JP2010094362A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To permit the position of a seat body to be easily adjusted by simultaneously and smoothly engaging and disengaging engagement portions with and from engaged portions provided on the right and left, respectively by a single operating lever without complicating the structure. <P>SOLUTION: A seat support 6 is provided with a pair of right and left rail portions 13 facing from front to rear, each of the rail portions 13 is provided with a plurality of engaged portions 16e to ensure that the engagement direction of a seat body 7 with the engagement portion 26a faces the same direction of rightward or leftward. An adjustment rod 22 facing from left to right which is attached to the underside of the seat body 7 rightward and leftward movably is provided with a pair of right and left engagement portions 26a which are permitted to engage with and disengage from one of the engaged portions 16e in the right and left rail portions 13. The chair permits the pair of right and left engagement portions 26a to be engaged with and disengaged from the engaged portions 16e simultaneously by moving the adjustment rod 22 rightward and leftward. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a chair in which a seat body can be moved and adjusted in the front-rear direction with respect to a seat support provided on an upper portion of a leg.

As this type of chair, the seat body is supported so as to be movable in the front-rear direction with respect to the seat support body, and an engaging portion formed on the seat body by operating the operation lever and a plurality of seat support bodies formed on the seat support body. The technology for engaging / disengaging the engaged portion and adjusting the seat body in the front-rear direction is known, and many products have been developed.
In this case, from the viewpoint of improving the right and left balance of the seat body, the engaging portion of the seat body and the engaged portions of the seat support body are respectively provided on the left and right side portions of the chair. A structure is desirable.

  As means for engaging / disengaging the pair of left and right engaging portions and the engaged portion, there is one in which operation levers are provided on both the left and right sides of the chair (see Patent Document 1).

  However, when operating levers are provided on both the left and right sides, the two operating levers must be operated simultaneously. However, this operation is generally difficult, and it is practical to smoothly engage and disengage the left and right sides simultaneously. is not.

  In Patent Documents 2 and 3, the left and right guide portions guide the seat body so as to be movable in the front-rear direction with respect to the seat support body, or the vicinity of the left and right guide portions, the engaging portion and the covered portion. A chair provided with an engaging portion is disclosed.

However, applying the structure of the chair described in Patent Documents 2 and 3 to provide the engaging portion and the engaged portion on the left and right is difficult to synchronize the left and right, and the seat support body Since the engaging portion of the seat body can be engaged from the inside in the left-right direction with respect to the engaged portion of the It is necessary to bias the engaging portion biased in the direction of engagement with the portion in a different direction, resulting in a very complicated structure.
Further, since the engagement / disengagement between the engaging portion and the engaged portion involves the movement of the engaging portion in the left-right direction, the vertical position of the engaging portion and the engaged portion can be adjusted to be optimal. Is required.
JP 2004-049655 A JP 2002-223886 A Japanese National Patent Publication No. 11-506663

  In view of the above-described present situation, the present invention can smoothly and smoothly engage and disengage the engaging portions and the engaged portions provided on the left and right by a single operation lever without using a complicated structure. An object of the present invention is to provide a chair that can easily adjust the position of the body.

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

(1) The seat body is supported so as to be movable in the front-rear direction with respect to the seat support body, and the engaging portions formed on the seat body are selectively engaged with a plurality of engaged portions formed on the seat support body. Thus, in the chair that can stop the seat body at a plurality of positions in the front-rear direction, the seat support body is provided with a pair of left and right rail parts facing the front-rear direction, and each rail part is provided with an engaging part of the seat body. By providing a plurality of engaged portions so that the engaging direction faces the same one of the left and right directions, the engaged portions are formed on the seat support and the left and right directions on the lower surface of the seat By attaching a pair of left and right engaging portions that can be engaged with and disengaged from each of the engaged portions of the left and right rail portions to the adjustment rod that is movably attached to the left and right rail portions, By providing a joint and moving the adjusting rod in the left-right direction, As to be carried out engagement and disengagement between the engaging portion and the engaged portion of the same time.

(2) In the above item (1), an operating lever that engages and disengages the engaging portion and the engaged portion is connected to one end portion of the adjusting rod by moving the adjusting rod in the left-right direction.

(3) In the above item (1) or (2), the adjusting rod is provided with an accommodating portion for accommodating a compression spring as urging means.

(4) In any one of the above items (1) to (3), a guide portion is provided on the lower surface of the seat body so that the adjustment rod can be moved in the left-right direction and cannot be moved in the front-rear direction.

