WO2024079988A1 - 非常停止スイッチおよびこれを備えたコントローラ - Google Patents
非常停止スイッチおよびこれを備えたコントローラ Download PDFInfo
- Publication number
- WO2024079988A1 WO2024079988A1 PCT/JP2023/029837 JP2023029837W WO2024079988A1 WO 2024079988 A1 WO2024079988 A1 WO 2024079988A1 JP 2023029837 W JP2023029837 W JP 2023029837W WO 2024079988 A1 WO2024079988 A1 WO 2024079988A1
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- WO
- WIPO (PCT)
- Prior art keywords
- emergency stop
- stop switch
- push button
- contacts
- contact
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/26—Snap-action arrangements depending upon deformation of elastic members
- H01H13/28—Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs
- H01H13/30—Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs one end of spring transmitting movement to the contact member when the other end is moved by the operating part
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
- H01H13/62—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon manual release of a latch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
- H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
Definitions
- the present invention relates to an emergency stop switch, and more specifically to an improved structure that improves stability when the contacts are connected or disconnected.
- Japanese Patent No. 3899281 describes an emergency stop push button switch. As shown in paragraph [0053] and in Figures 1 and 2 of the publication, this push button switch (1) has first and second contacts (17, 21) that can be connected and disconnected, and a spring (31) as a disconnection biasing means that biases the second contact (21) in an opening direction so that it is no longer in contact with the first contact (17).
- the spring (31) is provided as a separation biasing means, so that the first and second contacts (17, 21) in a contacting state are biased in a separation direction to be non-contact, and the biasing force of the spring (31) after the push button is pressed is smaller than the biasing force of the spring (31) before the push button is pressed.
- Japanese Patent No. 5059594 describes a push button switch. As shown in paragraph [0028] and Figures 5 to 10 of the same publication, this push button switch has a stress transmission shaft (62) that moves when an operating handle (11) is operated, and the contacts are connected and disconnected in conjunction with the movement of the stress transmission shaft (62).
- Japanese Patent No. 7042136 describes an emergency stop push button switch.
- this emergency stop push button switch (1) has a button (101) and a housing (301) that holds it.
- the button (101) has an outer annular portion (101) arranged on the outer periphery and an inner annular portion arranged radially inward at a predetermined distance. No reference symbol is given to the inner annular portion, but it is hatched in the same direction (diagonally downward to the right) as the outer annular portion (101).
- the inner annular portion has multiple outer periphery protrusions that protrude radially outward.
- the housing (301) is not given a reference number, but it is an annular member disposed between the outer annular portion (101) and the inner annular portion of the button (101), and is hatched diagonally upward to the right.
- the housing (301) is formed with multiple inner circumferential convex portions that protrude radially inward, and the inner circumferential convex portions are disposed between adjacent outer circumferential convex portions of the button (101).
- the outer circumferential convex portions of the button (101) abut against the corresponding inner circumferential convex portions of the housing (301) in the circumferential direction, thereby preventing the button (101) from rotating excessively.
- Japanese Patent No. 3899281 see paragraphs [0053], [0071] to [0072], and Figs. 1 and 2)
- Japanese Patent No. 5059594 see paragraph [0028], Figs. 5 to 10
- Japanese Patent No. 7042136 see Fig. 1, Fig. 5(A), Fig. 5(B)
- the push button switch described in the above-mentioned Patent Publication No. 3899281 is provided with only one spring (31) as an opening biasing means, and is located below (directly below) the first and second contacts (17, 21) on one side of the switch central axis, and the spring (31) and the first and second contacts (17, 21) are located at equal distances from the switch central axis (i.e., at the same radial position).
- the present invention was made in consideration of such conventional circumstances, and the problem that the present invention aims to solve is to provide an emergency stop switch that can improve stability when the contacts are connected and disconnected.
- the present invention also aims to further improve the stability of the emergency stop switch when the contacts are connected and disconnected by reducing the wobble of the shaft.
- the present invention aims to increase the twisting strength of the push button in such an emergency stop switch.
- the emergency stop switch of the present invention has a plurality of opening biasing springs that bias a plurality of contacts arranged at radial distances from the center of the switch in an opening direction, and each opening biasing spring is arranged radially outward of each contact.
- the separation biasing force of the separation biasing springs can be sufficiently applied to multiple contacts in the separation direction, improving stability when each contact is connected and disconnected (i.e., contacting and disconnecting), and the load required for the Safety Potential (registered trademark), which applies a force in the opening direction where the contacts are not in contact, can be separated to multiple positions relative to the switch center, providing the effect of doubling (or multiplexing) the force in the opening direction.
- the separation biasing springs are arranged radially outward of each contact arranged at a radial distance from the switch center, stability when each contact is connected and disconnected (contacting and disconnecting) can be further improved, and the emergency stop switch can be made shorter, resulting in a short-body emergency stop switch.
- each opening spring when a contact circle is drawn around the switch center and passing through each contact, each opening spring is positioned outside the contact circle.
- the opening springs are arranged at substantially equal intervals on the circumference.
- the contacts are composed of multiple fixed contacts and multiple corresponding movable contacts, and each opening biasing spring biases each movable contact in a direction to open it from its corresponding fixed contact.
- a push button is provided and a shaft portion is movable by operating the push button, and a pair of first holding members for holding the push button in a pre-push operation position are arranged opposite each other around the shaft portion, sandwiching the shaft portion, and a pair of second holding members for holding the shaft portion from the outer periphery in a direction intersecting the arrangement direction of the first holding members are arranged opposite each other around the shaft portion.
