JP2018145768A - Door lock and door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which it is easy to cause breakage of an inversion latch mechanism due to repetition of opening and closing a door when an inversion latch that is often used in combination with a push-pull handle is adopted.SOLUTION: A door lock comprises: biasing means that biases a latch bolt in a protrusion direction; a latch hub plate that is axially supported by a pivot perpendicular to front and back surfaces of a door, and that retracts the latch bolt against the biasing means with axial rotation while engaging an engagement part of an arm part protruding from a peripheral edge to the latch bolt; a pressing part whose rotational radius is smaller than that of the engagement part, and that has a surface opposite to the direction of the axial rotation and is formed on the latch hub plate; and a square core reception hole that is formed in the axial center of the latch hub plate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a door lock and a door that can be opened by operating a push-pull handle.

  Conventionally, the push-pull handle can be opened by operating the handle along the opening / closing direction of the opening door, and is generally used. The push-pull handle is operated in the direction in which the handle approaches or separates from the front and back surfaces of the door, so an unlocking mechanism that can be opened with a slight handle operation is required, so a combination with a reverse latch mechanism is often used. It was done. By using the reverse latch mechanism, if the locking piece is fixed to the latch head, the latch head can be swung and the door can be opened. This is because the range may be small.

Reality 3-06773 6-62160

  However, in the case of a door with a conventional push-pull handle that employs a reverse latch mechanism, the push-pull operation of the push-pull handle only releases the restraining state of the locking piece with respect to the latch head during the opening operation, The latch head has a structure in which the door starts to open while protruding from the door front surface of the door, and the door is opened while being sunk into the door lock case with the latch head abutting against the edge of the receiving hole. Even during the closing operation, the latch head is closed by being inserted into the door lock case while being abutted against the outer edge of the door frame formed with a receiving hole in a state of protruding from the door front surface of the door. It becomes a structure to be. Therefore, the latch head provided in the door with the conventional push-pull handle hits the lock case and the through-hole provided to protrude from the door-end surface both when the door is opened and when the door is closed. For this reason, the reversing latch mechanism has a problem that the latch head is quickly worn and easily damaged by repeatedly opening and closing the door. In particular, if a door lock with a push-pull handle equipped with a reversing latch mechanism is used on a gate that does not have a closer attached, the push-pull handle is applied to the gate to promote damage to the latch head due to the strong impact received when the door is closed. It was a difficult factor.

  In addition, in the case of a conventional door with a push-pull handle that employs an inversion latch mechanism, the latch head needs to be inverted, so the length of the part protruding from the door tip surface when closing the door and the length of the rear part from the door tip surface are approximately A rectangular column-shaped piece having a substantially rhombic shape in plan view of the same length was formed. Therefore, when the latch head is reversed by the force received from the door frame when the door is opened and closed, the latch head is pressed by the pressing force generated when the rear end of the latch head and the storage case of the latch head come into contact with each other due to the reversal. There was a problem that the wear was promoted to break.

  In addition, the push-pull handle should have an operating range in which the handle does not collide with the handle mounting surface during the pushing operation, or an operating range in which the handle user does not lose the posture during the pulling operation. There was a restriction that it should be, and it was necessary to narrow the movable range. On the other hand, the knob-type handle with a lever handle and a gripping ball rotates in parallel to the handle mounting surface, so there are less restrictions due to the relationship with the handle mounting surface compared to the push-pull handle, and the movable range Can be increased. Therefore, there is a problem that the push-pull handle cannot be easily applied to the latch bolt protruding and retracting mechanism employed in the lever handle and the knob type handle.

  Therefore, as means for solving the above problems, the door lock according to the present invention is a lock that allows the door to be opened by retracting a latch bolt that can be retracted from the door front surface of the door, and the latch bolt is A latch head portion is provided at the front end portion, a latch shaft portion extending rearward from the latch head portion, and a biasing means for biasing the latch bolt in a protruding direction, and against the front and back surfaces of the door A latch hub plate that is pivotally supported by a vertical pivot and that engages an engaging portion of an arm projecting from a peripheral edge with the latch bolt and retreats the latch bolt against the biasing means by rotating the shaft. A pressing portion formed on the latch hub plate and having a surface having a turning radius smaller than that of the engaging portion and facing the axial rotation direction, and an angle formed at the axial center of the latch hub plate A core receiving hole, The features.

