JP5378759B2 - Mounting structure of elbow member in chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair elbow member mounting structure that can well prevent the axes of the pivot points of a seat support plate and a backrest support member from dropping off without using a special clasp and that can have good appearance without exposing the pivot points outside. <P>SOLUTION: An upper connecting piece 4b that projects the pivotal attachment with the back end of a seat support plate 4 and the backrest support member 3 downward from the back end of the seat support plate 4 and a lower connecting piece 3c that is projected upward from the backrest support member 3 are axially fitted with a horizontal axis 13; a pair of right and left armrest members 7 are mounted on the backrest support member 3; the horizontal inside ends 7d of the armrest members 7 are provided facing each other with the right and left ends of the axis 13 from the outside in the horizontal direction. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an elbow member mounting structure in a chair.

  In the conventional chair, the front end portion of the backrest support rod provided with the backrest on the rear upper side of the seat is pivotally attached to the side portion of the support base, and the front end portion of the seat support plate is attached to the front end portion of the support base, The rear end of the seat support plate is pivotally attached to the back support rod, the armrest of the elbow member extends upward from the side of the back support rod, and the armrest is attached to the upper end of the armrest. Some are attached (for example, see Patent Document 1).

However, the chair described in Patent Document 1 requires a metal fitting for preventing the pivot from dropping off at the pivot part between the rear end of the seat support plate and the backrest support rod, and the pivot part is Since the mounting structure is exposed toward the side of the backrest support ridge, there is a problem that the appearance of the appearance is poor.
JP 2007-325696 A

  In view of the above-mentioned present situation, the present invention can prevent the pivot from dropping off at the pivotal attachment portion between the seat support plate and the backrest support rod without using a special metal fitting therefor, An object of the present invention is to provide an elbow member mounting structure in a chair that can improve the appearance of the appearance without exposing the wearing part to the outside.

  The above-described problems are solved by the invention having the following configuration, as described in each claim in the section “Claims”.

(1) The front end of the back support rod is pivotally attached to the base, the front end of the seat support plate is attached to the front end of the base, and the rear end of the seat support plate is pivotally attached to the back support rod. In the chair, the pivotal connection between the rear end portion of the seat support plate and the back support rod is made to protrude upward from the rear end portion of the seat support plate and the upper connection piece protruding upward from the back support rod. The lower connecting piece is attached by pivoting with a pivot that faces in the left-right direction, and the contact surface between the backrest support heel and the armrest heel is provided with a recessed portion in the vertical direction on one side and a protruding portion in the vertical direction on the other side. A screw that has a configuration in which the head is concealed from a lateral view in the left-right direction by providing these and fitting them from below and immersing the head of the screw into a recess provided on the lower surface of the backrest support rod. by fastening with a, the backrest support rod attached to a pair of left and right armrests rods, left and right sides of each armrest rod Of the inner end portion, respectively, from the outside of the left-right direction and the left and right ends of the pivot oppositely so disposed, the inner end portion and the left-right direction of the stopper of the pivot, and said inner end of said pivot axis armrest rod Be hidden by the part.

(2) (1) Oite the section drilled an upper connecting piece of the seat support plate, a shaft hole into both the lower connection piece of the backrest support rod, axially wear is inserted a pivot on the shaft hole In addition, a flange that protrudes outward or inward in the left-right direction is provided on the inner periphery of the shaft hole of the upper connecting piece.

( 3 ) In the above (1) or (2) , the front end of the seat support plate is attached to the front end of the support base so as to be movable in the front-rear direction.

According to the first aspect of the present invention, the upper connecting piece in which the pivotal connection between the rear end portion of the seat support plate and the backrest support rod projects downward from the rear end portion of the seat support plate, and the backrest support rod. A lower connecting piece that protrudes upward from the center is attached with a pivot that faces in the left-right direction, and a pair of left and right armrests is attached to the backrest support rod, and the inner ends in the left-right direction of each armrest rod Are arranged opposite to the left and right ends of the pivot from the outside in the left and right direction, so that when the pivot is displaced in either the left or right direction, the left end or right end of the pivot is the inner end of the armrest The inner end functions as a stopper of the pivot, and can prevent the pivot from falling off without using a special metal fitting.
In addition, since the pivoting portion of the rear end portion of the seat support plate and the backrest support rod is concealed by the inner end portion of the armrest rod, it is not exposed to the outside from the side of the backrest support rod, Appearance can be improved.

