JPH09303029A - Locking device for shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability and facilitate locking and unlocking. SOLUTION: This device has a cylinder lock arranged in a slat 6 forming a shutter curtain 5 both the ends of which are guided by a pair of opposed guide rails 7, and a supporting means 15 formed of a pinion 16 connected to the cylinder lock, a rack member 19 and a tensile coil spring 21 to support the rotation of a cylinder lock by a key. It also has a lever member 22 interlocked and connected to the cylinder lock and made slidable along the longitudinal direction of the slat 6; an engagement piece 34 provided through a compression coil spring 37 having an energizing force extended to the tip of the lever member 22 and having a claw part 35 protruded and recessed to the slat end part 6a; and an engagement part 8 arranged within the guide rail 7 to which the claw part 35 of the engagement piece 34 is engaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter locking device provided in a shutter curtain composed of a shutter member such as a slat and for locking the shutter curtain when the shutter curtain is closed.

[0002]

2. Description of the Related Art Generally, a locking device provided in a shutter device is arranged on a slat which is easy to be operated by a person, and which has a plurality of substantially rectangular slats which are vertically connected to each other and which constitute a slat curtain. A lock part such as a cylinder lock is arranged at a position located approximately in the middle of the width direction of the slat, and the operation of the lock part causes the engaging pieces to project from both ends of the slat. The piece engages with an engaging recess in the guide rail that guides the raising and lowering of the slat curtain, so that the slat curtain is locked.

The lock portion of this locking device has a thumb turn arranged on the indoor side and a key insertion opening formed on the outdoor side. The turning operation by the thumb turn is performed from the indoor side and the key is turned from the outdoor side. It is a turning operation by.

[0004]

However, in the above-described conventional locking device, there are cases where the engaging pieces protruding from both ends of the slat by the operation of the locking portion do not engage with the engaging recesses in the guide rails. Therefore, a compression spring is provided in the middle of the engagement piece, and when the engagement recess and the engagement piece do not engage with each other when the lock portion is operated, the compression spring engages. The engaging piece is set so that it can be retracted, and a predetermined biasing force is generated by this shrinking, and the engaging piece acts as a biasing force to try to engage with the engaging recess and also engages with the engaging recess. Even when the pieces are engaged, a biasing force that constantly tries to maintain the engaged state is generated.

For this reason, when operating the lock portion, that is, at the time of locking, the turning operation must be performed with a force opposing the urging force of the compression spring, and at the time of unlocking, the urging force of the compression spring is required. In this conventional locking device, it is necessary to carefully operate the locking portion, and there has been a demand for a locking device in which the locking portion can be easily operated.

In order to solve the above problems, an object of the present invention is to provide a shutter locking device which has improved operability and which can be locked and unlocked easily.

[0007]

[Means for Solving the Problems] Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. The shutter locking device 10 of the present invention includes:
For a shutter provided in a shutter curtain 5 having both ends guided by a pair of opposed guide rails 7 and comprising a plurality of long shutter members 6 connected along the longitudinal direction of each guide rail 7. In the locking device, a cylinder lock 11 arranged at a desired position of the shutter member 6, and an assisting means 15 connected to the cylinder lock 11 for assisting rotation of the cylinder lock 11 by a key or thumb turn 13 or the like. A rod member 22 that is connected to the cylinder lock 11 and is interlocked with the rotation of the cylinder lock 11 and is slidable along the longitudinal direction of the shutter member 6, and the tip end of the rod member 22. The claw portion 3 that is provided via a biasing member 37 that has a biasing force that extends toward and away from the shutter member 6 and that moves back and forth with respect to the end portion 6a of the shutter member 6.
5 and an engaging portion 8 which is disposed in the guide rail 7 and in which the claw portion 35 of the engaging piece 34 is engaged.
And characterized in that:

The assisting means 15 is provided on the cylinder lock 11 and rotates with the rotation of the cylinder lock 11, a rack member 19 meshing with the pinion 16, and a rack member 19 on the rack member 19. The structure may be constituted by an urging means 21 which is provided and assists the sliding of the rack member 19.

