JP4565925B2 - Operation switch - Google Patents

Description

  The present invention relates to operation switches such as a push button switch, an emergency stop switch, and a rotary selector switch.

  Various operation switches such as pushbutton switches and selector switches (changeover switches) and various display lamps of devices to be operated are arranged on the control panel and the like.

  In addition, for example, a push button type emergency stop switch is arranged as a safety device on a control panel of a machine tool or the like, and power is supplied to the main circuit of the machine by pressing the emergency stop switch in an emergency. The operation can be stopped by shutting off.

  Of the operation switches that are arranged on the control panel, etc., switches that ensure the safety of workers, such as emergency stop switches, take measures (lockout) to prevent other people from operating them without permission. May have been.

  As a preventive measure, for example, as shown in FIG. 14, protection is provided by a fixed cover 201 attached to the panel surface of the switch, and a movable cover 202 rotatably supported on the upper end of the fixed cover 201 via a hinge 203. The cover 200 is configured, and the movable cover 202 of the protective cover 200 is provided with a rotation restricting hole 202 a having a shape corresponding to the operation knob (rotary knob) 211 of the switch 210, and a padlock 204 is provided below the fixed cover 201. As shown in FIG. 15, the operation knob 211 is rotated by locking the hole 201a of the padlock 204 through the hole 241 of the padlock 204 with the movable cover 202 closed, as shown in FIG. The structure which makes it impossible is proposed (for example, refer patent document 1).

  Furthermore, in the operation panel provided with the changeover switch and the pushbutton switch, a cover for freely opening and closing the pushbutton switch is provided, and a rotation restricting hole having a shape corresponding to the operation knob of the changeover switch is formed in the cover. Form a hole through which the padlock latch is passed at the tip of the control knob, and close the cover. A structure has been proposed in which the pushbutton switch cannot be operated by performing (see, for example, Patent Document 2).

As for the lockout structure of the emergency stop switch, for example, as shown in FIGS. 16A and 16B, an open / close cover 302 that covers the emergency stop switch 310 so as to be freely opened and closed is provided, and the open / close cover 302 is closed. Thus, a structure is adopted in which the hole 302a of the opening / closing cover 302 and the fixed cover 301a are locked through the latch 341 of the padlock 304.
Japanese Utility Model Publication No. 60-115423 Japanese Patent Laid-Open No. 09-019015

  By the way, according to each of the measures described above, since all of the methods lock the switch with the cover, there is a problem that the operability of the switch is impaired by the cover. In addition to the switch, other parts such as a cover are required, and the number of parts increases. Furthermore, when the cover is opened, there is a problem that an extra space for arranging the cover or the like is required and the designability when the cover is opened is poor.

  Here, for emergency stop switches used in machinery and equipment, “Easy access to an emergency stop switch (emergency stop device)” and “Not possible” according to IEC 60204-1, ISO 13850, etc. Measures for careful operation (lockout) are specified so that accessibility is not impaired. ”As mentioned above, when a cover is provided as a countermeasure for lockout, the cover becomes an obstacle. In some cases, accessibility may be impaired, and international standards such as IEC may not be satisfied.

  The present invention has been made in view of such circumstances, and lockout can be realized under a simple structure without using extra parts such as a cover, and the switch operability is not impaired. An object is to provide an operation switch having a structure.

An operation switch according to the present invention is an operation switch including a contact portion having a contact and an operation portion having a manual operation member for switching the contact of the contact portion so as to be along a side surface of the manual operation member. And a lock hole formed in each of the manual operation member and the side plate, and when the manual operation member is in a non-operation state, the lock hole of the manual operation member locks the side plate. align with the holes, is constructed such that the through-hole capable of passing the locking member is formed, when the manual operation member is rotated and moved relative to the side plate, the locking hole before Symbol manual operating member said The pushbutton is configured so that the operation switch is a pushbutton switch, and the pushbutton that is the manual operation member is pushed in. There characterized by rotating by the elastic force of the elastic body.

  According to the present invention, when a manual operation member such as a switch pushbutton or an operation knob (hereinafter collectively referred to as a pushbutton in the solution means section) is in a non-operation state, the lock hole of the pushbutton is formed. A through-hole that allows the lock member to pass through is formed in accordance with the lock hole of the side plate, so that the push button cannot be operated by locking the through-hole with a padlock latch (lockout ). Thereby, it is possible to reliably prevent an unintentional operation by a person other than the operator who performed the locking and a malfunction due to contact with the operation switch.

