JPH0749025B2 - Switchgear - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curtain opening / closing device provided in a rear window of an automobile or the like.

[0002]

2. Description of the Related Art A curtain provided on a rear window of an automobile has rails attached to upper and lower window frame portions, a plurality of runners provided slidably on each rail, and the curtain is bridged between the upper and lower runners. The structure to stretch is generally known. In addition to the manual curtain structure in which a person manually opens and closes, this conventional curtain has recently been equipped with a mechanism for opening and closing the curtain by using a motor or the like and controlling the power on / off of the motor. The curtain was opened and closed from the center to the left and right.

[0003]

However, in the above-mentioned conventional curtain opening / closing mechanism, the rails are vertically arranged one by one.
Since each runner is slidable in a line, the two curtains move on the same rail, and when the curtains are closed, the two curtains do not overlap in the center, leaving a gap. It has the drawback of occurring.

Further, since a large number of runners are required to support the curtain, the number of parts is increased, and when the curtain is opened left and right, the curtain fabric is not collected at the left and right ends, which causes a curtain pool. There is a drawback, which also causes a problem of hindering the driver's vision.

Further, in recent years, since the outer shape of automobiles has been streamlined, the inclination of the rear window has a gentle angle, and the upper window frame has a shape positioned directly above the rear seats. In the opening and closing mechanism, there is a problem that the curtain rail hits the head of an occupant sitting in the back seat.

Therefore, in order to solve the above problems, the present invention has a structure in which a curtain gap does not occur when the curtain is opened and closed and the curtain fabric is kept to a minimum, thereby hindering the visibility. The purpose of the present invention is to provide a space-saving switchgear with a simple mechanism that does not have such a structure.

[0007]

Means for achieving the above-mentioned object will be described below with reference to FIGS. 1 to 7 corresponding to the embodiments. An opening / closing device 1 according to the present invention is provided at one end 2a of a rail frame 2 and has a drive unit 4 having a built-in clutch that disconnects power transmission when an overload occurs.
A drive gear 9 that is interlocked with the drive unit 4, a driven gear 13 that is disposed at the other end 2b of the rail frame 2 and is biased in a direction opposite to the drive gear 9, and a woven tape. Resin teeth 23b are crimped and molded at a predetermined pitch on 23a, and each tooth 23b is formed in an endless ring shape so that the teeth 23b face inward, and the drive gear 9 and the driven gear 13 are also provided.
And a flexible rack 23 that meshes with the gears 9.13 and is wound between the gears 9.13, and the flexible rack 23 that is positioned between the gears 9 and 13 of the flexible rack 23 that is wound around the gears 9 and 13. Rail racks 24, which are arranged along 23 and are provided with teeth 24d having the same pitch as the flexible rack 23 on both sides, and each tooth 24d on both sides faces each tooth 23b of the flexible rack 23; Each tooth 24d of the rail rack 24 and each tooth 24d of the flexible rack 23 located on both sides 24b, 24c of the rail rack 24 and facing each tooth 24d.
3b and the respective racks 23, 2
A pair of pinions 2 that move simultaneously in opposite directions between the four
5, 26, a pair of runners 27, 28 rotatably supported by the pinions 25, 26, a drive gear 9 and a driven gear 13 arranged at both ends of the rail frame 2.
A pair of first pulleys 10, 18 arranged near each of the
A pair of second pulleys 11 and 19 adjacent to the first pulleys 10 and 18 and slightly closer to the first pulleys 10 and 18, and the first and second pulleys. Pair of return pulleys 20 and 21 disposed at opposed positions apart from each of the pulleys 10, 18, 11, and 19 by a predetermined distance, and the pair of return pulleys 20 and 21.
The first and second pulleys 10, 18, 11, which are wound between the return pulleys 20 and 21 and face each other.
19 is installed in a substantially U-shaped manner, circulates circularly in the U-shaped pattern, and is disposed on each of the runners 27 and 28 located at an equal distance from the middle of each of the first and second pulleys. The ropes 29 to which the midway portions are respectively fixed and pleats having a predetermined width are fixed to the outer side surface 2c of the rail frame 2 at one edge 33c, and the return pulleys 20, 21 One return pulley 20 and first and second pulleys 1 facing the return pulley 20.
One end 33a of the other edge portion 33d is fixed to one of the pair of reciprocating ropes between 0 and 11, and the other return pulley 21
And the first and second pulleys 1 facing the return pulley 21
One end 33 of a pair of reciprocating ropes between 8 and 19
The other end 33b of the other edge portion 33d is fixed to one rope that moves in the same direction as the one rope to which a is fixed, and each pair is formed on both side edges 33a and 33b of each pleat. A curtain 33 in which the pair of reciprocating ropes 29 are inserted and guided through the guide holes 34 and 35 of
And is provided.

