JP2000062466A - Support structure of slide door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely open and close a slide door by operation of a door handle by providing a two-way clutch mechanism having a means for locking rotation of a rolling ring between the rolling ring and a support shaft and a means for releasing the lock state interlocking with the operation of the door handle of the slide door. SOLUTION: A rolling ring unit X with a two-way clutch is fitted to a support shaft of a slide door. A locking means is formed by a cam face 6, a circumferential face 2a and a roller 3 disposed between them, and a lock releasing means is formed by a positioning means 14 comprising an engaging projection part 9 of a retainer 4 and a retainer fixing groove 7 of an inner ring 1 and the retainer 4. ON/OFF switching of external force F applied to the retainer 4 for switching between an operation mode being free in the normal and reverse directions and a normal mode of locking in the normal and reverse directions is performed interlocking with the operation of a door handle. Thus, the slide door can be freely opened and closed, and fixed in an arbitrary position by operation and opening of the door handle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a slide door attached to the body of an automobile or the like.

[0002]

2. Description of the Related Art For example, in a cab-over type automobile, a slide door system is often adopted as a means for opening and closing an entrance / exit provided on a side surface of a vehicle body. Normally, there are three guide rails, an upper rail, a lower rail, and a rear center rail, provided on the vehicle body side, and rolling wheels (support wheels, guide wheels) are freely rotatable on the slide door side corresponding to each of these guide rails. Mounted. Then, the slide door is mounted on the guide rail of the vehicle body through the rolling wheels, and slides along the guide rail in the front-rear direction of the vehicle body as the passenger opens and closes the door. When sliding
The sliding movement of the rolling wheels rotatably supported on the sliding door side smoothly guides and supports the sliding movement of the sliding door.

[0003]

For example, when a vehicle is parked on a slope or the like and the sliding door is opened or closed, if the hand is released from the door in the half-opened state, the door will be in the fully open side or fully closed against the intention of the occupant. It may slide to the side due to its own weight.

The present invention is intended to eliminate the above-described operational inconvenience in a sliding door.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a guide rail for a main body by a guide rail provided on the main body and a rolling wheel rotatably supported by the slide door. In a support structure of a slide door slidably supported along at least one of the rolling wheels to which at least the load of the slide door is applied and the support shaft provided on the slide door, both the forward and reverse directions with respect to the supporting shaft of the rolling wheels are always provided. Lock means for locking the rotation of the sliding door and lock releasing means for releasing the locked state by the locking means in conjunction with the operation of the door handle of the slide door and freeing the rotation of the rolling wheels in both the forward and reverse directions with respect to the support shaft. A configuration provided with a two-way clutch mechanism is provided.

In the above structure, the "main body" differs depending on the object on which the slide door is mounted. For example, when the object is an automobile, the body of the automobile corresponds to the "main body".

[0007] For example, in a supporting structure of a sliding door of an automobile, etc., as "rolling wheels", a supporting wheel (supporting roller) that mainly supports the load of the sliding door and a guiding wheel (guide roller) that mainly guides sliding movement. ) And often used together. In this example, the "rolling wheel to which the load of the slide door is applied" corresponds to the supporting wheel. Since it is "at least", it can be applied to the guide wheel. However, the support structure that uses only the support wheels (does not use the guide wheels) is not excluded.

The "two-way clutch mechanism" has two modes: forward and reverse bidirectional rotation lock of the rolling wheels and forward and reverse bidirectional rotation free. The normal mode is forward / reverse bidirectional rotation lock, and the operation mode is forward / reverse bidirectional rotation free. Switching between the normal mode and the operation mode can be performed by turning ON / OFF the lock releasing means. The ON / OFF of the unlocking means is performed in conjunction with the operation of the door handle of the sliding door. When the door handle is operated, the unlocking means is ON (operation mode), and when not operating, the unlocking means is OFF (continuous mode). become. Therefore, when the door handle is operated (operation mode), the rotation of the rolling wheels becomes free in both forward and reverse directions, and the sliding door can be opened and closed. When the hands are released from the door handle (continuous mode), the rolling wheels The rotation of is locked in both forward and reverse directions,
Even if the sliding door is half-open, it stays in that position and does not move.

