JP2006077442A - Pin cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pin cylinder lock with excellent burglarproof properties, which is hardly picked. <P>SOLUTION: This pin cylinder lock comprises a means for preventing an inner cylinder 5 from being turned in an unlocking direction by preventing an upper pin 4 or lower pins 7 (7a-7f) provided in pin holes 2 and 6 in at least one column among the pin holes 2 and 6 of an outer cylinder and the inner cylinder in two or more columns from receiving an impact force by an unauthorized implement or preventing at least the lower pins 7 (7a-7f) from being moved even if the impact force is received when the instrument M for applying the impact force on the lower pins 7 (7a-7f) of the inner cylinder 5 for unlocking is inserted into the keyhole 8 of the inner cylinder 5 in the locked state of the pin cylinder lock. Specifically, for example, at least one of the pin holes 6... provided in the inner cylinder 5 so as to house the lower pin has a depth different from the depths of the other pin holes 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pin cylinder lock that can prevent picking.

  Picking is a share that is the boundary between the inner cylinder and the outer cylinder by pushing up the lower pin with a special unauthorized unlocking tool while applying rotational force to the inner cylinder. By matching the line, it means that the inner cylinder is rotated and unlocked without using a key.

  Conventionally, as shown in Patent Documents 1 to 3, this type of pin cylinder lock is known in which a pin that prevents rotation of the inner cylinder in a locked state is provided between the inner cylinder and the outer cylinder. It has been. A typical pin cylinder lock is shown in FIGS. 29 is a longitudinal sectional view in a locked state, FIG. 30 is a sectional view taken along a line GG in FIG. 29, FIG. 31 is a longitudinal sectional view in which the key is inserted into the keyhole in the locked state in FIG. The longitudinal cross-sectional view which shows the picking initial state by which the impact force was given to the lower pin which is a kind of unauthorized unlocking tool from the keyhole in the locked state of FIG. FIG. 33 is a cross-sectional view taken along line G1-G1 of FIG. 32, and FIG. 34 is an example of a tool for illegal unlocking from the initial picking state of FIG. FIG. 35 is a sectional view taken along line G2-G2 of FIG. 34. FIG. 35 is a sectional view taken along line G2-G2 of FIG.

  The conventional pin cylinder lock will be described below with reference to FIGS. An inner cylinder 05 having a pin hole 06 and a key hole 08 is rotatably fitted to an outer cylinder 01 having a pin hole 02, and is biased toward the inner cylinder 05 by a spring 03 in the pin hole 02 of the outer cylinder 01. The substantially cylindrical upper pin 04 is slidably accommodated, and the substantially cylindrical lower pin 07 is slidably accommodated in the pin hole 06 of the inner cylinder 05. This is a pin cylinder lock that enables the inner cylinder 05 to rotate when the boundary line between the upper and lower pins 04, 07 coincides with the share line L that is the boundary line between the outer cylinder 01 and the inner cylinder 05.

  FIGS. 29 and 30 show the locked state of the pin cylinder lock. A plurality of lower pins 07 arranged in a line from the key hole 08 in the depth direction (key insertion direction) are shown. The lower end is positioned on a straight line. This is because the depth D from the outer peripheral end of the inner cylinder 05 of the pin hole 06 in which the lower pin 07 slides is processed to be the same depth in all the pin holes 06. When the pin hole 06 is set to the same depth in this way, as a result, the lower end portion of the lower pin 07 is positioned on a straight line in the locked state.

  In order to unlock the pin cylinder lock, when the key K is inserted from the key hole 08 while moving the plurality of lower pins 07 against the elastic force of the spring 03, the lower end of the lower pin 07 is inserted into the key ring of the key K. When the parts abut and the combined key K is completely inserted into the keyhole 08, the boundary between the upper and lower pins 04, 07 coincides with the share line L and the unlocked state is established (see FIG. 31).

JP 2003-232145 A JP-A-9-132976 Japanese Patent Laid-Open No. 6-200666

  However, in the above-described conventional pin cylinder lock, a tool for unauthorized unlocking is inserted into the key hole 08, and the lower ends 07b of the plurality of lower pins 07,... In response to the springing of the lower pins 07,..., 07, the lower pins 04a of the upper pins 04,... 04 come into contact with the upper ends 07a of the lower pins 07,. Moves into the pin hole 02 of the outer cylinder 01 and the inner cylinder rotates. That is, there is a problem of being unlocked (picked).

  FIGS. 32 to 35 illustrate the operation from the initial stage of picking using such a tool for unauthorized unlocking to just before the completion of picking. Based on these figures, the above problems are solved. Detailed description.

  32 and 33, a symbol M is a bar constituting a part of an unauthorized unlocking tool (what is called a pick gun). This bar M is a metallic rod-shaped member, and is in the direction of arrow N in a state where it is brought into contact with the lower ends 07b,..., 07b of a plurality of lower pins 07,. Rocks.

  Then, by this swinging operation, as shown in FIGS. 34 and 35, the bar M flips up the lower ends 07b of all the lower pins 07,... In response to the jumping of the pins 07,..., 07, the lower pins 04a of the upper pins 04,. While moving down into the pin hole 02 of the cylinder 01, the lower pins 07,..., 07 are housed in the inner cylinder 05. As a result, the lower end portion 04a of the upper pin 04 and the upper end portion 07a of the lower pin 07 , And the upper pin 04 and the lower pin 07 do not exist on the share line L. By aiming at this moment and rotating the inner cylinder 05 in the unlocking direction with respect to the outer cylinder 01, picking is completed and unlocking becomes possible.

  Further, in addition to the pick gun as the above-described unauthorized unlocking tool, other unauthorized unlocking tools include, for example, the arrangement intervals of the plurality of lower pins 07,. There is also a key shape having a plurality of key piles at the same interval and a gripping portion continuous with the key pile, and in this case, a portion of the plurality of key piles described above is inserted into the key hole 08, and a hammer or the like is inserted in the insertion direction. It is also known to perform picking while grabbing the gripping portion while repeatedly hitting and applying rotational force in the unlocking direction. Similarly to the above-described pick gun, a plurality of the key piles and a plurality of lower pins 07,..., 07 are brought into contact with each other by impact of impact, and the plurality of lower pins 07,. As a result, as shown in FIG. 35, there is a possibility that the picking is completed and unlocked.

  An object of the present invention is to provide a pin cylinder lock which is difficult to be picked and has high crime prevention properties.

  In order to solve the above-described problems, the present invention prevents picking as described above by making it difficult to jump up at least one lower pin. More specifically, the present invention employs the following configuration.

