Grip piece holding mechanism for unlocking tool and unlocking tool

Abstract

To provide a grip piece holding mechanism for an unlocking tool and an unlocking tool that are widely applicable to a wide variety of doors. [Solution] The device comprises a cylindrical insertion frame 2 that can be inserted into a hole H formed in the door D, a holding mechanism 3 that is arranged at the tip side of the insertion frame 2 and holds an unlocking piece K that can unlock the thumb turn S of the door D, a flexible unlocking operation linear body 4 that operates the holding mechanism 3, and an operation handle 5 that is arranged at the base end side of the unlocking operation linear body 4.The unlocking operation linear body 4 can be freely advanced and retreated within the insertion frame 2 by operating the operation handle 5, and can also be freely rotated around itself, and the holding mechanism 3 can be freely switched between an attached state A in which it is attached to the tip of the insertion frame 2 and an attached retracted state B in which it is detached from the tip of the insertion frame 2 by moving the unlocking operation linear body 4 back and forth.

Description

[Technical Field]

[0001] The present invention relates to a grip piece holding mechanism for an unlocking tool and an unlocking tool. [Background technology]

[0002] If a resident leaves the front door and forgets, loses, or has the key stolen, they may find themselves unable to open the door. In such cases, they must contact a professional locksmith to have the door unlocked. To unlock the door, for example, a locksmith's tool, as shown in Patent Documents 1 and 2, is used. The locksmith inserts the locking piece through the hole in the upper door scope, inserts it into the room, engages the thumb turn, and rotates it to unlock. If there is no door scope but there is a mailbox opening, the locksmith's tool, as shown in Patent Document 3, inserts the locking piece through the lower mailbox opening, engages the thumb turn, and rotates it to unlock the door.

[0003] Such an unlocking tool includes an insertion frame that can be inserted into a peephole or a mailbox opening, an unlocking tab that is disposed at the tip of the insertion frame and can unlock the door thumb turn, a holding mechanism that holds the unlocking tab, an operating wire that operates the holding mechanism, and a handle that is used to hold and operate the operating wire. The insertion frame includes a base-end insertion frame disposed on the base end side, a tip-end insertion frame disposed on the tip end side and parallel to the base-end insertion frame, an intermediate insertion frame disposed between the base-end insertion frame portion and the tip-end insertion frame portion and whose length is flexible, a base-end curved connecting portion that connects the base-end insertion frame portion and the intermediate insertion frame portion, and a tip-end curved connecting portion that connects the tip-end insertion frame portion and the intermediate insertion frame portion. The tip-end insertion frame portion, the tip-end curved connecting portion, the intermediate insertion frame portion, the base-end curved connecting portion, and the base-end insertion frame portion are inserted into the peephole or the mailbox opening in this order, and a predetermined operation is performed to unlock the door. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-183674 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-236355 [Patent Document 3] Japanese Patent Publication No. 2022-083133 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the base curved connection portion passes through the peephole or mailbox opening, the tip of the distal insertion frame may hit the door, preventing the insertion frame from being inserted any further. This may be due to a narrow range of movement of the insertion frame in the peephole or mailbox opening (for example, a small difference between the dimensions of the opening and the dimensions of the insertion frame, a thick door, or a small radius of curvature of the base curved connection portion), or the long length of the distal insertion frame. This narrows the compatibility range of the unlocking tool with a wide variety of doors.

[0006] In addition, in doors with two cylinder locks, after first engaging and rotating one of the thumbturns with the release tab, even if you try to move the retention mechanism that holds the release tab away from the thumbturn, you may find that the release tab cannot be removed from the thumbturn. This is thought to be due to the narrow range of movement of the insertion frame in the door scope hole or mailbox opening, as well as the extremely strong engagement force between the thumbturn and the release tab.

[0007] SUMMARY OF THE INVENTION In view of the above circumstances, the present invention aims to provide a gripping piece holding mechanism for an unlocking tool and an unlocking tool that are compatible with a wide range of doors. [Means for solving the problem]

[0008] The gripping piece holding mechanism for an unlocking tool of the present invention comprises an insertion frame that can be inserted into a hole formed in a door, a holding mechanism that is arranged on the tip side of the insertion frame and holds an unlocking piece that can unlock the thumb turn of the door, a flexible unlocking operation linear body that is arranged along the insertion frame and operates the holding mechanism, and an operating handle that is arranged on the base end side of the unlocking operation linear body, wherein the unlocking operation linear body can be moved forward and backward within the insertion frame by operating the operating handle and can also be rotated around itself, and the holding mechanism can be switched between an attached state attached to the tip of the insertion frame and an attached and retracted state detached from the tip of the insertion frame by moving the unlocking operation linear body forward and backward.