- the first and second holding members hold the shaft from the outer periphery in directions that intersect with each other, so the shaft can be securely held from the outer periphery and the shaft can be prevented from rattling in the radial direction during operation. This further improves the stability of each contact when it is made to come into contact and separated from the other contacts.
- the first retaining member is composed of an engaging member having an engaging surface that releasably engages with an engaged surface formed on the outer periphery of the shaft portion, and a biasing member that biases the engaging member toward the shaft portion.
- the second retaining member has an inner surface that extends circumferentially along the outer periphery of the shaft portion.
- a push button and a main body that holds it rotatably are provided, the main body is provided with a rotation stopper having a regulating surface for regulating the rotation of the push button, and the push button is provided with an abutment portion having an abutment surface that can abut against the regulating surface of the rotation stopper.
- the rotation stopper protrudes radially inward and the regulating surface has a tapered surface that tapers toward the outer periphery
- the abutment portion protrudes radially outward and the abutment surface has a tapered surface that tapers toward the inner periphery
- the rotation stopper protrudes radially outward and the regulating surface has a tapered surface that tapers toward the inner periphery
- the abutment portion protrudes radially inward and the abutment surface has a tapered surface that tapers toward the outer periphery.
- an excessive pressing force acts from the contact portion of the push button on the regulating surface of the rotation stopper of the main body, and an excessive pressing force acts from the rotation stopper of the main body on the contact surface of the contact portion of the push button.
- the radial components of these pressing forces all act in a direction that more firmly engages the contact portion of the push button and the rotation stopper of the main body, thereby increasing the twisting strength of the push button.
- the regulating surfaces are disposed on both sides of the rotation stopper, and both sides are tapered, while the abutment surfaces are disposed on both sides of the abutment portion, and both sides are tapered.
- the controller according to the present invention is equipped with the emergency stop switch described above.
- multiple rotation stoppers are arranged in the circumferential direction, and multiple abutment portions are arranged in the circumferential direction between each of the rotation stoppers that are adjacent in the circumferential direction.
- the present invention makes it possible to realize an emergency stop switch that can improve stability when the contacts are connected or disconnected.
- FIG. 1 is an overall perspective view of an emergency stop switch according to an embodiment of the present invention
- FIG. 2 is a bottom view showing the internal structure of the emergency stop switch ( FIG. 1 ).
- 3 is a diagram for explaining the positional relationship between each contact and each separation biasing spring in FIG. 2 .
- FIG. FIG. 2B is a diagram showing a variation of FIG. 2A.
- FIG. 3 is a perspective view of the emergency stop switch ( FIG. 2 ) as viewed from diagonally below on the left side of the figure.
- FIG. 3 is a perspective view of the emergency stop switch ( FIG. 2 ) as viewed from diagonally below on the right side of the figure.
- FIG. 4 is a diagram showing the emergency stop switch (FIG. 3) with a tip of a fixed terminal facing upward.
- FIG. 3 is a diagram for explaining the positional relationship between each contact and each separation biasing spring in FIG. 2 .
- FIG. 2B is a diagram showing a variation of FIG. 2A.
- FIG. 5 is a diagram showing the emergency stop switch (FIG. 4) with a tip of a fixed terminal facing upward.
- FIG. 6 is a diagram showing a state in which a push button is attached to the emergency stop switch (FIG. 5).
- FIG. 2 is a plan view of the cross section of the emergency stop switch (FIG. 1) viewed from above (push button side), showing the support structure of the shaft portion.
- FIG. 9 is a perspective view of the emergency stop switch ( FIG. 8 ) as viewed obliquely from above.
- FIG. 13 is a diagram for explaining the support structure (FIG. 8), and is an internal structural diagram of the emergency stop switch (FIG. 1) with the push button, main body, holding block, etc. removed, as viewed from the front side.
- FIG. 11 is a diagram showing FIG. 10 turned upside down with the shaft portion omitted.
- FIG. 11 is a plan view of FIG. 10 as viewed from above.
- FIG. 2 is a plan view illustrating a rotation prevention structure of a push button in the emergency stop switch (FIG. 1) as viewed from the top side of the push button.
- FIG. 14 is a perspective view of the push button (FIG. 13) seen from the back side, showing a contact portion provided on the push button.
- FIG. 14 is a rear view of the push button (FIG. 13).
- FIG. 14 is a perspective view of the main body that holds the push button (FIG. 13) as seen obliquely from above, showing a rotation stopper provided on the main body.
- FIG. 14 is a perspective view of the main body that holds the push button (FIG. 13) as seen obliquely from above, showing a rotation stopper provided on the main body.
- FIG. 17 is a plan view of the main body (FIG. 16).
- 16A and 16B are diagrams showing an example of a state in which the abutment portion (FIG. 14) of the push button (FIG. 13) and the rotation stopper (FIG. 16) of the main body portion (FIG. 16) are engaged with each other;
- 19 is a partial enlarged view of FIG. 18, showing the pressing force acting on the regulating surface of the rotation stopper in the engaged state (FIG. 18).
- FIG. FIG. 20 is a diagram showing the pressing force (FIG. 19) decomposed into a direction toward the center of the switch (radial direction) and a direction perpendicular thereto (circumferential direction).
- 19 is a partially enlarged view of FIG.
