JP2009155900A - Slider unit and slider drive unit using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slider unit which is simple in structure, and positively carries out operation, and to provide a door opening/closing device using the same. <P>SOLUTION: The slider unit 1 is formed of: a slider body 2 of an almost rectangular parallelepiped which slides frontward and rearward in a guide rail; and synthetic resin sliding blocks 3a, 4a which have first sliding surfaces A arranged near the tip of the slider body for sliding on lip pieces and a bottom plate of the guide rail, and second sliding surfaces B for sliding on side plates of the guide rail. The door opening/closing device uses the slider unit 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door opening / closing device for a vehicle opening, and more particularly to a slide unit used for a back door or a trunk door (trunk lid) provided in a vehicle such as an automobile and a slider driving device using the same.

JP 2005-194793 A JP 2003-106046 A There is a device that can automatically open and close a back door or a trunk lid provided at the rear part of a vehicle. Among such devices, there is a device that slides a slider along a guide rail by a driving force of a motor and opens and closes a door via a rod that is rotatably connected to the slider. Various types of slide mechanisms have been disclosed.

  FIG. 7 shows a slider of Patent Document 1. The slider 100 urges the slider main body 101 on the upper side, the side member 102 disposed below the slider main body 101, and the slider main body 101 and the side member 102 in a direction to separate them from each other. Coil spring 103. The slider main body 101 is provided with four rotating members 101 a and rolls on the upper surface of the guide rail 104. On the other hand, the side member 102 is also provided with four rotating members 102 a and rolls on the lower surface of the guide rail 104.

  Next, FIG. 8 shows a slider of Patent Document 2. The slider 109 is a plate-like member that is thick on the left and right, and is driven back and forth by the crank arm 110. The first rotary shafts 111a and 111a are passed through and fixed in the thickness direction before and after the plate-like member. The first rotating members 111, 111, 111, 111 are pivotally supported on both sides of the sliders of the first rotating shafts 111a, 111a, respectively. The first rotating member 111 is guided by upper and lower surfaces (first guide surfaces) 113 a and 113 a of the guide rail 113. On the other hand, on the upper surface of the slider 109, two second rotating shafts 112a and 112a extend vertically upward. Second rotating members 112 and 112 are pivotally supported by the second rotating shafts 112a and 112a, respectively. The second rotating member 112 is guided by vertical walls (second guide surfaces) 113b and 113b that extend further vertically upward from the upper end of the upper and lower surfaces 113a of the guide rail 113.

  Moreover, there exists a guide piece of patent document 3 as something similar to a slider. The guide piece is a member having a U-shaped cross section sandwiching the end portion of the glass, and a material having a small frictional resistance is provided on the outer surface. And when sliding glass within a guide frame, it slides with a guide frame instead of glass.

  According to the prior art, various studies have been made on how to smoothly slide the slider in the guide rail. In other words, a load due to gravity or the like is applied to the slider when opening and closing the door, but the door cannot be opened and closed smoothly unless it is slid smoothly while supporting such a load reliably. This is because there is a possibility that the above-mentioned may occur or the durability of the apparatus may be lowered. With respect to such technical problems, in Patent Document 1, rollers are arranged above and below the slider, and the rollers are rolled while pressing the upper and lower wall surfaces of the guide rail. However, the shaft of the roller, the boss that receives the shaft, and the urging member are required, which makes the production and assembly complicated. In Patent Document 2, rollers are arranged in the vertical and horizontal directions of the guide rail so that the slider can be guided from two directions in the guide rail. However, the slider becomes large and bulky, and the number of parts is large, so that the manufacturing and assembly processes are complicated. Furthermore, Patent Document 3 discloses a method in which a window glass is slid by an elastic member. However, less consideration is given to measures for use in a portion where a load is applied, that is, measures against the strength of the elastic member against deformation during sliding or sliding stability.

  In view of the above problems, an object of the present invention is to provide a slider unit that operates reliably while having a simple structure, and a slider driving device using the same.

