JP4607055B2 - Interchangeable rail device for automatic door upper frame - Google Patents

Description

  The present invention relates to a replaceable rail device for an automatic door upper frame that enables replacement of an upper rail that is one of the suspended portions in the upper frame of the automatic door.

  A so-called hanger rail for hanging the door is provided in the upper frame of the automatic door. The hanger rail is made of an aluminum drawing material, and has a base portion that is fixed to the upper frame and a rail portion that is integrally continuous with the base portion. The open / close door of the automatic door is provided with a hanging metal structure at the upper end. The hanging bracket structure is configured to include a hanging bracket, a hanger roller, a screw, and the like. The hanging bracket structure is provided to suspend the open / close door. One end of the hanging bracket is fixed to the open / close door by screws. In addition, a hanger roller is rotatably attached to the other end of the hanging metal fitting. The main part of the hanger roller is made of synthetic resin.

  The hanger roller used to hang the open / close door and the rail of the hanger rail that receives it are naturally generated due to factors such as the weight of the open / close door, the frequency of opening and closing, the age of use, and the number of hanger rollers used. It is known to wear out. If the hanger roller or the rail is worn, due to the deformation of the cross-sectional shape or the like, a normal operation such as an unpleasant sound generated when the open / close door travels or a smooth travel cannot be obtained. Therefore, there is a need to repair before the wear proceeds to some extent.

  The wear of the hanger roller can be easily repaired by replacement. However, with respect to the wear of the rail, it is necessary to spend very much labor, time and cost that the hanger rail itself fixed in the upper frame has to be replaced, which is a serious problem. Therefore, the applicant of the present application provides a technique disclosed in Patent Document 1 below to solve the above problems. Hereinafter, the technology disclosed in Patent Document 1 will be briefly described.

  In FIG. 5A, a hanger rail 2 provided in the upper frame 1 of the automatic door includes a base member 3 fixed in the upper frame 1 and an upper rail member 4 that is detachable from the base member 3. And is configured. In other words, the hanger rail 2 is provided as an interchangeable rail device for an automatic door upper frame.

  The base member 3 is formed with an engaging groove groove 5 having an opening. A mounting portion 6 and a rail portion 7 are formed on the upper rail member 4. The upper rail member 4 is attached to and detached from the engaging groove 5 through the attachment portion 6. For attaching and detaching the upper rail member 4, the engaging part 6 is engaged with the engaging groove 5, and then the tip of the fixing screw 8 provided on the attaching part 6 is connected to the engaging groove 5 side. It can be fixed by pressing it on. Further, when the fixing screw 8 is loosened, it can be removed.

  At the upper end of the opening / closing door 9, a hanging metal structure 10 is provided. The hanging bracket structure 10 includes a hanging bracket 11, a hanger roller 12, a plurality of screws 13, and the like. One end of the hanging metal fitting 11 is fixed to the open / close door 9 with screws. A hanger roller 12 is rotatably attached to the other end of the hanging metal fitting 11. The hanger roller 12 is movably supported by the rail portion 7.

  Note that reference numeral 14 in the rail portion 7 indicates a rail. Further, the reference numeral 15 in the hanging metal fitting 11 indicates a vertical plate part, and the reference numeral 16 indicates a horizontal plate part. The portion of the rail 14 is formed thick. The rail portion 7 has a roller guide 17 having an L-shaped cross section in a portion ahead of the rail 14. The roller guide 17 is formed such that its longitudinal direction is the same length as the rail 14. As for the roller guide 17, the hanger roller 12 does not fall off from the rail 14, but the roller guide 17 is formed as a precaution (it is difficult to drop off, but when the hanger roller 12 is supported on the rail 14) The installation work is a little difficult).

By providing the hanger rail 2 as described above, that is, the replaceable rail device for the automatic door upper frame, there is an advantage that the workability related to the replacement can be remarkably improved as compared with the conventional ones.
Japanese Patent No. 2879557

  By the way, not only the disclosed technique of Patent Document 1 but also the conventional technique has a structural problem in that there is a risk that the positioning of the opening / closing door 9 in the vertical direction (vertical direction) P may be hindered. Yes. This problem will be specifically described.

