JP2005282267A - Entrance sheet opening/closing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that installation places for a manual operation part (a handle shaft part 14a and a manual winding wheel 20) for rotating an input shaft 14 to open an opening/closing sheet and an encoder are not limited because an opening/closing shaft 3 and the input shaft 14 are always interlocked with each other. <P>SOLUTION: The entrance sheet opening/closing machine is provided with the opening/closing shaft 3, which rotates when the opening/closing sheet opens an entrance by the elastic force of a spring and when the opening/closing sheet closes the entrance by its own weight, the input shaft 14 interlocked with the opening/closing shaft 3, and a governor 22 and a brake 23 which can be interlocked with the input shaft 14. An accelerating mechanism 17, which makes the rotational frequency of the input shaft 14 larger than that of the opening/closing shaft 3, is interposed between the opening/closing shaft 3 and the input shaft 14. A one-way clutch 21, which transmits the rotation of the input shaft 14 to the governor 22 and the brake 23 when the opening/closing sheet is closed, and also, functions so as not to transmit the rotation of the input shaft 14 to the governor 22 and the brake 23 when the opening/closing sheet is opened, is interposed between the input shaft 14 and the governor 22/the brake 23. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an entrance / exit sheet opening / closing machine for a fire protection compartment installed, for example, in front of an elevator door.

In the following Patent Document 1, in the lifting speed adjusting means 33, as shown in FIGS. 1 and 6, the shaft portion 30a (opening / closing shaft) of the drum 8 that winds up the screen curtain 5, the speed increasing means 34, and the centrifugal brake 35 The clutch means 32 is interposed between the input shaft to the speed reducing means 31 provided with the
Japanese Patent No. 3447284

  In the clutch means 32, the shaft 30a of the drum 8 and the input shaft to the speed reducer 31 are completely disconnected in order to deactivate the speed reducer 31 so as not to hinder the upward movement of the screen curtain 5. The drum 8 is free to rotate. Incidentally, the speed increasing means 34 increases the rotational speed of the output transmitted to the centrifugal brake 35 from the shaft portion 30a (opening / closing shaft) of the drum 8 having a relatively small rotational speed through the clutch means 32 and the input shaft to the speed reducing means 31. Thus, the function of the centrifugal brake 35 is enhanced.

  However, when the screen curtain 5 is lifted together with the lowering weight 10 when the screen curtain 5 is raised, it is not easy to lift the screen curtain 5 although the torsion spring 25 assists the lifting momentum.

  Therefore, when a manual operation unit for manually raising the screen curtain 5 is provided, the connection between the shaft portion 30a (opening / closing shaft) of the drum 8 and the input shaft to the speed reduction means 31 is disconnected by the clutch means 32. The manual operation portion cannot be provided on the 31 side, and the manual operation portion must be provided on the shaft portion 30a side of the drum 8, and there is a problem that the installation place of the manual operation portion is limited.

  In addition, when the encoder is installed when the screen curtain 5 is opened and closed and the stop position of the screen curtain 5 is controlled, there is a problem that the installation location of the encoder is limited as in the case of the manual operation unit.

  The present invention provides an entrance / exit seat opening / closing machine which is improved so that the opening / closing shaft and the input shaft are always connected to each other, and the installation place of the driving means such as the manual operation unit and the encoder is not limited. It is an object.

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 5) of the embodiments described later.
The doorway opening / closing machine according to the invention of claim 1 is configured as follows.
An opening / closing shaft (3) that rotates when the opening / closing sheet (8) opens the entrance / exit (9) by the biasing means (7) and when the opening / closing sheet (8) closes the entrance / exit (9) by its own weight, and the opening / closing shaft An input shaft (14) interlocked with (3), and a governor (22) and a brake (23) capable of interlocking with the input shaft (14) are provided.

  Between the opening / closing shaft (3) and the input shaft (14), there is provided a speed increasing mechanism (17) such as a gear mechanism that makes the rotational speed of the input shaft (14) larger than the rotational speed of the opening / closing shaft (3). Intervene. For example, the opening / closing port (9) is opened by winding the opening / closing sheet (8) around the rotating drum (6) by a spring (7) as an urging means provided in the rotating drum (6) interlocked with the opening / closing shaft (3). Then, the opening / closing sheet (8) is pulled out from the rotating drum (6) to close the entrance / exit (9).

