JP2009039457A

JP2009039457A - Upper arm unit of folding table

Info

Publication number: JP2009039457A
Application number: JP2007210547A
Authority: JP
Inventors: Koichiro Tomimoto; 浩一郎冨本; Naoyuki Maekawa; 尚幸前川
Original assignee: Itoki Corp
Current assignee: Itoki Corp
Priority date: 2007-08-10
Filing date: 2007-08-10
Publication date: 2009-02-26
Anticipated expiration: 2027-08-10
Also published as: JP5080901B2

Abstract

PROBLEM TO BE SOLVED: To provide an upper arm unit of a folding table which has upper arms attached to the lower surfaces of both sides of a top panel and connected to the upper end of a leg body in such a way as turned in the vertical direction and has lock mechanism parts disposed inside the upper arms for retaining the top panel in a horizontal attitude or in a raised attitude, and permitting the confirmation of motions and stock management as a unit by composing the left and right lock mechanism parts as a unit. SOLUTION: A lock metal fitting 17 and an operation member 18 for operating the lock metal fitting are independently turnably disposed between side panels 15 of the upper arms 13, and a lock pin 22 to be engaged with a top panel fixture 16 is attached to the front end of the lock metal fitting. The lock metal fitting is urged by a resilient urging means 25 in the direction of engaging the lock pin with the top panel fixture, The operation member has a presser part 59 to abut on an operation piece 28 of the lock metal fitting to drive the operation piece in the unlocking direction, and a square hole 58, to which a shaft 53 to associate the left and right lock mechanism parts is fitted unturnably, is formed to penetrate the center part of the presser part. COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、折畳み式テーブルの上アームユニットに係わり、更に詳しくは天板を略水平な水平姿勢と上方へ回動させた起立姿勢とることが可能な折畳み式テーブルの上アームユニットに関するものである。 The present invention relates to an upper arm unit of a foldable table, and more particularly to an upper arm unit of a foldable table capable of taking an upright position by rotating a top plate in a substantially horizontal horizontal position and upward. .

従来から、左右の脚体の上端部に、天板の下面両側部を上下回動可能に連結し、該天板を略水平な使用状態と上方へ回動させた折畳み状態とに固定する折畳み式テーブルは各種提供されている。そして、天板の両側下面に取付けた上アームを脚体の上端部に上下回動可能に連結するとともに、天板が水平姿勢と起立姿勢とを維持するロック機構を上アーム内に設けることも公知である。 Conventionally, the upper side of the left and right legs are connected to the upper and lower sides of the top plate so that the top plate can be turned up and down, and the top plate is fixed in a substantially horizontal use state and a folded state in which the top plate is turned upward. Various formula tables are provided. An upper arm attached to both lower surfaces of the top plate is connected to the upper end of the leg so as to be vertically rotatable, and a lock mechanism for maintaining the horizontal posture and the standing posture of the top plate may be provided in the upper arm. It is known.

例えば、特許文献１には、脚体の左右のブラケットに、天板裏面の左右両側の天板受け金具が枢支ピンを介して枢着され、後部位置でロック部材が天板受け金具に枢支され、ブラケットの周縁部に２つの係止凹部を有し、ロック部材には枢支部を中心とする半径方向の長孔が形成され、また天板受け金具には長手方向に長孔が形成され、ロック部材の長孔と天板受け金具の長孔とに遊嵌されたロックピンが天板の水平姿勢で下位の係止凹部に、起立姿勢では上位の係止凹部にそれぞれ係合し、これら係合状態で長孔が係止凹部の凹入方向に斜交するよう設定され、ロックピンを係合方向に付勢するロックばねを備え、左右のロック部材が連結杆を介して一体化され、両ロック部材の少なくとも一方に操作レバーが固設された折り畳み式テーブルが開示されている。 For example, in Patent Document 1, the left and right top plate brackets are pivotally attached to the left and right brackets of the leg via pivot pins, and the lock member is pivoted to the top plate bracket at the rear position. It has two locking recesses on the peripheral edge of the bracket, a long slot in the radial direction is formed in the lock member, and a long hole is formed in the longitudinal direction in the top plate bracket. The lock pin loosely fitted in the long hole of the lock member and the long hole of the top plate bracket is engaged with the lower locking recess in the horizontal position of the top plate and in the upper locking recess in the standing position. In the engaged state, the long hole is set so as to cross obliquely in the direction in which the locking recess is inserted, and includes a lock spring that urges the lock pin in the engagement direction, and the right and left lock members are integrated via the connecting rod. Foldable table with an operating lever fixed to at least one of the lock members There has been disclosed.

しかし、特許文献１に記載されたロック装置は、ロックピンの両端部がそれぞれロック部材の長孔と天板受け金具の長孔とが交差する位置に遊嵌し、一対のブラケットの周縁部に形成された係止凹部に同時に係合するように、ロックピンの中間部の一点をロックばねで係合方向に付勢した構造であるので、組立時に４つの長孔にロックピンを同時に挿入する作業を伴うとともに、ロック部材の枢軸にコイル部を挿入したロックばねの弾性片をロックピンに係止する作業が必要であり、組立に手間がかかるばかりでなく、一対のブラケットの両係止凹部にロックピンを同時に係合するようにするには、脚体間に渡設された水平フレームへの正確に二枚のブラケットを溶接しなければならず、高い溶接精度が要求され、更にロックピンの中間部の一点をロックばねで付勢するので、ロックピンが傾斜して両側の係止凹部に同時に係合することが困難になることも予想される。更に、左右のロック部材が直接連結杆を介して一体化した構造であるので、高い精度が出てない場合には左右のロック部材が正確に連動せず、ロック操作に遅れや進みが生じ、ロックが不完全になる恐れがある。 However, in the lock device described in Patent Document 1, both end portions of the lock pin are loosely fitted at positions where the long holes of the lock member and the long holes of the top plate brackets intersect, and the peripheral portions of the pair of brackets. Since one point of the middle part of the lock pin is urged in the engagement direction by a lock spring so as to be simultaneously engaged with the formed locking recess, the lock pin is simultaneously inserted into the four long holes during assembly. In addition to the work, it is necessary to lock the elastic piece of the lock spring with the coil portion inserted into the pivot of the lock member to the lock pin. In order to simultaneously engage the lock pin with each other, it is necessary to weld two brackets to a horizontal frame that is spanned between the legs, and high welding accuracy is required. In the middle Since biasing the points with locking spring, it is expected that the lock pin is difficult to simultaneously engage the locking recesses of the sides inclined. In addition, since the left and right lock members are integrated through a direct connecting rod, if the high accuracy is not achieved, the left and right lock members do not interlock correctly, and the locking operation is delayed or advanced, The lock may be incomplete.

