JP6282694B2 - Backlash prevention rack and pinion gear - Google Patents

Description

  The present invention relates to a double sliding door provided with at least a low-speed opening / closing door and a high-speed opening / closing door, or a low-speed opening / closing door, and a triple sliding door provided with a medium-speed opening / closing door on the high-speed opening / closing door. It relates to an automatic door device.

Generally, a sliding door in an automatic door device of a double sliding door or an automatic door device of a triple sliding door is provided with an entrance through which a person enters and exits, a mounting lateral base positioned above the entrance, a door that opens and closes the entrance, And a rail portion that is attached to the lateral base and suspendably slides the sliding door.
As an automatic door device, a double sliding door that opens and closes two open / close doors is widely known. However, in recent years, the size of an entry / exit has become larger, and the width of an entrance / exit has become larger. In order to ensure this, triple sliding doors are often used with the number of doors to be opened and closed being changed from two to three.

  In this double sliding door and triple sliding door, the upper rack is attached to the horizontal mounting base, the low speed opening and closing door in the double sliding door, the pinion gear is attached to the low speed opening and closing door in the triple sliding door, the high speed opening and closing door in the double sliding door, and the triple sliding door By attaching the lower rack to the medium speed opening and closing door and pinching the pinion gear between the upper rack and the lower rack, and driving the high speed opening and closing door in the double sliding door and the medium speed opening and closing door in the triple sliding door by the drive device The low-speed door is opened and closed by moving the lower rack and rotating the pinion gear meshing with the lower rack.

2. Description of the Related Art Conventionally, an automatic sliding door using a rack and pinion gear that opens and closes a sliding door by combining a motor with a pinion with a rack at the top of the sliding door is known (see, for example, Patent Document 1).
This Patent Document 1 has a problem that a gap (backlash) is generated between the rack and the pinion, an abnormal noise is generated during braking, and it is harsh.
Such a gap (backlash) between the rack and the pinion increases due to wear, which causes generation of vibration and noise and a reduction in the life of the machine.

  In order to deal with such backlash, various devices have been conventionally used to reduce (eliminate) backlash. With respect to abnormal noise caused by a gap (backlash) between the rack and the pinion of Patent Document 1, the sliding door automatic opening / closing mechanism is configured by a motor that rotates forward and backward, a rack and a pinion, and either the rack or the pinion. A flute is formed by scraping one streak part of the tooth group of the tooth, and a soft or elastic band or band ring is provided in the flute part, and the other tooth tip presses the band or band ring during operation. An automatic sliding door opening and closing device configured to do so has been proposed (see, for example, Patent Document 2).

Japanese Utility Model Publication No. 4-6477 JP 2010-7375 A

However, in the automatic sliding door opening / closing device described in Patent Document 2, since one of the teeth of either the rack or the pinion is scraped to form a groove, the rack or the pinion can be used as it is. However, there is a problem in that either a rack or a pinion requires grooving to scrape off a part of a tooth group.
As described above, in the rack or pinion described in Patent Document 2, the groove or the pinion of the rack or pinion to be installed is subjected to groove processing for scraping off one of the teeth, so that the teeth of the teeth are scraped. Burrs are generated in the groove. For this reason, the rack or pinion described in Patent Document 2 has a problem that it is necessary to further remove this burr.

  In addition, in the rack or pinion described in Patent Document 2, a soft and elastic band member or band ring is fitted into the muscle groove portion, and the other tooth tip is a muscle while the rack and pinion is operating. Since the band member or the band ring fitted in the groove portion comes into pressure contact, there is a problem that either the rack or the pinion tooth group is worn during use.

  The present invention has been made in view of the above-described circumstances, and it is not necessary to perform a groove processing on one of the teeth of the rack or the pinion, preventing the occurrence of backlash, and either the rack or the pinion. An object of the present invention is to provide an anti-backlash rack and pinion gear which can prevent wear of one of the teeth.

