JP4160974B2 - Sliding door braking system and rack fixing structure used therefor - Google Patents

Description

  The present invention relates to a sliding door braking system for reducing the speed of a sliding door and a rack fixing structure used therefor.

  2. Description of the Related Art Conventionally, a self-closing type sliding door that is suspended on a hanger rail, linearly opens and closes along the rail, and is automatically closed by a spring force stored by a spring spring is known. In order to reduce the closing speed before the door is fully closed, a sliding door braking system that reduces the closing speed of the sliding door is used for this type of sliding door.

  The sliding door braking system includes a rack disposed along the opening / closing direction of the sliding door, and a sliding door braking device that reduces the speed of the sliding door in cooperation with the rack. The sliding door braking device includes a pinion that can mesh with the rack, a rotation center axis of the pinion, and a braking brake unit that applies a braking force to the pinion via the rotation center axis. In general, a rack is attached to the hanger rail along its longitudinal direction, and the sliding door braking device is attached to the upper part of the sliding door directly or via another member.

  The pinion has a built-in one-way clutch. By the action of the clutch, the pinion is configured to rotate integrally with the rotation center shaft and receive a braking force from the braking brake portion only when rotating to one side. Therefore, when the pinion meshes with the rack and rotates in the closing direction, the sliding door speed is reduced by receiving the braking force from the braking brake. On the contrary, in the door opening direction, the pinion rotates idly with respect to the rotation center axis, and thus receives no braking force. Therefore, the sliding door can be opened smoothly.

  By the way, there are sliding doors that are pulled to the right when the door is opened and those that are pulled to the left. Therefore, in the sliding door braking device, in consideration of the directionality of the one-way clutch of the pinion, the pinion is mounted on the rotation center shaft so as to be adapted to the sliding direction of the sliding door, and the so-called C ring is used to remove the pinion from the rotation center shaft. Was prevented from coming off.

  As described above, the conventional sliding door brake device has poor versatility because it is a dedicated product for right and left pulling. Therefore, if the sliding direction of the sliding door cannot be determined without going to the construction site, it is necessary to prepare both a left-handed one and a right-handed one. If the sliding door brake device is to be adapted to the opposite pulling direction at the site, remove the C-ring from the center axis of rotation with a dedicated tool, reverse the direction of mounting the pinion, and then use the dedicated tool again. Needs to be fitted to the rotation center axis, and it is practically difficult to change in the field.

  In any case, the conventional sliding door braking device and the sliding door braking system are suitable for a construction method in which the sliding direction of the sliding door is confirmed in advance, and a suitable one is carried to the site and attached. However, because it is a dedicated product for right and left pulling, the operator determines whether the sliding door is for left or right pulling at the site, and the pinion of the sliding door brake device is set flexibly based on the result. It was unsuitable for the construction method of attaching to sliding doors.

  Accordingly, the present invention has been made in view of the above-described conventional problems, and provides a sliding door braking system that can be easily used for both a right-handed sliding door and a left-handed sliding door, and a rack fixing structure used therefor. Let it be an issue.

  The present invention has been made to solve the above problems, and a sliding door braking system according to the present invention includes a rack disposed along a sliding door opening / closing direction on a hanger rail that suspends and supports the sliding door, A sliding door braking device that reduces the closing speed of the sliding door, and the sliding door braking device includes a pinion that can mesh with the rack, a rotation center axis of the pinion, and a braking force applied to the pinion via the rotation center axis. The pinion is a sliding door braking system that rotates integrally with the rotation center shaft and receives the braking force from the braking brake part only when rotating to one side by the action of the built-in one-way clutch. The rack is slidably engaged with the guide rail portion of the hanger rail, and includes a set of rack fixtures that engage with the guide rail portion. Wherein the securing by sandwiching the longitudinal direction.

  Further, the sliding door braking system according to the present invention is a sliding door braking device that reduces the closing speed of the sliding door by cooperating with the rack arranged along the opening / closing direction of the sliding door on the hanger rail that suspends and supports the sliding door. The sliding door braking device includes a pinion that can mesh with the rack, a rotation center axis of the pinion, and a braking brake unit that applies a braking force to the pinion via the rotation center axis. The sliding door braking system that receives the braking force from the braking brake part by rotating together with the rotation center shaft only when rotating in one direction by the action of the one-way clutch, and the rack can slide on the guide rail part of the hanger rail And a rack fixture that engages with the guide rail portion, bends the end of the rack fixture to form a bent portion, and the rack has a rack fixture. Curved portions slits to form an insertable, characterized in that to fix the rack fixture inserting the bent portion to the rack of the slit in the guide rail section.