  The open / close door 9 is suspended from the rail 14 portion of the upper rail member 4 by using the hanging metal structure 10. At the lower end of the opening / closing door 9, a guide convex portion 19 that is inserted into a guide rail 18 provided on the floor is formed to protrude (see FIG. 5B). When the opening / closing door 9 is opened and closed, the guide convex portion 19 is guided by the guide rail 18 and moves. The opening / closing door 9 is set such that the lower portion and the guide rail 18 have a predetermined gap dimension S (for example, the gap dimension S = 10 mm). For this reason, in order to secure a predetermined gap dimension S, alignment in the vertical direction P is performed on the suspension bracket structure portion 10 side (for example, a dimension adjustment region in a range of 6 mm upward and 7 mm downward relative to the position in the figure It has a structure that can be set).

  Although not particularly shown, the vertical plate portion 15 of the hanging metal fitting 11 is formed with a screw insertion hole that is long in the vertical direction P. The open / close door 9 can be aligned in the vertical direction P using this vertically long screw insertion hole. The open / close door 9 can be aligned in the horizontal direction Q in addition to the alignment in the vertical direction P. A screw insertion hole (not shown) that is long in the horizontal direction Q is formed in the horizontal plate portion 16 of the hanging metal fitting 11.

  In such a structure, the distance T between the upper end of the opening / closing door 9 and the head of the screw 13 for connecting and fixing the horizontal plate portion 16 in the hanging bracket 11 and the lower portion of the rail portion 7 is narrow, and thus the screw 13 Has a problem that it is difficult to align in the vertical direction P.

  In addition, if the interval T is too small, there is a problem that the attaching operation when the hanger roller 12 is supported on the rail 14 becomes very difficult.

  This invention is made | formed in view of the situation mentioned above, and makes it a subject to provide the interchangeable rail apparatus for automatic door upper frames which can aim at the improvement of workability | operativity.

