JP2011159401A - Safety holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety holder which can be attached to a safety switch for integration therewith, and of clogging up insertion ports for an actuator with one-touch control. <P>SOLUTION: The safety switch 1 is constituted of a switch body 2 and the actuator 3. The switch body 2 is constructed of an operation head part and a switch part. The operation head part has actuator insertion ports 7, 8 provided therein. The safety holder 20 that prevents wrong insertion of the actuator 3 is mounted on the switch body 2, while having a base body 21 that includes holes H1 for mounting a locking member, and a movable body 22 movably mounted on the base body 21, which is movable across a first position that opens the actuator insertion ports and a second position that clogs up the actuator insertion ports while having holes H2 for mounting a locking member. If the movable body 22 reaches the second position by the moving operation thereof, a state where the holes H1 of the base body 21 for mounting the locking member and the holes H2 of the movable body 22 for mounting the locking member are brought to be overlapped is achieved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a safety holder used in a safety switch that is attached to a wall surface of an entrance or the like of a room where an industrial machine is installed and stops the power supply to the industrial machine or the like when the door of the entrance is opened. More specifically, the present invention relates to a safety holder that is attached to a safety switch in a state where the door of the entrance / exit is opened, and prevents rotation of a drive cam and insertion of an actuator in the safety switch.

  In the danger zone of the room where the industrial machine is installed, the factory, or the industrial machine itself, the doors of the entrance of the room or the danger zone are completely installed in order to prevent the trouble that the operator gets caught in the machine and is injured. When it is not closed, it is required to provide a system for locking the drive of the machine, and a safety switch (see Patent Document 1 below) has been proposed to meet such a requirement. This safety switch is mounted on the wall around the entrance of the room, and when the dedicated actuator fixed to the door is inserted from the insertion port of the switch body when the door of the entrance is closed, The drive cam rotates, and the operating rod moves according to the rotation of the drive cam to switch the contact connection state, and the circuit connection is the main circuit (industrial machine) The machine in the room is ready for operation.

  By the way, such a safety switch can be used when another worker who does not know the situation closes the door when an operator enters the room while the machine is stopped. If the machine is activated, there is a risk that workers in the room may be in danger.

  Therefore, in order to prevent such a situation, the applicant of the present invention engages one actuator insertion port of the actuator insertion ports provided on two different surfaces to block the actuator insertion port, and one of the substrates. In the state where it is engaged with the actuator insertion port, the actuator insertion port provided on the two different surfaces is engaged with the other actuator insertion port and moved to the base so that the actuator insertion port can be closed. There has already been proposed a safety holder provided with a slide body that can be attached (see Patent Document 1 below).

JP 2007-73229 A

However, the conventional safety holder has the following problems.
Since the safety holder is not integrated with the safety switch, it must be connected with a string or the like when not in use. Also, when the string is cut or not connected with a string or the like, it may be lost. In addition, in order to attach the safety retainer to the actuator insertion slot, it is necessary to pull back the slide body, hook it onto the safety switch, and push the slide body a total of three times, and gloves are used at the factory. It is difficult for the operator to install.

  The present invention has been conceived in view of the above circumstances, and an object of the present invention is to provide a safety holder that is attached to and integrated with a safety switch and that can close an actuator insertion port by a one-touch operation. That is.

  In order to achieve the above object, the invention according to claim 1 of the present invention is an operation head portion provided with an actuator insertion opening into which an actuator is inserted, and provided with a drive cam that rotates by insertion of the actuator. And a safety switch that is connected to the operation head part and includes a switch part that has a contact that switches the connection according to the rotation of the drive cam, and is used to prevent erroneous insertion of the actuator. A holder, which is attached to the safety switch and has a locking member mounting hole, a locking member mounting hole, a first position where the actuator insertion port is opened, and a first position for closing the actuator insertion port. A movable body attached to the base body so as to be movable over two positions, and the movable body reaches the second position by a movement operation of the movable body. When, it features that the state in which the locking member mounting hole overlaps the locking member mounting holes and the movable body of the substrate appears.

  With the above configuration, the safety holder is integrated with the safety switch and does not need to be connected with a string or the like as in the conventional example. As a result, it is possible to solve problems such as the possibility of losing when the string in the conventional example is broken or when the string is not connected with the string. In addition, the actuator insertion port can be closed by a one-touch operation of moving the movable body.

  The invention according to claim 2 is the safety holder according to claim 1, wherein the first screw for fixing the operation head portion to the switch portion or the safety switch is fixed to a predetermined mounting surface. The base is attached to the safety switch by using a second screw for the purpose.

  As described above, by using the screw provided in the safety switch, the safety holder can be easily attached to the safety switch at low cost without using any special fixing means.

  The invention according to claim 3 is the safety holder according to claim 2, wherein when the movable body reaches the second position, the first screw for fixing the operation head portion to the switch portion is provided. Desorption is impossible.

  With the above configuration, when the movable body is in the second position, the first screw cannot be loosened to remove the safety holder from the safety switch. Therefore, the state where the actuator insertion port is closed can be maintained, and safety is improved.

  Moreover, this invention of Claim 4 is a safety holder in any one of Claims 1-3, Comprising: The said switch part has a lid | cover which opens or closes or removes when wiring to a switch part, At least a part of the base is in a state of covering at least a part of the lid.

  An operator may attempt to invalidate the safety switch by opening the lid and short-circuiting the internal contact to make it conductive. Such an action is essentially prohibited from the viewpoint of safety of the safety switch. However, an operator may perform the above-mentioned action for convenience. Therefore, by adopting a configuration in which the lid cannot be opened by the safety holder, the above action can be prevented and safety can be ensured.