(5) In the above item (4), the guide portion that allows the adjustment rod to move in the left-right direction and not to move in the front-rear direction is formed by providing a pair of front-rear front-rear ribs on the lower surface of the seat body. The front and rear ribs are provided on the lower surface of the seat body as a rail receiving portion, and the lower end of the rib is supported so that it can slide on the rail portion. The lower end of the rib that forms the guide portion is the lower end of the rib that forms the guide portion at the portion where the rib that forms the rail receiving portion and the rib that forms the guide portion intersect with each other. And the same or below.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, the seat support body is provided with a pair of left and right rail portions facing in the front-rear direction, and each of the rail portions has an engagement direction with the engagement portion of the seat body in any of the left and right directions. By providing a plurality of engaged portions so as to face either of the same directions, the engaged portions are formed on the seat support body, and the left and right directions are attached to the lower surface of the seat body so as to be movable in the left-right direction. The adjustment rod is provided with a pair of left and right engagement portions that can be engaged with and disengaged from each of the engaged portions of the left and right rail portions, so that the seat body is provided with an engagement portion, and the adjustment rod is By moving in the direction, the pair of left and right engaging parts and engaged parts can be engaged and disengaged at the same time. Engagement and disengagement of the engaged part and engaged part simultaneously and smoothly Go and can be easily adjusting the position of the seat body.

  According to the second aspect of the present invention, since the adjustment lever is moved in the left-right direction to the one end portion of the adjustment rod, an operation lever for engaging and disengaging the engaging portion and the engaged portion is connected. The unitized adjustment rod and operating lever can be assembled to the seat with a simple structure.

  According to the third aspect of the present invention, the adjusting rod is provided with the accommodating portion that accommodates the compression spring as the urging means, so that the adjusting rod is engaged from the released state of the engaging portion and the engaged portion. When returning to the combined state, a bending of the compression spring which is to be bent downward is received by the housing portion, and it is possible to avoid the displacement of the compression spring mounting site due to the repetition of this bending operation.

  According to the fourth aspect of the present invention, since the guide portion is provided on the lower surface of the seat body so that the adjustment rod can be moved in the left-right direction and cannot be moved in the front-rear direction, rattling of the adjustment rod is prevented. And the adjusting rod can be moved quickly and stably.

  According to the fifth aspect of the present invention, the guide portion that allows the adjustment rod to move in the left-right direction and not to move in the front-rear direction is formed by providing a pair of front-rear front-rear ribs on the lower surface of the seat body. The front and rear ribs are provided on the lower surface of the seat body as a rail receiving portion, and the lower end of the rib is supported so that it can slide on the rail portion. The lower end of the rib that forms the rail receiving portion is the same as the lower end of the rib that forms the guide portion at the portion where the rib rib that forms the rail receiving portion and the rib that forms the guide portion intersect with each other. Or since it is located below, the adjustment rod can be assembled to the guide portion of the seat body with a simple structure, and the adjustment rod can be moved smoothly in the left-right direction.

Hereinafter, the present invention will be described with reference to representative embodiments.
1 and 2 are a side view and a front view, respectively, of a chair embodying the present invention.

In the chair 1, a support base 3 is attached to the upper end of the leg 2, and a back rod 4 and a seat support rod 5 are pivotally supported on the support base 3.
The seat support 6 is supported by the back support 4 and the seat support support 5, and the seat 7 is supported by the seat support 6.
The seat body 7 is configured by attaching a cushion body 9 to the upper surface of the seat plate 8.

A backrest 10 is supported behind the seat body 7 by a backrest 4 so as to be reclining.
The seat body 7 is moved back and forth by the reclining of the backrest 10, and the seat body 7 is supported so as to be movable in the front-rear direction with respect to the seat support body 6.
An operation lever 11 is provided below the seat body 7, and by operating the operation lever 11, the front-rear position of the seat body 7 with respect to the seat support body 6 can be adjusted.

3 is a lower perspective view of the seat supported by the seat support, FIG. 4 is a lower perspective view of the seat with the operating means removed, and FIG. 5 is an exploded perspective view of the seat support and the seat. 6 is an end view taken along the line VI-VI in FIG. 3, FIG. 7 is an enlarged view of the main part in the chain line VII in FIG. 6, FIG. 8 is a cross-sectional view taken along the line XIII-XIII in FIG. 8, FIG. 10, FIG. 12, and FIG. 14 are enlarged views of main parts in the dashed-dotted circles X, XII, and XIV in FIG. 8, respectively, and FIGS. 11, 13, and 15 are dashed-dotted lines in FIG. It is a principal part enlarged view in circle XI, XIII, and XV.
However, FIG. 6 to FIG. 8, FIG. 10, and FIG.