The replaceable rail device for an automatic door upper frame according to claim 1 of the present invention, which has been made to solve the above-mentioned problems, comprises a metal plate mounted in an upper frame as an automatic door mounting frame and punched into a predetermined shape. A vertical plate portion formed by bending, and formed with a long screw insertion hole in the vertical (X) direction formed by extending two vertical plate members along the vertical (X) direction. And a hanging bracket having a horizontal plate portion formed along the horizontal (Y) direction, the open / close door is suspended, a long screw insertion hole is formed in the horizontal (Y) direction, and the vertical plate portion is fixed,
A bracket fixing screw for fixing the horizontal plate portion of the hanging bracket to the upper end of the open / close door;
A hanger roller that is formed of a synthetic resin material having wear resistance and that is formed in a circular arc shape over the entire circumference and is rotatably attached to one plate member of the suspension fitting;
A screw for attaching the vertical plate portion to the other plate member of the suspension fitting;
In an interchangeable rail device for an automatic upper frame of an automatic door that movably supports the hanger roller of a hanging bracket structure portion comprising:
The automatic rail upper frame replaceable rail device includes a base member, an upper rail member that is detachable from the base member , and a fixing screw for attaching and detaching the upper rail member.
The base member is formed by an aluminum drawing material so as to extend straight in a vertical (Z) direction with a predetermined length, a fixing portion that is fixed to the upper frame, an engagement portion with respect to the upper rail member, and a hollow A strength securing portion that is a structure, and is fixed to the upper frame,
The engaging portion of the base member is a portion that is attached to and detached from the upper rail member, and is wider on the back side than the opening width in the vertical (X) direction, with the upper engaging portion on the upper side and the lower engaging portion on the lower side. It is provided with a groove for engaging that forms an engaging portion, and is formed so that the bottom of the innermost groove is slightly inclined with respect to the vertical (X) direction. The engagement portion is formed so that the space is wider than the lower engagement portion, and an inclined vertical receiving wall is formed,
The upper engagement portion of the base member is formed with an upper engagement recess and an upper contact surface, and the lower engagement portion is formed with a lower engagement recess and a lower contact surface. The upper engaging recess and the lower engaging recess at the front end forming the engaging groove have a function as a retainer for the upper rail member by the upper engaging recess and the lower engaging recess, respectively. It has a retaining wall,
A groove portion in which a plurality of thread-like protrusions corresponding to the fixing screws for attaching and detaching the upper rail member is formed along the horizontal (Y) direction at the bottom portion of the groove groove. The bottom part of the groove part comes to abut against the front end face of the fixing screw for attaching and detaching the upper rail member,
The upper rail member is formed by an aluminum drawing material so as to extend straight in a vertical (Z) direction with a predetermined length, and a mounting portion that becomes a detachable portion with respect to the base member, and the mounting The upper part of the rail continuous on the upper side of the part, and the rail part continuous on the lower side of the mounting part,
The mounting portion of the upper rail member has a vertical plate portion that is engaged with the engaging groove, and the upper engagement portion and the lower portion are disposed at both ends in the vertical (X) direction of the vertical plate portion. An engaging portion is formed, a fixing screw hole for inserting the fixing screw is formed in the middle of the vertical plate portion, the upper engaging portion corresponds to the upper engaging portion, The lower engagement portion is configured to correspond to the lower engagement portion,
The rail upper extension of the upper rail member is formed in an inverted L-shape to restrict the upward movement of the hanger roller of the suspension bracket structure,
The rail extension part and the rail part are arranged according to the diameter of the hanger roller,
In the rail portion, a rail of a protrusion having a cross-sectional view shape is formed straight in the vertical (Z) direction above the horizontal (Y) direction end of the rail portion, and below the rail portion, A straight (Z) direction is formed on the opposite side of the end of the rail portion where the rail is formed, to the position of the bracket fixing screw, to ensure the strength of the rail. Forming a stepped portion formed by recessing the lower side of the rail by an amount sufficient for
The groove portion of the hanger roller is formed in accordance with the shape of the protrusion of the rail, and has a taper that descends outward on both sides of the groove portion of the hanger roller.

  According to the present invention having such a feature, the distance between the head portion of the screw that fixes the hanging bracket structure portion at the upper end of the opening / closing door and the lower portion of the rail portion of the rail member has hitherto been determined by the presence of the step portion. It becomes a structure which becomes larger than the space | interval of. The step portion is formed by recessing the lower side of the rail by an amount sufficient to ensure the strength of the rail. According to the present invention, the screw head does not disturb the vertical positioning, and the screw head does not disturb the hanger roller support. The structure can improve workability.

  A replaceable rail device for an automatic door upper frame according to a second aspect of the present invention is the replaceable rail device for an automatic door upper frame according to the first aspect, wherein the structure of the upper rail member is the large hanger roller. It is characterized by having a structure having the stepped portion regardless of whether it is a type corresponding to the above or a type corresponding to a hanger roller having a small diameter.

  According to the present invention having such a feature, the opening / closing door can be easily aligned in the vertical direction regardless of the size of the hanger roller.

  According to the first aspect of the present invention, it is possible to improve workability as compared with the prior art by forming the stepped portion. In addition, the formation of the stepped portion provides an effect that the opening / closing door can be installed at an optimum position.

  According to the present invention described in claim 2, regardless of the size of the hanger roller, in other words, regardless of the type of the replaceable upper rail member, the vertical positioning of the open / close door can be easily performed. There is an effect.

  Hereinafter, description will be given with reference to the drawings. FIG. 1 is a view showing an embodiment of a replaceable rail device for an automatic door upper frame according to the present invention. FIG. 2 is an enlarged cross-sectional view of the upper rail member and the hanging bracket structure portion, and FIG. 3 is an enlarged view of the step portion.

