JP2012219459A - Power transmission device for overhead door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission device capable of motorizing an overhead door even in a narrow space almost without the need of remodeling a manual type overhead door.SOLUTION: A power transmission device 20 includes: a connection part 21 connected to a hoist shaft 15 of a lifting device 14 of an overhead door 10; a drive input part 25 driven by an electric drive device 30; and locking means 27 capable of setting a locking position of the drive input part 25 in the connection part 21. Further, a support position of a rotary shaft 23 of the connection part 21 is set to be freely turnably supported by support means 36.

Description

  The present invention relates to a power transmission device used for opening and closing a door panel of an overhead door for opening and closing a doorway of a building.

  As an overhead door (so-called overhead door, etc.) that opens and closes a door panel to open and close a door (such as a warehouse, factory, house, and garage), for example, a wire connected to the lower part of the door panel is positioned above the door The door panel is lifted by wrapping it around a shaft (hereinafter simply referred to as “rolling shaft” or “shaft”), and the door is opened and closed by storing it in a flat space along the ceiling of the building. There is an overhead door (Patent Document 1).

  However, manually opening and closing the overhead doors has problems such as requiring labor and time to open and close, so in warehouses with many overhead doors, it is difficult to quickly open and close the logistics cost. Many problems such as increase occur.

  Therefore, an electric overhead door (so-called electric overhead door, etc.) that drives the winding shaft with a motor has been devised. This electric overhead door has an endless chain disposed in the vicinity of the ceiling, and this endless chain is driven by a motor that is also disposed in the vicinity of the ceiling to lift the door panel connected to the endless chain ( Patent Document 2). With such an electric overhead door, it is possible to save labor and speed in opening and closing even in a warehouse or the like having many overhead doors.

Japanese Utility Model Publication No. 07-026587 Japanese Patent Laid-Open No. 11-229728

  Labor saving and speeding up and down of opening and closing of the overhead door can be realized by replacing the manual overhead door with an electric overhead door. For this purpose, purchase of the electric overhead door, removal and disposal of the manual overhead door, and In addition to the burden of expenses for replacement work, problems such as restrictions on the use of warehouses during the construction period will arise.

  In view of this, it is conceivable to refurbish a conventional manual overhead door and attach an electric drive device (electrification). However, there is a problem in the space of devices and equipment for electric drive. For example, if the electric overhead door disclosed in Patent Document 2 is to be repaired, many parts including the hoisting shaft must be replaced or repaired. Refurbishment can be extremely difficult or even impossible due to inability to replace or lack of refurbishment space.

  Therefore, the present invention has an object to realize a power source of a power transmission device that requires almost no manual overhead door renovation and can transmit a driving force of a motor or the like to the overhead door even in a narrow space. Is.

  In addition, the present invention realizes a power transmission device for use with an overhead door having a configuration of a manual overhead door, so that the overhead door as a whole is an electric overhead door that is inexpensive and has few installation space restrictions. It is to be an issue.

  In order to solve the above problems, the power transmission device according to the present invention is, for example, in a warehouse where a plurality of manual overhead doors are installed close to each other, even when the interval between the overhead doors is narrow, It has the structure which can raise the freedom degree of installation by having the structure which sets the positional relationship with an electric drive device.

  Specifically, the power transmission device includes a connecting portion connected to a winding shaft of a lifting device for an overhead door, a drive input portion (for example, a pulley) driven by an electric drive device, and a drive input portion in the connecting portion. It has the latching means which can set the latching position of this, and it was set as the structure which transmits the driving force from an electric drive device to an overhead door. That is, the drive input unit is configured so that the locking position in the coupling unit is the drive output unit of the electric drive device (the drive output unit is for outputting driving force to the drive input unit of the power transmission device, such as a pulley). It can be set appropriately according to the position. Further, the power transmission device has a configuration in which the support position of the rotating shaft of the connecting portion is set and is rotatably supported by the support means, and the positional relationship between the power transmission device and the electric drive device is appropriately set. It can be done.