  The rack fixing structure according to the present invention is a structure for fixing a rack that meshes with a pinion provided on the sliding door side to brake the sliding door, and the rack is slidably engaged with the guide rail portion in the opening / closing direction of the sliding door. In addition, the rack is clamped in the longitudinal direction and fixed with a set of rack fixtures engaged with the guide rail portion.

  The rack fixing structure according to the present invention is a structure for fixing a rack that meshes with a pinion provided on the sliding door side to brake the sliding door, and the rack is slidably engaged with the guide rail portion in the opening / closing direction of the sliding door. And a rack fixture that engages with the guide rail portion, and the bent portion of the rack fixture is formed by bending the end portion of the rack fixture and a slit into which the bent portion of the rack fixture can be inserted. Then, the rack is fixed to the guide rail portion by fixing a rack fixture having a bent portion inserted into the slit of the rack to the guide rail portion.

  As described above, the rack can be easily fixed to the guide rail portion using the rack fixture.

  Hereinafter, referring to FIG. 1 to FIG. 9 for one embodiment of the present invention, the rack 2 disposed along the opening / closing direction of the sliding door 1 and the closing speed of the sliding door 1 are reduced in cooperation with the rack 2. A sliding door braking system including the sliding door braking device A to be moved and the hanger rail 3 that suspends and supports the sliding door 1 so as to be opened and closed linearly will be described.

  FIG. 1 schematically shows a sliding door construction site, where 1 is a sliding door for right-handed use. A pair of front and rear door carts 4 are attached to the upper surface of the sliding door 1 via mounting bases 5, respectively. The sliding door 1 can be opened and closed by a pair of front and rear door wheels 4 traveling on the door wheel rail portion 6 in the hanger rail 3 having a substantially L-shaped cross-section, and the hanger rail 3 is inclined to the right. By being fixedly arranged, the sliding door 1 self-closes toward the left side by its own weight. A sliding door braking system is used to reduce the closing speed of the self-closing type sliding door 1.

  First, the sliding door braking device A will be described. The sliding door braking device A includes a pinion 7 that can mesh with the rack 2, and a device main body 8 to which the pinion 7 is attached and attached to the sliding door 1. In the present embodiment, the apparatus main body 8 is fixed to the mounting base 5 of the door wheel 4, and in order to reduce the closing speed of the right-side sliding door 1, in FIG. 1 and FIG. It is attached to the attachment base 5 of the door pulley 4 on the door end side.

  The apparatus main body 8 includes a rotation center shaft 9 of the pinion 7 on which the pinion 7 is mounted, and a brake brake portion 10 that applies a braking force to the pinion 7 via the rotation center shaft 9. Specifically, the rotation center shaft 9 is rotatably attached to the housing 11 via a bearing 12. Then, the pinion 7 is mounted on one end side projecting outward from the housing 11, and a braking force is applied from the brake brake unit 10 to the other end side located in the housing 11.

  The housing 11 is formed in a hollow shape with the back side opening being closed by a back cover 13. And the brake brake part 10 accommodated in the housing 11 is comprised as a hydraulic brake brake of a trochoid pump type. That is, an inner rotor 14 fixed to the other end portion of the rotation center shaft 9 and an outer rotor 15 positioned between the inner rotor 14 and the housing 11 and rotating in the same direction while meshing with the inner rotor 14 are provided. The gap S between the inner rotor 14 and the outer rotor 15 is filled with oil. A throttle valve 17 is provided in the middle of the oil passage groove 16 formed in the housing 11. When the throttle valve 17 is throttled, the braking force to the rotation center shaft 9 increases. The same braking force can be obtained by the same operation for both forward and reverse rotation. However, various known configurations can be adopted as the configuration of the brake brake unit 10.

  On the other hand, the pinion 7 attached to the one end side of the rotation center shaft 9 is formed with a tooth portion that meshes with the rack 2 on the outer peripheral surface thereof, but in the radial direction at the approximate center in the thickness direction of the pinion 7. The slit 24 is formed over the entire circumference, and the tooth portion is divided into two by the slit 24.