The two-way clutch mechanism as described above is provided "between the rolling wheel and the support shaft provided on the slide door", but this is a two-unit structure as a unitary structure.
When a directional clutch is installed between the rolling wheels and the support shaft,
Both the case where at least one of the rolling wheel and the support wheel is a constituent element of the two-way clutch mechanism is included.

In the above-mentioned structure, the lock means of the two-way clutch mechanism is formed by the rolling wheels, the support shaft or the inner ring fixed to the support shaft, and the engaging element interposed between the rolling wheels. A wedge is used as the lock releasing means, and a retainer for controlling the position or posture of the engaging element in the rotational direction and the rotational position of the retainer are interlocked with the operation of the door handle so that the engaging element moves in both forward and reverse directions. It can be configured by a positioning means for holding the neutral position which is separated from the wedge. Following the rotation of the rolling wheels, the engagement element engages with the wedges in both the forward and reverse directions, whereby the forward and reverse rotations of the rolling wheels are automatically locked. Further, the retainer is held at the neutral position, and the engagement element is disengaged from the wedges in both the forward and reverse directions, whereby the locked state is released.

As the "engager", one having a circular cross section such as a roller or a ball, or one having a non-circular cross section such as a sprag can be used. When using an engaging element having a circular cross section such as a roller or a ball, one of the rolling wheel and the support shaft (or inner ring) is provided with a circumferential surface, and the other is provided with a cam surface. An engaging element is arranged between the surface and the surface. When the engaging element is held at the disengaged position of the cam surface, it is to be disengaged from the wedges in both the forward and reverse directions.For example, the cam surface has a deep central portion in the rotational direction and is gradually shallowed toward both sides. This can be achieved by a configuration in which the clearance between the cam surface and the circumferential surface at the center of the cam surface, which is the disengaged position, causes a slight clearance with respect to the diameter of the engagement element. The engagement element wedge-engages with both the rolling wheel and the support shaft (or the inner ring) when the engagement element moves to the shallow side of the cam surface. When using sprags or other engaging elements with a non-circular cross section, circumferential surfaces are provided on both the rolling wheels and the support shaft (or inner ring), cam elements are provided on the engaging elements, and the engaging elements are arranged between the circumferential surfaces. To do. The engager shall be disengaged from the wedges in both the forward and reverse directions when it is held in the neutral position, and this may be achieved by, for example, in the neutral position of the engager, creating a slight clearance with the circumferential surface. You can The engaging element is
When the posture changes in the direction of rotation, it engages with both the rolling wheel and the support shaft (or the inner ring) in a wedge manner.

The "positioning means" may be a concave-convex engaging portion provided between the cage and either one of the rolling wheel and the support shaft (or the inner ring). When the door handle is not operated, the concave-convex engagement portions are loosely meshed with each other to allow relative movement within a predetermined range in the rotation direction of the cage, and the cage is closely meshed with each other in conjunction with the operation of the door handle to lock the cage. It shall be held in the neutral position. In the state where relative movement within a predetermined range in the rotation direction of the cage is allowed,
The engaging element can engage with the wedges in both the forward and reverse directions. Further, in the state where the cage is held at the neutral position, the engagement element is disengaged from the wedges in both the forward and reverse directions.

