Furniture with top plate

Abstract

To provide furniture with a top plate capable of miniaturizing a periphery of a pivot mechanism while improving a degree of freedom of design.SOLUTION: Furniture with a top plate includes a pivot mechanism provided between a top plate and a support structure, and allowing the top panel to rotate relative to the support structure about an axis along a front-rear direction between a use position in which a work surface faces upward and a non-use position in which the work surface faces a first side in the front-rear direction. A contact portion having a contact surface with which a work surface of another piece of furniture with a top plate comes into contact in a state where the furniture with the top plate and the other furniture with the top plate are stacked in the front-rear direction is provided in a portion located on the first side closer to the center of the top plate in the left-right direction relative to the pivot mechanism.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a fixture with a top. [Background technology]

[0002] A known type of furniture with a tabletop includes a tabletop with a work surface, a pair of legs supporting both the left and right ends of the tabletop from below, and a connecting portion provided between the legs and the tabletop that allows the tabletop to rotate relative to the legs between a use position where the work surface faces upward and a non-use position where the work surface faces backward (see, for example, Patent Document 1 below). With this type of furniture with a tabletop, multiple pieces of furniture with tabletops can be stacked in the front-to-back direction (so-called nesting) with the tabletops in the non-use position, thereby saving space during storage.

[0003] In Patent Document 1, the connecting portion is provided with a blocking block against which the work surface of another piece of furniture with a top that is nested from the front of the furniture with a top abuts. The blocking block is attached facing forward at the connecting portion. Also, in Patent Document 1, the tabletop is provided with support portions that surround the blocking block from both the left and right sides when the tabletop is in use and expose the blocking block when it is not in use. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-139662 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned prior art, the blocking block is provided in the connecting portion itself (within the dimensional range of the connecting portion in the left-right direction). Therefore, the shape and position of the blocking block depend on the shape and position of the connecting portion and the support portion. Therefore, in the prior art, there is still room for improvement in terms of increasing design freedom. Furthermore, in the prior art, since the blocking block is provided in the connecting portion itself, there is a possibility that the mechanism around the connecting portion, including the support portion and the blocking block, will become large.

[0006] The present invention provides a furniture unit with a top that allows for improved design freedom and allows for the area around the pivot mechanism to be made smaller. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention employs the following aspects. (1) One aspect of the present invention provides a fixture with a top plate comprising: a top plate having a work surface; a support structure supporting the top plate from below; and a pivot mechanism disposed between the top plate and the support structure, which allows the top plate to rotate relative to the support structure about an axis extending in the left-right direction between a use position in which the work surface faces upward and a non-use position in which the work surface faces a first side in the front-to-back direction. The fixture with a top plate and another fixture with a top plate located on a second side in the front-to-back direction relative to the fixture with a top plate are configured to be stacked in the front-to-back direction when their respective top plates are in the non-use position. A portion of the fixture with a top plate located on the first side, closer to the center of the fixture with a top plate in the left-to-right direction, relative to the pivot mechanism is provided with an abutment having an abutment surface against which the work surface of the other fixture with a top plate abuts when the fixture with a top plate and the other fixture with a top plate are stacked in the front-to-back direction.

[0008] According to this aspect, since the abutment portion is provided at a position offset to the first side in the left-right direction relative to the pivot mechanism, the position and shape of the abutment portion are less dependent on the shape and position of the pivot mechanism than in the conventional case where the blocking block is provided within the left-right dimensional range of the connecting portion. As a result, design freedom can be improved. Furthermore, since the abutment portion is provided at a position offset to the first side in the left-right direction relative to the pivot mechanism, it is possible to miniaturize the mechanisms around the pivot mechanism.

[0009] (2) In the fixture with a tabletop according to the above aspect (1), the support structure has a base extending in the vertical direction and having a front-to-back dimension smaller than the front-to-back dimension of the tabletop in the use position, and the bases are preferably arranged in pairs spaced apart in the left-to-right direction, and the pivot mechanism is preferably arranged above the bases in a position where at least a portion of the pivot mechanism overlaps with the bases in a plan view. According to this aspect, since the pivot mechanism is positioned so as to overlap with the leg pillars in a planar view, even if an abutment portion is provided on the first side in the left-right direction of the pivot mechanism, it is easy to ensure a space for the lower legs formed between the pair of leg pillars below the tabletop.

[0010] (3) In the fixture with a tabletop according to the above aspect (2), it is preferable that the first edge of the pivot mechanism in the left-right direction is located at the same position in the left-right direction as the first edge of the leg column in the left-right direction, or on the second side in the left-right direction. According to this aspect, even if the pivot mechanism is provided with first contact portions in the left-right direction, it is easy to ensure a space for the lower legs formed between the pair of leg columns below the tabletop.

[0011] (4) In a fixture with a tabletop according to any one of the above aspects (1) to (3), it is preferable that the abutment portion is connected to the tabletop in a state in which it can rotate integrally with the tabletop, and that the abutment surface is located on a first side in the fore-and-aft direction when the tabletop is in the use position compared to when the tabletop is in the non-use position. According to this aspect, when the tabletop is in the use position, interference between the lower limbs of a user who is inserted into the space below the tabletop from the second side in the front-to-back direction of the tabletop-equipped fixture and the abutment portion can be avoided.

[0012] (5) In the fixture with a tabletop according to the above aspect (4), the support structure preferably has a base extending in the vertical direction and having a front-to-back dimension smaller than the front-to-back dimension of the tabletop when in the use position, and the abutment surface is preferably positioned within the dimensional range of the base in the front-to-back direction when the tabletop is in the use position. According to this aspect, when the tabletop is in the use position, the amount of protrusion of the abutment portion toward the second side in the front-to-rear direction relative to the leg column can be reduced, thereby preventing interference between the abutment portion and the lower limbs of a user who inserts the tabletop-equipped furniture fixture from the second side in the front-to-rear direction into the space below the tabletop.

[0013] (6) In the fixture with a tabletop according to the above-mentioned (4) or (5), it is preferable that a partition wall be provided in the portion of the tabletop located between the pivot mechanism and the abutment portion in the left-right direction, separating the pivot mechanism from the abutment portion. According to this aspect, for example, when the top plate moves between the use position and the non-use position, interference between the pivot mechanism and the abutment portion can be suppressed.

[0014] (7) In the fixture with a tabletop according to any of the above (6) aspects, it is preferable that the abutment portion has a fixed piece fixed to the partition portion, facing the partition portion in the left-right direction. According to this aspect, the fixing piece and the partition wall portion can be fixed facing each other, so that the abutting portion can be easily and stably fixed to the partition wall portion. [Effects of the Invention]

[0015] According to each of the above aspects, it is possible to improve the degree of freedom in design and also to reduce the size of the area around the pivot mechanism. [Brief explanation of the drawings]

[0016] [Figure 1]1 is a perspective view of a fixture with a top plate according to a first embodiment, showing the top plate in a use position. FIG. [Figure 2] 1 is a perspective view of a fixture with a top plate according to a first embodiment, showing the state in which the top plate is in an unused position. [Figure 3] 3 is a cross-sectional view corresponding to line III-III in FIG. 1, showing the caster unit in a non-traveling position. FIG. [Figure 4] FIG. 4 is a cross-sectional view corresponding to FIG. 3, showing the caster unit in a movable position. [Figure 5] FIG. 2 is an enlarged perspective view of the fixture with a top plate according to the first embodiment. [Figure 6] FIG. 2 is an enlarged oblique view of the furniture with a top plate according to the first embodiment with the shielding mechanism and the like removed. [Figure 7] FIG. 7 is a cross-sectional view corresponding to line VII-VII in FIG. 5. [Figure 8] FIG. 8 is a cross-sectional view corresponding to line VIII-VIII in FIG. 5. [Figure 9] FIG. 6 is a cross-sectional view corresponding to line IX-IX in FIG. 5. [Figure 10] FIG. 2 is an exploded perspective view of the shielding mechanism according to the first embodiment. [Figure 11] FIG. 2 is an enlarged perspective view of the fixture with a top plate according to the first embodiment, viewed from below. [Figure 12] This is a cross-sectional view of the area around the tabletop unit when multiple tabletop-equipped fixtures are nested. [Figure 13] FIG. 10 is an explanatory diagram of the operation of a fixture with a tabletop to explain the collective switching mode. [Figure 14] FIG. 10 is an explanatory diagram of the operation of a fixture with a tabletop to explain the collective switching mode. [Figure 15] FIG. 10 is an explanatory diagram of the operation of a fixture with a tabletop to explain the collective switching mode. [Figure 16] This is an enlarged oblique view of a fixture with a top, showing the top in an unused position. [Figure 17] FIG. 10 is an explanatory diagram of the operation of a display unit with a tabletop to explain the single switching mode. [Figure 18] FIG. 10 is a cross-sectional view of a fixture with a top plate according to a second embodiment. [Figure 19] FIG. 10 is a cross-sectional view of a plurality of tabletop-equipped fixtures nested together in the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Next, an embodiment of the present invention will be described with reference to the drawings. In the embodiments and modifications described below, corresponding components may be designated by the same reference numerals, and a description thereof may be omitted. In the following description, expressions indicating relative or absolute arrangements, such as "parallel," "orthogonal," "center," and "coaxial," not only strictly refer to such arrangements, but also refer to a state in which there is a relative displacement with an angle or distance to the extent that tolerances or the same function are obtained. In this embodiment, "facing" does not only refer to a case in which the orthogonal directions (normal directions) of two surfaces are aligned with each other, but also includes a case in which the orthogonal directions intersect with each other.

