Mounting Structure of Door Opening / Closing State Detector

Abstract

To provide a fitting structure of a door opening and closing state detector, capable of detecting a door switch state with high accuracy even in the case where there are a variation and a fluctuation in a door position in a closing state.SOLUTION: A detector 4 for detecting an opening and a closing state of a door for opening and closing an open surface of a housing, is attached to the vicinity of an open surface of the housing, by a fitting tool 7 and a pair of pressing tools 8 to a direction where a front surface 53 of a case 5 is opposite to the door in a closing state. In the detector 4 for detecting the opening and closing state, a magnet, a yoke, a micro switch, and a spring are housed in the case 5. The detector is provided so as to change a switch, when the door constructed by a magnetic body is closed, and the door is magnetic attracted to the front surface 53 of the case 5, the door is opened, and the door is separated from the front surface 53 of the case 5. The case 5 is attached to the housing so as to enable the movement to a direction (an arrow M direction) orthogonal to the open surface.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to an attachment structure of a door opening / closing state detector.

Background Art

[0002] Conventionally, a door opening / closing state detector for detecting the opening / closing state of a door has been known. For example, Patent Document 1 discloses a door opening / closing state detector called a "magnet catch with switch" including a main body fixed near an opening surface of a housing and a suction plate fixed to a door that opens and closes the opening surface. The main body houses a magnet, a yoke, a microswitch, a spring, etc. in a case. The suction plate is a magnetic component such as a stainless steel plate, and when the door is closed, it is magnetically attracted to the front of the case.

[0003] In the above magnet catch with switch, in the open state of the door, the spring biases the yoke toward the back side of the case, pushing the actuator of the microswitch. Also, in the closed state of the door, when the suction plate is attracted to the front of the case, the yoke compresses the spring and is pulled together with the magnet toward the front side of the case, causing the actuator of the microswitch to protrude and the switch to change.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the mounting structure of the magnet catch with the switch described above, there were the following problems. That is, the position of the door in the closed state varies due to dimensional tolerances and assembly tolerances of the parts, and there are also variations due to the pushing when closing the door and the pulling for lock confirmation. Due to these variations and fluctuations in the door position, there was a problem that the magnet catch with the switch might not be able to correctly detect the open / closed state of the door.

[0006] Therefore, an object of the present invention is to provide a mounting structure of a door open / closed state detector that can accurately detect the open / closed state of a door even when there are variations and fluctuations in the door position in the closed state.

Means for Solving the Problems

[0007] The present invention is a mounting structure of a door open / closed state detector that is attached to a housing having an opening surface and detects the open / closed state of a door that opens and closes the opening surface. The door is made of a magnetic material or has a magnetic component attached thereto. The door open / closed state detector has a magnet and a switch housed in a case. When the door is closed and the door or the magnetic component is magnetically adsorbed to one surface of the case, and when the door is opened and the door or the magnetic component moves away from one surface of the case, the switch is provided so as to be switched. The case is attached to the housing so as to be movable in a direction orthogonal to the opening surface.

Effects of the Invention

[0008] According to the present invention, since the case is attached to the housing so as to be movable in a direction orthogonal to the opening surface, even when there are variations and fluctuations in the door position in the closed state, the case moves following the door. Therefore, the door open / closed state detector can accurately detect the open / closed state of the door. In addition, it is possible to prevent the door from hitting the door open / closed state detector strongly, and damage to the door open / closed state detector can be prevented.

Brief Description of the Drawings

[0009]

Figure 1

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Embodiments for Carrying Out the Invention

[0010] The "mounting structure of a door opening / closing state detector" according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9. The mounting structure 1 of the door opening / closing state detector 4 in this example is applied to the traffic signal controller 10 shown in FIGS. 1 to 4.

[0011] The traffic signal controller 10 is installed at intersections and crosswalks and controls the switching of lighting / extinguishing of signal lights (not shown) and lighting times. As shown in FIGS. 1 to 3, the traffic signal controller 10 includes a housing 21 formed in a box shape and having an opening surface 20 on one side thereof, and a main door 22 for opening and closing the opening surface 20. The housing 21 houses a control unit 34, an operation panel 35, a communication unit, a power supply unit, etc.

[0012] The main door 22 is rotatably attached to the housing 21 via a hinge 23. A second housing 26 that houses a switch 32 and a button 33 for manually operating the lighting state of the signal lamp device is attached to the back surface of the main door 22. Further, a small door 28 that opens and closes an opening surface 27 formed in the housing 26 and the main door 22 is rotatably attached to the front surface of the main door 22 via a hinge 29.

[0013] The main door 22 is provided with a lock body 24 having a keyhole, and the housing 21 is provided with a lock receiver 25 for locking the lock body 24. The main door 22 can be opened by unlocking the lock body 24 by the person having the key. By unlocking the lock body 24 and opening the main door 22, access can be gained to the operation panel 35 and the like. The main door 22 is a door that is mainly opened and closed when maintenance personnel inspect and maintain the traffic signal controller 10.

