JP4467396B2 - Protective cover - Google Patents

Description

  The present invention is provided in a switch device of a control panel operation unit, and an operator can safely operate an industrial machine or the like. Therefore, the switch device is covered and cannot be operated when the industrial machine or the like is stopped or operated. It is related with improvement of the protective cover for making it.

  As a conventional technology of this type of protective cover, as shown in FIG. 18, a movable cover 102 is rotatably attached to one end of a fixed cover 101 fixed to a switch having a rotary knob 100 of the switch.

Japanese Utility Model Publication No. 60-115423 (see FIG. 3)

  However, the protective cover described in Patent Document 1 has a rotating radius of the movable cover 102 because the rotating shaft of the movable cover 102 is provided at the end. Therefore, it is necessary to increase the open space of the movable cover 102.

  The present invention has been conceived in view of the above circumstances, and an object of the present invention is to provide a switch device in which the radius of rotation of the movable cover is made as small as possible and the space when the movable cover is opened is reduced. Is to provide a protective cover.

In order to achieve the above object, the invention according to claim 1 of the present invention includes a fixed cover fixed to a mounting surface to which the switch device is attached, a first position that covers the switch device, and a second that opens the switch device. A movable cover that can be rotated over a range of positions, and when the movable cover is in the first position, a restricting means that restricts the opening of the movable cover is attached to prevent the movable cover from being opened. The movable cover is configured such that the pivot shaft of the movable cover is provided at a position excluding the end portion of the side wall of the fixed cover, and the restricting means is attached to one of the fixed cover and the movable cover. In either one of the fixed cover and the movable cover, a restricting means mounting hole through which the locking portion of the restricting means is inserted is formed. Or in the other, the regulating means is in contact with Kiga notch for restricting the rotation of the opening direction of the movable cover forming the engaging portion of the restricting means when attached to the regulating unit mounting hole It is characterized by that.

With the above configuration, the radius of rotation of the movable cover is reduced, and the open space of the movable cover can be reduced. In addition, with the above configuration, the protective cover can be reduced in size as compared with the configuration in which the restricting means is attached to both the fixed cover and the movable cover. Furthermore, with the above configuration, the movable cover can be reliably held at the first position, and the safety of the operator is ensured.

The invention according to claim 2 is the protective cover according to claim 1 , wherein the switch device includes a member that is detachable from the switch device and switches a switch function by detachment from the switch device. The movable cover is rotated to a first position covering the switch device in a state where the member is removed or attached.

  With the above configuration, a switch device including a member that switches a switch function by attaching / detaching the switch device, such as a safety plug or a key switch (equivalent to a plug in the case of a safety plug, equivalent to a key in the case of a key switch) It becomes possible to apply to the protective cover.

According to the present invention, the radius of rotation of the movable cover can be made as small as possible. Thereby, the space when the movable cover is opened can be reduced.
In addition, since the restricting means is configured to be attached to either the fixed cover or the movable cover, the protective cover can be reduced in size as compared with the configuration in which the restricting means is attached to both the fixed cover and the movable cover.

  Hereinafter, a protective cover according to 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)
FIG. 1 is an exploded perspective view of the entire switch device including the protective cover according to the first embodiment, FIG. 2 is a plan view of the protective cover in a state where the movable cover is opened, and FIG. FIG. 4 is a bottom view of the protective cover in a state in which the movable cover is opened, and FIG. 5 is a side view of the protective cover in a state in which the movable cover is opened. 6 is a plan view of the protective cover when the movable cover is closed, FIG. 7 is a front view of the protective cover when the movable cover is closed, and FIG. 8 is a protection when the movable cover is closed. FIG. 9 is a bottom view of the cover, and FIG. 9 is a side view of the protective cover in a state where the movable cover is closed. 2 to 9, the safety plug (corresponding to the switch device) is omitted for easy illustration.

