JP2016131627A - Furniture leg end structure and furniture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a furniture leg end structure and the furniture with the same in which a set screw screwed from an outer circumferential side of a leg tube is tightened in a leg edge tool attached to the tip part of the leg tube easily and reliably.SOLUTION: A furniture leg end structure includes a set screw 19 screwed to a shaft part 21 inserted in the tip part 16 of a leg tube 15 in a caster receptacle 20 and regulating the coming-off from the tip part 16 of the shaft part 21, and a washer member 30 for forming a seat for the set screw 19 at the outside of the tip part 16. The caster receptacle 20 includes a flange part 25 projecting into a caster 5a side from the tip opening of the leg tube 15. A co-rotation regulating part 35 for engaging the washer member 30 to the flange part 25 and regulating the co-rotation with the set screw 19 of the washer member 30 is provided between the caster receptacle 20 and the washer member 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a leg end structure for a fixture including a leg end device that closes an end of a leg tube constituting the leg of the fixture, and a fixture including the same.

As a fixture belonging to the above technical field, for example, one disclosed in the following Patent Document 1 is known.
The leg end device included in the fixture is attached to the distal end portion of the leg tube extending from the base portion of the leg of the fixture toward the grounding portion (caster) in a state where the shaft portion is inserted and fitted into the distal end portion. The shaft portion of the leg end portion is prevented from coming off from the leg tube by screwing a set screw from a direction orthogonal to the insertion direction.

Japanese Patent No. 3987416

  By the way, if the leg tube is in the shape of a square tube, it is easy to secure the seating surface of the set screw. However, if the leg tube has a curved leg outer surface like a cylindrical leg tube, a washer is required to secure the seating surface of the set screw. It is desirable to use a member. This washer member has a curved alignment surface that aligns with the outer surface of the leg, but if the washer member rotates together with the set screw due to tightening of the set screw, the alignment surface aligns with the outer surface of the leg. Therefore, there is a problem that a gap is generated between them, and it becomes difficult to manage the torque of the set screw.

  The present invention has been made in view of the above-described problems, and in a fixture leg end structure and a fixture provided with the fixture, a set screw that is screwed onto the leg end fitting attached to the tip end portion of the leg tube from the outer peripheral side of the leg tube. The purpose of this is to make it easy and reliable.

In order to achieve the above object, the present invention employs the following means.
That is, the leg end structure for a fixture according to the present invention is inserted through the leg tube extending from the fixture main body toward the grounding portion, and the distal end opening of the leg tube on the grounding portion side in the longitudinal direction of the leg tube from the tip opening. A leg end device attached to the leg tube with the shaft portion inserted into the distal end portion, and penetrating the outer peripheral wall of the distal end portion in a direction intersecting the longitudinal direction of the leg tube Then, a set screw that is screwed into the shaft portion inserted into the tip portion and restricts the shaft portion from coming off from the tip portion and a seating surface for the set screw are formed outside the outer peripheral wall. A washer member, and the leg end tool includes a grounding side protrusion projecting from the tip opening toward the grounding part side, and the washer member is interposed between the leg end tool and the washer member on the grounding side. Engage with a protrusion to restrict the washer member from rotating together with the set screw Comprising a corotation restricting unit that.
According to this configuration, the leg tube can be easily and reliably regulated by the co-rotation restricting portion that engages the washer member with the ground-side protruding portion, together with the set screw of the washer member for the set screw. Even in the case of having a curved outer surface, the torque management of the set screw can be performed easily and reliably.
That is, in a configuration in which the outer peripheral wall has a curved leg outer surface and the washer member has a curved alignment surface that aligns with the leg outer surface, the alignment surface aligns with the leg outer surface when the washer member rotates together with the set screw. Therefore, a gap is generated between them, and the torque management of the set screw becomes difficult. On the other hand, by regulating the co-rotation of the washer member by the co-rotation restricting portion, the alignment state of the washer member with the outer peripheral wall can be easily and reliably maintained, and the torque management of the set screw can be easily and reliably performed.
Here, when molding a leg end tool, it is conceivable that the mold splitting direction is a direction (radial direction) intersecting the longitudinal direction of the leg tube and the leg end tool. A washer member is integrated with the leg end tool. If it is going to be formed, an overhang will occur on the matching surface of the washer member to the curved outer surface of the leg, and it is necessary to take measures such as using a slide mold. Alternatively, it is necessary that the dividing direction is the longitudinal direction of the leg tube and the leg end tool. For this reason, although the subject of increasing the manufacturing cost of a leg end implement or making a leg end implement taper by a drawing taper arises, such a subject does not arise in the present invention. In particular, since the shaft portion inserted into the leg tube is not tapered, it is possible to maintain a robust support state with little play against a moment acting on the caster support due to the ground reaction force.

