JPH0227513B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows a door that is to close an opening in a wall to slide freely along the wall surface, and when the opening is closed, one side of the door is stored almost flush with one side of the wall. The present invention relates to an automatic opening/closing device for a sliding door in which sliding and storage of the door is driven by a single prime mover, and is particularly suitable for an opening/closing device for a sliding door for a vehicle.

There are two main types of sliding door opening/closing methods. The first opening/closing method is a simple one-way sliding method along a track laid along a wall or the outside surface of a car body, such as those used in houses and railroad cars. The second method is automobiles,
Particularly used in van-type automobiles, when the door is closed, the outer panel of the door is retracted almost flush with the outer panel of the vehicle body, and when the door is opened, the door is swung outward from the outer panel of the body, and then It is of a type that allows the outside to slide along the outer skin of the body.

In the sliding door of the second type, the first and second guide rails are placed at the top and bottom of the opening of the automobile body at positions corresponding to the vertical center of the opening, and the door slides on the outside thereof. A third guide rail is attached to each of the body outer panels, and one end of the guide rail in the sliding direction of the door is curved in an arc shape toward the inside of the automobile body, and a guide device is attached to the other end of the door in the sliding direction. By making the guide device slidable on the third guide rail and attached to one end of the door in the sliding direction slidable on the first and second guide rails, the door of the guide device can be slid on the third guide rail as necessary. By making the attachment rotatable, when the opening in the car body is closed, the outer panel of the door can be stored in almost the same plane as the outer panel of the body, and when the door is opened, the outer panel of the door can be retracted in the initial stage. It is swung out so as to float to the outside of the body outer panel, and then slid along the surface of the body outer panel.

When attempting to automatically open and close such a second type of sliding door using a prime mover, such as an electric motor, the door swings out to the outside of the body and slides along the surface of the body. must be done simultaneously or separately. If these were to be driven by separate prime movers, at least two prime movers would be required, and the timing would need to be adjusted between the outward swinging motion and the sliding movement along the outer surface of the body.

The present invention enables the sliding of the door and the swinging out of the door substantially perpendicular to the sliding direction to be performed separately or by a single prime mover, regardless of the shape of the guide rail or the method of guiding the door along the guide rail of the guide device. An object of the present invention is to provide an automatic opening/closing device that can be operated by synthesis.

The drawings show one embodiment of the present invention, and the sliding door of a van-type vehicle is normally shown in FIGS. 1 and 2.
As shown in the figure, when a door 3 is to close an opening 2 for getting on and off or loading/unloading cargo provided on the side of a car body 1, its outer surface is the outer surface of the body 1 in a position where the opening 2 is closed. body 1 when opening opening 2.
After being swung out to the outside of the outer surface of the body 1, it is slid toward the rear of the automobile parallel to the outer surface of the body 1. For this purpose, the automobile body 1 is provided with first guide rails 4 along the top and bottom edges of the opening 2, respectively.
A second guide rail 5 (FIG. 4) is provided, and a third guide rail 5 (FIG. 4) is provided on the outer panel surface of the body 1 rearward from the opening 2 in the direction of travel of the vehicle at a position corresponding to the vertical center of the opening 2. A guide rail 6 is provided (hereinafter, "front" or "rear" refers to the front or rear with respect to the forward direction of the automobile), and the front end of each of these rails 4, 5, and 6 is curved toward the inside of the body 1. Make it into a tight shape. Guide devices 8, 9, 10 supporting one or more rollers 7, 7 that engage with the guide rails 4, 5, 6, respectively, are placed at the front end of the door 3 at the top position A and the bottom position B. Also, the door 3 is provided on the inner surface of the rear end at the center position C in the vertical direction, and the door 3 is connected to the guide rail 4,
It is configured to slide along lines 5 and 6.
The positions of the first and second guide rails 4 and 5 corresponding to the opening 2 are substantially symmetrical, and their curved shapes are also substantially the same. Also, the weight of the door 3 is determined by the weight of the second guide rail 5 and the third guide rail 6.
It is customary to be supported on the body 1 by.

