JP6457323B2 - Door lock - Google Patents

Description

  The present invention relates to a door lock attached to a door frame and receiving a door lock bolt.

  In the event of an earthquake, the position of the door may deviate vertically relative to the door frame of the building, and the door lock bolt may be strongly pressed inside the door lock attached to the door frame. If the bolt remains pressed against the door lock, the bolt may not be removed from the door lock even if the door is opened. In order to prevent such a situation, a door lock provided with earthquake resistance has been conventionally used.

  As this type of door lock, there is a combination of a box holder fixed to a door frame and a movable body arranged inside the box holder. The movable body has an opening that serves as a space for advancing and retreating the bolt, and is arranged inside the box receiver so as to be integrally movable relative to the box holder in the vertical direction. Usually, the movable body is regulated at a predetermined vertical position with respect to the box receiver. At the time of the earthquake, the movable body is moved relative to the box holder in the vertical direction by being pushed with a predetermined force or more from the bolt entering the opening. With this relative movement, the vertical relative positional relationship between the movable body and the bolt is prevented from changing abnormally from the normal time, and the earthquake resistance is maintained so that the bolt can be removed from the door lock by the door opening operation. (For example, patent documents 1 and 2).

  Among them, the door lock of Patent Document 1 is provided with a through-hole through which a shaft of a resin screw is passed through one of the box holder and the movable body, and a fitting port into which the shaft is screwed and fitted. The weight of the movable body loaded on the box is received at the box receiving side and the vertical position of the movable body is regulated by the shaft, and in the event of an earthquake, the force that the door side bolt pushes the movable body in the vertical direction acts as a shearing force on the shaft However, the movable body moves relative to the box holder in the vertical direction due to the shearing of the shaft.

  As in the above-mentioned Patent Document 1, the structure that regulates the vertical position of the movable body with the shaft is only required to provide through holes and fitting ports in the required number and arrangement, and the shaft can be passed through both ports, so that construction is easy. It is.

JP-A-8-312207 (particularly the examples of FIGS. 9 to 11 in the amendment of procedure dated May 15, 2002) JP 2006-257738 A

  However, in the structure that relies on the shearing of the shaft as in Patent Document 1, the seismic resistance is exhibited unless the condition that the external force loaded on the movable body from the bolt> the force required for the shearing of the shaft is not satisfied. It cannot be done, and there is a limit to the response to weak earthquakes.

  In view of the above-mentioned background, the problem to be solved by the present invention is to make a door lock that easily exhibits seismic resistance while having a structure that regulates the vertical position of the movable body with respect to the box support at the normal time. It is.

  In order to solve the above-described problems, the present invention provides a box holder fixed to a door frame and an inner side of the box holder in a state of being integrally movable relative to the box holder in a vertical direction. A movable body having an opening that is a space for advancing and retreating the bolt, and a shaft that is passed through a through-hole provided in one of the box support and the movable body and fits in a fitting opening provided in the other, The through hole has a first hole portion whose hole width is changed so as to be hooked in a direction perpendicular to the shaft, and a second hole portion communicating in the vertical direction from the first hole portion, and the shaft is A configuration is adopted in which a door lock is deformed by a vertical external force applied to the movable body and is pushed into the second hole from the first hole.

According to the above configuration, normally, the first hole portion of the through hole is hooked in the direction perpendicular to the shaft, the weight of the movable body loaded on the shaft is received on the box receiving side, and the vertical position of the movable body is It is possible to regulate.
On the other hand, when an external force in the vertical direction is applied to the movable body from the door-side bolt during an earthquake, the external force acts as a force for pressing the shaft fitted in the fitting port against the first hole of the through-hole. By this pressing, the shaft is deformed and is pushed from the first hole into the second hole before shearing. Accompanying this pushing, the earthquake resistance that the movable body moves relative to the box support in the vertical direction is exhibited. Here, the force required for deformation prior to shaft shearing is much smaller than the force required for shaft shearing. Therefore, the earthquake resistance is easily exhibited with a smaller external force as compared with the structure that exhibits the earthquake resistance due to the shearing of the shaft.

