JP2016156325A - Vertical shaft type windmill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical shaft type windmill that is satisfactorily rotatable.SOLUTION: The vertical shaft type windmill comprises: a rotary shaft member which is coupled to a generator and erected in a freely rotatable manner in the state where a rotary shaft extends vertically; an arm 30 that extends from the rotary shaft member in a radiation direction of the rotary shaft; a coupling member 50 that is provided in a tip of the arm 30; and a blade member 70 that is coupled to the coupling member 50. The coupling member 50 includes: plate-like body parts 53A and 55A that are spread orthogonally to the radiation direction of the rotary shaft; and rib parts 53B and 55B that are bend from front edges and rear edges of the body parts 53A and 55A closer to the rotary shaft side. The blade member 70 includes a coupled part provided with a first fitting portion that is bonded to outer side faces of the body parts 53A and 55A of the coupling member 50, and a second fitting portion that is bonded to outer side faces of the rib parts 53B and 55B.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vertical axis wind turbine.

  Patent Document 1 discloses a conventional vertical axis type windmill. This vertical axis type windmill includes a rotating shaft member, five arms, and a wing member connected to the tip of each arm. The rotating shaft member is connected to the generator. The rotary shaft member is erected so that the rotary shaft extends in the vertical direction. Each arm extends in the radial direction of the rotating shaft at equal intervals around the rotating shaft member. The wing member is a streamlined wing shape formed from a thin plate-like metal. This wing member is notched on the rear side, leaving the front side of the inner side surface (side surface on the rotating shaft side). The wing member is formed with a rib connecting the vicinity of the rear end edge of the remaining inner side surface and the outer side surface (side surface opposite to the rotation axis). For this reason, this wing member has few components and is light and strong. In addition, the wing member has a block-shaped holder fitted in a recess surrounded by an inner surface, an outer surface, and a rib. The arm is provided with an internal thread portion extending from the distal end surface in a direction orthogonal to the distal end surface. In this arm, a screw member penetrating the wing member and the holder from the outer surface of the wing member is screwed into the female screw portion, and the tip surface abuts on the side surface on the rotating shaft side of the wing member to connect the wing member. Thus, this vertical axis type wind turbine can accurately position and connect the arm and the wing member.

Japanese Patent No. 4514502

  However, the vertical axis type windmill disclosed in Patent Document 1 connects the arm and the blade member with a single screw member penetrating the blade member and the holder. For this reason, when this vertical axis type windmill rotates, the bending stress generated with respect to the blade member concentrates on the screw member connecting the arm and the blade member. Therefore, when the rotational speed of the vertical axis type wind turbine is increased, the screw member may be damaged due to stress, and the wing member may drop from the arm. Further, in this vertical axis type windmill, the centrifugal force received by the wing member when it rotates rotates in the direction of pulling out the screw member from the female screw portion of the arm. In this vertical shaft type windmill, since the screw member and the female threaded portion of the arm are only screwed together, when the rotational speed of the windmill increases, the screw member is pulled out from the threaded portion of the arm by centrifugal force, and the wing member is There is a risk of falling off the arm.

  The present invention has been made in view of the above-described conventional situation, and an object to be solved is to provide a vertical-axis type wind turbine that can rotate satisfactorily.

A vertical shaft type windmill of the present invention is connected to a generator, and a rotary shaft member that is rotatable and stands in a state where the rotary shaft extends in the vertical direction;
An arm extending in a radial direction of the rotary shaft from the rotary shaft member;
A connecting member provided at the tip of the arm;
A wing member connected to the connecting member;
A vertical axis wind turbine with
The connecting member has a plate-like main body that extends in a direction perpendicular to the radial direction of the rotary shaft, and a rib that is bent toward the rotary shaft from the front and rear edges of the main body. ,
The wing member has a connected portion including a first attachment portion that is joined to the outer surface of the main body portion of the connection member and a second attachment portion that is joined to the outer surface of the rib portion. To do.