The engaging operation of the engaging element with the wedge in both the forward and reverse directions is as follows.
The frictional force associated with the rotation of the rolling wheels (the frictional force between the engagement element and the rolling wheel, or the frictional force between the engagement element and the support shaft or the inner ring) can be used. By utilizing the relative movement in the rotation direction, the above-described engagement operation can be made more reliable. When using an engaging element having a circular cross section such as a roller or a ball, the engaging element becomes shallower on both sides of the cam surface, more specifically, on both sides of the cam surface by the relative movement of the retainer in the rotation direction. Push it to the part. When an engaging element having a non-circular cross section such as a sprag is used, the attitude of the engaging element is changed in a direction in which a wedge is formed in both forward and reverse directions by relative movement of the retainer in the rotational direction. The operation of such a retainer is performed by, for example, interposing an elastic body that generates a predetermined frictional force between one of the rolling wheels and the support shaft (or the inner ring) and the retainer, and holding the retainer. This can be achieved by rotating the cage with the rolling wheels or by stopping the cage with the support shaft (or the inner ring).

In order to simplify and downsize the support structure, rolling bearing means can be provided together with a two-way clutch mechanism between the rolling wheel and the support shaft, and the rolling wheel can also have a two-way clutch mechanism. The clutch outer ring of the mechanism can also serve as the bearing outer ring of the rolling bearing means.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to a supporting structure for a sliding door of an automobile will be described below.

FIG. 1A shows a cab-over type automobile, and FIG. 1B shows a sliding door mounted on the automobile. Usually, the upper rail 31, the lower rail 32, and the rear center rail 33 are provided around the entrance on the side surface of the vehicle body 30.
3 guide rails are attached, and rolling wheels (support wheels) 35, 2 and 37 are attached to the slide door 34 corresponding to each of these guide rails (the guide wheels are not shown). The slide door 34 is mounted on the guide rails 31, 32, 33 of the vehicle body 30 via the rolling wheels 35, 2, 37, and the guide rail 31,
It slides in the front-back direction of the vehicle body 30 along 32 and 33. During the sliding movement, the rolling movement of the rolling wheels 35, 2 and 37 mounted on the sliding door 34 side smoothly guides and supports the sliding movement of the sliding door 34.

Rolling wheels 35 and 37 mounted on the upper rail 31 and the rear center rail 33 are rotatably supported by support shafts 38 and 39 provided on a slide door 34, respectively. In this embodiment, rolling bearings such as ball bearings are fitted to the support shafts 38 and 39, and the bearing outer rings are used as the rolling wheels 35 and 37.

The rolling wheel 2 mounted on the lower rail 32 is
The support shaft 20 provided on the slide door 34 is rotatably supported. In this embodiment, a two-way clutch-equipped rolling wheel unit X in which the rolling wheel 2, a two-way clutch, and a rolling bearing, for example, a ball bearing are unitized is fitted to the support shaft 20. In this rolling wheel unit X,
The rolling wheel 2 serves both as a clutch outer ring and a bearing outer ring.

2 and 3 are fitted to the support shaft 20 of the slide door 34 (mounted on the lower rail 32).
The rolling wheel unit X with a direction clutch is shown. The rolling wheel unit X includes an inner ring 1 fitted and fixed to a support shaft 20, a rolling wheel 2 rolling on a lower rail 32, a roller 3 as an engaging member having a circular cross section, and a holding holding the roller 3. The container 4 and the ball 3a as a rolling element are the main constituent elements, and a locking means 12 and an unlocking means 13 described later are provided.

As shown in FIG. 4, on the outer peripheral surface of the inner ring 1,
A plurality of cam surfaces 6 are provided at equal intervals around the circumference, and the raceway surface 1 of the ball 3a is axially separated from the area where the cam surfaces 6 are formed.
b is provided. Each cam surface 6 is formed such that the central portion in the circumferential direction is deep and gradually shallows toward both sides, and has a substantially V-shaped cross section. The cam surface may be linear as shown in FIG. 5 (A) or may be curved as shown in FIG. 5 (B) such as a concave arc. The V-shaped opening angle α of the cam surface 6 is, for example, 1
It is set to 55 ° to 175 °.

