JP2007107271A - Door lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door lock which can reduce strong sound occurring at the time of opening a door to a possible minimum extent or can eliminate the same. <P>SOLUTION: The door lock is formed of an inverting latch, a latch spring for energizing the inverting latch in a protruding direction, and a latch operating rod for receding together with the inverting latch against a spring force of the latch spring and being formed of a member different from the inverting latch. At the start of opening the door, the inverting latch abuts on an edge of a receiving fitting on a door frame, and recedes against the spring force of the latch spring. Herein the door latch has a damper device for the inverting latch, in a lock box. The damper device is formed of a rack teeth row formed on one side of a rear edge of the latch operating rod, a fixed horizontal shaft arranged in the lock box, a cylindrical rotary member rotatably arranged on the fixed horizontal shaft, for engaging with the rack teeth row, and elastic matter for applying internal resistance to rotation of the cylindrical rotary member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lock for a door provided with a reversing latch and a latch operating rod (a release member that allows the reversing latch to be operated) that is a separate member from the reversing latch.

  The configuration of the inverting latch is disclosed in Patent Documents 1-6. As is clear from these patent documents, the reversing latch does not move straight back into the lock box by operating (pressing down) the operating member (for example, operating lever) when opening the door, 1) First, when the operating member is operated, the latch locking piece pivotally supported in the lock box is directly connected to, for example, the cam member on the thumb turn side, or one or more interlocks on the operating member side of the push-pull method, for example. (2) Next, when the door starts to open, it slides against the continuous edge of the strike and resists the spring force of the latch spring. Moreover, it reverses while reversing separately and independently with respect to the release member.

  By the way, when the door is opened, the reversing latch returns vigorously while sliding on the continuous edge of the metal strike (including the continuous portion up to the vertical end surface of the door frame). Or, at the time of return, “on the strike side, rubbing against the continuous edge of the strike, particularly the end face of the continuous portion, and a momentarily strong rubbing sound (sound like bashing or rubbing)” is generated.

  Here, the problems of the prior art will be described with reference to a flowchart schematic explanatory diagram showing the problems of the prior art when the door is opened. In FIG. 16, the reference numerals of the terms such as the door frame 1, the receiving bracket 2, the continuous edge 3 of the strike, the door 4, and the reversing latch 30 are the same as those used in the description of the embodiment of the present invention. ing.

  The rubbing noise generated between the reversing latch 30 and the strike edge 3 when the door is opened is that the troyoke is box-shaped, the strike is a lid having an opening, and the reversing latch impacts. Since the stop surface is always in sliding contact with the edge portion 3 of the metal strike and moves away from the edge portion 3 of the strike, there is a problem that it amplifies by reverberation in the recess of the receiving metal fitting 2.

  That is, the symbol A in FIG. 16 is a locked state. At this time, the inversion latch 30 protrudes into the recess of the receiving metal fitting 2. Further, the inversion latch 30 is locked to a latch locking piece incorporated in the lock.

  Reference numeral B indicates the state of the door a. The door a is in an initial stage when an operation member (for example, a handle of a push / pull lock) is operated to open the door 4. At this time, the reversing latch 30 is retracted while being reversed because the stop surface 30a hits the inner edge (opening edge) of the edge 3 of the strike. At this time, the reversing latch 30 moves backward into the lock box while reversing against the spring force of a latch spring (not shown).

  Reference sign C indicates the state of the door b. In this open door b, the protruding tip of the inverted latch 30 that is inverted and retracted is in sliding contact with the outer wall surface of the continuous edge 3 of the strike.

  Reference sign D indicates the state of the door c. In this open door c, the protruding tip of the reversing latch 30 is still in sliding contact with the outer wall surface of the continuous edge 3 of the strike. Therefore, it can be seen that the reversing latch 30 and the strike are in contact with each other at the doors a to c without being separated. Further, it can be seen that the reverse latch 30 keeps pushing the strike in the reverse state by the spring force of the latch spring (not shown).

  Reference numeral E denotes a state of an open door d in which the door 4 is further opened. In this open door d, the reversing latch 30 is separated from the outer edge of the continuous edge 3 of the strike, and at that moment, the reversing latch 30 is returned to the state of symbol A by the spring force of the latch spring. At that time, the reversing latch 30 also hits the edge of the opening window of the front plate, and the outer edge of the strike and the reversing latch 30 rub against each other strongly or rub against each other. A sound such as a squeaky sound is generated.