  According to the present invention, when the push-pull handle is attached, the latch bolt can be retracted through the pressing portion, and the lever handle or knob type handle shaft is inserted into the handle shaft hole and attached. In this case, the latch bolt can be moved backward by rotating the latch hub plate through the handle shaft hole.

  In the latch hub plate according to the present invention, the pressing portion may be provided at two locations along the axial rotation direction.

  Furthermore, the door lock provided inside the door, a push-pull handle attached to the front and back surfaces of the door, and protruding from the push-pull handle to the inside of the door, and to the pressing portion A handle lever piece that is in contact with the handle, and the handle lever piece moves forward or backward in conjunction with the operation of the push-pull handle, so that the latch hub plate is pivoted through the pressing portion. It is also preferable to rotate it.

  According to the present invention, it is possible to realize a door lock that allows a latch bolt to appear and retract using a push-pull handle. As a result, when the door is opened, the door can be opened after the latch bolt is immersed, so that a strong impact due to a collision between the latch bolt and the edge of the receiving hole can be avoided. With this effect, the life of the latch mechanism can be extended.

  Further, according to the present invention, the latch shaft portion extending rearward from the latch head has a portion protruding from the door tip surface and the door tip surface, like a latch head employed in a conventional reverse latch mechanism. There is no restriction that the length of the rear portion must be substantially the same length, and the shaft body can be formed as a sufficiently long shaft body with respect to the longitudinal length of the latch head. As a result, the rear portion provided on the rear end portion of the latch shaft portion and the lock case or the like by rotation about the contact portion between the latch head portion and the door tip by the force received by the latch head portion from the door frame when the door is closed. The pressing force in the rotational direction generated between the end holding portion and the holding portion can be made smaller than the pressing force generated between the latch head used in the conventional reverse latch mechanism and the storage case, and the latch shaft portion. It is possible to suppress the occurrence of breakage due to wear. Therefore, it is possible to provide a push-pull handle type door lock that can realize a long life and high reliability even when attached to an opening door such as a gate door to which a closer is not attached.

  ADVANTAGE OF THE INVENTION According to this invention, the door lock provided with the latch bolt raising / lowering mechanism applicable to all of a push pull handle, a lever handle, and a knob type | mold handle is realizable.

It is the figure which attached the push pull handle 9 and looked at the closed door lock 1 from the back surface of the door 2. FIG. It is the figure which looked at the door 2 which provided the door lock 1 and the push pull handle 9 in the inner and outer surface from the door tip side. It is the figure which looked at an example of the internal structure of the push pull handle 9 from upper direction, and is the figure which shows the state which operated the handle | steering-wheel parts 37 and 38, and the outline of the positional relationship with the latch bolt 8. FIG. It is the figure which looked at the door lock 1 which the latch bolt 8 was immersed by the movement of the handle lever piece 36, and was in the open door state from the back surface of the door 2. FIG. It is the figure which looked at the door lock 1 which the latch bolt 8 was immersed by the movement of the handle lever piece 35, and was in the open door state from the back surface of the door 2. FIG. The schematic which shows the mechanism of the restraint state (two-dot chain line) of the latch head 108 of the door lock 100 with a push pull handle which employ | adopted the conventional inversion latch mechanism, and a releasing state is shown. The schematic sectional drawing which shows a mode that the state just before the door lock 100 provided with the conventional inversion latch mechanism was closed from the upper direction was shown. The door lock 1 which concerns on this invention shows the schematic sectional drawing which shows a mode that the mode just before being closed was seen from upper direction. FIG. 3 is a perspective view in which the square core 42 of the lever handle 41 is to be mounted in the square core receiving hole 43 of the door lock 1. It is the figure which looked at the door lock 1 which the latch bolt 8 was immersed by the square core 42 rotated by operation of the lever handle 41, and was in the door open state from the back surface of the door 2. FIG.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  The door lock 1 can be installed on the inner side of the front end of the door 2 along the front surface facing the outside of the space separated by the door 2 and the back surface facing the space. In the following description, the direction perpendicular to the front and back surfaces of the door 2 is defined as the inner and outer directions, and the width direction of the door 2 is defined as the front-rear direction. The door side of the door 2 is the front side.

