JPH0321414Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) The invention is based on a shutter that is guided by a pair of guide rails, and a pair of lock bars that are slidable in a direction orthogonal to both rails. , elastically biasing both bars in opposite directions,
Both of the guide rails are provided with lock bar receivers that prevent the tip of the lock bar from moving in the shutter opening direction and allow the shutter to move in the shutter closing direction against the elastic bias. This invention relates to an automatic locking device.

(Prior Art) In such an automatic locking device, when the lock bar engages with the lock bar receiver to release the locked state in which the shutter is prevented from rising, the lock bar is rotatable to the center in the width direction of the shutter and Means is adopted for releasing the lock by rotating an operating lever connected to the base end of the lock bar so that the lock bar can be detached from the lock bar receiving portion against the elastic biasing force of the lock bar. Such a lock release means is disclosed in Japanese Utility Model Publication No. 51-52629. In this device, long holes in the sliding direction are formed at the base ends of a pair of lock bars, and a pair of pins projecting symmetrically from the operating lever about the rotation axis of the operating lever are inserted into the long holes. It is slidably fitted into the hole. and,
When the shutter moves downward and the lock lever passes through the lock lever receiving part, the bar is pushed in the direction of sinking into the shutter against the elastic biasing force. Rotation of the operating lever is prevented by being absorbed by the material. Therefore, there is no risk that the operating lever will rotate unnecessarily when the shutter is automatically locked, and there is no risk of getting your fingers or the like jammed.

(Problem to be Solved by the Invention) However, in this conventional device, when the operating lever is rotated to release the locked state, the engagement between the elongated hole and the pin causes the base end of the lock bar to move upward or downward. Therefore, it is necessary to connect the lock bar to the operating lever via a member rotatably connected to the bar to alleviate the sliding resistance of the lock bar, making the structure complicated and difficult to assemble.

Structure of the invention (means for solving the problem) In order to solve the above problem, the invention has a shutter guided by a pair of guide rails, which slides in a direction perpendicular to both rails by operating a control lever. At the same time, both bars are elastically biased in opposite directions, and when the tip of the lock bar protrudes from the shutter, the tip is restricted from moving in the direction in which the shutter is opened. and an automatic locking device in which both guide rails are provided with lock bar receiving portions that allow movement in the closing direction, and an interval in the opening/closing direction of the shutter is provided between the base ends of the two lock bars, and the base end The distal end of the portion is bent to form an arc-shaped engaging portion, and an operating lever having a rotation fulcrum and extending along the shutter surface is attached between both engaging portions, and the operating lever is connected to the above-mentioned The lock bar is configured to come into contact with the arcuate outer circumferential surface of the engaging portion only in the direction in which the lock bar is elastically biased.

(Function) In other words, when the tip of the lock bar protrudes from the shutter, the engaging portions provided on the pair of lock bars that are elastically biased in the same protruding direction are in contact with the operating lever, and the lower part of the shutter When the tip of the lock bar passes through the lock bar receiving part as the lock bar moves, the lock bar slides in the direction of recessing into the shutter against the elastic bias, but in this sliding direction, the operating lever and the engaging part There is no engagement, and the operating lever does not rotate. When the shutter is closed and the tip of the lock bar is restricted from moving upward by the lock bar receiving part, rotating the operating lever will cause the lever to connect with the engaging part. The engagement causes the lock bar to slide into the shutter against the elastic bias, releasing the shutter from the locked state.

(Embodiment) Hereinafter, an embodiment in which the present invention is applied to a window shutter will be described based on FIGS. A shutter 4 constructed by connecting a bottom rail 3 containing a built-in key mechanism 2 constituting an automatic locking device to a slat 1 is guided so as to be slidable up and down by a pair of left and right guide rails 5 and 6. It is designed to be rolled up and housed in a storage box (not shown) disposed above.

Each slat 1 has a hook portion 1a formed at the top thereof, which is inserted into a slit 1b formed at the bottom of the upper slat 1 to be hooked and connected to a hook portion 1c. rail 3
A hook portion 3a formed at the upper part of the slat 1b is adapted to be similarly latched onto the lowermost slat 1b.

Next, to explain the key mechanism 2 built in the bottom rail 3, as shown in Figs. A lock cover 7, which is bent and formed on the 3rd side, is fitted and fixed.
Furthermore, a board 8 is fitted into the lock cover 7 at its center in the left-right direction, and the upper and lower ends thereof are bent toward the bottom rail 3 side. The protrusion 7a is inserted, and the board 8 is restricted from moving laterally relative to the lock cover 7. A notch 9 is formed in the center of the upper ends of the lock cover 7 and the board 8, and an operating lever 10 is rotatably supported by a shaft 11 in the center of the board 8. It is bent and protrudes to the outside of the shutter 4 via the shutter 9.

Guide pieces 7b and 7c are bent at both ends of the lock cover 7 so as to open up and down, and guide pieces 8b and 8c similar to the guide pieces 7b and 7c are bent at both ends of the board 8. At the same time, guide pieces 8d and 8c are located at symmetrical positions with respect to the axis 11 on the center side of these guide pieces 8b and 8c.
8e is formed. And the key bar 12A,
A pair of lock bars 14A, 14B configured by connecting and fixing 13B and links 13A, 13B are connected to each of the guide pieces 7b, 7c, 8b, 8c, 8d, 8.
It is mounted so as to be slid and guided by e. In this case, the key bars 12A, 12B are guided by guide pieces 7b, 7c, 8b, 8c, and the links 13A, 13B are guided by guide pieces 8d, 8e.