  A clutch (for example, a one-way clutch 21) is interposed between the governor (22) and the brake (23) and the input shaft (14). The clutch (21) transmits the rotation of the input shaft (14) to the governor (22) and the brake (23) when the open / close seat (8) is closed, and also the input shaft (14) when the open / close seat (8) is opened. Functions to prevent the rotation of the motor from being transmitted to the governor (22) and the brake (23). For example, the clutch (21) is provided on the outer periphery of the input shaft (14), and the governor (22) and the brake (23) are provided on the outer periphery of the clutch (21). Further, for example, the governor (22) has a speed adjusting function for adjusting the closing speed of the opening / closing sheet (8) to be constant, and can rotate with the input shaft (14) via the clutch (21). (24) and a pressure contact body (27, 28, 30) capable of changing the frictional contact pressure according to the centrifugal force of the rotating body (24), and the brake (23) is connected to the input shaft (14). A rotating body (24) that can be linked via a clutch (21) and a pressure contact body (31, 35, 36) that frictionally contacts the rotating body (24) so as to brake the rotating body (22). The body (24) and the rotating body (24) of the brake (23) are also used.

  In the invention of claim 1, the input shaft (14) and the opening / closing shaft (3) are always interlocked via the speed increasing mechanism (17) regardless of the clutch (21) when the opening / closing seat (8) is opened or closed. doing. For this reason, the drive means (14a, 20) as in the invention of claim 2 and an encoder such as an encoder for controlling the stop position of the open / close seat (8) are not limited to the open / close shaft (3) side but the input shaft (14) side. Even if installed, the functions of the drive means (14a, 20) and the encoder can be effectively exhibited over the entire opening / closing movement region of the opening / closing sheet (8). Since the clutch (21) is interposed between the governor (22) and the brake (23) and the speed increasing mechanism (17), the speed increasing mechanism (17) is separated from the governor (22) and the brake (23). , Can be a compact structure.

  In the invention of claim 2 based on the invention of claim 1, drive means (14a, 20) for rotating the input shaft (14) so as to open the opening / closing sheet (8) is provided. As the driving means, for example, an electric motor may be used in addition to the manual operation units (14a, 20). In the invention of claim 2, when the input shaft (14) is rotated by the driving means (14a, 20), the opening / closing sheet (8) can be easily opened together with the urging means (7). Incidentally, since the speed increasing mechanism (17) causes the rotational speed of the input shaft (14) to be larger than the rotational speed of the opening / closing shaft (3), the opening / closing seat (8 ) Can be opened. Moreover, when an encoder is installed on the input shaft (14) having a large number of rotations, the encoder can detect the closed position and the open position of the open / close seat (8) at short intervals, and the detection accuracy can be improved.

  According to a third aspect of the invention based on the first or second aspect of the invention, there is provided switching means (37) for switching the brake (23) between a braking state (P) and a braking release state (Q). Yes. For example, in the switching means (37), the switching shaft can be rotated so that the pressure contact bodies (31, 35, 36) of the brake (23) are switched between the braking state (P) and the braking release state (Q). (33) is provided. In the invention of claim 3, the opening and closing movement of the opening and closing sheet (8) can be performed smoothly.

  In the invention of claim 4 based on the invention of claim 1, claim 2 or claim 3, the opening / closing shaft (3) is prevented from rotating when the opening / closing sheet (8) is closed, and the opening / closing sheet (8 ) For adjusting the closed position is provided. For example, the position adjusting means (41) includes one or a plurality of (two or more) stoppers (44) supported by a male / female screw mechanism (42) with respect to the opening / closing shaft (3). (44) is moved back and forth in the axial direction of the open / close shaft (3) by the male / female screw mechanism (42) as the open / close shaft (3) rotates, and stops by contacting the positioning portion (46). The closing movement of the opening / closing sheet (8) can also be stopped to adjust the closing position of the opening / closing sheet (8). Incidentally, the stopper (44) is one in which rotation stopper teeth are arranged on the outer periphery in the circumferential direction (for example, an external gear). In the invention of claim 4, the position adjustment means (41) can adjust the closed position of the opening and closing sheet (8) to set the optimum state. Incidentally, when a plurality of stoppers (44) are provided, the position of the opening / closing sheet (8) can be easily adjusted.

  Unlike the prior art, the present invention can provide an entrance / exit sheet opening / closing machine in which the installation location of the predetermined drive means (14a, 20) and encoder is not limited.