  That is, the pin cylinder lock of claim 1 includes an outer cylinder, an inner cylinder that is rotatably inserted into the outer cylinder and has a key hole, and at least two columns or more provided in the outer cylinder and the inner cylinder. There are a pin hole, an upper pin that is movably provided with respect to the pin hole of the outer cylinder and is biased toward the inner cylinder by a spring, and a lower pin that is movably provided with respect to the pin hole of the inner cylinder. When the boundary between the upper and lower pins provided in the pin holes of the outer cylinder and the inner cylinder matches the share line that is the boundary line between the outer cylinder and the inner cylinder by the key, the inner cylinder can be rotated. In the pin cylinder lock, an unauthorized unlocking tool is inserted into the key hole of the inner cylinder when the pin cylinder lock is locked to apply an impact force to the lower pin provided in the inner cylinder. Two or more columns of the outer cylinder and the inner cylinder when impact force is applied The upper pin or the lower pin provided in the pin hole of at least one column among the pin holes provided in the plate is not subjected to the impact force by the unauthorized unlocking tool, or at least the lower pin even when the impact force is received. It is characterized in that means for preventing the inner cylinder from rotating in the unlocking direction by preventing the movement of the inner cylinder is provided.

  "Means to prevent the inner cylinder from rotating in the unlocking direction by not receiving the impact force from the unauthorized unlocking tool or by preventing at least the lower pin from moving even when the impact force is received" Is, for example, (1) by locking at least one of the plurality of pin holes of the inner cylinder into which the lower pin is inserted into a depth different from the depth of the other pin holes of the inner cylinder. (2) A step is formed in the pin hole of the plurality of inner cylinders into which the lower pin is inserted, and this step is formed on the lower pin. By engaging with the collar, in the locked state, the lower end of at least one lower pin is set to a height different from the lower end of the other lower pin, (3) provided in the pin hole of the inner cylinder Change the shape of the lower end (tip) of the lower pin (4) An intermediate pin is interposed at least at one location between the plurality of lower pins and the upper pin, and either one of the upper end portion or the lower end portion of the intermediate pin When the boundary between the upper pin and the lower pin coincides with the share line in the locked state and the turning force is applied to the inner cylinder by the unauthorized unlocking tool, the upper end of the intermediate pin is the pin of the outer cylinder. The intermediate pin and the lower pin cannot be moved by engaging with the peripheral edge of the hole. (5) The upper pin is moved or the inner cylinder is in contact with the upper portion of the intermediate pin and the lower portion of the upper pin. For example, an engagement concave portion and an engagement convex portion for preventing the rotation are provided.

  The pin cylinder lock of claim 2 is the pin cylinder lock according to claim 1, wherein the depth of at least one pin hole for accommodating the lower pin of the inner cylinder is different from the depth of the other pin holes of the inner cylinder. It is characterized by being.

  The pin cylinder lock according to claim 3 is a pin cylinder lock according to claim 1, wherein the lower pin forms a flange, while the pin hole of the inner cylinder that houses the lower pin is formed in a stepped shape having a step. In the locked state, the flange portion of the lower pin engages with a step portion of the pin hole of the inner cylinder, and at least one lower pin from the flange portion to the lower end portion of the lower pin is connected to the other lower pin. It is configured to be different from the length.

  The pin cylinder lock of claim 4 is a pin cylinder lock according to claim 1, wherein the lower pin forms a flange, while the pin hole of the inner cylinder that houses the lower pin is formed in a stepped shape having a step, In the locked state, the flange portion of the lower pin is engaged with the step portion of the pin hole of the inner cylinder, and at least one depth of the step portion is different from the depth of the other step portions. It is characterized by that.

  The pin cylinder lock according to claim 5 is the same as in claim 1, wherein the lower end portion of at least one lower pin provided in the pin hole of the inner cylinder has a shape different from the lower end portions of the other lower pins and is illegally unlocked. The tool is shaped so that the tool for use does not come into contact.

  The pin cylinder lock according to claim 6 includes an outer cylinder, an inner cylinder that is rotatably inserted into the outer cylinder and has a key hole, and a pin hole of at least two columns provided in the outer cylinder and the inner cylinder. An upper pin movably provided in the pin hole of the outer cylinder and biased toward the inner cylinder by a spring, a lower pin movably provided in the pin hole of the inner cylinder, and at least one set of the upper pins An intermediate pin interposed between the upper and lower pins, and a boundary between upper and lower pins provided in the pin hole of the outer cylinder and the inner cylinder by a combined key, and a boundary between the intermediate pin and the lower pin between the upper and lower pins In the pin cylinder lock that enables rotation of the inner cylinder when it coincides with a shear line that is a boundary line between the outer cylinder and the inner cylinder, the intermediate pin interposed between the upper pin and the lower pin is in a locked state Sometimes, the upper part of the intermediate pin is the outer cylinder When the rotational force is applied to the inner cylinder by an unauthorized unlocking tool, the upper end of the intermediate pin is aligned with the peripheral edge of the pin hole of the outer cylinder. The intermediate pin and the lower pin are configured so as to be unable to move to the pin hole of the outer cylinder by being engaged.

  A pin cylinder lock according to a seventh aspect of the present invention is the pin cylinder lock according to the sixth aspect, wherein an engagement concave portion and an engagement convex portion that engages with the engagement concave portion are provided at the contact portion between the upper portion of the intermediate pin and the lower portion of the upper pin. The engaging concave portion and the engaging convex portion are formed and allow the inner cylinder to be slightly rotated while maintaining the locked state in a state where the engaging concave portion and the engaging convex portion are engaged. It is characterized by being a fit.

  According to the first aspect of the present invention, when an unauthorized unlocking tool is inserted into the keyhole of the inner cylinder in the locked state and an impact force is applied, the pins of at least one column of the outer cylinder and the inner cylinder The inner cylinder is unlocked by preventing the upper pin or the lower pin provided in the hole from receiving an impact force by an unauthorized unlocking tool, or by preventing at least the lower pin from moving even if the impact force is received. Since means for preventing rotation in the direction is provided, the unlocking operation cannot be performed by rotating the inner cylinder in the unlocking direction, so that unauthorized unlocking can be prevented.

  According to the invention of claim 2, since the depth of at least one pin hole for accommodating the lower pin of the inner cylinder is formed to be different from the depth of the other pin holes of the inner cylinder, Even if an impact force is given to the lower part of the lower pin with an unauthorized unlocking tool, the upper part of all the lower pins can be lifted up at once and the possibility of unlocking can be eliminated.

