JP2012239641A - Leg portion structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leg portion structure in which the length of the legs can be adjusted and play is hardly caused.SOLUTION: The leg portion structure 10 includes: sleeves 20A, 20B having a plurality of lock pieces 23 to be deformable by bending with upper end parts as fulcrums; a supporter 11 to be inserted to the sleeves 20A, 20B; a fixing ring 50 to be fitted to the circumferences of the lock pieces 23; and a nut 60 for moving the fixing ring 50 upward by being screwed onto the fixing ring 50 and fastening the lock pieces 23 and the supporter 11. Projections 53 to be engaged with the side surfaces of the lock pieces 23 are formed on the inner peripheral surface of the fixing ring 50.

Description

  The present invention relates to a leg structure that can be suitably used for a care product such as a portable toilet or a bath tub, and can be adjusted in length.

  Nursing care products having a leg structure that supports a main body, such as a portable toilet and a bathtub stand, are known. In this kind of care article, it is preferable that the height of the main body can be easily adjusted according to the physique of the user. Conventionally, as a leg structure of a care product, a leg structure that can be adjusted in length has been used.

  Patent Document 1 describes a leg structure of a portable toilet that can be adjusted in length. The leg structure includes an upper column and a base column that is slidably inserted into the upper column. A plurality of holes arranged vertically are formed in the upper column and the base column. When adjusting the length, adjust the insertion amount of the base column appropriately so that one of the holes in the upper column and one of the holes in the base column overlap, and insert the rod-shaped lock pawl into the holes. To do. Thereby, the length of the leg structure is set. Next, the upper support column and the base support column are fixed using a tightening ring. A male screw portion is formed on the outer peripheral surface of the lower end portion of the upper support column, and a female screw portion that engages with the male screw portion is formed on the inner peripheral surface of the tightening ring. By screwing the tightening ring into the lower end of the upper column, the upper column and the base column are tightened and fixed to each other.

  Patent Document 2 also describes a portable toilet support leg that can be adjusted in length. The support legs are inserted into circular holes formed at the four corners of the toilet body. A plurality of vertical grooves and horizontal grooves intersecting each other are formed on the outer peripheral surface of the support leg. A plate-like protrusion that meshes with the lateral groove is formed on the inner peripheral surface of the circular hole. The height of the portable toilet is adjusted by adjusting the insertion amount of the support leg into the circular hole. When adjusting the height of the portable toilet, the support leg is rotated counterclockwise, and the plate-like protrusion is moved from the horizontal groove into the vertical groove. Next, the support leg is slid in the length direction until the plate-like protrusion comes to a desired lateral groove position. Next, the support leg is rotated in the clockwise direction, and the plate-like protrusion is engaged with the lateral groove. Since the plate-like protrusion located in the lateral groove is restricted from moving in the vertical direction, the height of the portable toilet is fixed.

JP 2010-240166 A JP 2003-24243 A

  In a leg structure such as a care product, it is desirable that rattling is as small as possible so that elderly people who are users do not feel anxiety as much as possible. However, in the leg structure described in Patent Document 1, for example, when some rotational force is applied to the upper support column or the base support column, the tightening ring is loosened, and rattling occurs between the upper support column and the base support column. May occur.

  In the support leg described in Patent Document 2, if a counterclockwise rotational force is applied from the outside for some reason, the plate-like protrusion may move from the lateral groove into the vertical groove. In this case, the vertical displacement of the support legs is not regulated, and there is a possibility that rattling occurs between the support legs and the toilet body.

  This invention is made | formed in view of this point, The place made into the objective is providing the leg part structure which length adjustment is possible and it is hard to generate | occur | produce rattling.

  The leg structure according to the present invention includes a sleeve main body having an opening formed at least on one end side, and an axial direction extending from one end side of the sleeve main body and being spaced apart from each other in the circumferential direction. A plurality of locking pieces that can be flexibly deformed as fulcrums, a support column inserted into the sleeve so that the amount of insertion can be changed, and a radially outer side of the locking pieces, An inner surface sandwiching the locking piece between the outer peripheral surface of the column and at least a part of the locking piece being rotated in a predetermined direction causes the locking piece to bend and deform inward in the radial direction, thereby locking the locking piece. A fastening member that fastens the piece and the support, and the fastening member rotates in an opposite direction to the predetermined direction when the locking piece and the support are fastened to the inner surface of the fastening member. So as to regulate, in which the convex portion to be engaged with the side surface of the locking piece is formed.

