JP2010059677A - Muffling mechanism of latch bolt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a muffling structure of a latch bolt capable of improving the silentness of a lock device by reducing the operating noise of the bolt such as impact noise, friction noise, and rattling noise. <P>SOLUTION: The muffling structure of a latch bolt 47 which is movably installed in a lock box 3 fixed to a door 1 and advanced through the end 5 of the door includes a bolt guide space which is formed between the opposed inner walls of the lock box 3 and stores the latch bolt 47 in such a manner that the latch bolt can advance and retreat, a biasing member which projects from one side surface of the latch bolt 47 and is elastically deformable in the bolt thickness direction, and a braking groove which is formed in the inner wall facing one side surface of the latch bolt 47, receives the biasing member, and gradually shallowed in the advancing direction of the latch bolt 47 until coming into contact with the biasing member. In the muffling structure of the latch bolt 47, the latch bolt 47, the inner wall of the lock box 3, and the biasing member are desirably be made of a resin. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a silencer structure for a latch bolt that is movably provided in a lock box fixed to a door and advances from a door of a door.

  The lock bolt provided in the lock device includes a dead bolt for locking, and a latch bolt that is temporarily tightened to the door frame so that the door is not opened by wind or the like. The latch bolt is advanced and retracted from the door mouth by an advancing and retracting mechanism built in the lock box. The advance / retreat mechanism retracts the latch bolt into the lock box when an unlocking operation force is input from an operation member such as a knob or a lever handle provided on the front and back surfaces of the door. Thereby, latching of the latch bolt with respect to the strike provided on the door frame side is released, and the door can be opened.

  By the way, in the latch bolt advance / retreat mechanism, the latch bolt is generally retracted by operation of the operation member, but the operation member is not rotated by the retract of the latch bolt. That is, a one-way input transmission mechanism from the operation side is configured. The latch bolt is biased in the advancing direction by a single advancing biasing spring. In such a nonreciprocal transmission mechanism, when the latch bolt is closed without being retracted by the operating member, the inclined surface of the latch bolt hits the strike edge of the strike and receives a reaction force from the strike edge. The latch bolt that has received the reaction force is pushed into the lock box against the urging force of the advance urging spring. When the door is closed, the latch bolt coincides with the strike hole, and the latch bolt is advanced again by the urging force of the advancing urging spring, and the door is temporarily tightened.

  However, the conventional latch bolt advance / retreat mechanism is not provided with a muffler structure and the like, and cannot be said to have high silence. In particular, when the operating member is closed without being retracted and the latch bolt once retracted is advanced by the urging force of the advance urging spring, the latch bolt rattles in the guide space and the latch bolt is locked in the lock box. The noise generated by sliding on the inner wall and the impact sound generated when the advancing latch bolt hit the stopper, etc. stopped, which became a noise of concern at night. In general, in order to make the movement of the lock bolt light, the lock device is provided with sufficient play between the lock box and the lock bolt. there were. In addition, in order to reduce operating noise, some were devised, such as covering the lock box, but the lock box must be provided with an opening for advancing and retracting the lock bolt, and the sound insulation structure is insufficient The effect was small.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a silencer structure for a latch bolt that can reduce bolt operating noise such as impact noise, friction noise, rattling noise, and the like, and to improve silence.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The silencing structure of the latch bolt according to claim 1 of the present invention is a silencing structure of the latch bolt 47 that is movably provided in the lock box 3 fixed to the door 1 and advances from the tree mouth 5 of the door 1. ,
A bolt guide space 41 formed between the inner walls 43 and 45 facing each other of the lock box 3 and receiving a latch bolt 47 so as to freely advance and retract;
A biasing member 83 protruding from one side surface of the latch bolt 47 and elastically deformable in the bolt thickness direction D;
A braking groove 87 formed on the inner wall 45 facing one side surface of the latch bolt 47, receiving the biasing member 83 and gradually becoming shallower in the advancing direction of the latch bolt 47 and contacting the biasing member 83. When,
It is characterized by comprising.

