Support mechanism

Abstract

To provide a support mechanism which can grind an end surface of a flange of a steel material with a simple structure using a grinder.SOLUTION: A support mechanism 1 is used to support a grinder 100 used to grind an end surface of a steel material in a movable manner and includes: a support member 30 having a base part 31 and a pair of wall parts 41, 42 each of which is erected from the base part 31 and formed with a recessed part C extending in a vertical direction; a dolly 10 which supports the support member 30 in a manner that the support member 30 can move relative to the steel material; and a connection member 50 which connects the grinder 100 to the support member 30 through the recessed parts C in a swingable state.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a support mechanism, and more particularly to a support mechanism for a grinder that supports a grinder that grinds the end face of a flange of an H-shaped steel beam. [Background technology]

[0002] Conventionally, grinding machines equipped with grinding wheels have been used to adjust the dimensions of horizontally extending steel materials, etc. Grinding work is sometimes performed manually, for example, by operating the handle of the grinding machine, but manual work can result in uneven work results, so various improvements have been attempted.

[0003] For example, Patent Document 1 discloses a surface grinding device for H-shaped steel, which is characterized by comprising a conveyor for horizontally loading and unloading an H-shaped steel in a vertically placed state, a lifting guide section erected at a position to the side of the conveyor between the loading side and the unloading side of the conveyor, a lifting body that can be raised and lowered along the lifting guide section, a grinding wheel for surface grinding from both sides of the web of the H-shaped steel to the inner and outer flange surfaces, a grinding head that rotatably supports the grinding wheel, a swinging means for rotating the grinding head horizontally and up and down, and a motor for rotating the grinding wheel, and a grinding unit arranged so as to be slidable horizontally toward the H-shaped steel relative to the lifting body. The device uses a pair of left and right grinding wheels to automatically grind the inner and outer surfaces of the upper flange, both sides of the web, and the inner and outer surfaces of the lower flange in succession while the H-shaped steel is placed vertically. Since there is no need to turn the H-shaped steel over, the safety of the work can be ensured, and since the H-shaped steel is ground while it is placed vertically, the lateral dimensions of the device can be made compact, making it easy to install even in a small factory.

[0004] Patent Document 2 discloses a rail grinding device that includes a vehicle body that can move along the rail, an abrasive that grinds the side surface of the rail head, and a rotary drive source that rotates the abrasive, the abrasive surface of the abrasive that grinds the side surface of the rail head being supported so as to be swingable about the rotation axis of the abrasive. This rail grinding device allows the abrasive surface of the abrasive to come into contact with the curvature and deformation of the side surface of the rail head, enabling good grinding.

[0005] Furthermore, Patent Document 3 discloses a grinding device that includes a running body that can move longitudinally along the crest side of an angle iron material, and a main body that is connected to the running body and grinds the first and second crest side, the running body includes magnet wheels that are attracted to the first and second crest side, respectively, and is configured to be movable longitudinally along the crest side of the angle iron material by rolling the magnet wheels, and the main body includes a support frame that is connected to the running body, at least a pair of rotating grinding brushes supported by the support frame so as to contact the first and second crest side, respectively, a drive unit supported by the support frame, and a transmission mechanism supported by the support frame so as to transmit the rotation of the drive unit to the rotating grinding brushes. With this grinding device, the magnet wheels are attracted to the two crest side of the angle iron material, and the brushes are pressed against the two crest side while moving in the longitudinal direction of the angle iron material, thereby efficiently grinding the two crest side surfaces simultaneously. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2002-254279 A [Patent Document 2] JP 2018-204225 A [Patent Document 3] JP 2020-138242 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, the H-beam surface grinding device described in Patent Document 1 above has a complex structure because it requires a control system such as a motor to position the grinding wheel head. The grinding device described in Patent Document 2 above is mainly intended to grind the side surface of the rail head with an abrasive. Furthermore, the grinding device described in Patent Document 3 above is mainly intended to grind the crest side surface of angle steel.

