JP2010242313A - Apparatus for opening/closing sluice gate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for opening/closing a sluice gate, which makes a descent speed of a door body proper during the self-weight descent of the door body, without increasing costs. <P>SOLUTION: This apparatus for opening/closing the sluice gate includes: a rotating shaft 2 which rotates along with the self-weight descent of the door body for opening/closing the sluice gate; a differential gear device 3 which is connected to the rotating shaft 2; high speed-side and low speed-side rotating shafts 17 and 14 which are elongated in two directions from the differential gear device 3, and which are different in speed reduction ratio with respect to rotational output from the rotating shaft 2; centrifugal brakes 4a and 4b which are connected to the high speed-side and low speed-side rotating shafts 17 and 14, respectively; and electromagnetic brakes 5a and 5b which are connected to the high speed-side and low speed-side rotating shafts 17 and 14 elongated from the differential gear device 3, and which are switched so that the rotational output from the rotating shaft 2 can be transmitted to the low speed-side rotating shaft 14 of the differential gear device 3 from the high-speed side rotating shaft 17 thereof. Thus, the descent speed during the self-weight descent of the door body can be set proper without the increase of the cost. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sluice gate opening and closing device that optimizes a descending speed when a door body that opens and closes a sluice is lowered by its own weight.

In the conventional sluice opening and closing device, when the door body descends due to its own weight, the descent speed is kept constant by adopting a reduction ratio of one system with respect to the rotating shaft.
However, with this conventional method, since the descent speed is constant, if the descent speed is set fast to shorten the closing time, the door body may be damaged when it reaches the floor surface, while the door body is damaged. If the descent speed is set to be slow, the closing time (descent time) becomes longer, which is not preferable.

  As a method for varying the descending speed to counter such problems, hydraulic braking using a hydraulic pump is employed for the rotational output of the rotating shaft, but this increases costs such as maintenance costs such as oil replacement. In addition, there are concerns about problems such as oil leakage.

  In addition, there are methods for shortening the closing time of the door body, such as a method of giving a speed conversion function by a pole change motor to increase the speed only during the closing operation, a method of switching from own weight descent to motor operation, etc. However, there is a possibility that speed conversion cannot be performed because there is no AC power supply at the time of power failure.

  In Patent Document 1, a centrifugal brake is connected to the driven shaft to adjust the descending speed when the door body is lowered by its own weight. As a result, the door body is lowered by its own weight even when there is no power at the time of power failure. However, there is disclosed a sluice gate opening and closing device that is adjusted by a centrifugal brake so that the lowering speed of the door body is equal to or lower than a predetermined speed when descending.

JP 2005-146522 A

In the conventional method described above, a complicated structure is required to vary the descent speed of the door body, which causes an increase in cost and cannot be actively employed.
Furthermore, the sluice gate opening and closing device of Patent Document 1 is provided with a centrifugal brake, and is configured such that the lowering speed of the door body is equal to or lower than a constant speed. Cannot solve the problem.

  This invention is made in view of this point, and it aims at providing the sluice gate opening-and-closing apparatus which optimizes the descent | fall speed | rate at the time of a self-weight fall of a door body, without raising a cost significantly. To do.

As a means for solving the above-mentioned problems, the present invention is characterized in that the invention described in claim 1 is a rotating shaft that rotates as the weight of the door body that opens and closes the sluice is lowered, and a differential coupled to the rotating shaft. At least one of the gear unit, the output unit extending in two directions from the differential gear unit, the braking means coupled to each of the output units, and the output unit extending from the differential gear unit And an output switching means for switching so that the rotational output from the rotary shaft is transmitted from one to the other or both of the output portions of the differential gear device. .
According to the first aspect of the present invention, when the door body is at a high position from the floor surface, the output switching means transmits the rotation output from the rotation shaft to one output section, and the rotation of the output section is braked. Although the door body is lowered at a high speed after that, when the door body approaches the floor surface, the rotation output from the rotating shaft is transferred from one output section to the other output section or both by the output switching means. It switches so that it may be transmitted to an output part, it brakes with the braking means of rotation of this output part, and a door body is made to reach a floor surface at low speed.
As a result, when the door body is at a high position from the floor surface, the descent speed can be lowered to a certain high speed, and when approaching the floor surface, it can reach the floor surface while being lowered at a low speed. The time can be shortened, and the door body can safely reach the floor surface.
In addition, in the form in which the rotation output from the rotation shaft is switched from one output unit to the other output unit by the output switching unit according to the height of the door body from the ground, the output extending in two directions from the differential gear device. It is preferable to configure the part so that the reduction ratio with respect to the rotational output from the rotating shaft is different. On the other hand, in a form in which the rotation output from the rotation shaft is switched from one output unit to both output units including the other output unit by the output switching unit according to the height of the door body from the ground, the differential gear device The output section extending in two directions from the rotation axis may be configured such that the reduction ratio with respect to the rotation output from the rotation shaft is substantially the same.

