JP2014028083A

JP2014028083A - Sewing machine

Info

Publication number: JP2014028083A
Application number: JP2012170561A
Authority: JP
Inventors: Makoto Mori; 誠森; Yoshito Kawashima; 義人川嶋
Original assignee: Brother Industries Ltd
Current assignee: Brother Industries Ltd
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2014-02-13
Anticipated expiration: 2032-07-31
Also published as: CN103572517B; CN103572517A; JP5942676B2

Abstract

PROBLEM TO BE SOLVED: To provide a sewing machine which properly prohibits each type of drive mechanisms from driving when a sewing machine body is tilted.SOLUTION: A sewing machine body includes a control substrate 50. The control substrate 50 is mounted with a sensor 41. The sensor 41 includes a swing part 60, a pivotally supporting part 65 and photointerruptors 70 and 80. When the sewing machine body is in an upright state, the photointerruptor 70 detects a frist extention part 61 of the swing part 60, and the photointerruptor 80 does not detect a second extension part 62 of the swing part 60. When the sewing machine body is in a tilted state, the photointerruptor 80 detects the second extension part 62 and the photointerruptor 70 does not detect the first extension part 61. A CPU of the sewing machine allows the drive of a main shaft motor only when the photointerruptor 70 detects the first extension part 61 and the photointerruptor 80 does not detect the second extension part 62; thereby, the main shaft motor can be properly prohibited from driving when the sewing machine body is tilted.

Description

本発明は、ミシン本体がミシンテーブルに対して傾倒していることを検出するミシンに関する。 The present invention relates to a sewing machine that detects that a sewing machine body is tilted with respect to a sewing machine table.

ミシンテーブルに対してミシン本体を傾倒することで、ミシンの保守を行うことが可能なミシンがある。特許文献１は、ミシン本体に傾斜センサを備えたミシンを開示する。該傾斜センサは、ミシン本体が直立した状態でスチールボールがホール素子に近接し、ミシン本体が傾倒した状態でスチールボールがホール素子から離れる。故にミシンは、ホール素子からの出力信号を監視することで、ミシン本体が傾倒していることを検出できる。ミシンは、ミシン本体が直立した状態で各種駆動機構の駆動を許可し、ミシン本体が傾倒した状態で各種駆動機構の駆動を禁止する。 There is a sewing machine that can perform maintenance of the sewing machine by tilting the sewing machine body with respect to the sewing machine table. Patent Document 1 discloses a sewing machine having a tilt sensor in a sewing machine body. In the tilt sensor, the steel ball is close to the hall element when the sewing machine body is upright, and the steel ball is separated from the hall element when the sewing machine body is tilted. Therefore, the sewing machine can detect that the sewing machine body is tilted by monitoring the output signal from the hall element. The sewing machine permits driving of various drive mechanisms with the sewing machine main body standing upright, and prohibits driving of the various drive mechanisms with the sewing machine main body tilted.

特開２００４−１１３６９０号公報JP 2004-113690 A

ホール素子が故障した場合、ミシンは、ミシン本体が傾倒しているにも関わらず、各種駆動機構の駆動を許可する場合がある。故に、ミシンは、ミシンの保守中に各種駆動機構の駆動指示があった時に各種駆動機構が駆動する場合があるという問題点がある。 When the hall element breaks down, the sewing machine may permit driving of various driving mechanisms even though the sewing machine body is tilted. Therefore, the sewing machine has a problem in that various drive mechanisms may be driven when an instruction to drive the various drive mechanisms is given during maintenance of the sewing machine.

本発明の目的は、ミシン本体が傾倒している場合に各種駆動機構が駆動することを適切に禁止するミシンを提供することである。 An object of the present invention is to provide a sewing machine that appropriately prohibits driving of various drive mechanisms when the sewing machine body is tilted.

本発明のミシンは、ミシン本体と、前記ミシン本体を傾倒可能に支持するミシンテーブルと、前記ミシン本体内部に設けられ、前記ミシンテーブルに対して前記ミシン本体が直立した状態と、前記ミシン本体が傾倒した状態とを検出するためのセンサと、前記センサを介して、前記ミシン本体が傾倒した状態であることを検出した場合、主軸を回転する主軸モータの駆動を禁止する制御部とを備えたミシンにおいて、前記センサは、前記ミシンテーブルに対する前記ミシン本体の角度の変化に応じて状態が変化するセンサ本体と、前記ミシン本体が直立した状態で前記センサ本体を検出し、前記ミシン本体が傾倒した状態で前記センサ本体を検出しない第一検出機構と、前記ミシン本体が傾倒した状態で前記センサ本体を検出し、前記ミシン本体が直立した状態で前記センサ本体を検出しない第二検出機構とを備え、前記制御部は、前記第一検出機構が前記センサ本体を検出し、且つ前記第二検出機構が前記センサ本体を検出しない場合にのみ、前記主軸モータの駆動を許可する。 The sewing machine of the present invention includes a sewing machine main body, a sewing machine table that supports the sewing machine main body so as to be tiltable, a state in which the sewing machine main body is provided upright with respect to the sewing machine table, A sensor for detecting a tilted state, and a control unit that prohibits driving of a spindle motor that rotates the spindle when it is detected that the sewing machine main body is tilted via the sensor. In the sewing machine, the sensor detects a sensor main body whose state changes in accordance with a change in an angle of the sewing machine main body with respect to the sewing machine table, the sensor main body in an upright state, and the sewing machine main body tilts. A first detection mechanism that does not detect the sensor body in a state; and the sensor body is detected in a state in which the sewing machine body is tilted; A second detection mechanism that does not detect the sensor body when the body is upright, and the control unit detects the sensor body, and the second detection mechanism detects the sensor body. Only when not, the drive of the spindle motor is permitted.

本発明のミシンは、検出機構を二つ設けることで、一方の検出機構が故障した場合でも、他方の検出機構がセンサ本体の状態を検出できるので、ミシン本体が直立した状態であるか又は傾倒した状態であるかを検出できる。ミシンは、ミシン本体が直立した状態の場合のみ主軸モータの駆動を許可するので、ミシン本体が傾斜している状態で主軸モータが駆動することを適切に禁止できる。 In the sewing machine of the present invention, by providing two detection mechanisms, even if one of the detection mechanisms fails, the other detection mechanism can detect the state of the sensor body, so that the sewing machine body is in an upright state or tilted. It is possible to detect whether or not Since the sewing machine permits the driving of the main shaft motor only when the sewing machine main body is in an upright state, the main shaft motor can be appropriately prohibited from being driven while the sewing machine main body is inclined.

本発明のミシンでは、前記制御部は、前記第二検出機構が前記センサ本体を検出するか、又は前記第一検出機構が前記センサ本体を検出しない場合に前記主軸モータの駆動を禁止してもよい。ミシンは、第二検出機構がセンサ本体を検出するか、又は第一検出機構がセンサ本体を検出しない場合、即ちミシン本体が直立した状態以外で主軸モータが駆動することを禁止する。故にミシンは、ミシン本体が傾倒している状態で主軸モータが駆動することを確実に禁止できる。 In the sewing machine according to the aspect of the invention, the controller may prevent the spindle motor from being driven when the second detection mechanism detects the sensor body or when the first detection mechanism does not detect the sensor body. Good. The sewing machine prohibits the spindle motor from being driven except when the second detection mechanism detects the sensor main body or when the first detection mechanism does not detect the sensor main body, that is, when the sewing machine main body is upright. Therefore, the sewing machine can surely prohibit the spindle motor from being driven while the sewing machine body is tilted.

本発明のミシンでは、前記センサ本体は、前記ミシンテーブルに対する前記ミシン本体の角度の変化に応じて揺動する部材であって、揺動中心から夫々異なる方向に延びる第一延設部及び第二延設部を有する揺動部を備え、前記第一検出機構は、前記ミシン本体が直立した状態で前記第一延設部を検出し、前記ミシン本体が傾倒した状態で前記第一延設部を検出せず、前記第二検出機構は、前記ミシン本体が傾倒した状態で前記第二延設部を検出し、前記ミシン本体が直立した状態で前記第二延設部を検出しなくてもよい。センサ本体が揺動部を備えることで、揺動部はミシン本体の角度の変化に応じて状態を容易に変化することができる。揺動部が第一延設部と第二延設部を備えることで、第一延設部と第二延設部の成す角度を調節できる。故にミシンは、該角度を調節することで、ミシンテーブルに対してミシン本体が特定の角度に傾倒した場合にミシン本体の傾倒状態を検出できる。 In the sewing machine of the present invention, the sensor main body is a member that swings according to a change in the angle of the sewing machine main body with respect to the sewing machine table, and includes a first extending portion and a second extending portion that extend in different directions from the swing center. The first detection mechanism detects the first extension part in a state where the sewing machine body is upright, and the first extension part is in a state where the sewing machine body is tilted. The second detection mechanism detects the second extension portion with the sewing machine body tilted, and does not detect the second extension portion with the sewing machine body standing upright. Good. Since the sensor body includes the swinging portion, the swinging portion can easily change its state in accordance with a change in the angle of the sewing machine body. Since the swinging portion includes the first extending portion and the second extending portion, the angle formed by the first extending portion and the second extending portion can be adjusted. Therefore, the sewing machine can detect the tilted state of the sewing machine body when the sewing machine body is tilted at a specific angle with respect to the sewing machine table by adjusting the angle.

