JP2005075615A - Lift - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress that a loosened wire 31 rides over a flange part 25c and comes out of a drum 25 or the wire is entwined round the shaft 24b of a motor 24 and lifting operation becomes defective. <P>SOLUTION: A mounting plate 23 as a restriction body is installed between the motor 24 and the drum 25. The mounting plate 23 is formed in an approximately L-shape in cross section, and three projected parts 23a are formed on flange part outer peripheral side of the drum 25. By this, even if the projected wire 31 is present at the outer peripheral edge of the flange part 25c, the possibility of the insertion thereof between the mounting plate 23 and the drum 25 can be reduced by the projected parts 23a. Also, since the wire 31 loosened and tending to come out pressed into the flange part 25c of the drum 25 by the projected parts 23a, the the possibility of the wire 31 coming out of the drum 25 can be reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lifting device installed on a high ceiling.

  In a building with a high ceiling such as a gymnasium or a factory, an elevating device for elevating and lowering the lamp is provided by providing an electric motor in the illuminating device in order to facilitate maintenance such as lamp replacement and cleaning of equipment.

  The lifting device has a lifting device body installed on a ceiling or the like, and an electric motor and a drum for winding and feeding the wire by forward and reverse rotation driving of the motor are arranged in the lifting device body, and the wire fed from the drum is arranged. A lifting part equipped with electrical equipment is connected to the tip.

  Thus, there is a sag detecting means for automatically stopping the electric motor by detecting that the sag is generated in the wire fed from the drum when the elevating part reaches the floor surface or the like when the elevating part descends. However, in this state, slack may occur in a state where the wire protrudes outside the flange portion of the drum.

  From this state, when the drum is rotated in the winding direction to raise the elevating part, the wire may get caught by the hook part and get off the drum or the wire may get entangled with the motor. There was a risk that the wire would be cut and the elevator would fall.

  For this reason, in Patent Document 1, there is provided a regulating body having an opening portion that is perpendicular to the axial direction of the drum and into which a part of the circumferential circumference of the flange portion of the drum is inserted through a gap. A lifting device is disclosed.

Thus, in this lifting device, the lower end of the flange portion of the drum is inserted into the cutout portion of the mounting plate, and the distance between the outer peripheral edge of the flange portion and the edge of the cutout portion is narrower than the thickness of the wire. Therefore, the slack wire is regulated and guided to the take-up portion to prevent it from going over the collar and coming off the drum or entangled with the drive shaft of the electric motor, etc.
Japanese Patent No. 2661655

  However, in this lifting device, for example, when the slack detection means does not operate normally, the slack wire becomes large and the slack wire passes over the jaw part of the drum and further over the regulating body. There is a risk that the wire may break by being entangled with the shaft portion.

  Accordingly, the present invention provides an elevating device that reduces the entanglement of the wire over the jaws of the drum and entanglement with the shaft even when the sagging portion of the wire becomes large.

The lifting device according to the first aspect of the present invention is a lifting device main body; a drum housed inside the lifting device main body, and having a disc-shaped flange portion provided at both ends in the axial direction perpendicular to the axial direction; A motor for rotating the drum in the forward and reverse directions; a convexity arranged between the drum and the motor and positioned perpendicular to the axial direction of the drum and formed on the outer side of the circumference of the flange of the drum toward the drum side A regulation body having a section; a wire wound by a winding drum; and a lifting section suspended by the wire and moved up and down by rotation of the winding drum.

  In the present invention and the following inventions, the definitions and technical meanings of terms are as follows unless otherwise specified.

  The lifting device main body is fixed to a ceiling or the like, and includes a motor, a drum, and the like, and has a function of rotating the drum by an electric motor to raise and lower the lifting unit by winding and unwinding the wire. Moreover, a lighting device etc. can also be accommodated in the raising / lowering apparatus main body side.

  The wire only needs to be able to suspend the elevating part, and allows a shape such as a rope, a line, or a belt.

  The regulating body is provided between the drum and the motor, and a plurality of convex portions are provided around the jaw portion of the drum on a plate-like regulating plate larger than the jaw portion of the drum. When the wire sags, the convex part is preferably provided mainly on the lower side of the drum because it sags on the lower side of the drum due to gravity. Furthermore, it is preferable that the height of the convex portion is at least half the thickness of the jaw portion of the drum, and that the convex portion has no corners so that the wire does not get entangled with the convex portion. Is preferred.

  Further, the restricting body may be configured to cover the periphery of the drum, and the inner wall of the instrument main body may be used instead of the restricting body. With this configuration, the wire does not jump out from the periphery of the drum, and the possibility of the wire becoming entangled with the shaft of the motor is further reduced.

  According to the present invention, the slack wire goes over the collar and comes off the drum, or the lifting operation failure occurs due to entanglement with the motor shuff or the like. The wire is entangled with the motor shaft and the wire breaks. Suppresses falling.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of the lifting device, in which 21 is a square box-shaped device body, to which a U-shaped installation stay 22 is connected so as to straddle the device body 21. The apparatus main body 21 is connected to an elevating apparatus installation member (not shown) provided, for example, at a ceiling-side height of a gymnasium through the installation stay 22.

  In the apparatus main body 21, a motor 24 with a reduction gear box 24 a capable of forward / reverse rotation is disposed, and a drum 25 that is rotated forward and backward by the motor 24 is provided. The drum 24 includes a drum portion 25b that winds a wire around a fitting surface of a fitting hole 25a into which the shaft 24b of the motor 24 can be fitted, and a disk provided substantially perpendicular to the axial direction at both axial ends of the drum portion 25b. It is comprised from the upper jaw part 25c.

