JP4879665B2 - Safety switch - Google Patents

Description

  The present invention relates to a safety switch.

A conventional safety switch is disclosed in Patent Document 1. In this safety switch, an operation unit that holds a moving body (cam member) driven by an actuator and a main body unit that includes a switch that is driven on and off by the moving body are provided. It is fixed by etc. The safety switch is fixed by fixing the main body to a predetermined fixing target member with a screw or the like. For this reason, in this safety switch, the operation unit is fixed to the fixing target member via the main body unit.
JP 2003-331696 A

  In general, a safety switch is provided at an entrance that is opened and closed by a door or the like, and the safety switch is turned on and off by an actuator being inserted into and removed from the operation portion of the safety switch as the door is opened and closed. For this reason, when the door or the like is closed and the actuator is engaged with the cam member or the like in the operation portion of the safety switch, an impact or the like is easily applied to the operation portion. Further, in a safety switch with a lock mechanism, an impact or the like is applied to the operation unit even when the door or the like is locked and forcibly opened.

  However, in the above-described conventional safety switch, the operation unit is configured to be fixed to the fixing target member via the main body unit. Therefore, an impact applied to the operation unit when the actuator is engaged or the like is applied to the operation unit and the main unit unit. Is provided to the main body through a fixing portion, and is released to the fixing target member through the main body. For this reason, a load is easily applied to the fixing portion between the operation portion and the main body due to the impact, and the strength of the fixing portion is likely to be reduced. In addition, a fixing tool such as a screw for fixing the operation unit to the main body is necessary, resulting in a complicated structure, an increase in the number of parts, and a high cost.

  Therefore, the problem to be solved by the present invention is to provide a safety switch that can improve the mechanical strength against an impact or the like generated when the actuator is engaged, etc., with a simple configuration.

In order to solve the above-mentioned problems, in the invention of claim 1, the actuator attached to the second partition is inserted and removed as the first partition and the second partition open and close the doorway. A safety switch that is turned on and off by being moved, wherein the movable body is displaced in a predetermined direction by an actuator, the operation unit that holds the movable body so as to be displaceable in the predetermined direction, and the displacement that is displaced by the actuator on the mobile, it includes a main body switch is provided to be off-drive, wherein the operating portion is fixed to the first partition wall, wherein the operating part is displaceably supported the movable body in the predetermined direction A continuous member integrally formed from the supporting portion to the fixing portion fixed to the first partition wall, and the fixing portion of the operating member in the continuous member includes a first member A fixed hole is provided, a second fixing hole is provided in the main body portion, and the operation portion and the main body portion are provided with a substantially rod-shaped fixing tool in the first fixing hole and the second fixing hole. By being passed, it is fastened together and fixed to the first partition .

In the second aspect of the invention, the actuator is provided in the first partition, and is turned on when the actuator attached to the second partition is inserted / removed as the doorway is opened / closed by the first partition and the second partition. A safety switch to be turned off, which is turned on and off by a moving body that is displaced in a predetermined direction by an actuator, an operation unit that holds the moving body so as to be displaceable in the predetermined direction, and the moving body that is displaced by the actuator A main body provided with a switch to be driven, the operation unit is fixed to the first partition, the moving body is a cam member that is rotationally displaced by the actuator, and the operation unit includes The safety switch includes a pair of holding members that support the cam member so as to be sandwiched from both sides in the axial direction, and the safety switch includes the cam member and the pair of holding members. A cap member mounted so as to surround the material, and the holding member includes a support portion that rotatably supports the cam member, and a fixing portion that is fixed to the first partition, A portion from the support portion to the fixing portion is integrally formed, and the fixing portion of the holding member is provided with a first fixing hole, and the main body portion is provided with a second fixing hole, The operation part and the main body part are fastened together and fixed to the first partition wall by passing a rod-like fixing tool through the first fixing hole and the second fixing hole, and the cap member is The portion of the pair of holding members provided with the support portion is prevented from opening in the axial direction of the cam member .

  According to the first aspect of the present invention, since the operation portion that receives an impact when the actuator is engaged is fixed to the first partition wall, the mechanical strength against the impact from the actuator is improved with a simple configuration. Therefore, it is possible to prevent the operation unit from dropping off, and it is advantageous for downsizing.

In addition , since the operation unit is provided with a continuous member integrally formed from the support unit that supports the movable body so as to be displaceable in a predetermined direction to the fixing unit fixed to the first partition wall, The mechanical strength against the impact can be effectively improved and the operation part or the like can be reliably prevented from falling off.