一方、特許文献２には、左右の脚体の上端部に、天板の下面両側部を上下回動可能に連結し、該天板を略水平な使用状態と上方へ回動させた折畳み状態とに固定する折畳み式テーブルのロック装置であって、前記脚体に設けた支持板に主軸にて前記天板を回動可能に連結するとともに、該支持板の縁部に第１係合部と第２係合部を形成し、前記天板下面の両側部にそれぞれ上下傾動可能に配した規制部材の先端部に突設した規制部が、使用状態時に前記第１係合部に係合し、折畳み状態時に前記第２係合部に係合すべく該規制部材を弾性付勢するとともに、該規制部材の基端部に設けた操作片に当接して、前記規制部が第１係合部又は第２係合部から離れる方向に前記規制部材を操作する操作部材を、天板下面の両側部にそれぞれ回動可能に設けた折畳み式テーブルのロック装置が開示されている。 On the other hand, Patent Document 2 discloses a folded state in which upper and lower legs are connected to both upper and lower legs so that both sides of the lower surface of the top plate can be turned up and down, and the top plate is rotated substantially horizontally and upward. A folding table locking device that is fixed to the leg plate, wherein the top plate is pivotally connected to a support plate provided on the leg by a main shaft, and a first engagement portion is provided at an edge of the support plate. And a second engaging portion, and a restricting portion projecting from a leading end portion of a restricting member disposed on both side portions of the bottom surface of the top plate so as to be vertically tiltable engages with the first engaging portion when in use. In the folded state, the restricting member is elastically biased to engage with the second engaging portion, and abuts against an operation piece provided at a base end portion of the restricting member, so that the restricting portion is in the first engagement. The operation member for operating the restriction member in a direction away from the joint portion or the second engagement portion can be rotated on both side portions of the lower surface of the top plate. Locking device is disclosed in Northern folding table.

この特許文献２では、脚体に設けた支持板の係合部に係合して天板の姿勢を保持する規
制部材と、該規制部材を傾動操作する操作部材を別体で形成し、規制部材の規制部が支持板の係合部に係合するように該規制部材を弾性付勢し、また左右の操作部材をシャフトで連動するようにしたので、左右両側において自動的にロックされるので、ロック操作に遅れや進みが生じる恐れがないのである。しかし、支持板の係合部に係合する規制部が規制部材の先端に固定されているので、確実にロックするには規制部材自体の精度と取付精度が要求され、またロック時の規制力が規制部材の枢軸に直接かかるので、枢軸に対する強度要求も高くなる。また、前記規制部材は、連動シャフトを貫通させて装着してはじめて、所定位置で回動動作可能となるので、ロック機構の動作確認をするには連動シャフトを装着しなければならないといった不都合があった。
特開平６−１５４０３２号公報特開２００４−１２１４４１号公報 In Patent Document 2, a regulating member that engages with an engaging portion of a support plate provided on a leg and maintains the posture of the top plate and an operation member that tilts the regulating member are formed separately. The restricting member is elastically biased so that the restricting portion of the member engages with the engaging portion of the support plate, and the left and right operating members are interlocked with the shaft, so that the left and right sides are automatically locked. Therefore, there is no possibility of delay or advance in the lock operation. However, since the restricting portion that engages with the engaging portion of the support plate is fixed to the tip of the restricting member, accuracy and mounting accuracy of the restricting member itself are required for reliable locking, and the restricting force at the time of locking Since it is directly applied to the pivot of the restricting member, the strength requirement for the pivot is also increased. In addition, since the regulating member can be rotated at a predetermined position only after being mounted through the interlocking shaft, there is a disadvantage that the interlocking shaft must be mounted in order to check the operation of the lock mechanism. It was.
JP-A-6-154032 JP 2004-121441 A

本発明が前述の状況に鑑み、解決しようとするところは、左右の脚体の上端部に、天板の下面両側部に取付けた上アームを上下回動可能に連結し、第１係合部と第２係合部を有する天板固定金具を前記脚体に関連した固定部に設けて前記上アーム内に配置し、該天板を水平姿勢と上方へ回動させた起立姿勢とに固定する折畳み式テーブルにおいて、左右のロック機構部をユニットとして構成し、動作確認も在庫管理もユニットで行えるようになした折畳み式テーブルの上アームユニットを提供する点にある。 In view of the above-mentioned situation, the present invention intends to solve the problem by connecting the upper arms attached to the lower sides of the top plate to the upper ends of the left and right legs so as to be rotatable up and down. And a top plate fixing bracket having a second engaging portion is provided in a fixing portion related to the leg body and disposed in the upper arm, and the top plate is fixed to a horizontal posture and an upright posture rotated upward. In the folding table, the left and right lock mechanism sections are configured as a unit, and an upper arm unit of the folding table that can perform operation check and inventory management by the unit is provided.

本発明は、前述の課題解決のために、左右の脚体の上端部に、天板の下面両側部に取付けた上アームを上下回動可能に連結し、第１係合部と第２係合部を有する天板固定金具を前記脚体に関連した固定部に設けて前記上アーム内に配置し、該天板を水平姿勢と上方へ回動させた起立姿勢とに固定する折畳み式テーブルの上アームユニットであって、前記上アームの両側板間に、ロック金具と該ロック金具を操作する操作部材を独立して回動可能に設け、前記ロック金具の先端部に前記天板固定金具の第１係合部又は第２係合部に係合するロックピンを備えるとともに、該ロック金具をロックピンが前記天板固定金具に係合する方向に弾性付勢手段で付勢し、前記操作部材にはロック金具の操作片に当接してロック解除方向に駆動する押圧部を備えているとともに、中央部に左右の機構部を連動するシャフトを回転不能に嵌合する角孔を貫通形成したことを特徴とする折畳み式テーブルの上アームユニットを構成した（請求項１）。 In order to solve the above-mentioned problems, the present invention connects the upper arms attached to the lower side portions of the top plate to the upper end portions of the left and right legs so as to be able to rotate up and down, and the first engaging portion and the second engaging portion. A foldable table is provided with a top plate fixing bracket having a joint portion provided in a fixed portion related to the leg body and disposed in the upper arm, and fixed to a horizontal posture and an upright posture rotated upward. An upper arm unit, wherein a lock metal fitting and an operation member for operating the lock metal fitting are rotatably provided between both side plates of the upper arm, and the top plate fixing metal fitting is provided at a distal end portion of the lock metal fitting. A lock pin that engages with the first engagement portion or the second engagement portion, and the lock fitting is biased by an elastic biasing means in a direction in which the lock pin engages with the top plate fixing bracket, The operating member has a pressing part that contacts the operation piece of the lock fitting and drives it in the unlocking direction. Together and example, to constitute a arm unit on the folding table, characterized in that the square hole to be fitted non-rotatably a shaft interlocking mechanism of the left and right in the center through formation (Claim 1).

ここで、前記上アームの両側板に形成した円孔に、両側板の内側から中央に前記シャフトを嵌挿する角孔を形成したブッシュを回動可能に嵌入するとともに、両ブッシュの内側端部に前記操作部材の両端部を抜止め嵌合して装着し、該操作部材の角孔と両ブッシュの角孔を連通させてなることが好ましい（請求項２）。 Here, in the circular holes formed in the both side plates of the upper arm, a bush formed with a square hole for inserting the shaft from the inside to the center of the both side plates is rotatably fitted, and the inner end portions of both bushes It is preferable that both end portions of the operation member are fitted and fitted to each other, and the square holes of the operation member and the square holes of both bushes are communicated with each other (Claim 2).

また、前記ロック金具は一対の平行なロック片を有するとともに、両ロック片の基端側にそれぞれ前記操作片を形成し、前記操作部材の押圧部の中央部に、両操作片間に係合してロック金具の位置決めをするスペーサ部を突設してなることがより好ましい（請求項３）。 Further, the lock fitting has a pair of parallel lock pieces, the operation pieces are formed on the base end sides of the both lock pieces, and engaged between the operation pieces at the center of the pressing portion of the operation member. It is more preferable to project a spacer portion for positioning the lock fitting.

