JP2005127044A - Opening promotion lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening promotion lock capable of eliminating differential pressure (difference in atmospheric pressure) between the inside and the outside of a room without providing a window hole and an opening and closing plate and opening a door being difficult to open due to difference in atmospheric pressure easily without reducing beauty of appearance, airtightness, crime prevention property, and safety. <P>SOLUTION: This opening promotion lock is provided with a latch bolt advancing and retracting from a door opening and closing end 19 on the opposite side to a hoisting origin, an operation shaft making the latch bolt advance and retract, and a strike plate 33 which is provided in a door frame 11 and in which the latch bolt advances to assist opening movement of the door 13 from a condition in which the door 13 is in a closed condition and the latch bolt escapes from the strike plate 33. This lock is provided with a reaction force member 39 provided in the door frame 11, a forcibly opening latch 83 provided to advance and retract from the door opening and closing end 19 and is abutted on the reaction force member 39 by advance movement to pry the door 13 in the direction of opening, and a prizing cam fixed to the operation shaft and makes the forcibly opening latch 83 advance and move by rotation operation of the operation shaft after retracting the latch bolt. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an opening assisting lock that is provided, for example, at an entrance of an apartment or an airtight room door and assists the opening of the door against a pressure difference (atmospheric pressure difference) generated inside and outside the room.

  For example, in a condominium or a highly airtight house, when the ventilation fan is operated in a sealed state, the atmospheric pressure in the room is lower than the outside, and a large force is required to open the entrance door. Under such circumstances, it is difficult to open the door particularly in the case of a child or an elderly person with small opening power.

  On the other hand, the following patent document 1 and patent document 2 have been proposed to eliminate the pressure difference generated indoors and outdoors and to realize smooth opening of the door.

The lock lock interlocking gallery disclosed in Patent Document 1 is provided with a small ventilation door in the door, opens and closes the ventilation door in conjunction with the door opening and closing operation of the lock lock handle, and eliminates the negative pressure in the room when the door is closed, The door can be opened smoothly.
Further, the indoor / outdoor air pressure difference canceling device for a door of a building or the like disclosed in Patent Document 2 can be used for the indoor / outdoor air pressure difference canceling window hole corresponding to the movement of the lifting / lowering rod on the lock side when the operation handle of the lock is operated. The opening / closing plate moves to quickly eliminate the pressure difference between the inside and outside of the room.
Japanese Examined Patent Publication No. 4-66988 JP 11-324519 A

  However, the above-described conventional indoor / outdoor air pressure difference elimination structure has a drawback of reducing airtightness and appearance of the door because a window hole must be provided in the door. In addition, the door must be provided with an open / close plate that opens and closes the window hole, and an interlocking device such as a lifting bar that operates the open / close plate in conjunction with the operation of the operation handle, which complicates the mechanism and allows easy installation. However, there was a disadvantage that the cost increased. Furthermore, if the door is provided with a window hole, there is a possibility that the crime prevention performance against the thumb turn which has been increasing rapidly in recent years may be lowered. Moreover, it is not preferable from the viewpoint of safety that the opening / closing plate for opening and closing the window hole may be pinched by fingers.

  The present invention has been made in view of the above situation, and provides an opening assisting lock capable of eliminating the pressure difference between the inside and outside of the room without providing a window hole or an opening / closing plate, and thus, looks, airtightness, crime prevention and safety. The purpose is to easily open the door which is difficult to open due to negative pressure without lowering the pressure.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The opening assisting lock 100 according to claim 1 of the present invention is provided on the door frame 11 with a latch bolt 65 that moves forward and backward from the door opening / closing end 19 on the side opposite to the suspension base, an operation shaft 79 that moves the latch bolt 65 forward and backward. An opening assisting lock 100 for assisting the opening of the door 13 from a state in which the door 13 is in a closed state and the latch bolt 65 is detached from the strike plate 33. ,
A reaction force member 39 provided on the door frame 11;
A peg opening latch 83 which is provided so as to be able to advance and retreat from the door opening / closing end 19 and abuts against the reaction force member 39 by advancing movement to pry the door 13 in the opening direction;
A pry-off cam 81 which is fixed to the operation shaft 79 and moves the pry-out latch 83 forward by a rotation operation of the operation shaft 79 after the latch bolt 65 is moved backward;
It is characterized by comprising.

