JP5875890B2 - Opening-reducing tablet - Google Patents

Description

  The present invention relates to an opening force reducing lock that is provided on an airtight door such as a condominium entrance and assists the opening of the door against a pressure difference generated inside and outside the room.

In general, in buildings such as condominiums and highly airtight houses, when a ventilating fan is operated in a sealed state, the indoor atmospheric pressure becomes lower than the outside, and a large force is required to open the entrance door. For small children and the elderly, it is difficult to open the door.
Therefore, conventionally, various techniques have been proposed for eliminating the difference in atmospheric pressure generated inside and outside the room in order to enable smooth opening of the door.

  For example, the opening assisting lock described in Patent Document 1 is provided with a reaction force member provided on the door frame and a door opening / retracting end which is provided so as to freely move forward and backward, and abuts against the reaction force member by advancing movement to pry the door in the opening direction. It is equipped with a latch and a pry-off cam that moves the latch by advancing by rotating the operation shaft after the latch bolt is retracted and fixed to the operation shaft. When the latch bolt comes off the strike plate, it is advanced by the pry-off cam. The peg opening latch abuts against the reaction force member of the door frame, a gap is formed between the door and the door frame, and there is no pressure difference between the inside and the outside, so that the opening can be easily performed.

JP 2005-127044 A

  However, the opening assisting lock described in Patent Document 1 described above, when the gap between the door and the door frame varies depending on the situation of the site where the door is installed, the pry opening latch does not contact the reaction force member as intended, May not work properly. Therefore, conventionally, in the field, the gap between the door and the door frame is directly measured with a ruler or a gauge, or when the gap cannot be directly measured, the above calculation is performed based on the measured size of the door or door frame. After calculating the clearance, the protruding length from the door of the open latch and the protruding length of the reaction member from the door frame are adjusted. For this reason, there are problems that it takes time to install and adjust the opening assisting lock, and it is difficult to accurately grasp the gap between the door and the door frame due to measurement errors and calculation errors, and it is difficult to increase the mounting accuracy. is there.

  The present invention has been made to solve the above-described problems, and can simplify the mounting and adjustment work regardless of the situation of the site where the door is installed, and can increase the mounting accuracy. An object of the present invention is to provide an opening force assisting lock capable of reliably assisting the opening of the door against the pressure difference generated inside and outside the room.

  In order to achieve the above-described object, the present invention provides a latch member so that the latch member can advance and retract from the door, a strike plate having a latch receiving hole in which the latch member can advance and retract, and the latch member includes An opening force reducing lock that assists the opening of the door from a state of being retracted or inverted from the latch receiving hole, and a notch portion formed on the strike plate and a tip portion project from the strike plate to the door side. The sliding member is slidably provided in the cutout portion and has a contact portion at a position retracted by a predetermined length from the tip portion, and a biasing force that biases the sliding member in a direction protruding to the door side. A member, and a pressing body provided so as to be able to advance and retreat from the door, and abutting on the contact portion and assisting the door in an opening direction when the door is advanced from the door, and the pressing body on the contact portion When contacting, the tip of the sliding member Wherein the contact with the door.

  According to this feature, when the opening of the door is assisted, the tip of the sliding member comes into contact with the door and the sliding member slides in a backward direction against the biasing force of the biasing member. Since the position of contact with the contact portion of the pressing body is always kept constant, the installation and adjustment work can be simplified and the mounting accuracy can be improved regardless of the situation of the site where the door is installed. The pressing body can be brought into contact with the contact portion as intended, and the opening of the door can be reliably assisted against the pressure difference generated inside and outside the room.

  Further, in the opening force reducing lock according to the present invention, a receiving member that supports the sliding member is provided on the back surface side of the strike plate so as to cover the notch, and on the front surface side of the sliding member. An inclined surface may be formed at a position facing the pressing body, and the contact portion may be formed on the inclined surface.

  According to this feature, the mechanism for assisting the door can be simplified and the number of parts can be reduced, so that the manufacturing effort can be reduced and the manufacturing cost can be reduced.

  According to the present invention, it is possible to simplify the mounting and adjustment work regardless of the situation of the site where the door is installed, to improve the mounting accuracy, and to resist the pressure difference generated inside and outside the room. It is possible to obtain various excellent effects such as reliably assisting the opening of the door.

It is a front view which shows the member by the side of the door frame of the opening force reduction lock | rock which concerns on embodiment of this invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a perspective view which shows the sliding member of the member by the side of the door frame of the opening force reduction lock | rock which concerns on embodiment of this invention. It is a sectional side view which shows the member by the side of the door of the opening force reduction lock | rock which concerns on embodiment of this invention. It is a plane sectional view showing the member by the side of the door of the opening force reduction lock concerning an embodiment of the invention.