  Therefore, at present, the lock box has a reversing latch, a latch spring that biases the reversing latch in the protruding direction, and the reversing latch is a separate member and retreats together with the reversing latch against the spring force of the latch spring. When the operation member on the wall surface side of the door is operated and the door starts to be opened, the reversing latch hits the edge of the receiving bracket on the door frame side and resists the spring force of the latch spring. Thus, in the door lock that moves backward, there is a demand for the appearance of a novel door lock that can reduce (quiet) or eliminate the above-mentioned "friction noise" as much as possible.

  Incidentally, in Patent Document 7, a damper device for a latch bolt is provided in the lock box so that the latch bolt does not protrude vigorously by the spring force of the latch spring when the operation member is released when the door is opened. Matters are disclosed.

  For example, the damper device includes a rack tooth row in which a latch and a latch shaft are formed on one side of an integrated latch bolt, a pinion that directly meshes with the latch bolt, and a torque shaft (rotary shaft) of the pinion. It is comprised by the cylindrical bearing by the side of the lock box supported through this resistance. Therefore, since the latch bolt is “one member”, the latch bolt moves backward as it is, for example, by the operating force of the lever handle. Therefore, it is a known matter to provide a latching damper device before the lock.

  However, there are various types of lock latches, and there are locks called “push-pull locks”. In particular, the lock is a push-pull lock, and it is a member separate from the latch operating rod (release member) in the lock box of the push-pull lock, and is in sliding contact with the continuous edge of the strike. However, when the damper device is provided for the “reversing latch” that reverses while independently reversing against the spring force of the latch spring, it is necessary to rationally arrange each member constituting the lock. .

  However, the lock box of the lock is generally composed of a case body and a case lid, and it is necessary to incorporate each component necessary for the push-pull lock together with a reverse latch in the limited internal space.

At present, even in a door lock (especially a push-pull lock) provided with an “inverted latch” as in Patent Document 7, from the viewpoint of the problem pointed out in FIG. 16, the inverted latch operates independently. It is desirable to rationally dispose a latch frame for a reverse latch, a latch spring, a damper device, and the like.
Japanese Patent Publication 2-55591 JP-A-11-141407 Japanese Patent Publication No. 2003-74245 Japanese Patent Publication No. 2004-16211 Japanese Patent Publication No. 2004- 211529 Japanese Patent Publication No. 2005-120769 JP-A-9-151653

  Accordingly, a first object of the present invention is to provide a “strong rubbing sound such as a basher or a gasher generated at the time of opening a door lock provided with a reversing latch that is independently and independently reversed with respect to a release member. "Is reduced (silence) or eliminated (silence) as much as possible. The second object is that a push-pull lock box can be reasonably provided with a damper device for reverse latch, and a limited space in the lock box can be effectively utilized. The third object is to prevent the viscous material from leaking outside as much as possible while the pinion gear constituting the damper device can provide resistance to the viscous material during its rotation.

  The door lock of the present invention includes a reversing latch, a latch spring that biases the reversing latch in the protruding direction, a latch operating rod that moves backward with the reversing latch against the spring force of the latch spring and is a separate member from the reversing latch. When the door starts to open, the reversing latch hits the edge of the receiving metal fitting on the door frame side, and reverses in the lock box for the door lock that moves backward against the spring force of the latch spring. A damper device for latching is provided, and this damper device is provided with a rack tooth row formed on the rear end side of the latch operating rod, a fixed horizontal shaft provided on the lock box, and rotatable on the fixed horizontal shaft. And a cylindrical rotating member that meshes with a rack tooth row, and a viscous material that provides internal resistance to the rotation of the cylindrical rotating member.

