JP4596525B2 - Crime prevention thumb turn - Google Patents

Description

  The present invention relates to a crime prevention type thumb turn, and more particularly to a crime prevention type thumb turn that can prevent unauthorized unlocking and thus has improved safety.

  As is well known, the thumb turn is a device that is mounted on the inner surface of the door coaxially with the cylinder lock, and turns and locks the cylinder lock without using a key.

  By the way, in recent years, a door with a clear opening provided in a door and a glass plate fitted therein has been used according to a design requirement.

  This door is so-called good, but if you break the glass plate from the outside, insert your hand through the opening to the inside of the room and turn the thumb turn, it will easily allow unauthorized unlocking and the security will not be reduced. can not deny.

Therefore, the present applicant has proposed a crime prevention type thumb turn that makes such unauthorized unlocking impossible with Patent Document 1 described later.
Japanese Patent No. 3602957 Patent Gazette

  This crime prevention type thumb turn is provided with a thumb turn cylinder lock on the indoor side, and the inner cylinder of this cylinder lock is connected to the dharma operating shaft in the lock box. In some cases, this key is removed.

  This crime-preventing thumb turn is of course put to practical use with the expected function, but there is still room for improvement, such as the structure of the thumb turn becoming complicated and the cost rising.

  As a simple type of the crime prevention type thumb turn, there is one that removes the thumb turn pick when going out.

  However, this type of crime prevention thumb turn has the disadvantage that it can be unlocked illegally by operating the connecting portion exposed to the indoor space after removing the knob.

  Therefore, the present invention provides a security type thumb turn that can prevent unauthorized unlocking while being a simple form for removing the knob when going out, thereby simplifying the structure of the security type thumb turn and improving its safety. The purpose is that.

In order to achieve the above object, the invention described in claim 1 is a thumb turn seat mounted on the inner surface of the door, and is rotatably supported by the thumb turn seat, and the outer end portion is connected to a dharma in the lock box. A dharma operating shaft, a connecting shaft integrally formed with the knob and coaxial with the dharma operating shaft, and an attaching / detaching portion formed on the outer peripheral surface of the front end portion of the connecting shaft along the generatrix. In the thumb turn seat, a plate-like body guided so as to be able to swing in a plane parallel to the door surface, and a locking hole that loosely fits the tip end of the connecting shaft is opened, and a stopper biased to one side is provided. Open a bottomed connecting hole with the same cross-sectional shape as the connecting shaft on the inner end surface on the indoor side of the Dharma operating shaft, and fit the tip of the connecting shaft to this connecting hole to operate the attaching / detaching portion. Connect to the shaft and engage the opening edge of the stopper's locking hole with the protrusion on the connecting shaft In the case where the attachment / detachment portion is prevented from falling off, a coaxial filling rod is formed in the connection hole, and a receiving hole is opened in the tip end portion of the connection shaft correspondingly to connect the tip end portion of the connection shaft. When fitting into the hole, the filling rod is accommodated in the receiving hole, and on the other hand, a restriction hole through which only the connecting shaft at the locking angle position or the unlocking angle position can be inserted between the stopper and the inner end surface of the dharma operation shaft. The opened baffle plate is inserted, and thus the unauthorized unlocking tool inserted into the restriction hole after removing the connecting shaft integral with the knob when going out is restrained .

  The security type thumb turn according to the first aspect of the present invention configured as described above has a filling rod in the center of the connection hole of the dharma operation shaft that opens after the detachable portion is removed. When an unauthorized unlocking tool such as the tip of a flathead screwdriver is inserted into the connection hole, the unauthorized unlocking tool is obstructed by the filling rod and pushed to the corner of the connection hole.

  Then, the side edge of the tool always engages with the protrusion receiving portion of the connecting shaft, and when the unauthorized unlocking tool is turned in this state, the rotation is blocked by the engagement with the restriction hole of the fixed baffle plate. Therefore, an excellent effect of being able to completely prevent unauthorized unlocking is achieved.

  By forming a coaxial filling rod in the connection hole, the unauthorized unlocking tool is prevented from being inserted into the connection hole that is exposed after the detachable part is removed, and at least inconvenient. A baffle plate with a restriction hole through which only the connecting shaft at the locking angle position and the unlocking angle position can be inserted is inserted between the end face and the end face. The rotation of the correct unlocking tool is prevented, and the function of preventing unauthorized unlocking of the crime prevention thumb turn can be provided with a simple configuration.

Embodiments of the present invention will be described below with reference to the drawings.
1 to 4, reference numeral 1 denotes a thumb turn seat. The thumb turn seat 1 is covered by a mounting screw 3, 3 (see FIG. 1) with a cup-shaped cover 2 (see FIGS. 1 and 2) covered. Mounted on the inner surface of the door 4.