The present invention provides a sliding door device in which the door is slidable by at least one guide rail as described above, at the rear end of the opening 2 with respect to the direction in which the door 3 slides to close the opening 2. A rack is fixed at the lower end position D in a direction perpendicular to the sliding direction of the door 3, that is, in a direction perpendicular to the outer surface of the body 1 (direction perpendicular to the plane of FIG. A mechanical casing having a built-in dynamic gear device is movably disposed, and the above-mentioned gear is attached to one of the two large differential gears and the casing (or small gear shaft) that perform differential operation of the differential gear device. A drive shaft of a prime mover attached to the machine casing is rotatably connected, and a pinion gear that meshes easily with the drive shaft and a drive wheel that engages with a guide member provided on the door are fixed to the other two, respectively;
The door is swung outward by the drive torque of the prime mover transmitted to the pinion gear that is in mesh with the gear, and the door is swung outward along the outer surface of the door body 1 by the drive torque of the prime mover transmitted to the drive wheel. The sliding movement of the door is controlled by a single prime mover through differential action of the differential gear device.

Figures 3 and 4 show an embodiment of the present invention, with Figure 3 being a perspective view of the main parts thereof, and Figure 4 being a cross-sectional side view taken along the line of Figure 3. .

In this embodiment, a gear rotatably supported on a machine casing concentrically with a large differential gear of the differential gear device is connected to a casing of the differential gear device or a small gear shaft thereof, and rotates integrally. and rotatably connect the gear to the drive shaft of the prime mover,
According to an embodiment of the present invention, one large differential gear of the differential gear device is fixed to the pinion gear, and the other large differential gear is fixed to the drive wheel.

In the figure, on the upper surface of the floor plate 11 facing the opening 2 of the body 1, there is a substrate 1 formed into a hat-shaped cross section.
2, a linear rail piece 14 having a guiding edge 13 protruding from one upper edge thereof, and a guiding edge 16 formed with rack teeth 15 on one side and a guiding edge 16 on the other upper edge.
straight rack rods 17 having protruding shapes are arranged and fixed in parallel with their respective guiding edges 13, 16 facing outward and with their longitudinal directions substantially perpendicular to the outer surface of the body 1. . This track piece 14
On the upper surface of the rack rod 17, a bottomed cylindrical machine housing main body 18 is attached, and two guide rods 19, 19 having an L-shaped cross section and fixed to the bottom surface of the machine housing main body 18 are connected to the guide edge. 13 and 16, and is slidably mounted on the outer plate surface of the body in a substantially perpendicular direction.

A cylindrical sleeve 20 is formed in the center of the bottom plate of the machine casing body 18 concentrically with the machine casing body 18, and a first shaft 21 is rotatably supported on the sleeve 20 by a bearing. A second shaft 24 is rotatably supported by a bearing coaxially with the first shaft 21 in a shaft hole 23 formed in the center of a lid 22 that covers the top opening of the housing body 18. , first and second differential bevel gears 25 and 26, which constitute a differential gear device, are fixed to the upper end of the first shaft 21 and the lower end of the second shaft 24, respectively, so as to face each other. Differential large bevel gear 2
A small differential bevel gear 28 rotatably supported by a small gear shaft 27 via a bearing is meshed with the small gear shaft 27 and the large differential bevel gear shaft 25, 26, respectively.
26, and is rotatable in a plane perpendicular to the rotation center axis No. 26, thereby forming a differential gear device.

