JP4331564B2 - Locking device - Google Patents

Description

  The present invention belongs to the technical field of locks, and relates to a locking device excellent in crime prevention, stability, safety, simplicity of structure, durability, low cost, and ease of changing the unlocking operation conditions.

  Various locks are already available. Of these, simple padlocks are often unlocked (unlocked) illegally, and are therefore rarely used for crime prevention at critical points.

  On the other hand, the following non-patent document 1 discloses a dial lock and a dial-type wire lock. The dial lock, which is a variant of the padlock, is locked and unlocked with a dial instead of a key, and is convenient because it can be shared by each person by just asking for a few digits. Dial-type wire locks used for bicycle crime prevention, etc. are easy to use because they only lock or release the wire in a loop by dialing such as shifting the number of several digits or matching them.

  What can be said about conventional locks, including dial locks and dial-type wire locks, is that the number of parts is extremely large and the structure is complicated. Such locks inevitably increase material costs and increase the manufacturing process, leading to increased product costs. In addition, there are many moving parts such as dials. Due to the wear of these movable parts, the operability of the dial is not smooth, and breakdowns tend to occur. The more important point to point out is vulnerability in terms of strength. That is, a lock with low strength can be easily broken when picking.

  It is conceivable to increase the strength by increasing the size of the lock as the above countermeasure. This increase in size increases the strength of the lock. However, when the size of a lock composed of 20 or more parts is increased, not only the product design but also the manufacturing equipment must be fundamentally changed. While these burdens reduce manufacturers 'willingness to improve, the cost increase of large locks reduces users' willingness to purchase.

  The lock that is unlocked by dial operation cannot change the dial code (number of about 4 digits), so that the security system is not sufficient when it is leaked to the outside. In addition, when this type of lock is used for crime prevention in a building or the like, a new lock must be changed every time the user changes. This is uneconomical because the lock is changed in terms of confidentiality of the dial code.

In addition, when it is required to have durability that can withstand severe conditions such as use exposed to wind and rain or underwater or in the sea, conventional locks that are precisely assembled with many metal parts are It is almost difficult to meet such requirements.
Earth Studio, Key / Diamond Big Company (Sanyo Akasaka Building 3F, 3-5-2 Akasaka, Minato-ku, Tokyo) / October 4, 2003 Internet Search <URL: http://www.arukikata.co.jp /shop/list/key.html>

  As is apparent from the above, the following problems remain in conventional locks. One of them is lack of strength and lack of security and security. The other is the increased complexity of the structure and increased product cost due to the large number of parts. Another is that it is difficult to maintain operational stability for a long time. Another is that it is not suitable for use under harsh conditions.

  An object of the present invention is to solve these problems and provide a useful and useful locking device. In more detail, as a locking device for use in various fields, such as crime prevention, stability, safety, strength, conciseness of structure, durability, low cost, easy change of unlocking operation conditions, etc. It is to provide an excellent one.

  The locking device according to claim 1 of the present invention is characterized by the following problem solving means in order to achieve the intended purpose. That is, the locking device according to claim 1 includes a lock body having a locking bar, a lock receiving body having a locking hole, and a plurality of locking screw shafts. The locking rod is formed with a plurality of locking screw holes that intersect the axial direction of the locking rod and pass through the locking rod, and are arranged at intervals along the axial direction of the locking rod. A plurality of operation holes are formed in a part of the peripheral wall of the locking hole in the receiver so as to cross the axial direction of the lock receiver and pass through the peripheral wall and are arranged at intervals along the axial direction of the lock receiver. And when the locking bar and the locking hole are engaged with each other in the relative relationship between the lock body and the lock receiving body, and the locking bar and the locking hole are engaged with each other. Each lock screw hole and each operation hole are in one-to-one correspondence, and the lock body and lock The locking screw shaft, which is a male screw, and the locking screw hole, which is a female screw, make a pair in a relative relationship with the screw shaft, and the length of the locking screw shaft is equal to or less than the length of the locking screw hole. In addition, in the relative relationship between the lock receiver and the locking screw shaft, the portion excluding the outer end portion of the operation hole has an inner diameter capable of receiving the locking screw shaft, and the outer end portion of the operation hole is When the lock shaft of the lock body has an inner diameter smaller than the outer diameter of the lock screw shaft, and the lock rod of the lock body fits into the lock hole of the lock receiver for locking, A locking screw shaft is interposed between the locking screw hole and the operation hole that are in one-to-one correspondence, and each locking screw shaft is unlocked in each locking screw hole of the locking rod for unlocking. When locked, the locking bar of the lock body Characterized in that it is intended to escape from the locking hole in the receptacle.

