JP2008127916A - Lock apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock apparatus having a simple construction and permitting to optionally preset a force required for forcibly unlocking a door. <P>SOLUTION: This lock apparatus has a latch portion 1 installed to a door jamb B and a catch portion 2 installed to a door A. The latch portion 1 comprises a latch bolt 10 freely movable in a direction perpendicular to an opening and closing direction of the door A and being exerted in a direction toward the catch portion 2; and a stopper 12 controlling the movement of a latch bolt 10 by means of turning on or off an electric current to a solenoid 11. The catch portion 2 has a catch 20 linking to the latch bolt 10 and a displacement member exerting the catch 20 in a direction toward the latch bolt 10. The displacement member can be composed with a first displacement member 21 and a second displacement member 22 respectively made by placing elastic plate-shaped members one upon another with a certain interval held between them. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a locking device that electrically and mechanically locks and unlocks a door.

Conventionally, as a locking device that electrically locks / unlocks a door, the door can be forcibly unlocked by applying a predetermined load or more in an emergency even when the door is locked. For example, there is one disclosed in Patent Document 1. This conventional example is an automatic closing device for a fire door in which a main body housing is mounted and fixed at an appropriate position of a recess formed on a wall surface to store the fire door, and is normally exposed from a notch opening of the main body housing. Pushing the engagement fitting provided on the fire door side into the hook plate that was made to actuate the latch mechanism built in the main body housing, and the hook plate restrains the engagement fitting and holds the fire door in the recess. In the event of an emergency such as when a fire breaks out, the solenoid built in the main housing is driven to release the latch mechanism and the hook plate releases the engagement fittings, so that the fire door is opened by the door closer etc. Close. Further, when the solenoid is not driven for some reason, the passage can be forcibly closed by pulling the engagement fitting from the hook plate by pulling the engagement fitting with a predetermined force or more.
JP 2005-320824 A

  However, in the above conventional example, the latch mechanism is operated by sequentially interlocking a plurality of parts by driving the solenoid, and the hook plate and the engagement fitting are unlocked and unlocked. There was a problem that the structure became complicated.

  The present invention has been made in view of the above points, and an object thereof is to provide a locking device having a simple structure and capable of arbitrarily setting a force required to forcibly unlock a door. To do.

  In order to achieve the above object, the invention of claim 1 includes a latch portion disposed on either the door or the door frame and a catch portion disposed on either the door or the door frame. The latch portion has a latch bolt that is movable in a direction perpendicular to the door opening / closing direction and is biased toward the catch portion, and a control means for controlling the movement of the latch bolt by energization / non-energization. The catch portion has a catch that engages with the latch bolt, and a displacement member that biases the catch in a direction toward the latch bolt, and the control means moves the latch bolt when the latch bolt is engaged with the catch. This is a locking device that locks the door by blocking the door and unlocks the door by applying a load greater than the urging force of the displacement member to disengage the latch bolt and catch. And Position member is characterized in that the plate-like member having at least two or more elastic consisting disposed at predetermined intervals.

  According to a second aspect of the present invention, in the first aspect of the invention, the catch portion is displaced when the plate-like member that is first pushed by the catch is not displaced, and the plate-like member is pushed by the catch. An adjusting means for adjusting the amount of displacement until a force is applied to the plate-like member is provided.

  According to a third aspect of the present invention, in the second aspect of the present invention, the catch portion includes a housing that houses the catch and the displacement member, and includes an operation unit that adjusts the displacement amount by the adjustment unit from the outside of the housing. It is characterized by that.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the adjusting means adjusts the amount of displacement by an adjusting member provided between the plate-like members.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the displacement member includes two plate-like members arranged at a predetermined interval, and the adjustment member is a first plate on the side away from the catch. It has a male screw part screwed into a female screw part penetrating in the thickness direction of the member, and comprises a connecting screw provided penetrating in the thickness direction of the first plate member.

