JP4828276B2 - Locking bolt side pressure reduction structure of locking device - Google Patents

Description

  The present invention relates to a fastening bolt for a locking device that inserts and removes a fastening bolt that advances and retreats from a lock box provided on a door, that is, a dead bolt that is a final fastening bolt or a latch bolt that is a temporary fastening bolt, into a strike hole provided in a door frame. The present invention relates to a structure for reducing side pressure.

  Some lock devices provided on the door include a lock box provided with a temporary fastening bolt or an empty fastening bolt and a final fastening bolt. The fastening bolt is also referred to as a latch bolt, and can be protruded and pushed in from the lock box by a spring, so that the door can be closed. The latch bolt is retracted into the lock box by the rotation operation of the door knob, and the door can be opened, that is, the door is temporarily tightened. On the other hand, the final tightening bolt is also called a dead bolt, and is moved out of the lock box by the locking / unlocking mechanism inside the lock box by rotating the cylinder lock or thumb turn on the outdoor side, and enters the strike hole provided on the door frame side. That is, the door is locked. Deadbolts can also be part of the structural strength.

  Tightening bolts can be part of the structural strength, so if you try to open the door and forcibly push or pull the door in the opening direction through the door knob, the side of the bolt is strongly against the bolt opening edge of the lockbox front plate. As a result of the increased side pressure being pressed or a severe collision, the bolt opening edge and / or the bolt are damaged, and there is a disadvantage that the plastic deformation causes rattling.

  In order to eliminate such problems due to side pressure, for example, in the latch bolt mechanism disclosed in Patent Document 1, the cross-sectional shape of the plane parallel to the front plate of the lock box is corrugated on the upper surface and / or lower surface of the latch bolt. A grooved surface is formed, and the bolt opening of the front plate where the latch bolt protrudes and protrudes is formed to be approximately the same as the cross-sectional shape of the latch bolt so that the latch bolt and the bolt opening of the front plate are engaged with each other. Even if a large lateral pressure is applied to the bolt, the latch bolt and the latch opening are not damaged or plastically deformed.

  Further, in the structure of the lock dead bolt disclosed in Patent Document 2, a lock dead consisting of a frame-shaped body and a cap-shaped engagement head that is fixedly fitted to the front end of the frame-shaped body. In the structure of the bolt, a plate-like holding piece is fixedly fitted in a gap set between the inserted end of the frame-like body and the inner wall surface of the engaging head. The holding piece protrudes from the horizontal wall of the engaging head so that side pressure is applied to the wide vertical wall of the lock box near the dead window when external pressure is applied to the dead bolt from the outside to the inside of the room. By having the restraining projection part to perform, the side pressure crossing the dead bolt is prevented from being concentrated on the edge of the dead window of the lock box.

Furthermore, in the tightening emergency opening device lock disclosed in Patent Document 3, a rotatable needle pin perpendicular to the advancing and retreating direction of the dead bolt is provided on the strike inner wall surface that the dead bolt contacts and the lock box inner wall surface. Provided to reduce dead bolt advance / retreat resistance due to side pressure.
JP 2004-324114 A JP 2003-247363 A JP-A-51-80497

  However, the techniques disclosed in Patent Documents 1 and 2 described above solve the problem of the dead bolt and the lock box front plate that are generated as the side pressure increases. For this reason, for example, as shown in FIG. 12 (a), there is no problem when there is no pressure difference in the space partitioned by the door 1, for example, the two rooms 3a, 3b, but as shown in FIG. 12 (b), When there is a pressure difference between the two chambers 3a and 3b, a side pressure is generated that the side surface 5a of the dead bolt 5 is pressed against the inner wall surface 7a of the strike hole 7, and the rotation operation of the outdoor cylinder lock or thumb turn is performed. It could be difficult.

  Further, when the electric lock is provided, if a pressure difference as described above occurs, a large side pressure is applied to the dead bolt, and there is a possibility that an excessive load is applied to the electric actuator that operates the dead bolt.

  On the other hand, although the technique disclosed in Patent Document 3 can reduce the forward / backward resistance of the dead bolt, the needle pin that contacts the dead bolt must be provided on both the inner wall surface of the lock box and the inner wall surface of the strike. The structure becomes complicated and the product cost increases, and both the lock box and the strike must be changed, and much effort is required to replace the existing lock device.

