JP4289648B2 - Door guard - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door guard that can check a visitor and the like, and more particularly, to a door guard that considers "quietness at midnight".
[0002]
[Prior art]
As an example of the door guard, there is JP-A-6-195429. When the subject of the invention described in this publication is read, when a person in the room goes to bed with the precautionary device locked, a person such as a master who has returned from the outside of the house may be deadbolt with a key. Even if the lock with lock is unlocked, he points out the problem that he cannot enter the room unless he / she wakes up a sleeping person (for example, a wife) because the precautionary device as an auxiliary lock is operable. is doing.
[0003]
Therefore, in view of the problems of this embodiment, the applicant can operate the door frame side locking rod when, for example, a cylinder lock is driven from the outer wall surface side of the door in the closed state. The engagement arm on the door inner wall surface side is in the door frame side (meaning that the wide insertion / extraction space portion of the engagement arm is fitted to the locking frame on the door frame side) A door guard that automatically moves away from the locking rod is pending. In this new door guard, for example, when the cylinder lock is operated by a key lock operation, the seesaw piece constituting the disengagement mechanism swings in the disengagement direction against the spring force of the push spring via the rotating body of the lock. To do. Then, the disengaged engagement arm is vigorously returned by the spring force of the urging spring incorporated in the outer expansion base end portion, and hits the case wall surface of the door guard unit and generates a “gut” sound. . From my daily experience, the late night “Gattan” sounds quite indoors, so it is annoying for those who are sleeping, such as “Doki”.
[0004]
[Problems to be solved by the invention]
In view of the problem of the door guard of the new configuration proposed by the applicant, the present invention considers the quietness at midnight, and operates the door guard lock from the outer wall surface side of the door in the closed state. An object is to minimize the sound of “gutting” that is generated when the engaging arm is vigorously returned to the inner wall surface side of the door by the spring force of the biasing spring. The second object is to provide a door guard that can enter the room without waking up the sleeping person.
[0005]
[Means for Solving the Problems]
The door guard of the present invention is pivotally supported at one end of a unit base Y fixedly attached to the inner wall surface of the door when the rotating body 11 constituting the door guard releasing lock 2 is driven from the outside, and the door frame. The engaging arm 31 positioned so that the wide insertion / extraction space 34 between the upper and lower outer expanding base end portions 32 is fitted to the receiving member 4 on the side 3 is provided with the rotating body 11 and the outer expanding base end portion. 32 and a disengagement mechanism 9 including a seesaw piece 21 having a center portion pivotally supported and left and right end portions engaging and disengaging with the rotating body 11 and the outer base end portion 32, respectively. In addition, the engagement arm 31 is a door guard that automatically rotates from the receiving member toward the wall surface 8b of the unit base Y by the spring force of the urging spring incorporated in the outer expansion base end 32. Horizontal U-shaped length to regulate the door opening range A muffler member 61 is fixedly provided on the inner surface of the restricting portion 35 or on the wall surface 8b of the unit base Y to quiet the sound generated when the engaging arm collides with the wall surface 8b of the unit base Y. It is characterized by.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An example of the embodiment of the present invention will be described with reference to FIGS. First, FIGS. 1 to 3 show an environment for implementing the invention. Reference numeral 1 denotes an ordinary general door that opens outward, and a cylinder lock 2 is attached to an open side end of the door 1, for example. On the other hand, 3 is a door frame side, and a receiving member 4 is attached to the inner wall surface of the door frame side 3. The receiving member 4 includes a locking rod 6 having an engaging head 5.
[0007]
By the way, the basic structure of the door guard X of the present embodiment is based on the guard case 8 fixed to the inner wall surface 1a of the door 1 and, on the other hand, on the door frame side 3 in relation to the power transmission member 7 of the cylinder lock 2. In order to cancel the engaged state between the fixed receiving member 4 and the receiving arm 4 and the engagement arm 31 on the door 1 side, an engagement release mechanism 9 provided in the guard case 8 and an engagement arm It comprises an urging spring 41 that returns to the inner wall surface side of the door.