The backlash prevention rack and pinion gear according to the present invention according to claim 1, which has been made to solve the above-mentioned problems, is an automatic door device in which at least one of the opening / closing drive parts of a plurality of sliding doors is driven by a rack and a pinion. In
An upper rack gear attached to an upper rack gear fixing portion formed on a base member fixed to the automatic door mounting frame;
A lower rack gear attached to the middle speed opening / closing door via a lower rack gear fixed base;
A pinion gear rotatably attached to the low-speed opening / closing door via a vertical plate portion;
With
The upper rack gear is fixed between an upper rack gear fixing portion that is fitted to the rotation shaft of the pinion gear and fixes the upper rack gear, and a lower rack gear fixing portion of the lower rack gear fixing base that fixes the lower rack gear. An elastic member is provided so as to be in pressure contact with the lower rack gear fixing portion .

According to the present invention having such a feature, since the elastic member fitted to the rotation shaft of the pinion gear is interposed between the rack gear fixing portion and the lower rack gear fixing base, the rack or pinion It is possible to prevent the occurrence of backlash even if any one of the tooth groups is not subjected to the groove processing.
In addition, since the elastic member does not come into contact with either the tooth group of the rack or the pinion, it is possible to prevent the tooth group of either the rack or the pinion from being worn.

The backlash prevention rack and pinion gear according to the second aspect of the present invention, which has been made to solve the above-mentioned problems, includes an elastic member in the backlash prevention rack and pinion gear according to the first aspect of the present invention. It is characterized by rolling between the upper rack gear fixing portion and the lower rack gear fixing portion in accordance with the rotation.

  According to the present invention having such a feature, the rack gear fixing portion and the lower rack gear fixing base are interposed between the rack gear fixing portion and the lower rack gear fixing base so as to press-contact the rack gear fixing portion and the lower rack gear fixing base by the elastic member, and the pinion gear can be rotated. Since they are formed so as to roll together, the occurrence of backlash can be prevented.

A backlash prevention rack and pinion gear according to the present invention as set forth in claim 3, which has been made to solve the above-described problems, comprises the automatic door device according to claim 1, the first open / close door and the second open / close door. In addition to the double sliding door device, including a third opening door and interlocking device, it consists of a triple sliding door,
The second opening / closing door corresponds to the middle-speed opening / closing door, and the first opening / closing door corresponds to the low-speed opening / closing door.

  According to the present invention having such a feature, in the triple sliding door, the first open / close door and the second open / close door are driven by the rack and pinion gear, and the occurrence of backlash of the rack and pinion gear can be prevented.

  According to the present invention, it is not necessary to process the groove of either the rack or the pinion, preventing the occurrence of backlash and preventing the wear of either the rack or the pinion. can do.

It is a front view which shows the closed state of the triple sliding door which employ | adopts the backlash prevention rack pinion gear which concerns on this invention. It is sectional drawing of the automatic opening / closing apparatus in the triple sliding door which employ | adopts the backlash prevention rack and pinion gear shown in FIG. It is the schematic when the drive device in the automatic opening / closing apparatus which employ | adopts the backlash prevention rack and pinion gear of FIG. 2 is seen from the apparatus front left side. It is the schematic when the drive device in the automatic opening / closing apparatus which employ | adopts the backlash prevention rack and pinion gear of FIG. 2 is seen from the apparatus front right side. FIG. 3 is an enlarged view of the backlash prevention rack and pinion gear of FIG. 2. It is a figure which shows the attachment state to the rack gear fixing | fixed part of the base member of the backlash prevention rack and pinion gear of FIG. FIG. 3 is an exploded perspective view of a low-speed door and a medium-speed door to the base member of FIG. 2. FIG. 3 is an exploded perspective view of the backlash prevention rack and pinion gear of FIG. 2. It is the schematic of a high-speed door and a hanging bracket structure part. It is the schematic of a medium speed opening-and-closing door and a suspension metal fitting structure part. It is the schematic of a low-speed opening / closing door and a suspension metal fitting structure part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the present specification, a triple sliding door will be described as an example of an automatic door device that drives a low-speed opening / closing door by a rack and pinion gear.

