JP4284682B2 - Chain looseness detection device for sluice switch - Google Patents

Description

  The present invention relates to a sluice gate opening / closing device provided to open and close a sluice gate, and more particularly to a chain looseness detection device for a sluice gate opening / closing device that stops an electric motor when an abnormality occurs when the door body is lowered. Is.

  A sluice is installed in the waterway leading to the river, and the sluice is opened and closed by raising and lowering the door body of the sluice gate opening and closing device. As a conventional sluice gate opening and closing device, for example, Patent Document 1 discloses a door body, a structural frame-shaped peer that holds the door body so as to be movable up and down, a drive device installed on the peer, There is disclosed a chain-driven sluice comprising a chain that is wound around a sprocket of the apparatus and that supports the door body so as to drive the door body up and down via the chain.

Japanese Patent Laid-Open No. 9-31949

However, in the sluice disclosed in Patent Document 1, when the door body is raised, if an obstacle interferes with the rising door body and cannot be raised normally, an overload continues to act on the drive device, and the drive device Or the transmission mechanism may be damaged.
On the other hand, when the door body is lowered, there is a possibility that the chain between the sprocket and the door body may become loose when an obstacle interferes with the descending door body and cannot be lowered normally.

  The present invention has been made in view of the above points, and particularly provides a chain looseness detection device for a sluice gate opening / closing device that detects an abnormality and stops the motor when an abnormality occurs in the lowering of the door body. For the purpose.

  According to the present invention, as means for solving the above-mentioned problem, the invention described in claim 1 is provided with an electric motor as a drive source for connecting a chain to an upper part of a door body that opens and closes a sluice and raising the door body. In the sluice gate opening and closing device that raises and lowers the door body together with the chain by the rotation of the sprocket to which the rotational driving force from the electric motor is transmitted through the transmission mechanism, a planetary gear mechanism is disposed in the transmission mechanism, A sun gear of the planetary gear mechanism is coupled to a drive shaft to which a rotational driving force from the electric motor is transmitted, and the driven shaft is coupled to a plurality of revolution gears of the planetary gear mechanism, and rotation from the drive shaft is performed. A driving force is transmitted to the driven shaft via the planetary gear mechanism, and a shaft portion protruding from the outer peripheral surface of the inner gear of the planetary gear mechanism, and an internal gear of the planetary gear mechanism of An urging mechanism for urging the shaft portion from at least one rotation direction side to restrict movement; and a position spaced apart from at least one rotation direction side of the shaft portion tip; A limit switch that stops the electric motor by contact with the shaft, and the biasing mechanism presses the limit switch via the shaft portion when only a load about the weight of the chain is applied to the driven shaft. Then, the looseness of the chain is detected.

  By configuring in this way, when an obstacle interferes with the descending door body and a load about the weight of the chain acts on the driven shaft, the torque acting on the driven shaft is reduced. Due to the urging force (repulsive force) of the mechanism, the tip of the shaft portion pushes the limit switch to stop the motor.

  In the invention described in claim 2, a chain is connected to an upper portion of a door body that opens and closes a sluice, and an electric motor is provided as a drive source for raising the door body, and a rotational driving force from the electric motor is provided with a transmission mechanism. In the sluice gate opening and closing device that lifts and lowers the door body together with the chain by the rotation of the sprocket transmitted via the differential gear mechanism is disposed in the transmission mechanism to transmit the rotational driving force from the electric motor An input-side bevel gear of the differential gear mechanism is connected to a drive shaft, the driven shaft is connected to an output-side bevel gear of the differential gear mechanism, and a rotational driving force from the drive shaft is applied to the differential gear mechanism. And a shaft portion projecting from a driven bevel gear interposed between the input-side bevel gear and the output-side bevel gear of the differential gear mechanism. And An urging mechanism for urging the shaft portion from at least one rotation direction side to restrict rotation of the driven bevel gear in both rotation directions of the shaft; and at least one rotation direction side of the shaft portion tip A limit switch that is disposed at a spaced position and stops the electric motor by contact with the shaft, and the urging mechanism acts on the driven shaft only with a load about the weight of the chain. The looseness of the chain is detected by pressing the limit switch through the shaft portion.

