JP4538492B2 - Key code conversion cylinder lock - Google Patents

Description

  The present invention relates to a cylinder lock, and more particularly to a key code conversion type cylinder lock formed by converting a key code with a change key so that a key difference can be easily made without changing the cylinder lock itself.

  Conventionally, as this type of cylinder lock, there is one described in Patent Document 1 according to the proposal of the present applicant. This conventional product includes an inner cylinder having a key hole opened on the front surface, a plurality of bar-shaped keys that are inserted into the key hole of the inner cylinder with the same insertion direction regulated, and the key hole described above. A rod-shaped change key for key code conversion inserted into the key hole, and a hole that engages with the tip of the change key inserted into the key hole is located at the axial center position of the inner cylinder And a ring-shaped plate that rotates intermittently about a shaft center by a rotation operation of a change key.

Thus, in this case, the engagement between the tip of the change key and the hole of the plate is indispensable for converting the key code by turning the plate with the change key. The engagement with the hole is not essential for locking and unlocking. In other words, in the case of this conventional product, even if the tip of the bar-shaped key does not engage with the hole in the plate, the key code of the concave portion on the peripheral surface of the bar-shaped key and the tumbler pin matches. It will be able to rotate. When the key codes match and the tip of the bar-shaped key engages with the hole in the plate, the plate is only rotated by the bar-shaped key by a predetermined angle together with the inner cylinder.
Therefore, the conventional product described in Patent Document 1 is at the same level as an ordinary cylinder lock in terms of security performance, and the structure with a built-in plate is not related to the improvement of security performance.
Japanese Patent No. 3975404

The present invention has been proposed in view of such problems of the prior art.
Therefore, the technical problem to be solved by the present invention is that a key code conversion type cylinder lock formed so that a key difference can be easily made by turning a ring-shaped plate with a change key to convert a key code. An object of the present invention is to provide a key code conversion type cylinder lock formed with enhanced measures against unlocking and improved crime prevention performance.

The present invention employs the following technical means in order to solve the above problems.
That is, in the present invention, as shown in FIG. 1 and the like, the inner cylinder 2 having the key hole 1 opened on the front surface and the key hole 1 of the inner cylinder 2 are inserted with the same insertion direction regulated. A plurality of bar-shaped keys 3 and a bar-shaped change key 4 for key code conversion inserted into the key hole 1 are inserted into the key hole 1 at the back of the key hole 1. There is provided a ring-shaped plate 7 that has a hole 7a that engages with the tip of the change key 4 at the axial center position of the inner cylinder 2 and that rotates intermittently at a fixed angle around the axial center when the change key 4 is rotated. A key code conversion type cylinder lock is provided, and a conical member 12 tapered toward the rear is pressed against the rear surface of the plate 7 by a spring 13 on the rear side of the plate 7 so as to be connected to the inner cylinder 2 and the shaft. Provided with the same center, the inner end is in contact with the tapered surface 12a of the conical member 12 The inner pin 14 is accommodated in a hole 2e formed at a rear end portion of the inner cylinder 2 so as to be orthogonal to the axis, and an outer pin 15 whose inner end abuts on the outer end of the inner pin 14 is provided in the inner cylinder 2. The outer cylinder 6 is covered with the above-described hole 2e and accommodated in an extended communication hole 6c. The outer pin 15 and the inner pin are accommodated in the communication hole 6c on the outer end side of the outer pin 15. 14 is housed, and the tip of the bar-shaped key 3 and the hole 7a of the ring-shaped plate 7 are formed to be engageable with each other. And the conical member 12 is pushed backward against the elastic force of the spring 13 so that the inner end of the inner pin 14 extends from the tapered surface 12 a of the conical member 12. When it comes off, the contact position of the inner pin 14 and the outer pin 15 is the share of the inner cylinder 2 and the outer cylinder 6 The inner cylinder 2 coincide with the lines, characterized in that are rotatably formed (claim 1).

  In the case of the present invention, the shaft portions of the rod-shaped key 3 and the change key 4 are specifically formed in a cylindrical shape, a rectangular tube shape such as a square cross section, a columnar shape, a prismatic shape, etc. If it is formed so as to be able to rotate intermittently at the part, its cross-sectional shape is arbitrary. Further, the conical member 12 may be formed in a cylindrical shape by a predetermined length on the side in contact with the rear surface of the plate 7 so as to slide smoothly and stably in the inner cylinder 2. In the case of the present invention, the rear end portion of the inner cylinder 2 is usually formed as a separate member and connected to the main body portion of the inner cylinder 2 for the convenience of assembly, but is limited to such a structure. is not.

