JP4273774B2 - Latch fixture - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a latch fixing tool for fixing a lock latch that can be moved in and out from a side surface of a door to a state in which it is immersed in the side surface of the door.
[0002]
[Prior art]
[Patent Document 1]
Japanese Utility Model Publication No. 55-62758 [Patent Document 2]
Japanese Utility Model Publication No. 59-28168 Conventionally, the lock of the door is generally installed on site. However, in the case where a processing defect is found in the lock mounting portion of the door body after attaching the lock on site, the processing cost is increased without time. In addition, when it is necessary to complete the lock mounting in a short period of time, the burden on the operator at the site has been increased.
[0003]
Therefore, it was proposed that the lock body (excluding the handle, cylinder, thumbturn, etc.) be installed at the factory. However, when the lock body is factory-installed, a latch is attached to the door body, and the latch protrudes from the side of the door at all times, while the door body does not have a handle that works with the latch. When the door is closed once after it is suspended from the frame, a latch is applied and the door cannot be opened. Therefore, when attaching the lock body to the factory, it is necessary to regulate the protrusion of the latch.
[0004]
In addition, in existing doors such as hospital rooms, WCs, and library rooms, a latching sound when the door is opened or closed may be annoying, or the latch may get in the way. In such a case, sticking a gum tape or the like to the side of the door restricts the protrusion of the latch, but this has a problem in terms of aesthetics and durability. Therefore, there is a demand to restrict the protrusion of the latch with an existing door that is easy to attach and detach and is excellent in aesthetics.
[0005]
Here, in Patent Document 1, the protrusion 1 of the latch bolt 5 is rotatably mounted on the side of the door, and the latch 1 is closed by rotating the prevention bracket 1 and tilting it outward. In this case, the latch hole 3 is closed by the rotatable preventive fitting 1, and the portion of the preventive fitting 1 that is inclined outwardly protrudes from the door surface and looks bad. Further, the preventive fitting 1 is vertically long (prevention). When the bracket also has a dead bolt hole), the protrusion of the prevention bracket when tilting becomes conspicuous, and the dead bolt hole is also closed at the same time. There is an inconvenience that the operation of protruding the deadbolt cannot be performed even when it is desired to regulate the dead bolt. In addition, for the existing lock, it is necessary to separately prepare a rotatable prevention bracket, and in order to prevent the latch from protruding in the existing door, the lock of the door cannot be used as it is. Processing work to install the prevention metal fitting is required.
[0006]
On the other hand, in Patent Document 2, the retractor 5 is slid through the hub 7 interlocked with the rotation operation of the cylinder or the thumb turn, and the latch bolt 1 to which the elastic force is always applied in the protruding direction is immersed. It is characterized by the internal mechanism of the lock body. Since this has a feature in the mechanism itself of the lock body, it is necessary to create a new lock separately from the existing lock, and the manufacturing cost increases in combination with a complicated internal mechanism. Further, in order to prevent the latch from protruding in the existing door, it is necessary to replace the lock itself.
[0007]
[Problems to be solved by the invention]
An object of this invention is to control that a latch protrudes from a door side surface, without adding a change to the structure of a lock main body.
[0008]
[Means for Solving the Problems]
The technical means adopted by the present invention in order to achieve such a problem is that the latch is detachably mounted in the space formed between the latch and the front plate when the latch is inserted into the side surface of the door while restricting the protrusion of the latch. Is a latch fixture.
[0009]
The latch fixture has a locking projection, and is mounted by locking the locking projection to the back surface side of the edge of the latch hole formed in the front plate on the side surface of the door. In a specific aspect, the locking projections are formed on the upper and lower parts of the latch fixture, respectively, and the locking projections are locked to the back side of the upper and lower edges of the lug hole.
[0010]
The latch fixture has elasticity and is detachably attached to the space by the elasticity. In the case where the locking projections are provided at the upper and lower parts, the vertical dimension (height dimension) of the latch fixture is made variable by elasticity to facilitate attachment and detachment to the space. In the embodiment, the upper piece and the lower piece are constituted by elastic pieces, or the whole body is constituted by a shape that can be easily bent.
