JP2000204818A - Sentinel lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sentinel lock to hold a door in a half-opened condition to a door frame in which a person can pass the door frame without being caught or bumping, in which rattling sound is not generated in opening or closing the door, and in which operability is improved. SOLUTION: This sentinel lock comprises a lock body 3 to be installed on a door 2, and a bearing member 5 to be installed on a door frame 4. The lock body 3 is provided with an oscillation arm 10 freely capable of oscillating forward and backward about a horizontal shaft 9, and an engagement body 21 movable right and left is provided on a tip part 10b of the oscillation arm 10. In the bearing member 5, an engagement hole 37 in which the engagement body 21 is engaged, and an engagement groove 38 extended above it are only provided, and there is no sharp protrusion. The oscillation arm 10 is energized toward a door 2 by an energization means 12, and it will not rattle. The engagement body 21 can be easily operated by an operation member 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security tablet.

[0002]

2. Description of the Related Art A security lock is used in combination with a door lock device in, for example, an entrance door of an apartment, and when the door lock device is unlocked, the door is forced to open beyond a half-open state. To prevent intrusion of suspicious persons and the like. Conventionally, this kind of guard lock has a swing arm 10 as shown in FIGS.
The lock body 101 includes a lock body 101 provided with a lock 0 and a receiving member 102 which can be disengaged from the swing arm 100 of the lock body 101 (for example, see Japanese Utility Model Publication No. 4-35490).

The swing arm 100 of the lock body 101 is horizontally swingable about a swing fulcrum 103 provided in the vertical direction, and an end near the swing fulcrum 103 is a wide-open end 104. It is formed in a U-shape. On the other hand, the receiving member 102 is the open end 104 of the swing arm 100.
Has a ball-shaped engaging projection 106 which can be freely inserted into and removed from the U-shaped groove 105 of the swing arm 100 and is movable while being locked out. is there.

[0004] In the case of such an inside lock as shown in Fig. 25, such a guard lock attaches the lock body 101 to the door frame 110, attaches the receiving member 102 to the door 111, respectively, or moves the lock as shown in Fig. 26. In the case of an opening door, the lock body 101 is attached to the door 111, and the receiving member 102 is attached to the door frame 110. In either case, the method of use is to swing the swing arm 100 of the lock body 101 horizontally before opening the door 111, and to set the open end 104 of the lock 1
02 is fitted into the engagement protrusion 106. Then, when the door 111 is opened in this state, the engagement protrusion 106 of the receiving member 102 is
From the open end 104 to the U-shaped groove 105 within a predetermined range (the length of the U-shaped groove 105), and the door 111 is opened halfway within this range.

[0005]

In the above conventional guard lock, the receiving member 102 is located inside the door frame 110 (ie, in the passage) both when applied to the inner opening door and when applied to the outer opening door. In a state where the engagement protrusion 106 is protruded toward.
For this reason, there is a possibility that baggage, clothing, and the like of a person passing through the door frame 110 may be caught by the engagement protrusion 106, or a passer-by himself may collide with the engagement protrusion 106. In addition, the swing arm 100 always rises at a right angle to the door surface when used, and becomes a large protruding obstacle. In addition, the swing arm 100 protruding for a flat door design It is difficult to fit in design.

Further, since the swing arm 100 is for horizontally swinging, the operation cannot be performed only by the movement of the wrist movement range, and the elbow must be moved. It was a little complicated. In order to cover the difficulty of this operation even slightly, it is required that the horizontal swing of the swing arm 100 can be performed with a light force. Even if you touch it lightly, it will relatively easily swing horizontally even when it is not intended.

Therefore, when the door 111 is open (ie, when the guard is not used), there is a possibility that the swing arm 100 may be inadvertently swung.
If the door 111 is closed without being noticed as it is, the swing arm 100 is sandwiched between the door 111 and the door frame 110, which leads to damage. The present invention has been made in view of the above circumstances, and in particular, in a receiving device, the inward projection of a door frame is suppressed as much as possible so as not to obstruct a passerby. It is an object of the present invention to provide a guard lock which is easy to operate and can be prevented from being damaged due to an operation error.

[0008]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, in the guard lock according to the present invention, the lock has a lock body and a receiver, and these are divided and mounted on a door and a door frame,
The lock body includes a swing arm that can swing back and forth about a horizontal axis disposed on the upper side, and an engaging body that can move back and forth in the left-right direction is provided at the tip of the swing arm. Is provided. On the other hand, the receiving device has a vertically long engaging groove which is capable of receiving the protrusion of the engaging body at a portion facing the swinging arm which is in a hanging state when the door is closed. Has become.