Moreover, the said leg end part structure for fixtures WHEREIN: The said washer member is good also as a structure provided with the washer outer surface connected in a flat shape with the outer surface of the said ground side protrusion part in the attachment state to the said leg pipe.
According to this configuration, the separate washer member and the grounding side protrusion (leg end tool) are continuously connected to each other, so that the appearance around the set screw is improved, and the unevenness around the set screw is suppressed, which is good. Can be obtained and can be easily cleaned.

Moreover, the said leg end part structure for fixtures WHEREIN: The said grounding side protrusion is good also as a structure formed in the hook shape which covers the front end surface by the side of the said grounding part of the said leg pipe.
According to this configuration, it is possible to close the distal end opening of the leg tube while suppressing exposure of the distal end surface of the leg tube.

Moreover, in the said leg end part structure for furniture, the said co-rotation restriction | limiting part is provided with the convex part and recessed part which are each formed in the opposing part with the other in the said washer member and the earthing | grounding side protrusion, and fit mutually. Good.
According to this configuration, the washer member configured as a separate member from each other by restricting the common rotation of the washer member by fitting the convex portion and the concave portion formed in each of the opposed portions of the washer member and the ground-side protrusion. The relative positional relationship between the leg end devices can be easily and reliably determined, and the appearance appearance can be improved.

Further, in the above-mentioned leg end structure for furniture, the recess is formed in the ground-side protrusion, and opens to the outer peripheral side of the ground-side protrusion in a direction intersecting the longitudinal direction of the leg tube, The shaft portion may be configured such that a screw hole into which the set screw is screwed is formed substantially in parallel with the opening direction of the concave portion toward the outer peripheral side of the ground side protrusion.
According to this configuration, since the concave portion and the screw hole formed in the leg end device are formed substantially parallel to each other, the concave portion and the screw hole can be simultaneously molded without requiring measures such as using a slide mold. It becomes possible, and manufacturing cost can be held down.

In addition, the present invention includes any one of the above-described leg end structures for a fixture, and the leg pipe extends in a state inclined with respect to the floor so that the grounding portion side is lowered in the longitudinal direction. including.
According to this configuration, even when a leg end device is attached to a leg tube that is inclined so that the grounding portion side is lowered, the shaft portion inserted into the leg tube is not tapered in particular. It is possible to maintain a robust support state with little play against the acting moment.

  According to the present invention, in a leg end structure for a fixture and a fixture including the same, it is possible to easily and reliably tighten a set screw that is screwed from the outer peripheral side of the leg tube to a leg end fitting attached to the distal end portion of the leg tube. be able to.

It is a front view of the chair in embodiment of this invention. It is the perspective view which looked at the said chair from the upper right back. It is the perspective view which looked up the caster periphery of the leg tube of the said chair. FIG. 4 is an exploded perspective view of FIG. 3. It is VV sectional drawing of FIG. It is VI-VI sectional drawing of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the directions such as front, rear, left and right are the same as those of a seated person sitting with his back on the back of the chair unless otherwise specified. Further, “front” of the seated person is indicated by an arrow FR in the figure, “upward” of the seated person is indicated by an arrow UP in the figure, and “left side” of the seated person is indicated by an arrow LH in the figure.

<Whole chair>
As shown in FIGS. 1 and 2, the chair (furniture) 1 of the present embodiment includes a leg body 2 placed on the floor surface F, and a seat support body 3 installed at the upper end of the leg body 2. A seat 4 that is supported by the seat support 3 and supports the buttocks of the seated person, and a backrest 12 that is supported by the seat support 3 on the rear side of the seat 4 and supports the back of the seated person. .