[0008] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a support mechanism that can grind the end face of a flange of a steel material using a grinding device such as a grinder with a simple configuration. [Means for solving the problem]

[0009] The present invention relates to a support mechanism for movably supporting a grinder used to grind an end face of a steel material, the support mechanism comprising a support member having a base portion and a pair of wall portions rising from the base portion and having a recess extending in the up-down direction, a carriage supporting the support member movably relative to the steel material, and a connecting member connecting the grinder to the support member via the recess in a freely swingable state. the connecting member is in a state in which it can swing freely with respect to the support member, the connecting member has an extension portion extending in a moving direction of the grinder, the extension portion is provided with a plurality of pairs of support shafts protruding in a direction substantially perpendicular to the moving direction of the grinder, and one of the pair of support shafts is inserted into the recess. It is characterized by:

[0011] In the support mechanism according to the present invention, the support member may be provided with a spacer capable of changing the height of the pair of support shafts.

[0012] In the support mechanism of the present invention, a first roller may be disposed on the cart, the first roller being in contact with an end face of the steel material and rotating about a rotation axis extending horizontally perpendicular to the movement direction of the grinder.

[0013] In the support mechanism according to the present invention, a second roller may be further disposed in contact with a side surface of the steel material and rotated about a rotation axis extending in the vertical direction. Effect of the Invention

[0014] As described above, according to the present invention, it is possible to provide a support mechanism capable of grinding the end face of a flange of a steel material with a simple configuration using a grinding device such as a grinder. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a schematic perspective view of a support mechanism according to the embodiment of the present invention. [Diagram 2] FIG. 2(a) is a schematic front view of the cart according to the embodiment, FIG. 2(b) is a schematic side view of the cart according to the embodiment, and FIG. 2(c) is a schematic rear view of the cart according to the embodiment. [Diagram 3] FIG. 3(a) is a schematic front view of the support member according to the embodiment, and FIG. 3(b) is a schematic side view of the support member according to the embodiment. [Figure 4] FIG. 4(a) is a diagram showing the positional relationship between the support member, the protrusion, and the dolly when the support member is tilted, and FIG. 4(b) is a partially enlarged view of FIG. 4(a). [Diagram 5] FIG. 2 is a schematic perspective view of a connecting member according to an embodiment of the present invention. [Figure 6] 1 is a side view showing a state in which the grinder is attached to a support mechanism according to an embodiment of the present invention. FIG. [Figure 7] FIG. 7(a) is a diagram showing the state in which the support mechanism is attached to the H-shaped steel, and FIG. 7(b) is a partially enlarged view of FIG. 7(a). [Figure 8] FIG. 8(a) is a diagram showing a rough cutting step, FIG. 8(b) is a diagram showing an adjustment step, and FIG. 8(c) is a diagram showing a finishing step. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. Note that the present embodiment described below does not unduly limit the content of the present invention described in the claims, and all of the configurations described in the present embodiment are not necessarily essential as a means for solving the problem of the present invention.

[0017] 1 is a schematic perspective view of a support mechanism 1 according to an embodiment of the present invention. The support mechanism 1 is used, for example, to grind the end face of a flange of a steel material (H-shaped steel) with a grinder attached. In the following embodiment, the X-axis direction is the front-rear direction, the Y-axis direction is the left-right direction, and the Z-axis direction is the vertical direction (up-down direction).

[0018] As shown in FIG. 1, the support mechanism 1 is configured to include a carriage 10, a support member 30 attached to the carriage, and a connecting member 50 attached to the support member 30.

[0019] 2(a) is a front view of the bogie 10, FIG. 2(b) is a side view of the bogie 10, and FIG. 2(c) is a rear view of the bogie 10. The bogie 10 is configured to have a base 11, a plurality of first rollers 21F, 21R attached to the base 11, and a plurality of second rollers 22A, 22B, 22C, 22D, 22E, 22F, 22G, 22H. The bogie 10 supports the support member 30 so that it can move relative to the H-beam. In the following description, when there is no need to distinguish between the rollers, they will simply be referred to as the first roller 21 or the second roller 22 for the sake of simplicity.

[0020] The base 11 is composed of a first substrate 11a and a second substrate 11b, which are aligned in the left-right direction and connected by, for example, a bolt 23a and a nut 23b. In this embodiment, for convenience of explanation, the member located on the right side is the first substrate 11a, and the member located on the left side is the second substrate 11b. The first substrate 11a and the second substrate 11b may have the same shape or different shapes. The distance between the first substrate 11a and the second substrate 11b can be adjusted by the bolt 23a and the nut 23b.