Hereinafter, the doorway sheet opening / closing machine concerning one Embodiment of this invention is demonstrated with reference to FIGS.
As shown in FIG. 1, a case 2 is provided on the ceiling at the upper ends of both guide pillars 1 installed on the floor F. A main shaft 4 of the opening / closing shaft 3 is supported in the case 2 so as to be rotatable between both bearings 5. A rotating drum 6 is attached to the outer periphery of the main shaft 4 so as to rotate integrally with the main shaft 4. A torsion coil spring 7 (biasing means) is wound around the outer periphery of the main shaft 4 in the rotating drum 6. When the rotating drum 6 rotates together with the main shaft 4 by the elastic force of the torsion coil spring 7, the opening / closing sheet 8 rises along the both guide columns 1 and is wound around the outer periphery of the rotating drum 6. Is opened. When the rotating drum 6 rotates together with the main shaft 4 against the elastic force of the torsion coil spring 7 due to its own weight, the opening / closing sheet 8 descends along both guide pillars 1 and is pulled out from the outer periphery of the rotating drum 6. The entrance / exit 9 between the guide pillars 1 is closed by the opening / closing sheet 8.

Next, the seat lifting adjustment device 10 installed in the case 2 will be described in detail.
In addition to the main shaft 4, the opening / closing shaft 3 has an interlocking shaft 12 connected to the main shaft 4 via a joint 11. As shown in FIG. 2, the interlocking shaft 12 and the input shaft 14 are rotatably supported by bearings 15 and 16 in the housing 13, respectively, and a gear 18 attached to the interlocking shaft 12 and the input A gear 19 attached to the shaft 14 is engaged with each other, and the gears 18 and 19 constitute a speed increasing mechanism 17 by a gear mechanism. The speed increasing mechanism 17 makes the rotational speed of the input shaft 14 larger than the rotational speed of the interlocking shaft 12 of the opening / closing shaft 3. A handle shaft portion 14a (driving means that is a manual operation portion) is provided at an end portion of the input shaft 14 outside the housing 13. The input shaft 14 is attached with a manual hoisting wheel 20 (driving means that is a manual operation unit) around which an operation cord 20a is wound, and an encoder that detects a closed position and an open position of the open / close seat 8 (see FIG. Not shown) is installed.

  An existing one-way clutch 21 is fitted on the outer periphery of the input shaft 14. A governor 22 and a brake 23 are arranged on the outer periphery of the one-way clutch 21 so as to be aligned along the axial direction of the input shaft 14.

  In the governor 22, a rotating body 24 is fitted on the outer periphery of the one-way clutch 21, and a pair of support shafts 25 and 26 are inserted on both sides of the rotating body 24. As shown in FIG. Both movable press-contact bodies 27 and 28 urged so as to approach each other by the tension coil spring 29 are pressed against the both support shafts 25 and 26 at both ends thereof. When the rotating body 24 rotates, both the movable press contact bodies 27 and 28 are separated from each other against the elastic force of the tension coil spring 29 by the centrifugal force of the rotating body 24 and are pressed against the fixed press contact body 30, and the centrifugal force Accordingly, the frictional contact pressure between them is changed.

  In the brake 23, a pair of support shafts 32 and 33 are inserted on both sides of the housing 13 inside the press contact body 31 provided on the rotating body 24 of the governor 22, and as shown in FIG. Both movable press-contact bodies 35 and 36 urged so as to approach each other by the two tension coil springs 34 are pressed against the both support shafts 32 and 33 at both ends thereof. As shown in FIG. 4, in the switching means 37 of the brake 23, one support shaft 33 (switching shaft) rotates together with the lever 38, and operates automatically based on a signal from a fire alarm (not shown). When the lever 38 is rotated against or by the elastic force of the tension coil spring 40 by the device 39, the braking state P shown in FIG. 5 (a) and the braking release state Q shown in FIG. 5 (b). And take. In this braking state P, the two movable pressurizing bodies 35 and 36 pressed by the support shaft 33 are separated from each other against the elastic force of the two tension coil springs 34, and are rotated by frictional contact with the pressurizing body 31 of the rotating body 24. Brakes the body 24. In this braking release state Q, the pressing of the two movable pressure contacts 35 by the support shaft 33 is released, and the braking of the rotating body 24 by the two movable pressure contacts 35 and 36 is released.

  In the interlocking shaft 12 of the opening / closing shaft 3, a position adjusting means 41 for the opening / closing sheet 8 is provided between both the bearings 15 using a male and female screw mechanism 42. In the female / male screw mechanism 42 of the position adjusting means 41, the female screw portions 44 a of the two stoppers 44, 44 (spur gears) are screwed into the male screw portion 43 provided on the interlocking shaft 12 and attached to the housing 13. The outer teeth of the stoppers 44 and 44 are engaged with the anti-rotation guide 45. A lower limit positioning plate 46 and an upper limit positioning plate 47 are screwed to both sides of the male screw portion 43 of the interlocking shaft 12. When the interlocking shaft 12 rotates, the stoppers 44 and 44 reciprocate in the axial direction along the rotation guide 45 between the upper and lower positioning plates 46 and 47. When one of the stoppers 44 comes into contact with the lower limit positioning plate 46, the rotation of the interlocking shaft 12 is stopped, and the closing movement of the opening / closing sheet 8 is stopped along with the stop. The closing position of the opening / closing sheet 8 can be adjusted by changing the screwing positions of the stoppers 44 and 44 with respect to the male screw portion 43 of the interlocking shaft 12 and the positioning plates 46 and 47.

