Vehicle slide door opening and closing device

Abstract

To provide a slide door opening and closing device capable of reducing the operating resistance of a drive belt and preventing the generation of abnormal noise even when the belt moves up and down without increasing the number of components.SOLUTION: Provided is a vehicle slide door opening and closing device that opens and closes a slide door using a belt that operates along a belt sliding surface of a belt guide. At least one or more recesses or holes are formed on the belt sliding surface.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a vehicle sliding door opening and closing device for automatically opening and closing a vehicle sliding door, and more particularly to a vehicle sliding door opening and closing device that can reduce the operating resistance of a belt for opening and closing a vehicle sliding door and prevent the generation of abnormal noise even when the belt moves up and down. [Background technology]

[0002] In a vehicle sliding door opening and closing device, a structure is known in which a sliding door is opened and closed by a cable or a drive belt that operates along a guide member, as in Patent Documents 1 and 2. The guide member is shaped to conform to the vehicle body panel, and the vicinity of the opening of the sliding door is curved. When the sliding door is operated, the cable or the drive belt may come into contact with this curved portion due to bending. When the cable or the drive belt comes into contact, the operating resistance of the belt increases due to sliding contact, and there is a risk of abnormal noise being generated. In Patent Document 1, a countermeasure is taken by providing a separate sliding member at the curved portion, but this leads to an increase in the number of parts and an increase in the number of assembly steps to the guide member, leading to an increase in costs. In Patent Document 2, a countermeasure is taken by providing a plurality of recesses extending in the sliding contact direction at the curved portion, but the recesses are grooves parallel to the belt operating direction, and when the belt moves up and down at the curved portion during operation, or when the belt is bent up and down at the curved portion, the edge of the belt gets caught in the recesses, increasing the operating resistance, and there is a risk of abnormal noise being generated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-317324 [Patent Document 2] JP 2023-53640 A Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the above problems, the present invention aims to provide a sliding door opening and closing device that can reduce the operating resistance of the belt and prevent the generation of abnormal noise even when the cable or drive belt moves up and down, without increasing the number of parts. [Means for solving the problem]

[0005] According to the present invention, the above problems are solved as follows. (1) A first invention is a vehicle sliding door opening and closing device that opens and closes a sliding door using a belt that operates along a belt contact surface of a belt guide, characterized in that at least one recess or hole is formed on the belt contact surface.

[0006] By forming a recess or hole in the belt guide, the contact area between the belt and the belt sliding surface can be reduced, the operating resistance of the belt can be reduced, and the generation of abnormal noise can be prevented. By forming a recess or hole directly in the belt guide, the operating resistance of the belt can be reduced without increasing the number of parts.

[0007] (2) The second invention is the vehicle sliding door opening and closing device described in (1), characterized in that the belt guide has a curved corner portion, and at least one of the recesses or holes is formed on the belt sliding surface formed by the corner portion.

[0008] Since the side wall of the corner portion of the belt guide on the vehicle exterior is likely to become the belt sliding contact surface, the operating resistance of the belt can be effectively reduced by forming a recess or hole in the belt sliding contact surface formed by this corner portion.

[0009] (3) A third invention is the vehicle sliding door opening and closing device described in (1), characterized in that the recess or the hole is a round hole or a square hole, and the diameter of the round hole or the height of the square hole or the square hole is smaller than the belt width.

[0010] By making the diameter or height of the recesses or holes smaller than the belt width, the belt teeth will not fall into the recesses or holes, reducing the possibility of the belt teeth getting caught in the recesses or holes.

[0011] (4) The fourth invention is the vehicle sliding door opening and closing device described in (3) above, characterized in that the recess or hole is a linear recess or hole extending in the opening and closing operation direction of the belt.

[0012] The contact area between the belt and the belt guide can be further reduced, and the operating resistance of the belt can be reduced. Here, the term "linear" refers to an elongated shape having a major axis and a minor axis.

[0013] (5) The fifth invention is a vehicle sliding door opening and closing device as described in (3), characterized in that the recess or the hole is a linear recess or hole extending in a direction different from the opening and closing operation direction of the belt.

[0014] The contact area between the belt and the belt guide can be further reduced, and the operating resistance of the belt can be reduced.

[0015] (6) The sixth invention is the vehicle sliding door opening and closing device described in (1) above, characterized in that a honeycomb structure hole or a honeycomb structure aperture is formed on the belt sliding contact surface by a plurality of the recesses or the holes.