  Moreover, this invention of Claim 5 is the safety holder of Claim 4, Comprising: The attachment to the safety switch of the said base | substrate is after the safety switch was installed in the predetermined | prescribed mounting surface. And

  Further, the present invention according to claim 6 is the safety holder according to claim 5, wherein the safety switch is a safety switch having a structure in which a contact is turned off when the operation head portion is separated from the switch portion. The base is attached to the safety switch using one screw.

  When the safety switch is installed on the mounting surface and the safety switch has a structure in which the contact is turned on when the operation head is separated from the switch, safety is maintained using the first screw. When the tool is attached to the safety switch, if the operation head part is separated from the switch part, the contact is turned on, which is dangerous. However, in the case of a safety switch having a structure in which the contact is turned off when the operation head part is separated from the switch part, there is no danger and no problem even if it is attached using the first screw. On the other hand, in the case of a safety switch having a structure in which the contact is turned on when the operation head part is separated from the switch part, it is conceivable to attach it using the second screw. However, when the second screw is used, It is necessary to loosen the screw once and then re-tighten it, which may cause a position shift of the safety switch. On the other hand, such a problem does not occur when mounting using the first screw.

  Moreover, this invention of Claim 7 is a safety holder of Claim 5, Comprising: The said safety switch is a safety switch of a structure which a contact turns ON, if an operation head part is separated from a switch part, The said 1st The base is attached to the safety switch using two screws.

  In the case of a safety switch having a structure in which the contact is turned on when the operation head is separated from the switch, the operation head is separated from the switch when the first switch is used for mounting, which is dangerous. Therefore, danger can be avoided and safety can be ensured by using the second screw.

  According to the present invention, the safety holder is integrated with the safety switch and does not need to be connected with a string or the like as in the conventional example. As a result, it is possible to solve problems such as the possibility of losing when the string in the conventional example is broken or when the string is not connected with the string. In addition, the actuator insertion port can be closed by a one-touch operation of moving the movable body.

The figure which shows the use condition of the safety switch in which the safety holder which concerns on this invention is used. The top view of the safety switch where the safety holder concerning the present invention is used. The front view of the safety switch with which the safety holder concerning this invention is used. AA arrow sectional drawing of FIG. BB arrow sectional drawing of FIG. The figure which shows simply the internal structure of the safety switch in which the safety holder concerning this invention is used. FIG. 3 is a perspective view of a switch main body (a state where the actuator insertion port 7 is opened) to which the safety holder according to the first embodiment is attached. The front view of FIG. The top view of FIG. The left view of FIG. The perspective view of the switch main body (state which the actuator insertion port 7 is block | closed) to which the safety holder which concerns on Embodiment 1 was attached. The front view of FIG. The top view of FIG. The left view of FIG. The front view of the base | substrate which is a component of a safety holder. The top view of the base | substrate which is a component of a safety holder. The bottom view of the base | substrate which is a component of a safety holder. The right view of the base | substrate which is a component of a safety holder. The left view of the base | substrate which is a component of a safety holder. The front view of the movable body which is a component of a safety holder. The top view of the movable body which is a component of a safety holder. The bottom view of the movable body which is a component of a safety holder. The right view of the movable body which is a component of a safety holder. The left view of the movable body which is a component of a safety holder. The figure which shows simply the internal structure of 1 A of safety switches. The figure which shows simply the internal structure of 1 A of safety switches seen from the side surface of FIG. The figure which shows simply the internal structure of 1 A of safety switches. The figure which shows simply the internal structure of 1 A of safety switches seen from the side surface of FIG. The perspective view of the switch main body (state in which the actuator insertion port 8 is open | released) to which the safety holder which concerns on Embodiment 2 was attached. The perspective view of the switch main body (state which the actuator insertion port 8 is obstruct | occluded) to which the safety holder which concerns on Embodiment 2 was attached. The front view of the switch main body (state in which the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 3 was attached. The side view of the switch main body (state in which the actuator insertion port 8 was open | released) to which the safety holder concerning Embodiment 3 was attached. The front view of the switch main body (state which the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 3 was attached. The side view of the switch main body (state which the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 3 was attached. The front view of the switch main body (state in which the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 4 was attached. The side view of the switch main body (state which the actuator insertion port 8 was open | released) to which the safety holder concerning Embodiment 4 was attached. The front view of the switch main body (state in which the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 4 was attached. The side view of the switch main body (state which the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 4 was attached. The front view of the switch main body (state in which the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 5 was attached. The side view of the switch main body (state in which the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 5 was attached. The front view of the switch main body (state which the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 5 was attached. The side view of the switch main body (The state where the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 5 was attached. The front view of the switch main body (state in which the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 6 was attached. The side view of the switch main body (state in which the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 6 was attached. The front view of the switch main body (state which the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 6 was attached. The side view of the switch main body (The state where the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 6 was attached. The front view of the switch main body (state where the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 7 was attached. The side view of the switch main body (state in which the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 7 was attached. The front view of the switch main body (state which the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 7 was attached. The side view of the switch main body (The state where the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 7 was attached. The front view of the switch main body (the state where the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 8 was attached. The side view of the switch main body (state in which the actuator insertion port 8 was open | released) to which the safety holder concerning Embodiment 8 was attached. The front view of the switch main body (state in which the actuator insertion port 8 was obstruct | occluded) to which the safety holder which concerns on Embodiment 8 was attached. The side view of the switch main body (state which the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 8 was attached. The front view of the switch main body (The state where the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 9 was attached. The side view of the switch main body (state in which the actuator insertion port 8 was open | released) to which the safety holder which concerns on Embodiment 9 was attached. The front view of the switch main body (state which the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 9 was attached. The side view of the switch main body (The state where the actuator insertion port 8 was block | closed) to which the safety holder which concerns on Embodiment 9 was attached.