[0018] <Fixture with tabletop 1> Fig. 1 is a perspective view of a tabletop-equipped fixture 1 with the tabletop 3 in a use position Q1. Fig. 2 is a perspective view of a tabletop-equipped fixture 1 with the tabletop 3 in a non-use position Q2, showing multiple tabletop-equipped fixtures 1 nested together. The tabletop-equipped furniture 1 shown in Figures 1 and 2 is a desk device installed in various facilities (for example, offices, halls, public facilities, etc.). Tabletop-equipped furniture 1 can move on a floor surface F via casters 2, and the position of the tabletop 3 can be changed depending on whether it is in use or not (so-called flap type). In the following explanation, the direction perpendicular to the floor surface F is defined as the up-down direction (arrow UP indicates the upside), and the two directions perpendicular to the up-down direction are defined as the front-to-back direction (arrow FR indicates the front side) and the left-to-right direction (arrow LH indicates the left side), respectively.

[0019] The fixture with a tabletop 1 comprises a support structure 10, a tabletop unit 11, an operating mechanism 12, and an abutment portion 13. <Support structure 10> The support structure 10 is placed on a floor surface F. The support structure 10 includes a pair of leg units 15 spaced apart in the left-right direction, and a connecting portion 16 that connects the pair of leg units 15. Each leg unit 15 has a symmetrical configuration. Therefore, in the following explanation, the configuration of one leg unit 15 will be explained as an example.

[0020] <Leg Unit 15> Fig. 3 is a cross-sectional view corresponding to line III-III in Fig. 1, showing the caster unit 15b in a non-movable state P1. Fig. 4 is a cross-sectional view corresponding to Fig. 3, showing the caster unit 15b in a moveable state P2. As shown in FIGS. 3 and 4, the leg unit 15 includes a leg body 15a and a caster unit 15b.

[0021] The leg body 15a is formed in an L-shape when viewed from the left and right (side view). Specifically, the leg body 15a includes a base leg 21 and a leg pillar 22. The base leg 21 extends in the front-rear direction and is formed in a box shape that is open downward. Specifically, the base leg 21 includes a base body 23, a front cap 24, and a rear cap 25.

[0022] The base body 23 is formed, for example, by press-forming a metal plate. The base body 23 is formed in a U-shape that opens downward when viewed from the front-to-rear direction, and is open on both sides in the front-to-rear direction. A front stay 23a is provided at the front end within the base body 23. The front stay 23a is formed in an L-shape when viewed from the side. The front stay 23a has an upper edge and both left and right edges joined to the inner surface of the base body 23. The front stay 23a is provided with an adjuster 26 that can be raised and lowered in the vertical direction. A rear stay 23b is provided at the rear end within the base body 23. The rear stay 23b is formed in an L-shape when viewed from the side. The rear stay 23b has an upper edge and both left and right edges joined to the inner surface of the base body 23.

[0023] As shown in Fig. 3, the front cap 24 is attached to the front end of the base body 23. The front cap 24 is made of an elastically deformable material, such as a resin material. The front cap 24 is fitted into the base body 23 through a front opening of the base body 23, and together with the base body 23, forms the outer shape of the base leg 21. The front cap 24 is fixed to the front stay 23a within the base body 23 via screws or the like.

[0024] The rear cap 25 is attached to the rear end of the base body 23. Like the front cap 24, the rear cap 25 is made of, for example, a resin material. The rear cap 25 is fitted into the base body 23 through a rear opening of the base body 23, and together with the base body 23, forms the outer shape of the base leg 21. The rear cap 25 is fixed to the rear stay 23b with screws or the like.

[0025] As shown in FIGS. 1 and 2, side buffer portions 30 are provided on the outer surfaces of both side wall portions of the base body 23 that face each other in the left-right direction.

[0026] The leg pillar 22 is formed in a rectangular cylindrical shape. The leg pillar 22 extends upward from the rear end of the base leg 21. That is, the leg pillar 22 is open on both sides in the extending direction (vertical direction). As shown in FIG. 3, the leg pillar 22 gradually extends forward as it extends upward. The interior of the leg pillar 22 communicates with the interior of the base leg 21 through a through-hole 23c formed in the base main body 23. The left-right dimension of the leg pillar 22 is smaller than the left-right dimension of the base main body 23 (base leg 21). Therefore, the base leg 21 protrudes on both left-right sides relative to the leg pillar 22. Furthermore, the front-rear dimension of the leg pillar 22 is smaller than the front-rear dimension of the tabletop 3. Therefore, the tabletop 3 protrudes on both front-rear sides relative to the leg pillar 22.

[0027] Caster unit 15b is housed within base leg 21 so as to be able to move up and down. Caster unit 15b includes caster stays 36 and casters 2. Caster stays 36 extend in the front-to-rear direction within base leg 21. Casters 2 are provided at both ends of caster stays 36 in the front-to-rear direction.

[0028] The caster unit 15b transitions between a non-runnable state P1 and a runnable state P2 through the operation of the operating mechanism 12. In the non-runnable state P1, the lower ends of the casters 2 are positioned at the same level as the lower surfaces of the rear caps 25 and the adjusters 26, or are positioned higher than the lower surfaces of the rear caps 25 and the adjusters 26. In other words, when the caster units 15b are in the non-runnable state P1, the tabletop-equipped furniture 1 touches the floor F via at least the rear caps 25 and the adjusters 26. On the other hand, in the runnable state P2, each caster 2 protrudes downward from the rear caps 25 and the adjusters 26, so that each caster 2 touches the floor F. In other words, when the caster units 15b are in the runnable state P2, the tabletop-equipped furniture 1 can move on the floor F via the casters 2. The following explanation will be based on the state in which the caster units 15b are in the non-runnable state P1.

[0029] <Connection part 16> Fig. 5 is an enlarged perspective view of the tabletop-equipped fixture 1. Fig. 6 is an enlarged perspective view of the tabletop-equipped fixture 1 with the shielding mechanism 120 and the like removed. Fig. 7 is a cross-sectional view corresponding to line VII-VII in Fig. 5. As shown in FIGS. 5 to 7, the connecting portion 16 includes a connecting plate 41 and a connecting beam . The connecting plate 41 is formed in a plate shape with its thickness extending in the left-right direction. A connecting plate 41 is provided for each leg 22. Specifically, the lower part of the connecting plate 41 is attached to each leg 22 in a state where it is overlapped with the inner wall part of the leg 22. The upper part of the connecting plate 41 protrudes upward from the leg 22.

[0030] 6, a rotation restricting portion 41a and a return restricting portion 41b are formed in the center in the front-rear direction on the upper part of the connecting plate 41. The rotation restricting portion 41a protrudes outward in the left-right direction from the connecting plate 41. The return restricting portion 41b protrudes outward in the left-right direction from a portion of the connecting plate 41 that is located above the rotation restricting portion 41a. A receiving portion 41c is formed in a portion of the connecting plate 41 that is positioned forward of the return restricting portion 41b. The receiving portion 41c is a recess that opens on the upper edge of the connecting plate 41.