In addition , since the operation portion and the main body portion are fastened together and fixed to the first partition wall, a fixing structure such as a dedicated fixing tool for fixing the operation portion and the main body portion as in the past may be omitted. This simplifies the structure, reduces the number of parts and the number of assembly steps, reduces costs, and is advantageous for downsizing.

According to the second aspect of the present invention, since the operation portion that receives an impact when the actuator is engaged is fixed to the first partition, the mechanical strength against the impact from the actuator is improved with a simple configuration. Therefore, it is possible to prevent the operation unit from dropping off, and it is advantageous for downsizing.
Further , since the operation portion is provided with a pair of holding members integrally formed from a support portion that supports the cam member so as to be capable of rotational displacement to a fixing portion that is fixed to the first partition wall, It is possible to effectively improve the mechanical strength with respect to the impact, and to reliably prevent the operation unit from falling off.

  In addition, since the operation portion and the main body portion are fastened together and fixed to the first partition wall, a fixing structure such as a dedicated fixing tool for fixing the operation portion and the main body portion as in the past may be omitted. This simplifies the structure, reduces the number of parts and the number of assembly steps, reduces costs, and is advantageous for downsizing.

  In addition, since the cap member prevents the portion of the pair of holding members provided with the support portions from opening in the axial direction of the cam member, the cam member can be prevented from falling off the holding member with a simple configuration.

  1 is an exploded perspective view of a safety switch according to an embodiment of the present invention, FIG. 2 is a side view of the safety switch of FIG. 1, and FIG. 3 is a sectional view taken along line AA of FIG. FIG. 4 is a sectional view around the cam member of the safety switch of FIG.

  As shown in FIGS. 1 to 4, the safety switch 1 includes a cam member 3 as a moving body driven by an actuator 2, an operation unit 4 for holding the cam member 3, a switch (not shown), and the like. A portion 5 and a cap member 6 are provided.

The operation unit 4 includes a pair of holding members (continuous members) 11 that contribute to supporting the cam member 3 and fixing the operation unit 4 to the fixing target member 7. The holding member 11 includes a supporting portion 11a for supporting so as to sandwich the cam member 3 from both sides, and a fixing portion 11b for fixing the operating portion 4 to the stationary object member 7. And the whole including the support part 11a and the fixing | fixed part 11b of this holding member 11 is integrally formed by the metal etc. in the substantially plate shape. The holding member 11 is manufactured by pressing, casting, cutting, or the like from a metal plate. Note that the holding member 11 may be integrally formed of resin.

  The support portion 11 a of the holding member 11 is provided with a receiving portion (for example, a hole portion) 13 that supports the shaft member 12 inserted (or provided) through the cam member 3. The cam member 3 is supported by the support portion 11a in a state in which the cam member 3 can be rotationally displaced about the axis. Further, at least one (for example, two) fixing holes 14 are provided in the fixing portion 11b. Then, a substantially rod-shaped fixture 15 such as a fixing screw is inserted into the fixing hole 14.

  The main body 5 is provided with a casing 21 made of resin or metal. The casing 21 is provided with a switch (not shown) that is turned on and off by the cam member 3 and an electromagnetic lock mechanism (not shown) that locks the rotational displacement of the cam member 3. More specifically, referring to FIG. 4, as the actuator 2 is inserted into and removed from the operation unit 4 through the opening 6 a provided in the cap member 6 as indicated by an arrow B, The engaging surfaces 22a and 22b of the engaging portion 22 of the actuator 2 are brought into contact with and engaged with the engaging surfaces 3a and 3b of the cam member 3, so that the cam member 3 is rotationally displaced about the axis. In accordance with the rotational displacement of the cam member 3, the shaft member 23 of the switch is moved in and out by the cam surface 3c of the cam member 3, whereby the switch is turned on and off. Further, when the actuator 2 is completely inserted, the lock member 24 of the electromagnetic lock mechanism engages with the locking surface 3d of the cam member 3, whereby the cam member 3 rotates in the pulling direction of the actuator 2. (That is, the opening of the door, etc.) can be stopped. The locked state by the electromagnetic lock mechanism is released by operating an operation switch (not shown). The electromagnetic lock mechanism is not essential and can be omitted. As described above, in the present embodiment, the operation unit 4 includes the cam member 3, the holding member 11, and the cap member 6.