Therefore, if the door is closed and the engaging body is projected into the engaging groove and the door is opened as it is, the swing arm swings upward and the engaging body moves into the engaging groove. On the other hand, it moves upward from the receiving position. And, in such a configuration that the door can be half-opened within a narrow range as long as the range in which the engagement body can move in the engagement groove or the range in which the swing arm can swing, For example, when the lock body is mounted on the door and the receiving device is mounted on the door frame, there is nothing sharply protruding inward of the door frame in the receiving device. It does not get in the way.

The lock body does not protrude regardless of whether the lock body is used or not in use. If a biasing means for biasing the swing arm toward the hanging side is provided inside the lock body, the lock body can be moved to the door. In the case where the swing arm is mounted on the door, it is possible to prevent the swing arm from rattling due to the opening and closing vibration of the door or the like. Further, when the engaging body is protruded when the door is closed, it can be surely fitted into the engaging groove. The lock body is provided with a stopper that stops the swing arm when the swing arm is in a substantially hanging state. If this stopper is made adjustable, it is possible to make the substantially hanging state of the swing arm vertical. , Can be appropriately inclined in the front-rear direction.

[0011] This makes it possible and easy to align the engaging body into the engaging groove when the door is closed, so that the door and the door frame are not properly assembled. Even at times, it can be easily handled. Providing an operating member for switching the engaging / retracting position of the engaging body with respect to the swing arm of the lock body not only facilitates the operation but also gives the viewer and the operator a sense of quality. it can. A large diameter portion is provided at the distal end of the engagement body, whereas the engagement groove has a position matching the engagement body when the door is closed and the swing arm is in a substantially hanging state. It is preferable to adopt a structure in which a large-diameter hole that allows the large-diameter portion to pass through is provided.

In other words, according to this structure, when the engaging body moves in the engaging groove even slightly from the state in which the engaging body protrudes into the engaging groove, the large-diameter portion of the engaging body moves into the engaging groove and moves horizontally. You will not escape. Therefore, for example, when the door is opened halfway, it is possible to prevent a hand, a tool, or the like from being inserted through a gap between the doors to forcibly pull out the engagement body from the engagement groove. Further, as another structure for obtaining the same operation and effect, there is also a structure in which a substantially flat type engagement head is provided at the distal end portion of the engagement body along the longitudinal direction of the engagement groove. . That is, the engaging head is received in the engaging groove as it is at a position where the engaging body projects toward the engaging groove, but the door is opened from this state, and the swing arm swings, When the engaging body moves in the engaging groove, the relative angle of the engaging head with respect to the inside of the engaging groove changes, and as a result, the engaging body (engaging head) horizontally escapes from the engaging groove. It becomes impossible.

The swing arm is not limited to be provided on the lock body, but can be provided on the receiving side. In this case, an engagement groove is provided for the swing arm. Such an embodiment is particularly advantageous for inward opening doors.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 5 show a first embodiment of a guard lock 1 according to the present invention. This guard tablet 1
As shown in FIGS. 1 and 2, a lock body 3 attached to the outward opening door 2 and a receiving member 5 attached to a door frame 4 corresponding to the lock body 3 are provided. The lock body 3 has an arm bracket 8 and a swing arm 10 suspended from the arm bracket 8 via a horizontal shaft 9. Therefore, the swing arm 10 is connected to the horizontal shaft 9.
Is pivotable in the front-rear direction (direction facing the door 2) between the substantially hanging position and the front protruding position.

As shown in FIGS. 3 and 4, the swing arm 10 used in the present embodiment has a U-shaped cross section in plan view, and has a cavity 11 formed therein. A spring 12 as an urging means is inserted through the horizontal shaft 9, and one end of the spring 12 is in contact with the inner bottom surface 13 of the arm bracket 8, and the other end is an upper end 10 a of the swing arm 10. It is locked to. Therefore, the swing arm 10
Is kept substantially suspended from the arm bracket 8, and is urged in a direction further approaching the arm bracket 8 from this state.

The inner bottom surface 13 of the arm bracket 8
Is provided with a stopper 14. This stopper 1
The boss 4 has a boss 15 integrally protruding from the inner bottom surface 13 of the arm bracket 8 toward the front, and an adjusting screw 16 screwed to the boss 15. The screw head 16a of the adjusting screw 16 is
Can be in contact with the inner surface 11a of the hollow. For this reason, when the swing arm 10 is subjected to the downward biasing action of approaching the arm bracket 8 by the spring 12, the swing arm 10 is stopped by the stopper 14. If the degree of screwing of 16 is adjusted, the hanging angle of the swing arm 10 at this time,
That is, the degree of entry and exit of the door 2 with respect to the upright surface 2a can be adjusted. That is, even if the door 2 and the door frame 4 are not properly assembled, the adjustment can be performed.