[0031] The connecting beam 42 connects the upper portions of the connecting plates 41 provided on each leg 22. The connecting beam 42 is fixed by welding or the like to a portion of the upper portion of the connecting plate 41 that is located rearward of the receiving portion 41c.

[0032] <Top Unit 11> 1 and 2, the top board unit 11 is supported from below by a support structure 10. The top board unit 11 includes a top board 3, a bracket 51, a shelf unit 52, and a bearing member 53. The top plate 3 is formed in a rectangular shape with the longitudinal direction extending in the left-right direction when viewed from above (in a plan view). In the following explanation, the state in which the work surface 3a of the top plate 3 faces upward (usage position Q1) will be described as a reference.

[0033] The brackets 51 are fixed to both left and right ends of the rear surface 3b (the surface facing away from the work surface 3a) of the top board 3. Therefore, in the following explanation, the configuration of the bracket 51 will be explained using one (left side) bracket 51 as an example.

[0034] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 5, 7, and 8, bracket 51 is formed in a U-shape that opens downward when viewed from the front. Specifically, bracket 51 includes a top wall portion 51a, an inner wall portion 51b, and an outer wall portion 51c. The top wall portion 51a is fixed to the rear surface 3b of the top plate 3 at a position that overlaps the upper end of the leg column 22 in a plan view. The inner wall portion 51b extends downward from the inner edge in the left-right direction of the top wall portion 51a. The outer wall portion 51c extends downward from the outer edge in the left-right direction of the top wall portion 51a.

[0035] As shown in FIG. 8, the outer wall portion 51c is connected to the connecting plate 41 via a connecting shaft 50. The connecting shaft 50 is, for example, a bolt and a nut. The tabletop unit 11 is supported by the support structure 10 so as to be rotatable about an axis O1 of the connecting shaft 50 along the left-right direction. Specifically, the tabletop unit 11 rotates about the axis O1 between a use position Q1 (see FIG. 1) in which the working surface 3a of the tabletop 3 faces upward and a non-use position Q2 (see FIG. 2) in which the working surface 3a of the tabletop 3 faces backward (first side in the front-to-back direction). Note that the use position Q1 and the non-use position Q2 may be defined such that the front-to-back component of the normal direction of the working surface 3a in the non-use position Q2 is larger than that in the use position Q1. In this embodiment, the tabletop 3 in the use position Q1 is positioned with the working surface 3a parallel to the floor surface F. On the other hand, in the unused position Q2, the tabletop 3 is disposed in a state in which the work surface 3a intersects with the floor surface F at an acute angle.

[0036] As shown in Fig. 1, shelf unit 52 is suspended from the rear surface 3b of top plate 3 in a portion of the space below top plate 3 that is located forward of connecting beam 42. Shelf unit 52 is used to place items and the like in the space below top plate 3. Shelf unit 52 includes shelf supports 55 and a placement portion 56. The shelf supports 55 are fixed to both left and right ends of the back surface 3b of the top plate 3, at portions located inside the left and right directions relative to the brackets 51. The upper end of each shelf support 55 is fixed to the back surface 3b of the top plate 3. The shelf supports 55 face each other in the left and right directions in the space below the top plate 3.

[0037] The placing portion 56 spans the lower ends of the shelf supports 55 in the left-right direction. The placing portion 56 faces the back surface 3b of the top plate 3 in the up-down direction, with a gap between the placing portion 56 and the back surface 3b. In this embodiment, the placing portion 56 is made up of multiple rods arranged at intervals in the front-to-rear direction. An item can be placed on the placing portion 56 by inserting it onto the placing portion 56 through the gap between the placing portion 56 and the back surface 3b of the top plate 3, and then straddling the multiple rods. Note that the placing portion 56 is not limited to being made of rods, and may be made of plate material or the like.

[0038] The bearing member 53 rotatably connects the tabletop 3 to the connecting beam 42. The bearing member 53 is formed in a U-shape that opens upward when viewed from the left and right. The bearing member 53 is arranged to surround the connecting beam 42 from below. As a result, the outer peripheral surface of the connecting beam 42 slides on the inner peripheral surface of the bearing member 53 as the tabletop 3 rotates. The upper end of the bearing member 53 is fixed to the back surface 3b of the tabletop 3.

[0039] In this embodiment, the bearing members 53 are provided in a total of three locations, at the center in the left-right direction of the top board 3 and at locations corresponding to both left-right ends. In this case, of the multiple bearing members 53, the bearing members 53a located at both left and right ends are arranged in locations that are outside the shelf supports 55 in the left-right direction and inside the brackets 51 in the left-right direction. However, the left-right positions and number of the bearing members 53 can be changed as appropriate.

[0040] <Operating mechanism 12> 5 and 6, the actuation mechanism 12 changes the position of the tabletop 3 (hereinafter referred to as a flap operation) and moves the caster unit 15b up and down (hereinafter referred to as a caster switching operation). The actuation mechanism 12 includes an interlocking shaft 61, a pair of actuation modules 62, and an operation mechanism 64.

[0041] As shown in FIG. 1, the interlocking shaft 61 extends in the left-right direction in front of the connecting beam 42 (on the second side in the front-rear direction). The interlocking shaft 61 is supported between a pair of brackets 51 so as to be rotatable about an axis O2 that is parallel to the axis O1. As shown in FIG. 7, both left-right end portions of the interlocking shaft 61 pass through the corresponding brackets 51 in the left-right direction. The portion of the interlocking shaft 61 that is located inside the bracket 51 passes through the receiving portion 41c of the corresponding connecting plate 41.

[0042] 6, a pair of actuation modules 62 are provided corresponding to each leg 15a. In the following explanation, the configuration of one actuation module 62 will be explained using one actuation module 62 as an example.

[0043] The operating module 62 includes a linking lever 71, a tabletop switching lever 72, and a caster drive unit 73. The linking lever 71 is formed in a plate shape with its thickness in the left-right direction. The linking lever 71 is configured to be rotatable integrally with the interlocking shaft 61 within the bracket 51. In other words, the linking lever 71 is rotatably supported by the tabletop unit 11 via the interlocking shaft 61.

[0044] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. As shown in FIGS. 6 and 9, the linking lever 71 is formed in a fan shape in a side view. In a side view, the linking lever 71 has the interlocking shaft 61 fixed to the center thereof. A transmission portion 71a is formed on the outer periphery of the linking lever 71. The transmission portion 71a is a slit that extends in an arc shape in the circumferential direction about the axis O2. The linking lever 71 rotates integrally with the interlocking shaft 61 about the axis O2 in response to operation of the operating mechanism 64. In this embodiment, the linking lever 71 is configured to be rotatable on both sides (on both sides in the front-rear direction) about the axis O2 relative to the reference position R1, with a reference position R1 being the position when no operating force is applied to the linking lever 71.

[0045] The tabletop switching lever 72 is disposed inside the bracket 51 and laterally inward of the linking lever 71. In a side view, a portion of the tabletop switching lever 72 overlaps with the linking lever 71. The tabletop switching lever 72 includes a lever body 72a, an engaging recess 72b, and an engaging protrusion 72c.

[0046] The lever body 72a is a part that constitutes the outer shape of the tabletop switching lever 72 in a side view. An interlocking shaft 61 passes through the upper end of the lever body 72a. The tabletop switching lever 72 is supported by the interlocking shaft 61 so as to be rotatable about the axis O2. That is, the tabletop switching lever 72 and the interlocking lever 71 are configured to be relatively rotatable about the axis O2. The tabletop switching lever 72 is also rotatably supported by the tabletop unit 11 (bracket 51) and the interlocking lever 71 via the interlocking shaft 61. As shown in FIG. 8 , the inner left-right end face of the lever body 72a is located at the same position in the left-right direction as the inner left-right end face of the leg column 22. However, the inner left-right end face of the lever body 72a may be located outward in the left-right direction from the inner left-right end face of the leg column 22.

[0047] As shown in FIGS. 6 and 9, the engagement recess 72b is located at the bottom of the lever main body 72a and opens rearward. In the illustrated example, the engagement recess 72b is a recess that extends circumferentially about the axis O2 and opens toward the second side in the circumferential direction about the axis O2. The engagement recess 72b moves between a locked state S1 and an unlocked state S2 as the tabletop switching lever 72 rotates about the axis O2. When the linkage lever 71 is in the reference position R1 and the tabletop switching lever 72 is in the locked state S1, the rotation restricting portion 41a is accommodated within the engagement recess 72b. As a result, the rotation restricting portion 41a engages with the inner surface of the engagement recess 72b in the vertical direction (circumferential direction about the axis O1).