  Hereinafter, the present invention will be described in detail based on embodiments. Note that the present invention is not limited to the following embodiments.

[Embodiment 1]
First, a schematic structure of a safety switch to which a safety holder according to the present invention is attached will be described with reference to FIGS. 1 to 6, and then a configuration of the safety holder according to the present invention will be described.

(Schematic structure of safety switch)
As shown in FIG. 1, the safety switch 1 is a switch that is electrically connected to an industrial machine installed in a room, and mainly includes a switch body 2 and an actuator 3. The switch body 2 is fixed to the peripheral wall surface of the entrance / exit of the room, and the actuator 3 is fixed to the door 4.

  The switch body 2 includes an operation head portion 5 into which the actuator 3 is inserted and a switch portion 6 in which a contact block (not shown) is built. The operation head unit 5 and the switch unit 6 are detachably coupled by first fixing screws 100 arranged at four corners on the upper surface of the operation head unit 5. Further, the operation head unit 5 is provided with actuator insertion ports 7 and 8 on two different surfaces so that the actuator insertion direction can be selected according to the situation of the installation location. Therefore, since the operation head unit 5 and the switch unit 6 are detachably coupled in this way and the actuator insertion ports 7 and 8 are provided on two different surfaces, the operation head unit 5 is moved to 90. By coupling to the switch unit 6 at each position rotated every degree, eight modes with different arrangements of the actuator insertion ports 7 and 8 are obtained. Accordingly, the safety switch can be installed by appropriately selecting any one of the eight actuator insertion modes according to the situation of the installation location.

  Further, the switch portion 6 is formed with two through holes (not shown) penetrating from the front side to the back side. When the switch body 2 is attached to a predetermined mounting surface, It can be fixed by inserting a second fixing screw 102 and screwing it onto a predetermined mounting surface.

  Further, the operation head portion 5 is provided with a drive cam 9 as clearly shown in FIG. The drive cam 9 is provided to displace the operation rod 10 of a contact opening / closing mechanism (see FIG. 6) composed of a movable contact 200a and a fixed contact 200b built in the switch unit 6, and is rotatably supported by the camshaft 11. ing. The operating rod 10 is biased upward by a coil spring 201 (see FIG. 6). On the outer peripheral surface of the drive cam 9, rectangular recesses 12 and 13 are formed corresponding to the actuator insertion ports 7 and 8.

  The lid 105 constituting the front portion of the switch unit 6 can be opened and closed, and the lid 105 can be fixed to the switch unit 6 with a third screw 103.

  In the safety switch having the above structure, as shown in FIG. 6B, when the actuator 3 enters the inside of the operation head portion 5 through the actuator insertion port 7, the pressing piece 3a of the actuator 3 (see FIG. 1A). When the drive cam 9 hits the drive cam 9, the drive cam 9 rotates, and the operation rod 10 of the switch unit 6 moves to the drive cam 9 side of the operation head unit 5 in accordance with the rotation of the drive cam 9. When the actuator 3 advances to the insertion end, the connection contact of the contact block is switched, and the machine in the room can be driven, and the pressing piece 3a of the actuator 3 is the recess 12 of the drive cam 9 (see FIG. 4). ).

  Next, when the actuator 3 is extracted from this state, the drive cam 9 rotates in the opposite direction to that described above due to the retraction of the actuator 3, and accordingly, the operation rod 10 moves to the connection contact side of the switch unit 6. (See FIG. 6 (A)), the connection contact is switched, and the power supply to the machine is turned off.

  When the actuator 3 enters the inside of the operation head portion 5 through the other actuator insertion port 8 of the operation head portion 5, the pressing piece 3 a of the actuator 3 hits the drive cam 9 and the drive cam 9 rotates. According to the rotation, the operation rod 10 of the switch unit 6 moves to the drive cam 9 side of the operation head unit 5 to switch the connection contact, and the pressing piece 3a of the actuator 3 is the recess 13 of the drive mum 9 (see FIG. 4). ). When the actuator 3 is removed from this state, the drive cam 9 rotates in the opposite direction, and the operating rod 10 moves to the connection contact side of the switch unit 6 to switch the connection contact.

  In the safety switch having the above structure, when the worker enters the room for machine inspection or the like, if the door 4 is opened, the machine is kept in a stopped state, so that the worker's safety is ensured. . However, if the door 4 is accidentally closed, the machine will operate and there is a risk that the operator in the room will be in danger. Therefore, in order to prevent such a situation and ensure the safety of the worker, the safety holder according to the present invention is used. The safety holder according to the present invention is not connected to the switch body 2 with a string or the like as in the conventional example, but is used by being integrally attached to the switch body 2 as described later. It is in.

(Structure of safety holder)
7 is a perspective view of the switch body to which the safety holder according to Embodiment 1 is attached, FIG. 8 is a front view of FIG. 7, FIG. 9 is a plan view of FIG. 7, and FIG. 10 is a left side view of FIG. 11 is a perspective view of the switch body to which the safety holder according to Embodiment 1 is attached, FIG. 12 is a front view of FIG. 11, FIG. 13 is a plan view of FIG. 11, and FIG. 15 is a front view of a base body that is a component of the safety holder, FIG. 16 is a plan view of the base body that is a component of the safety holder, FIG. 17 is a bottom view of the base body that is a component of the safety holder, and FIG. FIG. 19 is a left side view of a base body that is a component of the safety holder, FIG. 20 is a front view of a movable body that is a component of the safety holder, and FIG. 21 is a plan view of a movable body that is a component of the safety holder, and FIG. 22 is a movable that is a component of the safety holder. Bottom view of FIG. 23 is a right side view of the movable member is a component of the safety holder, FIG. 24 is a left side view of the movable member is a component of the safety holder. 7 to 10 show a state where the actuator insertion port 7 is opened by the safety holder, and FIGS. 11 to 14 show a state where the actuator insertion port 7 is blocked by the safety holder.