- FIG. 18 shows the pressing force acting on the contact surface of the contact portion in the engaged state (FIG. 18).
- FIG. FIG. 22 is a diagram showing the pressing force (FIG. 21) resolved into a direction toward the center of the switch (radial direction) and a direction perpendicular thereto (circumferential direction).
- FIG. 20 is a diagram showing a conventional anti-rotation structure for a push button, corresponding to FIG. 19 of the present embodiment, and showing the pressing force acting on the regulating surface of the anti-rotation when the abutment portion of the push button and the anti-rotation are in an engaged state.
- FIG. 24 is a diagram showing the pressing force (FIG.
- FIG. 23 is a diagram showing a direction toward the switch center (radial direction) and a direction perpendicular thereto (circumferential direction).
- FIG. 24 is a diagram showing the pressing force acting on the contact surface of the contact portion in the engaged state of FIG. 23, and corresponds to FIG. 21 of this embodiment.
- FIG. 27 is a diagram showing the pressing force (FIG. 25) decomposed into a direction toward the switch center (radial direction) and a direction perpendicular thereto (circumferential direction).
- 15A and 15B are diagrams illustrating the arrangement of the contact portion (FIG. 15) of the push button (FIG. 13).
- FIG. 18 is a schematic diagram showing the arrangement of the rotation stopper (FIG. 17) of the main body (FIG. 17).
- FIG. 28 is a diagram showing a modified example of FIG. 27 .
- FIG. 29 is a diagram showing a modified example of FIG. 28 .
- FIGS. 1 to 7 are diagrams for explaining an emergency stop switch according to an embodiment of the present invention, in which FIG. 1 is an external view of the emergency stop switch, and FIGS. 2 to 7 are diagrams showing the internal structure of the emergency stop switch.
- the emergency stop switch 1 includes a push button 2, a main body 3 that holds the push button 2 so that it can move axially (up and down in the figure) and rotate circumferentially, a lock nut 4 that screws into a male thread formed on an end 30 of the main body 3, a number of fixed terminals 5 that extend downward in the figure from the underside of the end 30 of the main body 3, and a number of movable terminals (described below) that respectively correspond to each of the fixed terminals 5.
- the push button 2 can be manually pushed in (downward in Fig. 1) by an operator and can be returned to its original position in the pulling direction (upward in Fig. 1) and circumferential direction.
- the lock nut 4 is used to attach the emergency stop switch 1 to the panel of a machine, control device, etc.
- the emergency stop switch 1 has a roughly cylindrical holding block 10 (see FIGS. 5 to 7) that is attached to the main body 3 (FIG. 1), and the holding block 10 has a through hole 10a in the center. A point on the central axis of the holding block 10 is called the switch center O.
- One end of a shaft 11 extending in the axial direction is inserted into the through hole 10a of the holding block 10, and the other end of the shaft 11 extends to the back side of the paper surface of the same figure and is installed inside the push button 2 (see FIGS. 5 to 7).
- the shaft 11 can be moved in the axial direction (i.e., the pushing operation direction and the return operation direction opposite thereto) by operating the push button 2.
- a pair of first retaining members 12, 13 are provided on the outer periphery of the retaining block 10 (see Figures 3 to 7). These first retaining members 12, 13 are disposed opposite each other with the shaft portion 11 in between, and are disposed at positions substantially 180 degrees apart in the circumferential direction. The first retaining members 12, 13 act on the shaft portion 11 from the outer periphery before the push button 2 is pressed, thereby retaining the push button 2 in the pre-pressing position.
- the first retaining member 12 is composed of an engaging member 12A having an engaging surface (described later) that releasably engages with an engaged surface (described later) formed on the outer periphery of the shaft portion 11, and a spring 12B as a biasing member that biases the engaging member 12A toward the shaft portion 11.
- the first retaining member 13 is composed of an engaging member 13A having an engaging surface (described later) that releasably engages with an engaged surface (described later) formed on the outer periphery of the shaft portion 11, and a spring 13B as a biasing member that biases the engaging member 13A toward the shaft portion 11.
- a pair of movable terminals 6, 6' are arranged at positions facing each other across the switch center O.
- Each movable terminal 6 is a thin plate-like member extending in the longitudinal direction, and in this example, is arranged parallel to each other.
- a movable contact (contact) C1 is provided at both ends of the movable terminal 6, and similarly, a movable contact (contact) C2 is provided at both ends of the movable terminal 6'.
- Each movable contact C1 , C2 is arranged opposite to each fixed contact (contact) 5c (see Figures 5 to 7) of the corresponding fixed terminal 5.
- the fixed terminal 5 is fixed to the main body 3 ( Figure 1).
- Each movable terminal 6, 6' is biased toward the fixed terminal 5 by the biasing force of each coil spring 7, 7' (see Figures 5 to 6), and each movable contact C1 , C2 of each movable terminal 6, 6' is elastically abutted against each fixed contact 5c of the opposing fixed terminal 5, applying a predetermined contact pressure to each fixed contact 5c.
- the movable terminals 6, 6' and the coil springs 7, 7' are unitized as a movable terminal unit 15 (see Figs. 5 to 7), and the movable terminal unit 15 is movable in the axial direction (perpendicular to the paper surface of Fig. 2) together with the movement of the shaft 11 by the operation of the push button 2.