[0048] The tabletop switching lever 72 engages with the rotation restricting portion 41a to restrict rotation of the tabletop 3 (tabletop unit 11) from the use position Q1 to the non-use position Q2 (see FIG. 2) relative to the support structure 10. Meanwhile, as shown in FIG. 15, when the tabletop 3 is in the non-use position Q2, the engagement recess 72b moves to the locked state S1 to accommodate the return restricting portion 41b. As a result, the return restricting portion 41b engages with the inner surface of the engagement recess 72b in the vertical direction (the circumferential direction around the axis O1). That is, the tabletop switching lever 72 engages with the return restricting portion 41b to restrict rotation of the tabletop 3 from the non-use position Q2 to the use position Q1 relative to the support structure 10. Furthermore, as shown in FIG. 13, when the engagement recess 72b is in the unlocked state S2, the engagement recess 72b retreats to a position (forward) where it does not overlap with the rotation restricting portion 41a in a plan view, thereby disengaging from the rotation restricting portion 41a. This allows the tabletop 3 to rotate relative to the support structure 10 between the use position Q1 and the non-use position Q2.

[0049] 9, the engagement protrusion 72c protrudes outward in the left-right direction from a portion of the lever body 72a that is located forward of the engagement recess 72b. The engagement protrusion 72c extends obliquely upward and forward in a side view.

[0050] When the tabletop switching lever 72 is in the locked state S1, the engaging protrusion 72c is pushed toward the first side around the axis O2 by the linking lever 71 as the linking lever 71 rotates from the reference position R1 to the first side (forward) around the axis O2, causing the tabletop switching lever 72 to rotate integrally with the linking lever 71. As a result, the tabletop switching lever 72 moves from the locked state S1 toward the unlocked state S2. Meanwhile, when the tabletop switching lever 72 is in the locked state S1, the linking lever 71 moves away from the engaging protrusion 72c as the linking lever 71 rotates from the reference position R1 to the second side (rearward) around the axis O2, causing the linking lever 71 to disengage from the engaging protrusion 72c. In other words, when the linking lever 71 rotates toward the second side around the axis O2 relative to the tabletop switching lever 72, the linking lever 71 is configured to be able to retract from the engaging protrusion 72c. As a result, the tabletop switching lever 72 remains stationary in the locked state S1. A lever biasing member (not shown) that biases the top board switching lever 72 toward the locked state S1 is interposed between the top board switching lever 72 and the top board unit 11 (for example, the top wall portion 51a).

[0051] 3 and 6, the caster drive unit 73 connects the linking lever 71 and the caster unit 15b. The caster drive unit 73 moves the caster unit 15b between a non-traveling state P1 and a traveling state P2 in accordance with the rotation of the linking lever 71. Specifically, the caster drive unit 73 includes a connecting bar 90, a rear link bar 91, and a front link bar 92.

[0052] The connecting bar 90 connects the linking lever 71 and the rear link bar 91. The connecting bar 90 passes through the leg column 22 in the vertical direction. Specifically, the upper end of the connecting bar 90 protrudes upward beyond the leg column 22 through the upper end opening of the leg column 22. A connecting pin 90a protrudes inward in the left-right direction from the upper end of the connecting bar 90. The connecting pin 90a is housed within the transmission part 71a. In other words, the connecting pin 90a is provided so as to be movable within the transmission part 71a.

[0053] As the linking lever 71 rotates from the reference position R1 to the second side (rearward) about the axis O2, the linking pin 90a is pushed rearward by the inner surface of the transmission part 71a, and moves integrally with the linking lever 71. That is, the linking pin 90a revolves around the axis O2. As the linking pin 90a moves integrally with the linking lever 71, the linking bar 90 is pulled upward (see FIG. 17).

[0054] 3, the rear link bar 91 extends downward as it extends forward. Specifically, the rear link bar 91 includes a central connecting portion 91a, a first connecting portion 91b, and a second connecting portion 91c. The central connecting portion 91a is connected to a portion of the base leg 21 that is located forward of the through-hole 23c so as to be rotatable about an axis that extends in the left-right direction.

[0055] The first connecting portion 91b extends rearward from the central connecting portion 91a. The first connecting portion 91b is connected to the lower end of the connecting bar 90 within the leg column 22 so as to be rotatable about an axis along the left-right direction. The second connecting portion 91c extends forward from the central connecting portion 91a. The second connecting portion 91c is connected to the rear portion of the caster stay 36 so as to be rotatable about an axis along the left-right direction. That is, as the connecting bar 90 moves up and down, an operating force is applied in the up and down direction via the first connecting portion 91b, causing the rear link bar 91 to rotate about the central connecting portion 91a. As a result, as the connecting bar 90 moves upward, the second connecting portion 91c of the rear link bar 91 rotates downward, and as the connecting bar 90 moves downward, the second connecting portion 91c rotates upward.

[0056] The front link bar 92 is rotatably connected to the base leg 21 and the caster stay 36 at its front end within the base leg 21. The front link bar 92 extends downward as it extends forward. A first end of the front link bar 92 is connected to the front part of the base leg 21 (a part located forward of the rear link bar 91) so as to be rotatable about an axis along the left-right direction.

[0057] A second end of the front link bar 92 is connected to the caster stay 36 so as to be rotatable about an axis along the left-right direction. As the caster stay 36 moves up and down in response to the rotation of the rear link bar 91, the front link bar 92 rotates relative to the base leg 21 and the caster stay 36, thereby moving the front end of the caster stay 36 up and down relative to the base leg 21. In other words, the rear link bar 91 and the front link bar 92, together with the base main body 23 and the caster stay 36, form a so-called parallel link. The caster unit 15b is biased to the non-traveling state P1 by a caster biasing member (not shown) provided between the caster stay 36 and the base leg 21.

[0058] As shown in Figures 5 and 6, the operating mechanism 64 is provided near the left leg unit 15, for example, in correspondence with the left operating module 62. The operating mechanism 64 operates the operating module 62. The operating mechanism 64 includes an interlocking member 110 (see Figure 6), a connection part 111, and an operating part 112. Note that the operating mechanism 64 may be provided for each operating module 62.

[0059] The interlocking member 110 connects the connecting portion 111 and the interlocking shaft 61. Specifically, the interlocking member 110 extends in a direction intersecting the left-right direction (up-down direction) in a side view. A first end of the interlocking member 110 is fixed to a portion of the interlocking shaft 61 that is located between the bracket 51 and the bearing member 53a.

[0060] The connection part 111 connects the interlocking member 110 and the operating part 112. The connection part 111 is made of a material with excellent rigidity (for example, metal). The connection part 111 is formed in a plate shape with its thickness direction in the left-right direction. The connection part 111 extends in the front-rear direction along the rear surface 3b of the tabletop 3. The rear end part of the connection part 111 is connected to the second end part of the interlocking member 110 at a part located above the interlocking shaft 61. In this embodiment, the rear end part of the connection part 111 and the second end part of the interlocking member 110 are connected so as to be relatively rotatable around an axis along the left-right direction. The front end part of the connection part 111 reaches the front end part of the tabletop 3.

[0061] The operating unit 112 is a part of the operating mechanism 64 that is operated by the user. The operating unit 112 is supported on the rear surface 3b of the tabletop 3 via a bracket 51 at the front end of the tabletop 3. Specifically, the operating unit 112 includes a support piece 112a and an operating piece 112b.

[0062] The support piece 112a is disposed inside the bracket 51. The support piece 112a is supported by the bracket 51 so as to be rotatable about an axis along the left-right direction. A rear end of the connection part 111 is connected to a lower end of the support piece 112a (a boundary with the operation piece 112b). In this embodiment, the operation part 112 and the rear end of the connection part 111 are connected so as to be rotatable relative to each other about an axis along the left-right direction.

[0063] The operation piece 112b is connected to the lower end of the support piece 112a. In a side view, the operation piece 112b is formed in a plate shape that extends downward and rearward.

[0064] 5, a shielding mechanism 120 is provided between the pedestal 22 and the bracket 51. A shielding mechanism 120 is provided corresponding to each pedestal 22. In the following explanation, the shielding mechanism 120 provided corresponding to one (left) pedestal 22 will be used as an example to explain the details of the shielding mechanism 120.