  As shown in FIG. 1, the operation unit 1 of the control panel is provided with a plurality of switch devices such as a safety plug 2 and other key switches and select switches. A protective cover 3 is provided in association with the plurality of switch devices. The safety plug 2 includes a safety plug main body 2a and a plug 2b (which is detachable from the switch device and corresponds to a member that switches a switch function by detachment from the switch device), and the plug 2b is connected to the main body. The power supply circuit of a predetermined machine is turned on by being mounted on 2a and rotated in a predetermined direction, and the power supply circuit of the predetermined machine is cut off by removing the plug part 2b from the main body part 2a. Yes.

In the following description, the protective cover 3 related to the safety plug 2 will be described as an example.
The protective cover 3 includes a fixed cover 4 that is fixed to the operation unit 1 of the control panel, a movable cover 5 that can rotate between a first position that covers the safety plug 2 and a second position that opens the safety plug 2. And when the movable cover 5 is in the first position, for example, a lock 6 such as a padlock (corresponding to a restricting means for restricting the opening of the movable cover 5) is applied to prevent the movable cover 5 from being opened. It is configured. The protective cover 3 is fixed by a locking tool 40 in a state where the fixed cover 4 is attached to the safety plug body 2a.

  Next, a specific configuration of the protective cover 3 will be described. The fixed cover 4 includes a bottom surface portion 4a and side walls 4b and 4b that are integrally formed on the left and right ends of the bottom surface portion 4a. The bottom surface portion 4a is formed with an insertion hole 4c through which the safety plug main body portion 2a is inserted. Further, the side wall 4b is formed with an insertion hole 8 through which the screw 7 is inserted from the center portion, and a locking hook 6a of the key 6 (corresponding to a locking portion of a regulating means for regulating the opening of the movable cover 5). A key attaching hole (corresponding to a restricting means attaching hole) 9 is formed. The insertion hole 8 is disposed on the front side of the key attachment hole 9 (oblique front side in FIG. 1, right side in FIG. 5).

  The movable cover 5 includes a cover main body portion 5a having a front surface formed in a semicircular arc shape, and arm portions 5b and 5b integrally formed at both left and right ends of the cover main body portion 5a. The arm portion 5 b includes an arm portion main body portion 12 and a protruding portion 13 that protrudes inward from the front surface side end portion of the arm portion main body portion 12. An insertion hole 14 through which the screw 7 is inserted is formed in the arm main body 12. An arc-shaped cutout 15 is formed at the end of the arm main body 12 (the front end in FIG. 1 and the lower end in FIG. 5). As will be described later, the notch 15 contacts the outer peripheral surface of the locking hook 6 a of the key 6 when the key 6 is hooked in the key attachment hole 9, and the movable cover 5 covers the safety plug 2. The rotation from the position to the second position side where the safety plug 2 is opened is restricted.

  Further, a fitting groove 16 is formed between the distal end portion of the protruding portion 13 and the distal end portion of the arm main body portion 12. As will be described later, when the key 6 is hooked into the key attachment hole 9, the fitting groove 16 is fitted into the side wall 4b, and the movable cover 5 covers the safety plug 2 from the first position X1. Rotation in the direction (see FIG. 9) is restricted.

  Note that the fixed cover 4 and the movable cover 5 have the arm portion main body portion 12 of the movable cover 5 disposed outside the side wall 4b of the fixed cover 4, and the screws 7 are sequentially inserted through the insertion holes 8 and 14, and the tips thereof are caulked. (See FIG. 10). Accordingly, the movable cover 5 is attached to the fixed cover 4 so as to be rotatable about the screw 7 as a rotation axis. Further, since the position of the screw 7 is in the vicinity of the center portion of the side wall 4b of the fixed cover 4, the rotation radius can be reduced as compared with the configuration in which the rotation shaft is provided at the end portion as in the conventional example. The open space can be reduced. As a result, it is possible to reduce the area of the operation unit 1 without hindering the operation of the adjacent switch device, and more switch devices can be arranged if the operation unit 1 has a constant area. It becomes.