  The locking device according to claim 2 of the present invention is characterized by the following problem solving means in order to achieve the intended purpose. That is, the lock device according to claim 2 includes a lock body having a lock rod, a lock receiver having a lock hole, and a plurality of locking screw shafts. The locking rod is formed with a plurality of locking screw holes that intersect the axial direction of the locking rod and pass through the locking rod, and are arranged at intervals along the axial direction of the locking rod. A plurality of operation holes are formed in a part of the peripheral wall of the locking hole in the receiver so as to cross the axial direction of the lock receiver and pass through the peripheral wall and are arranged at intervals along the axial direction of the lock receiver. And the inner wall surface of the locking hole in the lock receiver is formed with a plurality of lock holes facing the respective operation holes, and the relative relationship between the lock body and the lock receiver. The stop rod and the locking hole fit together to form an even pair, and the locking rod and the locking hole fit together The lock screw holes, the operation holes, and the lock holes are in one-to-one correspondence with each other, and the lock screw shaft and the female screw are male screws in the relative relationship between the lock body and the lock screw shaft. The locking screw hole is a pair, the length of the locking screw shaft is equal to or less than the length of the locking screw hole, and the relative relationship between the lock receiver and the locking screw shaft. The portion excluding the outer end of the operation hole has an inner diameter that can accept the locking screw shaft, and the outer end of the operation hole has an inner diameter smaller than the outer diameter of the locking screw shaft, And the lock hole has an inner diameter that can accept the screw shaft for locking, and the locking rod of the lock body fits into the locking hole of the lock receiving body for locking, and these are combined. Each one-to-one When the lock screw shaft is interposed between the lock screw hole and the lock hole, and when each lock screw shaft is stored in each lock screw hole of the locking rod for unlocking, The lock rod of the lock body is configured to escape from the lock hole of the lock receiver.

  According to a third aspect of the present invention, the lock device according to the second aspect is characterized in that the depths of the lock holes are different from each other.

  Since the lock device according to the present invention is composed of a lock body, a lock receiver, a plurality of locking screw shafts, etc., the number of parts is small, and in particular, there is a lock body having a locking bar and a locking hole. Since the lock receiver has a simple and robust structure, it is not brittle in strength. These therefore satisfy the mechanical strength, the simplicity of the structure, the durability and the low cost. Of course, if it is excellent in mechanical strength, safety that is not physically broken can be secured. In addition, when each component is made of an inferior material such as stainless steel, it does not corrode for a long time even in water or in the sea. This means that it can withstand long-term use under harsh conditions.

  In the locking device according to the present invention, when the locking rod of the lock body is fitted into the locking hole of the lock receiver and these are united, the locking screw hole and the operation hole that are in one-to-one correspondence A locking screw shaft is interposed. This is the locked state. Even if a force that causes the locking rod to escape from the locking hole acts in the locked state, the locking screw shaft interposed between the locking screw hole and the operation hole prevents this, so that the locking rod is not unlocked. Since this is locked by a plurality of locking screw shafts instead of one, the locked state is strong and stable. In other words, this multiple lock is one factor that provides a high level of crime prevention effect.

