JP5640297B2 - Dial lock opening prevention mechanism - Google Patents

Description

  The present invention relates to a door opening prevention mechanism (hereinafter simply referred to as a door opening prevention mechanism) of a dial lock that is mounted on a lid of a mail box or the like, and particularly in a state where the dial lock is unlocked in accordance with the code number of the dial lock. The present invention relates to a door opening prevention mechanism capable of preventing mail from being stored and the lid from opening naturally when the lid of a mail box is closed.

The general structure of the dial lock is such that, for example, as described in the detailed description of the invention of the following Patent Document 1 and the drawings , it can be rotated independently of each other and is coaxially supported inside and outside. The inner and outer cutouts are respectively formed on the outer peripheral portion of the rotating body, and first and second engaging pieces capable of interfering with each other are protruded from the mutually opposing portions of the inner and outer rotating bodies, respectively. Further, a dial mechanism in which a knob is coupled to either the inner rotating body or the outer rotating body, a holder integrally coupled to the outer case inside the dial mechanism, and a head supported by the holder. A latch that is biased by a latch spring in a direction protruding outward, and a guide slit perpendicular to the rotation axis of the inner and outer rotating bodies is formed in one of the latch and the holder, and the other is Information slip A guide pin that can be rotated inside is provided, and the guide slit and the guide pin are slidably engaged. By operating the knob, the inner and outer notches are arranged at predetermined angular positions, in other words, in the latch. Align and unlock by pulling the knob in that state.

In the dial lock described in the following Patent Document 2, a sickle-shaped buffer piece is integrally coupled to the head of the latch, and the latch is brought into sliding contact with the latch piece 14 of the mail box so that the latch is While being engaged with the inner and outer cutouts, it is rotated around the guide pin 8 to open the cover plate 13 of the mailbox.
Japanese Patent Laid-Open No. 09-078910 JP 2002-303063 A

  Since the dial lock is configured as described above, for example, it is necessary to operate and operate the knob every time the lid plate of the mail box is opened and closed, which is troublesome.

  Therefore, usually, with the outer and inner notches of the dial lock fixed in the unlocked position, that is, without using the dial lock locking function, the cover plate is opened and closed, and the cover plate is mailed using the latch function of the latch. It is hung on the box.

  Therefore, when mail items are stored in the mail box, the mail items push the cover plate outward, that is, the cover plate opens, so that the latch is engaged in the inner and outer notches due to the dial lock function. However, the cover plate opens while rotating, and the inconvenience that the mail piece inside falls to the floor arises.

  Therefore, the present invention provides a door opening prevention mechanism that prevents the lid from opening even when the lid is hooked on the mail box in an unlocked state where the inner and outer notches of the dial lock are aligned at the unlocked position. The purpose is that.

In order to achieve the above-mentioned object, the invention according to claim 1 is provided in the inner and outer rotating bodies that are housed in the inner cylindrical portion of the outer case and can be rotated independently of each other and are coaxially supported. Inner and outer cutouts are formed on the outer periphery, and first and second engaging pieces capable of interfering with each other are projected from the mutually opposing portions of the inner and outer rotating bodies. A dial mechanism in which a knob is coupled to either the rotator or the outer rotator, a holder integrally coupled to the outer case inside the dial mechanism, and a head supported by the holder so that the head protrudes outside the holder. A latch that is urged by a latch spring in a direction to be formed, and a guide slit perpendicular to the rotation axis of the inner and outer rotating bodies is formed in one of the latch and the holder, and the other in the guide slit. Rotating guy Provided pins in these guide slits and the guide pins dial lock was slidably engaged with the, at the same angular position as the guide slit in the inner peripheral surface of the outer casing, a trigger rod receiving groove along its generatrix A long and narrow trigger rod is accommodated in the trigger rod storage groove so as to be movable in the length direction, while an operation ring is rotatably fitted on the outer end portion of the outer case. In addition to providing a flat portion perpendicular to the center axis of the dial lock and a cam that forms an inclined surface that is oblique to the flat portion at a position that is substantially aligned with the center axis of the dial lock, The operation ring is urged in one direction, while the length of the trigger rod is set so that when the outer end comes into contact with the cam in a normal state where no external force acts on the operation ring, the inner end is the opening of the inner and outer rotating bodies. Edge Characterized by being configured to substantially align.