1 to 8 show an embodiment of a backlash prevention rack and pinion gear according to the present invention.
In this example, an example in which the backlash prevention rack and pinion gear is applied to a triple sliding door will be described.

  The triple sliding door is configured by adding a third opening / closing door and an interlocking device to the double sliding door device that interlocks the first opening / closing door and the second opening / closing door including the rack and pinion gear structure. . Thus, the triple sliding door has a structure based on the double sliding door device.

Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1 is a front view showing a closed state of a triple sliding door employing a backlash preventing rack and pinion gear according to the present invention, and FIG. 2 is an automatic opening / closing device in the triple sliding door employing the backlash preventing rack and pinion gear shown in FIG. FIG. 3 is a schematic view of the drive device in the automatic opening / closing device employing the backlash prevention rack and pinion gear of FIG. 2, as viewed from the front left side of the device, and FIG. 4 is a backlash prevention rack and pinion of FIG. FIG. 5 is an enlarged view of the backlash prevention rack and pinion gear of FIG. 2, and FIG. 6 is an illustration of the backlash prevention rack of FIG. FIG. 7 is a diagram showing a state in which the base member of the pinion gear is attached to the rack gear fixing portion, and FIG. 7 is an exploded oblique view of the low-speed door and the medium-speed door to the base member 2 FIG, 8 is an exploded perspective view of the anti-backlash rack and pinion gear of Figure 2.

  In FIG. 1, reference numeral 1 indicates a draw triple sliding door. The triple sliding door 1 is a kind of automatic door device that opens and closes in the left-right direction for the passage of people and the delivery of objects.

To explain in order from the left and right sides inward, the triple sliding door 1 includes a pair of first opening / closing doors (low speed opening / closing door) 2, a pair of second opening / closing doors (medium speed opening / closing door) 3, and a pair of third doors. An opening / closing door (high-speed opening / closing door) 4 is provided.
Further, an automatic opening / closing device 6 provided in the upper cover 5 for opening and closing these doors is provided.
The first opening / closing door 2 in the arrangement in the drawing may be called a low speed door or a low speed opening / closing door. The second open / close door 3 may be called a medium speed door or a medium speed open / close door. Further, the third opening / closing door 4 may be called a high-speed door or a high-speed opening / closing door.

  The first opening / closing door 2, the second opening / closing door 3, and the third opening / closing door 4 have no particular reference numerals, but each have a rectangular frame portion and a glass portion fitted inside the frame portion. At the upper end of the frame portion, a suspension fitting structure portion to be described later is provided.

  2 to 4, the automatic opening / closing device 6 includes a door controller (not shown), a driving device 7 controlled by the door controller, a double sliding door device 8, and the second opening / closing door 3 in the double sliding door device 8. And an opening / closing type interlocking device 9 (interlocking device) that interlocks with the opening / closing motion of the third opening / closing door 4. The triple sliding door 1 in the present invention is a double sliding door device 8 in which a third opening / closing door 4 and an interlocking device (opening / closing movement type interlocking device 9) are further added to form a triple sliding door.

The drive device 7 includes a motor 10 and a transmission mechanism 11. The driving device 7 is disposed so as to be positioned at the top of the automatic opening / closing device 6. The driving device 7 is electrically connected to a controller (not shown).
The motor 10 has a rotating shaft, and the rotating shaft and the speed reducer of the transmission mechanism 11 are connected by a belt (not shown). A drive pulley 13 (main drive pulley) of the belt mechanism 12 is assembled to the speed reducer. The belt mechanism 12 includes a drive pulley 13, a driven pulley 14, and a drive belt 15 that is wound around the drive pulley 13 and the driven pulley 14.