  The pinion 7 has a one-way clutch 18 built in the inner periphery thereof. Therefore, when the pinion 7 rotates in one direction, the pinion 7 rotates integrally with the rotation center shaft 9 by the one-way clutch 18. At this time, resistance is given to the oil flow by the throttle valve 17, so that a rotational load acts on the inner rotor 14, and as a result, the pinion 7 receives a braking force from the braking brake unit 10 via the rotation center shaft 9. . On the other hand, when the pinion 7 rotates in the reverse direction, the pinion 7 rotates idly with respect to the rotation center shaft 9, so that the rotation center shaft 9 does not rotate and therefore receives no braking force from the brake brake unit 10.

  Accordingly, the direction of the clutch 18 and, in turn, the mounting direction of the pinion 7 on the rotation center shaft 9 are set so that the pinion 7 receives the braking force (rotational load) from the braking brake portion 10 when the pinion 7 meshes with the rack 2 when the door is closed. It is necessary to decide. For this reason, the mounting direction of the pinion 7 is reversed between the right-handed sliding door 1 as shown in FIGS. 1 and 2 and the left-handed sliding door 1 as shown in FIG. 3.

  Further, in order to prevent the pinion 7 from coming off from the rotation center shaft 9, a protruding portion 19 that protrudes radially outward from the outer peripheral surface of the rotation center shaft 9 is provided at the tip of the rotation center shaft 9. Yes. The projecting portion 19 is configured to be retractable in the radial direction of the rotation center shaft, and the pinion 7 can be inserted into and retracted from the rotation center shaft 9 by bringing the projecting portion 19 into a retracted state. Details will be described below.

  The rotation center shaft 9 is hollow in a predetermined length region on the tip side. A pinion removal prevention tool 20 made of synthetic resin is inserted and fixed at the tip of the rotation center shaft 9. The pinion removal prevention tool 20 is formed in a vertically long shape along the axial direction of the rotation center shaft 9 and extends along the longitudinal direction (the axial direction of the rotation center shaft 9) on one end side. An arm portion 21 is formed, and the protruding portion 19 is formed at the distal end portion of the arm portion 21. The protruding portion 19 is formed so as to protrude from the distal end portion of the arm portion 21 to the outside in a substantially semicircular shape in plan view when viewed from the axial direction. Only the protrusion 19 is exposed to the outside in the axial direction from the end surface 9 a of the rotation center shaft 9, and the lower surface 19 a of the protrusion 19 is in contact with the end surface 9 a of the rotation center shaft 9. In other words, the pinion removal prevention device 20 is internally mounted on the rotation center shaft 9 with the other end portion side remaining, except for the protruding portion 19 on one end portion side. Note that the lower surface 19 a of the protrusion 19, that is, the surface facing the housing 11, is substantially orthogonal to the rotation center axis 9. On the other hand, on the upper surface side of the protruding portion 19, a tapered surface 19b is provided so that the protruding amount increases toward the lower surface 19a.

  Furthermore, the arm part 21 which has the protrusion part 19 in the front-end | tip part has a left-right symmetric relationship, and is formed in a pair of left and right, that is, a pair opposed to each other by 180 degrees. Thus, since the slit-shaped gap is formed between the both arm portions 21, the both arm portions 21 can be bent so as to approach and separate from each other, and the protruding portion 19 is formed on the rotation center shaft 9. It is possible to exit and exit in the radial direction.

  In the normal state, the protrusions 19 are separated from each other and protrude outward by a predetermined amount from the outer peripheral surface of the rotation center shaft 9, and the pinion 7 is removed from the rotation center shaft 9 by the lower surface 19 a of the protrusion 19. Is prevented. When a pressing force in the radial direction toward the center of the rotation center shaft 9 is applied to the projecting portion 19, the arm portion 21 is bent and the projecting portion 19 is retracted. That is, when both the arm portions 21 are bent and both projecting portions 19 come into contact with each other, the projecting portions 19 as a whole have a substantially circular shape in plan view, and the diameter thereof is equal to or slightly smaller than the diameter of the rotation center shaft 9. As a result, the pinion 7 can be taken in and out of the rotation center shaft 9. Further, after the pinion 7 is mounted, when there is no radial pressing force on the projecting portion 19, the arm portion 21 is not bent by the elastic restoring force of the arm portion 21, and the pinion is restored to the original state. Prevent the loss of 7.