[0008]

The driving gear 4 connected to the driving portion 4 is interlocked by the driving of the driving portion 4, and the flexible rack 23 wound between the driven gear 13 and the driven gear 13 rotates in the rail frame 2. A pair of pinions 25, 2 arranged on both sides of a rail rack 24 arranged between the flexible racks 23.
6 rotates with the flexible rack 23 on both sides of the rail rack 24 by the rotation of the flexible rack 23, and the pair of runners 27, 28 pivotally supported by the pinions 25, 26 moves. And the runner 2
The middle part is fixed to 7, 28 and the pair of return pulleys 20, 21 and the first and second pulleys 10, 18,
The rope 29 wound around 11 and 19 circularly moves in a circular pattern in a substantially U-shaped pattern. As a result, the curtain 33 having one edge 33c fixed to the rail frame 2 and the other edge 33d fixed to the rope 29 is opened and closed. During the opening / closing operation, the guide holes 34 and 35 formed for each pleat of the curtain 33 are guided by the rope 29, and the curtain 33 opens and closes along the rope 29.

[0009]

First, the opening / closing device 1 of this embodiment is arranged such that the rail frame 2 is disposed above and the curtain 33 is moved in the vertical direction as shown in FIG. .

The rail frame 2 is horizontally fixed to, for example, an upper window frame of a rear window of an automobile.
The housing case 3 is attached to one end of the rail frame 2.
Is provided, and the drive unit 4 is disposed in the housing case 3. As shown in FIG. 2, the drive unit 4 is composed of a motor 5, an intermediate gear 6, and a clutch gear 7. The motor 5 is obliquely fixed to the housing case 3, and a worm gear 8 is provided on an output shaft 5a extending obliquely upward. The intermediate gear 6 meshes with the worm gear 8 so that the driving force is transmitted.
Further, the clutch gear 7 is axially supported by the side of the intermediate gear 6,
It meshes with this intermediate gear 6.

Next, a drive gear 9 is interlockingly connected to the drive unit 4. The drive gear 9 is coaxially supported with the clutch gear 7 as shown in FIG.
The clutch gear 7 and the clutch are provided so that the power of the motor 5 can be transmitted. The drive gear 9 is used in the flexible rack 2 described later.
It is designed to mesh with 3.

The housing case 3 in which the drive unit 4 and the drive gear 9 are provided has a pair of pulleys 1
0 and 11 are provided. These pulleys are located near the drive gear 9, one first pulley 10 is rotatably provided on the upper side of the housing case 3, and the second pulley 11 is on the lower left side of the first pulley 10. It is provided at a predetermined interval.

Next, at the other end 2b of the rail frame 2,
A housing case 12 having the same shape as the housing case 3 in which the drive unit 4 is provided is provided, and the driven gear 13 is provided.
Is provided. The driven gear 13 is the drive gear 9
It is formed in substantially the same shape as, and is rotatably supported by one side portion 14a of the substantially frame-shaped moving frame 14 as shown in FIG. The moving frame is slidably arranged inside a substantially U-shaped guide frame 15 fixed to the housing case 12. Further, one end of a tension coil spring 16 is connected to the other side portion 14b of the moving frame 14. The other end of the tension coil spring 16 is connected to an adjusting screw 17 provided on the side portion 15a of the guide frame 15.