[0009] The holding mechanism includes an unlocking piece holding member to which the unlocking piece is detachably attached, and the insertion frame includes a storage portion provided at the tip opening and a storage portion provided at the tip opening closer to the base end than the storage portion. and a bearing or ring-shaped spacer member that can abut against the holding mechanism. and the unlocking piece holding member is preferably biased by a magnet in the direction of the attached state.

[0010] It is preferable that the holding mechanism includes an unlocking piece holding member to which the unlocking piece can be attached and detached, and that the insertion frame includes a seating portion provided on the end face of the tip opening on which the unlocking piece holding member can be seated, and a magnet that biases the unlocking piece holding member in the direction of the attached state.

[0011] The holding mechanism preferably includes an unlocking piece-side magnet provided on the unlocking piece holding member, and a frame-side magnet provided on the distal end side of the insertion frame closer to the base end than the housing portion. The bearing or the ring-shaped spacer member is provided between the unlocking piece magnet and the frame magnet. It is preferable.

[0012] It is preferable that the insertion frame comprises a base-end insertion frame portion arranged on the base-end side, a tip-end insertion frame portion arranged on the tip-end side, and an intermediate insertion frame portion arranged between the base-end insertion frame portion and the tip-end insertion frame portion and whose length is flexible.

[0013] The insertion frame is flexible and has an extension / retraction control linear body arranged along the insertion frame, and the extension / retraction control linear body can be switched between an allowance state in which the intermediate insertion frame portion is allowed to extend and retract as the unlocking operation linear body advances, and a restriction state in which the intermediate insertion frame portion is restricted from extending and retracting as the unlocking operation linear body advances.When the extension / retraction control linear body is in the restriction state, the advancement of the unlocking operation linear body switches the holding mechanism in the attached state to the attached retracted state, and the retraction of the unlocking operation linear body switches the holding mechanism in the attached retracted state to the attached state.

[0014] It is preferable that a camera is provided on the tip insertion frame portion, and the expansion control linear body also serves as a video signal line connected to the camera.

[0015] The unlocking tool of the present invention is characterized by comprising the above-described gripping piece holding mechanism for an unlocking tool and the unlocking piece. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a grip piece holding mechanism for an unlocking tool and an unlocking tool that are compatible with a wide range of doors. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is an overall view of a grip piece holding mechanism for an unlocking tool according to a first embodiment of the present invention. [Figure 2] Figure 2A is a vertical cross-sectional view showing an operating handle for handling the unlocking operation linear body according to the first embodiment, and Figure 2B is a vertical cross-sectional view showing an insertion frame operating handle for handling the insertion frame. [Figure 3] FIG. 3 relates to the first embodiment and is a diagram showing the shape of an insertion frame and an unlocking operation linear body having a holding mechanism at its tip, separated and arranged side by side. [Figure 4]Figure 4A relates to the first embodiment and is a cross-sectional view showing the sliding structure of the intermediate insertion frame part of the unlocking operation linear body made of square pipe material, and Figure 4B is a cross-sectional view showing the sliding structure of the intermediate insertion frame part made of other than square pipe material. [Figure 5] FIG. 5A is a cross-sectional view showing an attached state in which the holding mechanism is housed in the tip opening of the insertion frame according to the first embodiment, and FIG. 5B is a cross-sectional view showing an attached retracted state in which the holding mechanism is displaced in the direction of extension of the tip of the insertion frame. [Figure 6] FIG. 6A is a cross-sectional view showing a mounted state of the holding mechanism according to a modified example, and FIG. 6B is a cross-sectional view showing a mounted and retracted state. [Figure 7] Figures 7(A)-(F) are three-dimensional diagrams showing the thumb turns of locks from various manufacturers. [Figure 8] FIG. 8 is an overall view of a grip piece holding mechanism for an unlocking tool according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A gripping piece holding mechanism for an unlocking tool according to an embodiment of the present invention will now be described with reference to the drawings.

