Fixing mechanism of blade component

Abstract

To improve workability in positioning, while enhancing accuracy in positioning a blade component.SOLUTION: A blade component (10) has a shape extending along a predetermined axis direction. A fixing mechanism (1) is provided with: a first receiving part (25) that positions one end side in the axis direction in the blade component, in a direction crossing the axis direction, by fitting irregularities thereof into each other; a second receiving part (58) that positions the other end side in the axis direction in the blade component, in a direction crossing the axis direction, by fitting irregularities thereof into each other; and an axis gripping mechanism (26) that moves the first receiving part and the second receiving part relatively along the axis direction and restricts the relative movement thereof.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a blade component fixing mechanism that positions a blade component when the blade component is machined. [Background technology]

[0002] Patent Document 1 discloses a blade surface polishing device that includes an articulated robot equipped with a gripping jig that grips and fixes a steam turbine vane to be polished, and a belt grinder device. Patent Document 2 also discloses a method for processing a turbine blade while holding both ends of the blade with a double-ended gripping device. The double-ended gripping device in Patent Document 2 consists of a pair of hinged molds connected by a joint so that they can be opened and closed, and these hinged molds are attached to both ends of the turbine blade to grip it. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-326150 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-174876 Summary of the Invention [Problem to be solved by the invention]

[0004] In the double-end gripping tool of Patent Document 2, the ends of the turbine blade are clamped by closing a pair of open hinged forms. In this case, if the gripping force of the forms is increased, the fixed position of the turbine blade is likely to shift when the forms are attached, which causes a problem that it takes time to adjust the position and fix the turbine blade, impairing workability.

[0005] The present invention has been made in consideration of the above-described circumstances, and aims to provide a blade component fixing mechanism that can improve the positioning accuracy of the blade component while improving the ease of positioning work. [Means for solving the problem]

[0006] The blade component fixing mechanism of the present invention is a blade component fixing mechanism having a shape that extends along a predetermined axial direction, and is characterized by comprising: a first receiving portion that positions one axial end side of the blade component in a direction intersecting the axial direction by a recessed and protruding fit; a second receiving portion that positions the other axial end side of the blade component in a direction intersecting the axial direction by a recessed and protruding fit; and an axial gripping mechanism that moves the first receiving portion and the second receiving portion relative to each other along the axial direction and regulates this relative movement. [Effects of the Invention]

[0007] According to the present invention, each receiving portion can position both axial ends of the blade component in a direction intersecting the axial direction by fitting the recesses and grooves, and the blade component can be positioned in the axial direction by the shaft gripping mechanism. This allows for accurate positioning in three axial directions, including the axial direction and the intersecting direction, and the blade component can be easily positioned by inserting the recesses and grooves in each receiving portion and moving each receiving portion. Therefore, compared to a conventional configuration in which the blade end is clamped by a mold, it is possible to reduce adjustment work, shorten work time, and improve positioning workability. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a schematic perspective view of a fixing mechanism according to an embodiment. [Figure 2] FIG. 2 is a schematic perspective view of the fixing mechanism, taken from a different perspective from that of FIG. [Figure 3] FIG. 3 is a perspective view similar to FIG. 2, showing a state in which the blade component is fixed. [Figure 4] FIG. 2 is a front view of FIG. [Figure 5] FIG. 5 is a front view similar to FIG. 4, showing an intermediate stage of positioning the blade components. [Figure 6] FIG. 5 is a front view similar to FIG. 4 showing a state in which the blade component is positioned via the shaft gripping mechanism. [Figure 7] 5 is a front view similar to FIG. 4 in which the rotation of the blade component is restricted by the rotation restriction mechanism. FIG. [Figure 8] 5 is a front view similar to FIG. 4, showing a state in which the position of the first receiving portion has been adjusted by the adjustment mechanism. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] A blade component fixing mechanism according to one embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Note that the present invention is not limited to the following embodiment, and can be implemented by appropriate modifications within the scope of the present invention. For the sake of convenience, some components may be omitted in the following drawings.

