JPS5851330Y2 - latch release device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a latch/unlock device mainly used in a locking machine for a fire protection panel that is extended into an opening in a building by being lowered from a storage position.

A known structural method for fire protection panels used to block window openings in buildings is that during normal times the panel is stored above the window, and in the event of a fire, the panel automatically lowers to block the window opening. In this method, the panel in the storage position is locked using a latch mechanism to prevent it from falling.

Therefore, the latch, which is locked in the normal lock position,
Various improvements have been made to the structure of latch devices that automatically release the latch to the unlocked position in the event of a fire, but conventional devices generally have complex structures. This has resulted in problems such as poor operational stability and cumbersome manual operations when performing maintenance and inspection of the device.

The present invention was devised to solve the above-mentioned difficulties, and the object of the present invention is to create a latch that has a compact structure of the functional part, and is easy to operate both automatically and manually so that smooth operation can be achieved. An object of the present invention is to provide a locking and disconnecting device.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

The fire prevention panel that is locked by the latch locking/disengaging device of the embodiment has an upper plate 1 and a lower plate, as shown in Fig. 1a, which shows the state when stored, and Fig. 1, which shows the state when unfolded. The board 2 is divided into two stages, upper and lower, and each board 1, 2 can be raised and lowered independently on the left and right side frames 5a of a U-shaped sash 5 attached to the outer wall 4 from the periphery of the window opening 3 upwards. Specifically, the upper plate 1 is guided in a guide groove 6 on the indoor side bored in the opposing surfaces of both side frames 5a, and the lower plate 2 is guided in the opposing surfaces. It is guided by a guide groove 7 on the outdoor side which is bored in the outside.

Incidentally, the upper and lower edges of the lower plate 2 are formed with flanges that project toward the indoor side, and a hanging plate 8 with an engaging hole 8a is provided upright in the center of the upper rib 2a. has been
And the bottom tail (in the figure, it is on the back side and cannot be seen) is
It extends below the upper plate 1 and has the function of receiving the upper plate 1 from below.

On the other hand, an upper flange 1a is formed on the upper edge of the upper plate 1 and extends toward the indoor side, and this flange 1a extends from the upper edge of the window opening 3 when the flange 1a descends to the extended position shown in Figure 1. It extends to the outside of the room and comes into contact with an unillustrated plywood plate fixed to the outer wall 4.

Further, the brim extending outward from the lower edge of the upper board 1 is in contact with the lower part of the upper brim 2a of the lower board 2, acting as a baffle for the space overlapping with the lower board 2.

The assembly of such fire protection panels is based on the structure, each panel 1,
In the unfolded state where the outside is not applied to 2, the upper panel 1
is suspended from a plywood board at the upper edge of the window opening 3, and the lower panel 2 is placed on the lower frame of the sash 2.

Next, a narrow horizontal crosspiece 9 is installed between the left and right side frames 5a near the top of the sash 5 and fixed to the outer wall 4, and a box-shaped case 10 is installed horizontally at the upper end of the sash 5. It is suspended,
In addition, a pair of left and right vertical bars 11 are erected between two left and right locations on the lower surface of the case 10 and the horizontal bar 9.

Therefore, at the tip of the pull line 13 pulled out in the horizontal direction from the winding drum of the drum-shaped retractable spring tensioner 12 attached to the rear plate of the case 10, there are two lines, the left fishing line 14A and the right fishing line 14B. As the book ropes are connected in a branched manner,
Left and right fishing cables 14A, 14B are led from the left and right ends of the case 10 to the inside of each side frame 5a via pulleys and hang down.
The lower end of the lower plate 2 is fixedly connected to a latch 15 fixed to the inner surfaces of the left and right side plates of the lower plate 2.

Here, since the elastic tension of the tensioner 12 is set to be slightly smaller than the weight of the lower plate 2, by manually pushing up the lower plate 2, the fire prevention panel in the expanded state is raised. In this case, first, the lower plate 2 is raised with a light operating force, and then, after the upper plate 1 overlaps with the upper plate 1 during the raising movement, it is raised together with the upper plate 1, and the bottom is returned to the storage position. placed.