  The leg body 2 includes a multi-leg 5 with casters 5a and a pedestal 6 having a gas spring as a lifting mechanism that stands up from the center of the multi-leg 5 and is seat-supported at the upper end of the pedestal 6 The body 3 is attached. The multi-leg 5 is formed by arranging a plurality (five) of leg tubes 15 extending from the pedestal 6 side, which is the base of the leg body 2, toward the caster 5a, which is the grounding portion, in a radial manner when viewed from above. Each leg tube 15 extends in a state of being inclined with respect to the floor surface F so that the grounding portion side is lowered in the longitudinal direction. Here, if the assembly of the pedestal 6, the seat support 3, the seat 4 and the backrest 12 is a chair body (a fixture body), each leg tube 15 extends from the chair body toward the caster 5a.

  The seat support 3 is supported by the upper end of the pedestal 6 of the leg 2, and has a box-like support base 7 in which a lifting / lowering operation mechanism of the pedestal 6 (gas spring) is built, and left and right of the support base 7. A pair of left and right support frames 10 fixed to the support base 7 in a state of penetrating both edges in the front-rear direction, and a front connection frame 11 that connects the front ends of the support frame 10 to each other are provided. The left and right support frames 10 and the front connection frame 11 are formed of a metal pipe material having a circular cross section. The support base 7 is provided with an operation lever 9 for operating the lifting adjustment mechanism so as to protrude rightward.

  The regions extending from the support base 7 of the left and right support frames 10 to the front side are spaced apart so that the top view is substantially parallel, and the front edge is curved toward the front upper side of the seat 4. The extending rod 10a is configured to extend. Further, in the region extending from the support base 7 of the left and right support frames 10 to the rear side, the mutual separation width increases toward the rear side of the seat 4 and rises upward from the vicinity of the rear end portion of the seat 4. This constitutes the backrest support collar 10b.

  The left and right edges of the back plate 12a of the back 12 integrally molded with resin are supported in the fitted state on the back support 10b. The backrest 12 connects the left and right backrest support rods 10b and forms a curved receiving surface that protrudes rearward between the left and right backrest support rods 10b. A support arm 13 connected to the left and right rear edge portions of the seat 4 is extended at a position below the fitting portion of the back plate 12a in the left and right back support rods 10b. The support arm 13 supports the side of the seat 4 via a shaft extending in the left-right direction.

  The front connection frame 11 is welded to the front upper ends of the left and right extension rods 10 a of the seat support 3 to connect the extension rods 10 a to each other. The front connection frame 11 contacts the lower surface of the front edge portion of the seat 4 and directly receives the load of the seat 4.

The seat 4 is a substantially rectangular seat frame (not shown) made of a metal pipe material, a lower cover 4a that covers the lower surface side of the seat frame, a seat surface member 4b that covers the upper surface side of the seat frame, It has.
The seat frame is a metal strength member and forms the skeleton of the seat 4. The lower cover 4a is a resin-made plate-like member close to the support structure, and forms a lower layer of the seat 4. The seat surface member 4b forms an upper layer of the seat 4, and includes a cushion material such as urethane supported by the substrate, and a sheet skin material covering the upper side of the cushion material.

At the left and right rear edge portions of the seat frame, a connecting arm 4c protruding upward is projected. The connecting arm 4c is connected and fixed to the left and right support arms 13 on the seat support 3 side by bolts or the like extending in the left-right direction. An arm cover 4d that covers the outside of the connecting arm 4c of the seat frame is integrally formed at the left and right rear edges of the lower cover 4a.
The front edge of the seat 4 is placed on a connecting rod on the seat support 3 side, and is fixed to the connecting rod by screws or the like.
Therefore, the front side of the seat 4 is supported by the connecting rod of the seat support 3, and the rear side is supported by the left and right support arms 13 of the seat support 3.

  The backrest 12 includes a back plate 12a. The back plate 12a is a plate-like member that is curved so that the central portion bulges rearward along the back of the seated person. The back plate 12a is formed of a resin having rigidity capable of supporting a seated person from behind and receiving a load from the seated person. At both left and right ends of the back plate 12a, there are provided insertion portions into which the backrest support rod 10b can be inserted from below. The back plate 12a is fixed to the support structure by inserting a back support rod 10b into these insertion portions. A large number of straight or curved long holes (through holes) are formed in the back plate 12a.