The sleeve 20 includes a first differential large bevel gear 2.
A bevel gear 30 is rotatably supported by a bearing concentrically with 5, and the bevel gear 30 meshes with a bevel gear 33 fixed to a drive shaft 32 of a motor 31 attached to the machine housing body 18. 3
1 rotation can be transmitted. The lower end of a hollow cylindrical support body 34 centered on the rotation center axis of the gear 30 is further fixed to the bevel gear 30, and a through hole 35 is formed at the upper end of the support body 34, so that the through hole 35 is formed in the upper end of the support body 34. The hole 35 supports or fixes the end of the pinion shaft 27 of the differential gear device that is far from the center of rotation. The motor 31 is thus transmitted to the bevel gear 30.
The rotational torque of is transmitted to the pinion shaft 27 via the support 34.
is transmitted to.

A pinion gear 36 is fixed to the lower end of the first shaft 21 on the same central axis as the first differential large bevel gear 25, and the upper end of the second shaft 24 has a cylindrical drive surface on its outer peripheral surface. A driving wheel 38 formed with a numeral 37 is fixed on the same central axis as the second large differential bevel gear 26. The pinion gear 36 is meshed with the rack teeth 15 of the rack lever 17, and when the driving torque of the motor 31 is transmitted to the first shaft 21, the machine housing consisting of the machine housing body 18 and the lid body 22 is locked. 17 and the rail rod 14. Further, a drive ring 39 made of an elastic material with a large coefficient of friction, such as rubber, is tightly fitted and fixed to the drive surface 37 of the drive wheel 38 as necessary, and is fixed to the lid 22 of the machine casing and is attached to one side of the machine casing. The circumferential surface of a roller 42 rotatably supported by a pin 41 installed at the tip of a plate 40 protruding from the top of the plate 40 is slightly different from the outer circumferential surface of the drive surface 37 of the drive wheel 38 or the drive ring 39. The rollers 4 are opposed to each other with a distance between them.
An engaging edge 51 of a guide member 50 fixed to the door 3, which will be described later, is engaged between the peripheral surface of the drive wheel 2 and the drive wheel 38.

The guide member 50 is molded from a metal plate, has a length covering almost the entire width of the door 3, and has a mounting edge 52 in the longitudinal direction and the engaging edge 51 substantially parallel to each other, and has the above-mentioned space between them. It is bent and formed so as to maintain a dimension larger than the diameter of the roller 42, and the bolt nut 54 is attached to the inner plate 53 of the door 3 via the mounting edge 52 with its longitudinal direction parallel to the sliding direction of the door 3.
It is fixed by. Therefore, when the drive torque of the motor 31 is transmitted to the second shaft 24, the door 3 is moved along the guide rail 4, by the rotational drive of the drive wheel 38.
5 and 6 in the front-rear direction along the outer plate surface of the body 1. If an elastic friction plate having a large friction coefficient, such as rubber, is fixed to the surface of the engagement edge 51 in contact with the drive wheel 38, the sliding of the door 3 will be further ensured. Note that 48 in the figure is a cover that covers the top surface of the lid 22 of the machine casing.

The operation of opening the door 3 from the state in which it closes the opening 2 in the device of the above embodiment will be described. When the opening 2 is closed, the door 3 is housed in the opening 2 so that its outer plate is substantially flush with the outer plate of the body 1, as shown by the solid line in FIG. In this state, current is passed through the motor 31 to
When one drive shaft 32 is rotated in the positive direction, rotational drive torque is transmitted to the first shaft 21 and the second shaft 24 via the bevel gears 33, 30 and the differential gear device. However, since the door 3 is housed in the opening 2 and the rollers 7 of the guide devices 8, 9, 10 are located at the curved parts of the guide rails 4, 5, 6, the door 3 can be slid along the outer panel of the body 1. There is a great deal of resistance to the rotation of the drive wheel 38 when trying to close the door 3 to the body 1.
There is extremely little resistance to the rotation of the pinion gear 36 as it tries to swing outward. Therefore, a differential movement occurs between the large differential bevel gears 25 and 26, and the second shaft 24
is rotated at a very low speed, the first shaft is rotated at a high speed in the same direction, the door 3 is rotated at a very low speed in a direction along the outer panel of the body 1, and at a high speed in a direction almost perpendicular to the outer panel, It is swung outward in the direction of synthesis. When the pinion gear 36 advances to near the tip of the rack rod 17, the guide devices 8, 9, 10 have one end engaged with the guide rails 4, 5, 6 and the other end locked with the door 3.
, the pinion gear 36 is stopped, and the first shaft 2 fixing the pinion gear 36 is
1 becomes unable to rotate, and the first differential large bevel gear 25 of the differential gear device stops, so the drive torque of the motor 31 transmitted from the bevel gear 30 to the differential gear device is exclusively used to drive the drive wheels 38 at high speed. The door 3 is swung outward from the outer panel of the body 1 and is slid along the guide rails 4, 5, 6 to fully open the opening 2. At this position, the door 3 is stopped by opening the switch of the motor 31 or stopping the motor by operating a limit switch.