  According to a sixth aspect of the present invention, in the fourth aspect of the present invention, the displacement member includes two plate-like members arranged at a predetermined interval, and the adjustment member is a first plate on the side away from the catch. A fixing portion having a female screw portion provided in the plate-like member and penetrating in the thickness direction of the first plate-like member, and a male screw portion screwed into the female screw portion, and the thickness direction of the first plate-like member A through-hole having a larger diameter than the female screw portion that is provided through the inner screw portion, and a connecting screw that projects through the female screw portion of the fixing portion so as to face the second plate-like member on the side close to the catch. It is characterized by.

  A seventh aspect of the invention is characterized in that, in the sixth aspect of the invention, the first plate-like member is formed such that a portion in the vicinity of the through hole is formed wider than the other portions.

  The invention of claim 8 is characterized in that, in the invention of claim 1, the catch part has a support part for supporting the plate-like member, and is provided with a support position changing means for changing the arrangement position of the support part. .

  The invention according to claim 9 is the invention according to any one of claims 1 to 8, wherein the displacement member is formed by superposing a plurality of elastic plate-like members.

  According to the first aspect of the present invention, the displacement member formed by disposing at least two or more elastic plate-like members at a predetermined interval is disposed so as to face the catch. A lock that can deflect the displacement member by applying a load greater than the urging force of the displacement member and disengage the latch bolt and the catch by displacing the catch, thus forcibly unlocking the door with a simple structure A device can be configured. In addition, the door can be changed by changing the amount of bending of each plate-like member and the distance from the first plate-like member pushed by the catch until the first plate-like member is pushed by the catch to apply force to the next plate-like member. The force required to forcibly unlock can be set arbitrarily.

  According to the invention of claim 2, from the state where the plate-like member pushed first by the catch is not displaced, the plate-like member is displaced by being pushed by the catch until it exerts a force on the next plate-like member. By adjusting the amount of displacement, the force required to forcibly unlock the door can be arbitrarily set.

  According to the invention of claim 3, since the displacement amount can be adjusted from the outside of the housing by the operating means, the force required for forcibly unlocking the door can be easily set.

  According to the invention of claim 4, the force required to forcibly unlock the door can be arbitrarily set by adjusting the amount of displacement by the adjusting member provided between the plate-like members.

  According to the invention of claim 5, the distance between the connection screw and the second plate member can be changed by rotating the connection screw from the outside, and therefore the door is forcibly unlocked. Can be arbitrarily set.

  According to the invention of claim 6, the distance between the connection screw and the second plate member can be changed by rotating the connection screw from the outside, so that the door is forcibly unlocked. Can be arbitrarily set. Furthermore, since the stress due to the load on the connecting screw can be reduced at the fixed portion, the reliability of the connecting screw can be improved.

  According to the seventh aspect of the present invention, the concentration of stress due to the load on the first plate-like member can be alleviated by forming the portion in the vicinity of the through hole to be wider than the other portions. . In addition, since only a part of the first plate-like member has a wider shape than other parts, the size of the first plate-like member can be reduced.

  According to the eighth aspect of the present invention, the amount of flexure of the plate-like member can be changed by changing the arrangement position of the support portion, so that the door is forcibly unlocked without changing the previous displacement amount. Can be arbitrarily set.

  According to invention of Claim 9, it can relieve | moderate the stress by the load to a displacement member by setting it as the multilayered structure which piled up the plate-shaped member. Moreover, the force required for forcibly unlocking the door can be arbitrarily set by changing the number of the plate-like members to be overlapped.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, in the following description, the top, bottom, left, and right in FIG. As shown in FIG. 1A, the present embodiment includes a latch portion 1 disposed on the door frame B and a catch portion 2 disposed on the door A so as to face the latch portion 1.

  As shown in FIG. 1A, the latch unit 1 includes a latch bolt 10 that is movable in a direction (left-right direction) perpendicular to the opening / closing direction of the door A (direction perpendicular to the paper surface in FIG. 1), and a vertical direction. It has a stopper 12 that prevents the latch bolt 10 from moving by moving, and a solenoid 11 that moves the stopper 12 up and down by energization / non-energization. These stopper 12 and solenoid 11 constitute a control means.