  The door lock 1 of a present Example is provided with the lock case 3 which can be attached in the door end side edge part of the door 2, as shown in FIG. In the lock case 3, a front back plate 4 that forms a door end side end surface can be attached to the front plate 6 with an attaching screw 5. Inside the lock case 3, there are provided latch bolts 8 that can be projected and retracted from the door end surface of the door 2 through through holes 7 a formed in the front plate 6 and the front back plate 4.

  The door 2 to which the door lock 1 of this embodiment is attached is a hinged door type, for example, an outwardly opening door that opens outward. Specifically, the door 2 is rotatably attached to a rear end portion of a door frame (not shown) via a hinge. Then, by operating a push-pull handle 9 provided on the door 2, the latch bolt 8 can be advanced and retracted to open and close the door 2. As shown in FIGS. 2 and 3, the push-pull handle 9 is provided on both the front surface and the back surface of the door 2. Further, the door lock 1 of the present embodiment is provided with a cylinder device 10 a on the front side of the door 2 and a thumb turn device 10 b on the back side of the door 2, both of which can be interlocked with a dead bolt 11 provided on the lock case 3. It is attached to.

  The dead bolt 11 is provided so as to be able to protrude and retract from the front end face of the door 2 through a through hole 7b provided in the front plate 6 and the front back plate 4 by, for example, a rotation operation of a thumb of the thumb turn device 10b.

  FIG. 1 shows a state in which the door lock 1 in the closed state is viewed from the back surface of the door 2. The closed state of the door lock 1 refers to a state in which the latch bolt 8 protrudes from the lock case 3 and enters the receiving hole 13a of the receiving 12a provided in the door frame, and the open state refers to the state in which the latch bolt 8 is locked. A state of being immersed in the case 3. The latch bolt 8 is attached to a latch head 14, a rod-like latch shaft 15 that is provided horizontally from the rear end of the latch head 14, and a rear end of the latch shaft 15. And a latch guide portion 16. Further, the latch guide portion 16 is formed with a convex portion 17 that protrudes wider inward and outward than the latch shaft portion 15. The protrusion 17 is inserted and held in the elongated rectangular guide hole 3a in the front-rear direction formed on the wall surface constituting the front and back surfaces of the lock case 3, and the back-and-forth movement of the latch shaft portion shakes up and down. It has a function to assist so that there is no.

  A coil spring 19 is provided between the rear end surface of the latch guide portion 16 and the inner surface of the rear plate portion 18 of the lock case 3, and the coil spring 19 biases the latch bolt 8 toward the door end. .

  As shown in FIG. 1, when the door 2 is closed, the latch head 14 protrudes from the door end side end surface of the lock case 3 to be in a closed state, and receives a receiving 12a provided on a door frame (not shown). Abrupt opening of the door 2 is prevented by entering the hole 13a. Further, the tip of the dead bolt 11 can also be inserted into the receiving hole 13b of the receiving 12b provided in the door frame by the operation of the cylinder device 10a or the thumb turn device 10b with the door 2 closed. The closed state can be strongly reinforced.

  Below the latch bolt 8, a pivot shaft 22 is provided inward and outward with respect to the inner plate portion 20 and the outer plate portion 21 constituting the lock case 3, and a latch hub plate 23 is pivotally supported on the pivot shaft 22. Become. A latching pin 24 protrudes inward and outward from the inner plate portion 20 behind the latch hub plate 23, and one end of a winding spring 25 wound around the pivot 22 is locked. The other end of the winding spring 25 is attached to the latch hub plate 23 in a counterclockwise direction by being engaged with an engagement plate piece 26 in which the front edge of the latch hub plate 23 is bent toward the inner plate portion 20. Rush.

  From the front peripheral edge of the latch hub plate 23, an arm portion 27 protruding upward is provided. When the door lock 1 is in the closed state, the engaging portion 28 provided at the distal end portion of the arm portion 27 is It is located slightly in front of the latch guide portion 16.

  In addition, the inner plate portion 20 and the outer plate portion 21 are elongated in the front-rear direction at a position above the pivot shaft 22 and closer to the engaging portion 28 from the axial center of the pivot shaft 22 at a position below the latch bolt 8. An upper lever piece moving hole 29 is provided so as to penetrate inward and outward. Similarly, the inner plate portion 20 and the outer plate portion 21 are moved downward and longitudinally in the lower lever piece at a position below the pivot shaft 22 and at a position approximately the same distance from the pivot shaft 22 as the upper lever piece moving hole 29. A hole 30 is provided so as to penetrate inward and outward.