  In the opening assisting lock 100, when the operation shaft 79 is rotated and the latch bolt 65 is removed from the strike plate 33, the pry opening latch 83 is advanced by the pry opening cam 81 by the series of rotation operations, and the advanced pry opening latch 83 is moved to the door frame. The reaction force which abuts the 11 reaction force member 39 and pry the door 13 in the opening direction is generated. By this opening, a gap is generated between the door opening / closing end 19 of the door 13 and the entire periphery and the door frame 11. For example, when the door 13 is opened in the outdoor direction and the room has a negative pressure, the negative pressure in the room disappears. Even if the door 13 has a negative pressure in the room and requires a large force to open, the door 13 can be easily opened. Further, the components can be accommodated in the lock box 21. Further, since the pry opening latch 83 operates between the door mouth and the door frame 11, the sliding contact portion is not exposed to the outside.

The opening assisting lock 100 according to claim 2 is the opening assisting lock according to claim 1,
The prying latch 83 is advanced and retracted in the same direction as the latch bolt 65,
An inclined surface 103 is formed on the side of the door closing direction at the tip of the peg opening latch 83 so that the peg opening latch 83 gradually becomes thinner toward the tip.
The reaction force member 39 is formed with a corner portion 109 that is sandwiched between a surface 105 parallel to the advancing and retreating direction of the prying latch 83 and a surface 107 orthogonal to the parallel surface 105 and in sliding contact with the inclined surface 103. It is characterized by.

  In the opening assist lock 100, the pry opening latch 83 is advanced, and when the inclined surface 103 of the pry opening latch 83 is slidably contacted with the corner 109 of the reaction force member 39, the inclined surface 103 of the pry opening latch 83 is the corner of the reaction force member 39. A reaction force that squeezes the door 13 in the opening direction from 109 is received, and this reaction force becomes an assisting force in the door opening direction. That is, the opening assist force can be obtained as a component force from the moving operation in the same direction as the latch bolt 65.

The opening assisting lock 200 according to claim 3 is provided with a latch bolt 65 that moves forward and backward from the door opening / closing end 19 on the side opposite to the suspension base, an operation shaft 79 that moves the latch bolt 65 forward and backward, and the latch bolt provided on the door frame 11. An opening assisting lock 200 for assisting the opening of the door 13 from a state in which the door 13 is in a closed state and the latch bolt 65 is detached from the strike plate 33;
A reaction force member 121 provided on the door frame 11,
After the latch bolt 65 is retracted and fixed to the operation shaft 79 in the radially outward direction, the operation shaft 79 is rotated to come into contact with the reaction force member 121 to pry the door 13 in the opening direction. When,
It is characterized by comprising.

  In the opening assisting lock 200, when the operation shaft 79 is rotated and the latch bolt 65 is removed from the strike plate 33, the revolving force 123 comes into contact with the reaction force member 121 of the door frame 11 by the series of rotation operations, and the door 13 A reaction force is generated to pry up in the opening direction. This opening causes a gap from the door opening / closing end 19 of the door 13 of the door 13 to the entire periphery and the door frame 11. For example, when the door 13 is opened in the outdoor direction and the room has a negative pressure, Even if the door 13 has no pressure and has a negative pressure in the room and requires a large force to open, the door 13 can be easily opened. Further, the constituent members are provided outside the operation shaft 79, and the lock box structure is simplified.

  In the opening assisting lock 200 according to claim 4, a rotatable roller 143 is coaxially provided on the prying bar 123, and the prying bar 123 contacts the reaction force member 121 while rolling the roller 143. It is characterized by.

  In the opening assisting lock 200, when the operation shaft 79 is further rotated after the pry opening lever 123 comes into contact with the reaction force member 121, and the pry opening lever 123 is slidably contacted with the reaction force member 121, the roller 143 is moved to the reaction force member. The frictional force at the time of contact between the prying bar 123 and the reaction force member 121 becomes small while rolling 121.

  The opening assisting lock according to claim 5 is the opening assisting lock according to any one of claims 1, 2, 3, and 4, wherein the reaction force members 39, 121 are provided on the strike plate 33. It is comprised in the part and is provided in the said door frame 11. It is characterized by the above-mentioned.