  Hereinafter, an opening force reducing lock according to an embodiment of the present invention will be described with reference to the drawings.

  The opening force reducing lock according to the embodiment of the present invention includes a door frame side member 2 attached to the vertical frame of the door frame 1 and a door side member 4 attached to the door 3. . In this case, the door 3 is attached to the door frame 1 so as to open to the outdoor side, and a door stop (not shown) is formed in the vertical frame of the door frame 1 on the side opposite to the opening direction of the door 3. A packing (not shown) that seals the gap between the door 3 and the door 3 when the door 3 is closed is attached to this door stop, and when the indoor side becomes negative pressure, the inner portion of the door 3 passes through the packing. Can be pressed against.

  First, the door frame side member 2 will be described in detail with reference to FIGS. Here, FIG. 1 is a front view showing members on the door frame side of the opening force reducing lock according to the embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. FIG. 4 is a perspective view showing a sliding member of a member on the door frame side of the opening force reducing lock according to the embodiment of the present invention.

  The member 2 on the door frame side according to the present embodiment includes a strike plate 5 provided at the top of the vertical frame of the door frame 1, a movable plate 6 provided on the back side of the strike plate 5, and a back side of the movable plate 6. And a trowel 8 provided on the back surface side of the strike plate 5 so as to cover the movable plate 6 and the receiving member 7.

  The strike plate 5 has a vertically long rectangular shape when viewed from the front, the left side portion is folded at a right angle, and the upper and lower end portions 5a and 5b are bent to the back side so as to be inclined. The strike plate 5 is formed with round holes 9 for fixing on the upper and lower sides, and a substantially rectangular latch receiving hole 10 and a notch 11 are formed between the upper and lower round holes 9 in order from the upper side. The notch 11 is formed so as to cut out the edge of the door 3 on the opening direction side (left side in FIG. 1).

  The movable plate 6 has a vertically long rectangular shape when viewed from the front, and the left and right side portions 12 are folded at right angles. The upper and lower ends of the movable plate 6 are formed with tap holes 13 into which female screws are respectively screwed at positions corresponding to the round holes 9 of the strike plate 5. The strike plate 5 and the movable plate 6 are integrated by inserting the screw 14 into the round hole 9 and screwing it into the tap hole 13.

  An upper rectangular hole 15 and a lower rectangular hole 16 are formed between the upper and lower tap holes 13 of the movable plate 6 at positions corresponding to the latch receiving holes 10 and the notch portions 11 of the strike plate 5. In addition, elongated holes 17 that are long in the depth direction (perpendicular to the plane of FIG. 1) are formed in the upper and lower ends of the left and right side portions 12 of the movable plate 6, respectively. It is arranged at a position where it does not interfere.

  The receiving member 7 includes flange portions 18 formed at upper and lower end portions of a strip-shaped plate member, upper and lower side surface portions 19 formed by bending substantially perpendicularly inward from each flange portion 18, and upper and lower side surface portions. 19 is provided with a bottom surface portion 21 so as to be formed between 19 and 19 so as to cover the cutout portion 11 from the back surface side. Each of the upper and lower flanges 18 is provided with a flat cylindrical hooking portion 22 projecting from the center, and the upper and lower hooking portions 22 are fitted into the holes of the movable plate 6 so that the receiving member 7 is It is fixed to the movable plate 6.

  A sliding member 23 is disposed in the notch 11 of the strike plate 5 so as to protrude from the strike plate 5 to the front surface side, and the sliding member 23 moves forward and backward from the door frame 1 (perpendicular to the plane of FIG. 1). ) Is slidably supported along the receiving member 7.

  The sliding member 23 is formed of a block body, and an inclined surface 24 is formed on the surface side so as to face the opening direction side of the door 3 (left side in FIG. 1). Moreover, the front-end | tip part 25 of the sliding member 23 comprises a tapered triangular prism shape, and is formed so that a line contact may be made with a front plate 49 of a lock box 40 which will be described later provided in the mouth of the door 4.

  A concave portion 26 is formed in the inclined surface 24 of the sliding member 23, and the concave portion 26 is located at a position retracted by a predetermined length L (see FIG. 3) from the distal end portion 25 of the inclined surface 24. A contact surface 27 formed so as to be parallel to the contact surface 27, and a bottom surface 28 formed so as to be perpendicular to the contact surface 27 and parallel to the bottom surface portion 21 of the receiving member 7. .