[0011]
The latch fixture has a size and shape that fits completely within the space. The latch fixture is completely accommodated without protruding from the side surface of the door, so that the aesthetic appearance of the door is not impaired even when the latch fixture is attached to an existing door. In one preferred form, the latch fixture has a generally triangular prism shape as a whole corresponding to the size and shape of the space.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a top view, a front view, and a side view of a lock body. The lock body has a flat casing 1 that can be accommodated within the thickness of a door. A dead bolt 3, a latch, and a dead bolt operating mechanism are incorporated. The casing 1 has a side surface portion 4, a front surface portion 5, a rear surface portion 6, an upper surface portion 7, and a bottom surface portion 8, and is formed in a box shape with the front surface portion 5 opened.
[0013]
The upper and lower portions of the front portion 5 extend beyond the upper surface portion 7 and the bottom surface portion 8, and a front plate 9 having substantially the same shape and dimensions as the front surface portion 5 is attached to the front surface portion 5. The front plate 9 is formed with two in / out holes 10 and 11 for making the dead bolt 3 and the latch 2 in / out, with an interval in the vertical direction. In the illustrated example, the dead bolt 3 is in an immersed state, and the latch 2 is in a protruding state. The front plate 9 forms a part of the side surface of the door when the lock body is assembled into the door. In the illustrated example, the front plate 9 is overlapped and mounted on the front portion 5 of the lock main body. However, the front portion of the lock main body and the front plate may be formed from a single member.
[0014]
Two holes 12 and 13 are formed in the side surface portion 4 of the casing 1 with a space in the vertical direction. A cylinder that can be rotated by a thumb turn or a key (not shown) is attached to the upper hole 12, and the dead bolt 3 comes and goes out of the hole 10 of the front plate 9 of the lock body by the thumb turn or key turning operation. Yes. A grip ball or a shaft portion of a lever handle (not shown) is attached to the lower hole 13. By the turning operation of the handle, the latch 2 can be moved in and out of the hole 11 of the front plate 9 of the lock body through the rotation of the shaft portion.
[0015]
The door is formed with a lock mounting portion for receiving the lock main body. The lock main body is incorporated into the lock mounting portion of the door and is screwed through screw holes formed in the upper and lower ends of the front portion 5 and the front plate 9. The lock main body is fixed to the side surface of the door by 14. In the state where the lock body is mounted on the door, the front plate 9 of the lock body forms a part of the side surface of the door. Then, attach the handle and thumb turn to the door and lock body. A strike plate (not shown) is provided in the frame of the opening of the building so as to face the front plate 9 when the door is closed, and when the dead bolt 3 and the latch 2 protrude, the strike plate Two receiving holes are formed. With the door closed, the door is locked by projecting the dead bolt 3 from the hole 10 of the front plate 9 and engaging with the hole of the strike plate by a thumb turn or key turning operation.
[0016]
The latch 2 has a rectangular shape in front view from the left and right side surfaces 20, 21 and the upper and lower surfaces 22, 23, and the front end side is inclined from one side surface 20 to the other side surface 21 toward the base end side. The inclined surface 24 is formed by notching. Specifically, the leading end side of the latch 2 (the head of the latch protruding from the side surface of the door) has a vertical surface (one side surface 20) extending in the protruding and retracting direction of the latch 2 and a leading end formed at the leading end of the vertical surface 20. It has a portion 25, an inclined surface 24 extending in an inclined manner from the distal end portion 25 toward the base end side, and upper and lower surfaces 22 and 23 having a generally right triangle shape.
[0017]
The latch 2 always protrudes from the hole 11 of the front plate 9 by a spring force. When the door is closed, the inclined surface 24 of the projecting latch 11 comes into contact with the frame of the opening while immersing from the hole 11 of the front plate 9 against the spring force. It becomes free and protrudes into the receiving hole of the strike plate. In this state, the opening of the door is restricted by the vertical surface 20 of the latch 2, and in order to open the door, it is necessary to immerse the latch 2 into the side surface of the door by a turning operation of the handle. When the hand is released from the handle, the free handle and the latch 2 are returned to their original positions by the spring force. As shown in FIG. 3, the side surfaces 20 and 21 of the latch 2 appear and disappear while being guided by the wall surfaces 30 and 31, respectively.