  In the opening assisting lock, the reaction force members 39 and 121 can be substantially integrated with the strike plate 33, and can be easily attached to the door frame 11 side.

  According to the opening assisting lock of claim 1 according to the present invention, the door frame is provided with a reaction force member, and the door opening / closing end is provided with a peg opening latch that abuts against the reaction force member by advancing movement to pry the door in the opening direction, Even if it is a door that has a negative pressure in the room and a large force is required for opening because the opening cam that moves the latch forward by moving the operating shaft after retracting the latch bolt is fixed to the operating shaft. When the operating shaft is rotated and the latch bolt comes out of the strike plate, a series of rotational operations causes the pry-out cam to pry out and the peg-opening latch abuts against the reaction force member of the door frame to open the door. Creates a reaction force that squeezes in the direction. This prying opens a gap between the entire peripheral edge of the door and the door frame, eliminating the negative pressure in the room. As a result, the door that is difficult to open due to the action of negative pressure can be easily opened by a series of opening operations that actuate the latch bolt without providing an opening window or the like that reduces airtightness and crime prevention. . Moreover, since a structural member can be stored in a lock box, while being easy to attach to a door, an appearance is not reduced. Furthermore, since the pry opening latch operates between the door mouth and the door frame, it is possible to ensure high safety without pinching fingers.

  According to the opening assisting lock of the second aspect, the inclined surface is formed at the tip of the open latch that is advanced and retracted in the same direction as the latch bolt, and the corner portion that is in sliding contact with the inclined surface is formed in the reaction member. When the pry opening latch is advanced and the inclined surface of the pry opening latch slides on the corner of the reaction force member, the peg opening latch receives a reaction force that squeezes the door in the opening direction from the reaction force member. Helping. Therefore, the assisting force generating mechanism can be configured in a simple and small space and without being exposed to the outside.

  According to the opening assist lock of claim 3, the reaction force member is provided on the door frame, and the door is opened in the opening direction by contacting the reaction force member by rotating the operation shaft after the latch bolt is retracted. Is fixed to the operating shaft, so even if the door has negative pressure and requires a large force to open, if the operating shaft is turned and the latch bolt comes off the strike plate, a series of rotation operations are performed. As a result, the prying hook comes into contact with the reaction force member of the door frame to generate a reaction force that pry the door in the opening direction. This prying opens a gap between the entire peripheral edge of the door and the door frame, eliminating the negative pressure in the room. As a result, the door that is difficult to open due to the action of negative pressure can be easily opened by a series of opening operations that actuate the latch bolt without providing an opening window or the like that reduces airtightness and crime prevention. . In addition, since the constituent members are provided outside the operation shaft, the lock box structure is simplified, the attachment to the door is facilitated, and the apparatus cost and the installation cost can be reduced.

  According to the opening assisting lock of the fourth aspect, since the roller that is in contact with the reaction force member while being rolled is provided on the retraction member so as to be rotatable, the operation shaft is further provided after the retraction operation member contacts the reaction force member. When the pry bar is rotated and slidably contacted with the reaction force member, the roller makes contact while rolling the reaction force member, so the frictional force at the time of contact decreases, and as a result, the pry force is rotated by a small rotation of the operating shaft. It can be obtained by operating force.

  According to the opening assisting lock of the fifth aspect, the reaction force member is configured to be substantially integrated with the strike plate, whereby the attachment to the door frame side can be facilitated, It is possible to easily set the arrangement position with the pry bar.

Hereinafter, preferred embodiments of an opening assisting lock according to the present invention will be described in detail with reference to the drawings.
First, a first embodiment of the opening assisting lock according to the present invention will be described.
FIG. 1 is a longitudinal sectional view of an opening assisting lock according to a first embodiment of the present invention, FIG. 2 is a front view of a strike plate, and FIG. 3 is a plan view showing a positional relationship between a latch bolt and a reaction force member. is there.

  A door frame 11 is provided at the entrance / exit opening, and the door frame 11 rotatably supports a base of the door 13. A door stop 15 is formed on the door frame 11, and the door stop 15 includes a gasket 17 that seals a gap with the door 13. Therefore, if the door 13 is a door that opens in the outdoor direction, the door 13 is pressed against the gasket 17 due to negative pressure on the indoor side.