  According to the leg structure, when the fastening member is rotated in a predetermined direction, the locking piece of the sleeve is bent inward in the radial direction and is sandwiched between the support column and the fastening member. Thereby, a sleeve and a support | pillar are fixed by the fastening member. A convex portion that engages with the side surface of the locking piece is formed on the inner surface of the fastening member. Therefore, the reverse rotation of the tightening member is restricted. Since the fastening member is difficult to loosen, rattling between the sleeve and the column can be suppressed.

  The fastening member is preferably formed in a substantially cylindrical shape.

  Thus, the entire periphery of the locking piece and the support of the sleeve can be tightened, and the sleeve and the support can be firmly fixed.

  It is preferable that the inner surface of the fastening member is inclined so as to go inward in the radial direction toward the side opposite to the sleeve body side.

  Thus, the locking piece can be bent inward in the radial direction simply by moving the fastening member toward the sleeve body. The sleeve and the support column can be easily fixed by the fastening member.

  The tightening member includes a cylindrical member having an inner peripheral surface on which the convex portion is formed and an outer peripheral surface on which a male screw portion is formed, and an inner screw portion that is engaged with the male screw portion of the cylindrical member. A nut having a peripheral surface, and by screwing the nut into the cylindrical member, the cylindrical member moves to the sleeve body side, and the locking piece and the support column are interposed via the cylindrical member. The nut may be configured to be tightened.

  Accordingly, when the nut is rotated in a predetermined direction with respect to the cylindrical member in a state where the cylindrical member is fitted around the locking piece so that the convex portion engages with the side surface of the locking piece, the cylindrical shape The member moves to the sleeve body side. Along with this, the locking piece bends inward in the radial direction, and the locking piece and the support come into close contact with each other. The locking piece and the support column are fastened to the nut via a cylindrical member. There is no need to rotate the tubular member when the nut rotates. Therefore, unlike the case where the convex part is formed on the inner peripheral surface of the nut, it is not necessary to rotate the nut with such a large force that the convex part gets over the locking piece and fits into the gap between the locking pieces. It is. Therefore, the work of fixing the sleeve and the support becomes easy.

  The sleeve may be configured by assembling a plurality of sleeve parts divided in a cross section along the longitudinal direction of the sleeve, and each sleeve part may be provided with at least one locking piece.

  Since the locking piece is fastened together with the support by the fastening member, even if the sleeve is composed of a plurality of sleeve parts, they are not separated. By constructing the sleeve from a plurality of sleeve parts, the sleeve can be easily manufactured as compared with the case where the entire sleeve is integrally formed.

  One end of the sleeve body is provided with a locking claw positioned radially outward from the locking piece, and an engaging portion that engages with the locking claw is provided on the outer surface of the fastening member. It may be formed.

  This restricts the fastening member from moving to the side opposite to the sleeve main body when the locking claw and the engaging portion are engaged. Therefore, loosening of the fastening member is suppressed, and even if the fastening member is loosened, it is prevented from coming off.

  An internal thread portion is formed on the inner peripheral surface of the sleeve, an external thread portion that engages with the internal thread portion of the sleeve is formed on the outer peripheral surface of the support column, and by rotating the support column and the sleeve relatively, The insertion amount may be configured to be adjustable.

  Thus, the length of the leg structure can be easily adjusted by rotating the column with respect to the sleeve. In addition, the length of the leg structure can be arbitrarily adjusted within a range where the male screw portion and the female screw portion are engaged.

  ADVANTAGE OF THE INVENTION According to this invention, length adjustment is possible, The leg part structure which is hard to generate | occur | produce rattling can be provided.

It is a perspective view of the portable toilet provided with the leg part structure. It is a disassembled perspective view of a leg part structure. It is a front view of a leg part structure. It is a side view of a leg part structure. It is a front view of one sleeve component. It is a rear view of one sleeve component. It is a front view of the other sleeve component. It is a longitudinal cross-sectional view of a leg part structure, and is the sectional view on the AA line of FIG. It is another longitudinal cross-sectional view of a leg part structure. It is a front view of a fixing ring. It is a top view of a fixing ring. It is the BB sectional view taken on the line of FIG. It is a front view of a nut. It is a longitudinal cross-sectional view of a nut.