  According to the invention of claim 3, the lower pin is formed with a flange portion, while the pin hole of the inner cylinder that accommodates the lower pin is formed in a stepped shape having a step portion, and the lower pin is in the locked state. The pin flange engages with the step of the pin hole of the inner cylinder, and the length from the flange to the lower end of the lower pin is at least one lower pin different from the length of the other lower pins Since the protrusion length of the at least one lower pin into the pin hole of the inner cylinder is set to be different from the protrusion length of the other lower pins, the lower ends of the plurality of lower pins are In the locked state, a step that is not located on the same line will be generated. For example, even if an impact is applied to the lower part of a certain lower pin with an unauthorized unlocking tool, The upper part can be lifted up at once, eliminating the possibility of unlocking

  According to the invention of claim 4, the lower pin is formed with a flange portion, while the pin hole of the inner cylinder that houses the lower pin is formed in a stepped shape having a step portion, and the lower pin is in the locked state. The flange portion of the pin is engaged with the step portion of the pin hole of the inner cylinder, and at least one of the step portions has a depth different from the depth of the other step portions. At the bottom end of at least one lower pin among the plurality of lower pins, a step that is not located on the same line is generated in the locked state. Even if an impact is given by a tool or the like, it is possible to eliminate the possibility that the upper parts of all the lower pins are jumped up at once and unlockable.

  According to invention of Claim 5, the lower end part of the at least 1 lower pin provided in the pin hole of the said inner cylinder is a shape different from the lower end part of another lower pin, and the tool for unauthorized unlocking is Since it is shaped so that it does not come in contact, even if an impact force is applied to the lower part of the lower pin with an unauthorized unlocking tool, the upper part of all the lower pins can be lifted up at once and unlocked. Can be eliminated.

  According to the invention of claim 6, in the locked state, the upper part of the intermediate pin interposed between the upper pin and the lower pin substantially coincides with a shear line that is a boundary line between the outer cylinder and the inner cylinder. When the turning force acts on the inner cylinder by the unauthorized unlocking tool, the upper end of the intermediate pin engages with the peripheral edge of the pin hole of the outer cylinder, and the intermediate pin and the lower pin move to the pin hole of the outer cylinder. For example, an unauthorized unlocking tool or the like is inserted into the keyhole, and a force for rotating the inner cylinder in the unlocking direction with the unauthorized unlocking tool is applied. Even if an upward impact is applied to the lower part of the pin, the upper part of the intermediate pin abuts against the outer cylinder so that the intermediate pin prevents the lower pin from jumping up. As a result, by using an unauthorized unlocking tool, all of the plurality of lower pins protruding into the keyhole and arranged in the depth direction are jumped up at once, and the upper portions of all the lower pins are instantaneously aligned with the share line. The possibility of unlocking can be eliminated.

  According to a seventh aspect of the present invention, an engagement concave portion and an engagement convex portion that engages with the engagement concave portion are formed in the contact portion between the upper portion of the intermediate pin and the lower portion of the upper pin, and the engagement The fitting between the recess and the engagement protrusion is set to allow slight rotation without unlocking while maintaining the engagement state between the engagement recess and the engagement protrusion. Insert an unauthorized unlocking tool into the keyhole, and apply an upward impact to the lower part of the lower pin while applying a force to rotate the inner cylinder in the unlocking direction with the unauthorized unlocking tool. Also, the intermediate pin acts to prevent the lower pin from jumping up when the upper portion of the intermediate pin is in contact with the outer cylinder. As a result, by using an unauthorized unlocking tool, all of the plurality of lower pins protruding into the keyhole and arranged in the depth direction are jumped up at once, and the upper portions of all the lower pins are instantaneously aligned with the share line. The possibility of unlocking can be eliminated.

  (First Embodiment) In this first embodiment, the lower end of the lower pin is positioned on a straight line so that an unauthorized unlocking tool is inserted into the keyhole and all the lower pins are not flipped up at once. It is intended to prevent picking by arranging so as not to. That is, the lower end (tip) position of the lower pin is changed in the locked state by changing the depth of the pin holes 6... 6 provided in the inner cylinder 5 so as to intersect the key hole 8 of the inner cylinder 5. It is. The specific configuration of the first embodiment will be described below with reference to FIGS.

  1 is a longitudinal sectional view showing the locked state of the first embodiment of the present invention, FIG. 2 is a front view showing the locked state of the first embodiment of the present invention, FIG. 3 is a perspective view of the outer cylinder, and FIG. 5 is a plan view of the inner cylinder, FIG. 6 is a sectional view taken along the line BB in FIG. 5, FIG. 7 is a sectional view taken along the line AA in FIG. 1, and FIG. FIG. 9 is a longitudinal sectional view showing a state where an unauthorized unlocking tool is inserted into the keyhole of FIG.

  In the pin cylinder lock of the first embodiment, the outer cylinder 1 having pin holes 2a, 2b, 2c, 2d, 2e, and 2f (these pin holes are sometimes simply referred to as pin holes 2), An inner cylinder 5 having pin holes 6a, 6b, 6c, 6d, 6e, 6f (these pin holes are sometimes collectively referred to as pin holes 6) and a key hole 8 is rotatably fitted, In the pin holes 2a to 2f of the outer cylinder 1, upper pins 4a, 4b, 4c, 4d, 4e, and 4f urged toward the inner cylinder 5 by springs 3,. The lower pin 7a, 7b, 7c, 7d, 7e, 7f (the lower pins are collectively referred to simply as the lower pin 7). In some cases) are slidably inserted. The pin holes 2a to 2f of the outer cylinder 1 are covered with a cover 1A.

  Then, as shown in FIG. 8, a regular key K is inserted into the key hole 8 of the inner cylinder 5 and the key ridges K1... K6 of the key K and the lower ends 7a1, 7b1, 7c1, 7d1, 7e1, 7f1 of the lower pin 7 are obtained. Come into contact with each other, and each of the lower pins 7 is moved up by a different stroke S. The upwardly moving stroke S is different from the strokes S1, S2, S3, S4, S5, and S6 in the pin cylinder-lock of the first embodiment, but is not limited thereto.

  When the key K is inserted to the key hole 8 to a predetermined unlocking position, the boundary line between the upper and lower pins 4a to 4f and 7a to 7f is the boundary line between the outer cylinder 1 and the inner cylinder 5 Thus, the inner cylinder 5 can be rotated, and the inner cylinder 5 can be operated to operate a locking / unlocking member (not shown) of the lock body to be locked / unlocked. The boundary line is a portion where the lower end portion 4a2 of the upper pin 4a and the upper end portion 7a2 of the lower pin 7a are in contact, a portion where the lower end portion 4b2 of the upper pin 4b and the upper end portion 7b2 of the lower pin 7b are in contact, The portion where the lower end 4c2 of the pin 4c and the upper end 7c2 of the lower pin 7c are in contact, the portion where the lower end 4d2 of the upper pin 4d and the upper end 7d2 of the lower pin 7d are in contact, and the lower end 4e2 of the upper pin 4e This corresponds to the portion where the upper end 7e2 of the lower pin 7e is in contact, and the portion where the lower end 4f2 of the upper pin 4f and the upper end 7f2 of the lower pin 7f are in contact.

