JP3720104B2 - Lock bolt length adjustment mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lock bolt length adjusting mechanism capable of adjusting the length of a back set of dead bolts and latch bolts.
[0002]
[Prior art]
Conventionally, an example of a lock protrusion adjusting device is disclosed in Japanese Utility Model Publication No. 2-33791. In this embodiment, basically, an adjusting screw, a slider screwed into the screw, a lock piece of a predetermined size having a plate piece coming into contact with the contact piece of the slider, and constantly urging the lock piece in the protruding direction. It is comprised by the spring member which does. However, the shortcomings of this embodiment are listed as follows.
(1) Since the length of the lock piece is a predetermined dimension, it is difficult or impossible to use if the backset of the lock box is different. That is, although the back set differs depending on the standard size of each lock box, one lock cannot be commonly used for each lock box with different back sets.
(2) If it is necessary to readjust the protruding amount of the lock in relation to “Chile”, first remove the front plate to expose the adjusting screw head, and then use a screwdriver to adjust the protruding amount of the lock. Must be adjusted. Therefore, it takes time and effort to readjust.
(3) Since the lock piece is always urged in the protruding direction by the spring force of the spring member and there is no means for preventing the adjustment screw from loosening, the lock piece has more vibrations and shocks than necessary. When is added, the amount of protrusion of the lock from the front plate changes.
(4) When adjusting the amount of protrusion of the lock piece from the front plate, the adjustment screw itself is not provided with a configuration that provides a “guideline” for the amount of rotation. In many cases, the adjustment action is repeated, such as rotating the screw left and right many times. Therefore, accurate adjustment cannot be easily performed.
[0003]
[Problems to be solved by the invention]
The problem of the present invention is that, in view of the drawbacks of the above-described conventional embodiments, one lock piece can be commonly used for each lock box having a different backset. When the amount of protrusion needs to be readjusted, the amount of protrusion can be adjusted easily and accurately, and the length of the lock bolt does not change due to vibration or impact during use. To get the mechanism.
[0004]
[Means for Solving the Problems]
The length adjusting mechanism of the lock bolt according to the present invention is provided in the lock box so as to be horizontally movable. When the rotator 26 rotates in one direction, the dead head 14 of the dead bolt 11 is moved to the front plate 5 of the lock box 1. In the length adjusting mechanism of the locking bolt protruding from the rear end surface of the dead fitting front end portion 12 formed separately and having the dead head portion 14 is engaged with the rotor 26. A dead bolt 11 composed of two fitting articles 12 and 13 that are slidably fitted so that no “gap” is formed between the front end surface of the dead fitting rear end portion 13 having the engaging portion 22, and the dead bolt 11. A backset adjustment bolt 30 that is inserted and screwed into the bolt 11 in the protruding and retracting direction and rotated by a driver's operation, and the dead fitting of the dead bolt 11 so as to be always in pressure contact with the outer peripheral wall of the backset adjustment bolt tip 12 And backset adjustment bolt loosening prevention member 40 is decorated, provided on the backset adjustment bolt, and characterized in that it consists of regulating member 37 for the regulating the dead fitting tip 12 in place.
[0005]
In the above configuration, a latch bolt may be used instead of the dead bolt. In this case, the lock bolt length adjusting mechanism is formed separately, and includes a rear end surface of the latch fitting front end portion 12A having the latch head portion 14A and an engaging portion 22A that engages the rotator 26A. A latch bolt 11A composed of two fitting articles 12A and 13A that are slidably fitted so that no "gap" is formed between the front end surface of the latch fitting rear end portion 13A and the latch bolt 11A. A backset adjustment bolt 30A that is inserted and screwed in the protruding and retracting direction and rotated by the operation of a driver, and a latch fitting tip 12A of the latch bolt 11A so as to be always in pressure contact with the outer peripheral wall of the backset adjustment bolt. The loose set prevention member 40A for the back set adjustment bolt and the back set adjustment bolt provided in the interior, and the latch fitting tip 12A is restricted to a predetermined position. Consisting of that regulation member 37..