  The safety holder 20 in the present embodiment is used to use the upper surface, in other words, to close the actuator insertion port 7. Since the actuator insertion port 8 is blocked by the mounting surface, it is not necessary to block the actuator insertion port 8 by the safety holder 20.

  Hereinafter, the configuration of the safety holder according to Embodiment 1 will be described with reference to FIGS. The safety holder 20 is rotated over a base body 21 attached to the switch body 2, a first position where the actuator insertion port 7 shown in FIG. 7 is opened, and a second position where the actuator insertion port 7 shown in FIG. 11 is closed. The movable body 22 is movably attached to the base 21. The base 21 and the movable body 22 are, for example, plate-like metal members. The base body 21 and the movable body 22 may be made of a synthetic resin member having high rigidity.

  The base 21 has an inverted L-shaped main body 21a (see FIG. 18). The main body portion 21 a includes a vertical portion 21 a 1 that covers the lid 105 of the front portion of the switch main body 2 and a horizontal portion 21 a 2 that covers the upper surface portion of the switch main body 2. As described above, the lid 105 is covered with the vertical portion 21 a 1, thereby preventing the operator from opening the lid 105. In other words, the operator may attempt to invalidate the safety switch by opening the lid 105 and short-circuiting the internal contact to make it conductive. Such an action is essentially prohibited from the viewpoint of safety of the safety switch. However, an operator may perform the above-mentioned action for convenience. In the present embodiment, by adopting a configuration in which the lid 105 cannot be opened, the above action can be prevented and safety can be ensured.

  In addition, a pair of flange portions 21b protruding to the front side (X1 direction side in FIG. 7) are provided at both ends of the vertical portion 21a1. An opening 21k (see FIG. 15) is formed on the upper side of the vertical portion 21a1. Note that the opening 21k overlaps the actuator insertion port 8 at the front position of the actuator insertion port 8 when the safety holder 20 described later is used in the front (in the case of the second embodiment), and the actuator 3 is connected to the actuator insertion port 8. Used so that it can be inserted into. In addition, a pair of flange portions 21d protruding upward (X2 direction side in FIG. 7) is provided at both ends of the horizontal portion 21a2. A locking member attachment hole H1 is formed in the flange portion 21d. Further, the horizontal portion 21a2 has an opening 21f (see FIGS. 16 and 17) and an insertion hole 110 (see FIGS. 16 and 17) for the first screw 100.

  The movable body 22 includes a main body portion 22a that is bent in a substantially L shape, a pair of flange portions 22b that are formed by projecting both sides of the upper end portion of the main body portion 22a to the rear side, and Both side parts are provided with a pair of flange parts 22c formed protruding rearward. A locking member attachment hole H2 is formed in the flange portion 22c. Note that the base 21 and the movable body 22 are rotatably coupled by a pin 23.

  When the safety holder 20 having the above-described configuration is attached to the switch body 2 using the first screw 100, the following is performed. That is, screw holes (not shown) for the first screw 100 are formed in advance at the four corners of the upper surface of the operation head unit 5. Of these four screw holes, two screw holes on the front side are formed. The safety holder 20 is placed on the switch body 2 so that the insertion holes 110 (see FIGS. 16 and 17) of the base body 21 are arranged. Next, the safety holder 20 is attached to the switch body 2 by inserting the two first screws 100 into the insertion holes 110 and screwing them into the two screw holes on the front surface side. The screw holes used for attaching the safety holder 20 to the switch body 2 are not limited to the two screw holes on the front side as described above. Any two of the four screw holes may be used. Further, any three screw holes may be used, and further four screw holes may be used. Of course, it is necessary to form the insertion hole 110 in the base 21 corresponding to the screw hole to be used.

  Next, a method of using the safety holder 20 attached to the switch body 2 will be described. When the safety holder 20 is not used, the movable body 22 is in the first position where the actuator insertion port 7 is opened as shown in FIG. In this state, the opening 21f and the actuator insertion port 7 are exactly overlapped, and the actuator 3 can be inserted into the actuator insertion port 7. On the other hand, when the safety holder 20 is used, the movable body 22 is rotated and moved to the second position shown in FIG. In the second position shown in FIG. 11, the opening 21 f is closed by the movable body 22. That is, the actuator insertion port 7 is closed by the movable body 22. When the movable body 22 reaches the second position, a state in which the locking member mounting hole H1 and the locking member mounting hole H2 are exactly overlapped appears, so that the padlocks are formed in the locking member mounting holes H1 and H2. (Equivalent to the locking member) can be locked. Therefore, it is possible to prevent the actuator 3 from being erroneously inserted into the actuator insertion port 7 and to ensure the safety of the operator.

  When the movable body 22 reaches the second position, the first screw 100 is covered with the movable body 22 as shown in FIG. For this reason, the safety holder 20 cannot be removed from the switch body 2 by loosening the first screw 100. Therefore, the state where the actuator insertion port 7 is closed can be maintained, and safety is improved.

(Attachment mode of the safety holder to the switch body)
There are two modes for attaching the safety holder 20 to the switch body 2, that is, an existing state in which the switch body 2 is installed on the mounting surface, and a case before the installation. However, these two attachment modes may be restricted depending on the type of the safety switch. Hereinafter, this point will be described. There are two types of safety switches: a safety switch having a structure in which the contact is turned off when the operation head part 5 is separated from the switch part 6, and a safety switch having a structure in which the contact is turned on when the operation head part is separated from the switch part. . The safety switch 1 shown in FIGS. 1 to 6 corresponds to the latter safety switch. This is because, when the operation head unit 5 is separated from the switch unit 6, the operation rod 10 is moved upward by the urging force of the coil spring 201, so that the movable contact 200a comes into contact with the fixed contact 200b and the contact is turned on. is there.

