JPH1171978A - Stop device for shielding material and connecting mechanism of shielding material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop a shielding material such as a shutter, a fire screen, etc., surely at a desired place while closing an opening section having broad width without an opening even when a limit switch is not worked at the time of service interruption, etc. SOLUTION: The stop device for the shielding material is constituted so as to have a deceleration means being connected to a shaft and conducting deceleration revolution at a fixed ratio to the shaft, a rotating arm 19 fixed onto the output shaft of the deceleration means, and a stopper 26 being installed at a proper place on the frame side of the deceleration means and being brought into contact with the rotating arm 19 and preventing the revolution of the rotating arm 19. Even when a limit switch is not worked at the time of service interruption, etc., the shielding material can be stopped surely at a specified place by a contact with the stopper 26 of the rotating arm 19. The generation of openings can be obviated by coupling the lower end sections of a plurality of the shielding materials by one seat board when an opening section having broad width is closed by using the shielding materials in the connecting mechanism of the shield materials.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for opening a predetermined opening such as a shutter or a fire protection screen and stopping a closable shielding material at a desired position, and a wide opening with a plurality of shielding materials. The present invention relates to a connection mechanism of a shielding member capable of closing a door.

[0002]

2. Description of the Related Art Generally, an opening / closing shutter is often installed at the entrance of a store or the transfer port of a warehouse, and the spread of flame and smoke when a fire occurs in a passage of a building such as a building. In recent years, fire prevention screens have been arranged to prevent such problems.
Shielding materials such as shutters and fire screens
It is attached to a shaft fixed to the ceiling part so as to be able to be wound up, and a switchgear connected to the shaft is reversibly driven to rotate so as to raise the shielding material to open the opening or to remove the shielding material. It can be lowered to close the opening. Normally, when raising the shielding material, the switch is driven by the rotating force of the motor, and when lowering, the brake mounted in the switch is released, so that it gradually descends using its own weight. I try to make it. Further, when the shielding material descends and reaches a predetermined position (for example, a floor surface) and reaches an upper limit, the limit is detected by a limit switch or the like in order to stop further descending and ascending. Then, the lowering and the rising are stopped by the detection signal.

However, for example, when a fire occurs, it is necessary to immediately lower the screen of the fire protection screen and close the opening to prevent the spread of flame and smoke. Sometimes a power failure occurs at the same time, so that the fire prevention screen can be lowered by its own weight, but the limit switch for position detection does not function, so that the fire prevention screen cannot be stopped at a desired position. For this reason, the fire prevention screen descends without limitation, and the fire prevention screen becomes slack underneath, and there has been a problem that smoke and fire prevention effects cannot be obtained.

[0004] Further, when opening the opening by raising a shielding material such as a shutter or a fire protection screen, if the limit switch does not function due to a failure or the like, the shielding material is stopped at a desired position as described above. There was a problem that can not be.

On the other hand, a shielding material such as a shutter or a fire screen is generally set to have a width of about 4 to 5 m because a winding shaft is bent if the width is set to be long. Therefore, for example, when closing a wide opening having a width of about 10 m, it is not possible to cover the entirety with a single shielding material. I have to.

[0006]

As described above, in a conventional shielding material such as a shutter and a fire screen, a lower end position and an upper end position are detected by using a limit switch or the like, and the lowering and the rising are stopped. The limit switch does not function at the time of power failure or failure,
There was a drawback that the shielding material could not be stopped at the desired position.

Conventionally, when a wide opening having a width of about 10 m is covered with a shielding material, a single shielding material cannot cover the entire opening. This has the disadvantage that a gap is formed in the connection portion, and in the case of a fire protection screen, flames and smoke are diffused from this gap.

The present invention has been made to solve such a conventional problem, and a first object of the present invention is to stop a shielding material at a desired position reliably at the time of a power failure or a failure of a limit switch. To provide a stop device for the shielding member. A second object is to provide a connection mechanism of a shielding member that can cover a wide opening without a gap.

[0009]

In order to achieve the above object, the invention according to claim 1 of the present application is wound around a reversibly rotatable shaft by an electric motor to open an opening.
The closable shield is mechanically stopped at a predetermined position. Further, the invention according to claim 2 is a decelerating means connected to the shaft, the decelerating means rotating at a reduced speed with respect to the rotation speed of the shaft, a moving member engaged with an output portion of the decelerating means, and the decelerating means And a contact member that is attached to an appropriate position on the frame side and stops the moving member by coming into contact with the moving member.

According to a third aspect of the present invention, the deceleration means engages a moving member provided at an output portion at an arbitrary position,
It is characterized in that the mounting position of the moving member with respect to the output portion of the speed reduction means can be adjusted. The invention according to a fourth aspect is characterized in that an adjusting member is attached to the frame side of the deceleration means and is capable of finely adjusting an output portion of the deceleration means, and the contact member is attached to the adjustment member. Features. In the invention according to claim 5, a limit switch that comes into contact with the moving member immediately before the moving member comes into contact with the contact member is arranged on the frame side of the speed reduction unit, and a detection signal is obtained by the limit switch. In this case, the shielding material is stopped.