  FIG. 11 is a side view of the protective cover showing a rotating operation state of the movable cover. The operation of the protective cover will be described with reference to FIG. First, as shown in FIG. 11A, when the movable cover 5 is in an open state, the plug portion 2b is attached to the safety plug main body portion 2a. Therefore, the predetermined machine is in an operating state. Then, when the operation of the predetermined machine is stopped, the plug portion 2b is removed from the safety plug main body portion 2a, and as shown in FIG. 11 (2), the movable cover 5 is rotated in the direction of the arrow with the screw 7 as the rotation axis for safety. The movable cover 5 shown in FIG. 11 (3) is in a state of covering the safety plug main body 2a. In the first position where the movable cover 5 covers the safety plug body 2a, the fitting groove 16 is fitted into the side wall 4b, and the movable cover 5 further rotates in the direction of the arrow as compared with the first position where the safety plug body 2a is covered. Is regulated. In this state, the key 6 is attached to the key attachment hole 9. Accordingly, as shown in FIG. 11 (4), the notch 15 of the movable cover 5 comes into contact with the outer peripheral surface of the locking hook 6 a of the key 6, and the movable cover 5 covers the safety plug 2 from the first position. The rotation to the second position side that opens the safety plug 2 is restricted. As a result, since the movable cover 5 cannot be opened unless the key 6 is removed, the plug portion 2b is not accidentally attached to the safety plug body portion 2a, and the safety of the operator is ensured.

  For reference, the structure of the present invention in which the key 6 is attached only to the movable cover 5 as shown in FIG. 12 (1) and both the movable cover 5 and the fixed cover 4 as shown in FIG. 12 (2). As shown in FIGS. 12 (1) and 12 (2), the configuration of the present invention is compared with the configuration of the conventional example in which the key mounting hole 9 is provided on the key 6 and the key 6 is mounted on both the key mounting holes 9. However, the movable cover 5 can be made smaller. In other words, the protective cover 3 can be made smaller in the present invention than in the conventional example.

( Modification )
13 is an exploded perspective view of a protective cover according to a modification , FIG. 14 is a plan view thereof, FIG. 15 is a side view of the protective cover in a state where the movable cover is opened, and FIG. FIG. 17 is a side view of the protective cover in a closed state, and FIG. 17 is a plan view of the protective cover in a locked state. This modification is characterized in that the rotating shaft of the movable cover is configured to be movable. Hereinafter, a specific configuration will be described with reference to the drawings.

  On the side wall 4b of the fixed cover 4, a guide groove 20 is formed which includes a lateral groove portion 20a extending in the lateral direction and a longitudinal groove portion 20b extending downward from the end of the lateral groove portion 20a. On the other hand, the movable cover 5 includes a cover main body 51 having a handle 50 and side walls 52 integrally formed at both left and right ends of the cover main body 51. The side wall 52 is formed with a key attachment hole 9 and is fitted into the guide groove 20 and movable along the guide groove 20 in a state of being opposed to the side wall 4 b of the fixed cover 4. , 21 are formed. The protrusion 21 functions as a rotation axis in the opening / closing operation of the movable cover 5. That is, when the movable cover 5 is lifted upward from the state in which the movable cover 5 shown in FIG. 15 is opened, the protrusion 21 is guided upward along the vertical groove portion 20b of the guide groove 20, and then the protrusion 21 is moved to the vertical groove portion. When the movable cover 5 is moved forward (leftward in FIG. 16) after reaching the upper portion of 20b, the protrusion 21 is guided forward along the lateral groove 20a. When the protrusion 21 reaches the end of the lateral groove 20a, the movable cover 5 is in a state of covering the switch device as shown in FIG. In such a state, the key 6 is attached to the key attachment hole 9 to hold the movable cover 5 in a closed state. With such a configuration, the radius of rotation of the movable cover 5 can be further reduced as compared with the first embodiment.