  In addition, the latch bolt is the same as the dead bolt, and if the same side pressure as described above due to the pressure difference or the like acts on the latch bolt, the operation of the latch bolt is hindered and the operation of the handle, lever, etc. becomes difficult. In some cases, too, if this is electric, there is a risk of overloading the electric actuator.

  The present invention has been made in view of the above situation, and it is an object of the present invention to provide a tightening bolt side pressure reducing structure for a locking device that can reduce the receding resistance of the tightening bolt with a simple structure even when a side pressure is generated.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The tightening bolt side pressure reducing structure of the locking device according to claim 1 of the present invention is the tightening bolt side pressure of the locking device that inserts and removes the tightening bolt 13 that moves forward and backward from the lock box 21 provided in the door into the strike hole 63 provided in the door frame. A reduction structure,
A friction reducing member M for reducing sliding contact friction with the inner wall surface 63a of the strike hole 63 is provided on the side surface 13a of the fastening bolt 13 facing the inner wall surface 63a of the strike hole 63.

  In this tightening bolt side pressure reducing structure of the locking device, even if the side surface 13a of the tightening bolt 13 is pressed against the inner wall surface 63a of the strike hole 63 due to an atmospheric pressure difference or the like, the friction reducing member M is in friction with the inner wall surface 63a of the strike hole 63. And the withdrawal of the fastening bolt 13 from the strike hole 63 is smooth.

The tightening bolt side pressure reducing structure of the locking device according to claim 1 , wherein the friction reducing member M is pivotally provided in the tightening bolt 13 so as to be partially rotatable from a side surface 13 a of the tightening bolt 13. It is the member 65, It is characterized by the above-mentioned.

  In this tightening bolt side pressure reducing structure of the locking device, when side pressure is generated, the sliding contact resistance (friction) between the side surface 13 a of the tightening bolt 13 and the inner wall surface 63 a of the strike hole 63 is caused by the rotation of the rotating member 65. Reduced.

The tightening bolt side pressure reducing structure of the locking device according to claim 2 is characterized in that the rotating member 65 is provided on both side surfaces 13 a and 13 a of the tightening bolt 13.

  With this tightening bolt side pressure reduction structure of the locking device, it is possible to reduce even the side pressure caused by an external force in any direction on either the front or back side of the door. In addition, the lock device can handle the left and right sides.

The tightening bolt side pressure reducing structure of the lock device according to claim 3 is characterized in that the rotating member 65 is a sphere 67.

  In this tightening bolt side pressure reducing structure of the locking device, the tightening bolt 13 makes point contact with the inner wall surface 63a of the strike hole 63 via the sphere 67, and the sphere 67 rotates in an arbitrary direction, so that sliding resistance (friction) ) Is greatly reduced compared to the case of conventional surface contact.

The tightening bolt side pressure reducing structure of the locking device according to claim 4 , wherein the rotating member 65 is rotatable by a support shaft 81 a that is orthogonal to the advancing and retreating direction of the tightening bolt 13 and parallel to the side surface 13 a of the tightening bolt 13. The roller 81 is supported by the roller.

  In this tightening bolt side pressure reducing structure of this locking device, the tightening bolt 13 is in line contact with the inner wall surface 63a of the strike hole 63 via the roller 81, and the roller 81 rotates about the support shaft 81a, thereby sliding contact. Resistance (friction) is reduced compared to conventional surface contact.

The tightening bolt side pressure reducing structure of the locking device according to claim 1 , wherein an inner wall surface of the strike hole is formed in parallel with an advancing and retreating direction of the tightening bolt, and the tightening bolt is inserted when the tightening bolt enters the strike hole. The friction reduction member is disposed on the side surface in the vicinity of the front end of the tightening bolt.

  In this tightening bolt side pressure reduction structure of this locking device, the inner wall surface is located as far as the strike hole, and the friction reducing member is located near the end of the tightening bolt. Smooth until it comes out of the hole.