  This vertical shaft type windmill has rib portions bent from the front end edge and the rear end edge of the plate-like main body portion to the rotation shaft side in which the connecting member extends in a direction perpendicular to the radial direction of the rotation shaft. The side surface is joined to the second attachment portion of the wing member. For this reason, in this vertical axis type windmill, the rib portion of the connecting member functions as a strength member, and the bending stress generated on the blade member and the connecting member when rotating can be dispersed. Therefore, this vertical axis type windmill can maintain the connection between the blade member and the connecting member well even when the rotational speed increases. The direction orthogonal to the radial direction of the rotation axis is not limited to the case of being strictly orthogonal to the radial direction of the rotation axis, and the angle may be slightly deviated from the orthogonal direction.

  Therefore, the vertical axis type windmill of the present invention can rotate well.

It is a perspective view which shows the vertical axis type windmill of Example 1. FIG. It is sectional drawing which shows the vertical axis type windmill of Example 1. FIG. It is a perspective view which shows the wing | blade member of Example 1, a connection member, and a cover. It is sectional drawing which shows the wing | blade member of Example 1, and a connection member. FIG. 3 is an exploded cross-sectional view showing a wing member, a connecting member, and a cover of Example 1. FIG. 3 is a perspective view showing a connecting member of Example 1. It is a perspective view which shows the connection member of another Example.

  A preferred embodiment of the present invention will be described.

  In the vertical axis wind turbine of the present invention, the rib portion of the connecting member and the second attachment portion of the wing member may be joined by a joining member that penetrates the rib portion and the second attachment portion. In this case, the joining member that penetrates the rib portion and the second attachment portion can be extended in a direction (desirably orthogonal) that intersects the centrifugal force generated in the wing member when rotated. For this reason, in this vertical axis type windmill, the rib portion and the second attachment portion are not easily displaced along the joint surface between the rib portion and the second attachment portion, and the joining strength can be increased.

  In the blade member of the vertical axis type wind turbine according to the present invention, a recessed portion in which a side surface on the rotating shaft side is recessed may form the connected portion. In this case, the connecting member and the wing member can be connected in the recess so that the wing member is not exposed to the outside from the side surface. For this reason, this vertical axis type windmill can rotate satisfactorily because the flow of air flowing around the wing member is less likely to be disturbed and the decrease in lift can be suppressed.

  The wing member of the vertical axis type windmill of the present invention may have a cover that closes the opening of the concave portion forming the coupled portion and continues without a step on the side surface on the rotating shaft side around the coupled portion. In this case, the vertical axis wind turbine can rotate well because the cover allows the air flowing around the wing member to flow smoothly and exert a good lift.

  The blade member of the vertical axis wind turbine of the present invention is connected to the intermediate blade member having the connected portion, the front blade member connected to the front end portion of the intermediate blade member, and the rear end portion of the intermediate blade member. A rear wing member. In this case, the vertical axis wind turbine can connect the connecting member and the intermediate blade member before assembling the intermediate blade member, the front blade member, and the rear blade member. For this reason, this vertical axis type windmill can be easily assembled.

  Next, a first embodiment in which the vertical axis wind turbine of the present invention is embodied will be described with reference to the drawings.

<Example 1>
As shown in FIGS. 1 and 2, the vertical axis wind turbine according to the first embodiment includes a rotating shaft member 10, an arm 30, a connecting member 50, and a wing member 70. The rotating shaft member 10 has a cylindrical shape, and the rotating shaft extends in the vertical direction. The rotary shaft member 10 is coupled to a rotary shaft portion of a generator (not shown) disposed below via a connection component (not shown). The rotating shaft member 10 is rotatable together with the rotating shaft portion of the generator. The rotary shaft member 10 has four annular flanges 15 fixed to the outer peripheral surface at equal intervals. Each flange has four through-holes at three positions spaced at equal intervals. Each of the four through holes is provided at a vertex of a predetermined square.

  The arm 30 is formed of a rectangular flat plate member that is connected to the flange 15 and has a thin direction (vertical direction) parallel to the rotation axis. Three arms 30 extend straight from the flange 15 in the radial direction of the rotation axis at equal angular intervals (120 degrees). The arm 30 has four through holes penetrating in the vertical direction in each of the proximal end portion and the distal end portion. These four through-holes are provided at the apexes of a predetermined quadrangle made of a side parallel to the long side or the short side of the arm 30. The arm 30 and the flange 15 are connected by overlapping the four through holes at the base end portion of the arm 30 with the four through holes of the flange 15 and inserting bolts, and tightening the nuts to the inserted bolts. ing.