  In the latch bolt silencing structure, when the latch bolt 47 moves in the advancing direction, the urging member 83 gradually contacts the braking groove 87. When the urging member 83 gradually contacts the braking groove 87, the reaction force from the braking groove 87 increases and the urging member 83 is elastically deformed. Thereby, a load increases with respect to the advance operation of the latch bolt 47, and this increased load serves as a braking force for the advance operation, and the latch bolt 47 is decelerated. Further, the latch bolt 47 is offset in the bolt guide space 41 by the reaction force from the braking groove 87, and play (gap) is reduced.

The silencing structure of the latch bolt according to claim 2 is the silencing structure of the latch bolt according to claim 1,
The latch bolt 47, the inner walls 43 and 45 of the lock box 3, and the urging member 83 are made of resin.

  In the silencer structure of this latch bolt, compared to a structure in which metal members having high rigidity are in contact with each other, resin members having low rigidity are in contact with each other, so that contact noise is hardly generated. In addition, when one member is made of metal, the resin member is less likely to be worn. Further, the latch bolt 47 and the inner walls 43, 45 can be processed in a complicated shape.

The silencer structure of the latch bolt according to claim 3 is the silencer structure of the latch bolt according to claim 1 or 2,
A protrusion 95 protruding from the latch bolt 47 in the forward / backward orthogonal direction;
An impact absorbing member 93 which is provided inside the lock box 3 and hits the protrusion 95 at a position immediately before completion of advancement of the latch bolt 47;
It is characterized by comprising.

  In this silencer structure of the latch bolt, the impact load is absorbed by hitting the impact absorbing member 93 and elastically deforming the impact absorbing member 93 immediately before the latch bolt 47 comes into contact with the stopper or the like at the advanced position.

The silencer structure of the latch bolt according to claim 4 is the silencer structure of the latch bolt according to any one of claims 1, 2, and 3,
A seat plate portion 97 formed in the latch bolt 47 in the advancing and retreating orthogonal direction;
A cushion rib 99 projecting from the inner wall 45 of the lock box 3 and hitting the seat plate portion 97 at a position immediately before the completion of the advancement of the latch bolt 47;
It is characterized by comprising.

  In this silencer structure of the latch bolt, the impact load is absorbed by the elastic deformation of the cushion rib 99 in cooperation with the impact absorbing action at the time of stopping by the impact absorbing member 93 described above.

  According to the silencer structure of the latch bolt according to the first aspect of the present invention, the urging member elastically deformable in the bolt thickness direction is provided so as to protrude from one side surface of the latch bolt, and faces one side surface of the latch bolt. The inner wall is formed with a braking groove that receives the biasing member and gradually becomes shallower toward the advancement direction of the latch bolt and contacts the biasing member. Therefore, when the latch bolt moves in the advancement direction, the biasing member gradually moves into the braking groove. The urging member is elastically deformed by the reaction force from the increasing braking groove and increases the load with respect to the advance operation of the latch bolt. Also, the play of the latch bolt is reduced by the reaction force from the braking groove, and the generation of noise (rattle noise) is suppressed. As a result, it is possible to reduce operating noise and obtain high silence.

According to the silencer structure of the latch bolt according to claim 2, since the latch bolt, the inner wall of the lock box, and the urging member are made of resin, the generation of contact noise can be suppressed as compared with a structure in which metal members are brought into contact with each other. . Moreover, abrasion of the resin member when one member is made of metal can be suppressed. Furthermore, the latch bolt and the inner wall can be easily processed in a complicated shape.