  By configuring in this way, when an obstacle interferes with the descending door body and a load about the weight of the chain acts on the driven shaft, the torque acting on the driven shaft is reduced. Due to the urging force (repulsive force) of the mechanism, the tip of the shaft portion pushes the limit switch to stop the motor.

  According to the chain looseness detecting device for a sluice opening and closing device of the present invention, when an abnormality occurs when the door body descends, the motor can be quickly stopped, so between the sprocket and the door body. It is possible to prevent the chain from loosening and is very effective.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS.
As shown in FIGS. 1 and 2, the sluice gate opening and closing device 1 includes a door body 2 for opening and closing the sluice, a chain 3 having one end connected to an upper portion of the door body 2, and a chain for raising and lowering the door body 2. 3 includes a driving device 4 that transmits a rotational driving force from the electric motor 13 and an abnormality detection means 15 that is disposed in a transmission mechanism in the driving unit 5 that constitutes the driving device 4.

As shown in FIG. 1, the sluice is provided with door bodies 2 for opening and closing the sluice gates, and one end of the chain 3 is connected to each of the upper ends of the door body 2 via the suspension fittings 11. It is fixed.
On both banks of the sluice gates, gate pillars 8 are erected, and an operation table 9 is stretched over the gate pillars 8. The driving device 4 is installed on the operation table 9. What is indicated by reference numeral 10 is a protective fence.
In addition, two rollers 2a are mounted on both ends of the door body 2 below the door body 2, and door stoppers 12 are provided on the gate pillars 8 on both sides, respectively. Rolls up and down smoothly to roll up and down.

The drive device 4 is connected to a drive unit 5 including an electric motor 13 that generates a rotational drive force, and a connecting shaft 7 extending from the drive unit 5 to the left and right, and the rotational drive force from the drive unit 5 is transmitted. Each driven part 6.
As shown in FIGS. 1 to 3, the drive unit 5 includes a drive shaft 16 to which the rotational drive force from the electric motor 13 is transmitted via a transmission mechanism, and the rotational drive force from the drive shaft 16 to the right and left coupling shafts. 7 and a drive shaft 17 that is transmitted to the drive shaft 17, and an abnormality detection means 15 that is disposed between the drive shaft 16 and the drive shaft 17.
Each driven portion 6 is provided with a sprocket (not shown) to which the rotational driving force from the connecting shaft 7 is transmitted. The chain 3 is wound around the sprocket, and the sprocket rotates to open the door together with the chain 3. The body 2 is raised and lowered.

The abnormality detection means 15 has an overload detection function and a chain slack detection function. As shown in FIGS. 2 and 3, the abnormality detection means 15 protrudes from the outer peripheral surface of the planetary gear mechanism 18 and the internal gear 21 of the planetary gear mechanism 18. And the urging mechanisms 22 and 23 for urging the intermediate portion of the shaft portion 28 from both sides in order to restrict the rotation of the internal gear 21 of the planetary gear mechanism 18, and the shaft portion 28. It is provided with a limit switch 29a for detecting overload and a limit switch 29b for detecting looseness, which are disposed at positions spaced apart on both ends in the rotational direction and stop the electric motor 13 by contact with the shaft portion 28. ing.
Further, the sun gear 19 of the planetary gear mechanism 18 is connected to the drive shaft 16, and the driven shaft 17 is connected to the plurality of revolution gears 20 of the planetary gear mechanism 18 via the connecting member 30, so that the door body 2 is connected. In the state where it is raised and lowered as usual, the rotational driving force from the drive shaft 16 input to the sun gear 19 is such that the rotation of the internal gear 21 is restricted by the urging mechanisms 22, 23. Is transmitted to the driven shaft 17 in place of the revolving motion.