  In addition, the other end side of the pinion drop prevention device 20 is inserted in the hollow portion of the rotation center shaft 9 in the axial direction and fixed with an adhesive. In order to secure the fixed state, Such a configuration is adopted.

  That is, a female screw portion 9 b is coaxially formed at the tip of the rotation center shaft 9, and the small protrusion 22 that can be engaged with the screw thread of the female screw portion 9 b is provided in addition to the pinion removal prevention tool 20. It is formed on the end side. When the pinion removal prevention tool 20 is inserted into the rotation center shaft 9, the small protrusion 22 engages with the thread and the pinion removal prevention tool 20 is locked. Due to the synergistic effect of the locking effect and the adhesive effect of the adhesive, the pinion removal preventing device 20 is firmly fixed to the rotation center shaft 9. The pinion removal prevention device 20 may be pushed into the rotation center shaft 9 until the lower surface 19a of the protrusion 19 abuts against the end surface 9a of the rotation center shaft 9, but the other end of the pinion removal prevention device 20 Since the slit 23 is formed along the longitudinal direction, the other end can be bent at the time of pressing. Therefore, even if the small protrusions 22 are formed, the pressing operation is easy.

  Next, the rack 2 will be described. As shown in FIG. 4, a guide rail portion 25 is formed on the upper surface of the hanger rail 3 over the substantially entire length, and is linearly open to the upper surface substantially in parallel with the door rail rail portion 6 described above. At the lower end of the rack 2, engaging portions 2 a that can engage with the guide rail portion 25 are provided on both sides, and the engaging portion 2 a engages with the guide rail portion 25, so that the rack 2 is It is configured to be slidable in the longitudinal direction of the hanger rail 3 while being guided by the guide rail portion 25. A tooth portion that meshes with the pinion 7 is formed on the upper end portion side of the rack 2, and the upper end portion side of the rack 2 protrudes upward from the upper surface opening of the guide rail portion 25.

  As shown in FIG. 2, a brush-like cushioning material 26 is attached to the door-tail side end of the rack 2 in order to absorb a collision sound at the start of meshing with the pinion 7. Moreover, only the door butt side edge part of the rack 2 is separately formed from the member which is easy to elastically deform rather than another site | part.

  In addition, as a measure for absorbing sound at the start of meshing, the following configuration can also be adopted. That is, as shown by the two-dot chain line in FIG. The shock-absorbing material 27 bisects the teeth on the outer peripheral surface in the thickness direction. In this case, as shown in FIG. 10, the rack 2 is formed with a wide width only at its door end 2 b, and the shock absorber 27 hits the rack 2 only at the start of meshing as indicated by a two-dot chain line, and thereafter As shown by the solid line, only the teeth located outside the cushioning material 27 are configured to mesh with the rack 2. Thus, at the start of meshing, the shock absorbing material 27 comes into contact with the rack 2 and absorbs sound. After the meshing, the shock absorbing material 27 does not come into contact with the rack 2 and the teeth of the pinion 7 directly mesh with the rack 2. Thus, the wear of the cushioning material 27 is prevented.

  On the other hand, on the hanger rail 3, a rack mounting position for right pulling and a rack mounting position for left pulling are determined in advance. Specifically, the right-hand rack mounting position is located at a position inside the predetermined length from the left end of the guide rail portion 25, and the left-hand rack mounting position is located at a position inside the predetermined length from the right end of the guide rail portion 25. , Respectively. That is, there is a rack mounting position at a position on the door bottom side of a predetermined length from the door end side end portion of the guide rail portion 25. FIG. 1 and FIG. 2 show the rack mounting position for the right pulling, and FIG. 3 shows the rack mounting position for the left pulling.

