JPH11346910A - Curtain opening/closing device and actuator used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curtain opening/closing device whose structure is simple and installation work is easy, and in which an opening/closing operation can be done relatively high-speedily and smoothly. SOLUTION: A curtain opening/closing device A comprises a curtain, a supporting/guiding rail 1 for the suspended can 5 of the curtain, a rope 4 arranged in parallel with the rail 1, and an electric actuator 3 for reciprocating the rope 4 as a resisting force member, one end of the curtain being attached to the actuator 3. The actuator 3 is provided with a driving pulley 6 having an annular groove engaged with the rope 4 by a friction force, a motor M for reciprocating and rotating the driving pulley 6 and a reduction gear G. Power for the motor M is supplied by a power source cord sewn along the upper end of the curtain.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a curtain opening / closing device and an actuator used therefor. More specifically, the present invention relates to a curtain opening / closing device for opening / closing a curtain or the like that covers a door of a luggage compartment from inside so as not to let air inside a vehicle such as a freezing car, a cool car, and a warm car, and an actuator used therefor.

[0002]

2. Description of the Related Art An example of a heat insulating curtain for a refrigerator car is described in Japanese Patent Application Laid-Open No. 9-207648. However, in this apparatus, a curtain that partitions a frozen luggage compartment back and forth is manually slid along a curtain guide bar to be opened and closed. Further, a pair of left and right rails that support both ends of the curtain guide bar and move the curtain back and forth along the wall of the freezing luggage compartment are provided, but this operation is also a manual operation.

On the other hand, there is known a curtain opening / closing device which opens and closes a curtain for covering a window of an automobile or a window of a building from the indoor side by using a string or a rope by electric drive (for example, see Japanese Patent Application Laid-Open No. 54-19868). ). This is shown in FIG.
As shown in FIG. 2A, a string or a rope 103 for opening and closing a curtain 102 suspended on a curtain rail 101 is connected to two lines.
The pulleys 104 and 105 are arranged in a closed loop, and an actuator 106 with a motor for circulating the string or rope 103 is connected to one pulley 105.
It is connected to. Also, as shown in FIG.
A curtain opening / closing device in which winding ends are alternately wound by winding drums 108, 109 and actuators 106, 106 is also conceivable.

Further, Japanese Utility Model Laid-Open No. 57-116188 discloses a spiral cord 112 provided with a folded portion 110 having a small loop pitch and an extended portion 111 having a large loop pitch as shown in FIG. A ring (suspension can) 113 is engaged with several loops of 112,
A curtain adjustment device in which the curtain 102 is suspended via the rings 113 is disclosed. When the spiral cord 112 is reciprocated about the axis thereof by an actuator 106 with a motor, the curtain 102 is folded when the ring 113 is aligned with the folding part 110 and the curtain is folded when the ring 113 is aligned with the extending part 111. 102 is expanded.

[0005]

The heat-insulating curtain for manually operating a refrigerator car or a cold-storage car has the advantage of being free to enter and exit while satisfying the cooling effect at the time of loading and unloading cargo. However, opening and closing operations is troublesome when holding heavy luggage with both hands. In addition, it is not hygienic because the curtain is dirty. Furthermore, even if luggage is once placed, work efficiency is reduced.

The curtain opening / closing device (FIGS. 5A and 5B) for opening and closing the window curtain can easily open and close the curtain 102 because the curtain 102 can be opened and closed by electric drive. However, since the curtain is operated in two directions of opening and closing, the pulleys 104, 105 and the winding drums 108, 1
09 is rotatably mounted on a wall etc.
Since 03 or the like is arranged in a closed loop or linear shape, and the actuator 106 with a motor is mounted on a wall or the like, the overall configuration becomes complicated. Further, when one of the pulleys 105 in the apparatus of FIG. 5A is driven by the actuator 106, there is a problem that the rope 103 and the pulley 105 are likely to slip, and in the case of a two-curtain, the ropes interfere with each other. In the apparatus shown in FIG. 5B in which both ends of the rope 103 are driven by winding drums 108 and 109 on both sides, two actuators 10 are used.
6, the cost is high and the control is complicated.