請求項１によれば、上アームの両側板間にロック金具と該ロック金具を操作する操作部材を独立して回動可能に設け、更にロック金具をその先端部に備えたロックピンが天板固定金具に係合する方向に弾性付勢手段で付勢したので、製造上のバラツキによる天板のガタツキを防止することができ、また従来は連動シャフトを装着しないとロックピンの動作確認ができなかったが、連動シャフトを通さなくても操作部材を回動させてロック金具を
操作することができるので、動作確認することができる。また、ロック金具と操作部材を分離し、しかもロック金具を天板固定金具に係合する方向に弾性付勢手段しているので、連動シャフト、操作部材の製造バラツキに関係なく、ロック金具が個別にロック方向に傾動するので、確実且つガタツキなくロックがかかり、もって天板を水平姿勢と起立姿勢とにガタツキなく維持することができる。そして、上アームがユニット化されるので、動作確認をした上でユニットとして在庫管理ができるので、効率的である。 According to the first aspect of the present invention, the lock metal fitting and the operation member for operating the lock metal fitting are rotatably provided between the both side plates of the upper arm, and the lock pin provided with the lock metal fitting at the tip portion is provided with the top plate. The elastic urging means urged in the direction to engage with the fixing bracket, so that it is possible to prevent rattling of the top plate due to manufacturing variations, and conventionally, the operation of the lock pin can be confirmed if the interlocking shaft is not installed. However, the operation member can be rotated to operate the lock fitting without passing through the interlocking shaft, so that the operation can be confirmed. In addition, since the lock bracket and the operating member are separated and elastically biased in the direction in which the lock bracket is engaged with the top plate fixing bracket, the lock bracket is individually connected regardless of manufacturing variations of the interlocking shaft and the operating member. Therefore, the top plate can be maintained in the horizontal posture and the standing posture without rattling. Since the upper arm is unitized, inventory control can be performed as a unit after checking the operation, which is efficient.

請求項２によれば、上アームの両側板に形成した円孔に、両側板の内側から中央に前記シャフトを嵌挿する角孔を形成したブッシュを回動可能に嵌入するとともに、両ブッシュの内側端部に前記操作部材の両端部を抜止め嵌合して装着し、該操作部材の角孔と両ブッシュの角孔を連通させてなるので、操作部材を上アームの両側板間に回動可能に組み付ける作業が極めて簡単になり、連動シャフトを操作部材に通さなくてもそれ自体で回動操作するので、ロック金具との連係動作を確認することができる。 According to the second aspect of the present invention, the bush formed with the square hole into which the shaft is inserted into the center from the inside of the both side plates is rotatably fitted in the circular holes formed in the both side plates of the upper arm, Since both ends of the operating member are secured and fitted to the inner end, and the square holes of the operating member and the square holes of both bushes are in communication, the operating member is rotated between the side plates of the upper arm. The operation of assembling in a movable manner becomes extremely simple, and the interlocking operation with the lock fitting can be confirmed because the interlocking shaft is rotated by itself without passing through the operating member.

請求項３によれば、ロック金具は一対の平行なロック片を有するとともに、両ロック片の基端側にそれぞれ前記操作片を形成し、前記操作部材の押圧部の中央部に、両操作片間に係合してロック金具の位置決めをするスペーサ部を突設してなるので、上アームの両側板間に回動可能に装着したロック金具がその支軸の方向へ移動することを規制し、常にロック金具を上アームの両側板間の中央に位置させることができるので、ロック動作及びロック解除動作をスムーズ且つ確実に行うことができる。 According to the third aspect of the present invention, the lock fitting has a pair of parallel lock pieces, the operation pieces are formed on the base end sides of the both lock pieces, and both the operation pieces are provided at the center of the pressing portion of the operation member. Since the spacer part that engages between them and projects the positioning of the lock fitting protrudes, the movement of the lock fitting that is rotatably mounted between the both side plates of the upper arm is restricted. Since the lock fitting can always be positioned at the center between the both side plates of the upper arm, the locking operation and the unlocking operation can be performed smoothly and reliably.

次に、添付図面に示した実施形態に基づき、本発明を更に詳細に説明する。図１は、本実施形態の折畳み式テーブルの水平姿勢における全体側面図、図２は起立姿勢における収納状態の側面図、図３は回動機構部及びロック機構部を示す部分側面図、図４〜図２０は各部の詳細を示している。図中符号１は脚体、２は天板、３は幕板、４は機構部、５は操作レバーをそれぞれ示している。 Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. 1 is an overall side view of the folding table of the present embodiment in a horizontal posture, FIG. 2 is a side view of the stowed state in a standing posture, FIG. 3 is a partial side view showing a rotating mechanism portion and a lock mechanism portion, and FIG. 20 shows details of each part. In the figure, reference numeral 1 denotes a leg, 2 denotes a top plate, 3 denotes a curtain plate, 4 denotes a mechanism portion, and 5 denotes an operation lever.

本実施形態の折畳み式テーブルは、左右の脚体１，１の上端部に、天板２の下面両側部を上下回動可能に連結し、該天板２を略水平な水平姿勢（図１参照）と天板２の前部を上方へ回動させた起立姿勢（図２参照）とに変更することができるとともに、前記天板２の後部下方に配した幕板３を、天板２後部下方に接近して垂下した使用状態と両脚体１，１の後縁に沿った折畳み状態との間を移動可能に前記天板２と連動させてリンク連結したものであり、水平姿勢と起立姿勢になったときロック可能な構造となっている。起立姿勢では前後にスタッキング可能となっている。 The foldable table of this embodiment is connected to the upper ends of the left and right legs 1, 1 so that both sides of the lower surface of the top plate 2 can be turned up and down, and the top plate 2 is placed in a substantially horizontal horizontal position (FIG. 1). Reference) and a standing posture (see FIG. 2) in which the front portion of the top plate 2 is rotated upward, and the curtain plate 3 disposed below the rear portion of the top plate 2 is replaced with the top plate 2. It is linked to the top plate 2 so as to be movable between a use state in which it hangs down close to the rear and a folded state along the rear edges of both legs 1 and 1, and is connected to the top plate 2 in a horizontal position. It has a structure that can be locked when it is in a posture. In the standing posture, it can be stacked back and forth.

前記脚体１の上端と天板２は、両側下面においてそれぞれ機構部４，４によって連結され、側面に露出した操作レバー５を下方へ押し下げることによりロックが解除され、天板２を水平姿勢と起立姿勢の間で回動変位させることができ、そして水平姿勢と起立姿勢に至ったとき、自動的にロックがかかるようになっている。本実施形態では、前記操作レバー５を押し下げてロックを解除するようにしたので、不意に足や他物が操作レバー５に当たってもロックが解除されない。また、天板２の側部寄り位置に着座している使用者の膝が操作レバー５に当たる場合があり、そのような場合にもロックが解除されない。 The upper end of the leg 1 and the top plate 2 are connected to each other by the mechanism portions 4 and 4 on the lower surfaces of both sides, and the lock is released by pushing down the operation lever 5 exposed on the side surface downward, so that the top plate 2 is in a horizontal posture. It can be rotated and displaced between the standing postures and is automatically locked when the horizontal posture and the standing posture are reached. In this embodiment, since the operation lever 5 is pushed down to release the lock, the lock is not released even if a foot or another object hits the operation lever 5 unexpectedly. Further, the knee of the user sitting near the side of the top plate 2 may hit the operation lever 5, and in such a case, the lock is not released.