  In the locking device according to the present invention, when each locking screw shaft is housed in each locking screw hole of the locking rod, the locking rod of the locking body is allowed to escape from the locking hole of the lock receiving body. Can do. Based on this, it is unlocking to make the escape state. In order to bring a locked state into an unlocked state, each lock screw shaft must be rotated a predetermined number of times and placed in each lock screw hole, but only the parties know the number of times. The probability of reaching the above state is close to zero even if a stranger makes a rotation. Therefore, unlocking (unauthorized unlocking) by a person other than the parties is absolutely impossible. In other words, the extremely difficult unlocking by a person other than the parties is another factor that has a high crime prevention effect.

  The examples illustrated in the accompanying drawings as embodiments of the locking device according to the present invention are desirable for achieving the object of the invention and ensuring the effects of the invention, but these are only examples. is there. Therefore, the locking device according to the present invention is not limited to the embodiments described below.

  Example 1 of the locking device according to the present invention will be described with reference to FIGS.

  1 to 3, 11 is a lock body, 21 is a lock receiver, 41 a to 41 e are a plurality of locking screw shafts, 51 a to 51 e are adjustment elements, 61 and 62 are connecting pins, 71 is a chain, Reference numeral 81 denotes a screwdriver tool.

  The lock 11 is made of an inferior material having a high mechanical strength. As a typical example, the lock 11 is made of an inferior metal such as stainless steel, but may be made of a synthetic resin (including FRP) or a composite material of a metal and a synthetic resin. The lock body 11 has a base portion 12 and a locking rod 16 which are integrally formed with each other, and the locking rod 16 having a circular cross section protrudes from the distal end surface of the base portion 12. The base 12 has two connecting pieces 14 and 15 facing each other with the notch 13 interposed therebetween. The locking bar 16 is formed with a plurality of locking screw holes 17a to 17e that cross the axial direction of the locking bar 16 and pass through the locking bar 16. The locking screw holes 17 a to 17 e are arranged at equal intervals along the axial direction of the locking rod 16.

  The lock receiver 21 is also made of the same material as the lock body 11. A typical example is stainless steel. The lock receiver 21 has a base portion 22 and a cylindrical portion 26 that are integrated with each other, and the cylindrical portion 26 having a deformed cross section projects from the distal end surface of the base portion 22. The base 22 has two connecting pieces 24 and 25 that face each other with a notch 23 interposed therebetween. The inside of the cylindrical portion 26 is a locking hole 27 having one end opened, and a concave portion 28 for preventing rotation is formed on the distal end surface of the cylindrical portion 26. A plurality of operation holes 29 a to 29 e are formed in a partial peripheral wall of the locking hole 27 (a part of the cylindrical portion 26) so as to intersect the axial direction of the lock receiver 21 and penetrate the peripheral wall. The operation holes 29 a to 29 e are also screw holes similar to the locking screw holes 17 a to 17 e, and are arranged at equal intervals along the axial direction of the lock receiver 21. The operation holes 29a to 29e will be further described. Each operation hole 29a to 29e has a smaller hole diameter at the outer end than the other portions. In addition, a plurality of lock holes 30a to 30e facing the respective operation holes 29a to 29e are formed on the inner wall surface of the locking hole 27.

  As other components, the lock screw shafts 41a to 41e, the adjustment elements 51a to 51e, the connecting pins 61 and 62, the chain 71, etc. are mainly made of metal. In these cases, if there is a synthetic resin (including FRP) that is excellent in strength, a material of that kind may be adopted. The locking screw shafts 41a to 41e are paired with the locking screw holes 17a to 17e and the male and female screws. The lock screw shafts 41a to 41e are also paired with the operation holes 29a to 29e and the lock holes 30a to 30e in a male screw / female screw relationship. The length of the lock screw shafts 41a to 41e is equal to or less than the length of the lock screw holes 17a to 17e. Each of the end surfaces of the locking screw shafts 41a to 41e has a recessed tool hook portion 42 for hooking a tool. The adjustment elements 51a to 51e are the same as the screw threads 41a to 41e for locking as male threads, but part or all of these lengths are different. That is, the adjustment elements 51a to 51e are two or more types with respect to the length, and the lengths of the adjustment elements 51a to 51e are all different depending on circumstances. There is also a tool hooking portion 52 that is recessed for hooking a tool on each of the end faces of the adjustment elements 51a to 51e.