  Further, the housing 21 of the main body 5 is provided with a fixing portion 21 a for fixing the main body 5 to the fixing target member 7. At least one (for example, two) fixing holes (second fixing holes) 25 are provided in the fixing portion 21a. The fixing hole 25 and the fixing hole 14 of the holding member 11 are provided at positions corresponding to each other, and a common fixing tool 15 is inserted therein. The holding member 11 of the operation unit 4 and the fixing part 11a of the casing 21 are arranged so as to sandwich the fixing part 21a of the casing 21 from both sides by the fixing part 11b of the holding member 11. The fixing tool 15 is inserted into and fastened. Thereby, the operation unit 4 and the main body unit 5 are fixed to the fixing target member 7 in a state where the operation unit 4 and the main body unit 5 are fastened together by the fixing tool 15.

Before the holding member 11 and the main body portion 5 are fixed to the fixing target member 7 by the fixture 15, the holding member 11 is temporarily fixed to the housing 21 of the main body portion 5 by the fitting structure described below. It has become. As described above, the safety switch 1 can be attached and the like while the operation unit 4 and the main body unit 5 are temporarily fixed to each other, so that the safety switch 1 can be easily handled and attached.

As the fitting structure, for example, the fixing portion 11b of the holding member 11 is formed so as to be substantially convex inward in the axial direction of the cam member 3, and the fixing portion 21a of the housing 21 is correspondingly formed. It is formed in a substantially concave shape. Then, Ri by the be fitted so as to press-fit fixing portion 11b to the fixing portion 21a, so that the tacking is performed. Further, as shown in FIG. 1, an engaging piece 26 is bent and raised in a substantially right angle direction on the outer edge portion of the support portion 11 a of the holding member 11, and the fitting portion is fitted to a corresponding portion of the housing 21. A fitting recess 27 into which the mating piece 26 is press-fitted and fitted is provided, and the fitting piece 26 and the fitting recess 27 are fitted together to be temporarily fixed.

  Further, the cap member 6 has a form that encloses the cam member 3 and the holding member 11 of the operation unit 4. When the cap member 6 is attached to the operation portion 4, the cap member 6 supports the portion of the holding member 11 where the support portion 11 a is provided from the outside, and prevents the portion from opening in the axial direction of the cam member 3. It is like that. Further, the cap member 6 is provided with an opening 6 a for inserting and removing the actuator 2. The cap member 6 is fixed by passing a screw 28 through the screw hole 6 b of the cap member 6 and screwing the screw 28 into the screw hole 29 of the housing 21.

  FIG. 5 is a diagram illustrating an example of an installation state of the safety switch 1. For example, as shown in FIG. 5, the safety switch 1 is installed at an entrance 31 or the like in a security area where it is necessary to ensure the safety of an operator. As the door 32 of the doorway 31 is opened and closed, the actuator 2 is inserted into and removed from the operation unit 4 of the safety switch 1, and accordingly, the power line of the manufacturing apparatus in the security area is turned on by the safety switch 1. It is supposed to be turned off. In the example of FIG. 5, the safety switch 1 is fixed to the wall member (or column member) 33 that is the fixing target member 7 around the entrance 31 and the actuator 2 is fixed to the door 32 via the fixture 34. However, conversely, the actuator 2 may be fixed to the wall member (or column member) 33 side, and the safety switch 1 may be fixed to the door 32 side. Here, one of the wall member 33 and the door 32 corresponds to a first partition, and the other corresponds to a second partition. In the example of FIG. 5, the door 32 is opened and closed by sliding in the direction of the arrow C, but the door 32 may be opened and closed by rotating (or swinging). In the manufacturing site in the above-described installation state, the door 32 is often very heavy, and an operator often opens and closes the door 32 with an excessive force, so that a large load from the door 32 is a small actuator. Since the impact is easily transmitted to the safety switch 1 due to the fact that the impact is easily transmitted to the safety switch 1, it is effective to apply the present invention to such an installation state.

  As described above, according to the safety switch 1 according to the present embodiment, the operation unit 4 that receives an impact when the actuator 2 is engaged or the like is directly fixed to the member 7 to be fixed. (2) The mechanical strength against an impact at the time of engagement or the like can be improved, the operation part 4 or the like can be prevented from falling off the fixing target member 7 and the like, which is advantageous for downsizing. Further, in the case of a safety switch with a locking mechanism, the mechanical strength against an impact applied to the operation unit 4 can be improved even when the door 32 and the like are locked and forcibly opened.

  Further, the operation unit 4 is provided with a pair of holding members 11 in which a portion from a support portion 11a that supports the cam member 3 so as to be rotationally displaceable to a fixing portion 11b that is fixed to the fixing target member 7 is integrally formed. Therefore, it is possible to effectively improve the mechanical strength against an impact or the like when the actuator 2 is engaged, and it is possible to surely prevent the operation unit from dropping off, and it is advantageous for downsizing.

