JP2009297164A

JP2009297164A - Seat apparatus

Info

Publication number: JP2009297164A
Application number: JP2008153333A
Authority: JP
Inventors: Hiroyuki Suzuki; 宏行鈴木; Naoki Hayashi; 直樹林
Original assignee: Shiroki Corp
Current assignee: Shiroki Corp
Priority date: 2008-06-11
Filing date: 2008-06-11
Publication date: 2009-12-24

Abstract

<P>PROBLEM TO BE SOLVED: To reduce feeling of discomfort of a seated person by reducing a force applied to a rotation regulation (locking) part of reclining when applying an impact force to the back part and, when rattling of the rotation regulation part is transmitted to the back part, sufficiently reducing it. <P>SOLUTION: A seat apparatus includes a base arm 1, a seat support part 23 rotationally supporting a base part 22 at the base arm and supporting a seat base 3 at a part different from the base part 22, a back base 2 having a lock receiving part 24 receiving the rotation regulation to a part different from the base part 22, a seat base 3 rotationally supported at its rear part by the seat support part 23 of the back base 2 and moving operatively connected with the rotation of the back base 2, and a locking mechanism 4 having a locking first member 41 provided at the seat base 3 or the base arm 1 and a locking second member 42 linked with the lock receiving part 24 of the back base 2 and regulating the rotation of the back base 2 by the engagement of both members. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、リクライニング機能を備えたシート装置に関し、例えば、車両用のシートに適用可能なシート装置に関する。 The present invention relates to a seat device having a reclining function, for example, a seat device applicable to a vehicle seat.

車両用シートのリクライニング機構としては、例えば、特開２００７−２３６６６４号公報等に記載された装置を挙げることができる。
ただし、この公報を含む従来の公報に記載の技術は、本願の技術とは、根本的に異なっている。
特開２００７−２３６６６４号公報。 As a reclining mechanism for a vehicle seat, for example, an apparatus described in JP 2007-236664 A can be cited.
However, the technique described in the conventional publication including this publication is fundamentally different from the technique of the present application.
JP 2007-236664 A.

従来のリクライニング機構では、リクライニングの回転中心と、その回転を規制するための部位とが同じであるため、背部に衝撃力が加わると、大きな衝撃力が回転規制部位に加わるという問題があり、強度を確保するために、リクライニング機構の軽量化が困難であるという問題があった。
本発明は、リクライニングをロックして回転を規制する部位を、リクライニング動作における背部の回転中心から離れた部位とすることにより、背部に衝撃力が加わった場合に回転規制部位に加わる力が衝撃力より小さくなるようにすることを目的とする。また、これにより、軽量化を達成することを目的とする。 In the conventional reclining mechanism, since the rotation center of the reclining is the same as the part for regulating the rotation, there is a problem that when the impact force is applied to the back part, a large impact force is applied to the rotation regulating part. Therefore, there is a problem that it is difficult to reduce the weight of the reclining mechanism.
In the present invention, the part that locks the reclining and restricts the rotation is a part away from the center of rotation of the back part in the reclining operation, so that when the impact force is applied to the back part, the force applied to the rotation restricting part is the impact force. The purpose is to make it smaller. Moreover, it aims at achieving weight reduction by this.

また、従来のリクライニング機構では、背部を倒す／起こす動作と、座部を前進／後退させる動作を連動させることができなかった。
本発明は、背部を倒す／起こす動作と、座部を前進／後退させる動作とを、簡単な機構で実現できるようにすることを目的とする。 Further, in the conventional reclining mechanism, the operation of tilting / raising the back portion and the operation of moving the seat forward / backward cannot be linked.
An object of the present invention is to make it possible to realize an operation of tilting / raising a back portion and an operation of moving a seat portion forward / backward with a simple mechanism.

また、従来のリクライニング機構では、リクライニングの回転中心と、その回転を規制するための部位とが同じであるため、回転規制部位の部材間にガタツキがあると、そのガタツキが背部につたわり、着座者に不快感を与えるという問題があった。
本発明は、リクライニングをロックする回転規制部位の複数の部材間のガタツキが、背部に伝わるときに十分に小さくなるようにして、着座者の不快感を十分に軽減することを目的とする。 Further, in the conventional reclining mechanism, the rotation center of the reclining and the part for regulating the rotation are the same, so if there is rattling between the members of the rotation regulating part, the rattling will be attached to the back and seated. There was a problem of discomforting the person.
It is an object of the present invention to sufficiently reduce the discomfort of a seated person so that rattling between a plurality of members of a rotation restricting portion that locks reclining is sufficiently small when transmitted to the back.

本発明を、下記［１］〜［９］に記述する。
なお、この項で用いる符号は理解を容易にするためであり、本発明の構成を符号の構成に限定する趣旨ではない。次項（「発明の効果」の項）についても同様とする。
［１］構成１：
床に取り付けられるベースアーム１と、
前記ベースアーム１の後部により回転可能に基部２２を支持され、前記基部２２と異なる部位に座部ベース３を支持するための座部支持部２３を有し、前記基部２２と異なる部位にロック機構４による回転規制を受けるロック受部２４を有する背部ベース２と、
前記背部ベース２の座部支持部２３により回転可能に後部を支持され、前記背部ベース２の正逆回転に連動して前後移動する座部ベース３と、
前記座部ベース３又は前記ベースアーム１に設けられたロック第１部材４１と、前記背部ベース２のロック受部２４に連繋されるロック第２部材４２とを有し、前記ロック第１部材４１とロック第２部材４２との係合により前記背部ベース２を回転規制するロック機構４と、
を有することを特徴とするシート装置。 The present invention is described in the following [1] to [9].
In addition, the code | symbol used by this term is for understanding easily, and is not the meaning which limits the structure of this invention to the structure of a code | symbol. The same applies to the next item (“Effects of the Invention”).
[1] Configuration 1:
A base arm 1 attached to the floor;
A base portion 22 is rotatably supported by the rear portion of the base arm 1, and has a seat portion support portion 23 for supporting the seat portion base 3 at a portion different from the base portion 22, and a lock mechanism at a portion different from the base portion 22. A back base 2 having a lock receiving portion 24 subject to rotation restriction by 4;
A seat base 3 that is supported by the seat support portion 23 of the back base 2 so that the rear portion is rotatable and moves back and forth in conjunction with forward and reverse rotation of the back base 2;
A lock first member 41 provided on the seat base 3 or the base arm 1, and a lock second member 42 linked to the lock receiving portion 24 of the back base 2. And a lock mechanism 4 for restricting the rotation of the back base 2 by the engagement between the lock second member 42 and
A sheet apparatus comprising:

［２］構成２：
床に取り付けられるベースアーム１と、
前記ベースアーム１の後部により回転可能に基部２２を支持され、前記基部２２より下方の部位に座部ベース３を支持するための座部支持部２３を有し、前記基部２２と異なる部位にロック機構４による回転規制を受けるロック受部２４を有する背部ベース２と、
前記ベースアーム１の前部により回転可能に下端部５１を支持され、上端部５３に座部ベース３との連結部５３０を有するリンク板５と、
前記背部ベース２の座部支持部２３により回転可能に後部を支持されるとともに前記リンク板５の連結部５３０に前部を連結されて回転可能に支持されることにより、前記背部ベース２の正逆回転に連動して前後移動する座部ベース３と、
前記座部ベース３又は前記ベースアーム１に設けられたロック第１部材４１と、前記背部ベース２のロック受部２４に連繋されるロック第２部材４２とを有し、前記ロック第１部材４１とロック第２部材４２との係合により当該係合時の両部材４１，４２の相対的位置関係で決まる角度にて前記背部ベース２を回転規制するロック機構４と、
を有することを特徴とするシート装置。 [2] Configuration 2:
A base arm 1 attached to the floor;
A base portion 22 is rotatably supported by the rear portion of the base arm 1, and has a seat portion support portion 23 for supporting the seat portion base 3 at a portion below the base portion 22, and is locked to a portion different from the base portion 22. A back base 2 having a lock receiving portion 24 subject to rotation restriction by the mechanism 4;
A link plate 5 having a lower end portion 51 supported rotatably by the front portion of the base arm 1 and having a connection portion 530 with the seat base 3 at an upper end portion 53;
The rear part 2 is supported by the seat support part 23 of the back base 2 so as to be rotatable, and the front part is connected to the connection part 530 of the link plate 5 so as to be rotatably supported. A seat base 3 that moves back and forth in conjunction with the reverse rotation;
A lock first member 41 provided on the seat base 3 or the base arm 1, and a lock second member 42 linked to the lock receiving portion 24 of the back base 2. And a lock mechanism 4 for restricting the rotation of the back base 2 at an angle determined by the relative positional relationship between the two members 41 and 42 at the time of the engagement by engagement of the second lock member 42
A sheet apparatus comprising:

［３］構成３：
構成２に於いて、
前記ロック第２部材４２は、前記背部ベース２のロック受部２４により基端部４２２を回転可能に支持され、回転時には前記座部ベース３に設けられたガイド３４により先端部４２３を案内されて変移し、中間部に複数のロック孔４２４，４２４を有するロックプレート４２０であり、
前記ロック第１部材４１は、前記座部ベース３により揺動可能に基端部４１３を支持され、先端部４１４に前記ロックプレート４２０のロック孔４２４，４２４に係合可能なロック突起４１４０を有する揺動部材４１０である、
ことを特徴とするシート装置。 [3] Configuration 3:
In configuration 2,
The lock second member 42 is rotatably supported at the base end portion 422 by the lock receiving portion 24 of the back base 2, and at the time of rotation, the distal end portion 423 is guided by a guide 34 provided on the seat base 3. A lock plate 420 having a plurality of lock holes 424 and 424 in the middle portion,
The lock first member 41 has a base end portion 413 supported by the seat base 3 so as to be swingable, and has a lock protrusion 4140 engageable with the lock holes 424 and 424 of the lock plate 420 at the tip end portion 414. A swing member 410;
The sheet apparatus characterized by the above-mentioned.

［４］構成４：
構成３に於いて、
前記ガイド３４は、当該ガイド３４により先端部４２３を案内されて変移する前記ロックプレート４２０の座部ベースに対する傾斜角度が略一定となるように設定されている、
ことを特徴とするシート装置。 [4] Configuration 4:
In configuration 3,
The guide 34 is set such that an inclination angle of the lock plate 420 that is moved by being guided by the guide 34 with respect to the tip 423 is substantially constant.
The sheet apparatus characterized by the above-mentioned.

［５］構成５：
構成３又は構成４に於いて、
前記ガイド３４は、前記座部ベース３に形成された長孔３４０であり、
前記ロックプレート４２０は、その先端部４２３から突出された突起６４３を前記長孔３４０に挿通されてガイドされる、
ことを特徴とするシート装置。 [5] Configuration 5:
In Configuration 3 or Configuration 4,
The guide 34 is a long hole 340 formed in the seat base 3.
The lock plate 420 is guided by being inserted into the elongated hole 340 through a protrusion 643 protruding from a tip end portion 423 thereof.
The sheet apparatus characterized by the above-mentioned.

［６］構成６：
構成２〜構成５の何れかに於いて、
前記ロック受部２４は、前記座部支持部２３より下方の部位に設けられている、
ことを特徴とするシート装置。 [6] Configuration 6:
In any of Configuration 2 to Configuration 5,
The lock receiving portion 24 is provided at a site below the seat support portion 23.
The sheet apparatus characterized by the above-mentioned.

［７］構成７：
構成２に於いて、
前記ロック第１部材４１は、前記ベースアーム１により回転可能に支持されるとともに回転中心４５０ｃから順に遠ざかるように複数の係合凹部４５４，４５４が並設されたロックレバー４５０であり、
前記ロック第２部材４２は、前記ロックレバー４５０の係合凹部４５４，４５４に係合可能な棒状又は筒状の係合突出部４６４を有するロック連繋部材４６０であり、
前記背部ベース２の正逆回転に伴うロック受部２４の正逆変移により前記ロック連繋部材４６０の係合突出部４６４の係合相手となる前記ロックレバー４５０の係合凹部４５４が決まることにより、前記背部ベース２の回転規制時の角度が決まる、
ことを特徴とするシート装置。 [7] Configuration 7:
In configuration 2,
The lock first member 41 is a lock lever 450 that is rotatably supported by the base arm 1 and has a plurality of engaging recesses 454 and 454 arranged in parallel so as to move away from the rotation center 450c in order.
The lock second member 42 is a lock connecting member 460 having a rod-like or cylindrical engagement protrusion 464 that can be engaged with the engagement recesses 454 and 454 of the lock lever 450.
By determining the engagement recess 454 of the lock lever 450 to be engaged with the engagement protrusion 464 of the lock connecting member 460 by the forward / reverse shift of the lock receiving portion 24 accompanying the forward / reverse rotation of the back base 2, An angle at the time of restricting rotation of the back base 2 is determined.
The sheet apparatus characterized by the above-mentioned.

［８］構成８：
構成７に於いて、
前記ベースアーム１は、前記背部ベース２の正逆回転に伴うロック受部２４の正逆変移により前記ロック連繋部材４６０の係合突出部４６４が描く移動軌跡に沿う長孔１６４を有し、
前記ロック連繋部材４６０の係合突出部４６４は、前記長孔１６４を貫通して前記ロックレバー４５０の係合凹部４５４，４５４に係合し、前記長孔１６４の長手方向両端の縁部１６４ａ，１６４ｂにより移動範囲を規制される、
ことを特徴とするシート装置。 [8] Configuration 8:
In configuration 7,
The base arm 1 has a long hole 164 that follows a movement locus drawn by the engagement protrusion 464 of the lock connecting member 460 due to forward / reverse displacement of the lock receiving portion 24 accompanying forward / reverse rotation of the back base 2,
Engagement protrusions 464 of the lock linking member 460 pass through the long hole 164 and engage with engagement recesses 454 and 454 of the lock lever 450, and edges 164 a, The movement range is restricted by 164b.
The sheet apparatus characterized by the above-mentioned.