Further, cage fixing grooves 7 are provided at a plurality of positions in the circumferential direction on the outer peripheral surface of the end portion of the inner ring 1 on the side where the cam surface 6 is formed. For example, the retainer fixing groove 7 is formed on the cam surface 6
And are provided alternately. The cage fixing groove 7 has a cross-sectional shape in which the central portion of the groove width is deep, and in this example, has a substantially V-shaped cross-sectional shape. The cam surface 6 has a V-shaped inclination.
It has a steeper slope than.

As shown in FIGS. 2 and 3, on the inner circumference of the rolling wheel 2, there are a circumferential surface 2a facing the cam surface 6 of the inner ring 1 and a raceway surface 2b facing the raceway surface 1b of the inner ring 1. It is provided. Rollers 3 are arranged between each cam surface 6 of the inner ring 1 and the circumferential surface 2a of the rolling wheel 2, and are held by a cage 4. The cam surface 6, the circumferential surface 2a, and the roller 3 arranged therebetween form the locking means 12. Further, a plurality of balls 3a are arranged between the raceway surface 1b of the inner ring 1 and the raceway surface 2b of the rolling wheel 2 and are held by the cage 4a. Thereby, rolling bearing means is constituted.
In this example, the rolling wheel 2 is formed narrower than the inner ring 1 so that the outer peripheral surface of the retainer 4, which will be described later, on the side of the engaging projection 9 is exposed.

As shown in FIG. 6, the cage 4 is formed in an annular shape, window-shaped pockets 8 for accommodating the rollers 3 are formed at a plurality of circumferential positions, and each cage of the inner ring 1 is formed. Engaging protrusions 9 that mesh with the fixing grooves 7 and spring fixing pins 10 are provided at a plurality of positions in the circumferential direction. The engagement protrusion 9 is provided on the inner peripheral surface of the cage 4 and has a triangular chevron shape. The spring fixing pin 10 is provided on the end surface of the cage 4 on the side opposite to the end surface on the side of the engaging protrusion 9. With the engaging protrusion 9 of the cage 4 and the cage fixing groove 7 of the inner ring 1,
The positioning means 14 is configured. Further, the positioning means 14 and the cage 4 constitute the lock releasing means 13.

FIG. 7 shows a state in which the elastic body 5 is attached to the cage 4. The elastic body 5 includes a ring-shaped side plate 5a,
Arm-shaped spring pieces 5b extending radially from the side plate 5a.
It is composed of a leaf spring. The spring piece 5b is the side plate 5
It extends obliquely to the outside diameter side from a and is bent so that its tip portion is substantially parallel to the axial direction, and the tip portion elastically contacts the inner peripheral surface of the rolling wheel 2. The elastic body 5 is the retainer 4
The spring fixing pin 10 provided on the side plate 5a is inserted into the hole of the side plate 5a and is caulked to be fixed to the cage 4. In addition to caulking, the elastic body 5 may be fixed by welding, screwing, tacking, bonding, or the like.

The elastic body 5 may be any one as long as it has a function of allowing the cage 4 to rotate with a constant frictional force in accordance with the rotation of the rolling wheels 2. An elastic body such as rubber is used in addition to the spring member. May be. For example, a ring-shaped elastic body such as an O-ring is fitted to the outer peripheral surface of the cage 4 and is elastically brought into contact with the inner peripheral surface of the rolling wheel 2, or the inner peripheral surface of the rolling wheel 2 is O-shaped. A ring-shaped elastic body such as a ring may be fitted and brought into elastic contact with the outer peripheral surface of the cage 4. Instead of the O-ring,
A wire spring or a leaf spring bent in a wave shape may be used. Alternatively, an elastic body is locally embedded on the outer peripheral surface of the cage 4 and is elastically contacted with the inner peripheral surface of the rolling wheel 2, or the elastic body is locally arranged on the inner peripheral surface of the rolling wheel 2. It may be embedded and may be elastically brought into contact with the outer peripheral surface of the cage 4. Further, instead of disposing the elastic body, the cage 4 may be formed in a polygonal shape, or a convex portion may be provided on the outer peripheral surface of the cage 4, so that a plurality of circumferential locations of the cage 4 are formed on the rolling wheels 2. It is also possible to obtain a constant frictional force such that the retainer 4 itself contacts the inner peripheral surface thereof, and the retainer 4 itself follows the rolling wheels 2 and is accompanied by them.