Each of the urging mechanisms 22, 23 transmits coil springs 24, 25, a predetermined urging force of the coil springs 24, 25 to the shaft portion 28, and a shaft portion 26 whose tip abuts against a side surface of an intermediate portion of the shaft portion 28, 27.
The coil spring 24 disposed in one urging mechanism 22 is 100 when the door body 2 is lifted and a load that hinders the lift is applied to the door body 2, that is, the motor 13 has a driving capacity of 100. When a load of% to 150% is applied, the urging force is such that the end of the shaft portion 28 is compressed by the rotation of the internal gear 21 and can press the limit switch 29a for detecting overload. Furthermore, the coil spring 24 is set to 20% to 40% of the drive capacity of the motor 13 when the load that hinders the descent is applied to the door 2 when the door 2 is lowered. When only the own weight of the chain 3 is applied, the other urging mechanism 23 is compressed via the shaft 28 and the tip of the shaft 28 can press the limit switch 29b for detecting looseness. Composed There.
Thus, the biasing force of the coil spring 24 of one biasing mechanism 22 is set to be larger than the biasing force of the coil spring 25 of the other biasing mechanism 23.
Here, the drive capability of the electric motor 13 is mainly set to a drive capability for raising and lowering a load obtained by adding up the weight of the door body 2, the weight of the chain, the water pressure, and the like.

Next, the operation of the chain looseness detection device (including the overload detection function) of the sluice gate opening / closing device 1 according to the embodiment of the present invention will be described.
First, when the motor 13 rotates the sun gear 19 of the planetary gear mechanism 18 together with the drive shaft 16 in the direction of arrow C (clockwise direction) to raise the door body 2, an obstacle interferes with the rising door body 2. In this case, a large torque acts on the revolving gear 20 connected to the driven shaft 17 and revolves, so that a torque difference is generated between the sun gear 19 connected to the driving shaft 16 and the internal gear 21 is moved to the arrow B. The shaft portion 28 presses the coil spring 24 of one biasing mechanism 22 while the shaft portion 28 presses the coil spring 24 of one biasing mechanism 22, and the tip of the shaft portion 28 presses the limit switch 29 a for detecting overload, thereby stopping the electric motor 13.

  On the other hand, when the sun gear 19 of the planetary gear mechanism 18 together with the drive shaft 16 is rotated in the direction of arrow D (counterclockwise direction) by the electric motor 13 and the door body 2 is lowered, an obstacle interferes with the descending door body 2. When only a load about the weight of the chain 3 is applied to the driven shaft 17, the torque acting on the driven shaft 17 is reduced, and therefore the biasing force (repulsive force) of the coil spring 24 of one biasing mechanism 22 is reduced. The coil spring 25 of the other urging mechanism 23 is pressed through the shaft portion 28, and the tip of the shaft portion 28 pushes the looseness detection limit switch 29b to stop the electric motor 13.

  As described above, according to the chain looseness detecting device of the sluice opening and closing device 1 according to the embodiment of the present invention, the abnormality detecting means 15, that is, the planetary gear mechanism 18, and the planetary gear mechanism are included in the transmission mechanism of the drive unit 5. A shaft portion 28 protruding from the outer peripheral surface of the internal gear 21 of the gear mechanism 18 and an intermediate portion of the shaft portion 28 are urged from both rotational directions in order to restrict the rotation of the internal gear 21 of the planetary gear mechanism 18. A pair of limit switches 29a, 29b that are disposed at positions that are spaced apart from each other in the rotational direction of the tip of the shaft portion 28 and stop the electric motor 13 by contact with the shaft portion 28. Since the urging force of the coil spring 24 of one urging mechanism 22 is set larger than that of the coil spring 25 of the other urging mechanism 23, the door body 2 is moved when the door body 2 is raised and lowered. The load that hinders the lifting Case, it is the tip of the shaft portion 28 stops the electric motor 13 by pressing one of the pair of limit switches 29a, 29 b. Thereby, in particular, when an obstacle interferes with the door 2 when it is lowered and only a load of about the weight of the chain 3 acts on the driven shaft 17, the electric motor 13 can be quickly stopped, and the door 2 The chain 3 between the rocket and the sprocket is not loosened and is effective.