  As described above, by adopting the above-described configuration, the present invention can be configured as a door lock that easily exhibits seismic resistance while having a structure in which the vertical position of the movable body with respect to the box holder is normally restricted by the shaft. .

The figure which showed most of the door lock which concerns on 1st Embodiment of this invention by the longitudinal cross-sectional view, and showed the remainder by the external appearance The expanded sectional view of the II-II line in FIG. An enlarged sectional view taken along line III-III in FIG. (A) is the partial expanded sectional view which cut | disconnected the door lock of FIG. 1 by the IV-IV line in FIG.2, 3, (b) is a movable body with respect to a box holder from the state of said (a). Partial enlarged sectional view showing the state of relative movement downward The figure which shows the example of a change of the through-hole of 1st Embodiment by the same cut surface as FIG. Vertical sectional view of a door lock according to a second embodiment of the present invention The expanded sectional view of the VII-VII line in FIG.

  A door lock according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the door lock of the first embodiment includes a box receiver 10 fixed to the door frame F, and a movable body 20 arranged inside the box receiver 10.

  As shown in FIGS. 1 and 2, the box receiver 10 has a box shape that is opened in a direction facing the door lock R of the door D in the horizontal direction. The box receiver 10 is a metal plate-made metal fitting having excellent corrosion resistance and mechanical strength, such as a stainless steel plate. The box holder 10 is fixed to the door frame F by being screwed to the door frame F with screws 11 on both the upper and lower sides in the vertical direction. Such a box holder 10 may be generally called a troyoke.

  The movable body 20 has an opening 21 that is a space for the bolt B of the door lock R to advance and retreat. Bolt B is a sickle-shaped dead bolt. When the door lock includes a latch bolt, an opening for moving the latch bolt forward and backward may be added to the movable body 20.

  The movable body 20 is integrally provided with a functional unit that must maintain a vertical position with respect to the door D within a predetermined range, and is movable relative to the box holder 10 in the vertical direction. It is arrange | positioned inside the box receptacle 10 in a state. The movable body 20 in the illustrated example includes a strike 22, a reinforcing cover 23 that reinforces the strike 22, and a top cover 24 that covers the screw 11 and the box holder 10 as the functional units described above. The strike 22 to the top cover 24 have a structure that is integrally fastened by a screw 25 that is screwed into the female thread portion of the strike 22.

  Long side holes 12 that are long in the vertical direction are formed on both side walls along the vertical direction of the box receiver 10. On the other hand, a long hole portion 26 that is long in the horizontal direction is formed in the movable body 20 at a position that communicates with the long hole portion 12 in the horizontal direction. A pin 30 inserted between the long holes 12 and 26 is caulked. Both the long hole portions 12 and 26 and the pin 30 are disposed on both sides of the upper portion and the lower portion of the box receiver 10 and the movable body 20 in the vertical direction. These pins 30 and the like are techniques disclosed in Patent Document 2 and are employed for the purpose of improving crime prevention against the opening of the door D by a bar or the like.

  Furthermore, as shown in FIGS. 1 and 3, the door lock of the first embodiment is passed through the through-hole 13 provided in one of the box holder 10 and the movable body 20 and is fitted in the other. A shaft 31 that fits into the joint 27 is provided.

  The through-hole 13 in the illustrated example is formed long in the vertical direction on both side walls along the vertical direction of the box receiver 10. On the other hand, the fitting port 27 is formed of a female screw hole formed in the movable body 20. The fitting port 27 is formed at a position communicating with the through-hole 13 in the horizontal direction on both the upper and lower sides in the vertical direction. The shaft 31 is a male screw shaft that is screwed into the fitting port 27. The shaft 31 in the illustrated example is a shaft portion of a resin screw that is integrally formed of a resin material that is softer than the material that forms the through hole 13.