According to a sixth aspect of the present invention, a stopping device is connected to the shaft, and is coaxially engaged with an output portion of the speed reducing device that rotates at a reduced speed with respect to the number of rotations of the shaft. The first moving member and the second moving member to be mounted are mounted at appropriate positions on the frame side of the speed reduction means, and come into contact with the first moving member and the second moving member to stop the respective moving members. The contact member is attached to at least one end of the first moving member or the second moving member, and the moving member can be moved forward and backward in the rotation direction to finely adjust the contact position with the contact member. And fine adjustment means that can be adjusted. According to a seventh aspect of the present invention, in the sixth aspect of the invention, the deceleration means engages a first moving member and a second moving member provided at an output portion at arbitrary positions, and The mounting position of each moving member with respect to the output unit can be adjusted.

The invention according to claim 8 is the invention according to claim 6, further comprising an adjusting member attached to the frame side of the speed reduction means and capable of finely adjusting an output portion of the speed reduction means. The contact member is attached to the adjustment member.

According to a ninth aspect of the present invention, a stop device is connected to the shaft, the speed reducing means rotating at a reduced speed with respect to the rotation speed of the shaft, and a moving member engaged with an output portion of the speed reducing means. A first adjustment plate fixed to the frame of the deceleration means so as to be adjustable in angle; a second adjustment plate fixed to the first adjustment plate so as to be adjustable in angle; A first contact member formed on the adjustment plate and in contact with the moving member to prevent rotation of the moving member in one direction; and a first contact member formed on the second adjustment plate and in the other direction of the moving member. And a second contact member for preventing rotation of According to a tenth aspect, in the ninth aspect, at least one of the first contact member and the second contact member can finely adjust a contact position with the moving member. It is characterized by having fine adjustment means.

According to an eleventh aspect of the present invention, in the opening / closing device in which the opening can be opened / closed by a plurality of shielding members, the plurality of shielding members are connected by one seat plate. It is characterized by.

According to the first aspect of the present invention configured as described above, the shielding material wound around the shaft is mechanically stopped at a predetermined position. Also, the shielding member can be reliably stopped. According to the invention described in claim 2, the moving member rotates at a constant deceleration rate with respect to the rotation of the shaft, and the rotation of the moving member at a position in contact with the contact member attached to the frame side of the speed reducer. Will be forcibly blocked. Accordingly, the rotation of the shaft is also stopped at this position, so that the lowering or rising shielding material can be reliably stopped at the desired position.

According to the third aspect of the present invention, the mounting position of the moving member attached to the output portion of the speed reduction means can be arbitrarily set, so that the contact position with the contact member can be made variable. As a result, the stop position of the shielding member can be arbitrarily changed. According to the fourth aspect of the present invention, since the mounting angle of the adjusting member can be adjusted with respect to the output portion of the deceleration means, it is possible to adjust the minute angle that cannot be adjusted by the mounting position adjustment of the moving member. become. As a result, the stop position of the shielding member can be more accurately set.

According to the fifth aspect of the present invention, the contact point of the limit switch is attached immediately before the moving member comes into contact with the contact member. For example, when the limit switch does not function, for example, when the moving member comes into contact with the contact member, the lowering and the rising of the shielding material can be stopped.

According to the present invention, the first moving member and the second moving member are coaxially engaged with the output portion of the speed reduction means, and the fine adjustment means is attached to one of them. . Therefore, one of the moving members can be used for stopping the lower limit, and the other moving member can be used for stopping the upper limit. Further, the fine adjustment of the stop position can be accurately set by moving the fine adjustment means back and forth. In the invention according to claim 7, the first moving member and the second moving member can be attached to the output portion of the deceleration means at arbitrary angles, so that the contact position with the contact member can be changed. Therefore, the upper limit stop position and the lower limit stop position of the shielding material can be arbitrarily changed.

According to the eighth aspect of the present invention, since the mounting angle of the adjusting member can be adjusted with respect to the output portion of the deceleration means, the angle of rotation is too small to be adjusted by adjusting the mounting position of each moving member. Adjustments can be made. Thereby, the upper limit stop position and the lower limit stop position of the shielding material can be set with higher accuracy.

According to the ninth aspect of the present invention, the first adjusting plate can be mounted at an arbitrary angle with respect to the frame side of the speed reduction means, and the first adjusting plate can be mounted at an arbitrary angle with respect to the first adjusting plate. Since the first adjusting plate has a first abutting member and the second adjusting plate has a second abutting member, the second adjusting plate has a second abutting member. The lower limit stop position and the upper limit stop position can be set for one moving member. Further, as described in claim 10, if the fine adjustment means is provided on at least one of the contact members, the contact position with the moving member can be set with high accuracy. The stop position can be determined accurately.

