JPH074122A - Lever operation type locking device - Google Patents

Abstract

PURPOSE: To avoid damages by providing a roll back stopping means that cooperates with a locking means unlocked state, so as to restrict rotational movement of a rollback for preventing a retractor from moving excessively in a latch bolt-retracting direction. CONSTITUTION: When a lock rotary member 90 is at an unlocked position, a tail part 94 of the lock rotary member 90 is positioned between abutment part 100 formed by tooth-like protrusions 98 of an outer rollback 32. Then, the abutment parts 100 cooperate with the tail part 94 and rotational movement of the outer rollback 32 with respect to the lock sleeve 24 is restricted within the lock sleeve 24. Then, the abutment parts 100 are separated away, so that a latch bolt can be retracted sufficiently in either directions of an outer operation lever 36. Before on of the abutment parts 100 is engaged with the tail part 94 and a retractor 64 make an excessive backward movement, the lever 36 is prevented from making further rotation, so that the retractor 36 is prevented from engaging with the rear wall of a retractor housing 56. By this constitution, the lock is prevented from being damaged by an excessive operation force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a locking device, and more particularly to improvement of a lever-operated cylindrical locking device having an opening / closing function.

[0002]

2. Description of the Related Art In a conventional lock device to which the present invention relates, an operating lever imparts rotational movement to a rollback, and the rollback cam-engages a retractor to move an idle tightening bolt from a latch position to a release position. Such a locking device also has a locking mechanism for preventing rotational movement of the outer operating lever and rollback when the locking device is in its locked state.

[0003]

Although the actuating lever has mechanical advantages, the mechanism for locking the actuating lever against rotation is such that it can withstand the high torsional forces that may result from violent acts or forced assaults. Required to do. However, when the locking device is released and in its normal operating state, the rotational force applied to the operating lever is
It is transmitted to the retractor via the mutually engageable surfaces of the rollback and the retractor. By violent operation or violent action that will apply excessive force to the operating lever,
The retractor is moved past its normal blank tightening bolt retracted position and is also caught in the retractor housing, damaging the retractor and / or the interlocking cam surfaces of the retractor and rollback to permanently lock the locking device. Causing permanent damage and immobilizing the blank tightening bolt in its retracted position. The present invention solves this problem. Therefore, the present invention generally includes a part of a locking mechanism provided on the outer rollback for fixing the outer operating lever, in order to prevent opening and closing functions and transmission of excessive operating force to the retractor mechanism. It is an object to provide an improved locking device having cooperating means.

[0004]

SUMMARY OF THE INVENTION An improved lock assembly according to the present invention includes a blanking bolt, a housing assembly having a housing and a tubular sleeve protruding from the housing, and a housing between the extended and retracted positions. A retractor movably supported by the housing, and in response to the retractor moving to the retracted position,
It has means for connecting the idle tightening bolt to the retractor to move it from the latch position to the release position.When the retractor is in its protruding position, it freely moves between the latch position and the release position, and the idle tightening bolt Further supported by a locking assembly movably between a locking position and a releasing position, locking means for locking the rollback against rotational movement in the locking position relative to the sleeve, and the sleeve of the lockback. A rollback stop means for cooperating with the locking means when the locking means is in the unlocked state in order to limit the rotational movement relative to the locking means and thereby prevent excessive movement of the retractor in the retracting direction of the blank tightening bolt. Have.

[0005]

1 and 2, a cylindrical locking device embodying the present invention is indicated generally by the numeral 10, and the cylindrical locking device is basically It is composed of an air-tightening bolt unit indicated by 12 and an operating unit indicated by 14 as a whole. The illustrated lock device 10 has an opening / closing function, and FIG. 1 shows the lock device 10 attached to an inward opening door. The air-tightening bolt unit 12 is substantially the same as the conventional one, and has a spring-tightening air-tightening bolt 16 and a spring-tightening auxiliary bolt 18 housed in a cylindrical housing. The auxiliary bolt 18 cooperates with an associated strike (not shown) to fully tighten the blank bolt 16 into the latch position within the seat in a manner well known in the art. Tightening bolts A coupling member or tailpiece attached to the airtightening bolts in the housing.
A T-shaped terminator (not shown) protruding from the rear of the blank bolt housing and adapted to be releasably coupled to the actuation unit 14 in a conventional manner.
tal end). As shown in FIGS. 3 and 4, the actuation unit 14 comprises a generally cylindrical housing assembly, generally indicated at 20, wherein the actuation unit 14 includes a male threaded tubular sleeve 22 and coaxially outwardly projecting threads on both sides. And a somewhat similar locking sleeve 24. An inner rollback assembly, generally designated 26, is supported by a tubular sleeve 22 for limited rotational movement relative to the housing assembly 20, beyond and coaxially outwardly projecting from the sleeve, and The inner operating lever 28 is received. The lever 28 is releasably coupled in place to the free end of the inner rollback assembly to impart rotation to the rollback.