  In addition, a lock hole is provided in the push button itself, and a lock hole is provided in a side plate that is fixedly arranged around the side of the push button (fixed and arranged on the operation unit main body), and lockout is performed using a padlock using these lock holes Therefore, the lockout can be realized with a simple configuration without using parts other than the conventional operation switch such as a cover. Furthermore, since it is possible to have a structure in which the lockout mechanism parts do not protrude around the operation switch, the operability of the operation switch and the accessibility to the operation switch are not impaired.

The operation switch of the present invention is an operation switch including a contact portion having a contact and an operation portion having a manual operation member (operation button or operation knob) for switching the contact of the contact portion. A side plate disposed along a side surface of the member, and a lock hole formed in each of the manual operation member and the side plate, the manual operation member is operated, and the manual operation member is attached to the side plate. When the rotational movement is made, the lock hole of the manual operation member is aligned with the lock hole of the side plate so that a through hole through which the lock member can be passed is formed, and the manual operation member is in a non-operation state when it is, the manual lock hole of the operating member is configured to be a state that does not fit the lock hole of the side plate, the operation switch is a push button switch, wherein When the push button is pushed a dynamic operating member, said push button characterized in that the rotating by the elastic force of the elastic body.

  According to the present invention, when a manual operation member such as a switch pushbutton or an operation knob (hereinafter, collectively referred to as a pushbutton in the solution means section) is operated, the lock hole of the pushbutton locks the side plate. A through-hole that allows the lock member to pass through is formed in accordance with the hole, so that the push button cannot be operated (lockout) by locking the through-hole with a padlock latch. Thereby, it is possible to reliably prevent an unintentional operation by a person other than the operator who performed the locking and a malfunction due to contact with the operation switch.

  In addition, a lock hole is provided in the push button itself, and a lock hole is provided in a side plate that is fixedly arranged around the side of the push button (fixed and arranged on the operation unit main body), and lockout is performed using a padlock using these lock holes. Therefore, the lockout can be realized with a simple configuration without using parts other than the conventional operation switch such as a cover. Furthermore, since it is possible to have a structure in which the lockout mechanism parts do not protrude around the operation switch, the operability of the operation switch and the accessibility to the operation switch are not impaired. In particular, in an emergency stop switch, the accessibility to the switch is not impaired, which is an effective effect in conforming to international standards such as IEC.

When the operation switch to which the present invention is applied is a push button switch, when the push button which is a manual operation member is pushed in, the push button is rotated by the elastic force of the elastic body, and the lock hole of the push button is It is preferably configured to fit the lock hole. If you adopt such a configuration, it is possible to achieve the following effects.

  First, in a push button switch such as an emergency stop switch, if the lock hole provided in the push button and the lock hole provided in the side plate are arranged so as to be shifted in the push button push direction, and the push stroke is short, As shown in FIG. 13, when the push button is not pushed in, a part of the lock hole 101 on the push button side and a part of the lock hole 102 on the side plate overlap, and a thin wire or the like is inserted into the overlap part 13. In this way, the operation of the push button switch can be intentionally obstructed. Further, if the padlock has a smaller diameter than the lock hole and there is a backlash, there is a risk that the contact will be switched due to the presence of the backlash even though the padlock is locked. Therefore, in order to ensure the lockout, it is necessary to match the diameter of the lock hole exactly with the diameter of the latch of the padlock, and there is a problem that the degree of freedom of design becomes narrow.

  On the other hand, when the push button rotates, if the lock hole of the push button is aligned with the lock hole of the side plate, it is possible to secure a distance for shifting the lock hole of the push button and the lock hole of the side plate in the rotation direction. Therefore, even if the push-in stroke of the push button is short, a structure in which the above-described lock hole of the push button and the lock hole of the side plate do not overlap can be obtained.

  Further, when the push button has a rotating structure, the push button is configured to start rotating immediately after the push button is pushed in and the contact of the contact portion is switched, and when the push button is at the rotation end position. If a means for preventing the switching of the contact of the contact portion (for example, the stopper 32 of the flange 3 and the locking surface 13d of the locking groove 13c of the push button 13 shown in FIG. 8) is provided, the push button Even if it moves slightly in the push-in direction or the counter-push-in direction, the contact of the contact portion is not switched by the movement.