According to the eleventh aspect of the present invention, when the shielding material is arranged in the wide opening, a plurality of shielding materials are connected in series and the lower ends of the shielding materials are connected by one seat plate. Thus, it is possible to prevent the occurrence of a gap when the wide opening is closed.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. The stopping device of the present invention is a device for stopping the raising and lowering of the shielding material, and can be applied to at least one of raising and lowering. 1 to 3 are configuration diagrams showing an embodiment of a take-up type shielding device to which the stopping device of the present invention is applied. FIG. 1 is a front view, FIG. 2 is a side view, and FIG. Is shown. As shown in each figure, this shielding device opens an opening surrounded by guide rails 1 and 1 erected on both right and left side surfaces, a lintel 2 and a floor surface GL arranged on a ceiling portion, The shutter is closed, and a shielding material 3 such as a shutter curtain or a fire screen, a shaft 4 disposed inside the lintel 2 and winding up the shielding material 3, and a shaft 4 connected to the shaft 4 for reversibly driving the shaft 4 It comprises a switchgear 5 for raising and lowering the shielding member 3 and a stop device 6 (see FIG. 3) which is also connected to the shaft 4 and stops the rotation of the shaft 4 at a desired position. . For example, it is used as a shutter disposed at the entrance of a store or as a fire screen disposed at a building passage or the like to prevent the diffusion of smoke and flame when a fire occurs.

FIGS. 4 and 5 are explanatory views showing how the switchgear 5 and the shaft 4 are connected. FIG. 4 is a side view, and FIG. 5 is a plan view. As shown in each figure, a sprocket 30 is attached to a tip portion of the shaft 4,
The sprocket 31 attached to the output shaft of the switchgear 5 is connected to a chain 32. Therefore, when the output shaft of the switch 5 rotates, the rotational force is transmitted to the shaft 4 by the chain 32, and the shaft 4 is driven to rotate.

Although not shown, the opening / closing device 5 has a motor for driving rotation and a brake mechanism, and uses the driving force of the motor when winding up the shielding member 3 and raising it.
When the shielding member 3 is lowered, the driving force of the motor or the brake mechanism is released, and the shielding member 3 is gradually lowered using its own weight. In addition, the output shaft of the switchgear 5 includes:
The limit switch 7 is connected, and an on / off signal is output at a position corresponding to the rotation speed of the output shaft of the switch 5. That is, the limit switch 7 is turned on at a position where the switch 5 has rotated a predetermined number of times, and the drive of the switch 5 is stopped by this signal, whereby the shielding member 3 can be stopped at the lower end position and the upper end position. become able to.

FIGS. 6 and 7 are explanatory views showing how the stopping device 6 and the shaft 4 are connected. FIG. 6 is a side view and FIG.
Shows plan views, respectively. As shown in each of the drawings, a sprocket 9 is attached to an end of the shaft 4 (an end opposite to the side to which the switch 5 is attached). A sprocket 11 is attached, and the sprockets 9 and 11 are connected by a chain 10. Therefore, when the shaft 4 rotates, the stopping device 6 also rotates.

FIGS. 8 and 9 are explanatory views showing the structure of the stopping device 6. FIG. 8 is a sectional view, and FIG. 9 is a front view. As shown, the stopping device 6 includes a casing 13 that covers the entirety, a sprocket 11, a first rotating shaft 12 that is coaxially connected to the sprocket 11,
And a gear 14a formed on the output side of the first rotating shaft 12 and a gear 13a formed on the inner surface of the casing 13, and
A revolving gear 15 that revolves around the rotating shaft 12 as the rotating shaft 12 rotates, and a central shaft 15 of the revolving gear 15.
a rotating plate 16 fixed to the rotating plate 16 and a second rotating shaft 17 installed at the center of the rotating plate 16 and rotating together with the rotating plate 16.
And a bearing 18 for supporting the second rotating shaft 17
And a rotary arm 19 attached to the output side of the second rotary shaft 17. Each element from the first rotating shaft 12 to the second rotating shaft 17 constitutes a speed reduction means.

The casing 13 is provided with the inner frame 2.
0, an outer frame 21 and an adjusting plate 22 arranged on the outer surface of the outer frame 21, and the inner frame 20 and the outer frame 21 are fixed by bolts 23. The adjusting plate 22 has four arc-shaped long holes 2 at four locations.
4 are drilled (see FIG. 9), and bolts 25 are inserted through the elongated holes 24 to be fixed to the outer frame 21. That is, with the bolt 25 loosened, the bolt 25 is
4, the adjustment plate 22 can be rotationally adjusted and fixed to the outer frame 21. Further, a stopper 26 is fixed to the outer surface of the adjustment plate 22 so that the rotation of the rotating arm 19 can be prevented.