[0010] In the following description, the X, Y, and Z directions indicated by arrows in each drawing are used as references. In the following embodiments, the X and Y directions are parallel to the horizontal direction, and the Z direction is parallel to the vertical direction, but these directions may be changed as long as the same functions as those in the embodiments can be achieved.

[0011] Fig. 1 is a schematic perspective view of a fixing mechanism according to an embodiment. Fig. 2 is a schematic perspective view of the fixing mechanism from a different perspective than that of Fig. 1. Fig. 3 is a perspective view similar to Fig. 2, showing a state in which a blade component is fixed. As shown in Figs. 1 to 3, a fixing mechanism 1 according to an embodiment is used as a jig when processing a blade component 10.

[0012] Although the blade component 10 is not particularly limited, in this embodiment it is a steam turbine blade and has a shape that extends along a predetermined axial direction (in this embodiment, the X direction). Such a blade is polished to remove roughness on the blade surface in order to reduce air resistance.

[0013] From the perspective of stabilizing processing quality and improving productivity, automation of blade polishing processing by using a robot to move and operate the polishing machine is being considered. In this automation, the coordinates of the blade and the robot are calculated and specified, but if the fixed position (coordinate) of the blade deviates from the robot's coordinates, the polishing location and polishing amount will differ from the design data. Therefore, when polishing the blade, it is necessary to maintain good positioning accuracy. Therefore, in this embodiment, the configuration of the fixing mechanism 1 described below is adopted.

[0014] 1 to 3, the blade component 10 to be machined in this embodiment has an airfoil-shaped portion 11 provided in a shape extending with the X direction as the axial direction. The airfoil-shaped portion 11 is provided in a shape optimized in accordance with the specifications of the steam turbine.

[0015] In addition, the blade component 10 has a one-end forming portion 13 formed at the end portion on the -X side, which is one axial end side of the wing-shaped portion 11, and an other-end forming portion 14 formed at the end portion on the +X side, which is the other axial end side of the wing-shaped portion 11.

[0016] The one-end forming portion 13 and the other-end forming portion 14 each have a portion formed in the shape of a hexagonal prism whose width in the Y and Z directions is wider than that of the blade-shaped portion 11. A first recess 15 (see FIG. 2) is formed so as to recess the -X side end face of the one-end forming portion 13, and a second recess 16 (see FIG. 1) is formed so as to recess the +X side end face of the other-end forming portion 14. Thus, the first recess 15 is formed at one axial end (X direction) of the blade component 10, and the second recess 16 is formed at the other axial end. The specific shapes of the recesses 15, 16 will be described later.

[0017] 4 is a front view of FIG. 1, showing the state before the blade component 10 is fixed to the fixing mechanism 1. As shown in FIG. 4, the fixing mechanism 1 is supported by two aluminum frames 20 (not shown in FIGS. 1 to 3) that are arranged at a predetermined distance in the X direction and extend in the Y direction. The fixing mechanism 1 is disposed across the two aluminum frames 20 and includes a fixing base 21 that is parallel to the XY plane, and a support wall 22 that is connected to the end of the fixing base 21 on the +X side and parallel to the YZ plane. A reinforcing member 23 is provided between the fixing base 21 and the support wall 22.

[0018] The fixing mechanism 1 further includes a first receiving portion 25 provided above the fixing base 21, a shaft gripping mechanism 26, and an adjustment mechanism 27. The first receiving portion 25 is formed with a first protrusion 25a that can be fitted into the first recess 15 of the blade component 10.

[0019] The shaft gripping mechanism 26 includes a holding member 30 that holds the first receiving portion 25, a first moving mechanism 31 that moves the first receiving portion 25 along the X direction together with the holding member 30, and a first assisting mechanism 32 that assists the movement of the holding member 30 and the first receiving portion 25 in the X direction.