[0008]
In the present specification, the term unit base Y is used for convenience of explanation. The “unit base Y” is a member that is fixedly attached to the inner wall surface 1 a of the door 1 and that releases the engagement with the engagement arm 31 when the lock 2 including the power transmission member 7 is operated or driven. The guard case 8 provided with the combination release mechanism 9 is said. The base end portion of the engagement arm 31 is pivotally attached to the unit base Y. The silent member, which is the main part of the present invention, is provided at least on the inside of the engagement arm or on the wall surface of the unit base. Then, it demonstrates in order, enumerating "basic main members." It should be noted that portions (details) that are not specific requirements of the invention, such as fixing tools, are omitted as much as possible.
[0009]
(1) Cylinder lock: The cylinder lock 2 is employed for a door guard in this embodiment. The cylinder lock 2 has a power transmission member 7 that rotates left and right by a key K. The power transmission member 7 includes, for example, an inner cylindrical body 7a that rotates in the left and right directions by a key K inserted in the cylinder lock 2, and a drive shaft 7b that protrudes from the rear end portion of the inner cylindrical body 7a. .
[0010]
(2) Rotating body: The rotating body 11 is provided in a guard case 8 and is rotatably provided on a lid body 13 having an arbitrary shape facing the inner wall surface 1a of the door 1. As shown in FIGS. 4 and 5, the rotating body 11 has a fitting large-diameter portion 14 and a small-diameter portion 15 connected to the fitting large-diameter portion 14. The small-diameter portion 15 includes a power transmission member. 7 bar-shaped drive shaft 7b is inserted. Thus, a total of two projecting first engaging portions 17 are formed at appropriate positions on the outer peripheral wall of the fitting large-diameter portion 14, for example, at a portion placed 180 degrees. The lower surface side (upper side in FIG. 4) 17a of the first engaging portion 17 is formed in a semicircular arc shape. The lower surface side 17a has a tapered surface in the left-right rotation direction of the rotating body 11 with the apex portion as a boundary. Since the rotating body 11 has a small diameter portion 15 passing through the circular window hole 18 of the lid body 13 and the drive shaft 7b is fitted into the small diameter portion 15, the power transmission member 7 is rotated by operating the key lock 8, for example. Then, it rotates in the same direction as the required amount at a predetermined position.
[0011]
(3) Seesaw piece: The seesaw piece 21 has, at the right end, a first engaged portion 22 that engages and disengages with the first engaging portion 17 of the rotating body 11 in a sliding contact state with reference to FIG. is doing. On the other hand, a plurality of spring support holes 23 are formed at predetermined intervals on the upper surface of the left end portion of the seesaw piece 21. Further, on the lower surface of the left end portion of the seesaw piece 21 (corresponding to the other end portion of the seesaw piece 21), a chevron projection that engages with and disengages from the second engaged portion 33 formed on the outer extended base end portion 32 of the engagement arm 31. A second engaging portion 24 having a shape is formed. Reference numeral 25 denotes a pair of upper and lower short shafts protruding from the central portion, and the seesaw piece 21 swings about the short shaft 25 as a fulcrum.
[0012]
Here, the shape of the seesaw piece 21 will be described. The seesaw piece 21 is formed in a slightly inclined shape from the portion of the short shaft 25 to the other end, and the lower surface side of the protruding second engaging portion 24. Is "V-shaped". That is, the second engaging portion 24 has a mountain-shaped protrusion corresponding to the fact that the second engaged portion 33 of the engaging arm 31 is a “V-groove”.
[0013]
(4) Seesaw piece pressing spring: The pressing spring 27 is a coil spring. Although there are no particular illustrations, there are a total of three push springs 27. One end portions of these push springs 27 are respectively incorporated in the spring support holes 23, while the other end portions are appropriately supported in a spring accommodating portion 28 formed in the lid body 13. The push spring 27 contracts when the seesaw piece 21 swings in the disengagement direction via the rotating body 11 that rotates by the operation of the key K when the door is closed. That is, as shown in FIG. 5, the second engagement portion 24 of the seesaw piece 21 contracts when it is separated from the second engaged portion 33 of the engagement arm 31.
[0014]
(5) Engagement arm ... Although the engagement arm 31 is generally used, in this embodiment, the door guard X can be released even when the door 1 is deformed due to an earthquake or the like. In this way, the wide insertion / extraction space 34 (clearance a) between the upper and lower outer expansion base ends is set large.
[0015]
As shown in FIG. 6, a wide insertion / extraction space 34 that can be removed from the engagement head 5 of the locking rod 6 is formed at the outer base end 32 of the engagement arm 31. A lateral engagement hole 36 for guiding the locking rod 6 is formed in the lateral U-shaped elongated rod restricting portion 35 provided continuously to the outer extended base end portion 32.
