JP2013207227A - Security device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability of fitting a cover of a recognition portion in a security device provided with the recognition portion on the front of a fitting base body.SOLUTION: A slope 26 is formed on a rear end portion of a boss portion 23 projected from an inner surface of each of right and left side walls 17 of a cover 12. When the cover 12 is arranged on the front of the fitting base body 3, the slope 26 contacts with an overhang portion of an equipment outer shell of the recognition portion to elastically spread both the right and left side walls 17, and the boss portion 23 passes the overhang portion, so both the right and left walls 17 need not be spread with both the hands and the operability is improved. Further, a counterbore hole 28 for accommodating the head 14a of a fitting screw 14 is formed in a rear surface portion of the fitting base body 3, thereby the length of a complete screwing portion of the fitting screw 14 with respect to a screwed hole 25 is never shortened in spite of the formation of the slope 26.

Description

  The present invention relates to a security device including a recognition unit that recognizes a suspicious person.

  This type of security device has a mounting base that is attached to the wall of a building, and a recognition unit is provided on the front surface of the mounting base. The recognizing unit houses, for example, a device such as a communication device (tag reader) or a camera that communicates with an individual identification terminal (RFID tag) in a device outer shell.

  The recognition unit has a cover. The cover has an open rear surface, and when being attached to the attachment base, the cover is pressed against the front surface of the attachment base from the front so as to cover the device outer shell of the recognition unit, and is fixed. The cover has a hood portion at the top, and a portion below the hood portion is a guard portion having a lower surface and a front surface in addition to the rear surface, that is, a guard portion including a pair of left and right side walls. The hood part covers the upper part of the device outer shell from the top, front and both left and right sides, and the guard part covers the lower part of the device outer shell from both the left and right sides.

  The cover has a boss protruding from the inner surface of the rear end portion, and is fastened and fixed to the front surface of the mounting base by screwing a mounting screw passed from the back side of the mounting base to the boss. In this case, a gasket is disposed on the front surface of the mounting base, and when the cover is fastened and fixed, the gasket is sandwiched between the mounting base and the cover to seal between the two.

  Although not a security device, Patent Documents 1 and 2 each disclose a component mounting structure by snap-fit coupling.

JP-A-7-293080 JP 2003-269417 A

The device shell of the recognition unit has overhangs on both the left and right sides. On the other hand, the distance between the left and right side walls of the guard part of the cover is set to be the same as or slightly larger than the lateral width of the overhanging part of the device outer shell of the recognition part to cope with the demand for slimming.
The boss portion of the guard portion is formed so as to protrude from the inner surfaces of the left and right side walls of the guard portion. For this reason, when covering a device outer shell from the front when attaching a cover, the boss | hub part of a guard part will hit the overhang | projection part of a device outer shell on the way. Therefore, the cover is placed on the device outer shell from the front while the left and right side walls of the guard portion are spread with both hands so that the boss portion does not hit the overhanging portion of the device outer shell. Then, after the boss part has passed through the overhanging part, remove the force of the fingers to release the left and right side walls of the guard part, and cover the front surface of the mounting base and screw the mounting screw onto the boss part. ing.

  However, in this case, when the cover is put on the outer shell of the equipment, the left and right side walls of the guard part must be pushed and spread with both hands, so the workability is poor, and the guard part is placed inside the left and right side walls of the guard part. There is a risk that fingers may be pinched between the outer shell of the device and the left and right side walls of the guard.

  If snap-fit coupling is employed in the cover mounting structure, there is no need to spread the left and right side walls. However, the gasket is made of synthetic rubber, and there is a situation where a sufficient sealing effect cannot be obtained unless it is strongly pressed between the mounting base and the cover. There is a risk that the cover may come off without being able to endure. For this reason, it is difficult to change the cover attachment from screwing to snap-fit connection.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a security device that can improve workability without the need to spread the left and right side walls when the cover is attached. It is in.

  In the present invention, a slope is formed on at least a portion of the rear end portion of the boss portion formed to protrude from the inner surfaces of the left and right side walls of the cover so as to fall within an interval of the same width as the width of the overhang portion of the device outer shell of the recognition portion. When the cover is formed and disposed on the front surface of the mounting base, the right and left side walls of the cover are elastically expanded by allowing the slope to come into contact with the overhanging portion, and the boss portion is allowed to pass through the overhanging portion. Therefore, it is not necessary to open the left and right side walls of the cover with both hands, improving workability.