<Caster support>
As shown in FIGS. 3 to 6, each leg tube 15 of the manifold leg 5 is formed of a cylindrical steel pipe that has an elliptical cross section and extends linearly. A caster receiving tool (leg end tool) 20 that supports the caster 5a is attached to the distal end portion 16 of each leg tube 15 on the grounding portion side (caster 5a side). The caster receiver 20 is, for example, an integrally formed resin molded product, and includes a shaft portion 21 that is inserted into the distal end portion 16 of the leg tube 15 from the distal end opening 16 a. The shaft portion 21 is inserted into the distal end portion 16. The caster holder 20 is attached to the leg tube 15 in the inserted state.

  The caster receiving member 20 includes a shaft portion 21 that is inserted into the distal end portion 16 from the distal end opening 16a of the leg tube 15 that is inclined with respect to the floor surface F, and the caster 5a that is integrally formed with the shaft portion 21 from the distal end opening 16a. And a flange 25 protruding to the side. Reference sign C1 in the drawing indicates a central axis (an axis passing through the intersection of a major axis and a minor axis having an elliptical cross section, hereinafter simply referred to as an axis) along the longitudinal direction of the leg tube 15 (and the shaft portion 21).

  The shaft portion 21 includes a long axis wall 21a parallel to the long axis of the leg tube 15 having an elliptical cross section and a short axis wall 21b parallel to the short axis of the leg tube 15 having an elliptical cross section. A plurality of groove portions 21c parallel to the axial direction (direction along the axis C1) are formed on the outer periphery of the shaft portion 21. The long axis wall 21a is provided as a single unit so as to pass through the axis C1, and the short axis wall 21b is provided as a pair so as to sandwich the axis C1 while avoiding the axis C1. A portion for forming the screw hole 21d to which the set screw 19 is screwed is a cylindrical portion 21e centered on the screw hole 21d, and the width in the short axis direction is partially increased as compared with the long axis wall 21a.

  The shaft portion 21 is fitted into the distal end portion 16 of the leg tube 15 on the caster 5a side, so that the caster support 20 can be attached to the leg tube 15. The shaft portion 21 has a sufficient length in the axial direction such that the shaft portion 21 does not rattle even when the ground reaction force is input to the flange portion 25 from the caster 5a. Since the shaft portion 21 is inserted by sliding the end edges of the long shaft wall 21a and the short shaft wall 21b, the frictional resistance when being inserted into the leg tube 15 is small, and the attaching / detaching operation to the leg tube 15 is easy. To. By making the shaft portion 21 long, the caster support 20 is stably held by the leg tube 15 even when the inclination angle of the leg tube 15 is large and a large load is applied to the shaft portion 21, and rattling or the like is effective. Is prevented.

  A thick block-like flange portion 25 having a diameter larger than that of the shaft portion 21 is integrally formed on the caster receiving device 20 on the caster 5 a side of the shaft portion 21. The flange portion 25 has a mounting hole 25a to which the vertical support shaft 5b of the caster 5a is fitted and attached. The attachment hole 25a is provided so as to open downward at the lower end of the flange portion 25 and to protrude upward to the end portion of the shaft portion 21 on the flange portion 25 side. A bulging portion 25b that forms an upper portion of the attachment hole 25a is provided at an end portion of the shaft portion 21 on the flange portion 25 side.

The periphery of the lower end opening of the attachment hole 25a in the flange portion 25 is a caster attachment surface 25c that is orthogonal to the attachment hole 25a and parallel (horizontal) to the floor surface F.
Here, the distal end surface 16b of the leg tube 15 is formed along an inclined surface K1 that is inclined with respect to a plane orthogonal to the axis C1 so that the lower side in the major axis direction of the elliptical cross section is located on the proximal end side. . The flange portion 25 forms an opposing surface 25d that is inclined so as to be aligned with the inclination of the distal end surface 16b of the leg tube 15. The opposing surface 25d faces and abuts the distal end surface 16b of the leg tube 15 so that the distal end surface 16b of the leg tube 15 is covered by the flange 25. The collar portion 25 is provided with a slightly larger diameter than the leg tube 15.