An outer rollback assembly, generally designated 30, having an outer rollback 32 and an auxiliary rollback 34 (FIG. 3) is supported within the locking sleeve 24 for limited rotational movement, and Lock sleeve 2
4 and beyond, projecting axially outward. The outer operation lever 36 is releasably fixed to the free end of the outer rollback 32 at a fixed position in order to impart rotational movement to the rollback. 3, the actuation unit is described in detail, the housing assembly 20 comprises an outwardly open cylindrical cup-shaped housing 38 having a side wall 40 defining a circular opening 42. Another opening 44 is formed in the front end of the housing 38 and opens through the sidewall 40, as shown, for purposes to be apparent below. The housing assembly further comprises a case assembly, generally 49, formed by a generally U-shaped inwardly open locking chassis, and also an outer wall 48 and an upper wall 50 and 52, respectively. A bottom wall, each having a pair of locking tabs. As shown in FIG. 3, the locking sleeve 24 forms a part of the case assembly and includes an outer wall 48.
Mounted in place and project outwards from it.
The case further has a chassis cap 54 that forms the inner wall of the case and supports the tubular sleeve 22 which is also part of the case. The notch formed in the chassis cap 54 receives the locking tab of the elastic locking chassis 49 in snap engagement, thereby allowing the chassis cap 54
Are assembled to the lock chassis 49.

A generally U-shaped retractor housing, generally indicated at 56, which is open to the front, is supported within the case and extends between opposing upper slide channel 60 and lower slide channel 62 to connect them. Wall 58
Have. The retractor, indicated generally at 64, received within the retractor housing 56 has an upper slide 66 and a lower slide 68. The rear ends of the slides are integrally connected by a side wall 70 that forms a cam surface 72, 72 facing forward. A pair of vertically spaced, opposed lips 74, integrally connected to the front wall of the slide, shown in FIG. 3, have empty fastening bolt tails (not shown).
Is received and releasably attached to the T-shaped terminal end of the. The upper and lower surfaces of each slide 66 and 68 engage and slide opposite inner ends of the upper slide channel 60 and the lower slide channel 62. The retractor side wall 70 is disposed outside the retractor housing, and is positioned between the side wall of the retractor housing 56 and the case walls 48 and 54, respectively. A retractor spring 75 acts between the retractor and the rear wall 58 to push the retractor 64 forward and towards its projected position.

A tubular inner rollback assembly 26 is rotatably supported within the inner sleeve 22 and defines a generally rearward facing cam surface 78 which engages the retractor cam surface 72. It has a pair of ears 76 extending outward in the direction. Ears 76 are also disposed between the sides of the retractor housing 56 and the inner surface of the wall 54,
Keep the inner rollback assembly in the correct axial orientation relative to the case. The inner control lever 28 can be manipulated to impart rotational motion to the inner rollback assembly 26 at any time to move the retractor to the retracted position. Outer rollback 32 and auxiliary rollback 34
The outer rollback assembly also includes a pair of ears 78, 80 extending radially outward, one ear 7
8 is supported by the outer rollback 32 and the other ear 8
0 is supported by an auxiliary rollback 34, and the rollback 34 is supported in the outer rollback 32 for rotational movement limited to the outer rollback. The ears 78 and 80 each cam into a forward facing cam surface 72 of the outer sidewall 70 of the retractor 64,
It defines rearward facing cam surfaces 82 and 84. Outer rollback ears 78 and auxiliary rollback ears 80
Is sandwiched between the outer surface of the retractor housing 56 and the outer wall 48 of the case to orient the outer rollback 32 in the correct axial relationship with the case and the auxiliary rollback 34 in the correct orientation with respect to the outer rollback. keep.

In general, the rearward facing cam surfaces of rollbacks 26, 32, and 34 cooperate with forward facing cam surface 72 of the retractor sidewalls to exert retractor 64 forward of retractor spring 75. Holds in retractor slide against push force. The outer rollback 32 and the auxiliary rollback 34 are rotatably supported independently of each other with respect to the case and with respect to each other. As described above, the outer operation lever 36 is fixedly attached to the free end of the outer rollback 32. Outer operation lever 36
The downward pressure applied to (FIG. 2) causes the outer rollback 32 to rotate clockwise as viewed from its inner end side,
The retractor 64 is moved rearward toward its retracted position. The outer end of the auxiliary rollback 34 is operably connected to the tail of a cylinder lock 81 coaxially received in the outer operating lever 36, as shown in FIG. The operation of the cylinder lock by an associated key (not shown) is independent of the operation of the outer operation lever 36, and the retractor 64 is operated.
Is moved to its retracted position, the auxiliary lockback 34 is rotated counterclockwise as viewed from the inner end side thereof. The present invention cooperates with the locking mechanism for the outer rollback 32 to releasably secure the outer operating lever 36 from rotational movement so that the outer operating lever 36 rotates when the locking mechanism is unlocked. It is about how to actively limit movement.