  In the invention according to claim 1 configured as described above, in a normal state where no external force acts on the operation ring, the dial mechanism is in an unlocked state, and the mail is stored in the mailbox to open the lid. When the pressure is applied to the latch, the latch tries to engage with the notch of the inner and outer rotating bodies, but the movement of the latch is blocked by the inner end of the trigger rod, so that the latch rotates further. Can't, and eventually the lid won't open.

  On the other hand, when the operation ring is turned in the other direction against the biasing force, a gap is created between the outer edge of the trigger rod and the cam, so the trigger rod can be moved outward and the inside of the mailbox Depending on the weight of the postal item or by opening the lid with the operation ring held between fingers, the latch can be rotated while being engaged with the notches of the inner and outer rotating bodies, so that the lid can be opened. it can.

  On the other hand, when the lid is pushed in the closing direction to close the opened lid, the latch does not rotate and rotates inward and outward due to the wedge action generated between the head of the latch and the locking projection of the mailbox. The lid can be closed because it can be immersed in the holder along the opening edge of the body.

  In addition to the dial lock of the normal configuration, a trigger rod is provided along the generatrix at a predetermined angular position on the inner peripheral surface of the outer case, while an operating ring is provided outside the outer end of the case. In a position that is substantially aligned with the outer edge of the trigger collar on the inner surface of the operation ring, and a plane portion that is perpendicular to the center axis of the dial lock, and that has a different angular position from the plane portion. The cam with an inclined surface that is obliquely crossed is fixed, and the operating ring is urged in one direction. When touching, the inner end is set so that it is almost aligned with the opening edge of the inner and outer rotators, so the trigger ring is restrained or released by rotating the operating ring. Even a post box That the lid will open it can be prevented by the pressure due to the postal matter is accumulated in the.

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 1 denotes an inner rotating body, and reference numeral 2 denotes an outer rotating body. The inner and outer rotating bodies 1 and 2 are housed in the inner cylindrical portion of the outer case 3 and rotate independently of each other. It is supported and guided coaxially so that it can move.

  Inner and outer notches 4 and 5 are formed at predetermined angular positions on the outer peripheral portions of the inner and outer rotating bodies 1 and 2, respectively.

  Further, a first piece 6 and a second engaging piece (not shown) that can interfere with each other protrude from the mutually opposing portions of the inner and outer rotating bodies 1 and 2, respectively. A dial mechanism indicated by reference numeral 8 as a whole is configured by coupling a knob 7 to either one of the rotating body 1 and the outer rotating body 2 (the inner rotating body shown in FIG. 1).

  Then, on the inner side (left side in FIG. 1) of the dial mechanism 8, a holder 9 integrally coupled to the outer case 3 is supported by the holder 9 and latched in a direction in which the head protrudes outside the holder. A latch 12 biased by a spring 11 is provided.

  A guide slit 13 perpendicular to the rotation axis of the rotating bodies 1 and 2 is formed in the holder 9, while a guide pin 14 that can rotate in the guide slit 13 is provided on the latch 12. The guide pin 14 is slidably engaged with the slit 13.

  In addition, since the general structure of the above-mentioned dial lock is described in detail in Patent Documents 1 and 2 and is well known, further detailed description is omitted.

  On the other hand, as shown in FIG. 3, at the same angular position as the slit 13 on the inner peripheral surface of the outer case 3 (in FIG. 3, the angular position at 12 o'clock in terms of the clock face), the cross section along the generatrix. A substantially fan-shaped trigger rod storage groove 15 is formed, and an elongated trigger rod 16 is stored in the trigger rod storage groove 15 so as to be movable in its length direction (see FIGS. 1 and 2).

  As shown in FIGS. 4 and 5, the trigger rod 16 is a long and slender frame whose cross section is cut out along the generatrix and has a substantially fan-shaped cross section, and its outer end (the left end in FIG. 4) is a rod. An inclined edge 17 that is formed in a shape and engages with a cam described later is formed.

  By setting the cross section of the trigger rod 16 and the cross section of the trigger rod storage groove 15 to be substantially fan-shaped, the trigger rod 16 is automatically prevented from coming off when the former is fitted into the latter. become.

  Of course, when the trigger rod 16 is fitted into the trigger rod storage groove 16, the inner end of the trigger rod 16 is fitted from the outer end surface side of the outer case.

  On the other hand, as shown in FIGS. 1 and 2, an operation ring 18 is rotatably fitted to the outside of the outer end portion of the outer case 3.

  The cam 19 is fixed, for example, by screwing at a position (in FIG. 2, the angle position at 12 o'clock in terms of the clock face in FIG. 2) that is substantially aligned with the outer end of the trigger rod on the inner surface of the operation ring 18.

