 52 is protected for a long period of time. There are advantages.

  Next, another embodiment of the present invention will be described. In the following description, parts common to the embodiments are denoted by the same reference numerals and description thereof is omitted.

  A polishing tool 90 shown in FIG. 4 is provided on the swing member 52 so as to be movable within a predetermined range in the axial direction of the swing member 52 as compared with the polishing tool 26. The inner annular member 92 having a diameter smaller than the diameter and smaller than the inner diameter of the outer peripheral grindstone 54 or the outer peripheral base metal 70 and the swinging member 52 can be moved relative to the opposite side of the inner annular member 92 from the fixing member 50. The inner peripheral base metal 96 having a diameter smaller than the inner diameter of the outer peripheral grinding stone 54 or the outer peripheral base metal 70 and fixed to the opposite side of the fixing member 50 of the inner peripheral base metal 96 by the screw 95 through the connecting member 94 passing therethrough. The inner peripheral grindstone 98 and a plurality of inner coil springs (second biasing members) 100 that bias the inner annular member 92 in a direction away from the fixed member 50 are further included. The surface is the grinding surface of the peripheral grinding wheel 54 The movement stroke (movement stroke) in the axial direction of the inner annular member 92 is set so that the inner annular member 92 can be moved from the same position to the fixed member 50 side.

  The urging forces of the plurality of inner coil springs 100 are set smaller than the urging forces of the plurality of outer coil springs 56, and the hemispherical convex surface 62 and the hemispherical concave surface 64 that slide in surface contact with each other. The separation is prevented.

  The inner annular member 92 is disposed between the fixed member 50 and the swinging member 52, and the inner coil spring (second urging member) 100 is interposed between the inner annular member 92 and the fixed member 50. The inner annular member 92 is in contact with the swing member 52. By this contact, the grinding surface of the inner peripheral grinding wheel 98 fixed to the lower surface of the inner peripheral base metal 96 fixed to the inner annular member 92 via the connecting member 94 becomes flush with the grinding surface of the outer peripheral grinding stone 54. That is, the lower end position of the moving stroke is determined by the contact. The grinding surface of the inner peripheral grinding wheel 98 does not protrude toward the H-section steel 12 side than the grinding surface of the outer peripheral grinding stone 54, and movement in the retracting direction is allowed from the grinding surface of the outer peripheral grinding stone 54. The inner peripheral grindstone 98 is composed of a plurality of segment grindstones arranged in a row in the circumferential direction like the outer peripheral grindstone 54.

  According to the polishing tool 90 of the present embodiment, polishing is performed by the inner peripheral grindstone 98 in addition to the outer peripheral grindstone 54, so that polishing with higher efficiency can be obtained. At the same time, the inner peripheral grindstone 98 does not protrude from the outer peripheral grindstone 54 during the polishing process, so that the inner peripheral grindstone 98 is prevented from falling into the through hole 14 of the H-shaped steel 12 and opening of the through hole 14. It is suitably prevented that the edge is cut into a mortar shape.

  The preferred embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, and may be implemented in other modes.

  For example, in the above-described embodiment, the protrusion 58 protrudes from the fixing member 50, and the recess 60 that receives the protrusion 58 is formed in the swing member 52. On the contrary, the protrusion 58 does not swing. A recess 60 that protrudes from the moving member 52 and receives the protrusion 58 may be formed in the fixing member 50.

  Further, the communication hole 76 shown in FIG. 3 may be formed on the swing member 52 side of the outer peripheral base metal 70, or on the swing member 52 of the embodiment of FIG. 4 or the outer peripheral base metal 70 fixed thereto. It may be formed. Further, the communication hole 76 only needs to have a radial component, and may be formed obliquely with respect to the radial direction.

  In addition, the outer peripheral grindstone 54 and the inner peripheral grindstone 98 of the above-described embodiment are composed of a plurality of segment grindstones arranged in a row at a predetermined interval in the circumferential direction, but are closely arranged in the circumferential direction. The segment grindstone may be formed, or may be formed from an integral grindstone formed in an annular shape.