  And the sliding door braking system is equipped with the rack fixing means which can attach the rack 2 arbitrarily in any one attachment position, and can be removed. Specifically, a set of rack fixtures 28 are provided as rack fixing means. The rack fixture 28 is a long and narrow plate-like body that can be inserted into and engages with the guide rail portion 25, and is made of sheet metal in the present embodiment. One rack fixture 28b is located on the inner side (door end side) of the rack 2, and the other rack fixture 28a is located on the outer side (door side) of the rack 2, and both rack fixtures 28a and 28b The rack 2 is clamped and fixed in the longitudinal direction. Both rack fixtures 28a, 28b have threaded holes that pass therethrough, and the bolts 29 are screwed into the screw holes from above to fix the rack fixtures 28a, 28b against the upper surface of the guide rail 25. It is a configuration.

  Therefore, by loosening the bolts 29, the rack 2 can be easily fixed, and the outer rack fixture 28a, the rack 2, and the inner rack fixture 28b can be extracted in this order from the open end of the guide rail portion 25. . For example, when changing from the rack mounting position for right pulling shown in FIGS. 1 and 2 to the rack mounting position for left pulling shown in FIG. 3, from the other end of the guide rail portion 25 that is similarly opened. The rack 2 can be fixed by inserting the inner rack fixture 28b, the rack 2, and the outer rack fixture 28a into the guide rail portion 25 in this order and screwing the bolts 29 again. As described above, the rack fixing tool 28 can be used to attach the rack mounting position to any rack mounting position, and the rack mounting position can be easily changed from right pulling to left pulling and vice versa.

  Furthermore, the rack fixture 28a located outside the rack 2 includes a positioning portion 30 at the outer end thereof. The positioning portion 30 is formed by rivets, and the positioning portion 30 abuts against the end surface 25a of the guide rail portion 25, so that the rack fixture 28a is prevented from entering further inside. Corresponding to the position, the distance from the positioning portion 30 to the inner end of the rack fixture 28a is set. Therefore, the positioning portion 30 of the outer rack fixture 28a can be used as the end surface 25a of the guide rail portion 25 without the need to measure the rack mounting position that is determined in advance at a position inside the predetermined dimension from the end surface 25a of the guide rail portion 25 in advance. The rack 2 can be fixed accurately and easily at the rack mounting position.

  The construction method of the sliding door braking system of this embodiment comprised as mentioned above is demonstrated.

  First, the apparatus main body 8 and the pinion 7 are brought to the site in a separated state without being assembled. At this time, the hanger rail 3, the rack 2 and the rack fixture 28 are also taken apart. Then, the worker determines the pulling direction of the sliding door 1 at the site. Then, after determining whether to pull right or left, based on the determination result, the sliding door braking device A is assembled on the spot, and the rack 2 is attached to the rack mounting position of the hanger rail 3.

  First, the rack 2 is inserted together with the rack fixture 28 from the end of the guide rail portion 25, and the rack 2 is fixed at the rack mounting position using the positioning portion 30 of the outer rack fixture 28a. Then, the pinion 7 is mounted on the rotation center shaft 9 so that the mounting direction of the pinion 7 matches the pulling direction of the sliding door 1. At this time, by applying a radial pressing force to the projecting portion 19, the projecting portion 19 can be in a retracted state, and there is no need to attach a C-ring to the rotation center shaft 9 as in the prior art. Moreover, since the protrusion part 19 can be made into a retraction state by the bending of the arm part 21, the pinion 7 can be mounted | worn by hand, without using a tool. In addition, since the tapered surface 19b is provided on the upper surface side of the protruding portion 19, when the pinion 7 is pressed against the tapered surface 19b of the protruding portion 19 from above in the axial direction as shown in FIG. The arm portion 21 is automatically bent by the component force, and the projecting portion 19 can be in the retracted state. In this way, by manually pressing the pinion 7 against the rotation center shaft 9 in the axial direction, the pinion 7 can be easily mounted with one touch.

  On the other hand, since the lower surface 19a of the projecting portion 19 is substantially orthogonal to the rotation center axis 9, the pinion 7 can be reliably prevented from coming off after being mounted. In addition, since a pair of substantially semicircular projections 19 facing each other at about 180 degrees are provided and the pinions 7 can be locked over the entire circumference by both projections 19, the prevention of the removal is further ensured.

  Further, since the projecting portion 19 is retracted by utilizing the bending of the arm portion 21 of the pinion removal prevention device 20, the structure can be simplified, and the arm portion 21 is provided along the axial direction and projects to the tip portion thereof. Since the portion 19 is formed, the arm portion 21 can be easily bent, and the protruding and retracting amount of the protruding portion 19 can be increased, and the rotation center shaft 9 does not need to be enlarged.