  As shown in FIGS. 3 and 4A, the hole width direction of the through-hole 13 is set to a vertical direction and a horizontal direction perpendicular to the shaft 31. The through-hole 13 has a hole shape that is changed from the hole width d1 to the hole width d2 in the middle of the hole length in the vertical direction. The hole width d1 is equal to or larger than the outer diameter of the shaft 31, and is set to be the same as the female screw hole diameter of the fitting port 27. The hole width d2 is set to a hole width d2 smaller than the outer diameter of the shaft 31. The outer diameter of the shaft 31 is set as a male screw diameter. The shaft 31 is screwed into the fitting port 27 through a hole having a hole width d1.

  That is, in the through hole 13, the hole portion from the hole width d 1 to the hole width d 2 is changed to the first hole portion 13 a in which the hole width is changed so as to be hooked in the direction perpendicular to the shaft 31.

  In addition, among the through holes 13, a second hole communicating from the first hole portion 13 a in the vertical direction (vertically downward in the upper through hole 13 in the drawing and upward in the vertical direction in the lower through hole 13 in the drawing). The part 13b is a hole part for allowing the movement of the shaft 31 whose axial diameter is deformed to the hole width d2 by an external force in the vertical direction during the earthquake by a length l in the vertical direction.

  Further, the through-hole 13 has a vertical direction in which the shaft 31 hooked in the first hole 13a in the vertical direction is opposite to the second hole 13b (in the upper through-hole 13 in the drawing, the vertical direction is upward, the lower side in the drawing). The third through hole 13 has a third hole portion 13c formed so as to be freely movable by a length of 1 or more in the downward direction in the through-hole 13. The third hole 13c is continuous over a length l in the vertical direction opposite to the second hole 13b with a hole width d1.

  4A, since the first hole 13a of the lower through-hole 13 is hooked vertically downward on the shaft 31, the weight of the movable body 20 loaded on the shaft 31 is on the box receiver 10 side. Thus, it is possible to regulate the vertically downward position of the movable body 20 with respect to the box receiver 10 with the shaft 31. Further, since the first hole 13 a of the upper through-hole 13 in the drawing can be hooked vertically upward on the shaft 31, the vertical upward position of the movable body 20 with respect to the box receiver 10 is regulated by the shaft 31. Is also possible.

  On the other hand, when an earthquake occurs, a relative displacement in the vertical direction occurs between the door frame F and the door D shown in FIG. 1. For example, when the bolt B pushes the upper side of the opening 21 upward in the vertical direction, 10, an upward external force is applied to the movable body 20 so as to move the movable body 20 relative to the vertical direction upward in the vertical direction. Since the lower shaft 31 in the drawing is fitted in the fitting port 27 of the movable body 20, the lower shaft 31 is held in a state movable in the vertical direction integrally with the movable body 20. Therefore, the lower shaft 31 in the drawing is directed to the first hole 13a of the through-hole 13 on the lower side in the drawing of the box receiver 10 fixed to the door frame F by an upward external force applied to the movable body 20. Pressed vertically upward. As a result, the lower shaft 31 in the figure is deformed so as to become smaller in the hole width direction, and becomes equal to or smaller than the hole width d2 before reaching the shear. As shown in FIG. 13 is pushed into the second hole 13b. Along with this, the earthquake resistance that the movable body 20 moves relative to the box receiver 10 in the vertical direction upward is exhibited. At this time, the upper shaft 31 in the drawing smoothly moves upward in the vertical direction within the third hole portion 13c having the vertical length 1 or more and the hole width d1 in the upper through-hole 13 in the drawing. The vertical movement of the movable body 20 is not disturbed.