[0019] [First embodiment] As shown in FIG. 1 , the unlocking tool gripping piece holding mechanism 1 according to this embodiment includes a cylindrical insertion frame 2 that can be inserted into a hole H formed in a door D; a holding mechanism 3 that is disposed at the distal end of the insertion frame 2 and holds an unlocking piece K capable of unlocking a thumb turn S of the door D; a flexible unlocking linear body 4 that is inserted into the insertion frame 2 and operates the holding mechanism 3; an operating handle 5 that is disposed at the proximal end of the unlocking linear body 4; and a grip 6 that is disposed at the proximal end of the insertion frame 2. The unlocking linear body 4 can be moved back and forth within the insertion frame 2 and can also rotate about itself by operating the operating handle 5. To unlock the door, an unlocking tool is completed by attaching an unlocking piece K that fits the thumb turn S to the holding mechanism 3. The unlocking piece K is then inserted into the hole H with the unlocking piece K facing the thumb turn S and engaging it. Next, turning the operating handle 5 rotates the unlocking linear body 4. As a result, the thumb turn S engaged with the unlocking piece K can be turned.

[0020] The hole H formed in the door D is an insertion hole for a peephole formed above the lock (cylinder lock). By removing the peephole from the door D, the insertion frame 2 can be inserted into the insertion hole. The insertion frame 2, the holding mechanism 3, and the unlocking operation linear body 4 will be described later.

[0021] (Operating handle) As shown in FIG. 2A, the operating handle 5 is used to hold and operate the unlocking linear member 4 and includes a cylindrical handle body 5a, a disc-shaped disc body 5b located near the handle body 5a, and a bolt 5b1 connecting the handle body 5a and the disc body 5b. The handle body 5a has a through-hole (unnumbered) extending axially from its top surface to its bottom surface, and an insertion hole 5a1 penetrating the side of the handle body 5a and through which the unlocking linear member 4 is inserted. A female thread is formed in the through-hole. The disc body 5b is also disc-shaped and is disposed on the top surface and bottom surface of the handle body 5a. The bolt 5b1 extends from each of the disc bodies 5b toward the top surface or bottom surface of the handle body 5a. The bolt 5b1 can be threaded into the through-hole (unnumbered) of the handle body 5a. Therefore, by screwing the bolts 5b1 into the through-hole of the handle body 5a from both sides, the unlocking operation linear body 4 inserted into the insertion hole 5a1 can be clamped from both sides. This makes it possible to move the unlocking operation linear body 4 forward and backward in the insertion frame 2, as well as to twist and rotate the unlocking operation linear body 4.

[0022] (grip) 2B, the grip 6 is for holding and operating the insertion frame 2, and includes a U-shaped frame 6a that engages across the base end (base-end insertion frame portion 2a) of the insertion frame 2, a pressing member 6b that presses the base end of the insertion frame 2 against the U-shaped frame 6a, a screw 6c that tightens and fixes the U-shaped frame 6a and the pressing member 6b, a bolt 6d that protrudes from the pressing member 6b, and a rod-shaped handle 6e that screws into a bolt hole (no reference number) for the bolt 6d. By holding the rod-shaped handle 6e with the grip 6, the insertion frame 2 can be inserted into the hole H formed in the door D and the insertion frame 2 can be smoothly guided until the unlocking piece K engages with the thumb turn S.

[0023] (insertion frame) As shown in Figures 1 and 3, the insert frame 2 comprises a proximal insert frame 2a arranged on the proximal side, a distal insert frame 2b arranged on the distal side, and an intermediate insert frame 2c arranged between the proximal insert frame 2a and the distal insert frame 2b and whose length is flexible. The proximal insert frame 2a extends in a first direction. The intermediate insert frame 2c extends in a second direction perpendicular to the first direction. The distal insert frame 2b extends in the first direction. It is preferable that the distal insert frame 2b be parallel to the proximal insert frame 2a. When the intermediate insert frame 2c is used as a reference, the length to the proximal end of the proximal insert frame 2a is longer than the length to the distal end of the distal insert frame 2b.

[0024] When the tip insertion frame portion 2b is first inserted into the hole H formed in the door D and then inserted up to the middle of the base insertion frame portion 2a (Figure 1), the tip from the middle of the base insertion frame portion 2a extends in a direction away from the door D toward the interior space of the room, and the tip from the base end of the tip insertion frame portion 2b extends in a direction toward the thumb turn S.

[0025] When the distal insertion frame portion 2b is parallel to the proximal insertion frame portion 2a and the intermediate insertion frame portion 2c is perpendicular to the proximal insertion frame portion 2a, rotation of the proximal insertion frame portion 2a about its axis allows the distal insertion frame portion 2b to rotate about the axis of the proximal insertion frame portion 2a. Furthermore, extension and contraction of the intermediate insertion frame portion 2c allows the distal insertion frame portion 2b to move radially around the axis of the proximal insertion frame portion 2a. This makes it easy to align the unlocking piece K held by the holding mechanism 3 with the thumb turn S.