Furthermore, on the contact surface between the backrest support heel and the armrest heel, an up-down recessed portion is provided on one side, and an up-and-down protrusion is provided on the other side. Is attached to the backrest support rod, so that the attachment of the armrest rod and the backrest support rod becomes strong, and the stopper function for the pivot is also stably acted by the inner end of the armrest rod.

According to the second aspect of the present invention, a shaft hole is drilled in both the upper connecting piece of the seat support plate and the lower connecting piece of the backrest support rod, and the pivot is inserted into the shaft hole so that the shaft is attached. In addition, since a flange protruding outward or inward in the left-right direction is provided at the inner peripheral edge of the shaft hole of the upper connecting piece, the strength against the load applied to the inner peripheral edge of the shaft hole when a person is seated It is possible to improve the strength of the pivoting portion between the seat support plate and the back support rod.

According to the invention of claim 3 , since the front end portion of the seat support plate is attached to the front end portion of the support base so as to be movable in the front-rear direction, the follow-up operation of the seat support plate interlocked with the reclining operation of the backrest. Become smooth.

The present invention will be described in detail with reference to examples.
1 is a side view of a chair provided with an elbow member mounting structure of the present invention, FIG. 2 is a front view, and FIG. 3 is an enlarged view of a main part in the side view shown in FIG.

  As shown in these drawings, the chair according to the present invention has the front end portion of the backrest support rod 3 pivoted on the support base 2 supported on the upper end of the leg rod 1, and is seated on the front end portion of the support base 2. A front end portion of the support plate 4 is attached, and a rear end portion of the seat support plate 4 is pivotally attached to the backrest support rod 3.

  A seat 5 having a cushion function including a seat plate (not shown) is attached to the lower surface of the seat support plate 4.

A backrest 6 is disposed at the rear portion of the backrest support rod 3, and a pair of left and right armrest rods 7 are attached to the front of the backrest 6.
At the upper end of the armrest 7, an armrest 7 a that faces in the front-rear direction is provided.
The elbow member is composed of the armrest rod 7 and the armrest portion 7a.
A lever 8 that adjusts the height of the seat 5 is provided at the front end of the support base 2.

4 is an assembled perspective view of the support base 2, the backrest support rod 3, the seat support plate 4, and the armrest rod 7 provided with an armrest portion 7a at the upper end, and FIG. 5 is an exploded perspective view thereof. FIG. 6 is a perspective view for explaining a means for assembling the backrest support rod 3, the seat support plate 4, and the armrest rod 7.
7 is a plan view of the main part when the backrest support bar 3 is in a horizontal state, FIG. 8 is a vertical cross-sectional view taken along line VIII-VIII in FIG. 7, and FIG. 9 is a main part in the vertical cross-sectional view shown in FIG. It is an enlarged view.

  As shown in FIG. 5, the support base 2 has a substantially rectangular shape in plan view, and has a tank shape in which the thickness in the vertical direction gradually increases toward the rear portion. A shaft hole 2b is formed in the rear portion of the side surface 2a. A long hole 2c in the front-rear direction is drilled below.

  On the other hand, the backrest support rod 3 has a shape in which the center of the front end of a substantially rectangular metal plate in a plan view is notched in a substantially forward U shape toward the rear, and the left and right front ends of the notch 3a are A slightly larger attachment portion 3b having a substantially triangular shape when viewed from the side is provided, and a slightly smaller connecting piece 3c is provided so as to protrude upward at the base of the cutout portion 3a.

A shaft hole 3d is formed in the upper portion of the mounting portion 3b, a locking hole 3e is formed in the lower portion, and a shaft hole 3f is formed in the connecting piece 3c.
The rear portion of the support base 2 partially enters the U-shaped cutout portion 3a of the backrest support rod 3, and has a pair of left and right mounting portions 3b provided at the front end of the cutout portion 3a of the backrest support rod 3. In a form in which the rear portion of the base 2 is sandwiched, the positions of the shaft hole 2 b of the support base 2 and the shaft hole 3 d of the backrest support rod 3 are aligned, and the front end of the backrest support rod 3 is supported by the shaft 9. It is pivotally attached to group 2.