In FIG. 8A, in the natural state, the cage 4 is located at the neutral position in the rotational direction, and the roller 3 is in the cam surface 6.
It shows the state when it is located in the central part (disengagement position) of. At this time, the engaging projection 9 of the cage 4 and the cage fixing groove 7 of the inner ring 1 are in phase with each other in the rotational direction, and there is a rotational gap and a radial gap between them. Also,
The distance between the central portion of the cam surface 6 of the inner ring 1 and the circumferential surface 2a of the rolling wheel 2 is set to a dimension that creates a radial clearance with respect to the diameter of the roller 3. Further, the pocket 8 of the cage 4 for accommodating the roller 3 has a very small gap in the rotational direction with the roller 3 (for example, 1% or less of the diameter of the roller 3) or has a negative gap. Is designed.

FIG. 8B shows a state in which a predetermined external force F is applied to the cage 4 and the cage 4 is held at the neutral position. When the cage 4 is pressed from the outer diameter side in the radial direction by the external force F, the pressed portion of the cage 4 is elastically deformed to the inner diameter side, and the engaging projection 9 thereof closely meshes with the cage fixing groove 7. .
As a result, there is no gap in the rotational direction between the engaging projection 9 and the retainer fixing groove 7, and the retainer 4 is retained in the rotational direction with respect to the inner ring 1 in the state of being positioned at the neutral position. . As a result, all the rollers 3 are held at the center of the cam surface 6, and the rotation of the rolling wheels 2 becomes free in both forward and reverse directions.
The rotation of the rolling wheel 2 with respect to the inner ring 1 at this time is rotatably supported by a plurality of balls 3a interposed between the raceway surface 1b of the inner ring 1 and the raceway surface 2b of the rolling wheel 2. The portion of the cage 4 that is pressed by the external force F is preferably a portion equally divided into 2 to 4 in the circumferential direction.

When the rolling wheels 2 rotate with respect to the inner ring 1 from the state shown in FIG. 8A, the cage 4 rotates following the rotation of the rolling wheels 2 due to the frictional force of the elastic body 5. As a result, the roller 3 held in the pocket 8 of the cage 4 is pushed by the cage 4 to the shallow side of the cam surface 6, and wedge-engages with both the cam surface 6 and the circumferential surface 2a. As a result, the rolling wheel 2 is rotated in a small rotation angle and then locked in that direction. For example, as shown in FIG. 9 (A), when the rolling wheels 2 rotate clockwise, the cage 4 follows the rolling wheels 2 and rotates clockwise, and the rollers 3 are pushed by the cage 4. The cam surface 6 and the circumferential surface 2a are wedge-engaged in the clockwise direction. Therefore, the rolling wheel 2 is locked clockwise after rotating by a small rotation angle. At this time, the engaging protrusion 9 of the cage 4 and the cage fixing groove 7 of the inner ring 1 are set to have dimensions that do not interfere with each other. As shown in FIG. 9B, when the rolling wheels 2 rotate counterclockwise, the cage 4
Follows the rolling wheel 2 and rotates counterclockwise, and the roller 3 is pushed by the retainer 4 and wedge-engages counterclockwise with both the cam surface 6 and the circumferential surface 2a. Therefore, the rolling wheel 2 is locked in the counterclockwise direction after rotating by a small rotation angle.
At this time, the engaging protrusion 9 of the cage 4 and the cage fixing groove 7 of the inner ring 1 are set to have dimensions that do not interfere with each other. As described above, when the external force F is not applied, the rolling wheels 2 are automatically locked in both forward and reverse directions. When the roller 3 is engaged with the wedge, the angle β formed by the roller 3 and the contact point between the cam surface 6 and the circumferential surface 2a is 5 to 25 ° {180 °-
(155 ° to 175 °), which is half of this angle (β /
2) is known as a general clutch strat angle.