FIG. 10 is an explanatory view schematically showing a state of connection between the second rotating shaft 17 and the rotating arm 19. As shown, a male type is provided on the output side of the second rotating shaft 17 as shown in FIG. A gear portion 17a having a gear shape is formed, while a female gear-shaped gear groove 19a that fits with the gear portion 17a is formed on the inner peripheral surface of the central opening of the rotating arm 19, and both mesh with each other. Fixed. Then, as shown in FIG. 9, the snap ring 27 prevents the rotating arm 19 from falling off. The number of teeth of the gear portion 17a is, for example, three.
Therefore, when the mounting position of the rotary arm 19 is shifted by one tooth of the gear portion 17a, (360/3)
0 = 12), it is shifted by 12 °.

Next, the operation of the present embodiment configured as described above will be described. When releasing the shield 3 shown in FIG. 1 from the closed state, the switch 5 (see FIG. 2) is rotationally driven. As a result, the shielding member 3 rises along the guide rail 1 and is wound around the shaft 4, and stops when the limit switch 7 shown in FIG. 2 is operated, and the opening is released. Further, when closing the opened opening, the shielding member 3 is gradually lowered by its own weight by loosening a brake mechanism (not shown) installed in the switch 5, and the lower end of the shielding member 3 is lowered. When the limit switch 7 detects that the seat plate 8 arranged in the section has reached a desired position (for example, a floor surface), the brake mechanism operates by this detection signal to stop the lowering of the shielding member 3.

If a power failure occurs when closing the opened opening, the shielding member 3 is lowered to close the opening by releasing the brake mechanism. However, since no power is supplied to the limit switch 7, a detection signal from the limit switch 7 cannot be obtained, and the shielding member 3 cannot be stopped at a desired stop position.

Therefore, in the stopping device according to the present embodiment, the rotating arm 1 is moved with respect to the stopper 26 shown in FIGS.
9 is set at a desired portion in advance, and the lowering of the shielding member 3 is stopped by stopping the rotation of the shaft 4 at a position where the rotating arm 19 contacts the stopper 26. That is, when the shaft 4 shown in FIG. 1 is driven to rotate, the sprocket 9 (see FIG. 6) is rotated with this rotation, and the sprocket 11 connected by the sprocket 9 and the chain 10 is also driven to rotate. . Then, the first rotation shaft 12 (see FIGS. 8 and 9) is rotated by the rotation driving force, so that the revolving gear 15 revolves around the first rotation shaft 12. The disk 16 rotates, and the second rotating shaft 17 is driven to rotate. Depending on the gear ratio of each gear at this time, the second
The rotation shaft 17 has a rotation speed reduced at a fixed ratio with respect to the rotation of the shaft 4.

Accordingly, with the rotation of the shaft 4 shown in FIG. 1, the rotary arm 19 connected to the output side of the second rotary shaft 17 rotates at a slow speed and is fixed to the adjustment plate 22. The rotation of the rotary arm 19 is stopped at the position where the rotary arm 19 comes into contact with the stopper 26 that has been set. Accordingly, the rotation of the shaft 4 is also prevented, so that the lowering of the shielding member 3 can be stopped. Therefore, if the position of the rotary arm 19 is previously set so that the rotary arm 19 and the stopper 26 come into contact with each other at the position where the shielding member 3 reaches the floor surface, the limit switch 7 shown in FIG. However, the descending shielding member 3 can be reliably stopped at a desired position.

In practice, if the lowering is set to stop at a position slightly lower than the stop position by the limit switch 7, the lowering of the shielding member 3 is normally stopped by the detection of the limit switch 7. When the limit switch 7 does not function, for example, during a power failure, the lowering of the shielding member 3 can be stopped at a position slightly below this.

As described above, in the present embodiment, even when the limit switch 7 does not function, for example, during a power failure, the shielding member 3 such as the shutter and the fire screen can be stopped at a desired portion without fail. In addition, even if the power supply is cut off in the event of a fire, the fire screen can be reliably lowered and stopped at a desired position, and safety can be improved.

As shown in FIG. 10, the second rotary shaft 17 and the rotary arm 19 are connected to a gear portion 17a and a gear groove 19a.
a, the snap ring 2
By removing the 7, the rotating arm 19 can be easily attached and detached, and the angle of the rotating arm 19 can be adjusted in units of 12 °. Thereby, the rotation stop position of the shaft 4 can be appropriately changed, and the stop position of the shielding member 3 can be adjusted. Therefore, it is also possible to set so that the shielding member 3 is stopped at a position 1 m from the floor GL, for example. Although the engagement means has been described using the gear portion 17a and the gear groove 19a as an example, an engagement means using a spline, a polygon, a key groove, or the like may be employed.