[0016]
Further, disk-shaped bearing portions 37 and 37 are formed on the upper and lower outer extended base end portions 32 and 32, respectively, and the second engaging portion of the seesaw piece 21 described above is formed on the outer peripheral wall of these bearing portions 37 and 37. Cross-section V-shaped groove second engaged portions 33 with which 24 is engaged and disengaged are formed. As shown in FIG. 4, the second engaged portion 33 is provided at 90 degrees and a total of two second engaged portions 33 are formed. A housing recess 39 for the biasing spring 41 is formed on the outer wall surface of the bearing portion 37 around the shaft hole 38. A spring end notch 40 that receives one end of the biasing spring 41 is formed at an appropriate portion of the inner wall surface that forms the storage recess 39.
[0017]
By the way, the clearance a of the insertion / extraction space 34 between the outer expansion base end portions described above is “about 2.4 times” to “3.4 times” as compared with that of the guide engagement hole 36 in this embodiment. Is set between "degree". Therefore, there is a sufficient gap between the peripheral wall of the engaging head 5 of the receiving member 4 and the wall surface between the disk-shaped bearing portions 37 and 37.
[0018]
(6) Energizing spring: The energizing spring 41 is incorporated in the housing recess 39 of the bearing portion 37 of the outer expansion base end portion 32, and the seesaw piece 21 is disengaged against the spring force of the push spring 27. When swinging in the direction, the engagement arm 31 is always urged so as to be immediately separated from the locking rod 6 on the door frame side 3. One end of the urging spring 41 is supported in the notch 40 for the spring end of the bearing portion 37, while the other end is in pressure contact with an appropriate portion of the wall portion of the unit base Y.
[0019]
(7) Guard case ...... The guard case 8 will be described with reference to FIGS. 8a is an inner wall surface side facing the inner wall surface 1a of the door 1, and 8b is an outer wall surface side facing the rotated engagement arm 31. Reference numeral 44 denotes a fitting recess for the lid body 13, and the fitting recess 44 has a support surface 44 a of the lid body 13. A circular fitting portion 45 communicates with the fitting recess 44. Reference numeral 46 denotes a rotating body fitting portion that further communicates below the circular fitting portion 45. The rotating body fitting large-diameter portion 14 is fitted into the rotating body fitting portion 46. Therefore, in this embodiment, both the large-diameter circular fitting portion 45 and the small-diameter rotating member fitting portion 46 are rotating member fitting portions.
[0020]
47 is a T-shaped storage portion for the seesaw piece 21, and this seesaw piece storage portion 47 communicates with the rotating body fitting portions 45 and 46 and the lid fitting recess 44. At the center of the opposite side wall forming the seesaw piece storage portion 47, a small notch 48 is provided in which the short shaft 25 of the seesaw piece is fitted. Reference numeral 49 denotes a through hole into which the protruding second engaging portion 24 of the seesaw piece enters. Reference numeral 50 denotes a semicircular support portion 50 facing the outer wall surface (bias spring side) of the bearing portion 37 of the engagement arm 31, and a central hole 52 for the support shaft 51 is formed in the support portion 50.
[0021]
(8) Silencer member: As shown in FIGS. 6 and 7, reference numeral 61 is a silencer member provided inside the engagement arm 31. In the present embodiment, a total of two are provided in a portion near the center of the horizontal U-shaped long gutter restricting portion 35. As the sound deadening member 61, rubber is employed. Thus, the muffling member 61 is embedded in the small recess 62 formed in the long wall restricting portion 35 via the adhesive layer 63.
[0022]
As described above, according to the present invention, when the lock 2 for releasing the door guard is driven from the outside, the engagement arm 31 is moved by the engagement release mechanism 9 provided on the unit base Y and the spring force of the urging spring 41. Accordingly, the receiving member 4 is automatically separated from the locking rod 6 and returned to the inner wall surface 1a side of the door 1, and at this time, between the wall surface 8b of the unit base Y and the inside (particularly the end portion) of the engagement arm 32. It is sufficient if the generated sound can be made quiet. Therefore, the muffling member 61 may be formed in, for example, a plate shape or a block shape and fixed to the wall surface 8b of the unit base Y.