  The connection member 50 has the connection part 51, the front junction part 53, and the back junction part 55, as shown in FIGS. The connecting portion 51 is made of an aluminum alloy, and is formed of a flat plate material that is connected to the arm 30 and has a thin direction (vertical direction) parallel to the rotation axis. The connecting portion 51 has four through holes 51X extending in the vertical direction on the rotating shaft member 10 side of the central portion 51A. By connecting the four through holes 51X of the connecting part 51 to the four through holes at the tip of the arm 30 and inserting the bolts, and tightening the nuts to the inserted bolts, the connecting part 51 and the arm 30 are It is connected. In addition, the connecting portion 51 includes a front inclined portion 51B extending obliquely in the forward direction (front end direction of the wing member 70) from the central portion 51A to which the arm 30 is connected, and a rear direction (wing A rear inclined portion 51C extending obliquely in the rear end direction of the member 70 is provided. That is, the connecting portion 51 has a space between the front inclined portion 51B and the rear inclined portion 51C. The front end portion of the front inclined portion 51B and the front end portion of the rear inclined portion 51C are first from the first side portion 52A orthogonal to the arm 30 extending in the radial direction from the rotation axis and from the outer end portion of the first side portion 52A. A second side portion 52B that is orthogonal to the side portion 52A and extends toward the rotation axis is formed.

  The front joint portion 53 and the rear joint portion 55 are made of an aluminum alloy and are formed of an L-shaped angle material. The front joint part 53 and the connection part 51 are the inner surface of the center part of the longitudinal direction of the front joint part 53, the end surface of the 1st side part 52A of the front inclination part 51B of the connection part 51, and the end surface of the 2nd side part 52B. Are welded and integrated with each other. Further, the rear joint portion 55 and the connecting portion 51 are formed by the inner surface of the central portion in the longitudinal direction of the rear joint portion 55, the end surface of the first side portion 52A of the rear inclined portion 51C of the connecting portion 51, and the second side portion 52B. It is welded and integrated with the end face in contact. The front joint portion 53 and the rear joint portion 55 are each provided with six through holes 53X and 55X on two orthogonal surfaces. In the front joint portion 53 and the rear joint portion 55, the through holes 53 </ b> X and 55 </ b> X provided on the two orthogonal surfaces are on both the upper and lower sides with the connecting portion 51 welded to the front joint portion 53 and the rear joint portion 55 as a boundary. Three of them are arranged at equal intervals. These through holes 53X and 55X are used for joining the connecting member 50 and the blade member 70 through the shaft portion of the rivet 90 as a joining member, as will be described later.

  The front joint portion 53 and the rear joint portion 55 correspond to main body portions 53A and 55A in which one flat plate portion forming two orthogonal surfaces extends in a direction perpendicular to the radial direction of the rotation axis. That is, the main body portions 53A and 55A of the connecting member 50 are divided into two parts, front and rear, and have a plate shape. Further, the front joint portion 53 corresponds to a rib portion 53B in which the other flat plate portion forming two orthogonal surfaces is bent from the main body portion 53A to the rotating shaft side. Further, the rear joint portion 55 corresponds to a rib portion 55B in which the other flat plate portion forming two orthogonal surfaces is bent from the main body portion 55A to the rotating shaft side. That is, the rib portions 53B and 55B of the connecting member 50 are bent from the front end edge and the rear end edge of the two main body portions 53A and 55A toward the rotation axis.

  The connecting member 50 is formed by a connecting portion 51 having a central portion 51A, a front inclined portion 51B, and a rear inclined portion 51C, and a front inclined portion 51B and a rear inclined portion 51C having a space therebetween. In addition, the connecting member 50 connects the front joint portion 53 and the rear joint portion 55 formed of L-shaped angle material to the front inclined portion 51B and the rear inclined portion 51C of the connecting portion 51, and the main body portions 53A and 55A. And rib portions 53B and 55B are formed. By adopting such a configuration, the connecting member 50 can be reduced in weight while ensuring strength.

  As shown in FIGS. 3 to 5, the wing member 70 is a streamlined wing shape. The wing member 70 extends parallel to the rotation axis, and is connected to a connecting member 50 provided at the tip of the four arms 30. The wing member 70 includes a front wing member 71, an intermediate wing member 73, a rear wing member 75, a cover 77, and a lid member 79. The front wing member 71, the intermediate wing member 73, the rear wing member 75, and the cover 77 are formed by extrusion molding of an aluminum alloy.