[0026] The proximal insertion frame 2a is a metal cylindrical body. From the proximal end side, the proximal insertion frame 2a has a straight section 2a1, a curved section 2a2 that is integrally connected to the straight section 2a1, and a connecting section 2a3 that is integrally connected to the curved section 2a2 and has a male thread formed on its outer surface. The distal insertion frame 2b is also a metal cylindrical body. From the distal end side, the proximal insertion frame 2a has a straight section 2b1, a curved section 2b2 that is integrally connected to the straight section 2b1, and a connecting section 2b3 that is integrally connected to the curved section 2b2 and has a male thread formed on its outer surface.

[0027] 4A, the intermediate insertion frame section 2c is made up of a square pipe material 2c1, which is a small-diameter metal square tube that is threadedly connected to the connecting section 2a3 of the base-end insertion frame section 2a, and a square pipe material 2c2, which is a large-diameter metal square tube that is threadedly connected to the connecting section 2b3 of the tip insertion frame section 2b. The two square pipe materials 2c1 and 2c2 fit together slidably, so that their lengths can be freely extended or retracted, but their relative rotational movement around their own axes is restricted.

[0028] The square pipe material 2c1 of the intermediate insertion frame portion 2c is connected to the base-end insertion frame portion 2a, and the square pipe material 2c2 of the intermediate insertion frame portion 2c is connected to the tip-end insertion frame portion 2b. This allows the base-end insertion frame portion 2a, the intermediate insertion frame portion 2c, and the tip-end insertion frame portion 2b to be disassembled. Furthermore, the intermediate insertion frame portion 2c can be replaced with one of a different length.

[0029] When inserting the insert frame 2 into the hole H formed in the door D, the base end insert frame portion 2a is removed and the tip end insert frame portion 2b is inserted, and before the tip end insert frame portion 2b comes out of the hole H, the base end insert frame portion 2a is assembled to the tip end insert frame portion 2b and the insertion can be continued.

[0030] Because the intermediate insertion frame portion 2c is extendable, it can accommodate different distances between the lock on the door D and the peephole. The intermediate insertion frame portion 2c can be extended by advancing the unlocking operation linear body 4 within the insertion frame 2. The intermediate insertion frame portion 2c can be contracted by retracting the unlocking operation linear body 4 within the insertion frame 2. This allows the distance between the base end insertion frame portion 2a and the tip end insertion frame portion 2b to be adjusted.

[0031] The intermediate insertion frame portion 2c is not limited to the sliding structure of two square pipe members shown in FIG. 4A, but may be configured as a pipe formed by combining a channel member having a narrow channel groove with a channel member having a wide channel groove with the grooves facing each other, as shown in FIG. 4B, and further provided with a slide guide that prevents the two channel members from coming loose by engaging longitudinally extending concave and convex strips on the mating surfaces between both outer surfaces of the inner channel member and both inner surfaces of the outer channel member.

[0032] The insertion frame 2 may be made of plastic instead of metal.

[0033] 3 and 4A show a configuration in which the insertion frame 2 is cylindrical and the unlocking operation linear body 4 is inserted therethrough, but the insertion frame 2 may be rod-shaped instead of pipe-shaped except for the tip portion that houses the retention mechanism 3. In this case, rings may be attached to the insertion frame 2 at required intervals to allow the unlocking operation linear body 4 to pass through so that the unlocking operation linear body 4 is guided along the insertion frame 2.

[0034] (Unlocking operation linear body) The unlocking operation linear body 4 is flexible and is preferably a braided wire or a tightly wound coil wire. When the operating handle 5 is operated, the unlocking operation linear body 4 is twisted at its base end, allowing it to rotate freely around itself. This allows the twisting rotation to be transmitted to the tip of the unlocking operation linear body 4, allowing the unlocking piece K held by the holding mechanism 3 to rotate the thumb turn S. Furthermore, by operating the operating handle 5, the unlocking operation linear body 4 is able to move back and forth within the insert frame 2. The forward and backward movement of the unlocking operation linear body 4 within the insert frame 2 allows the intermediate insert frame portion 2c to expand and contract.