  Further, an upper pressing portion 31 is projected from the upper peripheral edge of the latch hub plate 23 to a position where it can overlap with the rear half of the upper lever piece moving hole 29 when viewed from the inside and outside directions. The abutting portion 31 is formed with a flat abutting surface 32 on the front side. Further, a lower pressing portion 33 projects from the lower peripheral edge of the latch hub plate 23 to a position where it can overlap with the front half of the lower lever piece moving hole 30 when viewed from the inside and outside. The lower pressing portion 33 is formed with a flat pressing surface 34 on the rear side. The upper pressing portion 31 and the lower pressing portion 33 are formed at positions closer to the engaging portion 28 from the axial center of the pivot 22. Therefore, the turning radius of the pivot 22 of the upper pressing portion 31 and the lower pressing portion 33 is smaller than the turning radius of the engaging portion 28.

  When the latch head 14 protrudes from the through hole 7a and the door lock 1 is in the closed state, the latch bolt 8 is in a position pushed forward by the coil spring 19, and the latch hub plate 23 is as described above. The engaging portion 28 of the arm portion 27 is arranged in front of the latch guide portion 16 with a slight gap by the force of the winding spring 25. Further, the pressing surfaces 32 and 34 are located at intermediate positions of the upper lever piece moving hole 29 and the lower lever piece moving hole 30, respectively.

  Further, as shown in FIG. 2, the push-pull handle 9 can be attached to the handle attachment portions inside and outside the door 2 together with the attachment seat 90. In this embodiment, since the door 2 is an outwardly opening door, the outer push-pull handle 9 is a pull handle 9a, and the inner push-pull handle 9 is a push handle 9b. The pull handle 9a and the push handle 9b are attached to the door 2 via attachment seats 90a and 90b, respectively, and the handle lever piece 35 is inserted from the outer attachment seat 90a toward the inside of the lock case 3, and the inner attachment seat 90b. The handle lever piece 36 is inserted into the lock case 3 at a position below the handle lever piece 35.

  As shown in FIG. 3, the pull handle 9a is provided with a handle portion 37 that is directly gripped by a hand at the tip end of the arm 91a to operate the handle, and the arm 91a is provided in the vertical direction inside the mounting seat 90a. The arm shaft 92a is attached so as to be movable forward and backward. A return spring 93a is wound around the arm shaft 92a, and the handle portion 37 operated to open the door urges the arm 91a so as to automatically return to the original state after the operation. The arm 91a is fixed with a handle lever piece 35 that can swing back and forth in conjunction with the pull handle 9a. On the other hand, as with the pull handle 9a, the push handle 9b is also attached to the arm shaft 92b while an arm 91b that can be moved back and forth is urged by the return spring 93b. Further, a handle lever piece 36 that can swing back and forth in conjunction with the push handle 9b is fixed to the arm 91b.

  As shown in FIG. 1, the handle lever piece 35 inserted into the lock case 3 through the upper lever piece moving hole 29 is arranged at a front position adjacent to the upper pressing portion 31. The handle lever piece 36 inserted into the inside of the lock case 3 through the lower lever piece moving hole 30 is arranged at a rear position adjacent to the lower pressing portion 33.

  The push-pull handle 9 includes handle portions 37 and 38 that are tilted with respect to the surface of the door 2 by pushing or pulling. As shown in FIG. 3, the handle portion 37 of the outer pull handle 9a is By pulling and operating, the handle lever piece 35 can be moved backward. On the other hand, the handle lever piece 36 can be moved forward by pushing and operating the handle portion 38 of the inner push handle 9b. When the hands are released from the handle portions 37, 38, the return springs 93a, 93b automatically return the handle portions 37, 38 to a state parallel to the surface of the door 2.

  When the door 2 is opened from the closed state to the opened state, when the handle portion 38 of the push handle 9b attached to the inside of the door 2 is pressed, the handle lever piece 36 is moved as shown in FIG. It abuts against the pressing surface 34 of the lower pressing portion 33 and is pushed forward. Then, immediately after the latch lever plate 23 starts to rotate clockwise against the winding spring 25 by the operation of the handle lever piece 36, the engaging portion 28 of the arm portion 27 comes into contact with the convex portion 17 of the latch guide portion 16, As the latch bolt 8 moves backward against the coil spring 19, the latch head 14 can be immersed in the lock case 3. The door 2 in which the latch head 14 is immersed is in a state where the door can be opened.