[0014] The small door 28 is provided with a lock body 30 having a keyhole, and the second housing 26 is provided with a lock receiver 31 for locking the lock body 30. The small door 28 can be opened by unlocking the lock body 30 by the person having the key. By unlocking the lock body 30 and opening the small door 28, access can be gained to the switch 32 and the button 33 inside the second housing 26 from the opening surface 27. That is, the person having the key of the small door 28 can open the small door 28 and operate the switch 32 and the button 33 with the lock body 24 of the main door 22 locked. The small door 28 is a door that is mainly opened and closed when a police officer manually operates the lighting state of the signal lamp device.

[0015] The mounting structure 1 of the door opening / closing state detector (hereinafter referred to as "detector") 4 in this example is applied to two locations of the traffic signal controller 10 described above. That is, two detectors 4 are used in the traffic signal controller 10. One detector 4 is mounted near the opening surface 20 of the housing 21 to detect the opening / closing state of the main door 22, and the other detector 4 is mounted near the opening surface 27 of the second housing 26 to detect the opening / closing state of the small door 28. These two detectors 4 have the same configuration. The detector 4 mounted on the housing 21 is mounted so as to be movable in a direction orthogonal to the opening surface 20 (the direction of arrow M in FIG. 5). The detector 4 mounted on the second housing 26 is mounted so as to be movable in a direction orthogonal to the opening surface 27. Since the configurations that enable these two detectors 4 to move, that is, the mounting structure 1 of the detector 4 are the same, the mounting structure 1 of the detector 4 mounted on the housing 21 will be described below as a representative.

[0016] The detector 4 shown in FIGS. 5 to 8 has a magnet (permanent magnet), a yoke, a microswitch, and a spring housed in a case 5 made of a non-magnetic material.

[0017] The case 5 has a rectangular case body 51 and a pair of mounting portions 52 protruding from both longitudinal ends of the case body 51. The magnet, the yoke, the microswitch, and the spring are housed in the case body 51. Long holes 54 extending in the width direction of the case body 51 are formed in each mounting portion 52.

[0018] The detector 4 is mounted near the opening surface 20 of the bottom surface of the housing 21 by a fixture 7 and a pair of pressing tools 8 with the surface (hereinafter referred to as "front surface") 53 on one end side in the width direction of the case body 51 being parallel to the opening surface 20, that is, facing the main door 22 in the closed state.

[0019] In the case body 51, the magnet is arranged on the front surface 53 side, and the microswitch is arranged on the back surface side. Three lead wires 6 of the microswitch are led out from the back surface of the case body 51. The yoke is fixed to the magnet and is arranged between the magnet and the microswitch.

[0020] When the main door 22 is in the open state, the spring biases the yoke toward the back side of the case body 51, i.e., the microswitch side, thereby pushing in the actuator of the microswitch. Further, the main door 22 is made of a ferromagnetic material and magnetically adheres to the front surface 53 of the detector 4 in the closed state. At this time, the yoke compresses the spring and is attracted toward the front surface 53 side together with the magnet, whereby the actuator of the microswitch protrudes and the switch is switched. When the main door 22 changes from this closed state to the open state and separates from the front surface 53 of the detector 4, the yoke moves toward the back side of the case body 51 together with the magnet by the biasing force of the spring, and the actuator of the microswitch is pushed in by this yoke, causing the switch to be switched.

[0021] Such a detector 4 detects the state in which the actuator of the microswitch is pushed in as the open state of the main door 22, and detects the state in which the actuator protrudes as the closed state of the main door 22.

[0022] In this example, the main door 22 is made of a ferromagnetic material, but it is not limited to this, and the main door 22 may be made of a non-magnetic material. In that case, a magnetic component (generally called an "adsorption plate") such as a stainless steel plate may be attached to the position where the main door 22 contacts the front surface 53 of the detector 4.

[0023] As shown in FIGS. 7 to 9, the fixture 7 includes a housing fixing portion 71 fixed to the housing 21 by screws 91, a plate portion 72 on which the case 5 of the detector 4 is placed, a pair of female screw spacers 73 erected from the plate portion 72, and a pair of pins 74 erected from the plate portion 72. The female screw spacer 73 is formed in a cylindrical shape and has internal threads cut on its inner peripheral surface. The pin 74 is passed through the long hole 54 of the case 5 and is formed in a cylindrical shape. The length of the long hole 54 is about 2 to 3 times the diameter of the pin 74. Further, the pin 74 has a larger height dimension than the female screw spacer 73.