  As shown in FIG. 1, the leg part structure 10 which concerns on this embodiment is provided in the portable toilet 1 as an example of care goods. However, the application target of the leg structure 10 is not limited to the portable toilet 1 but may be other care products such as a bathtub table. Moreover, the leg part structure 10 can also be applied to things other than care supplies.

  The portable toilet 1 includes a toilet body 2 on which a toilet seat 5 is formed, a backrest 4, an armrest 3, and a leg structure 10 provided at a lower portion of the toilet body 2. The leg structure 10 is provided at the four corners of the toilet body 2. Holes (not shown) are formed at the four corners of the lower surface of the toilet body 2. In these holes, sleeves 20 (see FIG. 3) of the leg structure 10 described later are inserted. The sleeve 20 of the leg structure 10 is fixed in the hole.

  2 is an exploded perspective view of the leg structure 10, FIG. 3 is a front view thereof, and FIG. 4 is a side view thereof. As shown in FIGS. 2 to 4, the leg structure 10 is configured to fix the sleeve 20 in which the sleeve parts 20 </ b> A and 20 </ b> B are combined, the column 11 inserted into the sleeve 20, and the sleeve 20 and the column 11. The fixing ring 50 and the nut 60, and a terminal plug 70 fitted into the upper opening of the sleeve 20 are provided. The leg structure 10 is configured such that the length can be adjusted by adjusting the amount of the column 11 inserted into the sleeve 20. The fixing ring 50 and the nut 60 are for fixing the sleeve 20 and the column 11 by fastening the sleeve 20 and the column 11.

  In the leg structure 10 according to the present embodiment, the support column 11 is disposed on the lower side of the sleeve 20, but the vertical positions thereof may be reversed. That is, the column 11 may be disposed on the upper side of the sleeve 20.

  The column 11 includes a disk-shaped pedestal 12 and a column main body 13 extending upward from the pedestal 12. The pedestal 12 and the column main body 13 are integrally formed of polypropylene (PP). However, the base 12 and the column main body 13 may be formed separately and assembled to each other. The material of the support 11 is not limited to synthetic resin, but may be other material such as metal. The column main body 13 is formed in a hollow cylindrical shape. However, the column main body 13 may be solid. A male screw portion 14 formed of a spiral groove is formed on the outer peripheral surface of the column main body 13. A rubber cover 15 is attached to the lower portion of the base 12. The cover 15 prevents the leg structure 10 from slipping.

  The sleeve 20 is constituted by a pair of sleeve parts 20A and 20B. The sleeve parts 20A and 20B are assembled together to form a substantially cylindrical sleeve 20. The sleeve parts 20 </ b> A and 20 </ b> B are two parts divided by a cross section (vertical surface) along the longitudinal direction of the sleeve 20. However, the sleeve 20 may be formed of three or more parts divided in a cross section along the longitudinal direction of the sleeve 20. The sleeve parts 20 </ b> A and 20 </ b> B are fixed to each other by a fixing ring 50.

  FIG. 5 is a front view of the sleeve part 20A, and shows the inner structure of the sleeve part 20A. FIG. 6 is a rear view of the sleeve part 20A, and shows the outer structure of the sleeve part 20A. FIG. 7 is a front view of the sleeve component 20B, showing the inner structure of the sleeve component 20B.

  As shown in FIG. 5, the sleeve component 20 </ b> A is formed with a convex portion 31 protruding to the front side and a concave portion 32 recessed to the back side. As shown in FIG. 7, the sleeve component 20 </ b> B is also formed with a convex portion 31 protruding to the front side and a concave portion 32 recessed to the back side. When the sleeve part 20A and the sleeve part 20B are overlapped, the convex part 31 of the sleeve part 20A fits into the concave part 32 of the sleeve part 20B, and the convex part 31 of the sleeve part 20B fits into the concave part 32 of the sleeve part 20A. . The convex portion 31 and the concave portion 32 facilitate positioning of the sleeve component 20A and the sleeve component 20B. However, the convex portion 31 and the concave portion 32 are not necessarily required. The sleeve component 20A and the sleeve component 20B have the same configuration except that the positions of the convex portion 31 and the concave portion 32 are different.

  FIG. 8 is a longitudinal sectional view of the leg structure 10, and is a sectional view taken along line AA in FIG. FIG. 9 is another longitudinal sectional view of the leg structure 10. The cross section shown in FIG. 9 is a cross section at a position different from the cross section shown in FIG.