［９］構成９：
構成７に於いて、
前記座部ベース３は、その後部に設けられた孔３２に、前記背部ベース２の座部支持部２３から突出された棒状又は筒状の支持突出部４６３を挿通されることにより、前記背部ベース２により回転可能に支持され、
前記背部ベース２は、前記基部２２とは異なる部位にロック受部２４として設けられたロック受孔２４０に、前記ロック連繋部材から当該背部ベース２の方向へ突出された棒状又は筒状の連繋突出部４６３を挿通されることにより、前記ロック連繋部材４６０と連繋され、
前記背部ベース２の座部支持部２３と前記ロック受部２４として設けられたロック受孔２４０とが兼用されるとともに、前記ロック連繋部材４６０の連繋突出部４６３が前記背部ベース２の座部支持部２３から突出される支持突出部４６３として兼用される、
ことを特徴とするシート装置。 [9] Configuration 9:
In configuration 7,
The seat base 3 is inserted into a hole 32 provided in the rear portion thereof through a rod-like or cylindrical support projection 463 projecting from the seat support portion 23 of the back base 2, whereby the back base 2 is rotatably supported by
The back base 2 is connected to a lock receiving hole 240 provided as a lock receiving portion 24 at a site different from the base 22 and is connected to a rod-like or cylindrical connection protruding from the lock connecting member toward the back base 2. By being inserted through the portion 463, it is linked to the lock linkage member 460,
The seat base support portion 23 of the back base 2 and the lock receiving hole 240 provided as the lock receiving portion 24 are used together, and the connecting protrusion 463 of the lock connecting member 460 supports the seat portion of the back base 2. Also used as a support protrusion 463 that protrudes from the portion 23,
The sheet apparatus characterized by the above-mentioned.

構成１は、床に取り付けられるベースアーム１と、前記ベースアーム１の後部により回転可能に基部２２を支持され、前記基部２２と異なる部位に座部ベース３を支持するための座部支持部２３を有し、前記基部２２と異なる部位にロック機構４による回転規制を受けるロック受部２４を有する背部ベース２と、前記背部ベース２の座部支持部２３により回転可能に後部を支持され、前記背部ベース２の正逆回転に連動して前後移動する座部ベース３と、前記座部ベース３又は前記ベースアーム１に設けられたロック第１部材４１と、前記背部ベース２のロック受部２４に連繋されるロック第２部材４２とを有し、前記ロック第１部材４１とロック第２部材４２との係合により前記背部ベース２を回転規制するロック機構４とを有することを特徴とするシート装置であるため、背部に衝撃力が加わった場合にロック受部２４に加わる力は、ロック受部が基部２２と同部位に設けられている場合より小さくなる。また、ロック第１部材４１とロック第２部材４２の係合にガタツキがある場合でも、そのガタツキは、基部２２とは異部位のロック受部２４を介して背部に伝わるため、背部でのガタツキは小さくなり、着座者の不快感も軽減される。また、背部ベース２の正逆回転に連動して座部ベース３が前後移動するため、背部の倒し／起しのリクライニング動作に、座部の前後移動を連動させることができる。 In the configuration 1, a base arm 1 attached to a floor and a base portion 22 supported by a rear portion of the base arm 1 so as to be rotatable, and a seat portion support portion 23 for supporting a seat base 3 at a portion different from the base portion 22. A back base 2 having a lock receiving portion 24 subjected to rotation regulation by the lock mechanism 4 at a portion different from the base portion 22, and a rear portion rotatably supported by a seat support portion 23 of the back base 2, A seat base 3 that moves back and forth in conjunction with forward / reverse rotation of the back base 2, a lock first member 41 provided on the seat base 3 or the base arm 1, and a lock receiving portion 24 of the back base 2. And a lock mechanism 4 for restricting the rotation of the back base 2 by the engagement of the lock first member 41 and the lock second member 42. Because a seat device for a symptom, the force applied to the lock receiving portion 24 when an impact force is applied to the back is smaller than when the lock receiving portion are provided on the same site as the base 22. Further, even if there is a backlash in the engagement between the lock first member 41 and the lock second member 42, the backlash is transmitted to the back through the lock receiving portion 24, which is different from the base 22. Is reduced, and the discomfort of the seated person is reduced. Further, since the seat base 3 moves back and forth in conjunction with forward and reverse rotation of the back base 2, the back and forth movement of the seat can be linked to the reclining operation of the back tilting / raising.

構成２は、床に取り付けられるベースアーム１と、前記ベースアーム１の後部により回転可能に基部２２を支持され、前記基部２２より下方の部位に座部ベース３を支持するための座部支持部２３を有し、前記基部２２と異なる部位にロック機構４による回転規制を受けるロック受部２４を有する背部ベース２と、前記ベースアーム１の前部により回転可能に下端部５１を支持され、上端部５３に座部ベース３との連結部５３０を有するリンク板５と、前記背部ベース２の座部支持部２３により回転可能に後部を支持されるとともに前記リンク板５の連結部５３０に前部を連結されて回転可能に支持されることにより、前記背部ベース２の正逆回転に連動して前後移動する座部ベース３と、前記座部ベース３又は前記ベースアーム１に設けられたロック第１部材４１と、前記背部ベース２のロック受部２４に連繋されるロック第２部材４２とを有し、前記ロック第１部材４１とロック第２部材４２との係合により当該係合時の両部材４１，４２の相対的位置関係で決まる角度にて前記背部ベース２を回転規制するロック機構４とを有することを特徴とするシート装置であるため、背部に衝撃力が加わった場合にロック受部２４に加わる力は、ロック受部が基部２２と同部位に設けられている場合より小さくなる。また、ロック第１部材４１とロック第２部材４２の係合にガタツキがある場合でも、そのガタツキは、基部２２とは異部位のロック受部２４を介して背部に伝わるため、背部でのガタツキは小さくなり、着座者の不快感も軽減される。また、背部ベースを支持する基部２２より下方に座部ベースを支持する座部支持部が設けられており、且つ、背部ベース２の正逆回転に連動して座部ベース３が前後移動するため、背部を倒すときに座部が前進し、起こすときに後退する動作を実現できる。 Configuration 2 includes a base arm 1 attached to the floor and a base 22 rotatably supported by a rear portion of the base arm 1, and a seat support portion for supporting the seat base 3 at a position below the base 22. 23, a back base 2 having a lock receiving portion 24 that receives rotation restriction by the lock mechanism 4 at a portion different from the base portion 22, and a lower end portion 51 supported rotatably by the front portion of the base arm 1. A link plate 5 having a connection portion 530 with the seat base 3 at the portion 53 and a rear portion rotatably supported by the seat support portion 23 of the back base 2 and a front portion at the connection portion 530 of the link plate 5 Are coupled to and supported by the seat base 3 that moves back and forth in conjunction with forward and reverse rotation of the back base 2 and the seat base 3 or the base arm 1. The lock first member 41 and the lock second member 42 connected to the lock receiving portion 24 of the back base 2 are engaged by the engagement of the lock first member 41 and the lock second member 42. Since the seat device has the lock mechanism 4 that restricts the rotation of the back base 2 at an angle determined by the relative positional relationship between the two members 41 and 42 at the time, an impact force is applied to the back portion. In this case, the force applied to the lock receiving portion 24 is smaller than when the lock receiving portion is provided at the same site as the base portion 22. Further, even if there is a backlash in the engagement between the lock first member 41 and the lock second member 42, the backlash is transmitted to the back through the lock receiving portion 24, which is different from the base 22. Is reduced, and the discomfort of the seated person is reduced. In addition, a seat support portion that supports the seat base is provided below the base portion 22 that supports the back base, and the seat base 3 moves back and forth in conjunction with forward and reverse rotation of the back base 2. It is possible to realize an operation in which the seat part moves forward when the back part is tilted and retracts when it is raised.