Further, the pinion 16 may have a structure in which the teeth 17 are formed only between predetermined angles of the rotation angle of the cylinder lock 11 and mesh with the rack member 19 between the predetermined angles. Furthermore, it is preferable that the rack member 19 and the urging means 21 are configured in pairs.

With such a structure, when the shutter curtain 5 is locked, when the cylinder lock 11 is rotated by a key or thumb turn 13 or the like, the rotation is performed by a force against the biasing force of the biasing member 37. The operation will generate a rotational force in the same direction as the rotational direction of the locking operation by the urging force of the urging means 21 of the urging means 15, and assist the urging member 3.
The urging force of the cylinder lock 7 is substantially offset, and the cylinder lock 11 can be easily rotated without requiring a large force to improve the lock operability. Three
5 engages with the engaging portion 8 in the guide rail 7 to lock.

In unlocking, the rotation in the abrupt return direction with respect to the cylinder lock 11 generated by the biasing force of the biasing member 37 is reversed by the assisting means 15 in the direction opposite to the rotation direction of the unlocking operation. A rotational force is generated and assisted in the cylinder lock 11, and the biasing force of the biasing member 37 is substantially offset in the same manner as described above, so that the cylinder lock 11 can be easily rotated and the unlocking operability is improved. The engagement piece 34
Is retracted from the engaging portion 8 and unlocked.

By making the shape of the pinion 16 constituting the assisting means 15 a partial gear in which the teeth 17 are formed only at a predetermined angle, the meshing with the rack member 19 becomes only at the predetermined angle. As a result, the timing at which the assisting means 15 acts can be matched with the timing at which the biasing member 37 provided on the engagement piece 34 acts, and the assisting action can be effectively generated.

[0013]

1 is a front view of a shutter provided with a shutter locking device according to the present invention, and FIG. 2 is a partially cut front view showing an embodiment of the shutter locking device.

First, a shutter device 1 provided with the shutter locking device 10 of the present invention will be described.
In this shutter device 1, as shown in FIG. 1, a shutter case 3 is horizontally provided at the upper edge of an opening 2 of a building,
A shutter curtain 5 is connected to a winding shaft 4 rotatably provided in the shutter case 3.

The shutter curtain 5 has a structure in which a plurality of slats 6 as shutter members formed in a long strip shape are connected.

Both ends 6a of these slats 6 are inserted into a pair of left and right guide rails 7, 7 facing each other which are connected to the lower edge of the shutter case 3, and are guided to move in the vertical direction. Shutter curtain 5 by 4
The shutter curtain 5 is moved up and down, that is, opened and closed by winding up and rewinding.

Further, as shown in FIG. 2, the vertical bottom portions located at the back of the respective guide rails 7, 7 which support both edge portions 5a of the shutter curtain 5 and guide the ascending and descending,
A plurality of engaging portions 8 with which engaging pieces of a locking device 10 described later are engaged are provided continuously in a substantially comb-like shape.

Now, the shutter locking device 10 of the present invention provided in the shutter device 1 having the above-mentioned structure,
As shown in FIG. 1, a plurality of vertically connected slats 6 are arranged at a height position that facilitates operation when the shutter curtain 5 is closed.

As shown in FIGS. 1 and 2, the locking device 10 is provided along the left-right width direction which is the longitudinal direction of the slat 6, and has a cylinder lock 11, an assisting means 15, a rod member 22, and The engagement piece 34 and the engagement piece 34 are generally configured.

The cylinder lock 11 is a short, substantially cylindrical lock having a keyhole 12 formed at one end and a thumb turn 13 formed at the other end. The cylinder lock 11 is fixed in a substantially box-shaped case 14 so that both ends thereof are exposed to the outside of the case 14.

The case 14 is fixed to the back surface (indoor side) of the slat 6, and the key hole 12 at one end of the cylinder lock 11 is exposed on the outer surface of the slat 6 which is the outdoor side. The thumb turn 13 is provided (see FIG. 3).

The position where the cylinder lock 11 is disposed is, as shown in FIG. 1, a substantially middle position in the lateral width direction which is the longitudinal direction of the slat 6.