  Normally, the opening / closing seat 8 is opened at the doorway 9 in front of the door of the elevator and the brake 23 is held in the braking state P. For example, when the automatic closing device 39 is activated based on a signal from a fire alarm (not shown) and the brake 23 is in the braking release state Q, the opening / closing sheet 8 is closed by its own weight. At that time, the rotation of the opening / closing shaft 3 is transmitted to the input shaft 14 via the speed increasing mechanism 17 and further transmitted to the rotating body 24 of the governor 22 via the one-way clutch 21. The closing speed of the opening / closing sheet 8 is adjusted to be constant by the action of the governor 22. Thereafter, when one stopper 44 comes into contact with the lower limit positioning plate 46 by the position adjusting means 41, the closing movement of the opening and closing sheet 8 is stopped. Accordingly, the entrance / exit 9 is closed by the opening / closing sheet 8 and functions as a fire prevention section.

  If necessary, when the manual hoisting wheel 20 is rotated together with the input shaft 14 by pulling the operation cord 20a downward, the rotation of the input shaft 14 is not transmitted to the rotating body 24 because the one-way clutch 21 is idle, and is opened and closed. It is transmitted to the shaft 3. Therefore, in combination with the elastic force of the torsion coil spring 7, the opening / closing sheet 8 is wound around the rotating drum 6 and the doorway 9 is opened. Instead of the manual hoist wheel 20, the handle shaft portion 14 a of the input shaft 14 may be rotated in the opening direction of the opening / closing seat 8. Although not shown, the brake 23 is set to the braking state P and the open position of the open / close seat 8 is held.

It is a partially notched front view which shows the whole doorway sheet opening / closing machine which concerns on this embodiment. It is the elements on larger scale of FIG. 1 which looked at the seat raising / lowering adjustment apparatus of the said entrance / exit seat opening / closing machine from the front side. It is the elements on larger scale which looked at the governor in the said seat raising / lowering adjustment apparatus from the side surface side. It is the elements on larger scale which looked at the switching means of the brake in the said seat raising / lowering adjustment apparatus from the side surface side. (A) is the partial expanded sectional view which looked at the braking state in the brake in the said seat raising / lowering adjustment apparatus from the side surface side, (b) is the partial expanded sectional view which similarly looked at the brake release state from the side surface side.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 3 ... Opening / closing axis | shaft, 7 ... Torsion coil spring (biasing means), 8 ... Opening / closing sheet, 9 ... Entrance / exit, 14 ... Input shaft, 17 ... Speed increasing mechanism, 14a ... Handle shaft part (drive means which is a manual operation part) , 20 ... Manual hoisting wheel 20 (driving means as a manual operation unit), 21 ... One-way clutch, 22 ... Governor, 23 ... Brake, 37 ... Switching means, 41 ... Position adjusting means, P ... Braking state, Q ... The brake is released.

Claims (4)

An opening / closing shaft that rotates when the opening / closing sheet opens the entrance / exit by the urging means and the opening / closing sheet closes the entrance / exit by its own weight, an input shaft that is linked to the opening / closing shaft, and a governor and brake that can be linked to the input shaft; A speed increasing mechanism for increasing the rotational speed of the input shaft than the rotational speed of the open / close shaft is interposed between the open / close shaft and the input shaft, and between the input shaft and the governor and the brake, An entrance / exit seat characterized by interposing a clutch that functions to prevent the rotation of the input shaft from being transmitted to the governor and the brake when the opening / closing seat is opened, while transmitting the rotation of the input shaft to the governor and the brake when the opening / closing seat is closed. Opening and closing machine. 2. The entrance / exit sheet opening / closing machine according to claim 1, further comprising a driving means for rotating the input shaft so as to open the opening / closing sheet. The entrance / exit seat opening / closing machine according to claim 1 or 2, further comprising switching means for switching the brake between a braking state and a braking release state. The entrance / exit sheet according to claim 1, further comprising position adjusting means for adjusting a closed position of the open / close sheet by preventing rotation of the open / close shaft when the open / close sheet is closed. Opening and closing machine.

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