本発明のミシンは、前記ミシン本体が直立した状態又は傾倒した状態で、前記揺動部の重心が前記揺動中心よりも下側に配置してもよい。揺動中心の下側に重心を配置することで、揺動部はミシン本体が振動した場合でも揺動し難くなる。故にミシンは、ミシン本体が振動した場合に、ミシン本体の状態を誤って判断することを抑止できる。 The sewing machine of the present invention may be arranged such that the center of gravity of the oscillating portion is below the oscillating center in a state where the sewing machine main body is upright or tilted. By disposing the center of gravity below the swing center, the swing portion is less likely to swing even when the sewing machine body vibrates. Therefore, the sewing machine can prevent erroneous determination of the state of the sewing machine body when the sewing machine body vibrates.

本発明のミシンは、前記第一検出機構と前記第二検出機構を結ぶ線分上に前記揺動中心を配置してもよい。ミシンは、揺動部、第一検出機構、及び第二検出機構を同一平面上に配置できる為、基板表面にセンサを容易に配置できる。 In the sewing machine of the present invention, the swing center may be arranged on a line segment connecting the first detection mechanism and the second detection mechanism. Since the sewing machine can arrange the swinging part, the first detection mechanism, and the second detection mechanism on the same plane, the sensor can be easily arranged on the substrate surface.

本発明のミシンは、前記ミシン本体が直立した状態で前記ミシンテーブルの上面と略直交する基板を備え、前記基板は、前記ミシン本体が直立した状態で、前記第一検出機構及び前記第二検出機構が略鉛直方向に並ぶよう配置してもよい。ミシン本体が直立した状態で、検出機構に溜まった埃は下方に落ち易くなり、検出機構に埃が溜まり難くなる。故にミシンは、検出機構が埃を検出することでミシン本体の状態を誤って判断することを抑止できる。 The sewing machine of the present invention includes a substrate that is substantially orthogonal to the upper surface of the sewing machine table in a state in which the sewing machine main body is upright, and the substrate is in the state in which the sewing machine main body is upright, the first detection mechanism and the second detection mechanism. You may arrange | position so that a mechanism may be located in a substantially vertical direction. When the sewing machine main body is in an upright state, the dust accumulated in the detection mechanism is likely to fall downward, and the dust is difficult to accumulate in the detection mechanism. Therefore, the sewing machine can prevent the detection mechanism from erroneously determining the state of the sewing machine body by detecting dust.

本発明のミシンでは、前記ミシン本体は、前記ミシンテーブルに支持されるベッド部と、前記ベッド部の一端部から前記ミシン本体が直立した状態で上方に立設する脚柱部と、前記脚柱部から前記ベッド部の他端部側に延びるアーム部とを備え、前記アーム部は、前記ベッド部の他端部側端部に上下動する針棒を備え、前記センサは、前記脚柱部に配置してもよい。脚柱部にセンサを設けることで、ミシン本体のアーム部に設けた針棒が駆動することで生じる振動が、センサに伝わり難くなる。故にミシンは、針棒が駆動することで生じる振動でセンサがミシン本体の状態を誤って判断することを抑止できる。 In the sewing machine according to the present invention, the sewing machine main body includes a bed portion supported by the sewing machine table, a pedestal column portion erected upward in a state where the sewing machine main body stands upright from one end portion of the bed portion, and the pedestal column An arm portion extending from the bed portion to the other end portion side of the bed portion, the arm portion including a needle bar that moves up and down at the other end portion side end portion of the bed portion, and the sensor includes the pedestal portion. You may arrange in. By providing the sensor on the pedestal, vibration generated by driving the needle bar provided on the arm portion of the sewing machine main body is difficult to be transmitted to the sensor. Therefore, the sewing machine can prevent the sensor from erroneously determining the state of the sewing machine main body due to vibration generated by driving the needle bar.

本発明のミシンでは、前記第一検出機構および前記第二検出機構は、フォトインタラプタであってもよい。フォトインタラプタを使用することで、第一検出機構と第二検出機構に機械的なストレスが加わらず、ミシン本体を繰り返し傾倒しても検出部は故障し難くなる。 In the sewing machine of the present invention, the first detection mechanism and the second detection mechanism may be photo interrupters. By using the photo interrupter, mechanical stress is not applied to the first detection mechanism and the second detection mechanism, and even if the sewing machine body is tilted repeatedly, the detection unit is less likely to fail.

ミシン１の斜視図。The perspective view of the sewing machine 1. FIG. 直立状態のミシン本体１０の右側面図。The right view of the sewing machine main body 10 of an upright state. 傾倒状態のミシン本体１０の右側面図。The right side view of the sewing machine body 10 in a tilted state. 直立状態のミシン本体１０が備える制御基板５０の斜視図。The perspective view of the control board 50 with which the sewing machine main body 10 of an upright state is provided. 直立状態のミシン本体１０が備えるセンサ４１の右側面図。The right view of the sensor 41 with which the sewing machine main body 10 of an upright state is provided. 傾倒状態のミシン本体１０が備える制御基板５０の斜視図。The perspective view of the control board 50 with which the sewing machine main body 10 in the tilted state is provided. 傾倒状態のミシン本体１０が備えるセンサ４１の右側面図。The right view of the sensor 41 with which the sewing machine main body 10 of the tilting state is provided. 揺動部６０の斜視図。The perspective view of the rocking | swiveling part 60. FIG. 揺動部６０の右側面図。The right view of the rocking | swiveling part 60. FIG. 軸支部６５の斜視図。The perspective view of the axial support part 65. FIG. 軸支部６５の右側面図。The right view of the axial support part 65. FIG. フォトインタラプタ７０、８０の斜視図。The perspective view of the photo interrupters 70 and 80. FIG. ミシン１の電気的構成を示すブロック図。FIG. 2 is a block diagram showing an electrical configuration of the sewing machine 1. メイン処理のフローチャート。The flowchart of a main process.

以下、本発明の一実施形態について図面を参照して説明する。図１〜図３を参照しミシン１の構成について説明する。図１の上側、下側、右側、左側、表側、裏側は夫々ミシン１の上側、下側、右側、左側、前側、後側である。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The configuration of the sewing machine 1 will be described with reference to FIGS. The upper side, lower side, right side, left side, front side, and back side of FIG. 1 are the upper side, lower side, right side, left side, front side, and rear side of the sewing machine 1, respectively.

ミシン１はミシン本体１０とミシンテーブル２０を備える。ミシン本体１０はベッド部２、脚柱部３、アーム部４を備える。ベッド部２はミシン本体１０の土台となる。ベッド部２はミシンテーブル２０上面の矩形穴２０１に上方から装着する。脚柱部３はベッド部２右端から鉛直上方に延びる。アーム部４は脚柱部３上端から左方に延びる。アーム部４はベッド部２上面に対向する。アーム部４は左端部下方に押え足１７を備える。押え足１７はベッド部２上面に設けた針板１５と対向する。アーム部４は内部に針棒７を保持する。針棒７は下端に縫針８を装着する。針棒７と縫針８は主軸１４の回転に従って上下に往復移動する。縫針８の下端は下降時に針板１５の針穴（図示略）を通過する。主軸１４は脚柱部３とアーム部４内を左右方向に延びる。アーム部４は左端部前方に天秤９を備える。天秤９は針棒７に連動して上下動する。 The sewing machine 1 includes a sewing machine body 10 and a sewing machine table 20. The sewing machine body 10 includes a bed portion 2, a pedestal column portion 3, and an arm portion 4. The bed portion 2 serves as a base for the sewing machine body 10. The bed portion 2 is mounted from above on a rectangular hole 201 on the upper surface of the sewing machine table 20. The pedestal 3 extends vertically upward from the right end of the bed 2. The arm portion 4 extends leftward from the upper end of the pedestal column portion 3. The arm part 4 faces the upper surface of the bed part 2. The arm portion 4 includes a presser foot 17 below the left end portion. The presser foot 17 faces the needle plate 15 provided on the upper surface of the bed portion 2. The arm portion 4 holds a needle bar 7 therein. The needle bar 7 has a sewing needle 8 attached to the lower end. The needle bar 7 and the sewing needle 8 reciprocate up and down as the main shaft 14 rotates. The lower end of the sewing needle 8 passes through a needle hole (not shown) of the needle plate 15 when lowered. The main shaft 14 extends in the left-right direction within the pillar portion 3 and the arm portion 4. The arm portion 4 includes a balance 9 in front of the left end portion. The balance 9 moves up and down in conjunction with the needle bar 7.