  Between the bottom surface 28 of the recess 26 and the bottom surface 29 of the sliding member 23, a cylindrical guide hole 30 is formed in parallel in the vertical direction. Each guide hole 30 is inserted with a rod-like guide protrusion 31 protruding from the bottom surface portion 21 of the receiving member 7, and the guide hole 30 and the guide protrusion 31 guide the sliding operation of the sliding member 23. Function.

  In addition, a cylindrical spring accommodating portion 32 is formed in parallel with the guide hole 30 in the sliding member 23 in a vertical direction in parallel with the guide hole 30. Each spring accommodating portion 32 accommodates a coil spring 33 erected on the bottom surface portion 21 of the receiving member 7, and this coil spring 33 urges the sliding member 23 in a direction protruding from the strike plate 5. Function as.

  The troyoke 8 is formed in a box shape formed by bending the latch receiving hole 10 of the strike plate 5 and a part of the cutout portion 11 in a concave shape so as to cover the back surface side, and a bowl shape around the box portion 34. And a flange portion 35. Shaft holes (not shown) are respectively formed on the left and right side surfaces of the box portion 34 at opposite positions, and can be moved by caulking the end portions of the shaft portions 36 inserted through the shaft holes and the long holes 17. The plate 6 is fixed to the troyoke 8.

  Next, the door-side member 4 will be described in detail with reference to FIGS. 5 and 6. Here, FIG. 5 is a side sectional view showing the door-side member 4, and FIG. 6 is a plan sectional view showing the door-side member 4.

  The door-side member 4 includes a latch-locked lock box 40, and a lever handle (not shown) is provided as an outer operation member 38 and an inner operation member 39 on the outdoor and indoor surfaces of the door 3, respectively. It has been. Here, the “latch lock” is a lock having a latch member called a latch bolt or a reverse latch, and excludes a lock lock having only a dead bolt. Accordingly, locks having only a latch bolt, a latch bolt or a reversing latch and having a dead bolt (for example, a front door lock) are included in the latch lock here.

  The lock box 40 of the latch lock has a drive cam 41 that rotates by the operating force of the outer operation member 38 or the inner operation member 39, and a rear end of the drive cam 41 that engages with the drive arm 52 of the drive cam 41. The sliding control body 44 slides against the biasing force of the biasing means 43 by the driving force, and the inner end of the sliding control body 44 is connected to the tip of the sliding control body 44 via the connecting means 45. A swing-type pressing body 47 that is pivotally supported via a vertical shaft 46 on the inner wall side of the door of the lock box 40 is incorporated in the center portion corresponding to the corner portion. The part 48 always protrudes from the front plate 49 of the lock box 40 provided at the mouth of the door 3.

  The drive cam 41 includes a cylindrical portion 51 through which the angular shaft 50 connecting the shaft portions of the outer operation member 38 and the inner operation member 39 passes, and a long drive arm 52 extending from the cylindrical portion 51 in a diagonally downward radial direction. The drive arm 52 is provided with a short drive arm 53 extending in a substantially opposite direction.

Further, the latch box 40 of the latch lock is provided with a latch bolt 54 as a latch member so as to be able to advance and retract from the front plate 49. The latch bolt 54 includes an engagement tip 55, a rod-shaped latch rod 56 integrally provided on the rear end surface of the engagement tip 55, and a predetermined length of engagement engaged with the rear end of the latch rod 56. The rear end portion 57 includes a latch spring 59 interposed between the engagement rear end portion 57 and the rear wall 58 of the lock box 40.
Next, the operation of the opening force reducing lock according to the embodiment of the present invention will be described.

  As shown in FIG. 5, in a state where the latch bolt 54 protrudes from the front plate 49 due to the operating force of the outer operating member 38, the outer operating member 39 is pushed down, and the drive cam 41 is rotated in the clockwise direction in FIG. Then, since the short drive arm 53 of the drive cam 41 presses the engaging portion 60 at the rear end portion of the latch bolt 54, the latch bolt 54 moves backward to the rear wall 58 side of the lock box 40.

  Next, when the driving cam 41 is further rotated clockwise by the operating force of the outer operating member 38, the long driving arm 52 of the driving cam 41 contacts the rear end surface of the sliding control body 44, which is well shown in FIG. As shown, the swing-type pressing body 47 is pushed by the distal end portion of the sliding control body 44 at a position where the rear end portion thereof is slightly eccentric to the outside of the center line. As a result, the pressing body 47 rotates horizontally with the upper and lower vertical shafts 46 as fulcrums, and the distal end portion 48 of the pressing body 47 passes through the notch portion 11 and contacts the contact surface 27 of the sliding member 23 on the principle of leverage. Abut.