- the movable terminal unit 15 moves the movable terminals 6, 6' away from the fixed terminal 5, and the movable contacts C1 , C2 of the movable terminals 6, 6' are separated from the fixed contacts 5c of the fixed terminal 5, and when the push button 2 is returned to its original position in the pulling direction, the movable terminal unit 15 moves the movable terminals 6, 6' toward the fixed terminal 5, and the movable contacts C1 , C2 of the movable terminals 6, 6' come into contact with the fixed contacts 5c of the fixed terminal 5. In this way, the movable contacts C1 , C2 can be brought into contact with and separated from the fixed contacts 5c.
- the fixed contacts of a pair of fixed terminals 5m (see FIGS. 3 to 7) arranged between the movable terminals 6, 6' and the movable contacts of a pair of movable terminals 6m (see FIGS. 5 to 7) arranged opposite each of them constitute monitor contacts for monitoring the operating state of the emergency stop switch.
- the movable terminal unit 15 moves so that the movable contact of the movable terminal 6m comes into contact with the fixed contact of the fixed terminal 5m, and when the push button 2 is released, the movable terminal unit 15 moves so that the movable contact of the movable terminal 6m opens from the fixed contact of the fixed terminal 5m.
- the movable contacts C 1 , C 2 of the movable terminals 6, 6' are disposed at a radial distance R from the switch center O, and are disposed on the contact circle CC when a circle CC of radius R (hereinafter referred to as a "contact circle") is drawn with the switch center O as the center.
- the movable contacts C 1 , C 2 may be disposed at substantially equal intervals on the circumference of the contact circle CC.
- Separation biasing springs 14, 14' are provided at positions facing each other across the switch center O.
- the separation biasing springs 14, 14' are disposed at a radial distance R'(>R) from the switch center O, and when a circle CC' of radius R' is drawn with the switch center O as the center, the centers O 1 , O 2 of the separation biasing springs 14, 14' are disposed on the circle CC'. That is, the separation biasing springs 14, 14' are disposed outside the contact point circle CC and disposed radially outward from the contact points C 1 and C 2. In Fig. 2, the positions of the separation biasing springs 14, 14' are indicated by centers O 1 and O 2 , respectively.
- Each of the separation biasing springs 14, 14' biases the movable contacts C1 , C2 of the movable terminals 6, 6' in a separation direction away from the fixed contacts 5c of the fixed terminal 5, and is attached to the movable terminal unit 15.
- the separation biasing springs 14 are disposed near the movable contacts C1 , preferably at positions substantially equidistant from the movable contacts C1 .
- the separation biasing springs 14' are disposed near the movable contacts C2 , preferably at positions substantially equidistant from the movable contacts C2 .
- the separation biasing springs 14 are primarily for separating the movable contacts C1
- the separation biasing springs 14' are primarily for separating the movable contacts C2 .
- the contact configuration of the emergency stop switch 1 is shown as a two-contact type (not including a monitor contact) consisting of movable contacts C1 and C2 (and their corresponding fixed contacts 5c), but the application of the present invention is not limited to this, and it may be a three-contact type or may include more contacts than that.
- Fig. 2B shows an example of a three-contact type.
- the movable terminal is composed of two movable terminals 6, 6' arranged parallel to each other, but in the example of Fig. 2B, the movable terminal is composed of three movable terminals 6, 6', 6". Adjacent movable terminals 6 and 6', 6' and 6", 6" and 6 all intersect at acute angles, and the movable terminals 6, 6', 6" are arranged in a roughly triangular shape.
- a movable contact (contact) C1 is provided at both ends of the movable terminal 6, a movable contact (contact) C2 is provided at both ends of the movable terminal 6', and a movable contact (contact) C3 is provided at both ends of the movable terminal 6".
- Each of the movable contacts C1 , C2 , C3 is arranged opposite a fixed contact (contact) (not shown) of a corresponding fixed terminal.
- Each of the movable contacts C1 , C2 , C3 of the movable terminals 6, 6', 6" elastically abuts against the fixed contact of the opposing fixed terminal, applying a predetermined contact pressure to each fixed contact.
- Each movable contact C1 , C2 , C3 of each movable terminal 6, 6', 6" is arranged at a position radially away from the switch center O, and is arranged on the contact circle CC when a circle (contact circle) CC of radius R is drawn with the switch center O as its center.
- Each movable contact C1 , C2 , C3 may be arranged at substantially equal intervals on the circumference of the contact circle CC.
- each opening biasing spring 14, 14', 14" is arranged outside the contact circle CC, and radially outside the contacts C1 , C2 , C3 .
- the separation biasing springs 14, 14', 14'' are arranged at equal intervals in the circumferential direction on the circle CC'.
- FIG. 2B an example is shown in which the opening biasing spring 14 is disposed between the ends of each movable terminal 6, 6', the opening biasing spring 14' is disposed between the ends of each movable terminal 6', 6", and the opening biasing spring 14" is disposed between the ends of each movable terminal 6", 6, but the arrangement of the opening biasing springs 14, 14', 14" is not limited to this.
- Each separation biasing spring 14, 14', 14" may be arranged at a position on the circle CC' facing the center of each movable terminal 6, 6', 6".
- the separation biasing spring 14 may be arranged at a midpoint between the movable contacts C1 of the movable terminal 6 on the circle CC'
- the separation biasing spring 14' may be arranged at a midpoint between the movable contacts C2 of the movable terminal 6' on the circle CC'
- the separation biasing spring 14" may be arranged at a midpoint between the movable contacts C3 of the movable terminal 6" on the circle CC'.