The distal end portion 10b of the swing arm 10 is provided with a position changing means 20 by utilizing the cavity 11 in that portion, and the position changing means 20 can linearly move back and forth in the left-right direction. The engaging body 21 and an operation member 22 for moving the engaging body 21 back and forth can be interlocked. That is, as shown in FIG. 4, the position changing means 20 is provided with a moving block 25 for holding the root of the engaging body 21 with respect to the guide shaft 24 provided so as to cross the cavity 11 of the swing arm 10.
Is slidably penetrated and the operation member 22 is
The operating shaft 26 is provided with a drive lever 27 that swings in the cavity 11 of the swing arm 10, and the moving block 25 and the drive lever 27 are connected to each other by a dowel pin and a dowel hole. 28 (which has a play enough to absorb the circular movement of the tip of the drive lever 27).

Accordingly, by operating the operating member 22 to twist left and right, the engaging body 21 moves back and forth in the left and right direction. The engagement body 21 is configured to protrude from the swing arm 10 not only when the engagement body 21 advances toward the holder 5 from the swing arm 10 but also when the engagement body 21 retreats. However,
This is not a limitation, and it may be housed in the swing arm 10 at the time of retreat. The engaging body 21 is in the shape of a pin with a head or in the form of a bolt, and is provided with a large-diameter portion 30 at the distal end on the protruding side. This engagement body 21
Is configured to be fixed to the moving block 25 by a set screw 31, and the swing arm 10 is provided with through holes 32 for the engaging body 21 on both left and right side surfaces.

Therefore, by loosening the set screw 31, it is possible to adjust the dimension for projecting the engaging body 21 from the swing arm 10, and to reattach the projecting direction to the swing arm 10 in the opposite direction. It has become. That is, since the re-attachment of the engaging body 21 is possible, the lock body 3 can be used for both the left-opening door and the right-opening door. Note that the relationship between the direction of operation of the operation member 22 (the direction of inclination of the operation member 22) and the state of advance of the engagement body 21, that is, the presence or absence of operation of the operation member 22 can be determined at a glance. It is convenient to attach a mark 33 at one operation position of the operation member 22 with respect to the swing arm 10 as shown in FIG.

The shape and the like of the operation member 22 are not limited at all, and may be a disk shape or a square shape with the operation shaft 26 as a center. In this lock body 3, as shown in FIG.
3 is provided with a horizontally long mounting hole 34, so that the door 2
At the time of attachment to the main body, the position adjustment in the left-right direction mainly with respect to the projecting position of the engagement body 21 and the like can be easily performed. On the other hand, as shown in FIGS. 1 and 2, the receiving tool 5 is attached to the door stop 36 of the door frame 4 and the like in a vertically elongated state, and is entirely flat. It has a shape (no sharp protrusions). A large-diameter hole 37 is formed on the surface of the lock body 3 facing the engagement body 21.
And an engagement groove 38 extending upward in communication therewith.

The large-diameter hole 37 is provided when the door 2 is closed, and when the swing arm 10 is substantially suspended from the lock body 3 and the engagement body 21 is projected.
The engaging body 21 is allowed to pass through including the large-diameter portion 30. Therefore, the opening is larger in diameter than the large diameter portion 30 of the engagement body 21. The engagement groove 38 is provided in the engagement body 21.
Although the width is narrower than the large diameter portion 30, the main body portion (the shaft portion excluding the large diameter portion 30) of the engagement body 21 has a groove width that allows passage. Therefore, when the large-diameter portion 30 of the engaging body 21 is fitted into the engaging groove 38, the engaging body 21 is moved horizontally (including a slight inclination) along the left-right direction (axial direction) as it is. Even if you do, you will not be able to escape.

The engaging groove 38 extends to a level comparable to the height of the lock body 3 at which the horizontal shaft 9 is provided, thereby allowing the engaging body 21 to move as high as possible. are doing. In the illustrated example, two large-diameter portions 30 are provided at predetermined intervals in the axial direction, and the entire distal end portion has a small drum shape. The shape is not particularly limited as long as it has a portion that projects radially outward. The large-diameter hole 37 is formed in a similar shape to the large-diameter portion 30.