[0023]
(9) Catch member: As shown in FIGS. 8 and 9, a catch member 65 that receives the lateral U-shaped long gutter restricting portion 35 of the engagement arm 31 is fixedly provided on the wall surface 8 b of the unit base Y. It has been. The catch member 65 is made of a thermoplastic resin, for example, polyacetal (POM), and is formed in a form that can hold the horizontal U-shaped eaves restricting portion 35 as shown in FIGS.
[0024]
Thus, 66 is a base portion attached to the wall surface 8b of the unit base Y via a fixing means, and 67 is a pair of receiving portions protruding from the upper and lower ends of the base portion. These receiving portions 67 and 67 receive the silencer members 61 and 61 of the engagement arm 31 when the engagement arm 31 automatically returns by the spring force of the biasing spring 41. Since polyacetal (POM), which is an example of a thermoplastic resin, is excellent in low noise and wear resistance, it is desired to be combined with rubber, which is an example of the silencer member 61 on the engagement arm 31 side. It is possible to achieve “low sound” or “silence”.
[0025]
By the way, the catch member 65 of the present embodiment has a holding portion 68 that engages with the lateral U-shaped eaves restricting portion 35 between the receiving portions 67 and 67. The holding portion 68 is formed in an M-shaped cross section as shown in FIG. Thus, in the embodiment in which the catch member 65 has the holding portion 68, there is an effect that the engagement arm 31 returned to the inner wall surface 1a of the door 1 can be reliably held at a predetermined position. Since the operation of the engagement arm 31 has already been described together with the configuration, details thereof are omitted.
[0026]
【Example】
The cylinder lock 2 is an auxiliary lock employed for the door guard in this embodiment. Therefore, the cylinder lock 2 of this embodiment has the power transmission member 7 that is rotated to the left and right by the combined key K, but the cylinder lock 2 itself is a magnet lock provided with, for example, a dial lock referred to as character alignment and a magnet tumbler. When the design is changed, the operating state of the power transmission member 7 is naturally different. For example, when the power transmission member 7 repelled by the polarity of the magnetic material of the magnet key is provided in the cylinder lock 2 or when the first rotary body of the dial lock is rotated to the left or right based on the password, the power transmission member 7 is When it can be driven, the inner cylinder 7a and the drive shaft 7b that are rotated in either the left or right direction by the key K are not required. In particular, in the case of the latter dial lock, the joint key K itself is also unnecessary.
[0027]
Accordingly, the auxiliary lock (including cylinder lock) 2 for the engagement arm 31 provided with the biasing spring 41 resists the spring force of the push spring 27 against the seesaw piece 21 incorporated in the unit base Y when the door is closed. It is enough to have a function that can be moved. Note that the muffling member 61 may be fixedly provided on both the inner side of the lateral U-shaped elongate restricting portion 35 of the engaging arm 31 and the wall surface 8b of the unit base Y.
[0028]
【The invention's effect】
As is clear from the above description, the present invention has the following actions and effects.
(1) When the door guard lock is operated from the outer wall surface side of the door in the closed state, the “gut” sound generated when the engagement arm returns vigorously by the spring force of the biasing spring is minimized. be able to.
(2) When the lock is driven from the outer wall surface of the door, the engagement arm in the lockable state on the indoor side is automatically separated from the lock rod, so that a person who goes to bed at night (for example, a wife) You can enter the room without waking up.
(3) In the embodiment in which the catch member 65 has the holding portion 68, the engagement arm 31 that has returned to the inner wall surface 1 a of the door 1 can be reliably held at a predetermined position.
[Brief description of the drawings]
1 to 11 are explanatory views showing an embodiment of the present invention.
FIG. 1 is an explanatory view showing an embodiment of the invention (in a state where a door guard is working).
FIG. 2 is a schematic explanatory view seen from the plane side.
FIG. 3 is a partial schematic cross-sectional explanatory view showing the internal structure as seen from the plane side.
FIG. 4 is a schematic cross-sectional explanatory diagram when the engagement arm is set to be engageable with a receiving member on the door frame side.
FIG. 5 is a schematic cross-sectional explanatory view when the engagement arm automatically returns to the inner wall surface side of the door by the spring force of the biasing spring.
FIG. 6 is an explanatory view of the engagement arm as viewed from the inside.
FIG. 7 is an explanatory view showing an example in which a silencer member is provided on an engagement arm.