  The locking means is provided in the axial direction on the inner surface of the shaft hole of the drive input portion through which the rotary shaft is inserted and the first groove portion formed in the axial direction on the surface of the rotary shaft of the connecting portion. And a fixing key that is fitted between the first groove portion and the second groove portion to fix the position of the drive input portion with respect to the rotation shaft. The fixed key has a height on one end side lower than the total depth of both groove portions, and a height on the other end side higher than the total depth of both groove portions. Therefore, if the first groove portion of the rotating shaft inserted through the shaft hole of the drive input portion and the second groove portion of the drive input portion are positioned so as to face each other, and the fixing key is inserted into both groove portions, the drive input portion Can be locked at any position on the rotating shaft.

  Thus, in a warehouse or the like where a plurality of manual overhead doors are installed close to each other, even if the installation position is restricted due to the narrow interval between the overhead doors, the power transmission device has its drive input. By setting the locking position of the part, it is possible to receive power from the electric drive device, and to set the positional relationship between the power transmission device and the electric drive device.

  According to the power transmission device according to the present invention, the manual overhead door can be electrically driven even in a narrow space with little modification. Moreover, the power transmission device according to the present invention can be used together with an overhead door having a manual overhead door configuration, thereby realizing an electric overhead door with less installation space restrictions as a whole overhead door.

It is a figure which shows an example (schematic structure) of the overhead door driven by the power transmission device concerning this invention. It is a figure which shows schematic structure in one Embodiment of the power transmission device concerning this invention. It is a figure which shows the schematic side surface structure in the state which supported the power transmission device shown in FIG. 2 by the connection support means which an electric drive device has. It is a figure which shows the schematic planar structure of the drive part mount and support mount which the electric drive device shown in FIG. 3 has.

  Hereinafter, a power transmission device according to the present invention will be described with reference to the drawings. First, an example of an overhead door to be electrified will be described, and then the power transmission device will be described.

(Overhead door)
The overhead door 10 shown in FIG. 1 includes a door panel 11, a plurality of rollers 12 attached to both sides of the door panel 11, two guide rails 13 that guide the rollers 12 to regulate the lifting operation of the door panel 11, and the lifting and lowering. It has a device 14.

  The lifting device 14 is disposed above the door panel 11 and includes two shafts 15 having one end 15a connected to each other, a drum 16 attached to the other end 15b side of these shafts 15, and a wire wound up by the drum 16 17, a plurality of anchors fixed to a building wall or the like to rotatably support the two spring portions 18 mounted in the vicinity of one end 15a side of the two shafts 15 and the two shafts 15. A bracket 19 is provided. These anchor brackets 19 support the shafts 15 at one end 15a side, the other end 15b side, and a substantially central portion thereof. The other end 15 b of the shaft 15 is disposed above both side portions of the door panel 11, and a wire 17 connected to the lower end side of both side portions of the door panel 11 is wound up by the drum 16.

  A shaft 15 is inserted into the spring portion 18, one end 18 a is fixed to an anchor bracket 19 that supports the one end 15 a side of the shaft 15, and the other end 18 b is fixed to the shaft 15. Here, the spring portion 18 urges the shaft 15 to rotate in the direction in which the wire 17 is wound up by the drum 16. Therefore, when the shaft 15 is rotationally driven and the wire 17 is wound up by the drum 16, the biasing force of the spring portion 18 acts and the door panel 11 can be raised (pulled up) with a small driving force.

  The guide rail 13 is attached to the support column 1 at both sides of the entrance of the building and positioned vertically, and the upper portion of the guide rail 13 is substantially parallel to the ceiling of the building. It is designed to be stored in a part (near the ceiling). Of course, the overhead door driven by the power transmission device according to the present invention is not limited to the overhead door 10.