On the other hand, the opening / closing device using the spiral cord 112 shown in FIG. 6 has the advantage that only one drive unit is required and only one cord extends to the left and right. However, when the spiral cord 112 is rotated at a high speed, the movement of the ring 113 does not follow,
It is difficult to open and close the curtain 102 at high speed.
Therefore, it is not desirable in that the smoothness when entering and exiting a car or the like is impaired. It is conceivable to use a helical shaft or a screw having high rigidity in place of the helical cord 112, but in such a case, support and driving of the helical shaft become complicated.

An object of the present invention is to provide a curtain opening / closing device in which the structure and installation work of the device are simple and the opening / closing operation is relatively fast and smooth.

[0009]

According to a first aspect of the present invention, there is provided a curtain opening and closing device comprising: a curtain; a rail for supporting and guiding a hanging can of the curtain; and a rope arranged in parallel with the rail. And an electric actuator to which one end of the curtain is attached and which reciprocates by using a rope as a reaction force member. The curtain opening and closing device according to claim 2, wherein the actuator is provided with a drive pulley having an annular groove that frictionally engages with a rope;
It is characterized by including a guide member for bringing a rope into contact with the driving pulley and a motor for reciprocatingly rotating the driving pulley.

According to a third aspect of the present invention, in the curtain opening / closing device, the actuator is rotated at a distance from the drive pulley having an annular groove engaged with the rope by frictional force on the opposite side of the drive pulley so as to sandwich the rope. It is provided with two guide members freely arranged and a motor for reciprocatingly rotating the drive pulley, wherein a part of the rope is engaged with the drive pulley within a predetermined angle range. .

According to a fourth aspect of the present invention, in the curtain opening / closing device, the other end of the curtain is locked to a stationary object so as not to travel along a rail, and the actuator is driven from the other end of the curtain to one end attached to the actuator. And / or a flexible electric wire for control is attached. The curtain opening / closing device according to claim 5 is characterized in that the actuator is hung movably by a rail.

The actuator of the present invention (claim 6)
An actuator used in the curtain opening / closing device described above, wherein two guide pulleys to be arranged at an interval from each other on one side of a rope, and a state in which the two guide pulleys contact the opposite side of the rope. And a drive pulley arranged so as to sandwich a rope between the two guide pulleys, and a motor for reciprocatingly rotating the drive pulley. The actuator according to claim 7, wherein the two guide pulleys and the drive pulley have external teeth meshing with each other on the surface thereof, and an annular groove for passing a rope through the row of the external teeth is formed. It is characterized by having.

[0013]

In the curtain opening / closing device according to the present invention, the rope is stationary, and the actuator self-runs using the rope as a reaction force member, contrary to the conventional electric opening / closing device. Therefore, the configuration of the entire apparatus is simple, and even when the apparatus is installed inside a cool car or the like, it can be easily installed only by fixing both ends of the rope.

According to the second aspect of the present invention, the driving pulley has an annular groove, and the rope is in contact with the driving pulley by the guide member. Therefore, the driving pulley is firmly engaged with the rope by frictional force. be able to. Therefore, the actuator can run stably. Further, since the driving pulley and the rope are engaged by frictional force, when the curtain is completely extended, the driving pulley slips with respect to the rope. Therefore, there is no need to accurately control the actuator stop position, and no positioning sensor is required.
The control mechanism is simplified. In the device according to the third aspect, since the tape is passed between the three drive pulleys and the two guide members so as to be wound in a staggered manner, the contact length between the rope, the drive pulleys, and the guide members is long, and the friction is high. Power is also great. Therefore, the actuator can more stably engage with the rope.

In the device according to the fourth aspect, since the electric wire for driving or controlling the actuator is attached to the curtain, the wiring is simplified, and the periphery of the curtain is neatly arranged. In the device according to the fifth aspect, since the actuator is hung on the rail, the burden on the rope or the curtain by the weight of the actuator on the curtain is reduced, and the vehicle can run stably.

The actuator of the present invention (claim 6)
Since the three pulleys are arranged so as to wind the rope in a staggered manner, the contact length between the rope and the pulley is long and the frictional force is large. Therefore, the actuator can be stably gripped by the rope. In the actuator according to the present invention, since the external teeth meshing with each other are formed on the surfaces of the two guide pulleys and the drive pulley, the rotation between the pulleys is surely synchronized, and the rotation between the rope and each pulley is established. Slip is less likely to occur. Further, since the rope is formed on the surfaces of the guide pulley and the drive pulley, the rope is not affected even if the external teeth mesh with each other.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A curtain opening and closing device and an actuator according to the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic perspective view showing an embodiment of the curtain opening / closing device of the present invention, FIG. 2A is a plan view showing an embodiment of the actuator of the present invention, FIG. 2B is a sectional view taken along the line II-II of FIG. Is a sectional view showing another embodiment of the actuator of the present invention, and FIG. 4 is a sectional view taken along line IV-IV of FIG.