  One or a plurality of the upper pins 4 (all six in the first embodiment) are cylindrical, and the upper portions 4a1, 4b1, 4c1, 4d1, 4e1, and 4f1 of the trunk portion are housed in springs. A recess is provided to accommodate the spring 3. Further, the outer diameter of the body portion of the upper pin 4 (4a to 4f) and the inner diameter of the pin hole 2 (2a to 2f) and the pin hole 6 (6a to 6f) are substantially the same, as shown in FIGS. Thus, the upper pin 4 can move between the pin holes 2 and 6 without any trouble.

  On the other hand, in the cylindrical space formed by the upper pin 4 and the two pin holes 2 and 6, the lower pin 7 that is disposed oppositely in the locked state shown in FIGS. 1 and 7 is also the same as the upper pin 4. It has a cylindrical shape with a diameter so that the pin hole 6 of the inner cylinder 5 can be moved without hindrance.

  Of the pin holes 6a to 6f in which the lower pins 7a, 7b, 7c, 7d, and 7f are accommodated, the depth from the outer periphery of the inner cylinder 5 is set to the four pin holes 6a, 6c, 6e, and 6f. The depth of the hole is defined as dimension D, the depth of the two holes of the pin holes 6b and 6d is defined as dimension d, and the relationship between the dimensions D and d is set so that D> d. In this first embodiment, the depth of two of the six pin holes 6 is different from the other depths, but the depth of all the pin holes 6 may be different. Only one depth may be changed, and the design can be changed as appropriate. However, by making the depth of the plurality of pin holes 6 alternately different in the depth direction of the key hole 8, a tool for unauthorized unlocking as described later is inserted into the key hole 8 and all of the lower pins 7 are inserted. Of course, it becomes more difficult to jump up at once, and the effect of preventing picking is improved. That is, the feature of this first embodiment is that the depth of the pin holes 6a, 6b, 6c, 6d, 6e, 6f for accommodating the lower pins 7a, 7b, 7c, 7d, 7e, 7f of the inner cylinder 5 is There is a feature in that two types of dimensions D and d are set from the outer periphery of the cylinder 5. If this depth is set to be different for all the pin holes 6 of the lower pins 7, the picking prevention effect is further improved. However, if at least one pin hole 6 has a size different from that of the other pin holes 6. It has an effect of preventing picking.

  Next, it will be described with reference to FIG. 9 that the pin cylinder lock of the first embodiment described above has an effect of preventing picking. FIG. 9 shows a state in which a bar M of an unauthorized unlocking tool is inserted into the keyhole 8 with respect to FIG.

  As shown in FIG. 9, in the case of this picking operation, in the case of the conventional pin cylinder lock shown above, the bar M of the inserted unlocking tool is applied to all the lower end portions of the lower pins. However, in this first embodiment, an unauthorized unlocking tool bar M is inserted into the keyhole 8, and this bar M is inserted into all of the lower end portions 7a1, 7b1, 7c1, 7d1, 7e1, 7f1 of the lower pin 7. Even if it tries to contact, it does not contact the lower pins 7b and 7d. Therefore, even if the bar M is swung in the upper N direction and the upper pin 4 is pushed up by an impact force that pushes up the lower pin 7, the bar M is not in contact with the lower pins 7b and 7d. It is difficult to push up simultaneously with 7a, 7c, 7e, and 7f, and even if it can be pushed up, it is difficult to position the boundary lines of all the lower pins and the upper pins on the share line L at the same time. Therefore, the possibility of picking can be eliminated.

  Although not shown, in addition to an unauthorized unlocking tool that inserts a bar-like bar M as described above and mechanically swings it up and down by operating a lever handle or the like, it has the same shape as a key not shown. There is an unauthorized unlocking tool having a vibration transmission bar in which a key ring-shaped portion and a key groove-shaped portion are alternately formed, and a grip portion continuous with the bar. While applying the rotational force in the unlocking direction, with the bar in contact with the lower pin 7, the gripping portion is hit with a hammer or the like, and the lower pin 7 is flipped upward by the action of the key mountain-shaped portion. There is also a picking action. However, even in this case, similarly to the above-described picking using the bar M, the lower pin 7 is prevented from jumping up by a step at the lower position of the lower pin 7 caused by the difference in the depth of the pin hole 6, or As a result, it becomes difficult for the boundary between all the lower pins 7 and the upper pins 4 to be located on the share line L at a certain moment. As a result, an effect of preventing picking can be obtained.

  Second Example A second example will be described below based on FIGS. 10 and 11. 10 is a longitudinal sectional view showing a locked state of the second embodiment of the present invention, and FIG. 11 is a sectional view taken along the line CC of FIG. In the first embodiment described above, when the inner cylinder 5 is impacted by an unauthorized unlocking tool, for example, the boundary between the upper and lower pins 4 and 7 of the pin holes 2 and 6 of the outer cylinder 1 and the inner cylinder 5 is changed. As a means for preventing the shear line L from being aligned with the boundary line between the outer cylinder 1 and the inner cylinder 5, the depth of one pin hole 6 that accommodates the lower pin 7 of the inner cylinder 5 is the other pin hole 6. However, in this second embodiment, the lower pins 17a, 17b, 17c, 17d, 17e, and 17f (which are received in the pin holes 16a to 16f of the inner cylinder 15) are adopted. These lower pins are collectively referred to simply as the lower pin 17.) While the flange portions 17a3, 17b3, 17c3, 17d3, 17e3, and 17f3 are formed on the lower pins 17, a plurality of pin holes 16a that accommodate the lower pins 17 respectively. , 16b, 16c, 16d, 16e, 16f These pin holes are collectively referred to simply as a pin hole 16). Each of the pin holes is formed into a stepped shape having step portions 16a1, 16b1, 16c1, 16d1, 16e1, and 16f1, and a flange portion of the lower pin 17 is formed. 17a3, 17b3, 17c3, 17d3, 17e3, 17f3 and the stepped portions 16a1, 16b1, 16c1, 16d1, 16e1, 16f1 of the pin hole 16 are engaged, so that the spring 3 indirectly biases the keyhole 8 direction. In the locked state, the positions of the lower ends 17a1, 17b1, 17c1, 17d1, 17e1, and 17f1 of the plurality of lower pins 17 are set so as not to be located on the same line.

  That is, in the case of this second embodiment, the lower ends 17a1, 17c1, 17e1, and 17f1 of the lower pins 17a, 17c, 17e, and 17f have a depth (length) H dimension from the outer periphery of the inner cylinder 15, and the lower pin 17b 17d, the lower end portions 17b1 and 17d1 of the inner cylinder 15 have a depth (length) h dimension from the outer periphery of the inner cylinder 15, and are set so as to have a dimensional relationship of H> h.