  The cam 19 is actually a component obtained by bending a plate material in a complicated manner. However, even if it is described in detail, there is no meaning, so the configuration of the cam 19 is shown schematically in FIG.

  That is, as shown in FIG. 9, the cam 19 is formed with a plane portion 21 perpendicular to the central axis of the dial lock and an inclined surface 22 that is different in angular position from the plane portion 21 and obliquely intersects with the plane portion. is there.

  As shown in FIG. 6, the inclined surface 22 is inclined outward with respect to the plane portion 21.

2 and 6, due to the elasticity of the ring spring 23 as a compression coil spring elastically mounted between the cam 19 and a step portion (not shown) formed on the outer peripheral portion of the outer case 3, In FIG. 2, that is, when the dial lock is viewed from the knob 7 side, the operation ring 18 is biased counterclockwise.
In FIG. 6, reference numeral 24 denotes a mounting nut for mounting the dial lock on the mail box.

  The door opening prevention mechanism according to one embodiment of the present invention configured as described above is such that when the dial mechanism is unlocked as shown in FIG. 1 and no external force acts on the operation ring 18, In the normal state, the cam 19 has its flat portion 21 opposed to the outer end of the trigger rod 16.

  As described above, the inner end of the trigger rod 16 faces the holder in a state where it is substantially aligned with the opening edges of the inner and outer rotary bodies 1 and 2, so that the postal matter with the postal box cover accumulated When the pressure is applied in the opening direction due to the weight of the latch, the latch that tries to rotate around the guide pin by the pressure tries to push the trigger rod 16 outward, but the push is camped via the trigger rod. Since it is carried by the 19 flat surface portions 21, the lid does not open.

  On the other hand, when the operation ring is turned clockwise and the inclined surface portion 22 is moved upward in FIG. 6, a gap is formed between the outer end of the trigger rod 16 and the cam 19, so that the trigger rod 16 is pushed by the latch. As described above, the lid can be moved outward and as a result the lid can be opened.

  When the hand is released from the operation ring 18, the inclined surface 22 descends in FIG. 6 due to the elasticity of the ring spring 3, and at this time, it occurs between the inclined surface 22 and the inclined edge 17 (see FIG. 4) of the trigger rod. Due to the wedge action, the trigger rod 16 moves inward and returns to the state shown in FIG.

The longitudinal cross-sectional view of the dial field provided with the door opening prevention mechanism by one Example of this invention. FIG. The front view of an outer case. The top view of a trigger fence. Front view of the trigger fence. The top view of the door opening prevention mechanism by one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner rotator 2 Outer rotator 3 Outer case 4 Inner notch 5 Outer notch 6 First engagement piece 7 Knob 8 Dial mechanism 9 Holder 11 Latch spring 12 Latch 13 Guide slit 14 Guide pin 15 Trigger rod storage groove 16 Trigger rod 17 Inclined edge 18 Operation ring 19 Cam 21 Flat portion 22 Inclined surface 23 Ring spring 24 Mounting nut

Claims (1)

Inner and outer cutouts are formed in the outer peripheral parts of the inner and outer rotating bodies, which are housed in the inner cylindrical part of the outer case and can be rotated independently of each other and are coaxially supported. A dial mechanism in which first and second engaging pieces capable of interfering with each other protrude from the mutually opposing portions of the outer rotating body, and a knob is coupled to either the inner rotating body or the outer rotating body. A holder integrally coupled to the outer case inside the dial mechanism, and a latch supported by the holder and biased by a latch spring in a direction in which the head projects out of the holder, forming a vertical guide slit in the latch and the rotational axis of either one the inner and outer rotary member of the holder, provided with a guide pin that can rotate in the guide slit to the other, these guide slits and the guide pin In rotatably engaged dialed tablets were in the same angular position as the guide slit in the inner peripheral surface of the outer case, to form a trigger rod receiving groove along its generatrix, the elongated trigger rod to the trigger rod receiving groove The operating ring is accommodated so as to be movable in the length direction, and on the other hand, an operating ring is rotatably fitted outside the outer end portion of the outer case. , A flat portion perpendicular to the central axis of the dial lock, and a cam that forms an inclined surface that is different in angular position from this flat portion and obliquely intersects with the flat portion, and urges the operating ring in one direction, The length of the trigger rod is set so that the inner end is substantially aligned with the opening edge of the inner and outer rotating bodies when the outer end contacts the cam in a normal state where no external force acts on the operation ring. Dial lock The door opening prevention mechanism.

Images