- two or more separation biasing springs are provided as the separation biasing springs, so that the biasing force in the separation direction by the separation biasing springs can be sufficiently applied to the multiple contacts, thereby improving the stability when each contact is brought into contact and separated (contact/open). Furthermore, according to this embodiment, the load required for the Safety Potential (registered trademark), which applies a force in the separation direction where the contacts are no longer in contact, can be separated to multiple positions relative to the center of the switch, thereby providing the effect of doubling (or multiplexing) the force in the separation direction.
- the Safety Potential registered trademark
- the opening biasing spring is disposed radially outward of each contact that is disposed at a radial distance from the center of the switch, which further improves the stability of each contact when making and separating (contacting and separating), and also allows the emergency stop switch to be made shorter, resulting in a short-body type emergency stop switch.
- FIG. 8 is a plan view of the cross section of the emergency stop switch (FIG. 1) as viewed from above (the push button side), and FIG. 9 is a perspective view thereof.
- a pair of second holding members 31, 32 are arranged in a direction D2 intersecting (for example, a direction perpendicular to) the arrangement direction D1 of the pair of first holding members 12, 13.
- the second holding members 31, 32 are integrally connected to the main body 3 inside the main body 3, arranged opposite each other across the shaft portion 11, and are members for holding the shaft portion 11 from the outer periphery.
- the second holding members 31, 32 are wall-shaped members (see Fig. 9) arranged in an arc shape along the circumferential direction and extending in the axial direction (up and down direction in Fig. 8), and each have inner circumferential surfaces 31a, 32a extending in an arc shape along the outer periphery of the shaft portion 11.
- the inner circumferential surface 31a is arranged opposite the outer circumferential surface 11C- 1 of the shaft portion 11, and the inner circumferential surface 32a is arranged opposite the outer circumferential surface 11C -2 of the shaft portion 11.
- Figure 10 is a diagram of the internal structure of the emergency stop switch (Figure 1) seen from the front with the push button, main body, and holding block removed, Figure 11 is a diagram of Figure 10 without the shaft, and Figure 12 is a plan view of Figure 10 seen from above.
- the outer peripheral surface of the shaft portion 11 has a pair of flange portions 11A, 11B that protrude radially outward.
- the flange portions 11A, 11B are disposed at positions facing each other across the axis, and each has a generally mountain-shaped vertical cross section.
- the flange portion 11A has an inclined surface (engaged surface) 11a1 disposed on the lower side in the figure, and an inclined surface 11a2 disposed on the upper side in the figure.
- the flange portion 11B has an inclined surface (engaged surface) 11b1 disposed on the lower side in the figure, and an inclined surface 11b2 disposed on the upper side in the figure.
- the tip of each of the engaging members 12A, 13A of the first holding members 12, 13 has a generally mountain-shaped cross section in front view.
- the tip of the engaging member 12A has an inclined surface 12a1 arranged on the upper side in the figure and an inclined surface 12a2 arranged on the lower side in the figure
- the tip of the engaging member 12B has an inclined surface 13a1 arranged on the upper side in the figure and an inclined surface 13a2 arranged on the lower side in the figure (see Figures 11 and 12).
- the inclined surface 12a1 at the tip of the engaging member 12A of the first holding member 12 abuts against and engages with the inclined surface 11a1 of the flange portion 11A of the shaft portion 11, and similarly, the inclined surface 13a1 at the tip of the engaging member 13A of the first holding member 13 abuts against and engages with the inclined surface 11b1 of the flange portion 11B of the shaft portion 11.
- the shaft portion 11 is held in the pre-push-in position by the first holding members 12 and 13.
- the shaft portion 11 is held from the outer periphery by the first holding members 12, 13 and the second holding members 31, 32 in mutually intersecting directions, so that the shaft portion 11 can be securely held from the outer periphery, reducing rattling of the shaft portion and preventing the occurrence of radial rattling of the shaft portion 11 during operation. This further improves the stability when each contact is made and separated (contacted and separated).
- the push button 2 has a cylindrical surface forming the outer peripheral surface of the push button 2, an outer cylindrical portion 20 that opens downward (toward the back of the paper in Fig. 13), and an inner cylindrical portion 21 that is arranged concentrically with the outer cylindrical portion 20 at a predetermined distance radially inward from the outer cylindrical portion 20 and also opens downward.
- a pair of abutment portions 22, 23 that protrude radially outward are integrally connected to the outer peripheral surface of the inner cylindrical portion 21.
- the abutment portions 22, 23 are arranged at positions facing each other on the outer peripheral surface of the inner cylindrical portion 21 (i.e., at equal intervals on the outer circumference).
- the left and right side surfaces of the abutment portion 22 form abutment surfaces 22a, 22b that can abut against a rotation stopper (described later) of the main body portion 3, and similarly, the left and right side surfaces of the abutment portion 23 form abutment surfaces 23a, 23b that can abut against a rotation stopper (described later) of the main body portion 3.
- the main body 3 that rotatably holds the push button 2 has a cylindrical portion 3A that forms the outer peripheral surface of the main body 3, as shown in Figures 16 and 17.
- a pair of rotation stoppers 33, 34 that protrude radially inward are integrally attached to the inner peripheral surface of the cylindrical portion 3A.
- the rotation stoppers 33, 34 are arranged in opposing positions on the inner peripheral surface of the cylindrical portion 3A (i.e., at equal intervals on the inner circumference).