(Power transmission device)
The power transmission device 20 shown in FIG. 2 includes a connecting portion 21 connected to one end 15a of the hoisting shaft 15 of the lifting device 14 included in the overhead door 10 and a transmission pulley (drive input portion) 25 driven by the electric drive device 30. And a locking means 27 for setting a locking position of the transmission pulley 25 in the connecting portion 21.

  Here, the connecting portion 21 includes a flange 22 connected to one end 15 a of the shaft 15, a connecting rotary shaft 23 having the flange 22 on one end side thereof, and a substantially disc-shaped fastening member 24 for fastening the one end 15 a of the shaft 15 ( (Thickness T) (the total length in the axial direction of the flange 22 and the connecting rotary shaft 23 is L1). The flange 22 has a shaft hole 22b into which the one end 15a side of the shaft 15 is inserted from the flange surface 22a side, and a recess 22c drilled in the flange surface 22a coaxially with the shaft hole 22b.

  The fastening member 24 has a shaft hole 24a for inserting the shaft 15 and a convex portion 24b formed on one surface coaxially with the shaft hole 24a. The convex part 24 b of the fastening member 24 can be inserted into the concave part 22 c of the flange 22, and the inner peripheral surface of the shaft hole 22 b of the flange 22 is pushed in the axial direction by the convex part 24 b of the fastening member 24. Further, a fastening means for reducing the inner peripheral diameter is provided (not shown). Therefore, after one end 15a side of the shaft 15 is inserted into the shaft hole 24a of the fastening member 24 and further inserted into the shaft hole 22b of the flange 22, the fastening member 24 is fixed to the flange 22 with a bolt or the like (not shown). The fastening means disposed on the inner peripheral surface of the shaft hole 22 b of the flange 22 can tighten the entire peripheral surface on the one end 15 a side of the shaft 15 to connect the shaft 15 and the flange 22. At this time, the inner peripheral surface of the tightening means is reduced in diameter so that the center thereof does not move, and as a result, the respective center axes of the connecting rotary shaft 23 and the shaft 15 are accurately aligned. Yes.

  Of course, the connection part 21 should just be what can be connected with the shaft 15, and it may have a structure other than the above and can be connected with the shaft 15. For example, a configuration in which the one end 15a side of the shaft 15 inserted in the shaft hole 22b of the flange 22 is fastened at three locations in the cross-sectional direction with bolts or the like.

(Locking means)
As shown in FIG. 2, the locking means 27 includes a first groove 23 u that is drilled in the axial direction on the surface of the connecting rotary shaft 23 of the connecting portion 21 (the first groove 23 u extends over substantially the entire length of the connecting rotary shaft 23. The second groove 25u is formed in the axial direction on the inner peripheral surface of the shaft hole of the transmission pulley 25, and the first groove 23u and the second groove 25u are fitted and rotated. A fixing key 26 for fixing the position of the transmission pulley 25 with respect to the shaft 23 is provided.

  Here, both the first groove 23u and the second groove 25u have the same width and depth. The width of the fixed key 26 is slightly narrower than the width of the first groove portion 23u and the second groove portion 25u, and the height of the one end 26a is the sum of the depths of the first groove portion 23u and the second groove portion 25u. The other end 26b is slightly higher than the total depth of the first groove portion 23u and the second groove portion 25u. Therefore, after positioning the transmission pulley 25 at an arbitrary position of the coupling rotary shaft 23, the transmission pulley 25 is in a state where the first groove 23u of the coupling rotary shaft 23 and the second groove 25u of the transmission pulley 25 are opposed to each other. The transmission pulley 25 can be locked at an arbitrary position of the connecting rotary shaft 23 by inserting the fixed key 26 into both grooves between the connecting rotary shaft 23 and the connecting rotary shaft 23.

(Electric drive)
Next, in order to understand the power transmission device according to the present invention, an example of an electric drive device used together with the power transmission device 20 will be described.

