JP2004084197A - Security lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a security lens which can not be removed from the indoor and outdoor sides. <P>SOLUTION: The security lens is composed of an outdoor-side flange section 10 as an entrance window, a male screw section 11 installed on an outer periphery and an internal cylinder 1, in which a lens system 12 is housed, an indoor-side flange section (an indoor-side end section) 20 as a peep window and an external cylinder 2 having a female screw section 21 on an internal peripheral surface. In the security lens having such a basic constitution, slittings 5A and 5B formed to the indoor-side flange section 20 of the external cylinder 2 are configured so as to function only in the screwing rotary direction Y when the extenal cylinder 2 is forwarded in the screwing direction X. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a security lens mainly configured to penetrate an entrance door or the like so that an outdoor state can be observed over a wide range from the indoor side.
[0002]
[Prior art]
As a top manufacturer of security lenses, the applicant has repeatedly improved security lenses, and in Japanese Patent Application No. 11-108273 (Japanese Patent Application Laid-Open No. 2000-297585), provided a locking mechanism for preventing removal from the outdoor side. We propose security lens equipped.
[0003]
[Problems to be solved by the invention]
In commercializing such a security lens, the applicant has come to recognize the following problems.
One of them is that the security lens attached to a guest room door of a hotel or the like is unexpectedly removed from the room side of a guest room by a guest or the like.
Second, if a strong external force is applied from the outdoor side, the locking mechanism may be destroyed.
[0004]
Therefore, an object of the present invention is to provide a security lens capable of solving the above-mentioned problems.
[0005]
[Means for Solving the Problems]
As means for achieving this object, an inner cylinder provided with a male screw portion on the outer periphery is inserted into the mounting hole of the door from the outdoor side, and screwed to an outer cylinder provided with a female screw portion on the inner periphery, In the security lens mounted so as to sandwich the door, the slit for rotating the outer cylinder provided at the indoor side end of the outer cylinder is formed substantially along the diameter of the circular indoor side end. The security lens has a jig engaging portion and a tapered portion inclined from the jig engaging portion in a direction opposite to a screwing rotation direction of the outer cylinder.
Even if a hotel guest or the like tries to rotate the outer cylinder in a direction opposite to the screwing rotation direction using coins or the like as a jig, the jig does not function due to the tapered portion.
[0006]
To achieve the above object, an inner cylinder provided with a male screw portion on the outer periphery is inserted from the outdoor side into a mounting hole of the door, and is screwed to an outer cylinder provided with a female screw portion on the inner periphery. In the security lens mounted so as to sandwich the inner cylinder, the screwed-in inner cylinder and the outer cylinder may be fixed via fixing means.
The security lens itself of the present application is not firmly fixed to the door itself. Therefore, even if the inner cylinder or the outer cylinder can be turned from the outside or the inside of the room, the inner and outer cylinders fixed by the fixing means will rotate integrally and cannot be removed.
In the present invention, the slit of the above invention may be provided, or a normal slit may be used.
[0007]
As the fixing means, a screw lock agent may be used (the invention according to claim 3).
[0008]
To achieve the above object, an inner cylinder provided with a male screw portion on the outer periphery is inserted from the outdoor side into a mounting hole of the door, and is screwed to an outer cylinder provided with a female screw portion on the inner periphery. In a security lens that is mounted so as to sandwich the female screw, the female and male screw portions are screwed and act, and a rotation stop mechanism that regulates rotation of the inner cylinder is provided, and the inside and / or outside the mounting hole of the door is provided. A reinforcing plate for reinforcing the locking mechanism was provided.
With this reinforcing plate, the mounting hole of the door can be prevented from being broken.
The reinforcing plate may be a decorative seat specifically fixed to a door.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a security lens according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view of the security lens according to the first embodiment, and FIG.
In these drawings and the drawings described later, the same components are denoted by the same reference numerals, and detailed description is omitted.
[0010]
The security lens is mounted on a double door having a so-called flash door and having a two-plate thickness, as shown in FIG. 1, and is provided on the outer flange portion 10 serving as an entrance window and on the outer periphery. From the inner cylinder 1 containing the male screw portion 11 and the lens system 12 inside, the inner flange portion (indoor end portion) 20 serving as a viewing window, and the outer cylinder 2 having the female screw portion 21 on the inner peripheral surface. Become.
[0011]
The first feature of the security lens having such a basic configuration is the configuration of the slits 5A and 5B provided on the indoor side flange portion 20 of the outer cylinder 2.
The slits 5A and 5B function only in the screwing rotation direction Y when the outer cylinder 2 is advanced in the screwing direction X.
The slits 5 </ b> A and 5 </ b> B are formed as a pair so as to substantially follow the diameter of the circular end of the indoor side flange portion 20. Then, the jig engaging portions 50A and 50B, and the tapered portions 51A and 51B inclined from the jig engaging portions 50A and 50B in a direction Z opposite to the screwing rotation direction Y of the outer cylinder 2. Is provided.