  According to the silencer structure of the latch bolt according to claim 3, a protrusion is protruded from the latch bolt in the direction of advancing and retreating, and an impact absorbing member that hits this protrusion is provided inside the lock box immediately before completion of the advancement of the latch bolt. Therefore, immediately before the latch bolt hits the stopper or the like at the advance completion position, it hits the impact absorbing member and elastically deforms the impact absorbing member, so that the impact load generated at the time of stop is absorbed and the generation of impact sound is suppressed. The

  According to the silencer structure of the latch bolt according to claim 4, the latch bolt is formed with a seat plate portion in an advancing and retreating orthogonal direction, and the cushion rib that hits the seat plate portion is projected from the inner wall of the lock box at a position immediately before the latch bolt is advanced. As a result, the impact load is absorbed by the elastic deformation of the cushion rib, and the impact sound is less likely to be generated, in cooperation with the impact absorbing action when the impact absorbing member is stopped.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a latch bolt silencing structure according to the invention will be described in detail with reference to the drawings.
FIG. 1 is an external perspective view of a door having a silencing structure according to the present invention, FIG. 2 is a side view of the lock box shown in FIG. 1, and FIG. 3 is a view of the lock box shown in FIG. It is a perspective view.
A lock box 3 is provided on the open / close end side of the door 1. A front decorative plate 7 is attached to the mouth 5 of the door 1. The lock box 3 is formed as a flat hexahedron, and is accommodated with both side surfaces parallel to the front and back surfaces of the door. The lock box 3 has a case 9 shown in FIG. 3 on one side surface and a lid 11 for closing the side surface opening of the case 9.

  The lock box 3 is inserted into the accommodation space formed in the door 1 from the end 5 and fixed to the end 5 by the back plate 13 at the rear end of the insertion. The back plate 13 is covered with the front decorative plate 7 attached to the surface. In the present embodiment, the structure in which the lock box 3 is installed in the door 1 will be described as an example. However, in the silencing structure of the latch bolt according to the present invention, the lock box 3 is attached to the surface of the door 1. Of course, it may be a surface-lock type.

A rotating shaft 15 whose axis is perpendicular to the door surface is rotatably accommodated in the lower portion of the lock box 3, and the rotating shaft 15 has a square hole 17 coaxially. The rotation of the rotation shaft 15 is restricted by stoppers (not shown) at both ends in the rotation direction, and can be rotated from one end of rotation shown in FIG. 2 to the other end of rotation at a predetermined angle in the clockwise direction. For example, a square shaft 21 of a lever handle 19 shown in FIG. A cam plate 23 protruding outward in the radial direction is fixed to the outer periphery of the rotating shaft 15 and stands up in FIG. 2 in the present embodiment.

  A protrusion 25 is formed on the outer periphery of the rotating shaft 15 on the opposite side of the cam plate 23 across the axis. A release block 27 is accommodated in the lower part of the case 9, and the release block 27 is movable in the vertical direction to the door mouth 5 by engaging the guide projection 29 on the side surface with the guide long hole 31 of the lid 11. A release spring 33 is disposed between the release block 27 and the back plate 13, and the release spring 33 biases the release block 27 in a direction away from the back plate 13. In the release block 27 urged by the release spring 33, the projection 35 hits the shaft frame 37 and the further movement is restricted. The protrusion 25 of the rotating shaft 15 is in contact with the tip of the release block 27 that contacts the shaft frame 37.

  Therefore, when the lever handle 19 is operated in the direction a in FIG. 1 and the pivot shaft 15 is rotated in the clockwise direction in FIG. 2, the protrusion 25 is made to move the release block 27 against the urging force of the release spring 33. Move to the left in the figure. When the lever handle 19 is released, the release block 27 moved to the left is moved to the right by the restoring force of the release spring 33. Accordingly, the rotation shaft 15 is rotated to the original position ( That is, it is rotated back to the initial position.

4 is a cross-sectional view taken along the line A-A with the latch bolt of FIG. 2 retracted, FIG. 5 is an exploded perspective view of the latch bolt shown in FIG. 4, and FIG. 6 is a cross-sectional view taken along line BB of FIG.
A bolt guide space 41 is formed in the lock box 3 above the shaft frame 37. The bolt guide space 41 is formed between the facing inner walls 43 and 45 of the lock box 3 and accommodates the latch bolt 47 so as to be able to advance and retreat. The inner walls 43 and 45 are formed by the side walls of the case 9 and the lid 11. The bolt guide space 41 is opened at the end 5 through opening holes 7 a and 13 a formed in the back plate 13 and the front decorative plate 7. As a result, the latch bolt 47 is movably installed in the lock box 3 fixed to the door 1, and advances from the end 5.