Further, when the gear portion 17a and the gear groove 19a are fitted, the angle can be adjusted only in units of 12 °, and finer adjustment than this is not possible. Therefore, the position of the stopper 26 is adjusted by rotating the adjusting plate 22 shown in FIGS. 8 and 9 with respect to the long hole 24, so that the contact position between the rotating arm 19 and the stopper 26 is relatively fine. Can be adjusted. Thereby, the stop position of the shielding member 3 can be set with higher accuracy.

In the above embodiment, the shaft 4
The example in which the switch 5 is attached to one end of the device and the stop device 6 is disposed at the other end has been described. For example, as shown in FIG. 11, the rotation shaft of the switch 5 and the stop device 6 are directly connected to each other. Alternatively, the rotation of the switch 5 may be stopped at a desired position. Further, the example in which the speed reducing means by meshing the gears is used as the stopping device 6 has been described. Alternatively, a speed reducing means in which a chain is wound around a screw rod or a large or small sprocket may be employed.

Next, a second embodiment of the present invention will be described. 12 and 13 are explanatory views showing a stopping device according to the second embodiment. FIG. 12 is a sectional view, and FIG. 13 is a front view. The stop device shown in each figure is different from the stop device shown in FIGS.
3 is different in that it is attached. That is, FIG.
In the stop device shown in FIG. 2, a limit switch 33 is mounted in the vicinity of a stopper 26 attached to the adjustment plate 22, and the limit switch 33 is turned shortly before the rotary arm 19 rotates and comes into contact with the stopper 26 to stop. It is set to be "ON".

The output signal of the limit switch 33 is connected to the switchgear 5, and the output signal is set so that a brake mechanism (not shown) mounted inside the switchgear 5 operates. That is, in the example shown in FIG. 2, the limit switch 7 is arranged in association with the output shaft of the switchgear 5, and the upper limit and the lower limit are determined by operating the limit switch at a predetermined number of rotations. In this embodiment, the limit switch 7 is used to determine only the upper limit, and the lower limit is set immediately before the rotation arm 19 comes into contact with the stopper 26.
3 detects this and operates the brake mechanism. That is, at normal times, the shielding member 3 descends, and accordingly, the rotating arm 19 rotates and the limit switch 3
At the time of contact with 3, the lowering of the shielding material 3 is stopped, and
Since the limit switch 33 does not operate during a power failure, the rotary arm 19 comes into contact with the stopper 26 and stops, as in the first embodiment. Also,
When the shielding member 3 rises, it stops at the upper limit determined by the operation of the limit switch 7.

Further, in the above, an example has been described in which only the lower limit switch 33 is fixed to the outer frame 21 of the stop device. However, the upper limit switch is similarly fixed to the outer frame 21. (Not shown).

FIGS. 14 and 15 are explanatory views showing the structure of a shield stopping device according to a third embodiment of the present invention.
As shown in the figure, this stopping device is different from that shown in FIG. 9 in that it has rotating arms for the lower limit stopper and the upper limit stopper, respectively. That is, in the above-described first embodiment, as shown in FIG. 3, the stop device 6 used as a lower limit is installed at one end of the shaft 4 to prevent the shielding member 3 from going too far downward. However, in the present embodiment, this is referred to as an upper limit / lower limit stop device 6 ′ to prevent not only the downward direction but also the excessive upward direction.

The deceleration mechanism of the upper / lower limit stop device 6 'has the same configuration as that shown in FIG. 8, and therefore its description is omitted. Based on the front view shown in FIG. 14 and the side view shown in FIG. The configuration will be described. As shown in FIG. 15, two rotation arms 42 are provided on the output shaft 41 (corresponding to the second rotation shaft 17 in FIG. 8) of the upper / lower limit stopping device 6 ′.
43 is a gear portion 17a and a gear groove 1 as shown in FIG.
9a in the same manner. Therefore, if the mounting position of the gear portion is changed, the mounting angle of each of the rotating arms 42 and 43 with respect to the output shaft 41 can be adjusted, for example, in units of 12 ° (when the number of teeth of the gear portion is 30). .

Then, of the two rotating arms 42 and 43, the rotating arm 42 installed on the inner side (the left side in FIG. 15).
Is used for stopping the lower limit, and the rotating arm 43 installed outside is used for stopping the upper limit. Also, FIG.
As in the example shown in FIG. 9, an adjusting plate 45 is provided on the outer frame 44 of the upper / lower limit stopping device 6 ′, and four arc-shaped long holes 46 ( FIG.
), And the bolt 47 is inserted into the outer frame 44. That is, the adjustment plate 45 can rotate with respect to the outer frame 44 along the long hole 46. A protruding stopper 48 is fixed to the outer surface of the adjustment plate 45.
2, 43 can be prevented from rotating.