  When the mounting direction of the pinion 7 is changed, or when the mounting direction of the pinion 7 is changed in advance, for example, when the mounting direction of the pinion 7 is wrong or when it is previously mounted for right pulling or left pulling, as shown in FIG. Then, both the projecting portions 19 are pressed by hand and brought into a retracted state, and the pinion 7 is removed from the rotation center shaft 9 as shown in FIG.

  In this way, the pinion 7 can be easily put in and out by hand without using a dedicated tool, so it can be easily applied to both the sliding door 1 for right pulling and the sliding door 1 for left pulling, and the pulling direction of the sliding door 1 on site. Thus, the sliding door braking device A can be attached to the sliding door 1 by setting the pinion 7 so as to conform to the above. Further, since it can be used for both the right pulling and the left pulling, it is not necessary to prepare two types of dedicated products for the pulling direction of the sliding door 1 as in the prior art, which is advantageous in terms of cost and management.

  Further, similarly for the rack 2, the pulling direction of the sliding door 1 is determined at the site, and either the right pulling position or the left pulling rack mounting position is selected and the rack is fixed to the mounting position. It can be easily attached using the tool 28. Accordingly, the hanger rail 3 and the rack 2 are not dedicated items for the pulling direction and can be used for both sliding doors 1. In addition, the rack 2 can be easily and accurately attached to the rack attachment position using the positioning unit 30, and the work burden at the site can be reduced. Of course, even when it is desired to change the rack mounting position, the rack 2 can be easily removed by loosening the bolts 29.

  In the above-described embodiment, the configuration in which the protrusion 19 is positioned outside the end surface 9a of the rotation center shaft 9 has been described. However, as shown in FIGS. A pair of window portions 31 may be provided so as to face each other, and the tip of the protruding portion 19 may be protruded radially outward from the opening window portion 31. In this embodiment, the entire pinion omission prevention tool 20 is embedded in the rotation center shaft 9. However, since the pinion omission prevention tool 20 is formed of a synthetic resin as described above, at the time of insertion, FIG. ) So that both arm portions 21 bend toward each other and can be easily inserted. Further, the protruding portion 19 automatically protrudes from the window portion 31 by the elastic restoring force of the arm portion 21. Even in this configuration, the protruding portion 19 can be easily retracted due to the bending of the arm portion 21, and the arm portion 21 is formed along the axial direction, so that the protruding and retracting operation of the protruding portion 19 is smooth.

  In addition, it is possible to prevent the pinion 7 from coming off by providing a horizontal hole penetrating the tip of the rotation center shaft 9 and inserting a so-called snap pin as the pinion removal preventing tool 20 into the horizontal hole.

  In addition to providing the pinion removal prevention tool 20 on the rotation center shaft 9 as described above, the pinion removal prevention tool 20 can be provided on the housing 11 of the apparatus body 8.

  For example, as shown in FIG. 13, the pinion removal prevention tool 20 is rotatably provided in the housing 11 so as to take a pinion fixing position and a pinion release position. Further, this rotation operation can be performed by picking the pinion drop prevention tool 20 by hand. Specifically, at the pinion fixing position, a predetermined portion of the pinion removal preventing device 20 abuts against the end surface 9a of the rotation center shaft 9 to prevent the pinion 7 from being removed from the rotation center shaft 9, and the pinion removal prevention device 20 is removed. By rotating the one end portion 20 a as a fulcrum and separating the predetermined portion from the end surface 9 a of the rotation center shaft 9, a pinion release position where the pinion 7 can be removed from the rotation center shaft 9 is obtained.

  Specifically, a pinion removal prevention device 20 is formed by bending a linear member such as a wire, and the pinion removal prevention device 20 is rotated by its one end 20 a being pivotally supported by the housing 11. it can. Further, the other end 20b can be inserted into the housing 11 so that the state of the pinion fixing position can be maintained. A U-shaped portion 20c is provided in the middle, and the horizontal portion 32 of the U-shaped portion 20c is a regulating portion that abuts against the end surface 9a of the rotation center shaft 9 at the pinion fixing position to regulate the pinion 7. . The length of the horizontal portion 32 is longer than the diameter of the rotation center shaft 9, so that the pinion 7 is prevented from coming off from the rotation center shaft 9 at the horizontal portion 32. Furthermore, the other end 20b is pulled out from the housing 11 by holding the pinion removal prevention tool 20 by hand, and the horizontal portion 32 is separated from the rotation center shaft 9 by rotating a predetermined angle with the one end 20a as a fulcrum. It can be extracted from the rotation center shaft 9. Even in this way, the pinion 7 can be attached to and detached from the rotation center shaft 9 by hand without using a tool.