先ず、前記脚体１は、前後方向を向いた接地脚６の後部から斜め前上方へ延びた支持脚７を有する正面視略倒Ｌ字形であり、アルミダイカスト製で一体形成したものである。しかし、本発明では脚体１の構造には限定されない。そして、両側の脚体１，１の上端部間を脚連結部材８を介して連結管９で連結して一体化している。尚、前記脚連結部材８は、後述のように前記天板２の回転軸を兼ねている。 First, the leg body 1 has a substantially inverted L shape in front view having a support leg 7 extending obliquely forward and upward from the rear part of the grounding leg 6 facing in the front-rear direction, and is integrally formed of aluminum die casting. However, the structure of the leg 1 is not limited in the present invention. The upper ends of the leg bodies 1, 1 on both sides are connected and integrated by a connecting pipe 9 via a leg connecting member 8. The leg connecting member 8 also serves as a rotating shaft of the top plate 2 as will be described later.

前記機構部４は、図１及び図１７に示すように、全体を合成樹脂製のカバー１０で覆われ、前部側面から前記操作レバー５が露出している。前記カバー１０の後部には天板２の下面後部に沿って設けたダクト１１の両端部を支持している。尚、前記ダクト１１の上位に天板２から出没自在なコンセントボックス１２を設けている。そして、前記カバー１０の内部には機構部４のフレームとなる金属製の上アーム１３が天板２の下面に取付けられている。つまり、左右の脚体１，１の上端部に、天板２の下面両側部に取付けた上アーム１３，１３を上下回動可能に連結している。 As shown in FIGS. 1 and 17, the mechanism portion 4 is entirely covered with a synthetic resin cover 10, and the operation lever 5 is exposed from the front side surface. The rear part of the cover 10 supports both ends of a duct 11 provided along the rear part of the lower surface of the top plate 2. In addition, an outlet box 12 that can be moved up and down from the top plate 2 is provided above the duct 11. Inside the cover 10, a metal upper arm 13 that serves as a frame of the mechanism unit 4 is attached to the lower surface of the top plate 2. That is, the upper arms 13 and 13 attached to the upper ends of the left and right legs 1 and 1 on both sides of the lower surface of the top plate 2 are connected so as to be vertically rotatable.

前記上アーム１３は、図７及び図８に示すように、前記天板２に取付ける固定板１４の両側から側板１５，１５を垂下した断面略コ字形で、側面視逆台形状の部材である。そして、前記上アーム１３の両側板１５，１５間に、前記連結管９の端部に固定した天板固定金具１６と、ロック金具１７及び該ロック金具１７を操作する操作部材１８を配している。 As shown in FIGS. 7 and 8, the upper arm 13 is a member having an inverted trapezoidal shape in a side view, having a substantially U-shaped cross section in which the side plates 15 and 15 are suspended from both sides of the fixing plate 14 attached to the top plate 2. . Between the side plates 15 and 15 of the upper arm 13, a top plate fixing bracket 16 fixed to the end of the connecting pipe 9, a lock fitting 17 and an operation member 18 for operating the lock fitting 17 are arranged. Yes.

更に詳しくは、図３〜図９に示すように、前記脚体１に関連した固定部に設けた天板固定金具１６に第１係合部１９と第２係合部２０を形成し、前記上アーム１３の両側板１５，１５に、前記ロック金具１７の中間部を支軸２１にて上下回動可能に設けるとともに、前記天板固定金具１６の第１係合部１９又は第２係合部２０に係合して水平姿勢と起立姿勢を維持するロックピン２２を、係合位置に案内するように前記上アーム１３の両側板１５，１５に形成した長孔２３，２３に遊挿するとともに、前記ロック金具１７の先端部に形成した二股状の係止部２４に前記ロックピン２２を受け入れ、更にロック金具１７をロックピン２２が第１係合部１９又は第２係合部２０に係合する方向に弾性付勢手段２５で付勢し、前記操作部材１８の操作に基づいてロック金具１７を回動させてロックピン２２を前記長孔２３，２３に沿って退避させて第１係合部１９又は第２係合部２０との係合を解除するのである。つまり、水平姿勢と起立姿勢では、弾性付勢手段２５の付勢力によって、前記ロックピン２２は長孔２３，２３で案内されて自動的に前記天板固定金具１６の第１係合部１９又は第２係合部２０に係合してロックがかかるのである。尚、本発明では、前記ロックピン２２をロック金具１７の先端部に一体的に固定されていても構わない。 More specifically, as shown in FIG. 3 to FIG. 9, the first engagement portion 19 and the second engagement portion 20 are formed on the top plate fixing bracket 16 provided in the fixing portion related to the leg 1, and An intermediate portion of the lock fitting 17 is provided on both side plates 15 and 15 of the upper arm 13 so as to be vertically rotatable by a support shaft 21, and the first engagement portion 19 or the second engagement of the top plate fixing bracket 16 is provided. The lock pin 22 that engages with the portion 20 and maintains the horizontal posture and the standing posture is loosely inserted into the long holes 23 and 23 formed in the side plates 15 and 15 of the upper arm 13 so as to be guided to the engagement position. At the same time, the lock pin 22 is received in a bifurcated locking portion 24 formed at the tip of the lock fitting 17, and the lock pin 22 is further connected to the first engagement portion 19 or the second engagement portion 20. The elastic biasing means 25 biases the engaging member in the engaging direction, and the operation member 18 is operated. Than is to disengage the lock fitting first engagement portion 19 17 and the lock pin 22 is rotated to retract along the long hole 23 or the second engagement portion 20 on the basis of. That is, in the horizontal posture and the standing posture, the lock pin 22 is guided by the long holes 23 and 23 by the urging force of the elastic urging means 25, and automatically the first engagement portion 19 of the top plate fixing bracket 16 or The second engaging portion 20 is engaged and locked. In the present invention, the lock pin 22 may be integrally fixed to the distal end portion of the lock fitting 17.

ここで、前記ロック金具１７は、中間部で連続した一対の平行なロック片２６，２６を有し、両ロック片２６，２６の先端部にそれぞれ二股状の係止部２４，２４を形成し、前記上アーム１３の両側板１５，１５間に装着した状態で、両ロック片２６，２６の間に前記天板固定金具１６が位置するように構成している。また、前記ロック金具１７の両ロック片２６，２６に形成した前記支軸２１を挿通する軸孔２７，２７よりも基端側に、前記操作部材１８で回動操作するための操作片２８，２８を設けている。前記弾性付勢手段２５は、キックばねで構成し、該キックばね２５のコイル部２５Ａを前記ロック金具１７の一側の支軸２１に挿通し、一方に弾性片２５Ｂを前記上アーム１３の固定板１４に当止し、他方のクランク状に屈曲した弾性片２５Ｃを前記ロック金具１７の両ロック片２６，２６を跨ぐように係止している。 Here, the lock fitting 17 has a pair of parallel lock pieces 26 and 26 which are continuous at an intermediate portion, and bifurcated locking portions 24 and 24 are formed at the distal ends of the lock pieces 26 and 26, respectively. The top plate fixing bracket 16 is configured to be positioned between the lock pieces 26 and 26 in a state of being mounted between the both side plates 15 and 15 of the upper arm 13. Further, an operating piece 28 for rotating the operating member 18 to the proximal end side from a shaft hole 27, 27 through which the support shaft 21 formed in both lock pieces 26, 26 of the lock fitting 17 is inserted. 28 is provided. The elastic urging means 25 is constituted by a kick spring, the coil portion 25A of the kick spring 25 is inserted into the support shaft 21 on one side of the lock fitting 17, and the elastic piece 25B is fixed to the upper arm 13 on one side. The elastic piece 25C that is abutted against the plate 14 and bent in the other crank shape is locked so as to straddle both the lock pieces 26, 26 of the lock fitting 17.