  On the other hand, the schematic structure of the former safety switch is shown in FIGS. In the safety switch 1A, the movable contact 200a is urged in the opening direction by the coil spring 201 with respect to the fixed contact 200b. Then, due to the rotation of the drive cam 9 accompanying the insertion of the actuator 3, the connecting portion 30 moves along the guide groove 31 against the urging force of the coil spring 201, so that the operation rod 10 moves, and the movable contact 200 a The contact is brought into the ON state upon contact with the fixed contact 200b. Therefore, in the case of the safety switch 1A having such a structure, the operation rod 10 is urged downward by the coil spring 201 and the movable contact 200a is urged in the opening direction with respect to the fixed contact 200b. Even when the head unit 5 is separated from the switch unit 6, the contact OFF state in which the movable contact 200a is separated from the fixed contact 200b is maintained.

  Therefore, when the safety holder is attached to the switch body using the first screw 100 for the safety switch 1 having a structure in which the contact is turned on when the operation head unit 5 is separated from the switch unit 6, the operation head unit 5 Is required to be separated from the switch unit 6, and the contact is turned on, which is dangerous. Therefore, when the switch body 2 is connected to the machine by wiring, it is necessary to consider whether or not the contact is turned on.

  On the other hand, when a safety holder is attached to the switch body using the first screw 100 for the safety switch 1A having a structure in which the contact is turned off when the operation head unit 5 is separated from the switch unit 6, Even if the head unit 5 is separated from the switch unit 6, the contact is turned off, which is not dangerous. Therefore, it is not necessary to consider whether or not the switch body 2 is wired to the machine.

  As described above, when the safety holder is attached to the switch body using the first screw 100, the attachment mode may be restricted depending on the type of the safety switch.

  In addition, in the case of the safety switch 1 having a structure in which the contact is turned on when the operation head unit 5 is separated from the switch unit 6, in order to attach the safety holder to the switch body in the existing state where the switch body is installed on the mounting surface, The second screw 102 is used. That is, for the sake of safety, a method of separating the operation head portion and the switch portion cannot be adopted, and therefore, a method of attaching the safety holder to the switch body using the second screw 102 without separation is adopted. . This point will be described in detail in Embodiments 8 and 9 to be described later.

[Embodiment 2]
29 and 30 are perspective views of the switch body to which the safety holder according to the second embodiment is attached. FIG. 29 shows a state in which the actuator insertion port 8 is opened by the safety holder. The state where the actuator insertion port 8 is blocked by the safety holder is shown. The safety holder in the present embodiment is the same as the safety holder in the first embodiment. In the first embodiment, the safety holder 20 is used to use the upper surface, in other words, to close the actuator insertion port 7. In the second embodiment, the safety holder 20 is used to block the actuator insertion port 8. . The actuator insertion port 7 is closed by the base 21 of the safety holder 20.

  In the second embodiment, the safety holder 20 is attached to the switch body 2 so that the opening 21k of the base body 21 and the actuator insertion port 8 overlap each other. Thereby, it is used so that the actuator 3 can be inserted in the actuator insertion port 8.

  Next, a method of using the safety holder 20 will be described. When the safety holder 20 is not used, the movable body 22 is in the first position where the actuator insertion opening 8 is opened, as shown in FIG. In this state, the opening 21k and the actuator insertion port 8 are exactly overlapped, and the actuator 3 can be inserted into the actuator insertion port 8. On the other hand, when the safety holder 20 is used, the movable body 22 is rotated and moved to the second position shown in FIG. In the second position shown in FIG. 30, the opening 21 k is closed by the movable body 22. That is, the actuator insertion port 8 is closed by the movable body 22. When the movable body 22 reaches the second position, as shown in FIG. 30, a state in which the locking member mounting hole H1 and the locking member mounting hole H2 are exactly overlapped appears. It becomes possible to lock the padlocks in the holes H1, H2. Therefore, it is possible to prevent the actuator 3 from being erroneously inserted into the actuator insertion port 8 and to ensure the safety of the operator.

[Embodiment 3]
FIG. 31 is a front view of the switch body (with the actuator insertion port 8 opened) to which the safety holder according to the third embodiment is attached, and FIG. 32 is a switch to which the safety holder according to the third embodiment is attached. FIG. 33 is a front view of the main body (in a state where the actuator insertion port 8 is opened), and FIG. 33 is a front view of the switch main body (in a state where the actuator insertion port 8 is closed) to which the safety holder according to Embodiment 3 is attached. FIG. 34 is a side view of the switch body (actuator insertion port 8 is closed) to which the safety holder according to Embodiment 3 is attached.

  The safety holder 20A according to the third embodiment is characterized in that the movable body 22A is movable in the vertical direction. Hereinafter, the configuration of the safety holder 20A will be specifically described. The base body 21A according to the third embodiment includes an L-shaped portion 40, a pair of arm portions 41, and a portion 42 extending from the side portion side to the front portion side of the switch body 2. . A locking member mounting hole H <b> 1 is formed at the distal end portion of the arm portion 41. A guide protrusion 43 is formed on the front side of the portion 42. On the other hand, the movable body 22 </ b> A according to the third embodiment includes a main body 44 and flanges 45 formed on both sides of the main body 44. The flange portion 45 is formed with a locking member mounting hole H2. A guide hole 46 extending in the vertical direction is formed in the main body 44. The guide protrusion 43 is fitted into the guide hole 46, and the movable body 22A is attached to the base 21A so as to be movable in the vertical direction. Note that the safety holder 20A is attached to the switch body 2 using the first screw 100, as in the first embodiment.