  Each of the locking screw shafts 41a to 41e is screwed into each of the locking screw holes 17a to 17e of the locking rod 16 as an aspect at the time of use, and is housed therein. Each of the adjustment elements 51a to 51e is screwed into the lock holes 30a to 30e of the cylindrical portion 26 and is housed therein. One end portion of the chain 71 is inserted into a notch 13 in the base portion 12 of the lock body 11, and the base portion 12 of the lock body 11 is connected via a pin 61 penetrating both the connecting pieces 14 and 15 and one end portion of the chain. Connected to The other end of the chain 71 is also inserted into the notch 23 in the base 22 of the lock receiver 21, and the lock receiver is received via a pin 62 penetrating both the connecting pieces 24 and 25 and the other end of the chain. 21 is connected to the base 22. Thereafter, the connecting pins 61 and 62 are fixed to the base portion 12 of the lock body 11 and the base portion 22 of the lock receiver 21 by welding. Therefore, the lock body 11 and the lock receiver 21 connected by the chain 71 cannot be separated.

  The screwdriver tool 81 can be said to be a key, and is composed of a well-known square wrench. Incidentally, when the tool hooking portion 42 of the locking screw shafts 41a to 41e and the tool hooking portion 52 of the adjusting elements 51a to 51e are hexagonal, the tool 81 is also composed of a hexagonal wrench. The tool 81 may be a ready-made product (commercial product).

  In the relative relationship between the lock body 11 and the lock receiver 21, the locking bar 16 and the locking hole 27 are fitted together to form a mating pair, which can be fitted closely together. At the final stage when the locking bar 16 is fitted into the locking hole 27, when the base portion 12 of the lock body 11 is aligned with the rotation-preventing recess 28 in the cylindrical body 26 of the lock receiver 21, each locking screw The holes 17a to 17e, the operation holes 29a to 29e, and the lock holes 30a to 30e are in one-to-one correspondence. This is because the concave portion 28 receives the distal end portion of the base portion 12 only when the distal end portion of the base portion 12 is held in a predetermined posture with respect to the concave portion 28 of the cylindrical body 26. Therefore, the distal end portion of the base portion 12 and the concave portion 28 of the cylindrical body 26 have an alignment function.

  The locking device of Example 1 is used as follows with reference to FIGS.

  When the lock body 11 and the lock receiver 21 are in the unlocked state as shown in FIG. 1, the lock screw shafts 41 a to 41 e are completely inserted into the lock screw holes 17 a to 17 e of the locking rod 16. It is paid. With the unlocked lock body 11, the lock rod 16 can be fitted into the lock hole 27 of the lock receiver 21. Therefore, in the first step of locking, the locking rod 16 is fitted into the locking hole 27, or the base 12 is matched with the recess 28 at the final stage of the fitting, so that the lock 11 and the lock receiver 21 Unite. With this combination, the lock screw holes 17a to 17e, the operation holes 29a to 29e, and the lock holes 30a to 30e are in one-to-one correspondence as shown in FIG. In the next step, each of the locking screw shafts 41 a to 41 e is operated using the tool 81. More specifically, the tool 81 is inserted into the locking screw hole 17a and hooked on the tool hooking portion 42 of the tip locking screw shaft 41a, and is turned and tightened until the locking screw shaft 41a collides with the adjusting element 51a. Include. The locking screw shaft 41a after colliding with the adjusting element 51a intervenes not only in the locking screw hole 17a but also in the locking hole 30a. Similarly, the locking screw shafts 41b to 41e are turned and tightened until they collide with the adjusting elements 51b to 51e, respectively. The lock screw shafts 41b to 41e after colliding with the adjusting elements 51b to 51e are also interposed between the lock screw holes 17b to 17e and the lock holes 30b to 30e. Thus, when locking is completed, the state shown in FIG. 2 is obtained. About this, even if any one of the locking screw shafts (41a to 41e) is interposed over the locking screw holes (17a to 17e) and the locking holes (30a to 30e), the locked state is brought about. Such locking is also possible for emergency locking or temporary simple locking.