The curtain opening / closing device A shown in FIG. 1 is provided at the entrance of a cool car. This switchgear A,
A rail 1 suspended from the ceiling of the vehicle, a curtain 2 movably suspended on the rail, an actuator 3 attached to an open / close end of the curtain, and a reaction force member when the actuator 3 travels. And a rope 4. The rail 1 can be made of a structural member such as a light-weight grooved steel with a lip having a C-shaped cross section, and is suspended from the ceiling by a support 1a or the like.

A plurality of hanging cans 5 are sewn to the upper end of the curtain 2, and the upper ends of the hanging cans 5 are slidably engaged with the rail 1. As described later, a roller may be rotatably provided at the upper end of the hanging can 5 so that the roller rolls in the rail 1. Also, in the case of FIG. 1, the hanging can 5 directly
5 so that most of the weight is directly supported by the rail 1. Note that a large part of the weight of the actuator 3 may be supported by the rope 4 and a part of the weight may be supported by the rail 1 via the curtain 2.

Inside the actuator 3, a driving pulley 6 is rotatably accommodated around an axis extending in a vertical direction. The driving pulley 6 is connected to a motor M and a speed reducer G, and is driven to reciprocate by them. I am trying to. The power cord 7 and the control line of the motor M are sewn to the folded portion near the upper end of the curtain 2, and the power cord 7 or the control line which goes out from the other end of the curtain 2 is a controller installed in a luggage room or a driver's cab. 8. The hanging can 5 at the other end of the curtain 2
The rail 1 is locked so as not to move.

The rope 4 is arranged in parallel with the rail 1, and both ends of the rope 4 are attached to a stationary member such as a support 1a of the rail 1 or a vehicle interior wall via tension maintaining springs 9, 9. The rope 4 employs a resin rope. In the present embodiment, the middle part 4a of the rope 4
Is engaged with the drive pulley 6 of the actuator 3 so as to make a full turn, and is pressed by the tension of the rope 4 itself. As will be described later (see FIG. 2A), the middle portion 4a of the rope 4 is bent into a U-shape or an Ω-shape, and the bent portion is guided by the guide pulleys 13 and 13 at a predetermined angle of the drive pulley 6. It is also possible to press against a part of the range and engage by frictional force.

When the motor M rotates forward by the operation of the controller 8 and the drive pulley rotates in the direction of the arrow S1, the drive pulley 6 feeds the rope 4 out to the opposite side while winding the left portion thereof. To go. Therefore, the actuator 3 advances to the left along the rail 1 by the reaction force, gradually expands the curtain 2, and closes the entrance and the like. When the curtain 2 is fully extended, the drive pulley 6 slips or the motor M is stopped by the timer. When the motor M rotates in the opposite direction, the actuator 2 moves to the right, contrary to the above, and the curtain 2 opens. When the curtain 2 is folded, the motor M is stopped. However, when the curtain 2 is folded, the actuator 3 may be forcibly stopped to cause a slip between the drive pulley 6 and the rope 4, and then the motor M may be stopped.

As described above, in the curtain opening / closing device A, the rope 4 or the like connected to the curtain is not circulated or wound, but the rope 4 is fixed and the actuator 3 is reciprocated by using the rope 4 as a reaction force member. The running configuration is adopted. Therefore, it is only necessary to attach the rope 4 to the automobile. Further, since the actuator 3 travels by rotating the drive pulley 6 with the rope 4 as a reaction force element, a relatively high-speed opening / closing operation is possible.

