JP2006263057A - Supporting leg of desk etc - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the supporting strength of an upper arm in a support leg of a desk or the like. <P>SOLUTION: The rear part of the upper arm 8 is fitted between an opening part 93 provided in the upper end of a front plate part 91 in a leg panel 9 and both outside plate parts, inward engagement pieces 94 provided in the upper ends of the both outside plate parts 92 in the leg panel 9 are made to abut on the rear part upper face 83a of the upper arm 8, and an abutment part 11a provided at the upper arm 8 and projecting outward from its outer face abutting on the circumferential edge of the opening part 93. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a support leg such as a table or desk used in an office or the like.

Conventionally, in tables, desks, etc. used in offices, etc., the top plate is supported by a plurality of columnar support legs that are spaced apart from each other on the left and right, and the top plate is supported by a U-shaped support leg in a side view. There is support. The U-shaped support legs are extremely effective in securing a wide space around the lower limbs, and include an upper arm fixed to the lower surface of the top plate, a leg body to which the rear part of the upper arm is fixed, The lower arm is fixed to the lower portion of the leg body and is grounded to the floor, and the upper and lower arms are screwed to the leg body with mounting screws (see, for example, Patent Document 1).
In some cases, the upper arm and the leg main body are formed by bending a sheet metal, and these are fixed to each other by welding (for example, see Patent Document 2).
Japanese Patent Laid-Open No. 10-331301 JP-A-7-327748

  However, since the upper arm and the leg main body are fixed to each other by the mounting screws, the above-described patent document 1 is troublesome to fasten the mounting screws, and the upper screws are loosened due to aging. There is a risk that the arm and eventually the top plate will rattle.

  Moreover, in what was described in the said patent document 2, since an upper arm and a leg main body are mutually fixed by welding, although the occurrence of rattling by an aging change is few, a downward load acted on the front part of the upper arm. In this configuration, the couple acting on the rear part of the upper arm is received only at the welding point, so that there are many welding points for securing the support strength of the upper arm, and there is a problem that the welding work becomes troublesome.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a support leg such as a desk that can improve the support strength of the upper arm with a simple configuration.

According to the present invention, the above problem is solved as follows.
(1) It is fixed to the lower surface of the top plate at the upper part of the leg panel facing the vertical direction having a front plate part and a pair of left and right outer plate parts bent backward from the left and right ends of the front plate part. In a support leg such as a desk or the like formed by adhering a rear portion of an upper arm facing in the front-rear direction having a pair of inner plate portions, an opening provided at an upper end of the front plate portion in the leg panel, the rear portion of the upper arm. And an inward engagement piece provided at the upper end of the outer plate portions of the leg panel is brought into contact with the upper surface of the rear portion of the upper arm. An abutting portion provided on the upper arm and projecting outward from the outer surface thereof is fixed in a state of abutting on the periphery of the opening.

(2) In the above item (1), the front portion of the upper arm that protrudes forward from the leg panel is covered with an arm cover that faces in the front-rear direction, and the contact portion is the rear end of the arm cover.

(3) In the above item (1) or (2), the inwardly engaging piece of the leg panel is formed in a stepped shape so that the rear part is lower than the front part.

(A) According to the first aspect of the present invention, the rear portion of the upper arm is fitted between the opening provided at the upper end of the front plate portion of the leg panel and both outer plate portions, and both outer sides of the leg panel are provided. The inward engagement piece provided at the upper end of the plate part is brought into contact with the upper surface of the rear part of the upper arm, and the contact part provided on the upper arm and projecting outward from the outer surface thereof is provided at the periphery of the opening. By fixing in a contact state, the inward engagement piece abuts on the upper surface of the upper part of the upper arm, and the couple acting on the rear part of the upper arm when a downward load is applied to the front part of the upper arm. It can be received and the support strength of the upper arm can be improved.

(B) According to the invention described in claim 2, the upper arm is covered with the arm cover, so that the appearance and strength of the upper arm can be improved, and the periphery of the opening is concealed by the rear end of the arm cover. The appearance can be improved without being exposed.