[0006]
“Backset” refers to the lengths L and L1 from the center of the shaft 29 of the operating member that rotates the rotors 26 and 26A to the front surfaces of the front plates 5 and 5A of the lock box 1 and 1A.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention shown in the drawings will be described in relation to a lock box embedded in an opening / closing side end portion of a door.
[0008]
1 to 7 show a first embodiment of a lock bolt length adjusting mechanism 10 incorporated in the lock box 1. First, the lock box 1 will be described. The lock box 1 is embedded in the opening at the opening and closing side end portion of the door so as to face an engaging bracket (troyoke or strike) provided on a door frame (not shown).
[0009]
Reference numeral 2 denotes a guide pin protruding at an appropriate location on the vertical wall 3 of the lock box 1. The guide pin 2 may be provided on the latch bolt side described later depending on the design. In this case, a horizontal slot for guide is formed on the lock box 1 side. In the vertical wall 3, other mounting holes, fitting holes and the like are appropriately formed, but are omitted for convenience.
[0010]
Reference numeral 4 denotes a front end plate of the lock box 1, and a front plate 5 is integrally attached to the front end plate 4 via a plurality of mounting screws 6. Thus, through holes 7 for dead bolts are formed in the front plate 5 and the front end plate 4 at a central portion or a portion near the central portion. Next, the lock bolt length adjusting mechanism 10 will be described. The lock bolt length adjusting mechanism 10 is basically formed as a separate body, and between the rear end surface of the dead fitting front end portion 12 and the front end surface of the dead mating rear end portion 13. A dead bolt 11 composed of two fitting articles 12 and 13 that are fitted so that no “gap” is generated , and is inserted into and screwed into the dead bolt 11 in the protruding and retracting direction, and is rotated by the operation of the driver. A backset adjustment bolt 30, a loosening prevention member 40 for the backset adjustment bolt 30, which is housed in the dead bolt 11 so as to be in constant pressure contact with the outer peripheral wall of the backset adjustment bolt 30, and the backset adjustment bolt 30 are provided. And a regulating member 37 that regulates the dead fitting front end 12 to a predetermined position. Hereinafter, each of these members will be described in order.
[0011]
First, as described above, the dead bolt 11 is composed of two fitting articles, that is, a convex fitting portion and a concave fitting portion. In this embodiment, the dead bolt 11 passes through the through holes 7 of the front plate 5 and the front end plate 4. Alternatively, it is composed of a convex dead fitting front end portion 12 protruding and retracting from the front plate 5 and a concave dead mating rear end portion 13 slidably fitted to the dead fitting front end portion 12. In this case, depending on the design, the dead fitting front end portion 12 may be formed on the concave side, while the dead fitting rear end portion 13 may be formed on the convex side.
[0012]
The dead fitting front end 12 will be described below. Reference numeral 14 denotes a square dead head that protrudes from the front plate 5 by the horizontal movement of the dead bolt 11 when the door is closed. A large-diameter first through hole 15 is formed in the axis direction of the dead head 14. In the radial direction of the dead head 14, a storage small hole 16 that intersects with the through hole 15 from one side wall is formed. Reference numeral 17 denotes a rectangular fitting convex portion provided in a small-diameter block shape behind the dead head portion 14. The fitting convex portion 17 communicates coaxially with the through-hole 15 in the axial (advance / retreat) direction. A second through hole 18 having a small diameter is formed.