  In the operation switch of the present invention, a manual operation member such as a push button or an operation knob has a through-lock hole that penetrates the manual operation member and opens at both sides of the manual operation member, and an opening on the front surface of the manual operation member. A front-side lock hole that communicates with the through-lock hole, so that the through-lock hole matches the lock hole of the side plate when the manual operation member is in an operated state or a non-operated state. It may be configured.

  According to the operation switch of the present invention, when the push button (or the operation knob or the like) is operated (or in a non-operation state), the lock hole of the push button is aligned with the lock hole of the side plate and the lock member is passed. Since a through hole is formed, the push button cannot be operated (safety lockout) by locking the through hole with a padlock latch. As a result, it is possible to reliably prevent an unintentional operation by a person other than the operator who performed the locking, a malfunction due to contact with the operation switch, and the like. Further, the lockout can be realized with a simple configuration without using parts other than the conventional operation switch such as a cover. Furthermore, since it is possible to have a structure in which the parts of the lockout mechanism do not protrude around the operation switch, the operability of the operation switch and the accessibility to the operation switch are not impaired.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  An example in which the present invention is applied to an emergency stop switch (push-lock turn-reset pushbutton switch) will be described in detail with reference to FIGS.

  The emergency stop switch of this example includes an operation unit 1, a contact unit 2, and a flange 3. Although not shown, the contact portion 2 has a built-in B contact having a contact portion actuator.

  The operation unit 1 includes a cylindrical operation unit main body 11, an operation unit actuator 12, and a push button 13. The operation section actuator 12 is slidably fitted in the operation section main body 11, and a front circular push button 13 is provided at the front end of the operation section actuator 12. The push button 13 is slidable in the axial direction with respect to the operation unit main body 11 and is rotatable about the central axis of the operation unit main body 11.

  A circular cylindrical flange 3 whose front side is open is fixed to the operation unit main body 11. The side plate 31 of the flange 3 is disposed along the side surface of the circular push button 13. Further, a male screw portion 11 a is formed on the operation portion main body 11 on the rear side of the flange 3.

  Although not shown, the operation unit 1 is inserted into the mounting hole of the operation panel from the front side of the panel, and the back surface of the flange 3 integrally fixed to the operation unit main body 11 is brought into contact with the surface of the operation panel. In this state, the tightening nut 14 is screwed into the male threaded portion 11a from the back side of the operation panel and fastened to the operation panel. A cylindrical connecting portion 11b is provided on the rear side of the male screw portion 11a of the operation portion main body 11 (see FIG. 3). A connecting groove 11c and the like are formed on the outer peripheral surface of the connecting portion 11b, and the contact portion 2 can be connected to the operation portion 1 by using the connecting groove 11c and the like.

  As shown in FIGS. 2, 6, and 10, the operation unit actuator 12 is provided with a locking claw 12 a and a flange-shaped spring seat 12 b. The torsion coil spring 10 is sandwiched between the spring seat 12b and the spring abutting surface 13g on the inner surface side of the push button 13. One end portion (tip portion) of the torsion coil spring 10 is locked in a locking hole 13h (see FIG. 2) provided in the spring abutting surface 13g of the push button 13, and the other end portion ( The rear end) is locked in a locking hole 12c provided in the spring seat 12b of the operation unit actuator 12.

  On the other hand, a lock piece 15 is provided inside the operation unit main body 11. The lock piece 15 can be displaced in a direction orthogonal to the axial direction (operation direction) of the operation unit main body 11. A pressing spring (coil spring) 16 that presses the lock piece 15 toward the center of the operation section main body 11 is disposed between the lock piece 15 and the inner surface of the operation section main body 11.

  The lock piece 15 is removed by the locking claw 12a of the operation unit actuator 12 when the operation unit actuator 12 is pushed toward the contact unit 2 from the position shown in FIG. Then, after moving over the locking claw 12a, the front end surface of the locking claw 12a is abutted (locked) to lock the movement of the operating portion actuator 12 (FIG. 10). Further, when the push button 13 is moved in the direction opposite to the pushing direction by the operation of the push button 13 from such a locked state, the engagement between the locking claw 12a and the lock piece 15 is released. Details of the operation associated with the operation of the push button 13 will be described later.