  In the door 13, a lock box 21 is built in a door opening / closing end 19 on the side opposite to the suspension base. In the present embodiment, a case where the door 13 is an entrance door will be described as an example. Therefore, the lock box 21 is provided with a cylinder lock that exposes the keyhole on the outer surface of the door 13. The opening assisting lock according to the present invention may be provided on the indoor door, and in that case, the cylinder lock is not necessary.

  The lock box 21 is formed in a rectangular box shape, and a mounting plate 23 is fixed to a front end surface by a fixing member 25 such as a rivet. The lock box 21 is built in, and a mounting plate 23 is fixed to the end of the door opening / closing end 19 of the door 13 with screws 27. A front plate 29 is further covered on the surface of the mounting plate 23 fixed to the mouth end, and the front plate 29 is screwed to the lock box 21 by a fixing member 31 such as a screw.

  On the other hand, the strike plate 33 shown in FIG. 2 is attached to the door frame 11 by a fixing member 35 such as a screw. The strike plate 33 is provided with an engagement hole 37 into which a dead bolt 49 and a latch bolt 65, which will be described later, enter, and a reaction force member 39 with which the knurling latch 83 slides. The reaction force member 39 is screwed by a fixing member 43 such as a screw into a notch 41 having a U-shaped notch on one side of the strike plate 33 in the opening direction.

  On the rear end surface of the cylinder lock 45 disposed inside the lock box 21, an operating rod 47 that rotates by the operation of the key is protruded toward the outside of the rotation radius. The lock box 21 is provided with a dead bolt 49 below the cylinder lock 45, and the dead bolt 49 is engaged with a support pin 53 fixed to the lock box 21 in a horizontally long slot 51 so that the front plate 29 It is free to advance and retreat. A recess 55 is formed in the upper part of the dead bolt 49, and the dead bolt 49 is advanced and retracted by rotating the key by engaging the operating rod 47 with the recess 55.

  Inside the lock box 21, a lock plate 59 is swingably provided around the support pin 57 below the dead bolt 49, and the lock plate 59 is unlocked in the unlocking direction via a connecting rod 61 interlocking with the operating rod 47. Is swung. That is, the lock plate 59 is disposed so as to engage with the notch 63 of the dead bolt 49 and restrict the backward movement of the dead bolt 49 in a state where the operating rod 47 advances the dead bolt 49. This restriction is released by the connecting rod 61 when the operating rod 47 moves the dead bolt 49 in the backward direction.

  Inside the lock box 21, a latch bolt 65 that moves forward and backward in the same direction as the dead bolt 49 is provided below the dead bolt 49. The latch bolt 65 is urged by the compression spring 67 so that the tip portion protrudes from the front plate 29. In the present embodiment, the front end of the latch bolt 65 has a side surface (a side surface on the indoor side or a side surface in the closing direction of the door 13) facing the door stop 15 as an inclined surface 69. Therefore, when the door 13 is closed from the opened state of the door 13, the latch bolt 65 in the protruding state is abutted against the end of the strike plate 33 and retracted, and at the same time the door 13 is closed, the strike plate 33 is engaged. The hole 37 is entered and the door 13 is kept closed.

  A trapezoidal member 71 having a curved inclined surface on the lower side is fixed to the rear end portion of the latch bolt 65. The latch bolt 65 is retracted by a later-described prying cam 81 through the trapezoidal member 71.

  Inside the lock box 21, a support pin 73 is provided below the latch bolt 65, and a latch restricting plate 75 is swingably supported by the support pin 73. The latch regulating plate 75 is connected to the dead bolt 49 on the opposite side to the support pin 73 via a rotation pin 77. When the dead bolt 49 is advanced, the abutment surface 75a abuts against the rear surface of the front end of the latch bolt 65. It works to regulate the retraction of the bolt 65. That is, in a state where the dead bolt 49 protrudes, the latch bolt 65 cannot be retracted and protrudes.

  A rotatable operating shaft 79 is passed through the lock box 21 below the latch bolt 65. At both ends of the operation shaft 79 penetrating the lock box 21, lever handles or knobs are fixed on the outdoor side surface and the indoor side surface of the door 13. That is, the operation shaft 79 is rotated by a rotation operation of a lever handle or the like. A pry cam 81 is fixed to the operation shaft 79 in the lock box 21.