構成３は、構成２に於いて、前記ロック第２部材４２は、前記背部ベース２のロック受部２４により基端部４２２を回転可能に支持され、回転時には前記座部ベース３に設けられたガイド３４により先端部４２３を案内されて変移し、中間部に複数のロック孔４２４，４２４を有するロックプレート４２０であり、前記ロック第１部材４１は、前記座部ベース３により揺動可能に基端部４１３を支持され、先端部４１４に前記ロックプレート４２０のロック孔４２４，４２４に係合可能なロック突起４１４０を有する揺動部材４１０であることを特徴とするシート装置であるため、ロックは背部ベース２と座部ベース３の間で行われる。このため、強度が要求されるベースアーム１にロック機構を構成するための長孔等を形成する必要が無く、強度を確保しやすい。 In the configuration 3, in the configuration 2, the lock second member 42 is supported by the lock receiving portion 24 of the back base 2 so that the base end portion 422 can rotate, and is provided on the seat base 3 at the time of rotation. A lock plate 420 having a plurality of lock holes 424 and 424 in the middle portion is guided and shifted by the guide 34 and the lock first member 41 is swingable by the seat base 3. Since the seat device is characterized in that it is a swinging member 410 that is supported by the end portion 413 and has a lock projection 4140 that can be engaged with the lock holes 424 and 424 of the lock plate 420 at the tip end portion 414, the lock is This is performed between the back base 2 and the seat base 3. For this reason, it is not necessary to form a long hole or the like for configuring the lock mechanism in the base arm 1 that requires strength, and it is easy to ensure the strength.

構成４は、構成３に於いて、前記ガイド３４は、当該ガイド３４により先端部４２３を案内されて変移する前記ロックプレート４２０の座部ベースに対する傾斜角度が略一定となるように設定されていることを特徴とするシート装置であるため、ロックプレート４２０の変移位置にかかわらず、ロック突起４１４０が係合するべきロック孔４２４の両側（前側，後側）の縁面の方向（例：垂直方向）を不変とすることができる。言い換えれば、ロック突起４１４０が、複数のロック孔４２４，４２４の中の何れに係合するかにかかわらず、当該係合するロック孔４２４の両側の縁面を、一定方向（例：垂直方向）に向けることができる。このため、ロック突起４１４０とロック孔４２４の両側の縁面との係合時のガタツキを最小にでき、背部ベース２側へ伝わるガタツキを最小にできる。 In the configuration 4, in the configuration 3, the guide 34 is set so that an inclination angle with respect to the seat base of the lock plate 420 to which the distal end portion 423 is guided by the guide 34 and changed is substantially constant. Therefore, regardless of the shift position of the lock plate 420, the direction of the edge surfaces (for example, vertical direction) on both sides (front side and rear side) of the lock hole 424 with which the lock protrusion 4140 should be engaged. ) Can be immutable. In other words, regardless of which of the plurality of lock holes 424 and 424 is engaged with the lock protrusion 4140, the edge surfaces on both sides of the lock hole 424 to be engaged are set in a certain direction (eg, vertical direction). Can be directed to. For this reason, the backlash at the time of engagement with the lock protrusion 4140 and the edge surface of both sides of the lock hole 424 can be minimized, and the backlash transmitted to the back base 2 side can be minimized.

構成５は、構成３又は構成４に於いて、前記ガイド３４は、前記座部ベース３に形成された長孔３４０であり、前記ロックプレート４２０は、その先端部４２３から突出された突起４２３０を前記長孔３４０に挿通されてガイドされることを特徴とするシート装置であるため、別体のガイド部材を設けることなくロックプレート４２０の先端部４２３の案内を実現でき、軽量化に寄与できる。 Configuration 5 is Configuration 3 or Configuration 4, in which the guide 34 is a long hole 340 formed in the seat base 3, and the lock plate 420 has a protrusion 4230 protruding from its tip 423. Since the seat device is guided by being inserted through the long hole 340, the guide of the distal end portion 423 of the lock plate 420 can be realized without providing a separate guide member, which can contribute to weight reduction.

構成６は、構成２〜構成５の何れかに於いて、前記ロック受部２４は、前記座部支持部２３より下方の部位に設けられていることを特徴とするシート装置であるため、ロック第２部材４２の変移量を、座部ベース２の変移量よりも小さくでき、座部ベース２に設けられるガイド３４（長孔３４０）やロック第２部材４２（ロックプレート４２０）を、小型化・軽量化できる。また、基部２２とロック受部２４の距離を十分に大きくとることができるため、背部に衝撃力が加わった場合にロック受部２４に加わる力を、十分に小さくできる。また、ロック第１部材４１とロック第２部材４２との係合にガタツキがある場合でも、そのガタツキを十分に小さくでき、着座者の不快感を十分に軽減できる。 Configuration 6 is the seat device according to any one of Configurations 2 to 5, wherein the lock receiving portion 24 is provided at a position below the seat support portion 23. The amount of change of the second member 42 can be made smaller than the amount of change of the seat base 2, and the guide 34 (long hole 340) and the lock second member 42 (lock plate 420) provided in the seat base 2 are downsized.・ Weight can be reduced. Further, since the distance between the base portion 22 and the lock receiving portion 24 can be made sufficiently large, the force applied to the lock receiving portion 24 when an impact force is applied to the back portion can be sufficiently reduced. Further, even when there is a backlash in the engagement between the lock first member 41 and the lock second member 42, the backlash can be sufficiently reduced, and the discomfort of the seated person can be sufficiently reduced.

構成７は、構成２に於いて、前記ロック第１部材４１は、前記ベースアーム１により回転可能に支持されるとともに回転中心４５０ｃから順に遠ざかるように複数の係合凹部４５４，４５４が並設されたロックレバー４５０であり、前記ロック第２部材４２は、前記ロックレバー４５０の係合凹部４５４，４５４に係合可能な棒状又は筒状の係合突出部４６４を有するロック連繋部材４６０であり、前記背部ベース２の正逆回転に伴うロック受部２４の正逆変移により前記ロック連繋部材４６０の係合突出部４６４の係合相手となる前記ロックレバー４５０の係合凹部４５４が決まることにより、前記背部ベース２の回転規制時の角度が決まることを特徴とするシート装置であるため、ロックは、床に取り付けられるベースアーム１と背部ベース２との間で行われる。このため、背部のガタツキを十分に抑制でき、着座者の不快感を十分に軽減できる。 In Configuration 7, in Configuration 2, the lock first member 41 is rotatably supported by the base arm 1, and a plurality of engaging recesses 454 and 454 are arranged in parallel so as to be sequentially away from the rotation center 450c. The lock second member 42 is a lock linking member 460 having a rod-like or cylindrical engagement protrusion 464 that can be engaged with the engagement recesses 454 and 454 of the lock lever 450, By determining the engagement recess 454 of the lock lever 450 to be engaged with the engagement protrusion 464 of the lock connecting member 460 by the forward / reverse shift of the lock receiving portion 24 accompanying the forward / reverse rotation of the back base 2, Since the angle at the time of restricting the rotation of the back base 2 is determined, the lock includes a base arm 1 attached to the floor and a back base. It carried out between vinegar 2. For this reason, the backlash of a back part can fully be suppressed and a seated person's discomfort can fully be reduced.