  An example of the number of rotations of the locking screw shafts 41a to 41e when the locked state shown in FIG. 2 is obtained is as follows. The locking screw shaft 41a is "2.5 rotations", the locking screw shaft 41b is "1.5 rotations", the locking screw shaft 41c is "4.5 rotations", and the locking screw shaft 41d is "3.5 rotations". ”, The locking screw shaft 41e is“ 1.5 rotations ”. Only the parties know the operation rotation speed (tightening rotation speed) of each of the locking screw shafts 41a to 41e, and the outsiders and third parties are not known.

  When a force for separating the lock 11 and the lock receiver 21 is applied in the locked state of FIG. 2, that is, when a force for pulling the locking rod 16 from the locking hole 27 is applied, the locking screw holes 17a to 17e are used. And the lock screw shafts 41a to 41e interposed over the lock holes 30a to 30e cooperate to prevent this. Therefore, the locked state of the lock body 11 and the lock receiver 21 cannot be broken with the above-described pulling force.

  About the locked state of FIG. 2, as described above, the operation rotation speed of each of the locking screw shafts 41a to 41e is unknown to outsiders or third parties. Even if the operating rotational speed of each of the locking screw shafts 41a to 41e is determined, it takes a long time to operate them one by one repeatedly. There are even things that can't be broken. This is a high risk for the person who performs unauthorized unlocking, and is effective in preventing crimes from being abandoned or abandoned. Therefore, it is practically difficult to unlock the locked state of FIG.

  When the party unlocks the locked state of the lock body 11 and the lock receiver 21, the lock screw shafts 41a to 41e in the state of FIG. 2 may be rotated a predetermined number of times in the reverse direction. By doing so, the respective locking screw shafts 41a to 41e are completely accommodated in the respective locking screw holes 17a to 17e of the locking rod 16, and the state shown in FIG. It is only necessary to pull out from the locking hole 27. Thus, the unlocked state of FIG. 1 is obtained.

  When a person other than the party rotates one or more of the locking screw shafts 41a to 41e in the locked state, the screw shaft operation amount (reverse rotation speed) for unlocking is distorted. Therefore, even if the lock screw shafts 41a to 41e are operated as described above, they cannot be unlocked. In such a case, the locking screw shafts 41a to 41e are rotated until they collide with the adjusting elements 51a to 51e to return to the original locked state, and then unlocked. The inability to unlock by the predetermined operation here is also a notification (an unauthorized access notification) that someone has touched the lock device.

  The locking device according to the first embodiment is locked and unlocked as described above, and the lock body 11 and the lock receiver 21 which are the main components of the configuration are connected by a chain 71. As an example, when using this to lock or restrain an object, after the chain 71 is hung over the anchoring ring and the object installed on the ground, the lock body 11 and the lock receiver 21 are connected. What is necessary is just to combine and lock as mentioned above. As another example, the locking device of the present invention is wound around the screw portion of a motor boat or a small vessel to bring the lock body 11 and the lock receiver 21 into the locked state described above. In this case, it is used underwater or in the sea.

  About the locking device of Example 1, the effective length (axial direction) of the lock holes 30a-30e is changed by changing the length (dimension of an axial direction) of each adjustment element 51b-51e given to the lock holes 30a-30e, respectively. Effective dimension) can be changed. That is, this means that the operation rotation speed of each of the locking screw shafts 41a to 41e in locking and unlocking can be changed. If such changes are made regularly, it will become increasingly difficult for outsiders to see the unlocking operation conditions. Even when the owner or user of the lock device changes, it can be dealt with by changing the conditions, so that the inconvenience seen when replacing with a new lock device does not occur.