  In FIG. 1, in an upper frame 21 as a mounting frame for an automatic door, an interchangeable rail device 22 for an automatic door upper frame according to the present invention and a hanging bracket structure 24 screwed to the upper end of an opening / closing door 23 are provided. Is provided. The open / close door 23 is suspended by the replaceable rail device 22 for the automatic door upper frame and the hanging bracket structure 24, and can move in the vertical direction in FIG. If the direction is defined as P and the horizontal direction is defined as Q, the vertical direction on the paper is assumed to be R which cannot be indicated by an arrow here).

  The automatic door upper frame replaceable rail device 22 is a so-called hanger rail, a base member 25 fixed in the upper frame 21, an upper rail member 26 detachably attached to the base member 25, and an upper portion A fixing screw 27 for attaching and detaching the rail member 26 is provided. The hanging bracket structure 24 includes a hanging bracket 28, a bracket fixing screw 29 that fixes the hanging bracket 28 to the upper end of the opening / closing door 23, a hanger roller 30 that is rotatably provided on the hanging bracket 28, and other screws 31. And so on.

  As will be described later, the present invention is mainly characterized in that the structure is devised so that the distance between the upper rail member 26 and the metal fitting fixing screw 29 is larger (wider) than before.

  1 and 2, the base member 25 and the upper rail member 26 are made of an aluminum drawing material, and are formed so as to extend straight with a predetermined length in the vertical direction R on the paper surface. The base member 25 includes a fixing portion 32 fixed to the upper frame 21, a fitting portion 33 with respect to the upper rail member 26, and a strength securing portion 34 having a hollow structure. It is formed to become.

  The engaging portion 33 has an engaging concave groove 35. The engaging groove 35 is a part that can be attached to and detached from the upper rail member 26, and has a width on the back side that is wider than the opening width in the vertical direction P. An engaging portion 37 is formed. The engaging groove groove 35 is formed so that the groove groove bottom portion 38 which is the innermost part is slightly inclined with respect to the vertical direction P. The engaging groove 35 is formed so that the upper engaging portion 36 has a larger space than the lower engaging portion 37 due to the inclination of the groove bottom 38. The engaging concave groove 35 is formed on the inclined vertical receiving wall 39.

  The upper engagement portion 36 is formed with an upper engagement recess 40 and an upper contact surface 41. The lower engagement portion 37 is formed with a lower engagement recess 42 and a lower contact surface 43. A groove 44 corresponding to the fixing screw 27 is formed in the groove groove bottom 38. The groove 44 is formed along the horizontal direction Q. A plurality of thread-like protrusions are formed in the groove 44. The bottom portion of the groove portion 44 is not a sloped surface like the concave groove bottom portion 38, but the front end surface of the fixing screw 27 abuts on the surface. Reference numerals 45 and 45 denote retaining walls having a function of retaining.

  The upper rail member 26 is connected to a mounting portion 46 that is a detachable portion with respect to the base member 25, a rail extending portion 47 that is continuous above the mounting portion 46, and a lower side of the mounting portion 46. For example, it is formed to have a cross-sectional shape as shown in the figure. The attaching portion 46 has a vertical plate portion 49 that is engaged with the engaging concave groove 35. At both ends of the vertical plate portion 49 in the vertical direction P, an upper engagement portion 50 and a lower engagement portion 51 are formed. Further, a fixing screw hole (not shown) for inserting the fixing screw 27 is formed in the middle of the vertical plate portion 49. The upper engagement portion 50 corresponds to the upper engagement portion 36, and the lower engagement portion 51 corresponds to the lower engagement portion 37.

  The rail extension part 47 is formed in a shape that is an inverted L shape. The rail upper extension 47 is formed to restrict the upward movement of the hanger roller 30. The rail upper extension portion 47 and the rail portion 48 are arranged according to the diameter of the hanger roller 30. The rail portion 48 is formed along the horizontal direction Q.

  On the upper side of the rail portion 48, a rail 52 serving as a protruding line (in this case, a protruding line having a cross-sectional shape) is formed straight in the direction R perpendicular to the paper surface. On the lower side of the rail part 48, a step part 53 which is the gist of the present invention is formed. The step portion 53 is formed on the opposite side of the rail 52. Further, the stepped portion 53 is formed in accordance with the position of the metal fitting fixing screw 29. The step part 53 is formed straight in the direction R perpendicular to the paper surface. The step portion 53 is formed, for example, by denting the lower side of the rail 52 by an amount sufficient to ensure the strength of the rail 52.