[0021] A pair of first rollers 21F, 21R are provided on the upper side of the first base material 11a at the front and rear. The first rollers 21F, 21R are configured to rotate around a rotation axis that contacts the end face of the steel material and extends in the left-right direction (horizontal direction perpendicular to the moving direction of the grinder). A pair of second rollers 22A, 22B are provided vertically aligned at the tip of the lower side of the first base material 11a, and a pair of second rollers 22C, 22D are provided vertically aligned at the rear end of the lower side. The second rollers 22A, 22B, 22C, 22D are configured to contact the side face of the steel material and rotate around a rotation axis that extends vertically.

[0022] A pair of second rollers 22E, 22F are provided vertically aligned at the leading end of the lower side of the second base material 11b, and a pair of second rollers 22G, 22H are provided vertically aligned at the trailing end of the lower side. The second rollers 22E, 22F, 22G, 22H are all configured to rotate about a rotation axis extending in the vertical direction.

[0023] In the dolly 10, the distance between the pair of second rollers 22A, 22B and the pair of second rollers 22E, 22F is configured to approximately match the width of the flange. Similarly, the distance between the pair of second rollers 22C, 22D and the pair of second rollers 22G, 22H is configured to approximately match the width of the flange. By adjusting the distance between the first base material 11a and the second base material 11b using the bolts 23a and the nuts 23b, the distance between the second rollers 22 in the left-right direction can be adjusted according to the width of the flange.

[0024] Here, an example has been described in which two second rollers 22 are arranged on the first base material 11a and the second base material 11b, one on the front and one on the back. However, the number of second rollers 22 arranged on the first base material 11a and the second base material 11b may be one on the front and one on the back, or may be three or more. The number of second rollers 22 arranged in the front and the number of second rollers 22 arranged in the rear may be different. By providing the first roller 21 and the second roller 22 on the dolly 10, the support mechanism 1 can be moved smoothly relative to the H-steel. Also, if the dolly 10 can move smoothly relative to the flange of the H-steel, only the first roller 21 may be provided on the dolly 10, and the second roller 22 may not necessarily be provided. Alternatively, if the end face of the steel material has a width wide enough to place the entire dolly 10 on it, wheel-shaped rollers may be provided on the dolly 10, the entire dolly 10 may be placed on the end face, and the dolly 10 may be moved by the wheels of the dolly 10.

[0025] Fig. 3(a) is a front view of the support member 30, and Fig. 3(b) is a side view of the support member 30. The support member 30 is formed in a generally U-shape with an open upper portion, and is composed of a base portion 31 formed in a flat plate shape, and a first wall portion 41 and a second wall portion 42 rising from the base portion 31. The base portion 31 is formed in a generally rectangular shape in a plan view, for example, and is attached to the dolly 10.

[0026] The first wall portion 41 and the second wall portion 42 are both formed in a flat plate shape and are disposed facing each other. That is, as shown in Fig. 3, the first wall portion 41 and the second wall portion 42 are formed symmetrically and disposed at a distance sufficient for disposing a grinder. The base portion 31, the first wall portion 41, and the second wall portion 42 form a space in which the grinder is disposed.

[0027] The first wall portion 41 and the second wall portion 42 have a recess C extending in the up-down direction formed in the center portion in the front-rear direction. The recess C opens upward and is formed with approximately the same width from the opening side to the bottom BP. The depth of the recess C may be set so that a grinding angle P, which will be described later, is appropriate. The recess C formed in the first wall portion 41 and the recess C formed in the second wall portion 42 are formed in the same shape.

[0028] A plurality of notches N are formed on the front side of the first wall portion 41 and the second wall portion 42. Each notch N is open on the front side. The shape of the notches N is not particularly limited, but it is preferable that the notches N are formed obliquely so as to slope downward toward the rear side. The second wall portion 42 is also formed with notches N corresponding to the locations of the notches N formed in the first wall portion 41. The number of notches N formed in the first wall portion 41 and the second wall portion 42 is not particularly limited.

