JP5937051B2 - Locking device - Google Patents

Description

  The present invention relates to a locking device for locking a door to a fixed frame.

  When the handle is rotated on the outside of the door, a locking device that can lock the door to the fixed frame by rotating the stopper on the inner side of the door and engaging the fixed frame is well known. Further, when the handle is rotated, the rod inside the door moves in the vertical and / or horizontal direction of the door and enters the fitting hole formed in the fixed frame so as to be able to be retracted, thereby bringing the door into a locked state. Locking devices that can be used are also well known.

  For example, in the door handle described in Japanese Patent Laid-Open No. 8-170466 (Patent Document 1), a prismatic part is formed at the tip portion of the shaft part extending from the handle to the inside of the door, and a stopper is attached to the prismatic part. Is attached. In addition to being able to engage the fixed frame itself to lock the door, the stopper is attached with a pair of rods that extend in the vertical direction of the door. Accordingly, the doors can be locked by moving these rods up and down.

JP-A-8-170466

  In the locking device of the conventional example, the stopper is fixed to the prismatic portion by a machine screw that is screwed into a screw hole formed in the prismatic portion. In such a locking device, when the door in the locked state is subjected to intense vibration due to an earthquake or the like, or when it is repeatedly tried to forcibly open the door without unlocking operation, a prismatic shape In some cases, a force that deforms the portion and the small screw via a stopper acts on a part of the locking device, or the locking device cannot be unlocked.

  An object of the present invention is to provide a locking device that is improved so as to be able to withstand severe vibration of a door.

  In order to solve the above problems, the present invention is directed to a shaft portion extending from the outer surface side of the door to the inner surface side and capable of repeating the clockwise and counterclockwise rotational movements, and the outer surface side. An operation part capable of rotating the shaft part, a mounting member fixed to the outer surface side for attaching the operation part to the door, and the rotation of the shaft part on the inner surface side It is a locking device having a stopper that rotates in accordance with movement and that allows the door to be locked and unlocked with respect to the fixed frame.

  In this locking device, the present invention is characterized as follows. The shaft portion repeats the rotational movement inside a sleeve-like portion extending from the mounting member toward the inner surface. The attachment member is fixed to the door by clamping the door from the inside and outside in cooperation with a nut screwed to the outer peripheral surface of the sleeve-like portion inside the door. The fastener is fixed to the inner end of the shaft portion extending to the inner surface side of the door, and has a cylindrical portion that covers the outer peripheral surface of the nut, and when the shaft portion is rotated. The cylindrical portion rotates along the outer peripheral surface of the nut.

  In one embodiment of the present invention, the shaft portion includes a columnar portion and a prismatic portion extending in the axial direction from the columnar portion to form the inner end portion, and The metal fitting is non-rotatably fitted to the prismatic part in a square hole formed therein, and the square hole is located at the radial center of the cylindrical part.

  In another embodiment of the present invention, the operation portion is fixed to the shaft portion in a normal state of the locking device and can be attached to and detached from the shaft portion in a normal state of the locking device. Including any of the embodiment handles.

  In the locking device according to the present invention, the shaft portion repeats the rotational movement in the clockwise direction and the counterclockwise direction inside the sleeve-like portion extending inward of the door. The stopper fixed to the tip portion of the shaft portion has a cylindrical portion that covers a nut that is screwed onto the outer peripheral surface of the sleeve-like portion. The door opens and closes by rotating with respect to the fixed frame. When the door is in a locked state when the stopper is engaged with the fixed frame, the vibration is suppressed by the stopper. As its reaction, the fastener may act to bend the prismatic part with which it is fitted. However, in this locking device, when the door vibrates, the inner peripheral surface of the cylindrical portion of the stopper comes into contact with the nut, so that such an action on the prismatic portion can be prevented.

The drawings show specific embodiments of the present invention and include not only the indispensable components of the invention but also forms that can be selectively implemented and preferred embodiments.
The fragmentary perspective view of the locking device in use. The side view of the locking device of FIG. The assembly drawing when the locking device of FIG. 1 is viewed from the inside of the door.

  The details of the locking device according to the present invention will be described with reference to the accompanying drawings as follows.