The drive pulley 13 and the driven pulley 14 are each formed with a predetermined number of teeth. That is, each is formed as a toothed pulley.
The driving pulley 13 and the driven pulley 14 are arranged at positions far apart from each other on the left and right. A long drive belt 15 is adopted because the drive pulley 13 and the driven pulley 14 are arranged as described above. Further, as the drive belt 15, a belt that meshes with the teeth of the drive pulley 13 and the driven pulley 14 is employed. The drive belt 15 is a known timing belt. Reference numeral 16 indicates a tooth skip lever.

  The double sliding door device 8 is arranged so as to be positioned on the lower side in the automatic opening / closing device 6. Moreover, the double sliding door apparatus 8 is also arrange | positioned so that it may be located in the upper frame 17 side as an automatic door mounting frame. Such a double sliding door device 8 includes a base member 18 fixed to the upper frame 17, a first opening / closing door 2 disposed on the upper frame 17 side, and the first opening / closing door 2 extending from the base member 18. A first rail 19 and a first hanging bracket structure 20 that can be freely opened and closed in a direction, a second opening / closing door 3 disposed next to the first opening / closing door 2 on the side away from the upper frame 17, and the second A second rail 21 and a second hanging bracket structure 22 that make the open / close door 3 freely openable and closable in the extending direction, a first open / close door (low speed open / close door) 2 and a second open / close door (medium speed open / close door). ) 3 and a rack and pinion gear structure 23 for interlocking the three.

  The base member 18 is formed in the shape shown in FIG. 2 by extracting an aluminum material. The base member 18 is formed with a first rail 19 extending straight in the extending direction and a second rail 21 disposed obliquely above the first rail 19 (the extending direction is the above-described extending direction). Match left and right). Further, an upper rack gear fixing portion 24 is formed on the base member 18.

Two first hanging bracket structures 20 are provided for each first opening / closing door (low speed opening / closing door) 2 (see FIG. 11). The two first hanging bracket structures 20 are arranged at left and right apart at the upper end of the frame portion of the first opening / closing door (medium speed opening / closing door) 2. The first hanging bracket structure portion 20 includes a vertical plate portion 25 bolted to the upper end of the frame portion, a horizontal plate portion 26 fixed to the upper end of the vertical plate portion 25, and a pair of rolling on the first rail 19. A hanger roller 27 is provided.
The vertical plate portion 25 is provided as a component that fixes the horizontal plate portion 26 extending in the left-right direction at a predetermined height position. A pair of hanger rollers 27 are rotatably mounted on one surface of the horizontal plate portion 26 extending in the left-right direction at a predetermined interval.
One pinion gear 33 (described later) is assembled on the other surface of the horizontal plate portion 26. The first rail 19 and the hanger roller 27 are formed in a shape that makes it difficult to remove the wheel so that the contact portions have a convex and concave shape.

  As with the first hanging bracket structure section 20 of the first opening / closing door (low speed opening / closing door) 2, two second hanging bracket structure sections 22 are provided for one second opening / closing door (medium speed opening / closing door) 3 (FIG. 6). The two second hanging bracket structure portions 22 are arranged apart from each other at the upper end of the frame portion of the second opening / closing door 3. The second hanging bracket structure 22 includes a vertical plate portion 28 that is bolted to the upper end of the frame portion, a horizontal plate portion 29 that is fixed to the upper end of the vertical plate portion 28, and a pair of hangers that roll on the second rail 21. A roller 30 is provided.

  The vertical plate portion 28 is provided as a component that fixes the horizontal plate portion 29 extending in the left-right direction at a predetermined height position. The vertical plate portion 28 is formed longer in the vertical direction than the vertical plate portion 25 of the first hanging bracket structure portion 20. A lower rack gear fixing base 35 (described later) constituting the rack and pinion gear structure 23 is assembled in the middle of the vertical plate portion 28 (see FIGS. 2 and 6). A pair of hanger rollers 30 is rotatably mounted on one surface of the horizontal plate portion 29 extending in the left-right direction with a predetermined interval. The 2nd rail 21 and the hanger roller 30 are formed in the shape which is hard to remove | deviate so that these contact parts may become convex and concave shape.