  Further, a mounting plate 23 as a regulating body is mounted between the motor 24 and the drum 25. The mounting plate 23 is formed in a substantially L-shaped cross section, and an insertion port 23b through which the shaft 24b of the motor 24 can be inserted is provided on one surface. It has a substantially central portion, and three convex portions 23a are provided on the outer side of the periphery of the jaw portion of the drum 25 so as to face the drum. In addition, a screw hole 23c that can be fixed to the lifting device main body 21 is formed on the other surface.

  At this time, the mounting plate is configured to be larger than the jaw portion 25c of the drum and has a shape along the inner surface of the lifting device main body 21 so that the gap between the interior of the lifting device main body 21 and the mounting plate 23 is reduced. When slack, there is no risk of entanglement with the shaft 24b of the motor 24 beyond the mounting plate, which is preferable.

  A first pulley 26 is mounted in a horizontal posture on the side of the apparatus main body 21 facing the drum 25. An elevator holder 27 is disposed between the drum 25 and the first pulley 26, for example, at the center of the apparatus main body 21 and facing the lower surface opening of the main body 21. The holder 27 has guide walls 27a for swinging the lifting body at four corners, and lock claws 28 are respectively attached between the guide walls 27a. These lock claws 28 are urged by a spring (not shown) and are provided so as to be rotatable in a vertical direction within a predetermined angle range.

  A second pulley 29 is disposed at the center of the apparatus main body 21 located outside the elevator holder 27. The pulley 29 is mounted upright on a pulley holder 30 fixed to the apparatus main body 21. The height position of the second pulley 29 is set to a height at which the upper end of the groove substantially coincides with the height of the groove of the first pulley 26.

  The feeding portion of the wire 31 that passes through the second pulley 29 holds a lifting body 32. This suspension is realized via a pair of guide rollers (not shown) built in the same height position in the lifting body 32, and the tip 31a of the wire 31 drawn from the lifting body 32 is a device body. 21 is fixed.

  The lifting body 32 is connected to and supported by an object to be lifted, for example, a lighting fixture 33 on the lower side thereof. For this reason, the lower body portion of the lifting body 32 is for an appliance for making electrical connection with the lighting fixture 33. A plurality of terminals (not shown) are provided, and a plurality of power receiving terminals (not shown) are also provided on the upper surface.

  A slack detection device 35 as a slack detection means is disposed in the apparatus main body 21 between the first pulley 26 and the second pulley 29. The slack detecting device 35 is composed of a base 36 and a micro switch 37. When the wire 31 is slack and the tension of the wire 31 disappears, the micro switch 37 operates. When the microswitch 37 is operated, the motor is stopped. That is, by the slack detection by the slack detection device 35 as described above, the operation of the motor 24 of the drive unit 23 can be automatically stopped immediately after the lighting fixture 33 reaches the floor surface.

Next, the operation of the above embodiment will be described.
First, when the elevating body 32 is lowered, the drum 25 is rotated in the pulling-out direction of the wire 31 by driving the motor 24, and the wire 31 is drawn from the drum 25 and the elevating body 32 is lowered.
Then, the lifting body 32 or the lighting fixture 33 connected to the lifting body 32 gets down on the floor or the like, or the lifting body 32 or the lighting fixture 33 is placed on or caught on an obstacle or the like while being lowered. When sagging occurs, the slack detecting device 35 detects it and stops driving the motor 24.

  On the other hand, in order to raise the elevating body 32 from this lowered state, the wire 31 is wound around the drum 25 by the reverse rotation driving of the motor 24, so that the elevating body 32 is raised and the lighting device 33 is moved to a fixed position by the position detecting means. When it is detected that the motor has been reached, the drive of the motor 24 is stopped.

  However, even if a slack is detected in the slack detecting device 35 and the lifting body 32 or the lighting fixture 33 reaches the floor surface and slack occurs in the wire 31 fed from the drum 25, the slack cannot be detected and the motor is not detected. Cannot be stopped, and the wire 31 may come out of the jaw 25c of the drum 25.

  However, in this embodiment, since the convex portions 23a are provided at regular intervals at the lower end of the flange portion 25c of the drum 25, even if there is a wire 31 protruding to the outer peripheral edge of the flange portion 25c, the convex plate 23a causes the mounting plate. Insertion between the drum 23 and the drum 25 can be reduced. Further, since the wire 31 that is about to sag and jump out by the convex portion 23a is pushed inward from the jaw 25c of the drum 25, it is possible to reduce the occurrence of the wire 31 jumping out of the drum itself. For this reason, it is possible to prevent the slack wire 31 from being restricted and guided, overcoming the flange portion 25c, coming off the drum 25, or being entangled with the shaft 24b of the motor 24, etc.

  Further, in order to attach the drum 25 and the mounting plate 23 to the motor 24, the convex portion 23a is provided on the mounting plate 23 and is mounted along the convex portion around the flange portion 17, so that positioning is easy and mounting workability or Maintenance and inspection can be improved.

It is sectional drawing of the raising / lowering apparatus of this invention. It is a side view of a drum and a mounting plate same as the above. It is a perspective view which shows the attachment state of a drum, an attachment plate, and a motor same as the above.

Explanation of symbols

      21 ... Lifting device body 24 ... Motor 23 ... Mounting plate 23a ... Convex part 25 ... Drum 25c ... Jaw part

Claims (1)

Elevating device body;
A drum which is housed inside the elevating device body and has disk-like flanges provided at both ends in the axial direction perpendicular to the axial direction;
A motor for rotating the drum forward and reverse;
A regulating body that is disposed between the drum and the motor and has a convex portion that is positioned perpendicular to the axial direction of the drum and that is formed toward the drum side outside the circumference of the flange portion of the drum;
A wire wound by a winding drum;
An elevating part suspended by a wire and raised and lowered by rotation of the winding drum;
A lifting device characterized by comprising:

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