  A pin 10 is locked in the locking hole 3e of the mounting portion 3b of the backrest support rod 3, and this pin 10 is engaged with and guided by the long hole 2c of the support base 2, and the left and right ends of the long hole 2c. The backrest support rod 3 is rotatable with respect to the support base 2 within a range in contact with the support base 2.

At the front end of the support base 2, there is pivotally mounted an operating rod 8a to which a lever 8 for adjusting the seat 5 up and down is attached to one of the left and right, and the other is a lever 11 for adjusting the reclining of the backrest. An operating rod 11a to which is attached is pivotally attached.
At the upper part of the mounting pipe 2d for these operating rods 8a and 11a, a mounting portion 2e is erected and a shaft hole 2f is drilled.

On the other hand, the seat support plate 4 has a shape in which the center of the front and rear ends is shallowly cut out in a U shape in plan view, and the left and right ends of the front end cutout portion 4a have downward mounting portions 4c and rear end cutouts. The left and right ends of the portion 4b are provided with connecting pieces 4d that protrude downward. The attachment portions 4c and the connecting pieces 4d are respectively provided with shaft holes 4e and 4f.
The position of the shaft hole 4e of the mounting portion 4c of the seat support plate 4 and the position of the shaft hole 2f of the mounting portion 2e of the support base 2 are aligned, and the front end of the seat support plate 4 is connected to the support base 2 with the shaft 12. It is pivotally attached to the front end.
A shaft hole 4f of a pair of left and right connecting pieces (upper connecting piece) 4d provided at the rear end of the seat support plate 4, and a shaft of a pair of left and right connecting pieces (lower connecting piece) 3c provided in the backrest support rod 3. The rear end portion of the seat support plate 4 and the backrest support rod 3 are pivotally attached by aligning the position with the hole 3f and pivotally attaching with the pivot shaft 13 facing in the left-right direction.

As shown in FIG. 9, a flange 4 g that protrudes outward in the left-right direction is provided on the inner peripheral edge of the shaft hole 4 f of the connecting piece 4 d in the seat support plate 4.
The flange 4g improves the strength against a load applied to the inner peripheral edge of the shaft hole 4f when a person is seated. The flange portion 4g may protrude inward in the left-right direction.

  The armrest 7 has an L shape that opens inward in the left-right direction when viewed from the front, and is provided with an armrest 7 a in the front-rear direction at the upper end.

  As shown in FIGS. 6 and 7, triangular projections 7 b facing outward in the left-right direction are provided in the vicinity of the inner end of the lower surface of the armrest 7 as shown in FIGS. 6 and 7. 7c is screwed.

On the other hand, a pair of left and right triangular recesses 3g corresponding to the projecting portions 7b are provided on the upper surface of the back support rod 3 in the vicinity of the outer side in the left-right direction of the connecting piece 3c. 3h is drilled.
The protrusion 7b of the armrest 7 is fitted into the recessed portion 3g of the backrest support 3 from above, and the screw 14 is screwed into the screw hole 7c through the through hole 3h from below and fastened. As a result, the armrest 7 is firmly attached to the backrest support 3.

  As shown in FIG. 9, the inner end 7d in the left-right direction of the armrest 7 is opposed to the left and right ends 13a of the pivot 13 from the outer side in the left-right direction, and the pivot 13 is displaced in either the left-right direction. In addition, the left end 13a or the right end 13a of the pivot 13 abuts against the inner end 7d of the armrest 7 and this inner end 7d functions as a stopper, and the rear end of the seat support plate 4 and the backrest support 3 The inner end 7d of the armrest 7 is disposed close to the left and right ends 13a of the pivot 13 so that the pivotal attachment state can be satisfactorily maintained.

  The facing surface of the inner end 7d of the armrest 7 has a substantially rectangular shape that is flat when viewed from the side, and has an area larger than the area of the left and right ends 13a of the pivot 13.