[0016] By employing a honeycomb structure for the recesses or holes, it is possible to reduce the contact area between the belt and the belt guide while maintaining the strength of the belt sliding surface.

[0017] (7) The seventh invention is a vehicle sliding door opening and closing device as described in (2) above, characterized in that the recess or hole of the corner portion of the belt guide is one large recess or hole spanning the entire corner portion.

[0018] Since the belt does not come into contact with the belt guide at corners where the belt is likely to slide, the generation of abnormal noise can be reliably prevented.

[0019] (8) The eighth invention is a vehicle sliding door opening and closing device as described in (7), characterized in that when the one large recess or hole is the one large hole, at least the one large hole is provided with a crosspiece portion connecting the top and bottom of the one large hole.

[0020] The crosspiece improves the strength of the corners of the belt guide and prevents the belt from bending toward the inside of the vehicle and coming into contact with the belt on the opposite side.

[0021] (9) The ninth invention is a vehicle sliding door opening and closing device that opens and closes a sliding door with a belt that operates along a belt guide, characterized in that a embossed layer is formed on the belt sliding contact surface of the belt guide.

[0022] By forming a textured layer directly on the belt sliding surface, the contact area between the belt and the belt guide can be reduced without increasing the number of parts, reducing the belt operating resistance and preventing the generation of abnormal noise. The textured shape formed on the textured layer is minute compared to the belt teeth, so the belt teeth do not get caught when the belt is opened or closed, and the belt teeth do not get caught even when the belt moves up and down, reducing the belt operating resistance.

[0023] (10) The tenth invention is the vehicle sliding door opening and closing device described in (9), characterized in that the belt guide has a curved corner portion, and the embossed layer is formed on the belt sliding contact surface formed by the corner portion.

[0024] The side wall of the corner portion of the belt guide facing the vehicle exterior is likely to be the surface that the belt slides against, so by forming a textured layer on this surface of the corner portion that the belt slides against, the operating resistance of the belt can be effectively reduced.

[0025] (11) The eleventh invention is a vehicle sliding door opening and closing device as described in (9) above, characterized in that the direction of the embossed unevenness or pattern formed on the embossed layer is different from the belt opening and closing operation direction.

[0026] By forming the embossed unevenness or pattern in a direction different from the belt opening / closing direction, the possibility of the belt teeth getting caught in the embossed layer can be further reduced.

[0027] (12) The twelfth invention is the vehicle sliding door opening and closing device described in (9), characterized in that the embossing shape formed in the embossed layer of the belt sliding contact surface of the belt guide is a matte texture.

[0028] The textured surface has an irregular shape with no directional effect, which reduces the possibility of the belt teeth getting caught in the textured layer and suppresses uneven wear of the belt.

[0029] (13) A thirteenth aspect of the present invention is the vehicle slide door opening and closing device according to (12), characterized in that the depth of the matte grain is 100 μm or less.

[0030] When forming a textured layer on the belt sliding surface using a die, making the texture shallower makes it harder for the belt sliding surface to stick to the die during molding, improving productivity. Furthermore, making the texture shallower makes the texture finer, which reduces the operating resistance of the belt when in contact.

[0031] (14) A fourteenth aspect of the present invention is the vehicle slide door opening and closing device described in (9) above, characterized in that grease is applied to the belt sliding contact surface on which the textured layer is formed.

[0032] Since the textured layer has many grooves, when grease is applied, the grease is retained in the grooves and is less likely to fall off, so the effect of the grease in reducing the operating resistance of the belt lasts longer. Effect of the Invention

[0033] In the vehicle sliding door opening and closing device of the present invention, by forming recesses, holes, or textured layers on the belt sliding surface of the belt guide, the contact area between the belt and the belt sliding surface can be reduced, the operating resistance of the belt can be reduced, and the generation of abnormal noise can be prevented. By directly forming recesses, holes, or textured layers on the belt guide, the operating resistance of the belt can be reduced without increasing the number of parts. [Brief description of the drawings]