  The electric drive device 30 shown in FIG. 3 is attached to a drive unit mount 31, a motor 32 attached to the drive unit mount 31, a speed reduction unit 33 also attached to the drive unit mount 31, and an output shaft 33 a of the speed reduction unit 33. And an output pulley (drive output unit) 34 for transmitting power to the transmission pulley 25 of the power transmission device 20. The speed reducer 33 is, for example, a worm gear, and decelerates and transmits the driving force of the motor 32 to the output shaft 33a that intersects the rotating shaft 32a of the motor 32 at 90 degrees (in FIG. 3, 32x is the rotating shaft 32a of the motor 32). And 33x is the center line of the output shaft 33a of the speed reduction part 33).

  The electric drive device 30 is, for example, a combination of a motor 32 having a long shaft length and a small diameter and a speed reduction unit 33, and the motor 32 has a rotation shaft 32a and an output shaft 33a of the speed reduction unit 33 crossed at 90 degrees. 30 can be installed in a narrow space by shortening the length of the speed reduction portion 33 in the direction of the output shaft 33a (D1 in FIG. 3, hereinafter referred to as “the length of the electric drive device 30”). Those are preferred. The length D1 of the electric drive device 30 is preferably shorter than the total length L1 of the flange 22 and the connecting rotary shaft 23 in the axial direction. In the electric drive device 30, the tip of the output shaft 33a of the speed reduction portion 33 is positioned away from the drive portion mount 31 by D2 (hereinafter sometimes referred to as “the length D2 of the output shaft 33a”).

  Here, the transmission pulley 25 of the power transmission device 20 and the output pulley 34 of the electric drive device 30 are positioned so as to rotate on the same plane, and the output shaft 33a of the speed reduction unit 33 of the electric drive device 30 is the power transmission device. It is positioned so as to be parallel to the 20 connecting rotation shafts 23.

(Positional relationship between power transmission device and overhead door)
Next, in order to understand the power transmission device according to the present invention, an example of the positional relationship between the power transmission device 20 and the electric drive device 30 will be described.

  As shown in FIGS. 3 and 4, the power transmission device 20 is supported by power transmission device support means 36 included in the electric drive device 30. Specifically, the connecting rotary shaft 23 of the power transmission device 20 is rotatably supported by a bearing 38 attached to a support mount 37 included in the power transmission device support means 36 at an arbitrary position in the axial direction. Yes. The power transmission device support means 36 is attached to the wall of the building at the attachment side 37t (see FIG. 4) of the support mount 37.

  Here, as shown in FIG. 4, the support mount 37 has circular bearing mounting holes 37a, 37b and 37c for mounting the bearing 38 on an axis 37x orthogonal to the mounting side portion 37t ( The bearing mounting holes 37a to 37c are connected to each other, and a plurality of screw holes 37d for mounting the bearing 38 to the support mount 37 are formed in the vicinity thereof.

  Further, the support mount 37 has two connecting round holes 39 drilled in a direction parallel to the attachment side portion 37t (a direction perpendicular to the axis 37x). Two long connecting holes 35 having a longitudinal direction in a direction parallel to the rotation shaft 32a are provided. Here, the position of the two connecting round holes 39 is aligned with the longitudinal direction of the position of the two connecting long holes 35, and both the holes are fastened with bolts or the like, so that the support mount 37 and the drive unit mount 31 are integrated. can do.

  At this time, by setting the positional relationship between the support mount 37 and the drive unit mount 31 within the range in the longitudinal direction of the two coupling long holes 35 of the drive unit mount 31 (arrow A), the transmission pulley of the power transmission device 20 25 and the output pulley 34 of the electric drive device 30 can be set (a belt (not shown) is applied between the transmission pulley 25 and the output pulley 34).