  Inside the lock box 21, a peg opening latch 83 that moves forward and backward in the same direction as the dead bolt 49 is provided below the operation shaft 79. A support bolt 85 extends from the rear of the peg opening latch 83, and this support bolt 85 is slidably supported by a U-shaped support plate 87 fixed to the lock box 21. A seat plate 89 is fixed to the rear end of the support bolt 85, and a compression spring 91 is externally inserted into the support bolt 85 between the seat plate 89 and the support plate 87. The compression spring 91 urges the seat plate 89 in the direction away from the support plate 87, thereby retreating the peg opening latch 83 into the lock box 21.

  The peg opening cam 81 is provided with an engaging projection 93 that engages with the trapezoidal member 71 and a pressing portion 95 that advances the peg opening latch 83 so as to protrude outward in the rotational radius. One end of the pegging cam 81 is hooked on a support pin 97 erected on the lock box 21 and the other end is hooked on a hooking piece 99 formed on the pegging cam 81. The cam 81 is urged counterclockwise in FIG. As will be described in detail in the description of the operation described later, the prying cam 81 rotates clockwise, thereby moving the trapezoidal member 71 in the right direction in FIG. 1 and retracting the latch bolt 65. Further, the seat plate 89 is pressed by the pressing portion 95.

  An inclined surface 103 is formed on the side surface on the door closing direction side at the front end portion of the pry opening latch 83. This inclined surface 103 becomes an inclined surface that gradually pricks the open latch 83 toward the tip.

  The reaction force member 39 attached to the strike plate 33 is sandwiched between a surface 105 parallel to the advancing and retreating direction of the prying latch 83 and a surface 107 orthogonal to the parallel surface 105, and a corner portion 109 in sliding contact with the inclined surface 103. have. The corner portion 109 of the reaction force member 39 is brought into sliding contact with the inclined surface 103 by the advancement of the prying latch 83. The surface of the corner 109 is preferably a curved surface.

  Therefore, when the peg opening latch 83 is advanced and the inclined surface 103 of the peg opening latch 83 is in sliding contact with the corner 109 of the reaction force member 39, the inclined surface 103 of the peg opening latch 83 moves the door 13 from the corner 109 of the reaction force member 39. In response to the reaction force squeezing in the opening direction, this reaction force becomes an assisting force in the direction of opening the door 13 (door opening direction). That is, the opening assist force can be obtained as a component force from the moving operation in the same direction as the latch bolt 65. For this reason, the mechanism for generating the assisting force is configured in a simple and small space and without being exposed to the outside.

The operation of the opening assisting lock 100 configured as described above will be described.
FIG. 4 is a diagram for explaining the operation when the latch bolt is advanced according to the first embodiment, FIG. 5 is a diagram for explaining the operation when the latch bolt is retracted according to the first embodiment, and FIG. 6 is a peg opening latch according to the first embodiment. FIG. 7 is a plan view of the door opening / closing end that has been pry open by advancing the pry opening latch.
When the cylinder lock 45 is in the locked state in the lock box 21, the dead bolt 49 is advanced, and the latch restricting plate 75 prevents the latch bolt 65 from retreating (see the state in FIG. 1). As a result, as shown in FIG. 4, the prying cam 81 in which the engagement protrusion 93 is brought into contact with the trapezoidal member 71 of the latch bolt 65 becomes non-rotatable, and the lever handle fixed to the operation shaft 79 cannot be rotated. It becomes.

  When the cylinder lock 45 is unlocked by the key lock, the dead bolt 49 is retracted into the lock box 21 and the restriction to the latch bolt 65 by the latch restriction plate 75 is released. That is, the operation shaft 79 can be rotated.

  When the lever handle is rotated in the direction in which the latch bolt 65 is moved backward in this state, the operation shaft 79 is rotated clockwise as shown in FIG. 5, and the engaging projection 93 of the pry cam 81 is brought into contact with the trapezoidal member 71. Then, the latch bolt 65 is retracted into the lock box 21.

  Simultaneously with the completion of the retraction of the latch bolt 65, the pressing portion 95 comes into contact with the seat plate 89 of the open latch 83. When the operation shaft 79 is further rotated clockwise from this state, as shown in FIG. 6, the pressing portion 95 presses the seat plate 89, and the peg opening latch 83 is protruded from the front plate 29. At this time, while the curved surface 71a of the trapezoidal member 71 is pressed against the edge 93a of the engaging protrusion 93, the latch bolt 65 is brought into a sliding contact state between the curved surface 71a and the end surface of the engaging protrusion 93, and is held in the retracted state.