  Various configurations can also be adopted for the rack fixture 28. For example, as shown in FIG. 14, only the outer rack fixture 28a is used, the inner end of the rack fixture 28a is bent upward in an L shape, and the slit 34 into which the bent portion 33 can be inserted. Is formed on the lower surface of the outer end of the rack 2. Then, the bent portion 33 is inserted into the slit 34, the rack 2 is inserted into the guide rail portion 25 together with the rack fixture 28a, and the rack 2 is similarly fixed to the guide rail portion 25 with bolts 29. Can be fixed. Further, the positioning portion 30 at the outer end portion of the rack fixture 28a is not formed by the rivet described above, but the outer end portion of the rack fixture 28 is bent downward as in this embodiment, and the folding It is good also as a structure which abuts on the end surface 25a of the guide rail part 25 as a positioning part 30 as a curved part.

  Furthermore, it is good also as a structure which uses the volt | bolt 35 as a rack fixing means. That is, as shown in FIG. 15, a plurality of screw holes 36 penetrating vertically are formed at the rack mounting positions for the right and left pulls of the hanger rail 3, and bolts corresponding to the lower surface of the rack 2 are also formed. A round hole 37 into which 35 can be engaged is formed. Then, the rack 2 is inserted into the guide rail portion 25, the bolt 35 is screwed into the screw hole 36 of the guide rail portion 25 from below, the tip of the bolt 35 is engaged with the round hole 37 of the rack 2, and the bolt 35 The rack 2 is pressed against the upper surface of the guide rail portion 25 with the tip of the bolt 35 and fixed. In this manner, the rack 2 can be arbitrarily attached to and detached from either of the two rack attachment positions using the bolts 35. Even in such a configuration, the rack 2 can be accurately mounted without measuring the rack mounting position.

  The sliding door braking device A can be used not only for reducing the closing speed of the sliding door but also for reducing the opening speed immediately before the door is fully opened, for example. It is also possible to attach the rack 2 to the movable side such as the sliding door 1 and attach the sliding door braking device A to the fixed side such as the hanger rail 3.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic which shows the state which used the sliding door braking device and sliding door braking system in one Embodiment of this invention for the sliding door for right pulling. The enlarged view. The enlarged view of the sliding door braking device and sliding door braking system which were used for the sliding door for left-handing. 2. PP sectional drawing of FIG. Sectional drawing which shows the sliding door braking device of the embodiment. The bottom view which shows the state which removed the back cover in the sliding door braking device. The schematic sectional drawing which shows the assembly state of the principal part of the sliding door braking device. The assembled state of the sliding door braking device is shown, (a) is a cross-sectional view showing a state before the pinion is mounted, and (b) is a state during the mounting of the pinion. The sectional view which shows the use condition of the sliding door brake device, (a) shows the state before removing the pinion, and (b) shows the state where the pinion is removed. The top view which shows the use condition of the sliding door braking device and sliding door braking system of other embodiment. Sectional drawing of the principal part of the sliding door braking device of other embodiment. The assembled state of the sliding door braking device is shown, (a) shows the state before the installation of the pinion removal prevention device, (b) shows the state during the installation of the pinion removal prevention device, and (c) shows the installation of the pinion removal prevention device. The schematic sectional drawing which shows a completion state, respectively. The sliding door braking device of other embodiment is shown, (a) is a top view which shows the state of a pinion fixed position, (b) is the same front view, (c) is a front view which shows the state of a pinion release position. The principal part of the sliding door braking system of other embodiment is shown, (a) is the state before rack mounting, (b) is a front view which shows a rack mounting state. The principal part of the sliding door braking system of other embodiment is shown, (a) is the state before rack mounting, (b) is a front view which shows a rack mounting state.