ミシン本体１０はベッド部２下方に制御装置４０を備える。制御装置４０はロッド２１を介して踏み込み式のペダル２２に接続する。作業者はペダル２２をつま先側又は踵側に操作する。制御装置４０はペダル２２の操作方向と操作量に応じてミシン本体１０の動作を制御する。 The sewing machine body 10 includes a control device 40 below the bed unit 2. The control device 40 is connected to the stepping pedal 22 via the rod 21. The operator operates the pedal 22 to the toe side or the heel side. The control device 40 controls the operation of the sewing machine body 10 according to the operation direction and the operation amount of the pedal 22.

脚柱部３は前面上部に操作部１１を備える。操作部１１の前面は、脚柱部３に対して僅かに傾斜し、前方斜め上側を向く（図２参照）。操作部１１はパネル表示部１１１と操作キー１１２を備える。パネル表示部１１１は各種情報を表示する。作業者はパネル表示部１１１を見ながら操作キー１１２を操作し各種指示をミシン１に入力する。操作部１１は後側に制御基板５０（図４、図６参照）を備える。制御基板５０は操作部１１の前面と平行に設ける。制御基板５０は、パネル表示部１１１の表示制御を行うデバイスと操作キー１１２の入力制御を行うデバイスを実装する。 The pedestal 3 is provided with an operation unit 11 in the upper front portion. The front surface of the operation unit 11 is slightly inclined with respect to the pedestal column unit 3 and faces forward and obliquely upward (see FIG. 2). The operation unit 11 includes a panel display unit 111 and operation keys 112. The panel display unit 111 displays various information. The operator operates the operation keys 112 while looking at the panel display unit 111 to input various instructions to the sewing machine 1. The operation unit 11 includes a control board 50 (see FIGS. 4 and 6) on the rear side. The control board 50 is provided in parallel with the front surface of the operation unit 11. The control board 50 mounts a device that performs display control of the panel display unit 111 and a device that performs input control of the operation keys 112.

なお、制御基板５０を設ける位置および角度は変更できる。例えば制御基板５０は、脚柱部３の前面下部に設けてもよいし、脚柱部３の後面側に設けてもよい。制御基板５０はミシンテーブル２０の上面に対して鉛直に設けてもよい。 The position and angle at which the control board 50 is provided can be changed. For example, the control board 50 may be provided in the lower part of the front surface of the pedestal column 3 or may be provided on the rear surface side of the pedestal column 3. The control board 50 may be provided perpendicular to the upper surface of the sewing machine table 20.

脚柱部３は右側面にモータカバー１９を装着する。モータカバー１９は主軸モータ３０を覆う。主軸モータ３０は主軸１４の右端部に設ける。主軸モータ３０の出力軸（図示略）左端は主軸１４の右端部と接続する。主軸モータ３０が駆動すると主軸１４は回転する。主軸モータ３０の出力軸（図示略）右端はプーリー１３と接続する。モータカバー１９は右側面に円形の開口部（図示略）を有する。プーリー１３は該開口部から右方へ突出する。作業者がプーリー１３を手動で回転することで主軸１４は回転する。 The pedestal 3 is fitted with a motor cover 19 on the right side. The motor cover 19 covers the spindle motor 30. The spindle motor 30 is provided at the right end of the spindle 14. The left end of the output shaft (not shown) of the main shaft motor 30 is connected to the right end portion of the main shaft 14. When the main shaft motor 30 is driven, the main shaft 14 rotates. The right end of the output shaft (not shown) of the spindle motor 30 is connected to the pulley 13. The motor cover 19 has a circular opening (not shown) on the right side. The pulley 13 protrudes rightward from the opening. The main shaft 14 rotates when the operator manually rotates the pulley 13.

図２、図３を参照しミシン本体１０の直立状態（図２参照）と傾倒状態（図３参照）について説明する。 The upright state (see FIG. 2) and the tilted state (see FIG. 3) of the sewing machine body 10 will be described with reference to FIGS.

ベッド部２の後部と、矩形穴２０１の後部とは、ヒンジ機構２７を介して連結してある。ヒンジ機構２７は水平軸２７１と回動部材２７２とを備える。ミシンテーブル２０には、矩形穴２０１に面した穴２０２が設けてある。水平軸２７１は、穴２０２内で左右方向に設けてある。水平軸２７１はベッド部２の後端部側でアーム部４と平行に設けてある。ミシンテーブル２０は水平軸２７１の左右方向の端部を支持する。回動部材２７２の一端は、水平軸２７１の周囲に沿って曲がっている。回動部材２７２は水平軸２７１の周囲を回動可能である。回動部材２７２の他端は、ベッド部２の後部と連結してある。故に、ミシン本体１０は、直立状態（図２参照）と、傾倒状態（図３参照）との間で、水平軸２７１を中心に回動可能である。図２に示すように、ミシン本体１０が直立状態の場合、ベッド部２の上面とミシンテーブル２０の上面とが同一の高さ位置になる。ミシンテーブル２０の上面は、ミシン本体１０の後方に角柱２０３を立設する。図３に示すように、角柱２０３は、傾倒状態のミシン本体１０を支持する。傾倒状態のミシン本体１０の脚柱部３の延びる方向とミシンテーブル２０の上面との間の角度のうち小さい角度は約４０度である。作業者は、ミシン本体１０を傾倒状態にして保守作業を行う。 The rear part of the bed part 2 and the rear part of the rectangular hole 201 are connected via a hinge mechanism 27. The hinge mechanism 27 includes a horizontal shaft 271 and a rotating member 272. The sewing machine table 20 is provided with a hole 202 facing the rectangular hole 201. The horizontal shaft 271 is provided in the left-right direction within the hole 202. The horizontal shaft 271 is provided in parallel with the arm portion 4 on the rear end side of the bed portion 2. The sewing machine table 20 supports the end of the horizontal shaft 271 in the left-right direction. One end of the rotating member 272 is bent along the periphery of the horizontal shaft 271. The rotating member 272 can rotate around the horizontal shaft 271. The other end of the rotating member 272 is connected to the rear part of the bed part 2. Therefore, the sewing machine main body 10 can rotate around the horizontal shaft 271 between the upright state (see FIG. 2) and the tilted state (see FIG. 3). As shown in FIG. 2, when the sewing machine body 10 is in an upright state, the upper surface of the bed portion 2 and the upper surface of the sewing machine table 20 are at the same height position. On the upper surface of the sewing machine table 20, a prism 203 is erected on the rear side of the sewing machine body 10. As shown in FIG. 3, the prism 203 supports the sewing machine body 10 in a tilted state. Of the angles between the extending direction of the pedestal 3 of the sewing machine body 10 in the tilted state and the upper surface of the sewing machine table 20, the smaller angle is about 40 degrees. The operator performs maintenance work with the sewing machine body 10 tilted.

尚、傾倒状態のミシン本体１０の脚柱部３の延びる方向とミシンテーブル２０の上面との間の角度は変更できる。該角度のうち小さい角度は、ミシン本体１０を傾倒状態とした場合にミシン本体１０とミシンテーブル２０とが接触しない角度、且つ作業者がミシン本体１０の保守作業を行える角度であればよい。 It should be noted that the angle between the extending direction of the leg 3 of the sewing machine body 10 in the tilted state and the upper surface of the sewing machine table 20 can be changed. The smaller angle among the angles may be an angle at which the sewing machine body 10 and the sewing machine table 20 do not come into contact with each other when the sewing machine body 10 is tilted, and an angle at which an operator can perform maintenance work on the sewing machine body 10.

図４から図１２を参照しセンサ４１について説明する。図５の上側、下側、右側、左側は夫々制御基板５０、センサ４１の上側、下側、後側、前側である。図４、図６に示すように、センサ４１は制御基板５０の後面に設けてある。制御装置４０（図１参照）に設けたＣＰＵ４４（図１３参照）は、センサ４１の検出状態によって、ミシン本体１０が直立状態（図２参照）であるか又は傾倒状態（図３参照）であるかを特定する。センサ４１は揺動部６０（図８、図９参照）、軸支部６５（図１０、図１１参照）、フォトインタラプタ７０、８０（図１２参照）を備える。 The sensor 41 will be described with reference to FIGS. The upper side, lower side, right side, and left side in FIG. 5 are the upper side, lower side, rear side, and front side of the control board 50 and sensor 41, respectively. As shown in FIGS. 4 and 6, the sensor 41 is provided on the rear surface of the control board 50. The CPU 44 (see FIG. 13) provided in the control device 40 (see FIG. 1) is either in an upright state (see FIG. 2) or tilted (see FIG. 3) depending on the detection state of the sensor 41. To identify. The sensor 41 includes a swing part 60 (see FIGS. 8 and 9), a shaft support part 65 (see FIGS. 10 and 11), and photo interrupters 70 and 80 (see FIG. 12).