Next, the assisting means 15 includes a pinion 16 and
It is composed of a rack member 19 and a biasing means 21.
The pinion 16 is provided integrally with the cylinder lock 11, and in the present embodiment, as shown in FIG. 4, a small number of teeth 17 are formed between predetermined angles on both sides of the center, and A fan portion 18 having no tooth having the same diameter as the tip diameter of the tooth 17 is a partial gear formed between the respective tooth 17 portions.

Further, the rack members 19 are composed of a pair, and only a small number of teeth 20 corresponding to the pinions 16 are projectingly formed on the rod-shaped main body, and the rack members 19 are arranged on both sides of the pinions 16 so as to face each other. The case 14 can be slid.

The urging means 21 comprises a pair of tension coil springs, one end of which is connected to the end portion 19a of the rack member 19 and the other end of which is connected to the case side portions 14a and 14b. Has a biasing force to

That is, in this assisting means 15, each rack member 19 is arranged vertically with respect to the pinion 16 in FIG. 4, and the upper rack member 19 of each rack member 19 is located on the right side portion 14a of the case. The lower rack member 19 is connected to the case left side portion 14b by a tension coil spring 21.
It is connected with the tension coil spring 21 and the pinion 1
When 6 rotates and meshes with the rack member 19, the rack members 19, 19 slide in mutually opposite directions.

Next, the rod member 22, as shown in FIG.
It is composed of an interlocking portion 23 and a rod body 29. First,
The interlocking portion 23 is composed of a gear 24 and a rack plate 27.

The gear 24 is provided on the cylinder lock 11 so as to be overlapped with the pinion 16 and connected substantially integrally. As shown in FIG. 5, the teeth 25 formed on the gear 24 are formed such that their tips are bulged in a substantially quadrangular shape, and in the present embodiment, they are equidistant from each other, that is, 90. Four teeth 25 are provided at intervals, and a pair of substantially wedge-shaped teeth 26 is provided in the middle of each tooth 25.

The rack plates 27 are made up of a pair of left and right sides, each of which has a substantially rectangular shape, and has a substantially rectangular recess and a substantially stand at one edge along the longitudinal direction, as shown in FIG. The rack teeth 28 are formed by combining the convex portions of the shape. The rack plates 27 face each other with the gear 24 interposed therebetween, mesh with the gear 24 from both sides, and are arranged in the case 14 so as to substantially overlap with the rack member 19 (FIG. 3). ), The case 14 is slidable in mutually opposite directions.

Next, the rod main body 29 is a long rod-shaped member composed of a pair of left and right, and each base end thereof is connected to each rack plate 27 via a bent portion 30 formed in a crank shape. Are formed integrally with each other, and extend from both left and right side portions of the case 14, and each tip 29a extends along the back surface of the slat 6 so that each tip 29a extends toward the left and right end portions 6a of the slat 6. It is arranged so as to be slidable in the longitudinal direction.

The tip 29a of the rod body 29 has
A slit-shaped slide groove 31 is formed along the longitudinal direction, and a restricting piece 32 is projectingly provided on the base end side of the slide groove 31. Then, as shown in FIG. 6, the tip 29a of the rod main body 29 has an end 6a of the slat 6.
Is supported by the guide bracket 33 and slides in the guide bracket 33.

Next, the engaging piece 34 is in the shape of a rather short strip, and has a bifurcated claw portion 35 provided at the tip and a restriction projection 36 at the base end. As shown in FIG. 6, the engaging piece 34 has a base end side overlapping with the tip 29a of the rod body 29 in a state of overlapping with the guide bracket 3.
3 and the regulating projection 36 of the engaging piece 34.
Is arranged so as to slide in the slide groove 31 of the rod body tip 29a, and is urged between the restriction projection 36 of the engagement piece 34 and the restriction piece 32 facing the restriction projection 36. A compression coil spring 37 as a member is interposed.

Next, the operation of locking and unlocking by the locking device 10 described above will be described. First, when the shutter curtain 5 is opened / closed, the locking device 10 is not operated, that is, as shown in FIG. 2, the engagement pieces 34 of both ends 6a of the slat are in an unlocked state in which they are retracted from the both ends 6a. And the shutter curtain 5 inside the guide rail 7
This shutter curtain 5 does not project on the movement trajectory of
It does not interfere with the vertical movement of the.