  Also, a counterbore hole for sinking the head of the mounting screw is formed in the rear surface portion of the mounting base, and the depth of the counterbore hole is a screw hole that opens from the rear end surface on the lower surface side of the cover to the inclined surface. The length of the complete threaded portion with respect to the screwing hole of the mounting screw is not shortened by the formation of the slope. It is possible to sufficiently counter the tightening force of the mounting screw.

Sectional drawing of the principal part which shows one Embodiment of this invention Perspective view of boss Sectional drawing which shows the state change at the time of attaching an upper cover to an attachment base Bottom view of top cover Perspective view showing the top cover removed from the mounting base Perspective view showing the top cover attached to the mounting base Side view of the entire security device Front view

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 7 and 8, the security device 1 is provided with a sensor 4 and a recognition unit 5 on the front portion (front surface) of the mounting base 3 attached to the outer wall surface 2 of the building. In the security device 1, the front and back (front and back), when attached to the outer wall surface 2, the side that becomes the outer wall surface 2 side is the rear (back), and the opposite side is the front (front). In the left and right, when the security device 1 is viewed from the front side, the left hand side is the left and the right hand side is the right.

The sensor 4 is provided with, for example, a laser radar (not shown) composed of a laser light emitting part and a reflected light detecting part in the sensor case 6, and emits laser light horizontally toward the front detection area. Then, an intruder into the detection area is detected by detecting the reflected light.
The recognition unit 5 is arranged on the upper side of the sensor 4 and accommodates, for example, a tag reader (communication device) and a camera as a recognition device in the device outer shell 7. When an intruder is detected by the sensor 4, the tag reader outputs a radio wave communicating with the RFID tag (individual recognition terminal), and when receiving a response radio wave from an RFID tag having pre-registered ID information, Determines that the person is not a suspicious person. In addition, the camera captures an image in the detection area, and the captured image is displayed on a monitor installed in the building and recorded in a recording device.

  The device outer shell 7 of the recognition unit 5 has a flat rectangular box-shaped upper storage case 9 having a lateral width and a longitudinal depth larger than the lower storage case 8 on a lower storage case 8 that is long in the vertical direction. Configured. A tag reader is stored in the upper storage case 9, and a camera is stored in the lower storage case 9.

  As shown in FIGS. 3, 5, and 6, the lower storage case 8 has a lid case 11 that forms a substantially semicircular front part on a square case body 10 at the rear part (upper part in FIGS. 3, 5, and 6). The shape is covered with a kamaboko shape as a whole. The left outer surface and the right outer surface of the lower storage case 8 are parallel to each other, and overhanging portions 8a and 8b extending in the vertical direction are laterally provided in the middle of the left outer surface and the right outer surface in the front-rear direction. Is formed to protrude. A gap G <b> 1 (see FIG. 3A) is formed between the both overhang portions 8 a and 8 b and the front surface of the mounting base 3.

  As shown in FIGS. 7 and 8, an upper cover 12 and a lower cover 13 are disposed at the front portion of the mounting base 3. The upper cover 12 is of the recognition unit 5 and is fixed to the mounting base 3 by mounting screws 14 described later. The lower cover 13 is of the sensor 4 and is attached to the mounting base 3 by snap-fit coupling. The snap-fit coupling is a relationship in which a plurality of elastic engagement claws protruding from one of the mounting base 3 and the lower cover 13 (for example, the lower cover 13) are formed on the other (for example, the mounting base 3). It has a well-known configuration in which it is elastically engaged with the joint hole and coupled.

As shown in FIG. 5, the upper cover 12 includes an upper hood portion 15 and a lower guard portion 16. The upper surface of the upper cover 12 is open. When the upper cover 12 is attached to the attachment base 3, the upper cover 12 is applied to the front surface of the attachment base 3 so as to cover the device outer shell 7 of the recognition unit 4 from the front.
The hood 15 covers the entire upper storage case 9 of the device outer shell 7, and a part of the lower surface is opened in accordance with the outer shape of the lower storage case 8 in addition to the rear surface. The guard portion 16 includes a pair of left and right side plate portions 17 and 18 that extend downward from the left and right sides of the rear half of the open portion 15a on the lower surface of the hood portion 15, and the left side plate portion 17 is disposed at the front of the lower end portion. In addition, a semicircular bridge portion 19 that connects the right side plate portions 18 is formed. Accordingly, at least the lower surface, in this embodiment, the lower surface and the front surface are opened in addition to the rear surface of the guard portion 16, and the lower housing case 8 is sandwiched from the left and right sides by the left plate portion 17 and the right plate portion 18. It comes to cover.

