JP2003135213A - Connecting structure of support rod and leg in furniture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly connect a support rod and a leg in a piece of furniture like a connecting chair without the generation of excessive residual stress. SOLUTION: The end parts of a pair of front and rear support rods 2a, 2b for supporting a seating plate are fitted in fitting grooves 4 provided in front and rear parts of the top surface of a horizontal rod 1b in the leg body 1, and fitting grooves 14 provided in the front and rear parts of the lower surface of a clamping member 13 are fitted thereto from above. A projecting part 18 projected on the central part of the lower surface of the clamping member 13 is abutted on the top surface of the horizontal rod 1b, and in the parts close to the support rods 2a, 2b between the projecting part 18 and the respective fitting grooves 4, 14, the horizontal rod 1b and the clamping member 13 are fastened with two set screws 21, 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention In a furniture such as a connecting chair, the present invention supports a pair of front and rear supporting rods for supporting functional members such as a seat plate and a table, and supports a plurality of left and right supporting rods. The present invention relates to a connection structure with a leg or a functional member.

[0002]

2. Description of the Related Art A connecting chair having a plurality of seat plates attached to two front and rear supporting rods facing the right and left directions is, for example, an actual fair 5-2.
It is described in Japanese Patent No. 5495 and is publicly known.

[0003]

In this known connecting chair, the weights of a plurality of seated occupants are added to the front and rear two supporting rods, and this total weight is transmitted to the legs, so that the supporting rods and legs or The connection with the seat plate must be strong. For this reason, it is conceivable that the legs are composed of an upper member and a lower member, and a support rod is sandwiched between the upper and lower members to be tightened with bolts. Such residual stress may occur and cause cracks and the like.

In view of the above problems, the present invention enables a support rod in furniture such as a connecting chair and a functional component such as a leg or a seat plate to be firmly coupled to each other without causing excessive residual stress. It is an object of the present invention to provide a connecting structure of a supporting rod and legs in a furniture which has been made into.

[0005]

According to the present invention, the above problems can be solved as follows. (1) In a furniture in which a functional member such as a seat plate is mounted on a pair of front and rear support rods which are supported by legs at a plurality of positions in the left-right direction and which are parallel to and spaced from each other, the support rods and the legs or In the connection structure with a functional member, the connection part with the supporting rod in the leg or the functional member is constituted by an upper member and a lower member, and the lower surface side of the front and rear supporting rods are respectively formed on the upper and lower front parts of the lower member. A fitting groove for fitting is provided, and fitting grooves for fitting the upper surfaces of the front and rear supporting rods are provided at front and rear portions of the lower surface of the upper member, and further, fitting grooves for the lower member and the upper member. In a state in which the front and rear support rods are fitted and sandwiched, the upper surface of the lower member and the lower surface of the upper member except for the fitting groove are slightly separated and are in parallel,
A convex portion facing the facing surface is provided at a central portion in the front-rear direction of either the lower surface of the upper member or the upper surface of the lower member, and the upper member and the lower member are provided between the convex portion and both supporting rods. ,
The fastening means fasten each other.

(2) In the above item (1), a concave portion for lightening is provided on the lower surface of the upper member or the upper surface of the lower member, and the convex portions are formed on the left and right sides of the concave portion on the lower surface of the upper member or the upper surface of the lower member. Provided at the peripheral edge of

(3) In the above item (1) or (2), a screw hole is provided in the lower surface of the upper member, a through hole facing the screw hole is provided in the lower member, and the bolt is inserted through the through hole. The upper member and the lower member are coupled to each other by being screwed into the screw holes.

(4) In any one of the above items (1) to (3), the upper member and the lower member form a holding member for connecting to other furniture, and at least the upper member and the lower member. An intermediate member that is connected to a similar holding member provided on the other furniture is connected to either one of them.

[0009]

1 is a perspective view of a connecting chair having an embodiment of the present invention. This connecting chair consists of front and rear leg rods (1a) (1a) and both leg rods (1a) (1a)
It is provided with three legs (1) made of, for example, die-cast, which are composed of a horizontal rod (1b) connecting the upper ends of the two. A plurality of support rods (2a) (2b), which are made of, for example, steel pipes and are oriented in the left-right direction, are supported by the three legs (1) at both ends and the intermediate portion, and a plurality of them are provided. Seat plates (3) with backrests (4 in the illustrated example) are attached.