- the left and right side surfaces of the rotation stoppers 33, 34 form restriction surfaces 33a, 33b, 34a, 34b that restrict the rotation of the push button 2 by abutting with one of the abutment surfaces 22a, 22b, 23a, 23b of the abutment portions 22, 23 of the push button 2.
- the cylindrical portion 3A of the main body 3 is disposed in the internal space between the outer cylindrical portion 20 and the inner cylindrical portion 21 (Figs. 14 and 15) of the push button 2, and at this time, the abutment portions 22, 23 of the push button 2 are disposed between the rotation stoppers 33, 34 of the main body 3.
- the abutment portion 22 is disposed in the internal space on the upper side of the main body 3 shown in Fig. 17 and the abutment portion 23 is disposed in the internal space on the lower side of the main body 3 shown in the same figure, when the push button 2 is rotated counterclockwise in Fig.
- the abutment surface 22a of the abutment portion 22 abuts against the regulating surface 33a of the rotation stopper 33 of the main body 3, and the abutment surface 23a of the abutment portion 23 abuts against the regulating surface 34a of the rotation stopper 34 of the main body 3.
- the abutment surface 22b of the abutment portion 22 abuts against the restricting surface 34b of the rotation stopper 34 of the main body portion 3
- the abutment surface 23b of the abutment portion 23 abuts against the restricting surface 33b of the rotation stopper 33 of the main body portion 3.
- the rotation stopper 33 has a generally trapezoidal shape, with its outer circumferential length (upper base length) Lo being shorter than its inner circumferential length (lower base length) Li, and the regulating surfaces 33a and 33b of the rotation stopper 33 being tapered surfaces that taper toward the outer circumferential side (downward in the figure).
- the abutment portion 22 has a generally trapezoidal shape that is upside down from the trapezoidal shape of the rotation stopper 33, with its inner circumferential length (upper base length) Li' being shorter than its outer circumferential length (lower base length) Lo', and the abutment surfaces 22a and 22b of the abutment portion 22 being tapered surfaces that taper toward the inner circumferential side (upper in the figure).
- the angle ⁇ between the lower base and the oblique side of the rotation stopper 33 is an acute angle
- the angle ⁇ between the lower base and the oblique side of the abutment portion 22 is an acute angle.
- a pressing force F acts from the abutment surface 22a of the abutment portion 22 to the regulating surface 33a of the rotation stopper 33.
- the pressing force F is perpendicular to the abutment surface 22a.
- the radial component Fr is directed radially inward.
- the radial component Fr acts in a direction that strengthens the engagement state of the regulating surface 33a with the abutment surface 22a.
- a pressing force F' acts on the contact surface 22a of the contact portion 22 from the regulating surface 33a of the rotation stopper 33.
- the pressing force F' is equal to the pressing force F at the same point of application as the pressing force F, but for ease of illustration and explanation, attention is focused on the force acting at a different point of application than the pressing force F.
- the pressing force F' is perpendicular to the regulating surface 33a.
- the radial component F'r is directed radially outward.
- the radial component F'r acts in a direction that strengthens the engagement state of the contact surface 22a with the regulating surface 33a.
- Figures 23 to 26 correspond to Figures 19 to 22 of this embodiment, respectively.
- the rotation stopper 33' has a generally trapezoidal shape, with its inner circumferential length (upper base length) li being shorter than its outer circumferential length (lower base length) lo, and the regulating surfaces 33'a, 33'b of the rotation stopper 33' being tapered toward the inner circumferential side (upper side in the figure).
- the abutment portion 22' has a generally trapezoidal shape that is upside down from the generally trapezoidal shape of the rotation stopper 33', with its outer circumferential length (upper base length) lo' being shorter than its inner circumferential length (lower base length) li', and the abutment surfaces 22'a, 22'b of the abutment portion 22' being tapered toward the outer circumferential side (lower side in the figure).
- the angle ⁇ ' between the upper base and the oblique side of the rotation stopper 33' is an obtuse angle
- the angle ⁇ ' between the upper base and the oblique side of the abutment portion 22' is an obtuse angle.
- a pressing force f acts from the abutment surface 22'a of the abutment portion 22' to the regulating surface 33'a of the rotation stopper 33'.
- the pressing force f is perpendicular to the abutment surface 22'a.
- the radial component fr is directed radially outward.
- the radial component fr acts in a direction that makes it easier for the regulating surface 33'a to disengage from the abutment surface 22'a.
- a pressing force f' acts from the regulating surface 33'a of the rotation stopper 33' to the abutment surface 22'a of the abutment portion 22'.
- the pressing force f' is perpendicular to the regulating surface 33'a.
- the radial component f'r is directed radially inward.
- the radial component f'r acts in a direction that makes it easier for the abutment surface 22'a to disengage from the regulating surface 33'a.
- Figs. 27 and 28 are schematic diagrams showing the arrangement of the contact portions 22, 23 of the push button 2 and the rotation stoppers 33, 34 of the main body 3 in the above embodiment, and correspond to Figs. 15 and 17, respectively.
- the same reference numerals as in the above embodiment indicate the same or corresponding parts.