  The latch bolt 10 has a guide hole 10a penetrating from the left end surface to the right side thereof, and is erected from the lower side of the left end edge of the long mounting plate 3 formed in a substantially flat plate shape to the front side of the drawing. A shaft 13 protruding from one mounting piece 17 is inserted into the guide hole 10a so as to be movable in the left-right direction. A pair of coil springs 14 is interposed between the left end surface of the latch bolt 10 and the first mounting piece 17, and one end of each coil spring 14 is connected to the first mounting piece 17 and the other end. Since the portion is attached to the left end surface of the latch bolt 10, the latch bolt 10 is biased in the right direction, that is, in the direction toward the catch portion 2. A frame 15 having an opening (not shown) penetrating in the left-right direction is attached and fixed to the right end edge of the mounting plate 3. The opening of the frame 15 is formed to have a size that allows the latch bolt 10 to pass therethrough, and the latch bolt 10 is inserted through the opening, thereby restricting the movement of the latch bolt 10 in a direction other than the left-right direction.

  The stopper 12 is formed in a substantially flat plate shape, and is provided with an opening 12a large enough to allow the latch bolt 10 to pass therethrough. The longitudinal direction of the stopper 12 coincides with the vertical direction, and the opening 12a is the latch bolt 10. Are supported by the frame 15 so as to be movable. The solenoid 11 is fixedly mounted on a second mounting piece 18 that is erected from the upper side of the left end edge of the mounting plate 3 toward the front side of the drawing, and the upper end of the stopper 12 is attached to a drive shaft (not shown) built in the solenoid 11. By connecting the parts, the stopper 12 moves to two places in the vertical direction according to energization / non-energization of the solenoid 11. Thus, when the stopper 12 is in the lower position, the latch bolt 10 can pass through the opening 12a. When the stopper 12 is in the upper position, the opening 12a is more than the latch bolt 10. Since the left end surface of the latch bolt 10 abuts against the stopper 12 to move upward, the latch bolt 10 is prevented from moving in the left-right direction.

  As shown in FIG. 1A, the catch portion 2 includes a catch 20 that engages with the latch bolt 10, a first displacement member 21 that biases the catch 20 in a direction toward the latch bolt 10, and a second displacement. Member 22. The catch 20 is supported by a frame 28 that is fixedly mounted at substantially the center of the left end edge of the mounting plate 4 formed in a substantially flat plate shape. The frame 28 has an opening (not shown) that is formed in a size that allows the catch 20 to pass therethrough in the left-right direction, and allows the catch 20 to be inserted through the opening so that the catch 20 has a direction other than the left-right direction. The movement to is regulated. In addition, a protrusion 20 a having a substantially triangular shape in plan view is provided at the right end of the catch 20.

  As shown in FIG. 1B, the latch bolt 10 and the catch 20 include a mountain-shaped right end portion of the latch bolt 10 and a valley-shaped left end portion corresponding to the shape of the right end portion of the latch bolt 10 of the catch 20 Are engaged with each other, the door A can be opened in either the pushing direction (the direction from the front of the paper to the back of the paper) or the pulling direction (the direction from the back of the paper to the front of the paper). Further, the angle of the peak of the peak shape at the right end of the latch bolt 10 is larger than the angle of the peak of the valley shape at the left end of the catch 20, so that the peak slope and the valley slope contact each other over the entire surface. Therefore, the frictional force can be suppressed and the door A can be easily opened.

  Each of the first displacement member 21 and the second displacement member 22 is formed by superposing a plurality of elastic plate-like members, and a third attachment that is erected from the right edge of the attachment plate 4 toward the front side of the drawing. It is held by a pair of holding portions 26 provided on the piece 29. As shown in FIG. 3B, the plate-like member constituting the first displacement member 21 on the side away from the catch 20 is formed in a substantially flat plate shape, and holding portions to be described later are provided at both ends in the longitudinal direction. A substantially circular screw hole 21c through which the adjustment screw 26a of 26 is inserted is penetrated, and a substantially circular shape having a diameter larger than the diameter of a connecting screw 24 to be described later is provided at the approximate center in the longitudinal direction. The through-hole 21a is penetrated. Further, between the screw hole 21c and the through hole 21a, a substantially circular pin hole 21b through which a pin 25 described later is inserted is provided. In addition, the plate-like member constituting the first displacement member 21 has a portion in the vicinity of the penetrating hole 21a and the pin hole 21b that is formed wider than both ends in the longitudinal direction. As a result, the concentration of stress due to the load on the first plate member 21 is reduced.