[0013]
Further, the dead fitting rear end 13 will be described. Reference numeral 19 denotes a fitting concave portion having a square fitting hole 20 in which the fitting convex portion 17 of the dead fitting front end portion 12 is slidably fitted on the front side. . In the axial (advance and retreat) direction of the fitting recess 19, a female screw 21 for a backset adjusting bolt 30 that is coaxially connected to the through holes 15 and 18 of the dead fitting tip 12 and communicates with the fitting hole 20 is formed. ing. Reference numeral 22 denotes a plate-like engaging portion that is integrally fixed to the rear of the fitting concave portion 19. The engaging portion 22 is formed with a horizontal guide hole 23 that engages with the guide pin 2 of the lock box. In addition, in this embodiment, a notch portion 25 having tapered locking surfaces 24 and 24 facing the lower side portion is formed. By the way, based on FIGS. 1, 5, etc., the fitting relationship between the fitting convex portion 17 and the fitting concave portion 19 will be described. Dead fitting tip portion 12 (an article having a dead head portion 14 and a fitting convex portion 17. ) And a dead fitting rear end portion 13 (an article having an engagement portion 22 engaged with the fitting recess 19 and the rotor 26) that slide-fits with the dead fitting front end portion 12. The dead bolt 11 is configured so that the inner end surface of the fitting convex portion 17 (in the embodiment, the inner end surface of the fitting convex portion 17 connected to the dead head 14) enters the fitting hole 20 of the fitting concave portion 19. The fitting projection 17 is slidable with respect to the inner wall surface of the fitting recess 19 . Therefore, in the dead bolt 11 , there is no “gap” between the rear end surface of the dead fitting front end portion 12 formed separately and the front end surface of the dead mating rear end portion 13.
[0014]
Reference numeral 26 denotes a rotator (for example, dharma) incorporated in the lock box 1, and the rotator 26 has a square or non-circular center engaging hole 27, and the engaging portion 22 of the dead bolt 11. A drive arm 28 that engages the locking surface 24 is included.
[0015]
Thus, a shaft 29 such as a thumb turn or a square of an operation member such as a key cylinder engages with the center engaging hole 27 of the rotor 26.
[0016]
Next, the backset adjustment bolt 30 will be described. Here, “backset” refers to a length L from the center of the shaft 29 of the operating member that rotates the rotator 26 to the front surface of the front plate 5 of the lock box 1, as shown in FIG. 3. In this embodiment, the backset L is performed by adjusting the length of the screwed portion of the backset adjusting bolt 30 with respect to the female screw 21 of the dead fitting rear end portion 13. Therefore, the length of the dead bolt 11 as a lock piece can be matched with the back set L of the lock box 1.
[0017]
Reference numeral 31 denotes an engaging head, and an engaging groove 31a for engaging a “plus” or “minus” driver (not shown) is formed on the front surface of the engaging head 31. 32 is an abutting portion continuously provided behind the engaging head 31. As shown in FIG. 7, the outer peripheral surface of the abutting portion 32 is formed in a polyhedral shape such as a pentagon, a hexagon, and an octagon. Yes. Reference numeral 33 denotes a large-diameter portion extending rearward of the contact portion 32, and the large-diameter portion 33 rotates together with the engagement head portion 31 and the contact portion 32 to the first through hole 15 of the dead fitting distal end portion 12. Inserted as possible. Reference numeral 34 denotes a small-diameter portion that extends rearward of the large-diameter portion 33, and the small-diameter portion 34 is rotatably inserted into the second through hole 18 of the dead fitting distal end portion 12. Reference numeral 35 denotes a male screw extending rearward of the small diameter portion 34 and screwed into the female screw 21 of the dead fitting rear end portion 13.
The male screw 35 protrudes from at least the end face of the end portion 13 after dead fitting. Reference numeral 36 denotes a circumferential groove formed at the flange of the male screw 35 and the small diameter portion 34.