  The latch bolt 47 includes a latch front end portion 49 and a latch base end portion 51. The latch front end portion 49 includes a head portion 55 having an inclined surface 53, a shaft portion 57 connected to the rear of the head portion 55, and a fitting portion 59 connected to the rear portion of the shaft portion 57. The latch base end portion 51 includes a fitting recess 61 that fits with the fitting portion 59 of the latch front end portion 49, and a substrate portion 63 that is connected to the rear of the fitting recess 61.

  The fitting portion 59 of the latch front end portion 49 includes a columnar small diameter portion 65 and a columnar large diameter portion 67 connected to the rear thereof. The fitting recess 61 has a stepped portion 69 that fits the large-diameter portion 67 and regulates the detachment of the latch tip 49 in the axial direction. The latch distal end portion 49 is connected to the latch base end portion 51 by inserting the large diameter portion 67 into the fitting recess 61 from the direction orthogonal to the axis. A pair of parallel ridges 71, 71 are formed in the vertical direction on the inner wall of the fitting recess 61, and the ridges 71, 71 are crushed by the rear end face of the large-diameter portion 67 fitted into the stepped portion 69 and elastically deformed. To do. Thereby, the latch front-end | tip part 49 and the latch base end part 51 are integrally connected without rattling.

  A plurality of guide protrusions 73 (see FIG. 4) are provided on the side surface of the latch base end portion 51, and these guide protrusions 73 are engaged with guide long holes 75 formed in the case 9 and the lid 11. The latch bolt 47 is movably supported in a direction in which it can advance and retreat from the opening holes 7a and 13a.

  An advancing spring 79 is disposed between the case rear wall 77 of the lock box 3 and the rear end surface 51a of the latch base end portion 51, and the advancing spring 79 biases the latch bolt 47 in the advancing direction. The latch bolt 47 is urged by the advancing spring 79, so that the latch front end portion 49 protrudes from the mouthpiece 5.

  An engagement protrusion 81 (see FIG. 5) is provided on one side surface of the latch base end portion 51, and the engagement protrusion 81 engages with the standing cam plate 23. Accordingly, when the lever handle 19 is rotated in the direction a of FIG. 1 from the state shown in FIG. 2, the cam plate 23 rotates clockwise in FIG. Retreated against 79 forces. At this time, the release block 27 is also moved to the left in FIG. 2 against the urging force of the release spring 33. That is, the rotation shaft 15 that has been rotated is returned to the position before the rotation by the restoring force of both the advance spring 79 and the release spring 33.

  Here, for example, when the lever handle 19 is not operated and the door is closed, the inclined surface 53 of the latch bolt 47 hits the edge of a strike plate (not shown) and receives a reaction force from the edge, so that the latch bolt 47 is locked. It is pushed into the box 3. At this time, the engaging protrusion 81 of the latch bolt 47 moves away from the cam plate 23 without engaging with the cam plate 23. That is, when the latch bolt 47 is retracted, the rotating shaft 15 is not rotated.

  A base end of a bias spring 83 which is a biasing member bent in a Z shape is fixed to the base plate portion 63 of the latch base end portion 51 with a screw 85. The bias spring 83 is provided so as to protrude from one side surface of the latch base end portion 51 and can be elastically deformed in the bolt thickness direction D.

  A brake groove 87 is formed in the inner wall 45 of the lid 11 facing one side surface of the latch base end portion 51, and the brake groove 87 receives the biased spring 83 and becomes gradually shallower in the advance direction of the latch bolt 47. It comes into contact with the unilateral spring 83. That is, the bottom surface of the braking groove 87 becomes a tapered surface 89 that gradually approaches the substrate portion 63. As the latch bolt 47 moves forward, the reaction force from the braking groove 87 acting on the bias spring 83 increases. Due to this reaction force, the bias spring 83 is elastically deformed in a direction approaching the substrate portion 63.

