JP4137905B2 - Sickle tablets - Google Patents

Description

  The present invention relates to a sickle lock in which a sickle piece is attached to a dead bolt that appears and disappears from a lock surface.

  As a general locking device attached to the entrance door, etc., strike bolts with dead bolts (main fastening bolts) appearing in the horizontal direction from the lock surface by thumb turn or key cylinder operation and protruding dead bolts attached to the door frame A so-called box lock, which is a combination of a main lock that engages with a receiving hole and a latch lock for temporary tightening that causes a latch bolt to appear and retract by operating a door knob or a door handle, is widely used. However, in recent years, crimes such as inserting a bar between the door and the door frame and forcibly breaking them have increased. To prevent this, sickle locks with sickle pieces incorporated into dead bolts (sickle type) Various locks with dead bolts have been proposed.

  FIG. 5 is a diagram showing a part of the sickle lock described in Patent Document 1. As shown in FIG. (A) shows an unlocked state, (b) shows a locked state, respectively. In both figures, reference numeral 91 denotes a dead bolt, and reference numeral 92 denotes a rotating member that rotates in conjunction with the locking / unlocking operation. A cam 93 for projecting and retracting the dead bolt 91 is formed at one end of the rotating member 92, and this cam 93 is engaged with a cam receiving portion 94 formed on the dead bolt 91 so that the dead bolt 91 is It is configured to slide in the direction.

The dead bolt 91 has a substantially U-shaped end surface viewed from the lock surface side, and a hook-shaped sickle piece 95 is incorporated inside the dead bolt 91. The sickle piece 95 is pivotally supported around a shaft member 96 that penetrates the dead bolt 91 in the width direction. When the dead bolt 91 protrudes from the lock surface, the sickle piece 95 rotates clockwise in conjunction with this. The sickle-shaped protrusion 97 at the tip is protruded upward. Since the protruding sickle-shaped protrusion 97 engages with the receiving hole of the strike 98, for example, even if an attempt is made to pry the gap between the door and the door frame with a bar or the like, this does not easily come off, and the illegal breaking Can be prevented.
JP 2001-164808 A

  The conventional sickle lock incorporates a sickle piece inside a dead bolt having a substantially U-shaped vertical cross section, so when, for example, when the periphery of the door is washed with water or when condensation occurs near the lock surface, Moisture may enter the inside of the deadbolt and accumulate on the inner surface or bottom of the deadbolt. The present applicants have confirmed that in cold regions, the water accumulated inside the deadbolt may freeze, hindering the rotation of the sickle piece and hindering the locking and unlocking operation.

  Therefore, the present invention provides a technique for preventing water from accumulating inside the dead bolt and freezing in a sickle lock in which a sickle piece is incorporated in the dead bolt.

  In the present invention, on the tip side of the dead bolt that appears and disappears from the lock surface, a concave portion having a substantially groove-shaped longitudinal section opening upward is formed, and a sickle piece having a sickle-like projection at the tip is accommodated in the concave portion, In a sickle lock that is pivotally supported so that it can rotate in the vertical direction around a shaft member that penetrates the dead bolt in the width direction, it descends from the vicinity of the bottom of the shaft member toward the tip of the dead bolt on the bottom surface of the recess An inclined drainage gradient is provided, and a drain hole that penetrates the bottom of the dead bolt in the vertical direction is formed at a downstream position of the drainage gradient.

  According to the present invention, most of the water that has entered the concave portion of the dead bolt is naturally discharged from the drain hole formed in the bottom portion of the dead bolt, so that the water is accumulated inside the dead bolt for a long time. This prevents the sickle piece from being hindered by freezing of the accumulated water.

  In the above invention, if a convex strip extending along the drainage gradient is formed in the approximate center of the bottom surface of the concave portion, the contact area between the sickle piece and the concave portion in the accommodated state is reduced, and therefore, due to the surface tension at the contact portion. Moisture retention is reduced, and drainage along the drainage gradient is performed more smoothly.

  Further, the present invention provides a clearance of at least 0.5 mm on each side between the inner surface of the recess and the outer surface of the sickle piece, and a bearing ring made of a lubricating resin on the shaft member that pivotally supports the sickle piece. It is characterized by being fitted.

  The clearance between the inner surface of the dead bolt and the outer surface of the sickle piece in a conventional sickle tablet is about 0.2 mm, but the surface tension is increased in this gap by expanding this clearance to 0.5 mm or more on both sides. Therefore, it is possible to reduce the amount of water that remains, and smooth drainage is promoted.

  The reason why the bearing ring is fitted to the shaft member that supports the sickle piece is to prevent the sickle piece from being biased to one side within the recess of the dead bolt by providing the above-mentioned clearance. If it is molded with resin, it is possible to prevent freezing and rusting around the shaft hole where moisture tends to stay, making it possible to always smoothly rotate the sickle piece.

  Further, if a fluororesin coating is applied to at least one of the inner surface of the dead bolt and the outer surface of the sickle piece, the drainage performance is further improved by the water repellent effect.