[0029] In addition, a pair of spacers 43 may be provided on the base portion 31 of the support member 30. The spacers 43 may have any structure as long as they are formed to be expandable and contractible in the vertical direction, and may be formed of an elastic member such as a spring. The spacers 43 may be disposed at a position overlapping the recessed portion C in the horizontal direction, and it is desirable that the upper end portion 43a of the spacers 43 is configured so that the height can be changed to any height from the bottom portion BP to the upper end of the first wall portion 41 or the second wall portion 42. In addition, the spacers 43 may be provided at an appropriate position of the support member 30, including inside the recessed portion C.

[0030] FIG. 4(a) is a diagram showing the positional relationship between the support member 30, the protruding portion 12, and the dolly 10 when the support member 30 is tilted, and FIG. 4(b) is a partially enlarged view of FIG. 4(a). The dolly 10 and the support member 30 may be connected via the protruding portion 12. Specifically, the protruding portion 12 is provided on the first base material 11a of the dolly 10, and the support member 30 is disposed on the protruding portion 12. Since the protruding portion 12 is formed in a semi-ring shape that is convex on the upper side, the protruding portion 12 and the support member 30 can swing in the left-right direction relative to the dolly 10. The shape of the protruding portion 12 is not limited to a semi-ring shape, and may be any shape such as a hemisphere or a polygonal shape as long as it can support the support member 30 so as to be swingable in the left-right direction. The protruding portion 12 may also be provided on the support member 30 side.

[0031] Fig. 5 is a schematic perspective view of the connecting member 50. As shown in Fig. 5, the connecting member 50 includes a pair of extending portions 51, 51 extending in the front-rear direction, and a horizontal portion 54 connecting the pair of extending portions 51, 51. The extending portion 51 includes an attachment portion 52 and a linear portion 53 extending linearly from the front to the rear. The connecting member 50 is used to connect the grinder to the support member 30, and is desirably made of, for example, a metal so as to be able to withstand the weight of the grinder.

[0032] A mounting hole 52a is formed in the mounting portion 52, and a handle that is operated by an operator to operate the grinder is attached to this mounting hole 52a. The method of attaching the handle to the mounting hole 52a is not particularly limited, but may be, for example, a connection using a screw or a bolt.

[0033] The straight portion 53 is a pair of left and right straight members located on the rear side of the mounting portion 52 and extending in the front-rear direction. A pair of left and right first support shafts 61, a pair of second support shafts 62, and a pair of third support shafts 63 are provided in this order on the straight portion 53 from the mounting portion 52 side to the horizontal portion 54 side. The first support shafts 61, the second support shafts 62, and the third support shafts 63 all protrude outward in the left-right direction from the straight portion 53. The first support shafts 61, the second support shafts 62, and the third support shafts 63 may be formed by integral molding with the connecting member 50, or may be configured as separate members. In the following description, when the support shafts are not to be distinguished from one another, they will be simply referred to as support shafts 60 for the sake of simplicity.

[0034] 6 is a side view of the grinder 100 attached to the support mechanism 1. As described below, the grinder 100 is attached to the support member 30 via a connecting member 50 in order to grind the H-shaped steel. Since the support member 30 is fixed to the carriage 10, the grinder 100 also moves as the carriage 10 moves.

[0035] The grinder 100 has a longitudinal body 101 and a grinding unit 102 provided on the front side of the body 101. The grinding unit 102 is, for example, a grindstone formed in a disk shape. A cord 103 connected to a battery (not shown) is provided on the rear side of the body 101. A handle 104 is provided on the front side of the body 101 via a mounting hole 52a.

[0036] The grinder 100 is attached to the support member 30 by inserting any one of the first support shaft 61, the second support shaft 62, or the third support shaft 63 into the recess C. Fig. 6 shows the state in which the second support shaft 62 is inserted into the recess C and placed on the bottom BP. By inserting the support shaft 60 into the recess C, movement of the grinder 100 relative to the support mechanism 1 in a horizontal state is restricted. When grinding the end face of the H-beam, the grinder 100 is moved back and forth by the operator while attached and fixed to the support member 30.