  A second embodiment of the locking device according to the present invention will be described with reference to FIG.

  The main body of the lock body 11 illustrated in FIG. 4 includes a locking bar 16 without the base 12. A knob 18 is attached to the surface (circumferential surface) of the locking bar 16 by screwing means or the like. With respect to other configurations, the lock body 11 is substantially the same as or similar to that of the first embodiment. The holding cylinder 72 for slidably holding the locking rod 16 is made of the same material as the lock body 11 and the lock receiver 21, and has a guide groove 73 that is long in the axial direction on the peripheral wall. A plurality of mounting seats 74 are provided on the outer wall surface of the holding cylinder 72. The locking bar 16 of the lock body 11 is inserted into the holding cylinder 72 and is held so that it can be inserted and removed from one end of the cylinder. The knob 18 is attached after the locking bar 16 is held in the holding cylinder 72.

  The main body portion of the lock receiver 21 illustrated in FIG. 4 also includes a cylindrical portion 26 without the base portion 22. In this case, a plurality of mounting seats 31 are provided on the outer wall surface of the cylindrical portion 26. Regarding other configurations, the lock receiver 21 is substantially the same as or similar to that of the first embodiment.

  The locking device of Example 2 illustrated in FIG. 4 is used as an internal lock in a building or the like. Specifically, on the inner surface of the sliding type sliding doors D1 and D2, the holding cylinder 72 holding the lock 11 is screwed to the inner surface of the frame on the closing side of the sliding door D1, and the closing side of the sliding door D2 The lock receiver 21 is screwed to the inner surface of the frame. In this attached state, the locking rod 16 of the lock body 11 and the locking hole 27 of the lock receiver 21 face each other on the same axis.

  Referring to FIG. 4, in the locking device of the second embodiment, when both sliding doors D <b> 1 and D <b> 2 are closed, the locking rod 16 in the holding cylinder 72 is protruded by a sliding operation to the locking hole 27 of the lock receiving body 21. It is to be inserted. As a result, the lock screw holes 17a to 17e, the operation holes 29a to 29e, and the lock holes 30a to 30e are in one-to-one correspondence, and as described above, the lock screw shafts 41a to 41e are adjusted. These are turned and tightened until they collide with the elements 51a to 51e. Since the locking screw shafts 41a to 41e that collide with the adjusting elements 51a to 51e are interposed between the locking screw holes 17a to 41e and the locking holes 30a to 30e, a predetermined locking state is obtained as described above. When the party unlocks this locked state, the lock screw shafts 41a to 41e are rotated in the reverse direction a predetermined number of times so that they are completely accommodated in the lock screw holes 17a to 17e of the locking rod 16, and thereafter Then, the locking bar 16 may be slid and returned from the locking hole 27 of the lock receiver 21.

  Examples of the lock device according to the present invention other than those described above include the following.

  In the embodiment in which the chain 71 of the lock body 11 and the chain 71 of the lock receiver 21 are separate bodies, the chain 71 on the lock body 11 side or the lock receiver 21 side is fixed to the anchoring place, and the other chain 71 is fixed. It is attached to the moving body (movable body). Therefore, the lock body 11 and the lock receiver 21 are locked as described above when the moving body is connected to the anchoring place.

  When each of the locking screw shafts 41a to 41e, each of the locking screw holes 17a to 41e, and each of the operation holes 29a to 29e, the locking holes 30a to 30e, etc. are made of a pair of male screws and female screws, a set “Right thread” and “Left thread” for multiple pairs of screws, such as “male thread / female thread” as “right thread” and another set of “male thread / female thread” as “left thread”. Both may be adopted. As an example in this case, the locking is as follows: lock screw shaft 41a = 2.5 turns right, lock screw shaft 41b = 1.5 turns left, lock screw shaft 41c = 4.5 turns right, lock screw shaft 41d = The rotation can be performed by 3.5 rotations left, and the lock screw shaft 41e = 1.5 rotations right, and unlocking can be performed by reverse rotation thereof. In such a combination of “right-handed screw” and “left-handed screw”, “right-handed screw” and “left-handed screw” do not need to be arranged regularly and alternately. For example, “left” “left” “right” “left” “ “Right thread” and “left thread” may be irregularly arranged like “right”.