The lock mechanism of the outer operating lever will be described with reference to FIGS. 4 to 8. A pair of slot holes 86, 86 are formed facing each other in the diametrical direction, extending in the axial direction, and opening inward in the radial direction. , The outer wall 48 of the case and the tubular locking sleeve 24. Outside rollback 3
An axially arranged, inwardly opening slot 88 formed in 2 opens through the wall. The inner end of the slot 88 is disposed outward beyond the outer surface of the outer wall 48 of the case. Slot 88 is aligned with one of slots 86 when retractor 64 is in its extended position. The locking mechanism of the outer operating lever further comprises a locking rotator 90 supported at the inner end of a tubular locking rotator insert 92.
The insert is received coaxially within the inner end of the auxiliary rollback 34 and maintains the locking rotator 90 in substantially coaxial alignment with the auxiliary rollback 34 and the outer rollback 32. Locking turn 90 is received in slot 86 aligned with slot 88 and has a radially outwardly extending tail 94. A spring 96 housed within the auxiliary rollback 34 inserts the insert 92 and locking lock 90,
It acts between the outer end of the rollback and the locking turn insert 92 so as to push axially inward towards the retractor housing 56. When the locking wrench 90 is in the unlocked position, that is, in the solid line position in FIG. 7,
The tail portion 94 is arranged within a portion of the slot 86 defined by the case outer wall 48.

A pair of outer rollbacks 32 are formed in the cylindrical wall and project inwardly beyond the inner end of the tubular locking sleeve and project angularly into the cylindrical opening in the outer wall 48 of the case. Toothed protrusions 98, 98.
The toothed protrusions 98 define angularly spaced contact surfaces 100 at the inner end of the outer rollback 32. As best shown in FIG. 8, the abutment surfaces are preferably equiangularly spaced in opposite directions from the center of the lock slot 88. . The mechanism for moving the locking wrench from the unlocked position, ie, the solid line position in FIG. 7, to the locking position, ie, the broken line position in FIG. 7, is a bar link assembly, generally designated 102, having a locking bar 104. Have. The locking rod has an elastic split cylindrical retaining member at one end for receiving and retaining the pressed metal rotary button 108 in a snap-engaged condition. The rotation button is shown in FIGS. The locking rod has a generally rectangular cross section, with the outer ends of the rods terminating at the outer ends of a somewhat smaller cross section to form a pair of outward facing shoulders 110,110. A pair of axially spaced notches 112 are formed in the locking rod in spaced relation inwardly to the outer ends of the rod. The locking rod assembly further abuts the lever holding member 115 housed in the rollback and is received in the inner rollback 26 by the sleeve 114,
And a spring 117 which acts between the sleeve 114 and the retaining member 106 to push the rotary button away from the retractor. The locking mechanism also includes a link bar clasp 116 housed within the retractor housing 56 and disposed between the retractor housing rear wall 58 and the retractor 64. The link rod clasp 116 extends a distance into the retractor through the rear opening of the retractor defined by the side walls 70, the top slide channel 60 and the bottom slide channel 62. The vertically oriented tabs of the link bar clasp 116 engage the top slide 66 and the bottom slide 68, respectively, after the retractor to limit forward movement of the link bar clasp 116 with respect to the retractor 64. Spring 118
Acts between the rear wall 58 of the retractor housing and the link rod clasp 116 to push the clasp toward the retractor. Accordingly, the link rod clasp 116 also provides space between the retractor and the rear wall 58 of the housing so that it can be moved backwards with and with respect to the retractor against the pushing force of the spring 118. Placed inside.

The locking rod 104 penetrates the retractor 64 in front of the retractor side wall. The narrow outer end of the locking rod extends through the locking stud and is received within the central bore of the locking stud insert 92. Shoulder 110
Engages the inner surface of the locking turn 90. When the rotation button 108 in the inner operating lever 28 is pushed in, the locking rod 104 causes the locking rotator 90 and the locking rotator insert 92 to move axially against the inward pushing force of the spring 96. Direction outwardly to move the tail 94 to the lock sleeve 2
4 into that part of the slot 84 and further into the slot 88 of the outer rollback, locking the outer rollback to the locking sleeve 24, thereby locking the outer operating lever 36. It is positively held so as not to rotate with respect to 24. Locking screw 90
7 in the locking position, that is, the broken line position in FIG. 7, pushes the link bar clasp 116 to engage the notches 112, 112 with the locking bar 104 and the locking wrench 90.
Are held in their locked positions. If the rotary button 108 is simply pushed in, the cylinder lock 81 is operated by operating the inner operating lever 28 or by a key to move the retractor 64 toward the retracted position in the retractor housing 56. As a result, the locking knob 90 can be released from its locked state at any time. As the retractor moves rearward, the retractor moves the link rod clasp 116 with it, thereby releasing the clasp from the notches 112, 112 and the locking rod 104 by the pushing force of the spring 117. The rotator 90 is moved axially in a direction away from the rotator 90, and further, the rotator 90 is moved to the release position in the outer wall 48 in response to the pushing force of the spring 96, and the tail portion 94 is constituted by the outer wall 48. It is located within the slot 86.