図８、図９を参照し揺動部６０について説明する。揺動部６０は第一延設部６１、第二延設部６２、軸部６３を備える。図８に示すように、第一延設部６１と第二延設部６２の形状は板状である。第一延設部６１と第二延設部６２は同一平面上に延びる。軸部６３の形状は円柱形である。軸部６３は、第一延設部６１と第二延設部６２の延びる平面に対して両側に鉛直方向に延びる。第一延設部６１と第二延設部６２は、軸部６３から夫々異なる方向に延びる。 The swing part 60 will be described with reference to FIGS. The swinging part 60 includes a first extending part 61, a second extending part 62, and a shaft part 63. As shown in FIG. 8, the shape of the 1st extension part 61 and the 2nd extension part 62 is plate shape. The first extending portion 61 and the second extending portion 62 extend on the same plane. The shape of the shaft portion 63 is a cylindrical shape. The shaft portion 63 extends in the vertical direction on both sides with respect to the plane in which the first extending portion 61 and the second extending portion 62 extend. The first extending portion 61 and the second extending portion 62 extend from the shaft portion 63 in different directions.

図９に示すように、第一延設部６１を軸部６３の軸方向から見た形状は略扇形である。第一延設部６１は、端部６１１、６１２、６１３を備える。端部６１３は、略扇形の円弧を構成する。端部６１１、６１２は、端部６１３の両端に接続する。軸部６３は、端部６１１、６１２の夫々に沿って延びる直線６１４、６１５が交差する部分の近傍に配置する。直線６１４、６１５が成す角度Ｐは約６５度である。即ち、第一延設部６１の略扇形の中心の角度は約６５度である。 As shown in FIG. 9, the shape of the first extending portion 61 viewed from the axial direction of the shaft portion 63 is a substantially fan shape. The first extending portion 61 includes end portions 611, 612, and 613. The end 613 constitutes a substantially fan-shaped arc. The end portions 611 and 612 are connected to both ends of the end portion 613. The shaft portion 63 is disposed in the vicinity of the portion where the straight lines 614 and 615 extending along the end portions 611 and 612 intersect. The angle P formed by the straight lines 614 and 615 is about 65 degrees. That is, the angle of the substantially fan-shaped center of the first extending portion 61 is about 65 degrees.

第二延設部６２を軸部６３の軸方向から見た形状は略長方形である。軸部６３は、略長方形状の長手方向の一端側の近傍に配置する。第二延設部６２は、端部６２１、６２２、６２３を備える。端部６２１、６２２は、略長方形状の短手方向の端部である。端部６２３は、略長方形状の長手方向の端部のうち、軸部６３を配置する側と反対側の端部である。 The shape of the second extending portion 62 viewed from the axial direction of the shaft portion 63 is substantially rectangular. The shaft portion 63 is disposed in the vicinity of one end side in the longitudinal direction of a substantially rectangular shape. The second extending portion 62 includes end portions 621, 622, and 623. The end portions 621 and 622 are substantially rectangular end portions in the short direction. The end portion 623 is an end portion on the opposite side to the side on which the shaft portion 63 is disposed, of the end portions in the longitudinal direction of the substantially rectangular shape.

第一延設部６１の端部６１１、６１２は、夫々、第二延設部６２の端部６２１、６２２と接続する。軸部６３は、端部６１１、６２１の接続部分の近傍に配置する。端部６１１、６２１の成す角度Ｑは約１３０度である。軸部６３から端部６１３までの間の長さと、軸部６３から端部６２３までの間の長さとは略同一である。揺動部６０の重心６４は、第一延設部６１の略中央に配置する。 The end portions 611 and 612 of the first extending portion 61 are connected to the end portions 621 and 622 of the second extending portion 62, respectively. The shaft portion 63 is disposed in the vicinity of the connection portion between the end portions 611 and 621. An angle Q formed by the ends 611 and 621 is about 130 degrees. The length from the shaft portion 63 to the end portion 613 and the length from the shaft portion 63 to the end portion 623 are substantially the same. The center of gravity 64 of the oscillating portion 60 is disposed substantially at the center of the first extending portion 61.

尚、第一延設部６１の形状は変更できる。第一延設部６１を軸部６３の軸方向から見た形状は、略三角形又は略長方形であってもよい。略三角形又は略長方形の一の頂点に軸部６３を設けてもよい。第一延設部６１の略扇形の中心の角度は６５度に限定されない。第二延設部６２の形状は変更できる。第二延設部６２を軸部６３の軸方向から見た場合の形状は、略扇形又は略三角形であってもよい。端部６１１、６２１の成す角度Ｑは１３０度に限定されない。 In addition, the shape of the 1st extension part 61 can be changed. The shape of the first extending portion 61 viewed from the axial direction of the shaft portion 63 may be a substantially triangular shape or a substantially rectangular shape. You may provide the axial part 63 in one vertex of a substantially triangle or a substantially rectangle. The angle of the substantially fan-shaped center of the first extending portion 61 is not limited to 65 degrees. The shape of the second extending portion 62 can be changed. The shape when the second extending portion 62 is viewed from the axial direction of the shaft portion 63 may be a substantially fan shape or a substantially triangular shape. The angle Q formed by the end portions 611 and 621 is not limited to 130 degrees.

図１０、図１１を参照し軸支部６５について説明する。軸支部６５は軸受部６６、６７、台座部６８、接続端子６９を備える。台座部６８は、略長円形の板状である。軸受部６６、６７は、台座部６８の一方の面側に設ける。接続端子６９は、台座部６８の他方の面側に設ける。 The shaft support 65 will be described with reference to FIGS. 10 and 11. The shaft support portion 65 includes bearing portions 66 and 67, a pedestal portion 68, and a connection terminal 69. The pedestal portion 68 has a substantially oval plate shape. The bearing portions 66 and 67 are provided on one surface side of the pedestal portion 68. The connection terminal 69 is provided on the other surface side of the pedestal portion 68.

軸受部６６、６７は、台座部６８の長手方向に並んで間隔をあけて配置する。軸受部６６は、第一軸受部６６１、第二軸受部６６２、第三軸受部６６３を備える。第一軸受部６６１は、台座部６８の一方の面から鉛直方向に延びる。第二軸受部６６２は、第一軸受部６６１の端部のうち台座部６８に接続する側と反対側の端部から、台座部６８に対して平行に延び、台座部６８の一方の面と対向する。第三軸受部６６３は、第二軸受部６６２のうち第一軸受部６６１に接続する側と反対側の端部から、台座部６８側に向けて延びる。第三軸受部６６３のうち第二軸受部６６２に接続する側と反対側の端部は、台座部６８との間に間隙を形成する。軸受部６７は、第一軸受部６７１、第二軸受部６７２、第三軸受部６７３を備える。第一軸受部６７１、第二軸受部６７２、第三軸受部６７３は、第一軸受部６６１、第二軸受部６６２、第三軸受部６６３と夫々同一形状である。軸受部６６、６７は、揺動部６０（図８参照）の軸部６３の両端部を夫々回転可能に支持する。 The bearing portions 66 and 67 are arranged in the longitudinal direction of the pedestal portion 68 with a space therebetween. The bearing portion 66 includes a first bearing portion 661, a second bearing portion 662, and a third bearing portion 663. The first bearing portion 661 extends in the vertical direction from one surface of the pedestal portion 68. The second bearing portion 662 extends in parallel to the pedestal portion 68 from the end portion of the first bearing portion 661 opposite to the side connected to the pedestal portion 68, and has one surface of the pedestal portion 68. opposite. The third bearing portion 663 extends from the end of the second bearing portion 662 opposite to the side connected to the first bearing portion 661 toward the pedestal portion 68 side. An end of the third bearing portion 663 opposite to the side connected to the second bearing portion 662 forms a gap with the pedestal portion 68. The bearing portion 67 includes a first bearing portion 671, a second bearing portion 672, and a third bearing portion 673. The first bearing portion 671, the second bearing portion 672, and the third bearing portion 673 have the same shape as the first bearing portion 661, the second bearing portion 662, and the third bearing portion 663, respectively. The bearing portions 66 and 67 rotatably support both end portions of the shaft portion 63 of the swinging portion 60 (see FIG. 8).

接続端子６９は接続端子６９１、６９２を備える。接続端子６９１、６９２は、台座部６８の長手方向に並んで間隔をあけて配置する。接続端子６９は、制御基板５０に設けた穴（図示外）に挿通する。接続端子６９１、６９２の夫々の先端に設けたストッパ６９３は、軸支部６５を制御基板５０に固定する。接続端子６９が制御基板５０の穴に挿通した状態で、台座部６８の他方の面は制御基板５０に接触する。 The connection terminal 69 includes connection terminals 691 and 692. The connection terminals 691 and 692 are arranged side by side in the longitudinal direction of the pedestal portion 68. The connection terminal 69 is inserted into a hole (not shown) provided in the control board 50. A stopper 693 provided at the tip of each of the connection terminals 691 and 692 fixes the shaft support portion 65 to the control board 50. In a state where the connection terminal 69 is inserted into the hole of the control board 50, the other surface of the pedestal portion 68 contacts the control board 50.