構成８は、構成７に於いて、前記ベースアーム１は、前記背部ベース２の正逆回転に伴うロック受部２４の正逆変移により前記ロック連繋部材４６０の係合突出部４６４が描く移動軌跡に沿う長孔１６４を有し、前記ロック連繋部材４６０の係合突出部４６４は、前記長孔１６４を貫通して前記ロックレバー４５０の係合凹部４５４，４５４に係合し、前記長孔１６４の長手方向両端の縁部１６４ａ，１６４ｂにより移動範囲を規制されることを特徴とするシート装置であるため、係合凹部の間隔（ピッチ）を背部ベース２の傾角に合わせることができ、設定が容易である。 Configuration 8 is the configuration 7 according to Configuration 7, wherein the base arm 1 is moved by the engagement projecting portion 464 of the lock connecting member 460 due to forward / reverse displacement of the lock receiving portion 24 accompanying forward / reverse rotation of the back base 2. The engagement protrusion 464 of the lock connecting member 460 passes through the long hole 164 and engages with the engagement recesses 454 and 454 of the lock lever 450, and the long hole 164. Since the movement range is regulated by the edges 164a and 164b at both ends in the longitudinal direction, the interval (pitch) of the engagement recesses can be adjusted to the inclination angle of the back base 2, and the setting can be made. Easy.

構成９は、構成７に於いて、前記座部ベース３は、その後部に設けられた孔３２に、前記背部ベース２の座部支持部２３から突出された棒状又は筒状の支持突出部４６３を挿通されることにより、前記背部ベース２により回転可能に支持され、前記背部ベース２は、前記基部２２とは異なる部位にロック受部２４として設けられたロック受孔２４０に、前記ロック連繋部材から当該背部ベース２の方向へ突出された棒状又は筒状の連繋突出部４６３を挿通されることにより、前記ロック連繋部材４６０と連繋され、前記背部ベース２の座部支持部２３と前記ロック受部２４として設けられたロック受孔２４０とが兼用されるとともに、前記ロック連繋部材４６０の連繋突出部４６３が前記背部ベース２の座部支持部２３から突出される支持突出部４６３として兼用されることを特徴とするシート装置であるため、部品点数を削減でき、コスト低減や軽量化を達成できる。 Configuration 9 is that in Configuration 7, the seat base 3 has a rod-like or cylindrical support projection 463 projecting from the seat support 23 of the back base 2 in a hole 32 provided in the rear portion thereof. The back base 2 is rotatably supported by the back base 2, and the back base 2 is connected to the lock connecting member 240 in a lock receiving hole 240 provided as a lock receiving portion 24 at a site different from the base 22. Is inserted into a rod-like or cylindrical connecting protrusion 463 protruding in the direction of the back base 2 to be connected to the lock connecting member 460, and the seat support 23 and the lock receiver of the back base 2 A support projection in which the lock receiving hole 240 provided as the portion 24 is also used, and the connecting protrusion 463 of the lock connecting member 460 protrudes from the seat support portion 23 of the back base 2. Since a sheet apparatus characterized by being also used as a part 463, the number of parts can be reduced, thereby achieving cost reduction and weight reduction.

以下、図面を参照して本発明の実施の形態を説明する。
［１］第１の実施の形態
図１は第１の実施の形態のシート装置の概要を模式的に示す斜視図、図２は主要な部材を分解して示す説明図である。また、図３は主要な部材を組み付けた状態を示す透視図であり、（ａ）は起こした状態、（ｂ）は若干倒した状態を、それぞれ示す。 Embodiments of the present invention will be described below with reference to the drawings.
[1] First Embodiment FIG. 1 is a perspective view schematically showing an outline of a seat device according to a first embodiment, and FIG. 2 is an explanatory view showing the main members in an exploded manner. FIGS. 3A and 3B are perspective views showing a state where main members are assembled. FIG. 3A shows a raised state, and FIG. 3B shows a slightly tilted state.

第１の実施の形態は、構成１〜６に対応する。
図示のシート装置は、ベースアーム１と、背部ベース２と、座部ベース３と、ロック機構４（ロック第１部材４１（揺動部材４１０，カバー４１２，受孔３４４等），ロック第２部材４２（ロックプレート４２０））と、リンク板５を有する。 The first embodiment corresponds to configurations 1 to 6.
The illustrated seat device includes a base arm 1, a back base 2, a seat base 3, a lock mechanism 4 (a lock first member 41 (a swing member 410, a cover 412, a receiving hole 344, etc.), a lock second member. 42 (lock plate 420)) and the link plate 5.

ベースアーム１は、床（不図示）に取り付けられる。
背部ベース２は、ピン６１２を背部ベース２の基部２２の孔２２０に挿通した後、さらに、ベースアーム１の後部の孔１０２に挿通することにより、ピン６１２を回転の支軸として、ベースアーム１により回転可能に支持される。 The base arm 1 is attached to a floor (not shown).
After the pin 612 is inserted into the hole 220 in the base portion 22 of the back base 2 and further inserted into the hole 102 in the rear portion of the base arm 1, the back base 2 is inserted into the base arm 1 using the pin 612 as a rotation support shaft. Is supported rotatably.

座部ベース３の後部は、ピン６２３を座部ベース３の後部の孔３２に挿通した後、さらに、背部ベース２の座部支持部２３の孔２３０に挿通することにより、ピン６２３を回転の支軸として、背部ベース２により回転可能に支持される。なお、座部支持部２３は基部２２よりも下方であるため、床に対する位置が不変の基部２２の孔２２０に挿通したピン６１２を支軸として背部を後方へ倒すと、後述のように座部ベース３の前部がリンク５を介してベースアーム１に支持されているため、座部ベース３は前方へ移動する。 The rear part of the seat base 3 is inserted into the hole 230 of the seat support part 23 of the back base 2 after the pin 623 is inserted into the hole 32 in the rear part of the seat base 3, thereby rotating the pin 623. As a support shaft, the back base 2 is rotatably supported. Since the seat support portion 23 is located below the base portion 22, when the back portion is tilted backward with the pin 612 inserted into the hole 220 of the base portion 22 in which the position relative to the floor is unchanged, the seat portion will be described later. Since the front portion of the base 3 is supported by the base arm 1 via the link 5, the seat base 3 moves forward.