  As shown in FIG. 2, a guide groove 13 a and a locking groove 13 c that communicates with the guide groove 13 a and extends along the circumferential direction are formed on the side surface of the push button 13. Further, a stopper 32 is formed on the inner surface of the side plate 31 of the flange 3, and the stopper 32 of the flange 3 guides the side surface of the push button 13 in a state where the push button 13 is mounted on the operation unit main body 11 as described later. It arrange | positions in the groove | channel 13a (arrangement | positioning in the state before pushing). Note that the stopper 32 of the flange 3 and the guide groove 13a and the locking groove 13c of the push button 13 are provided at two locations, respectively.

  The push button 13 is formed with two through-lock holes 13e and 13e in parallel with each other. These two through-lock holes 13e and 13e penetrate the push button 13 in a direction orthogonal to the pushing direction, and both ends thereof are opened on the side surfaces of the push button 13, respectively. Further, two front side lock holes 13f and 13f are formed on the front surface of the push button 13. Each of the front side lock holes 13f, 13f is a hole extending in parallel with the pushing direction, and each communicates with a corresponding through lock hole 13e.

  The side plate 31 of the flange 3 is formed with four lock holes 31a. The angular pitch and the opening area in the circumferential direction of these four lock holes 31a... 31a correspond to the openings 13i and 13i at both ends of the two through-lock holes 13e and 13e of the push button 13.

  Further, the positional relationship between the lock holes 31a, 31a of the flange 3 and the openings 13i, 13i of the through lock holes 13e, 13e of the push button 13 will be described. When the push button 13 is in a state before being pushed, As shown in FIG. 7, the opening 13i of the through-locking hole 13e is shifted in the circumferential direction by a distance corresponding to the amount of rotation of the push button 13 to be described later with respect to the locking hole 31a of the flange 3. And the through-lock hole 13e is in a state where there is no part that completely overlaps. On the other hand, in the state after being pushed in, all of the openings 13 i of the through-lock holes 13 e coincide with the lock holes 31 a of the flange 3.

  Next, the characteristic part of this embodiment is demonstrated.

-Applying rotational force to pushbuttons-
As described above, the push button 13 is attached to the operation portion main body 11 so as to be slidable and rotatable in the axial direction. When the push button 13 is attached to the operation portion main body 11, the torsion coil spring 10 is attached. 2 is attached to the operation unit main body 11 in a state twisted in the direction of the arrow X shown in FIG. 2, and the stopper 32 of the side plate 31 of the flange 3 is fitted into the guide groove 13 a on the side surface of the push button 13. In this state (the state before the button is pushed), the push button 13 tries to rotate in the direction of arrow Y shown in FIG. 2 by the elastic force (restoring force) of the torsion coil spring 10, but the stopper 32 of the flange 3 is pushed. The rotation of the push button 13 is regulated by hitting the regulation surface 13b of the guide groove 13a of the button 13 (FIG. 4). Thereby, the rotational force in the direction of the arrow Y shown in FIG. 2 is applied to the push button 13 by the elastic force of the torsion coil spring 10.

  When the push button 13 is pushed, the stopper 32 of the flange 3 moves along the restricting surface 13b of the guide groove 13a and exceeds the corner between the restricting surface 13b and the engaging surface 13d of the engaging groove 13c. Thus, the rotation restriction of the push button 13 by the stopper 32 is released (FIG. 8), and the push button 13 rotates in the direction of the arrow Y. The distance between the position of the stopper 32 before the button is pushed and the position where the stopper 32 exceeds the corner is set to a distance corresponding to the stroke of the push button 13. That is, the distance is set such that the b contact is separated and the separated state is maintained.