図１２を参照しフォトインタラプタ７０、８０について説明する。フォトインタラプタ７０、８０は同一形状である為、フォトインタラプタ８０の説明は省略する。フォトインタラプタ７０は、立設部７０１、７０２、台座部７０３を備える。台座部７０３の形状は、略長方形の板状である。立設部７０１、７０２は、夫々、台座部７０３の長手方向の両端から鉛直方向に延びる。立設部７０１は、立設部７０２と対向する面に発光部７１を備える。立設部７０２は、立設部７０１と対向する面に受光部７２を備える。立設部７０１、７０２間に遮蔽物がない場合、発光部７１が発光した光を受光部７２が受光する。立設部７０１、７０２間に遮蔽物がある場合、発光部７１が発光した光を受光部７２は受光しない。故にフォトインタラプタ７０は、立設部７０１、７０２間に遮蔽物があるか否かを検出できる。フォトインタラプタ８０は、立設部８０１、８０２、台座部８０３、発光部８１、受光部８２を備える。 The photo interrupters 70 and 80 will be described with reference to FIG. Since the photo interrupters 70 and 80 have the same shape, the description of the photo interrupter 80 is omitted. The photo interrupter 70 includes standing portions 701 and 702 and a pedestal portion 703. The shape of the base part 703 is a substantially rectangular plate shape. The standing portions 701 and 702 respectively extend in the vertical direction from both ends in the longitudinal direction of the pedestal portion 703. The standing portion 701 includes a light emitting portion 71 on a surface facing the standing portion 702. The standing portion 702 includes a light receiving portion 72 on a surface facing the standing portion 701. When there is no shield between the standing portions 701 and 702, the light receiving portion 72 receives the light emitted from the light emitting portion 71. When there is a shield between the standing portions 701 and 702, the light receiving portion 72 does not receive the light emitted by the light emitting portion 71. Therefore, the photo interrupter 70 can detect whether or not there is a shield between the standing portions 701 and 702. The photo interrupter 80 includes standing parts 801 and 802, a base part 803, a light emitting part 81, and a light receiving part 82.

尚、フォトインタラプタ７０、８０のうち少なくとも一方は変更できる。例えばフォトインタラプタの代わりにリミットスイッチ、磁気センサ等を使用してもよい。 At least one of the photo interrupters 70 and 80 can be changed. For example, a limit switch, a magnetic sensor, or the like may be used instead of the photo interrupter.

図４、図６に示すように、フォトインタラプタ７０、軸支部６５、フォトインタラプタ８０は順番に一直線上に並ぶ。軸支部６５の軸受部６６、６７（図１０参照）は、揺動部６０の軸部６３を回転可能に支持する。フォトインタラプタ７０、８０を結ぶ線分５４、より詳細には、フォトインタラプタ７０の台座部７０３（図１２参照）の長手方向の中点と、フォトインタラプタ８０の台座部７０３（図１２参照）の長手方向の中点を結ぶ線分５４と、軸支部６５が支持した状態の軸部６３の軸方向は直交する。揺動部６０の第一延設部６１と第二延設部６２が延びる平面と軸部６３の交点（以下、「揺動中心」という。）６３１は、線分５４上に位置する。 As shown in FIGS. 4 and 6, the photo interrupter 70, the shaft support 65, and the photo interrupter 80 are sequentially arranged on a straight line. Bearing portions 66 and 67 (see FIG. 10) of the shaft support portion 65 rotatably support the shaft portion 63 of the swinging portion 60. The line segment 54 connecting the photo interrupters 70 and 80, more specifically, the midpoint in the longitudinal direction of the pedestal 703 (see FIG. 12) of the photo interrupter 70 and the longitudinal length of the pedestal 703 (see FIG. 12) of the photo interrupter 80. The line segment 54 connecting the midpoints of the directions and the axial direction of the shaft portion 63 supported by the shaft support portion 65 are orthogonal to each other. An intersection (hereinafter referred to as “swing center”) 631 of the shaft portion 63 and a plane in which the first extension portion 61 and the second extension portion 62 of the swing portion 60 extend is located on the line segment 54.

図４、図５は、直立状態（図２参照）のミシン本体１０の制御基板５０に設けたセンサ４１の状態を示す。制御基板５０は、ミシンテーブル２０（図１参照）上面と直交する方向、即ち鉛直方向に対して僅かに傾斜する。図５に示すように、側面視で鉛直方向と制御基板５０との成す角度のうち小さい角度Ｒは約２０度であり、制御基板５０はミシンテーブル２０上面に対して略直交する。フォトインタラプタ８０、軸支部６５、揺動部６０、フォトインタラプタ７０は、制御基板５０の上端近傍から下方に向けて順番に、且つ、ミシンテーブル２０上面に対して略鉛直方向に並んでいる。軸支部６５の軸受部６６は、揺動部６０の軸部６３を下方から回転可能に支持する。図示していないが、軸受部６７も同様に、揺動部６０の軸部６３を下方から回転可能に支持する。 4 and 5 show the state of the sensor 41 provided on the control board 50 of the sewing machine body 10 in the upright state (see FIG. 2). The control board 50 is slightly inclined with respect to the direction orthogonal to the upper surface of the sewing machine table 20 (see FIG. 1), that is, the vertical direction. As shown in FIG. 5, a small angle R of the angle between the control board 50 and the lead straight direction in side view is about 20 degrees, the control board 50 is substantially orthogonal to a sewing machine table 20 top surface. The photo interrupter 80, the shaft support portion 65, the swinging portion 60, and the photo interrupter 70 are arranged in order from the vicinity of the upper end of the control substrate 50 downward and in a substantially vertical direction with respect to the upper surface of the sewing machine table 20. The bearing portion 66 of the shaft support portion 65 supports the shaft portion 63 of the swinging portion 60 so as to be rotatable from below. Although not shown, the bearing portion 67 similarly supports the shaft portion 63 of the swinging portion 60 so as to be rotatable from below.

揺動部６０は揺動中心６３１を中心に揺動する。図５に示すように、揺動部６０の重心６４は、揺動中心６３１から下方垂直方向に延びる直線５５上に位置する。第一延設部６１の端部６１１は制御基板５０に近接し、第二延設部６２の端部６２１は制御基板５０から離れる。第一延設部６１はフォトインタラプタ７０の立設部７０１、７０２（図１２参照）間に位置し、発光部７１が発光した光を遮る。故に受光部７２は、発光部７１が発光した光を受光しない。一方、第二延設部６２はフォトインタラプタ８０の立設部８０１、８０２（図１２参照）間に位置しない為、発光部８１が発光した光を遮らない。故に受光部８２は、発光部８１が発光した光を受光する。 The swinging part 60 swings around the swing center 631. As shown in FIG. 5, the center of gravity 64 of the swinging part 60 is located on a straight line 55 extending in the downward vertical direction from the swinging center 631. The end 611 of the first extension 61 is close to the control board 50, and the end 621 of the second extension 62 is separated from the control board 50. The first extending portion 61 is located between the standing portions 701 and 702 (see FIG. 12) of the photo interrupter 70 and blocks the light emitted by the light emitting portion 71. Therefore, the light receiving unit 72 does not receive the light emitted from the light emitting unit 71. On the other hand, since the second extending portion 62 is not located between the standing portions 801 and 802 (see FIG. 12) of the photo interrupter 80, it does not block the light emitted by the light emitting portion 81. Therefore, the light receiving unit 82 receives the light emitted from the light emitting unit 81.

図６、図７は、傾倒状態（図３参照）のミシン本体１０の制御基板５０に設けたセンサ４１の状態を示す。制御基板５０は、ミシンテーブル２０（図１参照）上面と平行な方向、即ち水平方向に対して僅かに傾斜する。図７に示すように、水平方向と制御基板５０との成す角度のうち小さい角度Ｓは約２０度であり、制御基板５０はミシンテーブル２０上面に対して略平行となる。図６に示すように、フォトインタラプタ８０、軸支部６５、揺動部６０、フォトインタラプタ７０は、ミシンテーブル２０上面に対して略並行となる方向（即ち水平方向）に並んでいる。 6 and 7 show the state of the sensor 41 provided on the control board 50 of the sewing machine body 10 in the tilted state (see FIG. 3). The control board 50 is slightly inclined with respect to the direction parallel to the upper surface of the sewing machine table 20 (see FIG. 1), that is, the horizontal direction. As shown in FIG. 7, the small angle S of the angles formed by the horizontal direction and the control board 50 is about 20 degrees, and the control board 50 is substantially parallel to the upper surface of the sewing machine table 20. As shown in FIG. 6, the photo interrupter 80, the shaft support portion 65, the swinging portion 60, and the photo interrupter 70 are arranged in a direction substantially parallel to the upper surface of the sewing table 20 (that is, in the horizontal direction).