Next, another embodiment of the abnormality detection means 15 will be described with reference to FIG. 2 based on FIG.
As shown in FIGS. 2 and 4, the abnormality detecting means 31 is protruded from a differential gear mechanism 32 and a driven bevel gear 35 between the input side bevel gear 33 and the output side bevel gear 34 of the differential gear mechanism 32. In order to restrict the rotation of the driven bevel gear 35 in both rotation directions of the shaft portion 28 and the drive shaft 16, the respective biasing mechanisms 22 and 23 that bias the intermediate portion of the shaft portion 28 from both rotation direction sides. And a pair of limit switches 29a and 29b for stopping the electric motor 13 by contact with the shaft portion 28 at positions spaced apart from each other in the rotational direction at the tip of the shaft portion 28. Further, the set values of the urging forces of the respective urging mechanisms 22 and 23 are substantially the same as the form of the abnormality detecting means 15, and therefore description thereof is omitted here.

  As shown in FIG. 4, the drive shaft 16 is connected to the input side bevel gear 33, and the driven shaft 17 is connected to the output side bevel gear 34, so that the door body 2 moves up and down as usual. The rotational driving force from the drive shaft 16 input to the input side bevel gear 33 is driven by the urging mechanisms 22 and 23 because the rotation of the driven bevel gear 35 in both rotational directions of the drive shaft 16 is restricted. It is transmitted to the output side bevel gear 34 and the driven shaft 17 via the bevel gear 35. Here, the rotation direction of the output side bevel gear 34 is opposite to the rotation direction of the input side bevel gear 33.

Next, the operation of the chain looseness detection device (including the overload detection function) of the sluice switch using the abnormality detection means 31 according to another embodiment will be described.
First, when the electric motor 13 rotates the input side bevel gear 33 together with the drive shaft 16 to raise the door body 2, if an obstacle interferes with the rising door body 2, the output connected to the driven shaft 17. Since a large torque acts on the side bevel gear 34 and a torque difference is generated between the side bevel gear 34 and the input side bevel gear 33 connected to the drive shaft 16, the driven bevel gear 35 is in a direction opposite to the rotation direction of the drive shaft 16. While rotating, the shaft 28 presses the coil spring 24 of one biasing mechanism 22, and the tip of the shaft 28 presses the limit switch 29 a for overload detection to stop the electric motor 13.

  On the other hand, when the electric motor 13 rotates the input side bevel gear 33 together with the drive shaft 16 to lower the door body 2, an obstacle interferes with the descending door body 2, and the driven shaft 17 only receives a load about the weight of the chain 3. When not acting, the torque acting on the driven shaft 17 decreases, and the other biasing mechanism 23 via the shaft portion 28 by the biasing force (repulsive force) of the coil spring 24 of one biasing mechanism 22. The coil spring 25 is pressed, and the tip of the shaft portion 28 pushes the limit switch 29b for detecting looseness to stop the electric motor 13.

  As described above, according to the chain looseness detection device for the sluice switch using the abnormality detection means 31 according to another embodiment, the differential gear mechanism 32 and the driven bevel gear 35 of the differential gear mechanism 32 are provided. The shaft 28 projecting from the shaft, the biasing mechanisms 22 and 23 for biasing the intermediate portion of the shaft 28 from both sides in order to restrict the rotation of the driven bevel gear 35, and the tip of the shaft 28. A pair of limit switches 29a and 29b are provided at positions that are spaced apart from each other in the rotational direction, and stop the electric motor 13 by contact with the shaft portion 28, and the coil spring 24 of one biasing mechanism 22 is provided. Since the urging force is set larger than the coil spring 25 of the other urging mechanism 23, when the door body 2 is lifted and lowered, a load that hinders its lifting and lowering acts on the door body 2. The tip of the portion 28 is a pair of limit switches. The electric motor 13 can be stopped by pressing switch 29a, any of 29b. Thereby, in particular, when an obstacle interferes with the door 2 when it is lowered and only a load of about the weight of the chain 3 acts on the driven shaft 17, the electric motor 13 can be quickly stopped, and the door 2 The chain 3 between the rocket and the sprocket is not loosened and is effective.