  As one example of the omission, the adjustment elements 51a to 51e may be omitted. In this case, the lock holes 30a to 30e having different axial dimensions may be formed at the stage of processing the lock receiver 21. In the embodiment in which each operation hole 29a to 29e also serves as each lock hole 30a to 30e, when locking, the lock screw shafts 41a to 41e are interposed between the lock screw holes 17a to 41e and the operation holes 29a to 29e. Let In this case, adjustment elements 51a to 51e are interposed in the operation holes 29a to 29e. As a specific example, cylindrical adjustment elements 51a to 51e having female screws on the outer peripheral surface are interposed in the operation holes 29a to 29e, and a plurality of recesses having different depths are locked by the operation holes 29a to 29e. Create on the inner wall of hole 27. The base 12 of the lock body 11 and the base 22 of the lock receiver 21 may also be omitted. Such a thing is used, for example, embedded in the sliding doors D1 and D2.

  As one of the embodiments related to the change, the operation holes 29a to 29e and the lock holes 30a to 30e do not need to be female screws, and may be holes or holes without screw grooves. The locking bar 16 may be composed of a bar having a circular cross section (including an elliptical cross section) or a bar having a polygonal cross section. In this case, the locking hole 27 has a circular cross section (including an elliptical cross section) and a polygonal cross section in order to receive the locking rod 16. However, since there is a correspondence that the locking bar 16 is a square bar and the locking hole 27 is a regular octagonal hole, the cross-sectional shape of the locking bar 16 and the cross-sectional shape of the locking hole 27 may not be equal. Lock screw holes 17a to 41e, operation holes 29a to 29e, lock holes 30a to 30e, lock screw shafts 41a to 41e, adjustment elements 51a to 51e, etc. It's okay. The chain 71 may be a wire.

The features of the locking device according to the present invention are as follows (1) to (9).
(1) The initial operation for unlocking is simply turning a plurality of locking screw shafts by a predetermined number. However, since it is difficult for outsiders and third parties to decipher this, crime prevention (security reliability) is extremely high.
(2) It is easily revealed that an outsider or a third party has illegally operated the locking screw shaft. In addition, by knowing it, you can be vigilant in crime prevention.
(3) The convenience is high because existing inexpensive tools are the key. Even if a tool is attached to the lock device as a countermeasure against loss, there is no risk of crime prevention because unauthorized unlocking is difficult as described above. Even if a tool is lost, it can be easily refilled with a commercial product.
(4) The operating conditions for unlocking can be easily changed. The crime prevention effect increases more by carrying out it appropriately. Even when the operating subject such as the owner or the user of the lock device changes, this can be dealt with, and replacement with a new lock device becomes unnecessary. Therefore, even when the operation subject is changed, the economy can be maintained.
(5) The main operation for locking and unlocking is simply turning the locking screw shaft. Therefore, there is almost no room for malfunction or failure, and long-term stability can be obtained.
(6) Satisfy mechanical strength due to robust structure and high mechanical strength.
(7) Because of its robust structure, there is safety that cannot be physically broken.
(8) Since the structure is simple and the number of parts is small, it is possible to select high-grade materials that do not corrode underwater or in the sea. As a result, durability is enhanced and long-term use under severe conditions is possible.
(9) The low cost is satisfied because there are few parts and the structure is simple.