(1) For example, in the case of E in FIG. 16, at the moment when the reversing latch 30 moves away from the front surface of the strike (when it completely protrudes), the cylindrical rotating member 21 is fixed to the fixed horizontal shaft 19 or due to the damper effect of the damper device Z. Slowly rotates against the cylindrical bearing on the lock box side. Therefore, the latch operating rod is decelerated by the amount of the viscous resistance of the viscous substance and moves forward. As a result, the reversing latch protrudes completely with the biasing force of the latch spring 32 damped, and as pointed out in the prior art, the rubbing sound (sounding buzzer or gasping sound) is reduced or eliminated as much as possible. be able to.
(2) The invention described in claim 2 can effectively utilize the limited space in the lock box.
(3) The invention according to claim 3 can prevent the viscous material constituting the damper device from leaking to the outside as much as possible.

  A first embodiment of the present invention will be described with reference to FIGS. First, the environmental member will be briefly described. 1 is a door frame of an entrance / exit of a bedroom, toilet, and each room, 2 is a metal receiving bracket having a trolley and a strike, 3 is an edge of the strike fixed to the door frame via a fixing tool, and 4 is a horizontal A door (for example, an indoor door) that pivots in the direction to open and close the doorway 5 is a lock provided at the door end of the indoor door 4, which is a push-pull lock 5 in this embodiment.

  On the upper side of the lock box 6 of the lock 5, when a rotation button provided so as to be rotatable with respect to the front plate 7 is rotated, the release mode of the latch locking piece (locking piece) in the push-pull lock is brought about. A latch release mechanism X for switching to either the push-pull specification or the pull specification is incorporated.

  On the other hand, on the lower side of the lock box 6, the thumb-turn lock-out prevention device is such that when the door is closed while the door is closed inadvertently when the door is opened, the lock state of the reverse latch is automatically unlocked. Y is provided. The specific configuration of the anti-lockout device Y is not relevant to the present invention, and is therefore omitted.

  Next, the structure and main members of the lock box 6 will be described with reference to FIG. The lock box 6 includes a case body 6 a and a rectangular case lid 6 b that closes one side opening of the case body 6 a, and the case body 6 a has a front plate 7. Here, the “front plate 7” means the long plate-shaped front plate 7a and / or the front 7b. In the case where the pre-mounting plate 7a and the front 7b are separate bodies, they are combined via a fixing tool (not shown).

  Reference numeral 8 denotes a partition-like latch frame formed or provided on the case body 6a with reference to an opening window 9 formed in the center of the front plate 7. The latch frame 8 is formed as shown in FIG. For example, it is formed in an end face U-shape. Here, the latch frame portion 8 will be briefly described with reference to FIG. 8a is an upper wall, 8b is a lower wall, and 8c is a rear wall that intersects the upper and lower walls.

  Thus, the upper wall 8a is formed with a first receiving hole 10 for the first locking piece that constitutes the unlocking mechanism X of the reversing latch. On the other hand, the lower wall is opposed to the first receiving hole 10. The wall 8b is formed with a second receiving hole 11 for a second locking piece (not shown) constituting the thumb turn lockout prevention device Y.

  In the present embodiment, the first and second receiving holes 10 and 11 are horizontal long holes formed from the opening window 9 side toward the rear wall 8c. Further, a notch 12 for a latch operating rod is formed on one side wall (a side wall on the wide side wall side of the case body) of the rear wall 8c of the latch frame 8 in a part in the vertical direction (for example, the central part). Returning to FIG. 2, reference numeral 14 denotes a support portion (fitting hole) for a rotary button formed on the upper side of the front plate 7.

  Further, in the upper central portion of the lock box 6, a pair of upper and lower horizontal members are provided in order to horizontally guide one or more sliding members incorporated in the lock box so as to be engaged with the latch locking pieces 60. Guide portions (for example, horizontal long holes, horizontal grooves, etc.) 16 are formed. In the present embodiment, a plurality of horizontal guide portions 16 are formed.

  Further, since the lock 5 of the present invention is applied to a push-pull lock, a rectangular window hole 17 for an interlocking piece (for example, a pressing piece) interlocked with an operation handle is provided at an upper corner of the lock box 6. Is formed. Further, the lock box 6 is provided with fixed horizontal shafts 18 and 19 for swinging (turning) the latch locking piece 60 and the operation lever 55 in the horizontal direction. Here, for convenience of explanation, reference numeral 18 denotes a first fixed horizontal axis for the latch locking piece, and reference numeral 19 denotes a second fixed horizontal axis (or torque axis) for the operating lever. In addition, the lock box 6 is provided with a spring receiver 20, a mounting hole and the like in the vicinity of the front plate 7.