  As shown in FIGS. 3 and 5 to 7, the seat support 6 is provided with a pair of front and rear rail portions 13 and 13 on the base portion 12 in the left and right direction, and on the rail portion 13. A pair of left and right rail receiving portions 14 and 14 facing in the front-rear direction are supported on the lower surface of the seat body 7 so as to be slidable in the front-rear direction.

As shown in FIG. 5, the rail portion 12 is formed by fixing an upper surface plate 16 having a flat surface 16 a on the upper surface with screws 17 on a rail base 15 in the front-rear direction.
The rail base 15 is provided with a concave portion 15a having a substantially rectangular shape in a plan view that is long in the front-rear direction.

The left and right outer end portions of the flat surface 16a of the upper surface plate 16 are bent into an inverted L shape facing outward when viewed from the front, and an engagement piece 16b is formed.
On the other hand, the inner end portion of the flat surface 16a is bent downward to form a downward piece 16c.
The flat surface 16a of the upper surface plate 16 is provided with an opening 16d having a substantially rectangular shape in plan view penetrating in the vertical direction at a position corresponding to the recess 15a of the rail base 15.

  The opening 16d has a claw-like engagement with one rail portion 13 on the inner peripheral end surface in the left-right direction and the other rail portion 13 with the inner peripheral end surface in the left-right direction. A plurality of parts 16e are provided in the front-rear direction.

The upper surface plate 16 is fixed on the rail base 15 in a state where the positions of the recesses 15 a of the rail base 15 and the openings 16 d of the upper surface plate 16 are aligned.
As a result, the flat surface 16a of the rail portion 13 is formed with an opening portion 16d that opens upward and is closed front and back.

As shown in FIGS. 3 and 4, on the lower surface of the seat body 7, a pair of left and right rail receiving portions 14, 14 are formed corresponding to the pair of left and right rail portions 13, 13 of the seat support 6. .
The rail receiving portion 14 is formed by a plurality of front and rear ribs 18 and left and right ribs 19 connecting the ribs 18.

As shown in FIG. 7, a rib 20 is provided outside the rib 18 in the vicinity of the outer rib 18 a among the plurality of ribs 18 in the front-rear direction, and a plurality of engagement pieces 20 a facing inward are provided at the lower end of the rib 20. By projecting at an appropriate interval in the front-rear direction, the rib 20 has a partially upright L-shape toward the front-rear direction, and has the upright L-shaped rib 20 and the outer rib 18a. The engaging groove 21 is formed so that at least the rear can be opened.
In the present embodiment, the engaging piece 16b and the engaging groove 21 are provided on the outer side portions in the left and right directions of the rail portions 13 and 13 and the rail receiving portions 14 and 14, respectively. You may provide in an inner part, respectively.

The seat 7 is assembled to the seat support 6 and supported so as to be movable in the front-rear direction as follows.
While moving the rear end portion of the rail receiving portion 14 provided on the lower surface of the seat body 7 from the front end side of the rail portion 13 in the seat support body 6 toward the rear, on the flat surface 16a on the upper portion of the rail portion 13, The lower end of the rib 18 forming the rail receiving portion 14 is supported so as to be slidable, and the engaging piece 16b formed on the outer side in the left and right direction of the rail portion 13 is the outer side portion of the rail receiving portion 14 in the left and right direction. The engagement groove 21 formed by the outer rib 18a and the upright L-shaped rib 20 is engaged so as to be positioned above the engagement piece 20a.
Thereby, the seat body 7 can be assembled on the seat support body 6 so as to be movable in the front-rear direction while preventing the seat body 7 from moving in the left-right direction.

An operation lever 11 is provided below the seat body 7, and by operating the operation lever 11, the front-rear position of the seat body 7 with respect to the seat support body 6 can be adjusted.
The output generated by the operation of the operation lever 11 is transmitted by the adjusting rod 22 that is interlocked with the operation lever 11.

The operation means 23 includes the operation lever 11 and the adjustment rod 22.
The adjusting rod 22 is movable in the left-right direction and substantially immovable in the front-rear direction in a guide portion 25 formed by a pair of front-rear left-right ribs 24, 24 provided on the lower surface of the seat body 7. It is arranged.

  At the portion where the rib 18 forming the rail receiving portion 14 and the rib 24 forming the guide portion 25 intersect, the lower end of the rib 18 forming the rail receiving portion 14 is the lower end of the rib 24 forming the guide portion 25. It is the same or located below.