[0037] Any one of the first support shaft 61, the second support shaft 62, or the third support shaft 63 is inserted into the recess C. The three angles of the grinder 100 relative to the H-beam are determined in advance, and any one of the first support shaft 61, the second support shaft 62, or the third support shaft 63 is inserted into the recess C depending on the required angle.

[0038] The first support shaft 61, the second support shaft 62, and the third support shaft 63 are all detachable from the recessed portion C. Because the support shaft 60 is detachable from the recessed portion C, the grinder 100 integrated with the connecting member 50 can be easily attached and detached from the support member 30. In other words, the state of the grinder 100 can be changed from a state in which the second support shaft 62 is inserted in the recessed portion C to a state in which the first support shaft 61 or the third support shaft 63 is inserted in the recessed portion C. This makes it possible to easily change the angle of the grinder 100 with respect to the H-beam.

[0039] By using the spacer 43, the height of the grinder 100 can be changed by changing the height of the support shaft 60 inserted into the recess C. That is, the angle of the grinder 100 with respect to the H-beam can be changed without attaching or detaching the support shaft 60 to or from the recess C. Also, by tilting the support member 30 with respect to the carriage 10, the grinder 100 can be tilted in either the left or right direction. This makes it possible to remove burrs that occur during the grinding operation.

[0040] In consideration of operational safety, the grinder 100 may be fixed to the connecting member 50 by a holder 105. In addition, when the grinder 100 is not in operation, it is desirable to lift the front side of the grinder 100 so that the grinding part 102 does not come into contact with and damage the H-beam. For this purpose, for example, as shown in Fig. 6, a pipe member 106 may be hung horizontally across any pair of notches N to support the weight of the grinder 100.

[0041] Fig. 7(a) is a diagram showing a state in which the support mechanism 1 is attached to the H-beam steel 200, as viewed from the front-rear direction. Fig. 7(b) is an enlarged view of the area surrounded by the dashed line in Fig. 7(a).

[0042] As shown in Fig. 7(a), the H-beam steel 200 is configured to have a flat first flange 201 and a flat second flange 202 disposed opposite each other, and a web 203 connecting the first flange 201 and the second flange 202. The upper surface of the first flange 201 is defined as an upper surface 201F, and the upper surface of the second flange 202 is defined as an upper surface 202F. In addition, both surfaces of the first flange 201 are defined as side surfaces 201S, and both surfaces of the second flange 202 are defined as side surfaces 202S.

[0043] The support mechanism 1 is used in a state where the carriage 10 is placed on the upper surface 201F of the first flange 201 or the upper surface 202F of the second flange 202. The support mechanism 1 is used to adjust the first flange 201 or the second flange 202 to an appropriate height by the grinder 100 grinding at least one of them.

[0044] 7(b), when the support mechanism 1 is attached to the first flange 201, the first roller 21 contacts the upper surface 201F. The second rollers 22A, 22B, 22E, and 22F contact the side surface 202S while sandwiching the second flange 202 from both the left and right sides. When the grinder 100 is moved back and forth relative to the H-beam 200, the first roller 21 rotates while contacting the upper surface 201F, and the second roller 22 rotates while contacting the side surface 202S.

[0045] Fig. 8 is a diagram showing the arrangement of the grinder 100 which changes depending on the purpose of use. In the process of grinding the H-shaped steel 200, it is common to go through the so-called rough cutting, adjustment, and finishing processes. Moreover, each of these processes is performed by changing the angle of the grinder 100 with respect to the H-shaped steel 200. That is, the grinding angle P formed by the polishing portion 102 and the upper surface 201F (or the upper surface 202F) is changed.

[0046] FIG. 8(a) is a diagram showing the rough cutting process. In the rough cutting process, the grinding angle P1 between the polishing portion 102 and the upper surface 201F is set to be the largest compared to each of the adjustment and finishing processes. This is because it is necessary to grind the end surface (upper surface 201F or upper surface 202F) of the H-shaped steel 200 significantly by the grinder 100. In order to achieve the grinding angle P1, the first support shaft 61 is inserted into the recess C. In this state, when the worker moves the grinder 100 back and forth, the polishing portion 102 deeply grinds the upper surface 201F. It is desirable that the grinding angle P1 be within a range of 22 degrees to 25 degrees.