  A gasket 20 (see FIG. 1) made of, for example, synthetic rubber is attached to the front surface of the attachment base 3 and the upper portions of the overhang portions 8a and 8b of the lower storage case 8 of the recognition portion 5. The gasket 20 is shown only on the front surface of the mounting base 3. When the upper cover 12 is fastened and fixed to the mounting base 3 by the mounting screws 14, the peripheral edge portion of the rear surface of the hood portion 15, the left side plate portion 17 of the guard portion 16, and the rear end portions of the right side plate portion 18 are attached to the mounting base 3. And the front end edges of the left side plate portion 17 and the right side plate portion 18 of the guard portion 15 are pressed by the gaskets of the overhanging portions 8 a and 8 b of the lower storage case 8. Thereby, the space between the upper cover 12, the mounting base 3, the left and right side plate portions 17 and 18, and the lower storage case 8 is sealed, and rainwater intrusion into the upper cover 12 is prevented.

  On the other hand, as shown in FIGS. 7 and 8, the lower cover 13 has a form in which a large hood portion 22 is formed at the lower end portion of the body portion 21, and the rear surface, the upper surface, and the lower surface are all open. Yes. The lower cover 13 is attached so as to cover the upper part of the sensor case 6 of the sensor 4 so that the upper part of the body part 21 overlaps the lower end part of the upper cover 12, for example, where the bridge part 19 is formed. It is attached to the substrate 3.

  Now, the distance D1 between the left side plate portion 17 and the right side plate portion 18 constituting the guard 16 of the upper cover 12 is set to be slightly larger than the lateral width W of the left and right protruding portions 8a, 8b of the lower storage case 8. . By setting the distance D1 to be slightly larger than the lateral width W, an increase in the lateral width of the upper cover 12 is prevented. The interval D1 may be the same as the width W.

  A boss portion 23 having a predetermined length extending from the rear end in the front direction is formed on the inner surface of the left side plate portion 17 and the right side plate portion 18 of the guard 16 near the lower surface. In this case, the longitudinal length L (see FIG. 1) of the boss portion 23 is set to be equal to or less than the gap G1 between the overhang portions 8a and 8b and the front surface of the mounting base 3. In addition, boss portions 24 having a predetermined length extending in the forward direction from the rear end portion are formed to protrude at a plurality of locations on the inner peripheral surface of the hood portion 22. As shown in FIGS. 1 and 2, screw holes 25 are formed in the boss portions 23 and 24. Only the screw holes 25 of the boss portion 23 are shown. The screw hole 25 is a circular hole, and the mounting screw 14 is a self-tapping screw that forms a thread valley on the inner surface of the screw hole 25 by itself.

  The protrusion height h from the inner surfaces of the left and right side plate portions 17 and 18 of the boss portion 23 is the same as that of the left and right side plate portions 17 and 18 in FIG. It is determined to be a size larger than a gap size g generated between the left and right overhang portions 8a and 8b. Accordingly, the distance D2 (see FIG. 4) between the boss portion 23 of the left side plate portion 17 and the boss portion 23 of the right side plate portion 18 is narrower than the lateral width W of the lower storage case 8 at the overhang portions 8a and 8b. . For this reason, when the upper cover 12 is put on the device outer shell 7, the rear ends of the boss portions 23 of the left and right side plate portions 17 and 18 interfere with the overhang portions 8a and 8b.

  This interference portion, that is, the portion of the rear end portion of the boss portion 23 of the left and right side plate portions 17, 18 that falls within the interval of the same width as the lateral width W of the overhang portions 8 a, 8 b faces inward of the guard portion 16. And is formed on a slope 26 that is inclined forward (upward in FIGS. 1 and 2). The inclined surface 26 may be formed on the entire rear end portion of the boss portion 23. In short, the inclined surface 26 only needs to be formed in a portion that falls within an interval having the same dimension as the lateral width W of the projecting portions 8a and 8b. .