  The rail portion 48 is formed so that the end portion in the horizontal direction Q becomes the rail 52. The rail portion 48 is formed such that the roller guide 17 (see FIG. 5) as in the conventional example does not exist. Of course, if there is no roller guide in the rail portion 48, it is possible to improve the workability of the attachment work when the hanger roller 30 is supported on the rail 52, and to reduce the material, resulting in a very useful structure. is there. Here, the removal of the hanger roller 30 will be briefly described. When an external force in the removal direction is applied to the hanger roller 30, the hanger roller 30 moves obliquely upward in an attempt to get over the rail 52 having a cross-sectional view. However, the presence of the rail extension 47 prevents the upward movement of the rail, and as a result, disengagement is restricted. Therefore, it can be seen that the roller guide 17 (see FIG. 5) as in the conventional example is unnecessary.

  The hanging metal fitting 28 has a vertical plate portion 54 and a horizontal plate portion 55. The vertical plate portion 54 and the horizontal plate portion 55 are formed by bending a metal plate punched into a predetermined shape. The vertical plate portion 54 is formed along the vertical direction P, and the horizontal plate portion 55 is formed along the horizontal direction Q. At the end of the vertical plate portion 54, there are a plurality of screws 31, which are a plate member 56 for a suspension wheel / connecting bracket fixed to a timing belt (not shown), and a plate member 57 as a portion to which the hanger roller 30 is rotatably attached. It is fixed by. A plurality of screw insertion holes (not shown) are formed at the end of the vertical plate portion 54. The screw insertion hole is formed long in the vertical direction P. The horizontal plate portion 55 is a portion that is fixed to the upper end of the open / close door 23, and has a screw insertion hole (not shown) through which the metal fitting fixing screw 29 is inserted. The screw insertion hole is formed long in the horizontal direction Q.

  The hanger roller 30 is formed of a wear-resistant synthetic resin material (which naturally includes a bearing and a shaft portion in addition to the resin portion). The hanger roller 30 has a groove 58 that is recessed in an arc shape over the entire circumference. The groove 58 is formed in accordance with the shape of the rail 52 from the viewpoint of prevention of detachment and wear resistance. Although not particularly limited, the hanger roller 30 has a taper indicated by reference numeral 59 on both sides of the groove portion 58.

  The taper 59 is formed as a useful portion when the arrangement of the rail upper extension 47 is as close as possible to the hanger roller 30. In other words, the hanger roller 30 is attached by rotating around the position of the rail 52 at the time of attachment, and at this time, the taper 59 is useful in order not to hit the rail extension portion 47. It has become. By forming such a taper 59, not only the arrangement of the rail upper extension portion 47 but also the depth of the groove portion 58 can be set deep (a structure for preventing detachment).

  Next, an operation for attaching the upper rail member 26 to the base member 25 will be described.

  The vertical plate portion 49 is inserted into the engaging groove 35 from the opening of the engaging groove 35 so that the upper engaging portion 50 and the lower engaging portion 51 are respectively connected to the upper engaging portion 36. The lower engagement portion 37 is loosely fitted. Specifically, the vertical plate portion 49 is inserted into the engagement groove 35 from the upper engagement portion 50 side by inclining the upper engagement portion 50 side toward the engagement groove 35. First, the upper engaging portion 50 is loosely fitted into the upper engaging recess 40. Then, after the lower engagement portion 51 is inserted to the position just above the lower engagement recess 42, the inserted lower engagement portion 51 is dropped into the lower engagement recess 42 and loosely fitted.