  The step portions 16a1, 16b1, 16c1, 16d1, 16e1, and 16f1 of the pin hole 16 of the inner cylinder 15 are set at the same height so that they are all equidistant P from the outer periphery of the inner cylinder 15, and the lower portion ( Unlike the first embodiment, all of them are set to have a constant distance D from the outer periphery of the inner cylinder 15. The heights of the flange portions 17a3, 17b3, 17c3, 17d3, 17e3, and 17f3 of the lower pins 17a to 17f are different from each other. Therefore, as shown in FIG. 10, each lower pin 17a is in the locked state. ˜17f has a step when viewed from the plane. In other words, the length from the flanges 17b3, 17d3 to the lower end of the latter lower pins 17b, 17d is from the flanges 17a3, 17c3, 17e3, 17f3 to the lower end of the lower pins 17a, 17c, 17e, 17f. It is shorter than the length.

  Also in the second embodiment, at the time of locking, the positions of the lower ends 17a1, 17b1, 17c1, 17d1, 17e1, and 17f1 of the lower pin 17 (17a, 17b, 17c, 17d, 17e, and 17f) are located on the same line. Therefore, the possibility of picking can be eliminated as in the first embodiment described above. That is, a tool for unauthorized unlocking is inserted from the key hole 8 to give an impact to the lower pin 17 and the upper pin is flipped up through the lower pin 17 so that the flanges 17a3, 17b3 and 17c3 of the plurality of lower pins 17 , 17e3, 17f3 is difficult because the lower end portions 17a1, 17b1, 17c1, 17d1, 17e1, 17f1 of the lower pin 17 are not located on the same line as in the prior art. It becomes.

  In FIGS. 10 and 11, the same reference numerals as those shown in FIGS. 1 to 9 are the same as those in the first embodiment described above, and the repeated description is omitted. is doing.

  (Third Example) A third example will be described below with reference to FIGS. 12 and 13. FIG. 12 is a longitudinal sectional view showing a locked state of the third embodiment of the present invention, and FIG. 13 is a sectional view taken along the line DD of FIG.

  In the second embodiment described above, as a means for preventing the lower end portion of the lower pin 17 from being located on the same line in the locked state, the lower end portion 17a1 from the flange portions 17a3, 17b3, 17c3, 17d3, 17e3, 17f3 of the lower pin 17 is used. , 17b1, 17c1, 17d1, 17e1, and 17f1 are achieved by making the distances non-identical, but in the third embodiment, a plurality of lower pins 27a, 27b, 27c, 27d, 27e, The flanges 27a3, 27b3, 27c3, 27d3, 27e3, and 27f3 are formed on the 27f (thereby, these lower pins may be collectively referred to simply as the lower pin 27), while a plurality of pins that store the lower pin 27 are formed. Step portions 26a1, 26b1, 26c1, 26d1, 26e1, and 26f1 are formed in which the depths of the holes 26 are not the same.

  That is, among the plurality of step portions 26a1, 26b1, 26c1, 26d1, 26e1, 26f1, the depth of the pin hole from the outer periphery of the inner cylinder 25 is P1 for 26a, 26c, 26e, 26f, and P2 for 26b, 26d. Yes, the relationship between P1 and P2 is P1> P2. That is, the depth of the latter step portions 26b and 26d is made deeper (longer) than the depth of the former step portions 26a, 26c, 26e, and 26f. Thereby, even when the lower pin 27 is, for example, the same lower pin, the lower end portions 27a1, 27b1, 27c1, 27d1, 27e1, and 27f1 of the lower pin 27 can be configured not to be located on the same line. Therefore, in the case of the second embodiment, when the depth from the outer periphery of the inner cylinder 15 to the step portions 16a1, 16b1, 16c1, 16d1, 16e1, 16f1 of the pin hole 16 is the same depth P, At least from the relationship that the lengths from the flanges 17a3, 17b3, 17c3, 17d3, 17e3, 17f3 of the lower pin 17 to be inserted into the pin holes to the lower ends 17a1, 17b1, 17c1, 17d1, 17e1, 17f1 are not identical. One lower pin 17 needs to be differentiated and used as a different part from the other lower pin 17, but in the third embodiment, the same lower pin 27 can be employed. As a result, the types of parts can be reduced, and the manufacturing cost can be reduced.

  In FIGS. 12 and 13, the same reference numerals as those shown in FIGS. 1 to 11 are the same as those in the other embodiments described above, so that repeated description is omitted. is doing.

  (Fourth Example) A fourth example will be described below with reference to FIGS. 14 and 15. FIG. 14 is a longitudinal sectional view showing a locked state of the fourth embodiment of the present invention, and FIG. 15 is a longitudinal sectional view of a state where an unauthorized unlocking tool is inserted in the locked state of FIG.

  The pin cylinder lock of the fourth embodiment has the same depth (length) of the pin holes 6 (6a to 6f) of the inner cylinder 5 as known in the art, as compared with that of the first embodiment. And the lower end portion (including the lower peripheral edge portion) of at least one lower pin 7 among the lower pins 7 (7a to 7f) housed in the pin holes 6 is used as a tool for unauthorized unlocking. Since it has a feature that it is shaped so as not to contact, and the other configuration is the same as that of the first embodiment shown in FIGS. 1 to 9, FIG. 14 and FIG. The same reference numerals as those in FIG.

  That is, in this embodiment, the lower pins 7a, 7d, and 7f have a pointed conical shape and the lower pins 7b, 7c, and 7e have a truncated conical shape. In the locked state, it is as shown in FIG.

  With the above configuration, as shown in FIG. 15, in the locked state, when the key-shaped unauthorized unlocking tool bar M as described above is inserted into the key hole 8 of the inner cylinder 5, the lower pins 7a, Since the lower ends 7a1, 7d1, 7f1 of 7d, 7f and the key piles M6, M3, M1 of the bar M cannot be separated and contacted, only when an upward impact force is applied to the bar M Even when an impact force in the front-rear direction is applied, the boundary between the upper pin 4 and the lower pin 7 and the share line L that is the boundary line between the outer cylinder 1 and the inner cylinder 5 cannot be matched. It is not locked.

   That is, in the locked state of FIG. 15, even if the bar M is moved by applying an impact force in the upward direction or the front-rear direction, the key mountain M2 of the bar M and the lower end portion 7e1 of the lower pin 7e are engaged, Similarly, since M4 and 7c1 and M5 and 7b1 are engaged with each other, it is difficult to move all of the lower pins up with this unauthorized unlocking tool. It is difficult to move all of the lower pins 7 by moving the tool in the front-rear direction.

   Further, with respect to the pin cylinder lock of the fourth embodiment, a bar M of an unauthorized unlocking tool such as a pick gun as shown in FIG. 9 or FIGS. 32 to 35 is inserted into the key hole 8 of the inner cylinder, When an impact force is applied upward on the outer cylinder 1 side, as described above, the lower ends 7a1, 7d1, 7f1 of the lower pins 7a, 7d, 7f and the key pile M6 of the bar M of the unauthorized unlocking tool. , M3, and M1, the lower pins 7a, 7d, and 7f are not subjected to the impact force by the bar M. Therefore, when an impact is applied by the bar M, the upper pin of the column moves beyond the share line L by the lower pin that comes into contact with the key piles M5, M4, and M2, but does not come into contact with the key piles M6, M3, and M1. Since the upper pin of the column does not move (because the locked state is maintained), the inner cylinder 5 cannot be rotated in the unlocking direction and cannot be unlocked.