Switching between the state (operation mode) shown in FIG. 8B and the state (continuous mode) shown in FIG. 9 is performed by ON / OFF switching of the external force F applied to the retainer 4, and the switching is performed as shown in FIG. It is performed in conjunction with the operation of the door handle 40 shown in FIG. That is, the operation of the door handle 40 and the operation of the ON / OFF operation mechanism of the external force F (not shown) are related by the cable wire 41 (see FIG. 1), an electric signal, or the like, and when the door handle 40 is operated, , The cable wire 41, an electric signal, or the like actuates the above-mentioned operation mechanism, and external force F is applied to the retainer 4 to
The operation mode shown in (B) (both normal and reverse directions free) is entered.
On the other hand, when the door handle 40 is released, the external force F generated by the operating mechanism disappears, and the normal mode (forward / reverse bidirectional lock) shown in FIG. 9 is entered. Therefore, the door handle 4
When 0 is operated, the rotation of the rolling wheels 2 in both the forward and reverse directions becomes free, so that the sliding door 34 can be freely slid and opened, and when the hand is released from the door handle 40, the rolling wheels 2 can rotate in both the forward and reverse directions. When the rotation of the slide door 34 is locked, the slide door 34 is fixed in that position even if it is in the half-opened state and cannot move.

FIGS. 10 and 11 show an embodiment in which the above-mentioned two-way clutch-equipped rolling wheel unit X is provided with an operating member 16 for ON / OFF operation of the external force F. Operation member 1
Reference numeral 6 is a ring-shaped member having a lever portion 16a in a part in the circumferential direction, and is rotatably fitted to the outer peripheral surface of the support shaft 20. The inner ring 1 is fitted and fixed to the small diameter portion of the support shaft 20 slightly apart from the step surface 20a between the small diameter portion and the large diameter portion, and the end surface on the side where the cage fixing groove 7 is provided is It is arranged toward the step surface 20a. Operation member 1
6 is interposed between the inner ring 1 and the step surface 20a.

The operating member 16 has a collar-shaped ring portion 16b located on the outer peripheral side of the retainer 4, and this ring portion 16b.
A plurality of operating cam surfaces 17 are provided at a plurality of positions in the circumferential direction (four positions in the figure) on the inner peripheral surface of the retainer 4 so as to apply a radial force acting as an external force F to the cage 4 as the operating member 16 rotates. . The operation cam surface 17 is formed as a straight line that is a chord of a part of a circle that is the inner peripheral surface of the ring portion 16b. In addition, a plurality of operation cam surfaces 18 contacting these operation cam surfaces 17 respectively.
Is formed on the outer peripheral surface of the cage 4 by a protrusion having an arc-shaped cross section.

From the constant mode (both forward and reverse lock) shown in FIG. 10, the operating member 16 is moved to a predetermined angle (45 in the illustrated example).
When rotated, the operation cam surfaces 17 and 18 are engaged with each other, and a radial external force F that elastically deforms the retainer 4 toward the inner diameter side is applied from the operation member 16 to the retainer 4. As a result, the engaging protrusion 9 of the cage 4 meshes closely with the cage fixing groove 7 of the inner ring 1, the cage 4 is held in the neutral position, and the operation mode shown in FIG. )become. When the operating member 16 is returned to the state shown in FIG. 10, the external force F disappears, whereby the retainer 4 elastically restores to its original shape, and the engaging projection 9 of the retainer 4 and the retainer fixing groove 7 of the inner ring 1 are retained. And become the original loose meshing state, and the normal mode (forward / reverse bidirectional lock) shown in FIG. 9 is set.