図７に示すように、揺動部６０の重心６４は、ミシン本体１０が直立状態である場合（図５参照）と同様、揺動中心６３１から下方垂直方向に延びる直線５５上に位置する。第一延設部６１の端部６１１は制御基板５０から離れ、第二延設部６２の端部６２１は制御基板５０に近接する。第二延設部６２はフォトインタラプタ８０の立設部８０１、８０２（図１２参照）間に位置し、発光部８１が発光した光を遮る。故に受光部８２は、発光部８１が発光した光を受光しない。一方、第一延設部６１はフォトインタラプタ７０の立設部７０１、７０２（図１２参照）間に位置しない為、発光部７１が発光した光を遮らない。故に受光部７２は、発光部７１から発光した光を受光する。 As shown in FIG. 7, the center of gravity 64 of the swinging portion 60 is located on a straight line 55 extending in the downward vertical direction from the swing center 631, as in the case where the sewing machine body 10 is in the upright state (see FIG. 5). The end 611 of the first extension 61 is separated from the control board 50, and the end 621 of the second extension 62 is close to the control board 50. The second extending portion 62 is located between the standing portions 801 and 802 (see FIG. 12) of the photo interrupter 80 and blocks light emitted from the light emitting portion 81. Therefore, the light receiving unit 82 does not receive the light emitted from the light emitting unit 81. On the other hand, since the first extending portion 61 is not located between the standing portions 701 and 702 (see FIG. 12) of the photo interrupter 70, the first extending portion 61 does not block the light emitted from the light emitting portion 71. Therefore, the light receiving unit 72 receives the light emitted from the light emitting unit 71.

図１３を参照しミシン１の電気的構成について説明する。ミシン１の制御装置４０はＣＰＵ４４を備える。ＣＰＵ４４はミシン１の制御を司る。ＣＰＵ４４はＲＯＭ４５、ＲＡＭ４６を内部に備える。ＣＰＵ４４は、ＥＥＰＲＯＭ（登録商標）４７、Ｉ／Ｏインターフェース（以下「Ｉ／Ｏ」という。）４８とバスを介して接続する。ＲＯＭ４５は後述するメイン処理（図１４参照）を実行する為のプログラム等を記憶する。ＲＡＭ４６はプログラムを実行する為に必要な各種値を一時的に記憶する。ＥＥＰＲＯＭ４７は各種値を記憶する不揮発性の記憶装置である。 The electrical configuration of the sewing machine 1 will be described with reference to FIG. The control device 40 of the sewing machine 1 includes a CPU 44. The CPU 44 controls the sewing machine 1. The CPU 44 includes a ROM 45 and a RAM 46 inside. The CPU 44 is connected to an EEPROM (registered trademark) 47 and an I / O interface (hereinafter referred to as “I / O”) 48 via a bus. The ROM 45 stores a program for executing a main process (see FIG. 14) described later. The RAM 46 temporarily stores various values necessary for executing the program. The EEPROM 47 is a non-volatile storage device that stores various values.

Ｉ／Ｏ４８はペダル２２、操作キー１１２、駆動回路５１、５２、フォトインタラプタ７０、８０に電気的に接続する。ＣＰＵ４４はペダル２２の操作方向と操作量を取得する。ＣＰＵ４４は操作キー１１２から作業者による操作指示を取得する。駆動回路５１はパネル表示部１１１を駆動する。駆動回路５２は、ＣＰＵ４４から入力するトルク指令信号に応じて主軸モータ３０を駆動する。ＣＰＵ４４はフォトインタラプタ７０から、発光部７１が発光した光を受光部７２で受光したか否かを示す情報を取得する。ＣＰＵ４４はフォトインタラプタ８０から、発光部８１が発光した光を受光部８２で受光したか否かを示す情報を取得する。 The I / O 48 is electrically connected to the pedal 22, the operation key 112, the drive circuits 51 and 52, and the photo interrupters 70 and 80. The CPU 44 acquires the operation direction and operation amount of the pedal 22. The CPU 44 acquires an operation instruction from the operator from the operation key 112. The drive circuit 51 drives the panel display unit 111. The drive circuit 52 drives the spindle motor 30 in accordance with a torque command signal input from the CPU 44. The CPU 44 acquires information indicating whether or not the light emitted from the light emitting unit 71 is received by the light receiving unit 72 from the photo interrupter 70. The CPU 44 acquires from the photo interrupter 80 information indicating whether or not the light emitted from the light emitting unit 81 has been received by the light receiving unit 82.

尚、フォトインタラプタ７０において発光部７１が発光した光を受光部７２で受光しない場合、第一延設部６１は立設部７０１、７０２間に位置し、発光部７１が発光した光を遮っている。同様に、フォトインタラプタ８０において発光部８１が発光した光を受光部８２で受光しない場合、第二延設部６２は立設部８０１、８０２間に位置し、発光部８１が発光した光を遮っている。以下では、フォトインタラプタ７０において発光部７１が発光した光を受光部７２で受光しないことを、「フォトインタラプタ７０が第一延設部６１を検出した」と言い換え、発光部７１が発光した光を受光部７２で受光したことを、「フォトインタラプタ７０が第一延設部６１を検出しない」と言い換える。同様に、フォトインタラプタ８０において発光部８１が発光した光を受光部８２で受光しないことを、「フォトインタラプタ８０が第二延設部６２を検出した」と言い換え、発光部８１が発光した光を受光部８２で受光したことを、「フォトインタラプタ８０が第二延設部６２を検出しない」と言い換える。 When the light emitted from the light emitting unit 71 is not received by the light receiving unit 72 in the photo interrupter 70, the first extending portion 61 is located between the standing portions 701 and 702 and blocks the light emitted from the light emitting unit 71. Yes. Similarly, when the light emitted from the light emitting unit 81 in the photo interrupter 80 is not received by the light receiving unit 82, the second extending portion 62 is located between the standing portions 801 and 802 and blocks the light emitted from the light emitting unit 81. ing. Hereinafter, the fact that the light emitted from the light emitting unit 71 in the photo interrupter 70 is not received by the light receiving unit 72 is referred to as “the photo interrupter 70 has detected the first extending portion 61”. Receiving light by the light receiving unit 72 is rephrased as “the photo interrupter 70 does not detect the first extending portion 61”. Similarly, the fact that the light emitted from the light emitting unit 81 in the photo interrupter 80 is not received by the light receiving unit 82 is rephrased as “the photo interrupter 80 has detected the second extending portion 62”, and the light emitted from the light emitting unit 81 is Receiving light by the light receiving unit 82 is rephrased as “the photo interrupter 80 does not detect the second extending portion 62”.

図１４を参照しミシン１が実行する処理について説明する。ＣＰＵ４４はＲＯＭ４５に記憶しているプログラムに従って、図１４に示すメイン処理を実行する。ミシン１の電源がオンとなると、ＣＰＵ４４はメイン処理を開始する。 Processing executed by the sewing machine 1 will be described with reference to FIG. The CPU 44 executes the main process shown in FIG. 14 according to the program stored in the ROM 45. When the power of the sewing machine 1 is turned on, the CPU 44 starts main processing.

ＣＰＵ４４は、フォトインタラプタ７０、８０から情報を取得する（Ｓ１１）。ＣＰＵ４４は、フォトインタラプタ７０が第一延設部６１を検出したか判断する（Ｓ１３）。フォトインタラプタ７０が第一延設部６１を検出した場合（Ｓ１３：ＹＥＳ）、ＣＰＵ４４は、フォトインタラプタ８０が第二延設部６２を検出したか判断する（Ｓ１５）。フォトインタラプタ８０が第二延設部６２を検出しない場合（Ｓ１５：ＮＯ）、ＣＰＵ４４は、ミシン本体１０が直立状態（図２、図４、図５参照）であると判断し、主軸モータ３０の駆動を許可する（Ｓ１７）。ＣＰＵ４４は、ペダル２２の操作方向と操作量に基づき、主軸モータ３０を駆動する。主軸１４は回転し、針棒７と縫針８は上下に往復移動する。処理はＳ１１に戻る。 The CPU 44 acquires information from the photo interrupters 70 and 80 (S11). The CPU 44 determines whether the photo interrupter 70 has detected the first extending portion 61 (S13). When the photo interrupter 70 detects the first extending portion 61 (S13: YES), the CPU 44 determines whether the photo interrupter 80 has detected the second extending portion 62 (S15). When the photo interrupter 80 does not detect the second extending portion 62 (S15: NO), the CPU 44 determines that the sewing machine body 10 is in the upright state (see FIGS. 2, 4, and 5), and the spindle motor 30 Driving is permitted (S17). The CPU 44 drives the spindle motor 30 based on the operation direction and operation amount of the pedal 22. The main shaft 14 rotates, and the needle bar 7 and the sewing needle 8 reciprocate up and down. The process returns to S11.