  At this time, since the push handle 9 b is an operation of pushing toward the surface of the door 2, the moving range by the operation is limited to a range in which it does not collide with the surface of the door 2.

  According to the present invention, the lower pressing portion 33 is formed at a position closer to the engaging portion 28 from the axis center of the pivot shaft 22, so that the moving distance of the handle lever piece 36 associated with the operation of the push handle 9 b is increased. Even if it is short, the moving distance of the engaging portion 28 can be increased with respect to the moving distance of the lower pressing portion 33 accompanying the rotation of the latch hub plate 23. Therefore, the latch bolt 8 can be moved backward longer than the moving distance of the handle lever pieces 35 and 36, and the latch head 14 having the front and rear length that is normally used can be sufficiently immersed.

  Similarly, when the handle portion 37 of the pull handle 9a attached to the outside of the door 2 is pulled, as shown in FIG. 5, the handle lever piece 35 pushes the upper pressing portion 31 backward, and the latch hub plate 23 rotates clockwise. Therefore, the latch head 14 can be immersed in the lock case 3 as in the case of the push handle 9b.

  When the door lock 1 is opened by operating the push-pull handle 9, the dead bolt 11 is immersed in the lock case 3 by operating the cylinder device 10a or the thumb turn device 10b in advance.

  In the present embodiment, when the door lock 1 is in the closed state, the arm portion 27 protrudes upward from the front peripheral edge portion of the latch hub plate 23, and the intermediate portion of the arm portion 27 is bent forward. Formed. The lower half 39 of the arm 27 extends obliquely upward and forward from the latch hub plate 23 and continues to the upper half 40, and the upper half 40 of the arm 27 is connected to the upper lever piece moving hole 29. It extends diagonally up and backward from the front lower position, passes slightly above the front end of the upper lever piece moving hole 29 and reaches the front surface of the convex portion 17.

  By forming the arm portion 27 in such a shape, the arm portion 27 rotates with the latch hub plate 23 when the door lock 1 is changed from the closed state to the open state by the operation of the push-pull handle 9. Also, it does not overlap the upper lever piece moving hole 29. As a result, even when the latch hub plate 23 is pivoted by the handle lever piece 36 inserted into the lower lever piece moving hole 30, the arm portion 27 is attached to the handle lever piece 35 inserted into the upper lever piece moving hole 29. Do not collide with each other, and the handle lever piece 35 does not obstruct the shaft rotation of the latch hub plate 23.

  According to the door lock 1 having the push-pull handle 9, when the door is opened, the door 2 can be opened after the latch bolt 8 is immersed, so the latch bolt 8 and the receiving hole before the door are opened. The impact with the edge of 13a can be avoided. Due to such an effect, the life of the latch mechanism can be extended. In particular, by making the return springs 93a and 93b slightly weaker than the force required to start the door opening operation, the latch bolt 8 can be immersed before the door opening operation. 8 is preferable because it can effectively avoid the impact with the receptacle 12a.

  Here, for comparison, FIG. 6 shows a schematic diagram showing a mechanism of a door lock 100 with a push-pull handle employing a conventional reverse latch mechanism, and the door opening operation will be described. By a push-pull operation of a push-pull handle (not shown), a pair of upper and lower locking pieces 123 are attached to the lock case 103 so as to be opened and closed up and down about the shaft 122 as an axis. The locking piece 123 is changed from a constrained state indicated by a two-dot chain line in FIG. 6 to a released state indicated by a solid line by acting so that the upper and lower operating pieces 132 are narrowed by an operation of a push-pull handle (not shown). Can do. For the detailed operation mechanism of the locking piece 123, reference can be made to, for example, the prior art document 1. A guide case 150 is installed between the upper and lower arms 127 of the locking piece 123, and the latch head 108 is accommodated inside the guide case 150 so as to be able to protrude and retract from the front end surface of the door. A forward biasing means 119 is attached to the latch head 108. Through holes 116 are formed in the upper and lower end surfaces of the guide case 150, and a fixed end portion 128 that protrudes downward from the tip of the arm 127 can enter the opening case 150 from the through hole 116. It has become.