Although not shown in the drawings, this receiving device 5
The door frame 4 can be screwed to the door frame 4 through a vertically long hole. Therefore, mainly in regard to the adjustment of the height of the large-diameter hole 37 and the like, the vertical position adjustment can be easily performed. Next, in the guard lock 1 having such a configuration,
As shown in FIG. 1 and FIG. 2, the use situation will be described assuming that the lock main body 3 is distributed to the door 2 and the receiving tool 5 is distributed to the door frame 4 and are respectively mounted at predetermined heights. At this time, in the closed state of the door 2, in the lock body 3, the swing arm 1 is adjusted by adjusting the adjusting screw 16 of the stopper 14.
0 is in a substantially vertical state substantially parallel to the upright surface 2 a of the door 2, and the position is adjusted so that the engagement body 21 can be inserted into or removed from the large-diameter hole 37 of the receiving tool 5 as it is.

In order to bring the door 2 into the half-open state, the operating member 22 is operated on the lock body 3 to fit the engaging body 21 into the large-diameter hole 37 of the receiving member 5 in advance. When the door 2 is opened in this state, the engaging body 21 enters the engaging groove 38 from the large-diameter hole 37 and is guided upward as it is as the door 2 opens. Then, a range in which the engagement body 21 can move in the engagement groove 38 (when the engagement body 21 reaches the upper end of the engagement groove 38) or a range in which the swing arm 10 can swing (the swing arm 10). Becomes almost horizontal)
Within a narrow range, the engagement body 21 does not rise in the engagement groove 38, and at this point the door 2 does not open.
That is, the door 2 is maintained in the half-open state.

When the door 2 is closed from this state, the engagement member 2
1 descends along the engagement groove 38 and returns to the large-diameter hole 37. At this position, the operating member 22 of the lock body 3 is operated as necessary to cause the engagement body 21 to escape from the large-diameter hole 37. . By doing so, the door 2 can be fully opened thereafter. At this time, in the lock body 3, the swing arm 10 is moved by the spring 12 in the direction of the arm bracket 8,
That is, since the swing arm 10 is urged so as to approach the door 2, the swing arm 10 does not rattle or generate collision noise due to the opening and closing vibration of the door 2.

Further, the engaging body 21 does not advance without permission unless the operation member 22 is intentionally operated. Therefore, when the door 2 is closed, the engaging body 21 is in a protruding state, leading to breakage. Such an accident does not occur. In addition, since the door 2 is opened and the receiving tool 5 does not protrude sharply inward of the door frame 4,
There is no risk that baggage, clothing, etc. of a person passing through the door frame 4 will be caught on the receiver 5, or that a passer-by himself will hit the receiver 5. In addition, there is no unusual projection, so that the appearance is refreshing.

FIGS. 6 and 7 relate to a second embodiment of the guard lock 1 according to the present invention, in which the operating position of the operating member 22 with respect to the swing arm 10 of the lock body 3 is clearly demarcated. The only difference from the above-described first embodiment is that a structure is added for this purpose. That is, in this structure, a pair of left and right spring hooks 40 projecting in an L-shape are provided for the drive lever 27 provided on the operation shaft 26 of the operation member 22. In response to the swinging of the drive lever 27, the opposite chevron portion is engaged so that one of the spring hooks 40 is strongly engaged but the other spring hook 40 is disengaged or weakly engaged. A bent spring 42 having 41 is housed therein.

Therefore, every time the operation member 22 is operated, a click feeling is obtained such that each spring hook 40 presses the opposed chevron 41 of the spring 42, and the operability is improved.
Further, since each operation position of the operation member 22 is biased by a spring, it is possible to prevent the operation position from being easily changed when the operation member 22 or the engagement body 21 is lightly touched by mistake. There are also benefits that you can do. FIG. 8 relates to a third embodiment of the guard lock 1 according to the present invention, and shows a position changing means 20 applied to the swing arm 10 of the lock body 3.
(Interlocking structure of engagement body 21 and operation member 22)
Only, it is different from the first embodiment described above.

In the position changing means 20 of the third embodiment, the operation shaft 26 of the operation member 22 is directly connected to the moving block 25 which holds the root of the engagement body 21. Of course, the swing arm 10 is provided with a horizontally long hole 45 for allowing the operation shaft 26 to move left and right. Therefore, by moving the operation member 22 left and right, the engagement body 21 is caused to perform the left and right advance operation integrally therewith. FIG. 9 shows a fourth embodiment of the guard lock 1 according to the present invention.
It is related to the embodiment, and is another row of the position changing means 20 applied to the swing arm 10 of the lock body 3.