FIG. 2 is an exploded perspective view showing the right end portion of this connecting chair together with optional parts. As is clear from this figure, the horizontal rod (1b) of the leg body (1) has a length in the front-rear direction that is sufficiently longer than that of the conventional type leg body, and the seat plate
The length is long enough to reach a considerable length portion of the total length in the front-rear direction of (3). Semi-cylindrical fitting grooves (4) extending in the left-right direction are formed at both front and rear ends of the upper surface of the horizontal rod (1b).

Two hollow support rods (2a) (2b) extending in the left-right direction, which are fitted in the front-rear fitting grooves (4), are provided on the front and rear sides of a plurality of brackets (5) facing in the front-rear direction. The lower surface near the end is fixed by welding from above. bracket
As shown in FIG. 3, (5) is a metal member having a downward U-shaped cross section, and a concave groove (6) is formed in the mounting portion of the support rods (2a) and (2b). (2a) and (2b) are fitted and welded. The welding positions of the bracket (5) to the support rods (2a) (2b) are positions corresponding to both left and right side portions of the seat plate (3).

Furthermore, the front and rear ends of the bracket (5) are
As shown in FIGS. 2 and 3, the support rods (2a) and (2b) project forward and backward, and a screw insertion hole (7) forming a seat plate attachment portion is formed therein.

Set screw inserted into this screw insertion hole (7)
With (8), the front and rear parts of the lower surface of the seat plate (3) are
It is fixed to the front and back of (5).

Cushion bodies (9) and (10) are attached to the seat portion and the backrest portion of the seat plate (3), respectively.

As shown in FIG. 3, FIG. 4 and FIG.
(2a) and (2b) end portions (and the center portion are the same, although not shown) are placed and fixed on the upper surface of the leg body (1). A vertical through hole (11) is provided at the end of the support rods (2a) (2b).
Has been drilled. On the other hand, each fitting groove in the leg (1)
At the center of the bottom of (4), a short projection (12) that is large enough to fit into the through hole (11) is provided.

The supporting rod is opposed to the horizontal rod (1b) of the leg body (1).
A sandwiching member (13) is disposed above the (2a) and (2b).
The sandwiching member (13) shown in the figure is a die-cast member having a downward U-shaped cross section, and the front and rear ends of the lower surface of the sandwiching member (1a) (1b) are fitted with a semicircular fitting groove ( 14) is provided.

FIG. 6 is an enlarged side view showing a connecting portion (15) of the legs with the support rods (2a) (2b), and FIG. 7 is a VII-V of FIG.
It is a vertical section front view which follows the II line.

As shown in FIG. 6, the supporting rod (2a) on the leg.
The connecting portion (15) with (2b) is composed of a lower member formed by the horizontal rod (1b) of the leg body (1) and an upper member formed by the sandwiching member (13) above it. . Lower body leg (1)
The upper surface of the horizontal rod (1b) other than the fitting groove (4) is flush, and the upper surface of the upper holding member (13) other than the fitting groove (14) is flush. (4) (14) Support rods (2a) (2b)
The support rod by the horizontal rod (1b) and the holding member (13).
When (2a) and (2b) are clamped, the upper surface of the horizontal rod (1b) and the clamping member
The lower surface of (13) is slightly separated by a distance (d) so as to be parallel to each other.

The lower surface of the holding member (13) other than the fitting groove (14) and the fitting groove of the horizontal rod (1b) of the leg (1).
On the top surface except (4), leaving a peripheral edge, a recess (1
6) (17) is formed. Further, a convex portion (18) facing downward is provided at the center of the peripheral portion of the lower surface of the sandwiching member (13) in the front-rear direction. The height of this convex portion (18) is the above distance (d).
Same as or slightly smaller.