-Pushbutton operation and lockout-
When the push button 13 is pushed in from the state shown in FIGS. 4 and 7 (the state before pushing the button), the torsion coil spring 10 is compressed (compression in the pushing direction), and the operation part actuator 12 is moved to the contact part 2 side. Move towards In the movement process of the operation unit actuator 12, the contact unit actuator (not shown) of the contact unit 2 moves, and the lock piece 15 inside the operation unit main body 11 is moved outward by the locking claw 12 a of the operation unit actuator 12. The B contact (not shown) of the contact portion 2 is released when the latching claw 12a is pushed over and is turned off. Further, immediately after the B contact is released, the rotation restriction of the push button 13 by the stopper 32 of the flange 3 is released, and the push button 13 starts to rotate by the elastic force (restoring force) of the torsion coil spring 10, The stopper 32 enters the locking groove 13c. Then, with the push button 13 rotated to the end of rotation, as shown in FIGS. 8 and 11, a stopper 32 is disposed in the locking groove 13 c of the push button 13, and the through lock hole 13 e of the push button 13. All of the openings 13 i coincide with the lock holes 31 a of the flange 3.

  Thus, in the state after being pushed in, the opening 13i of the through-lock hole 13e of the push button 13 and the lock hole 31a of the flange 3 coincide with each other, so that the latch 41 of the padlock 4 is attached to the flange as shown in FIG. 3 is inserted into the through-lock hole 13e of the push button 13 through the lock hole 31a, and the latch 41 is passed through the through-lock hole 13e, and then locked to the outside through the lock hole 31a on the other side of the flange 3. Can be locked out.

  Further, the lockout can be performed using the front side lock hole 13f of the push button 13. For example, as shown in FIG. 12, a plurality of (six) lock hasps (latches) 5 are used, and one lock member 51 is opened with a pair of lock members 51, 51 of the lock hasp 5 opened. The lock hasp 5 is closed with the other lock member 51 passed through the lock hole 31a of the side plate 31 of the flange 3 through the front lock hole 13f of the push button 13, and the front lock hole 13f is passed through. If the lock members 51, 51 are passed through the lock hole 13e and the lock hole 31a of the flange 3, and then a short latch padlock is locked to each lock hole 52, 52 of the lock hasp 5, It becomes possible to ensure the safety of workers. It should be noted that instead of the lock hasp 5 capable of a plurality of locks, a short latch padlock may be locked using the front-side lock hole 13f of the push button 13.

  Here, in this example, immediately after the B contact of the contact portion 2 is separated, the push button 13 rotates (rotation by the torsion coil spring 10), and after the push button 13 starts to rotate, the flange 3 Since the movement of the push button 13 in the pushing direction is restricted by the stopper 32 and the locking surface 13d of the locking groove 13c of the push button 13 (FIG. 8), the push button 13 may move slightly in the pushing direction. The movement of the contact portion 2 is not switched by the movement.

-About unlocking-
When releasing the lockout, the operator who puts the padlock 4 or the like on the push button 13 releases the lock of each padlock 4, and the operator who performs the last lock release presses the latch 41 of the padlock 4. After being extracted from the button 13, the push button 13 is rotated against the elastic force of the torsion coil spring 10 in the direction opposite to the rotation direction by the torsion coil spring 10 described above.

  During this rotation process, the engagement between the locking claw 12a of the operation actuator 12 and the lock piece 15 of the operation section main body 11 is released, and the stopper 32 of the flange 3 is engaged with the locking groove 13c of the push button 13. When it moves along the surface 13d and exceeds the corner of the locking surface 13d of the locking groove 13c and the regulating surface 13b of the guide groove 13a, the locking of the stopper 32 by the locking surface 13d is released, Due to the elastic force of the torsion coil spring 10 (restoring force in the pushing direction), the push button 13 moves in the direction opposite to the pushing direction (direction away from the contact portion 2), and the contact B of the contact portion 2 is turned on. 4 to 7 return to the state before the operation.

  In the above example, the B contact is provided in the contact portion. However, the present invention is not limited to this, and the A contact (normally open) may be provided in the contact portion. When a plurality of contacts are provided in one push button switch, all the contacts may be A contacts or B contacts, or a combination of A contacts and B contacts may be employed.

  In the above example, the present invention is applied to the emergency stop switch. However, the present invention is not limited to this, and other operation switches such as a general push button switch and a rotary selector switch are used. Is also applicable.

  In the above example, when the push button is operated, the penetration lock hole of the push button and the lock hole of the side plate are configured to be aligned. However, the present invention is not limited to this, and the manual operation such as the push button is performed. When the operating member is in a non-operating state, the through lock hole of the manual operation member and the lock hole of the side plate match, and when the manual operation member is operated, the through lock hole of the manual operation member and the lock hole of the side plate You may comprise so that there may be no state which overlaps completely. In this case, when the manual operation member is operated, the operation manual member is rotated by the elastic force of an elastic body such as a torsion coil spring, and there is no state where the through lock hole and the lock hole of the side plate completely overlap. You may do it.