[0035] The connection structure between the tip of the unlocking operation linear body 4 and the holding mechanism 3 may be any appropriate configuration as long as the twisting rotation transmitted to the tip of the unlocking operation linear body 4 by twisting the base end of the unlocking operation linear body 4 is transmitted integrally to the holding mechanism 3.

[0036] (holding mechanism) For example, in this embodiment, as shown in FIG. 5A, the retaining mechanism 3 includes a ring-shaped unlocking piece retaining member 3a, a ring-shaped unlocking piece magnet 3b integrally fixed to the base end of the unlocking piece retaining member 3a, and a fastening ring 3c fixed to the unlocking piece retaining member 3a. The unlocking operation linear body 4 passes through the hollow portion of the unlocking piece magnet 3b and the hollow portion of the unlocking piece retaining member 3a. The tip of the unlocking operation linear body 4 is fixed to the fastening ring 3c. There are no particular limitations on the method for fastening the tip of the unlocking operation linear body 4 to the fastening ring 3c, and adhesive or soldering may be used. With this integral connection structure, when a twisting rotation is applied to the base end of the unlocking operation linear body 4, the twisting rotation is transmitted to the retaining mechanism 3 attached to the tip of the unlocking operation linear body 4, and the unlocking piece K held by the retaining mechanism 3 can rotate to unlock the thumb turn S.

[0037] (retention mechanism housing) The retention mechanism accommodating section 7 includes a taper 7a provided on the edge of the distal opening of the distal insertion frame section 2b, a distal tubular section 7b provided within the distal opening of the distal insertion frame section 2b for accommodating the retention mechanism 3, a bearing 7c provided at the proximal end of the distal tubular section 7b against which the retention mechanism 3 abuts, and a frame-side magnet 7d provided proximally of the bearing 7c. In the mounted state A (FIG. 5B) in which the retention mechanism 3 is accommodated in the distal tubular section 7b, the retention mechanism 3 is urged toward the proximal end by the magnetic force between the unlocking piece magnet 3b and the frame-side magnet 7d. In the mounted state A (FIG. 5B), the bearing 7c is located between the unlocking piece magnet 3b and the frame-side magnet 7d. Therefore, even when the unlocking piece magnet 3b and the frame-side magnet 7d abut against the bearing 7c with a strong force, the retention mechanism 3 can be smoothly rotated by the twisting rotation of the unlocking operation linear body 4.

[0038] At least one of the unlocking piece magnet 3b and the frame-side magnet 7d may be provided. Alternatively, one of the unlocking piece magnet 3b and the frame-side magnet 7d may be a magnetic body instead of a magnet. That is, when only the unlocking piece magnet 3b is used, a magnetic body is provided at the position of the frame-side magnet 7d. When only the frame-side magnet 7d is used, a magnetic body is provided at the base end of the unlocking piece holding mechanism 3.

[0039] In order for the twisting rotation of the unlocking operation linear body 4 to be transmitted to the holding mechanism 3 and for the holding mechanism 3 to rotate smoothly, providing a bearing or ring-shaped spacer between the unlocking half magnet 3b and the frame side magnet 7d prevents the magnets from coming into close contact with each other, allowing for smooth rotation of the holding mechanism 3. A bearing may be used when the attractive force between the magnets is strong, and a spacer may be provided when the attractive force between the magnets is weak. Furthermore, if the attractive force between the magnets is even weaker, the spacer may be omitted and the magnets may be placed in close contact with each other.

[0040] The connection structure between the tip of the holding mechanism 3 and the base end K1 of the unlocking piece K may be any appropriate configuration as long as it allows for a detachable connection and allows twisting rotation to be transmitted integrally from the holding mechanism 3 to the unlocking piece K.

[0041] Next, a method of using the grip piece holding mechanism 1 for an unlocking tool will be described.

[0042] First, a predetermined unlocking piece K is attached to the holding mechanism 3. This places the unlocking piece K at the tip of the insertion frame 2, creating an unlocking tool equipped with the unlocking tool grip piece holding mechanism 1 and the unlocking piece K. After that, the peephole is removed from the door D. Next, the insertion frame 2 is inserted tip-first into the hole H, i.e., the insertion hole of the peephole.

[0043] The base end insertion frame portion 2a is twisted in the hole H, and the intermediate insertion frame portion 2c is extended or retracted, so that the unlocking piece K faces the thumb turn S of the door D. When the unlocking piece K faces the thumb turn S of the door D, the base end insertion frame portion 2a is pulled in the hole H, engaging the unlocking piece K with the thumb turn S. After that, by twisting and rotating the unlocking operation linear body 4 using the operating handle 5, the unlocking piece K held by the holding mechanism 3 can be rotated to unlock the thumb turn S.