[0018]
FIG. 2 is a view showing a latch fixture 15 according to the present invention. The latch fixture 15 is an elastic piece having a substantially triangular prism-like overall shape. Specifically, it includes an upper piece 16 having a substantially right triangle shape in plan view, a lower piece 17 having a substantially right triangle shape in plan view, and a connecting piece 18 that connects the upper piece 16 and the lower piece 17. . Locking protrusions 19 and 19 are formed on the surface portion of the upper piece 16 and the surface portion of the lower piece 17, respectively. The upper piece 16 and the lower piece 17 are respectively formed with groove portions 160 and 170 extending in the horizontal direction within the thickness, and the upper piece 16 and the lower piece 17 are elasticized via the groove portions 160 and 170. I have it. By using the upper piece 16 and the lower piece 17 as elastic pieces, the vertical dimension (height dimension) of the latch fixture 15 is variable.
[0019]
As shown in FIG. 3, the shape and dimensions of the latch fixture 15 are substantially triangular prism-shaped spaces (between the latch 2 and the front plate 9) when the latch 2 is inserted through the insertion / extraction hole 11 of the front plate 9. It is formed so as to correspond to the shape and size of the inclined surface 24 of the latch 2 and the space surrounded by the wall surface 31 and the side surface of the virtual door that passes through the lure hole 11. The overall shape and dimensions of the latch fixture 15 are substantially the same triangular shape as the triangular prism-like space. Specifically, the height dimension of the latch fixture (the dimension between the surface portion of the upper piece 16 and the surface portion of the lower piece 17) is the height dimension of the latch 2 (dimension between the upper and lower surfaces 22, 23) and It is substantially the same as the height dimension of the appearance hole 11. Further, the triangular planar shapes of the upper piece 16 and the lower piece 17 of the latch fixture 15 correspond to the substantially right triangular shape of the space. When the latch fixture 15 is inserted into the space, one side of the upper piece 16 and the lower piece 17 of the latch fixture 15 is flush with the side of the door, as shown in the partially cutaway top view of FIG. It is stored in the space, and the portion of the latch fixture 15 does not protrude from the side surface of the door.
[0020]
When the latch fixture 15 is inserted into the triangular prism-shaped space, the locking projections 19 formed on the top and bottom of the latch fixture 15 are configured to be locked to the back surface of the edge of the front and rear holes 11 of the front plate 9. (Refer to the right figure in FIG. 2). The portion where the locking projection 19 is formed is selected such that the locking projection 19 contacts the back surface of the front plate 9 when the latch fixture 15 is inserted into the space. Further, the portion of the locking projection 19 that contacts and locks the back surface of the front plate 9 is formed on a vertical surface.
[0021]
In the latch fixture configured as described above, when it is desired to keep the latch 2 immersed from the side surface of the door, the latch 2 is immersed in the side surface of the door against the spring force, and the space formed at that time Then, the latch fixture 15 is inserted. The latch fixture 15 has elasticity (in particular, the upper piece 16 and the lower piece 17). The latch fixture 15 is inserted into the space by using elasticity, and the upper and lower locking projections 19 are moved to the front plate 9. It is made to latch on the back surface side of the upper-lower-end edge of the intrusion hole 11 formed in this. By doing so, the latch fixture is mounted in the space in a state where the protrusion of the latch 2 is restricted.
[0022]
In order to release the restriction of the protrusion of the latch 2, if the latch fixture 15 is removed from the space using elasticity, the latch 2 protrudes and returns to the original position by the spring force. In the illustrated embodiment, the upper piece 16 and the lower piece 17 of the latch fixture 15 are respectively inclined surfaces so as to correspond to the shape of the latching hole 11 (the corners are inclined). 16a and 17a are formed, but when the latch fixture 15 is inserted into a rectangular intrusion hole having a right corner, the inclined surface of the upper piece 16 and the lower piece 17 and the corner of the intrusion hole A gap is formed between them, and by inserting a tapered member into the gap, the latch fixture can be released and the latch fixture can be easily removed.
[0023]
FIG. 4 is a latch fixture 150 according to another embodiment. The latch fixture 150 has a main body formed of a flat rectangular parallelepiped, and locking protrusions 190 and 190 formed on the upper surface 151 and the lower surface 152 of the main body, respectively. The height dimension of the latch fixture 150 (dimension between the upper and lower surfaces 151, 152) is substantially the same as the height dimension of the latch 2 (dimension between the upper and lower surfaces 22, 23) and the height dimension of the intrusion hole 11. Further, the width of the latch fixture 150 is such that the latch fixture 150 can be inserted into a space formed when the latch 2 is inserted into the front / rear opening hole 11 of the front plate 9, and the locking projection 190 of the upper and lower surfaces 151, 152. , 190 are dimensioned so that they can be locked to the back surface of the edge of the lug hole 11 formed in the front plate 9.