  The holding portion 26 includes a cylindrical portion 26b formed in a substantially cylindrical shape, and an adjustment screw 26a having a male screw portion (not shown) that is screwed into a female screw portion (not shown) provided in the cylindrical portion 26b. The cylindrical portions 26b are fixedly attached to the third mounting pieces 29 so as to be inserted through insertion holes (not shown) penetrating the upper and lower end portions of the third mounting piece 29. The first displacement member 21 is disposed so as to come into contact with the left end surface of the cylindrical portion 26b, and an adjustment screw 26a projects leftward from the left end portion of the cylindrical portion 26b through the screw hole 21c. Then, the second displacement member 22 is attached to the left end portion of the adjustment screw 26a, so that the first displacement member 21 and the second displacement member 22 are held at a predetermined interval. The adjustment screw 26a is movable in the left-right direction by inserting a tool or the like from the right end portion of the cylindrical portion 26b and rotating the head (not shown). The distance from the displacement member 22 can be arbitrarily changed (see FIGS. 4B and 4C).

  As shown in FIG. 3A, a plate-like fixing portion 23 is provided on the surface of the first displacement member 21 that faces the second displacement member 22, and a female screw portion ( (Not shown) is provided in the thickness direction. A pair of pins 25 project rightward from both upper and lower ends of the fixing portion 23, and the fixing portion 23 rotates by inserting these pins 25 into the pin holes of the first displacement member 21. Is prevented. A connection screw 24, which is an adjustment member having a male screw portion (not shown), is inserted into the female screw portion of the fixing portion 23 and the through hole 21 a of the first displacement member 21, and the left end portion thereof is the fixing portion 23. The head 24a at the right end is exposed to the outside through an insertion hole (not shown) penetrating through the third attachment piece 29. Further, the male screw portion of the connecting screw 24 is screwed into the female screw portion of the fixing portion 23, and the connecting screw 24 is movable in the left-right direction by rotating the head 24a of the connecting screw 24.

  As shown in FIG. 2, the latch portion 1 and the catch portion 2 contact the mounting plates 3 and 4 with the door frames B and A so that the longitudinal direction thereof coincides with the vertical direction. The mounting screws 5 are screwed through the mounting holes 3a and 4a respectively penetrating the upper and lower ends, so that they are mounted on the door frame B and the door A, respectively. Further, protective covers 30 and 40 for protecting the components constituting each part are attached so as to cover the mounting plates 3 and 4 with the latch bolt 10 and the catch 20 exposed, and these protective covers 30 and 40 and A housing is constituted by the mounting plates 3 and 4. The latch unit 1 is connected to a controller (not shown) that transmits a locking / unlocking drive signal by a signal line 16.

  Next, the operation of the locking device of this embodiment will be described. First, at the time of unlocking, the solenoid 11 is not energized, and the stopper 12 is urged downward by a spring (not shown) provided on the solenoid 11, so that the latch bolt 10 opens the opening 12 a of the stopper 12. Since it can pass, the door A can be freely opened and closed. When the door A is closed, the catch 20 is brought into contact with the latch bolt 10 by pushing or pulling the door A, and further, the catch 20 pushes the latch bolt 10 and moves it to the left by further weighting. 10 is guided and engaged with the valley-shaped portion of the catch 20 by the biasing force of the coil spring 14 provided on the door 10, and the door A is closed. When opening the door A, the door A is pushed or pulled, so that the slope of the valley-shaped portion of the catch 20 pushes the slope of the mountain-shaped portion of the latch bolt 10 and moves the latch bolt 10 to the left. The door A opens by releasing the engagement between the bolt 10 and the catch 20.