Between the convex portion (18) on the lower surface of the holding member (13) and each fitting groove (14) which is a mounting portion of the support rods (2a) (2b),
Screw holes (19) (19) facing upward are drilled, and through holes (20) facing vertically are drilled on the upper surface of the horizontal rod (1b) of the leg body (1) facing them. Retain the set screw (21), which is the fastening means inserted through the through hole (20) from below, with the screw hole (19).
The horizontal rod (1b) and the sandwiching member (13) can be fastened to each other at two points close to both the support rods (2a) and (2b) by screwing into the.

In assembling, a plurality of brackets
Through hole (11) at the end of support rod (2a) (2b) welded to (5)
Is fitted to the projection (12) of the horizontal rod (1b) of the leg (1) and positioned, and the fitting groove (14) of the holding member (13) is provided on the upper part of the support rods (2a) (2b). After fitting, set screws (21) from the bottom of the horizontal rod (1b) in the vicinity of the support rods (2a) (2b) and insert them into the through holes (20).
(Figs. 4 and 6) and screw into the screw hole (19) (Fig. 3).

At this time, the upper surface of the horizontal rod (1b) and the holding member (13)
The lower surface of the abutment is in contact with the convex part (18) at the center in the front-rear direction, and the other parts are separated by a slight distance (d).
The tightening force by (21) is that the front and rear support rods (2a) have a moment arm half the length with the central convex part (18) as the fulcrum.
Since it acts on (2b) separately, the force acting by tightening is half that in the case without the convex portion (18), and unreasonable stress is applied to the horizontal rod (1b) and the sandwiching member (13). There is no. At the open end of the support rods (2a) (2b), the end cap (22)
Attach (Fig. 5).

The above steps are upside down with respect to FIG.
It is easier to work when the leg (1) is placed up. Middle leg
(1) can be attached in the same manner.

Then, as shown in FIG. 2, a set screw (8) is inserted from below the screw insertion holes (7) at the front and rear ends of the bracket (5), and the set screw (8) is attached to the seat plate (3). The seat plate (3) is attached by screwing. The seat cushion (9) and the backrest cushion (10) are attached to the seat plate (3) to complete the process.

As an option, as shown in FIG. 2, a holding member (2) provided with a column (24) having an armrest (23) on the upper portion thereof.
5), or the sandwiching member (28) provided with the column (27) having the tablet (26) on the upper part thereof can be used instead of the sandwiching member (13). In these cases, since the holding members (25) (28) are long in the front-rear direction, the support of the columns (24) (27) is stable.

Further, as shown in FIGS. 2, 8 and 9,
Instead of inserting the end cap (12) into the open ends of the support rods (2a) (2b), another support rod (29) can be extended here. At the end of this support rod (29), there is a connecting rod (30) inside it.
Are attached, for example, by welding (31), and the connecting rod (3
The vertical through screw hole (32) formed in (0) is aligned with the through hole (7) at the end of the support rods (2a) (2b) engaged with the protrusion (12), and stopped from above. The screw (33) is screwed in and connected. The support rod (29) is extended in this way, and the leg
If you install (1), you can add more seat plates (3).

Similarly, if the table support rod (34) shown in FIG. 2 is attached, the joint table (35)
Can be attached to the side of the seat plate (3).

Further, as shown in FIG. 2, the above-mentioned holding member (13) is provided at a plurality of lateral positions (only one position is illustrated in the drawing) of the front and rear two support rods (2a) (2b). With the same upper member (36), and the same structure as the horizontal rod (1b) described above, by the lower member (37) whose outer shape is vertically symmetrical with the upper member (36),
A holding member (38) for connecting to another connecting chair (furniture) is provided so as to hold both supporting rods (2a) (2b), and this upper member
Either (36) or lower member (37) (here, upper member (3
6)), another connecting chair arranged back to back (not shown)
By connecting an intermediate member (39) which is connected to a similar holding member (38) provided in the above, two rows of connecting chairs can be connected back to back.

The seat plate (3) is attached to the above bracket (5).
In place of the above, a sandwiching member including an upper member (36) and a lower member (37)
The same thing as (38) may be attached to the support rods (2a) and (2b).

[0030]

According to the invention as set forth in claim 1, the supporting rod and the leg in furniture such as a connecting chair can be firmly connected without generating excessive residual stress, and there is a risk of cracks or the like. Can be eliminated.

