JP3631227B2 - Security lens - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a security lens that is configured so as to mainly be installed through a front door or the like so that the state of the outdoor can be observed over a wide range from the indoor side.
[0002]
[Prior art]
The applicant, as a top manufacturer of security lenses, has repeatedly improved security lenses. In Japanese Patent Application No. 11-108273 (Japanese Patent Application Laid-Open No. 2000-297583), the applicant has provided a rotation stop mechanism that prevents removal from the outdoor side. Proposes security lenses 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 the unexpected occurrence that a security lens attached to a guest room door of a hotel or the like is removed from the room interior of the guest room by a guest or the like.
The second is that, if a strong external force is applied from the outdoor side, the rotation stop mechanism may be destroyed.
[0004]
Then, this invention aims at providing the crime prevention lens which can solve the said subject.
[0005]
[Means for Solving the Problems]
As means for achieving this object, an inner cylinder provided with a male screw part on the outer periphery is inserted into the door mounting hole from the outside of the door, and is screwed to an outer cylinder provided with a female screw part on the inner periphery. in security lens mounting so as to sandwich the door, slitting for outer cylinder rotary provided on the indoor side end portion of the outer cylinder, pairs Ryaku沿Migihitsuji the diameter of the interior side end portion formed in a circular shape A round jig insertion portion is provided in accordance with the shape of the jig used for screwing the inner cylinder and the outer cylinder, and the outer cylinder is screwed from the jig insertion section. The inner cylinder is provided with a rotation stop mechanism that includes a taper portion inclined in a direction opposite to the wearing rotation direction, and that acts when the female and male screw portions are screwed together, and that restricts the rotation of the inner cylinder. And the female screw portion of the outer cylinder are fixed to each other via a screw lock agent, and the rotation stop mechanism is a flange seat of the outdoor flange portion. The engaging portion is cut out in a moon shape, and on the other hand, the engaging portion of the mounting hole corresponding to this shape, and the rotation stop mechanism is reinforced inside and / or outside the mounting hole. The reinforcing plate is provided, and an engaging portion that is substantially the same as the engaging portion is formed on the reinforcing plate, and the thickness of the engaged portion corresponds to the thickness of the reinforcing plate and the door. A crime prevention lens (the invention of claim 1) is characterized .
[0006]
Even if a guest of a hotel or the like tries to rotate the outer cylinder in the direction opposite to the screwing rotation direction using a coin or the like as a jig, the jig does not function.
[0007]
Since the male screw portion of the inner cylinder and the female screw portion of the outer cylinder are fixed via a screw lock agent, the security lens of the present application itself is not firmly fixed to the door itself. Therefore, even if the inner cylinder or the outer cylinder can be rotated from the outdoor side or the indoor side, the inner and outer cylinders fixed by the screw lock agent will rotate together and cannot be removed.
In addition to the above effects, the reinforcing plate can prevent the door mounting hole from being broken.
[0008]
As the rotation stop mechanism, a part of the flange seat portion of the outdoor flange portion includes an engagement portion cut out in a moon shape, and on the other hand, an engagement portion of the mounting hole corresponding to this shape, An engaging portion substantially the same as the engaging portion is formed in the insertion hole of the decorative seat fixed outside the mounting hole, and the thickness of the engaged portion is made to correspond to the plate thickness of the decorative seat and the door. It is also possible to use a security lens characterized in that (Invention of Claim 2).
[0009]
DETAILED DESCRIPTION OF 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. 2 is a sectional view of the same.
In these drawings and in each drawing described later, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.
[0010]
The security lens is attached to a double door having a thickness of two plates called a so-called flash door, and as shown in FIG. From the inner cylinder 1 that houses the male thread portion 11 and the lens system 12 therein, the indoor flange portion (inner side end portion) 20 that serves as a viewing window, and the outer cylinder 2 that includes the female thread portion 21 on the inner peripheral surface. Become.
[0011]
In the security lens having such a basic configuration, the first feature is the configuration of the slits 5A and 5B provided in the indoor 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 5A and 5B are formed in pairs so as to substantially follow the diameter of the circular end portion of the indoor flange portion 20. Then, jig engaging portions 50A and 50B, and taper portions 51A and 51B inclined from the jig engaging portions 50A and 50B in the direction Z opposite to the screwing rotation direction Y of the outer cylinder 2, respectively. Is provided.