  As for the collar part 25, when the front end surface 16b of the leg tube 15 is inclined as described above, the lower side facing the floor surface F becomes wider in the axial direction. For this reason, it becomes easy to secure the caster mounting surface 25c, and it becomes easy to provide the below-mentioned co-rotation restricting portion 35 on the leg tube 15 side of the caster mounting surface 25c.

  A set screw 19 that passes through the outer peripheral wall 16 c in a direction orthogonal to the axial direction and is screwed into a screw hole 21 d of the shaft portion 21 inserted into the distal end portion 16 is attached to the distal end portion 16 of the leg tube 15. . The set screw 19 regulates the removal of the shaft portion 21 from the distal end portion 16, and thereby regulates the detachment of the caster receiver 20 from the leg tube 15. An insertion hole 16 d for a set screw 19 is formed below the distal end portion 16 of the leg tube 15.

<Washer member>
A washer member 30 that forms a seating surface for the set screw 19 on the lower outer periphery of the outer peripheral wall 16 c is attached to the lower side of the distal end portion 16 of the leg tube 15. The washer member 30 is, for example, a resin molded product integrally formed of the same resin material as the caster receiver 20, and has a substantially rectangular shape having a washer side face 30b parallel to the axis C1 when viewed from the axial direction of the set screw 19. None, the set screw 19 is formed in a flat shape with a reduced thickness in the axial direction.

  The washer member 30 forms a curved alignment surface 31 that aligns with the curved outer peripheral surface (leg outer surface 17) on the lower side of the outer peripheral wall 16c when attached to the leg tube 15. The washer member 30 is disposed on the opposite side of the alignment surface 31 and is attached to the leg tube 15 in a state of being attached to the leg tube 15 on the side of the leg tube 15 of the caster mounting surface 25c of the collar portion 25. Form. At the center of the washer member 30, an insertion hole 30c for the set screw 19 is formed, and a seat 30d that sinks the head of the set screw 19 with respect to the washer lower surface 30a is formed.

  The washer member 30 aligns the alignment surface 31 with the outer surface 17 of the leg, so that the co-rotation when the set screw 19 is tightened is suppressed. However, when the washer member 30 rotates together with the set screw 19, the alignment surface 31 Are not aligned with the leg outer surface 17 and a gap is formed between them, which makes it difficult to manage the torque of the set screw 19. Therefore, in the present embodiment, the co-rotation regulating portion 35 that regulates the co-rotation of the washer member 30 with the set screw 19 by engaging the washer member 30 with the collar portion 25 between the collar portion 25 and the washer member 30. It has. Thereby, the state of alignment of the washer member 30 with the outer peripheral wall 16c becomes easy and reliable, and the torque management of the set screw 19 becomes easy and reliable.

  The co-rotation restricting portion 35 is formed in a portion facing the flange portion 25 in the axial direction of the washer member 30 and protrudes toward the flange portion 25 side, and faces the washer member 30 in the axial direction of the flange portion 25. And a concave portion 35b that is formed in the portion and into which the convex portion 35a is fitted.

The convex portion 35a is formed in a substantially rectangular shape in which the width in the same direction is narrower than the width in the direction orthogonal to the axis C1 of the washer member 30 when viewed from the axial direction of the set screw 19.
The concave portion 35b is formed in a substantially rectangular shape that matches the outer shape of the convex portion 35a when viewed from the axial direction of the set screw 19. The concave portion 35b opens to the washer member 30 side, and also opens to the lower outer peripheral side of the flange 25, and the convex portion 35a can be fitted from either the washer member 30 side or the lower outer peripheral side.

  A rectangular portion 26 formed to be continuous with the washer member 30 is provided at the lower portion of the flange portion 25. The rectangular portion 26 forms the flange lower surface 26a continuous with the washer lower surface 30a in a flat shape, and forms the flange side surface 26b continuous with the washer side surfaces 30b on both sides of the washer lower surface 30a. Thereby, the washer member 30 and the collar part 25 (caster receiving tool 20) which are separate from each other are provided so as to be continuously connected.