  When the pry-out latch 83 is advanced, the inclined surface 103 comes into contact with the corner portion 109 of the reaction force member 39 as shown in FIG. When the inclined surface 103 of the peg opening latch 83 is in sliding contact with the corner portion 109 of the reaction force member 39, the inclined surface 103 of the peg opening latch 83 receives a reaction force that pry the door 13 in the opening direction from the corner portion 109. Helps in the opening direction. Thereby, the door 13 is pry open and the door 13 is separated from the gasket 17. As a result, a gap S is created between the door opening / closing end 19 of the door 13 and the entire periphery of the door 13 and the door frame 11, the indoor and outdoor ventilation is performed, the negative pressure on the indoor side is eliminated, and the indoor is opened with a negative pressure. Even if the door 13 requires a large force, it can be easily opened.

  According to the opening assisting lock 100, the door frame 11 is provided with the reaction force member 39, and the door opening / closing end 19 is provided with the peg opening latch 83 that abuts against the reaction force member 39 by the advancing movement to pry the door 13 in the opening direction. Since the pry cam 81 that moves the peg opening latch 83 is moved forward by the rotation operation of the operation shaft 79 after the bolt 65 has been retracted is fixed to the operation shaft 79, the door has negative pressure and requires a large force to open. 13, when the operation shaft 79 is rotated and the latch bolt 65 is removed from the strike plate 33, the pry opening cam 81 advances the peg opening latch 83 by the series of rotation operations, and the advanced peg opening latch 83 moves into the door frame 11. The reaction force 39 is abutted against the reaction force member 39 to generate a reaction force that squeezes the door 13 in the opening direction. In other words, the closed state of the door 13 by the latch bolt 65 is released at the initial stage during the operation of rotating the operation shaft 79 in the opening operation of the door by a lever handle or the like. You will be prying open. By this opening, a gap S is generated between the entire periphery of the door 13 and the door frame 11, and the negative pressure in the room is eliminated. As a result, by providing a series of opening operations to operate the latch bolt 65 without providing an opening window or the like that lowers the airtightness and crime prevention property on the door 13, that is, by performing a very natural operation to open the door 13, The door 13 that has become difficult to open due to the negative pressure can be easily opened.

  Moreover, since a structural member can be stored in the lock box 21, while being easy to attach to the door 13, an appearance is not reduced.

  Furthermore, since the pry opening latch 83 operates between the door mouth and the door frame 11, it is possible to ensure high safety without pinching fingers.

  In the above-described embodiment, the example in which the inclined surface 103 is formed in the pry opening latch 83 and the reaction member 39 has the corner 109 and the peg opening is performed by sliding contact with each other has been described. Further, a roller member or the like may be provided at the position of the corner 109 of the reaction force member 39 so as to roll by contact with the inclined surface 103 of the pry opening latch 83 to guide it. It is also possible to provide a configuration in which a roller is provided on the reaction force member 39 and an inclined surface is formed on the reaction force member 39 so that the roller at the tip of the reaction force member 39 rolls on the inclination surface of the reaction force member in accordance with the advancing movement of the prying latch 39.

Next, a second embodiment of the opening assisting lock according to the present invention will be described.
8 is a front view of the opening assisting lock according to the second embodiment of the present invention, FIG. 9 is a plan view of the opening assisting lock shown in FIG. 8, and FIG. 10 is a door end of the opening assisting lock shown in FIG. FIG. 11 is a vertical sectional view of the lock box of the opening assisting lock shown in FIG. In addition, the same code | symbol is attached | subjected to the member and site | part same as the member and site | part shown in FIGS. 1-7, and the overlapping description shall be abbreviate | omitted.

  The opening assisting lock 200 according to the second embodiment includes a reaction force member 121 provided on the door frame 11 and an operation shaft after the latch bolt 65 is retracted and fixed to the operation shaft 79 so as to protrude radially outward. A peg opening bar 123 that abuts against the reaction force member 121 by the rotation operation 79 and pegs the door 13 in the opening direction is provided. Therefore, the difference from the opening assisting lock 100 of the first embodiment is that it does not have the pry opening latch 83, the pry opening cam 81, the pry opening lever 123, and the reaction member 121. The shape is different.