Further, according to the present invention, when the conical member 12 moves rearward and comes into contact with the inner surface of the rear end portion of the inner cylinder 2, the inner pin is located at a position where the inner end of the inner pin 14 is disengaged from the tapered surface 12 a of the conical member 12. 14 is preferably positioned and provided (claim 2).
This is because, according to this, when the bar-shaped key 3 is pushed to the limit, the inner cylinder 2 can be rotated, the pushing position becomes clear, and the usability is improved.

In the present invention, a plurality of sets of combinations of the inner pin 14 and the outer pin 15 may be provided around the axis of the conical member 12 with the positions shifted in the extension direction of the axis. (Claim 3).
This is because, according to this, unauthorized unlocking becomes more difficult and crime prevention can be further improved.

In the present invention, when the conical member is pushed with the bar- shaped key and the inner end of the inner pin is removed from the tapered surface of the conical member, the contact position of the inner pin and the outer pin is the share of the inner tube and the outer tube. The inner cylinder is formed so as to be rotatable in line with the line.
Therefore, in the case of the present invention, the key code of the bar-shaped key and the tumbler pin of the inner cylinder does not unlock only by matching, so that a key code conversion type cylinder lock with high crime prevention performance can be provided.

Hereinafter, the best mode for carrying out the present invention will be described.
In the present invention according to this embodiment, as shown in FIG. 1 and the like, the inner cylinder 2 in which the key hole 1 is opened on the front surface and the insertion direction in the key hole 1 of the inner cylinder 2 are regulated to be the same. And three bar-shaped keys 3 inserted into the keyhole 1 and a bar-shaped change key 4 for key code conversion inserted into the keyhole 1. As for the inner cylinder 2, the front part 2a and the rear part 2b are connected by the pin 2c, and the rear surface is closed.

  Reference numeral 5 denotes a shaft rod having a circular cross section disposed along the longitudinal direction of the inner cylinder 2 at the axial center position of the inner cylinder 2 in order to form the cylindrical keyhole 1. As shown in FIG. 1A and the like, the inner cylinder 2 is formed with a housing hole 2d for a tumbler pin (not shown) on its peripheral surface.

  Reference numeral 6 denotes an outer cylinder (cylinder case) that is externally mounted on the inner cylinder 2. A housing hole 6a for a driver pin (not shown) and a coil spring (not shown) is formed in the outer cylinder 6, and the housing hole 6a is closed by a lid 6b. In this embodiment, the shaft portions of the bar-shaped key 3 and the change key 4 are formed in a cylindrical shape. As shown in FIG. 1B, a plurality of recesses 3 a with which the tip of the tumbler pin is engaged are formed on the peripheral surface of the bar-shaped key 3. Further, the bar-shaped key 3 is formed with a pair of upper and lower fin-like engagement pieces 3b that engage with the notches 1a (see FIG. 6B) at the upper and lower positions of the key hole 1, and are inserted by the engagement pieces 3b. The direction is the same for each key 3. The change key 4 is omitted from the recess 3a and the engagement piece 3b formed in the bar-shaped key 3.

  7 (see FIG. 1 and FIG. 2) is a ring-shaped plate that rotates intermittently at a fixed angle around the axis center by the rotation operation of the change key 4. The plate 7 has a hole 7 a that engages with the tip of the change key 4 inserted into the key hole 1 at the axial center position of the inner cylinder 2, and is provided at the back of the key hole 1. As shown in FIG. 2 and the like, the hole 7a of the plate 7 has a convex piece 8 projecting inwardly at regular intervals (120 degrees in this embodiment) about the axial center. It is formed in a shape. The change key 4 and the bar-shaped key 3 have grooves 31 and 41 that engage with the convex piece 8 at their respective tip portions, at a certain angle in the circumferential direction around the axis of each key 3 and 4 ( In this embodiment, 120 degrees) are formed at regular intervals and extending in the longitudinal direction. The groove 31 of the bar-shaped key 3 is formed so that the position of each bar-shaped key 3 is shifted by a certain angle (40 degrees in this embodiment) of the intermittently rotating plate 7.