To close the door 3 from the open position, the switch of the motor 31 is operated to reversely rotate the drive shaft 32. Contrary to the above, since the drive wheel 38 has a small resistance and the pinion gear 36 has a large resistance, the drive torque of the motor 31 is exclusively used to rotate the drive shaft 38 at high speed, and to move the door 3 in the opposite direction. slide. door 3
When the opening 2 is almost closed and the rollers 7 of the guide devices 8, 9, and 10 engage with the curved portion of the guide rail, the resistance of the pinion gear 36 decreases and the rotational speed of the first shaft 21 increases. The machine casing is raised and slid inward to the body 1 in a direction substantially perpendicular to the outer panel of the body 1. Due to the movement of the rack rod 17 and the rail rod 14 of the machine case along the length direction, the movement of the door 3 in the direction of being accommodated in the opening 2 is combined, and the door 3 reaches almost the same surface as the outer panel of the body 1. When retracted, the motor 31 is stopped by opening the switch or activating the limit switch.

That is, the driving torque of the motor 31 is
6 and the sliding movement of the door 3 due to the meshing of the rack teeth 15, and the engagement edge 5 between the drive wheel 38 and the guide member 50.
1, and a sliding motion approximately parallel to the body outer panel of the door 3 due to engagement with the door 1, but the driving torque of the motor is converted into either of these movements or a combined movement of both, and there is also some waste. do not have.

In this embodiment, instead of connecting the pinion shaft 27 of the differential gear device to the bevel gear 30 via the support 34, a casing for supporting the pinion shaft 27 is attached to each element of the differential gear device. Covering the casing and fixing the bevel gear 30 to the outer periphery of the casing, or
Alternatively, it is obvious that the bevel gear 30 may be carved on the outer periphery of the casing.

FIG. 5 shows another embodiment of the invention in a section similar to that of FIG. In this embodiment, a gear rotatably supported on the machine casing concentrically with the large differential gear of the differential gear device is fixed to one of the large differential gears, and the gear is used to drive the prime mover. According to an embodiment of the present invention, the pinion gear is rotatably connected to a shaft, the other of the large differential gears is fixed to the drive wheel, and the pinion gear is fixed to a casing of the differential gear device or a pinion shaft thereof. It is something.

In the figure, parts given the same reference numerals as in FIG. 4 indicate the same parts. A circular shaft hole 120 is concentrically bored in the center of the bottom plate of the machine housing body 18, and the first shaft 21 is rotatably supported in the shaft hole 120 by a bearing, and the bevel gear 30 and differential The first differential large bevel gear 25 of the dynamic gear device is fixed concentrically and is connected to the first differential bevel gear 25 through a bearing.
The bevel gear 33 is rotatably supported on the shaft 21 of the motor 31 and is attached to the drive shaft 32 of the motor 31.
The rotational torque of the motor 31 is transmitted to the first differential large bevel gear 25 of the differential gear device. The upper end of the first shaft 21, which has a pinion gear 36 fixed to its lower end, is fixed to a pinion shaft 27 of a differential gear device on its rotation center axis. The other configurations are the same as in FIG. 4.