また、前記天板２が水平姿勢あるいは起立姿勢をとるとき、前記天板固定金具１６の第１係合部１９及び第２係合部２０の係合縁に沿った方向に前記長孔２３，２３を形成して、ロック動作時とロック解除動作時にスムーズにロックピン２２が係合位置へ移動することができるようにしている。 Further, when the top plate 2 takes a horizontal posture or an upright posture, the elongated holes 23, in the direction along the engagement edges of the first engagement portion 19 and the second engagement portion 20 of the top plate fixing bracket 16. 23 is formed so that the lock pin 22 can smoothly move to the engagement position during the locking operation and the unlocking operation.

そして、図３及び図４に示すように、前記天板固定金具１６の前側に前記第１係合部１９と第２係合部２０を形成するとともに、その前方に前記ロック金具１７を配置し、水平姿勢において、前記第１係合部１９にロックピン２２が係合して天板２の前部の上方回動を規制するとともに、前記天板固定金具１６の上端に形成した第１当止部２９が前記上アーム１３の固定板１４に当止して天板２の前部の下方回動を規制し、起立姿勢において、
前記第２係合部２０にロックピン２２が係合して天板２の前部の前方回動を規制するとともに、前記天板固定金具１６の後端に形成した第２当止部３０が前記上アーム１３の固定板１４に当止して天板２の前部の後方回動を規制している。 3 and 4, the first engagement portion 19 and the second engagement portion 20 are formed on the front side of the top plate fixing bracket 16, and the lock fitting 17 is disposed in front of the first engagement portion 19 and the second engagement portion 20. In the horizontal posture, the lock pin 22 engages with the first engagement portion 19 to restrict the upward rotation of the front portion of the top plate 2 and the first contact formed on the upper end of the top plate fixing bracket 16. In the standing posture, the stop portion 29 stops against the fixed plate 14 of the upper arm 13 to restrict the downward rotation of the front portion of the top plate 2.
A lock pin 22 engages with the second engagement portion 20 to restrict forward rotation of the front portion of the top plate 2, and a second abutment portion 30 formed at the rear end of the top plate fixing bracket 16 includes The rear arm of the top plate 2 is restrained from rotating backward by stopping against the fixed plate 14 of the upper arm 13.

次に、回動機構部について、図４〜図１２に基づいて説明する。前記上アーム１３の外側の側板１５には、円形の軸受孔３１を形成するとともに、内側の側板１５にはＵ字開口３２を形成し、該Ｕ字開口３２の上部に連続するように前記固定板１４に前記天板固定金具１６を挿通可能な切欠部３３を形成している。前記Ｕ字開口３２の下部の半円部分は前記軸受孔３１と同軸位置になっている。そして、前記軸受孔３１に合成樹脂製の摺動リング３４を外側から嵌着し、また前記Ｕ字開口３２と切欠部３３とに下部に前記連結管９に摺動可能に外嵌する合成樹脂製の閉塞部材３５を外側から嵌着し、前記摺動リング３４に外側から回動可能に嵌合した前記脚連結部材８を上アーム１３内で前記連結管９の端部に回動不能に連結するようになっている。 Next, a rotation mechanism part is demonstrated based on FIGS. A circular bearing hole 31 is formed in the outer side plate 15 of the upper arm 13, and a U-shaped opening 32 is formed in the inner side plate 15, and the fixing is performed so as to be continuous with the upper portion of the U-shaped opening 32. A notch 33 through which the top plate fixing bracket 16 can be inserted is formed in the plate 14. A semicircular portion below the U-shaped opening 32 is coaxial with the bearing hole 31. Then, a synthetic resin sliding ring 34 is fitted into the bearing hole 31 from the outside, and the synthetic resin is slidably fitted to the U-shaped opening 32 and the notch 33 so as to be slidable on the connecting pipe 9 below. A closing member 35 made of metal is fitted from the outside, and the leg connecting member 8 fitted to the sliding ring 34 so as to be rotatable from the outside is made unrotatable at the end of the connecting tube 9 in the upper arm 13. It comes to be connected.

ここで、前記脚連結部材８は、正面視略倒Ｌ字形を有し、下方に延びた連結部３６を前記脚体１の支持脚７に嵌合し、高さ調節してボルト止めできるようになっており、水平に延びた水平部３７には円柱状の軸部３８を有し、該軸部３８を前記摺動リング３４に回動可能に嵌合できるようになっている。つまり、前記天板２は、脚体１に連結された前記脚連結部材８の軸部３８が、前記上アーム１３の外側の側板１５に形成した軸受孔３１に摺動リング３４を介して回動可能に連結することにより、上下回動可能となっている。 Here, the leg connecting member 8 has a substantially inverted L shape when viewed from the front, and the connecting portion 36 extending downward is fitted to the support leg 7 of the leg 1 so that the height can be adjusted and bolted. The horizontal portion 37 that extends horizontally has a cylindrical shaft portion 38, and the shaft portion 38 can be rotatably fitted to the sliding ring 34. In other words, the top plate 2 is configured such that the shaft portion 38 of the leg connecting member 8 connected to the leg 1 rotates around the bearing hole 31 formed in the side plate 15 outside the upper arm 13 via the sliding ring 34. By being movably connected, it can be turned up and down.

本実施形態では、前記閉塞部材３５は、一体成形で作製し、前記連結管９を嵌合するリング部３９にスリット４０を入れて、捩じってスリット４０を拡開した状態で前記連結管９に外嵌した後、元の状態に復元した状態で、前記天板固定金具１６を上アーム１３の切欠部３３から挿入し、前記連結管９を前記Ｕ字開口３２内に位置させながら該閉塞部材３５をＵ字開口３２と切欠部３３とに嵌着するようにしている。しかし、図１９及び図２０に示すように、上下二つ割りの閉塞部材４１を合成樹脂で成形し、上部閉塞部材４１Ａと下部閉塞部材４１Ｂを前記上アーム１３のＵ字開口３２内に位置させた前記連結管９を上下から挟んで該Ｕ字開口３２と切欠部３３に嵌着するようにしても良い。 In this embodiment, the closing member 35 is manufactured by integral molding, and a slit 40 is inserted into a ring portion 39 into which the connecting pipe 9 is fitted, and the slit 40 is expanded by twisting the connecting pipe 9. 9, the top plate fixing bracket 16 is inserted from the notch 33 of the upper arm 13 in a state restored to the original state, and the connecting pipe 9 is positioned in the U-shaped opening 32 while being restored. The closing member 35 is fitted into the U-shaped opening 32 and the notch 33. However, as shown in FIGS. 19 and 20, the upper and lower occluding members 41 are formed of synthetic resin, and the upper occluding member 41 A and the lower occluding member 41 B are positioned in the U-shaped opening 32 of the upper arm 13. The connecting tube 9 may be fitted into the U-shaped opening 32 and the notch 33 with the connecting tube 9 sandwiched from above and below.

前述のように、前記上アーム１３の外側の側板１５に形成した軸受孔３１に摺動リング３４を嵌着し、前記脚連結部材８の軸部３８を摺動リング３４に回動可能に嵌挿した構造は、簡単に精度を高くすることができ、もって天板２の上下回動がスムーズに行うことができる。また、前記連結管９も閉塞部材４１で摺動可能に受けるので、撓みやずれを防止することができる。尚、前記連結管９の両端部には、前記天板固定金具１６を溶接して固定するが、該天板固定金具１６の側面を連結管９の端面に当接した状態で溶接できるので、簡単に精度を出すことができる。 As described above, the sliding ring 34 is fitted into the bearing hole 31 formed in the outer side plate 15 of the upper arm 13, and the shaft portion 38 of the leg connecting member 8 is rotatably fitted to the sliding ring 34. The inserted structure can easily increase the accuracy, and the top plate 2 can be smoothly turned up and down. In addition, since the connecting tube 9 is slidably received by the closing member 41, it is possible to prevent bending and displacement. The top plate fixing bracket 16 is welded and fixed to both ends of the connecting tube 9, but the side surface of the top plate fixing bracket 16 can be welded with the end surface of the connecting tube 9 being in contact, Accuracy can be easily obtained.