Further, as shown in FIG. 4, a pair of pulleys 18 and 19 are provided in the housing case 12 in which the driven gear 13 is provided. These pulleys 18, 1
9 is paired with the first and second pulleys 10 and 11 provided on the housing case 3 on the drive unit 4 side, and one first pulley 18 is provided on the upper side of the housing case 12. The second pulley 19 is provided on the lower right side of the first pulley 18. That is, the first and second pulleys 10 and 11 on the side of the drive unit 4 and the first and second pulleys 18 and 19 on the side of the driven gear 13 are the second pulleys 11 as shown in FIG. , 19 are provided such that the distance between them is a little shorter than the distance between the first pulleys 10 and 18, and the positions are slightly closer to each other.

Further, both ends 2a, 2b of the rail frame 2 are
A predetermined distance below the first and second pulleys 10, 18, 11, 19 provided in the housing cases 3, 12 at both ends 2a, 2b of the rail frame 2, for example, a rear window of an automobile. As shown in FIG. 1, a pair of return pulleys 20 and 21 are provided at positions separated from each other by a height. These return pulleys 20 and 21 are 2
One set of pulleys 20a, 21a and these pulleys 20
brackets 20b, 2 for rotatably supporting a, 21a
It is generally composed of 1b. And the bracket 20
b and 21b are fixed near the both ends of the lower window frame of the automobile such as the rear window.

Next, the driven gear 13 and the drive gear 9 described above.
A flexible rack 23 is wound around and. This flexible rack 23 is formed by endless ring-shaped by pressing hard resin teeth 23b at a predetermined pitch on a woven tape 23a formed of nylon fiber or the like. That is, the rotation of the drive gear 9 is transmitted to the driven gear 13 via the flexible rack 23 to rotate inside the rail frame 2, and the slack of the flexible rack 23 is provided on the driven gear 13 side. The coil spring 16 prevents this.

Next, the rail frame 2 is provided with a rail rack 24 that is located between the flexible racks 23 that rotate in an elliptical shape with the teeth 23b directed inward and that extends along the flexible racks 23. . As shown in FIGS. 1 and 5, the rail rack 24 has the same structure as the flexible rack 23 attached on both surfaces of the upper surface 24b and the lower surface 24c of a long plate-shaped substrate 24a. That is, both tooth surfaces 24 of this rail rack 24
b and 24c face the teeth 23b of the flexible rack 23 and the teeth 23 of the flexible rack 23.
The teeth 24d have the same pitch as the pitch of b.

As shown in FIG. 5, a pair of pinions 25 and 26 are arranged between the tooth surfaces of the rail rack 24 and the flexible rack 23 which face each other. Each pinion 25, 26 has the same tooth pitch, and the rail rack 2
4 are located on the upper surface 24b side and the lower surface 24c side, respectively,
The rail rack 24 and the flexible rack 23 are adapted to be meshed with each other and roll between the racks 23 and 24. That is, the flexible rack 23 is rotated around the rail rack 24 by the drive unit 4 and the drive gear 9 so that each pinion 25, 2 is rotated.
6 is configured to move on the upper surface 24b and the lower surface 24c of the rail rack 24 at the same speed and the same distance in opposite directions. The pinions 25 and 26 are arranged so as to be equidistant from both ends of the rail rack 24 and the rail frame 2.

Next, the pinions 25 and 26 are provided with runners 27 and 28, respectively. Each of the runners 27, 28 has a substantially disk-shaped base portion with a pivot protruding from the center of the rear surface thereof, and a protrusion 27 having a mounting hole formed on the front surface thereof.
a and 28a are provided. And the runner 27,
The pivot shaft 28 is rotatably attached to the center hole of the pinions 25 and 26. A rope 29 is fixed to the projecting pieces 27a and 28a of the runners 27 and 28.

The rope 29 is made of a resin such as nylon. As shown in the schematic view of FIG. 6, the pair of return pulleys 20 and 21 serve as folding ends, and the return pulleys 20 and 21 are provided between the return pulleys 20 and 21. Each of the first pulleys 10 and 18 that are wound and are located at both ends of the rail frame 2
Further, it is laid over the second pulleys 11 and 19 in a substantially U-shape. That is, the rope 29 is circularly moved in a U-shaped pattern, and the outer rope 29 is bridged between the first pulleys 10 and 18.
A part of the middle portion of a is inserted into and fixed to the protruding piece 27a of the one runner 27 that moves on the rail rack upper surface 24b, and the inner rope 29b of the inner peripheral rope 29b that is bridged between the respective second pulleys 11 and 19 is fixed. A part of the middle portion is inserted into and fixed to the projecting piece 28a of the other runner 28 moving on the rail rack lower surface 24c.