座部ベース３の前部は、リンク板５を介して、ベースアーム１に支持される。
即ち、リンク板５の上部５３の孔５３０に挿通したピン６５３を、座部ベース３の前部の孔３３に挿通することにより、座部ベース３の前部がリンク板５に連結される。このリンク板５の下部５１の孔５１０に、ピン６５１を挿通し、さらに、ベースアーム１の前部の孔１０３に挿通する。これにより、座部ベース３の前部は、リンク板５を介して、ベースアーム１に支持される。
このように前部を支持されているため、前述のように、背部２を後方へ倒すと、座部ベース３は前方へ移動することとなる。なお、リンク板５を用いる機構に代えて、例えばレール等を用いた摺動機構を採用するようにしてもよい。 The front portion of the seat base 3 is supported by the base arm 1 via the link plate 5.
That is, the front portion of the seat base 3 is connected to the link plate 5 by inserting the pin 653 inserted into the hole 530 of the upper portion 53 of the link plate 5 into the hole 33 of the front portion of the seat base 3. The pin 651 is inserted into the hole 510 in the lower portion 51 of the link plate 5 and further inserted into the hole 103 in the front portion of the base arm 1. Thereby, the front portion of the seat base 3 is supported by the base arm 1 via the link plate 5.
Since the front part is supported in this way, as described above, when the back part 2 is tilted backward, the seat base 3 moves forward. In place of the mechanism using the link plate 5, for example, a sliding mechanism using a rail or the like may be adopted.

ロック機構は、ロック第１部材４１とロック第２部材４２を有する。
ロック第１部材４１は、揺動部材４１０、カバー４１２、ロック受孔３４４、解除レバー４１９、スプリング（不図示）等で構成される。
カバー４１２は、座部ベース３の側面（一点鎖線枠で示す部位）に取り付けられる。
揺動部材４１０は、カバー４１２を覆うようにして、ピン６４１０等を用いて、カバー４１２の上部に揺動可能に取り付けられる。この揺動部材４１０には、不図示のスプリングにより、常時、先端部（下端部）４１４側をカバー４１２側へ押しつける付勢力が与えられている。このため、揺動部材４１０の先端部４１４から奥側へ折り返して形成された係合爪４１４０は、カバー４１２の挿通孔４１２４、さらに、ロックプレート４２０（後述）の係合孔４２４を貫通して、座部ベース３のロック受孔３４４に挿通され、これにより、ロック状態となる。
このロック状態に於いて、スプリング（不図示）の付勢力に抗して、揺動部材４１０の先端部（下端部）４１４側をカバー４１２から離す方向（手前側）へ変移させると、係合爪４１４０が、ロック受孔３４４、係合孔４２４、挿通孔４１２４から離脱して、ロックが解除される。このロック解除操作は、例えば、解除レバー４１９により、揺動部材４１０の舌部４１１を上方へ持ち上げる等して実現することができる。 The lock mechanism includes a lock first member 41 and a lock second member 42.
The lock first member 41 includes a swing member 410, a cover 412, a lock receiving hole 344, a release lever 419, a spring (not shown), and the like.
The cover 412 is attached to the side surface of the seat base 3 (part indicated by a one-dot chain line frame).
The swing member 410 is attached to the upper portion of the cover 412 so as to be swingable by using a pin 6410 or the like so as to cover the cover 412. The swinging member 410 is constantly applied with a biasing force that presses the tip end (lower end) 414 side toward the cover 412 side by a spring (not shown). For this reason, the engaging claw 4140 formed by folding back from the distal end portion 414 of the swinging member 410 penetrates the insertion hole 4124 of the cover 412 and the engagement hole 424 of the lock plate 420 (described later). Then, it is inserted through the lock receiving hole 344 of the seat base 3, thereby entering a locked state.
In this locked state, when the tip (lower end) 414 side of the swinging member 410 is moved away from the cover 412 (front side) against the urging force of a spring (not shown), the engagement is achieved. The claw 4140 is detached from the lock receiving hole 344, the engagement hole 424, and the insertion hole 4124, and the lock is released. This unlocking operation can be realized, for example, by lifting the tongue 411 of the swinging member 410 upward by the release lever 419.

ロック第２部材４２は、ロックプレート４２０で構成される。
ロックプレート４２０の後部は、ピン６４２をロックプレート４２０の後部の孔４２２に挿通し、さらに、背部ベース２のロック受部２４の孔２４０に挿通することにより、ピン６４２を回転の支軸として、背部ベース２により回転可能に支持されている。なお、ロック受部２４は、基部２２よりも下方であり、且つ、座部支持部２３よりも下方であるため、床に対する位置が不変の基部２２の孔２２０に挿通したピン６１２を支軸として背部を後方へ倒すと、後述のようにロックプレート４２０の前部が座部ベース３のガイド長孔３４０により摺動可能に支持されているため、ロックプレート４２０は前方へ移動するとともに、その移動量は、座部ベース３の移動量よりも小さくなる。 The lock second member 42 includes a lock plate 420.
The rear portion of the lock plate 420 is inserted into the hole 422 in the rear portion of the lock plate 420 and further into the hole 240 in the lock receiving portion 24 of the back base 2, thereby using the pin 642 as a rotation support shaft. The back base 2 is rotatably supported. Since the lock receiving portion 24 is below the base portion 22 and below the seat support portion 23, the pin 612 inserted through the hole 220 of the base portion 22 whose position relative to the floor is unchanged is used as a support shaft. When the back part is tilted backward, the front part of the lock plate 420 is slidably supported by the guide slot 340 of the seat base 3 as will be described later. The amount is smaller than the moving amount of the seat base 3.

ロックプレート４２０の前部は、ピン６４３を孔４２３に挿通し、さらに、ガイド長孔３４０に挿通することにより、ガイド長孔３４０に沿ってガイド長孔３４０内を摺動可能なようにして、座部ベース３により支持されている。
このように前部を支持されているため、前述のように、背部２を後方へ倒すと、ロックプレート４２０は前方へ移動することとなる。
なお、ロックプレート４２０は、その中間部（係合孔４２４，４２４，が形成されている部分）が、前述のカバー４１２と座部ベース３の側面との間隙に挿通されるようにして設けられる。 The front portion of the lock plate 420 is slidable in the guide long hole 340 along the guide long hole 340 by inserting the pin 643 into the hole 423 and further through the guide long hole 340. It is supported by the seat base 3.
Since the front part is supported in this way, as described above, when the back part 2 is tilted backward, the lock plate 420 moves forward.
The lock plate 420 is provided such that an intermediate portion thereof (a portion where the engagement holes 424 and 424 are formed) is inserted into the gap between the cover 412 and the side surface of the seat base 3. .

このロックプレート４２０は、係合孔４２４，４２４，の前後の内壁面が常に略鉛直方向を向くように、設定されている。換言すれば、前述した前後移動時に於いて、ロックプレート４２０の傾斜角（座部ベース３に対する傾斜角）が変動しないように、設定されている。このため、ロック時には、揺動部材の係合爪４１４０の前後の外壁面全域が、係合孔４２４の前後の内壁面全域に当接することとなり、良好なロック強度を得られる。
このような設定は、ロックプレート４２０の取付位置、さらには、ガイド長孔３４０の形成部位や形状を工夫することにより実現することができる。 The lock plate 420 is set so that the inner wall surfaces before and after the engagement holes 424, 424 are always in the substantially vertical direction. In other words, the tilt angle of the lock plate 420 (the tilt angle with respect to the seat base 3) is set so as not to change during the above-described back-and-forth movement. For this reason, at the time of locking, the entire outer wall surface before and after the engaging claw 4140 of the swinging member comes into contact with the entire inner wall surface before and after the engaging hole 424, and good locking strength can be obtained.
Such a setting can be realized by devising the mounting position of the lock plate 420 and further, the formation site and shape of the guide long hole 340.