  In the present embodiment, the latch bolt 47, the inner walls 43, 45, and the bias spring 83 are made of a resin material such as nylon. Compared with a structure in which metal members having high rigidity are in contact with each other, resin members having low rigidity are in contact with each other, so that a contact sound is hardly generated. Further, when one member is made of metal, wear of the resin member is difficult to occur. Further, the latch bolt 47, the inner walls 43, 45, and the bias spring 83 can be processed in a complicated shape.

  In particular, as the low friction resin used for the one-way spring 83, urethane, polyethylene, polyvinyl chloride or the like can be used in addition to the above-mentioned nylon. In addition, as the wear-resistant resin, Teflon (registered trademark), tetrafluoroethylene resin, fluororesin, or the like can be used.

  A vertical wall 91 shown in FIGS. 3 and 7 is formed at the lower front portion of the bolt guide space 41 in the case 9, and a cushion material 93 made of rubber or the like as an impact absorbing member is attached to the rear surface of the vertical wall 91. On the other hand, a protrusion 95 protrudes in the forward / backward orthogonal direction on the lower surface of the latch base end portion 51. The protrusion 95 hits the cushion material 93 at a position immediately before completion of the advancement of the latch bolt 47. By providing the cushioning material 93 on the vertical wall 91, the impact load is absorbed by the cushioning material 93 being elastically deformed by hitting the cushioning material 93 just before the latch bolt 47 hits the stopper or the like at the advanced position. Thereby, the impact load generated at the time of stop is absorbed, and the generation of impact sound is suppressed.

  Further, the base plate portion 63 of the latch base end portion 51 is formed with a seat plate portion 97 shown in FIG. A pair of cushion ribs 99 protrude from the lid 11 which is the inner wall of the lock box 3, and the cushion ribs 99 abut against the seat plate portion 97 at a position immediately before the advancement of the latch bolt 47. By providing the seat plate portion 97 and the cushion rib 99, the impact load is absorbed by the elastic deformation of the cushion rib 99 in cooperation with the impact absorbing action at the time of stopping by the cushion material 93 described above, and the impact sound is generated. It is harder to occur.

  In addition, the guide square tube 101 shown in FIG. 4 is attached to the opening hole 13a of the back plate 13 shown in FIG. The guide rectangular tube 101 is made of a resin material, and guides the latch tip 49 with low friction on the inner wall surface.

Next, the operation of the silencer structure of the latch bolt having the above configuration will be described.
7 is a cross-sectional view taken along line AA in FIG.
As shown in FIG. 1, the latch bolt 47 projects from the mouthpiece 5 by the bias of the advance spring 79 when the door is opened and when the door is closed. When the lever handle 19 is rotated in the direction a in FIG. 1, the latch bolt 47 is retracted against the urging force of the advance spring 79 via the engagement protrusion 81. When the door is closed and the lever handle 19 is held and returned to the direction opposite to the direction a, the rotational shaft 15 that has been rotated is rotated by the restoring force of both the advance spring 79 and the release spring 33 before the rotation. At the same time, the latch bolt 47 returns to the protruding state. In the protruding latch bolt 47, the latch tip 49 enters a strike hole (not shown) and temporarily tightens the door 1.

  At this time, the latch bolt 47 moving forwards and backwards gradually comes into sliding contact with the taper surface 89 of the braking groove 87 as the squeezing spring 83 advances and moves toward one side of the bolt guide space 41, and rattling noise is suppressed.

  When the lever handle 19 is closed without being rotated in the direction a in FIG. 1, the inclined surface 53 of the latch bolt 47 hits the edge of a strike plate (not shown) and receives a reaction force from the edge. The latch bolt 47 is pushed into the lock box 3. At this time, the engaging projection 81 of the latch bolt 47 is detached from the cam plate 23, and the rotating shaft 15, that is, the lever handle 19 is not rotated.