  A slider unit according to the present invention (Claim 1) includes a screw member that is rotated by a driving device, a guide rail that extends back and forth so as to surround the screw member, a nut member that is screwed to the screw member, and a nut member A slider unit having a rod that opens and closes a door by movement and is pivotally connected to the rod and moves along a guide rail by a nut member. A bottom plate extending in the vertical direction, both side plates extending vertically upward from both side edges of the bottom plate, and a lip piece obtained by bending the end of each side plate vertically inwardly, and sliding in the guide rail in the front-rear direction A substantially rectangular parallelepiped slider body and a first slide which is provided near the top of the slider body and slides on the lip piece or bottom plate of the guide rail. And the surface, is characterized in that the second sliding surface of the side plate and the sliding consists of eight sliding blocks made of a synthetic resin formed respectively.

  In such a slider unit, among the sliding blocks, four sliding blocks arranged on the upper surface of the slider sliding with the lip piece are integrally connected by a plate-like connecting portion, and the upper sliding body. The four sliding blocks arranged on the lower surface of the slider sliding with the bottom plate are integrally connected by a plate-like connecting portion to form a lower sliding body. It is preferable that the sliding bodies are each integrally molded with a synthetic resin.

  Further, the connecting portion of the lower sliding body is curved so as to protrude inward in the front-rear direction, and the bottom plate of the guide rail is elastically pressed by the first sliding surface of the sliding block. (Claim 3) is preferred. Further, the connecting portion of the upper sliding body is curved so as to protrude inward in the front-rear direction, and the lip piece of the guide rail is elastically pressed by the first sliding surface of the sliding block. (Claim 4) is preferable.

  The slider driving device according to the present invention (Claim 5) is screwed into the driving device, a screw member rotated by the driving device, a guide rail extending forward and backward so as to surround the screw member, and the screw member. A nut member, the slider unit described above, and a rod connected between the slider unit and the door, and the guide rail includes a bottom plate extending in the front-rear direction and both side plates extending vertically upward from both side edges of the bottom plate. And lip pieces obtained by bending the ends of both side plates vertically inward.

  In the slider unit of the present invention (Claim 1), sliding blocks are arranged near the apexes of a substantially rectangular parallelepiped slider body. The sliding block receives the force received from either the left or right side plate of the guide rail and the lip piece or the bottom plate on two surfaces of the first sliding surface and the second sliding surface, respectively. I can support it. Therefore, the force received from the two surfaces is compactly received by one sliding block. Moreover, since it is formed in a block shape, it has high durability against deformation and wear even for long-term sliding. In addition, since no roller (bearing) is used for sliding, no shaft or boss is required for this purpose. Therefore, the slider can be made thin. Further, since no rollers or bearings are used, assembly is easy. Furthermore, since the sliding block is made of synthetic resin, it is possible to reduce noise during sliding and to prevent generation of abnormal noise.

  In such a slider unit, among the sliding blocks, four sliding blocks on the upper surface side are integrally connected by a plate-like connecting portion to form an upper sliding body, and 4 on the lower surface side. When the individual sliding blocks are integrally connected by a plate-like connecting portion to form a lower sliding body, and the upper and lower sliding bodies are each integrally formed of a synthetic resin (Claim 2). Since the sliding body can be handled as one part, assembly can be facilitated. That is, a common attachment portion can be used without attaching individual slide blocks individually to the slider. If a common attachment part can be used, a slider can be made small by that much.

  Further, the connecting portion of the lower sliding body is curved so as to protrude inward in the front-rear direction, and the bottom plate of the guide rail is elastically pressed by the first sliding surface of the sliding block. In this case (Claim 3), since the connecting portion of the lower sliding body is curved, the first sliding surfaces at both ends of the sliding body can elastically contact the inner surface of the bottom plate. Therefore, it is possible to prevent the slider from rattling. Furthermore, since the slider does not rattle, it is possible to further reduce noise during sliding and to prevent the generation of abnormal noise. Further, the connecting portion of the upper sliding body is curved so as to protrude inward in the front-rear direction, and the lip piece of the guide rail is elastically pressed by the first sliding surface of the sliding block. (Claim 4), since the connecting portion is curved, the first sliding surfaces at both ends of the sliding body can elastically contact the inner surface of the lip piece. Furthermore, if the connecting parts of the upper and lower sliding bodies are inwardly projecting in the front-rear direction, the slider will not rattle further, reducing noise during sliding or preventing the generation of abnormal noise. can do.

  Since the slider drive device according to the present invention includes the slider unit described above, the slider can be thinned. For this reason, the guide for housing the slider unit can be made small, so that no space is taken in the vehicle body. Also, the weight of the entire apparatus can be reduced.