(C) According to the invention described in claim 3, by making the inward engagement pieces stepped, the bending strength of the inward engagement pieces can be improved, and the support strength of the upper arm can be further improved.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view of a desk to which a support leg according to the present invention is applied, and FIG. 2 is a longitudinal sectional view taken along line II-II in FIG. In the following description, the upper left in FIG. 1, the left in FIG. 2 is “front”, the lower right in FIG. 1, and the right in FIG. 2 is “rear”.

  As shown in FIG. 1, the desk (1) has a base body constructed by connecting three support legs (2) spaced apart from each other with left and right connecting rods (3) and (3). It is formed by placing two left and right top plates (5) and (5) on the upper side of (4).

  The support legs (2) are panel-type support legs (6) and (6) at the left and right ends of the desk (1), and a forward U-shaped support leg (7) at the center. The support leg (2) according to the present invention is applied to the U-shaped support leg (7).

  The U-shaped support leg (7) is fixed to the lower surface of the top plate (5), and has an upper arm (8) facing in the front-rear direction and a leg panel facing in the vertical direction to which the rear portion of the upper arm (8) is fixed. 9) and a lower arm (10) facing the front-rear direction that is fixed to the lower part of the leg panel (9) and is grounded to the floor.

  3 is an enlarged view of an arrow III part in FIG. 2, FIG. 4 is a view taken along arrow IV in FIG. 3, FIG. 5 is a longitudinal sectional view taken along line VV in FIG. 3, and FIG. FIG. 7 is an enlarged perspective view of the main part after assembly.

  As shown mainly in FIG. 6, the leg panel (9) is formed by bending a sheet metal, and is folded at a right angle from the left and right ends of the front plate portion (91) and the front plate portion (91). It has a substantially U-shaped cross section with a rear opening provided with a pair of bent left and right outer plate portions (92) and (92).

  A pair of left and right inward engagement pieces (94) positioned above and behind the upper end (91a) of the front plate portion (91) are arranged at the upper ends of the outer plate portions (92) and (92) of the leg panel (9). (94) is bent.

  Above the upper end of the front plate portion (91) in the leg panel (9), the upper end (91a) of the front plate portion (91), the upper front edge (92a) of both side plate portions (92), and both inward An opening (93) (see FIG. 6) that is open at the top surrounded by the engagement piece (94) is formed.

  The inward engagement piece (94) is formed in a stepped shape so that the front part (94a) of the front half is one step higher than the rear part (94b) of the rear half, and as will be described later, the upper arm (8) The support strength of the upper arm (8) is improved by contacting the stepped portion (83a) forming the upper surface of the rear portion. Moreover, the bending strength of the inward engagement piece (94) can be increased by making the inward engagement piece (94) stepped.

  The upper arm (8) is formed by bending a sheet metal, is opposed to the lower surface of the top plate (5), and is fixed with a screw or the like, and a flat upper plate portion (81) and an upper plate portion (81 ) Is bent substantially at a right angle downward from both left and right ends, and has a substantially U-shaped vertical cross section with a pair of left and right inner plate portions (82) spaced apart in the left-right direction.

  Both inner side plate portions (82) are formed in a step shape having a widened portion (82b) projecting outward at the lower portion. Accordingly, the width in the left-right direction at the rear portion of the upper arm (8) is formed so that the lower portion is wider than the upper portion. The widened portion (82b) is formed over the entire length of the upper arm (8) in the front-rear direction.

  A stepped portion (83a) formed at the upper portion of the widened portion (82b) at the rear portion of the upper arm (8) forms the upper surface of the rear portion, and the inwardly engaging piece (94) of the leg panel (9) in a side view. It has almost the same shape. Further, an extension portion (83b) extending downward along the inner surface of the outer plate portion (92) of the leg panel (9) is provided at the lower portion of the rear portion of the upper arm (8).

  The fitting portion (83) formed by the lower portion of the inner plate portions (82) at the rear portion of the upper arm (8), that is, the widened portion (82b) including the extended portion (83b) is formed on both the leg panels (9). The narrow portion (82a) in the upper portion, i.e., the region where the widened portion (82b) is not formed, is fitted between the outer plate portions (92). Fitted.