The distal end of the upper-limit rotating arm 43 has a direction perpendicular to the longitudinal direction of the arm 43 (that is, the arm 43).
A screw hole 49 is screwed in the screw hole 49, and an adjustment bolt 50 for finely adjusting the contact position with the stopper 48 is screwed into the screw hole 49. Is fitted with an adjusting nut 51. Therefore, by rotating the adjusting bolt 50, the adjusting bolt 5 is inserted into the screw hole 49 of the upper-limit rotating arm 43.
Since the zero moves forward and backward, the contact position between the adjustment nut 51 and the stopper 48 can be finely adjusted. In addition, about the lower limit rotating arm 42, FIG.
Since the configuration is the same as that shown in FIG.

Next, the operation of the third embodiment configured as described above will be described. In the present embodiment, the shielding material 3
An upper / lower limit stop device 6 'as shown in FIGS. When the shielding member 3 reaches a desired lower limit position, the output shaft 4 is moved so that the lower rotation arm 42 comes into contact with the stopper 48.
1, the angle of attachment of the lower-limit rotation arm 42 to the output shaft 41 is set so that the upper-limit rotation arm 43 comes into contact with the stopper 48 when the shielding member 3 reaches the upper-limit position. Set the mounting angle. Actually, as described above, the mounting angle of each of the rotary arms 42 and 43 with respect to the output shaft 41 is every 12 °, so that an accurate stop position cannot be set.
Therefore, the same method as in the first embodiment, that is, the adjustment plate 4
5 is rotated with respect to the outer frame 44 to perform fine adjustment, whereby the position of the lower-limit rotating arm 42 is adjusted with high accuracy.

Accordingly, the position of the upper-limit rotating arm 43 slightly shifts, so that the adjusting bolt 50 is rotated in an arbitrary direction. To move the adjustment bolt 50 forward and backward. Therefore, the position of the adjusting nut 51 attached to the tip of the adjusting bolt 50 can be finely adjusted, and the contact position with the stopper 48 can be set with high accuracy.

As described above, in the shielding member stopping device according to the third embodiment of the present invention, the upper limit rotating arm 43 and the lower limit rotating arm 42 are provided at one end of the shaft 4 on which the shielding member 3 is wound. Upper / lower limit stop device 6 'mounted
Is installed, even if the power failure occurs and the limit switch 7 does not operate, the shielding member 3 can be reliably stopped at the upper limit position and the lower limit position.
The setting of the lower limit position and the upper limit position are respectively performed by the adjusting plate 4.
5 and the position of the adjustment bolt 50 can be accurately set, so that the desired lower limit position,
The shielding member 3 can be stopped at the upper limit position.

FIG. 16 is an explanatory view showing the structure of a shielding member stopping device according to a fourth embodiment of the present invention. In this embodiment, the number of the rotating arms is one, and the lower limit stopper 53 is provided.
The upper limit position and the lower limit position can be set by attaching the upper limit stopper 54 to an arbitrary position.

That is, as shown in the figure, a first adjusting plate 57 is fixed to the outer frame 44 of the upper / lower limit stopping device 6 ′ by bolts 62.
, A lower limit stopper 53 is arranged so as to protrude.
Therefore, the tip of the rotating arm 52 comes into contact with the lower-limit stopper 53 and the rotation is forcibly stopped.
The shielding member 3 can be restricted so as not to descend further downward. A gear portion 59 is engraved around the first adjusting plate 57.

A second adjusting plate 58 having a ring shape is provided on the outer peripheral portion of the first adjusting plate 57, and projects inward at an appropriate position on the inner peripheral side of the second adjusting plate 58. An upper limit stopper 54 is formed, and an adjusting bolt 55 is screwed into a bolt hole screwed at the tip of the upper limit stopper 54. Further, the adjusting bolt 55
An adjusting nut 56 is attached to the tip of the.

An arc-shaped gear groove 60 is formed at an appropriate position on the inner peripheral surface of the second adjusting plate 58, and meshes with a gear portion 59 formed around the first adjusting plate 57. It is designed to be fixed. That is, the second adjustment plate 58
Can be fixed at an arbitrary angle with respect to the first adjustment plate 57. Further, when the second adjusting plate 58 is fixed, a locking bolt 61 is provided to prevent the second adjusting plate 58 from dropping off.

Next, the operation of the fourth embodiment having the above configuration will be described. When setting the upper limit position and the lower limit position, first, the first adjustment plate 57 is firmly fixed to the outer frame 44 with the bolts 62, and then the mounting angle of the rotating arm 52 is appropriately adjusted, and The shielding member 3 shown in FIGS. 1 and 2 is set at the lower limit position at a position where the arm 52 comes into contact with the lower limit stopper 53. Thereafter, the meshing position between the gear portion 59 of the first adjusting plate 57 and the gear groove 60 of the second adjusting plate 58 is appropriately adjusted to obtain the second position.
Is fixed, and the position of the upper limit stopper 54 is set. That is, the mounting angle of the second adjusting plate 58 is adjusted and fixed so that the tip of the rotating arm 52 and the stopper 54 for upper limit just come into contact when the shielding member 3 reaches the upper limit position. In this state, the fixing bolt 61 is tightened to firmly fix the second adjustment plate 58.