  In the safety holder 20A configured as described above, when the safety holder is not used, the movable body 22A is in the first position where the actuator insertion port 8 is opened, as shown in FIGS. Therefore, the actuator 3 can be inserted into the actuator insertion port 8. On the other hand, when the safety holder 20A is used, the movable body 22A is moved upward and moved to the second position shown in FIGS. In the second position shown in FIGS. 33 and 34, the actuator insertion port 8 is closed by the movable body 22A. Then, in the state where the movable body 22A has reached the second position, as shown in FIGS. 33 and 34, a state where the locking member mounting hole H1 and the locking member mounting hole H2 are exactly overlapped appears. It becomes possible to lock the padlocks in the locking member mounting holes H1, H2. Therefore, it is possible to prevent the actuator 3 from being erroneously inserted into the actuator insertion port 8 and to ensure the safety of the operator.

[Embodiment 4]
FIG. 35 is a front view of a switch body (with the actuator insertion opening 8 opened) to which the safety holder according to the fourth embodiment is attached, and FIG. 36 is a switch to which the safety holder according to the fourth embodiment is attached. 37 is a side view of the main body (in a state where the actuator insertion port 8 is opened), and FIG. 37 is a front view of the switch main body (in a state where the actuator insertion port 8 is closed) to which the safety holder according to the fourth embodiment is attached. FIG. 38 is a side view of the switch body (actuator insertion port 8 is closed) to which the safety holder according to the fourth embodiment is attached.

  The safety holder 20B according to the fourth embodiment is characterized in that the movable body 22B is movable in the vertical direction by using a spring. The safety holder 20B according to the fourth embodiment is vertically moved over a base body 21B attached to the switch body 2, a first position where the actuator insertion port 8 is opened, and a second position where the actuator insertion port 8 is closed. The movable body 22B is movably attached to the base body 21B. The base 21 </ b> B includes a portion 50 that covers the upper surface of the switch body 2, a front portion 51 that covers the front surface of the switch body 2, and the like. A locking member mounting hole H1 is formed in the front side vertical portion 50a of the portion 50. The front portion 51 is formed with a guide hole 52 that opens upward. The movable body 22B is a plate-like body, and a locking member mounting hole H2 is formed on the upper side thereof. The movable body 22 </ b> B is inserted into the guide hole 52, and a lower end portion thereof is connected to a spring 53 disposed in the guide hole 52. The movable body 22B is biased upward by the spring 53.

  In the safety holder 20B having the above-described configuration, the movable body 22B is normally biased upward and is present at the second position shown in FIGS. Therefore, the actuator insertion port 8 is closed. And in this state, since the state where the locking member mounting hole H1 and the locking member mounting hole H2 are exactly overlapped appears, it is possible to lock the padlocks in the locking member mounting holes H1 and H2. It becomes. Therefore, it is possible to prevent the actuator 3 from being erroneously inserted into the actuator insertion port 8 and to ensure the safety of the operator.

  When inserting the actuator 3 into the actuator insertion port 8, the movable body 22B is moved downward to open the actuator insertion port 8, as shown in FIGS.

  When the actuator 3 is pulled out from the actuator insertion port 8, the movable body 22B moves upward by the biasing force of the spring 53, and the actuator insertion port 8 is closed as shown in FIGS. . In this manner, when the actuator 3 is pulled out, the actuator insertion port 8 is automatically closed, and safety is improved.

[Embodiment 5]
FIG. 39 is a front view of a switch body (a state where the actuator insertion port 8 is opened) to which the safety holder according to the fifth embodiment is attached, and FIG. 40 is a switch to which the safety holder according to the fifth embodiment is attached. 41 is a side view of the main body (in a state where the actuator insertion port 8 is opened), and FIG. 41 is a front view of the switch main body (in a state where the actuator insertion port 8 is closed) to which the safety holder according to the fifth embodiment is attached. 42 is a side view of the switch body (actuator insertion port 8 is closed) to which the safety holder according to Embodiment 5 is attached. FIG.

  The safety holder 20C according to the fifth embodiment is vertically moved over a base 21C attached to the switch body 2, a first position where the actuator insertion port 8 is opened, and a second position where the actuator insertion port 8 is closed. The movable body 22C is movably attached to the base 21C. The base body 21 </ b> C includes an upper surface portion 55 attached to the upper surface of the switch body 2, a front surface portion 56 that covers the front surface portion of the switch body 2, and a standing portion 57 that is erected on the upper surface portion 55. An opening 21k is formed in the front surface portion 56. The standing portion 57 is formed with a locking member mounting hole H1 (see FIG. 40). A guide protrusion 58 is formed on the standing portion 57. The movable body 22 </ b> C includes a first vertical part 59, a horizontal part 60, and a second vertical part 61. The first vertical portion 59 is formed with a locking member mounting hole H2. Further, the first vertical portion 59 is formed with a guide hole 62 extending in the vertical direction. A guide projection 58 is fitted into the guide hole 62, and the movable body 22C is attached to the base 21C so as to be movable in the vertical direction. Note that the safety holder 20C is attached to the switch body 2 using the first screw 100 as in the first embodiment.

  In the safety holder 20C having the above-described configuration, the movable body 22C is normally present at the second position shown in FIGS. 41 and 42 by its own weight. Therefore, the actuator insertion port 8 is closed. And in this state, since the state where the locking member mounting hole H1 and the locking member mounting hole H2 are exactly overlapped appears, it is possible to lock the padlocks in the locking member mounting holes H1 and H2. It becomes. Therefore, it is possible to prevent the actuator 3 from being erroneously inserted into the actuator insertion port 8 and to ensure the safety of the operator.