第１の実施の形態のシート装置は以上のような構成であるため、背部に衝撃力が加わった場合にロック受部２４に加わる力が小さくなる。また、ロック第１部材４１とロックプレート４２０の係合にガタツキがある場合でも、そのガタツキは、基部２２より十分に下方部位のロック受部２４を介して背部に伝わるため、背部でのガタツキは小さくなり、着座者の不快感も軽減される。また、背部ベース２を支持する基部２２より下方に座部ベース３を支持する座部支持部２３が設けられており、且つ、背部ベース２の正逆回転に連動して座部ベース３が前後移動するため、背部を倒すときに座部が前進し、起こすときに後退する動作を実現できる。
また、ロックは背部ベース２と座部ベース３の間で行われる。このため、強度が要求されるベースアーム１にロック機構を構成するための長孔等を形成する必要が無く、強度を確保しやすい。
また、ロックプレート４２０の変移量を座部ベース２の変移量よりも小さくでき、座部ベース３に設けられるガイド長孔３４０やロックプレート４２０を、小型化・軽量化できる。また、基部２２とロック受部２４の距離を十分に大きくとることができるため、背部に衝撃力が加わった場合にロック受部２４に加わる力を、十分に小さくできる。また、ロック第１部材４１とロックプレート４２０との係合にガタツキがある場合でも、そのガタツキを十分に小さくでき、着座者の不快感を十分に軽減できる。 Since the seat device according to the first embodiment is configured as described above, the force applied to the lock receiving portion 24 is reduced when an impact force is applied to the back portion. Further, even when there is a backlash in the engagement between the lock first member 41 and the lock plate 420, the backlash is transmitted to the back part through the lock receiving part 24 at a position sufficiently lower than the base part 22, so that the backlash is not It becomes smaller and the discomfort of the seated person is also reduced. Further, a seat support portion 23 that supports the seat base 3 is provided below the base portion 22 that supports the back base 2, and the seat base 3 is moved back and forth in conjunction with forward and reverse rotation of the back base 2. Since it moves, the operation of moving the seat forward when tilting the back and moving backward when raising the back can be realized.
Locking is performed between the back base 2 and the seat base 3. For this reason, it is not necessary to form a long hole or the like for configuring the lock mechanism in the base arm 1 that requires strength, and it is easy to ensure the strength.
Further, the shift amount of the lock plate 420 can be made smaller than the shift amount of the seat base 2, and the guide long hole 340 and the lock plate 420 provided in the seat base 3 can be reduced in size and weight. Further, since the distance between the base portion 22 and the lock receiving portion 24 can be made sufficiently large, the force applied to the lock receiving portion 24 when an impact force is applied to the back portion can be sufficiently reduced. Further, even if there is a backlash in the engagement between the lock first member 41 and the lock plate 420, the backlash can be sufficiently reduced, and the discomfort of the seated person can be sufficiently reduced.

［２］第２の実施の形態
図４は第２の実施の形態のシート装置の概要を模式的に示す斜視図、図５は主要な部材を分解して示す説明図である。 [2] Second Embodiment FIG. 4 is a perspective view schematically showing an outline of a seat device according to a second embodiment, and FIG. 5 is an explanatory view showing the main members in an exploded manner.

第２の実施の形態は、構成１〜２、７〜９に対応する。
図示のシート装置は、ベースアーム１と、背部ベース２と、座部ベース３と、ロック機構４（ロック第１部材４１（ロックレバー４５０等），ロック第２部材４２（ロック連繋部材４６０，長孔１６４））と、リンク板５を有する。
以下、第１の実施の形態と異なる点を中心に説明する。 The second embodiment corresponds to configurations 1-2 and 7-9.
The illustrated seat device includes a base arm 1, a back base 2, a seat base 3, a lock mechanism 4 (lock first member 41 (lock lever 450 etc.), lock second member 42 (lock link member 460, long Hole 164)) and link plate 5.
The following description will focus on differences from the first embodiment.

第１の実施の形態では、背部ベース２と座部ベース３を、ロック機構４（ロック第１部材４１，ロック第２部材４２）でロックしていたのに対して、第２の実施の形態では、背部ベース２とベースアーム１とを、ロック機構４（ロック第１部材４１，ロック第２部材４２）でロックする。 In the first embodiment, the back base 2 and the seat base 3 are locked by the lock mechanism 4 (the lock first member 41 and the lock second member 42), whereas the second embodiment. Then, the back part base 2 and the base arm 1 are locked by the lock mechanism 4 (the lock | rock 1st member 41 and the lock | rock 2nd member 42).

即ち、ロック連繋部材（ピン）４６０の奥側突出部４６３を、背部２のロック受部２４に設けられている孔２４０に挿通するとともに、手前側突出部４６４をベースアーム１の長孔１６４に挿通し、さらに、この手前側突出部１６４を、ロックレバー４５０の係合凹部４５４に係合する。これにより、背部ベース２とベースアーム１とがロックされる。
ここで、ロックレバー４５０は、ピン６４８を用いてベースアーム１により回転可能に支持されており、このロックレバー４５０には、スプリング（不図示）により、常に、係合凹部４５４を連繋部材（ピン）４６０の手前側突出部４６４の方向への付勢する力が与えられている。 In other words, the rear side protruding portion 463 of the lock connecting member (pin) 460 is inserted into the hole 240 provided in the lock receiving portion 24 of the back portion 2, and the front side protruding portion 464 is inserted into the long hole 164 of the base arm 1. Further, the front side protruding portion 164 is engaged with the engaging concave portion 454 of the lock lever 450. Thereby, the back part base 2 and the base arm 1 are locked.
Here, the lock lever 450 is rotatably supported by the base arm 1 using a pin 648, and the engagement recess 454 is always connected to the lock lever 450 by a spring (not shown). ) A biasing force in the direction of the front side protrusion 464 of 460 is applied.

図示の例では、ロック連繋部材（ピン）４６０は２本用いられている。手前側のロック連繋部材（ピン）４６０の奥側突出部４６３は、奥側のロック連繋部材（ピン）４６０の奥側突出部４６３よりも長く形成されている。この長く形成されている奥側突出部４６３は、背部ベース２の孔２４０を挿通した後、さらに、座部ベース３の後部の孔３２に挿通されている。つまり、座部ベース３の後部を、背部ベース２により回転可能に支持するための部材として兼用されている。 In the illustrated example, two lock connecting members (pins) 460 are used. The rear side protruding portion 463 of the lock connecting member (pin) 460 on the near side is formed longer than the rear side protruding portion 463 of the lock connecting member (pin) 460 on the back side. The long rear projection 463 is inserted through the hole 240 in the back base 2 and then into the hole 32 in the rear part of the seat base 3. That is, the rear portion of the seat base 3 is also used as a member for rotatably supporting the back portion base 2.