  In the restrained state of the conventional mechanism, the locking piece 123 is in the position of the two-dot chain line in FIG. 6, and the fixed end portion 128 enters the through hole 116 to form the fixing groove 117 formed on the upper and lower surfaces of the latch head 108. The latch head 108 is fixed by pressing from above and below. The latch head 108 in a restrained state is in a state in which the door cannot be reversed inward and outward by the locking piece 123, and by forming a parallel surface on the inner surface of the receiving hole and the surface on the side to be opened, Even if the door is rotated in the opening direction, the door is not immersed, so that the door can be kept closed.

  Next, in the released state of the conventional mechanism, the locking piece is in the position of the solid line in FIG. 6, and the latch head 108 remains protruding from the door end surface only by releasing the restrained state with respect to the latch head 108. The latch head 108 in the released state can be reversed inward and outward of the door. When the door is opened, the latch head 108 is turned against the edge of the receiving hole by turning the door from the released state in the opening direction. Since the inverted latch head 108 forms an inclined surface inward and outward with respect to the receiving hole, when the door opening operation is further continued, the latch head 108 is opened while entering the door lock case 103. Further, even during the closing operation, the latch head 108 is reversed from the door frame case 103 while being abutted against the outer surface end 112c of the door frame while protruding from the door front surface of the door by the urging means 119. It is closed by being made to do.

  Therefore, the latch head 108 provided in the conventional reverse latch mechanism is immersed in the lock case 103 by the impact force when it hits the door frame both when the door is opened and when the door is closed, thereby completing the opening / closing operation. Become. For this reason, the reversing latch mechanism has a problem that the latch head is quickly worn and easily damaged by repeatedly opening and closing the door. In particular, if a door lock with a push-pull handle equipped with a reversing latch mechanism is used on a gate that does not have a closer attached, the push-pull handle is applied to the gate to promote damage to the latch head due to the strong impact received when the door is closed. It was a difficult factor.

  Furthermore, the effect which reduces the force which the door lock 1 receives from a door frame at the time of closing compared with the conventional door lock 100 is demonstrated.

  FIG. 7 is a schematic cross-sectional view showing a state in which the door lock 100 provided with the conventional reverse latch mechanism is viewed from above just before the door is closed. In FIG. 7, a part of the locking piece 123 is omitted. When the latch bolt 108 abuts against the abutment plate 112c projecting outward from the receptacle 112a at the time of A1 when the door is closed, the latch bolt 108 attempts to rotate about the axis B1, thereby causing the rear end of the latch head 108 to move. And the guide case 150 of the latch head 108 come into strong contact at C1. Further, wear of the latch head 108 was promoted by the pressing force generated when contacting by the shaft rotation, and the breakage occurred. In particular, since the latch head 108 needs to perform a reversing operation in the guide case 150, when the door is closed, the portion protruding from the door tip surface and the rear portion of the door tip surface have substantially the same rhombus in plan view. It is composed of a prismatic piece. According to such a configuration, the length β1 in the front-rear axis direction from B1 to C1 cannot be sufficiently increased with respect to the length α1 in the front-rear axis direction from B1 to A1, so that the latch head 108 is A1. Thus, the force received from the abutting plate 112c is directly transmitted to C1, and the force received at C1 cannot be reduced.

  FIG. 8 is a schematic cross-sectional view showing a state in which the door lock 1 according to the present invention is viewed from above just before the door is closed. The latch head 14 and the latch shaft 15 are firmly fixed by a fixing pin 14a. When the latch head 14 abuts against the abutment plate 12c projecting outward from the receptacle 12a when the door is closed at A2, the latch bolt 8 attempts to rotate about the axis B2 so that the latch shaft portion 15 The rear end portion 16 provided at the rear end portion and the lock case 3 come into contact with each other at C2. However, like the latch head 108 employed in the conventional reversing latch mechanism, the latch shaft portion 15 has a portion protruding from the door-end surface and a length behind the door-end surface that is substantially the same length. There are no restrictions on what to do. Accordingly, the length β2 in the front-rear axial direction from B2 to C2 can be formed as a sufficiently long shaft body with respect to the length α2 in the front-rear axial direction from B2 to A2. Accordingly, if α1 in FIG. 7 and α2 in FIG. 8 have the same length, the rear end of the latch shaft portion 15 is caused by the shaft rotation about B2 by the force received by the latch head 14 from the abutting plate 12c when the door is closed. The force with which the portion 16 presses the lock case 3 in the rotation direction can be reduced as compared with the latch head used in the conventional reverse latch mechanism, and the occurrence of damage due to wear of the latch shaft portion 15 can be suppressed. it can. Therefore, according to the door lock 1, it is possible to provide a push-pull handle type door lock that can realize a long life and high reliability even when attached to an opening door such as a gate door to which a closer is not attached.