[0044] Here, it is further preferable that the gripping piece holding mechanism 1 for the unlocking tool can be freely switched between an attached state A (see Figure 5A) in which it is attached to the tip of the insertion frame 2 and an attached and retracted state B (see Figure 5B) in which it is detached from the tip of the insertion frame 2 by moving the unlocking operation linear body 4 back and forth within the insertion frame 2.

[0045] In the mounted state A (Fig. 5A), when the unlocking operation linear body 4 advances relative to the insertion frame 2, the holding mechanism 3 is pushed out from the tip opening of the insertion frame 2, resulting in the mounted retracted state B (Fig. 5B). In the mounted retracted state B, the base end of the unlocking piece holding member 3a is connected to the unlocking operation linear body 4 that is inserted through the holding mechanism 3, so it will not fall off.

[0046] When the unlocking piece K can be released from the thumb turn S, the unlocking operation linear body 4 is pulled in the direction of retreating relative to the insertion frame 2, and the retaining mechanism 3 is accommodated within the tip tubular portion 7b of the insertion frame 2, returning to the attached state A.

[0047] 6A is a cross-sectional view showing an attached state A of the holding mechanism 3 according to a modified example, and FIG. 6B is a cross-sectional view showing an attached and retracted state B. In this modified example, the holding mechanism 3 is in the attached state A, with the center of the attached state A aligned with the center of the insertion frame 2 and seated on the tip surface of the insertion frame 2. Then, as the unlocking operation linear body 4 advances, the holding mechanism 3A comes off the tip surface of the insertion frame 2 and falls obliquely downward, which is the attached and retracted state B. In the attached and retracted state B, when the base end of the unlocking operation linear body 4 is pulled so as to retreat relative to the insertion frame 2, the holding mechanism 3 can be returned to the attached state A, in which it is seated on the tip surface of the insertion frame 2.

[0048] In the above embodiment, the base end insertion frame portion 2a is twisted in the hole H and the intermediate insertion frame portion 2c is extended or retracted so that the unlocking piece K faces the thumb turn S of the door D, but the present invention is not limited to this. For example, the intermediate insertion frame portion 2c may be appropriately selected so that the distance between the base end insertion frame portion 2a and the tip end insertion frame portion 2b matches the distance between the hole H formed in the door D and the thumb turn S. In this case, only the base end insertion frame portion 2a is twisted in the hole H so that the unlocking piece K faces the thumb turn S of the door D, and the intermediate insertion frame portion 2c does not need to be extended or retracted.

[0049] Figures 7(A)-(F) show the thumbturns S of locks (cylinder locks) from various manufacturers. Due to differences in the standards of each manufacturer, the thumbturns S vary in size (thickness and width), shape, eccentricity, unlocking action, and locking mechanism. For this reason, when unlocking, it is necessary to select an unlocking piece K that is compatible with the door's thumbturn S. The selected unlocking piece K is separably connected to the unlocking piece holding member 3a at the tip of the holding mechanism 3 described above, and is fixedly connected so that it cannot rotate relative to the unlocking piece holding member 3a.

[0050] As shown in FIG. 5A, the selected unlocking piece K includes, for example, a base end K1 fixedly connected to the unlocking piece holding member 3a of the holding mechanism 3 so as not to rotate relative to the unlocking piece, and a pair of opposing clamping claws K2 extending from the base end K1. It may also include a pair of opposing enclosing claws K3 that are 90 degrees apart from the clamping claws K2. The shape and layout of the clamping claws K2 and the enclosing claws K3 may vary depending on the thumb turn S. It is preferable that the base end K1 have a common structure regardless of the manufacturer. For example, the unlocking piece holding member 3a at the tip of the holding mechanism 3 and the base end K1 of the unlocking piece K may each be circular, and may be connected by a pin, key, screw, or zipper.