[0024]
The latch fixture 15 shown in FIG. 2 has a shape and size corresponding to the triangular prism-shaped space. From the viewpoint of restricting the protrusion of the latch 2, the latch fixing tool 15 is inserted into the latch 2. As long as the projection is restricted to the rear surface of the front plate 9 in a restricted state, the size and shape of the latch fixture need not necessarily be triangular. However, from an aesthetic point of view, it is preferable that the portion of the latch fixture 150 does not protrude from the side surface of the door (that is, the latch fixture fits in the side surface of the door), and it is desirable to have such dimensions and shapes. The latch fixture 150 is made of an elastic member such as resin, and has a flat main body shape so that it can be easily bent. The height of the latch fixture 15 is variable, and the latch fixture 150 can be inserted into the space. Good removal. In the lower diagram of FIG. 4, the surface portion of the latch fixture 150 is shown in contact with the inclined surface 24 of the latch 2 in parallel. However, if the latch 2 is mounted in a state in which the protrusion of the latch 2 is restricted, The orientation of the surface portion of the latch fixture 150 is not limited.
[0025]
Although the latch fixture is made of nylon resin in the illustrated example, the latch fixture may be made of another elastic member such as elastic rubber. A resin frame (not shown) may be provided around the appearance hole 11 of the front plate 9, in which case the edge of the frame constitutes the edge of the appearance hole, and the latch fixture 15, The locking protrusions 19 and 190 of 150 are in contact with and locked to the edge of the frame body from the back side. Moreover, although the lock main body used for a handle ball or a lever handle is shown in FIG. 1, the latch fixture according to the present invention can also be used for a latch of a so-called push-pull lock.
[0026]
【The invention's effect】
By inserting the latch fixture according to the present invention into a space formed when the latch is immersed, the protrusion of the latch can be regulated, and attachment and removal are also easy. The latch fixture according to the present invention is prepared independently of the lock main body, and does not change the existing lock configuration, and does not impair the aesthetics, and the latch protrusion can be easily operated. Can be regulated. By using the latch fixture according to the present invention, even if the lock main body is factory-installed, the door cannot be opened on site. Accordingly, the lock main body can be attached to the door main body at the factory and shipped, and the work of attaching the lock on the work site can be shortened, and no unexpected processing problems can occur at the work site. Moreover, even when it is desired to immerse the latch in an existing door, the latch protrusion according to the present invention can be used to easily restrict the protrusion of the latch without impairing the aesthetic appearance. In addition, the latch fixture according to the present invention can be applied to different lock bodies if the dimensions of the latch are common, and is versatile, and can be provided at low cost by mass production.
[Brief description of the drawings]
FIG. 1 is a top view, a front view, and a side view of a lock body.
FIG. 2 is a view showing a latch fixture, and in the right side view, the engagement between the latch projection of the latch fixture and the back surface side of the edge of the intrusion hole formed in the front plate is shown.
FIGS. 3A and 3B are a front view and a partially cutaway top view of a lock body showing a state in which a latch fixture is inserted. FIGS.
FIG. 4 is a perspective view of a latch fixture according to another embodiment and a partially cutaway top view of a lock body showing a state in which the latch fixture is inserted.
[Explanation of symbols]
2 Latch 9 Front plate 11 Retract hole 15, 150 Latch fixture 19, 190 Locking protrusion 24 Inclined surface

Claims (1)

A latch fixture that is detachably mounted in a state in which the protrusion of the latch is restricted in a space formed between the latch and the front plate when the latch is immersed in the side surface of the door ,
The latch has an inclined surface on the tip side, and the side surface of the latch is guided by the wall surface in the side surface of the door so as to appear and disappear from the intrusion hole of the front plate constituting a part of the side surface of the door,
The space is a substantially triangular prism shape surrounded by the inclined surface of the latch, a side surface of the door passing through the in / out hole, and the wall surface guiding the side surface of the latch when the latch is inserted through the in / out hole. Space
The latch fixture has a latching protrusion on each of the upper and lower portions and has elasticity, and the latch fixture has the upper and lower edges of the upper and lower holes by the elasticity. It is detachably mounted in the space by being locked to the back side of the door, and the latch fixture has a size and shape that fits completely in the space when mounted in the space.
Latch fixture .

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