  The mounting screw 3 is inserted into a screw hole 5 (see FIG. 3), a door 4 and a lock box 6 that are opened in the thumb turn seat 1, and the tip of the mounting screw 3 is usually screwed into a cylinder cylinder (not shown). Secure the door so that it is called on the outside.

  A stepped dharma operating shaft 8 (see FIGS. 1 and 2) is rotatably supported in a support hole 7 (see FIGS. 3 and 4) opened in the center of the thumb turn seat, and can be used to stop an E-ring or the like. The ring 9 is provided with a retaining ring.

  The tip of the dharma operation shaft 8 has, for example, a cross-shaped tip (the right end in FIGS. 1 and 2) is inserted through the opening of the side plate of the lock box 6 and is engaged with a dead bolt operation member generally called a dharma. The door is locked and unlocked by the rotation of the dharma operation shaft 8 as in the case of a normal thumb turn.

  On the other hand, the attaching / detaching portion 11 selectively connected to the dharma operating shaft 8 is configured as shown in FIG.

  That is, as shown in FIG. 5, the attaching / detaching portion 11 is integrally coupled to a knob 12 made of, for example, a synthetic resin by embedding a base end in the knob 12 and is coaxial with the Dharma operation shaft when mounted. And a connecting shaft 13.

  On the outer peripheral surface of the distal end portion (right end portion in FIG. 5) of the connecting shaft 13, a total of four ridges 14 and 14 are formed along the generatrix.

  In the illustrated embodiment, the protrusions 14 and 14 are formed at an angular interval of 90 degrees from each other, and every other radial height as shown in FIGS. There is a difference.

  Correspondingly, as shown in FIG. 7, the inner end surface of the dharma operation shaft 8 on the indoor side is formed with a connection hole 15 having a substantially cruciform shape and a bottom having the same cross-sectional shape as the front end portion of the connection shaft 13. Has been.

  That is, the connecting shaft 13 and the Dharma operating shaft 8 can be connected in a state where they are prevented from rotating by inserting and fitting the distal end portion of the connecting shaft into the connecting hole 15 of the Dharma operating shaft.

  In addition, the reason for providing a difference in height between the protrusions 14 and 14 of the connecting shaft as described above is that the relative relationship angle between the knob 12 and the dharma operation shaft 8 is made constant, and the normal thumb turn is so. As described above, when the knob is horizontal, it is determined to be locked, and the locked / unlocked state can be determined simply by looking at the knob from the room.

  On the other hand, as shown in FIGS. 1 and 2, a stopper 16 is disposed at a position that interferes with the central portion of the connecting shaft 13.

  As shown in FIGS. 2 and 8, the stopper 16 is a thick plate material having a substantially inverted convex shape as a whole, and a pair of left and right spring pieces 17 and 17 are integrally formed at the upper end in FIG. In addition, a locking hole 18 is formed in the center of the upper end portion, which is substantially cross-shaped and into which the tip end portion of the connecting shaft can be loosely fitted.

  The stopper 16 is inserted into a stopper recess 19 (see FIGS. 3 and 4) formed in the thumb turn seat 1 in a vertical direction in FIG. 3, and in FIG. It is held and guided so that it can swing within a parallel plane.

  Furthermore, it is urged downward by the elasticity of the spring pieces 17, 17 that are in elastic contact with the ceiling surface of the stopper recess 19.

Note that the standby position of the stopper 16 in a state where no external force is applied is uniquely determined by joining the stepped portion and the opening edge of the stopper recess 19 .

Then, at the standby position of the stopper 16, as shown in FIG. 9, the upper edge 21 (see FIG. 8) of the horizontally long opening of the locking hole 18 is a horizontal plane passing through the center of the connecting hole 15 of the Dharma operation shaft. It is set to match.

  Therefore, when the stopper 16 is in the standby position, either when the connecting shaft 13 is in the locking angle position or in the unlocking angle position, the high or low protrusions 14, 14 are connected to the upper edge 21. In this way, the detachable portion 11 is prevented from coming off.

  However, the lower end portion of the stopper 16 penetrates the thumb turn seat 1 and the cup-shaped decorative member 22 and protrudes downward. When the detachable portion 11 is removed, the lower end portion of the stopper 16 resists the urging force and moves upward. Since the engagement between the stopper and the ridge 16 is released, the attached detachable portion 11 can be removed.

  In addition, the inclination part which is not numbered is formed in the front-end | tip part of each protrusion 14, The connection axis | shaft 13 is made into the dharma operation axis | shaft by the wedge action which arises between this inclination part and the upper end edge 21 of the said locking hole. The stopper is automatically raised a little when it is fitted into 8, and then comes down and is automatically retained.