  As shown in FIG. 5, the front wing member 71 has a front wing portion 71A and a front closing wall portion 71B. The front wing portion 71A is curved and has a front end portion of an inner side surface portion (side surface portion on the rotating shaft side) extending from the front edge of the wing member 70 and an outer side surface portion (side opposite to the rotating shaft) extending from the front edge of the wing member 70. The front end portion of the side surface portion) is configured. The front wing portion 71A is recessed at the rear portion of the portion constituting the outer surface portion of the wing member 70 at a position where the front end portion of the intermediate outer surface portion 73A of the intermediate wing member 73 described later overlaps. The front closing wall portion 71B has a substantially flat plate shape with a step provided in the middle, and connects both ends of the front wing portion 71A. Thus, the front wing member 71 has an internal space penetrating in the wing width direction, and the cross-sectional shape orthogonal to the wing width direction is substantially semi-elliptical.

  The intermediate wing member 73 has an intermediate outer surface portion 73A, a front wall portion 73B, a rear wall portion 73C, a connecting wall portion 73D, and two partition walls 73E. The intermediate outer surface portion 73 </ b> A slightly bulges outward in the chord direction and constitutes an intermediate portion of the outer surface portion of the wing member 70. The front wall portion 73B has a substantially flat plate shape, and extends in a direction substantially orthogonal to the intermediate outer surface portion 73A from the inner surface in the vicinity of the front end of the intermediate outer surface portion 73A. The rear wall 73C has a substantially flat plate shape, extends in the same direction as the front wall 73B from the inner surface near the rear end of the intermediate outer surface 73A, and extends in parallel to the front wall 73B. The connecting wall portion 73D has a flat plate shape and connects the intermediate portion of the front wall portion 73B and the intermediate portion of the rear wall portion 73C. Each partition wall 73E has a flat plate shape and is connected between the intermediate outer surface 73A and the connecting wall 73D. The intermediate outer surface 73A, the front wall 73B, the rear wall 73C, and the connecting wall 73D. The formed internal space penetrating in the blade width direction is divided into three spaces. The front wall 73B, the two partition walls 73E, and the rear wall 73C are arranged in parallel at substantially equal intervals. A space between the front wall portion 73B and the rear wall portion 73C and closer to the rotating shaft than the connecting wall portion 73D forms a recess 70A. 70 A of this recessed part can accommodate the front-end | tip part (The front-end | tip part of 51 C of front inclination parts, and the front-end | tip part of 51 C of back inclination parts) of the connection member 50, the front junction part 53, and the rear junction part 55.

  When the front joint portion 53 and the rear joint portion 55 are stored in the recess 70A, the outer surface of the main body portion 53A of the front joint portion 53 abuts on the front end portion of the connecting wall portion 73D, and the main body portion 55A of the rear joint portion 55 The outer side surface comes into contact with the rear end portion of the connecting wall portion 73D. That is, the front end portion and the rear end portion of the connecting wall portion 73 </ b> D of the intermediate blade member 73 correspond to the first attachment portion 70 </ b> B of the blade member 70. The connecting wall portion 73D is provided with a plurality of through holes 70X at a front end portion and a rear end portion corresponding to the first mounting portion 70B. The through holes 70X are provided at positions corresponding to the through holes 53X and 55X provided in the main body portion 53A of the front joint portion 53 and the main body portion 55A of the rear joint portion 55.

  Further, when the front joint portion 53 and the rear joint portion 55 are housed in the recess 70 </ b> A, the outer surface of the rib portion 53 </ b> B of the front joint portion 53 comes into contact with the front wall portion 73 </ b> B of the intermediate wing member 73. The outer surface of the rib portion 55B contacts the rear wall portion 73C of the intermediate blade member 73. That is, the front wall portion 73 </ b> B and the rear wall portion 73 </ b> C closer to the rotation shaft than the connecting wall portion 73 </ b> D of the intermediate blade member 73 correspond to the second attachment portion 70 </ b> C of the blade member 70. The front wall portion 73B and the rear wall portion 73C are provided with a plurality of through-holes 70Y closer to the rotating shaft than the connecting wall portion 73D corresponding to the second mounting portion 70C. These through holes 70Y are provided at positions corresponding to the through holes 53X and 55X provided in the rib part 53B of the front joint part 53 and the rib part 55B of the rear joint part 55. In this way, the recess 70A forms a non-connecting portion.