  According to the tightening bolt side pressure reducing structure of the locking device according to claim 1 of the present invention, the friction reduction for reducing the sliding friction with the inner wall surface of the strike hole on the side surface of the tightening bolt facing the inner wall surface of the strike hole. Since the member is protruded, the friction reducing member reduces the friction with the inner wall surface of the strike hole even if the side surface of the tightening bolt is pressed against the inner wall surface of the strike hole due to the pressure difference, etc. Escape is smooth. As a result, even if a side pressure is generated, the force for pulling the fastening bolt into the lock box can be reduced, and the receding resistance of the fastening bolt can be reduced with a simple structure in which a friction reducing member is provided only on the fastening bolt. be able to.

According to the tightening bolt side pressure reducing structure of the locking device according to claim 1 , the friction reducing member is a rotating member that is rotatably provided in the tightening bolt with a part protruding from the side surface of the tightening bolt. When the side pressure is generated, the sliding resistance (friction) between the side surface of the fastening bolt and the inner wall surface of the strike hole can be reduced by turning the turning member.

According to the tightening bolt side pressure reducing structure of the lock device according to claim 2 , since the rotating members are provided on both side surfaces of the tightening bolt, even if the side pressure is due to an external force in any direction on either the front or back side of the door. It can be reduced and the locking device can be adapted to the left and right sides.

According to the tightening bolt side pressure reducing structure of the lock device according to claim 3 , since the rotating member is a sphere, the tightening bolt makes point contact with the inner wall surface of the strike hole via the sphere, and the sphere is in an arbitrary direction. By rotating, sliding contact resistance (friction) can be greatly reduced as compared with the case of conventional surface contact. Further, in the case of a sphere, expansion can be facilitated in a limited space on the side surface of the fastening bolt.

According to the tightening bolt side pressure reducing structure of the lock device according to claim 4 , the rotating member is a roller that is rotatably supported by a support shaft that is orthogonal to the advancing and retracting direction of the tightening bolt and parallel to the side surface of the tightening bolt. As a result, the tightening bolt makes linear contact with the inner wall surface of the strike hole via the roller, and the roller rotates around the support shaft, so that the sliding resistance (friction) can be reduced compared to the conventional surface contact. Can be reduced. In the case of a roller, the load resistance can be increased.

According to the tightening bolt side pressure reducing structure of the locking device according to claim 1, the inner wall surface is located to the depth of the strike hole, and the friction reducing member is located in the vicinity of the tip of the tightening bolt entering the strike hole, As a result, when the tightening bolt is pulled out, the sliding friction is reduced until the front end side of the tightening bolt comes out of the strike hole, resulting in smoothness.

Preferred embodiments of a tightening bolt side pressure reducing structure for a locking device according to the present invention will be described below in detail with reference to the drawings.
1 is a side view of a locking device having a tightening bolt side pressure reducing structure according to the present invention, FIG. 2 is a perspective view of the locking device shown in FIG. 1, and FIG. 3 is a crossing of a dead bolt portion of the locking device shown in FIG. FIG. 4 is an exploded perspective view of the dead bolt shown in FIG. 3, and FIG. 5 is a cross-sectional view of the dead bolt shown in FIG.
The locking device 100 houses the locking / unlocking mechanism 23 in the lock box 21. A mounting plate 25 is provided on the front end surface of the lock box 21, and the mounting plate 25 is fixed to the door mouth by a fixing screw 27. On the surface of the mounting plate 25, a front panel 29 exposed to the end is further fixed by a decorative screw 31. As a result, the lock box 21 is covered with the front panel 29 at the door end, and the dead bolt 13, which is a final fastening bolt, is advanced and retracted from the dead bolt entrance 29 a formed in the front panel 29.

  One end of the Dharma shaft 35 is engaged with, for example, a connecting portion (so-called tail piece) of a cylinder lock provided on the outdoor side of the door (the back side of the paper in FIG. 1). Further, a thumb turn provided on the indoor surface side (the paper surface side in FIG. 1) of the door is inserted into the other end side of the Dharma shaft 35. The Dalma shaft 35 is provided with a pressing rod 37 protruding outward in the radial direction, and the tip of the pressing rod 37 rotates around the tip of a swinging rod 39 that is rotatably supported by a support shaft (not shown) that is a support / fastening member. It is connected freely. Accordingly, the dharma shaft 35 is controlled to rotate within a rotation angle range of 90 °, for example, and is moved toward one side of the rotation angle range of 90 ° by the swinging spring 41 that is extrapolated to the swinging rod 39. Is urged to rotate.