For example, when the tool 6 (hereinafter, also referred to as a jig) is used, the jig engaging portions 50A and 50B are formed by cutting the surface of the indoor side flange portion 20 substantially vertically so that the rotational force is transmitted. It is formed.
On the other hand, the tapered portions 51A and 51B are notched so as to gradually become shallow from the deep portions of the jig engaging portions 50A and 50B to the surface of the indoor side flange portion 20.
[0012]
Therefore, when the flanges 20 are arranged horizontally, the slits 5A and 5B are omitted as shown in FIG. 3A (the other slits appear symmetrically in each drawing). Is cut out in a substantially rectangular shape, but the present invention is not limited to this.
For example, as shown in FIG. 3B, horizontal jig insertion portions 52A and 52B may be provided according to the shape of the jig 6.
Also, as shown in FIG. 3C, round jig insertion portions 52A and 52B may be provided. In particular, in the case of the slits 5A and 5B, the outer cylinder 2 is hard to be removed even if coins or the like are used because of the rounding.
[0013]
According to the slits 5A and 5B, even if the outer cylinder 2 is rotated in the direction Z opposite to the screwing rotation direction Y of the outer cylinder 2 using a 10-yen coin or the like as a jig, The jig slides due to the portions 51A and 51B, and the outer cylinder 2 cannot be easily removed.
[0014]
The second feature of the security lens is that a screw lock agent is applied as a fixing means to the male and female screw portions 11 and 21 (range A in FIGS. 1 and 2) of the inner and outer cylinders 1 and 2. As shown in FIG. 2, the indoor / outdoor flange portions 10 and 20 are merely crimped around the mounting hole 30 of the outdoor side door plate 3 and the mounting hole 40 of the indoor side door plate 4 and are fixed. It is not.
Therefore, even if the outer cylinder 2 can be rotated from the indoor side, the inner cylinder 1 fixed by the screw lock agent simultaneously idles and cannot be removed.
Similarly, even if the inner cylinder 1 is rotated from the outdoor side, the outer cylinder 2 rotates at the same time, so that the inner cylinder 1 cannot be removed.
[0015]
The lens system 12 includes concave lenses 120 and 121 as objective lenses and a convex lens 122 as an eyepiece. These lenses use optical glass instead of plastic. Therefore, it is resistant to heat, is effective in fire prevention, and is hard to fog.
[0016]
The following procedure is used to mount the security lens.
Oil and the like of the male and female screw portions 11 and 21 serving as application surfaces are removed, and a screw lock agent is applied to at least the male screw portion 11 of the inner cylinder 1.
In this case, the screw lock agent is not used to firmly fix the inner and outer cylinders 1 and 2 to the door itself, but is used merely to make the inner and outer cylinders idle freely. It is not necessary to cover the entire surface of the units 11 and 21.
Next, the inner cylinder 1 is inserted into the mounting hole 30 of the outdoor door plate 3 of the double door from the outdoor side, while the outer cylinder 2 is inserted into the mounting hole 40 of the indoor door plate 4 from the indoor side.
The screwing of both is performed by setting a predetermined jig 6 on the slits 5A and 5B and rotating the indoor flange portion 20 by Y. In addition, when it becomes difficult to screw in by applying the screw lock agent, a wrench or the like is used.
[0017]
As another fixing means, for example, the screw grade may be changed in the screwing range A of the male and female screw portions 11 and 21 so that the screwing becomes more difficult.
[0018]
The above configuration may be applied to the security lens for the single door 3A in FIG.
In this case, the same effects as those of the above embodiment can be obtained.
[0019]
Next, a third embodiment of the security lens will be described.
The feature of this security lens is that when the female and male screw portions 11 and 12 of the inner and outer cylinders 1 and 2 are screwed, a locking mechanism for restricting rotation of the inner cylinder 1 is provided. The point is that a reinforcing plate 7 for reinforcing the detent mechanism is provided inside the mounting hole 30.
The locking mechanism shown in FIG. 5 is configured such that a part of the flange seat portion 13 of the outdoor side flange portion 10 is engaged with the engaged portion 130 which is notched in a moon shape, while the mounting hole 30 corresponding to this shape is provided. It consists of a joint 31.
In the same configuration, when the thickness of the engaged portion 130 is substantially the same as the thickness of the outdoor door plate 3, when an unexpected external force is applied to the inner cylinder 1 and the inner cylinder 1 is rotated, the mounting hole 30 is broken. May be done.
Therefore, in this embodiment, the engaged portion 130 is made thicker (L1), and the reinforcing plate 7 is fixed to the back side of the outdoor door plate 3 so as to have a thickness of L2 that can correspond to L1.