[0047] 8(b) is a diagram showing the adjustment step. In the adjustment step, the grinding angle P2 formed by the polishing section 102 and the upper surface 201F is set to be smaller than the grinding angle P1 in the rough cutting step and larger than the grinding angle P3 in the finish cutting step. To achieve the grinding angle P2, the second support shaft 62 is inserted into the recess C. When the operator moves the grinder 100 back and forth in this state, the polishing section 102 shallowly grinds the upper surface 201F. It is desirable that the grinding angle P2 be within a range of 18 degrees to 21 degrees.

[0048] FIG. 8(c) is a diagram showing the finishing process. In the finishing process, the grinding angle P3 formed by the polishing portion 102 and the upper surface 201F is set to the smallest compared to the rough cutting and adjustment processes. This is because it is sufficient to only slightly grind the end surface (upper surface 201F or upper surface 202F) of the H-shaped steel 200 by the grinder 100. To achieve the grinding angle P3, the third support shaft 63 is inserted into the recess C. When the worker moves the grinder 100 back and forth in this state, the polishing portion 102 slightly grinds the upper surface 201F. It is desirable that the grinding angle P1 be within the range of 15 degrees to 17 degrees.

[0049] As described above, the grinder 100 is attached to the support mechanism 1 including the base portion 31, the support member 30 having a pair of walls 41, 42 rising from the base portion 31 and having a recess C extending in the vertical direction, the carriage 10 supporting the support member 30 movably relative to the H-beam steel 200, and the connecting member 50 connecting the grinder 100 to the support member 30 via the recess C in a swingable state. In this state, at least one of the first flange 201 or the second flange 202 of the H-beam steel 200 is ground. As a result, the upper surface 201F or the upper surface 202F is ground, so that the height of the first flange 201 or the second flange 202 is reduced. Therefore, the end face of the flange of the H-beam steel 200 can be ground with a simple configuration using a grinding device such as the grinder 100, and even if a dimensional deviation occurs in the H-beam steel 200, the dimensional deviation can be kept within the range of industrial standard values.

[0050] Although one embodiment and examples of the present invention have been described in detail above, it will be readily apparent to those skilled in the art that many modifications are possible without substantially departing from the novel features and effects of the present invention. Therefore, all such modifications are intended to be included within the scope of the present invention.

[0051] For example, a term described at least once in the specification or drawings together with a different term having a broader meaning or the same meaning may be replaced with the different term anywhere in the specification or drawings. In addition, the configuration of the support mechanism is not limited to those described in the embodiment and examples of the present invention, and various modifications are possible. [Explanation of symbols]

[0052] 1 Support mechanism, 10 Cart, 11 Base, 21 First roller, 22 Second roller, 30 Support member, 31 Base portion, 41 First wall portion, 42 Second wall portion, 50 Connecting member, 51 Extension portion, 52 Mounting portion, 53 Straight portion, 54 Horizontal portion, 61 First support shaft, 62 Second support shaft, 63 Third support shaft, 100 Grinder, 200 H-beam, 201F Top surface, C Recessed portion

Claims

1. A support mechanism for movably supporting a grinder used to grind an end surface of a steel material, comprising: A support member having a base portion and a pair of walls rising from the base portion and having a recess extending in the up-down direction; A carriage that supports the support member movably relative to the steel material; a connecting member that connects the grinder to the support member via the recess in a swingable state, The connecting member is in a state in which it can swing freely with respect to the supporting member, The connecting member has an extension portion extending in a moving direction of the grinder, The extension portion is provided with a plurality of pairs of support shafts protruding in a direction substantially perpendicular to the moving direction of the grinder, One of the pair of support shafts is inserted into the recess. A support mechanism characterized by:

2. The support member is provided with a spacer capable of changing the height of the pair of support shafts. The support mechanism according to claim 1 .

3. The cart includes: A first roller is disposed in contact with the end surface of the steel material and rotates about a rotation axis extending in a horizontal direction perpendicular to the moving direction of the grinder. The support mechanism according to claim 1 or 2, characterized in that

4. The cart includes: Further, a second roller is disposed in contact with the side surface of the steel material and rotates around a rotation axis extending in the vertical direction. The support mechanism according to claim 3 .

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