  Next, embodiments of a slider unit and a slider driving device of the present invention will be described with reference to the drawings. 1 is an exploded oblique view of the slider unit, FIG. 2 is a schematic view showing a state in which the slider drive device is used in a vehicle, FIG. 3 is a schematic oblique view showing a guide rail, and FIG. 4a is a cross-sectional view taken along a line II in FIG. 4b is a cross-sectional view taken along the line II-II of FIG. 1, FIG. 5a is a bottom view of the upper sliding body of FIG. 1, FIG. 5b is a cross-sectional view taken along the line III-III of FIG. 6b is a longitudinal sectional view of FIG. 6a.

  First, an embodiment of a slider driving device using the slider unit of the present invention will be described with reference to FIG. The slider drive device 10 in FIG. 2 is a device that opens and closes the door 11 that is pivotally connected to the upper end of the rear opening of the vehicle body S at a fulcrum 11a. The slider drive device 10 is screwed into a drive motor 12 that can rotate in the forward and reverse directions, a rotation transmission cable 13 that is rotated by the drive motor, a feed screw 14 that is rotated by the rotation transmission cable 13, and the feed screw 14. The slider unit 1 is fed up and down depending on the rotation direction, the guide rail 15 guides the slider unit 1 up and down so as not to rotate, one end of the slider unit 1 is pivotally connected, and the other end is a door. 11 and a rod 16 that is rotatably connected. The rotation transmission cable 13 is guided by a conduit (not shown). In this specification, the direction in which the bottom plate of the guide rail 15 extends is the front-rear direction, the direction connecting both edges of the bottom plate at the shortest distance is the left-right direction, and the direction perpendicular to the surface of the bottom plate is the vertical direction.

  The door 11 of the vehicle S in which such a slider unit 1 is used is provided on the back door of the vehicle body, the power lift gate, the trunk lid, the open / close sunroof that opens and closes the opening formed in the ceiling, and the side surface of the vehicle body. It opens or closes the opening of the vehicle body, such as a sliding door.

  A damper 19 is provided between the vehicle body S and the door 11 to support the weight of the door 11 and to control the opening / closing speed of the door 11. The damper 19 rotatably connects the tip 19a of the cylinder part to the door 11 and the base end 19b of the piston part to the vehicle body S so that the stroke does not get in the way when the door 11 is opened and closed. It is said. However, the damper may be omitted.

  The guide rail 15 shown in FIG. 3 is a member obtained by bending a thin metal plate into a U-shaped cross section or a channel shape with a lip. That is, the guide rail 15 includes a bottom plate 15a extending in the front-rear direction, left and right side plates 15b and 15b extending vertically upward from both side edges of the bottom plate 15a, and lip pieces 15c obtained by bending the ends of the both side plates vertically inward. 15c. Further, a bush 15d (see FIG. 6) is provided on the wall surface of the front end of the guide rail 15 so as to rotatably support the narrowed portion of the front end of the feed screw 14. The guide rail 15 is disposed in an empty space such as a gap between the inner panel and the outer panel of the vehicle body.

  The slider unit 1 shown in FIG. 1 is slidably provided in a guide rail 15 and has a slider body 2 that is a thick plate-like member and a surface that slides on the bottom plate 15a of the guide rail of the slider body 2. The lower sliding body 3 is attached to the lip piece 15c, and the upper sliding body 4 is attached to the sliding surface.

  The slider body 2 has a feed screw opening 2e for passing the feed screw 14 in the front-rear direction. A wide space 2 a (see FIG. 4 b) is formed near the middle of the opening 2 e of the feed screw, and penetrates to the lower surface side of the slider body 2. A substantially rectangular parallelepiped nut member 5 in which a female screw 5a to be screwed with the feed screw 14 is inserted is inserted into the space 2a. The void 2 a of the slider body 2 has the same external shape as the nut member 5. Therefore, when the nut member 5 is inserted into the space 2a, the nut member 5 hits the inner wall of the space 2a and cannot rotate. The slider body 2 is made of zinc alloy or aluminum alloy and is manufactured by die casting. The nut member 5 is made of a copper alloy.

  Further, a cylindrical arm stud fixing portion (hereinafter referred to as a fixing portion) 2b is provided on the upper surface of the slider body 2, and the inside thereof penetrates to the space 2a. A female thread is formed on the inner surface of the cylinder of the fixed portion 2b, and the arm stud 6 is screwed and fixed. The head of the arm stud 6 is formed in a spherical shape, and the end of the rod 16 is rotatably connected. A male screw is formed on the leg portion of the arm stud 6 and is fixed to the fixing portion 2b by screwing.