Explanation of symbols

  A ... Sliding door braking device, S ... Gap, 1 ... Sliding door, 2 ... Rack, 3 ... Hanger rail, 4 ... Door wheel, 5 ... Mounting base, 6 ... Door wheel rail, 7 ... Pinion, 8 ... Main body, 9 ... Rotation Central shaft, 10 ... brake brake section, 11 ... housing, 12 ... bearing, 13 ... back cover, 14 ... inner rotor, 15 ... outer rotor, 16 ... oil passage groove, 17 ... throttle valve, 18 ... one-way clutch, 19 DESCRIPTION OF SYMBOLS ... Projection part, 20 ... Pinion omission prevention tool, 21 ... Arm part, 22 ... Small protrusion, 23 ... Slit, 24 ... Slit, 25 ... Guide rail part, 26, 27 ... Buffer material, 28 ... Rack fixing tool, 29 ... Bolt, 30 ... positioning portion, 31 ... window portion, 32 ... horizontal portion, 33 ... bent portion, 34 ... slit, 35 ... bolt, 36 ... screw hole, 37 ... round hole

Claims (4)

  The sliding door (1) is closed by the cooperation of the rack (2) and the rack (2) arranged along the opening / closing direction of the sliding door (1) on the hanger rail (3) for supporting the suspension of the sliding door (1). A sliding door braking device (A) for reducing the speed, and the sliding door braking device (A) includes a pinion (7) meshable with the rack (2), a rotation center shaft (9) of the pinion (7), And a braking brake portion (10) for applying a braking force to the pinion (7) via the rotation center shaft (9). The pinion (7) is moved to one side by the action of the built-in one-way clutch (18). A sliding door braking system that rotates integrally with the rotation center shaft (9) and receives a braking force from the braking brake section (10) only when rotating, and the rack (2) is a guide rail section of the hanger rail (3) ( 25) is slidably engaged with the guide rail portion (25). Sliding door braking system comprising a pair of rack fastener (28) which engages, characterized in that fixed to sandwich the rack (2) in the longitudinal direction in the set of rack fastener (28) to.   The sliding door (1) is closed by the cooperation of the rack (2) and the rack (2) arranged along the opening / closing direction of the sliding door (1) on the hanger rail (3) for supporting the suspension of the sliding door (1). A sliding door braking device (A) for reducing the speed, and the sliding door braking device (A) includes a pinion (7) meshable with the rack (2), a rotation center shaft (9) of the pinion (7), And a braking brake portion (10) for applying a braking force to the pinion (7) via the rotation center shaft (9). The pinion (7) is moved to one side by the action of the built-in one-way clutch (18). A sliding door braking system that rotates integrally with the rotation center shaft (9) and receives a braking force from the braking brake section (10) only when rotating, and the rack (2) is a guide rail section of the hanger rail (3) ( 25) is slidably engaged with the guide rail portion (25). A rack fixture (28a) that engages with the rack fixture (28a), and the bent portion (33) is formed by bending the end of the rack fixture (28a), and the rack (2) is folded with the rack fixture (28a). A slit (34) into which the bent portion (33) can be inserted is formed, and the rack fixture (28a) in which the bent portion (33) is inserted into the slit (34) of the rack (2) is formed in the guide rail portion (25). Sliding door braking system characterized by fixing.   The rack (2) meshes with a pinion (7) provided on the sliding door side to brake the sliding door (1), and the rack (2) is a guide rail portion (25 in the opening / closing direction of the sliding door (1)). The rack (2) is clamped and fixed in the longitudinal direction by a pair of rack fixtures (28) that slidably engage with the guide rail portion (25). Construction.   The rack (2) meshes with a pinion (7) provided on the sliding door side to brake the sliding door (1), and the rack (2) is a guide rail portion (25 in the opening / closing direction of the sliding door (1)). ) Is slidably engaged, and is provided with a rack fixture (28a) that engages with the guide rail portion (25), and an end portion of the rack fixture (28a) is bent to form a bent portion (33). At the same time, a slit (34) into which the bent portion (33) of the rack fixture (28a) can be inserted is formed in the rack (2), and the bent portion (33) is inserted into the slit (34) of the rack (2). A rack fixing structure characterized in that the rack (2) is fixed to the guide rail part (25) by fixing the rack fixing tool (28a) to the guide rail part (25).

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