That is, in the position changing means 20 of the fourth embodiment, a cam groove 47 in an oblique direction is provided in the moving block 25 which holds the root of the engagement body 21, and the swing arm 10 is provided in the swing arm 10. A guide groove 48 is provided which extends in the vertical direction while intersecting with the cam groove 47. Then, the operation shaft 26 of the operation member 22 is prevented from coming out in the axial direction with respect to at least one of the guide groove 48 and the cam groove 47 while being engaged with both the guide groove 48 and the cam groove 47. (Not shown) is employed.

For this reason, by moving the operating member 22 up and down straight, the operating force of the oblique component is taken out by the cam groove 47 from this operation. Is to be taken out. FIG. 10 relates to a fifth embodiment of a guard lock 1 according to the present invention,
Is different from the first embodiment described above only. That is, the receiving device 5 of the fifth embodiment is provided with the large-diameter hole 37 and the engaging groove 38 on the opposite surfaces. Therefore, it can be used as a door frame for a left-opening door and a door frame for a right-opening door. Further, in the receiving member 5, the mounting hole 50 for the door frame 4 is a long hole that is long in the horizontal direction, and the position can be adjusted in the left-right direction.

FIG. 11 relates to a sixth embodiment of a guard lock 1 according to the present invention, which is still another example of the receiving device 5. That is, the receiver 5 of the sixth embodiment is used when the shape of the door frame 4 has the surface 51 facing the lock body 3 attached to the door 2. 5a on which the large-diameter hole 37 and the engagement groove 38 are opened
And a mounting piece 53 for screwing to the door frame 4 are in the same direction (a mutually parallel relationship). This receiver 5
Can also be used for a door frame for a left-opening door and a door frame for a right-opening door.

FIG. 12 relates to a seventh embodiment of a guard lock 1 according to the present invention, which is still another example of the receiving device 5. The receiving device 5 of the seventh embodiment is very similar to the receiving device 5 of the sixth embodiment (see FIG. 11). The thickness t up to the surface 5a where the mating groove 38 is opened is kept small, but is different. Therefore, the amount of protrusion can be suppressed in the state of being mounted on the door frame 4, and the amount of protrusion can be reduced as much as possible by mounting the door frame 4 using a dug-out structure as shown in FIG. 13. There is an advantage that it can be reduced.

Needless to say, the receiving member 5 can also be used for a door frame for a left-opening door and a door frame for a right-opening door. 14 to 20 show an eighth embodiment of the guard lock 1 according to the present invention. In the eighth embodiment, each of the lock body 3 and the receiving device 5 has a different point from the first embodiment. A remarkable difference in the lock main body 3 lies in the position changing means 20 provided near the tip end 10b of the swing arm 10.

That is, in the position changing means 20, the engaging body 21 which can be extended and retracted by swinging in the left and right directions is provided with a boss portion 60 fitted on the operation shaft 26 of the operation member 22, and a diameter from the boss portion 60. It has a support rod 61 projecting in the direction, and an engagement head 62 formed in a substantially flat hammer shape at the tip of the support rod 61. Therefore,
When the operating member 22 is operated in a manner to be twisted in the left and right direction, the engaging body 21 is moved right and left about the operating shaft 26 from the top to the bottom, and the engaging head 62 is moved in the left and right directions. It has become.

Note that, as shown in FIG.
On the other hand, the through-hole 32 formed for taking in and out the engaging body 21 has a rectangular (groove-shaped) opening that is long in the vertical direction due to the swinging movement of the engaging body 21. It has been. Then, the engaging body 21 is moved to the swing arm 10.
The swing range as a state protruding from the opening 32 is regulated (stopped) by the lower opening edge of the through hole 32. The through holes 32 are provided on both left and right surfaces of the swing arm 10 so that both the right-opening door and the left-opening door can be used together. The unnecessary through-hole 32 is made of resin or the like. Is closed by a blind lid 63 (see FIGS. 15 and 16).

In the position changing means 20, the position changing means shown in FIG.
As shown in FIG. 18 and FIG.
0 is provided with a ball push mechanism 65 which presses and biases the positioning ball 64 in a recess provided on the outer peripheral surface of
The engaging body 21 (the engaging head 6) is provided in the cavity 11 of the swing arm 10.
2) can be maintained in a retracted state, and as shown in FIG.
b between the eccentric position of the boss portion 61 (the root of the support rod portion 61) in the engaging body 21 and the tension urging tool 6 such as a spring.
A two-position conversion mechanism 67, which is pulled by 6, is provided so that a swing action between the two positions in the engagement body 21 can be clicked.