As shown in FIGS. 5 to 8, the rack and pinion gear structure portion 23 includes an upper rack gear 31, a lower rack gear 32, and a pinion gear 33.
When the second opening / closing door (medium speed opening / closing door) 3 is opened / closed, the rack / pinion gear structure 23 can open / close the first opening / closing door (low speed opening / closing door) 2 along with the opening / closing movement. It is configured.
Specifically, an upper rack gear 31, a lower rack gear 32, a pinion gear 33, and a lower rack gear fixed base 34 are provided so as to be able to perform the above opening and closing movements.

The upper rack gear 31 is a known rack gear and is attached to an upper rack gear fixing portion 24 formed on a base member 18 fixed to the upper frame 17 as an automatic door attachment frame.
The upper rack gear fixing portion 24 is formed to extend straight in the extending direction. Further, the second rail 21 is disposed and formed above the upper rack gear fixing portion 24 (in other words, the upper rack gear fixing portion 24 is disposed and formed below the second rail 21. ).

The lower rack gear 32 is a well-known rack gear, and is attached to the lower rack gear fixing portion 35 of the lower rack gear fixing base 34 assembled in the middle of the vertical plate portion 28 of the second opening / closing door (medium speed opening / closing door) 3. It is attached.
The lower rack gear fixing base 34 is formed in the shape shown in FIG. 2 by pulling out an aluminum material. Further, the lower rack gear fixing base 34 is formed to have a length necessary for interlocking the second opening / closing door 3 and the first opening / closing door 2. Specifically, it is formed in a length straddling the two second hanging bracket structures 22 (see FIG. 10). The lower rack gear fixing base 34 is formed in accordance with the lengths of the upper rack gear 31 and the lower rack gear 32.

The pinion gear 33 is assembled so as to mesh with the upper rack gear 31 and the lower rack gear 32. The pinion gear 33 is assembled to the horizontal plate portion 26 fixed to the upper end of the vertical plate portion 25 that is bolted to the upper end of the frame portion of the first opening / closing door (low speed opening / closing door) 2.
An elastic member 37 is attached to the rotation shaft 36 of the pinion gear 33. The elastic member 37 is formed of an elastic material, for example, a synthetic resin material, is formed in a ring shape, and is fitted and fixed to the rotating shaft 36 of the pinion gear 33.

The elastic member 37 is formed between the upper rack gear fixing portion 24 that fixes the upper rack gear 31 and the lower rack gear fixing portion 35 that holds the lower rack gear 32 of the lower rack gear fixing base 34 that fixes the lower rack gear 32. The upper rack gear fixing portion 24 and the lower rack gear fixing portion 35 are provided in pressure contact with each other.
This elastic member 37 is mounted to prevent the generation of noise due to backlash that occurs when the pinion gear 33 meshes with the upper rack gear 31 and the lower rack gear 32.

In this way, the upper rack gear 31 is fixed to the base member 18, and the lower rack gear 32 is assembled to the lower rack gear fixed base 34 that is assembled in the middle of the vertical plate portion 28 of the second opening / closing door (medium speed opening / closing door) 3. It is fixed to. Therefore, when the drive pulley 13 rotates clockwise and the drive belt 15 moves, the connecting fitting 38 moves along with this movement, and the second opening / closing door (medium speed opening / closing door) 3 opens and closes. The lower rack gear fixing base 34 is moved by the opening / closing movement of the second opening / closing door (medium speed opening / closing door) 3, and when the lower rack gear fixing base 34 is moved, the pinion meshing with the upper rack gear 31 and the lower rack gear 32 is moved. gear 33, the first door (slow door) while rotating 2 was moved, thereby opened and closed.