  Cutout portions 2 c are formed in four portions of the upper and lower surfaces of the slider body 2. Further, holes 2d are formed at four locations around the fixed portion 2b on the upper surface of the slider body 2. On the other hand, two holes 2d (not shown) are formed on the lower surface side at positions corresponding to the front and rear of the fixing portion 2b.

  The upper sliding body 4 includes rectangular parallelepiped sliding blocks 4a, 4a, 4a, 4a (see FIG. 5a) disposed in notches 2c, 2c, 2c, 2c formed on the upper surface of the slider body 2. These sliding blocks 4a are integrally connected by a connecting portion 4b. The connecting portion 4b is a plate-like member, and extends in the front-rear direction with the stepped portion 4e being raised in the vicinity of the center. The step 4e is guided by the tip of the lip piece 15c of the guide rail 15 coming into contact therewith. Further, the portion raised by the step portion 4e is a left and right connecting portion 4f that connects the left and right sliding blocks 4a and 4a. A front / rear connecting portion 4g for integrally connecting the front and rear sliding blocks 4a, 4a is formed on the outer side of the step portion 4e. The front and rear connecting portions 4g are formed in an L-shaped cross section, and the upper surface thereof forms a surface that is continuous with the upper surfaces of the sliding blocks 4a and 4a. On the other hand, the surface on the other side of the L-shaped cross section forms a surface continuous with the side surfaces of the sliding blocks 4a, 4a. In addition, as long as the strength of the sliding block 4a allows, a void may be formed inside the sliding block 4a to reduce the weight. In that case, it is preferable to form the recesses so as not to protrude upward from the lower side in contact with the slide body 2. An opening 4 c for allowing the fixing portion 2 b of the slider main body 2 to pass through is formed in the central portion of the upper sliding body 4.

  From the lower surface side of the connecting portion 4b, four projecting portions 4d project downward from the periphery of the opening 4c (see FIG. 5b). The protrusion 4d is formed in a bar shape (split pin shape) having a gap in the center and having an outer diameter larger than the diameter of the hole 2d of the slider body 2. Since the rod-like portion can be bent toward the gap, the upper sliding body 4 can be fixed to the upper surface of the slider body 2 by inserting and pushing the protruding portion 4d into the hole 2d of the slider body 2. The upper sliding body 4 is integrally formed of a synthetic resin such as polyacetal resin (POM). Further, even if the first sliding surface A and the second sliding surface B, which are the parts sliding with the guide rail 15, are attached or fixed with a material having low frictional resistance or high durability against sliding. Good. Moreover, when forming such a member with a synthetic resin, it can also form by insert molding.

  Returning to FIG. 1, the upper sliding block 4a has a first sliding surface A that slides with the lip piece 15c of the guide rail 15, and a second sliding surface B that slides with the side plate 15b. ing. A gap of 0.25 to 0.55 mm is formed between the second sliding surface B and the side plate 15b. Since the lower sliding body 3 is substantially the same as the upper sliding body 4 described above, description of common parts is omitted. The lower sliding body 3 includes sliding blocks 3a, 3a, 3a, 3a and a connecting portion 3b that integrally connects the sliding blocks 3a. In this sliding block 3a, the surface sliding with the bottom plate 15a of the guide rail 15 is the first sliding surface A.

  Here, the surface facing the slider main body 2 of the sliding block 4a, that is, the step facing the slider main body 2 forming the notch 2c, the surface facing the front and rear is the third surface C. To do. A surface facing in the left-right direction is defined as a fourth surface D. In addition, a surface facing the third surface C of the notch 2c is referred to as a notch front / rear surface 2f, and a surface facing the fourth surface D is referred to as a notch left / right surface 2g. The third surface C is a notch portion front / rear surface 2f that is a front-rear direction force applied to the sliding bodies 3 and 4 or a reaction force of the frictional force between the first sliding surface A and the lip piece 15c of the guide rail 15. Can be supported. On the other hand, the fourth surface D is a notched portion that is a force in the rotational direction and the lateral direction applied to the sliding bodies 3 and 4 or a reaction force of the frictional force between the second sliding surface B and the side plate 15b of the guide rail 15. It can be supported by the left and right surfaces 2g.