  Furthermore, as another embodiment, a square core receiving hole 43 into which a square core 42 provided at the center of the lever handle 41 can be inserted is provided at the center of the latch hub plate 23. As shown in FIG. 9, if the square core 42 is inserted into the square core receiving hole 43 and the lever handle 41 is attached to the door lock 1, the door lock 1 is not changed from the door 2 in place of the push-pull handle 9. The door 2 can be opened using the same locking / unlocking mechanism. The lever handle 41 may be a knob type handle provided with a grip ball.

  As shown in FIG. 10, the door lock 1 to which the lever handle 41 is attached turns the latch hub plate 23 against the winding spring 25 by rotating the square core 42 by rotating the lever handle 41 clockwise. Rotate around. Immediately after the latch hub plate 23 starts rotating, the engaging portion 28 of the arm portion 27 comes into contact with the convex portion 17 of the latch guide portion 16, and the latch bolt 8 moves backward against the coil spring 19. 14 can be immersed in the lock case 3. The door 2 in which the latch head 14 is immersed is in a state where the door can be opened.

  A dead bolt 11 provided at an upper portion of the latch bolt 8 is provided with a dead head 44 protruding from the front end surface of the door 2 along the guide case 50 through the through hole 7b at the front end, and extending backward from the dead head 44. And a deadbolt shaft 45 that is present. A locking recess 46 is formed at the rear upper end of the dead bolt shaft portion 45, and an operating arm 48 extending downward from the periphery of the cam 47 pivotally supported above the dead bolt shaft portion 45 is provided. Become. An engaging protrusion 48 a that can engage with the locking recess 46 is provided at the distal end of the operating arm 48 so as to protrude toward the center of the width of the lock case 3.

  A cam hole 49 that can be joined to the operating shafts of the cylinder device 10a and the thumb turn device 10b is formed in the shaft central portion of the cam 47. For example, the cam hole 49 is actuated by rotating the knob of the thumb turn device 10b joined to the cam 47. While the engaging projection 48a of the arm 48 is in contact with the locking recess 46, the dead bolt shaft 45 is pushed forward, and when the operating arm 48 rotates a predetermined angle, the dead head 44 passes through the through hole 7b and the front end of the door 2 Project from the surface. Further, by rotating the key in the reverse direction, the operating arm 48 pulls the dead bolt shaft portion 45 backward, and the dead head portion 44 can be immersed in the lock case 3.

1 Door lock 2 Door
3 Lock Case 7a, 7b Through-hole 8 Latch Bolt 9a, 9b Push Pull Handle 12a, 12b Receiving 14 Latch Head 15 Latch Shaft 16 Latch Guide Port 22 Pivot 23 Latch Hub Plate 27 Arm 28 Engaging Portion 31 Upper Pushing Portion 33 Lower pressing part 43 Square core receiving hole

Claims (3)

A lock that allows the door to be opened by retracting a latch bolt that can be retracted from the door end surface of the door,
The latch bolt includes a latch head at a front end and a latch shaft extending rearward from the latch head.
Biasing means for biasing the latch bolt in the protruding direction;
The latch bolt is opposed to the urging means by rotating the shaft while engaging the engaging portion of the arm portion that is pivotally supported perpendicular to the front and back surfaces of the door and projects from the periphery. A latch hub plate to be retracted;
A pressing portion formed on the latch hub plate, having a turning radius smaller than that of the engaging portion and having a surface facing the direction of the shaft rotation;
A door lock comprising: a square core receiving hole formed at the axial center of the latch hub plate. 2. The door lock according to claim 1, wherein in the latch hub plate, the pressing portion is provided at two locations along a direction of the shaft rotation. The door lock provided inside the door;
A push-pull handle attached to the front and back of the door;
A handle lever piece that protrudes from the push-pull handle into the door and abuts against the pressing portion,
2. The latch hub plate according to claim 1, wherein the handle lever piece moves forward or backward in conjunction with an operation of the push-pull handle, thereby rotating the latch hub plate through the pressing portion. 2. The door described in 2.

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