  The triple sliding door 1 which is an automatic door device according to the present invention is a configuration in which a third opening / closing door (high speed opening / closing door) 4 and an interlocking device are further added to the double sliding door device 8 as described above. The opening / closing movement of the third opening / closing door (high-speed opening / closing door) 4 and the opening / closing movement type interlocking device 9 as the interlocking device will be described in detail with reference to FIGS.

  The third opening / closing door (high-speed opening / closing door) 4 can be opened and closed in the extending direction by the following configuration. That is, the driving device 7, the belt mechanism 12 (that is, the driving pulley 13, the driven pulley 14, and the driving belt 15) driven by the driving device 7, the third rail 38 and the third hanging bracket structure 39, It can be opened and closed freely by the connecting metal 40 that connects the belt 15 and the third hanging metal structure 39.

The third rail 38 is formed on the base rail 42 constituting the base rail unit 41 for the third opening / closing door (high-speed opening / closing door) 4. The base rail unit 41 for the third opening / closing door (high-speed opening / closing door) 4 is separate from the base member 18 and is fixedly attached to the upper frame 17 at a position above the base member 18. The base rail 41 is formed in the shape shown in FIG. 2 by extracting an aluminum material. The base rail 41 is assembled at a lower position of the drive device 7.
A large-diameter driven pulley 43, which will be described later, is disposed below the base rail 41, and a third opening / closing door (high-speed opening / closing door) 4 is disposed below the base rail 41 at a further interval. The third rail 38 is formed so as to extend straight.

  Two third hanging bracket structures 39 are provided for one third opening / closing door (high-speed opening / closing door) 4 (see FIG. 9). The two third suspension bracket structures 39 are arranged at left and right apart at the upper end of the frame portion of the third opening / closing door (high-speed opening / closing door) 4. The third hanging bracket structure portion 39 includes a vertical plate portion 44 bolted to the upper end of the frame portion, a horizontal plate portion 45 fixed to the upper end of the vertical plate portion 44, and a pair of hangers that roll on the third rail 38. And a roller 46.

  The vertical plate portion 44 is provided as a plate-like component that is wide and extends vertically. In the vertical plate portion 44, a horizontal plate portion 45 is fixed to the upper end, and a coupling fitting fixing portion 47 is formed in the middle. A third opening / closing door side connection fitting 48 to be described later is fixed to the connection fitting fixing portion 47. A pair of hanger rollers 46 are rotatably mounted on one surface of the horizontal plate portion 45 at a predetermined interval. The third rail 38 and the hanger roller 46 are formed in a shape that makes it difficult to remove the wheel such that the contact portions have a convex shape and a concave shape.

A connection fitting 40 is attached to one of the two third hanging bracket structures 39 in the third opening / closing door (high-speed opening / closing door) 4. Specifically, the connecting bracket 40 is attached to the upper end side of the vertical plate portion 44. The connecting bracket 40 is a component for connecting the drive belt 15 and the third suspension bracket structure 39 as described above. In the arrangement of FIG. 2, the lower end of the drive belt 15 of FIGS. It is fixed.
In addition, the connection metal fitting provided in another 3rd opening-and-closing door (high-speed opening-and-closing door) 4 is hidden in the figure of drive pulley 13, and is in a state where it cannot be seen in FIG. This invisible connecting metal fitting is fixed to the upper part of the drive belt 15. For example, when the drive pulley 13 rotates clockwise and the drive belt 15 moves, the connection fitting that is not visible as the connection fitting 40 moves along with this movement. Specifically, the connecting bracket 40 fixed to the lower portion of the drive belt 15 moves leftward, and the invisible connecting bracket fixed to the upper portion of the drive belt 15 moves rightward (this The two third open / close doors (high-speed open / close doors 4) move in the opening direction).

