JP3707033B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair in which an armrest mounting portion formed on the lower portion of an armrest body is mounted on a lower surface of a seat shell with a bolt, and more particularly to the structure of an armrest mounting portion of such a chair.
[0002]
[Prior art]
Conventionally, as well as continuously provided an armrest attachment portion from the lower portion of the armrest body, contact the upper surface of the armrest attachment portion on the lower surface of both sides of the seat shell, through the bolts from below the armrest attachment portion, formed on the seat shell A chair is known in which an armrest is attached to a seat shell by being screwed into the female thread portion.
[0003]
[Problems to be solved by the invention]
In a conventional chair, such as this, along with the metal portion of the head or the like of the armrest attachment portion and the bolt for mounting, will be exposed to the outside of the plastic seat shell, appearance is deteriorated, the seated person If you extend your hand to the back of the seat for lever operation such as adjusting the vertical position of the seat, the hand touches the armrest mounting part or the head of the bolt, and misidentifies it as a lever, giving a bad feel with unevenness There is a problem that.
[0004]
In order to solve such problems, an object of the present invention is to provide a chair in which an armrest mounting portion is covered with a lower cover that can be easily mounted.
[0005]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) In a chair in which an armrest mounting portion connected to the lower portion of the armrest body is attached to the lower surface of the seat shell with a bolt, the armrest mounting portion is connected to the lower surface of the seat shell and the end of the armrest body. A mounting plate having a side surface portion welded to the inner surface with a reinforcing rod having an engagement hole formed on the outer surface, and a plurality of engagement members are attached to the seat shell at or near the armrest mounting portion. By forming engagement holes corresponding to these engagement holes and having a lower cover having a shape that covers the armrest mounting portion, the engagement holes are locked with the engagement claws. , Ru attached to the armrest attachment portion.
[0006]
(2) In the above item (1), an engagement hole is formed in each of the front and rear portions of the armrest mounting portion, and an elastic engagement piece having an engagement claw for engaging with the engagement hole is provided on the lower cover. Stand on the top.
[0007]
( 3 ) In the above item ( 1 ) or ( 2 ) , the inner end portion of the upper surface portion of the mounting plate is bent downward, and the bent portion is welded to the upper surface of the reinforcing rod.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an outline of an embodiment of the present invention. As is apparent from this figure, the left and right side portions of a seat shell (1a) made of synthetic resin that constitutes the bottom of the seat (1) of the chair. The armrest main body (2) is attached by a bolt (3), and this attachment portion is covered by a lower cover (4).
[0009]
This structure will be described with reference to FIG.
Armrest struts of the main body (2) (5), Ri Do from oval cross section pipe member, its lower end inwardly, i.e. turn the seat shell (1a) side, as indicated by dotted lines, it is cut vertically It is over.
[0010]
Armrest attachment portion (6) steel mounting plate which is one of the major components of (7), before and after two bolt mounting holes (8) of the upper surface portion which is bored and (7a), the upper surface portion (7a ) And a side portion (7b) extending downward from the outer end, and a bent portion (7c) extending downward from the inner end of the upper surface portion (7a).
[0011]
The outer surface of the side portion of the mounting plate (7) (7b), the cut end portion of the above-mentioned strut (5) have abutment as the long axis of the oval is inclined downward slightly before welding Has been. ( W1 ) in FIG. 3 is this weld.
In this manner, the armrest mounting portion (6) is continuously provided at the lower portion of the armrest body (2).
[0012]
The inner surface of the side portion of the mounting plate (7) (7b), the outer end is abutted steel reinforcement rods which cross-sectional shape faces the lateral direction without a downward U-shaped (9), welding portion Welded by ( W2 ) . Further, the lower end of the bent portion (7c) is abutted against the upper surface of the reinforcing rod (9) and is welded by the welded portion ( W3 ) .
[0013]
The inner end close to the top surface of the reinforcing rod (9) is a bolt hole (13) is bored and the upper corner portions of the front and rear reinforcing rod (9), of two each lateral engaging holes (10) (10) is drilled.
[0014]
The lower cover (4) made of synthetic resin has a shape that covers the entire lower surface of the armrest mounting portion (6), and corresponds to the engagement hole (10) of the reinforcing rod (9) described above. An elastic engagement piece (12) having an engagement claw (11) at its upper end is erected. The length of the elastic engagement piece (12) is substantially equal Ku length before and after suspending piece of cross section downwardly U-shaped reinforcing rod (9) (9a) (9a).
[0015]