  The sliding block 3a of the lower sliding body 3 is formed with a protruding portion 3i protruding downward on the front and rear end sides of the sliding body 3 so that the sliding area becomes smaller with respect to the bottom plate 15a of the guide rail 15. . Therefore, a gap is formed between the vicinity of the center of the connecting portion 3 b and the bottom plate 15 a of the guide rail 15. Therefore, the lower sliding body 3 slides with the bottom plate 15a of the guide rail 15 at the convex portion 3i. Further, the lower connecting portion 3b is formed with tongue pieces 3h that can be bent up and down by forming slits in the periphery. And the protrusion part 3d protrudes upwards from these tongue pieces 3h, respectively. Further, one of the projecting portions 3d extends long in the front-rear direction. In this embodiment, the convex portion 3 i is provided on the lower sliding body 3, but may be provided on the upper sliding body 4. In addition, a gap may be formed between the sliding body 3 and the guide rail 15 by making the surface in contact with the guide rail 15 curved.

  Thus, according to the slider unit 1, the force received from the left and right side plates 15b, 15b of the guide rail 15 and the lip piece 15c or the bottom plate 15a is one sliding block 3a, 4a,. The first sliding surface A and the second sliding surface B can be supported. For this reason, the force received from the two surfaces is compactly received as one block-like sliding block 3a, 4a, so that the durability against deformation and wear is high even for long-term sliding. In addition, since no roller (bearing) is used for sliding, no shaft or boss is required for this purpose. Therefore, the slider unit 1 can be thinned. Further, since no rollers or bearings are used, assembly is easy.

  In addition, since the upper and lower sliding bodies 3 and 4 are each integrally formed of synthetic resin, the sliding bodies 3 and 4 can be handled as a single part, and assembly can be facilitated. For example, even if the individual sliding blocks 3a and 4a are not individually attached to the slider, they can be attached at a time using a common attachment portion (projecting portion 4d). Further, the first sliding surfaces A and A before and after the upper sliding body 4 and the connecting portion 4b are continuous to form one sliding surface, and the connecting portion 3b of the lower sliding body 3 is Since it curves so as to be convex inward and the bottom plate 15a of the guide rail 15 is elastically pressed by the first sliding surface A, the first sliding surfaces A at both ends of the lower sliding body 3, A can elastically contact the inner surface of the bottom plate 15a. For this reason, it is possible to prevent the slider unit 1 from rattling. Furthermore, since the sliding bodies 3 and 4 are made of synthetic resin, it is possible to reduce noise during sliding and to prevent generation of abnormal noise.

  Next, with reference to FIG. 2 and FIG. 6, the case where the slider drive apparatus 10 is used for the door opening and closing apparatus of a motor vehicle is demonstrated. The rod 16 has one end 16 a rotatably connected to the slider unit 1 side and the other end 16 b rotatably connected to the door 11. The door 11 swings around the fulcrum 11a when pushed by the other end 16b of the rod.

  As shown in FIG. 6, the drive motor 12 is disposed in an empty space of the vehicle body S (see FIG. 2), in this embodiment, in the gap between the inner panel and the outer panel near one side surface on the rear side of the vehicle body S. The And the drive motor 12 and the edge part of the rotation transmission cable 13 are connected by the connection member 12a. The end of the conduit 13 a that guides the rotation transmission cable 13 is fixed to the casing of the drive motor 12.

  As the rotation transmission cable 13, a known cable that can transmit force to the feed screw 14 is used. The rotation transmission cable 13 is guided to the feed screw 14 by the conduit 13a, and the other end is connected to the end (rear end) of the feed screw 14 by the joint cover 17 in order to rotate the feed screw 14. The end of the conduit 13 a on the feed screw 14 side is fixed to an outer joint 18 connected to a joint cover 17.

  In the slider drive device 10 configured as described above, the case where the door 11 is opened will be described. When the door 11 is closed, the slider unit 1 is located near the lower end of the feed screw 14. When the drive motor 12 rotates, the rotation transmission cable 13 rotates through the speed reducer, and the feed screw 14 rotates. When the feed screw 14 rotates, the slider unit 1 including the nut member 5 screwed with the feed screw 14 moves upward because the rotation is restricted by the guide rail 15. When the slider unit 1 moves upward, the slider unit 1 is pivotally connected thereto, and the one end 16a of the rod 16 also moves upward. The other end 16b swings upward about a fulcrum 11a provided on the vehicle body and opens.