  From such a loosely fitted state, the fixing screw 27 inserted through the fixing screw hole (not shown) of the vertical plate portion 49 is screwed into the groove portion 44. When the front end surface of the fixing screw 27 abuts against the bottom of the groove 44 and a pressing force is generated, and the screwing of the fixing screw 27 is continued, the vertical plate portion 49 moves toward the upper contact surface 41 and the lower contact surface 43. Move to. By this movement, the upper engagement portion 50 and the lower engagement portion 51 and the upper contact surface 41 and the lower contact surface 43 are pressed and locked. Thus, the upper rail member 26 is attached to the base member 25, and a series of operations is completed.

  Subsequently, an operation of attaching the hanging bracket structure 24 to the upper rail member 26 will be described.

  The hanger roller 30 is inserted into the opening between the rail upper extension portion 47 and the rail portion 48 and the groove portion 58 of the hanger roller 30 is hooked on the rail 52. When the hanger roller 30 is rotated around the position of the rail 52, the hanger roller 30 is accommodated in the upper rail member 26. Thereby, the attachment work of the hanging bracket structure part 24 is completed.

  According to the present invention, the distance U between the rail part 48 of the upper rail member 26 and the metal fitting fixing screw 29 of the suspension metal structure 24 is made larger (wider) than the conventional distance T by the formation of the step part 53. (Interval U> interval T). Accordingly, the head of the metal fitting fixing screw 29 does not get in the way when the opening / closing door 23 is aligned in the vertical direction P, and the metal fixing screw 29 is also used when the hanger roller 30 is attached and supported. As a result, the workability can be improved as compared with the conventional example. Moreover, the opening / closing door 23 can be installed at an optimum position by forming the stepped portion 53.

  Next, another example of the upper rail member and the suspension bracket structure will be described with reference to FIG. FIG. 4 is a cross-sectional view showing an example of a hanger roller having a small diameter.

  In FIG. 4, the hanger structure 24 'has a hanger roller 30' having a smaller diameter than that described above. The upper rail member 26 'is also formed so that the position of the rail upper extension portion 47' is on the rail portion 48 side so as to correspond to the hanger roller 30 '. A stepped portion 53 is formed in the rail portion 48 as described above. Since the effect of the stepped portion 53 is the same as described above, the description thereof is omitted here.

  In addition, it goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

It is sectional drawing which shows one Embodiment of the replaceable rail apparatus for automatic door upper frames of this invention. It is an expanded sectional view of an upper rail member and a suspension metal fitting structure part. It is an enlarged view of a level | step-difference part. It is an expanded sectional view of the upper rail member and hanging bracket structure part (type with a small diameter of a hanger roller) used as another example. (A) is sectional drawing of the replaceable rail apparatus for automatic door upper frames of a prior art example, (b) is a figure of an opening-and-closing door lower part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Upper frame 22 Interchangeable rail apparatus for automatic door upper frames 23 Opening and closing door 24, 24 'Suspension bracket structure 25 Base member 26, 26' Upper rail member 27 Fixing screw 28 Suspension bracket 29 Fixing bracket screw 30, 30 ' Hanger roller 31 Screw 32 Fixed portion 33 Engagement portion 34 Strength securing portion 35 Engagement groove 36 Upper engagement portion 37 Lower engagement portion 38 Recess groove bottom 39 Vertical receiving wall 40 Upper engagement recess 41 Upper Contact surface 42 Lower engagement recess 43 Lower contact surface 44 Groove portion 45 Retaining wall 46 Mounting portion 47, 47 ′ Rail extension portion 48 Rail portion 49 Vertical plate portion 50 Upper engagement portion 51 Lower engagement portion 52 Rail 53 Stepped portion 54 Vertical plate portion 55 Horizontal plate portion 56, 57 Plate portion 58 Groove portion 59 Taper T, U Interval

Claims (2)