次に、前記脚連結部材８の水平部３７と、前記連結管９の端部を回転不能に連結する構造を説明する。図７、図９、図１１及び図１２に示すように、前記脚連結部材８の水平部３７の端部には断面が長円形の嵌合部４２を突設するとともに、該水平部３７の端面で嵌合部４２を挟んで両側に突起４３，４３を突設し、更に前記水平部３７には貫通孔４４を形成している。また、前記嵌合部４２の円弧面には螺孔４５，４５を形成している。一方、前記天板固定金具１６の中央部には、前記嵌合部４２を嵌挿する長円形の嵌合孔４６を形成するとともに、前記突起４３，４３を嵌入する孔４７，４７を形成し、更に前記連結管９の端部よりの内部に連結板４８を溶接し、該連結板４８の中心には螺孔４９を形成し、更に前記連結管９の端部の外周面に通孔５０，５０を形成している。 Next, the structure which connects the horizontal part 37 of the said leg connection member 8 and the edge part of the said connection pipe 9 so that rotation is impossible is demonstrated. As shown in FIGS. 7, 9, 11, and 12, an end portion of the horizontal portion 37 of the leg connecting member 8 is provided with a fitting portion 42 having an oval cross section, and the horizontal portion 37 Protrusions 43 are formed on both sides of the end surface with the fitting portion 42 interposed therebetween, and a through hole 44 is formed in the horizontal portion 37. Further, screw holes 45 are formed in the arc surface of the fitting portion 42. On the other hand, an oblong fitting hole 46 into which the fitting portion 42 is inserted is formed at the center of the top plate fixing bracket 16, and holes 47, 47 into which the projections 43, 43 are inserted. Further, a connecting plate 48 is welded to the inside from the end of the connecting tube 9, a screw hole 49 is formed at the center of the connecting plate 48, and a through hole 50 is formed on the outer peripheral surface of the end of the connecting tube 9. , 50 are formed.

そして、前記上アーム１３の両側板１５，１５に、前述のように前記脚連結部材８の水平部３７と前記連結管９の端部を回動可能に装着し、該上アーム１３の内部で、前記脚連
結部材８の嵌合部４２を前記天板固定金具１６の嵌合孔４６に嵌入するとともに、突起４３，４３を孔４７，４７に嵌入した状態で、前記連結管９の側面の通孔５０，５０から螺孔４５，４５にネジ（図示せず）を螺合するとともに、側方から水平部３７の貫通孔４４に挿通したボルト５１を連結板４８の螺孔４９に螺合し、前記脚連結部材８の水平部３７と前記連結管９の端部を引き付け合って強固に連結する。 And, as described above, the horizontal portion 37 of the leg connecting member 8 and the end portion of the connecting tube 9 are rotatably mounted on both side plates 15, 15 of the upper arm 13. The fitting portion 42 of the leg connecting member 8 is fitted into the fitting hole 46 of the top plate fixing bracket 16 and the projections 43 and 43 are fitted into the holes 47 and 47. Screws (not shown) are screwed into the screw holes 45, 45 from the through holes 50, 50, and the bolts 51 inserted from the side into the through holes 44 of the horizontal portion 37 are screwed into the screw holes 49 of the connecting plate 48. And the horizontal part 37 of the said leg connection member 8 and the edge part of the said connection pipe 9 are attracted, and it connects firmly.

次に、前記操作レバー５を操作して、前記操作部材１８を介して前記ロック金具１７を操作する駆動機構を説明する。図３〜図９、図１３〜図１６に示すように、前記操作部材１８を前記上アーム１３の前部の両側板１５，１５に一対のブッシュ５２，５２を用いるとともに、左右連動のための角パイプからなるシャフト５３によって回動可能に設け、更に前記シャフト５３の端部に前記操作レバー５を連結するようになっている。また、前記操作レバー５は左右対称形であり、前記シャフト５３の両端部に同一方向に向けて取付けることができ、端部にはキャップ部材５４，５４を装着してより確実な連結と外観性の向上を図っている。 Next, a drive mechanism that operates the operation lever 5 and operates the lock fitting 17 via the operation member 18 will be described. As shown in FIGS. 3 to 9 and FIGS. 13 to 16, the operating member 18 uses a pair of bushes 52, 52 on the front side plates 15, 15 of the upper arm 13, and is used for left-right interlocking. A shaft 53 made of a square pipe is rotatably provided, and the operation lever 5 is connected to an end of the shaft 53. Further, the operation lever 5 is symmetrical, and can be attached to both ends of the shaft 53 in the same direction, and cap members 54, 54 are attached to the ends so as to achieve more reliable connection and appearance. We are trying to improve.

更に詳しくは、前記ブッシュ５２は、図１３に示すように、合成樹脂製であり、前記上アーム１３の両側板１５，１５に形成した円孔５５，５５に回動可能に嵌合するスリーブ部５６を外側に形成するとともに、中心に前記シャフト５３を回転不能に嵌挿する角孔５７を形成したものである。前記操作部材１８は、図１４に示すように、合成樹脂製であり、中心部に前記シャフト５３を回転不能に嵌挿する角孔５８を形成するとともに、該角孔５８の側方に前記ロック金具１７の操作片２８，２８に下方から当接し、該ロック金具１７を弾性付勢力に抗して回動させる押圧部５９を形成し、該押圧部５９の上面中央部に前記両操作片２８，２８間に係合するスペーサ部６０を突設し、更にロック状態にあるとき、前記上アーム１３の固定板１４に当接して回動を規制する当止部６１を前記押圧部５９の反対側に形成している。ここで、前記操作片２８，２８と押圧部５９の間にクリアランスを設けると、各部材の精度が多少悪くてもロック金具１７のロック動作に支障をきたすことがないので好ましい。 More specifically, as shown in FIG. 13, the bush 52 is made of synthetic resin, and is a sleeve portion that is rotatably fitted in circular holes 55, 55 formed in both side plates 15, 15 of the upper arm 13. 56 is formed outside, and a square hole 57 into which the shaft 53 is non-rotatably inserted is formed at the center. As shown in FIG. 14, the operation member 18 is made of synthetic resin, and has a square hole 58 into which the shaft 53 is non-rotatably inserted at the center, and the lock is formed on the side of the square hole 58. A pressing portion 59 that abuts the operation pieces 28 and 28 of the metal fitting 17 from below and rotates the lock metal fitting 17 against an elastic biasing force is formed. , 28 is provided in a projecting manner, and when it is in a locked state, the abutment portion 61 that abuts against the fixing plate 14 of the upper arm 13 and restricts the rotation is opposite to the pressing portion 59. Formed on the side. Here, it is preferable to provide a clearance between the operation pieces 28 and 28 and the pressing portion 59 because the locking operation of the lock fitting 17 is not hindered even if the accuracy of each member is somewhat poor.