[0034] [Figure 1] 1 is a side view of a vehicle equipped with a vehicle slide door opening and closing device according to an embodiment of the present invention; [Diagram 2] 1 is a perspective view of a vehicle slide door opening and closing device according to an embodiment of the present invention, as viewed obliquely from the front. [Diagram 3] 3 is a perspective view of the vehicle sliding door opening and closing device from which a motor module and a center rail are removed in FIG. 2, as viewed obliquely from the front. [Figure 4] 4 is a perspective view of the vehicle slide door opening and closing device from which the belt and belt-related parts are removed in FIG. 3, as viewed obliquely from the front. [Diagram 5] FIG. 4 is a vertical cross-sectional view taken along the line AA in FIG. [Figure 6] FIG. 6 is a schematic diagram of a belt having belt teeth and a belt sliding contact surface having recesses or holes according to the first embodiment of the present invention, as viewed from above. [Figure 7] FIG. 7a is a schematic diagram of a belt having belt teeth and a belt sliding surface having a circular recess or hole, as viewed from the outside of the vehicle, and FIG. 7b is an image diagram thereof. [Figure 8] FIG. 7b is an image diagram showing a case where the belt sliding contact surface has linear recesses or holes in the opening / closing operation direction of the belt. [Figure 9] FIG. 7B is an image diagram showing a case where the belt sliding contact surface in FIG. 7B has linear recesses or holes in a direction different from the opening and closing operation direction of the belt. [Figure 10] FIG. 7b is an image diagram showing a case where the belt sliding surface has recesses or holes of a honeycomb structure. [Figure 11] 1 is a schematic diagram showing a belt having belt teeth and a belt sliding surface having one large recess or hole spanning the entire belt sliding surface of a corner portion, as viewed from the vehicle exterior. [Figure 12] 12 is a schematic diagram showing a belt sliding contact surface in which a crosspiece is provided in one large hole in FIG. 11. FIG. [Figure 13] FIG. 13 is a diagram showing the positional relationship between the belt on the outer side of the vehicle and the belt on the inner side of the vehicle when viewed from above in FIG. [Figure 14] 5 is a schematic diagram showing a belt having belt teeth and a belt sliding contact surface having a textured layer on its surface according to a second embodiment of the present invention, as viewed from above. FIG. [Figure 15] 3A to 3C are diagrams showing various texture shapes formed on the texture layer on the belt sliding contact surface. [Figure 16] 1 is a diagram showing a texture formed on the texture layer on the belt sliding contact surface in a direction different from the opening and closing operation direction of the belt; FIG. [Figure 17] FIG. 17a is a diagram showing a matte (fine) grain and a partially enlarged view thereof, and FIG. 17b is a diagram showing a matte (standard) grain and a partially enlarged view thereof. [Figure 18] FIG. 18a shows the relationship between the belt sliding surface and the die when the texture depth is small, and FIG. 18b shows the relationship between the belt sliding surface and the die when the texture depth is large. [Figure 19] FIG. 15 is a schematic diagram showing a grease layer applied to the surface of the textured layer in FIG. 14. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiment described below, and includes appropriate modifications of the embodiment described below within the scope obvious to those skilled in the art.

[0036] As shown in Fig. 1, a vehicle sliding door opening and closing device 1 according to this embodiment is mounted on a small wagon-type vehicle 2 and automatically opens and closes a rear door, a sliding door 3. In the following description of the vehicle sliding door opening and closing device 1, unless otherwise specified, directions refer to the front, rear, up, down, outside, and inside of the vehicle relative to the vehicle 2.

[0037] The sliding door 3 is supported so as to be able to be opened and closed in the fore-and-aft direction by upper rails 4A, center rails 4B and lower rails 4C fixed to the vehicle body and facing in the fore-and-aft direction, and is automatically opened and closed by a vehicle sliding door opening and closing device 1 attached to a vehicle body panel 4, which is a part of the vehicle body. The upper roller 6 is a guide roller (not shown) attached to the upper front part of the sliding door 3, the center roller 5 is a guide roller (described below) attached to the central rear part of the sliding door 3, and the lower roller 7 is a guide roller (not shown) attached to the lower front part of the sliding door 3.

[0038] When mounted on the vehicle 2, the vehicle sliding door opening and closing device 1 is covered from the outside by a finisher 4D that has the same color as the vehicle body panel 4, so that it is substantially invisible from the outside. The center rail 4B is generally provided at a height between the fuel filler opening 4E and the tire housing 4F.

[0039] The vehicle sliding door opening and closing device 1 will be described with reference to Fig. 2. The center rail 4B is made of steel, has a generally C-shaped vertical cross section that opens toward the vehicle exterior, is fixed to the outer surface of the vehicle body panel 4, and has a straight section 4Ba that is straight in the front-rear direction and a corner section 4Bb that curves continuously from the front of the straight section 4Ba toward the vehicle interior. The upper rail 4A and the lower rail 4C are not described here because they are not directly related to the present invention.