FIGS. 2a and 2b show another embodiment of the actuator 3 described above. The actuator 3 includes a case 10 with a box facing downward. A bracket 11 for hanging with a hanging can is fixed to the upper surface of the case 10 by upper portions of two shafts 12, 12. That is, the upper end of each shaft 12 is thinned, and the thinned portion is penetrated from below through the hole formed on the upper surface of the case 10 and the hole of the bracket 11, and the front end is caulked and fixed to the case 10. . When the actuator 3 is hung by the rope 4, the bracket 11 can be omitted. A pair of guide pulleys 13, 13 for pressing the rope 4 in a Ω shape around the drive pulley 6 are rotatably provided around each shaft 12, and the guide pulley 13 includes two shafts 12,
It is supported by a housing (motor bracket) 14 attached to the lower part of the motor 12. That is, the guide pulleys 13 are the “guide member” according to claim 2.
The housing 14 is attached to the shafts 12, 12 by screws 14a.
It is fixed to. The rope 4 has one guide pulley 13
After being engaged with the drive pulley 6, they are arranged in a staggered manner so as to engage with the drive pulley 6 in the opposite direction and further with the other guide pulley 13. Therefore, there is no possibility of interference between the ropes 4 as compared with a case where the ropes 4 are wound around one round as shown in FIG.

A flange Ma of the motor M is fixed to the lower surface of the housing 14 by screws Mb. A known first planetary gear reducer G <b> 1 for reducing the rotation of the motor M is incorporated in the housing 14, and a known second planetary gear reducer G <b> 2 is provided between the housing 14 and the upper surface of the case 10. Is housed. That is, the housing 1
The inside of 4 is a cylindrical cavity, and the internal gear 16 is fixed to the inner wall surface. A pinion (sun gear) is fixed to an output shaft (not shown) of the motor M, and a plurality of planetary gears rotatably supported by a carrier are interposed between the sun gear and the internal gear 16. ing.
The carrier is the output element of the first planetary gear reducer G1.

The input shaft of the second planetary gear reducer G2 is integrally provided on the carrier, and a sun gear is formed on the surface of the input shaft. Further, a cylindrical support portion 17 is provided on the upper surface of the housing 14, and the drive pulley 6 having an inner surface as an internal gear 18 is rotatably fitted to the support portion. A plurality of planet gears 19 rotatably supported by a carrier fixed at the upper end of the case 10 are interposed between the sun gear and the internal gear 18. That is, the driving pulley 3 as an output member also serves as an internal gear.

External teeth 20 and 21 meshing with each other are formed around the guide pulleys 13 and 13 and the driving pulley 6. The external teeth 20 and 21 are disposed at the center in the axial direction in the circumferential direction. Annular grooves 22 and 23 are formed through which the rope 4 extends. Therefore, the annular groove 22 is also provided at the portion where the guide pulley 13 and the driving pulley 6 mesh.
A rope passage surrounded by 23 is formed. Annular groove 2
2, 23, so that the width gradually narrows at the bottom,
Preferably, the inner wall is tapered. In that case, the rope 4 can be firmly engaged with the frictional force.

In the above actuator 3, when the motor M rotates in one direction, the sun gear of the first planetary gear reducer G1 rotates accordingly, and the carrier is reduced in the same direction via the planetary gear and rotates. . Further, the shaft of the second planetary gear reducer G2 integrated with the carrier and the sun gear rotate in the same direction, and the driving pulley 6 integrated with the internal gear 18 is further reduced in the opposite direction via the planetary gear 19 and rotated. . At this time, the guide pulleys 13 meshing with the external teeth 21 of the drive pulley 6 rotate in the opposite direction to the drive pulley 6. Thereby, each pulley 13, 6, 1 along the curved path
The rope 4 engaged so as to have an Ω shape with the rope 3 is drawn in from the front guide pulley 13, passes between the front guide pulley 13 and the drive pulley 6, and further engages with the rear guide pulley 13. It is sent backward while meeting. Thereby, the actuator 3 advances at the same speed as the pulling-in speed of the rope 4 using the rope 4 as a reaction force member. The same applies when retreating.

Next, another embodiment of the actuator will be described with reference to FIGS. This apparatus employs a roller reducer G3 using a motor shaft 27 and a roller bearing 28 in order to make the reducer compact. Further, instead of the above-described guide pulley 13, guide rollers 29 which abut on the periphery of the driving pulley 6 are used. The other points are substantially the same as those of the actuator 3 of FIGS. 2A and 2B described above, and the corresponding parts are denoted by the same reference numerals and description thereof will be omitted. The roller reducer G3 has a motor shaft 27 constituting an input shaft, a fixed cylinder 31 corresponding to an internal gear fixed to a motor fixing bracket 30, and a strong cylinder for transmitting a frictional force therebetween. A plurality of roller bearings 28, which are provided in contact with each other and have the same action as a planetary gear, and a support shaft 32 rotatably supporting the roller bearings 28.
And

The outer ring 28a and the inner ring 28b of the roller bearing 28 are rotatable by a ball 28c therebetween, and the support shaft 32 is tightly fitted to the inner ring 28b. The support shafts 32 are respectively fitted in holes 33 formed in the drive pulley 6, and the drive pulley 6 is rotatably supported around the motor shaft 27 via a bush 34. That is, the combination of the drive pulley 6 and the support shaft 32 functions as a carrier in the planetary gear reducer.