  According to the sickle lock of the present invention configured as described above, the water that has entered the recess of the dead bolt is smoothly discharged from the drain hole and does not accumulate inside the dead bolt for a long time. Therefore, it can prevent that the water | moisture which stayed freezes and causes the operation | movement inhibition of a sickle piece, and it can also prevent that rust generate | occur | produces inside a dead bolt. And by these, the smooth rotation of a sickle piece is ensured over a long period of time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an overall configuration of a box lock 1 incorporating a sickle lock 10 according to an embodiment of the present invention. The box lock 1 includes a dead bolt 2 that protrudes and protrudes from the lock surface of the lock case 11 by the operation of the key cylinder or the thumb turn, and a reversible latch bolt 3 that can protrude and retract from the lock surface by pushing and pulling the door handle. I have. 1A shows an unlocked state, FIG. 1C shows a locked state, and FIG. 1B shows an intermediate state thereof.

  A rotating member 12 that rotates in conjunction with the key cylinder or thumb turn locking / unlocking operation is attached to the lock case 11. A cam 13 for projecting and retracting the dead bolt 2 protrudes from one end of the rotating member 12, and the cam 13 is a cam receiver having a substantially U shape in side view formed on the rear end side of the dead bolt 2. The part 21 is engaged. Further, a long hole 22 extending in the protruding and retracting direction of the dead bolt 2 is formed on the rear end side of the dead bolt 2 so as to penetrate the dead bolt 2 in the width direction. A guide pin 14 protruding from the lock case 11 is engaged with the long hole 22.

  A hook-shaped sickle piece 4 having an upward sickle-like projection 41 at the tip is incorporated on the leading end side of the dead bolt 2. The sickle piece 4 is housed in a recess 5 having a substantially longitudinal cross section formed in the dead bolt 2 and is pivotally supported around a shaft member 23 that penetrates the dead bolt 2 and the sickle piece 4 in the width direction. ing. The detailed shape of the recess 5 will be described later with reference to FIGS. At the position above the shaft member 23 in the sickle piece 4, a flip-up protruding piece 42 for rotating the sickle piece 4 to project the sickle-shaped protrusion 41 is formed, and the jumping-up protruding piece 42 is a dead bolt. 2 protrudes above.

  When the rotating member 12 is rotated clockwise in the drawing from the unlocked state of (a), the cam 13 engaged with the cam receiving portion 21 of the dead bolt 2 moves the dead bolt 2 to the left in the drawing. At this time, the sickle piece 4 remains falling in the recess 5 of the dead bolt 2 due to its own weight.

  When the dead bolt 2 is pushed out and its tip reaches the inside of the receiving hole 61 of the strike 6, as shown in (b), the flip-up protrusion 42 formed on the sickle piece 4 is a front plate of the lock case 11. 15, the sickle piece 4 is rotated in the clockwise direction by the reaction. Then, the sickle-shaped protrusion 41 is flipped up and engaged with the back side of the receiving hole 61 of the strike 6, and the locked state shown in FIG. At the time of unlocking, the operation of rotating the rotating member 12 counterclockwise as shown in the drawing causes the sickle piece 4 to fall into the recess 5 of the dead bolt 2 while the dead bolt 2 is pulled back into the lock case 11, thereby opening the door. It becomes possible.

  The mechanism for reversing and projecting the latch bolt 3 is not a main part of the present invention, and a known conventional technique can be used as appropriate. Therefore, detailed description thereof is omitted.

  2 to 4 show the detailed structure of the deadbolt 2. The recess 5 that accommodates the sickle piece 4 is open upward in the substantially half of the tip end side of the dead bolt 2 so that the longitudinal section in the width direction (left and right direction in FIGS. 3 and 4) forms a substantially groove shape. . The opening width of the recess 5 is substantially constant, and the left and right inner surfaces of the recess 5 are substantially vertical. In the illustrated embodiment, the concave portion 5 is also opened at the distal end side of the dead bolt 2 in order to substantially align the sickle-shaped protrusion 41 of the sickle piece 4 and the distal end surface of the dead bolt 2, but toward the distal end side. The opening is substantially in the upper half, and a bridging portion 24 that integrates the dead bolt 2 in the width direction is left at the lower end of the tip of the dead bolt 2. By providing this bridging portion 24 at the tip of the deadbolt 2, the strength of the deadbolt 2 itself is ensured, and a solid feeling is also increased in a visual impression when the deadbolt 2 is viewed from the tip side. When the sickle-shaped protrusion 41 of the sickle piece 4 is protruded from a position slightly retracted from the front end surface of the dead bolt 2, the concave portion 5 is not opened on the front end side of the dead bolt 2, and the bridge portion 24 is dead. It may be formed over the entire height of the bolt 2.