By providing such a ball push mechanism 65 and a two-position conversion mechanism 67, it is possible to reliably switch the operation of the engagement body 21. Therefore, for example, the support rod 61 of the engaging body 21 does not stop with the slanting direction (the engaging head 62 protrudes halfway from the swing arm 10). It is possible to prevent the engaging body 21 from being damaged by colliding with the door frame 4, the receiving member 5, and the like. In addition to this, the lock body 3 of the eighth embodiment has the same structure as that of the lock body 3 except that the swing arm 10 is externally fitted to the arm bracket 8 to make the arm bracket 8 inconspicuous. Basically, it is the same as the lock body 3 of the first embodiment.

For example, also in the eighth embodiment, the adjusting screw 16 is screwed into the boss 15 provided on the inner bottom surface 13 of the arm bracket 8 to stop the swing arm 10 from substantially hanging and to enter and exit. An adjustable stopper 14 is provided, or a horizontally long mounting hole 34 is provided on the inner bottom surface 13 of the arm bracket 8 so that the position of the lock body 3 in the left-right direction when the lock body 3 is mounted on the door 2 can be adjusted. Alternatively, a spring 12 for holding the swing arm 10 in a substantially suspended state with respect to the horizontal shaft 9 is inserted.

The operating state of the operating member 22 and the engagement member 2
In order to determine at a glance the relationship with the retracted state of 1 (the presence or absence of an operation), the swing arm 10 is displayed at a position exposed by operating the operation member 22 with a colored point, a design, a character, or the like. It is preferable that a mark 33 (see FIG. 17) be provided. On the other hand, in the receiving device 5, as shown in FIGS. 14 and 20, the engagement groove 38 provided to face the swing lever 10 (engagement body 21) of the lock body 3.
However, the only difference from the first embodiment is that it is a simple straight groove (the large-diameter hole 37 is not provided).

Such a difference is that the large diameter portion 30 is not provided as the engagement body 21 provided on the swing arm 10 of the lock body 3 and the engagement head 62 provided instead is substantially flat. This is due to the fact that it is formed in In addition, the fact that the engaging groove 38 is a straight groove has an advantage that the receiving device 5 can be used together with both the right-opening door and the left-opening door by turning the receiving device 5 upside down (that is, the receiving device 5 (It is not necessary to provide the engaging grooves 38 on both surfaces facing each other.) Therefore, not only the cost of the receiving device 5 itself is improved and the appearance is improved, but also an advantage that a blind cover or the like is not required is brought about. I do. Further, if the engagement groove 38 is slightly longer than the required length, an advantage in that the vertical position adjustment when the receiver 5 is attached to the door frame 4 or the like can be obviated.

As described above, in the eighth embodiment having various configurations different from those of the first embodiment, the following points are notable among the differences in the operation and effect. That is, as shown in FIG. 20A, when the swing arm 10 is in a substantially hanging state, the engaging body 21 is inserted into the engaging groove 38 of the receiving member 5.
, First, at this point, the engaging head 62 is engaged with the opening edge on the lower end side of the engaging groove 38. And FIG.
As shown in (b) to (d), when the door 2 is opened in this state, as the swing arm 10 swings upward, the engagement body 21 (the engagement east portion 62) is moved. It moves inside the engagement groove 38 in the ascending direction. At this time, the angle of the engaging head 62 relatively shifts in the engaging groove 38 with the swing of the swing arm 10.

Accordingly, the engaging head 62 is
Therefore, it is impossible to cause the engaging body 21 to escape from the engaging groove 38 in the horizontal direction. This means that, when the door 2 is opened halfway, even if the swing arm 10 is forcibly inserted by inserting a hand, a tool, or the like through this gap to bend the swing arm 10 away from the receiving member 5, the engaging body 21 is engaged with the engaging groove. Since it cannot be pulled out from the lock 38, it leads to the advantage that it can be prevented, and as a result, the security effect is enhanced.

In order to smoothly change the angle of the engaging head 62 when the engaging body 21 is projected into the engaging groove 38, the supporting rod portion 61 of the engaging body 21 has a cross section. It is preferable that the shape be a circle or a polygon (the more the number of corners, the better). FIG. 21 shows a door 2 that opens left and right in opposite directions to those of the eighth embodiment shown in FIGS. 14 and 15.
1 shows an example in which the camera is mounted on a computer. The swing arm 10 of the lock body 3 shown in FIG. 21 can be rotated without operating the swing arm 10 in order to operate the adjusting screw 16 of the stopper 14. Are provided.