  Accordingly, the lock box 5 includes an opening window 7, a rotation button fitting hole 14, a horizontal guide portion 16 for guiding the sliding body, a pressing piece window 17 on the inner and outer operating handle sides, and a plurality of swing members for each swing member. The fixed horizontal shafts 18 and 19 are formed, and a latch frame portion 8 for guiding the inversion latch with respect to the opening window 7 is provided or formed. Note that portions not related to the configuration of the present invention are omitted.

  Next, main members incorporated in the lock box will be described. Reference numeral 30 denotes a reversing latch that is provided in the latch frame 8 and moves forward and backward with reference to the front plate 7b of the front plate 7. The reversing latch 30 engages with the strike of the metal receiving bracket 2 as is well known. In particular, the reversing latch 30 returns vigorously while sliding and contacting the edge 3 of the metal strike described above when the door 4 is opened and closed. Therefore, when the reversing latch slides or returns, for example, “Strong rubbing on the strike side” Sound "is generated.

  Therefore, the “(inverted) latch” here means what is called an “inverted latch” in relation to the object of the invention, and an example of the inverted latch is schematically shown in FIG. As described above, the inversion latch 30 is a separate member from the latch operating rod (release member) 33. Operates (reverses) independently when the door is opened and closed.

  Here, the configuration of the inverting latch 30 will be described with reference to FIG. Reference numeral 30a denotes a vertical stop surface that is in sliding contact with an edge portion (opening edge, door frame edge, etc.) 3 of the strike. Reference numerals 30b and 30b denote protrusions protruding from the upper and lower surfaces of the reversing latch 6, respectively. These projecting parts 30b and 30b function as a rotating shaft of the reversing latch, and engage with a latch locking piece described later. Have Reference numerals 30c and 30c denote rear end portions of the inversion latch, and the rear end portions 30c and 30c are formed with spring end storage portions 31 for supporting one end portion 32a of the latch spring 32, respectively.

  Reference numeral 32 denotes a latch spring in which one end 32a is pressed against the end face L-shaped tip 34 of the latch operating rod 33 corresponding to the latch shaft, and the other end 32b is pressed against the inner surface of the rear wall 8c of the latch frame 8. In this embodiment, as shown in FIG. 1, the one end portion 32 a of the latch spring 32 is in pressure contact with the inner surface of the tip end portion 34 a of the latch operating rod 33. Therefore, the latch spring 32 is incorporated into the spring end storage portion 31 of the reversing latch 30 via the tip end portion 34a of the latch operating rod 33, and constantly biases the reversing latch 30 in the protruding direction.

  Next, the latch operating rod (simply referred to as “operating rod”) 33 will be described with reference to FIGS. 3 and 4. Reference numeral 34 denotes an L-shaped tip portion of the operating rod, and this tip portion 34 is directly or indirectly incorporated into the inner wall surface of the spring end accommodating portion 31 of the reversing latch 30, and the inner wall surface by the spring force of the latch spring 32. Press contact.

By the way, regarding the form of the operating rod 33, it is possible to change the design arbitrarily such as a rod shape or a plate shape. However, in this embodiment, a spring end support wall 34a for receiving one end portion 32a of the latch spring 32, and the spring end support wall A leading end 34 having a sliding wall 34b continuously provided in a crossing manner with respect to 34a and guided by the notch 12 of the latch frame 8 described above, and a rear end 35 connected to the leading end 34 in a plate shape. A rack tooth row 36 is formed on one side (upper side) of the rear end portion 35.
Thus, a required spring accommodating space 39 into which the latch spring 32 can be incorporated is provided between the spring end support wall 34a and the intermediate projection wall 38 facing the inner wall surface having the spring end support projection 37. Yes.

  Here, with reference to FIG. 5 thru | or FIG. 7, the damper apparatus Z for the inversion latch 30 provided in the lock box 6 is demonstrated. The damper device Z shown in the drawing includes a rack tooth row 36 formed on one side of the rear end portion 35 side of the latch operating rod 33 and a fixed horizontal shaft (support shaft) 19 fixedly provided on the lock box 6 side. A cylindrical rotating member 21 that is rotatably provided on the fixed horizontal shaft 19 and has engaging teeth 23a that mesh with the rack tooth row 36; and a cylindrical rotating member with respect to the outer periphery of the fixed horizontal shaft 19 It consists of a viscous material 22 (injection, coating, etc.) placed inside the cylinder 21. The viscous material 22 is preferably a highly viscous material called silicone oil or silicone grease.