The rotating operation of the operation member 16 as described above is performed in conjunction with the operation of the door handle 40, and when the door handle 40 is operated, the operation member 16 rotates by a predetermined angle and the operation shown in FIG.
The operation mode shown in (B) (both normal and reverse directions free) is entered,
When not operated, the operating member 16 is returned to the position shown in FIG. 10, and the normal mode (forward / reverse bidirectional lock) shown in FIG. 9 is set. Therefore, when the door handle 40 is operated, the rolling wheels 2
Since the rotation in both the forward and reverse directions is free, the slide door 34 can be freely slid and opened, and when the door handle 40 is released, the rotation of the rolling wheels 2 in the forward and reverse directions is locked. Even if the sliding door 34 is in the half-opened state, it is fixed at that position and cannot move.

In the above-mentioned embodiment, the switching from the constant mode (forward / reverse bidirectional lock) to the operation mode (forward / reverse bidirectional free) is performed by applying the external force F in the radial direction to the cage 4. Alternatively, the engaging protrusion of the cage and the cage fixing groove of the inner ring may be axially engaged with each other, and an external force F in the axial direction may be applied to the cage. Also in this configuration, when the axial external force F is not applied to the retainer, the engaging convex portion of the retainer and the retainer fixing groove of the inner ring are loosely meshed with each other so that the retainer has a predetermined range relative to the rotating direction of the retainer. When the cage is allowed to move and an external force F is applied to the cage,
The engaging convex portion of the cage and the cage fixing groove of the inner ring are closely meshed with each other to hold the cage at the neutral position. However, in this configuration, the cage can be relatively moved in the axial direction with respect to the inner ring by ON / OFF of the external force F in the axial direction to switch the mode, so that the elastic deformation of the retainer by the external force F is not always required. It is not necessary, and therefore, in this configuration, it is not essential that the cage be made of an elastically deformable material. Also, in order to improve the switching response from the operation mode (both forward / reverse direction free) to the constant mode (forward / reverse direction locked), the axial position of the cage is restored to the original position when the external force F in the axial direction is removed. Means may be provided. The returning means may be any means that applies an external force in the direction opposite to the axial external force F to the retainer, and can be formed of an elastic body such as a spring. Furthermore, according to the configuration shown in FIGS. 10 and 11, an operating member for ON / OFF operation of the axial external force F may be provided. In this case, the operation cam surface is provided on the end surfaces of the retainer and the operation member that face each other in the axial direction.

In the above-described embodiment, the roller is used as the engaging element, but a ball may be used. Further, the cam surface may be provided on the rolling wheel and the circumferential surface may be provided on the inner ring. Further, the inner ring may be eliminated, and the cam surface or the circumferential surface as the clutch element and the ball raceway surface as the rolling bearing element may be formed directly on the outer peripheral surface of the support shaft. A non-circular engagement element such as a sprag may be used as the engagement element. In this case, the engaging element is formed with a cam surface in both the forward and reverse directions, and the rolling surface, the inner wheel or the support shaft is provided with a circumferential surface.

[0036]

According to the present invention, the operation of the door handle
By releasing it, it becomes possible to freely open and close the slide door and fix it at an arbitrary position, so, for example, when the vehicle is stopped on a slope and the slide door is opened and closed,
When the hand is released from the door handle, the slide door can be held in a half-opened state, and the convenience of this type of slide door mechanism can be enhanced.

Further, by providing the rolling bearing means with the two-way clutch mechanism between the rolling wheel and the support shaft, the rolling wheel further includes a clutch outer ring of the two-way clutch mechanism and a bearing outer ring of the rolling bearing means. By combining
It is possible to achieve simplification, downsizing, weight reduction, and cost reduction of the supporting structure of this type of slide door.

Further, by providing the door handle with the forward / reverse bidirectional free holding mode, it is possible to perform the fully open / closed operation similarly to a normal slide door.

[Brief description of drawings]

FIG. 1 (A) is a side view of a cab-over type automobile, and FIG. 1 (B) is a sectional view of a slide door attached thereto.

FIG. 2 is a cross-sectional view of a rolling wheel unit with a two-way clutch.