  An inner peripheral surface 35 d that forms a rectangular shape as viewed from the axial direction of the set screw 19 in the recess 35 b is formed substantially parallel to the axial direction of the screw hole 21 d of the shaft portion 21. As a result, when the dividing direction of the caster holder 20 is the direction (radial direction) intersecting with the longitudinal direction of the leg tube 15, the recess 35b and the screw hole 21d Can be molded simultaneously. Reference numeral 35c in the drawing denotes an outer peripheral surface forming a rectangular shape as viewed from the axial direction of the set screw 19 in the convex portion 35a.

<Action>
Next, the operation will be described.
When the caster receiver 20 is attached to the leg tube 15, first, the shaft portion 21 of the caster receiver 20 is inserted and fitted into the distal end portion 16 of the leg tube 15 with the axis C <b> 1 aligned. The shaft portion 21 has a length in the axial direction so that it can withstand a large load, but a plurality of groove portions 21c are formed on the outer periphery of the shaft portion 21 to reduce the frictional resistance when being inserted into the leg tube 15. Therefore, it is possible to easily attach the caster receiver 20 to the leg tube 15 while allowing the caster receiver 20 to be firmly held on the leg tube 15.

The cylindrical leg outer surface 17 is formed by using the washer member 30 that forms the seating surface of the set screw 19 when the set screw 19 is screwed to restrict the shaft portion 21 from coming off from the tip end portion 16. The set screw 19 can be stably tightened with respect to the leg tube 15 to be performed.
At this time, between the washer member 30 and the flange portion 25, by providing the common rotation restricting portion 35 that engages the washer member 30 with the flange portion 25 and restricts the common rotation of the washer member 30 with the set screw 19. The co-rotation of the washer member 30 with the set screw 19 is easily and reliably regulated. For this reason, even when the leg tube 15 has the leg outer surface 17 having a curved shape, the torque management of the set screw 19 can be easily and reliably performed.

  Here, since the leg tube 15 has a substantially cylindrical shape and is inclined so that the grounding portion (caster 5a) side is lowered, the shaft portion 21 of the caster receiver 20 also has a shape inclined accordingly. In such a structure, since the moment acting on the shaft portion 21 increases due to the inclination of the leg tube 15, the shaft portion 21 needs to have a length. When trying to mold the caster holder 20 in the longitudinal direction, there is a concern that the shaft portion 21 is tapered to move the mold, resulting in a tapered shape and insufficient moment support. Is done. Therefore, it is desirable to perform molding in which the mold is moved in the width direction (radial direction) orthogonal to the longitudinal direction of the shaft portion 21.

  By the way, when molding is performed by moving the mold in the width direction of the shaft portion 21, if the washer member 30 is formed integrally with the caster receiving portion corresponding to the substantially cylindrical shape of the leg tube 15, the alignment surface to the leg outer surface 17. It becomes difficult to mold the part forming 31. That is, an overhang occurs at the alignment surface 31 of the washer member 30 with the cylindrical leg outer surface 17, and the mold cannot be moved linearly in the width direction of the shaft portion 21, and the periphery of the washer member 30 is molded. Therefore, it is necessary to take measures such as providing a slide mold. However, if a small slide mold is provided adjacent to the mold that moves in the width direction of the shaft portion 21, it becomes difficult to control the mold, and the number of molding processes increases, leading to an increase in manufacturing cost. . On the other hand, in the present embodiment in which the washer member 30 is provided separately from the caster receiver 20, the above-described problem does not occur.

  In the present embodiment, the appearance of the periphery of the set screw 19 is improved by forming an appearance in which the separate washer member 30 and the caster receiver 20 are continuously connected to each other. Further, the washer member 30 may be provided with a seating 30d that sinks the head of the set screw 19, so that unevenness around the set screw 19 is suppressed, and a good tactile sensation and easy cleaning are obtained. Moreover, since the flange portion 25 is formed so as to face the distal end surface 16b of the leg tube 15 and cover the distal end surface 16b, the distal end opening 16a of the leg tube 15 is opened after suppressing the exposure and the step of the distal end surface 16b. Can be occluded.