[0040] The center roller 5, which is attached to the rear center of the top and bottom of the sliding door 3, has a base portion 51 fixed to the sliding door 3 with fastening members such as bolts, and two front and rear guide rollers 5a pivoted to the base portion 51 so as to be freely rotatable about an axis in the vertical direction, and a guide roller (not shown) pivoted to the base portion 51 so as to be freely rotatable about an axis in the left and right direction. These guide rollers are mounted within the center rail 4B so as to be freely rollable in the longitudinal direction (front-to-back direction), thereby supporting the top and bottom center of the sliding door 3 so as to be freely slidable in the front-to-back direction.

[0041] 3 mainly shows the belt guide 11 and the belt 12 related to the present invention. The vehicle slide door opening and closing device 1 includes the belt guide 11 made of synthetic resin, the flat rubber belt 12 that moves in a circular motion while being guided by the belt guide 11 in its longitudinal direction (front-rear direction), a motor module 30 (see FIG. 2) including a motor 31 that outputs power for automatically opening and closing the slide door 3 via the belt 12, and the like, and a belt bracket 13 that connects the belt 12 to the center roller 5.

[0042] The belt guide 11 is pivotally supported at its front end 11c by a pivot 141 facing in the vertical direction, and similarly at its rear end 11d, which is provided at the rearmost part of the belt guide 11, by a pivot (not shown) facing in the vertical direction. The belt guide 11 is fixed to the vehicle body panel 4 by a front bracket 16 provided at the front end 11c and a rear bracket (not shown) provided at the rear end 11d (see Figure 2).

[0043] The front bracket 16 is made of metal, and is fastened to the vehicle body panel 4 with bolts 161 to fix the front end 11c of the belt guide 11 to the vehicle body panel 4. Similarly, a rear bracket (not shown) provided at the rearmost part of the belt guide 11 is made of metal, and is fastened to the vehicle body panel 4 with bolts (not shown) to fix the rear end 11d of the belt guide 11 to the vehicle body panel 4.

[0044] As shown in FIG. 3, the belt 12 has a front end that is passed around a front reversing pulley 145 pivoted to the front part of the belt guide 11 and a rear end that is passed around a rear reversing pulley 146 pivoted to the rear part of the belt guide 11. The belt 12 is reversed toward the inside of the vehicle by the front reversing pulley 145 (see FIG. 13), and is passed around a drive pulley (not shown) that is driven by the motor 31 of the motor module 30. As the drive pulley rotates, the belt 12 circulates in the front-to-rear direction along the belt guide 11.

[0045] The belt 12 is connected to the sliding door 3 via the belt bracket 13 and the center roller 5. As a result, the sliding door 3 automatically opens and closes as the belt 12 moves cyclically by the power of the motor 31. The belt bracket 13 is connected to the portion of the belt 12 that moves on the outside of the vehicle via a first belt bracket 13A and a second belt bracket 13B at its upper part, and is connected at its lower part to a base part 51 of the center roller 5, thereby connecting the belt 12 and the center roller 5 to each other.

[0046] Fig. 4 shows the belt guide 11 with the belt 12 and its related parts removed from Fig. 3. The belt guide 11 has a shape that follows the longitudinal direction (front-rear direction) of the center rail 4B (see Fig. 2), and includes a straight portion 11a shaped along the straight portion 4Ba of the center rail 4B, and corner portions 11b shaped along the corner portions 4Bb of the center rail 4B.

[0047] The belt sliding surface 22 is formed on the side wall of the belt guide 11 on the vehicle exterior side. Structurally, the belt sliding surface 22 refers to the side wall of the belt guide 11 on the vehicle exterior side. When the belt 12 circulates in the front-rear direction on the side wall of the belt guide 11 on the vehicle exterior side, the range in which the belt 12 may come into sliding contact with the side wall of the belt guide 11 on the vehicle exterior side is defined as the belt sliding surface 22.

[0048] Fig. 5 is a vertical cross-sectional view taken along line AA in Fig. 3, showing a vertical cross-section facing the corner portion 11b of the belt guide 11. The belt 12 on the vehicle exterior side is looped around the front reversing pulley 145 at the tip of the corner portion 11b of the belt guide 11 and changes direction (see Fig. 3), so that the belt 12 on the vehicle exterior side is in sliding contact with the side wall of the corner portion 11b on the vehicle exterior over the entire area. In Fig. 5, the belt 12 on the vehicle exterior side is in sliding contact with the side wall of the corner portion 11b on the vehicle exterior, forming a belt sliding contact surface 22.