[0024] As shown in Fig. 8, the pair of pressing members 8 are each formed in a flat plate shape, and are formed with a pin insertion hole 81 through which the pin 74 passes and a screw insertion hole 82.

[0025] When attaching the detector 4 to the housing 21, as shown in Fig. 8, place the case 5 on the plate portion 72 and pass each pin 74 through each long hole 54. Next, stack each pressing member 8 on each thumb screw spacer 73, align the screw insertion hole 82 with the center of the thumb screw spacer 73, and pass the portion of the pin 74 protruding from the long hole 54 of the pin 74 through the pin insertion hole 81. Then, pass a screw 92 through each screw insertion hole 82 and thread this screw 92 into the thumb screw spacer 73 to fix each pressing member 8 to the fixture 7. Then, stack the housing fixing portion 71 on the housing 21 and fix the housing fixing portion 71 to the housing 21 with a screw 91. Note that the detector 4 may be attached after first fixing the housing fixing portion 71 to the housing 21.

[0026] The detector 4 attached to the housing 21 in this way is movable in a direction orthogonal to the opening surface 20 (the direction of the arrow M in Figs. 5 and 7) with the pin 74 and the long hole 54 as guides. This "direction orthogonal to the opening surface 20" substantially coincides with the approaching and separating direction of the main door 22 with respect to the detector 4. As movement patterns, there are cases where the main door 22 hits the front surface 53 of the detector 4 and the detector 4 is pushed to the back side of the housing 21 by the main door 22 and moves, and cases where the detector 4 is attracted to the main door 22 side by magnetic force. Further, since the attachment portion 52 of the detector 4 is positioned between the plate portion 72 and the pressing member 8 facing each other, the pin 74 is prevented from coming out of the long hole 54. Furthermore, as shown in Fig. 6, a clearance S is provided between each pressing member 8 and the attachment portion 52 so that each pressing member 8 and the case 5 are non-contact. Thereby, the detector 4 can move smoothly.

[0027] Although the description of the attachment structure 1 of the detector 4 attached to the second housing 26 has been omitted, it has the same operational effects as the attachment structure 1 of the detector 4 attached to the housing 21.

[0028] The main door 22 and the small door 28 described above may have variations in the door position in the closed state due to dimensional tolerances and assembly tolerances of the components. There are also variations caused by pushing when closing the door and pulling for lock confirmation. However, in the traffic signal controller 10 of this example, each detector 4 is attached so as to be movable in a direction orthogonal to each opening surface 20, 27 so as to follow these variations in the door position and fluctuations. Therefore, the opening and closing states of each door 22, 28 can be accurately detected. In addition, it is possible to prevent each door 22, 28 from strongly hitting the detector 4, and it is possible to prevent damage to the detector 4.

[0029] In the above-described embodiment, the mounting structure 1 of the door opening / closing state detector 4 is applied to the traffic signal controller 10. However, the mounting structure of the door opening / closing state detector of the present invention can also be applied to articles other than traffic signal controllers.

[0030] Note that the above-described embodiment merely shows a typical form of the present invention, and the present invention is not limited to the embodiment. That is, various modifications can be made and implemented without departing from the gist of the present invention.

Explanation of Reference Numerals

[0031] 1 Mounting structure of door opening / closing state detector 4 Door opening / closing state detector 5 Case 10 Traffic signal controller 20 Opening surface 21 Housing 22 Main door 26 Second housing 27 Opening surface 28 Small door

Claims

1. An attachment structure of a door opening / closing state detector that is attached to a housing having an opening surface and detects the opening / closing state of a door that opens and closes the opening surface, The door is made of a magnetic material or has a magnetic component attached thereto, In the door opening / closing state detector, a magnet and a switch are housed in a case. When the door is closed and the door or the magnetic component is magnetically adsorbed to one surface of the case, and when the door is opened and the door or the magnetic component moves away from one surface of the case, the switch is provided to be switched. The case is attached to the housing so as to be movable in a direction perpendicular to the opening surface. An attachment structure of a door opening / closing state detector, characterized by the above.

2. A long hole is formed in the case, and a pin fixed to the housing side is passed through the long hole, whereby the case is attached to the housing so as to be movable in a direction perpendicular to the opening surface. The attachment structure of the door opening / closing state detector according to claim 1, characterized by the above.

3. A fixture having a plate portion on which the case is placed and a pin standing upright from the plate portion, A pressing tool that is fixed to the fixture, faces the plate portion, and positions the case between the plate portion and the pressing tool, A clearance is provided between the pressing tool and the case so that the pressing tool and the case are not in contact with each other. The attachment structure of the door opening / closing state detector according to claim 2, characterized by the above.

4. The tip side of the pin protrudes from the long hole, A hole is formed in the pressing tool through which the portion of the pin protruding from the long hole passes. The attachment structure of the door opening / closing state detector according to claim 3, characterized by the above.

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