  As shown in FIGS. 8 and 9, the sleeve 20 includes a sleeve main body 22 having an opening 21 formed at the lower end, and a plurality of locking pieces 23 extending downward from the sleeve main body 22. A flange portion 25 protruding outward in the radial direction is formed at the lower end portion of the sleeve body 22. The locking piece 23 extends downward from the flange portion 25. The locking pieces 23 are arranged in a circular shape through a gap 24 (see FIG. 2). Here, the four locking pieces 23 are arranged at equal intervals. However, the number of the locking pieces 23 may be two or more, and is not necessarily limited to four. The sleeve parts 20A and 20B are made of a synthetic resin such as polypropylene (PP) and are integrally formed by injection molding or the like. The locking piece 23 can be bent and deformed inward in the radial direction with the upper end portion as a fulcrum as a fulcrum. The outer peripheral surface of the lower part of the locking piece 23 is inclined so as to go inward in the radial direction as it goes downward. At the lower end portion of the locking piece 23, a convex portion 29 protruding outward in the radial direction is formed. The outer surface of the convex portion 29 is inclined so as to go inward in the radial direction as it goes downward.

  On the inner peripheral surface of the sleeve 20, a female thread portion 26 formed of a spiral groove is formed. As shown in FIGS. 5 and 7, a female thread portion 26 is formed on the inner peripheral surfaces of the sleeve main body 22 and the locking piece 23 of the sleeve components 20 </ b> A and 20 </ b> B. As shown in FIG. 8, the internal thread portion 26 of the sleeve 20 is engaged with the external thread portion 14 of the support column 11. When the support 11 is rotated with respect to the sleeve 20, the insertion amount of the support 11 is changed. Here, when the support column 11 is rotated clockwise in plan view, the insertion amount of the support column 11 is reduced, and the length of the leg structure 10 is increased. When the support column 11 is rotated counterclockwise in plan view, the insertion amount of the support column 11 is increased and the length of the leg structure 10 is shortened.

  A claw 27 is formed at the lower end of the sleeve body 22. The number of claws 27 is not particularly limited, but here two claws 27 are provided. The two claws 27 are arranged on the opposite sides across the center of the sleeve 20. In other words, the two claws 27 are arranged at positions different by 180 ° around the center of the sleeve 20. The cross-sectional shape of each claw 27 is formed in an arc shape. Each claw 27 is formed of a claw 27A (see FIG. 5) and a claw 27B (see FIG. 7). The claw 27A is formed on the sleeve part 20A, and the claw 27B is formed on the sleeve part 20B. When the sleeve part 20A and the sleeve part 20B are combined, the claw 27A and the claw 27B overlap in the circumferential direction to form the claw 27. However, each claw 27 is not necessarily formed by the two claws 27A and 27B. The claw 27 may be a single piece. For example, one claw 27 may be formed on each of the sleeve parts 20A and 20B.

  The claw 27 extends downward from the flange portion 25 of the sleeve body 22. The length of the claw 27 is shorter than the length of the locking piece 23. The claw 27 is provided radially outward from the locking piece 23. At the tip of the claw 27, a convex portion 28 protruding inward in the radial direction is provided. The inner surface of the convex portion 28 is inclined so as to go inward in the radial direction toward the sleeve main body 22 side. In other words, the inner surface of the convex portion 28 is a tapered surface that opens downward. Similar to the locking piece 23, the claw 27 is formed integrally with the sleeve body 22. The nail | claw 27 can bend and deform | transform using the upper end part which is a root part as a fulcrum.

  FIG. 10 is a front view of the fixing ring 50, and FIG. 11 is a plan view of the fixing ring 50. 12 is a cross-sectional view taken along line BB in FIG. The fixing ring 50 is formed in a substantially cylindrical shape. A male screw portion 51 is formed on the outer peripheral surface of the fixing ring 50. A flange portion 52 that protrudes outward in the radial direction is formed on the upper end portion of the fixing ring 50.