  In the crime prevention type thumb turn configured as described above, the cross-shaped connecting hole 15 (see FIG. 7) of the dharma operating shaft is exposed to the indoor space with the detachable portion 11 removed, and a driver or the like is exposed to the connecting hole 15. If it is inserted, unauthorized unlocking is easy.

  Therefore, the characteristic configuration of the present invention is that, as shown in FIGS. 1, 2 and 7, a coaxial filling rod 23 is formed in the connecting hole 15, and a driver or the like can be easily inserted into the connecting hole 15. There is no way.

  Correspondingly, as shown in FIG. 10, a receiving hole 24 is formed at the tip of the connecting shaft 13, and when the tip of the connecting shaft is fitted into the connecting hole 15, the filling rod 23 is received by the hole. (See FIGS. 1 and 2).

  In addition, as shown in FIGS. 1 and 2, the rectangular recess 19 (see FIGS. 3 and 4) formed in the center of the thumb turn seat 2, in other words, the stopper 16 and the inner end face of the dharma operating shaft 8. Between the two, the baffle plate 25 is fitted.

  As shown in FIG. 11, the baffle plate 25 is a rectangular plate material having a cross-shaped restriction hole 26 opened at the center thereof.

  The shape and size of the restriction hole 26 are set so that only the connecting shaft 13 at the locking angle position and the unlocking angle position can be inserted.

  In other words, the width of the horizontal bar portion of the cross-shaped connecting hole 15 shown in FIG. 7 is slightly increased to be the same as the length of the vertical bar portion, and the restriction hole 26 is overlapped with the opening of the connecting hole 15.

  The crime prevention type thumb turn according to one embodiment of the present invention configured as described above is shown in FIG. 7 when an unauthorized unlocking tool 27 such as a screwdriver is inserted into the connecting hole 15 with the detachable portion 11 removed. As described above, the unauthorized unlocking tool 27 is pushed to the corner of the connecting hole 15 for the filling rod 23, and its end is engaged with the groove for receiving the protrusion.

  At the same time, as shown in FIG. 11, the unauthorized unlocking tool 27 is engaged with one of the four notches in the baffle plate restricting hole 26.

  Even if it is attempted to rotate the unauthorized unlocking tool 27 in this state, it is clear that the unauthorized unlocking tool does not move because the baffle plate 25 is fixed. Prevent completely.

1 is a partial cross-sectional plan view of a security type thumb turn according to one embodiment of the present invention. The partial cross section side view of the crime prevention type thumb turn by one Example of this invention. Front view of the Samturn seat. A sectional view of the thumb turn seat. The side view of an attaching / detaching part. The top view of an attachment / detachment part. The front view which shows the inner end of a dharma operation shaft. The front view of a stopper. The front view of the security thumb turn which removes and shows an attachment / detachment part. The longitudinal cross-sectional view of a connecting shaft. The front view of a baffle board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thumb turn seat 2 Cover 3 Mounting screw 4 Door 6 Shaped box 7 Support hole 8 Dalma operation shaft 11 Detachment part 12 Knob 13 Connection shaft 14 Projection 15 Connection hole 16 Stopper 17 Spring piece 18 Locking hole 19 Stopper recess 23 Filling rod 24 Receiving hole 25 baffle plate 26 restriction hole

Claims (1)

A thumb turn seat mounted on the inner surface of the door, a dharma operation shaft that is rotatably supported by the thumb turn seat and has an outer end connected to a dharma in the lock box, and a coaxial connection with the dharma operation shaft that is integrated with the knob. An attaching / detaching portion having at least one protrusion formed along the generatrix on the outer peripheral surface of the tip end portion of the connecting shaft, and a thumb turn seat that can swing within a plane parallel to the door surface. The formed plate-like body has a locking hole that loosely fits with the distal end portion of the connecting shaft, and has a stopper biased to one side, and is the same as the connecting shaft on the inner end surface on the indoor side of the dharma operating shaft. Open a bottomed connecting hole with a cross-sectional shape, connect the tip of the connecting shaft to this connecting hole, connect the detachable part to the Dharma operating shaft, and connect the opening edge of the stopper's locking hole A scent that is secured to the removable part by engaging with the shaft protrusion. A coaxial filling rod is formed in the connecting hole, a receiving hole is opened at the tip of the connecting shaft correspondingly, and the filling rod is stored in the receiving hole when the connecting shaft is fitted into the connecting hole. On the other hand, between the stopper and the inner end surface of the Dharma operation shaft, a baffle plate having a restriction hole through which only the connecting shaft at the locking angle position or the unlocking angle position can be inserted is inserted , and A crime prevention type thumb turn characterized in that an unauthorized unlocking tool inserted into the restriction hole after removing a connecting shaft integral with a knob when going out is restrained .

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