[0049] [Embodiment 1] 6a shows the belt 12 and the belt sliding surface 22 of the belt guide 11 as the first embodiment of the vehicle sliding door opening and closing device 1 of the present invention, and the belt 12 moves cyclically in the front-rear direction along the belt sliding surface 22 to open and close the sliding door 3. At least one recess 23 or hole 24 is formed in the belt sliding surface 22, and the belt 12 is provided with belt teeth 12a along its entire inner circumference. Here, the "recess" refers to a configuration in which a target portion is recessed from the surroundings, and the "hole" refers to a configuration in which a target portion penetrates to the opposite side.

[0050] The belt teeth 12a of the belt 12 are formed around the entire inner circumference of the belt 12 in FIG. 3 in order to ensure that the belt bracket 13 (see FIG. 3) is connected to the belt 12. The width W2 of the bottom of the belt teeth 12a is, for example, 3 mm. Teeth of a similar shape are also formed on the second belt bracket 13B of the belt bracket 13 that meshes with the belt teeth 12a, and the belt teeth 12a of the belt 12 mesh with the teeth of the second belt bracket 13B to ensure the connection between the belt bracket 13 and the belt 12. The width W1 in the vertical direction of the belt 12 shown in FIG. 7a is, for example, 6 mm.

[0051] The outer periphery of the drive pulley that circulates the belt 12 in the forward and backward directions to open and close the sliding door 3 also has teeth similar to the belt teeth 12a of the belt 12. When the drive pulley driven by the motor 31 of the motor module 30 drives the belt 12, it meshes with the belt teeth 12a of the belt 12, thereby ensuring the connection between the drive pulley and the belt 12.

[0052] As shown in FIG. 6, by forming the recesses 23 or holes 24 on the belt sliding surface 22, the area of ​​contact between the belt teeth 12a and the belt sliding surface 22 is reduced, so that the operating resistance of the belt 12 is reduced and the generation of abnormal noise can be prevented. Note that only the recesses 23 or only the holes 24 may be provided on the belt sliding surface 22. Also, the recesses 23 and the holes 24 may be mixed. For example, in FIG. 7a, three rows of recesses 23a or holes 24a are formed in the vertical direction of the belt sliding surface 22, but among them, the bottom row may be the holes 24a and the top row and the middle row may be the recesses 23a. Note that by making the bottom row the holes 24a, it is possible to double as a function of a water drain hole for draining infiltrated rainwater.

[0053] One or more recesses 23 or holes 24 may be formed on the belt sliding surface 22 of the corner portion 11b of the belt guide 11. The belt 12 that moves along the side wall of the corner portion 11b on the vehicle exterior side is looped around the front reversing pulley 145 at the tip of the corner portion 11b and changes direction (see FIG. 3), so that the belt 12 is in sliding contact with the side wall of the corner portion 11b on the vehicle exterior side over the entire area. Therefore, by forming recesses or holes on the belt sliding surface 22 formed on the corner portion 11b, the operating resistance of the belt 12 can be effectively reduced.

[0054] 7a shows a configuration in which the recess 23 or hole 24 is a round hole 23a or a round hole 24a, and the diameter of the round hole 23a or the round hole 24a is smaller than the width W1 of the belt 12. Since the diameter of the round hole 23a or the round hole 24a is smaller than the width W1 of the belt 12, the belt tooth 12a does not fall into the recess 23 or the hole 24, and the possibility of the belt tooth 12a getting caught in the recess 23 or the hole 24 can be reduced. Here, the round hole refers to a circular recess, and the round hole refers to a circular hole.

[0055] The recess 23 or hole 24 may be a rectangular hole or rectangular hole (not shown), and the height of the rectangular hole or rectangular hole may be smaller than the width W1 of the belt 12. By making the height of the rectangular hole or rectangular hole smaller than the width W1 of the belt 12, the belt tooth 12a does not fall into the rectangular hole or rectangular hole, and the possibility of the belt tooth 12a getting caught in the rectangular hole or rectangular hole can be reduced. Here, the rectangular hole refers to a polygonal recess, and the rectangular hole refers to a polygonal hole. The polygon may be a regular polygon or a scalene polygon.