[0018]
37 is a restriction that restricts the dead fitting tip 12 from moving in the axial direction of the backset adjusting bolt 30 when the backset adjusting bolt 30 is inserted through the through holes 15 and 18 of the dead bolt 11. It is a member. In this embodiment, an E-ring shaped stop ring 37 is used. The retaining ring 37 is fitted in the circumferential groove 36 of the backset adjusting bolt 30 and comes into contact with the end surface of the fitting convex portion 17 of the dead fitting front end portion 12. Therefore, the backset adjustment bolt 30 does not come off from the dead fitting tip 12 of the dead bolt 11 and can be rotated without moving in the front-rear direction within the dead fitting tip 12.
[0019]
Next, the loosening prevention member 40 will be described. The loosening prevention member 40 is incorporated in the storage small hole 16 of the dead head 14 of the dead fitting tip 12. Thus, reference numeral 41 denotes a pressure contact body that is in pressure contact with the contact portion 32 of the backset adjustment bolt 30. The press contact body 41 is formed in a sphere or a bullet shape. Reference numeral 42 denotes a spring that constantly biases the pressure contact body 41 in the direction of the contact portion 32. Instead of the spring 42, a sponge-like elastic body may be used. Reference numeral 43 denotes a lid that closes the small accommodation hole 16 so as to receive the elastic body or elastic body 42, and the lid 43 is fixed to the dead head 14 by caulking.
[0020]
Therefore, in this embodiment, the loosening prevention member 40 includes a spring 42 housed in the storage small hole 16 of the dead head 14 and the outer peripheral surface of the contact portion 32 of the backset adjustment bolt 30 by the spring force of the spring 42. It consists of a pressure contact ball 41 that is in pressure contact with one selected (adjusted) surface.
[0021]
As described above, there are various back sets L depending on the standard dimensions of the lock box. Therefore, if the dead bolt 11 having the above configuration is incorporated in the desired lock box 1 and the rotor 26 is rotated in the unlocking direction as shown in FIG. 3, the drive arm 28 is positioned on the right side. When the dead head 14 of the dead bolt 11 protrudes somewhat from the front plate 5, the length of the dead bolt 11 needs to be adjusted.
[0022]
Accordingly, the driver is engaged with the engagement groove 31a of the engagement head 31 of the backset adjustment bolt 30, and the backset adjustment bolt 30 is rotated in a desired direction. At this time, the backset adjustment bolt 30 rotates at a fixed position in the dead fitting front end portion 12. And if the screwing part with respect to the internal thread 21 of the dead fitting rear end part 13 of the backset adjustment bolt 30 becomes short, the protrusion amount of the dead head 14 will become large, and conversely the threading part with respect to the internal thread 21 will become long. Thus, the protruding amount of the dead head 14 is reduced. Therefore, in FIG. 3, the backset L is adjusted by making the screwed portion of the backset adjustment bolt 30 longer than the female screw 21 of the dead fitting rear end 13 to adjust the backset L and the leading end surface of the dead head 14 and the lock. The front surface of the front plate 5 of the box 1 matches.
[0023]
By the way, when the backset adjusting bolt 30 is rotated in an arbitrary direction by a driver, the pressure contact body 41 of the loosening prevention member 40 is temporarily retracted against the elastic (elastic) force of the elastic body or the elastic body 42. When the backset adjustment bolt 30 is stopped, the pressure contact body 41 is in point or surface contact with a selected one of the outer peripheral surfaces of the multi-surface contact portion 32, so that the backset adjustment bolt 30 is easy. Will not loosen.
[0024]
In the above description of the embodiment, it has been described that the regulating member 37 for the dead fitting tip 12 is an E-ring shaped stop ring. However, as shown in FIGS. It may be. That is, the restricting member 37A is an annular elastic body having a notch 38 in the radial direction, and the elastic body 37A is a fitting hole formed in the rear end face of the fitting convex portion 17 of the dead fitting tip 12. As shown in FIG. 9, when the back adjustment bolt 30 is inserted into the dead fitting front end portion 12 in a penetrating state, the regulating member 37A has its center against the elastic force of the material itself. The opening is opened, and as a result, the restricting member 37 </ b> A is engaged with the circumferential groove 36 of the backset adjustment bolt 30. Therefore, in this embodiment, the same effect as that of the restricting member 37 described above is obtained, and furthermore, the restricting member 37A is housed in the fitting hole 39 of the dead fitting front end portion 12, so that it does not interfere with the adjustment. There is an effect to say.