In this unlocked state, as shown in FIG. 4, the teeth 20 of each rack member 19 constituting the assisting means 15 and the teeth 17 of the pinion 16 do not mesh with each other, and the outer periphery of the fan portion 18 of the pinion 16 is The rack member 19 is in contact with the main body of the rack member 19, the teeth 20 of the rack member 19 are engaged with the fan portion 18 of the pinion 16, and the sliding of the rack member 19 by the tension coil spring 21 is restricted. Has become. In this unlocked state, in the present embodiment, the keyhole 12 and thumb turn 13 of the cylinder lock 11 are
As shown in FIG. 4, it is vertical.

Next, when the shutter curtain 5 is closed and locked, the key is inserted into the cylinder lock 11 from the outdoor side of the shutter curtain 5 or the thumb turn 13 is picked from the indoor side to lock the cylinder lock 11 into a book. In the embodiment, it is rotated clockwise as shown in FIG.

Then, the gear 24 of the interlocking portion 23 constituting the rod member 22 connected to the cylinder lock 11 and the pinion 16 constituting the assisting means 15 start rotating together with the cylinder lock 11, and with this rotation, Gear 2 of interlocking part 23
By the rotation of 4, both rack plates 27 start sliding in mutually opposite outer directions, the engaging pieces 34 of the rod member tips 22 begin to project from both ends 6a of the slat 6, and FIG.
As shown in (b), the pinion 16 has both rack members 19
Without engaging with, the fan portion 18 runs idle in the clockwise direction in the figure (arrow line in the figure).

As the rotation further progresses, in the present embodiment, as shown in FIG.
As shown in (c), the keyhole 12 and thumb turn 13 have 90
In the rotated state, the gear 24 of the interlocking portion 23 rotates to cause the engagement piece 34 at the tip of each rod member 22 to project from the slat end portion 6a by a predetermined length via both rack plates 27.
The predetermined length of the protruding engagement piece 34 from the slat end portion 6a is equal to the distance from the slat end portion 6a in the guide rail 7 to the engagement portion 8, that is, both engagement pieces 34 at this time. The claw portion 35 at the tip thereof engages with the engaging portion 8 in the guide rail 7.

Then, when the rotation by the key or thumb turn further proceeds, the rod main body 29 interlocked with the cylinder lock 11 slides further in the advancing direction via the rack plate 27, thereby engaging with the engaging portion 8. The rod main body 29 further slides in the advancing direction with respect to the engaged engagement pieces 34, and the compression coil spring 37 is compressed by the sliding distance of the rod main body 29, so that this distance. (Length) is absorbed, that is, the compression coil spring 37 applies an urging force that causes the engaging piece 34 to retreat with respect to the tip 29a of the rod body 29, and constantly causes the engaging piece 34 to project from the rod body 29. When it is generated, the engagement state with the engagement portion 8 is made more reliable.

At the same time, with the rotation of the cylinder lock 11, the pinion 16 of the assisting means 15 starts to engage with the rack member 19 as shown in FIGS. 7 (c) and 7 (d). Then, the tension coil spring 2 connected to the rack member 19
The pulling biasing force of 1 acts to generate a force for slidingly moving the rack member 19, and the sliding assists the rotation of the pinion 16 meshing with the rack member 19.

That is, by the tension coil spring 19,
The rotation operation of the cylinder lock 11 is assisted by generating a rotation force in the same direction as the rotation operation from the middle, and by this, by the biasing force of the compression coil spring 37 which tends to project the engaging piece 34 described above. The repulsive force of the rotational action on the cylinder lock 11 is weakened so as to substantially cancel the rotation to facilitate the rotation of the cylinder lock 11.

Then, as shown in FIGS. 7 (e) and 10, the cylinder lock 11 is unlocked from the unlocked state by a key or the like 18
When the key is used, the key is removed and the locked state is achieved.

In this locked state, as shown in FIGS. 8 and 9, both engagement pieces 34 are in engagement with the engagement portion 8 in each guide rail 7, and this engagement state is the same. Since the urging force of the compression coil spring 37 that tries to maintain the locking force is generated, even if the slat 6 is swung in the left-right width direction between the left and right guide rails 7, these engagement states are not released and the locking Stay in the state.