[0056] FIG. 7b is an image representation of FIG. 7a, and gives the same overall impression of the configuration of the invention as FIG. 7a.

[0057] 8 shows a configuration in which the recess 23 or hole 24 is a linear hole 23c or a linear hole 24c extending in the opening / closing direction of the belt 12, and the minor axis of the linear hole 23c or the linear hole 24c is smaller than the width W1 of the belt 12. Here, "linear" means an elongated shape having a major axis and a minor axis, a linear hole means an elongated recess, and a linear hole means an elongated hole. In FIG. 8, the major axis of the line extends in the opening / closing direction of the belt 12. The linear hole 23c or the linear hole 24c can further reduce the contact area between the belt and the belt guide, and the operating resistance of the belt 12 can be reduced.

[0058] 9 shows a configuration in which the recess 23 or hole 24 is an inclined linear hole 23d or an inclined linear hole 24d whose major axis extends in a direction different from the opening / closing operation direction of the belt 12. With such a configuration, the contact area between the belt and the belt guide can be further reduced, and the operating resistance of the belt 12 can be reduced.

[0059] 10 shows a configuration in which a plurality of recesses 23 or holes 24 form honeycomb structure holes 23e or honeycomb structure holes 24e on the belt sliding contact surface, and the height of the honeycomb structure holes 23e or honeycomb structure holes 24e is smaller than the width W1 of the belt 12. A honeycomb structure refers to a structure in which regular hexagons are arranged without gaps, or a structure in which three-dimensional figures such as triangles and rectangles are arranged without gaps. By employing a honeycomb structure as the recesses or holes, it is possible to reduce the contact area while maintaining the strength of the belt sliding contact surface.

[0060] FIG. 11 shows a structure in which a recess or hole is formed in the belt sliding surface 22 of the corner portion 11b of the belt guide 11, and this recess or hole is one large recess 23f or one large hole 24f that spans the entire belt sliding surface 22 of the corner portion 11b.

[0061] The belt 12 that operates on the side wall of the corner portion 11b on the vehicle exterior side is looped around the front reversing pulley 145 at the tip of the corner portion 11b and changes direction, so that the belt 12 is in sliding contact with the side wall of the corner portion 11b on the vehicle exterior side over the entire area. Therefore, by forming one large recess 23f or one large hole 24f on the belt sliding contact surface 22 of the corner portion 11b, the belt 12 does not come into contact with the belt sliding contact surface 22 of the corner portion 11b, and therefore, the generation of abnormal noise can be reliably prevented.

[0062] 12 shows a structure in which, when the recess 23 or hole 24 in FIG. 11 is one large hole 24f, at least one crosspiece 25 is provided to connect the top and bottom of the large hole 24f. The crosspiece 25 improves the strength of the belt sliding surface 22 of the corner portion 11b and prevents the belt 12 from bending toward the inside of the vehicle and coming into contact with the belt 12 on the opposite side.

[0063] Fig. 13 shows the positional relationship between the belt 12 on the outside side of the vehicle and the belt 12 on the inside side of the vehicle when viewed from above in Fig. 12. If the crosspiece 25 is not provided, the belt sliding surface 22 of the corner portion 11b only has one large hole 24f, so there is nothing to separate the belt 12 on the outside side of the vehicle and the belt 12 on the inside side of the vehicle, and if the belt bends, there is a risk that the belt 12 on the outside side of the vehicle and the belt 12 on the inside side of the vehicle will easily come into contact with each other. By providing the crosspiece 25, even if the belt 12 on the outside side of the vehicle bends, the belt 12 comes into contact with the crosspiece 25 and will not bend further toward the inside side of the vehicle.

[0064] [Embodiment 2] 14 shows the belt 12 and the belt sliding surface 22 of the belt guide 11 as the second embodiment of the vehicle slide door opening and closing device 1 of the present invention, and the belt 12 opens and closes the slide door 3 by circularly moving in the longitudinal direction (front-rear direction) along the belt sliding surface 22. A textured layer 26 is formed on the belt sliding surface 22, and the belt 12 has belt teeth 12a formed along the entire inner circumference thereof.

[0065] The belt guide 11 is made of synthetic resin, and the belt 12 is made of rubber. The embossed shape formed in the embossed layer is an unevenness or pattern formed on the surface of the belt sliding contact surface 22 made of synthetic resin, and the embossed layer 26 is formed on the surface of the belt sliding contact surface 22 using a die engraved with the unevenness or pattern.