  When the actuator 3 is inserted into the actuator insertion port 8, the movable body 22C is moved upward to open the actuator insertion port 8, as shown in FIGS.

  When the actuator 3 is pulled out from the actuator insertion port 8, the movable body 22C moves downward under its own weight, and the actuator insertion port 8 is closed as shown in FIGS. In this manner, when the actuator 3 is pulled out, the actuator insertion port 8 is automatically closed, and safety is improved.

[Embodiment 6]
FIG. 43 is a front view of a switch body (with the actuator insertion port 8 opened) to which the safety holder according to the sixth embodiment is attached, and FIG. 44 is a switch to which the safety holder according to the sixth embodiment is attached. 45 is a side view of the main body (in a state where the actuator insertion port 8 is opened), and FIG. 45 is a front view of the switch main body (in a state where the actuator insertion port 8 is closed) to which the safety holder according to the sixth embodiment is attached. 46 is a side view of the switch body (actuator insertion port 8 is closed) to which the safety holder according to the sixth embodiment is attached. 43 and 45, the through hole 101 into which the second screw 102 is inserted is drawn, but the second screw 102 is omitted.

  The safety holder 20D according to the sixth embodiment is vertically moved over a base body 21D attached to the switch body 2, a first position where the actuator insertion port 8 is opened, and a second position where the actuator insertion port 8 is closed. The movable body 22D is rotatably attached to the base 21D (see FIG. 44). The base 21D includes a main body portion 66 that covers the upper surface of the switch main body 2, a standing portion 67 having a locking member attachment hole H1, and the like. The movable body 22 </ b> D is formed in a substantially U shape in a side view in FIG. 44, and includes a pair of side parts 68 and a front part 69 that connects the side parts 68. The movable body 22D is rotatably attached to the base body 21D by a pin 90.

  In the safety holder 20D configured as described above, when the safety holder is not used, the movable body 22D is in the first position where the actuator insertion port 8 is opened as shown in FIGS. Therefore, the actuator 3 can be inserted into the actuator insertion port 8. On the other hand, when the safety holder 20D is used, the movable body 22D is rotated downward and moved to the second position shown in FIGS. 45 and 46, the actuator insertion port 8 is closed by the front surface portion 69 of the movable body 22D. In this state, when the padlock is locked in the locking member mounting hole H1, even if the movable body 22D is rotated upward, the side portion 68 abuts on the locking hook of the padlock and the rotation is restricted. Therefore, the movable body 22D cannot be rotated upward unless the padlock is unlocked. As a result, unless the padlock is unlocked, the actuator 3 cannot be inserted into the actuator insertion port 8, and the safety of the operator is ensured.

[Embodiment 7]
47 is a front view of a switch body (with the actuator insertion port 8 opened) to which the safety holder according to the seventh embodiment is attached, and FIG. 48 is a switch to which the safety holder according to the seventh embodiment is attached. 49 is a side view of the main body (in a state where the actuator insertion port 8 is opened), FIG. 49 is a front view of the switch main body (in a state in which the actuator insertion port 8 is closed) to which the safety holder according to the seventh embodiment is attached. 50 is a side view of a switch body (a state where the actuator insertion port 8 is closed) to which the safety holder according to the seventh embodiment is attached.

  The safety holder 20E according to the seventh embodiment rotates over a base body 21E attached to the switch body 2, a first position where the actuator insertion port 8 is opened, and a second position where the actuator insertion port 8 is closed. The movable body 22E is attached to the base body 21E in a possible manner (see FIG. 47). The base body 21E includes a main body portion 70 that covers the upper surface of the switch body 2, a pair of standing portions 71 having a locking member mounting hole H1, a front surface portion 72 that covers the front portion of the switch body 2, and the like. The movable body 22E includes a plate-like portion 73 and is rotatably attached to the base body 21E by a pin 75. The plate-like portion 73 includes a first portion 73a and a second portion 73b, and the second portion 73b can be bent 90 degrees with respect to the first portion 73a by the hinge portion 74.

  In the safety holder 20E having the above configuration, when the safety holder is not used, the movable body 22E is in the first position where the actuator insertion port 8 is opened as shown in FIGS. Therefore, the actuator 3 can be inserted into the actuator insertion port 8. On the other hand, when the safety holder 20E is used, the movable body 22E is rotated and moved to the second position shown in FIGS. 49 and 50, the actuator insertion port 8 is closed by the first portion 73a of the movable body 22E, and the second portion 73b of the movable body 22E is below the locking member mounting hole H1. The side is covered. In this state, when the padlock is locked in the locking member mounting hole H1, even if the second portion 73b is rotated upward, the second portion 73b abuts on the locking hook of the padlock and the rotation is restricted. Therefore, the movable body 22E cannot be rotated unless the padlock is unlocked. As a result, unless the padlock is unlocked, the actuator 3 cannot be inserted into the actuator insertion port 8, and the safety of the operator is ensured.

[Embodiment 8]
51 is a front view of a switch body (with the actuator insertion port 8 opened) to which the safety holder according to the eighth embodiment is attached, and FIG. 52 is a switch to which the safety holder according to the eighth embodiment is attached. 53 is a side view of the main body (in a state in which the actuator insertion port 8 is opened), and FIG. 53 is a front view of the switch main body (in a state in which the actuator insertion port 8 is closed) to which the safety holder according to the eighth embodiment is attached. FIG. 54 is a side view of a switch body (a state where the actuator insertion port 8 is closed) to which the safety holder according to the eighth embodiment is attached.

  In the first to seventh embodiments, the safety holder is attached to the switch body using the first screw 100. However, in the present embodiment, the safety holder is switched using the second screw 102. It is characterized by adopting a method of attaching to the main body.