[0020] 1 to 3, the shaft gripping mechanism 26 is provided on a first movable plate 35 that extends in the X direction and is parallel to the XY plane. A second movable plate 36 is provided directly below the first movable plate 35 and parallel to the first movable plate 35, and the first movable plate 35 is integrated with the second movable plate 36 via three support pillars 37.

[0021] The holding member 30 is provided in a block shape extending in the Y direction, and a first receiving portion 25 is formed in the center in the Y direction on the side surface on the +X side.

[0022] The first moving mechanism 31 includes a first toggle clamp 39 provided in the -X side area on the upper surface of the first movable plate 35, a forward / backward shaft 40 connected to the first toggle clamp 39 and extending in the X direction, and a first pressing mechanism 41 connecting the forward / backward shaft 40 and the holding member 30.

[0023] The first toggle clamp 39 includes a handle 43 and a link mechanism 44 to which a base of the handle 43 is rotatably connected. The link mechanism 44 is connected to the end of the advancing / retreating shaft 40 on the -X side. By rotating the handle 43, the link mechanism 44 moves the advancing / retreating shaft 40 in the X direction by an amount of movement that is shorter than the amount of such operation. Therefore, the first moving mechanism 31 is provided so that the advancing / retreating shaft 40, the first pressing mechanism 41, the holding member 30, and the first receiving portion 25 can be moved along the X direction by operating the handle 43.

[0024] Furthermore, when a force in the −X direction is applied to the advancing / retreating shaft 40, the link mechanism 44 restricts movement of the advancing / retreating shaft 40 in the −X direction. Therefore, the first moving mechanism 31 is provided so as to be able to restrict movement of the advancing / retreating shaft 40, the first pressing mechanism 41, the holding member 30, and the first receiving portion 25 in the X direction via the link mechanism 44.

[0025] The first pressing mechanism 41 includes a spring holder 46 connected to the +X side end of the advancing / retreating shaft 40 and extending in the Y direction, two spring members 47 provided between the spring holder 46 and the holding member 30, and two guide shafts 48 that pass through the spring holder 46 and are inserted into the spring members 47.

[0026] The spring member 47 is formed of a compression coil spring and constantly exerts a force in a direction that moves the spring holder 46 and the holding member 30 away from each other in the X direction. The +X side end of the guide shaft 48 is fixed to the holding member 30. The guide shaft 48 passes through the spring holder 46 but is not fixed to the spring holder 46, and is provided so as to be displaceable relative to the spring holder 46 in the X direction. Therefore, when the advancing / retreating shaft 40 moves in the +X direction while the movement of the holding member 30 and the first receiving portion 25 in the X direction is restricted, the spring member 47 is compressed via the spring holder 46. The spring member 47 compressed in this manner can exert a force that presses the holding member 30 and the first receiving portion 25 toward the +X side.

[0027] The first auxiliary mechanism 32 includes a guide rail 50 that is provided on the upper surface of the first movable plate 35 and extends in the X direction, and a slide block 51 that moves in the X direction by sliding along the guide rail 50. The slide block 51 is fixed to the lower surface of the holding member 30, and slides in the X direction together with the holding member 30. In this way, the first auxiliary mechanism 32 guides the movement of the holding member 30 and the first receiving portion 25 parallel to the X direction.

[0028] The adjustment mechanism 27 includes a rail member 53 extending in the X direction on the upper surface of the fixed base 21, and a slider 54 that moves in the X direction by sliding on the rail member 53. The lower surface of the second movable plate 36 is fixed to the upper surface of the slider 54, so that the adjustment mechanism 27 supports the first moving mechanism 31 and the first receiving portion 25 from below via the movable plates 35, 36 and the support column 37. The adjustment mechanism 27 is also provided so that the first moving mechanism 31 and the first receiving portion 25 that it supports from below can move along the X direction.