  The opening / closing movement type interlocking device 9 is disposed between the second rail 21 and the third rail 38. The opening / closing type interlocking device 9 having such an arrangement includes a pair of large-diameter driven pulleys 43 having a large diameter, a large-diameter driven pulley belt 49 attached to the pair of large-diameter driven pulleys 43, A pair of small diameter driven pulleys 50 integrated with the diameter driven pulley 43 and formed with a smaller number of teeth than the large diameter driven pulley 43, a small diameter driven pulley belt 51 attached to the pair of small diameter driven pulleys 50, and a base member The third opening / closing door side connecting the pulley base 52 fixed to the shaft 18 and rotatably mounting the large-diameter driven pulley 43 and the small-diameter driven pulley 50 coaxially with the third suspension bracket structure 39 and the large-diameter pulley driven belt 49. A connection fitting 48 and a second opening / closing door side connection fitting 53 for connecting the second suspension fitting structure 22 and the small diameter pulley driven belt 1 are provided. It is configured Te.

The large-diameter driven pulley 43 is disposed above the third opening / closing door (high-speed opening / closing door) 4. The small-diameter driven pulley 50 integrated with the large-diameter driven pulley 43 is disposed above the second opening / closing door (medium-speed opening / closing door) 3.
In the pulley base 52, a large-diameter driven pulley 43 and a small-diameter driven pulley 50 are coaxially and rotatably attached to one end, and the other end is fixed to the base member 18. The middle of the pulley base 52 is formed so as to extend straight in the front-rear direction.

As described above, the third opening / closing door side connection fitting 48 is used as a part for connecting the third suspension fitting structure portion 39 and the large-diameter pulley driven belt 49. More specifically, one end of the third opening / closing door side connection fitting 48 is fixed to the connection fitting fixing portion 47 of the vertical plate portion 44 in the third suspension fitting structure portion 39. The other end of the third opening / closing door side connection fitting 48 is fixed to the lower portion of the large-diameter driven pulley belt 49.
Note that reference numeral 55 in FIG. 2 indicates a third opening / closing door-side fitting that is fixed to the upper portion of the large-diameter driven pulley belt 49 (see FIG. 4). This third opening / closing door side connection fitting 55 is fixed to a third suspension fitting structure 39 of a third opening / closing door (high-speed opening / closing door) 4 different from that in FIG. .

  When the two third open / close doors (high-speed open / close doors) 4 move in the opening direction, the third open / close door side fittings 54 and 55 move the large-diameter driven pulley belt 49 clockwise, When the three open / close doors (high speed open / close doors) 4 move in the closing direction, the large-diameter driven pulley belt 49 is attached to move counterclockwise.

  Since the large-diameter driven pulley belt 49 moves as described above, the large-diameter driven pulley 43 and the small-diameter driven pulley 50 that are coaxial and integral can be rotated clockwise and counterclockwise. As a result, the small-diameter pulley driven belt 51 also moves.

A second opening / closing door side connection fitting 53 is fixed to the small diameter pulley driven belt 51. As described above, the second opening / closing door side connection fitting 53 is used as a component for connecting the second suspension fitting structure portion 22 and the small-diameter pulley driven belt 51. More specifically, one end of the second opening / closing door side connection fitting 53 is fixed to the vertical plate portion 28 in the second suspension fitting structure portion 22.
The other end of the second opening / closing door side connection fitting 53 is fixed to the lower portion of the small diameter pulley driven belt 51.
Note that the second opening / closing door side connecting fitting provided in the second opening / closing door (medium speed opening / closing door) 3 different from that in FIG. 2 is hidden in the drawing of the small-diameter driven pulley 50 and is not visible in FIG. 2. . The invisible second opening / closing door side connection fitting is fixed to the upper portion of the small-diameter pulley driven belt 51. For example, when the small-diameter pulley driven belt 51 moves, the second opening / closing door side connection fitting 53 and the invisible second opening / closing door side connection fitting also move along with this movement.

  The movement of the second opening / closing door side connection fitting 53 and the movement of the second opening / closing door side connection fitting not seen cause the movement of the two second opening / closing doors (medium speed opening / closing doors) 3, and further the rack. The movement of the two first opening / closing doors (low speed opening / closing doors) 2 is caused via the pinion gear structure 23. That is, it can be seen that each door is interlocked.