As a result, even if an unexpected external force is applied to the outer cylinder 1, the mounting hole 30 can withstand the external force.
[0020]
The shape of the engaged portion 130 is not limited to that shown in FIG. 5, but may be a shape in which both sides are cut out in a moon shape as shown in FIG. , May be polygonal.
Further, the slit may be that of each of the above embodiments.
[0021]
In this security lens, at the same time when the seat 13 is inserted into the mounting hole 30 of the door plate 3, the engaging portion 31 of the mounting hole 30 and the engaged portion 130 of the inner cylinder 1 are engaged, The rotation of the male screw portion 11 is restricted, and the inner cylinder 1 cannot be removed from the outdoor side.
Therefore, the structure is such that the function as a fire door can be enhanced not only for security but also for fire protection. In addition, the locking mechanism can be manufactured at low cost, and the mounting method is extremely simple.
Other configurations may be the same as those of the above-described embodiments, and in that case, the same operation and effect can be obtained.
[0022]
As shown in FIG. 7, the decorative seat 8 fixed to the outdoor side of the outdoor side door plate 3 may be replaced with a reinforcing plate 7 or may be mounted in an overlapping manner.
An engaging portion 81 substantially similar to the engaging portion 31 is formed in the insertion hole 80 of the decorative seat 8, and the decorative seat 8 is fixed to the outdoor side of the outdoor side door plate 3. By adding the thickness of the decorative seat 8 to the thickness of the outdoor door plate 3, the strength of the mounting hole 31 is reinforced.
Other configurations may be the same as those of the above-described embodiments, and in that case, the same operation and effect can be obtained.
[0023]
【The invention's effect】
According to the invention as set forth in claim 1, even if a guest or the like at a hotel or the like tries to rotate the outer cylinder in a direction opposite to the screwing rotation direction using a coin or the like as a jig, the tapered portion causes Jig does not work.
Therefore, it is possible to prevent the accidental removal of the security lens from the indoor side.
[0024]
According to the second aspect of the present invention, even if the inner cylinder or the outer cylinder can be turned from the outside or the inside of the room, the inner and outer cylinders fixed by the fixing means rotate integrally. And cannot be removed.
Therefore, it is possible to prevent the accidental removal of the security lens from the inside and outside of the room.
[0025]
According to the third aspect of the present invention, since the screw locking agent is used as the fixing means, the inner and outer cylinders can be easily and inexpensively fixed.
[0026]
According to the fourth aspect of the present invention, it is possible to prevent the mounting hole of the door from being broken by the reinforcing plate.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a security lens according to a first embodiment,
FIG. 2 is a cross-sectional view of the same mounting;
3A is a plan view of an indoor side flange portion of the security lens, FIG. 3B is a plan view of another example, and FIG. 3C is a plan view of another example.
FIG. 4 is a side view of a security lens according to a second embodiment,
FIG. 5 is an exploded perspective view of a security lens according to a third embodiment,
FIG. 6 is an explanatory view of the main part,
FIG. 7 is an exploded perspective view of a security lens according to another example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inner cylinder 10 Outdoor flange part 11 Male screw part 12 Lens system 13 Seat part 130 Engagement part 120, 121 Objective lens 122 Concave lens 2 Outer cylinder 20 Indoor flange part 21 Female screw part 3 Outdoor door plate 30 Mounting hole 31 Engaging part 4 Indoor side door plate 40 Mounting hole 3A Door plate 30A Mounting hole 5A, 5B Slot 50A, 50B Jig engaging part 51A, 51B Taper part 6 Tool 52A, 52B Jig insertion part 7 Auxiliary plate 8 Decorative seat

Claims (4)

A security lens that inserts an inner cylinder with an external thread on the outer periphery into the mounting hole of the door from the outside of the door, and screws it to an outer cylinder with an internal thread on the inner periphery to mount the door so as to sandwich it. At
A slot for rotating the outer cylinder provided at the indoor side end of the outer cylinder has a jig engaging portion formed substantially along the diameter of the indoor side end formed in a circular shape, and a jig thereof. A security lens comprising a tapered portion inclined from an engagement portion in a direction opposite to a screwing rotation direction of the outer cylinder. The security lens according to claim 1, wherein the screwed inner cylinder and the outer cylinder are fixed via fixing means. The security lens according to claim 2, wherein the fixing means is a screw lock agent. A security lens that inserts an inner cylinder with an external thread on the outer periphery into the mounting hole of the door from the outside of the door, and screws it to an outer cylinder with an internal thread on the inner periphery to mount the door so as to sandwich it. At
A locking mechanism that acts when the male and female screw portions are screwed and that provides a locking mechanism for restricting rotation of the inner cylinder is provided, and a reinforcing plate for reinforcing the locking mechanism is provided inside or / and outside the mounting hole of the door. Security lens characterized by being provided.

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