  The present invention can be used to realize lockout with a simple structure in operation switches such as a push button switch, an emergency stop switch, and a rotary selector switch.

It is a perspective view which shows an example of the emergency stop switch to which this invention is applied. It is a disassembled perspective view of the operation part of the emergency stop switch of FIG. It is a top view of the operation part of the emergency stop switch of FIG. It is a perspective view which shows the emergency stop switch (state before pushing) of FIG. It is a figure which writes and shows the front view (A) and side view (B) which show the operation part (state before pushing) of the emergency stop switch of FIG. FIG. 6 is a diagram illustrating a CC sectional view (A) and a DD sectional view (B) in FIG. 5 together. It is EE sectional drawing of FIG. It is a perspective view which shows the emergency stop switch (state after pushing) of FIG. It is a figure which shows both the front view (A) and side view (B) which show the operation part (state after pushing) of the emergency stop switch of FIG. It is a figure which writes and shows FF sectional drawing (A) and GG sectional drawing (B) of FIG. 9 together. It is HH sectional drawing of FIG. It is a perspective view which shows the emergency stop switch of FIG. 1 in use condition. It is explanatory drawing of the problem at the time of arrange | positioning a lock hole in the pushing direction of a switch. It is a perspective view which shows an example of the lockout structure of the conventional operation switch. It is a front view showing an example of lockout structure similarly. It is a side view which shows typically the other example of the lockout structure of the conventional operation switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Operation part 10 Torsion coil spring 11 Operation part main body 11a Male thread part 11b Connection part 11c Connection groove 12 Operation part actuator 12a Locking claw 12b Spring seat 12c Locking hole 13 Pushbutton (manual operation member)
13a Guide groove 13b Restricting surface 13c Locking groove 13d Locking surface 13e Through lock hole 13f Front side lock hole 13g Spring abutting surface 13h Locking hole 14 Tightening nut 15 Locking piece 16 Pressing spring (coil spring)
2 Contact 3 Flange 31 Side plate 31a Lock hole 32 Stopper 4 Padlock 41 Hatch 5 Lock hasp 51 Lock member 52 Lock hole

Claims (4)

In an operation switch comprising a contact portion having a contact and an operation portion having a manual operation member for switching the contact of the contact portion.
A side plate arranged along the side surface of the manual operation member;
A lock hole formed in each of the manual operation member and the side plate;
When the manual operation member is in a non-operating state, the lock hole of the manual operation member is aligned with the lock hole of the side plate so that a through hole through which the lock member can be passed is formed.
The manual when the operating member is rotated and moved with respect to the side plates, constructed as a lock hole before Symbol manual operation member is in a state that does not fit the lock hole of the side plate,
The operation switch is a push button switch, and the push button is rotated by an elastic force of an elastic body when the push button which is the manual operation member is pushed. In an operation switch comprising a contact portion having a contact and an operation portion having a manual operation member for switching the contact of the contact portion.
A side plate arranged along the side surface of the manual operation member;
A lock hole formed in each of the manual operation member and the side plate;
When the manual operation member is operated and the manual operation member rotates and moves with respect to the side plate, the lock hole of the manual operation member matches the lock hole of the side plate so that the lock member can be passed therethrough. Configured to form a hole,
When the manual operation member is in a non-operation state, the lock hole of the manual operation member is configured not to be aligned with the lock hole of the side plate,
The operation switch is a push button switch, and the push button is rotated by an elastic force of an elastic body when the push button which is the manual operation member is pushed.   The operation switch according to claim 1 or 2, wherein the push button is configured to start rotating immediately after the push button is pushed in and the contact of the contact portion is switched, and the push button The operation switch is provided with means for preventing switching of the contact of the contact portion when the is at the rotation end position.   The manual operation member has a through lock hole that penetrates the manual operation member and opens at both sides of the manual operation member, and a front side that has an opening on the front surface of the manual operation member and communicates with the through lock hole 2. A lock hole is formed, and the through-lock hole is configured to fit the lock hole of the side plate when the manual operation member is in an operation state or a non-operation state. The operation switch according to any one of claims 1 to 3.

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