Furthermore, when both plates 1 and 2 fall from the storage position due to their own weight, both plates 1 and 2 descend as one until the upper plate 1 hits the above-mentioned plywood plate, and then, Only the lower plate 2 is lowered and the fire protection panel is expanded, but during this lowering, the tension of the tensioner 12 always acts as a reaction force, so both plates 1 and 2 are lowered at a slow rate. It will be expanded.

By the way, as shown in FIGS. 1 to 9, the locking device of the embodiment includes a locking device 16 installed near the center inside the case 10, and a locking device 16 installed on the left side of the horizontal beam 9 directly below the vertical beam 11. It is formed by a release device 17 attached to the lower surface and an automatic operation cable 18 wired between Okaya 16 and 17.
Note that FIG. 1 and FIG. 9 show the state before the device is reset after the fire protection panel is expanded, and FIGS. 2 to 8 show the state after the same reset.

First, the structure that threatens the locking device 16 is the front plate 19a.
and a bottom plate 19b formed into an L shape, and a front plate 1.
It is formed by a fork-shaped latch mounting bracket 20 attached to the right side of the front plate 19a and an L-shaped operating arm mounting bracket 21 attached to the left side of the front plate 19a. lower front plate 19
A has a rectangular window hole 19C for escaping the latch 22.
is opened, and a pin 23 for a spring holder is planted in the lower left corner of the front plate 19a.

Next, the latch 22 made of a prismatic block has a locking pawl 22a cut diagonally downward at its front end, and an engagement step 22b formed at its rear end with a cutout in its upper half. In addition, ear shafts 24 protrude from both sides of the front part, and a pin 25 for a spring holder protrudes from the right side of the rear part.

However, the lever latch 22 brackets the ear shaft 24)
The latch 20 is inserted into the guide grooves 20a on both side plates and rests on the crosspiece 20b at the rear end of the lower edge of the bracket 20, which allows the latch 22 to freely slide in the front-rear direction and to align the ear shaft with the latch 22. The locking claw 22a is supported so as to be tiltable forward in the direction of lowering the locking claw 22a with the locking claw 24 as the center.

In addition, pin 2 installed on the upper right side of bracket) 20
6, the right side ear shaft 24 of the latch 22, and the pin 25, an L-shaped torque spring 27 is hooked together, so that the latch 22 is always returned to the horizontal position. A torque spring 29 is engaged between a pin 28 that is biased and installed in the upper left side of the bracket 20 and the left ear shaft 24 of the latch 22, so that the latch 22 The ear shaft 24 is the guide groove 20
It is urged back to return to the forward position corresponding to the leading edge of a.

Next, the support shaft 3 suspended horizontally on the upper rear end of the bracket) 20
0, the upper end of a locking lever 31 that is hollowed out from an L-shaped plate is hinged, and the locking lever 31 is extended leftward by the bias of a hinge spring 32 wound around a support shaft 30. The rocking behavior in the direction of moving the extended hem plate 31a forward is included.

A locking roller 33 serving as a locking portion is horizontally suspended on the front surface of the locking lever 31 at an intermediate height.
3 hits the engagement plate 22b of the latch 22, the above-mentioned habitual swinging of the lever 31 is normally blocked by the latch 22, and therefore, the latch 22 is prevented from forward tilting due to the collision with the rollers 33. has been done.

On the other hand, on the right rear side of the bottom plate 21a of the bracket 21, a pin 34 for a spring holder is erected.
A pivot shaft 35 is erected at the left end of a, and two actuating levers 36.
37, that is, an actuation lever 36 for automatic operation and an actuation lever 37 for manual operation are rotatably supported at two heights, upper and lower.

However, in the middle part and the tip part of the upper operating lever 36,
Each spring receiver has a pin 38 and a connecting pin 39 erected, and a return spring 40 made of a tension spring is hooked between the pin 38 and the pin 34 of the bracket 21a. A connecting plate 41 attached to the inner end of the automatic operating cable 18 is screwed to the connecting pin 39 .