FIG. 8 is an explanatory view from the front where a catch member is provided on the wall surface of the unit base.
9 is a schematic cross-sectional view taken along line 9-9 of FIG.
FIG. 10 is a schematic cross-sectional explanatory view of a catch member.
FIG. 11 is an explanatory view showing a relationship between a catch member and an engagement arm.
[Explanation of symbols]
X ... door guard, Y ... unit base, K ... key, 1 ... door, 1a ... inner wall surface, 2 ... lock, 3 ... door frame side, 4 ... receiving member, 5 ... engaging head, 6 ... locking rod, DESCRIPTION OF SYMBOLS 7 ... Power transmission member, 7a ... Inner cylinder, 7b ... Drive shaft, 8 ... Guard case, 9 ... Engagement release mechanism, 11 ... Rotating body, 13 ... Cover, 14 ... Large diameter part of fitting, 15 ... Small diameter , 17 ... first engaging part, 17 a ... lower surface side, 21 ... seesaw piece, 22 ... first engaged part, 23 ... spring support hole, 24 ... second engaging part, 25 ... short axis, 27 ... Push spring, 28 ... Spring housing part, 31 ... Engaging arm, 32 ... Outer base end, 33 ... Second engaged part, 35 ... Horizontal U-shaped eaves restricting part, 38 ... Shaft hole, 40 ... Notch part, 41 ... Biasing spring, 46 ... Rotating body fitting part, 51 ... Support shaft, 61 ... Silent member, 62 ... Small recess, 63 ... Adhesive layer, 65 ... Catch member, 66 ... Base part, 67 ... Only part, 68 ... holding portion.

Claims (5)

When the rotating body 11 constituting the door guard releasing lock 2 is driven from the outside, it is pivotally supported by one end portion of the unit base Y fixedly attached to the inner wall surface of the door and the receiving member 4 on the door frame side 3. Further, an engagement arm 31 positioned so that the wide insertion / extraction space 34 between the upper and lower outer expansion base ends 32 is fitted between the rotating body 11 and the outer expansion base end 32. Through the disengagement mechanism 9 including the seesaw piece 21 that is pivotally supported at the central portion and whose left and right end portions are engaged with and disengaged from the rotating body 11 and the outer base end portion 32, respectively. A door guard that automatically rotates from the receiving member toward the wall surface 8b of the unit base Y by the spring force of the urging spring incorporated in the outer expansion base end portion 32, and opens the door opening range of the engagement arm 31. The inside of the horizontal U-shaped long gutter regulating part 35 for regulating or The wall surface 8b of the serial unit base Y, Door Guard, characterized in that the engagement arm is provided with a silencing member 61 to quiet sounds sound generated when colliding with the wall surface 8b of the unit base Y fixedly. 2. The door guard according to claim 1, wherein a catch member 65 for receiving the lateral U-shaped long wall regulating portion 35 of the engagement arm 31 is fixedly provided on the wall surface 8b of the unit base Y. 3. The door guard according to claim 2, wherein the catch member 65 is formed of a thermoplastic resin. When the rotating body 11 constituting the door guard releasing lock 2 is driven from the outside, it is pivotally supported at one end of the unit base Y fixedly attached to the inner wall surface of the door, and the receiving member on the door frame side 3 4, an engagement arm 31 is provided between the rotating body 11 and the outer expanding base end portion 32 so that the wide insertion / extraction space portion 34 between the upper and lower outer expanding base end portions 32 is fitted into the engaging arm 31. Through the disengagement mechanism 9 including the seesaw piece 21 that is pivotally supported at the central portion and whose left and right end portions are engaged with and disengaged from the rotating body 11 and the outer base end portion 32, respectively. A door guard that automatically rotates from the receiving member toward the wall surface 8b of the unit base Y by the spring force of the urging spring incorporated in the outer expansion base end portion 32, and opens the door opening range of the engagement arm 31. On the inside of the horizontal U-shaped eaves restricting portion 35 for restricting It provided the sound member 61 in a fitting state, whereas, on the wall surface 8b of the unit base Y, characterized in that the catch member 65 formed of a thermoplastic resin for receiving said sound deadening member 6 is fixed Door Guard. The door guard according to claim 4, wherein the catch member 65 includes a holding portion 68 that engages with the lateral U-shaped long wall regulating portion 35.

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