During this operation, the gears 24 of the interlocking portion 23 constituting the rod member 22 and the teeth 25 and 28 of the rack plates 27 meshing with the gears 24 are formed in a substantially rectangular shape. Therefore, the rack plates 27 can be slid by the rotation of the gears 24, but the gears 24 are prevented from rotating by the sliding of the rack plates 27, that is, the rotation of the cylinder lock 11. When the rack is stopped, each rack plate 27 remains at that position, whereby the locked state in which the engagement piece 34 and the engagement portion 8 are engaged with each other is maintained.

Further, when the shutter curtain 5 is not completely closed at the time of this locking, the claw portions 35 of the respective engaging pieces 34 that have advanced move forward with the engaging portion 8 in the guide rail 7 in the vertical direction. There may be a case where the position of the engaging piece 34 and the rod main body 29 are not accurately engaged.
Since the compression coil spring 37 is interposed between the engaging piece 34 and the end portion 6a of the rod body 29 and the slat 6, the engaging piece 34 that has an incomplete advance has a biasing force that tends to protrude. In this state, the compression coil spring 37 is not retracted, and the operations of the other parts are not stopped midway.
Therefore, when the shutter curtain 5 is moved up and down after the locking operation, the claw portion 35 of each engagement piece 34 is engaged with each engagement portion 8 because the urging force always tries to engage with each other. It will be.

Next, in order to unlock the locking device 10, a key is inserted into the cylinder lock 11 or the thumb turn 13 is inserted.
Is picked up, and is rotated in the opposite direction to that in the locking, in the present embodiment, in the counterclockwise direction as shown by the arrow in FIG. 7 (e).

Then, the gear 24 of the interlocking portion 23 constituting the rod member 22 connected to the cylinder lock 11 and the pinion 16 constituting the assisting means 15 start rotating together with the cylinder lock 11, and with this rotation, Gear 2 of interlocking part 23
By the rotation of 4, the both rack plates 27 start sliding in the mutually opposite inward direction, and the pinion 16 moves the both rack members 1
9, and starts rotating in the counterclockwise direction in FIG.

At this time, as the rack plate 27 slides, both rod main bodies 29 start to slide inwardly, but the engaging piece 3
4, the rod body 29 slides at a speed due to the urging force of the compression coil spring 37 which is compressed during locking and accelerates the rotation of the gear 25 through each rack plate 27. Try to.

However, at the same time, the tension coil springs 21 connected to the rack members 19 restrict the rotation of the pinion 16 engaged with the tension coil spring 21. In other words, the pinion 16 is rotated in the opposite direction (clockwise direction). ), The rotation speed of the gear 25 is assisted to be substantially canceled, and the rotation of the cylinder lock 11, that is,
The key or thumb turn 13 does not rotate rapidly.

Further, when the rotation by the key or thumb turn 13 advances, the compression coil spring 37 expands to release this urging force, and thereafter, as the cylinder lock 11 rotates, both rod main bodies 29 move through the rack plate 27 and the rod body 29. Sliding, and the respective engagement pieces 34 start to retract, whereby the claw portions 35 are released from the engagement state with the engagement portions 8.

When the rotation by the key or thumb turn 13 further advances, the rod member 22 connected to the cylinder lock 11 further retracts via the rack plate 27, and the engaging piece 3
4 is disengaged from the engaging portion 8 and retracts to the slat end portion 6a to be unlocked.

At the same time that the biasing force of the compression coil spring 37 on the rod body 29 and the rack plate 27 is released, the pinion of the assisting means 15 is disengaged from the rack member 19 (FIG. 7 (c)). ), The biasing force of the tension coil spring 21 connected to the rack member 19 is not transmitted to the pinion 16, and the fan portion 18 of the pinion 16 contacts both rack members 19, that is, the pinion 16 rotates in the counterclockwise direction in the idle direction. start.

Then, the cylinder lock 11 is rotated 180 ° from the locked state, the unlocking operation is completed, and the state shown in FIGS. 2 to 6 is reached. When the key is used, the key is removed and unlocked. .