In addition, pins 42 and 43 for spring holder and connection are respectively planted downward in the middle and tip of the lower operating lever 37, and the pins 42 and 43 of the base plate 19 are connected to each other. A return spring 44 is hooked in between, and the inner end of a manual operating cable 45 is tied to the connecting pin 43.

Since the lock device 16 is formed in this way, when no tension is applied to both operating cables 18.45, the upper automatic operating lever 36 is pulled by the elasticity of the return spring 40 and the third
It swings clockwise from the rotational position shown in the figure, and as a result, the tip edge of the lever 36 pushes the hem plate 31a of the locking lever 31 backward, thereby moving the locking roller 33 to the latch retaining stage 22.
b, thereby releasing the inhibition of forward tilting movement to the latch 22.

Further, the lower manual operating lever 37 is pulled by the elasticity of the return spring and remains stationary at the rotational position shown in FIG. 3.

Next, in the release device 17 attached to the horizontal beam 9, a box 46 with an open bottom faces the base, and a movable bottom plate 47 in the form of a long plate that covers the bottom opening is located at the bottom of the left end of the box 46. It is pivotally supported on a horizontally suspended hinge shaft 48,
It is supported so that it can swing downwards.

The base of a release lever 50, whose middle part is curved into a raised shape, is pivotally attached to a support shaft 49 that extends horizontally on the inner surface near the center of the bottom plate 47. 50 a is formed into a flat surface that overlaps with the bottom plate 47 when the lever 50 is tilted toward the opening side of the bottom plate 47 .

Furthermore, there is a cutout 46 near the left end of the top surface of the box 46.
When a is opened, a floating pulley 51 horizontally suspended in the space inside the box 46 faces directly below the cutout 46 a, and the operating cable 18 guided to the pulley 51 through the space inside the vertical beam 11 is exposed.
The operating side of the box 46 is pulled to the right through the inside of the box 46 and then tied to the raised portion of the release lever 50.

Note that when the release lever 50 is tilted to the right, the bottom plate 4
7 is closed and the operating lever 36 of the lock device 16 is in the rotation position shown in FIG. 3 when the tip of the lever 36 is pulled out to the left against the tension of the return spring 40. Therefore, in this state, the spring 40 is attached to the operating cable 18.
The release lever 50 is pulled in the rising direction by the reaction force, but the tip 50a of the lever 50
Since the lever 50 is connected to the bottom plate 47 via the fuse member 52, the lever 50 does not rotate as a result.

This fuse member 52 has a heat-fusible T-shaped head 52.
A is a single member that is integrally fixed to a leg plate 52b made of a long plate, and the head 52a passes through a long hole in the longitudinal direction that is opened in communication with the bottom plate 47 and the swinging end 50a. After being inserted into the box 46, the swinging end 50a is held immovable by being turned in a direction perpendicular to the longitudinal direction.

Here, the operation of the engaging/disengaging device of the embodiment configured as described above will be described.

At the potentials shown in FIGS. 2 to 8, the latch 22 is locked in the locked position as described above, so the fire prevention panel is pushed up and the hanging plate 8 of the lower plate 2 is pushed up by the latch's locking claw. 22a, the latch 22 slides backward against the elasticity of the torque spring 29, and as a result, the hanging plate 8 enters in front of the lock claw 22a, but the engagement hole 8a does not meet the lock claw 22a. At the moment of contact, the latch 22 slides back forward, whereby the retaining hole 8a engages with the lock pawl 22a, and the fire protection panel is locked in the storage position.

By the way, when the fuse member 52 is overheated due to the occurrence of a fire, the head 52a melts and releases the engagement of the release lever swinging end 50a. Pulled by the elasticity of the return spring 40, the release lever 50 is rotated in the rising direction, and as a result, the lever 50 falls to the opposite side while opening the bottom plate 47, and as a result, the operating cable 18 is released. , loosened by a dimension l.