  As shown in FIG. 12, a convex portion 53 extending in the axial direction is formed on the inner peripheral surface of the fixing ring 50. Here, the convex part 53 is comprised by the two ribs 53a and 53b. However, the convex part 53 may be comprised by one rib. The rib 53a and the rib 53b are adjacent to each other in the circumferential direction. As shown in FIG. 11, the distance between the end portion of the rib 53 a opposite to the rib 53 b side and the end portion of the rib 53 b opposite to the rib 53 a side is the lateral width W of the convex portion 53. The lateral width W of the convex portion 53 is equal to or smaller than the interval of the gap 24 of the locking piece 23 of the sleeve 20. In other words, the convex portion 53 is formed in a size that can be inserted into the gap 24 of the locking piece 23. Here, the lateral width W of the convex portion 53 is substantially equal to the interval of the gap 24. As described above, the four locking pieces 23 are arranged at equal intervals on the sleeve 20. Four gaps 24 are formed in the sleeve 20. In the fixing ring 50, four convex portions 53 are formed at equal intervals in the circumferential direction so as to correspond to the four gaps 24 of the sleeve 20.

  As shown in FIG. 12, the inner peripheral surface 54 of the lower part of the fixing ring 50 is formed so that the inner diameter becomes smaller as it goes downward. In other words, the inner peripheral surface 54 is a tapered surface inclined so as to go inward as it goes downward. The inner diameter D2 of the lower end portion of the fixing ring 50 is smaller than the inner diameter D1 of the upper end portion. The inner diameter D1 of the upper end portion of the fixing ring 50 is substantially the same as the outer diameter of the locking piece 23 of the sleeve 20 when not deformed. The inner diameter D2 of the lower end portion of the fixing ring 50 is smaller than the outer diameter of the locking piece 23 of the sleeve 20 when not deformed. The fixing ring 50 is integrally formed of a synthetic resin such as ABS.

  13 is a front view of the nut 60, and FIG. 14 is a longitudinal sectional view of the nut. The nut 60 is formed in a substantially cylindrical shape. The nut 60 includes a flange portion 61, a nut main body portion 62, and a pedestal portion 63. The flange portion 61 is provided at the upper end portion of the nut 60. The flange portion 61 protrudes outward in the radial direction. The outer side surface 61a of the flange portion 61 is inclined so as to go inward in the radial direction as it goes upward. Between the flange part 61 and the nut main-body part 62, the recessed part 64 dented inward in the radial direction is formed. As shown in FIG. 14, an internal thread portion 65 is formed on the inner peripheral surface of the nut main body portion 62. The pedestal 63 is provided below the nut body 62. The inner diameter and outer diameter of the pedestal 63 are larger than the inner diameter and outer diameter of the nut main body 62, respectively. The nut 60 is integrally formed of a synthetic resin such as polypropylene (PP).

  Next, a method for assembling the leg structure 10 will be described. First, the sleeve component 20A and the sleeve component 20B are overlapped to form the sleeve 20.

  Next, the fixing ring 50 is fitted around the locking piece 23 of the sleeve 20. Specifically, the convex portion 53 of the fixing ring 50 is inserted into the gap 24 between the locking pieces 23 of the sleeve 20, and the fixing ring 50 is slid toward the sleeve main body 22 side. As described above, the outer peripheral surface of the lower portion of the locking piece 23 is inclined so as to go inward in the radial direction as it goes downward. The outer surface of the convex portion 29 of the locking piece 23 is inclined so as to go inward in the radial direction as it goes downward. Therefore, the fixing ring 50 can be easily fitted around the locking piece 23. Since the inner diameter D2 of the lower end portion of the fixing ring 50 is smaller than the outer diameter of the locking piece 23, when the fixing ring 50 is slid toward the sleeve body 22, the locking piece 23 is deformed inward in the radial direction. To do. The fixing ring 50 is locked to the locking piece 23 by the restoring force of the locking piece 23.

  Next, the nut 60 is attached to the fixing ring 50. As described above, the external thread portion 51 is formed on the outer peripheral surface of the fixing ring 50, and the internal thread portion 65 is formed on the inner peripheral surface of the nut 60. By engaging the male screw portion 51 and the female screw portion 65 and rotating the nut 60 in a predetermined direction (for example, counterclockwise in a plan view) with respect to the fixing ring 50, the nut 60 is placed around the fixing ring 50. Can be attached. At this time, the nut 60 is loosely tightened with respect to the fixing ring 50 so that the locking piece 23 is not greatly bent inward via the fixing ring 50. As the nut 60 rotates, the flange portion 61 at the upper end of the nut 60 gradually moves upward. Eventually, the flange portion 61 gets over the convex portion 28 of the claw 27 of the sleeve 20 and moves above the convex portion 28. The outer surface 61a of the flange portion 61 is inclined so as to go inward in the radial direction as it goes upward, and the inner side surface of the convex portion 28 is inclined so as to go inward in the radial direction as it goes upward. Therefore, when the outer side surface 61a contacts the inner side surface, the flange portion 61 pushes the claw 27 outward in the radial direction. Therefore, when the nut 60 is attached to the fixing ring 50, the flange portion 61 can easily get over the convex portion 28. When the flange portion 61 moves above the convex portion 28, the flange portion 61 and the convex portion 28 are engaged. Thereby, the downward movement of the nut 60 is restricted, and the nut 60 is prevented from falling off.