  At the time of locking, the stopper 12 is moved upward by energizing the solenoid 11. Therefore, when trying to open the door A, the slope of the valley-shaped portion of the catch 20 pushes the slope of the mountain-shaped portion of the latch bolt 10 to move the latch bolt 10 to the left. Abuts against the stopper 12 to prevent movement. At this time, the catch 20 also receives a load from the latch bolt 10 and moves to the right and the protrusion 20a comes into contact with the second displacement member 22, but is strongly biased to the left by the second displacement member 22. Is prevented from moving to the right. Thus, since the latch bolt 10 and the catch 20 are not disengaged, the door A cannot be opened.

  Here, when a force equal to or greater than the urging force of the second displacement member 22 is applied, the second displacement member 22 is pushed by the protrusion 20 a and bent to the right, and the second displacement member 22 is moved to the left end of the connection screw 24. Abuts against the part. When further weighted, the protrusion 20a pushes the first displacement member 21 through the second displacement member 22 and the left end portion of the connecting screw 24, and the urging force of the second displacement member 22 and the first displacement member 21 By applying a force greater than the urging force, the first displacement member 21 also bends to the right, and when the catch 20 moves to the right, the engagement with the latch bolt 10 is released and the door A is forcibly unlocked. can do.

  Next, a method for adjusting the locking force F of the locking device of the present embodiment, that is, the force required to forcibly unlock the door A during locking will be described. Since the locking force F of this embodiment is determined by the urging force of the second displacement member 22 and the urging force of the first displacement member 21, the second displacement member 22 is shown in FIG. And the locking force F can be adjusted by changing the distance X between the connecting screw 24 and the left end of the connecting screw 24.

  For example, if the amount of displacement of the catch 20 required to disengage the latch bolt 10 and the catch 20 is d, the second displacement member 22 is moved to the left end of the connecting screw 24 if the distance X is greater than the amount of displacement d. Since the latch bolt 10 and the catch 20 are disengaged before coming into contact with the portion, the locking force F is determined only by the urging force of the second displacement member 22. If the distance X is smaller than the displacement amount d, the second displacement member 22 pushes the first displacement member 21 through the left end portion of the connecting screw 24 so that the latch bolt 10 and the catch 20 are disengaged. The locking force F is determined by the urging force of the first displacement member 21 and the urging force of the second displacement member 22, and its value changes according to the distance X (see FIG. 3B). Therefore, the locking force F can be easily changed by moving the connecting screw 24 in the left-right direction and changing the distance X.

  As described above, a simple structure in which the first displacement member 21 and the second displacement member 22 formed by stacking elastic plate-like members are disposed so as to face the catch 20 with a predetermined interval therebetween. Thus, a locking device that can forcibly unlock the door at the time of locking can be configured, and the connecting screw 24 is moved in the left-right direction so that the second displacement member 22 and the left end of the connecting screw 24 The locking force F can be easily changed simply by changing the distance X.

  In this embodiment, the connecting screw 24 is inserted through the fixing portion 23. However, the fixing portion 23 is omitted, and a male screw portion of the connecting screw 24 is provided by providing a female screw portion in the through hole 21a of the first displacement member 21. The connecting screw 24 may be configured to be adjustable in the left-right direction by being screwed to the portion.

  Further, as shown in FIG. 4A, the fixing portion 23 and the connecting screw 24 are omitted, and the interval between the first displacement member 21 and the second displacement member 22 is changed by the adjustment screw 26 a of the holding portion 26. Therefore, the locking force F may be adjusted. In this case, when a force equal to or greater than the urging force of the second displacement member 22 is applied to the catch 20 during locking, the second displacement member 22 is pushed by the protrusion 20a and bent to the right, and the second displacement member 22 is bent. However, the first displacement member 21 is bent by directly pushing the first displacement member 21.