  As described above with reference to FIGS. 1 to 11, according to the triple sliding door 1 according to the present invention, the first opening / closing door (low speed opening / closing door) 2 including the rack and pinion gear structure portion 23 and the like. In addition to the double sliding door device 8 for interlocking the second opening / closing door (medium speed opening / closing door) 3, a third opening / closing door (high speed opening / closing door) 4 and an opening / closing type interlocking device 9 are further added to form a triple sliding door. Therefore, the three open / close doors can be automatically opened / closed while utilizing the existing technology.

  In addition, according to the present invention, it is not necessary to perform a groove processing on one tooth group of the rack or the pinion, the occurrence of backlash is prevented, and the tooth group of either the rack or the pinion is worn. Can be prevented.

  In addition, although demonstrated by the example of a draw, of course, this invention is applicable also to a single drawing.

  In addition, the present invention can of course be modified in various ways within the scope not changing the gist of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Triple sliding door, 2 ... First opening / closing door (low speed opening / closing door), 3 ... Second opening / closing door (medium speed opening / closing door), 4 ... Third opening / closing door (high speed opening / closing door), 7 ... Drive device, 8 ... Two Double sliding door device, 9 ... Opening / closing movement type interlocking device (interlocking device), 10 ... Motor, 11 ... Transmission mechanism, 12 ... Belt mechanism, 13 ... Driving pulley, 14 ... Driven pulley, 15 ... Driving belt, 17 ... Upper frame, DESCRIPTION OF SYMBOLS 18 ... Base member, 20 ... 1st suspension bracket structure part, 22 ... 2nd suspension bracket structure part, 23 ... Rack and pinion gear structure part, 24 ... Upper rack gear fixing | fixed part, 27, 30 ... Hanger roller, 31 ... Upper rack gear 32 ... Lower rack gear, 33 ... Pinion gear, 34 ... Lower rack gear fixing base, 35 ... Lower rack gear fixing portion, 39 ... Third hanging bracket structure, 40 ... Connecting bracket 43 ... Large-diameter driven pulley, 46 ... Hanger roller, 47 ... Connecting bracket fixing part, 48, 55 ... Third open / close door side connecting bracket, 49 ... Large-diameter driven pulley belt, 50 ... Small-diameter driven pulley, 51 ... Small-diameter driven Pulley belt, 53 ... Second opening / closing door side fitting

Claims (3)

In an automatic door device in which at least one of a plurality of sliding door opening and closing drive units is driven by a rack and a pinion,
An upper rack gear attached to an upper rack gear fixing portion formed on a base member fixed to the automatic door mounting frame;
A lower rack gear attached to the middle speed opening / closing door via a lower rack gear fixed base;
A pinion gear rotatably attached to the low-speed opening / closing door via a vertical plate portion;
With
The upper rack gear is fixed between an upper rack gear fixing portion that is fitted to the rotation shaft of the pinion gear and fixes the upper rack gear, and a lower rack gear fixing portion of the lower rack gear fixing base that fixes the lower rack gear. A backlash preventing rack and pinion gear, characterized in that an elastic member is provided so as to be in pressure contact with the lower rack gear fixing portion . The backlash preventing rack according to claim 1, wherein the elastic member rolls between the upper rack gear fixing portion and the lower rack gear fixing portion in accordance with the rotation of the pinion gear.・ Pinion gear. The automatic door device is a double sliding door device including a first open / close door and a second open / close door, and further includes a third open / close door and an interlocking device to constitute a triple sliding door,
The said 2nd opening / closing door is corresponded to the said medium speed side opening / closing door, and said 1st opening / closing door is equivalent to the said low speed side opening / closing door. The Claim 1 or 2 characterized by the above-mentioned. Backlash prevention rack and pinion gear.

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