In the above embodiment device, the rotational torque of the motor 31 is applied to the first differential large bevel gear 25 of the differential gear device.
The torque is divided between the second large differential bevel gear 26 and small gear shaft 27, which together with the first large differential bevel gear 25 constitute a differential gear device, and the external force applied to the drive wheels 38 is transmitted to the drive wheels 38. When the resistance of When the resistance of the external force to the pinion gear 36 is large, the main part of the torque is transmitted to the drive wheel 38 via the second shaft 24 fixed to the second large differential bevel gear 26, and the main part of the torque is transmitted to the drive wheel 38. The sliding motion is mainly parallel to the outer surface of the body skin, and torque is not wasted even if the sliding movement is rough.

FIG. 6 shows yet another embodiment of the present invention in a section similar to that of FIG. In this embodiment, a gear disposed coaxially with the large differential gear is fixed to one of the large differential gears, and the gear is rotationally connected to the drive shaft of the prime mover, and the large differential gear is connected to the drive shaft of the prime mover. The other is fixed concentrically to the pinion gear, and the drive shaft is integrally formed or fixed to the casing or pinion shaft of the differential gear device so as to rotate about the rotation center axis of the machine casing. This is an embodiment of the present invention.

In the figures, parts given the same reference numerals as in FIGS. 4 and 5 indicate the same parts. A circular shaft hole 220 is concentrically bored in the center of the bottom plate of the machine housing body 18, and a first shaft 2 is inserted into the shaft hole 220.
1 is rotatably supported by a bearing, and a first differential bevel gear 25 of a differential gear device is mounted on the shaft 21.
are fixed concentrically. The motor 31 is attached to the lid 222 of the machine case, and the lid 222 has a second
A shaft 224 is supported by a bearing so as to be coaxial with the first shaft 21, and a spur gear 230 is concentrically mounted on the shaft 224 together with a second differential bevel gear 26 of the differential gear device. A drive shaft 232 of the motor 31 extends parallel to the second shaft 224, and a spur gear 233 attached to the second shaft 232 meshes with the spur gear 230, so that the drive torque of the motor 31 is differentiated. Second differential large bevel gear 26 of the dynamic gear device
It is intended to be communicated to The drive wheel 238 is formed into an annular shape, and is fixed to the outer end of the pinion shaft 227 of the differential gear device in the rotating plane, and is connected to the first and second shafts 2.
1,224 center axis. A driving surface 237 is formed on the outer circumferential surface of the driving wheel 238, and is engaged with the engagement edge 51 of the guide member 50 by the driving surface 237 or the driving ring 39 tightly fitted onto the surface 237. The rotor 42 is rotatably supported by a pin 41 set up in a plate 240 fixed to an extension of the bottom plate of the machine housing body 18. In the illustrated embodiment, the first
The center of rotation of a small gear shaft 227 is rotatably supported at the upper end of the shaft 21 of the gear.

In the above embodiment device, the rotational torque of the motor 31 is transferred to the second differential large bevel gear 26 of the differential gear device.
The torque is divided between the first differential bevel gear 25 and the pinion shaft 227, which together with the second differential bevel gear 26 constitute a differential gear device, and is transmitted to the driving wheels 238. When the resistance of external force is large, the main part of the torque is transmitted to the pinion gear 36 via the first differential large bevel gear 25, and the movement is mainly converted to swing the door 3 to the outside of the body outer plate. When the resistance of the external force to the gear 36 is large, the main part of the torque is transmitted to the drive wheel 238 via the small gear shaft 227, and the torque is mainly converted to sliding approximately parallel to the outer surface of the outer body panel of the door 3. It is something that should not be wasted.