  (5th Example) Based on FIGS. 16-24, a 5th Example is described below. 16 is a longitudinal sectional view showing a locked state of the fifth embodiment of the present invention, FIG. 17 is a sectional view taken along line EE of FIG. 16, and FIG. 18 is a longitudinal sectional view of a state in which a key is inserted into the key hole of the inner cylinder. 19 is a cross-sectional view taken along E1-E1 in FIG. 18, FIG. 20 is a cross-sectional view taken along F1-F1 in FIG. 18, FIG. 21 is a vertical cross-sectional view showing a state in which an unauthorized unlocking tool is inserted into the keyhole in FIG. FIG. 23 is a longitudinal sectional view showing an operation when an unauthorized unlocking tool is inserted into the keyhole of FIG. 16 and an unauthorized unlocking operation is performed, FIG. 23 is an E3-E3 sectional view of FIG. 22, and FIG. It is FF sectional drawing of FIG. 16 which shows a locked state.

  By the way, in the said 1st-3rd Example, it comprises so that each lower end part 7a1-7f1, 17a1-17f1,27a1-27f1 of the lower pins 7, 17, and 27 may not be located on the same line in a locked state. In this fifth embodiment, picking is prevented by causing the lower pin to jump up all at once so that the boundary line between the lower pin and the upper pin does not instantaneously coincide with the share line L. Focusing on the fact that some member such as the bar M for unauthorized unlocking operation is inserted into the keyhole 8 and the act acts on the member, the act acts on the inner cylinder 5 via the member. Picking prevention is achieved by employing means for preventing the lower pins 7a, 7b, 7c, 7d, 7e, 7f from moving upward.

  More specifically, the outer cylinder 1, the inner cylinder 5 having a key hole 8 and rotatably inserted into the outer cylinder 1, and the plurality of pin holes 2 a provided in the outer cylinder 1 and the inner cylinder 5. , 2b, 2c, 2d, 2e, 2f (these pin holes may be collectively referred to simply as pin holes 2) and 6a, 6b, 6c, 6d, 6e, 6f (collectively referring to these pin holes). And an upper pin 4a that is movably provided to each of the plurality of pin holes 2 of the outer cylinder 1 and is urged toward the inner cylinder 5 by the spring 3. , 4b, 4c, 4d, 4e, 4f (these upper pins may be collectively referred to simply as the upper pin 4) and the plurality of pin holes 6,. Lower pins 7a, 7b, 7c, 7d, 7e, and 7f (in the case where these lower pins are collectively referred to as a lower pin 7) And intermediate pins 9b, 9d, 9f interposed between at least one pair of the upper pin 4 and the lower pin 7 (these intermediate pins may be simply referred to as the intermediate pin 9 in some cases). The boundary between the upper and lower pins 4, 7 not interposing the intermediate pin 9 in the pin holes 2, 6 of the outer cylinder 1 and the inner cylinder 5 by the key and the boundary between the intermediate pin 9 and the lower pin 7 are the outer cylinder. 1 is a pin cylinder lock that enables the inner cylinder 5 to be rotated when it coincides with a share line L that is a boundary line between the inner pin 5 and the inner cylinder 5. The intermediate pin 9 interposed between the upper pin 9 and the upper pin 9b1, 9d1, 9f1 is disposed at a position substantially coincident with the share line L which is a boundary line between the outer tube 1 and the inner tube 5, It is configured so that it cannot be unlocked with an unauthorized unlocking tool.

  Further, a master pin 10 for a master key device is further interposed between the lower pin 7b and the intermediate pin 9b. This master pin 10 is a conventionally known one that can be unlocked when the boundary between the master pin 10 and the lower pin 7b is positioned on the share line L.

  In the fifth embodiment described above, as shown in FIG. 16, the lower ends 7a1, 7b1, 7c1, 7d1, 7e1, 7f1 of the lower pins 7,..., 7 are arranged on a straight line. Alternatively, the lower end portion (for example, 7a1, 7c1, 7e1) of the lower pin 7 not including the intermediate pin 9 may be set to be positioned higher than the position of the lower end portion of the other lower pin 7. If comprised in this way, it becomes possible to increase the picking prevention effect as shown to the 1st-3rd Example mentioned above.

  As shown in FIGS. 18 to 20, a normal key K is inserted into the key hole 8 of the inner cylinder 5, and the key K1... Key K6 of the key K and the lower ends 7 a 1, 7 b 1, 7 c 1, 7 d 1, 7 e 1 of the lower pin 7. , 7f1 are in contact with each other, and the lower pins 7 are moved up with different strokes. This upward movement is the same as that in FIG.

  When the key K is inserted into the key hole 8 up to a predetermined unlocking position, the boundary 4a2 between the upper and lower pins 4, 7 and the upper end 7a2 of the lower pin, 4c2 and 7c2, 4e2 and 7e2, When the boundaries 4b2, 9b1, 4d2, 9d1, 4f2, and 9f1 between the upper pin 4 and the intermediate pin 9 coincide with a share line L that is a boundary line with the inner cylinder 5, the inner cylinder 5 is rotated. It becomes possible, and the locking / unlocking member (not shown) of the lock body is operated by the rotation of the inner cylinder 5 so that the locking / unlocking can be performed.

  Next, it will be described based on FIGS. 21 to 23 that the pin cylinder lock of the fifth embodiment described above has an effect of preventing picking. FIG. 21 shows a tool bar M for unauthorized unlocking inserted into the keyhole 8 with respect to the pin cylinder lock in the locked state of FIG. 16 (showing the state where the upper and lower pins 4 and 7 are urged by the panel 3). The state is added. FIG. 22 shows a state in which the upper pin 4a is pushed up to the unlock position above the share line L by the bar M via the lower pin 7a. However, in the case of this cylinder lock, there is a high possibility that the upper pin 4a and the lower pin 7a closest to the insertion hole of the keyhole 8 are pushed up by the elasticity of the bar M (including the action of being repelled). As for the lower pins 7b to 7f on the far side from these, as shown in FIG. 23, the upper portions 9b1, 9d1, 9f1 of the intermediate pins 9 (9b, 9d, 9f) are driven by the rotational force in the unlocking direction with respect to the inner cylinder 51. The upper end of the intermediate pin is in contact with the peripheral edge of the pin hole 2 of the outer cylinder 1, that is, the upper movement is prevented so as not to move up at the contact O on the inner circumference 1B of the outer cylinder 1 (see FIG. 23). It is.