[0029] The adjustment mechanism 27 also includes a stopper 56 made of a shaft member that penetrates the second movable plate 36, and a receiving portion 57 that is formed as a hole or recess in the fixed base 21 and receives the lower end of the stopper 56. A plurality of receiving portions 57 are formed and aligned in the X direction. By receiving the lower end of the stopper 56 in the receiving portion 57, the adjustment mechanism 27 restricts movement in the X direction of the first moving mechanism 31 including the second movable plate 36 and the first receiving portion 25.

[0030] Furthermore, the adjustment mechanism 27 removes the lower end of the stopper 56 from the receiving portion 57, thereby releasing the restriction on movement in the X direction of the first moving mechanism 31 including the second movable plate 36 and the first receiving portion 25. Then, by moving the first moving mechanism 31 and the like in the X direction via the rail member 53 and the slider 54 and then receiving the lower end of the stopper 56 in another receiving portion 57, the first receiving portion 25 can be positioned at multiple locations in the X direction.

[0031] The fixing mechanism 1 further includes a second receiving portion 58 provided on the support wall 22, and a rotation restricting mechanism 60. The second receiving portion 58 is provided to protrude from the -X side surface of the upper part of the support wall 22, and is fixed in all three directions including the X direction. The second receiving portion 58 is formed with a second protrusion 58a that can be fitted into the second recess 16 of the blade component 10.

[0032] Here, the shapes of the first recess 15 and the first protrusion 25a, as well as the second protrusion 58a and the second recess 16, will be described using an enlarged cross-sectional view of the circle indicated by the two-dot chain line in FIG. 6. First, the first recess 15 and the first protrusion 25a will be described. The first recess 15 has a tapered inner circumferential surface, while the first protrusion 25a has a tapered outer circumferential surface, and each tapered surface is formed in a conical shape whose diameter gradually decreases in the +X direction. Therefore, when viewed in cross section on a plane parallel to the X direction, the first recess 15 and the first protrusion 25a are formed in a substantially V-shape.

[0033] The tapered surface of first recess 15 and the tapered surface of first protrusion 25a have the same taper angle, and when first protrusion 25a is inserted into first recess 15, their tapered surfaces come into surface contact, enabling tapered alignment. With the tapered surfaces aligned in this manner, first protrusion 25a holds the -X side end of blade component 10 by fitting the protrusions and recesses with first recess 15, and positions the end in a direction along the YZ plane. In other words, the fitting of first protrusion 25a and first recess 15 positions the -X side end of blade component 10 in a direction (direction along the YZ plane) intersecting the axial direction (X direction) of blade component 10.

[0034] The second recess 16 and the second protrusion 58a are configured to be substantially symmetrical in the X direction to the first recess 15 and the first protrusion 25a. Explained below, the second recess 16 has a tapered inner circumferential surface, while the second protrusion 58a has a tapered outer circumferential surface, and each tapered surface is formed in a conical shape whose diameter gradually decreases in the -X direction. Therefore, when viewed in cross section along a plane parallel to the X direction, the second recess 16 and the second protrusion 58a are formed in a substantially V-shape.

[0035] The tapered surface of the second recess 16 and the tapered surface of the second protrusion 58a have the same taper angle, and when the second protrusion 58a is inserted into the second recess 16, their tapered surfaces come into surface contact, enabling tapered alignment. With the tapered surfaces aligned in this manner, the second protrusion 58a holds the +X side end of the blade component 10 by fitting the protrusions and recesses with the second recess 16, and positions the end in a direction along the YZ plane. In other words, the fitting of the second protrusion 58a with the second recess 16 positions the +X side end of the blade component 10 in a direction (direction along the YZ plane) that intersects the axial direction (X direction) of the blade component 10.