また、前記ブッシュ５２の内側の側面端部には、対抗する位置に外側へ向けて突起部５２Ａ，５２Ａを突設し、前記操作部材１８の角孔５８の両側には、前記ブッシュ５２の内側の側面端部に外嵌し且つ前記突起部５２Ａ，５２Ａに抜止係合する係合片１８Ａ，１８Ａを形成している。 In addition, projecting portions 52A and 52A project outwardly at the opposing side end portions of the bushing 52, and the inner side of the bushing 52 is disposed on both sides of the square hole 58 of the operating member 18. Engagement pieces 18A and 18A are formed which are fitted on the side end portions of the first and second projections 52A and 52A.

そして、前記上アーム１３の両側板１５，１５の円孔５５，５５に、それぞれ内側から前記ブッシュ５２のスリーブ部５６を嵌挿して保持し、上アーム１３の内部に前記操作部材１８を落とし込んで、両前記ブッシュ５２，５２の内側端部に前記係合片１８Ａ，１８Ａを外嵌させて、突起部５２Ａ，５２Ａに係合して抜止め状態で、両ブッシュ５２，５２の間に前記操作部材１８を位置させ、内側のブッシュ５２の角孔５７から前記シャフト５３を嵌合し、順次操作部材１８の角孔５８、外側のブッシュ５２の角孔５７に嵌挿する。この状態で、前記操作部材１８はシャフト５３を介して両ブッシュ５２、５２により回動可能となる。また、前記操作部材１８のスペーサ部６０は、前記ロック金具１７の操作片２８，２８の間に嵌合して位置するので、前記ロック金具１７の支軸２１の方向に対する位置決めがなされるのである。 Then, the sleeve portion 56 of the bush 52 is fitted and held in the circular holes 55 and 55 of the both side plates 15 and 15 of the upper arm 13 from the inside, respectively, and the operation member 18 is dropped into the upper arm 13. The engaging pieces 18A and 18A are fitted on the inner ends of the bushes 52 and 52, and engaged with the protrusions 52A and 52A. The member 18 is positioned, the shaft 53 is fitted from the square hole 57 of the inner bush 52, and sequentially inserted into the square hole 58 of the operation member 18 and the square hole 57 of the outer bush 52. In this state, the operation member 18 can be rotated by the bushes 52, 52 via the shaft 53. Further, since the spacer portion 60 of the operation member 18 is fitted between the operation pieces 28 and 28 of the lock fitting 17, the positioning of the lock fitting 17 in the direction of the support shaft 21 is performed. .

そして、前記両ブッシュ５２、５２と前記操作部材１８を貫通した前記シャフト５３の端部に、前記操作レバー５を取付ける構造を説明する。先ず、前記操作レバー５は、図７、図９、図１０及び図１５に示すように、合成樹脂製の成形品であり、レバー部６２の基部に円筒部６３を形成し、該円筒部６３の中央部に取付部６３Ａを、内部を塞ぐように形成するとともに、該取付部６３Ａに前記シャフト５３を回転不能に嵌入する角孔６４を形成し、更に円筒部６３の側面中央部から前記角孔６４に貫通する取付孔６５を形成してい
る。また、前記操作レバー５の円筒部６３の両側部には、図１６に示すように、合成樹脂製の前記キャップ部材５４が嵌合される。前記キャップ部材５４は、外形が円柱形を有しており、一端面は化粧面６６となり、反対側には前記シャフト５３の中心孔６７に嵌入する係合部６８を突設し、該係合部６８には側面に開口した孔６９を貫通形成している。ここで、前記シャフト５３の端部にも側面に開口した孔７０を形成している。 And the structure which attaches the said operation lever 5 to the edge part of the said shaft 53 which penetrated both the said bushes 52 and 52 and the said operation member 18 is demonstrated. First, as shown in FIGS. 7, 9, 10, and 15, the operating lever 5 is a molded product made of synthetic resin, and a cylindrical portion 63 is formed at a base portion of the lever portion 62. A mounting portion 63A is formed in the central portion of the cylindrical portion 63 so as to block the inside, and a square hole 64 is formed in the mounting portion 63A so that the shaft 53 is non-rotatably inserted. A mounting hole 65 penetrating the hole 64 is formed. Further, as shown in FIG. 16, the cap member 54 made of synthetic resin is fitted to both sides of the cylindrical portion 63 of the operation lever 5. The cap member 54 has a cylindrical outer shape, one end surface is a decorative surface 66, and an engaging portion 68 that fits into the center hole 67 of the shaft 53 is provided on the opposite side to project the engaging member 68. The part 68 is formed with a hole 69 opened in the side surface. Here, the end portion of the shaft 53 is also formed with a hole 70 opened to the side surface.

そして、前記シャフト５３の端部に、前記操作レバー５の角孔６４に嵌挿するとともに、円筒部６３の外側部分に前記キャップ部材５４を嵌挿し、前記係合部６８をシャフト５３の中心孔６７に嵌入し、それから操作レバー５の円筒部６３の外側中央部の取付孔６５からボルト７１を挿入し、係合部６８の孔６９及びシャフト５３の孔７０を貫通してナット（図示せず）で締結する。ここで、前記キャップ部材５４は、前記操作レバー５の円筒部６３の左右どちらの側にも装着可能である。そして、前記キャップ部材５４の化粧面６６には、操作レバー５の回転方向を示す矢印等を表示したり、また操作レバー５と色を変えて視覚的なバリエーションを持たせることができる。 The end portion of the shaft 53 is inserted into the square hole 64 of the operation lever 5, the cap member 54 is inserted into the outer portion of the cylindrical portion 63, and the engaging portion 68 is inserted into the center hole of the shaft 53. 67, and then a bolt 71 is inserted from the mounting hole 65 in the outer central portion of the cylindrical portion 63 of the operating lever 5, and passes through the hole 69 of the engaging portion 68 and the hole 70 of the shaft 53 to form a nut (not shown). ) Here, the cap member 54 can be mounted on either the left or right side of the cylindrical portion 63 of the operation lever 5. The decorative surface 66 of the cap member 54 can be displayed with an arrow or the like indicating the rotation direction of the operation lever 5, or can have a visual variation by changing the color of the operation lever 5.

前述のように、前記脚体１，１の上端間は、前記脚連結部材８，８を介して連結管９で連結し、一体化することにより強度を持たせている。しかし、前記脚体１の支持脚７の下部には足入れ空間を広くするために何ら連結ビームを設けてない。また、天板２の横幅が広いと、中央部が下方へ撓むことがあるが、そのため前記天板２と連結管９との間に保持部材７２を介在させて撓みを防止している。尚、前記保持部材７２を設ける位置は、中央部など任意でよく、また個数も天板２の横幅に応じて適数を設けるものとする。
As described above, the upper ends of the leg bodies 1 and 1 are connected by the connecting pipe 9 via the leg connecting members 8 and 8 and integrated to give strength. However, no connecting beam is provided below the support leg 7 of the leg 1 in order to widen the foot space. Further, if the width of the top plate 2 is wide, the central portion may be bent downward. For this reason, a holding member 72 is interposed between the top plate 2 and the connecting tube 9 to prevent the bending. In addition, the position where the holding member 72 is provided may be arbitrary, such as a central portion, and the appropriate number is provided according to the lateral width of the top plate 2.