  As shown in FIG. 5, the upper width dimension (a1) at the rear part of the upper arm (8) is the distance dimension (a2) between the inward engagement pieces (94) and the lower width dimension (b1). ) Corresponds to the left-right width (b2) of the opening (93) in the leg panel (9) (see FIG. 6). In addition, the left-right width (b2) of the opening (93) is the same as the dimension between the inner surfaces of the side plate portions (92) in the leg panel (9).

  A plurality of bolts (12) for fixing the end of the connecting rod (3) are screwed into the narrow portion (82a) of the upper arm (8) protruding from the upper end of the leg panel (9). The screw hole (82c) is screwed.

  The front part of the upper arm (8) protruding forward from the leg panel (9) is formed by bending a sheet metal and is covered with an arm cover (11) having a substantially U-shaped longitudinal section with an open upper part. To be fixed. Thereby, the form which fixed the arm cover (11) to the upper arm (8) becomes a closed cross-sectional shape, the rigidity of the upper arm (8) is improved, and the appearance is improved.

  Next, how to fix the upper arm (8) to the leg panel (9) will be described. First, the front part of the upper arm (8) is inserted into the notch opening (93) while the both side plate parts (92) are bent outward from the rear side of the leg panel (9) to protrude forward. Then, the fitting portion (83) of the upper arm (8) is engaged between the opening (93) and the outer side plate portions (92) of the leg panel (9), and the narrow width portion (82a) is inwardly engaged. They are respectively fitted between the pieces (94), and the stepped portion (83a) of the fitting portion (83) is formed on the lower surface of the inwardly engaging piece (94) of the leg panel (9) and the upper arm (8). ) Is brought into contact with the lower edge of the opening (93), that is, the upper end (91a) of the front plate (91), and in this state, the outside of the extension (83b) of the upper arm (8). The side plates and the outer plate portions (92) of the leg panels (9) are fixed to each other by spot welding.

  Next, the arm cover (11) is covered and fixed to the front portion of the upper arm (8), and the arm cover forms a contact portion that protrudes laterally from the outer surface of the inner plate portion (82) of the upper arm (8). (11) The rear end (11a) is connected to the periphery of the opening (93) (the upper end (91a) of the front plate portion (91), the upper front edge (92a) of both side plate portions (92), and the inward engagement. The side surfaces of the arm cover (11) and the upper arm (8) are fixed to each other by spot welding while being in contact with the front edge of the piece (94).

  As described above, when a downward load is applied to the front portion of the upper arm (8) by bringing the inward engagement piece (94) into contact with the stepped portion (83a) of the upper arm (8), The inward engagement piece (94) can receive the upward couple acting on the rear part of the upper arm (8) with the upper end (91a) of the front plate (91) of the leg panel (9) as a fulcrum. The support strength of the upper arm (8) can be improved and the top plate (5) can be firmly supported. In addition, by fixing the rear end (11a) of the arm cover (11) covering the upper arm (8) to the leg panel (9) by welding or the like in contact with the periphery of the opening (93), The support can be strengthened and the appearance of the opening (93) can be improved because the periphery of the opening (93) is not concealed and exposed.

  8 and 9 show another embodiment of the present invention, FIG. 8 is an exploded perspective view of the main part, and FIG. 9 is a perspective view of the main part after assembly. The leg panel (20) in this embodiment has a substantially U-shaped transverse cross section, and has flat inward engagement pieces (22) at the upper ends of a pair of left and right outer plates (21). ing.

  The upper arm (30) fixed to the upper part of the leg panel (20) has a substantially U-shaped longitudinal section with an upper opening, and is formed by a pair of left and right inner plates (31) formed on both sides thereof. At the upper end of the rear part, an inward bent piece (32) that forms the upper surface of the rear part that can come into contact with the lower surface of the inward engagement piece (22) of the leg panel (20), and both inner side plate parts (31) In the rear portion, extension portions (33) extending downward along the inner surfaces of both outer side plate portions (21) of the leg panel (20) are formed.