[0036] Returning to Figures 1 and 4, the rotation restriction mechanism 60 includes an abutment member 61 arranged at a predetermined distance from the -X side surface of the support wall 22, a support portion 62 that supports the abutment member 61, a second moving mechanism 63 that moves the abutment member 61 along the Z direction together with the support portion 62, and a second auxiliary mechanism 64 that assists the movement of the support portion 62 and the abutment member 61 in the Z direction.

[0037] The abutting member 61 is provided in a block shape extending in the Y direction, and is provided so as to be able to abut against the other end forming portion 14 of the blade component 10 that is positioned via the second receiving portion 58.

[0038] The support portion 62 includes two support shafts 66 that extend in the X direction through the support wall 22 and have contact members 61 fixed to their -X side ends, and a support block 67 to which the +X side ends of the two support shafts 66 are connected. The support block 67 is disposed at a predetermined distance from the +X side surface of the support wall 22.

[0039] The second moving mechanism 63 includes a second toggle clamp 69 provided in the lower region of the +X side surface of the support wall 22, a forward / backward shaft 70 connected to the second toggle clamp 69 and extending in the Z direction, and a second pressing mechanism 71 connecting the forward / backward shaft 70 to the support block 67.

[0040] The second toggle clamp 69 includes a handle 73 and a link mechanism 74 to which a base of the handle 73 is rotatably connected. The link mechanism 74 is connected to the end (lower end) of the advancing / retreating shaft 70 on the -Z side. By rotating the handle 73 along the Z direction, the link mechanism 74 moves the advancing / retreating shaft 70 in a direction opposite to the Z direction, while setting the movement amount to be shorter than the amount of such operation. Therefore, the second moving mechanism 63 is provided so that the advancing / retreating shaft 70, the second pressing mechanism 71, the support portion 62, and the abutting member 61 can be moved along the Z direction by operating the handle 73.

[0041] Furthermore, when a force in the −Z direction is applied to the advancing / retreating shaft 70, the link mechanism 74 restricts movement of the advancing / retreating shaft 70 in the −Z direction. Therefore, the second movement mechanism 63 is provided so as to be able to restrict movement of the advancing / retreating shaft 70, the second pressing mechanism 71, the support portion 62, and the abutting member 61 in the Z direction via the link mechanism 74.

[0042] The second pressing mechanism 71 includes a spring holder 76 connected to the +Z side end (upper end) of the advancing / retreating shaft 70 and extending in the Y direction, two spring members 77 provided between the spring holder 76 and the support block 67, and two guide shafts 78 that pass through the spring holder 76 and are inserted into the spring members 77.

[0043] The spring member 77 is formed of a compression coil spring and constantly exerts a force in a direction that moves the spring holder 76 and the support block 67 away from each other in the Z direction. The +Z side end of the guide shaft 78 is fixed to the support block 67. The guide shaft 78 passes through the spring holder 76 but is not fixed to the spring holder 76, and is provided so as to be displaceable relative to the spring holder 76 in the Z direction. Therefore, when the advancing / retreating shaft 70 moves in the +Z direction while the movement of the support portion 62 and the abutting member 61 in the Z direction is restricted, the spring member 77 is compressed via the spring holder 76. The spring member 77 compressed in this manner can exert a force that presses the support portion 62 and the abutting member 61 toward the +Z side.

[0044] The second auxiliary mechanism 64 includes a guide rail 80 that is provided on the +X side surface of the support wall 22 and extends in the Z direction, and a slide block 81 that slides along the guide rail 80 and moves in the Z direction. The slide block 81 is fixed to the -X side surface of the support block 67, and slides in the Z direction together with the support part 62 that includes the support block 67. In this way, the second auxiliary mechanism 64 guides the movement of the support part 62 and the abutment member 61 parallel to the Z direction.