本実施形態の折畳み式テーブルの水平姿勢における全体側面図である。It is a whole side view in the horizontal attitude | position of the foldable table of this embodiment. 折畳み式テーブルの起立姿勢におけるスタッキング状態の側面図である。It is a side view of the stacking state in the standing posture of a folding table. 機構部を示し、（ａ）は水平姿勢でロック状態の簡略側面図、（ｂ）は水平姿勢でロック解除状態の簡略側面図である。The mechanism part is shown, (a) is a simplified side view of the locked state in the horizontal posture, and (b) is a simplified side view of the unlocked state in the horizontal posture. 同じく機構部の拡大断面図である。It is an expanded sectional view of a mechanism part similarly. 機構部の一部破断して示した部分平面図である。It is the fragmentary top view which showed the mechanism part partially fractured | ruptured. 同じく機構部の一部破断して示した部分拡大平面図である。FIG. 5 is a partially enlarged plan view showing the mechanism part with a part broken away. ロック機構部の分解斜視図である。It is a disassembled perspective view of a lock mechanism part. ロック機構部の一部の拡大分解斜視図である。It is an expansion disassembled perspective view of a part of lock mechanism part. 回動機構部の分解斜視図である。It is a disassembled perspective view of a rotation mechanism part. 同じく組立状態の機構部の部分斜視図である。It is a fragmentary perspective view of the mechanism part of an assembly state similarly. 脚連結部材を示し、（ａ）は正面図、（ｂ）は側面図である。A leg connection member is shown, (a) is a front view, (b) is a side view. 脚連結部材と連結管を連結した状態の縦断面図である。It is a longitudinal cross-sectional view of the state which connected the leg connection member and the connection pipe. ブッシュを示し、（ａ）は正面図、（ｂ）は側面図、（ｃ）は断面図、（ｄ）は断面図である。A bush is shown, (a) is a front view, (b) is a side view, (c) is a sectional view, and (d) is a sectional view. 操作部材を示し、（ａ）は正面図、（ｂ）は側面図、（ｃ）は平面図、（ｄ）は断面図である。The operation member is shown, (a) is a front view, (b) is a side view, (c) is a plan view, and (d) is a cross-sectional view. 操作レバーをしめすし、（ａ）は正面図、（ｂ）は側面図、（ｃ）は平面図、（ｄ）は断面図である。The operation lever is shown, (a) is a front view, (b) is a side view, (c) is a plan view, and (d) is a sectional view. キャップ部材を示し、（ａ）は側面図、（ｂ）は正面図、（ｃ）は断面図である。A cap member is shown, (a) is a side view, (b) is a front view, (c) is sectional drawing. カバーを示す斜視図である。It is a perspective view which shows a cover. 天板の撓み防止構造を示し、（ａ）は縦断側面図、（ｂ）縦断正面図である。The top board bending prevention structure is shown, (a) is a longitudinal side view, (b) is a longitudinal front view. 二つ割り閉塞部材の例を示す分解斜視図である。It is a disassembled perspective view which shows the example of a two-part closure member. 同じく閉塞部材を示し、（ａ）は上部閉塞部材の正面図、（ｂ）は上部閉塞部材の側面図、（ｃ）は下部閉塞部材の正面図、（ｄ）は下部閉塞部材の側面図である。Similarly, the closing member is shown, (a) is a front view of the upper closing member, (b) is a side view of the upper closing member, (c) is a front view of the lower closing member, and (d) is a side view of the lower closing member. is there.

Explanation of symbols

１脚体、２天板、
３幕板、４機構部、
５操作レバー、６接地脚、
７支持脚、８脚連結部材、
９連結管、１０カバー、
１１ダクト、１２コンセントボックス、
１３上アーム、１４固定板、
１６天板固定金具、１７ロック金具、
１８操作部材、１９第１係合部、
２０第２係合部、２１支軸、
２２ロックピン、２３長孔、
２４係止部、２５弾性付勢手段（キックばね）、
２６ロック片、２７軸孔、
２８操作片、２９第１当止部、
３０第２当止部、３１軸受孔、
３２Ｕ字開口、３３切欠部、
３４摺動リング、３５閉塞部材、
３６連結部、３７水平部、
３８軸部、３９リング部、
４０スリット、４１閉塞部材、
４１Ａ上部閉塞部材、４１Ｂ下部閉塞部材、
４２嵌合部、４３突起、
４４貫通孔、４５螺孔、
４６嵌合孔、４７孔、
４８連結板、４９螺孔、
５０通孔、５１ボルト、
５２ブッシュ、５３シャフト、
５４キャップ部材、５５円孔、
５６スリーブ部、５７角孔、
５８角孔、５９押圧部、
６０スペーサ部、６１当止部、
６２レバー部、６３円筒部、
６３Ａ取付部、６４角孔、
６５取付孔、６６化粧面、
６７中心孔、６８係合部、
６９孔、７０孔、
７１ボルト、７２保持部材。 1 leg, 2 top plate,
3 curtains, 4 mechanical parts,
5 Operation lever, 6 Grounding leg,
7 support legs, 8 leg connecting members,
9 Connecting pipe, 10 Cover,
11 Duct, 12 Outlet box,
13 upper arm, 14 fixing plate,
16 Top plate fixing bracket, 17 Lock bracket,
18 operation member, 19 first engaging part,
20 second engaging portion, 21 support shaft,
22 lock pin, 23 long hole,
24 locking part, 25 elastic urging means (kick spring),
26 Lock piece, 27 Shaft hole,
28 operation pieces, 29 first stopper,
30 second stopper, 31 bearing hole,
32 U-shaped opening, 33 notch,
34 sliding ring, 35 closing member,
36 connecting parts, 37 horizontal parts,
38 shaft part, 39 ring part,
40 slits, 41 closing members,
41A Upper closing member, 41B Lower closing member,
42 fitting part, 43 protrusion,
44 through holes, 45 screw holes,
46 fitting holes, 47 holes,
48 connecting plate, 49 screw hole,
50 through holes, 51 bolts,
52 bush, 53 shaft,
54 cap member, 55 circular hole,
56 sleeve part, 57 square hole,
58 square holes, 59 pressing parts,
60 Spacer part, 61 Stop part,
62 lever part, 63 cylindrical part,
63A mounting part, 64 square hole,
65 mounting holes, 66 decorative face,
67 center hole, 68 engaging portion,
69 holes, 70 holes,
71 bolts, 72 holding members.

Claims

An upper arm attached to both sides of the lower surface of the top plate is connected to upper ends of the left and right legs so as to be vertically rotatable, and a top plate fixing bracket having a first engagement portion and a second engagement portion is connected to the leg body. An upper arm unit of a foldable table that is provided in a fixing portion associated with the upper arm and is disposed in the upper arm and fixes the top plate to a horizontal posture and an upright posture rotated upward. A lock fitting and an operation member for operating the lock fitting are provided between both side plates so as to be independently rotatable, and a first engagement portion or a second engagement portion of the top plate fixing bracket is provided at a distal end portion of the lock fitting. A lock pin that engages with the top plate fixing bracket, and the lock pin is biased by an elastic biasing means in a direction in which the lock pin engages with the top plate fixing bracket. It has a pressing part that drives in the unlocking direction and Arm unit on the folding table, characterized in that the non-rotatably mating square hole a shaft interlocking 構部 penetrated formation.

A bush formed with a square hole into which the shaft is inserted from the inside to the center of both side plates is rotatably fitted in the circular holes formed on the both side plates of the upper arm, and the operation is performed on the inner ends of both bushes. 2. The upper arm unit of a folding table according to claim 1, wherein both ends of the member are fitted and fitted so that the square holes of the operation member and the square holes of both bushes communicate with each other.

The lock fitting has a pair of parallel lock pieces, the operation pieces are formed on the base end sides of the lock pieces, and the center of the pressing portion of the operation member is engaged between the operation pieces. The upper arm unit of the foldable table according to claim 1 or 2, wherein a spacer portion for positioning the lock fitting is protruded.