The jig engaging portions 50A and 50B are formed by cutting the surface of the indoor flange portion 20 substantially vertically so that the rotational force is transmitted when, for example, a tool 6 (hereinafter also referred to as a jig) is used. Formed.
On the other hand, the taper portions 51A and 51B are cut out so as to gradually become shallower from the deep portions of the jig engaging portions 50A and 50B to the surface of the indoor flange portion 20.
[0012]
Therefore, the slits 5A and 5B are omitted when the flange portion 20 is viewed horizontally as shown in FIG. 3 (a) (in each figure, the other slit appears symmetrically). However, this is not limited to this.
For example, as shown in FIG. 3B, horizontal jig insertion portions 52A and 52B may be provided in accordance with the shape of the jig 6.
Further, as shown in FIG. 5C, round jig insertion portions 52A and 52B may be provided. In particular, in the case of these slits 5A and 5B, the outer cylinder 2 is difficult to be removed even if coins or the like are used because they are round.
[0013]
According to these 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 taper A jig | tool slips by part 51A, 51B, and the outer cylinder 2 cannot be removed easily.
[0014]
The second feature of this security lens is that a screw lock agent is applied as a fixing means to the male and female threaded 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 outer flange portions 10, 20 are merely crimped around the mounting hole 30 of the outdoor door plate 3 and the mounting hole 40 of the indoor door plate 4, and are fixed. I don't mean.
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 rotates idly, so that the outer cylinder 2 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 and effective in terms of fire prevention, and is hardly cloudy.
[0016]
The security lens is attached by the following procedure.
The oil and the like of the female and male threaded portions 11 and 21 serving as application surfaces are removed, and a screw lock agent is applied to at least the male threaded 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 simply used to rotate freely. It is not necessary to cover the entire surface of the parts 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 two screws are screwed by setting a predetermined jig 6 in the slits 5A and 5B and rotating the indoor flange portion 20 in the Y direction. Note that a wrench or the like is used when screwing becomes difficult due to the application of the screw lock agent.
[0017]
As other 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 is reluctant.
[0018]
In addition, you may apply the above structures to the security lens for single door 3A of FIG.
In this case, the same effect is obtained with the same configuration as in the above embodiment.
[0019]
Next, a third embodiment of the security lens will be described.
The security lens is characterized by the fact that the male and female screw portions 11 and 12 of the inner and outer cylinders 1 and 2 are screwed together and a rotation stop mechanism for restricting the rotation of the inner cylinder 1 is provided. The reinforcing plate 7 is provided on the inner side of the mounting hole 30 to reinforce the rotation stop mechanism.
The rotation stop mechanism shown in FIG. 5 has a portion of the flange seat portion 13 of the outdoor flange portion 10 that is engaged with the engagement portion 130 that is cut out in a moon shape, and the attachment hole 30 that corresponds to this shape. It consists of a joint part 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, the mounting hole 30 is destroyed when an unexpected external force is applied to the inner cylinder 1 and rotated. There is a fear.
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 L2 corresponding 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]
Note that the shape of the engaged portion 130 is not limited to that in FIG. 5, and may be a shape in which both sides are cut into a moon shape as shown in FIG. A polygonal shape may be used.
Further, the slot may be the one in each of the above embodiments.
[0021]
In this security lens, the seat portion 13 is inserted into the mounting hole 30 of the door plate 3, and 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, it has a structure that can enhance the function as a fire door not only in terms of effectiveness in crime prevention but also in terms of fire prevention. In addition, the rotation stop mechanism can be made at a low cost, and the mounting method is extremely simple.
About another structure, you may make it the same as that of each said embodiment, and there exists a same effect in that case.
[0022]
As shown in FIG. 7, the decorative seat 8 fixed to the outdoor side of the outdoor door plate 3 may be replaced with a reinforcing plate 7 or may be attached in an overlapping manner.
An engaging portion 81 substantially the same as 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 door plate 3. When the plate thickness of the decorative seat 8 is added to the plate thickness of the outdoor door plate 3, the strength of the mounting hole 31 is reinforced.
About another structure, you may make it the same as that of each said embodiment, and there exists a same effect in that case.