  FIG. 1 is a partially broken perspective view showing a usage state of a locking device 10 with a handle which is an example of the locking device according to the present invention. The locking device 10 is attached to a door 6 that opens and closes so as to pivot with respect to the fixed frame 5 via a hinge (not shown). However, only a part of the fixed frame 5 and the door 6 is shown in the figure. The locking device 10 includes an operation member 14 having an attachment member 11 fixed to the outer surface side of the door 6 and a handle 13 capable of reciprocating a clockwise and counterclockwise rotational movement with respect to the attachment member 11. And a stopper 15 that reciprocates between a locking position and an unlocking position with respect to the fixed frame 5 by rotating together with the handle 13. The fastener 15 includes a first arm 16 and a pair of second arms 17a and 17b. The first arm 16 is in a locking position behind the edge 5a in the fixed frame 5, and the door 6 is in a locked state. Rod members 18a and 18b are attached to the pair of second arms 17a and 17b, respectively. Each of the rod members 18a and 18b extends in the vertical direction of the door 6, and enters the rod insertion holes 19a and 19b in the fixed frame 5 so as to be able to be retracted. In the illustrated example, when the handle 13 is rotated in the counterclockwise direction indicated by the arrow A, the fastener 15 is also rotated in the counterclockwise direction A, and the engagement of the first arm 16 with the fixed frame 5 is released and the rod members 18a, Each of 18b withdraws from insertion hole 19a, 19b, and locking device 10 and door 6 will be in an unlocking state.

  2 and 3 are a side view of the locking device 10 in FIG. 1 and an assembly view of the locking device 10. However, in FIG. 2, a part of the locking device 10 is shown in a sectional view. In these drawings, the mounting member 11 of the operation portion 14 located on the outer surface side of the door 6 has a sleeve-like portion 20 extending to the inner surface side of the door 6, and the handle 13 is on the inner surface of the door 6 inside the sleeve-like portion 20. It has the axial part 21 extended to the side. On the inner surface side of the door 6, the outer peripheral surface of the sleeve-shaped portion 20 is a male screw 20a. A toothed washer 26 is fitted to the sleeve-like portion 20 and a nut 27 is screwed together, whereby the attachment member 11 is fixed to the door 6. The shaft portion 21 has a columnar portion 21a fitted to the sleeve-like portion 20 so as to be slidable in the circumferential direction, and a prismatic portion 21b (see FIG. 3) extending from the sleeve-like portion 20. A rubber packing 22 is interposed between the mounting member 11 and the door 6, and insertion holes 23 and 24 for the sleeve-like portion 20 are formed in the door 6 and the rubber packing 22. The prismatic portion 21 b located at the tip portion of the shaft portion 21 is fitted in a square hole 36 formed in the fastener 15, and the fastener 15 can be rotated together with the shaft portion 21. A retaining bolt 33 with a spring washer is screwed to the end face 48 of the prismatic portion 21b via a flat washer 34.

  In FIG. 3, the stopper 15 is formed with a first arm 16 extending in the lateral direction perpendicular to the shaft portion 21 and the sleeve-like portion 20 and a pair of second arms 17 a and 17 b extending in the vertical direction. In addition, a cylindrical portion 37 extending toward the door 6 around the square hole 36 is formed. The cylindrical portion 37 is coaxial with the sleeve-like portion 20 and the shaft portion 21, and covers the nut 27 that is screwed into the sleeve-like portion 20, as shown in FIG. The inner diameter of the cylindrical portion 37 is slightly larger than the maximum outer diameter of the nut 27, for example, 0.1 to 0.5 mm larger than the maximum outer diameter, and the handle 13 is rotated counterclockwise A or clockwise. The cylindrical portion 37 rotates in the circumferential direction of the nut 27 when swung. Further, for example, when the intersection of the first arm 16 and the sleeve-like portion 20 slightly changes from the orthogonal state due to vibration of the door 6, that is, when the stopper 15 is slightly inclined with respect to the sleeve-like portion 20, The cylindrical portion 37 connected to one arm 16 is also inclined with respect to the sleeve-shaped portion 20, and the inner peripheral surface of the cylindrical portion 37 abuts on the outer peripheral surface of the nut 27.

  The door 6 that is locked when the stopper 15 is engaged with the fixed frame 5 will vibrate against the fixed frame 5 if it is forced to open without being unlocked or an earthquake occurs. May be repeated. For example, the vibration in the opening direction and the closing direction of the door 6 may be repeated. The movement of the door 6 in the opening direction at that time is stopped by the action of the stopper 15, and the action is the same as the peripheral part of the square hole 36 fitted to the prismatic part 21 b of the shaft part 21. And the cylindrical portion 37 covering the nut 27. That is, the stopper 15 in which the first arm 16 is engaged with the fixed frame 5 has the peripheral portion of the square hole 36 fixed to the prismatic portion 21b via the bolt 33, so that the door 6 moves. Acts to suppress. The stopper 15 is also inclined with respect to the sleeve-like portion 20 when the door 6 is pivoted in the opening direction, and the inner peripheral surface of the cylindrical portion 37 abuts against the nut 27 from the radial direction. It acts to suppress movement in the opening direction. Such an action by the cylindrical part 37 prevents the peripheral part of the square hole 36 from acting so as to bend the prismatic part 21b. Therefore, in the locking device 10, when the cylindrical portion 37 is not present, the movement in the opening direction of the door 6 is stopped only by the interaction between the prismatic portion 21 b and the peripheral portion of the square hole 36. Although a strong force for bending the prism portion 21b may be applied, the presence of the cylindrical portion 37 can prevent such a force from being applied.