FIG. 3 is a vertical sectional view taken along the line I-I in FIG.

FIG. 4 is a perspective view of an inner ring.

FIG. 5 is an enlarged sectional view showing various examples of a cam surface of an inner ring.

FIG. 6 is a perspective view of a cage.

FIG. 7 is a perspective view when an elastic body is attached to the cage.

FIG. 8 is an operation explanatory view.

FIG. 9 is an operation explanatory view.

FIG. 10 is a broken sectional view showing another embodiment of a rolling wheel unit with a two-way clutch.

11 is a vertical cross-sectional view of FIG.

[Explanation of symbols]

1 inner ring 2 rolling wheels 2a Circumferential surface 3 roller 4 cage 5 elastic body 6 Cam surface 7 Cage fixing groove 9 Engagement protrusion 12 Locking means 13 Lock release means 14 Positioning means 30 car body 31 Guide rail 32 Guide rail 33 Guide rail 34 sliding door 40 door handle 41 cable wire

Claims (9)

[Claims] 1. A slide door support structure for slidably supporting a slide door along a guide rail of a main body by a guide rail provided on the main body and a rolling wheel rotatably supported by the slide door, at least: Between the rolling wheel to which the load of the sliding door is applied and the supporting shaft provided on the sliding door, a locking means for always locking the rotation of the rolling wheel in both the forward and reverse directions with respect to the supporting shaft, and a door handle of the sliding door. Of a sliding door provided with a two-way clutch mechanism having a lock releasing means for releasing the locked state by the locking means in conjunction with the operation of the above and freeing the rotation of the rolling wheel with respect to the support shaft in both the forward and reverse directions. Construction. 2. A lock means of the two-way clutch mechanism is formed by the rolling wheel, the support shaft or an inner ring fixed to the support shaft, and an engaging element interposed therebetween, in both the forward and reverse directions. The lock releasing means is a wedge for controlling the position or posture of the engagement element in the rotational direction and the rotational position of the retainer in association with the operation of the door handle. 2. The support structure for a slide door according to claim 1, wherein the joint element comprises a positioning means for holding the joint element in a neutral position where it is separated from the wedges in both the forward and reverse directions. 3. The circumferential surface provided with one of the rolling wheel and the support shaft or the inner ring, the cam surface provided with the other of the wedges in both the forward and reverse directions, and the circumferential surface. And an engaging member having a circular cross section interposed between the cam surface and the cam surface,
The support structure for a slide door according to claim 2, wherein the engagement element is disengaged from the wedges in both the forward and reverse directions when the engagement element is located at the disengagement position of the cam surface. 4. The cam surface has a deep central portion in the rotational direction,
4. A shape having a gradually shallower shape toward both sides, and at a central portion thereof at the disengagement position, a distance between the circumferential surface and the circumferential surface causes a slight clearance with respect to a diameter of the engaging element. Supporting structure for the sliding door described. 5. The positioning means is a concave-convex engaging portion provided between the cage and either one of the rolling wheel, the support shaft or the inner ring, and the concave-convex engaging portion. When the door handle is not operated, the cage is loosely meshed with each other to allow relative movement of the cage in a predetermined range in the rotation direction, and the cage is neutrally meshed with each other in close meshing with the operation of the door handle. The support structure for a slide door according to claim 2, which is held in a position. 6. The slide door according to claim 2, wherein an elastic body for generating a predetermined frictional force is interposed between the cage and the rolling wheel, one of the support shaft or the inner ring, and the retainer. Support structure. 7. The body is an automobile body.
Supporting structure for the sliding door described. 8. A support structure for a slide door according to claim 1, wherein rolling bearing means is provided along with said two-way clutch mechanism between said rolling wheel and said support shaft. 9. The support structure for a slide door according to claim 8, wherein the rolling wheels serve also as a clutch outer ring of the two-way clutch mechanism and a bearing outer ring of the rolling bearing means.