  The rear wing member 75 has a rear outer surface 75A, a rear inner surface 75B, and a rear closing wall 75C. The rear outer surface portion 75 </ b> A has a substantially flat plate shape and constitutes the rear portion of the outer surface of the wing member 70. The rear outer surface portion 75A is recessed at the front portion at a position where the rear end portion of the intermediate outer surface portion 73A of the intermediate wing member 73 overlaps, and a step is provided. The rear end of the rear outer surface portion 75 </ b> A is the rear edge of the wing member 70. The rear inner side surface portion 75 </ b> B has a substantially flat plate shape and constitutes a rear portion of the inner side surface of the wing member 70. The rear inner side surface portion 75B has a rear end portion connected to the front side slightly from the rear end of the rear outer side surface portion 75A. The rear closing wall portion 75C has a flat plate shape with a step in the middle, and connects the front end portion of the rear outer side surface portion 75A and the front end portion of the rear inner side surface portion 75B. The rear wing member 75 has an internal space penetrating in the wing width direction.

  As shown in FIG. 1, the cover 77 is attached to the wing member 70 so as to close the opening of the recess 70 </ b> A that opens to the inner surface of the wing member 70. The cover 77 is divided into five parts for one wing member 70. As shown in FIGS. 3 and 5, the cover 77 has an intermediate inner side surface portion 77 </ b> A, a front insertion piece portion 77 </ b> B, and a rear insertion piece portion 77 </ b> C. The intermediate inner side surface portion 77A swells slightly outward in the chord direction, and constitutes an intermediate portion of the inner side surface of the wing member 70. The cover 77 attached between the four connecting members 50 connected to the intermediate blade member 73 of the wing member 70 has a vertical dimension (a dimension in a direction parallel to the rotation axis) between the connecting portions 51 of each connecting member 50. Is the same. The cover 77 attached between the upper and lower ends of the wing member 70 and the connecting member 50 connected to the position closest to the upper and lower ends of the wing member 70 has a vertical dimension (a dimension in a direction parallel to the rotation axis). The distance from the upper and lower ends of 70 to the connecting portion 51 of each connecting member 50 is the same. The front insertion piece 77B has a flat plate shape and extends slightly from the front end of the intermediate inner surface 77A in the direction substantially orthogonal to the intermediate inner surface 77A. The rear insertion piece 77C has a flat plate shape, slightly in front of the rear end of the intermediate inner side surface 77A, in the same direction as the front insertion piece 77B, and extends in parallel with the front insertion piece 77B. The cover 77 is attached and fixed to the wing member 70 by inserting the front insertion piece 77B and the rear insertion piece 77C into the recess 70A formed in the intermediate wing member 73 of the wing member 70. The cover 77 is attached so as to close the opening of the recess 70A, and is continuous with the inner surface of the wing member 70 around the recess 70A without a step.

  As shown in FIG. 1, the lid member 79 has an outer shape having the same shape as the cross section in the chord direction of the wing member 70. The lid member 79 is attached and fixed to the upper and lower end surfaces of the wing member 70 so as to seal the upper and lower ends of the wing member 70.

The front wing member 71, the intermediate wing member 73, and the rear wing member 75 of the wing member 70 are assembled while the connecting member 50 is connected to the intermediate wing member 73 as described below.
First, as shown in FIGS. 4 and 5, the front end portion of the connecting portion 51 of the connecting member 50, the front joint portion 53, and the rear joint portion 55 are inserted into the recess 70 </ b> A formed in the intermediate blade member 73. At this time, the outer surface of the main body portion 53A of the front joint portion 53 is brought into contact with the front end portion of the connecting wall portion 73D as the first attachment portion 70B, and the outer surface of the main body portion 55A of the rear joint portion 55 is made to be the first attachment portion. It is made to contact | abut to the rear-end part of connection wall part 73D which is 70B. At this time, the outer surface of the rib portion 53B of the front joint portion 53 abuts on the front wall portion 73B of the intermediate blade member 73 as the second attachment portion 70C, and the outer surface of the rib portion 55B of the rear joint portion 55 is the first. 2 abuts against the rear wall portion 73C of the intermediate blade member 73 which is the attachment portion 70C.