Therefore, it is possible to easily adjust the substantially suspended state of the swing arm 10 in and out, and to adjust the degree of adjustment (the degree of inclination of the swing arm 10) while visually confirming the adjustment. There is also the advantage of becoming. The through-hole 70 may be closed with a blind cover (not shown) made of resin or the like when unnecessary. FIG. 22 and FIG. 23 show a ninth embodiment of the guard lock 1 according to the present invention. This ninth
In the embodiment, the lock body 3 only has the engaging body 21 capable of swinging out and retreating in the left-right direction. On the other hand, the swinging arm 10 is provided on the receiving member 5 side, and The engagement groove 38 is provided in the arm 10. Of course, in the receiving tool 5, the swing arm 10 is swingable about the horizontal shaft 9 disposed on the upper side provided on the arm bracket 8 as a fulcrum.

In the ninth embodiment having such a structure, the operating member 22 is operated on the lock body 3 to
Swing upward (upside down from the eighth embodiment shown in FIGS. 14 to 20) from the bottom to the top. At this time, the swing arm 10 of the receiving member 5 is engaged with the engagement groove 38. At the upper end position (upside down position of the eighth embodiment). The ninth embodiment is mainly suitable for use in an inward opening door.
When the door 2 is opened in the state of being fitted into the lock 8, the swinging arm 10 swings upward in the receiving device 5, and the engaging body 21 of the lock body 3 turns the inside of the engaging groove 38 downward. It is designed to move.

The engaging body 21 has an engaging head 62. The angle of the engaging body 21 is relatively shifted in the engaging groove 38 with the swing of the swing arm 10, so that the horizontal escape is impossible. In this respect, substantially the same operation and effect as those of the above-described eighth embodiment can be obtained. By the way, the present invention is not limited to the above embodiments. For example, in the first embodiment and the like, when adopting an inward opening door, the lock body 3 can be attached to the door frame 4 and the receiving member 5 can be attached to the door 2. In addition, the details of the structure, member shape, material, and the like can be appropriately changed.

[0048]

As is clear from the above description, in the guard lock according to the present invention, the lock body is such that the swing arm can swing back and forth about the horizontal axis arranged on the upper side as a fulcrum. At the distal end of the arm, the engaging body can be moved left and right, and the receiving member has a large-diameter hole and an engaging groove so as to face the engaging body. . for that reason,
Even if the catch is attached to the door frame or the door, sharp protrusions directed inward of the door frame can be eliminated, and it will not be a hindrance to passers-by who pass inside the door frame. Absent.

If the urging means for urging the swinging arm downward is provided in the lock body, unnecessary rattling of the swinging arm can be prevented, so that the appearance is good and there is no noise. Further, the engagement body can be securely fitted into the large-diameter hole of the receiving member. In the lock body, if a stopper capable of adjusting the access is provided so that the swing arm can be brought into contact with the lock body, the engagement body can be surely fitted into the large-diameter hole of the receiving member. In the swing arm of the lock body, if the operation of moving the engagement body is performed by the operation member, the operation is facilitated, and damage due to an operation error or the like can be prevented.
In addition, the appearance is improved, and a high-grade feeling can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a door is half-opened using a first embodiment of a guard lock according to the present invention.

FIG. 2 is a perspective view showing a state where a door is closed from FIG.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is an enlarged view taken on line BB of FIG. 3;

FIG. 5 is a sectional view taken along line CC of FIG. 3;

FIG. 6 relates to a second embodiment of the guard lock according to the present invention and is a view showing the swing lever from the back side in order to make the position changing means easy to understand.

FIG. 7 is an enlarged sectional view taken along line DD of FIG. 6;

FIG. 8 is a rear view of a third embodiment of a guard lock according to the present invention, particularly showing a position changing means in comparison with FIG. 4;

FIG. 9 is a rear view of a fourth embodiment of the guard lock according to the present invention, particularly showing a position changing means in comparison with FIG. 4;

FIG. 10 is a perspective view showing a fifth embodiment of the guard lock according to the present invention, particularly showing a receiving device.

FIG. 11 relates to a sixth embodiment of a guard lock according to the present invention and is a perspective view particularly showing a receiver.

FIG. 12 relates to a seventh embodiment of a guard lock according to the present invention and is a perspective view particularly showing a receiver.

FIG. 13 is a plan view showing a usage example of the receiving device of the seventh embodiment.

FIG. 14 is a perspective view showing a state in which a door is opened halfway using an eighth embodiment of a medal lock according to the present invention.

FIG. 15 is a perspective view showing a state where a door is closed from FIG. 14;

FIG. 16 is a sectional view taken along line EE of FIG. 15;

FIG. 17 is a view taken along the line FF of FIG. 16;

18 is a sectional view taken along line GG of FIG.

FIG. 19 is a sectional view taken along line HH of FIG. 16;

FIG. 20 is an operation explanatory view showing a state of movement of an engagement body with respect to a receiver in the eighth embodiment.