  Moreover, since the operation part 4 and the main body part 5 are fastened together and fixed to the member 7 to be fixed, a fixing structure such as a dedicated fixing tool for fixing the operation part 4 and the main body part 5 as in the prior art. The structure can be simplified, the number of parts and the number of assembling steps can be reduced, the cost can be reduced, and the size can be reduced.

  In addition, the cap member 6 prevents the portion of the pair of holding members 11 provided with the support portions 11a from opening in the axial direction of the cam member 3, so that the cam member 3 from the holding member 11 can be removed with a simple configuration. Dropping off can be prevented.

Further, as shown in FIG. 1, the fixing portion 11 b is on the main body 5 side of the operation portion 4, and is on both sides of an elongated rod-shaped shaft member 23 positioned between the operation portion 4 and the main body 5 of the switch 1. Are preferably provided in the two empty areas (fixed hole 14 in FIG. 1). By utilizing this empty area, the safety switch 1 can be slimmed and miniaturized, and the holding member 11 in which the portion from the support portion 11a to the fixing portion 11b is integrally formed as described above is applied. can Rukoto improve the mechanical strength by. Alternatively, in order to further improve the mechanical strength, the fixing tool 15 may be as close to the shaft member 12 as possible to easily release the impact from the actuator 2 to the fixing target member 7. For example, instead of the shaft member 12, a screw (fixing tool) that is rotatably inserted into the cam member 4 and penetrates the holding member 11 and the cap member 6 and the tip is fixed to the fixing target member 7 may be used. .

  As a modification of the holding member 11 of the operation unit 4 in the safety switch 1 of the above-described embodiment, a pair of left and right holding members 11 may be integrally formed as shown in FIG.

It is a disassembled perspective view of the safety switch which concerns on one Embodiment of this invention. It is a side view of the safety switch of FIG. It is sectional drawing along the AA line of FIG. It is sectional drawing of the cam member periphery of the safety switch of FIG. It is a figure which shows an example of the installation state of the safety switch of FIG. It is sectional drawing of the modification of the safety switch of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Safety switch, 2 Actuator, 3 Cam member, 4 Operation part, 5 Main body part, 6 Cap member, 7 Member to be fixed, 11 Holding member, 11a Support part, 11b Fixing part, 12 Shaft member, 14 Fixing hole, 15 Fixing Tool, 21 housing, 21a fixing part, 25 fixing hole.

Claims (2)

A safety switch that is provided on the first partition and is turned on and off when an actuator attached to the second partition is inserted and removed in accordance with opening and closing of the entrance and exit between the first partition and the second partition;
A moving body displaced in a predetermined direction by an actuator;
An operation unit for holding the movable body so as to be displaceable in the predetermined direction;
A main body provided with a switch that is driven on and off by the moving body displaced by the actuator;
With
The operating unit is fixed to the first partition wall,
The operation unit is
A continuous member formed integrally with a portion extending from a support portion that supports the movable body so as to be displaceable in the predetermined direction to a fixed portion that is fixed to the first partition;
A first fixing hole is provided in the fixing part of the continuous member of the operation part, and a second fixing hole is provided in the main body part,
The operation portion and the main body portion are fastened together and fixed to the first partition by passing a substantially rod-shaped fixture through the first fixing hole and the second fixing hole. Features safety switch. A safety switch that is provided on the first partition and is turned on and off when an actuator attached to the second partition is inserted and removed in accordance with opening and closing of the entrance and exit between the first partition and the second partition;
A moving body displaced in a predetermined direction by an actuator;
An operation unit for holding the movable body so as to be displaceable in the predetermined direction;
A main body provided with a switch that is driven on and off by the moving body displaced by the actuator;
With
The operation portion is fixed to the first partition;
The moving body is a cam member that is rotationally displaced by the actuator,
The operation portion includes a pair of holding members that support the cam member so as to be sandwiched from both sides in the axial direction thereof,
The safety switch further includes a cap member mounted so as to surround the cam member and the pair of holding members,
The holding member includes a support portion that supports the cam member so as to be rotationally displaceable, and a fixing portion that is fixed to the first partition, and a portion from the support portion to the fixing portion is integrally formed. And
A first fixing hole is provided in the fixing part of the holding member, and a second fixing hole is provided in the main body part,
The operation part and the main body part are fastened together and fixed to the first partition wall by passing a rod-like fixing tool through the first fixing hole and the second fixing hole,
The safety switch according to claim 1, wherein the cap member prevents a portion of the pair of holding members provided with the support portion from opening in the axial direction of the cam member .

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