[0065] The shielding mechanism 120 shields the portion of the operating module 62 that is located between the pedestal 22 and the bracket 51 (for example, the linking lever 71 and the top panel switching lever 72 (hereinafter referred to as the pivot mechanism)). The entire pivot mechanism is located above the pedestal 22 and overlaps with the upper end of the pedestal 22 in a plan view. In other words, as shown in Figure 8, the left and right end faces of the pivot mechanism either overlap with two imaginary lines formed by extending the left and right end faces of the pedestal 22 upward, or are located inside the two imaginary lines. However, it is sufficient that at least a portion of the pivot mechanism overlaps with the upper end of the pedestal 22.

[0066] FIG. 10 is an exploded perspective view of the shielding mechanism 120. As shown in FIG. 10, the shielding mechanism 120 includes a first shielding member 121 and a second shielding member 122. The first shielding member 121 is fixed to the upper end of the leg pillar 22. The first shielding member 121 includes a base 131, a front upright piece 132, and a side upright piece 133.

[0067] 9 and 10, the base 131 closes the upper end opening of the leg pillar 22. The upper end of the connecting bar 90 passes through the base 131 in the vertical direction.

[0068] 10 , the front upright piece 132 extends upward from the front edge of the base 131. The front upright piece 132 covers the pivot mechanism of the operating module 62 from the front. As the front upright piece 132 extends upward from the front edge of the base 131, it extends at an incline forward, and then extends upward in a straight line. Therefore, the front upright piece 132 protrudes forward relative to the leg pillar 22.

[0069] The side standing pieces 133 extend upward from the outer left-right edges of the base 131. The side standing pieces 133 cover the pivot mechanism of the operating module 62 from the outside in the left-right direction. In other words, the area above the base 131 surrounded by the side standing pieces 133 and the front standing piece 132 forms a mechanism space 135 that houses the pivot mechanism. The mechanism space 135 is open above the leg pillar 22 toward the inside in the left-right direction and toward the rear.

[0070] The side upright pieces 133 extend upward from the base 131 at an incline outward in the left-right direction, and then extend upward in a straight line. Therefore, the side upright pieces 133 protrude outward in the left-right direction relative to the leg pillar 22.

[0071] The second shielding member 122 is fixed to the tabletop unit 11 and is rotatable about an axis O1 integrally with the tabletop unit 11. The second shielding member 122 includes a front shielding portion 140 and a side shielding portion 141.

[0072] The front shielding portion 140 is disposed in front of the front upright piece 132. That is, when the tabletop 3 is in the use position Q1, the pivot mechanism is covered from the front by the front upright piece 132 and the front shielding portion 140. In a side view, the front shielding portion 140 is formed in an arc shape that extends downward and rearward. The upper end of the front shielding portion 140 is adjacent to the top wall portion 51a from below, inside the bracket 51. The lower end of the front shielding portion 140 is adjacent to the front upright piece 132 from the front. Locking claws 140a are formed on both left and right edge portions of the front shielding portion 140. The locking claws 140a are locked into locking holes 51e formed in the inner wall portion 51b and the outer wall portion 51c. That is, the second shielding member 122 is attached to the tabletop unit 11 via the bracket 51.

[0073] The side shielding portion 141 extends rearward from the outer edge of the front shielding portion 140 in the left-right direction. The rear edge (tip edge) of the side shielding portion 141 faces the outer peripheral edge of the outer wall portion 51c from the front and below. The rear edge of the side shielding portion 141 is formed to match the portion facing the side shielding portion 141. In other words, the rear edge of the side shielding portion 141 is close to or abuts the outer peripheral edge of the outer wall portion 51c. Therefore, the side shielding portion 141, together with the bracket 51, covers the pivot mechanism from the outside in the left-right direction. The lower end of the side shielding portion 141 is located in the mechanism space 135 through a gap between the front upright piece 132 and the side upright piece 133.

[0074] Fig. 11 is an enlarged perspective view of the tabletop-equipped furniture 1 as seen from below. Fig. 12 is a cross-sectional view of the area around the tabletop unit 11 in a state where a plurality of tabletop-equipped furniture 1A, 1B are nested. As shown in Figures 11 and 12, the abutment portions 13 are intended to cushion the impact that occurs when one of the multiple tabletop-equipped fixtures 1A, 1B comes into contact with another tabletop-equipped fixture 1B located in front of the first tabletop-equipped fixture 1A when the tabletops 3 are stacked on top of each other in the front-to-back direction (nesting). A pair of abutment portions 13 are provided at both left and right ends in the space below the tabletop 3. In the following explanation, the details of the abutment portion 13 will be explained using one (the left) of the pair of abutment portions 13 as an example.

[0075] The abutment portion 13 is provided in a portion that is located inside the bracket 51 in the left-right direction and outside the bearing member 53a and shelf unit 52. In other words, the abutment portion 13 is located in a position that is shifted inside in the left-right direction with respect to the pivot mechanism, the shielding mechanism 120, and the bracket 51, and is provided separately from the pivot mechanism, the shielding mechanism 120, and the bracket 51. The abutment portion 13 is arranged within the dimensional range of the leg pillar 22 in the front-rear direction. Therefore, the abutment portion 13 is covered from the outside in the left-right direction by the leg pillar 22 in a side view. The abutment portion 13 includes an attachment member 150 and a buffer material 151.

[0076] 7 and 11, the mounting member 150 is formed by pressing a metal plate, for example. The mounting member 150 is U-shaped and opens upward when viewed from the front-to-rear direction, and L-shaped when viewed from the side. Specifically, the mounting member 150 includes a base piece 155, an outer piece 156, an inner piece 157, and a front piece 158. The base piece 155 is disposed inside the bracket 51 in the left-right direction, with the thickness direction being the up-down direction.

[0077] The outer piece 156 extends upward from the outer edge of the base piece 155 in the left-right direction. The outer piece 156 faces the inner wall portion 51b in the left-right direction. The outer piece 156 is fixed to the inner wall portion 51b by welding or the like. As shown in FIG. 8 , the outer piece 156 has a positioning hole 156a penetrating the outer piece 156 in the left-right direction. For example, two positioning holes 156a are formed at intervals in the front-rear direction. To fix the contact portion 13 to the bracket 51, first, the receiving hole 51b1 and the positioning hole 156a formed in the inner wall portion 51b are aligned in a side view, and then a positioning pin (not shown) is inserted into the corresponding positioning hole 156a and receiving hole 51b1. This positions the contact portion 13 relative to the bracket 51. Thereafter, the outer peripheral edge of the outer piece 156 is welded to the inner wall portion 51b, thereby fixing the mounting member 150 to the bracket 51. However, the method of fixing the mounting member 150 to the bracket 51 can be changed as appropriate.

[0078] As shown in FIG. 11 , the inner piece 157 extends upward from the inner edge of the base piece 155 in the left-right direction. The inner piece 157 faces the outer piece 156 in the left-right direction. In the illustrated example, the upper edge of the inner piece 157 is located higher than the upper edge of the outer piece 156. The upper edge of the inner piece 157 is formed in an arc shape following the outer peripheral surface of the connecting beam 42. The upper edge of the inner piece 157 faces the outer peripheral surface of the connecting beam 42 in the up-down direction, with a small gap between them. Note that by setting the vertical length of the inner piece 157 to increase this gap, i.e., by shortening the vertical length of the inner piece 157, the inner piece 157 can be used as a hook for hanging bags, for example. It is also possible to omit the inner piece 157.

[0079] The front piece 158 extends upward from the front edge of the base piece 155. The upper edge of the front piece 158 is located lower than the upper edges of the outer piece 156 and the inner piece 157. Therefore, the gap between the front piece 158 and the connecting beam 42 is larger than the gap between the inner piece 157 and the connecting beam 42. The gap between the front piece 158 and the connecting beam 42 provides a gap for inserting tools or the like into the internal space of the mounting member 150 when welding the outer piece 156 to the inner wall portion 51b. By appropriately adjusting the vertical length of the front piece 158, it is possible to use it as a hook portion for hanging a bag, for example. It is also possible to omit the front piece 158.