[0025]
Different Embodiments of the Invention
Next, different embodiments of the present invention will be described. In describing the different embodiments, the same parts in the configuration of the invention are given the same reference numerals as those in the embodiments of the invention, or the same reference numerals, and duplicated explanations are given. Omitted.
[0026]
First, in FIG. 10 and FIG. 11, reference numerals are attached to main components. 1A is a lock box, 5A is a front plate, 10A is a lock bolt length adjusting mechanism, 11A is a latch bolt, and 12A is a latch fitting. Joint end portion, 13A is a latch fitting rear end portion, 14A is a latch head portion, 17A is a fitting convex portion, 19A is a fitting concave portion, 22A is a vertical plate-like engaging portion, 23A is not an engaging portion, A horizontal long hole formed at the rear end of the latch fitting, 26A is a rotator, 30A is a backset adjustment bolt, 40A is a loosening prevention member for the backset adjustment bolt, 50 is a latch bolt 11A and a front plate of the lock box 1A. A biasing spring that always biases so as to protrude from 5A, 51 is a return spring that biases a rotator 26A that is rotated by an operation member (knob or lever handle) (not shown), and 52 is a stopper portion of the rotator 26A. It is.
[0027]
Therefore, in the example of this embodiment, the lock bolt length adjusting mechanism 10A is different from the example of the above embodiment in that the length of the back set L1 of the latch bolt 11A is adjusted. The adjustment in this case is not only the backset adjustment, but also the amount of protrusion of the latch head 14A from the front plate 5A is adjusted in consideration of the relationship with “Chile” in particular.
[0028]
In the embodiment of the present invention, the first example for adjusting the length of the backset L of the dead bolt 11 and the second example for adjusting the length of the backset L1 of the latch bolt 11A Are divided into a lock box 1 and a lock box 11A, respectively, but the length adjusting mechanisms 10 and 10A of both lock bolts are appropriately incorporated at the upper and lower positions in one lock box with a required interval. But of course.
[0029]
【The invention's effect】
As is clear from the above description, the present invention has the following effects.
(1) One lock piece can be commonly used for each lock box having a different backset. In this case, the “backset” can be easily adjusted.
(2) When it is necessary to readjust the protruding amount of the latch bolt 11A in relation to “Chile”, it is not necessary to remove the front plate from the lock box, so the protruding amount of the latch bolt 11A is easily adjusted. Can do.
(3) Since the back-set adjusting bolt loosening prevention member 40 is provided, the length of the locking bolt does not easily change due to vibration or impact during use.
(4) In the embodiment described in claim 2, accurate adjustment of the locking bolt can be easily performed.
[Brief description of the drawings]
1 to 7 are explanatory views for explaining embodiments of the present invention. 10 and 11 are explanatory diagrams for explaining different embodiments of the present invention.
FIG. 1 is an explanatory diagram for explaining an embodiment (unlocked state).
FIG. 2 is an explanatory diagram for explaining an embodiment (locked state).
FIG. 3 is an explanatory diagram of length adjustment of a backset L in a dead bolt.
FIG. 4 is an exploded perspective view of a dead bolt length adjusting mechanism.
FIG. 5 is an explanatory diagram of a combination state in FIG. 4;
FIG. 6 is a perspective view of a main part.
7 is an enlarged sectional view taken along line 7-7 in FIG. 6;
FIG. 8 is an exploded perspective view of another embodiment of a restricting member.