The rope 29 is composed of two ropes, and one end 30 of each of the two end portions 30 and 31 to which each rope is connected has one return pulley 20 and the first and second opposing pulleys 20 and 31. On one side of the rope 29 that is a pair of reciprocating pairs between the second pulleys 10 and 11, and in the present embodiment, on the rope 29 on the inner peripheral side 29b that is between the second pulley 11 and this one return pulley 20. And the other connecting end 31 is
One of the connecting ends 30 on the side of the one return pulley 20 is connected to the other return pulley 21 and the first and second pulleys 18 and 19 that oppose the other return pulley 21. It is located on the rope 29a that moves in the same direction as the outer peripheral rope 29a between the first pulley 18 and the other return pulley 21 in this embodiment. The positions of these connection ends 30, 31 are set so that the distance from the rail frame 2 is the same, and the first or second pulleys 10, 18, 11, 19 and the return pulley 20,
It is possible to move in the same direction only between the runners 21 and 21, and the moving range is the longest within the moving ranges of the runners 27 and 28. That is, the rope 29 on the inner peripheral side 29b provided with one connection end 30 of the rope 29 is an extension of the rope 29 to which the other runner 28 moving on the lower surface 24c of the rail rack 24 is fixed, and the other Connection end 3
The rope 29 on the outer peripheral side 29b where 1 is provided is an extension of the rope 29 to which one runner 27 moving on the rail rack upper surface 24b is fixed. And
When one runner 27 is located on the left side in FIG. 6, since the rope 29 is connected and formed in a ring shape, the other runner 28 is located on the right side in the figure, and each connection end portion 3
The numbers 0 and 31 are downward, in other words, the positions closest to the return pulleys 20 and 21, and one runner 27
Is located on the right side in the figure, the other runner 28 is located on the left side in the figure, and the connection end portions 30 and 31 are located closest to the rail frame 2.

Next, a curtain 33 is attached to the rail frame 2 and the rope 29 described above. The curtain 33 is formed by pleating a woven fabric material such as synthetic fiber by heat setting or the like. As shown in FIG. 7, a pair of guide holes 34 and 35 are provided for each pleat on both side edges 33a and 33b of the curtain 33, respectively.
A pair of ropes 29 that reciprocate between 21 and each of the first and second pulleys 10, 18, 11, and 19 are inserted. These guide holes 34, 35 are obtained by performing embroidering or the like when forming the woven fabric material. That is, at the same time when the cloth is formed into a woven cloth, the peripheral portions of the guide holes 34 and 35 are formed by subjecting the cloth to the positions that will become the guide holes 34 and 35, and subjecting the cloth to the embroidering process.

An upper edge 33c as one edge of the curtain 33 is fixed to the lower side surface 2c as an outer side surface of the rail frame 2 described above. In addition, a support plate such as a metal plate is installed in the lower edge portion 33d as the other edge portion of the curtain 33, that is, the lowermost stage of the pleats so that the curtain 33 is supported straight so as not to bend in the center. Has become. Then, the connection ends 30 and 31 of the rope 29 are fixed to the respective one sides 34 of the pair of guide holes 34 and 35 formed on the both side edge portions of the bottom of the pleat. There is. That is, the curtain 3
3 has an upper edge 33c as a fixed end, and a lower edge 33d moves up and down as the rope 29 moves.