At this time, since it is difficult to accurately adjust the contact position between the rotating arm 52 and the upper limit stopper 54, the fine adjustment is performed by reversibly rotating the adjusting bolt 55 to move the adjusting bolt 55 forward and backward. Can be. Thus, the upper limit position and the lower limit position can be set by one rotating arm 52.

As described above, in the fourth embodiment, the first adjusting plate 57 having the lower limit stopper 53 and the second adjusting plate 58 having the upper limit stopper 54 are provided.
By setting these attachment positions arbitrarily, the upper limit stop position and the lower limit stop position can be set, respectively, so that a configuration using only one rotating arm 52 is possible.

FIG. 17 is an explanatory view showing the structure of a connecting mechanism for shielding members according to a fifth embodiment of the present invention. As shown in FIG. The wide-width opening can be opened and closed by installing the wind-up shielding devices described above and moving the wind-up shielding devices up and down in conjunction with each other. And
One seat plate 34 is attached to the lower end of the shielding material wound around each shielding device, and a limit switch 7 is installed in each shielding device. When the seat plate 34 contacts the floor surface GL, the shaft 4 is stopped. According to such a configuration, even in a wide opening that cannot be covered by a single shielding device, a plurality of shielding devices can be connected and opened and closed as a whole. It is possible to surely shield the object.

[0056]

As described above, according to the present invention,
The rotation of the shaft is stopped at a predetermined position by bringing a rotating arm (moving member) that rotates at a reduced speed with respect to the rotation of the shaft into contact with a stopper (abutting member). Even when the limit switch does not function, the shielding member can be reliably stopped at a predetermined position. Further, the stop position of the shielding member can be arbitrarily set by appropriately changing the mounting angle of the stopper with respect to the output shaft of the speed reducer. Further, by finely adjusting the position of the adjustment plate, the stop position of the shielding member can be set with higher accuracy.

If a limit switch is provided near the stopper and the limit switch is set to operate immediately before the rotating arm comes into contact with the stopper, the lowering of the shielding member is normally performed by a detection signal of the limit switch. If the limit switch does not operate, for example, during a power outage, the rotating arm comes into contact with the stopper, and the lowering and rising of the shielding material is stopped. Can be stopped.

Further, two rotating arms (a rotating arm for the upper limit and a rotating arm for the lower limit) are attached to the output shaft of the speed reducer, and these are brought into contact with the stopper, so that the shielding material can be reliably secured at the upper and lower limits. Can be stopped. Adjustment bolts and adjustment nuts (fine adjustment means)
The position of contact with the stopper can be adjusted with high accuracy by moving the arm forward or backward from the tip of one of the upper and lower rotating arms, so that the stop position can be set with high accuracy. .

Further, the first and second adjusting plates are mounted on the frame of the speed reducer, and the lower limit stopper and the upper limit stopper are formed respectively, so that only one rotation is provided on the output shaft of the speed reducer. Simply by attaching the arm, the lower limit position and the upper limit position can be set.

When a plurality of winding-type shielding devices are connected in series to open and close a wide opening, the lower end of the shielding material of each shielding device is connected by one seat plate. In addition, it is possible to prevent the occurrence of a gap in a connection portion of each shielding material. Therefore, when a fire occurs,
The spread of flame and smoke can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view showing the configuration of a winding type shielding device to which a stopping device of the present invention is applied.

FIG. 2 is a side view showing a configuration of a winding type shielding device to which the stopping device of the present invention is applied.

FIG. 3 is a plan view showing a configuration of a winding type shielding device to which the stopping device of the present invention is applied.

FIG. 4 is a side view showing a state of connection between the switch and the shaft.

FIG. 5 is a plan view showing a state of connection between the switch and the shaft.

FIG. 6 is a side view showing a state of connection between the stopping device and the shaft.

FIG. 7 is a plan view showing a state of connection between the stopping device and the shaft.

FIG. 8 is a sectional view showing a detailed configuration of a stopping device.

FIG. 9 is a front view showing a detailed configuration of a stopping device.

FIG. 10 is an explanatory diagram showing a state of connection between a second rotating shaft and a rotating arm.

FIG. 11 is an explanatory view showing an example in which a stop device is directly connected to a switch.

FIG. 12 is a sectional view of a stopping device according to a second embodiment of the present invention.

FIG. 13 is a front view of a stopping device according to a second embodiment of the present invention.

FIG. 14 is a front view showing a configuration of an upper / lower limit stopping device mounted on a shielding material stopping device according to a third embodiment of the present invention.