  As shown in FIG. 2 (b), the longitudinal cross section of the recess 5 in the axial direction (the direction in which the deadbolt 2 protrudes) is such that a substantially vertical rear wall surface 51 continues from the lower part to the middle horizontal plane 52 through a curved surface. The middle horizontal plane 52 is formed so as to continue from the lower position of the shaft member 23 to the inclined bottom surface 53 inclined downward toward the distal end side of the dead bolt 2. The slope of the inclined bottom surface 53 is set to about 1/3 to 1/1, and a drain hole 54 penetrating the bottom of the dead bolt 2 in the vertical direction is formed at the downstream position. The opening width of the drain hole 54 is substantially the same as the opening width of the recess 5.

  In this way, by providing the slope for drainage and the drain hole 54 on the bottom surface of the recess 5, most of the water that has entered the recess 5 is naturally discharged. Furthermore, the drainage gradient is provided so as to incline downward toward the tip side of the dead bolt 2, and the water drain hole 54 is formed near the tip of the dead bolt 2, so that the water drained from the drain hole 54 can be removed from the lock case. It is also possible to prevent the situation of re-entering into the area 11.

  Furthermore, a ridge 55 extending along the drainage gradient is formed in the approximate center of the oblique bottom surface 53. The ridge 55 serves to reduce the contact area between the sickle piece 4 and the oblique bottom surface 53 in the accommodated state. By reducing the contact area, moisture retention due to surface tension at the contact portion can be further reduced, and drainage along the drainage gradient of the inclined bottom surface 53 can be performed more smoothly.

  As shown in FIG. 2A, the shaft member 23 that pivotally supports the sickle piece 4 penetrates the sickle piece 4 and the dead bolt 2 in the width direction, but moisture is accumulated around the shaft member 23. It is necessary to prevent freezing and rusting. Therefore, in the sickle lock 10 of the present invention, clearances d of about 0.5 mm to 0.8 mm are provided between the inner surface of the recess 5 and the outer surface of the sickle piece 4, and the shaft member 23 is lubricated. A bearing ring 25 made of resin is fitted.

  The bearing ring 25 includes a cylindrical sleeve 26 having a cylinder length that is approximately half the width of the sickle piece 4 and a disk-shaped flange 27 protruding from one end of the sleeve 26, and the sleeve 26 is a shaft member. 23 and a shaft hole formed in the sickle piece 4. The flange 27 is formed so that its thickness matches the clearance d provided between the inner surface of the recess 5 and the outer surface of the sickle piece 4, and is sandwiched between the recess 5 and the sickle piece 4. Yes. With such a configuration, it is possible to prevent the sickle piece 4 from being biased to one side in the recess 5, and it is also possible to prevent freezing and rusting around the shaft member 23 where water tends to stay. 4 can be rotated smoothly.

  As the lubricating resin used as the molding material of the bearing ring 25, those having a low coefficient of friction and aggressiveness against a contact partner material and excellent in wear resistance and water resistance are preferable. For example, polyacetal, polyolefin resin, polyamide resin, Phenolic resins, polycarbonate-based resins and the like can be mentioned, but besides these, similar resins used for gears and bearing parts of general machinery can be used.

  Further, by applying a fluororesin coating on at least one of the inner surface of the dead bolt 2 and the outer surface of the sickle piece 4, the water drainage from the recess 5 is further improved by the water repellent effect.

It is a side view which shows the whole structure of the box lock incorporating the sickle lock which concerns on embodiment of this invention, Comprising: (a) is an unlocked state, (c) is a locked state, (b) shows the intermediate state. It is the cross-sectional view and longitudinal cross-sectional view which show the structure of the dead bolt in the said sickle tablet, Comprising: (a) shows A-A 'cross section, (b) shows B-B' cross section. It is the front view which looked at the dead bolt shown in FIG. 2 from the front end side. FIG. 3 is a C-C ′ sectional view of the dead bolt shown in FIG. 2. It is a side view which shows a part of sickle lock which concerns on a prior art, Comprising: (a) shows an unlocked state, (b) shows a locked state.

Explanation of symbols

10 Sickle lock 2 Dead bolt 23 Shaft member 25 Bearing ring 4 Sickle piece 41 Sickle-shaped protrusion 5 Recess 53 Slanted bottom surface 54 Drain hole 55 Convex d clearance

Claims (4)

A concave portion having a generally longitudinal groove shape that opens upward is formed on the leading end side of the dead bolt that protrudes and protrudes from the lock surface. In the sickle lock that is pivotally supported so that it can rotate in the vertical direction around the shaft member penetrating in the direction,
The bottom surface of the recess is provided with a drainage gradient that slopes downward from the vicinity of the shaft member toward the tip of the deadbolt. A sickle tablet characterized by   The sickle tablet according to claim 1, wherein a ridge extending along a drainage gradient is formed at substantially the center of the bottom surface of the recess.   A clearance of at least 0.5 mm on each side is provided between the inner surface of the recess and the outer surface of the sickle piece, and a bearing ring made of a lubricating resin is fitted to the shaft member that pivotally supports the sickle piece. The sickle tablet according to claim 1 or 2.   The sickle tablet according to claim 1, 2, or 3, wherein a fluororesin coating is applied to at least one of the inner surface of the dead bolt and the outer surface of the sickle piece.

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