  A guide shaft 43 as a support / fastening member is erected in the lock box 21, and the guide shaft 43 guides a long hole 13 b formed in the dead bolt 13. The dead bolt 13 protrudes out of the lock box 21 when the rear notch is pressed by the above-described pressing rod 37. The protruding dead bolt 13 is prevented from moving backward by a stopper 47, which is supported by a stopper shaft 45, which is a support / fastening member, so that the base end is swingably pivoted by the biasing force of the stopper spring 49. It has come to be.

  The dharma shaft 35 is rotated counterclockwise in FIG. 1 in a state where the dead bolt 13 is protruded, thereby pressing the rear notch of the dead bolt 13 through the pusher 37 to retract the dead bolt 13. (Move to the right in FIG. 1). At this time, the release pin 51 simultaneously depresses the stopper 47 to release the non-retractable engagement state between the stopper 47 and the dead bolt 13.

  The dead bolt 13 that has advanced from the dead bolt entrance 29a of the front panel 29 enters a rectangular strike hole 63 of the strike 61 shown in FIG. Inside the strike hole 63, an inner wall surface 63a bent from one side of the strike hole 63 to the inside of the hole is formed, and the inner wall surface 63a faces the side surface 13a of the dead bolt 13. In the present embodiment, the case where the inner wall surface 63a is provided only on one side portion of the strike hole 63 is illustrated. However, the strike hole 63 is connected to another parallel side portion on the other inner side parallel to the inner wall surface 63a. Of course, it may have a wall surface. In addition, the inner wall surface 63 a has a length that extends to the depth of the strike hole 63 and substantially corresponds to a length that the dead bolt 13 enters.

  A friction reducing member M that reduces sliding friction with the inner wall surface 63a of the strike hole 63 is provided on the side surface 13a of the dead bolt 13 facing the inner wall surface 63a of the strike hole 63, preferably in the vicinity of the tip. . By providing the friction reducing member M, the friction reducing member M reduces the friction with the inner wall surface 63a even if the side surface 13a of the dead bolt 13 is pressed against the inner wall surface 63a of the strike hole 63 due to a pressure difference or the like. The bolt 13 is smoothly pulled out from the strike hole 63. The friction reducing member M is preferably made of a rotating member 65. The rotating member 65 is provided in the dead bolt 13 so as to be rotatable with a part protruding from the side surface 13 a of the dead bolt 13. When the friction reducing member M is the rotating member 65, when side pressure is generated, the sliding contact resistance (friction) between the side surface 13 a of the dead bolt 13 and the inner wall surface 63 a of the strike hole 63 is reduced. This can be reduced by turning.

  In the present embodiment, a spherical body 67 is used as the rotating member 65. Since the rotating member 65 is a sphere, the dead bolt 13 is brought into point contact with the inner wall surface 63a of the strike hole 63 via the sphere 67, and the sphere 67 is rotated in an arbitrary direction. Friction) can be greatly reduced compared to the case of conventional surface contact. Further, in the case of the sphere 67, it is possible to easily increase the number of spaces in a limited space on the side surface 13a of the dead bolt 13. In FIG. 2, reference numeral 68 represents a notch for avoiding interference with the sphere 67.

  In the present embodiment, as shown in FIG. 4, the dead bolt 13 is formed by integrally forming four rectangular metal plates 69a, 69b, 69c, and 69d in a laminated form. On the inner two metal plates 69b and 69c, a substantially hemispherical recess 71 for accommodating the sphere 67 is formed. Further, the outer metal plates 69 a and 69 d are formed with a substantially hemispherical concave portion 73, and the concave portion 73 has an opening 75 through which a part of the sphere 67 protrudes. Accordingly, the sphere 67 is accommodated in each of the recess 71 and the recess 73, and the metal plates 69a, 69b, 69c, 69d are integrally formed, so that a sphere having a part protruding from the side surface 13a as shown in FIG. 67 is rotatably installed in the dead bolt 13.