  That is, in this cylinder lock, the upper part 9b1, 9d1, 9f1 of the intermediate pin 9 interposed between the upper pin 4 and the lower pin 7 is the boundary between the outer cylinder 1 and the inner cylinder 5 in the locked state of the cylinder lock. Since it is arranged at a position substantially coinciding with the share line L as a line, when rotational force is applied to the inner cylinder 5 to unlock it, a slight rotational movement R occurs as shown in FIG. By this rotational movement R, the upper portion 9b1 is prevented from moving upward in the N1 direction by the inner periphery 1B of the inner cylinder 1 and the contact point O. Therefore, the bar M is bounced upwards through the lower portion 7b1 of the lower pin 7b, the lower portion 10b of the master pin 10, the upper portion 10a of the master pin 10, the lower portion 9b2 of the upper pin 9b, and the upper portion 9b1 of the lower pin 9b. Even if an impact is applied to the lower part 4b2 of the upper pin 4 and the upper pin 9b is moved upward, the upper pin 9b does not move upward from the contact point O, so the lower pin 7 cannot be flipped. Therefore, it is possible to prevent the picking up by preventing the jumping-up, and thus eliminating the possibility that the boundary line between all the lower pins 7 and the upper pins 4 is located on the share line L. .

  FIG. 24 shows a state in which the key K is removed from the state in which the key K in FIG. 20 is inserted, that is, a locked state. At this time, the boundary between the lower portion 4d2 of the upper pin 4d and the upper portion 9d1 of the intermediate pin 9d coincides with the share line L. At the boundary between the upper portion 9d1 of the intermediate pin 9d and the lower portion 4d2 of the upper pin 4d, Although the inner cylinder 5 is allowed to rotate, the boundaries between the other lower pin 7a, upper pin 4a, lower pin 7c, upper pin 4c, lower pin 4d, and upper pin 7d do not coincide with the share line. The movement is limited to the rotation distance R shown in FIG. Further, the boundary between the upper portion 9b1 of the intermediate pin 9b and the lower portion 4b2 of the upper pin 4b, and the boundary between the upper portion 9f1 of the intermediate pin 9f and the lower portion 4f2 of the upper pin 4f are also the lower portions of the upper portion 9d1 and the upper pin 4d of the intermediate pin 9d. Similarly to the boundary with 4d2, in the locked state of FIG. 16, the boundary coincides with the share line L and allows the inner cylinder 5 to rotate, but is limited to movement by the rotation distance R shown in FIG. ing.

  Although not shown, in addition to an unauthorized unlocking tool that inserts a bar-like bar M as described above and mechanically swings it up and down by operating a lever handle or the like, it has the same shape as a key not shown. There is a tool for unauthorized unlocking, which includes a vibration transmission bar M in which a key ring portion and a key groove portion are alternately formed, and a grip portion continuous with the bar M. While applying a rotational force in the unlocking direction to the part, while the bar M is in contact with the lower pin 7, the gripping part is hit with a hammer or the like, and the lower pin 7 is moved upward by the action of the key mountain-shaped part There is also a picking action that jumps up. However, even in this case, the picking prevention effect can be expected since the upper part of the intermediate pin 9 comes into contact with the inner cylinder 1B and is prevented from moving upward, similarly to the picking using the bar M described above.

  In FIGS. 16 to 24, the same reference numerals as those shown in FIGS. 1 to 13 denote the same parts as those in the other embodiments described above, so that repeated description is omitted. is doing.

  (Sixth Example) A sixth example will be described below with reference to FIGS. 25 and 26. FIG. 25 is a cross-sectional view of the sixth embodiment, and FIG. 26 is a cross-sectional view showing an operation when an unauthorized unlocking operation is performed by inserting a tool for unauthorized unlocking into the keyhole of FIG.

  In the sixth embodiment, in the fifth embodiment, since the boundary between the intermediate pin 9 and the upper pin 4 coincides with the share line L during the picking operation shown in FIG. 23, the intermediate pin 9 and the upper pin 4 itself. Is a structure in which the rotation of the inner cylinder 5 cannot be prevented by directly acting to the structure that can also prevent the rotation.

  That is, the engaging recess 19d3 is formed in the upper portion 19d1 of the intermediate pin 19d that contacts the upper portion 7d2 of the lower pin 7, while the engaging protrusion 14d3 that engages with the engaging recess 19d3 is formed in the lower portion 14d2 of the upper pin 14d. The configuration provided in is adopted. FIG. 26 shows a state in which the picking operation is performed and the inner cylinder 5 is slightly rotated. When the inner cylinder 5 rotates in this way, the engagement concave portion 19d3 and the engagement convex portion 14d3 are moved. Engagement prevents rotation and prevents picking more reliably.

  In FIGS. 25 to 26, the same reference numerals as those shown in FIGS. 1 to 24 are the same as those in the other embodiments described above, so that the repeated description is omitted. is doing.

  (Seventh Embodiment) A seventh embodiment will be described below with reference to FIGS. FIG. 27 is a cross-sectional view of the seventh embodiment, and FIG. 28 is a cross-sectional view showing the operation when an unauthorized unlocking operation is performed by inserting a tool for unauthorized unlocking into the keyhole of FIG.

  The seventh embodiment is a modification of the sixth embodiment. In the sixth embodiment, the engagement concave portion 19d3 is provided on the intermediate pin 19 side, and the engagement convex portion 14d is provided on the upper pin 14d side. However, in the seventh embodiment, this is reversed, and the engagement concave portion 24d3 is provided. Is provided on the lower part 24d2 of the upper pin 24d, and the engaging convex part 29d3 is provided on the upper part of the intermediate pin 29d. The effect of the seventh embodiment is that the inner cylinder 5 can be prevented from rotating in the unlocking direction by the engagement of the engaging recess 29d3 and the engaging protrusion 24d3, as in the sixth embodiment. In the seventh embodiment, even when the intermediate pin 29 is flipped upward via the lower pin, the engagement projection 29d3 of the intermediate pin 29 engages with the engagement recess 24d3 of the upper pin 24. There is an advantage that cannot be rotated.

  In FIGS. 27 to 28, the same reference numerals as those shown in FIGS. 1 to 26 are the same as those in the other embodiments described above, so that repeated description is omitted. is doing.

  The pin cylinder lock of the present invention can be used not only as a building but also as a crime prevention lock that can be prevented from picking by being attached to a door of a vehicle or furniture.