As mentioned above, the armrest attachment portions provided continuously to the lower end of the strut (5) of the armrest body (2) (6) is a bolt hole (8) of the mounting plate (7) and the reinforcing rod (9) (13 ) Are inserted into the seat (1) by inserting bolts (3) into the seat shell (1a) which is the core of the seat (1).
Next, the lower cover (4) is inserted into the armrest mounting portion (6) from below, and the lower cover (10) is inserted into the front and rear engaging holes (10) of the reinforcing rod (9) fixed to the seat shell (1a). The engaging claw (11) at the upper end of the elastic engaging piece (12) erected inside 4) is hooked and locked. Then, the lower cover (4) covers the entire lower surface of the armrest mounting portion (6) exactly.
[0016]
In the above-described embodiment, the lower end portion of the support column (5) is welded to the outer side surface of the side surface portion (7b) of the mounting plate (7), and the inner side surface of the side surface portion (7b) of the mounting plate (7) is reinforced. Although the flange (9) is welded, the lower end portion of the column (5) itself may be elongated and the extension may have the same function as the reinforcing rod (9).
Further, the engagement hole (10) may be formed at a suitable position in the seat shell (1a) near the reinforcement rod (9) without being provided in the reinforcement rod (9).
[0017]
【The invention's effect】
According to the first aspect of the present invention, by locking the engaging claw in the engaging hole, the armrest mounting portion can be easily covered with the lower cover, and the armrest mounting portion and the mounting bolt It can be a nice-looking chair with no head exposed.
In addition, even when a seated person in the chair extends his hand to the back of the seat for lever operation such as vertical adjustment of the seat, the armrest mounting part and the head of the bolt are covered with the lower cover, They will not be mistaken for a lever, or will not give a rough feel. In addition, there is no protrusion due to the head of the bolt, so safety is high.
In addition, the armrest mounting portion has an upper surface portion that abuts the lower surface of the seat shell, an end portion of the armrest body on the outer surface, and a side surface portion welded to the inner surface with a U-shaped reinforcing rod having an engagement hole. Therefore, the structurally strong armrest mounting portion can be configured with high accuracy.
[0018]
As in the second aspect of the present invention, the engagement holes are formed in the front and rear portions of the armrest mounting portion, and the elastic engagement pieces having the engagement claws that engage with the engagement holes are provided on the lower cover. When standing from the upper surface, the engaging claw locks the armrest mounting portion from the front and rear surfaces thereof to the engaging hole, so that the lower cover is securely attached, and the presence of the elastic engaging piece makes the engaging claw Engagement is facilitated.
[0019]
As in the third aspect of the invention, when the inner end of the upper surface portion of the mounting plate is bent downward and the bent portion is welded to the upper surface of the reinforcing rod, the coupling strength between the mounting plate and the reinforcing rod can be increased. it can.
[Brief description of the drawings]
FIG. 1 is an exploded side view showing a part of an embodiment of the present invention.
FIG. 2 is an enlarged exploded perspective view of a main part viewed from the upper side in the same manner .
3 is a longitudinal side view taken along line III-III of FIG. 2 in an assembled state.
[Explanation of symbols]
( W1 ) ( W2 ) ( W3 ) weld
(1) Seat
(1a) Seat shell
(2) Armrest body
(3) Bolt
(4) Lower cover
(5) Prop
(6) Armrest attachment
(7) Mounting plate
(7a) Top surface
(7b) Side surface
(7c) Bending part
(8) Bolt hole
(9) Reinforcement rod
(10) Engagement hole
(11) Engaging claw
(12) Elastic engagement piece
(13) Bolt hole

Claims (3)

In a chair in which an armrest mounting portion connected to the lower portion of the armrest main body is attached to the lower surface of the seat shell with a bolt, the armrest mounting portion is attached to the upper surface portion contacting the lower surface of the seat shell and the end portion of the armrest main body is removed. A mounting plate having a side surface and a side surface welded to the inner surface of a reinforcing rod having an engagement hole formed therein, and a plurality of engagement holes are formed in the seat shell at or near the armrest mounting portion. A lower cover having a shape that is perforated and that corresponds to the engagement holes and that covers the armrest mounting portion is engaged with the engagement claw in the engagement holes, thereby A chair characterized by being attached to a mounting portion.   An engagement hole is formed in each of the front and rear portions of the armrest mounting portion, and an elastic engagement piece having an engagement claw for engaging with the engagement hole is provided on the upper surface of the lower cover. The chair according to claim 1. The chair according to claim 1 or 2, wherein an inner end portion of the upper surface portion of the mounting plate is bent downward, and the bent portion is welded to the upper surface of the reinforcing rod.

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