As described above, according to the present embodiment, the washer member 30 is engaged with the flange portion 25 between the caster receiver 20 and the washer member 30 to restrict the rotation of the washer member 30 with the set screw 19. By providing the co-rotation restricting portion 35, the co-rotation restricting portion 35 that engages the washer member 30 with the flange portion 25 can be easily and reliably co-rotated with the set screw 19 of the washer member 30 for the set screw 19. Even when the leg tube 15 has the curved leg outer surface 17, the torque management of the set screw 19 can be easily and reliably performed.
In addition, the washer member 30 includes a washer outer surface (washer lower surface 30a, washer side surface 30b) continuous with the outer surface of the collar portion 25 (the collar lower surface 26a, the collar side surface 26b) in the attached state to the leg tube 15. Thus, the washer member 30 and the collar 25 (caster holder 20), which are separate from each other, form an appearance that is continuously connected, improves the appearance around the set screw 19 and suppresses the unevenness around the set screw 19, Good tactile sensation and easy cleaning can be obtained.

  In addition, this invention is not restricted to the said embodiment, For example, the structure by which the co-rotation control part provided the recessed part in the washer member 30, and the convex part in the collar part 25 may be sufficient. Instead of the flange portion 25, a configuration may be provided in which a grounding portion side protrusion that does not increase in diameter with respect to the shaft portion 21 is provided. The structure which provided the fixed leg instead of the caster 5a may be sufficient. Although an example in which the present invention is applied to the legs of an office chair has been described, the same structure can be applied to the legs of furniture such as desks, shelves, and carts.

1 Chair (Furniture)
5a Caster (grounding part)
15 leg tube 16 distal end portion 16a distal end opening 16b distal end surface 16c outer peripheral wall 19 set screw 20 caster receiving device (leg end device)
21 Shaft part 21d Screw hole 25 ridge part (ground side protrusion)
26a Bottom of collar (outside)
26b Saddle side (outside)
30 Washer member 30a Washer bottom surface (washer outer surface)
30b Washer side (washer outer surface)
35 Co-rotation restricting part 35a Convex part 35b Concave part F Floor surface

Claims (6)

A leg tube extending from the main body to the grounding part;
A leg portion that has a shaft portion that is inserted from a distal end opening into a distal end portion of the leg tube in the longitudinal direction of the leg tube in the longitudinal direction, and is attached to the leg tube in a state in which the shaft portion is inserted into the distal end portion. End tools,
A stopper that passes through the outer peripheral wall of the distal end portion in a direction intersecting the longitudinal direction of the leg tube, and is screwed into the shaft portion inserted into the distal end portion to restrict the shaft portion from coming off from the distal end portion. Screws,
A washer member that forms a seating surface for the set screw on the outside of the outer peripheral wall,
The leg end device includes a grounding side protrusion that protrudes from the tip opening toward the grounding part,
Between the leg end tool and the washer member, a co-rotation restricting portion for restricting the co-rotation of the washer member with the set screw by engaging the washer member with the ground side protrusion is provided. Leg end structure for furniture.   The said washer member is provided with the washer leg end part structure of Claim 1 provided with the washer outer surface connected in a flat shape with the outer surface of the said ground side protrusion part in the attachment state to the said leg pipe.   The said leg | foot side protrusion is formed in the shape of a bowl which covers the front end surface by the side of the said earthing | grounding part of the said leg pipe, The leg end part structure for furniture | guidance according to claim 1 or 2.   4. The co-rotation restricting portion includes a convex portion and a concave portion that are respectively formed at portions of the washer member and the ground-side protruding portion that face each other and are fitted to each other. The leg end part structure for furniture as described in the item. The concave portion is formed on the ground-side projection, and opens to the outer peripheral side of the ground-side projection in a direction intersecting with the longitudinal direction of the leg tube.
The screw hole for screwing the set screw into the shaft portion is formed substantially in parallel with an opening direction to the outer peripheral side of the ground-side protrusion in the recess. Leg end structure for furniture. A leg end structure for a fixture according to any one of claims 1 to 5,
The said leg pipe extends in the state inclined with respect to the floor surface so that the said grounding part side may become low in the longitudinal direction.

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