(Other matters)
(1) In the above embodiment, the safety plug is taken as an example of the switch device. However, the present invention is a member that can be attached to and detached from the switch device such as a key switch, and switches the switch function by detachment from the switch device. It can be applied to a wide range of switch devices such as a switch device provided with

  (2) In the above embodiment, a padlock is taken as an example of the key. However, a latch, a pin, or the like may be used instead of the key. In short, any device may be used as long as it can restrict the opening of the movable cover so that the switch device cannot be operated by hand.

(3) In the above modification , the guide groove 20 is formed on the side wall 4 b of the fixed cover 4, and the protrusion 21 that fits into the guide groove 20 and moves along the guide groove 20 is formed on the side wall 52 of the movable cover 5. Although formed, the guide groove 20 may be formed on the side wall 52 of the movable cover 5, and the protrusion 21 may be formed on the side wall 4 b of the fixed cover 4.

  The present invention can be preferably implemented in a protective cover of a switch device.

2 is an exploded perspective view of the entire switch device including the protective cover according to Embodiment 1. FIG. It is a top view of the protective cover in the state where the movable cover based on Embodiment 1 was opened. It is a front view of the protective cover in the state where the movable cover based on Embodiment 1 was opened. It is a bottom view of a protective cover in the state where a movable cover was opened concerning Embodiment 1. It is a side surface of the protective cover in the state by which the movable cover based on Embodiment 1 was open | released. FIG. 3 is a plan view of the protective cover in a state where the movable cover is closed according to the first embodiment. FIG. 3 is a front view of the protective cover in a state where the movable cover is closed according to the first embodiment. FIG. 3 is a bottom view of the protective cover according to Embodiment 1 in a state where the movable cover is closed. FIG. 3 is a side view of the protective cover according to Embodiment 1 in a state where the movable cover is closed. It is sectional drawing which shows the state in which the screw | thread 7 was penetrated by the insertion holes 8 and 14. FIG. It is a side view of the protective cover which shows the rotation operation state of a movable cover. 12 (1) is a configuration diagram of the present invention in which the key 6 is attached only to the movable cover 5, and FIG. 12 (2) is a configuration diagram of a conventional example in which the key 6 is attached to both the movable cover 5 and the fixed cover 4. . It is a disassembled perspective view of the protective cover which concerns on a modification . It is a top view of the protective cover which concerns on a modification . It is a side view of a protection cover in the state where a movable cover was opened concerning a modification . It is a side view of a protection cover in the state where a movable cover was closed concerning a modification . It is a top view of the protection cover in the state where the key was hung, concerning a modification . It is a perspective view of a prior art example.

Explanation of symbols

1: Operation unit
2: Safety plug
3: Protective cover
4: Fixed cover
4b: Side wall of the fixed cover 4
5: Movable cover
6: Key 6a: Locking hook
7: Screw
9: Key mounting hole 15: Notch 16: Fitting groove 20: Guide groove 20a: Horizontal groove portion 20b: Vertical groove portion 21: Projection

Claims (2)

A fixed cover fixed to a mounting surface to which the switch device is mounted; a movable cover that can be rotated between a first position that covers the switch device and a second position that opens the switch device; A protective cover that prevents the opening of the movable cover by attaching a restricting means for restricting the opening of the movable cover when in the position state;
The pivot shaft of the movable cover is provided at a position excluding the end of the side wall of the fixed cover ,
The restricting means is configured to be attached to either the fixed cover or the movable cover,
In either one of the fixed cover and the movable cover, a restricting means mounting hole through which a locking portion of the restricting means is inserted is formed.
On the other of the fixed cover and the movable cover, when the restricting means is installed in the restricting means mounting hole, the movable cover is rotated in the opening direction by contacting the locking portion of the restricting means. A protective cover characterized by a notch to be regulated . The switch device includes a member that is detachable from the switch device and switches a switch function by being attached to and detached from the switch device.
The protective cover according to claim 1 , wherein the movable cover is rotated to a first position covering the switch device in a state where the member is removed or attached .