In this embodiment, when the differential gear device is housed in a casing and installed in a machine casing, the first and second large differential bevel gears 25, 2 of the differential gear device are
The casing is rotatably supported by the machine casing body 18 and the lid body 222 about the rotation center axis of the differential gear device, and the first and second large differential bevel gears 25 and 26 are mounted on the casing of the differential gear device. The small gear shaft is rotatably supported by the shaft, and the small gear shaft is supported by the casing at the end outward from the center of rotation, and the pinion gear 36 is fixed concentrically to the shaft of the differential large bevel gear 25. A spur gear 230 is fixed to the shaft of the large differential bevel gear 26, and a driving wheel is integrally formed with the casing, or an annular driving wheel 238 is fixed to the large differential bevel gear. It is quite obvious that the same effect as in the above embodiment can be achieved even if the rotation center shafts 25 and 26 are rotated.

As described above in detail, the present invention includes a wall having an opening, a door for closing the opening, and at least one guide rail attached along the wall in the opening direction of the door. and a guide device attached to the door and slidable on the guide rail, so that one side of the door is substantially flush with one side of the wall when the door closes the opening. In a sliding door that is stored and guided to slide approximately parallel to the side surface of the wall by the guide device when the door is opened, a guide member is fixed to the other side surface of the door parallel to the sliding direction of the door, A rack is fixed to the wall in a fixed position substantially perpendicular to the sliding direction of the door, and the machine casing is movable along the rack almost perpendicular to the sliding direction of the door. Two large differential gears rotatably arranged opposite to each other and a small differential gear that meshes with these large differential gears are rotatably supported and centered around a central axis of rotation of the large differential gears. A differential gear device consisting of a rotating small gear shaft is disposed, and two large differential gears and three small gear shafts of the differential gear device are provided.
one of them is rotatably connected to the drive shaft of the prime mover attached to the machine casing, and the other two have a pinion gear on one side and a drive surface on the other side. The wheels are mounted so that their rotation center axes are the same, and the drive surface of the drive wheel is engaged with a guide member fixed to the door, and the pinion gear is easily engaged with the drive wheel, so that the drive wheel is not transmitted to the drive wheel. The drive torque of the prime mover causes the door to slide in a direction along the wall via the guide member, and the drive torque of the prime mover transmitted to the pinion gear causes the machine casing to move in a direction substantially perpendicular to the wall. Since the drive torque of the prime mover is divided and transmitted to both the pinion gear and the drive wheel via the differential gear system, the door is moved in a direction almost perpendicular to the wall by the rotation of the pinion gear. The door is forced to move in the direction of the combination of these forces by both the force that causes the door to move in the direction parallel to the wall and the force that causes the door to move in a direction approximately parallel to the wall due to the rotation of the drive wheels. It is guided and slid by. In particular, when the door encounters great resistance in the direction of sliding along the wall, such as the initial movement when opening the door from a closed state, or the final movement when closing the opening from an open state, the pinion Since the main part of the drive energy of the prime mover is converted to movement in a direction almost perpendicular to the wall of the machine casing due to the meshing of the gear and the rack, the outer surface of the door is placed in the opening so that it is almost flush with the outer surface of the wall. Sliding doors for storage have the feature that swinging out of the door is carried out extremely reliably by a single prime mover, and the single direction rotation of the single prime mover allows the door to swing out regardless of the shape of the guide rail. It is capable of completing one-way sliding, opening or closing.

In addition, in the present invention, by appropriately selecting the diameter of the drive wheel and the gear ratio of the rack and pinion gears, the speed ratio of swinging and sliding of the door can be appropriately selected. The design can be changed to mechanical opening and closing using the same design.

[Brief explanation of drawings]

FIG. 1 is a side view of a van-type automobile equipped with a sliding door, and FIG. 2 is a schematic diagram showing the sliding state of the guide rail and the door. 3 to 6 show embodiments of the present invention, FIG. 3 is a perspective view of essential parts of one embodiment, and FIG. 4 is a cross-section of the embodiment along the line of FIG. 3. 5 and 6 show other embodiments of the present invention, each showing a cross-sectional view similar to FIG. 4. In the figure, 1 is the body, 2 is the opening, 3 is the door,
4, 5, and 6 are guide rails, 8, 9, and 10 are guide devices, 17 is a rack rod, 18 is a main body of the machine, 22 is a lid thereof, 21, 24 are shafts, 25, 26 are large differential gears, 27 is a pinion shaft, 28 is a differential pinion, 3
0,230 is a gear, 31 is a prime mover, 36 is a pinion gear, 38 is a drive wheel, 37 is a drive surface thereof, 42
50 is a roller, 50 is a guide member, and 51 is an engaging edge thereof.