[0051] In this embodiment, the unlocking piece K has a gap between the pair of clamping claws K2 that corresponds to the thickness direction of the thumb turn S, and a gap between the pair of surrounding claws K3 that corresponds to the width direction of the thumb turn S. When the base end of the insertion frame 2 is held outside the door and the tip of the insertion frame 2 is moved toward the door D, the pair of clamping claws K2 are pushed open by the thumb turn S, and as the thumb turn S enters completely between the claws, they close between the claws and clamp the thumb turn S against the wide surface. At the same time, the pair of surrounding claws K3 preferably surround the open portions on both sides of the gap between the pair of clamping claws K2, and abut against the thumb turn S to prevent it from leaning out to one side. When the pair of clamping claws K2 and the pair of surrounding claws K3 surround the thumb turn S, holding the operating handle 5 and applying a twisting rotation to the base end of the unlocking operation linear body 4 transmits this twisting rotation to the twisting rotation holding mechanism 3 and then to the unlocking piece K, allowing the thumb turn S to rotate 90 degrees to the unlocked state.

[0052] 1, the grip piece holding mechanism 1 for an unlocking tool preferably includes an expansion-controlling linear body 8. The distal end of the expansion-controlling linear body 8 is fixed to the distal insertion frame portion 2b, the proximal end is arranged along the proximal insertion frame portion 2a, and the middle portion is fixed to the square pipe material 2c2 of the intermediate insertion frame portion 2c.

[0053] When the extension / retraction control linear body 8 and the base-end insertion frame portion 2a are fixed to each other, both ends of the extension / retraction control linear body 8 are fixed, restricting the extension / retraction movement of the intermediate insertion frame portion 2c. As a result, when the base end of the unlocking operation linear body 4 is advanced relative to the insertion frame 2, the holding mechanism 3 comes off the tip of the insertion frame 2.

[0054] When the fixation between the extension / contraction control linear body 8 and the base-end insertion frame portion 2a is released, the base end of the extension / contraction control linear body 8 becomes a free end, and the restriction on the extension / contraction movement of the intermediate insertion frame portion 2c is released. When the base end of the unlocking operation linear body 4 is advanced relative to the insertion frame 2, the holding mechanism 3 does not come off the tip of the insertion frame 2, and the intermediate insertion frame portion 2c extends.

[0055] In this case, the configuration may be such that when the mark attached to the base end of the unlocking operation linear body 4 matches the base end of the insertion frame 2, the distance between the base end insertion frame portion 2a and the tip insertion frame portion 2b can be recognized as matching the distance between the hole H formed in the door D and the thumb turn S.

[0056] Furthermore, the unlocking tool grip piece holding mechanism 1 may include a camera 9 attached to the outer surface of the distal end of the distal insert frame portion 2b of the insert frame 2, and a video signal line 8 wired along the insert frame 2 and transmitting the image from the camera 9 to a video monitor M (which may be a PC, handheld terminal, or smartphone) provided on the proximal end of the insert frame 2. This allows the proximal end of the insert frame 2 to be operated while watching the video monitor M, thereby creating a state in which the unlocking piece K faces the thumb turn S. Note that, in FIG. 1, a wire fixing device 10 and a wire guide ring 11 may also be provided. The wire fixing device 10 fixes the video signal line 8 to the insert frame 2. The wire guide ring 11 is fixed to the insert frame 2. By passing the video signal line 8 through the wire guide ring 11, the video signal line 8 can be maintained along the insert frame 2.

[0057] In the assembled insert frame 2 shown in FIG. 1, the base-end insert frame portion 2a is longer than the tip-end insert frame portion 2b, so it may be difficult to pass the tip-end insert frame portion 2b through the hole H provided in the door D. The square pipe material 2c1 of the intermediate insert frame portion 2c is removed from the square pipe material 2c2. Next, the retaining mechanism 3 that holds the unlocking piece K is passed through the hole H first, and the square pipe material 2c1 can be inserted into the square pipe material 2c2 with the square pipe material 2c2 passing through the hole H. This allows the base-end insert frame portion 2a to be passed through the hole H.

[0058] [Second embodiment] FIG. 8 shows a grip piece holding mechanism 1A for an unlocking tool that unlocks a thumb turn S through a mailbox opening H' on a door D. The grip piece holding mechanism 1A for an unlocking tool differs from the grip piece holding mechanism 1 for an unlocking tool of the first embodiment in that the mailbox MB opening H' is located lower than the thumb turn S and that the mailbox MB has vertically offset paths H' leading to the mailbox MB's insertion and removal openings. For this reason, the base-end insertion frame 2a of the insert frame 2A of this embodiment is additionally provided with a horizontal straight portion 2c1, a vertical straight portion 2c4, and a curved portion 2a5 that curves three times to connect the two straight portions. The rest of the configuration is the same as that of the grip piece holding mechanism 1 for an unlocking tool of the first embodiment, so a description thereof will be omitted.