[0080] The cushioning material 151 is the portion that comes into contact with the top plate 3 of another top-equipped furniture 1B during nesting as shown in FIG. 12. The cushioning material 151 is formed into a plate shape from a material softer than the mounting member 150, such as a synthetic resin material or a rubber material. The cushioning material 151 is fixed to the underside of the base piece 155, for example, with screws that penetrate the base piece 155. In this embodiment, the cushioning material 151 has an oval shape in a plan view with its longitudinal direction extending in the left-right direction. The underside of the cushioning material 151 functions as a contact surface 151a against which the top plate 3 of another top-equipped furniture 1B comes into contact during nesting. The contact surface 151a is formed into a flat surface that is perpendicular to the thickness direction of the cushioning material 151.

[0081] 11 and 12, the abutment portion 13 rotates about the axis O1 in conjunction with the rotation of the tabletop unit 11 about the axis O1 between the use position Q1 and the non-use position Q2. When the tabletop 3 is in the use position Q1, the abutment portion 13 is positioned inside the leg pillar 22 in the left-right direction and within the dimensional range of the leg pillar 22 in the front-rear direction, as described above. In this case, the abutment portion 13 is positioned with the abutment surface 151a facing downward.

[0082] When the tabletop 3 is in the unused position Q2, the abutment portion 13 is positioned forward and higher than when the tabletop 3 is in the used position Q1. When the tabletop 3 is in the unused position Q2, the abutment portion 13 is positioned so that the buffer material 151 faces forward. When the tabletop 3 is in the unused position Q2, the abutment portion 13 is positioned so that at least the abutment surface 151a is positioned forward of all components of the tabletop-equipped furniture unit 1 other than the base legs 21. When the tabletop 3 is in the unused position Q2, the buffer material 151 protrudes further than the tabletop unit 11, the shielding mechanism 120, and the shelf unit 52 in the normal direction of the abutment surface 151a in a side view. In this case, it is preferable that the inclination angle of the abutment surface 151a with respect to the floor surface F is equal to the inclination angle of the tabletop 3 (work surface 3a) with respect to the floor surface F. 11, the left-right distance D1 between the inward-facing surface of the leg pillar 22 and the left-right center of the abutment surface 151a is preferably 10 mm or more and 30 mm or less. By making the distance D1 10 mm or more, the left-right thickness of the outer piece 156 and the inner wall portion 51b can be ensured, making it easier to ensure the support strength of the cushioning material 151. Furthermore, by making the distance D1 30 mm or less, the length of the base piece 155 from the leg pillar 22 can be kept short, making it easier to ensure the strength of the mounting member 150.

[0083] <How to use the tabletop fixture 1> Next, we will explain how to use the tabletop-equipped furniture 1. The tabletop-equipped furniture 1 of this embodiment is designed to allow caster switching operation regardless of whether the flap is operating or not. In the following explanation, we will explain a collective switching mode in which the caster switching operation is performed when the tabletop unit 11 is moved to the unused position Q2, and a single switching mode in which the caster switching operation is performed while the tabletop unit 11 is in the used position Q1. In the following explanation, we will also explain the initial state as a state in which the tabletop 3 is in the used position Q1 and the caster unit 15b is in the disabled state P1.

[0084] 13 to 15 are explanatory diagrams of the operation of the tabletop-equipped furniture 1 for explaining the collective switching mode, and correspond to FIG. First, the collective switching mode will be described. With the tabletop-equipped fixture 1 in its initial position, the operating unit 112 is pushed rearward as shown in FIG. 13. This causes the operating unit 112 to rotate, pushing the second end of the interlocking member 110 rearward via the connecting unit 111. This causes the interlocking shaft 61 to rotate to the first side about the axis O2. The rotation of the interlocking shaft 61 causes each of the linking levers 71 of the pair of operating modules 62 to rotate from the reference position R1 to the first side about the axis O2. The following describes the operation of one (left) operating module 62 of the pair of operating modules 62 as an example.

[0085] When the linking lever 71 rotates from the reference position R1 to the first side about the axis O2, the linking lever 71 pushes the engagement protrusion 72c toward the first side about the axis O2. Then, the tabletop switching lever 72 rotates toward the first side about the axis O2 together with the linking lever 71 (see arrow Y1). When the linking lever 71 rotates toward the first side about the axis O2, the connecting pin 90a moves within the transmission part 71a. Therefore, even if the linking lever 71 rotates toward the first side about the axis O2, the connecting bar 90 remains stationary.

[0086] When the tabletop switching lever 72 rotates to the first side about the axis O2 against the biasing force of the lever biasing member, the tabletop switching lever 72 transitions from the locked state S1 to the unlocked state S2, causing the rotation restricting portion 41a to disengage from the engaging recess 72b (disengage). This allows the tabletop unit 11 to rotate about the axis O1 relative to the support structure 10.

[0087] After the tabletop switching lever 72 transitions to the unlocked state S2, the tabletop unit 11 is moved toward the unused position Q2. Specifically, as shown in FIG. 14, the front end of the tabletop 3 is pushed up while the operation unit 112 is pressed in (while the linkage lever 71 is rotated to the first side about the axis O2). This causes the tabletop unit 11 to rotate about the axis O1. As a result, the interlocking shaft 61 comes out of the receiving portion 41c, and the tabletop 3 transitions to the unused position Q2.

[0088] As the tabletop 3 moves from the use position Q1 to the non-use position Q2, the axis O2 revolves upward around the axis O1. This causes the linking lever 71 and the tabletop switching lever 72 to revolve around the axis O1. Then, the connecting pin 90a abuts against the surface of the inner surface of the transmission part 71a that faces the first side around the axis O2. In this state, the linking lever 71 further revolves around the axis O1, so that the connecting bar 90 is pulled up via the linking lever 71.

[0089] As shown in FIGS. 3 and 4, when the first connecting portion 91b is pulled up as the connecting bar 90 moves upward, the rear link bar 91 rotates around the central connecting portion 91a. This causes the second connecting portion 91c to move downward, pushing the rear end of the caster unit 15b down via the caster stay 36. Furthermore, as the caster stay 36 moves downward, the front link bar 92 rotates so that the second end of the front link bar 92 faces downward, pushing the front end of the caster unit 15b down as well. As a result, the caster unit 15b transitions to the slidable state P2 against the biasing force of the caster biasing member. In other words, in the tabletop-equipped furniture 1 of this embodiment, the caster unit 15b transitions from the non-slidable state P1 to the slidable state P2 as the tabletop 3 transitions from the in-use position Q1 to the unused position Q2.

[0090] As shown in FIG. 15 , after the caster unit 15b transitions to the slidable state P2, the operating force on the operating unit 112 is released. For example, a biasing force of a lever biasing member acts on the link lever 71 via the tabletop switching lever 72. Therefore, by releasing the operating force on the operating unit 112, the link lever 71 and the tabletop switching lever 72 rotate together toward the second side around the axis O2. As a result, the link lever 71 returns to the reference position R1, and the tabletop switching lever 72 returns to the locked state S1. When the tabletop switching lever 72 returns to the locked state S1 with the tabletop unit 11 in the unused position Q2, the engagement recess 72b fits (engages) with the return restriction portion 41b from above. This restricts the rotation of the tabletop 3 toward the unused position Q2 relative to the support structure 10. Furthermore, as the link lever 71 rotates toward the second side around the axis O2, the interlocking shaft 61 rotates toward the second side around the axis O2. As a result, the operating part 112 rotates via the interlocking member 110 and the connecting part 111, and the operating part 112 returns to the initial position M1.

[0091] FIG. 16 is an enlarged perspective view of the furniture unit 1 with the top panel 3 in the unused position Q2. 11 and 16, in the process of the tabletop 3 moving from the use position Q1 to the non-use position Q2, the second shielding member 122 rotates together with the tabletop 3 around the axis O1. That is, the second shielding member 122 is displaced upward around the axis O1 relative to the first shielding member 121. In this case, the pivot mechanism of the operating module 62 maintains a state in which the portion extending from the front to the top is covered by the front upright piece 132 and the front shielding portion 140, and the outer sides in the left and right directions are covered by the side upright piece 133, the upright sidewall 132b, and the side shielding portion 141. In addition, in the process of the tabletop 3 moving from the use position Q1 to the non-use position Q2, the abutment portion 13 rotates (revolves) together with the tabletop unit 11 around the axis O1. At this time, the contact portion 13 is displaced forward and upward about the axis O1, so that the contact surface 151a transitions from a state facing downward to a state facing forward.