FIG. 15 is a side view showing a configuration of an upper / lower limit stopping device mounted on a shielding material stopping device according to a third embodiment of the present invention.

FIG. 16 is a front view showing a configuration of an upper / lower limit stopping device mounted on a shielding material stopping device according to a fourth embodiment of the present invention.

FIG. 17 is an explanatory view showing a state in which a plurality of winding-type shielding devices are connected in series.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 guide rail 2 lintel 3 shielding material 4 shaft 5 switch 6 stop device 6 ′ upper / lower limit stop device 7 limit switch 8 seat plate 9 sprocket 10 chain 11 sprocket 12 first rotating shaft 13 casing 14 bearing 15 revolving gear 16 Rotating plate 17 Second rotating shaft 18 Bearing 19,52 Rotating arm (moving member) 20 Inner frame 21,44 Outer frame 22,45 Adjusting plate 23 Bolt 24,46 Slot 25,47,62 Bolt 26,48 Stopper ( Abutment member) 27 snap ring 31 sprocket 32 chain 33 limit switch 34 seat plate 41 output shaft 42 lower limit rotating arm (first moving member) 43 upper limit rotating arm (second moving member) 49 screw hole 50, 55 Adjustment bolts (fine adjustment means) 51, 56 Adjustment nut 53 Lower limit stopper 54 Upper limit stopper 57 First adjustment plate 58 Second adjustment plate 59 Gear part 60 Gear groove 61 Lock bolt GL Floor surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takahiro Yamamoto 18 Nakasu-cho, Gifu City, Gifu Prefecture Inside Fuji Transmission Co., Ltd.

Claims (11)

[Claims] An apparatus for stopping a shielding material, wherein the shielding material is wound around a shaft which can be reversibly rotated by an electric motor, and the opening of which can be opened and closed is mechanically stopped at a predetermined position. 2. A deceleration means connected to the shaft and decelerating and rotating at a rotational speed of the shaft, a moving member engaged with an output of the deceleration means, and a frame side of the deceleration means. The stopping device for a shielding member according to claim 1, further comprising: a contact member that is attached to an appropriate position and stops the moving member by contacting the moving member. 3. The speed reduction device according to claim 2, wherein a moving member provided on the output unit is engaged at an arbitrary position, and a mounting position of the moving member with respect to the output unit of the speed reduction unit is adjustable. A device for stopping a shielding material as described in the above. 4. An adjusting member attached to the frame side of the speed reduction means and capable of finely adjusting an output portion of the speed reduction means, wherein the contact member is mounted on the adjustment member. Item 3. A device for stopping a shielding material according to Item 2. 5. A limit switch that contacts the moving member immediately before the moving member comes into contact with the contact member is disposed on the frame side of the deceleration means, and when a detection signal is obtained by the limit switch, the limit switch is shielded. 3. The device for stopping a shielding material according to claim 2, wherein the material is stopped. 6. A stop device connected to the shaft, a deceleration means for decelerating and rotating at a rotational speed of the shaft, and a first coaxially engaged with an output portion of the deceleration means.
A moving member, a second moving member, and a contact member attached to an appropriate position on the frame side of the deceleration means, and brought into contact with the first moving member and the second moving member to stop each moving member; A fine member which is attached to at least one end of the first moving member or the second moving member and which is capable of moving forward and backward in the rotational direction of the moving member to finely adjust a contact position with the contact member; The stopping device for a shielding material according to claim 1, further comprising an adjusting unit. 7. The deceleration means engages a first moving member and a second moving member provided on an output portion at an arbitrary angle,
7. The stopping device for a shielding material according to claim 6, wherein a mounting position of each moving member with respect to an output portion of the speed reduction means is adjustable. 8. An apparatus according to claim 1, further comprising an adjusting member attached to the frame side of said speed reducing means and capable of finely adjusting an output portion of said speed reducing means, wherein said contact member is attached to said adjusting member. Item 7. A device for stopping a shielding material according to Item 6. 9. A deceleration means connected to the shaft and decelerating and rotating at a rotational speed of the shaft, a moving member engaged with an output portion of the deceleration means, and a frame of the deceleration means. A first adjustment plate fixed so as to be adjustable in angle with respect to the first adjustment plate; and a second adjustment plate fixed so as to be adjustable in angle with respect to the first adjustment plate.
An adjusting plate, a first contact member formed on the first adjusting plate, which is in contact with the moving member to prevent rotation of the moving member in one direction, and formed on the second adjusting plate. And a second abutting member for preventing the moving member from rotating in the other direction. 10. The apparatus according to claim 1, wherein at least one of said first contact member and said second contact member has fine adjustment means capable of finely adjusting a contact position with said moving member. 9. A device for stopping a shielding material according to claim 9. 11. An opening / closing device in which an opening can be opened and closed with a plurality of shielding materials in one opening, wherein the plurality of shielding materials are connected by one seat plate. Connection mechanism.