  In the case of the present invention, the mechanism for intermittently rotating the plate 7 is, as shown in FIGS. 2 and 3, a fixed angle with respect to the center of the hole 7a on the back surface of the plate 7 (in this embodiment, 40 degrees). ) Are engaged with the recesses 9 formed on the circular locus at regular intervals, and at the positions of the recesses 9 at regular intervals (120 degrees in this embodiment) at regular intervals. A steel ball 10 and an axis around the axis of the inner cylinder 2 for pressing the plate 7 forward through the steel ball 10 and crimping it to the rear end surface of the front part 2a (see FIG. 1A, etc.) of the inner cylinder 2 The coil spring 11 is provided along the direction. Further, the three bar-shaped keys 3 are formed such that the grooves 31 are formed 120 degrees apart from each other around the axis, and as described above, the position where the grooves 31 are formed is 40 degrees for each of the bar-shaped keys 3. It is shifted and formed. Thereby, in the present invention, a key code conversion system in which the rotation angle is 120 degrees and the key is different is realized.

  Reference numeral 12 denotes a conical member that tapers toward the rear. The conical member 12 is provided on the rear side of the plate 7 so as to be pressed against the rear surface of the plate 7 by a spring 13 so as to have the same axis as the inner cylinder 2.

  Reference numeral 14 denotes an inner pin whose inner end abuts against the tapered surface 12 a of the conical member 12. The inner pin 14 is accommodated in a hole 2e formed at a rear end portion of the inner cylinder 2 so as to be orthogonal to the axis. The inner pin 14 is positioned at a position where the inner end is disengaged from the tapered surface 12 a of the conical member 12 when the conical member 12 moves rearward and contacts the inner surface of the rear end portion of the inner cylinder 2. Is provided.

  Reference numeral 15 denotes an outer pin whose inner end abuts on the outer end of the inner pin 14. The outer pin 15 is accommodated in a communication hole 6c formed in an extended shape in communication with the hole 2e in the outer cylinder 6 covering the inner cylinder 2. Reference numeral 16 denotes a coil spring that repels the outer pin 15 and the inner pin 14 inward. The coil spring 16 is housed in the communication hole 6 c on the outer end side of the outer pin 15.

  In the present invention, the rod-shaped key 3 is inserted through the hole 7 a of the plate 7, and the conical member 12 is pushed backward against the elastic force of the spring 13, so that the inner pin 14. When the inner end of the inner cylinder 2 deviates from the tapered surface 12 a of the conical member 12, the contact position of the inner pin 14 and the outer pin 15 coincides with the shear line of the inner cylinder 2 and the outer cylinder 6, and the inner cylinder 2 is formed to be rotatable. It is what.

Next, the operation of the present invention will be described.
First, the user inserts the bar-shaped key 3 into the keyhole 1. The bar-shaped key 3 has the same insertion direction with respect to the key hole 1 as the bar-shaped key 3 by engaging the engagement pieces 3b with the upper and lower cutouts 1a of the key hole 1. Be regulated. When the groove 31 of the bar-shaped key 3 fits into the hole 7a of the plate 7, the bar-shaped key 3 can be inserted deeply to a predetermined position. In this state, the user pushes the bar-shaped key 3 against the spring force of the spring 13.

  Thus, when the conical member 12 is pushed in, as shown in FIG. 5, in this embodiment, the tip of the conical member 12 hits the inner surface of the rear end portion of the inner cylinder 2 and cannot be pushed any further. At this time, the inner end of the inner pin 14 deviates from the tapered surface 12 a of the conical member 12 and is disposed at the circumferential surface position of the maximum diameter of the conical member 12. The contact position between the inner pin 14 and the outer pin 15 coincides with the sha line of the inner cylinder 2 and the outer cylinder 6. When the conical member 12 is inserted to the deepest position, the tumbler pin is engaged with the concave portion 3a on the peripheral surface, and the key codes are matched. As a result, the bar-shaped key 3 can be rotated and locked and unlocked.

In the present invention, the key code conversion procedure and the conversion operation are as follows.
First, the user inserts the change key 4 into the keyhole 1 and applies a pressing force and a rotational force exceeding the elastic force of the coil spring 11 to the change key 4. Then, the dent 9 at the position of the steel ball 10 comes off from the steel ball 10, for example, the dent 9 at the reference position on the vertical line rotates 40 degrees, and the dent at a position of minus 40 degrees (320 degrees clockwise) from the reference position. 9 rotates to the reference position and engages with the steel ball 10. Accordingly, the plate 7 is shifted by 40 degrees from the reference position.