- the rotation stoppers 33; 34 of the main body 3 protrude radially inward (see Figs. 28 and 17) and the regulating surfaces 33a, 33b; 34a, 34b have tapered surfaces that taper toward the outer periphery (see Fig. 28), and the contact portions 22, 23 of the push button 2 protrude radially outward (see Figs. 27 and 15) and the contact surfaces 22a, 22b; 23a, 23b have tapered surfaces that taper toward the inner periphery (see Fig. 27), but the application of the present invention is not limited to this.
- FIGS. 29 and 30 show a modified example of the above embodiment, with FIG. 29 corresponding to FIG. 27 and FIG. 30 corresponding to FIG. 28.
- FIG. 29 and FIG. 30 the same reference numerals as in the above embodiment indicate the same or equivalent parts.
- the abutment portions 221 ; 231 of the push button 2 protrude radially inward from the inner peripheral surface of the outer cylindrical portion 20, and each of the abutment surfaces 221a , 221b ; 231a , 231b has a tapered surface that tapers toward the outer peripheral side.
- the rotation stoppers 331 ; 341 of the main body 3 protrude radially outward from the outer peripheral surface of the inner cylindrical portion 3B disposed radially inward of the cylindrical portion 3A, and each of the regulating surfaces 331a , 331b ; 341a , 341b has a tapered surface that tapers toward the inner peripheral side.
- both side surfaces of the rotation stoppers 33 and 34 were formed with a double taper, but only one side surface of the rotation stopper 33 may be formed with a taper and the other side surface of the rotation stopper 33 may be a surface extending radially toward the switch center O, and similarly, only one side surface of the rotation stopper 34 may be formed with a taper and the other side surface of the rotation stopper 34 may be a surface extending radially toward the switch center O. In these cases, the sides of the rotation stoppers 33 and 34 are single-tapered.
- both side surfaces of the abutment portions 22 and 23 were formed in a double tapered shape, but only one side surface of the abutment portion 22 may be formed in a tapered shape, and the other side surface of the abutment portion 22 may be a surface extending in a radial direction toward the switch center O, and similarly, only one side surface of the abutment portion 23 may be formed in a tapered shape, and the other side surface of the abutment portion 23 may be a surface extending in a radial direction toward the switch center O. In these cases, the sides of the abutment portions 22 and 23 will be single tapered.
- two rotation stoppers 33, 34 are provided in the circumferential direction, and two abutment portions 22, 23 are provided in the circumferential direction between each of the rotation stoppers 33, 34 adjacent in the circumferential direction, but the number of rotation stoppers and abutment portions is not limited to two and may be three or more.
- the emergency stop switch to which the present invention is applied is provided in various controllers, such as machinery and equipment used in factories, its control devices, and teaching devices connected to the control devices, and when the emergency stop switch is operated, the machinery and equipment is brought to an emergency stop.
- the present invention is useful for emergency stop switches, and is particularly suited to structures that improve stability when the contacts are connected or disconnected.
Landscapes
- Push-Button Switches (AREA)
Abstract
Description
図1ないし図7は、本発明の一実施例による非常停止スイッチを説明するための図であって、図1は非常停止スイッチの外観図、図2ないし図7は非常停止スイッチの内部構造図である。
図8は、非常停止スイッチ(図1)の横断面を上方(押しボタン側)から見た平面図、図9はその斜視図である。
押しボタン2は、図13ないし図15に示すように、当該押しボタン2の外周面を構成する円筒面を有し、下方(図13紙面奥側)に開口する外側円筒部20と、その半径方向内方において外側円筒部20との間に所定の距離を隔てて外側円筒部20と同心に配置され、同様に下方に開口する内側円筒部21とを有している。内側円筒部21の外周面には、半径方向外方に突出する一対の当接部22、23が一体に連設されている。各当接部22、23は、内側円筒部21の外周面上で相対する位置に(つまり、外周上に等間隔で)配置されている。当接部22の左右の側面は、本体部3の回転止め(後述)に当接し得る当接面22a、22bを構成しており、同様に、当接部23の左右の側面は、本体部3の回転止め(後述)に当接し得る当接面23a、23bを構成している。