[0092] As shown in Figures 2 and 12, by using the collective switching mode, the tabletop-equipped fixture 1 can be moved on the floor surface F with the tabletop unit 11 flipped up to the unused position Q2. In this case, multiple tabletop-equipped fixtures 1 can be stored with the tabletops 3 stacked in the front-to-back direction (so-called nested state). Specifically, of the tabletop-equipped fixtures 1A and 1B stacked in the front-to-back direction, one (e.g., the left) leg unit 15 of the rear tabletop-equipped fixture 1A is inserted between the pair of leg units 15 of the front tabletop-equipped fixture 1B, and the tabletop-equipped fixtures 1A and 1B are moved closer to each other in the front-to-back direction. At this time, the tabletop-equipped fixtures 1A and 1B are stacked in the front-to-back direction with the corresponding leg units 15 being close to each other in the left-to-right direction. As a result, of the leg units 15 on one side of each of the tabletop-equipped fixtures 1A, 1B, the leg unit 15 of the front tabletop-equipped fixture 1B is positioned outside in the left-right direction relative to the leg unit 15 of the rear tabletop-equipped fixture 1A, and of the leg units 15 on the other side of the left-right direction, the leg unit 15 of the rear tabletop-equipped fixture 1A is positioned outside in the left-right direction relative to the leg unit 15 of the front tabletop-equipped fixture 1B (so-called non-parallel nesting).This makes it possible to reduce the storage space for the tabletop-equipped fixture 1 in the unused position Q2.

[0093] As the tabletop-equipped fixtures 1A, 1B move closer to each other in the front-to-back direction, the cushioning material 151 (contact surface 151a) of the rear tabletop-equipped fixture 1A comes into contact with the work surface 3a of the front tabletop-equipped fixture 1B first. That is, the contact surfaces 151a of the cushioning materials 151 provided at both left and right ends of the rear tabletop-equipped fixture 1A come into contact with the work surface 3a of the front tabletop-equipped fixture 1B. This restricts the tabletop-equipped fixtures 1A, 1B from moving closer to each other in the front-to-back direction in the nested state. That is, the tabletop-equipped fixtures 1A, 1B are nested without the work surface 3a of the front tabletop-equipped fixture 1B coming into contact with the pedestal 22, shielding mechanism 120, etc. of the rear tabletop-equipped fixture 1A. In particular, in this embodiment, the abutment portion 13 is provided on a portion located on the inside in the left-right direction relative to the pivot mechanism, making it easier to bring the work surface 3a of the front table-top-equipped fixture 1B into contact with both abutment portions 13, even in non-parallel nesting, compared to when the abutment portion 13 is provided on a portion located on the outside in the left-right direction relative to the pivot mechanism. Note that in this embodiment, a configuration has been described in which one leg unit 15 of the rear table-top-equipped fixture 1A is inserted between a pair of leg units 15 of the front table-top-equipped fixture 1B, but this configuration is not limited to this. Table-top-equipped fixtures 1A and 1B may also be nested by inserting one leg unit 15 of the front table-top-equipped fixture 1B between a pair of leg units 15 of the rear table-top-equipped fixture 1A.

[0094] To return the tabletop-equipped furniture 1 to its initial position, the reverse operation to the above is performed. That is, the linking lever 71 is rotated to the first side about the axis O2 via the operating unit 112, and the tabletop switching lever 72 is shifted to the unlocked state S2, and the tabletop unit 11 is rotated about the axis O1. This returns the tabletop 3 to the use position Q1. As the tabletop 3 moves to the use position Q1, the linking lever 71 and the tabletop switching lever 72 rotate downward about the axis O1. This causes the caster unit 15b to be lifted from the movable state P2 to the non-movable state P1 via the connecting bar 90. As a result, the tabletop-equipped furniture 1 contacts the floor F via the rear cap 25 and the adjuster 26.

[0095] Next, the single switching mode will be described. Fig. 17 is an explanatory diagram for explaining the single switching mode, and corresponds to Fig. 9. As shown in FIG. 17, when the operating unit 112 is pulled toward the second side (forward) around the axis O4, the second end of the interlocking member 110 is pulled forward via the connecting portion 111. This causes the interlocking shaft 61 to rotate toward the second side around the axis O2. The rotation of the interlocking shaft 61 causes each interlocking lever 71 of the pair of operating modules 62 to rotate from the reference position R1 toward the second side around the axis O2 (see arrow Y2). At this time, the interlocking lever 71 rotates independently of the tabletop switching lever 72, causing the interlocking lever 71 to rotate while the tabletop switching lever 72 maintains the locked state S1. Then, during the process of the interlocking lever 71 rotating from the reference position R1 toward the second side (rearward) around the axis O2, the connecting pin 90a is pushed toward the second side around the axis O2 by the inner surface of the transmission portion 71a. This causes the connecting bar 90 to be pulled up. 3 and 4, the connecting bar 90 lowers the caster unit 15b, and the caster unit 15b transitions from the non-movable state P1 to the movable state P2. That is, in the single switching mode, the tabletop 3 is maintained in the use position Q1, and the caster unit 15b transitions from the non-movable state P1 to the movable state P2.

[0096] In the single switching mode, the tabletop unit 11 can be moved on the floor surface F while being maintained in the use position Q1. Therefore, when fine adjustments are required for the position of the tabletop-equipped furniture 1, it can be made without having to flip up the tabletop unit 11.

[0097] In the single switching mode, to return the tabletop-equipped furniture 1 to its initial position (to return the caster unit 15b to the non-traveling state P1), for example, the operating unit 112 is returned to its original position. Then, the linking lever 71 rotates toward the first side about the axis O2, returning the linking lever 71 to the reference position R1. Furthermore, as the linking lever 71 rotates toward the reference position R1, the biasing force of the caster biasing member raises the caster unit 15b from the travelling state P2 to the non-travelling state P1. This pulls down the connecting bar 90.

[0098] In this way, in the fixture 1 with a top plate of this embodiment, the part located inside (first side in the left-right direction) the pivot mechanism (connecting lever 71 and top plate switching lever 72) is configured to have an abutment portion 13 having an abutment surface 151a against which the work surface 3a of the front fixture 1A with a top plate abuts when the fixtures 1A and 1B with a top plate are stacked in the front-to-back direction. According to this configuration, since the abutment portion 13 is provided at a position shifted inward in the left-right direction relative to the pivot mechanism, the position and shape of the abutment portion 13 are less dependent on the shape and position of the pivot mechanism than in the conventional case where the blocking block is provided within the left-right dimensional range of the connecting portion. As a result, design freedom can be improved. Furthermore, since the abutment portion 13 is provided at a position shifted inward in the left-right direction relative to the pivot mechanism, it is possible to miniaturize the mechanisms around the pivot mechanism, including the shielding mechanism 120.

[0099] In the furniture with a top panel 1 of this embodiment, the pivot mechanism is configured to be above the pedestal 22 and overlap the upper end of the pedestal 22 in a plan view. According to this configuration, the pivot mechanism is positioned so as to overlap the legs 22 in a planar view, so even if the abutment portion 13 is provided inside the pivot mechanism in the left-right direction, it is easy to ensure a space for the lower legs formed between the pair of legs 22 below the tabletop 3.

[0100] In the tabletop-equipped furniture 1 of this embodiment, the inner end surface in the left-right direction of the pivot mechanism (lever main body 72a) is configured to be located at the same position in the left-right direction as the inner end surface in the left-right direction of the leg 22. According to this configuration, even if the abutment portion 13 is provided on the inner side in the left-right direction relative to the pivot mechanism, it is easy to ensure a space for the lower legs formed between the pair of leg pillars 22 below the top board 3.

[0101] In the display fixture 1 with a tabletop of this embodiment, the abutment portion 13 is connected to the tabletop 3 in a state in which it can rotate integrally with the tabletop 3, and when the tabletop 3 is in the use position Q1, the abutment portion 13 is positioned further rearward (first side in the front-to-back direction) than when the tabletop 3 is in the non-use position Q2. According to this configuration, when the tabletop 3 is in the use position Q1, interference between the lower limbs of a user who inserts the tabletop-equipped furniture 1 into the space below the tabletop 3 and the contact portion 13 can be avoided.