  Further, in the above-described embodiment, the lubricant containing concave groove 78 for containing the lubricant is provided concentrically around the axis C on the hemispherical convex surface 62 at the tip of the protrusion 58. The groove shape may be other shapes, and the lubricant containing groove 78 may be provided on the hemispherical concave surface 64 side.

  In the above-described embodiment, the polishing of the H-shaped steel 12 has been described. However, other types of shaped steel, for example, a shaped steel having a cross section such as an L-shape or an I-shape may be used.

  Although not exemplified one by one, the present invention is implemented with various modifications within the scope not departing from the gist thereof.

10: Shaped steel surface polishing device 12: H-shaped steel (shaped steel)
26, 90: Polishing tool 32: Rotating shaft 42: Vertical drive hydraulic cylinder (fluid pressure cylinder)
50: Fixed member 52: Oscillating member 54: Outer peripheral grindstone 56: Outer coil spring (biasing member)
58: Projection 60: Recess 62: Hemispherical convex surface 64: Hemispherical concave surface 66: Shaft-shaped member 66a: Large-diameter head 68: Through hole 70: Outer peripheral metal 74: Screw 76: Communication hole 92: Inner annular member 98 : Inner peripheral grinding wheel 100: Inner coil spring (second biasing member)

Claims (7)

A shape steel surface polishing apparatus for polishing a surface of a shape steel using a polishing tool, the polishing tool comprising:
A fixing member fixed to the shaft end of the rotary shaft that is driven to rotate;
A disc-like swinging member mounted on the opposite side of the rotation axis of the fixing member on the center of rotation of the fixing member and swingable around the center of rotation and not relatively rotatable;
An outer peripheral grindstone fixed to the outer peripheral portion of the swinging member opposite to the fixed member;
And a biasing member that biases the swing member so as to approach the fixed member. A protrusion protruding from one axial position of the fixing member and the swinging member;
A recessed portion that is formed at one axial position of the fixing member and the swinging member and receives the protruding portion;
A shaft-like member erected on the outer peripheral portion of the swinging member so as to pass through a through hole formed in the outer peripheral portion of the fixing member with a predetermined gap,
The shape steel according to claim 1, wherein the urging member is an outer coil spring interposed between the large-diameter head of the shaft-shaped member and the fixing member on the outer periphery of the shaft-shaped member. Surface polishing equipment. A hemispherical convex surface in which the center of curvature is located at the oscillation center is formed at the tip of the protrusion,
The shape steel surface polishing apparatus according to claim 2, wherein a hemispherical concave surface that is in sliding contact with the hemispherical convex surface in a surface contact state is formed in the concave portion.   The urging member urges the oscillating member so that the axis of the oscillating member is in a neutral posture that coincides with the axis of the fixed member. 1. Shaped steel surface polishing apparatus. An inner annular member having a smaller diameter than the outer diameter of the swinging member, provided on the swinging member so as to be movable within a predetermined range in the axial direction of the swinging member;
An inner grindstone fixed to the opposite side of the inner annular member to the fixing member;
A second urging member that urges the inner annular member in a direction away from the fixing member,
The movement stroke of the inner annular member is set so that the grinding surface of the inner peripheral grindstone can be moved from the same position as the grinding surface of the outer peripheral grindstone to the fixed member side. The shape steel surface polishing apparatus according to any one of 4. A communication hole in a direction having a radial component for communicating a closed space surrounded by the outer peripheral grinding wheel, the structural steel, and the swing member with the outer peripheral grinding stone in contact with the structural steel. The shape steel surface polishing apparatus according to claim 1, wherein the rocking member is formed on the rocking member. A movable frame provided with the rotating shaft and an electric motor that rotationally drives the rotating shaft;
A guide device for guiding the movable frame in the axial direction of the rotating shaft;
A fluid pressure cylinder for driving the movable frame in the axial direction of the rotating shaft,
The structural steel surface polishing apparatus according to any one of claims 1 to 6, wherein a polishing pressing force with respect to the structural steel of the polishing tool is set by adjusting a fluid pressure supplied to the fluid pressure cylinder. .

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