  Next, the support | pillar 11 is inserted in the sleeve 20, the fixing ring 50, and the nut 60 which were assembled as mentioned above. Specifically, the upper end portion of the column 11 is inserted in the order of the nut 60 and the locking piece 23 of the sleeve 20, the male screw portion 14 of the column 11 and the female screw portion 26 of the sleeve 20 are engaged, and the column 11 is connected to the sleeve 20. Rotate against. As the column 11 rotates, the amount of the column 11 inserted into the sleeve 20 increases, and the length of the leg structure 10 decreases. When the length of the leg structure 10 reaches a desired length, the support 11 stops rotating.

  Next, the sleeve 20 and the column 11 are fixed by tightening the nut 60. When the nut 60 is rotated, the fixing ring 50 moves upward. The inner peripheral surface 54 of the lower portion of the fixing ring 50 is inclined so as to go inward in the radial direction as it goes downward. As the fixing ring 50 rises, the amount of bending of the locking piece 23 increases, and the locking piece 23 is strongly pressed against the outer peripheral surface of the column 11. The locking piece 23 and the column 11 are more closely attached. Thus, when the nut 60 is tightened, the sleeve 20 and the support column 11 are strongly fixed by the fixing ring 50.

  As described above, the leg structure 10 is adjusted to a desired length. Since the sleeve 20 and the column 11 are firmly fixed, rattling is unlikely to occur.

  When the length of the leg structure 10 is changed, the nut 60 is reversely rotated and the fixing ring 50 is moved slightly downward. At this time, the locking piece 23 is restored by its own elastic force and moves outward in the radial direction. Thereby, the close contact state between the sleeve 20 and the column 11 is released, and the column 11 can be rotated with respect to the sleeve 20. Next, the length of the leg structure 10 is adjusted to a desired length by rotating the support 11 with respect to the sleeve 20. When the length of the leg structure 10 reaches a desired length, the nut 60 is tightened to fix the sleeve 20 and the support 11.

  As described above, according to the leg structure 10 according to the present embodiment, when the nut 60 is rotated in a predetermined direction, the locking piece 23 of the sleeve 20 is bent inward in the radial direction, and the locking piece 23 is the support column. The support 11 and the locking piece 23 are fastened to the fixing ring 50 while being in close contact with the fixing ring 50. Therefore, the support 11 and the sleeve 20 are firmly fixed. Therefore, rattling is unlikely to occur between the support column 11 and the sleeve 20. A convex portion 53 is formed on the inner peripheral surface of the fixing ring 50, and the convex portion 53 engages with the side surface of the locking piece 23. The reverse rotation of the fixing ring 50 with respect to the sleeve 20 is restricted. Even if force is applied to the support 11 or the sleeve 20 so as to rotate them in opposite directions, the nut 60 will not loosen unless the nut 60 is rotated in reverse with respect to the fixing ring 50. Therefore, since the nut 60 is difficult to loosen, rattling between the sleeve 20 and the column 11 can be suppressed.

  Both the fixing ring 50 and the nut 60 are formed in a substantially cylindrical shape. With the fixing ring 50 and the nut 60, the entire periphery of the locking piece 23 of the sleeve 20 and the support column 11 can be tightened. Therefore, the sleeve 20 and the column 11 can be fixed more firmly. The rattling between the sleeve 20 and the support column 11 can be further suppressed.

  The inner peripheral surface 54 of the lower portion of the fixing ring 50 is formed so that the inner diameter becomes smaller toward the distal end side of the locking piece 23. Therefore, simply by moving the fixing ring 50 toward the sleeve main body 22, the locking piece 23 can be bent inward in the radial direction, and the locking piece 23 and the column 11 can be firmly fixed. According to this embodiment, the sleeve 20 and the support | pillar 11 can be fixed easily.