  The electric drive device 30 having the above-described configuration is configured such that the bearing 38 is attached to any one of the bearing attachment holes 37a to 37c of the power transmission device support means 36 attached to the wall portion of the building, thereby transmitting power to the building wall portion. An arbitrary position of the connecting rotary shaft 23 can be rotatably supported by the bearing 38 while setting an interval between the device 20 and the connecting rotary shaft 23. At this time, it is desirable that the following two conditions are satisfied and the electric drive device 30 is installed in a region in the axial length direction of the power transmission device 20 below the power transmission device 20.

  First, the length L3 from the flange surface 22a of the flange 22 of the power transmission device 20 to the support mount 37 is a length obtained by subtracting the length D2 of the output shaft 33a from the length D1 of the electric drive device 30 (D1). -D2) is desirable (L3> (D1-D2) in FIG. 3). Then, in FIG. 3, the right end of the electric drive device 30 is located on the left side of the flange surface 22 a of the flange 22.

  Second, the sum of the length L3 from the flange surface 22a of the flange 22 of the power transmission device 20 to the support mount 37 and the length D2 of the output shaft 33a is the total length L1 of the flange 22 and the connecting rotary shaft 23. Is shorter (in FIG. 3, D2 + L3 <L1). Then, in FIG. 3, the left end of the electric drive device 30 is positioned on the right side of the front end of the connecting rotation shaft 23.

  By setting the position of the bearing 38 with respect to the connecting rotary shaft 23 in this way, the electric drive device 30 is installed in a region in the axial length direction of the power transmission device 20 below the power transmission device 20. Further, the locking position of the transmission pulley 25 of the power transmission device 20 with respect to the output pulley 34 of the electric drive device 30 (the flange surfaces 22a to L2 of the flange 22) can be determined.

As described above, the power transmission means 20 can appropriately set the support position of the power transmission device support means 36 that supports the connecting rotary shaft 23, and in addition, the transmission pulley 25 is provided on the electric drive device 30. The positional relationship with the output pulley 34 can be set as appropriate.
Therefore, even if the space in the side part side direction of the overhead door 10 is narrow, the power transmission means 20 can transmit the driving force from the electric drive device 30 that can be installed in the space to the overhead door.

  In addition, the power transmission device according to the present invention is not limited to the embodiment, and can be appropriately modified and implemented without changing the gist thereof. For example, the drive input unit and the drive output unit may be used as a gear and a chain may be provided between them. The power transmission device support means may be configured to be mechanically separated from the electric drive device.

  The power transmission device according to the present invention can be manufactured, sold, etc., for electrification of a manual overhead door, and can be used together with an overhead door having a configuration of a manual overhead door to limit the installation space of the overhead door as a whole. Therefore, it is an invention having economical value and industrial applicability because it can manufacture an electric overhead door with a small amount of power.

10 Overhead door 11 Door panel 14 Lifting device 15 Shaft (rolling shaft)
20 power transmission device 21 connection portion 23 connection rotation shaft 23u first groove portion 25 transmission pulley (drive input portion)
25u 2nd groove part 26 Fixed key 27 Locking means 30 Electric drive device 36 Support means (power transmission device support means)

Claims (3)

A power transmission device for transmitting a driving force of an electric drive device to the lifting device of an overhead door having a door panel and a lifting device for raising and lowering the door panel,
A connecting portion connected to a winding shaft of the lifting device;
A drive input unit driven by the electric drive device;
A locking means capable of setting a locking position of the drive input portion in the connecting portion, and further, a support position of the rotating shaft of the connecting portion can be set and supported rotatably by the supporting means. A power transmission device characterized by. The locking means is
A first groove portion drilled in the axial direction on the surface of the connecting rotation shaft of the connecting portion;
A second groove portion drilled in the axial direction on the inner peripheral surface of the shaft hole of the drive input portion through which the coupling rotation shaft is inserted;
A fixing key is provided between the first groove portion and the second groove portion to fix the locking position of the drive input portion with respect to the connecting rotation shaft. Item 4. The power transmission device according to Item 1. The power transmission device according to claim 1, wherein the power input unit is a pulley or a gear.

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