フォトインタラプタ８０が第二延設部６２を検出した場合（Ｓ１５：ＹＥＳ）、フォトインタラプタ７０が第一延設部６１を検出し、且つ、フォトインタラプタ８０が第二延設部６２を検出している。ＣＰＵ４４は、フォトインタラプタ７０、８０が誤検出した状態であると判断する。ＣＰＵ４４は、主軸モータ３０の駆動を禁止する（Ｓ１９）。ＣＰＵ４４は、ペダル２２の操作方向と操作量を取得した場合、パネル表示部１１１にエラー表示をし、主軸モータ３０を駆動しない。処理はＳ１１に戻る。 When the photo interrupter 80 detects the second extending portion 62 (S15: YES), the photo interrupter 70 detects the first extending portion 61, and the photo interrupter 80 detects the second extending portion 62. Yes. The CPU 44 determines that the photo interrupters 70 and 80 are in a false detection state. The CPU 44 prohibits the driving of the spindle motor 30 (S19). When the CPU 44 acquires the operation direction and the operation amount of the pedal 22, the CPU 44 displays an error on the panel display unit 111 and does not drive the spindle motor 30. The process returns to S11.

一方、フォトインタラプタ７０が第一延設部６１を検出しない場合（Ｓ１３：ＮＯ）、ＣＰＵ４４は、フォトインタラプタ８０が第二延設部６２を検出した場合にミシン本体１０が傾倒状態（図３、図６、図７参照）であると判断し、フォトインタラプタ８０が第二延設部６２を検出しない場合にフォトインタラプタ７０、８０が誤検出した状態であると判断する。ＣＰＵ４４は、何れの状態である場合も主軸モータ３０の駆動を禁止する（Ｓ１９）。ＣＰＵ４４は、ペダル２２の操作方向と操作量を取得した場合、パネル表示部１１１にエラー表示をし、主軸モータ３０を駆動しない。処理はＳ１１に戻る。メイン処理は、ミシン１の電源がオフとなると終了する。 On the other hand, when the photo interrupter 70 does not detect the first extending portion 61 (S13: NO), the CPU 44 tilts the sewing machine body 10 when the photo interrupter 80 detects the second extending portion 62 (FIG. 3, FIG. 3). If the photo interrupter 80 does not detect the second extending portion 62, it is determined that the photo interrupters 70 and 80 are in a false detection state. The CPU 44 prohibits the driving of the spindle motor 30 in any state (S19). When the CPU 44 acquires the operation direction and the operation amount of the pedal 22, the CPU 44 displays an error on the panel display unit 111 and does not drive the spindle motor 30. The process returns to S11. The main process ends when the power of the sewing machine 1 is turned off.

以上説明したように、ミシン１は、フォトインタラプタ７０、８０を設けることで、フォトインタラプタ７０、８０の一方が故障した場合でも、他方が揺動部６０を検出できるので、ミシン本体１０が直立状態であるか又は傾倒状態であるかを検出できる。さらにミシン１は、フォトインタラプタ７０が第一延設部６１を検出し、且つ、フォトインタラプタ８０が第二延設部６２を検出しない場合にのみ、主軸モータ３０の駆動を許可し、それ以外の場合には主軸モータ３０の駆動を禁止する。故にミシン１は、ミシン本体１０が傾倒状態である場合に主軸１４が回転し、針棒７と縫針８が駆動することを確実に禁止できる。作業者は、ミシン本体１０を傾倒状態にして保守作業を安全に行うことができる。 As described above, since the sewing machine 1 is provided with the photo interrupters 70 and 80, even if one of the photo interrupters 70 and 80 breaks down, the other can detect the swinging portion 60, so that the sewing machine body 10 is in an upright state. Or the tilted state can be detected. Further, the sewing machine 1 permits the driving of the spindle motor 30 only when the photo interrupter 70 detects the first extending portion 61 and the photo interrupter 80 does not detect the second extending portion 62. In this case, the driving of the spindle motor 30 is prohibited. Therefore, the sewing machine 1 can reliably inhibit the main shaft 14 from rotating when the sewing machine body 10 is tilted and the needle bar 7 and the sewing needle 8 being driven. An operator can perform maintenance work safely by tilting the sewing machine body 10.

揺動部６０は揺動中心６３１を中心に揺動するので、ミシン本体１０の角度の変化に応じて状態を容易に変化できる。故にミシン１は、ミシン本体１０の傾倒状態を適切に検出できる。センサ４１は、揺動部６０の第一延設部６１と第二延設部６２の成す角度を調節することで、フォトインタラプタ７０、８０が夫々第一延設部６１と第二延設部６２を検出するタイミングを容易に調整できる。故にミシン１は、ミシンテーブル２０に対してミシン本体１０が特定の角度に傾倒した場合にミシン本体１０の傾倒状態を検出できる。 Since the swinging portion 60 swings around the swing center 631, the state can be easily changed according to the change in the angle of the sewing machine body 10. Therefore, the sewing machine 1 can appropriately detect the tilted state of the sewing machine body 10. The sensor 41 adjusts the angle formed by the first extending portion 61 and the second extending portion 62 of the swinging portion 60 so that the photo interrupters 70 and 80 are respectively connected to the first extending portion 61 and the second extending portion. The timing for detecting 62 can be easily adjusted. Therefore, the sewing machine 1 can detect the tilted state of the sewing machine body 10 when the sewing machine body 10 is tilted at a specific angle with respect to the sewing machine table 20.

ミシン本体１０が直立状態又は傾倒状態である場合、揺動部６０の重心６４は揺動中心６３１よりも下側に配置するので、ミシン本体１０が振動した場合でも揺動部６０は揺動し難くなる。故にミシン１は、ミシン本体１０が振動した場合にミシン本体１０の状態を誤って判断することを抑止できる。制御基板５０を脚柱部３の上部に設けることで、アーム部４に設けた針棒７が往復移動することで生じる振動は、センサ４１に伝わり難くなる。故にミシン１は、針棒７が往復移動することで生じる振動でセンサ４１がミシン本体１０の状態を誤って判断することを抑止できる。 When the sewing machine body 10 is upright or tilted, the center of gravity 64 of the swinging part 60 is disposed below the swinging center 631, so that the swinging part 60 swings even when the sewing machine body 10 vibrates. It becomes difficult. Therefore, the sewing machine 1 can suppress erroneously determining the state of the sewing machine body 10 when the sewing machine body 10 vibrates. By providing the control board 50 on the upper part of the pedestal portion 3, vibrations caused by the reciprocating movement of the needle bar 7 provided on the arm portion 4 are not easily transmitted to the sensor 41. Therefore, the sewing machine 1 can prevent the sensor 41 from erroneously determining the state of the sewing machine body 10 due to the vibration generated by the reciprocating movement of the needle bar 7.

フォトインタラプタ７０、８０を結ぶ線分５４上に揺動部６０の揺動中心６３１が位置するので、フォトインタラプタ７０、８０および揺動部６０を同一平面上に容易に配置できる。故にミシン１は、制御基板５０にセンサ４１を容易に配置できる。ミシン本体１０が直立状態である場合、制御基板５０はミシンテーブル２０の上面と略直交して垂直方向に延びる。故にフォトインタラプタ７０、８０に埃が溜まっても、該埃は下方に落ち易い。故に、フォトインタラプタ７０、８０の発光部７１、８１と受光部７２、８２の間に埃が溜まり難くなるので、埃によってセンサ４１がミシン本体１０の状態を誤って判断することを抑止できる。 Since the swing center 631 of the swing part 60 is located on the line segment 54 that connects the photo interrupters 70 and 80, the photo interrupters 70 and 80 and the swing part 60 can be easily arranged on the same plane. Therefore, the sewing machine 1 can easily arrange the sensor 41 on the control board 50. When the sewing machine body 10 is in an upright state, the control board 50 extends in a vertical direction substantially orthogonal to the upper surface of the sewing machine table 20. Therefore, even if dust accumulates in the photo interrupters 70 and 80, the dust tends to fall downward. Therefore, since dust does not easily collect between the light emitting units 71 and 81 and the light receiving units 72 and 82 of the photo interrupters 70 and 80, it is possible to prevent the sensor 41 from erroneously determining the state of the sewing machine body 10 due to dust.

フォトインタラプタ７０、８０は、発光部７１、８１で発光した光を受光部７２、８２で受光するので、繰り返し使用された場合でも、例えばミシン本体１０の状態をメカニカルスイッチで検出する場合のようにセンサへの機械的ストレスが無いので故障が発生し難い。故にミシン１は、ミシン本体１０が繰り返し傾倒した場合でもミシン本体１０の状態を正確に検出できる。 Since the photo interrupters 70 and 80 receive the light emitted from the light emitting units 71 and 81 by the light receiving units 72 and 82, even when they are repeatedly used, for example, when the state of the sewing machine body 10 is detected by a mechanical switch. There is no mechanical stress on the sensor, so failure is unlikely to occur. Therefore, the sewing machine 1 can accurately detect the state of the sewing machine body 10 even when the sewing machine body 10 is repeatedly tilted.