  The main body portion 53A of the front joint portion 53 and the front end portion of the connection wall portion 73D, which is the first attachment portion 70B, are connected to the through-hole 53X provided in the main body portion 53A of the front joint portion 53 from the inside with a rivet 90 that is a joining member. The shaft portion is inserted, and the insertion end portion of the rivet 90 is caulked and joined. Further, the main body portion 55A of the rear joint portion 55 and the rear end portion of the connecting wall portion 73D as the first attachment portion 70B are joined to the through hole 55X provided in the main body portion 55A of the rear joint portion 55 from the inside by a joining member. A rivet 90 is inserted, and the insertion end of the rivet 90 is caulked and joined. Further, the rib portion 53B of the front joint portion 53 and the front wall portion 73B of the intermediate blade member 73 which is the second attachment portion 70C are rivets that are joining members from the front side to the through holes 70Y provided in the second attachment portion 70C. 90 is inserted, and the insertion end of the rivet 90 is caulked and joined. In addition, the rib portion 55B of the rear joint portion 55 and the rear wall portion of the intermediate blade member 73 that is the second attachment portion 70C are connected to the through hole 70Y provided in the second attachment portion 70C from the rear side by a rivet 90 that is a joint member. Is inserted, and the insertion end of the rivet 90 is caulked and joined.

  Next, the front wing member 71 and the rear wing member 75 are fitted and joined to the intermediate wing member 73 to which the connecting member 50 is connected by the rivet 90. Note that either the front wing member 71 or the rear wing member 75 may be joined to the intermediate wing member 73 first. In the wing member 70 assembled in this manner, the concave portion 70A of the intermediate wing member 73 has a side surface on the rotating shaft side recessed to form a coupled portion.

  In the vertical axis type wind turbine having such a configuration, the front end edge and the rear end of the plate-like main body portions 53A and 55A in which the front joint portion 53 and the rear joint portion 55 of the connecting member 50 extend in a direction orthogonal to the radial direction of the rotation shaft. Rib portions 53B and 55B that are bent from the end edge toward the rotating shaft side are formed, and the outer surface of the rib portions 53B and 55B is the second mounting portion 70C of the wing member 70. It is joined to the portion 73C. For this reason, in this vertical axis type windmill, the rib portions 53B and 55B of the connecting member 50 function as strength members, and the bending stress generated on the blade member 70 and the connecting member 50 when rotating can be dispersed. Therefore, this vertical axis type windmill can maintain the connection between the blade member 70 and the connecting member 50 well even when the rotational speed increases.

  Therefore, the vertical axis type windmill of Example 1 can rotate satisfactorily.

  Further, in this vertical axis type windmill, the rib portions 53B and 55B of the connecting member 50 and the second mounting portion 70C of the wing member 70 are joined by a rivet 90 that penetrates the rib portions 53B and 55B and the second mounting portion 70C. Yes. The rivet 90 extends in a direction substantially perpendicular to the centrifugal force generated in the blade member 70 when the vertical rotating shaft wind turbine rotates. For this reason, in this vertical axis type windmill, the rib portions 53B, 55B and the second mounting portion 70C are not easily displaced along the bonding surfaces of the rib portions 53B, 55B and the second mounting portion 70C, and the bonding strength can be increased. .

  Further, in the blade member 70 of this vertical axis type wind turbine, a recessed portion 70A having a recessed side surface on the rotating shaft side forms a connected portion. The connecting member 50 and the wing member 70 can be connected so that the wing member 70 is not exposed to the outside from the inner side surface. For this reason, this vertical axis type windmill can rotate satisfactorily because the flow of air flowing around the wing member 70 is less likely to be disturbed and the reduction in lift can be suppressed.

  Further, the blade member 70 of this vertical axis type wind turbine has a cover 77 that closes the opening of the concave portion 70A forming the connected portion and is continuous with the inner side surface of the blade member 70 around the connected portion without any step. doing. For this reason, this vertical axis type windmill can rotate satisfactorily because the flow of the air flowing around the wing member 70 is smoothed by the cover 77 and the lift force can be exhibited well.