It is formed by bending a metal plate that is mounted in an upper frame as an automatic door mounting frame and punched into a predetermined shape, and is formed along the vertical (X) direction with two plate members at the end. A vertical plate portion that is fixed in a stacked manner and has a long screw insertion hole formed in the up and down (X) direction, and a screw insertion hole that is formed along the horizontal (Y) direction to hang the open / close door and that is long in the horizontal (Y) direction. A hanging fitting having a horizontal plate portion formed and fixed to the vertical plate portion;
A bracket fixing screw for fixing the horizontal plate portion of the hanging bracket to the upper end of the open / close door;
A hanger roller that is formed of a synthetic resin material having wear resistance and that is formed in a circular arc shape over the entire circumference and is rotatably attached to one plate member of the suspension fitting;
A screw for attaching the vertical plate portion to the other plate member of the suspension fitting;
In an interchangeable rail device for an automatic upper frame of an automatic door that movably supports the hanger roller of a hanging bracket structure portion comprising:
The automatic rail upper frame replaceable rail device includes a base member, an upper rail member that is detachable from the base member , and a fixing screw for attaching and detaching the upper rail member.
The base member is formed by an aluminum drawing material so as to extend straight in a vertical (Z) direction with a predetermined length, a fixing portion that is fixed to the upper frame, an engagement portion with respect to the upper rail member, and a hollow A strength securing portion that is a structure, and is fixed to the upper frame,
The engaging portion of the base member is a portion that is attached to and detached from the upper rail member, and is wider on the back side than the opening width in the vertical (X) direction, with the upper engaging portion on the upper side and the lower engaging portion on the lower side. It is provided with a groove for engaging that forms an engaging portion, and is formed so that the bottom of the innermost groove is slightly inclined with respect to the vertical (X) direction. The engagement portion is formed so that the space is wider than the lower engagement portion, and an inclined vertical receiving wall is formed,
The upper engagement portion of the base member is formed with an upper engagement recess and an upper contact surface, and the lower engagement portion is formed with a lower engagement recess and a lower contact surface. The upper engaging recess and the lower engaging recess at the front end forming the engaging groove have a function as a retainer for the upper rail member by the upper engaging recess and the lower engaging recess, respectively. It has a retaining wall,
A groove portion in which a plurality of thread-like protrusions corresponding to the fixing screws for attaching and detaching the upper rail member is formed along the horizontal (Y) direction at the bottom portion of the groove groove. The bottom part of the groove part comes to abut against the front end face of the fixing screw for attaching and detaching the upper rail member,
The upper rail member is formed by an aluminum drawing material so as to extend straight in a vertical (Z) direction with a predetermined length, and a mounting portion that becomes a detachable portion with respect to the base member, and the mounting The upper part of the rail continuous on the upper side of the part, and the rail part continuous on the lower side of the mounting part,
The mounting portion of the upper rail member has a vertical plate portion that is engaged with the engaging groove, and the upper engagement portion and the lower portion are disposed at both ends in the vertical (X) direction of the vertical plate portion. An engaging portion is formed, a fixing screw hole for inserting the fixing screw is formed in the middle of the vertical plate portion, the upper engaging portion corresponds to the upper engaging portion, The lower engagement portion is configured to correspond to the lower engagement portion,
The rail upper extension of the upper rail member is formed in an inverted L-shape to restrict the upward movement of the hanger roller of the suspension bracket structure,
The rail extension part and the rail part are arranged according to the diameter of the hanger roller,
In the rail portion, a rail of a protrusion having a cross-sectional view shape is formed straight in the vertical (Z) direction above the horizontal (Y) direction end of the rail portion, and below the rail portion, The end of the rail portion where the rail is formed is formed straight in the vertical (Z) direction in accordance with the position of the bracket fixing screw on the side opposite to the rail forming side to ensure the strength of the rail. Forming a stepped portion formed by recessing the lower side of the rail by an amount sufficient for
The groove part of the hanger roller is formed in accordance with the shape of the protrusion of the rail, and is formed with a taper descending outward on both sides of the groove part of the hanger roller. Interchangeable rail device. The replaceable rail device for an automatic door upper frame according to claim 1,
The structure of the upper rail member is a structure having the step portion regardless of whether it is a type corresponding to the hanger roller having a large diameter or a type corresponding to a hanger roller having a small diameter. Interchangeable rail device for automatic door upper frame.

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