  In this case, unlike the rod-shaped key 3, the change key 4 has a shape in which the recess 3a and the engagement piece 3b are omitted. Therefore, the change key 4 is not related to the inner cylinder 2 (without rotating the inner cylinder 2), and can be rotated 360 degrees forward and backward. The plate 7 is rotated by the change key 4 in this way, and rotates intermittently every 40 degrees. Therefore, on the plate 7, the position of the convex piece portion 8 changes by 40 degrees, and the key code is converted by 40 degrees. Then, by rotating the plate 7 by 40 degrees and converting the key code, the present invention according to this embodiment has three bar-shaped keys 3 from the first key to the third key. It can be used as a key difference.

In the above place, as shown in FIG. 7, for example, the present invention is configured such that a pair of combinations of the inner pin 14 and the outer pin 15 is arranged around the axis of the conical member 12 in the extending direction of the axis. A plurality of positions may be provided by shifting the positions. This embodiment is an example in which one set of combinations is provided by being shifted 90 degrees around the axis of the conical member 12.
In the case of the present invention, when the bar-shaped key 3 is inserted to a predetermined depth, the contact position of the inner pin 14 and the outer pin 15 is the share of the inner cylinder 2 and the outer cylinder 6 as shown in FIG. In line with the line, the inner cylinder 2 can be rotated, in other words, can be locked and unlocked.

1 shows a preferred embodiment of the cylinder lock of the present invention, wherein A is a cross-sectional view taken along the line IA-IA in FIG. 6A, B is a side view of a main part of a bar-shaped key, and C is a side view of a main part of a change key. . It is a rear view of a plate. It is a rear view of the plate which shows the arrangement | positioning position of a steel ball, and the state in which the change key was inserted. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is sectional drawing for demonstrating the effect | action of the cylinder lock of this invention. An inner cylinder is shown, A is a side view, B is a front view, C is a rear view. It is principal part sectional drawing which shows other embodiment of a cylinder lock same as the above. It is principal part sectional drawing for demonstrating the effect | action of embodiment of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Key hole 2 Inner cylinder 2e Hole 3 Rod-shaped key 4 Change key 5 Shaft bar 6 Outer cylinder 6c Communication hole 7 Plate 7a Hole 12 Conical member 12a Tapered surface 13 Spring 14 Inner pin 15 Outer pin 16 Coil spring

Claims (3)

An inner cylinder having a key hole on the front surface, a plurality of bar-shaped keys that are inserted into the key hole of the inner cylinder with the same insertion direction restricted, and a key that is inserted into the key hole. A rod-shaped change key for code conversion is provided, and there is a hole in the inner center of the inner cylinder that has a hole that engages the tip of the change key inserted into the key hole at the back of the key hole. A key code conversion type cylinder lock provided with a ring-shaped plate that rotates intermittently at a certain angle around the axis by rotating the key, and is tapered toward the rear on the rear side of the plate. A conical member is pressed against the rear surface of the plate by a spring and is provided with the same axis as the inner cylinder, and an inner pin whose inner end abuts against the tapered surface of the conical member has a shaft at the rear end of the inner cylinder. It is housed in a hole that is formed perpendicular to the center, and the outer end of this inner pin An outer pin with which the end abuts is accommodated in a communication hole formed in an extended shape so as to communicate with the hole in an outer cylinder covering the inner cylinder, and the outer pin is inserted into the communication hole on the outer end side of the outer pin. A coil spring that repels the inner pin inward is housed, and the tip of the bar-shaped key and the hole of the ring-shaped plate are formed to be engageable with each other, and the bar is formed through the hole of the ring-shaped plate. When the shape key is inserted, the conical member is pushed backward against the spring force of the spring, and the inner end of the inner pin is released from the tapered surface of the conical member, the contact position of the inner pin and the outer pin is changed. A key code conversion type cylinder lock, wherein the inner cylinder is formed so as to be rotatable in accordance with a share line of the inner cylinder and the outer cylinder.   2. The key code conversion type cylinder lock according to claim 1, wherein when the conical member moves rearward and comes into contact with the inner surface of the rear end portion of the inner cylinder, the inner end of the inner pin comes from the tapered surface of the conical member. A key code conversion type cylinder lock characterized in that an inner pin is positioned and provided at a position to be removed.   3. The key code conversion type cylinder lock according to claim 1 or 2, wherein a set of a combination of an inner pin and an outer pin is shifted around the axis of the conical member in the extension direction of the axis. A key code conversion type cylinder lock characterized by being provided.

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