As shown in FIGS. 8 and 9, the adjustment rod 22 of the seat body 7 forms a plate-like body facing in the left-right direction, and is curved so that the portion intersecting with the rail portion 13 is located slightly above, An engaging base portion 26 including an engaging portion 26 a that can engage with the engaged portion 16 e of the rail portion 13 is provided downward in this portion.
That is, the adjustment rod 22 has a pair of left and right engaging portions 26a, 26a that can be engaged with and disengaged from each of the engaged portions 16a provided on the pair of left and right rail portions 13, 13 of the seat support 6. Is provided.

The engaging direction of the pair of left and right engaged portions 16e of the rail portion 13 and the pair of left and right engaging portions 26a of the adjusting rod 22 is formed so as to face either one of the left and right directions.
For this reason, by moving the adjusting rod 22 in the left-right direction, the pair of left and right engaging portions 26a and the engaged portion 16e can be simultaneously engaged and disengaged.
This engagement / disengagement is performed below the flat surface 16a of the rail portion 13 or at the same height as the flat surface 16a.

As shown in FIGS. 8 to 11 and 13, the adjustment rod 22 is supported on a pair of left and right rail portions 13 and 13, and the rail portion 13 is positioned below the guide portion 25. Engagement / disengagement between the engaged portion 16e provided in the opening portion 16d in the flat surface 16a on the upper surface of the engagement portion and the engaging portion 26a provided in the engagement base portion 26 formed downward from the adjustment rod 22 is performed in the opening portion 16d. This is performed at a position below the upper surface of the inner rail portion 13.
As a result, the engagement base portion 26 comes into contact with the front and rear inner peripheral end surfaces of the opening portion 16d, and the sliding limit of the seat body 7 with respect to the seat support body 6 is restricted, and at least one of the left and right sides of the opening portion 16d is restricted. By selectively engaging the engaging portions 26a of the adjusting rod 22 with the plurality of engaged portions 16e provided on the inner peripheral end surface, the seat body 7 is moved in the front-rear direction with respect to the seat support body 6. Can be stopped in position.

  One end of the adjustment rod 22 is provided with a connecting portion 27 with the operation lever 11. The connecting portion 27 has side plates 27a and 27a provided upright at the front and rear edges of one end of the adjusting rod 22 to form an upward U-shape. The side plate 27a has a long hole A28 extending in the left-right direction and the long hole A28. Is formed by drilling a long hole B29 extending inward and downward.

  On the other hand, the operating lever 11 is provided so as to be able to turn around the pivot 30 in the front-rear direction provided on the seat body 7, and the pivot 30 is inserted into the elongated hole A 28 of the connecting portion 27 in the adjustment rod 22. It is inserted.

  At the non-operating side end of the operating lever 11, there is provided a locking portion 11 a that is locked to the elongated hole B 29 of the connecting portion 27 of the adjustment rod 22. By guiding the stop portion 11a with the long hole B29, the adjusting rod 22 slides to the left and right.

  As shown in FIG. 14 and FIG. 15, the adjustment rod 22 is always urged so that the engaging portion 26 a provided on the adjustment rod 22 is engaged with the engaged portion 16 e of the rail portion 13. A biasing means 31 is provided.

As shown in FIGS. 8, 14, and 15, the adjusting rod 22 is provided with a housing portion 32 that houses a compression spring as the biasing means 31 at the center in the left-right direction.
The accommodation portion 32 is formed with a rectangular opening 32 in plan view that penetrates the adjustment rod 22 in the vertical direction, and covers the opening 32 from below with a box-like body 32b that opens upward. It is shaped like a left half of the bottom.
A locking projection 32d protrudes rightward on the left side wall 32c on which the bottom is not provided.

On the other hand, the lower surface of the seat body 7 is provided with a locking piece 33 provided with a locking projection 33a that protrudes leftward so as to face the locking projection 32d. Are respectively engaged with the locking projections 32d and 33a and interposed between the locking projections 32d and 33a.

The adjustment spring 22 is always urged by the compression spring 31 in the direction in which the engaging portion 26a is engaged with the engaged portion 16e, and the engagement is released when the operation lever 11 is operated. The seat body 7 is movable in the front-rear direction with respect to the seat support body 6, and is released from the operation lever 11 to be engaged again by the urging force of the compression spring 31.
Therefore, the engaging lever 26a and the engaged portion 16e are engaged and disengaged by the operation lever 11, the front and rear positions of the seat body 7 are fixed to and released from the seat support body 6, and the position adjustment is easily performed. Can do.