Therefore, in the shutter locking device 10 thus configured, the engaging piece 34 that engages with the engaging portion 8 in the guide rail 7 is provided, and the engaged state, that is, the locked state is maintained. When the cylinder lock 11 is operated, the repulsive force generated by the urging force of the compression coil spring 37, which is the urging member, that opposes the rotation of the cylinder lock 11 during the locking / unlocking operation is generated by the assisting means 15 connected to the cylinder lock 11. It becomes possible to assist the rotation of
Since the repulsive forces are substantially offset and weakened, it becomes possible to facilitate the rotational operation of the cylinder lock 11.

That is, during the locking operation, the cylinder lock 11 is rotated by a force that opposes the biasing force of the compression coil spring 37, but the tension coil spring 21 which is the biasing means of the assisting means 15 is pulled. By the force, a rotational force in the same direction as the rotation direction of the locking operation is generated and assists, the biasing force of the compression coil spring 37 is substantially offset, and the rotation operation of the cylinder lock 11 is easy without requiring a large force. Therefore, the operability of locking will be improved.

Further, at the time of unlocking operation, the compression coil spring 3
The abrupt return direction rotation of the cylinder lock 11 generated by the biasing force of 7 causes the assisting means 15 to generate and assist the cylinder lock 11 with a rotational force in a direction opposite to the rotational direction of the unlocking operation. , Same as above, compression coil spring 3
The urging force of the cylinder lock 7 is substantially canceled out, the rotation operation of the cylinder lock 11 is facilitated, and the unlocking operability is improved.

Then, according to the present embodiment described above,
Since the shape of the pinion 16 that constitutes the assisting means 15 is a partial gear in which the teeth 17 are formed only between predetermined angles,
The meshing with the rack member 19 is only within the predetermined angle, and the timing at which the assisting means 15 acts is
It is possible to match the timing at which the compression coil spring 37 provided in the engagement piece 34 acts, and it is possible to effectively generate the assisting action.

Further, the rack member 19 which constitutes the assisting means 15 and the tension coil spring 21 which is the urging means have a pair of constitutions, respectively, so that the pinion 1 is well balanced.
Since the rotation of 6 can be assisted and the spring force of each does not have to be set large, the configuration can be inexpensive.

In the above-described embodiment, the tension coil spring 21 as the biasing means constituting the assisting means 15,
The spring force of each compression coil spring 37 as an urging member interposed between the engagement piece 34 and the rod member 22 is not described in detail, but the compression coil spring 37 is
The tension coil spring 21 is set to 3.5 to 4 kgf / cm ^2.
Is slightly smaller than the compression coil spring 37, 2.5 to
It is preferably set to 3.5 kgf / cm ² .

Further, in the above-described embodiment, the rod member 2
2 is composed of a long rod-shaped member reaching the end 6a of the slat 6 from the position of the cylinder lock 11, and the tip 29a located at the slat end 6a has a compression coil spring 37 as an urging member and an engaging piece. Although the example of configuring 34 and
The rod member 22 is formed in a short length, the rack plate 27 in the above-mentioned embodiment is also used as the rod body 29, and the engaging piece 34 is used.
Is formed to be long, and the rod main body 29 and the long engaging piece 34 are formed.
A compression coil spring 37 may be provided between the compression coil spring 37 and the compression coil spring 37, that is, the compression coil spring 37 may be configured in the case 14 described above.

Further, in the above-described embodiment, an example in which the gear 24 of the interlocking portion 23 and the rack plate 27 constituting the rod member 22 are constituted by the teeth 25 and 28 of substantially rectangular shape has been described. There is no limitation.

Further, the urging member 37 and the urging means 21 of the assisting means 15 are not limited to the compression coil spring and the tension coil spring, respectively, and may be constructed by appropriately combining them.

Further, the above effect can be obtained even if the shutter member is formed of a panel plate rather than the shutter member composed of the strip-shaped slats 6 as described above, and further, the lateral opening / closing operation is performed. It is also effective for pull shutter devices.