  In the present embodiment, the fastening member for fastening the sleeve 20 and the column 11 is constituted by the fixing ring 50 and the nut 60. When the nut 60 is rotated in a predetermined direction with respect to the fixing ring 50 in a state where the fixing ring 50 is fitted around the locking piece 23 so that the convex portion 53 engages with the side surface of the locking piece 23, the fixing ring 50 50 moves to the base side of the locking piece 23, and the nut 60 is screwed into the fixing ring 50. Thereby, the locking piece 23 is bent inward in the radial direction, and the locking piece 23 and the support column 11 are firmly tightened by the fixing ring 50. When the nut 60 is rotated, it is not necessary to rotate the fixing ring 50. Therefore, unlike the case where the convex portion 53 is formed on the inner peripheral surface of the nut 60, the rotation is performed with a large force such that the convex portion 53 gets over the locking piece 23 and fits into the gap 24 during the rotation operation. It is not necessary. Therefore, the operation of fixing the sleeve 20 and the support column 11 is facilitated.

  The sleeve 20 is constituted by sleeve components 20A and 20B divided by a cross section (vertical surface) along the longitudinal direction of the sleeve 20. Since the locking piece 23 is fastened together with the support 11 by the fixing ring 50, even if the sleeve 20 is composed of the sleeve parts 20A and 20B, the sleeve parts 20A and 20B are not separated. By constructing the sleeve 20 from the two sleeve parts 20A and 20B, the sleeve 20 can be easily manufactured as compared with the case where the entire sleeve 20 is integrally formed.

  When the convex part 28 of the claw 27 of the sleeve 20 and the flange part 61 of the nut 60 are engaged, the nut 60 is restricted from moving downward. Therefore, it can suppress that the nut 60 loosens. Moreover, even if the nut 60 is loosened, it can be prevented from coming off.

  In the present embodiment, the engaging portion of the nut 60 that engages with the claw 27 of the sleeve 20 is formed by the flange portion 61. However, the engaging portion that engages with the claw 27 is not limited to the flange portion 61. Moreover, the flange part 61 is not necessarily required. For example, the downward movement of the nut 60 may be restricted by the engagement between the convex portion 28 of the claw 27 and the concave portion 64 of the nut 60. The engaging portion that engages with the convex portion 28 of the claw 27 is not limited to the convex portion (the flange portion 61 or the like of the present embodiment) protruding outward in the radial direction of the nut 60, but the radially inner side of the nut 60. It may be a recessed portion or the like that is recessed. Further, the claw 27 may be formed with a concave portion, and the engaging portion of the nut 60 may be a convex portion that engages with the concave portion. The engagement structure between the claw 27 of the sleeve 20 and the engagement portion of the nut 60 is not limited to the engagement structure of the present embodiment.

  A female screw portion 26 is formed on the inner peripheral surface of the sleeve 20, and a male screw portion 14 that engages with the female screw portion 26 is formed on the outer peripheral surface of the column 11. Therefore, the length of the leg portion structure 10 can be adjusted by a simple operation of simply rotating the support 11 with respect to the sleeve 20. Further, the length of the leg structure 10 can be arbitrarily adjusted within a range in which the male screw portion 14 and the female screw portion 26 are engaged.

<Modification>
The present invention is not limited to the above embodiment, and can be implemented in various other forms. Hereinafter, some modified examples will be briefly described.

  The fastening member that fastens the locking piece 23 of the sleeve 20 and the column 11 is not limited to the combination of the fixing ring 50 and the nut 60. The fastening member may be, for example, a single cylindrical member. For example, a male screw portion is formed on the outer peripheral surface of the locking piece 23 of the sleeve 20, a female screw portion that engages with the male screw portion on the inner peripheral surface of the fastening member, and a convex portion that engages with the side surface of the locking piece 23. And may be formed. In this case, when the fastening member is rotated, the locking piece 23 is pushed by the inner peripheral surface of the fastening member, and is bent inward in the radial direction. Thereby, the locking piece 23 and the support | pillar 11 are fixed by the fastening member. As the tightening member rotates, the convex portion gets over the locking piece 23 and enters the gap 24. As a result, the convex portion engages with the locking piece 23, and the reverse rotation of the fastening member is prevented.

  The fastening member does not necessarily have to be formed in a substantially cylindrical shape. For example, the fastening member may be formed in a substantially C shape. For example, the clamping member may be a deformable C-ring. The fastening member may be composed of a synthetic resin C-ring. By attaching a substantially C-shaped fastening member to the locking piece 23 from the side, the locking piece 23 and the support column 11 can be fastened.