FIG. 9 is a schematic cross-sectional explanatory view of the coupling in FIG. 8;
FIG. 10 is an explanatory diagram (latch bolt) for explaining a different embodiment;
FIG. 11 is an exploded perspective view of a latch bolt length adjusting mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 1A ... Lock box 5, 5A ... Front plate 10, 10A ... Lock bolt length adjustment mechanism, 11 ... Dead bolt, 11A ... Latch bolt, 12 ... Latch fitting tip 12A ... Latch fitting tip 13A ... Latch fitting rear end 13A ... Latch fitting rear end, 14 ... Latch head 14A ... Latch head, 17, 17A ... Fitting projection, 19, 19A ... Fitting recess, 20 ... Fitting Joint hole, 21 ... female screw, 22, 22A ... engaging portion, 26, 26A ... rotator, 30, 30A ... backset adjustment bolt, 31 ... engaging head, 32 ... contact portion, 35 ... male screw, 36 ... circumferential groove, 37, 37A ... regulating member, 38 ... notch, 39 ... fitting hole, 40, 40A ... loosening prevention member, 41 ... pressure contact body, 42 ... spring, L, L1 ... backset.

Claims (4)

In the lock bolt length adjusting mechanism, which is provided in the lock box so as to be horizontally movable and the dead head 14 of the dead bolt 11 protrudes from the front plate 5 of the lock box 1 when the rotator 26 rotates in one direction. And a dead fitting rear end portion 13 having a rear end surface of the dead fitting front end portion 12 formed separately and having the dead head portion 14 and an engaging portion 22 with which the rotor 26 is engaged. A dead bolt 11 composed of two fitting articles 12 and 13 that are slidably fitted so that no "gap" is formed between them, and is inserted and screwed into the dead bolt 11 in the protruding and retracting direction, and , a backset adjustment bolt 30 which rotates by the driver of the operation, for backset adjustment bolt the decorated dead fitting tip 12 of the dead bolt 11 so as to constantly press contact with the outer peripheral wall of the backset adjustment bolt And viewed prevention member 40, provided on the backset adjustment bolt and the dead fitting the tip 12 is restricted to a predetermined position regulating member 37. Tablets bolt length adjusting mechanism, characterized in that it consists of.   2. The backset adjusting bolt 30 according to claim 1, wherein an engagement head 31 having an engagement groove 31a with which a driver engages on the front surface, a rear side of the engagement head 31, and an outer periphery. A contact portion 32 having a multi-faceted surface, a large diameter portion 33 extending behind the contact portion 32, a small diameter portion 34 extending behind the large diameter portion 33, and a rear side of the small diameter portion 34 And a length adjustment mechanism for the locking bolt, wherein the male screw 35 is screwed into the female screw 21 of the rear end 13 of the dead fitting.   In Claim 1, the restricting member 37A is an annular elastic body having a notch 38 in the radial direction, and the elastic body 37A is formed on the rear end face of the fitting convex portion 17 of the dead fitting front end portion 12. A locking bolt length adjusting mechanism, wherein the locking bolt is fitted into the fitting hole 39. It is provided in the lock box so that it can move horizontally, and when the rotator rotates in one direction, the latch bolt's latch head protrudes from the front plate of the lock box. Between the rear end surface of the latch fitting front end portion 12A formed and having the latch head portion 14A and the front end surface of the latch fitting rear end portion 13A having the engaging portion 22A with which the rotor 26A is engaged. The latch bolt 11A is composed of two fitting articles 12A and 13A that are slidably fitted so that no “gap” is generated , and is inserted and screwed into the latch bolt 11A in the protruding and retracting direction. backset adjustment bolt 30A and, backset adjustment bolt that is furnished to the latch engaging the tip portion 12A of the latch bolt 11A so as to constantly press contact with the outer peripheral wall of the backset adjustment bolts dynamic A loosening prevention member 40A, provided on the backset adjusting bolt, and the length adjustment mechanism of the lock bolt, characterized in that it consists of regulating member 37 for the regulating the latch fitting tip 12A to a predetermined position.

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