  Even if the lower shaft 31 in the figure moves the length l and contacts the upper end of the lower through-hole 13 in the figure, if the movable body 20 is pushed upward, the lower side in the figure This can happen if the shaft 31 is sheared. In this case, the limit at which the movable body 20 can move relative to the box holder 10 in the vertical direction is determined by the vertical movement limit allowed for the pin 30 in the long hole portion 12. Here, the case where the movable body 20 shown in FIG. 1 is pushed vertically upward by the bolt B has been described as an example, but when the movable body 20 is pushed vertically downward by the bolt B, the example of FIG. On the contrary, the upper shaft 31 in the drawing is pushed into the second hole 13b of the upper through-hole 13 in the drawing, and the lower shaft 31 in the drawing moves in the lower third hole 13c in the drawing. Detailed description will be omitted because it is only different.

  At the time of the earthquake, the force required for the deformation (deformation corresponding to the hole width d2) before the shaft 31 pressed in the vertical direction to the first hole 13a is much smaller than the force required for the shearing of the shaft 31. . Therefore, as compared with a structure that exhibits earthquake resistance when the shaft 31 is sheared, the earthquake resistance is easily exhibited with a smaller external force.

  Thus, in the door lock of the first embodiment, the shaft 31 that passes through the through-hole 13 provided in one of the box holder 10 and the movable body 20 and fits in the fitting opening 27 provided in the other is a bolt. Since it is deformed by the external force in the vertical direction from B to the movable body 20 and is pushed into the second hole 13b from the first hole 13a of the through-hole 13, the movable body 20 with respect to the box receiver 10 is normally used. It is possible to easily exhibit seismic resistance while adopting a structure in which the vertical position is controlled by the shaft 31.

  In the second hole portion 13b of the first embodiment, the region of the hole width d2 is elongated in the vertical direction so that the shaft 31 continues to be deformed until the shaft 31 hits the end of the second hole portion 13b in the vertical direction. Although it is provided, there is no need to continue the deformation of the shaft 31 over the entire area of the second hole 13b, and after the deformation of the shaft 31 for pushing from the first hole 13a to the second hole 13b becomes unnecessary The hole width of the second hole portion may be widened so that the shaft 31 can freely move in the vertical direction.

  Further, in the first embodiment, the through hole 13 has a hole shape effective for axial restriction in one direction upward or downward in the vertical direction, and the through holes 13 are arranged in two opposite directions in the vertical direction opposite to each other, Although the corresponding fitting port 27 and the shaft 31 are arranged, the through-hole can be formed into a hole shape effective for the axial restriction in both the upward and downward directions in the vertical direction and integrated into one place. For example, as shown in a modified example in FIG. 5, one through-hole 13 ′ is connected to a first hole 13 a on the lower side in the figure that is hooked vertically upward on the shaft 31, and a second hole that communicates with the first hole 13 a vertically downward. It can be constituted by a hole 13b, a first hole 13a on the upper side in the figure that is hooked vertically downward on the shaft 31, and a second hole 13b that communicates with the first hole 13b vertically upward.

  In the first embodiment, the shaft 31 is made of resin in order to facilitate the deformation of the shaft 31 described above. However, if the material is softer than the material forming the through-hole 13, the deformation can be facilitated. it can. Depending on the setting of the outer diameter of the shaft 31 and the hole width d2, the magnitude of the force required for deformation can be changed. For example, the shaft 31 can be made of a soft metal as long as the shaft 31 can be deformed into the hole width d2 with a force smaller than the force required for shearing.

  In the first embodiment, the shaft 31 is a male screw shaft. However, the shaft may be formed of a pin member that is fixed by press-fitting the fitting port. Further, when the shaft is a male screw shaft, there is no need to use a headed male screw component as in the first embodiment, and it is configured with a bolt and a nut, and accordingly, the fitting port is a simple shaft passage corresponding to the bolt diameter. It is also possible to make holes.

  In the first embodiment, the movable body 20 is a unit that is integrally fastened. However, the movable body is integrally movable in the vertical direction with respect to the box receiver as long as the force can be transmitted to the shaft. What is necessary is just to be arrange | positioned inside the box receptacle in the state. A second embodiment as an example thereof will be described with reference to FIGS. Hereinafter, only differences from the first embodiment will be described.