FIG. 1 is a front view of a sluice opening and closing device using an abnormality detection means according to an embodiment of the present invention. FIG. 2 is a front view showing the abnormality detecting means according to the embodiment of the present invention. FIG. 3 is a side view of the abnormality detection means of FIG. FIG. 4 is a side view showing another embodiment of the abnormality detecting means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opening / closing device for sluices 2 Door body 3 Chain 4 Drive device 5 Drive part 13 Electric motor 15, 31 Abnormality detection means 16 Drive shaft 17 Driven shaft 18 Planetary gear mechanism 19 Sun gear 20 Revolving gear 21 Internal gear 22, 23 Energizing mechanism 24, 25 Coil spring 28 Shaft 29a, 29b Limit switch 32 Differential gear mechanism 33 Input side bevel gear 34 Output side bevel gear 35 Driven bevel gear

Claims (2)

A chain is connected to the upper part of the door body that opens and closes the sluice, and an electric motor is provided as a drive source for raising the door body, and the chain is generated by the rotation of the sprocket to which the rotational driving force from the electric motor is transmitted through the transmission mechanism. And a sluice gate opening and closing device for raising and lowering the door body,
A planetary gear mechanism is disposed in the transmission mechanism, a sun gear of the planetary gear mechanism is coupled to a drive shaft to which a rotational driving force from the electric motor is transmitted, and a plurality of revolution gears of the planetary gear mechanism are The driven shaft is connected, and a rotational driving force from the driving shaft is transmitted to the driven shaft through the planetary gear mechanism, and projects from the outer peripheral surface of the inner gear of the planetary gear mechanism. A shaft portion provided, a biasing mechanism for biasing the shaft portion from at least one rotation direction side to restrict the rotation of the internal gear of the planetary gear mechanism, and at least one rotation of the tip of the shaft portion. A limit switch disposed at a position separated in the movement direction side and stopping the electric motor by contact with the shaft portion, and the urging mechanism acts on the driven shaft only with a load about the weight of the chain. If not, Detecting the slack of the chain by pressing the limit switch Te chain slack detecting device sluice opening-closing device according to claim. A chain is connected to the upper part of the door body that opens and closes the sluice, and an electric motor is provided as a drive source for raising the door body, and the chain is generated by the rotation of the sprocket to which the rotational driving force from the electric motor is transmitted through the transmission mechanism. And a sluice gate opening and closing device for raising and lowering the door body,
A differential gear mechanism is disposed in the transmission mechanism, and an input side bevel gear of the differential gear mechanism is coupled to a drive shaft to which a rotational driving force from the electric motor is transmitted, and an output of the differential gear mechanism The driven shaft is connected to a side bevel gear, and the rotational driving force from the drive shaft is transmitted to the driven shaft via the differential gear mechanism, and the input of the differential gear mechanism A shaft portion protruding from a driven bevel gear interposed between the side bevel gear and the output side bevel gear, and the shaft portion for restricting the rotation of the driven bevel gear in both directions of rotation of the drive shaft And an urging mechanism that urges the motor from at least one rotation direction side, and a position that is spaced apart from at least one rotation direction side of the tip of the shaft, and stops the electric motor by contact with the shaft. A limit switch, and the biasing device The sluice gate opening and closing device that detects the looseness of the chain by pressing the limit switch via the shaft portion when only a load about the weight of the chain is applied to the driven shaft. Chain looseness detection device.

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