  The convex portion 53 of the fixing ring 50 may not be a rib extending in the axial direction. For example, the convex portion 53 may be formed in a hemispherical shape.

  The locking piece 23 does not necessarily have to be provided at the lower end of the sleeve 20. The locking piece 23 may be provided in the middle of the sleeve 20.

  The outer surface of the convex portion 29 of the locking piece 23 does not necessarily have to be inclined. The outer surface of the convex portion 29 may be a vertical surface. Moreover, the convex part 29 is not necessarily required and can be omitted.

  The inner surface of the convex portion 28 of the claw 27 and the outer surface 61a of the flange portion 61 of the nut 60 do not necessarily have to be inclined. The inner surface of the convex portion 28 and the outer surface 61a of the flange portion 61 may be vertical surfaces. The recess 64 of the nut 60 is not always necessary. Further, as described above, the downward movement of the nut 60 is restricted by the engagement between the convex portion 28 of the claw 27 and the concave portion 64 of the nut 60, and the flange portion 61 can be omitted. In this case, the inner surface of the convex portion 28 of the claw 27 and the outer surface of the upper end portion of the nut 60 may be vertical surfaces, but in order to facilitate the engagement between the convex portion 28 and the concave portion 64, The inner surface of the convex portion 28 and the outer surface of the upper end portion of the nut 60 may be inclined.

  The sleeve 20 does not necessarily need to be constituted by the plurality of sleeve parts 20A and 20B. The sleeve 20 may be a single object.

  The sleeve 20 and the column 11 need not be screwed together. For example, the sleeve 20 and the column 11 may be slidable in the axial direction. The mechanism for adjusting the height of the sleeve 20 and the column 11 is not particularly limited.

DESCRIPTION OF SYMBOLS 10 Leg structure 11 Support | pillar 20 Sleeve 20A, 20B Sleeve component 22 Sleeve body 23 Locking piece 27 Claw (Locking claw)
28 Convex 50 Fixed ring (tubular member)
53 Convex part 60 Nut 61 Flange part (engagement part)

Claims (7)

A sleeve main body having an opening formed at least on one end side, and a plurality of engagement members that extend in the axial direction from the one end side of the sleeve main body and are spaced apart from each other in the circumferential direction, and can be flexibly deformed with the root portion as a fulcrum. A sleeve having a stop, and
A strut inserted into the sleeve so that the amount of insertion can be changed;
The locking piece is attached to the outer side in the radial direction of the locking piece, has an inner surface that sandwiches the locking piece with the outer peripheral surface of the support column, and at least a part of the locking piece is rotated in a predetermined direction, whereby the locking piece A fastening member that bends and deforms radially inward to fasten the locking piece and the support column,
When the locking piece and the support column are clamped on the inner surface of the clamping member, the locking member is engaged with the side surface of the locking piece so as to prevent the clamping member from rotating in the direction opposite to the predetermined direction. Leg structure in which convex parts are formed.   The leg structure according to claim 1, wherein the fastening member is formed in a substantially cylindrical shape.   3. The leg structure according to claim 1, wherein an inner surface of the fastening member is inclined so as to go inward in a radial direction toward a side opposite to the sleeve main body side. The tightening member includes a cylindrical member having an inner peripheral surface on which the convex portion is formed and an outer peripheral surface on which a male screw portion is formed, and an inner screw portion that is engaged with the male screw portion of the cylindrical member. A nut having a peripheral surface,
By screwing the nut into the cylindrical member, the cylindrical member moves to the sleeve body side, and the locking piece and the support column are tightened to the nut via the cylindrical member. The leg part structure according to any one of claims 1 to 3. The sleeve is configured by assembling a plurality of sleeve parts divided in a cross section along the longitudinal direction of the sleeve,
The leg structure according to any one of claims 1 to 4, wherein each sleeve component is provided with at least one locking piece. One end side of the sleeve body is provided with a locking claw positioned radially outward from the locking piece,
The leg part structure according to any one of claims 1 to 5, wherein an engaging portion that engages with the locking claw is formed on an outer surface of the fastening member. A female thread portion is formed on the inner peripheral surface of the sleeve,
On the outer peripheral surface of the support column, a male screw portion that engages with the female screw portion of the sleeve is formed,
The leg part structure according to any one of claims 1 to 6, wherein an insertion amount of the column is adjustable by relatively rotating the column and the sleeve.

Images