According to a second aspect of the present invention, in the first aspect of the present invention, each of the output units has a reduction ratio with respect to a rotational output from the rotating shaft, and the output switching means is the differential gear device. Among the output portions extending from the rotary shaft, the output portion is connected only to an output portion having a large reduction ratio with respect to the rotational output from the rotary shaft.
According to the invention of claim 2, when the door body is at a high position from the floor surface, the output switching means is provided so that the differential gear device outputs the reduction ratio with respect to the rotational output from the rotating shaft in two systems. While the rotation output from the rotating shaft is transmitted to one output portion having a small reduction ratio and the rotation of the output portion is braked by the braking means, the door body is lowered at a high speed, and then the door body is lowered to the floor surface. At the time of approaching, the output switching means switches the rotation output from the rotating shaft so that it is transmitted from one output unit with a small reduction ratio to both output units including the other output unit with a large reduction ratio, The door is made to reach the floor surface at a low speed by being braked by the rotation braking means of each output section. In the case of this form, when the door body approaches the floor surface, the output switching means includes the rotation output from the rotating shaft from one output unit having a small reduction ratio to the other output unit having a large reduction ratio. Since switching is performed so as to be transmitted to both output units, braking is applied by the braking means to the rotation of the two output units when the door body approaches the floor surface.

The invention described in claim 3 is the invention described in claim 1 or 2, wherein the braking means is a centrifugal brake and the output switching means is an electromagnetic brake.
According to the third aspect of the present invention, the rotation output from the rotation shaft is allowed or restricted by the electromagnetic brake so that the rotation output from the rotation shaft is transmitted to each output portion of the differential gear device. It switches so that it may be transmitted to any one or both of two output parts, and the rotational output of each output part of a differential gear apparatus is braked with a centrifugal brake.

  According to the sluice gate opening and closing device of the present invention, when the door body falls by its own weight without adopting a complicated structure, the descent speed can be optimized according to the height of the door body from the floor surface. Therefore, the door body can safely reach the floor surface while reducing the descent time.

FIG. 1 is a cross-sectional view showing a sluice gate opening and closing device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a sluice gate opening / closing device according to a second embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS. 1 and 2.
The sluice gate opening and closing device according to the embodiment of the present invention optimizes the descent speed when the door body for opening and closing the sluice is lowered by its own weight corresponding to the height from the floor surface of the door body. The door body can safely reach the floor surface while shortening the descent time.

First, the sluice gate opening and closing device 1a according to the first embodiment of the present invention will be described with reference to FIG.
FIG. 1 shows a main part for optimizing the descending speed when the door body is lowered by its own weight in accordance with the height of the door body from the floor surface. For this reason, illustration of a door body is omitted.
As shown in FIG. 1, in the sluice gate opening and closing device 1a according to the first embodiment, a differential gear device 3 is connected to a rotating shaft 2 that rotates when the door body descends its own weight. That is, the main shaft side gear 9 fixed to the main shaft 8 meshes with the rotary shaft side gear 7 fixed to the rotary shaft 2. A plurality of differential gear shafts 10 are fixed to the main shaft 8 through bosses so as to be orthogonal to the main shaft 8. A differential gear 11 is pivotally supported on these differential gear shafts 10 via bearings. An intermediate gear 12 is pivotally supported on the main shaft 8 via a bearing, and the intermediate gear 12 and the differential gear 11 are engaged with each other. A first low-speed side gear 13 is bolted to the intermediate gear 12, and a second low-speed side gear 15 that is pivotally supported by the low-speed side rotating shaft 14 (output unit) is engaged with the first low-speed side gear 13. The differential gear 11 is meshed with a high speed side gear 18 that is pivotally supported by a high speed side rotation shaft 17 (output unit).
In the present embodiment, the reduction ratios of the low-speed side rotary shaft 14 and the high-speed side rotary shaft 17 extending in two directions from the differential gear device 3 with respect to the rotational output of the rotary shaft 2 are different, and the low speed side extending downward in the figure. The reduction ratio of the side rotation shaft 14 is set to be larger than the reduction ratio of the high speed side rotation shaft 17 extending rightward in the drawing.

In addition, a centrifugal brake 4 a serving as a braking unit is connected to the high-speed rotation shaft 17 extending from the differential gear device 3.
The centrifugal brake 4a is configured as follows. That is, the shaft 20 is fixed in a direction orthogonal to the centrifugal brake side main shaft 17 a connected to the high speed side rotating shaft 17. Brake blocks 22 and 22 are fixed to both ends of the shaft 20 so as to contact the inner peripheral surface of the housing 21. Each brake block 22, 22 receives centrifugal force due to rotation of the centrifugal brake side main shaft 17 a (high speed side rotation shaft 17), and brakes rotation of the high speed side rotation shaft 17 by frictional force with the inner wall surface of the housing 21. To do.