  On the other hand, when the drive motor 12 rotates in the reverse direction, the rotation transmission cable 13 rotates in the reverse direction, and the feed screw 14 rotates in the reverse direction. When the feed screw 14 rotates in the reverse direction, the slider unit 1 screwed with the feed screw 14 moves downward. When the slider unit 1 moves downward, one end 16a of the rod 16 rotatably connected to the slider unit 1 also moves downward, and the other end 16b swings downward around a fulcrum 11a provided on the vehicle body S. Then close against the thrust of the damper 19.

FIG. 1 is an exploded perspective view of the slider unit. FIG. 2 is a schematic diagram showing a state in which the slider driving device is used in a vehicle. FIG. 3 is a schematic slope view showing the guide rail. 4a is a cross-sectional view taken along the line II of FIG. 1, and FIG. 4b is a cross-sectional view taken along the line II-II of FIG. 5a is a bottom view of the upper sliding body in FIG. 1, and FIG. 5b is a sectional view taken along line III-III in FIG. 5a. 6A is a front view of the slider driving device, and FIG. 6B is a longitudinal sectional view of FIG. 6A. It is a perspective view which shows the prior art. It is a perspective view which shows the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slider unit 2 Slider main body 2a Empty part 2b Fixed part 2c Notch part 2d Hole 2e Feed screw opening 2f Notch front-and-rear surface 2g Notch front-and-rear surface 3 Lower slide body 3a Sliding block 3b Connecting part 3d Part 3h Tongue piece 3i Protruding part 4 Upper sliding body 4a Sliding block 4b Connecting part 4c Opening 4d Protruding part 4e Step part 4f Left and right connecting part 4g Front and rear connecting part 5 Nut member 5a Female screw 6 Arm stud 10 Slider driving device 11 Door 11a Support point 12 Drive device 12a Connecting member 13 Rotation transmission cable 14 Feed screw 15 Guide rail 15a Bottom plate 15b Side plate 15c Lip piece 15d Bush 16 Rod 16a One end 16b Other end 17 Joint cover 18 Outer joint 19 Damper 19a Tip 19b Base end A First Sliding surface B Second sliding surface C Third surface D Fourth Surface

Claims (5)

A slider including a screw member that is rotated by a driving device, a guide rail that extends back and forth so as to surround the screw member, a nut member that is screwed to the screw member, and a rod that opens and closes the door by the movement of the nut member A slider unit that is used in a drive device, is rotatably connected to the rod, and moves along a guide rail by a nut member,
The guide rail includes a bottom plate extending in the front-rear direction, both side plates extending vertically upward from both side edges of the bottom plate, and lip pieces obtained by bending the ends of the both side plates vertically inwardly,
A substantially cuboid slider body that slides back and forth in the guide rail;
8 pieces made of synthetic resin provided near the top of the slider body and formed with a first sliding surface that slides with the lip piece or bottom plate of the guide rail and a second sliding surface that slides with the side plate. A slider unit consisting of a sliding block. Among the sliding blocks, four sliding blocks on the upper surface side are integrally connected by a plate-like connecting portion to form an upper sliding body,
Four sliding blocks on the lower surface side are integrally connected by a plate-like connecting portion to form a lower sliding body,
The slider unit according to claim 1, wherein the upper and lower sliding bodies are each integrally formed of synthetic resin. The connecting portion of the lower sliding body is curved so as to protrude inward in the front-rear direction,
The slider unit according to claim 2, wherein the bottom plate of the guide rail is elastically pressed by the first sliding surface of the sliding block. Additional The connecting portion of the upper sliding body is curved so as to protrude inward in the front-rear direction,
4. A slider unit according to claim 2, wherein the lip piece of the guide rail is elastically pressed by the first sliding surface of the sliding block. A slider driving device that opens and closes a door provided in an opening of a vehicle,
A driving device;
A screw member that is rotated by the drive device;
A guide rail extending back and forth so as to surround the screw member;
A nut member screwed into the screw member;
The slider unit according to claim 1, 2, 3 or 4,
It consists of a rod connected between the slider unit and the door,
A slider driving device, wherein the guide rail includes a bottom plate extending in the front-rear direction, side plates extending vertically upward from both side edges of the bottom plate, and lip pieces obtained by bending the ends of the side plates vertically inward.

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