The tail 94 is located between the abutments 100 and 100 defined by the toothed projections 98, 98 of the outer rollback 32 when the locking rotator 90 is in its unlocked position. . The latter abutment cooperates with the tail 94 to positively limit the rotational movement of the outer rollback 32 relative thereto within the locking sleeve 24. Contact part 11
Zero is spaced relative to the case assembly so that the rotational movement of the outer operating lever 36 in either direction of rotation is sufficient to retract the blank bolt. However, one of the abutments 110 engages the tail 94 of the locking stud to prevent further rotational movement of the outer operating lever 36 before excessive rearward movement of the retractor 64 occurs. This configuration prevents the retractor and associated link bar clasps 116 from catching on the back wall of the retractor housing and also engaging the rollback and retractor with each other, such as from excessive rotational movement of the outer rollback. Prevents damage to the cam surface. The case assembly is assembled in a cup-shaped housing with the locking tabs of the locking chassis extending through the associated slots in the housing. Two of the locking tabs are preferably bent into the position shown in FIG.
Hold the case assembled with the case assembly. The opening 44 in the housing allows the tail of the locking unit 12 to enter when the locking device 10 is assembled to the associated door.

[0014]

According to the improved lock device of the present invention, permanent damage to the lock device due to transmission of excessive operating force to the retractor mechanism can be prevented.

[Brief description of drawings]

FIG. 1 is a plan view of a lock device attached to a door according to an embodiment of the present invention.

2 is an enlarged perspective view of the lock device of FIG. 1. FIG.

FIG. 3 is an enlarged perspective view of an operation unit.

FIG. 4 is an enlarged perspective view of a lock device 1 moving unit.

FIG. 5 is an enlarged perspective view of an outer rollback.

FIG. 6 is a front view of the inner end of the lock chassis assembly.

7 is a cross-sectional view taken along line 7-7 of FIG.

FIG. 8 is a diagram showing an inner end portion of an outer rollback.

FIG. 9 is a fragmentary plan view of the outer rollback.

[Explanation of symbols]

 10 Lock Device 20 Housing Assembly 24 Lock Sleeve 26 Inner Rollback Assembly 28 Inner Control Lever 28 32 Outer Rollback 34 Auxiliary Rollback 36 Outer Control Lever 38 Housing 56 Retractor Housing 64 Retractor 86 Groove Hole 88 Groove Hole 90 Locking Turn Gold 92 Insert 94 Tail 96 Spring 98 Projection

Claims (3)

[Claims] 1. A housing assembly for housing a retractor assembly, comprising a locking sleeve means having an inner bore and an axially extending slot; an operating body rotatable from a neutral position; A first cylindrical rollback fixed to the operating body and having the other end open; the rollback projecting from the open end in the axial direction and having a pair of circumferentially spaced teeth; -Shaped protrusion, and a slot extending axially from the opening end in the middle of the tooth-shaped protrusion, when the operating body is in the neutral position, the slot of the rollback is the Positioned adjacent to the slot in the sleeve means, the slot in the sleeve means extending beyond the open end of the rollback and closed at one end and positioned in the first rollback Auxiliary rollback and auxiliary low Positioned in the bag, the first position and the second position
Further includes a locking locking assembly for a cylinder that can move in the axial direction between the locking locking assembly and the locking locking assembly to prevent rotation of the operating body. When in the first position, has a radially projecting tail positioned inside the slot of the first rollback and the auxiliary rollback; and the second position is the second position. The tail rolls the first rollback such that rotation of the rollback of a predetermined angle engages the toothed protrusions with the tails, thereby limiting rotation of the first rollback. For selectively positioning the locking wrench assembly in the first and second positions such that it is positioned within the slot of the sleeve means prior to the slot of Cylindrical lock assembly having means . 2. The cylindrical lock assembly of claim 1, wherein the means for selectively positioning the locking wrench assembly comprises a locking rod. 3. Compressing into the auxiliary rollback between the closed end for holding the locking wrench assembly against the locking rod and the locking wrench assembly. 3. The cylindrical lock assembly of claim 2 further comprising spring means positioned in position.