FIG. 21 is a perspective view showing an example in which the eighth embodiment is attached to a door that opens in a direction opposite to the left and right directions shown in FIGS. 14 and 15;

FIG. 22 is a perspective view showing a state in which a door is opened halfway using a ninth embodiment of a medicinal lock according to the present invention.

FIG. 23 is a perspective view showing a state where a door is closed from FIG. 22;

FIG. 24 is a perspective view showing a lock main body used in a conventional guard lock.

FIG. 25 is a plan view showing a state where a conventional guard is used for an inward opening door.

FIG. 26 is a plan view showing a situation in which a conventional guard is used for an outward opening door.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Locker 2 Door 3 Lock main body 4 Door frame 5 Receiver 9 Horizontal axis 10 Swing arm 12 Energizing means (spring) 14 Stopper 21 Engaging body 22 Operating member 30 Large diameter part 37 Large diameter hole 38 Engagement groove 62 Joint head

Claims (10)

[Claims] 1. It has a lock body (3) and a receiving device (5),
In a lock which is divided and mounted on a door (2) and a door frame (4), a lock body (3) has a swing arm (3) which is swingable about a horizontal shaft (9) arranged on an upper side. 10), an engaging body (21) capable of moving back and forth in the left-right direction is provided at the tip (10b) of the swing arm (10), and a door (5) is provided on the receiving member (5). A vertically long engagement groove (38) is provided at a portion facing the swing arm (10) which is in a substantially suspended state when closed in (2) and which can receive the protrusion of the engagement body (21). When the door (2) is opened with the engaging body (21) protruding into the engaging groove (38), the engaging body (21) moves in the engaging groove (38). Range or swing arm (1
A guard lock characterized in that the door (2) can be half-opened within a narrow range of the range in which 0) can swing. 2. It has a lock body (3) and a receiving device (5),
In a guard that is separately mounted on a door (2) and a door frame (4), a lock body (3) has an engaging body (2
1) is provided, and the receiver (5) is provided with a swing arm (10) that is swingable about a horizontal shaft (9) arranged on the upper side, and the swing arm (10) is provided. ) Is a vertically extending engagement groove which is in a substantially hanging state and which is at the time of closing the door (2) and which can receive the protrusion of the engagement body (21) at a portion facing the lock body (3). When the door (2) is opened with the engaging body (21) protruding into the engaging groove (38), the engaging body (21) is provided with the engaging groove (38). ) Or the swing arm (1)
A guard lock characterized in that the door (2) can be half-opened within a narrow range of the range in which 0) can swing. 3. An urging means (7) for urging the swing arm (10) downward to provide the lock body (3) or the holder (5) having the swing arm (10). The guard lock according to claim 1 or 2, wherein (12) is internally provided. 4. The lock body (3) or the receiving device (5) having the swing arm (10) is stopped when the swing arm (10) is substantially suspended. 4. A guard lock according to any one of claims 1 to 3, wherein a stopper (14) is provided, the stopper (14) being capable of adjusting the degree of access. 5. The lock body (3) or the receiving device (5) provided with the engaging body (21) includes an engaging body (2).
5. The lock according to claim 1, further comprising an operating member for switching the retracted position of the item (1). 6. The engaging body (21) has an engaging groove (38) at a tip portion of the receiving member (5) which enters the engaging groove (38).
A large-diameter portion (30) that cannot horizontally escape from the arm is provided, and the swinging arm (10) is substantially suspended in the engagement groove (38) when the door (2) is closed. 6. A large-diameter hole (37) through which the large-diameter portion (30) can pass is provided at a position where the large-diameter portion (30) coincides with the engagement body (21). A guard tablet as described in Crab. 7. A substantially flat engagement head along a longitudinal direction of the engagement groove (38) at a distal end portion of the engagement body (21) which enters the engagement groove (38) of the receiving member (5). When the door (2) is opened with the engaging head (62) protruding into the engaging groove (38), the engaging body (21) is engaged. The engagement body (21) is prevented from horizontally coming out of the engagement groove (38) by the angular displacement of the engagement head (62) in accordance with the movement in the groove (38). A guard tablet according to any one of claims 1 to 5. 8. A lock body (3) is attached to a door (2),
The guard lock according to any one of claims 1 to 7, wherein the receiving tool (5) is configured to be attached to the door frame (4). 9. The lock according to claim 1, wherein the lateral movement of the engaging body is performed by linear movement. 10. The guard lock according to claim 1, wherein the reciprocating movement of the engaging body in the left-right direction is performed by swinging.