[0045] Next, a method for fixing the blade component 10 using the fixing mechanism 1 of the above embodiment will be described with reference to Figs. 5 to 7 in addition to Fig. 4. Fig. 5 is a front view similar to Fig. 4, showing an intermediate stage of positioning the blade component. Fig. 6 is a front view similar to Fig. 4, showing a state in which the blade component has been positioned via the shaft gripping mechanism. Fig. 7 is a front view similar to Fig. 4, showing a state in which rotation of the blade component has been restricted by the rotation restriction mechanism.

[0046] First, as shown in Fig. 4, the second protrusion 58a of the second receiving portion 58 is inserted into the second recess 16 of the blade component 10, resulting in the state shown in Fig. 5. Next, the first protrusion 25a of the first receiving portion 25 is inserted into the first recess 15 of the blade component 10, with the axial direction of the blade component 10 aligned parallel to the X direction.

[0047] To perform this insertion, the first convex portion 25a and the first concave portion 15 of the first receiving portion 25 are roughly aligned in the X direction, and then the handle 43 of the first toggle clamp 39 is rotated in the direction shown by the arrow in Fig. 5. This moves the advance / retract shaft 40, the first pressing mechanism 41, the holding member 30, and the first receiving portion 25 in the +X direction. With this movement, as shown in Fig. 6, the first convex portion 25a is inserted into the first concave portion 15, and the second convex portion 58a is maintained inserted into the second concave portion 16, so that both ends of the blade component 10 in the X direction are held via the convex portions 25a and 58a.

[0048] In the above-described rotation operation of the handle 43, even after the movement of the holding member 30 and the first receiving portion 25 in the X direction has stopped, they continue to move a predetermined angle before reaching the rotation limit. In this state, the link mechanism 44 of the first toggle clamp 39 restricts the movement of the advancing / retreating shaft 40 in the −X direction, and restricts the movement of the first receiving portion 25 in the −X direction.

[0049] Furthermore, even after first receiving portion 25 has stopped, the rotation operation of handle 43 continues, and advance / retract shaft 40 moves in the +X direction, compressing spring member 47 in first pressing mechanism 41. Then, the elasticity of compressed spring member 47 urges first receiving portion 25 toward the +X side, and a force pressing first receiving portion 25 toward blade component 10 acts, and a force pressing second receiving portion 58 against blade component 10 acts as a reaction to this force.

[0050] As a result of the forces acting in this way, the first protrusion 25a and the second protrusion 58a sandwich and grip the blade component 10 from both sides in the X direction, and the blade component 10 is positioned in the X direction (axial direction).

[0051] Furthermore, due to the elastic force of the spring member 47, the first recess 15 and the first protrusion 25a press against each other, and the second recess 16 and the second protrusion 58a press against each other. As a result, the blade component 10 is positioned in the Y and Z directions by the tapered alignment of the first recess 15 and the first protrusion 25a and the tapered alignment of the second recess 16 and the second protrusion 58a. This completes the positioning of the blade component 10 in the three orthogonal axial directions by the first receiving portion 25 and the second receiving portion 58.

[0052] In this state, the handle 73 of the second toggle clamp 69 in the second moving mechanism 63 is rotated in the direction shown by the arrow in Fig. 6. This moves the advancing / retreating shaft 70, the second pressing mechanism 71, the support portion 62, and the abutting member 61 in the +Z direction (upward), and as shown in Fig. 7, the upper surface of the abutting member 61 abuts (makes surface contact with) the horizontal lower surface of the other-end forming portion 14 of the blade component 10. This restricts rotation of the blade component 10 about the axial direction (X direction), and the blade component 10 is fixed.

[0053] Even after the movement of the support part 62 and the abutment member 61 in the Z direction is stopped by the abutment between the other-end forming part 14 and the abutment member 61, the rotation of the handle 73 continues for a predetermined angle before reaching its rotation limit. In this state, the link mechanism 74 of the second toggle clamp 69 restricts the movement of the advance / retreat shaft 70 in the -Z direction, and restricts the movement of the abutment member 61 in the -X direction.