  Further, since the accommodating portion 32 that accommodates the compression spring 31 as the biasing means is provided in the adjusting rod 22, the adjusting rod 22 is engaged from the released state of the engaged portion 16e and the engaging portion 26a. When returning, the bending of the compression spring 31 to be bent downward is received by the housing portion 32, and the displacement of the attachment site of the compression spring 31 due to repetition of this bending operation can be avoided.

It is a side view of the chair which implemented this invention. Similarly, it is a front view of a chair. It is a downward perspective view of the seat supported by the seat support. It is a downward perspective view of the seat which removed the operation means. It is a disassembled perspective view of a seat support body and a seat body. FIG. 6 is an end view (partially indicated by imaginary lines) of the VI-VI line in FIG. 3. FIG. 7 is an enlarged view of a main part in a dashed-dotted line circle VII in FIG. 6 (partially indicated by an imaginary line). FIG. 4 is a sectional view taken along line XIII-XIII in FIG. 3 (partially indicated by imaginary lines). It is a bottom view of FIG. It is a principal part enlarged view in the dashed-dotted line circle | round | yen X in FIG. 8 (a part is shown with a virtual line). It is a principal part enlarged view in the dashed-dotted line circle XI in FIG. It is a principal part enlarged view in the dashed-dotted line circle XII in FIG. 8 (a part is shown with a virtual line). It is a principal part enlarged view in the dashed-dotted line circle XIII in FIG. It is a principal part enlarged view in the dashed-dotted line circle XIV in FIG. Similarly, it is a principal part enlarged view in the dashed-dotted line circle XV in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chair 2 Leg 3 Support base 4 Back 5 Seat support 6 Seat support 7 Seat 8 Seat plate 9 Cushion 10 Backrest 11 Operation lever 11a Locking part 12 Base 13 Rail part 14 Rail receiving part 15 Rail base Base 15a Concave 16 Top plate 16a Flat surface 16b Engagement piece 16c Downward piece 16d Opening 16e Engagement part 17 Screw 18 Rib 18a Outer rib 19 Rib 20 Erect L-shaped rib 20a Engagement piece 21 Engagement groove 22 Adjustment rod 23 Operating means 24 Rib 25 Guide part 26 Engagement base part 26a Engagement part 27 Connection part 27a Side plate 28 Slot A
29 Long hole B
30 Axis 31 Biasing means (compression spring)
32 Housing portion 32a Opening 32b Box-shaped body 32c Right side wall 32d Locking protrusion 33 Locking piece 33a Locking protrusion

Claims (5)

By supporting the seat body movably in the front-rear direction with respect to the seat support body, by selectively engaging the engaging portions formed on the seat body with a plurality of engaged portions formed on the seat support body, In a chair that can stop the seat at multiple positions in the front-rear direction,
The seat support body is provided with a pair of left and right rail portions that face in the front-rear direction, and in each of the rail portions, the engagement direction with the engagement portion of the seat body faces the same one of the left and right directions, By providing a plurality of engaged portions, the left and right rail portions are formed on an adjustment rod facing the left-right direction, which is attached to the lower surface of the seat body so as to be movable in the left-right direction. By providing a pair of left and right engaging portions that can be engaged and disengaged to each one of the engaged portions in the seat, the engaging portion is provided on the seat body, and the adjustment rod is moved in the left and right directions, thereby A chair characterized in that a pair of engaging parts and engaged parts can be engaged and disengaged simultaneously.   The chair according to claim 1, wherein an operating lever for engaging and disengaging the engaging portion and the engaged portion is connected to one end portion of the adjusting rod by moving the adjusting rod in the left-right direction.   The chair according to claim 1 or 2, wherein an accommodation portion for accommodating a compression spring as an urging means is provided on the adjustment rod.   The chair according to any one of claims 1 to 3, wherein a guide portion is provided on the lower surface of the seat body so that the adjustment rod can be moved in the left-right direction and cannot be moved in the front-rear direction.   A guide portion that allows the adjustment rod to move in the left-right direction and not to move in the front-rear direction is formed by providing a pair of front and rear ribs in the left-right direction on the lower surface of the seat body, and a rib in the front-rear direction on the lower surface of the seat body The lower end of the rib is supported so as to be slidable on the rail portion, thereby supporting the seat body so as to be movable in the front-rear direction. The lower end of the rib forming the rail receiving portion is located at the same or lower position as the lower end of the rib forming the guide portion at a portion where the rib forming the portion intersects with the rib forming the guide portion. 4. The chair according to 4.

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