[0023]
【The invention's effect】
According to the present invention, even if a guest of a hotel or the like tries to rotate the outer cylinder in the direction opposite to the screwing rotation direction using a coin or the like as a jig, the jig does not function due to the tapered portion. .
Therefore, it is possible to prevent the unexpected occurrence that the security lens is removed from the indoor side.
[0024]
Even if the inner cylinder or the outer cylinder can be rotated from the outdoor side or the indoor side, the inner and outer cylinders fixed by the screw lock agent will rotate together and cannot be removed.
Therefore, it is possible to prevent the unexpected occurrence that the security lens is removed from the outside of the room.
[0025]
Moreover, destruction of the door mounting hole can be prevented by the reinforcing plate or the decorative seat.
[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 sectional view of the same mounting,
3A is a plan view of the indoor flange portion of the security lens, FIG. 3B is a plan view according to another example, and FIG. 3C is a plan view according to 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 diagram of the main part,
FIG. 7 is an exploded perspective view of a security lens according to another example.
DESCRIPTION OF SYMBOLS 1 Inner cylinder 10 Outdoor side flange part 11 Male thread part 12 Lens system 13 Seat part 130 Engaged part 120,121 Objective lens 122 Concave lens 2 Outer cylinder 20 Indoor side flange part 21 Female thread part 3 Outdoor door plate 30 Mounting hole 31 engaging portion 4 indoor side door plate 40 mounting hole 3A door plate 30A mounting hole 5A, 5B slot 50A, 50B jig engaging portion 51A, 51B taper portion 6 tool 52A, 52B jig insertion portion 7 auxiliary plate 8 Ornament

Claims (2)

A security lens that is attached so that the inner cylinder with the external thread provided on the outer periphery is inserted into the mounting hole of the door from the outside of the door and screwed with the outer cylinder with the internal thread provided on the inner periphery so as to sandwich the door In
Slitting for outer cylinder rotary provided on the indoor side end portion of the outer cylinder is formed in pairs Ryaku沿Migihitsuji the diameter of the interior side end portion formed in a circular shape, and said inner cylinder A round jig insertion part is provided in accordance with the shape of the jig used for screwing the outer cylinder , and the jig insertion part is inclined in the direction opposite to the screwing rotation direction of the outer cylinder. It consists of a tapered part attached,
Provided with a rotation stop mechanism that acts when the male and female screw portions are screwed together, and restricts the rotation of the inner cylinder,
While fixing the male screw portion of the inner cylinder and the female screw portion of the outer cylinder via a screw lock agent,
The rotation stop mechanism comprises an engaged portion in which a part of the flange seat portion of the outdoor flange portion is cut out in a moon shape, and on the other hand, an engagement portion of the mounting hole corresponding to this shape,
A reinforcing plate that reinforces the rotation stop mechanism is provided inside or / and outside the mounting hole,
Forming an engaging portion substantially the same as the engaging portion on the reinforcing plate;
A security lens, wherein a thickness of the engaged portion is made to correspond to a thickness of the reinforcing plate and the door.   A security lens that is attached so that the inner cylinder with the external thread provided on the outer periphery is inserted into the mounting hole of the door from the outside of the door and screwed with the outer cylinder with the internal thread provided on the inner periphery so as to sandwich the door In
  The outer cylinder rotation slit provided at the indoor side end of the outer cylinder is formed in a pair substantially along the diameter of the indoor side end formed in a circular shape, and the inner cylinder and the A round jig insertion part is provided according to the shape of the jig used for screwing the outer cylinder, and an inclination is given from the jig insertion part in the direction opposite to the screwing rotation direction of the outer cylinder. Consisting of a tapered portion,
  Provided with a rotation stop mechanism that acts when the male and female screw portions are screwed together, and restricts the rotation of the inner cylinder,
  While fixing the male screw portion of the inner cylinder and the female screw portion of the outer cylinder via a screw lock agent,
The rotation stop mechanism includes an engaged portion in which a part of the flange seat portion of the outdoor flange portion is cut out in a moon shape, and on the other hand, an engagement portion of the mounting hole corresponding to this shape, Forming an engaging portion substantially the same as the engaging portion in the insertion hole of the decorative seat fixed outside the mounting hole,
A security lens characterized in that the thickness of the engaged portion corresponds to the thickness of the decorative seat and the door.

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