Next, the operation of the switchgear 1 constructed as described above will be described. First, when one runner 27 of each runner 27, 28 is in the vicinity of the right end of the rail rack 24, near the drive gear 9, and the other runner 28 is in the vicinity of the left end of the rail rack 24, near the driven gear 13. The pair of connection ends 30 and 31 of the rope 29 are close to the rail frame 2, all the pleats of the curtain 33 are folded, and the curtain 33 is in a fully opened state. At this time, the power switch (not shown) is off, the motor 5 of the drive unit 4 is stopped, the gears 6, 7 and 9 do not rotate, and the driven gear 13 is always the tension coil spring 16
Since the flexible rack 23 does not sag due to the urging force of the curtain 33, the curtain 33 does not fall by its own weight.

Next, the power switch is turned on to drive the drive unit 4.
When the drive gear 9 rotates via the intermediate gear 6 and the clutch gear 7, the flexible rack 23
Rotates between the drive gear 9 and the driven gear 13. Then, the pair of pinions 25, 26 rolls on the upper surface 24b and the lower surface 24c of the rail rack 24, and the respective pinions 25,
One of the runners 27 and 28 provided on the rail 26 is on the left side of the upper surface 24b of the rail rack 24, and the other runner 28 is on the lower surface side of the rail rack 24.
Move 4c to the right. At the same time, the ropes 29 fixed to the runners 27 and 28 rotate, and the inner peripheral side 29 of the pair of reciprocating ropes 29 on the one return pulley 20 side.
b and a pair of reciprocating ropes 29 on the other return pulley 21 side
A pair of connection end portions 30 located on each of the outer peripheral sides 29a of the
31 simultaneously moves downwards and these connecting ends 30, 3
The lower edge 33d of the curtain 33 fixed to 1 goes down,
The curtain 33 is closed.

When the curtain 33 is lowered to the lowermost position, that is, the return pulleys 20 and 21, and the curtain 33 is fully closed, the rope 29 to which the curtain 33 is fixed stops and the runners 27 and 28 also stop moving. To do. Then,
The rotation of the flexible rack 23 meshing with the pinions 25 and 26 of the runners 27 and 28 is stopped, and the drive gear 9
Also stops turning. At this time, the motor 5 continues to rotate with the power switch still turned on, but since the clutch is provided between the drive gear 9 and the clutch gear 7, the excess load of the motor 5 is driven. It is not transmitted to the gear 9 side. That is, even if the off operation of the power switch is delayed, each part is not burdened.

Further, in order to stop the curtain 33 halfway and bring it into a half-opened state, if the power switch is turned off at an arbitrary position, the curtain 33 stops without descending like the fully opened state of the curtain 33 described above.

Therefore, in the opening / closing device 1 configured as described above, the drive unit 4 serving as a drive source has the racks 23 and 24 for moving the runners 27 and 28 left and right accommodated in one rail frame 2. Therefore, for example, it is only attached to one window frame of the rear window of the automobile, space can be saved, and the window opening of the rear window is not obstructed.

Further, since the flexible rack 23 for moving the runners 27 and 28 is formed by crimping and molding the teeth 23b on the woven fabric tape 23a having high flexibility, the flexible rack 23 has a small thickness. The moving rail frame 2 can be formed to have a small diameter. From this, as described above, the window opening of the rear window is not obstructed, and the space can be saved.

Furthermore, since the curtain 33 is pleated, all the pleats of the curtain 33 are folded when the curtain 33 is fully opened, so that the curtain pool is minimized.

Further, since the opening and closing direction of the curtain 33 is the vertical direction, it is possible to correspond to the inclination angle of the sunlight, and the optimum light shielding can be performed.

Further, the curtain 33 has guide holes 34 and 35.
Since the curtain 33 is formed and inserted into the rope 29 and the curtain 33 is opened and closed by the movement of the runners 27 and 28, a large number of runners 27 and 28 that support the curtain 33 are not required, thereby reducing the number of parts. be able to.

In this embodiment, the rail frame 2 provided with the drive unit 4 and the like is arranged above, and the example in which the curtain 33 is lowered to close the rail frame 2 is described. A structure in which the curtain 33 is disposed and the curtain 33 is raised to be in the closed state may be used. In this case, it can be attached to the lower window frame of the rear window of an automobile, etc., and if the rear window is tilted at a gentle angle and the upper window frame is located directly above the rear seat,
It does not hit the head of an occupant sitting in the back seat.