  A through hole 27 through which the mounting screw 14 is passed is formed in the front wall 3 a of the mounting base 3. Further, a counterbore hole 28 concentric with the through hole 27 is formed on the back surface of the front wall 3a. The counterbore 28 is for sinking the head 14 a of the mounting screw 14. The counterbore hole 28 may be provided only for the mounting screw 14 of the boss portion 23 of the left and right side plate portions 17 and 18 of the guard portion 16.

  The depth F of the counterbore 28 is determined in relation to the screw hole 25 that opens on the slope 26 of the boss portion 23. That is, when the edge portion farthest from the rear end surface M of the guard portion 16 among the peripheral portions of the screw holes 25 opened in the inclined surface 26 is a point P, the depth F is the distance f from the rear end surface M to the point P. It is determined to be the same size or larger.

  Next, an operation when the upper cover 12 is attached to the attachment base 3 in the above configuration will be described. First, the mounting base 3 is placed on a work table (not shown) so that the front surface faces upward. Then, the sensor case 6, the lower storage case 8, and the upper storage case 9 are attached to the attachment base 3 on the work table, and the gasket 20 is attached to the front surface of the attachment base 3 and the front surfaces of the overhanging portions 8a and 8b of the lower storage case 8. . Subsequently, the upper cover 12 is put on the device outer shell 7 (the lower storage case 8 and the upper storage case 9) from the front (from the upper side with respect to the mounting base 3 placed on the work table).

  In this covering process, the left and right boss portions 23 of the guard portion 16 approach the projecting portions 8a and 8b of the lower storage case 8 from above as shown in FIG. As shown in b), the rear end portions of the left and right boss portions 23 abut on the projecting portions 8a and 8b. At this time, since the abutting portion is the portion of the slope 26 in the rear end portion of the boss portion 23, if the upper cover 12 is further covered thereafter, it moves downward (approaching the mounting base 3). As a result, the force in the expanding direction is applied to the left and right side plate portions 17 and 18 by the action of the slope 26. As a result, the left and right side plate portions 17 and 18 are elastically expanded and deformed.

In this case, since the guard portion 16 opens the lower surface in addition to the rear surface, the boss portion 23 exists on the open end side of the lower surfaces of the left and right side plate portions 17, 18. The plate portions 17 and 18 are easily expanded. In this embodiment, since the front surface (upper surface in FIG. 3) of the guard portion 16 is also opened, the left and right side plate portions 17 and 18 are further easily expanded.
Thereafter, as the upper cover 12 moves downward, the degree of expansion of the left and right side plate portions 17 and 18 increases, and the left and right boss portions 23 eventually become extended portions 8a and 8b as shown in FIG. Get on. Then, as shown in FIG. 3D, when the left and right boss portions 23 get over the projecting portions 8a and 8b, the left and right side plate portions 17 and 18 are restored to the original state. It enters into the gap G1 between the overhang portions 8a, 8b and the mounting base 3.

  Then, the mounting base 3 is turned upside down, the mounting base 14 is brought into contact with the rear surface of the upper cover 12, the mounting screw 14 is passed through the through hole 27, and the screw holes 25 of the boss portions 23 and 24 of the upper cover 12 are inserted. The upper cover 12 is fixed to the mounting base 3 by screwing. At this time, the head portion 14 a of the mounting screw 14 screwed into the boss portion 23 of the guard portion 16 sinks into the counterbore hole 28.

When the upper cover 12 is fixed to the mounting base 3 by the tightening force of the mounting screw 14, the gasket 20 is compressed by the tightening force of the mounting screw 14 and exhibits a sealing effect.
As described above, according to the present embodiment, when the upper cover 12 is put on the device outer shell 7, the upper cover 12 is naturally expanded by the action of the inclined surfaces 26 formed on the left and right boss portions 23, and the lower storage case 8 is stretched. Passing through the exit portions 8a and 8b is allowed. For this reason, it is not necessary to perform the operation of pushing the left and right side plate portions 17 and 18 with both hands, the workability of attaching the upper cover 12 is improved, and the fingers are connected to the side plate portions 17 and 18 and the overhang portions 8a and 8b. There is no fear of being caught between.

By the way, it is necessary to form more than a predetermined number of complete threads on the inner peripheral surfaces of the screw holes 25 of the boss part 24 of the hood part 15 and the boss part 23 of the guard part 16 at least 360 degrees (one turn). is there. If the complete screw thread is less than the predetermined number, when the upper cover 12 is strongly tightened by the mounting screw 14, the thread is damaged by the tightening force.
In this regard, in this embodiment, since the slope 26 is formed on the boss portion 23 of the guard portion 16, the inner peripheral surface of the screw hole 25 when the mounting screw 14 is screwed into the screw hole 25. As for the thread formed in the part, only the incomplete thread of less than one round (360 degrees) is formed in the portion opened to the slope 26.