  In the locking device 10 in FIG. 2, the mounting member 11 and the handle 13 are integrated in a normal state of use of the locking device 10. However, when the locking device 10 is disassembled, the handle 13 is attached to the mounting member 11. Can be removed. However, in FIG. 2, the detailed structure of the mounting member 11 and the handle 13 is not shown.

  In the locking device 10 of FIG. 1 formed in this way, when the handle 13 is rotated counterclockwise A, the shaft portion 21 rotates counterclockwise A. The stopper 15 fitted to the prismatic portion 21b also rotates counterclockwise A, the first arm 16 is disengaged from the fixed frame 5 and the door 6 is unlocked.

  In order to put the door 6 in the unlocked state into the locked state, the handle 13 may be rotated clockwise after the door 6 is closed. When the handle 13 is rotated clockwise, the stopper 15 can be turned clockwise, and the first arm 16 of the stopper 15 can be engaged with the fixed frame 5 as shown in FIG.

  The locking device 10 can be used in a state where the rod members 18a and 18b are not attached. However, the locking device 10 when the rod members 18a and 18b are attached as shown in FIG. Acts as follows. In FIG. 1, when the handle 13 is operated to rotate the stopper 15 in the counterclockwise direction A, the second arms 17 a and 17 b of the stopper 15 also rotate in the counterclockwise direction A. At that time, the upper rod member 18a in FIG. 1 descends, and the upper end portion thereof retreats from the insertion hole 19a. The lower rod member 18b rises, and the lower end thereof is withdrawn from the insertion hole 19b. Thus, the second arms 17a and 17b are also disengaged from the fixed frame 5, and the door 6 can be opened. The prismatic portion 21b has a generally square end surface 48 (see FIG. 3), and has a screw hole 49 for screwing the bolt 33 into the end surface 48. In the end face 48 of the prismatic part 21b, the length of the diagonal line is the same as or shorter than the diameter of the cylindrical part 21a, and the length of one side in the end face 48 is shorter than the diameter. Therefore, in the shaft part 21, the columnar part 21a can be called a large diameter part, and the prismatic part 21b can also be called a small diameter part in comparison with the columnar part 21a.

  The present invention can also be implemented in a mode in which the normal state of the locking device 10 is different from that of FIG.

DESCRIPTION OF SYMBOLS 5 Fixing frame 6 Door 10 Locking device 11 Mounting member 13 Handle 14 Operation part 15 Fastening bracket 16 Arm (1st arm)
18a rod member 18b rod member 20 sleeve-shaped portion 21 shaft portion 21a columnar portion 21b prismatic portion 27 nut 37 cylindrical portion 43 square hole

Claims (3)

A shaft portion extending from the outer surface side of the door to the inner surface side and capable of repeating a clockwise and counterclockwise rotational movement; and an operating portion on the outer surface side and capable of rotating the shaft portion. An attachment member fixed to the outer surface side for attaching the operation portion to the door, and a state in which the door is locked to the fixed frame by being rotated with the rotational movement of the shaft portion on the inner surface side And a locking device that can be in an unlocked state,
The shaft portion repeats the rotational movement inside a sleeve-like portion extending from the mounting member to the inner surface side,
The mounting member is fixed to the door by clamping the door from the inside and outside direction in cooperation with a nut screwed to the outer peripheral surface of the sleeve-like portion inside the door,
The fastener is fixed to the inner end of the shaft portion extending to the inner surface side of the door, and has a cylindrical portion that covers the outer peripheral surface of the nut, and when the shaft portion is rotated. The locking device is characterized in that the cylindrical portion rotates along the outer peripheral surface of the nut.   The shaft portion includes a columnar portion and a prismatic portion that extends in the axial direction from the columnar portion to form the inner end portion, and the fastener is formed in the square hole formed therein. The locking device according to claim 1, wherein the locking device is non-rotatably fitted to the prismatic part, and the square hole is located at a radial center of the cylindrical part.   The handle according to claim 1, wherein the operation unit includes any one of a handle fixed to the shaft in a normal state of the locking device and a handle removable from the shaft in a normal state of the locking device. 2. The locking device according to 2.

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