According to the second aspect of the present invention, the desired effect due to the convex portion can be obtained while reducing the weight of the legs and the like.

According to the third aspect of the present invention, the legs and the like can be firmly and reliably joined to the support rod.

According to the fourth aspect of the present invention, furniture such as two connecting chairs can be connected back to back easily and firmly.

[Brief description of drawings]

FIG. 1 is a perspective view of a connecting chair including an embodiment of the present invention.

FIG. 2 is likewise an exploded perspective view showing the right end portion of the connecting chair together with optional parts.

FIG. 3 is likewise an exploded perspective view of the vicinity of the right end portion of the connecting chair as seen from the lower front side.

FIG. 4 is an enlarged exploded perspective view showing a part of the portion shown in FIG. 3 in a further enlarged manner.

5 is an enlarged vertical sectional front view showing a state in which the parts shown in FIG. 4 are assembled.

FIG. 6 is likewise an enlarged side view of the upper part of the leg.

FIG. 7 is an enlarged vertical sectional front view taken along the line VII-VII of FIG.

FIG. 8 is an enlarged exploded perspective view similar to FIG. 4 in the case where another supporting rod is extended to the end of the supporting rod of the portion shown in FIG.

9 is an enlarged vertical sectional front view showing a state in which the parts shown in FIG. 8 are assembled.

[Explanation of symbols]

(1) Leg (1a) Leg rod (1b) Horizontal rod (lower member) (2a) (2b) Support rod (3) Seat plate (4) Mating groove (5) Bracket (6) Groove (support rod mounting part) (7) Screw insertion hole (seat plate mounting part) (8) Set screw (9) (10) Cushion body (11) Through hole (12) Protrusion (13) Clamping member (upper member) (14) Mating groove (15) Connection part (16) (17) Recess (18) Convex part (19) Screw hole (20) Through hole (21) Set screw (fastening means) (22) End cap (23) Armrest (24) Support (25) Holding member (26) Tablet (27) Support (28) Holding member (29) Support rod (30) Connecting rod (31) Welding (32) Screw through hole (33) Set screw (34) Table support rod (35) Joint table (36) Upper member (37) Lower member (38) Holding member (39) Intermediate member

Claims (4)

[Claims] 1. A pair of front and rear supporting rods supported by legs at a plurality of positions in the left-right direction and parallel to each other and spaced from each other. In the connection structure with legs or functional members,
The connecting portion of the leg or the functional member with the supporting rod is composed of an upper member and a lower member, and fitting grooves into which the lower surface sides of the front and rear supporting rods are fitted are provided in the front and rear portions of the upper surface of the lower member. And, the front and rear portions of the lower surface of the upper member are provided with fitting grooves into which the upper surfaces of the front and rear supporting rods are respectively fitted, and the front and rear supporting rods are fitted into the fitting grooves of the lower member and the upper member. The upper surface of the lower member and the lower surface of the upper member excluding the fitting groove are slightly separated from each other and are parallel to each other in a state of being sandwiched together, and either the lower surface of the upper member or the upper surface of the lower member. In the center part in the front-rear direction, a convex portion facing the facing surface is provided, and the upper member and the lower member are fastened to each other by a fastening means between the convex portion and both supporting rods. Structure for connecting support rods and legs in living furniture. 2. The lower member of the upper member or the upper member of the lower member is provided with a recess for lightening, and the protruding members are provided on the left and right peripheral portions of the recess of the lower member of the upper member or the upper member of the lower member. The connection structure of a support rod and legs in the furniture according to 1. 3. An upper member by providing a screw hole on the lower surface of the upper member, providing a through hole facing the screw hole in the lower member, and inserting a bolt into the screw hole by inserting the through hole. 3. The structure for connecting a support rod to a leg or the like in furniture according to claim 1, wherein the lower member and the lower member are connected to each other. 4. A sandwiching member for connecting to other furniture is formed by the upper member and the lower member, and at least one of the upper member and the lower member has a similar sandwiching member provided on the other furniture. The connection structure of a support rod and legs etc. in furniture according to any one of claims 1 to 3, wherein an intermediate member which is connected to a member is connected.