  Further, the blade member 70 of the vertical axis type wind turbine includes an intermediate blade member 73 having a connected portion, a front blade member 71 connected to the front end portion of the intermediate blade member 73, and a rear end portion of the intermediate blade member 73. The rear wing member 75 is connected to the rear wing member 75. For this reason, this vertical axis type windmill can connect the connecting member 50 and the intermediate blade member 73 before assembling the intermediate blade member 73, the front blade member 71, and the rear blade member 75. For this reason, this vertical axis type windmill can be easily assembled.

The present invention is not limited to the first embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In Example 1, the connecting portion of the connecting member has a front inclined portion and a rear inclined portion, and a space is formed between them, as shown in FIG. The connecting portion 151 of the connecting member 150 may be formed of a flat plate material.
(2) In Example 1, the main body part and the rib part of the connecting part of the connecting member were formed separately in the front joint part and the rear joint part, but as shown in FIG. The main body portion 153 of the joint portion may be formed of a flat plate material that spreads over the whole, and the rib portions 155 may be formed by bending both ends thereof.
(3) In the first embodiment, the connecting member and the wing member are joined by the rivet, but the connecting member and the wing member may be joined by other means.
(4) In Example 1, although the to-be-connected part was formed by denting the side surface on the rotating shaft side of the wing member, the to-be-connected part may be formed without denting the side surface on the rotating shaft side of the wing member. .
(5) In Example 1, the cover for covering the concave portion is provided, but the cover may not be provided.
(6) Although the wing member is formed of the front wing member, the intermediate wing member, and the rear wing member in the first embodiment, the entire wing member may be integrally formed. Further, the wing member may be formed of two members, or four or more members.
(7) In Example 1, the connecting member and the wing member are formed of an aluminum alloy, but may be formed of other materials.
(8) In the first embodiment, the rotating shaft member is cylindrical and can be rotated together with the rotating shaft portion of the generator. However, the rotating shaft member is arranged around a columnar or cylindrical shaft portion and the shaft portion. You may form with the cylindrical part provided rotatably. If the shaft portion is cylindrical, a cable or the like can be passed through the shaft portion.
(9) In Example 1, the lid member has the same shape as the cross section in the chord direction of the wing member. However, the lid member may protrude from the inner and outer surfaces of the wing member in a shape larger than the cross section in the chord direction of the wing member. . The lid member may have a shape different from the cross-sectional shape in the chord direction.

DESCRIPTION OF SYMBOLS 10 ... Rotary shaft member 30 ... Arm 50 ... Connecting member 53A, 55A ... Main-body part 53B, 55B ... Rib part 70 ... Wing member 70A ... Recessed part (to-be-connected part)
70B ... 1st attaching part 70C ... 2nd attaching part 71 ... Front side wing member 73 ... Intermediate wing member 75 ... Rear side wing member 77 ... Cover 90 ... Rivet (joining member)

Claims (5)

A rotating shaft member connected to the generator and rotatably standing in a state where the rotating shaft extends in the vertical direction;
An arm extending in a radial direction of the rotary shaft from the rotary shaft member;
A connecting member provided at the tip of the arm;
A wing member connected to the connecting member;
A vertical axis wind turbine with
The connecting member has a plate-like main body that extends in a direction perpendicular to the radial direction of the rotary shaft, and a rib that is bent toward the rotary shaft from the front and rear edges of the main body. ,
The wing member has a connected portion including a first attachment portion that is joined to the outer surface of the main body portion of the connection member and a second attachment portion that is joined to the outer surface of the rib portion. A vertical axis windmill.   The vertical axis wind turbine according to claim 1, wherein the rib portion of the connecting member and the second attachment portion of the wing member are joined by a joining member that penetrates the rib portion and the second attachment portion. .   The vertical axis type wind turbine according to claim 1 or 2, wherein the wing member has a recessed portion in which a side surface on a rotating shaft side is recessed to form the connected portion.   The wing member has a cover that closes an opening of the concave portion that forms the connected portion, and that is continuous without a step on a side surface on the rotating shaft side around the connected portion. 3. A vertical axis wind turbine according to 3.   The blade member includes an intermediate blade member having the connected portion, a front blade member connected to a front end portion of the intermediate blade member, and a rear blade member connected to a rear end portion of the intermediate blade member. The vertical axis type windmill according to any one of claims 1 to 4, wherein the windmill is a vertical axis type windmill.

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