尚、本発明は上記実施形態に限定されず、種々の変更が可能である。例えばセンサ４１は、制御基板５０に沿ってフォトインタラプタ７０、８０間を移動する移動部を備えてもよい。該移動部は、制御基板５０の角度の変化に応じて移動してもよい。フォトインタラプタ７０、８０は、移動部の移動を検出してもよい。 In addition, this invention is not limited to the said embodiment, A various change is possible. For example, the sensor 41 may include a moving unit that moves between the photo interrupters 70 and 80 along the control board 50. The moving unit may move according to a change in the angle of the control board 50. The photo interrupters 70 and 80 may detect the movement of the moving unit.

上記実施形態では、フォトインタラプタ８０、軸支部６５、揺動部６０、フォトインタラプタ７０は、制御基板５０の上端近傍から下方に向けて順番に、且つ、ミシンテーブル２０上面に対して略鉛直方向に並んだが、これに限られない。例えば、制御基板５０の両側面がミシン１の左右方向を向いた状態で脚柱部３内に設けてある場合、センサ４１は制御基板５０の左側面又は右側面のいずれかの位置に設けてもよい。揺動部６０の軸部６３は、軸方向を鉛直方向に設けてもよい。該場合、フォトインタラプタ８０、軸支部６５、揺動部６０、フォトインタラプタ７０は鉛直方向に並べなくてもよく、例えば制御基板５０の前方から後方に向けて並べてもよい。 In the above embodiment, the photo interrupter 80, the shaft support portion 65, the swinging portion 60, and the photo interrupter 70 are sequentially from the vicinity of the upper end of the control substrate 50 downward and in a substantially vertical direction with respect to the upper surface of the sewing machine table 20. Lined up but not limited to this. For example, when both sides of the control board 50 are provided in the pedestal 3 with the left and right sides of the sewing machine 1 facing the left and right direction, the sensor 41 is provided on either the left side or the right side of the control board 50. Also good. The shaft portion 63 of the swinging portion 60 may be provided with the axial direction in the vertical direction. In this case, the photo interrupter 80, the shaft support portion 65, the swinging portion 60, and the photo interrupter 70 may not be arranged in the vertical direction, and may be arranged from the front to the rear of the control board 50, for example.

揺動部６０及び軸支部６５を二つ設けてもよい。フォトインタラプタ７０、８０は、制御基板５０の左右方向に並べて配置してもよい。該場合、一方の軸支部６５と揺動部６０をフォトインタラプタ７０の上方に配置し、他方の軸支部６５と揺動部６０をフォトインタラプタ８０の下方に配置する。ミシン１は、フォトインタラプタ７０が第一延設部６１を検出し、且つ、フォトインタラプタ８０が第二延設部６２を検出しない場合にのみ、主軸モータ３０の駆動を許可し、それ以外の場合には主軸モータ３０の駆動を禁止する。故にミシン１は、ミシン本体１０が傾倒状態である場合に主軸１４が回転し、針棒７と縫針８が駆動することを確実に禁止できる。作業者は、ミシン本体１０を傾倒状態にして保守作業を安全に行うことができる。 Two swinging portions 60 and two shaft support portions 65 may be provided. The photo interrupters 70 and 80 may be arranged side by side in the left-right direction of the control board 50. In this case, one shaft support portion 65 and the swing portion 60 are disposed above the photo interrupter 70, and the other shaft support portion 65 and the swing portion 60 are disposed below the photo interrupter 80. The sewing machine 1 permits the driving of the spindle motor 30 only when the photo interrupter 70 detects the first extending portion 61 and the photo interrupter 80 does not detect the second extending portion 62, and otherwise. In this case, the driving of the spindle motor 30 is prohibited. Therefore, the sewing machine 1 can reliably inhibit the main shaft 14 from rotating when the sewing machine body 10 is tilted and the needle bar 7 and the sewing needle 8 being driven. An operator can perform maintenance work safely by tilting the sewing machine body 10.

上記実施形態では、フォトインタラプタ７０は、制御基板５０においてフォトインタラプタ８０より下方に配置した。揺動部６０及び軸支部６５を二つ設けた場合、フォトインタラプタ７０をフォトインタラプタ８０より上方に配置してもよい。該場合でも、一方の軸支部６５と揺動部６０をフォトインタラプタ７０の上方に配置し、他方の軸支部６５と揺動部６０をフォトインタラプタ８０の下方に配置する。ミシン１は、ミシン本体１０が傾倒状態である場合に主軸１４が回転し、針棒７と縫針８が駆動することを確実に禁止できる。 In the above embodiment, the photo interrupter 70 is disposed below the photo interrupter 80 on the control board 50. When two swinging portions 60 and two shaft support portions 65 are provided, the photo interrupter 70 may be disposed above the photo interrupter 80. Even in this case, one shaft support portion 65 and the swinging portion 60 are disposed above the photo interrupter 70, and the other shaft support portion 65 and the swinging portion 60 are disposed below the photo interrupter 80. The sewing machine 1 can reliably inhibit the main shaft 14 from rotating when the sewing machine body 10 is tilted and the needle bar 7 and the sewing needle 8 being driven.

尚、上記実施形態の揺動部６０が本発明の「センサ本体」として機能する。フォトインタラプタ７０が本発明の「第一検出機構」として機能する。フォトインタラプタ８０が本発明の「第二検出機構」として機能する。 In addition, the rocking | swiveling part 60 of the said embodiment functions as a "sensor main body" of this invention. The photo interrupter 70 functions as the “first detection mechanism” of the present invention. The photo interrupter 80 functions as the “second detection mechanism” of the present invention.

１ミシン
２ベッド部
３脚柱部
４アーム部
１０ミシン本体
１１操作部
１４主軸
２０ミシンテーブル
３０主軸モータ
４１センサ
５０制御基板
５４線分
６０揺動部
６１第一延設部
６２第二延設部
６３軸部
６４重心
７０、８０フォトインタラプタ DESCRIPTION OF SYMBOLS 1 Sewing machine 2 Bed part 3 Leg pillar part 4 Arm part 10 Sewing machine main body 11 Operation part 14 Spindle 20 Sewing machine table 30 Spindle motor 41 Sensor 50 Control board 54 Line segment 60 Swing part 61 First extension part 62 Second extension part 63 Shaft 64 Center of gravity 70, 80 Photo interrupter

Claims

The sewing machine body,
A sewing machine table tiltably supporting the sewing machine body;
A sensor provided inside the sewing machine main body for detecting a state in which the sewing machine main body is upright with respect to the sewing machine table and a state in which the sewing machine main body is tilted;
In the sewing machine provided with a control unit that prohibits driving of the spindle motor that rotates the spindle when it is detected that the sewing machine main body is tilted through the sensor.
The sensor is
A sensor body whose state changes in accordance with a change in the angle of the sewing machine body with respect to the sewing machine table;
A first detection mechanism that detects the sensor body in a state in which the sewing machine body is upright and does not detect the sensor body in a state in which the sewing machine body is tilted;
A second detection mechanism that detects the sensor body in a state in which the sewing machine body is tilted and does not detect the sensor body in a state in which the sewing machine body is upright;
The controller is
A sewing machine that permits the drive of the spindle motor only when the first detection mechanism detects the sensor body and the second detection mechanism does not detect the sensor body.

The controller is
2. The sewing machine according to claim 1, wherein when the second detection mechanism detects the sensor main body or the first detection mechanism does not detect the sensor main body, the driving of the spindle motor is prohibited.

The sensor body is
A member that swings in response to a change in the angle of the sewing machine body with respect to the sewing machine table, comprising a swinging portion having a first extending portion and a second extending portion that extend in different directions from the swing center;
The first detection mechanism detects the first extension part in a state where the sewing machine main body is upright, does not detect the first extension part in a state where the sewing machine main body is tilted,
The said 2nd detection mechanism detects the said 2nd extension part in the state in which the said sewing machine main body inclined, and does not detect the said 2nd extension part in the state in which the said sewing machine main body stood upright. Or the sewing machine according to 2.

4. The sewing machine according to claim 3, wherein the center of gravity of the swinging portion is disposed below the swing center in a state where the sewing machine main body is in an upright state or tilted.

The sewing machine according to claim 3 or 4, wherein the swing center is arranged on a line segment connecting the first detection mechanism and the second detection mechanism.

A substrate substantially perpendicular to the upper surface of the sewing machine table in a state in which the sewing machine body is upright;
The sewing machine according to any one of claims 1 to 5, wherein the substrate is arranged so that the first detection mechanism and the second detection mechanism are arranged in a substantially vertical direction in a state where the sewing machine main body is upright. .

The sewing machine body is
A bed portion supported by the sewing table;
A pedestal that is erected upward in a state where the sewing machine main body stands upright from one end of the bed,
An arm portion extending from the pedestal portion to the other end side of the bed portion,
The arm part includes a needle bar that moves up and down at the other end side end of the bed part,
The sewing machine according to claim 1, wherein the sensor is disposed on the pedestal.

The sewing machine according to claim 1, wherein the first detection mechanism and the second detection mechanism are photointerrupters.