[0054] Furthermore, since the rotation operation of the handle 43 continues even after the movement of the abutment member 61 is restricted, the movement of the advance / retract shaft 70 toward the +Z side causes the spring member 77 to be compressed by the second pressing mechanism 71. Then, the elasticity of the compressed spring member 77 urges the abutment member 61 toward the +Z side, and a force is applied to press the abutment member 61 against the other-end forming portion 14 of the blade component 10.

[0055] According to the above embodiment, the blade component 10 can be positioned in the Y and Z directions by the engagement of the first and second receiving portions 25 and 58 at both axial ends of the blade component 10. Furthermore, the shaft gripping mechanism 26 moves the first receiving portion 25 toward the second receiving portion 58, and the blade component 10 can be positioned in the X direction by gripping it axially. This allows for good positioning in the three orthogonal axial directions of X, Y, and Z, and allows the blade component 10 to be positioned by a simple operation of inserting the respective protrusions 25a, 58a into the respective recesses 15, 16 and moving the first receiving portion 25. This positioning method reduces adjustments and other work, shortening work time and improving positioning workability compared to conventional configurations in which the blade end is clamped by a mold.

[0056] Furthermore, since the first recess 15 and the first protrusion 25a are tapered together, and the second recess 16 and the second protrusion 58a are tapered together, the above-mentioned movement in the X direction can simultaneously perform positioning in the X direction as well as in the direction along the YZ plane. Therefore, this tapered alignment can further reduce the time required for the positioning work and facilitate the positioning work.

[0057] Furthermore, the rotation restriction mechanism 60 can restrict rotation of the blade component 10 around the X axis, allowing for better positioning of the blade component 10. This makes it possible to avoid misalignment when machining the blade component 10 fixed to the fixing mechanism 1, thereby improving machining accuracy.

[0058] Furthermore, the first receiving portion 25 and the abutment member 61 are moved by operating the handles 43, 73 in the shaft gripping mechanism 26 and the rotation restricting mechanism 60, making it easy to manually position the blade component 10. Moreover, the use of the toggle clamps 39, 69 makes it easy to restrict the first receiving portion 25 and the abutment member 61 from moving in the direction opposite to the positioning direction.

[0059] Furthermore, by providing the first pressing mechanism 41, it is possible to prevent the tapered surfaces of the recesses 15, 16 and the protrusions 25a, 58a from separating from each other, thereby better maintaining the positioning state of the blade component 10 in the three orthogonal axial directions. Also, by providing the second pressing mechanism 71, it is possible to prevent the abutting member 61 that abuts against the other-end forming portion 14 of the blade component 10 from separating, thereby better maintaining the state in which rotation of the blade component 10 about the X axis is restricted.

[0060] Here, the fixing mechanism 1 can also fix a blade component 10A having an axial length different from that of the above embodiment, as shown in Fig. 8. Fig. 8 is a front view similar to Fig. 4, showing a state in which the position of the first receiving portion has been adjusted by the adjustment mechanism.

[0061] In this embodiment, the first receiving portion 25 and the first moving mechanism 31 can be moved in the X direction via the rail member 53 and the slider 54 of the adjustment mechanism 27. Furthermore, by selecting the receiving portion 57 into which the lower end of the stopper 56 is inserted, the first receiving portion 25 can be positioned at multiple locations in the X direction. Therefore, the distance between the first receiving portion 25 and the second receiving portion 58 can be adjusted according to the axial length of the blade component 10A, and versatility can be imparted so that blade components 10, 10A of various axial lengths can be fixed with a single fixing mechanism 1.

[0062] The present invention is not limited to the above-described embodiments, and can be modified in various ways. In the above-described embodiments, the size and shape shown in the accompanying drawings are not limited to these, and can be modified as appropriate within the scope of the effects of the present invention. In addition, the present invention can be modified as appropriate without departing from the scope of the object of the present invention.