[0102] In the tabletop-equipped furniture 1 of this embodiment, the abutment surface 151a is configured to be positioned within the length of the leg pillar 22 in the front-rear direction when the tabletop 3 is in the use position Q1. With this configuration, when the tabletop 3 is in the use position Q1, the amount of forward protrusion of the contact portion 13 relative to the leg 22 can be reduced. This makes it possible to avoid interference between the lower limbs of a user who inserts the tabletop-equipped furniture 1 into the space below the tabletop 3 from the front and the contact portion 13.

[0103] In the fixture 1 with a tabletop of this embodiment, the portion of the tabletop 3 located between the pivot mechanism and the abutment portion 13 in the left-right direction is configured to have an inner wall portion (partition portion) 51b that separates the pivot mechanism and the abutment portion 13. According to this configuration, for example, when the top board 3 moves between the use position Q1 and the non-use position Q2, interference between the pivot mechanism and the contact portion 13 can be suppressed.

[0104] In the fixture with a top panel 1 of this embodiment, the abutment portion 13 is configured to have an outer piece (fixed piece) 156 fixed to the inner wall portion 51b, facing the inner wall portion 51b in the left-right direction. According to this configuration, the outer piece 156 and the inner wall portion 51b can be fixed facing each other, so that the abutting portion 13 can be easily and stably fixed to the inner wall portion 51b.

[0105] (Second embodiment) Fig. 18 is a cross-sectional view of a tabletop-equipped fixture 1 in the second embodiment. Fig. 19 is a cross-sectional view of the periphery of a tabletop unit 11 when multiple tabletop-equipped fixtures 1 are nested. This embodiment differs from the first embodiment described above in that the abutment portion 13 is fixed to the connecting beam 42. 18 and 19, the contact portion 13 is integrally formed from, for example, a synthetic resin material, a rubber material, etc. The contact portion 13 includes a base portion 200 and a buffer portion 201.

[0106] The base 200 is formed in a rectangular parallelepiped shape. The rear surface of the base 200 is formed in an arc shape following the outer circumferential surface of the connecting beam 42. The abutting portion 13 is attached to the connecting beam 42 with the rear surface of the base 200 abutting against the outer circumferential surface of the connecting beam 42. When attached to the connecting beam 42, the abutting portion 13 protrudes forward (diagonally downward and forward) relative to the connecting beam 42. In this embodiment, the abutting portion 13 is attached to the connecting beam 42 by inserting a screw (not shown) or the like into a through-hole 200a that penetrates the base 200 in the front-to-rear direction and fastening the screw to the connecting beam 42. However, the method of attaching the abutting portion 13 to the connecting beam 42 can be changed as appropriate.

[0107] The buffer section 201 protrudes forward from the front surface of the base section 200. Specifically, the buffer section 201 has a plate-like section that protrudes forward from the entire outer periphery of the base section 200, so that the buffer section 201 is formed in a cylindrical shape that surrounds the entire outer periphery of the base section 200 as a whole. The front end surface of the buffer section 201 functions as an abutment surface 201a against which the top plate 3 of another tabletop-equipped furniture unit 1B abuts when nested. When the top plate 3 is in the unused position Q2, the abutment section 13 is positioned so that at least the abutment surface 201a is located forward of all components of the tabletop-equipped furniture unit 1 other than the base legs 21.

[0108] According to this embodiment, in addition to achieving the same effects as those of the first embodiment, the abutment portion 13 does not rotate during flap operation because the abutment portion 13 is attached to the connecting beam 42. Therefore, interference between the abutment portion 13 and the user during flap operation can be suppressed.

[0109] (Other variations) Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Addition, omission, substitution, and other modifications of the configuration are possible without departing from the spirit of the present invention. The present invention is not limited by the above description, but is limited only by the appended claims. In the above-described embodiment, a configuration in which the caster unit 15b moves between a non-movable state P1 and a movable state P2 has been described, but the present invention is not limited to this configuration. The tabletop-equipped fixture 1 only needs to have at least the tabletop 3 move between a use position Q1 and a non-use position Q2. In the above-described embodiment, a desk has been used as an example of the tabletop-equipped fixture 1 according to the present invention, but the present invention is not limited to this configuration. The tabletop-equipped fixture according to the present invention can be used in various fixtures that have a tabletop, such as shelves and cart devices.

[0110] In the above embodiment, a configuration has been described in which the abutment portions 13 are provided at positions corresponding to both left and right ends of the tabletop-equipped fixture 1, but this configuration is not limited to this. The abutment portions 13 may be provided at portions of the tabletop-equipped fixture 1 that are located on both sides of the center in the left and right direction. In the above-described embodiment, a configuration in which a pair of left and right legs 22 are provided has been described, but this configuration is not limited thereto. At least one leg 22 is sufficient. Regardless of the number of legs 22, the abutment portion 13 is sufficient as long as it is provided in a portion that is located closer to the center of the tabletop 3 with respect to the pivot mechanism. In the above-described embodiment, the pivot mechanism is provided at a position overlapping the leg pillar 22 in a plan view, but the present invention is not limited to this configuration. The leg pillar 22 and the pivot mechanism may be provided at positions offset from each other in a plan view. In the above-described embodiment, a pair of left and right leg columns 22 are provided, and the abutment portion 13 is provided on the inside in the left-right direction of each leg column 22. However, this configuration is not limited to this. A configuration in which the abutment portion 13 is provided for at least one of the leg columns 22 may also be used. Furthermore, as long as the abutment portion 13 is provided on the inside in the left-right direction of one of the leg columns 22, the abutment portion 13 may be provided on the outside in the left-right direction of the remaining leg columns 22. For example, the abutment portion 13 provided on the outside in the left-right direction of the leg column 22 may have a hook or the like integrally formed therewith, extending outward in the left-right direction.

[0111] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0112] 1, 1A, 1B: Furniture with tabletop 3: Top plate 3a: Working surface 10: Support structure 13: Contact part 22: Pillar 51b: Inner wall (partition) 151a: Contact surface 156:Outer piece (fixed piece) 201a: Contact surface Q1: Usage position Q2: Unused position

Claims

1. a top plate having a work surface; a support structure that supports the top plate from below; A tabletop-equipped furniture unit including a pivot mechanism provided between the tabletop and the support structure, and capable of rotating the tabletop relative to the support structure about an axis along the left-right direction between a use position in which the work surface faces upward and a non-use position in which the work surface faces a first side in the front-to-rear direction, The fixture with a tabletop and another fixture with a tabletop located on a second side in the front-to-rear direction relative to the fixture with a tabletop are configured to be stackable in the front-to-rear direction with their respective tabletops in the unused position, In a portion located on a first side, closer to the center of the tabletop in the left-right direction relative to the pivot mechanism, a contact portion is provided having an abutment surface against which the work surface of another tabletop-equipped fixture abuts when the tabletop-equipped fixture and another tabletop-equipped fixture are stacked in the front-to-back direction.

2. the support structure includes a pedestal extending in a vertical direction and having a dimension in a front-to-rear direction smaller than a dimension in a front-to-rear direction of the tabletop when the tabletop is in the use position; The legs are provided in pairs spaced apart in the left-right direction, The display unit with a top plate according to claim 1, wherein the pivot mechanism is provided above the base in a position where at least a portion of the pivot mechanism overlaps with the base in a plan view.

3. A display unit with a top plate as described in claim 2, wherein the first edge of the pivot mechanism in the left-right direction is located at the same position in the left-right direction as the first edge of the leg pillar in the left-right direction, or on the second side in the left-right direction.

4. the abutment portion is connected to the top plate in a state in which the abutment portion can rotate integrally with the top plate, A display unit with a top plate described in any one of claims 1 to 3, wherein the abutment surface is located on a first side in the front-to-back direction when the top plate is in the use position compared to when the top plate is in the non-use position.

5. the support structure includes a pedestal extending in a vertical direction and having a dimension in a front-to-rear direction smaller than a dimension in a front-to-rear direction of the tabletop when the tabletop is in the use position; The tabletop-equipped furniture according to claim 4, wherein the abutment surface is positioned within the dimensional range of the base in the front-to-rear direction when the tabletop is in the use position.

6. A display unit with a tabletop as described in claim 4, wherein a partition wall portion is provided in the portion of the tabletop located between the pivot mechanism and the abutment portion in the left-right direction, separating the pivot mechanism and the abutment portion.

7. The fixture with a top panel according to claim 6, wherein the abutment portion has a fixing piece fixed to the partition wall portion in a state facing the partition wall portion in the left-right direction.

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