  Further, as shown in FIG. 5, the fixing portion 23 and the connecting screw 24 may be omitted, and the locking force F may be adjusted by the support portion 27. The support portion 27 is a pair of screws that are inserted into a pair of insertion holes (not shown) having a female screw portion (not shown) provided in the third attachment piece 29, and is provided in each screw. A male screw portion (not shown) is screwed into the female screw portion of the insertion hole, and the right end head portion 27a is rotated to be movable in the left-right direction. Thus, when the left end portion of the support portion 27 is adjusted so as to contact the first displacement member 21, the first displacement member 21 is supported at the distance L1 between the pair of support portions 27. Compared to the case where the displacement member 21 is supported at the distance L2 between the pair of holding portions 26, the amount of bending can be reduced, and thus the locking force F can be increased.

It is a figure which shows embodiment of the locking device of this invention, (a) is schematic, (b) is a top view which shows engagement of a latch bolt and a catch. It is a whole perspective view which shows the state which attached the locking device same as the above to the door and the door frame. It is a figure which shows the adjustment method of the locking force using a fixing | fixed part and a connection screw same as the above, (a) is a partial abbreviation figure of a catch part, (b) is a top view of a 1st displacement member, (c) These are graphs showing the correlation between the distance between the second displacement member and the end of the connecting screw and the locking force. It is a figure which shows the adjustment method of locking force with an adjustment screw same as the above, (a) is a schematic diagram of a catch part, (b) is a figure which shows the case where the space | interval of a displacement member is narrowed, (c) is a figure of a displacement member. It is a figure which shows the case where the space | interval is expanded. It is the schematic which shows the adjustment method of the other locking force same as the above.

Explanation of symbols

1 Latch part 10 Latch bolt 11 Solenoid (control means)
12 Stopper (control means)
2 Catch Part 20 Catch 21 First Displacement Member 22 Second Displacement Member A Door B Door Frame

Claims (9)

  It has a latch part arranged on either the door or the door frame and a catch part arranged on either the door or the door frame, and the latch part moves in a direction perpendicular to the opening and closing direction of the door A latch bolt that is freely urged in a direction toward the catch portion, and a control unit that controls movement of the latch bolt by energization / non-energization, the catch portion engaging with the latch bolt; A displacement member that urges the catch in a direction toward the latch bolt. When the latch bolt is engaged with the catch, the control means prevents the latch bolt from moving, and the door is locked. A locking device in which a catch is displaced by applying a load greater than an urging force and the door is unlocked by disengaging the latch bolt and the catch, and the displacement member has at least two or more elasticity Locking device Jo member is characterized by comprising disposed at predetermined intervals.   The catch portion adjusts the amount of displacement from when the plate-like member first pressed by the catch is not displaced to when the plate-like member is pushed by the catch and exerts a force on the next plate-like member The locking device according to claim 1, further comprising an adjusting unit that performs the adjustment.   3. The locking device according to claim 2, wherein the catch portion includes a housing that accommodates the catch and the displacement member, and includes an operation unit that adjusts the displacement amount by an adjustment unit from the outside of the housing.   The locking device according to claim 2, wherein the adjusting unit adjusts the amount of displacement by an adjusting member provided between plate-like members.   The displacement member includes two plate-like members arranged at a predetermined interval, and the adjustment member is formed on a female screw portion that is provided in the thickness direction of the first plate-like member on the side away from the catch. 5. The locking device according to claim 4, further comprising a connecting screw that has a male screw portion to be screwed and is provided so as to penetrate in the thickness direction of the first plate-like member.   The displacement member includes two plate-like members arranged at a predetermined interval, and the adjustment member is provided on the first plate-like member on the side away from the catch, A fixing portion having a female screw portion penetrating in the thickness direction, a male screw portion screwed into the female screw portion, and having a diameter larger than that of the female screw portion penetrating in the thickness direction of the first plate member. 5. The locking device according to claim 4, further comprising a connecting screw that penetrates the through hole and the female screw portion of the fixing portion and projects so as to face the second plate-like member on the side close to the catch.   The locking device according to claim 6, wherein the first plate-like member is formed so that a portion in the vicinity of the through hole is wider than other portions.   The locking device according to claim 1, wherein the catch portion includes a support portion that supports the plate-like member, and includes a support position changing unit that changes an arrangement position of the support portion.   The locking device according to any one of claims 1 to 8, wherein the displacement member is formed by stacking a plurality of elastic plate-like members.

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