  Thus, the cylindrical rotating member 21 has a pinion gear 23 having a stepped cross section in the cylinder, and one or a plurality of small protrusions 25 formed in the pinion gear and providing resistance to the viscous material 22. The lid plate 24 closes one side of the viscous material housing hole formed in the pinion gear 23. In the present embodiment, the small protrusions 25 are formed in a state of being “two” opposed to the inner periphery of the pinion gear 23, and have a function of obstructing (providing resistance) against the viscous material 22 when the pinion gear 23 rotates. Demonstrate.

  Incidentally, as shown in FIG. 7, the inside of the pinion gear 23 has a stepped cross section, and is connected to a small-diameter shaft hole 27 and a viscous substance having a diameter larger than that of the shaft hole 27. Each of the holes 28 communicates with the storage hole 28 and has a fitting hole 29 having a diameter larger than that of the storage hole 28.

  The other configuration of the damper device Z is substantially the same as the configuration of the damper device Z shown in the drawings, and although not particularly shown, a fixed horizontal axis (torque shaft) is integrally formed on the cylindrical rotating member 23 side. On the other hand, a cylindrical bearing that supports the fixed horizontal axis via the viscous material 22 may be fixed to the lock box 6 side (a known configuration of Patent Document 7).

  Further, the optimum lock of the present invention will be described. The lock 5 of the present invention is a push-pull lock provided with a latch release mechanism X. The push-pull lock 5 includes at least one sliding body 46 (47) that slides in the lock box 6 by the operating force of the operating handle, and an operating lever 55 that is pivotally supported to engage with the sliding body. A latch locking piece 60 pivotally supported so as to be linked to the operating lever is provided, and the operating lever 55 is pivotally supported on the fixed horizontal shaft 19 so as to be shared with the cylindrical rotating member 21.

  Therefore, members constituting the latch release mechanism X will be described. Reference numeral 40 denotes a rotation button provided so as to be rotatable with respect to the front plate 7. When this rotation button 40 is rotated by approximately 90 degrees, the release mode of the latch locking piece in the push-pull lock is pushed in this embodiment.・ Switch to either pull specification or pull specification. The rotation button 40 will be described with reference to FIGS. 1 and 6.

  Reference numeral 41 denotes a peripheral drum portion, and the peripheral drum portion 41 is located on the inner wall surface side of the front plate 7 a for attaching the lock box 6. Reference numeral 42 denotes one or more stoppers projecting in the radial direction on the outer peripheral wall surface of the peripheral body part 41, and the stopper part 42 regulates the advancement of the second sliding body, which will be described later, depending on the rotational position of the rotary button 40. Perform functions.

  43 is a fitting projection provided on the front surface of the peripheral body 41, and this fitting projection 43 is fitted in the fitting hole 14 of the front plate 7. The front surface of the fitting protrusion 43 is flush with the front surface of the front 7b, and has a groove 43a for a small driver (not shown).

  Reference numeral 44 denotes a square or rectangular plate-like spring support portion formed continuously between the fitting protrusion 43 and the peripheral body portion 41. A click spring 45 is provided for the rotation button 40. The left and right rod-like contact portions 45a, 45a of the click spring 45 are in pressure contact with the outer peripheral surface of the spring support portion 44, respectively.

  Next, in FIGS. 1 and 10, 46.47 is a push / pull sliding body disposed horizontally in the storage space above the lock box 5. Here, the sliding body of the outer frame is referred to as the first sliding body 46, while the frame-shaped sliding body incorporated in the sliding body of the outer frame is referred to as the second sliding body 47. Further, a member interlocking with the outer operation handle is referred to as an upper pressing piece 48, while a member interlocking with the inner operation handle is referred to as a lower pressing piece 49.

  Therefore, the first sliding body 46 of the outer frame and the second sliding body 47 on the inner side will be described with reference to FIG. First, the first sliding body 46 of the outer frame is provided on the horizontal guide portion 16 of the lock box 6 so as to be horizontally movable via a plurality of engaging projections.