[0066] The embossed shape of the unevenness or pattern formed on the embossed layer 26 is not particularly limited, but in Fig. 14, for example, linear unevenness parallel to the operating direction of the belt 12 is formed. By directly forming the embossed layer 26 on the belt sliding surface 22 of the belt guide 11 in this manner, the contact area between the belt 12 and the belt sliding surface 22 can be reduced without increasing the number of parts, and the operating resistance of the belt 12 can be reduced and the generation of abnormal noise can be prevented. The embossed shape formed on the embossed layer 26 is minute with respect to the belt teeth 12a, so that the belt teeth 12a do not get caught on the embossed layer 26 when the belt is opened or closed, and the belt teeth 12a do not get caught on the embossed layer 26 even when the belt moves up and down, and therefore the operating resistance of the belt 12 can be reduced.

[0067] The textured layer 26 in Fig. 14 may be formed on the belt sliding surface 22 of the corner portion 11b of the belt guide 11. The belt 12 that moves along the side wall of the corner portion 11b on the vehicle exterior side is looped around the front reversing pulley 145 at the tip of the corner portion 11b and changes direction (see Fig. 3), so that the belt 12 is in sliding contact with the side wall of the corner portion 11b on the vehicle exterior side over the entire area. Therefore, by forming the textured layer 26 on the belt sliding surface 22 formed by the corner portion 11b, the operating resistance of the belt 12 can be effectively reduced.

[0068] FIG. 15 shows examples of the grain shapes, which are various irregularities or patterns formed on the grain layer. Reference numeral 26a denotes a matte (fine) grain, and the depth of the grain shape is 30 μm. Reference numeral 26b denotes a matte (fine) grain, and the depth of the grain shape is 70 μm. Reference numeral 26c denotes a matte (standard) grain, and the depth of the grain shape is 25 μm. Reference numeral 26d denotes a linear grain, and the depth of the grain shape is 35 μm. In addition to these, the types of grain shapes are not particularly limited, and examples thereof include leather grain like the uneven surface of leather, sand grain grain like finely rough sand sprinkled on the surface, geometric grain formed by arranging figures such as polygons and circles, and other hairline grain, wood grain grain, rock grain grain, etc.

[0069] Fig. 16 shows a textured layer 26 in which textures are formed on the belt sliding surface 22 in a direction different from the opening and closing operation direction of the belt 12. The texture shown in Fig. 16 is a linear texture 26d formed in a direction perpendicular to the opening and closing operation direction of the belt 12. Compared to the linear texture 26e formed parallel to the opening and closing operation direction of the belt 12 shown in Fig. 14, there is a risk that the belt tooth 12a may get caught in the recess of the linear texture 26e, but the linear texture 26d shown in Fig. 16 can reduce this risk.

[0070] It is also effective to form a textured texture on the textured layer 26 of the belt sliding surface 22. The textured texture has an irregular shape with no directional property, so that the possibility of the belt tooth 12a getting caught in the textured layer can be reduced, and uneven wear of the belt tooth 12a can be suppressed. Fig. 17a shows the textured (fine) texture 26a and a partially enlarged view thereof, and it is clear from the partially enlarged view that it is an irregular shape with no directional property. Fig. 17b shows the textured (standard) texture 26c and a partially enlarged view thereof, and it is coarser than the textured (fine) texture 26a, but it is also an irregular shape with no directional property.

[0071] The depth of the matte texture is preferably 10 μm to 100 μm. The texture is generally formed by pressing a die against the synthetic resin belt contact surface 22, but if the depth of the texture is made deeper, the synthetic resin constituting the belt contact surface 22 will be more likely to bite into the die. FIG. 18a shows the relationship between the texture layer 26 of the belt contact surface 22 and the die 27 when the draft angle of the die 27 is zero. If the depth of the texture is made deeper, the texture layer 26 made of synthetic resin will be more likely to bite into the die 27, which will reduce work efficiency. Therefore, if it is desired to make the depth of the texture deeper, it is necessary to increase the draft angle of the die 27 in advance so that the texture layer 26 is less likely to bite into the die 27, as shown in FIG. 18b.