  In addition, the spherical body 67 may be provided on both side surfaces 13a and 13a of the dead bolt 13 as illustrated. By providing the spherical body 67 on both side surfaces 13a and 13a, it is possible to reduce even a lateral pressure caused by an external force in any direction on either the front or back side of the door, and the locking device 100 can be made to handle both right and left. It becomes like this.

  Therefore, according to the tightening bolt side pressure reducing structure of the locking device 100 according to the present embodiment, the sliding friction between the side surface 13a of the dead bolt 13 facing the inner wall surface 63a of the strike hole 63 and the inner wall surface 63a of the strike hole 63 is achieved. Since the friction reducing member M is provided to reduce the friction, the friction reducing member M reduces the friction with the inner wall surface 63a even if the side surface 13a of the dead bolt 13 is pressed against the inner wall surface 63a of the strike hole 63 due to a pressure difference or the like. Then, the dead bolt 13 is smoothly removed from the strike hole 63. As a result, even if a side pressure is generated, the force for pulling the dead bolt 13 into the lock box 21 can be reduced, and a simple structure in which the friction reducing member M is provided only on the dead bolt 13 can be used. The receding resistance can be reduced.

Next, another embodiment of the tightening bolt side pressure reducing structure of the locking device according to the present invention will be described.
6 is a perspective view of a locking device provided with a roller in a dead bolt, FIG. 7 is a cross-sectional view of a dead bolt portion of the locking device shown in FIG. 6, and FIG. 8 is an exploded perspective view of the dead bolt shown in FIG. FIG. 9 is a cross-sectional view of the dead bolt shown in FIG. In addition, the same code | symbol is attached | subjected to the member same as the member shown in FIGS. 1-5, and the overlapping description shall be abbreviate | omitted.
In the tightening bolt side pressure reducing structure of the locking device 200 according to this embodiment, the rotating member 65 that is the friction reducing member M is composed of a roller 81. The roller 81 is rotatably supported by a support shaft 81a that is orthogonal to the advancing / retreating direction of the dead bolt 13 and parallel to the side surface 13a of the dead bolt 13.

  In other words, the two metal plates 69 b and 69 c inside the dead bolt 13 are formed with a substantially rectangular hole 83 that accommodates a substantially half portion of the roller 81. Further, the outer metal plates 69a and 69d are formed with a substantially rectangular hole 85 for projecting a part of the roller 81, and the hole 85 has a pair of bearing portions 85a and 85a for accommodating the support shaft 81a on the inner surface. is doing. Accordingly, the roller 81 is accommodated in each of the holes 83 and 85, and the metal plates 69a, 69b, 69c, and 69d are integrally laminated so that a part is protruded from the side surface 13a as shown in FIG. A roller 81 is rotatably installed in the dead bolt 13. In FIG. 6, 84 represents a notch for avoiding interference with the roller 81.

  According to the tightening bolt side pressure reducing structure of the locking device 200 according to this embodiment, the rotating member 65 is freely rotatable by the support shaft 81a that is orthogonal to the advancing / retreating direction of the dead bolt 13 and parallel to the side surface 13a of the dead bolt 13. Since the dead bolt 13 is in line contact with the inner wall surface 63a of the strike hole 63 via the roller 81 and the roller 81 rotates about the support shaft 81a, the sliding contact resistance is achieved. (Friction) can be greatly reduced compared to the case of conventional surface contact. In the case of the roller 81, the load resistance can be increased as compared with the sphere 67, and the durability of the strike 61 and the rotating member 65 can be enhanced.

10 is a side view of a locking device having a latch bolt provided with a sphere, and FIG. 11 is a cross-sectional view of a latch bolt portion of the locking device shown in FIG.
In each of the above embodiments, the case where the fastening bolt is the dead bolt 13 has been described as an example. However, the fastening bolt side pressure reducing structure of the locking device according to the present invention is a case where the fastening bolt is a latch bolt. Has the same effect.
The locking device 300 provided with the latch bolt 91 includes a latch bolt 91 that can be moved forward and backward in addition to the substantially same configuration as the locking device 100 described above. In the locking device 300, the Dalma shaft 35 is rotated counterclockwise in FIG. 10 in a state where the dead bolt 13 is protruded, thereby pressing the rear notch of the dead bolt 13 via the pressing rod 37. The dead bolt 13 is moved backward (moved to the right in FIG. 10). At this time, the swinging spring 93 simultaneously presses the stopper 47 via the release piece 95 to release the engagement state between the stopper 47 and the dead bolt 13.