46a is an upper wall portion, 46b is a lower wall portion, 46c is a rear wall portion orthogonal to the upper and lower wall portions, and 46d is a front wall portion facing the rear wall portion with a predetermined space.
The inner wall surface of the rear wall portion 46c has a function of a receiving plate that receives upper and lower pressing pieces 48 and 49 interlocked with an operation member (not shown). A cutout 51 for an operating lever is formed in a part of the lower wall portion 46b.

  Next, the inner second sliding body 47 is formed in a horizontally long co-shaped shape, and is associated with the rotary button 40 and the upper and lower pressing pieces 48 and 49, respectively, and moves horizontally in the outer frame first sliding body 46. It is provided freely.

  47a is an inner upper wall portion, 47b is an inner lower wall portion, 47c is an inner rear wall portion orthogonal to the upper and lower wall portions 47a and 47b, 47d is a spring receiving partition wall facing the rear wall portion, 47e. Is a tip portion related to the stopper 42 of the rotation button 40.

  The above-described relief cutout for the front wall 46d is formed in a portion of the inner upper and lower walls 47a and 47b near the tip, and a cutout for an operating lever is formed on a part of the inner lower wall 47b. An inner notch portion 54 similar to the portion 51 is formed.

  Further, the spring receiving partition wall 47d receives the other end (rear end) portion of the sliding body biasing spring 52 described above. Therefore, the urging spring 52 for the sliding body is incorporated in the first and second sliding bodies 46 and 47. In addition, a notch for relief that is not assigned a reference numeral is formed in the front wall portion 46d of the first sliding body 46.

  Next, the operating lever 55 and the latch locking piece 60 linked to the operating lever 55 will be described. The operating lever 55 is pivotally supported on the second fixed horizontal shaft 19. On the other hand, the latch locking piece 60 is pivotally supported by the first fixed horizontal shaft 18. As shown in FIG. 8, both the members 55, 60 are, for example, an engagement portion (for example, a movable protrusion) 61 protruding from the rear end portion 60 a of the latch locking piece 60 and a covered portion formed at the front end portion 55 a of the operating lever 55. The engaging portions (for example, engaging long holes) 56 are linked to each other.

  Now, as shown in FIG. 8, the actuating lever 55 is formed, for example, by forming a single plate material into a channel shape, and forming a shaft hole 57 for the second fixed horizontal shaft 19 on the opposing wall. Therefore, the operation lever 55 and the cylindrical rotating member 21 share one fixed horizontal axis (or torque axis) 19.

  The actuating lever 55 has a long plate extending on one side of the opposing wall, and an engaged portion (e.g., engaging long hole) 56 is formed at the tip 55a. Furthermore, a rising second engagement arm portion 58 is formed on the upper side of the long plate-like opposing wall, and the second engagement arm portion 58 is formed as a notch portion of the first sliding body 46 as shown in FIG. The first sliding member 47 is inserted into the notch 54 of the second sliding body 47 through 51.

  On the other hand, a shaft hole 62 for the first fixed horizontal shaft 18 is formed in the rear end portion 60 a of the latch locking piece 60 in addition to the engaging portion (for example, movable protrusion) 61 described above. When the shaft hole 62 is used as a reference, a projecting sliding contact portion 63 that can be engaged with the locking cam 38 that is pivotally supported by the operating piece 33 is provided below the shaft hole 62. Further, similarly to the second engagement arm portion 58 of the operating lever 55, the rear end portion 60a is provided with a first engagement arm portion 65 that enters into the cutout portion 51 of the first sliding body 46.

  Further, as a matter of course, the front end portion 60 b of the latch locking piece 60 has a lock portion 64 that engages with and disengages from the protrusion 30 b of the inversion latch 30. In addition, the latch locking piece 60 is always urged in a direction to engage with the latch by a spring 66 wound around the first fixed horizontal shaft 18.