When the motor shaft 27 rotates, the outer ring 28a of the roller bearing 28 rotates due to frictional force, and rolls so as not to slide on the inner surface of the fixed cylinder 31. That is, the outer ring 28a revolves between the motor shaft 27 and the fixed cylinder 31 while rotating. Then, the decelerated revolving motion is transmitted to the drive pulley 6 by the support shaft 32 and is taken out as rotation of the drive pulley 6. This is a one-stage reduction, unlike the two-stage planetary gear reducer described above (see FIG. 2b). However, since the difference between the outer diameter of the motor shaft 27 and the inner diameter of the fixed cylinder 31 is large, a sufficient reduction ratio can be obtained only by one-step deceleration, and the configuration can be made compact.

Further, the actuator 3 shown in FIGS.
In the above, the bracket 11 provided on the upper part is supported by the two front and rear suspension cans 5, 5, and the roller 36 rotatably provided on the upper end of each suspension can 5, 5 is supported by the rail 1 so as to run freely. I have. The rollers 36 roll inside the rail 1. Therefore, since most of the weight of the actuator 3 is supported by the rope 4, it is possible to drive the vehicle stably, and the load on the rope 4 is light.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing one embodiment of a curtain opening and closing device of the present invention.

2A is a plan view showing an embodiment of the actuator of the present invention, and FIG. 2B is a sectional view taken along the line II-II of FIG. 2A.

FIG. 3 is a sectional view showing another embodiment of the actuator of the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

5A and 5B are perspective views each showing an example of a conventional curtain opening / closing device.

FIG. 6 is a schematic front view showing another example of a conventional curtain opening / closing device.

[Explanation of symbols]

 A Curtain opening and closing device 1 Rail 2 Curtain 3 Actuator 4 Rope 5 Hanging can 6 Drive pulley M Motor G Reduction gear 7 Power cord 13 Guide pulley 29 Guide roller

Claims (7)

[Claims] 1. A curtain, a rail for supporting and guiding a hanging can of the curtain, a rope arranged in parallel with the rail, and one end of the curtain attached, and reciprocating running using the rope as a reaction force member. Curtain opening / closing device, comprising a motorized actuator. 2. The driving device according to claim 1, wherein the actuator includes a driving pulley having an annular groove engaged with the rope by frictional force, a guide member for bringing the rope into contact with the driving pulley, and a motor for reciprocatingly rotating the driving pulley. The curtain opening / closing device according to claim 1, wherein: 3. A drive pulley having an annular groove engaged with a rope by frictional force, and two actuators rotatably arranged at an interval on the opposite side of the drive pulley so as to sandwich the rope. And a motor for reciprocating the drive pulley, and a part of the rope is engaged with the drive pulley within a predetermined angle range.
The curtain opening / closing device as described in the above. 4. The other end of the curtain is locked to a stationary object so as not to run along a rail, and the actuator is driven and / or controlled from the other end of the curtain to one end attached to the actuator. The curtain opening / closing device according to claim 1, wherein the flexible electric wire is attached. 5. The curtain opening / closing device according to claim 1, wherein the actuator is hung by a rail so that the actuator can travel. 6. The actuator used in the curtain opening / closing device according to claim 1, wherein two guide pulleys to be arranged at an interval from each other on one side of the rope, and the two guide pulleys on the opposite side of the rope. A driving pulley disposed in contact with the guide pulley of the present invention and sandwiching a rope between the two guide pulleys, and a motor for reciprocatingly rotating the driving pulley. Device actuator. 7. External teeth that mesh with each other are formed on the surfaces of the two guide pulleys and the drive pulley,
The actuator of a curtain opening / closing device according to claim 6, wherein an annular groove through which the rope passes is formed in the row of the external teeth.