[0063]

As described above, in the locking device for a shutter according to the present invention, the engaging piece that engages with the engaging portion in the guide rail is provided, and the engaged state, that is, the locked state is to be maintained. The repulsive force generated by the urging force of the urging member, which opposes the operation of rotating the cylinder lock during the locking / unlocking operation, assists the rotation during the cylinder lock operation by the assisting means connected to the cylinder lock. The forces are substantially offset and weakened, which has the effect of facilitating the rotation operation of the cylinder lock.

That is, during the locking operation, the cylinder lock is rotated by a force that opposes the urging force of the urging member, but the urging force of the urging means of the assisting means rotates the locking operation. A rotational force in the same direction as that of the direction is generated to assist, and the biasing force of the biasing member is substantially offset by this, so that the cylinder lock can be easily rotated without requiring a large force. Therefore, the operability of locking can be improved.

Further, during the unlocking operation, the rotation in the abrupt return direction with respect to the cylinder lock generated by the urging force of the urging member causes the assisting means to apply a rotational force in a direction opposite to the rotation direction of the unlocking operation to the cylinder lock. As described above, the urging force of the urging member is substantially offset, the rotation operation of the cylinder lock is facilitated, and the unlocking operability is improved.

By configuring the shape of the pinion forming the assisting means as a partial gear having teeth formed only within a predetermined angle, meshing with the rack member is achieved only within the predetermined angle. The timing at which the assisting means acts can be matched with the timing at which the biasing member provided in the engagement piece acts, and the assisting action can be effectively generated.

Further, by forming the pair of the rack member and the biasing means constituting the assisting means, the rotation of the pinion can be assisted in a well-balanced manner, and the respective spring forces can be set to be large. Even if it is not provided, a sufficient assisting effect can be obtained, so that the configuration can be made at a low cost.

[Brief description of drawings]

FIG. 1 is a front view of a shutter provided with a shutter locking device according to the present invention.

FIG. 2 is a partially cut front view showing an embodiment of the locking device for the shutter.

FIG. 3 is a plan view of the locking device.

FIG. 4 is a front view showing an assisting means constituting the locking device.

5 is a sectional view taken along line VV in FIG.

FIG. 6 is a plan sectional view of a shutter member end portion of the locking device.

7 (a) to 7 (e) are explanatory views of the operation of the assisting means constituting the locking device.

FIG. 8 is a front view showing a locked state of the locking device.

FIG. 9 is a plan sectional view of the shutter member end portion in the locked state.

FIG. 10 is a schematic plan sectional view of the rod member in the locked state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Shutter device 5 ... Shutter curtain 6 ... Shutter member (slat) 6a ... End 7 ... Guide rail 8 ... Engagement part 10 ... Locking device 11 ... Cylinder lock 15 ... Assisting means 16 ... Pinion 19 ... Rack member 21 ... Attached Biasing means (tensile coil spring) 22 ... Rod member 34 ... Engaging piece 35 ... Claw portion 37 ... Biasing member (compression coil spring)

Claims (4)

[Claims] 1. A shutter provided in a shutter curtain, which is constituted by a long shutter member whose both ends are guided by a pair of opposed guide rails and which is connected in plural along the longitudinal direction of each guide rail. In the locking device for a lock, a cylinder lock disposed at a desired position of the shutter member, an assisting unit that is connected to the cylinder lock and assists rotation of the cylinder lock by a key or the like, and is connected to the cylinder lock. A rod member that is slidable along the longitudinal direction of the shutter member in conjunction with the rotation of the cylinder lock, and a tip end of the rod member that has an urging force extending toward the tip end. An engaging piece that is provided via a biasing member and that has a claw portion that advances and retreats with respect to the end portion of the shutter member; and that is disposed in the guide rail, and the claw portion of the engaging piece is engaged. Shutter locking device being characterized in that comprising a Rukakarigo unit. 2. The pinion, which is disposed in the cylinder lock and rotates together with the rotation of the cylinder lock,
2. The shutter locking device according to claim 1, comprising a rack member that meshes with the pinion, and a biasing unit that is disposed on the rack member and that assists sliding of the rack member. 3. The pinion has teeth formed only between predetermined angles of the rotation angle of the cylinder lock, and meshes with the rack member between the predetermined angles.
The shutter locking device described. 4. The rack member and the biasing means,
The locking device for a shutter according to claim 2 or 3, wherein each of the locking devices comprises a pair.