Both lock bars 14A, 14B are urged by a spring 15 in a direction to protrude toward the guide rails 5, 6.

In this embodiment, one end of the links 13A, 13B,
That is, arcuate engaging portions 16A, 16B are formed at the base ends of the lock bars 14A, 14B to be bent toward the substrate 8 side, and both engaging portions 16A, 16B are pivoted by the biasing force of the spring 15. The lever 11 is in contact with both sides of the operating lever 10 in the vicinity of the lever 11 . Then, as shown in Figure 3, the lock bar 1
When the tips of 4A and 14B protrude from inside the bottom rail 3 and can engage with the lock bar receivers 17 and 18 fixed to the guide rails 5 and 6,
One side of the operating lever 10 is in contact with the notch 9, thereby restricting the protrusion of the lock bars 14A, 14B.

Now, when the shutter 4 is moved down and closed, the lock bars 14A and 14B are
18, both bars 14A, 14B are pushed into the bottom rail 3 against the tension of the spring 15, but the engaging portions 16A, 16B
is the elastic biasing direction of the lock bars 14A, 14B,
In other words, since it can come into contact with the side portion of the operating lever 10 only in the direction in which it protrudes from the bottom rail 3, the lock bars 14A, 14 are
Even if B moves in the direction shown by the chain line against the action of the spring 15, the engaging parts 16A and 16B only separate from the operating lever 10, and the operating lever 10
is held in the position shown in FIGS. 3 and 5 without rotation. Therefore, when the shutter 4 is locked, the operating lever 10 does not rotate, and there is no risk of fingers or the like being pinched by the operating lever 10.

To release the shutter lock shown in FIG. 3, rotate the operating lever 10 counterclockwise about the shaft 11, and the lock bars 14A, 14B slide into the bottom rail 3 as shown in FIG. The shutter will be unlocked. The sliding of the lock bars 14A, 14B within the bottom rail 3 is restricted by the base ends of the key bars 12A, 12B coming into contact with the guides 8d, 8e.

In this embodiment, as the operating lever 10 rotates, the side portions of the lever 10 press while slidingly contacting the arcuate outer peripheral surfaces of the engaging portions 16A, 16B, so that the base ends of the lock bars 14A, 14B move in the vertical direction. The ratio of energization is reduced, and the lock bars 14A, 14B slide smoothly. Therefore, key bar 1
It is not necessary to connect the links 2A, 12B and the links 13A, 13B in a rotatable manner, and they can be simply fitted together and fixed as in this embodiment, and the structure is simple and easy to assemble, reducing costs. can be achieved.

Effects of the invention As detailed above, according to the invention, accidents such as fingers being jammed due to rotation of the operating lever when lowering and locking the shutter are eliminated.
Since the operating lever and the base end of the lock bar are not connected, the contact resistance of the connecting portion caused by operating the operating lever is alleviated. Furthermore, since the lock bar can be directly opened using a simple operation lever, the lock bar opening/closing mechanism is not complicated and mutual contact between members is reduced, so that problems are less likely to occur.

Further, the operating lever rotates about the fulcrum between the two engaging parts and comes into contact with the arcuate outer circumferential surface of the engaging part. In other words, since the lever action of the operating lever is utilized to open the lock bar, the operation can be performed with stronger force.

Furthermore, since the operating lever extends and rotates along the shutter surface, there is no need to make it protrude much beyond the shutter surface, resulting in excellent effects such as the operating lever not getting in the way.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention; Figure 1 is a rear view of the shutter, and Figure 2 is a rear view of the shutter.
An enlarged sectional view taken along line A-A in the figure, Figure 3 is B of Figure 2.
4 is a longitudinal sectional view showing a state in which the operating lever is rotated, and FIG. 5 is a perspective view of a main part showing the relationship between the operating lever and the lock bar. Shutter...4, Guide rail...5,6,
Operation lever...10, lock bar...14A,1
4B, engaging part...16A.16B, 19A, 19
B. Lock bar receiving part...17,18.

Claims (1)

[Claims for Utility Model Registration] A pair of lock bars are attached to the shutter guided by a pair of guide rails, which can be slid by operating a control lever in a direction perpendicular to both rails, and both bars are reversed from each other. A lock bar receiver is elastically biased in the direction of the shutter, restricts the tip of the lock bar from moving in the opening direction of the shutter in a state where the tip protrudes from the shutter, and allows movement in the closing direction. In the automatic locking device provided on both guide rails, an interval is provided between the base ends of both lock bars in the opening/closing direction of the shutter, and the tips of the base ends are bent to form an arc-shaped engagement part. On the other hand, an operating lever having a rotational fulcrum and extending along the shutter surface is installed between both engaging parts, and the operating lever is attached to the arcuate outer circumference of the engaging part only in the elastic biasing direction of the lock bar. An automatic locking device for a shutter, characterized in that it comes into contact with a surface.