By this loosening operation, the automatic operating lever 3 of the locking device 16
6 returns and rotates, and the latch 22 is released from the locking position to the unlocked position.As a result, the latch 22 resists the elasticity of the torque spring 27 due to the weight of the fire prevention panel applied to the lock claw 22a. It tilts forward, the fire protection panel lowers accordingly, and the window opening 3 is automatically blocked.

As shown in FIG. 1, the outer end of the manual operation cable 45 hangs below the case 10 through an outer tube 53 fixed to the bottom plate of the case 10, and a handle 54 is attached to the hanging end. Therefore, by pulling down the handle 54 against the elastic force of the return spring of the lock device 16, the latch 22 is released to the unlocked position in the same manner as described above through rotation of the manual operating lever 37. Is possible.

By the way, in the structure of the locking and disengaging device of the embodiment that operates in this way, the locking device 16 and the releasing device 17 are separately and compactly put together, and the okaya 16 and 17 are each functionally independent. The device is easy to install and provides stable operation for each function.

As described above, according to the latch engagement/disengagement device according to the present invention, the return action of the automatic operation line 18 is activated in the event of a fire, and the manual operation line 18 is activated in the event of a fire or when manual operation is required during maintenance and inspection. 45, the foot plate 31a of the common locking lever 31 is kicked, and the latch 22 is switched from the fixed state to the activated state. This has the effect of efficiently performing the same operation.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a latch locking/disengaging device showing an embodiment of the present invention, in which FIG. 3 is a plan view of the locking device, FIG. 4 is a rear view of the locking device, FIG. 5 is a side view of the same, FIG. 6 is an separated perspective view of the locking device, and FIG. 7 is a front view of the locking device. 8 is a front sectional view of the release device, FIG. 8 is a side sectional view taken along the line ■-■ in FIG. 7, and FIG. 9 is an operation diagram of FIG. 7. 19... Board, 19 a... Front plate, 2
0...Bracket, 24...Ear shaft, 2
2...Latch, 22a...Lock claw,
22b... Engagement step, 31... Locking lever, 31a... Hem plate, 36... Emotional movement lever, 37... Manual Operating lever, 18...
・・Ring operation cable, 40.44 ・・・・Return spring, 4
5... Manual operation rope, 33... Locking roller as a locking part.

Claims (1)

[Scope of utility model registration request] A circuit board 19, a latch mounting bracket 20 fixed to the back surface of the front plate 19a of the circuit board 19, and a latch 22 rotatably supported between both side plates of this bracket with ear shafts 24 and 24 on both sides of the middle. The lock pawl 22a at the tip protrudes from the window hole 19C provided in the front plate 19a, and the upper surface of the rear end forms a locking step 22b. A locking lever 31 is rotatable in the vertical direction and pivotally supported by a downward elastic force on a moving part, and when the lever rotates downward, a locking part provided on a part of the lever is formed so as to come into contact with the engagement stage 22b of the latch 22 to prevent the downward rotation of the tip locking pawl 22a of the latch 22, and a hem plate 31a extends from one side. A lever 31 and two actuating levers are rotatably supported facing the inner surface of the skirt plate 31a, that is, the side surface of the latch 22, and one lever is also connected to an automatic actuating lever 36 for automatic operation. The other lever is a manual operating lever 37 for manual operation, and by rotating each lever separately, a part of the lever is moved to the base plate 31.
The automatic operating lever 36 is formed such that the locking portion of the locking lever 31 is upwardly disengaged from the engagement stage 22b of the latch 22 by pushing the locking lever 31 upward. The hem plate 31 a is pulled by the automatic operation rope 18 against the elastic force of the constant return spring 40 and rotated by the return spring 40 due to the loosening of the automatic operation rope 18 .
The manual operating lever 37 is always pulled into a predetermined position by the elastic force of the return spring 44, and is rotated by the pulling of the operation operating cable 45 against the return spring 44. A latch engagement/disengagement device characterized by being configured to push a skirt plate 31a.