  For this reason, the lock box 125 shown in FIG. 11 used in the present embodiment omits the peg opening latch 83 and the peg opening cam 81 from the lock box 21 of the first embodiment, and newly adds a latch bolt retraction cam 127. It is comprised by providing. Here, the latch bolt retracting cam 127 has a shape in which only the pressing portion 95 is omitted from the pry opening cam 81, and other functions are the same as the pry opening cam 81. In FIG. 8, reference numeral 129 denotes a thumb turn that allows the dead bolt 49 to move forward and backward by a rotating operation, and 131 denotes a lever.

  As shown in FIG. 8, the reaction force member 121 is formed in a mountain shape having two inclined surfaces 133 and 135 when viewed from the front. As shown in FIG. 10, a chevron-shaped convex portion 141 having two inclined surfaces 137 and 139 is formed on the back side of the surfaces 133 and 135, which is a surface facing the outdoors. Accordingly, when the operation shaft 79 is rotated clockwise in FIG. 8 and the pry bar ridge 123 rides on the convex portion 141 of the reaction member 121, an assisting force in the door opening direction acts on the door 13 via the operation shaft 79. It is like that.

  It is preferable to attach a cap or the like of a low friction material to the tip of the prying bar 123. Further, the pry bar 123 may be provided with a rotatable roller 143 coaxially. In the configuration including such a roller 143, the prying bar 123 contacts the convex portion 141 of the reaction force member 121 while rolling the roller 143. As a result, after the prying bar 123 comes into contact with the reaction force member 121, when the operation shaft 79 is further rotated and the peg opening bar 123 is slidably contacted with the reaction force member 121, the rollers 143 are inclined surfaces of the reaction force member 121. , The frictional force at the time of contact is reduced, and as a result, a pry-off force can be obtained by a small rotational operating force of the operating shaft 79.

The operation of the opening assisting lock 200 configured as described above will be described.
FIG. 12 is a diagram for explaining the operation when the latch bolt is advanced according to the second embodiment, FIG. 13 is a diagram for explaining the operation when the latch bolt is retracted according to the second embodiment, and FIG. FIG. 15 is a diagram for explaining the operation in plan view when the second embodiment is pry open.

  When the operation shaft 79 is rotated in the direction in which the latch bolt 65 is retracted by the lever 131 in a state where the cylinder lock 45 is unlocked by the key and the dead bolt 49 is retracted into the lock box 21, as shown in FIG. Then, the operating shaft 79 is rotated clockwise, the engaging projection 93 of the latch bolt retracting cam 127 comes into contact with the trapezoidal member 71, and the latch bolt 65 is retracted into the lock box 121.

  Simultaneously with the completion of the retraction of the latch bolt 65 shown in FIG. 13, the roller 143 of the prying bar 123 comes into contact with the inclined surface 139 of the convex portion 141. When the operation shaft 79 is further rotated clockwise in the figure from this state, the roller 143 rides on the convex portion 141. At this time, as shown in FIG. 14, the latch bolt 65 is held in the retracted state while the curved surface 71 a of the trapezoidal member 71 is pressed against the edge 93 a of the engagement protrusion 93.

  As the roller 143 rides on the convex portion 141 in this way, the prying bar 123 receives a reaction force that pricks the door 13 in the opening direction from the reaction force member 121, and this reaction force becomes an assisting force in the door opening direction. Thereby, the door 13 is pry open and the door 13 is separated from the gasket 17. As a result, as shown in FIG. 15, a gap S is generated between the door opening / closing end 19 of the door 13 and the entire periphery and the door frame 11. Even the door 13 that has a negative pressure and requires a large force to open can be easily opened.