Claims (1)

[Scope of Claims] 1. A wall in which an opening is formed, a door to close the opening, at least one guide rail attached to the wall along the opening direction of the door, and a door for closing the opening. a guide device attached to the guide rail and slidable on the guide rail; the guide device is housed so that when the door closes the opening, one side of the door is substantially flush with one side of the wall; In a sliding door that is slid and guided approximately parallel to the side surface of the wall by the guide device when opening, a guide member is fixed to the other side surface of the door in parallel to the sliding direction of the door, and the guide member is fixed to the other side of the door in parallel with the sliding direction of the door, A rack is fixed at a fixed position substantially perpendicular to the sliding direction of the door, and the machine casing is movable along the rack almost perpendicular to the sliding direction of the door. A small gear that rotatably supports two large differential gears disposed as a main differential gear and a small differential gear that meshes with these large differential gears, and that rotates around a central axis of rotation of the large differential gear. a differential gear device consisting of a shaft, and one of two differential gears and a small gear shaft, which are rotatable concentrically and differentially in the differential gear device, is connected to the machine casing. The drive wheel is rotatably connected to the drive shaft of the prime mover attached to the motor, and the other two have a pinion gear on one side and a drive wheel with a drive surface formed on the circumference on the other. A guide member attached to the same axis and fixed to the door is engaged with the drive surface of the drive wheel, and the pinion gear is meshed easily, so that the driving torque of the prime mover transmitted to the drive wheel is used. The door is slid in a direction along the wall via a guide member, and the machine casing is moved in a direction substantially perpendicular to the wall by the driving torque of the prime mover transmitted to the pinion gear. Sliding door opening/closing device. 2. Two large differential gears of the differential gear device are rotatably supported on the machine casing, and a gear that is rotatably supported on the machine casing concentrically with the large differential gear is the differential gear. The small gear is connected to the casing of the device or the small gear shaft so as to be rotatable together, and the gear is rotationally connected to the drive shaft of the prime mover, one of the large differential gears is fixed to the pinion gear, and the The sliding door opening/closing device according to claim 1, wherein the other of the large differential gears is fixed to the drive wheel. 3. One of the large differential gears of the differential gear device is rotatably supported by the machine casing, the pinion gear is concentrically fixed to the rotating shaft, and the gear is fixed coaxially to the large differential gear. A hollow cylindrical support body is rotatably supported by the machine casing, and a gear attached to the drive shaft of the prime mover is meshed with the gear, and a hollow cylindrical support body having an inner diameter larger than the outer diameter of the large differential gear is fixed to the gear. At least a small gear shaft of the differential gear device is pivotally supported on the support body, and the other large differential gear of the differential gear device is rotatably supported on the machine casing, and the drive shaft is supported on the rotating shaft. The sliding door opening/closing device according to claim 1 or 2, characterized in that the rings are fixed concentrically. 4. One of the large differential gears of the differential gear device is rotatably supported on the machine casing, the pinion gear is fixed concentrically to the rotating shaft, and the other large differential gear is supported on the machine casing. The differential gear is rotatably supported around a rotation center shaft, the drive wheel is concentrically fixed to the rotation shaft, and the pinion shaft of the differential gear device supports an end portion of the pinion shaft outside the rotation center. A gear according to claim 1 or 2, characterized in that a gear is formed or fixed on the outer periphery of a casing of the dynamic gear device, and the gear is meshed with a gear attached to a drive shaft of the prime mover. Sliding door opening/closing device. 