  Next, the operation will be described with reference to FIGS. First, FIG. 11 shows an operation mode in which the door is slightly opened while the operation member (not shown) is pulled (or pushed). At this time, due to the operating force of the operating member, (a) for example, the inner second sliding body 47 moves to the front plate 7 side via the pressing piece 49, and (b) at the same time, the operating lever 55 is fixed to the second position. (C) At the same time, the movable protrusion 61 moves downward. (D) At the same time, the latch locking piece 60 rotates clockwise with the first fixed horizontal shaft 18 as a fulcrum. Rotate in the direction away from the protrusion 30b of the inversion latch 30.

  As described above, in (a) to (d), the respective members are simultaneously interlocked due to the operation of pulling (or pushing) the operation handle, and as a result, the locked state of the latch locking piece 60 with respect to the inversion latch 30 is eliminated. Is done.

  Therefore, when the door starts to open slightly, (e) the reversing latch 30 is pushed by the edge 3 of the metal strike, so that it corresponds to the opening amount and resists the spring force of the latch spring 32. Reverse and reverse. (F) When the reverse latch 30 is retracted, the operating piece 33 is naturally retracted against the spring force of the spring 32. At this time, the operating piece 33 interlocked with the operation of the reversing latch 30 moves backward in the direction of arrow A, so that the cylindrical rotating member 21 also rotates in the same direction (counterclockwise) as the operating lever 55. At this time, the cylindrical rotating member 21 rotates against the fixed horizontal shaft 19 against the viscous resistance (internal resistance) of the high-viscosity substance 22 inside the cylinder. It cannot be opened.

  On the other hand, FIG. 12 shows a case corresponding to the door opening d in FIG. As described above, generally, at the moment when the reversing latch 30 is released from the edge 3 of the strike, the reversing latch 30 is urged by the urging force of the latch spring 33 and tries to protrude completely in the direction of the arrow B. Even when 30 moves forward, due to the damper effect of the damper device Z, the cylindrical rotating member 21 rotates slowly with respect to the fixed horizontal shaft 19 or the cylindrical bearing on the lock box side.

Therefore, the operating rod 33 is decelerated by the amount of viscous resistance of the viscous substance 22 and moves forward. As a result, the reverse latch protrudes completely in a state where the urging force of the latch spring 32 is attenuated, so that the “friction sound” is reduced or eliminated as pointed out in the prior art.
When the operation member is released, each member is operated in the opposite manner to the above-described (a) to (d) (the second sliding body 47 is moved to the right side, the operation lever 55 is rotated in the clockwise direction, and the movable protrusion 61 is operated. Is moved upward, and the latch locking piece 60 is rotated counterclockwise).

  Next, in this section, a description will be given of a second embodiment in which the main part of the push-pull lock 5 shown in FIGS. 13 to 15 (the linked structure of the operating lever 55A and the latch locking piece 60) is changed. In the description of the second embodiment, the same or similar parts (functions are the same) as those in the first embodiment are denoted by the same or similar reference numerals, and redundant description is omitted.

  The second embodiment differs from the first embodiment in that an operating lever 55A supported on the second fixed horizontal shaft 19 so as to engage with the inner frame-shaped second sliding body 47, and the operating lever 55A In combination with the latch locking piece 60A pivotally supported by the first fixed horizontal shaft 18 so as to be linked.

  This difference is apparent when, for example, FIG. 8 is compared with FIG. That is, in the first embodiment, an engaging portion (for example, a movable protrusion) 61 protruding from the rear end portion 60 a of the latch locking piece 60 and an engaged portion (for example, engaging portion) formed at the tip end portion 55 a of the operating lever 55. In the second embodiment, the front end portion 55a of the operating lever 55A is on the rear end portion 60a of the latch locking piece 60A.

  Even if the design of the main part of the push-pull lock 5 is changed as described above, the same object as that of the first embodiment can be achieved, and the same operation and effect can be obtained.

  In addition, the push-pull lock 5 of the present embodiment is configured such that when the tip of a driver (not shown) is inserted into the groove 43a of the rotation button 40 from the front of the front plate 7 and the rotation button 40 is rotated, The release mode of the latch locking piece 60 in the pull lock is switched to either the push / pull specification or the pull specification (or push specification).