Further, an electromagnetic brake 5a, which is an output switching means, is connected to the high-speed rotation shaft 17 extending from the differential gear device 3 on the tip side of the centrifugal brake 4a.
The electromagnetic brake 5a is configured as follows. That is, the brake disc 25 is spline-engaged with the tip of the electromagnetic brake side main shaft 17b connected to the high speed side rotating shaft 17 via the centrifugal brake side main shaft 17a. The brake disk 25 is disposed between the armature 26 (movable iron piece forming a magnetic circuit) and the plate 27. Then, the brake disc 25 is pressure-bonded to the plate 27 via the armature 26 by the coil spring 28 to restrict the rotation of the electromagnetic brake side main shaft 17b (high speed side rotating shaft 17). On the other hand, when the coil 30 is energized from the outside, the armature 26 is attracted to the field 29 side, so that the restraint of the brake disk 25 is released, and the electromagnetic brake side main shaft 17b (high speed side rotating shaft 17) rotates. Permissible.
Further, a centrifugal brake 4b and an electromagnetic brake 5b equivalent to the centrifugal brake 4a and the electromagnetic brake 5a described above are also connected to the low-speed rotating shaft 14 extending from the differential gear device 3, so that the following explanation is easy. The signs are different.

The operation of the sluice opening and closing device 1a according to the first embodiment described above, particularly the operation when the door body is lowered by its own weight will be described.
First, the electromagnetic brake 5b connected to the low-speed rotation shaft 14 is not energized, and the state where the rotation of the low-speed rotation shaft 14 is restricted is maintained. On the other hand, the electromagnetic brake 5a connected to the high speed side rotary shaft 17 is energized to allow the high speed side rotary shaft 17 to rotate.
When the weight of the door body is lowered in this state, the rotational output from the rotary shaft 2 is transmitted to the high speed side rotary shaft 17 through the differential gear device 3 at a predetermined reduction ratio, so that the high speed side rotary shaft 17 Although the rotational torque is reduced and the descending speed of the door body is slowed by the braking of the centrifugal brake 4a, it is still lowered at a high speed.

Next, when the door body approaches the floor surface, the electromagnetic brake 4a on the low-speed side rotary shaft 14 side is energized to release the rotation restriction on the low-speed side rotary shaft 14 and the electromagnetic wave on the high-speed side rotary shaft 17 side. The energization to the brake 5a is released, and the rotation of the high speed side rotating shaft 17 is restricted.
By this operation, the rotation output from the rotating shaft 2 is switched from the high speed side rotating shaft 17 to the low speed side rotating shaft 14 via the differential gear device 3 and transmitted. As a result, the rotational output is transmitted to the low-speed rotating shaft 14 through the differential gear device 3 at a predetermined reduction ratio, and the rotational torque of the low-speed rotating shaft 14 is lower than the rotational torque of the high-speed rotating shaft 17. Thus, the rotational output of the low-speed side rotating shaft 14 is braked by the centrifugal brake 4b, so that the lowering speed of the door body is further reduced and reaches the floor surface at a low speed.

Next, a sluice gate opening / closing device 1b according to a second embodiment of the present invention will be described with reference to FIG.
When the sluice opening / closing device 1b according to the second embodiment is described, only differences from the sluice opening / closing device 1a according to the first embodiment will be described.
As shown in FIG. 2, in the sluice opening and closing device 1 b according to the second embodiment, two second low speed side gears are connected to the first low speed side gear 13 bolted to the intermediate gear 12 in the differential gear device 3. 15 and 15 mesh with each other, and the second low-speed gears 15 and 15 are respectively supported by the low-speed rotation shafts 14 and 14.
The above-described centrifugal brake 4b is connected to one (downward in FIG. 2) and the above-described centrifugal brake 4b is connected to the other (upward in FIG. 2) low-speed rotation shaft 14. Are concatenated.
In the sluice gate opening / closing device 1a according to the first embodiment, the electromagnetic brake 5a is connected to the high-speed rotation shaft 17, but the high-speed rotation shaft of the sluice opening / closing device 1b according to the second embodiment. 17, the electromagnetic brake 5a is not connected, and only the centrifugal brake 4a is connected.