It is the perspective view of the unlocking state which showed one Example of this invention locking device. It is sectional drawing of the locking state which showed one Example of this invention locking device. It is sectional drawing in the middle of operation which showed one Example of this invention locking device. It is the front view of the unlocked state which showed the other Example of this invention locking device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Lock body 16 Locking rod 17a Lock screw hole 17b Lock screw hole 17c Lock screw hole 17d Lock screw hole 17e Lock screw hole 21 Lock receiving body 27 Lock hole 29a Operation hole 29b Operation hole 29c Operation hole 29d Operation hole 29e Operation hole 30a Operation hole 30b Operation hole 30c Operation hole 30d Operation hole 30e Operation hole 41a Lock screw shaft 41b Lock screw shaft 41c Lock screw shaft 41d Lock screw shaft 41e Lock screw shaft 51a Adjustment element 51b Adjustment Element 51c Adjustment element 51d Adjustment element 51e Adjustment element

Claims (3)

  It is provided with a lock body having a locking bar, a lock receiving body having a locking hole, and a plurality of locking screw shafts, and the locking bar of the lock body intersects with its axial direction. A plurality of locking screw holes penetrating the locking rod and arranged at intervals along the axial direction of the locking rod; and a partial peripheral wall of the locking hole in the lock receiver Is formed to have a plurality of operation holes that intersect the axial direction of the lock receiver and pass through the peripheral wall and are arranged at intervals along the axial direction of the lock receiver; and In the relative relationship with the receiver, the locking rod and the locking hole are fitted to form a mating pair, and when the locking rod and the locking hole are fitted, each screw hole for locking and each operation hole are The male screw is a one-to-one match and the relative relationship between the lock body and the screw shaft for locking. The lock screw shaft and female lock screw hole make a pair, and the length of the lock screw shaft is equal to or less than the length of the lock screw hole. The portion excluding the outer end of the operation hole in the relative relationship with the screw shaft has an inner diameter that can receive the lock screw shaft, and the outer end of the operation hole is smaller than the outer diameter of the lock screw shaft. A locking screw hole that has an inner diameter, and when the locking rod of the lock body is fitted into the locking hole of the lock receiving body for locking, and these are united, When the lock screw shaft is interposed between the operation holes, and when each lock screw shaft is placed in each lock screw hole of the lock rod for unlocking, the lock body is locked. The rod escapes from the locking hole of the lock receiver. Lock device, characterized in that.   It is provided with a lock body having a locking bar, a lock receiving body having a locking hole, and a plurality of locking screw shafts, and the locking bar of the lock body intersects with its axial direction. A plurality of locking screw holes penetrating the locking rod and arranged at intervals along the axial direction of the locking rod; and a partial peripheral wall of the locking hole in the lock receiver Has a plurality of operation holes arranged at intervals along the axial direction of the lock receiver, and intersects with the axial direction of the lock receiver. The inner wall surface of the stop hole has a plurality of lock holes facing the respective operation holes, and the locking bar and the locking hole are fitted in the relative relationship between the lock body and the lock receiving body. When the locking rod and the locking hole are fitted together, each locking screw hole, each operation hole and And the locking screw shaft as a male screw and the locking screw hole as a female screw make a pair in the relative relationship between the lock body and the locking screw shaft. In addition, the length of the lock screw shaft is equal to or less than the length of the lock screw hole, and the portion other than the outer end of the operation hole is locked in the relative relationship between the lock receiver and the lock screw shaft. Has an inner diameter capable of receiving the screw shaft, the outer end of the operation hole has an inner diameter smaller than the outer diameter of the lock screw shaft, and the lock hole receives the lock screw shaft. For locking that has an inner diameter that can be locked, and that when the locking rod of the lock body is fitted into the locking hole of the lock receiving body for locking, they are united one by one Screw holes and lock holes When the lock screw shaft is interposed, and when each lock screw shaft is placed in each lock screw hole of the lock rod for unlocking, the lock rod of the lock body is locked. A locking device that escapes from a locking hole of a body.   The locking device according to claim 2, wherein the depths of the lock holes are different from each other.

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