1 to 12 are explanatory views showing a first embodiment of the present invention. FIGS. 13 to 15 are explanatory views showing a second embodiment in which the design of the main part of the push-pull lock is changed. FIG. 16 is a schematic flowchart illustrating the problems of the prior art.
Schematic explanatory drawing which shows the internal structure of the lock when the door is closed. Explanatory drawing of the lock box which mainly made the case body. Explanatory drawing of a latch, a latch frame part, a latch spring, and an operating rod. The schematic explanatory drawing of the principal part (an actuating rod and a cylindrical rotating member). The schematic explanatory drawing of the principal part (an actuating rod, a cylindrical rotating member, and a fixed horizontal axis) seen from the rear wall side of the lock box. Fig.6 (a) is a front view of the cylindrical rotation member containing a fixed horizontal axis, FIG.6 (b) is AA sectional view explanatory drawing of Fig.6 (a). The exploded explanatory view of the cylindrical rotation member containing a fixed horizontal axis. The perspective view of the 1st, 2nd sliding body which comprises a push pull lock, an operation lever, a latch locking piece, etc. FIG. Explanatory drawing of the rotation button, click spring, etc. which comprise a push pull lock. Explanatory drawing which shows the combination relation of the 1st sliding body and 2nd sliding body which comprise a push pull lock. Explanatory drawing of an effect | action (The operation | movement aspect of the place which started to open a little while operating an operation member). Schematic explanatory drawing which shows the internal structure of the lock at the moment of door opening. Schematic explanatory drawing of 2nd Example (schematic explanatory drawing similar to FIG. 8). Explanatory drawing similar to FIG. Explanatory drawing similar to FIG. The flowchart type schematic explanatory drawing which shows the problem of a prior art.

Explanation of symbols

X ... Latch release mechanism, Y ... Thumb turn lockout prevention mechanism, Z ... Damper device, 1 ... Door frame, 2 ... Bracket, 3 ... Edge, 4 ... Door, 5 ... Lock, 6 ... Lock box 7 ... front plate, 8 ... latch frame part, 9 ... opening window, 14 ... support part, 17 ... window hole, 19 ... fixed horizontal axis (or torque axis), 21 ... cylindrical rotating member, 22 ... viscous material, DESCRIPTION OF SYMBOLS 23 ... Pinion gear, 23a ... Engagement tooth, 24 ... Cover plate, 25 ... Small protrusion, 27 ... Shaft hole, 28 ... Viscous substance accommodation hole, 29 ... Fitting hole, 30 ... Reversing latch, 32 ... Latch spring, 33 ... Latch operating rod 34. Front end portion of latch operating rod 35. Rear end portion of latch operating rod 36. Rack tooth row 38. Intermediate projection wall 39 39 spring storage space 40 rotating button 46. 1st sliding body, 47 ... 2nd sliding body, 55.55A ... Actuating lever, 60, 60A ... Latch locking piece.

Claims (4)

A reversing latch, a latch spring that urges the reversing latch in a protruding direction, a latch operating rod that moves backward together with the reversing latch against the spring force of the latch spring and is separate from the reversing latch, and starts to open the door And the reverse latch hits the edge of the receiving metal fitting on the door frame side, and in addition to the door lock that moves backward against the spring force of the latch spring, a reverse latch damper device is provided in the lock box, The damper device includes a rack tooth row formed on the rear end side of the latch operating rod, a fixed horizontal shaft provided in the lock box, a rotatable rotation on the fixed horizontal shaft, and rack teeth. A door lock comprising a cylindrical rotating member meshing with a row and a viscous material that provides internal resistance to the rotation of the cylindrical rotating member. The lock according to claim 1, wherein the lock is a push-pull lock, and at least one sliding body that slides by the operating force of the operation handle and a shaft support that engages with the sliding body are provided in the lock box. And a latch locking piece pivotally supported so as to be linked with the actuation lever, and the actuation lever is pivotally supported on the fixed horizontal axis so as to be shared with the cylindrical rotating member. A door lock characterized by that. 3. The cylindrical rotating member according to claim 1, wherein the cylindrical rotary member has a pinion gear having a stepped cross section in the cylinder, a protrusion formed in the pinion gear and giving resistance to the viscous substance, and the pinion A door lock comprising a cover plate for closing one side of a viscous material storage hole formed in a gear. 2. The fixed horizontal shaft (torque shaft) is integrally provided on the cylindrical rotating member side, and a cylindrical bearing supporting the fixed horizontal shaft is fixed on the lock box side. A lock for doors.

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