5. Two large differential gears of the differential gear device are rotatably supported on the machine casing, and a gear rotatably supported on the machine casing concentrically with the large differential gear is the differential gear. The gear is fixed to one of the large differential gears of the device, and the gear is rotationally connected to the drive shaft of the prime mover, the other of the large differential gears is fixed to the drive wheel, and the small gear of the differential gear device is fixed to one side of the large differential gear. The sliding door opening/closing device according to claim 1, wherein the pinion gear is fixed to a shaft. 6. The pinion gear shaft of the differential gear device is supported coaxially with the rotation center of the machine casing by a rotating shaft fixed perpendicularly to the shaft, and the pinion gear is fixed to the rotating shaft, and the pinion gear is fixed to the rotating shaft. One of the large differential gears of the differential gear device is rotatably supported, the other of the large differential gears is rotatably supported by the machine casing, and the drive wheel is fixed concentrically to the small gear. A gear is rotatably supported concentrically on a rotating shaft whose shaft is supported on a machine casing, and the gear is fixed concentrically to one of the large differential gears and meshed with a gear attached to the drive shaft of the prime mover. The sliding door opening/closing device according to claim 1 or 5, characterized in that: 7. Two large differential gears of the differential gear device are rotatably supported by the machine casing, and a gear disposed coaxially with the large differential gear is fixed to one of the large differential gears, and , the gear is rotationally connected to the drive shaft of the motor, the other of the large differential gears is concentrically fixed to the pinion gear, and the small gear shaft of the differential gear unit connects the drive wheels to the motor. The sliding door opening/closing device according to claim 1, wherein the sliding door opening/closing device is supported at an end portion outward from the rotation center of the housing so as to rotate around the rotation center axis of the housing. 8. One of the large differential gears of the differential gear device is rotatably supported by the machine casing, and a gear is fixed concentrically to the rotating shaft and meshed with a gear attached to the drive shaft of the prime mover; The other large differential gear is rotatably supported by the machine casing about the central axis of rotation of the one large differential gear, and the pinion gear is coaxially fixed to the rotating shaft of the large differential gear, Claim 1, characterized in that the drive wheel is supported at an end portion outside the rotation center of the small gear shaft of the differential gear device so as to rotate about the rotation center axis of the machine casing. The sliding door opening/closing device according to item 7 or 7. 9. Two large differential gears of the differential gear device are rotatably supported by their rotating shafts, and the differential gear device is covered with a casing that supports an end of a small gear shaft, and the casing is attached to the differential gear device. The large differential gear is rotatably supported by the machine casing about the central axis of rotation, one rotating shaft of the differential large gear is rotationally connected to the drive shaft of the prime mover, and the differential large gear is rotatably supported by the machine casing. fixing the pinion gear to the other rotating shaft;
A patent characterized in that the driving wheel is integrally formed or an annular driving wheel is fixed to the casing of the differential gear device, so that the driving wheel is rotated about the central rotation axis of the casing. A sliding door opening/closing device according to claim 1 or 7. 10. Claims 1 and 2, characterized in that the drive surface of the drive wheel is an elastic drive ring with a large friction coefficient, and is frictionally engaged with the engagement edge of the guide member. The sliding door opening/closing device according to any one of Item 5 and Item 7. 11 A patent claim characterized in that the engagement edge of the guide member that engages with the drive surface of the drive wheel is an elastic friction plate with a large friction coefficient, and is frictionally engaged with the drive surface of the drive wheel. Range 1st term, 2nd term,
The sliding door opening/closing device according to any one of Item 5 and Item 7. 12 The drive surface of the drive wheel is an elastic drive ring with a large friction coefficient, the engagement edge of the guide member with which the drive surface of the drive wheel engages is an elastic friction plate with a large friction coefficient, and The slide according to any one of claims 1, 2, 5, and 7, characterized in that a drive ring of a drive wheel is frictionally engaged with a friction plate of the guide member. Door opener.