  Thus, when the front end 48 of the pressing body 47 contacts the contact surface 27 of the sliding member 23, a reaction force is generated, and this reaction force acts in the direction of opening the door 3, A gap is formed between the door frame 1 and the interior and the exterior of the room. As a result, the pressure difference between the inside and outside of the room is eliminated, and the door 3 can be easily opened.

  At this time, the gap between the door 3 and the door frame 1 is not always constant depending on the situation of the site where the door 3 is installed, but the front end portion 49 of the sliding member 23 is the front plate 49 of the lock box 40 of the door 3. , The sliding member 23 is pressed to the back side against the urging force of the coil spring 33, and the position where the tip 48 of the pressing body 47 contacts the contact surface 27 is always kept constant. Therefore, it is necessary to directly measure the gap between the door 3 and the door frame 1 with a ruler or a gauge at the site, or to calculate the gap by calculation based on the measured dust size of the door 3 or the door frame 1. There is no. Therefore, it is possible to simplify the installation and adjustment work of the opening reduction lock and to improve the mounting accuracy regardless of the situation of the site where the door 3 is installed, and to improve the mounting accuracy, and the front end portion 48 of the pressing body 47 abuts. It can be brought into contact with the surface 27 as intended, and the opening of the door can be surely assisted against the pressure difference generated inside and outside the room.

  Further, in the opening force reducing lock having the above-described configuration, even when the door frame 1 is deformed due to the occurrence of an earthquake, the upper and lower end portions 5a and 5b of the strike plate 5 become flat along the flange portion 35 of the troyoke 8. The sliding member 23 and the strike plate 5 can be prevented from interfering with the door 3, so that the door 3 can be opened, and the emergency evacuation can be performed smoothly and reliably. become.

  In the above description of the embodiment, the present invention has been described for the case where the present invention is applied to a so-called earthquake-resistant opening force reducing lock that can open and close the door even when the door frame is deformed due to the occurrence of an earthquake. This is merely an example, and it goes without saying that it can be applied to an opening force reducing lock other than the earthquake-resistant type.

  In the above-described embodiment, the pressing body 47 is configured to contact the contact surface 27 of the recess 26 formed in the inclined surface 24 of the sliding member 23 when assisting the opening movement of the door 3. The present invention is not limited to this case. For example, various modifications such as forming a protrusion or a stepped portion with which the pressing body 47 abuts at a position retracted from the tip 25 of the sliding member 23 by a predetermined length. Is possible.

  Further, in the above-described embodiment, the case where the swing-type pressing body 47 that rotates horizontally around the vertical shaft 46 at the time of contact is used as the pressing body that contacts the contact surface 27. However, this is merely an example. However, as the pressing body, for example, as disclosed in Japanese Patent Application Laid-Open No. 2004-285656 and Japanese Patent Application Laid-Open No. 2005-127044, a slope is formed on the side surface of the tip portion, and it is formed in a substantially wedge shape. Various changes can be made, such as using a known reciprocating-type pressing body that is provided so as to freely advance and retreat from the mouth of the door 3.

DESCRIPTION OF SYMBOLS 1 Door frame 3 Door 5 Strike board 7 Receiving member 10 Latch receiving hole 11 Notch part 23 Sliding member 24 Inclined surface 25 Tip part 27 Contact surface (contact part)
33 Coil spring (biasing member)
47 Pressing body 54 Latch member

Claims (2)

A latch member is provided so as to be able to advance and retract from the door, a strike plate having a latch receiving hole through which the latch member can advance and retract is provided on the door frame, and the latch member is retracted or inverted from the latch receiving hole. An opening force reducing lock that assists in opening the door,
A notch formed in the strike plate;
A sliding member that is slidably provided in the cutout portion so that a tip portion protrudes from the strike plate toward the door, and has a contact portion at a position retracted by a predetermined length from the tip portion;
A biasing member that biases the sliding member in a direction protruding toward the door;
A pressing body provided so as to be able to advance and retreat from the door, and abutting on the abutting portion when advancing from the door and assisting the door in an opening direction;
And an opening force reducing lock, wherein a tip of the sliding member contacts the door when the pressing body contacts the contact portion.   A receiving member for supporting the sliding member is provided on the back surface side of the strike plate so as to cover the notch, and an inclined surface is provided on the surface side of the sliding member at a position facing the pressing body. The opening force reducing lock according to claim 1, wherein the contact portion is formed on the inclined surface.