[0072] Here, a zero draft angle refers to a case where the upper and lower bases of the trapezoidal portion of the die 27 are the same length, as shown in Fig. 18a, and a large draft angle refers to a case where the lower base is longer than the upper base, as shown in Fig. 18b. If the draft angle is large, the texture of the matte grain inevitably becomes coarse, making it difficult to reduce the operating resistance of the belt sliding surface 22 when in contact with the belt 12. Therefore, by making the depth of the matte grain shallow, from 10 μm to 100 μm, the texture of the grain becomes finer, and the operating resistance of the belt 12 when in contact can be reduced.

[0073] 19 shows a configuration in which a grease layer 28 is formed by applying grease to the belt sliding surface 22 on which the textured layer 26 is formed. The textured layer 26 has many grooves, so that the grease is held in the grooves and is less likely to fall off, and the effect of the grease in reducing the operating resistance of the belt 12 can be prolonged. [Explanation of symbols]

[0074] 1 Vehicle sliding door opening and closing device 2 Vehicles 3. Sliding Door 4 Body Panel 4A Upper Rail 4B Center Rail 4Ba Straight section 4Bb Corner 4C Lower rail 4D Finisher 4E Fuel filler port 4F Tire house 5 Center roller 5a Guide roller 6 Upper roller 7 Lower Roller 11 Belt guide 11a Straight section 11b Corner part 11c Front end 11d Rear end 12 Belt 12a belt teeth 13 Belt bracket 13A First Belt Bracket 13B Second belt bracket 141 Axis 16 Front bracket 161 Volts 22 Belt sliding surface 23 Recess 23a Round hole 23c Linear hole 23d inclined linear hole 23e Honeycomb structure hole 23f 1 large recess 24 Hole 24a round hole 24c linear hole 24d inclined linear hole 24e Honeycomb structure hole 24f 1 large hole 25 Cross section 26 Grain layer 26a, 26b, 26c Pear-textured 26d, 26e Straight grain 27 Molds 28 Grease layer 30 Motor Module 31 Motor

Claims

1. A vehicle sliding door opening and closing device that opens and closes a sliding door using a belt that operates along the belt sliding surface of a belt guide, characterized in that at least one or more recesses or holes, or at least a textured layer, are formed on the belt sliding surface.

2. 2. The vehicle sliding door opening and closing device according to claim 1, wherein the belt guide has a curved corner portion, and at least one of the recesses or holes is formed on the belt sliding surface formed by the corner portion.

3. 2. The vehicle sliding door opening and closing device according to claim 1, wherein the recess or hole is a round hole or a square hole, and the diameter of the round hole or the height of the square hole or the square hole is smaller than the belt width.

4. 4. The vehicle sliding door opening and closing device according to claim 3, wherein the recess or the hole is a linear recess or hole extending in the opening and closing direction of the belt.

5. 4. The vehicle sliding door opening and closing device according to claim 3, wherein the recess or the hole is a linear recess or hole extending in a direction different from the opening and closing direction of the belt.

6. 2. The vehicle sliding door opening and closing device according to claim 1, wherein a honeycomb structure hole or a honeycomb structure aperture is formed on the belt sliding contact surface by a plurality of the recesses or the holes.

7. 3. The vehicle sliding door opening and closing device according to claim 2, wherein the recess or the hole in the corner portion of the belt guide is one large recess or hole that spans the entire corner portion.

8. The vehicle sliding door opening and closing device according to claim 7, characterized in that when the one large recess or hole is the one large hole, at least the one large hole is provided with a rib portion connecting the top and bottom of the one large hole.

9. In the vehicle sliding door opening and closing device, which opens and closes the sliding door by the belt that operates along the belt sliding surface of the belt guide, at least the embossed layer is formed on the belt sliding surface, as described in claim 1.

10. 10. The vehicle slide door opening and closing device according to claim 9, wherein the belt guide has a curved corner portion, and at least the textured layer is formed on a belt sliding contact surface formed by the corner portion.

11. 10. The vehicle sliding door opening and closing device according to claim 9, wherein the direction of the embossed irregularities or patterns formed on the embossed layer is different from the belt opening and closing operation direction.

12. 10. The vehicle slide door opening and closing device according to claim 9, wherein the texture formed on the texture layer of the belt sliding contact surface of the belt guide is a matte texture.

13. 13. The vehicle sliding door opening and closing device according to claim 12, wherein the depth of the textured surface is 100 [mu]m or less.

14. 10. The vehicle slide door opening and closing device according to claim 9, wherein grease is applied to the belt sliding surface on which the textured layer is formed.

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