When the weight of the door body is lowered by the sluice opening and closing device 1b according to the second embodiment, first, the electromagnetic brake 5b connected to the other (the upper side in FIG. 2) low-speed rotating shaft 14 is energized. Without performing, the state where rotation of the other low-speed side rotating shaft 14 is regulated is maintained. As a result, the rotation of one (downward in FIG. 2) of the low-speed rotation shaft 14 is also restricted.
When the weight of the door body is lowered in this state, the rotational output from the rotary shaft 2 is transmitted to the high speed side rotary shaft 17 through the differential gear device 3 at a predetermined reduction ratio, so that the high speed side rotary shaft 17 Although the rotational torque is reduced and the descending speed of the door body is slowed by the braking of the centrifugal brake 4a, it is still lowered at a high speed.

Next, when the door body approaches the floor surface, the electromagnetic brake 5b on the other low-speed rotation shaft 14 side is energized to release the rotation restriction on the other low-speed rotation shaft 14 and on the one low-speed side. The rotation restriction of the rotating shaft 14 is also released.
By this operation, the rotation output from the rotating shaft 2 is switched from the high speed side rotating shaft 17 to both the high speed side rotating shaft 17 and the low speed side rotating shaft 14 via the differential gear device 3 and transmitted. As a result, the rotation output is transmitted to both the high-speed side rotary shaft 17 and the low-speed side rotary shaft 14 through the differential gear device 3 at a predetermined reduction ratio, and the high-speed side rotary shaft 17 and the low-speed side rotary shaft 14 are respectively transmitted. By braking the respective rotational outputs by the centrifugal brakes 4a and 4b, the descending speed of the door body is further decreased and reaches the floor surface at a low speed.
In the sluice gate opening / closing device 1b according to the second embodiment, the high-speed rotation shaft 17 and the low-speed rotation shaft 14 extending from the differential gear device 3 have different reduction ratios with respect to the rotation output from the rotation shaft 2. Although set (reduction ratio is 2 systems), it may be set so that it is substantially the same (reduction ratio is 1 system).

As described above, in the sluice gate opening / closing device 1a, 1b according to the embodiment of the present invention, when the door body that falls under its own weight is at a high position from the floor surface, the rotary shaft 2 is operated by the operation of the electromagnetic brakes 5a, 5b. Is transmitted to the high-speed rotating shaft 17 having a small reduction ratio with respect to the rotational output, and the door body is lowered at a certain high speed although the descending speed is slowed by the braking of the centrifugal brake 4a. Thereafter, when the door body approaches the floor surface, the rotation output from the rotary shaft 2 is changed from the high-speed side rotary shaft 17 to the low-speed side rotary shaft 14 (first embodiment) by the operation of the electromagnetic brakes 5a and 5b. Or, switching to both the high-speed side rotary shaft 17 and the low-speed side rotary shaft 14 (second embodiment), centrifugal brakes 4a and 4b (centrifugal brake 4b in the first embodiment, centrifugal in the second embodiment) Due to the braking of the brakes 4a and 4b), the descending speed is further reduced and reaches the floor surface at a low speed.
As a result, the door body is safely lowered to the floor while shortening the door descent time by optimizing the descent speed when the door body is lowered by its own weight, corresponding to the height of the door body from the floor surface. Can reach the surface.

Moreover, compared with the braking method by the conventional hydraulic pump, the sluice gate opening / closing apparatus 1a, 1b which concerns on embodiment of this invention can also suppress replacement parts, such as oil, and can suppress a cost increase. Moreover, there is no need to worry about oil leakage.
Furthermore, in the sluice gate opening / closing device 1a, 1b according to the embodiment of the present invention, since the power source can be operated only by a DC power source, no power source (AC power source or the like) is required, and an emergency power source can be used. Remote operation in time is possible.

  DESCRIPTION OF SYMBOLS 1a, 1b Sluice gate opening and closing device, 2 Rotating shaft, 3 Differential gear device, 4a, 4b Centrifugal brake (braking means), 5a, 5b Electromagnetic brake (output switching means), 11 Differential gear, 14 Low speed side rotating shaft (output) Part), 17 High-speed rotation shaft (output part)

Claims (3)

A rotating shaft that rotates as the weight of the door that opens and closes the sluice,
A differential gear device coupled to the rotating shaft;
An output portion extending in two directions from the differential gear device;
Braking means coupled to each of the output parts;
It is connected to at least one output part among the output parts extending from the differential gear device, and the rotational output from the rotating shaft is transmitted from one to the other or both of the output parts of the differential gear device. Output switching means for switching to,
A sluice gate opening and closing device characterized by comprising: The output units have different reduction ratios with respect to the rotational output from the rotary shaft, and the output switching means decelerates the rotational output from the rotary shaft among the output units extending from the differential gear device. 2. The sluice gate opening and closing device according to claim 1, wherein the sluice gate opening and closing device is connected only to an output section having a large ratio.   The sluice gate opening and closing device according to claim 1 or 2, wherein the braking means is a centrifugal brake, and the output switching means is an electromagnetic brake.

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