It is a longitudinal cross-sectional view which shows the locking state of the 1st Example of this invention. It is a front view which shows the locking state of the 1st Example of this invention. It is a perspective view of an outer cylinder. It is a longitudinal cross-sectional view of an inner cylinder. It is a top view of an inner cylinder. It is BB sectional drawing of FIG. It is AA sectional drawing of FIG. It is a longitudinal cross-sectional view of a state in which the key is inserted into the key hole of the inner cylinder. It is a longitudinal cross-sectional view which shows the state which inserted the tool for unauthorized unlocking in the keyhole of FIG. It is a longitudinal cross-sectional view which shows the locked state of 2nd Example of this invention. It is CC sectional drawing of FIG. It is a longitudinal cross-sectional view which shows the locked state of the 3rd Example of this invention. It is DD sectional drawing of FIG. It is a longitudinal cross-sectional view which shows the locked state of 4th Example of this invention. It is a longitudinal cross-sectional view of the state which inserted the tool for unauthorized unlocking in the locked state of FIG. It is a longitudinal cross-sectional view which shows the locked state of 5th Example of this invention. It is EE sectional drawing of FIG. It is a longitudinal cross-sectional view of a state in which the key is inserted into the key hole of the inner cylinder. It is E1-E1 sectional drawing of FIG. It is F1-F1 sectional drawing of FIG. It is a longitudinal cross-sectional view which shows the state which inserted the tool for unauthorized unlocking in the keyhole of FIG. It is a longitudinal cross-sectional view which shows an effect | action at the time of inserting the tool for unauthorized unlocking in the keyhole of FIG. 16, and performing unauthorized unlocking operation. It is E3-E3 sectional drawing of FIG. It is FF sectional drawing of FIG. 16 which shows the state which extracted the key, and the locking state. It is sectional drawing of the 6th Example of this invention. It is a longitudinal cross-sectional view which shows an effect | action at the time of inserting the tool for unauthorized unlocking in the keyhole of FIG. 25, and performing unauthorized unlocking operation. It is sectional drawing of the 7th Example of this invention. It is a longitudinal cross-sectional view which shows an effect | action at the time of inserting the tool for unauthorized unlocking in the keyhole of FIG. 27, and performing unauthorized unlocking operation. It is a longitudinal cross-sectional view of the locked state of the conventional pin cylinder lock. It is GG sectional drawing of FIG. It is the longitudinal cross-sectional view made into the unlocked state which inserted the key in the keyhole in the locked state of FIG. FIG. 30 is a longitudinal sectional view showing an initial picking state in which a bar for flipping up a lower pin, which is a kind of unauthorized unlocking tool, is inserted from the keyhole in the locked state of FIG. 29. It is G1-G1 sectional drawing of FIG. 32. Immediately before the completion of picking in which the lower pin jumping bar is brought into contact with the lower part of the lower pin and the upper pin is lifted up through the lower pin from the initial picking state of FIG. It is a longitudinal cross-sectional view which shows the state. It is G2-G2 sectional drawing of FIG.

Explanation of symbols

1 Outer cylinder 2 (2a to 2f) Pin hole 3 Spring 4 (4a to 4f), 14 (14a to 14f), 24 (24a to 24f) Upper pin 5, 15, 25 Inner cylinder 6 (6a to 6f), 16 (16a-16f), 26 (26a-26f) Pin hole 7 (7a-7f), 17 (17a-17f), 27 (27a-27f) Lower pin 8 Key hole 9, 19, 29 Intermediate pin 10 Master pin K Key lock L Share line M Bar for tools for unauthorized unlocking

Claims (7)

An outer cylinder, an inner cylinder that is rotatably inserted into the outer cylinder and has a key hole, a pin hole of at least two columns provided in the outer cylinder and the inner cylinder, and a pin hole of the outer cylinder An upper pin that is movably provided and biased toward the inner cylinder by a spring, and a lower pin that is movably provided with respect to the pin hole of the inner cylinder. In the pin cylinder lock that enables rotation of the inner cylinder when the boundary between the upper and lower pins provided in the pin hole coincides with the shear line that is the boundary line between the outer cylinder and the inner cylinder,
An improper unlocking tool for unlocking by applying an impact force to the lower pin provided in the inner cylinder was applied to the key hole of the inner cylinder when the pin cylinder lock was locked, and the impact force was applied. Sometimes, an upper pin or a lower pin provided in a pin hole of at least one column out of pin holes provided in two or more columns of the outer cylinder and the inner cylinder receives an impact force from the unauthorized unlocking tool. A pin cylinder lock provided with means for preventing the inner cylinder from rotating in the unlocking direction by preventing at least the lower pin from moving even when receiving an impact force.   2. The pin cylinder according to claim 1, wherein a depth of at least one pin hole that accommodates a lower pin of the inner cylinder is different from a depth of other pin holes of the inner cylinder. Tablets.   While the lower pin is formed with a flange, the pin hole of the inner cylinder that houses the lower pin is formed in a stepped shape having a step, and the flange of the lower pin is a pin of the inner cylinder when locked. The lower pin engages with a stepped portion of the hole, and the length from the flange portion to the lower end portion of the lower pin is configured such that at least one lower pin is different from the length of the other lower pins. The pin cylinder lock according to claim 1.   While the lower pin is formed with a flange, the pin hole of the inner cylinder that houses the lower pin is formed in a stepped shape having a step, and the flange of the lower pin is a pin of the inner cylinder when locked. 2. The pin cylinder lock according to claim 1, wherein the pin cylinder lock is engaged with a step portion of the hole, and at least one of the step portions has a depth different from that of the other step portion.   The lower end portion of at least one lower pin provided in the pin hole of the inner cylinder has a shape different from the lower end portions of the other lower pins and a shape that does not come into contact with an unauthorized unlocking tool. The pin cylinder lock according to claim 1. An outer cylinder, an inner cylinder that is rotatably inserted into the outer cylinder and has a key hole, a pin hole of at least two columns provided in the outer cylinder and the inner cylinder, and a pin hole of the outer cylinder An upper pin that is movably provided and is urged toward the inner cylinder by a spring, a lower pin that is movably provided in the pin hole of the inner cylinder, and an intermediate interposed between at least one pair of the upper pin and the lower pin The boundary between the upper and lower pins provided in the pin holes of the outer cylinder and the inner cylinder by a key and the boundary between the intermediate pin and the lower pin between the upper and lower pins is a boundary line between the outer cylinder and the inner cylinder. In the pin cylinder lock that enables the inner cylinder to rotate when it coincides with the share line,
The intermediate pin interposed between the upper pin and the lower pin is, when locked, the upper portion of the intermediate pin substantially coincides with a share line that is a boundary line between the outer cylinder and the inner cylinder, and is used for unauthorized unlocking. When the turning force is applied to the inner cylinder by the tool, the upper end of the intermediate pin engages with the peripheral edge of the pin hole of the outer cylinder, and the intermediate pin and the lower pin cannot move to the pin hole of the outer cylinder. A pin cylinder lock characterized by being configured as follows. The contact portion between the upper portion of the intermediate pin and the lower portion of the upper pin is formed with an engagement recess and an engagement protrusion that engages with the engagement recess. The engagement recess and the engagement protrusion 7 is a fitting that allows the inner cylinder to be slightly rotated while maintaining the locked state in a state in which the engaging concave portion and the engaging convex portion are engaged with each other. Pin cylinder lock.

Images