  The rear part including the extension part (33) of the upper arm (30) is formed on the upper part of the front plate part (23) of the leg panel (20), and the upper part opening (24) and leg panel (20) are opened. While fitting between the outer side plate parts (21), the inwardly bent piece (32) of the upper arm (32) is brought into contact with the lower surface of the inwardly engaging piece (22) of the leg panel (20). In this state, the outer surface of the extension portion (33) of the upper arm (30) and the outer plate portion (21) of the leg panel (20) are fixed to each other by spot welding. Next, the arm cover (40) formed by bending the sheet metal is covered on the front part protruding forward from the leg panel (20) of the upper arm (30) and the arm cover (40 The side surfaces of the arm cover (40) and the upper arm (30) are fixed to each other by spot welding in a state where the rear end (41) is in contact with the periphery of the opening (24) of the leg panel (20). Thereby, the upper arm (30) is fixed to the upper part of the leg panel (20).

  Also in this other embodiment, as in the previous embodiment, when a downward load is applied to the front portion of the upper arm (30), the upward couple force acting on the rear portion of the upper arm (30) is caused by welding. Combined with the fixed part, the inward engagement piece (22) can abut against the inwardly bent piece (32) of the upper arm (30) to improve the support strength of the upper arm (30). The top plate (5) can be firmly supported.

Although the embodiment of the present invention has been described above, the following various modifications and changes can be made to the present embodiment without departing from the gist of the present invention.
(I) A part of the side surface of the upper arm (8) (30) protrudes outward, and this protruding part is applied to the periphery of the opening (24) (93) of the leg panel (9) (20). The contact portion is in contact.
(Ii) The upper arms (8) and (30) have a vertical cross-sectional shape other than the above embodiment.
(Iii) The arm covers (11) and (31) are omitted as necessary.

It is a perspective view of the desk to which the support leg concerning this invention is applied. It is a longitudinal cross-sectional view which follows the II-II line | wire in FIG. It is an enlarged view of the arrow III part in FIG. It is IV arrow line view in FIG. It is a longitudinal cross-sectional view which follows the VV line in FIG. It is an expansion disassembled perspective view of the principal part. It is an enlarged perspective view similarly after assembling. It is a disassembled perspective view of the principal part of other embodiment. It is a perspective view after assembling similarly.

Explanation of symbols

(1) Desk
(2) Support legs
(3) Linkage
(4) Base body
(5) Top plate
(6) Panel type support legs
(7) U-shaped support leg (support leg)
(8) Upper arm
(9) Leg panel
(10) Lower arm
(11) Arm cover
(11a) Rear end (contact part)
(12) Bolt
(20) Leg panel
(21) Outer plate
(21a) Leading edge
(22) Inward engagement piece
(23) Front plate
(24) Opening
(30) Upper arm
(31) Inner plate
(32) Inwardly folded piece (rear top surface)
(33) Extension
(40) Arm cover
(41) Rear end (contact part)
(81) Upper plate
(82) Inner plate
(82a) Narrow part
(82b) Widening part
(82c) Screw hole
(83) Mating part
(83a) Stepped part (rear upper surface)
(83b) Extension
(84) Bottom
(91) Front plate
(91a) Upper end
(92) Outer plate
(92a) Leading edge
(93) Opening
(94) Inward engagement piece
(94a) Front
(94b) Rear

Claims (3)

Fixed to the lower surface of the top plate at the top of the leg panel that has a front plate portion and a pair of left and right outer plate portions bent rearward from the left and right ends of the front plate portion, and is at least one pair left and right In a support leg such as a desk formed by fixing the rear part of the upper arm facing the front-rear direction having the inner plate part,
The rear part of the upper arm is fitted between an opening provided at the upper end of the front plate part of the leg panel and the outer plate parts, and is provided at the upper ends of the outer plate parts of the leg panel. The inward engagement piece thus formed is brought into contact with the upper surface of the rear portion of the upper arm, and the contact portion provided on the upper arm and projecting outward from the outer surface is brought into contact with the peripheral edge of the opening. A support leg such as a desk characterized by being fixed in a standing state.   The desk or the like according to claim 1, wherein a front portion of the upper arm that projects forward from the leg panel is covered with an arm cover that faces in the front-rear direction, and the contact portion is a rear end of the arm cover. Support legs. 3. A support leg for a desk or the like according to claim 1, wherein the inwardly engaging pieces of the leg panel are formed in a stepped shape so that the rear part is lower than the front part.

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