As shown in FIGS. 5 to 7, the inner end portion 7 d is notched in a U-shape facing inward in the left-right direction in a plan view, and the left and right ends 13 a of the pivot shaft 13 enter the notch portion 7 e. And the pivot part is protected.
The backrest 6 is attached to the rear portion of the backrest support rod 3 by inserting an L-shaped mounting bracket (not shown) through a screw and a through hole 3i of the backrest support rod 3 from below. The mounting bracket is attached by fastening to the mounting bracket, and the backrest 6 is attached to the mounting bracket.

  Further, in the present embodiment, when the backrest 6 is reclined rearward, the front end portion of the support base 2 rotates obliquely rearward and upward, and the seat support plate 4 moves rearward.

  However, as another embodiment, for example, a long hole in the front-rear direction is provided in the pivotal connection portion between the front end portion of the seat support plate 4 and the front end portion of the support base 2, and the seat support plate 4 is attached to the support base 2. It is also arbitrary to make it relatively movable in the front-rear direction.

It is a side view of a chair provided with the attachment structure of an elbow member of the present invention. It is a front view. It is a principal part enlarged view in the side view shown in FIG. FIG. 4 is an assembled perspective view of a support base, a backrest support rod, a seat support plate, and an armrest rod provided with an armrest portion at the upper end. It is a disassembled perspective view of a support base, a backrest support rod, a seat support plate, and an armrest rod provided with an armrest portion at the upper end. It is a perspective view for showing a means for assembling the backrest support rod, the seat support plate 4, and the armrest rod. It is a principal part top view when a backrest support rod is made into a horizontal state. It is the VIII-VIII line longitudinal cross-sectional view in FIG. It is a principal part enlarged view in the longitudinal cross-sectional view shown in FIG.

DESCRIPTION OF SYMBOLS 1 Leg rod 2 Support base 2a Side surface 2b Shaft hole 2c Long hole 2d Mounting pipe 2e Mounting part 2f Shaft hole 3 Backrest support rod 3a Notch part 3b Mounting part 3c Connecting piece (lower connecting piece)
3d Shaft hole 3e Locking hole 3f Shaft hole 3g Recessed part 3h, 3i Through hole 4 Seat support plate 4a, 4b Notch part 4c Mounting part 4d Connecting piece (upper connecting piece)
4e, 4f Shaft hole 4g collar part 5 seat 6 backrest 7 armrest collar 7a armrest part 7b protruding part 7c screw hole 7d inner end part 7e notch part 8 lever 8a actuation rod 9 axis 10 pin 11 lever 11a actuation collar 12 axis 13 pivot 13a Left end or right end 14 screw

Claims (3)

In a chair in which the front end portion of the backrest support rod is pivotally attached to the support base, the front end portion of the seat support plate is attached to the front end portion of the support base, and the rear end portion of the seat support plate is pivotally attached to the backrest support rod. An upper connecting piece projecting downward from the rear end of the seat support plate and a lower connecting piece projecting upward from the back support kit. Are attached to the abutment surface of the backrest support heel and the armrest heel by providing a vertical recess on one side and a vertical projection on the other side. From below, the head of the screw is immersed in a recess provided on the lower surface of the backrest support rod, and the head is fastened with a screw that is concealed from side view in the left-right direction. it allows mounting a pair of right and left armrests rods backrest support rod, the right and left directions of each armrest rod The side end portion, and from the outside in the lateral direction is disposed opposite respectively the left and right ends of the pivot, the inner end portion and the left-right direction of the stopper of the pivot, and the inner end portion of the pivot axis armrest rod An elbow member mounting structure in a chair, wherein the elbow member is concealed by the chair. A shaft hole is formed in both the upper connecting piece of the seat support plate and the lower connecting piece of the back support rod, and a pivot is inserted into the shaft hole so as to be attached to the shaft. mounting structure of the elbow member in the chair according to claim 1 provided with a flange portion protruding outward or inward in the lateral direction to the periphery. The attachment structure of the elbow member in the chair according to claim 1 or 2 , wherein the front end portion of the seat support plate is attached to the front end portion of the support base so as to be movable in the front-rear direction.

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