  This embodiment basically has a configuration similar to that of the first embodiment, and corresponding portions are denoted by the same reference numerals. The safety holder 20F according to the eighth embodiment rotates over a base body 21F attached to the switch body 2, a first position where the actuator insertion port 8 is opened, and a second position where the actuator insertion port 8 is closed. The movable body 22F is attached to the base body 21F as possible (see FIG. 52). The difference from the first embodiment is that in the safety holder 20F in the present embodiment, the main body portion 21a of the base body 21F extends to the back side of the switch main body 2 and a fixing portion 80 is formed. That is, the main body portion 21a in the present embodiment includes a vertical portion 21a1, a horizontal portion 21a2, and a fixed portion 80. The fixing portion 80 is formed with a through hole (not shown) through which the second screw 102 is inserted. When the safety holder 20F is attached, the fixing portion 80 is brought into contact with a predetermined attachment surface and attached using the second screw 102.

  In the safety holder 20F configured as described above, since the safety holder is attached to the switch body 2 using the second screw 102, the safety switch 1 having a structure in which the contact is turned on when the operation head portion 5 is separated from the switch portion 6. The safety holder can be attached to the safety switch 1A having a structure in which the contact is turned off when the operation head unit 5 is separated from the switch unit 6 in an existing state in which the switch body is installed on the mounting surface. .

[Embodiment 9]
55 is a front view of a switch body (with the actuator insertion port 8 opened) to which the safety holder according to the ninth embodiment is attached, and FIG. 56 is a switch to which the safety holder according to the ninth embodiment is attached. 57 is a side view of the main body (in a state in which the actuator insertion port 8 is opened), FIG. 57 is a front view of the switch main body (in a state in which the actuator insertion port 8 is closed) to which the safety holder according to the ninth embodiment is attached. 58 is a side view of the switch body (actuator insertion port 8 is closed) to which the safety holder according to Embodiment 9 is attached.

  As in the eighth embodiment, the present embodiment is characterized in that a method of attaching the safety holder to the switch body 2 using the second screw 102 is employed. The safety holder 20G according to the ninth embodiment rotates over a base 21G attached to the switch body 2, a first position where the actuator insertion port 8 is opened, and a second position where the actuator insertion port 8 is closed. The movable body 22G is attached to the base 21G as possible (see FIG. 56). Although the safety holder 20F is fixed on the back side of the switch body 2 in the eighth embodiment, the safety holder 20G is fixed on the front side of the switch body in the present embodiment. For this reason, the base 21G includes a fixing portion 80A on the front surface side of the switch body 2, and a through hole (not shown) through which the second screw 102 is inserted is formed in the fixing portion 80A.

  With this configuration, the safety switch 1 has a structure in which the contact is turned on when the operation head unit 5 is separated from the switch unit 6, and the contact is turned off when the operation head unit 5 is separated from the switch unit 6, as in the eighth embodiment. For any of the safety switches 1A having the above structure, the safety holder can be attached in an existing state in which the switch body is installed on the mounting surface.

(Other matters)
(1) Although the padlock is used as the locking member in the above embodiment, a chain lock or a hasp may be used instead of the padlock.

  (2) In the above embodiment, the switch body of the type that can open and close the lid 105 with one screw (corresponding to the third screw 103) has been exemplified, but the safety holder according to the present invention has four corners. The present invention can also be applied to a switch body of a type in which the lid 105 can be attached and detached with a screw (corresponding to the third screw 103).

  The present invention can be suitably implemented in a safety holder for a safety switch.

DESCRIPTION OF SYMBOLS 1,1A: Safety switch 2: Switch main body 3: Actuator 5: Operation head part 6: Switch part 100: 1st screw 102: 2nd screw 105: Lid H1, H2: Locking member attachment hole 20, 20A, 20B, 20C, 20D, 20E, 20F, 20G: Safety holder 21, 21A, 21B, 21C, 21D, 21E, 21F, 21G: Base body 22, 22A, 22B, 22C, 22D, 22E, 22F, 22G: Movable body

Claims (7)

An actuator insertion slot for inserting an actuator is provided, and an operation head portion provided with a drive cam that is turned by insertion of the actuator therein, and an operation head portion that is coupled to the operation head portion and responds to rotation of the drive cam inside. A safety switch comprising a switch part having a contact for switching connection, and preventing the erroneous insertion of the actuator,
A base attached to the safety switch and having a locking member attaching hole;
A movable body having a locking member mounting hole and movably mounted on the base body over a first position where the actuator insertion port is opened and a second position where the actuator insertion port is blocked;
With
When the movable body reaches the second position by the moving operation of the movable body, a safety holder is provided in which a state in which the locking member mounting hole of the base body and the locking member mounting hole of the movable body overlap each other appears.   The base is attached to the safety switch using a first screw for fixing the operation head part to the switch part or a second screw for fixing the safety switch to a predetermined mounting surface. The safety holder according to claim 1.   The safety holder according to claim 2, wherein when the movable body reaches the second position, the first screw for fixing the operation head portion to the switch portion cannot be detached. The switch part has a lid that opens and closes or detaches when wiring to the switch part,
The safety holder according to any one of claims 1 to 3, wherein at least a part of the base body covers at least a part of the lid.   The safety holder according to claim 4, wherein the base is attached to the safety switch after the safety switch is installed on a predetermined mounting surface.   6. The safety switch according to claim 5, wherein the safety switch is a safety switch having a structure in which a contact is turned off when the operation head unit is separated from the switch unit, and the base is attached to the safety switch using the first screw. Ingredients.   6. The safety switch according to claim 5, wherein the safety switch is a safety switch having a structure in which a contact is turned on when the operation head portion is separated from the switch portion, and the base is attached to the safety switch using the second screw. Ingredients.

Images