上述した実施例はあらゆる点で本発明の単なる例示としてのみみなされるべきものであって、限定的なものではない。本発明が関連する分野の当業者は、本明細書中に明示の記載はなくても、上述の教示内容を考慮するとき、本発明の精神および本質的な特徴部分から外れることなく、本発明の原理を採用する種々の変形例やその他の実施例を構築し得る。
2: 押しボタン
22、23: 当接部
22a、22b、23a、23b: 当接面
3: 本体部
33、34: 回転止め
33a、33b、34a、34b: 規制面
5c: 固定接点(接点)
11: 軸部
11a1、11b1: 被係合面
12、13: 第1保持部材
12A、13A: 係合部材
12a1、13a1: 係合面
12B、13B: ばね(付勢部材)
14、14’、14”: 開離付勢ばね
31、32: 第2保持部材
31a、32a: 内周面
C1~C3: 可動接点(接点)
O: スイッチ中心
R: 半径方向の距離
CC: 接点円
Claims (11)
- 非常停止スイッチにおいて、
スイッチ中心から半径方向の距離を隔てて配置された複数の接点を開離方向に付勢する複数の開離付勢ばねを有し、
前記各開離付勢ばねが、前記各接点の半径方向外側に配置されている、
ことを特徴とする非常停止スイッチ。 - 請求項1において、
前記スイッチ中心を中心として前記各接点を通る接点円を描くとき、前記各開離付勢ばねが前記接点円の外側に配置されている、
ことを特徴とする非常停止スイッチ。 - 請求項1において、
前記各開離付勢ばねが、円周上に実質的に等間隔で配置されている、
ことを特徴とする非常停止スイッチ。 - 請求項1において、
前記接点が、複数の固定接点と、これらにそれぞれ対応する複数の可動接点とから構成されており、前記各開離付勢ばねが、前記各可動接点を対応する前記各固定接点から開離する方向に付勢している、
ことを特徴とする非常停止スイッチ。 - 請求項1において、
押しボタンを備え、前記押しボタンの操作により移動可能な軸部を有しており、前記軸部の周囲には、前記押しボタンを押込み操作前位置で保持するための一対の第1保持部材が前記軸部を挟んで対向配置されるとともに、前記各第1保持部材の配設方向と交差する方向において前記軸部を外周側から保持する一対の第2保持部材が前記軸部を挟んで対向配置されている、
ことを特徴とする非常停止スイッチ。 - 請求項5において、
前記第1保持部材が、前記軸部の外周に形成された被係合面と係脱可能に係合する係合面を有する係合部材と、前記係合部材を前記軸部の側に付勢する付勢部材とから構成されている、
ことを特徴とする非常停止スイッチ。 - 請求項5において、
前記第2保持部材が、前記軸部の外周に沿って周方向に延びる内周面を有している、
ことを特徴とする非常停止スイッチ。 - 請求項1において、
押しボタンと、これを回転可能に保持する本体部とを備え、前記本体部には、前記押しボタンの回転を規制するための規制面を有する回転止めが設けられ、前記押しボタンには、前記回転止めの前記規制面に当接し得る当接面を有する当接部が設けられており、
前記回転止めが半径方向内方に突出しかつ前記規制面が外周側に向かうに従い先細のテーパー状となるテーパー面を有するとともに、前記当接部が半径方向外方に突出しかつ前記当接面が内周側に向かうに従い先細のテーパー状となるテーパー面を有しており、または、
前記回転止めが半径方向外方に突出しかつ前記規制面が内周側に向かうに従い先細のテーパー状となるテーパー面を有するとともに、前記当接部が半径方向内方に突出しかつ前記当接面が外周側に向かうに従い先細のテーパー状となるテーパー面を有している、
ことを特徴とする非常停止スイッチ。 - 請求項8において、
前記規制面が前記回転止めの両側面に配置されており、当該両側面が両テーパー状になっているとともに、前記当接面が前記当接部の両側面に配置されており、当該両側面が両テーパー状になっている、
ことを特徴とする非常停止スイッチ。 - 請求項8において、
前記回転止めが周方向に複数配置されており、前記当接部が、周方向に隣り合う前記各回転止めの間において周方向に複数配置されている、
ことを特徴とする非常停止スイッチ。 - 請求項1に記載の非常停止スイッチを備えたコントローラ。
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CN202380072768.7A CN120051845A (zh) | 2022-10-15 | 2023-08-18 | 紧急停止开关以及具备紧急停止开关的控制器 |
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JP2022-165921 | 2022-10-15 | ||
JP2022165921A JP2024058506A (ja) | 2022-10-15 | 2022-10-15 | 非常停止スイッチおよびこれを備えたコントローラ |
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CN (1) | CN120051845A (ja) |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006019137A (ja) * | 2004-07-01 | 2006-01-19 | Alps Electric Co Ltd | スイッチ装置 |
JP3899281B2 (ja) | 2002-04-11 | 2007-03-28 | Idec株式会社 | 押ボタンスイッチ |
JP2010211976A (ja) * | 2009-03-09 | 2010-09-24 | Niles Co Ltd | プッシュスイッチ |
JP5059594B2 (ja) | 2007-12-28 | 2012-10-24 | Idec株式会社 | スイッチ |
JP2020035672A (ja) * | 2018-08-30 | 2020-03-05 | Idec株式会社 | 操作スイッチユニットおよび非常停止スイッチユニット |
JP7042136B2 (ja) | 2018-03-29 | 2022-03-25 | Nkkスイッチズ株式会社 | 押ボタンスイッチの製造方法 |
-
2022
- 2022-10-15 JP JP2022165921A patent/JP2024058506A/ja active Pending
-
2023
- 2023-08-02 TW TW112129027A patent/TW202431300A/zh unknown
- 2023-08-18 CN CN202380072768.7A patent/CN120051845A/zh active Pending
- 2023-08-18 WO PCT/JP2023/029837 patent/WO2024079988A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3899281B2 (ja) | 2002-04-11 | 2007-03-28 | Idec株式会社 | 押ボタンスイッチ |
JP2006019137A (ja) * | 2004-07-01 | 2006-01-19 | Alps Electric Co Ltd | スイッチ装置 |
JP5059594B2 (ja) | 2007-12-28 | 2012-10-24 | Idec株式会社 | スイッチ |
JP2010211976A (ja) * | 2009-03-09 | 2010-09-24 | Niles Co Ltd | プッシュスイッチ |
JP7042136B2 (ja) | 2018-03-29 | 2022-03-25 | Nkkスイッチズ株式会社 | 押ボタンスイッチの製造方法 |
JP2020035672A (ja) * | 2018-08-30 | 2020-03-05 | Idec株式会社 | 操作スイッチユニットおよび非常停止スイッチユニット |
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CN120051845A (zh) | 2025-05-27 |
JP2024058506A (ja) | 2024-04-25 |
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