  Below the dead bolt 13, a latch bolt 91 fixed to the tip of the slide rod 97 is provided so as to be able to advance and retract from the lock box 21 by the biasing force of the spring 99. A knob shaft 101 is rotatably supported below the slide rod 97. The knob shaft 101 has a spring receiver 103 protruding outward in the radial direction and a pull-in piece 105. The knob shaft 101 is biased counterclockwise by the spring receiver 103 being biased by the compression spring 107, and a door knob (not shown) provided on the front and back surfaces of the door is rotated clockwise. Rotating against the urging force of the compression spring 107, the slide rod 97, that is, the latch bolt 91 is pulled into the lock box 21 through the pull-in piece 105.

  Also in such a locking device 300, the spherical body 67 or the roller 81 as the friction reducing member M can be provided on the latch bolt 91. As shown in FIG. 11, in the case of the latch bolt 91, the facing surface on the door closing side is the inclined surface 91 a, and therefore the friction reducing member M is provided on the vertical side surface 91 b on the opposite side.

It is a side view of the locking device which has a bolt tightening side pressure reduction structure concerning the present invention. It is a perspective view of the locking device shown in FIG. It is a cross-sectional view of the dead bolt part of the locking device shown in FIG. FIG. 4 is an exploded perspective view of the dead bolt shown in FIG. 3. FIG. 4 is a cross-sectional view of the dead bolt shown in FIG. 3. It is a perspective view of the locking device provided with the roller in the dead bolt. It is a cross-sectional view of the dead bolt part of the locking device shown in FIG. FIG. 8 is an exploded perspective view of the dead bolt shown in FIG. 7. FIG. 8 is a cross-sectional view of the dead bolt shown in FIG. 7. It is a side view of a locking device having a latch bolt provided with a sphere. It is a cross-sectional view of the latch bolt part of the locking device shown in FIG. It is a cross-sectional view of a dead bolt and a strike hole in which a normal time in a conventional locking device is shown in (a) and a side pressure is generated in (b).

13 ... Fastening bolt (dead bolt)
13a: Side surface of tightening bolt 21 ... Lock box 63 ... Strike hole 63a ... Inner wall surface of strike hole 65 ... Rotating member 67 ... Sphere 81 ... Roller 81a ... Support shaft 91 ... Fastening bolt (latch bolt)
100, 200, 300 ... Locking device M ... Friction reducing member

Claims (4)

A tightening bolt side pressure reduction structure for a locking device that inserts and removes a tightening bolt that moves forward and backward from a lock box provided on the door into a strike hole provided on the door frame,
A friction reducing member for reducing sliding contact friction with the inner wall surface of the strike hole is provided on the side surface of the fastening bolt facing the inner wall surface of the strike hole, and the friction reducing member extends from the side surface of the fastening bolt. It is a rotating member that is partly protruded and is rotatably installed in the fastening bolt.
An inner wall surface of the strike hole is formed in parallel with the advancing and retreating direction of the fastening bolt, and is extended in the hole back direction to the vicinity of the tip of the fastening bolt when the fastening bolt enters the strike hole. A rotating member as the friction reducing member is disposed on a side surface near the tip of
The tightening bolt side pressure reduction of the locking device, wherein the rotating member on the side surface of the tightening bolt rotates the inner wall surface of the strike hole when the tightening bolt inserted into the strike hole moves backward from the strike hole. Construction. The rotary member is tightened bolt side pressure reducing structure of the lock device according to claim 1, characterized in that provided on both sides of the clamping bolt. The rotary member is tightened bolt side pressure reducing structure of the lock device according to claim 1 or 2, wherein the a sphere. 3. The lock according to claim 1, wherein the rotating member is a roller that is rotatably supported by a support shaft that is orthogonal to the advancing and retreating direction of the fastening bolt and parallel to a side surface of the fastening bolt. The tightening bolt side pressure reduction structure of the device.

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