  The box receiver 40 of the second embodiment is fixed to the door frame F together with the strike 50 with screws 70. The movable body 60 has an open port 61 that communicates with the receiving port of the strike 50.

  The opening 61 is formed inside the magnet holder 62. A magnet 63 is fixed to the top of the magnet holder 62. The magnet 63 is installed for detecting opening / closing of the door D. When the door D is closed and the bolt B is advanced into the opening 61, the door D is in a closed state because the magnetic sensor (not shown) of the door D converts the magnetic field of the magnet 63 into an output signal. This can be detected. That is, the magnet 63 is a functional unit that needs to maintain the position in the vertical direction with respect to the door D within a predetermined range. In the second embodiment, the top of the magnet holder 62 and the bolt B are close to each other due to the arrangement of the magnet 63 with respect to the door D, and the bolt B may be strongly pressed against the top of the magnet holder 62 during an earthquake. However, there is a space between the strike 50 and the bolt B, and the bolt B is strongly pressed against the strike 50, so that there is no fear that the bolt B will not come off.

  The movable body 60 has a pair of upper and lower holding plates 65 formed with through holes 64. The magnet holder 62 has leg portions 66 that are slidably brought into contact with the rear wall along the vertical direction of the box holder 40 on both the upper and lower sides. The leg portion 66 is in contact with the holding plate 65 in the vertical direction. A fitting port 41 is formed in the back wall along the vertical direction of the box receiver 40. The holding plate 65 is attached to the box receiver 40 by a shaft 71. The magnet holder 62 is sandwiched between the back wall along the vertical direction of the box receiver 40 and the strike 50, and is movable relative to the box holder 40 in the vertical direction.

  As described above, the movable body 60 of the second embodiment includes the magnet holder 62, the magnet 63, and the pair of upper and lower holding plates 65. When the magnet holder 62 is pushed in the vertical direction by the bolt B, the box holder Since the holding plate 65 is pushed and moved in the vertical direction by the leg portion 66 of the magnet holder 62 that moves relative to the box 40 in the same vertical direction, the holding plate 65 moves relative to the box receiver 40 integrally in the vertical direction. be able to. In the second embodiment, the through hole 64 is provided in the movable body 60 and the fitting opening 41 is provided in the box receiver 40. However, the arrangement may be reversed.

  Each embodiment disclosed this time should be considered as illustrative in all points and not restrictive. Accordingly, the scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

10, 40 Box holder 20, 60 Movable body 21, 61 Opening port 31, 71 Shaft 13, 13 ', 64 Through port 13a First hole 13b Second hole 13c Third hole 27, 41 Fitting port F Door frame D Door R Door lock B Bolt

Claims (2)

A box holder (10, 40) fixed to the door frame (F);
An advancing / retreating space for the bolt (B) of the door lock (R) disposed inside the box receiver (10, 40) so as to be integrally movable relative to the box receiver (10, 40) in a vertical direction. A movable body (20, 60) having an opening (21, 61) to become,
A shaft that passes through a through hole (13, 64) provided in one of the box holder (10, 40) and the movable body (20, 60) and fits into a fitting port (27, 41) provided in the other. (31, 71),
With
A first hole (13a) having a hole width changed so that the through-hole (13, 64) is hooked in a direction perpendicular to the shaft (31, 71), and a vertical direction from the first hole (13a) A second hole (13b) communicating with the
The shafts (31, 71) are deformed by a vertical external force applied to the movable body (20, 60) and pushed into the second hole (13b) from the first hole (13a). Door lock. The fitting port (27, 41) is composed of a female screw part,
The door lock according to claim 1, wherein the shaft (31, 71) is formed of a material softer than the through hole (13, 64) and includes a male screw shaft screwed into the fitting port (27, 41). Receiving.

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