以上のように構成されている第２の実施の形態のシート装置では、ロックが、床に取り付けられるベースアーム１と背部ベース２との間で行われため、背部のガタツキを十分に抑制でき、着座者の不快感を十分に軽減できる。
また、係合凹部４５４，４５４，，の間隔（ピッチ）を、背部ベース２の傾角に合わせることができ、設定が容易である。
また、上述のように部材を兼用しているため、部品点数を削減でき、コスト低減や軽量化を達成できる。 In the seat device according to the second embodiment configured as described above, since the locking is performed between the base arm 1 and the back base 2 attached to the floor, the backlash of the back can be sufficiently suppressed, The discomfort of the seated person can be sufficiently reduced.
Further, the interval (pitch) between the engaging recesses 454, 454, can be adjusted to the inclination angle of the back base 2, and the setting is easy.
Moreover, since the member is also used as described above, the number of parts can be reduced, and cost reduction and weight reduction can be achieved.

第１の実施の形態のシート装置の概要を模式的に示す斜視図。The perspective view which shows typically the outline | summary of the sheet | seat apparatus of 1st Embodiment. 図１のシート装置の主要な部材を分解して示す説明図。Explanatory drawing which decomposes | disassembles and shows the main members of the sheet | seat apparatus of FIG. 図１のシート装置の主要な部材の組付状態を正面（図１での手前側）から透視して示す説明図であり、（ａ）は背部ベース２を起こした状態、（ｂ）は若干倒した状態を示す。FIG. 2 is an explanatory view showing the assembled state of the main members of the seat device of FIG. 1 as seen through from the front (front side in FIG. 1), (a) is a state in which the back base 2 is raised, (b) is slightly Indicates a defeated state. 第２の実施の形態のシート装置の概要を模式的に示す斜視図。The perspective view which shows typically the outline | summary of the sheet | seat apparatus of 2nd Embodiment. 図４のシート装置の主要な部材を分解して示す説明図。Explanatory drawing which decomposes | disassembles and shows the main members of the sheet | seat apparatus of FIG.

Explanation of symbols

１ベースアーム
１６４長孔
１６４ａ長孔縁
１６４ｂ長孔縁
２背部ベース
２２基部
２３座部支持部
２４ロック受部
２４０ロック受孔
３座部ベース
３２孔
３４ガイド
３４０長孔
４ロック機構
４１ロック第１部材
４１０揺動部材
４１３基端部
４１４先端部
４１４０ロック突起
４２ロック第２部材
４２０ロックプレート
４２２基端部
４２３先端部
４２４ロック孔
４５０ロックレバー
４５０ｃ回転中心
４５４係合凹部
４６０ロック連繋部材
４６３連繋突出部（支持突出部）
４６４係合突出部
５リンク板
５１下端部
５３上端部
５３０連結部 1 base arm 164 long hole 164a long hole edge 164b long hole edge 2 back base 22 base 23 seat support 24 lock receiving part 240 lock receiving hole 3 seat base 32 hole 34 guide 340 long hole 4 locking mechanism 41 lock first Member 410 Oscillating member 413 Base end portion 414 Tip end portion 4140 Lock projection 42 Lock second member 420 Lock plate 422 Base end portion 423 Tip end portion 424 Lock hole 450c Lock lever 450c Rotation center 454 Locking recess 460 Lock connecting member 463 Linking protrusion Part (support protrusion)
464 engagement protrusion 5 link plate 51 lower end 53 upper end 530 connection

Claims

A base arm attached to the floor;
A base that is rotatably supported by a rear portion of the base arm, has a seat support portion for supporting a seat base at a site different from the base, and receives a rotation restriction by a lock mechanism at a site different from the base. A back base having a receiving portion;
A seat base that is supported by the seat base support portion of the back base so as to be rotatable and moves back and forth in conjunction with forward and reverse rotation of the back base;
A lock first member provided on the seat base or the base arm, and a lock second member linked to a lock receiving portion of the back base, and the lock first member and the lock second member A lock mechanism for restricting rotation of the back base by engagement;
A sheet apparatus comprising:

A base arm attached to the floor;
A base is rotatably supported by the rear part of the base arm, and has a seat support part for supporting the seat base at a part below the base, and is subjected to rotation regulation by a lock mechanism at a part different from the base. A back base having a lock receiver;
A link plate having a lower end supported rotatably by a front portion of the base arm and having a connecting portion with a seat base at an upper end;
The rear part is supported rotatably by the seat base support part of the back part base, and the front part is connected to the connecting part of the link plate so as to be rotatably supported, thereby interlocking with the forward / reverse rotation of the back base. A seat base that moves back and forth,
A lock first member provided on the seat base or the base arm, and a lock second member linked to a lock receiving portion of the back base, and the lock first member and the lock second member A lock mechanism for restricting rotation of the back base at an angle determined by the relative positional relationship between the two members at the time of engagement;
A sheet apparatus comprising:

In claim 2,
The lock second member is rotatably supported at the base end portion by the lock receiving portion of the back base, and at the time of rotation, the distal end portion is guided by a guide provided on the seat base, and a plurality of intermediate members are arranged at the intermediate portion. A lock plate having a lock hole of
The lock first member is a rocking member that is supported by a base end portion so as to be rockable by the seat base, and has a lock protrusion that can be engaged with a lock hole of the lock plate at a tip portion.
The sheet apparatus characterized by the above-mentioned.

In claim 3,
The guide is set so that the inclination angle of the lock plate, which is displaced by being guided by the guide by the guide, is substantially constant with respect to the seat base.
The sheet apparatus characterized by the above-mentioned.

In claim 3 or claim 4,
The guide is a long hole formed in the seat base,
The lock plate is guided by being inserted into the elongated hole through a protrusion protruding from the tip thereof.
The sheet apparatus characterized by the above-mentioned.

In any one of Claims 2-5,
The lock receiving portion is provided at a site below the seat support portion,
The sheet apparatus characterized by the above-mentioned.

In claim 2,
The lock first member is a lock lever that is rotatably supported by the base arm and has a plurality of engaging recesses arranged in parallel so as to be sequentially away from the rotation center,
The lock second member is a lock linking member having a rod-like or cylindrical engagement protrusion that can be engaged with an engagement recess of the lock lever,
Rotation regulation of the back base is determined by determining an engagement recess of the lock lever which is an engagement partner of the engagement protrusion of the lock connecting member by forward / reverse shift of the lock receiving portion accompanying forward / reverse rotation of the back base. The angle of time is determined,
The sheet apparatus characterized by the above-mentioned.

In claim 7,
The base arm has a long hole along a movement locus drawn by the engagement protrusion of the lock second member due to a forward / reverse shift of the lock receiving portion accompanying forward / reverse rotation of the back base,
The engagement protrusion of the lock linking member penetrates the elongated hole and engages with the engagement recess of the lock lever, and the range of movement is restricted by the edges at both ends in the longitudinal direction of the elongated hole.
The sheet apparatus characterized by the above-mentioned.

In claim 7,
The seat base is rotatably supported by the back base by inserting a rod-like or cylindrical support projection protruding from the seat support portion of the back base into a hole provided in a rear portion thereof. And
The back base is inserted into a lock receiving hole provided as a lock receiving portion at a site different from the base, through a rod-like or cylindrical connecting protrusion protruding from the lock connecting member toward the back base. And linked with the lock linking member,
A support protrusion in which the seat base supporting portion of the back base and a lock receiving hole provided as the lock receiving portion are used together, and the connecting protrusion of the lock connecting member protrudes from the seat base supporting portion of the back base Used as part,
The sheet apparatus characterized by the above-mentioned.