Further, as described above, the opening / closing device 1 may be arranged so as to open and close the curtain left and right without opening and closing the curtain up and down. In this case, the rail frame 2 is arranged on the left side or the right side substantially vertically.

[0035]

As described above, in the opening / closing device according to the present invention, the runner for opening / closing the curtain is moved by the flexible rack having a small thickness in which the hard teeth are pressure-molded on the woven fabric tape having a high flexibility. Since it is performed, the gear (drive gear) for rotating the flexible rack can be formed to have a small diameter, and the rail frame for rotating the flexible rack can be formed to have a small diameter. Further, since the flexible rack and the drive unit for rotating and driving the flexible rack are housed in a single rail frame having a small diameter, it is possible to save space and thereby reduce obstruction of the window opening. This rail frame is attached only to the upper window frame of the rear window of the automobile, and the obstruction of the window opening of the rear window can be greatly reduced. Further, the position of each pulley around which the rope is wound is set so that each second pulley is slightly closer to each first pulley, and the first and second pulleys are returned to a facing position separated by a predetermined distance. Since the pulleys are arranged, this rope is wound in an annular shape in a U-shaped pattern between the pulleys, and can be installed between the pulleys so as to reciprocate substantially in parallel. By doing this, the moving direction of the runner rolling in each rack and the moving direction of the rope can be made substantially collinear to fix each other, and the movement of the runner can be satisfactorily transmitted to the rope. The rope that reciprocates between the first and second pulleys and the return pulley can guide the opening and closing movement of the curtain straightly. Also, since the curtain is pleated, when the curtain is fully opened, all the pleats of the curtain will be folded, which has the effect of minimizing the curtain pool, and in this fully opened state, the window Other than the rail frame on the drive portion side disposed on one side and the folded curtain, only the return pulley and the rope positioned between the return pulley and the first and second pulleys are provided, so There is an effect that it does not interfere with.
Further, the return pulley and the pair of reciprocating ropes located between the return pulley and the first and second pulleys are respectively inserted into the pair of guide holes of the curtain, so that the curtain opened and closed by the rope is Since the rope is guided, that is, the rope drives opening and closing of the curtain and also serves as a guide when opening and closing the curtain, there is an effect that a guide member for opening and closing the curtain is not required and the configuration is simplified. Further, a rope is inserted through the guide hole of the curtain, the curtain is opened and closed so as to be guided by the rope, and the curtain is opened and closed by moving the pair of runners in opposite directions. Therefore, a large number of runners that support the curtain are not required, and this has the effect of reducing the number of parts. Further, since the drive unit has a built-in clutch, even if an excessive load occurs when the curtain is opened or closed, it is not transmitted to the drive gear side, and there is an effect that no burden is placed on each unit. Further, since the urging force acts on the driven gear so as to be tensionally urged in the direction opposite to the drive gear, the flexible gear is wound around the drive and driven gears without slack. The gears are reliably rotated, and the pair of pinions rolling by the flexible rack and the rail rack are surely engaged with each other, so that the movement of the flexible rack is surely transmitted and each pinion is securely transmitted. Has the effect of being able to move between racks in opposite directions at the same time. Further, according to the opening / closing device of the present invention, it is also possible to dispose the rail frame below and to raise the curtain so that the curtain is closed.
In this case, for example, since the rail frame can be attached to the lower window frame of the rear window of an automobile or the like, the rail frame can be attached to an automobile with a gentle inclination of the rear window and the upper window frame is located right above the rear seat. It is also possible to construct a curtain that does not hit the head of an occupant seated in the rear seat and that has less obstruction to the vehicle interior space. Furthermore, according to this opening / closing device, the mounting position of the rail frame is in the vertical direction,
The opening and closing direction of the curtain can be left and right, and there is an effect that the mounting place is not limited. Also, since the curtain is structured to move from one end to the other to open and close, there is an effect that a gap due to the curtain does not occur. There is an effect that suitable light shielding can be performed, and there is an effect that optimum light shielding can be performed.

[Brief description of drawings]

FIG. 1 is a partially cut front view showing an embodiment of an opening / closing device according to the present invention.