  When the closing of the door is completed, the latch bolt 47 is aligned with the strike hole, and the latch bolt 47 is advanced again by the urging force of the advance spring 79, so that the door 1 is temporarily tightened. At this time, when the latch bolt 47 moves in the advancing direction due to the urging force of the advancing spring 79, the one-sided spring 83 gradually contacts the tapered surface 89 of the braking groove 87. When the biased spring 83 gradually contacts the tapered surface 89, the reaction force from the tapered surface 89 increases, and the biased spring 83 is elastically deformed. Thereby, a load increases with respect to the advance operation of the latch bolt 47, and this increased load serves as a braking force for the advance operation, and the latch bolt 47 is decelerated. Further, the latch bolt 47 is offset in the bolt guide space 41 by the reaction force from the tapered surface 89, and play (gap) is reduced.

  Therefore, according to the silencer structure of the latch bolt according to the present embodiment, the biased spring 83 that is elastically deformable in the bolt thickness direction D is provided so as to protrude from one side surface of the latch bolt 47, and the one side surface of the latch bolt 47 is faced. In the inner wall 45, the brake spring 87 is formed which receives the bias spring 83 and gradually becomes shallower toward the advance direction of the latch bolt 47 and comes into contact with the bias spring 83. Therefore, when the latch bolt 47 moves in the advance direction, the bias spring 83 is moved. Gradually contacts the braking groove 87, and the counter spring 83 is elastically deformed by the reaction force from the increasing braking groove 87, increasing the load against the advance operation of the latch bolt 47. In addition, the play of the latch bolt 47 is reduced by the reaction force from the braking groove 87, and the generation of noise (rattle noise) is suppressed. As a result, the operating sound can be greatly reduced, and high silence can be obtained.

  In the above-described embodiment, an example in which the lock box 3 is made of a resin material has been described. However, in the silencer structure of the latch bolt of the present invention, the lock box 3 is not limited to resin, but is made of metal or resin. It is good also as a combined structure of a member and a metal member. Examples of the combination structure include a case 9 made of metal and a lid 11 made of resin, or a structure in which a resin material is lined on the inner surface of the metal case 9 and lid 11.

It is an external appearance perspective view of the door provided with the sound deadening structure concerning the present invention. It is the side view which saw through the inside of the lock box shown in FIG. It is the perspective view which removed the lid | cover of the lock box shown in FIG. It is AA sectional drawing of the state which the latch bolt of FIG. 2 retracted. FIG. 5 is an exploded perspective view of the latch bolt shown in FIG. 4. It is BB sectional drawing of FIG. It is AA sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Door 3 ... Lock box 5 ... Door end 41 ... Bolt guide space 47 ... Latch bolt 43,45 ... Inner wall which a lock box faces 83 ... Energizing member (one side spring)
87: Braking groove 93 ... Shock absorbing member (cushion material)
95 ... Projection 97 ... Seat plate 99 ... Cushion rib D ... Bolt thickness direction

Claims (4)

A silencer structure of a latch bolt that is movably installed in a lock box fixed to the door and advanced from the mouth of the door,
A bolt guide space that is formed between the facing inner walls of the lock box and accommodates the latch bolt so as to freely advance and retract;
A biasing member that protrudes from one side surface of the latch bolt and is elastically deformable in the bolt thickness direction;
A braking groove formed on the inner wall facing one side surface of the latch bolt, receiving the biasing member, gradually becoming shallower toward the advance direction of the latch bolt, and contacting the biasing member;
A silencer structure for a latch bolt, comprising: It is a silencer structure of the latch bolt according to claim 1,
The silencer structure of a latch bolt, wherein the latch bolt, the inner wall of the lock box, and the urging member are made of resin. The silencer structure of the latch bolt according to claim 1 or 2,
A protrusion protruding from the latch bolt in a forward / backward orthogonal direction;
An impact absorbing member which is provided inside the lock box and hits the protrusion at a position immediately before completion of advancement of the latch bolt;
A silencer structure for a latch bolt, comprising: A silencing structure for a latch bolt according to any one of claims 1, 2, and 3,
A seat plate portion formed in the latch bolt in an advancing and retreating orthogonal direction;
A cushion rib that protrudes from the inner wall of the lock box and hits the seat plate at a position immediately before completion of advancement of the latch bolt;
A silencer structure for a latch bolt, comprising:

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