[0063] The configuration of the first receiving portion 25 and the second receiving portion 58 can be modified in various ways as long as they can be positioned in a direction intersecting the axial direction by fitting of the recesses and projections with the blade component 10. For example, a first recess may be formed in the first receiving portion 25 while a first protrusion is formed on the one-end forming portion 13 of the blade component 10, and a second recess may be formed in the second receiving portion 58 while a second protrusion is formed on the other-end forming portion 14 of the blade component 10. Even with this configuration, by forming tapered surfaces in each recess and each protrusion, positioning by tapered alignment similar to the above embodiment can be performed.

[0064] Furthermore, the recesses 15, 16 and the protrusions 25a, 58a are not limited to the shape having the tapered surface described above, and may be modified as long as they can be positioned in the same manner as in the above embodiment. For example, the protrusions may be configured as round shafts and the recesses as round holes, or the protrusions may be configured as rectangular protrusions, and the recesses may be formed in a shape that tightly receives the rectangular protrusions.

[0065] Furthermore, in the shaft gripping mechanism 26, the first receiving portion 25 is movable and the second receiving portion 58 is fixed, and the receiving portions 25, 58 are configured to move relatively in the X direction, but both the first receiving portion 25 and the second receiving portion 58 may also be movable and move relatively. [Explanation of symbols]

[0066] 1:Fixing mechanism 10: Blade parts 15: First recess 16: Second recess 25: First receiving part 25a: First convex part 26: Axis gripping mechanism 27:Adjustment mechanism 31: 1st movement mechanism 41: First pressing mechanism 43: Handle 58: Second receiving part 58a: Second convex part 60: Rotation restriction mechanism 61: Contact member 63:Second movement mechanism 71: Second pressing mechanism 73: Handle

Claims

1. A fixing mechanism for a blade component having a shape extending along a predetermined axial direction, a first receiving portion that positions the one axial end side of the blade component in a direction intersecting the axial direction by fitting a recess and a protrusion together; a second receiving portion that positions the other axial end side of the blade component in a direction intersecting the axial direction by fitting a recess and a protrusion together; a shaft gripping mechanism that moves the first receiving portion and the second receiving portion relative to each other along the axial direction and restricts the relative movement.

2. One of a first recess and a first protrusion is formed on the one axial end side of the blade component, the first receiving portion is formed with the other of the first recess and the first protrusion, The blade component fixing mechanism according to claim 1 , wherein the first recess and the first protrusion each have a tapered surface that can be tapered together.

3. One of a second recess and a second protrusion is formed on the other axial end side of the blade component, the second receiving portion is formed with the other of the second recessed portion and the second protruding portion, The blade component fixing mechanism according to claim 2 , wherein the second recess and the second protrusion each have a tapered surface that can be tapered together.

4. The blade component fixing mechanism according to claim 3 , wherein the shaft gripping mechanism includes a first moving mechanism that moves the first receiving portion along the axial direction by operating a handle.

5. 5. The blade component fixing mechanism according to claim 4, wherein the first moving mechanism includes a first pressing mechanism that applies a force that presses the first recess and the first protrusion against each other and that presses the second recess and the second protrusion against each other.

6. The blade component fixing mechanism according to claim 4 , further comprising an adjustment mechanism that moves the first receiving portion and the first moving mechanism along the axial direction and restricts the movement.

7. the second receiving portion is fixed in the axial direction, 7. The blade component fixing mechanism according to claim 1, further comprising a rotation restriction mechanism that abuts against the blade component positioned by the first receiving portion and the second receiving portion and restricts rotation of the blade component around the axial direction.

8. The blade component fixing mechanism according to claim 7, characterized in that the rotation restriction mechanism comprises an abutment member that abuts against the blade component, and a second moving mechanism that moves the abutment member to a position where it abuts against the blade component by operating a handle.

9. The blade component fixing mechanism according to claim 8 , wherein the second moving mechanism includes a second pressing mechanism that applies a force to press the contact member against the blade component.

Images