FIG. 2 is an enlarged front view of the drive unit side of the switchgear according to the embodiment.

FIG. 3 is a plan view of the same.

FIG. 4 is an enlarged front view of a driven gear side of the switchgear according to the embodiment.

FIG. 5 is an enlarged front view of a flexible rack, a rail rack, and a runner of the opening / closing device according to the embodiment.

FIG. 6 is a schematic view showing a wound state of the rope according to the embodiment.

FIG. 7 is a schematic perspective view showing a side portion of the curtain.

[Explanation of symbols]

1 Opening / closing device 2 Rail frame 2a One end 2b Other end 2c Outer side surface (lower side surface) 4 Drive unit 9 Drive gears 10, 18
1st pulley 11 and 19 2nd pulley 13 Driven gears 20 and 21 Return pulley 23 Flexible rack 23a Woven tape 23b Teeth 24 Rail rack 24b Upper surface 24c Lower surface 24d Teeth 25,26 Pinion 27,28
Runner 29 Rope 33 Curtain 33a One side edge 33b Other side edge 33c One edge (upper edge) 33d Other edge (lower edge) 34, 35 Guide hole

Claims (1)

[Claims] 1. A drive unit (4), which is disposed at one end (2a) of a rail frame (2) and has a built-in clutch for cutting off power transmission when overloaded, and the drive unit (4). A drive gear (9) that is interlocked and connected to the other end (2b) of the rail frame (2),
A driven gear (13) that is pulled and urged in a direction opposite to the drive gear (9) and resin teeth (23b) are pressure-molded on a woven tape (23a) at a predetermined pitch to form each tooth (23b). ) Is inward
Is formed in an endless ring shape and meshes with the drive gear (9) and the driven gear (13) ,
Flexible rack (2 ) mounted between cars (9.13)
3) is located between the gears (9, 13) of the flexible rack (23) wound around the gears (9, 13) , and is arranged along the flexible rack (23), A tooth (24d) having the same pitch as that of the flexible rack (23) is provided on both sides, and each tooth (24d) on the both sides is a rail rack (24) facing each tooth (23b) of the flexible rack (23). , Located on both sides (24b, 24c) of the rail rack (24), and each tooth (24) of the rail rack (24).
rolling What each tooth (23b) and the bite each case of a flexible rack (23) which d) and facing the respective tooth (24d)
And, in the opposite directions each rack (23, 24) between the time
A pair of moving pinions (25, 26), a pair of runners (27, 28) pivotally supported by each of the pinions (25, 26), and arranged at both ends of the rail frame (2). this together is the the drive gear (9) and a pair of first pulleys disposed in each neighborhood of the driven gear (13) (10, 18), adjacent to the respective first pulley (10, 18)
These are slightly closer to each other than the first pulley (10, 18)
Pair of second pulleys (11, 19) provided at different positions
And each of the first and second pulleys (10, 18, 11, 1)
9) is wound between a pair of return pulleys (20, 21) arranged at opposed positions apart from each other by a predetermined distance, and the return pulleys (20, 21). , 21) through the first and second pulleys (10, 18, 11, 19) at the opposite positions, and are circulated circularly in a U-shaped pattern, and midway to the each runner (27, 28) located from the middle equidistant of each of the first and second pulleys
Rope (29) to which each part is fixed, and pleat processing to a predetermined width are applied , one edge part (33c) is fixed to the outer side surface (2c) of the rail frame (2), and each return One return pulley (20) of the pulleys (20, 21) and the return pulley (20)
One end (33a) of the other edge portion (33d) is fixed to one of the pair of reciprocating ropes between the first and second pulleys (10, 11) facing each other, and the other return pulley (21). One of a pair of reciprocating ropes between the first and second pulleys (18, 19) facing the return pulley (21) and one of which moves in the same direction as one rope to which the one end (33a) is fixed The other end (33b) of the other edge portion (33d) is fixed to the rope of and the both side edges (3
Wherein 3a, the curtain (33) of said each pair of guide holes which are puncture set, respectively it 33b) (34, 35) both reciprocating a pair of ropes (29) is inserted guided, by comprising the Switchgear to.