[0059] The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0060] 1, 1A Grab piece holding mechanism for unlocking tools 2 Insertion Frame 2a Proximal insertion frame 2a1 Straight section 2a2 curved section 2a3 connection 2b Tip insertion frame 2b1 Straight section 2b2 Curved section 2b3 Connection 2c Intermediate insertion frame part 2c1, 2c2 square pipe material 3, 3A retention mechanism 3a Unlocking piece holding member 3b Unlocking magnet on one side 3c Clamping ring 4 Unlocking operation wire 5 Operating handle 5a Handle body 5b Disk body 5b1 Bolt 6 Insertion frame operating handle 6a U-shaped frame 6b Pressing member 6c Screw 6d bolt 6e Rod-shaped handle 7 Retention mechanism housing 7a Tapered 7b Tip cylindrical part of insertion frame 7c bearing 7d Frame side magnet 8 Video signal line (also used as expansion / contraction control line) 9 Camera D-door H hole H' mailbox opening K unlocking piece K1 proximal end K2 clamping claw K3 Encircling Claw M Video Monitor S thumb turn

Claims

1. an insertion frame that can be inserted into a hole formed in the door; a holding mechanism that is disposed on the tip side of the insertion frame and that holds an unlocking piece that can unlock the thumb turn of the door; a flexible unlocking operation linear body that is arranged along the insertion frame and operates the holding mechanism; an operating handle disposed on the base end side of the unlocking operation linear body, The unlocking operation linear body can move back and forth within the insertion frame by operating the operation handle, and can also rotate about itself. The gripping piece holding mechanism for an unlocking tool is characterized in that the holding mechanism can be freely switched between an attached state in which it is attached to the tip of the insertion frame and an attached, retracted state in which it is detached from the tip of the insertion frame by moving the unlocking operation linear body forward and backward.

2. The holding mechanism includes: The unlocking piece is provided with a detachable unlocking piece holding member, The insertion frame is a storage section provided at the tip opening; a bearing or a ring-shaped spacer member that is provided at the distal end opening on the proximal side of the housing portion and that can abut against the holding mechanism, 2. The mechanism for holding a gripping piece for an unlocking tool according to claim 1, wherein the unlocking piece holding member is biased by a magnet in a direction toward the attached state.

3. The holding mechanism includes: The unlocking piece is provided with a detachable unlocking piece holding member, The insertion frame is a seating portion provided on the end surface of the tip opening on which the unlocking piece holding member can be seated; a magnet that biases the unlocking piece holding member in the direction of the attached state; 2. The gripping piece holding mechanism for an unlocking tool according to claim 1, further comprising:

4. The holding mechanism includes: An unlocking piece side magnet provided on the unlocking piece holding member; a frame-side magnet provided on the distal end side of the insertion frame closer to the proximal end than the housing portion; 3. The gripping piece holding mechanism for an unlocking tool according to claim 2, further comprising:

5. A gripping piece holding mechanism for an unlocking tool as described in Claim 4, characterized in that the bearing or the ring-shaped spacer member is arranged between the unlocking piece side magnet and the frame side magnet.

6. The insertion frame is a proximal end insertion frame portion disposed on the proximal end side; a tip insertion frame portion disposed on the tip side; A gripping piece holding mechanism for an unlocking tool as described in any one of claims 1 to 5, characterized in that it is provided with an intermediate insertion frame portion arranged between the base end insertion frame portion and the tip end insertion frame portion, and whose length is flexible.

7. The insertion frame is a flexible expansion / contraction control linear body arranged along the insertion frame; The extension / contraction control linear body is switchable between an allowable state in which the intermediate insertion frame portion is allowed to extend and contract due to the advancement of the unlocking operation linear body, and a restrictive state in which the intermediate insertion frame portion is restricted from extending and contracting due to the advancement of the unlocking operation linear body, The gripping piece holding mechanism for an unlocking tool as described in claim 6, characterized in that when the extension / retraction control linear body is in the restricted state, the forward movement of the unlocking operation linear body switches the holding mechanism in the attached state to the attached retracted state, and the retreat of the unlocking operation linear body switches the holding mechanism in the attached retracted state to the attached state.

8. The tip insertion frame is provided with a camera.

8. The gripping piece holding mechanism for an unlocking tool according to claim 7, wherein the extension control linear body also serves as a video signal line connected to the camera.

9. The grip piece holding mechanism for an unlocking tool according to any one of claims 1 to 5, The unlocking piece, An unlocking tool comprising:

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