  According to the opening assisting lock 200, the reaction force member 121 is provided on the door frame 11, and the door 13 is opened in the opening direction by contacting the reaction force member 121 by the rotation operation of the operation shaft 79 after the latch bolt 65 is retracted. Since the prying lever 123 is fixed to the operation shaft 79, the operation shaft 79 is rotated and the latch bolt 65 is moved to the strike plate 33 even if the door 13 has a negative pressure in the room and requires a large force to open. When it comes off, the prying bar 123 comes into contact with the reaction force member 121 of the door frame 11 by the series of rotation operations, and generates a reaction force that pry the door 13 in the opening direction. By this opening, a gap is created between the entire periphery of the door 13 and the door frame 11, and the negative pressure in the room is eliminated. As a result, the door 13 that is difficult to open due to the action of negative pressure is easily opened by a series of opening operations that actuate the latch bolt 65 without providing an opening window or the like that lowers the airtightness and crime prevention in the door 13. be able to.

  Further, since the constituent members are provided outside the operation shaft 79, the lock box structure is simplified, the attachment to the door 13 is facilitated, and the apparatus cost and the installation cost can be reduced.

It is a longitudinal cross-sectional view of the opening assistance lock by 1st Embodiment which concerns on this invention. It is a front view of a strike board. It is a top view showing the positional relationship between a latch bolt and a reaction force member. It is operation | movement explanatory drawing at the time of latch bolt advance of 1st Embodiment. It is operation | movement explanatory drawing at the time of latch bolt retreat of 1st Embodiment. It is operation | movement explanatory drawing at the time of the prying latch advance of 1st Embodiment. It is a top view of the door opening-and-closing end pruned by the advancement of a pry opening latch. It is a front view of the opening assistance lock by 2nd Embodiment which concerns on this invention. It is a top view of the opening assistance lock shown in FIG. It is the side view seen from the door mouth end of the opening assistance lock shown in FIG. It is a longitudinal cross-sectional view of the lock box of the opening assistance lock shown in FIG. It is operation | movement explanatory drawing at the time of latch bolt advance of 2nd Embodiment. It is operation | movement explanatory drawing at the time of latch bolt retraction of 2nd Embodiment. It is operation | movement explanatory drawing at the time of the prying opening of 2nd Embodiment. It is operation | movement explanatory drawing at the time of the prying opening of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Door frame 13 ... Door 19 ... Door open / close end 33 ... Strike board 39, 121 ... Reaction force member 65 ... Latch bolt 79 ... Operation shaft 81 ... Pry opening cam 83 ... Pry opening latch 100, 200 ... Opening assistance lock 103 ... Inclined surface 109 ... Corner 123 ... Peeling 143 ... Roller

Claims (5)

A latch bolt that advances and retreats from the door open / close end opposite to the suspension base, an operation shaft that advances and retreats the latch bolt, and a strike plate that is provided on the door frame and into which the latch bolt enters, and the door is in a closed state; An opening assisting lock that assists the opening of the door from the state where the latch bolt is detached from the strike plate,
A reaction force member provided on the door frame;
A peg opening latch that is provided so as to be able to advance and retreat from the door opening / closing end and abuts against the reaction force member by advancing movement and pry the door in the opening direction;
A pry cam that moves the peg open latch forward by rotating the operation shaft after the latch bolt is retracted and fixed to the operation shaft;
An opening assisting tablet characterized by comprising: The prying latch is advanced and retracted in the same direction as the latch bolt;
An inclined surface that gradually reduces the thickness of the peg opening latch toward the tip is formed on the side surface on the door closing direction side at the tip of the peg opening latch,
2. The reaction force member is formed with a corner portion which is sandwiched between a plane parallel to the advancing and retreating direction of the pry-out latch and a plane orthogonal to the parallel plane and which is in sliding contact with the inclined surface. Opening assisting lock as described. A latch bolt that advances and retreats from the door open / close end opposite to the suspension base, an operation shaft that advances and retreats the latch bolt, and a strike plate that is provided on the door frame and into which the latch bolt enters, and the door is in a closed state; An opening assisting lock that assists the opening of the door from the state where the latch bolt is detached from the strike plate,
A reaction force member provided on the door frame;
A prying barge that protrudes radially outward from the operation shaft and is fixed and abuts against the reaction force member by rotating the operation shaft after the latch bolt is retracted to pry the door in the opening direction;
An opening assisting tablet characterized by comprising:   4. The opening assisting lock according to claim 3, wherein a rotatable roller is coaxially provided on the prying bar and the prying bar contacts the reaction force member while rolling the roller.   The opening assisting lock according to any one of claims 1, 2, 3, and 4, wherein the reaction member is formed on a part of the strike plate and provided on the door frame.

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