  For this reason, assuming that the counterbore hole 28 is not provided on the back side of the fixed portion of the guard portion 16 of the mounting base 3 as in the fixed portion of the hood portion 15, the boss portion 24 of the hood portion 15 is When the mounting screws 14 having the same length are used, when the mounting screws 14 are screwed onto the boss portions 23 of the guard portion 16, the number of complete thread threads continuous over 360 degrees is insufficient, and the mounting screws 14 are tightened. Sometimes, it cannot withstand the tightening force, and the complete thread as well as the incomplete thread may be damaged.

  However, in this embodiment, the counterbore 28 is provided on the back side of the fixed portion of the guard portion 16 of the mounting base 3, so that when the mounting screw 14 is screwed into the screwing hole 25 of the boss portion 23, The length of the mounting screw 14 that can protrude from the front surface of the base 3 is longer by the depth dimension of the counterbore 28 than when the counterbore 28 is not provided. The depth of the counterbore hole 28 is equal to or greater than the distance f from the rear end face M of the guard portion 16 to the point P farthest from the peripheral edge of the screw hole 25 of the counterbore hole 28 on the slope 26. The mounting screw 14 can penetrate deeper into the screw hole 25 of the boss portion 23, and the number of complete threads that can be formed in the screw hole 25 is the same as that of the boss portion 24 of the hood portion 15. More than the number of mountains. Therefore, there is no possibility that the thread formed in the screw hole 25 of the boss portion 23 is damaged by the tightening force of the mounting screw 14.

The present invention is not limited to the embodiment described above and shown in the drawings, and can be expanded or changed as follows.
The guard portion 15 of the upper cover 12 may have a front wall portion. However, the front wall portion needs to be formed of a transparent material so that the camera can photograph the front.
The recognition unit 5 may be provided with only one of the communication device and the camera. As the recognition device, a device other than the communication device and the camera may be employed.
The sensor for detecting a suspicious person is not limited to a sensor that emits and detects a laser beam, and may be configured to emit and detect a radio wave.
A screw thread may be formed in the screw hole 25 in advance.

  In the drawings, 3 is a mounting base, 4 is a sensor, 5 is a recognition unit, 7 is an outer shell of the device, 8 is a lower storage case, 9 is an upper storage case, 12 is an upper cover (cover), 13 is a lower cover, 15 is Hood part, 16 guard part, 17 left side plate part, 18 right side plate part, 20 gasket, 23 boss part, 25 screw hole, 26 slope, 27 through hole, 28 counterbore hole Show.

Claims (1)

An attachment base that is attached to the wall surface such that the rear surface side is the wall surface side;
A recognition unit that is provided on the front surface of the mounting base and houses a recognition device for recognizing a suspicious person in a device outer shell having protruding portions on the left and right sides;
A cover of the recognition unit, wherein at least the lower surface is opened in addition to the rear surface, and the cover is disposed on the front surface of the mounting base so as to cover the device outer shell of the recognition unit from the front;
Boss portions formed on the inner surfaces of the left and right side walls on the lower surface side of the cover so as to protrude forward from the rear ends of the left and right side walls;
A screw hole formed in the boss portion so as to extend forward from the rear end;
A mounting screw having a predetermined length that passes through a through hole formed in the mounting base from the rear side of the mounting base, is screwed into the screwing hole of the cover, and fixes the cover to the mounting base. ,
In the security device in which the distance dimension between the left and right boss parts is determined to be narrower than the width dimension in the projecting part of the device outer shell,
A slope is formed in at least a portion of the rear end portion of the left and right boss portions that falls within the same dimension as the lateral width of the overhanging portion of the device outer shell, and the cover is disposed on the front surface of the mounting base. When the slope is in contact with the overhanging portion, the left and right side walls of the cover are elastically expanded to allow the boss portion to pass through the overhanging portion, and
A counterbore for sinking the head of the mounting screw is formed on the rear surface of the mounting base, from the rear end surface of the cover to the farthest edge of the peripheral edge of the screw hole that opens to the inclined surface. A security device formed to have a depth equal to or greater than the distance.

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