JP2006123840A - Stopper attaching structure of back door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the entering of water into the internal space of a back door from the peripheral edge of a stopper attaching port without separately providing a seal material at the stopper attaching area of the back door. <P>SOLUTION: The inner panel 3 of the back door is made of a resin. A thread section 41 is formed on the peripheral surface of a cylindrical stopper 21 made of an elastic body. The stopper attaching port 65 is formed on the inner panel 3. The peripheral edge of the stopper attaching port 65 has a screwing section 67, which extends in a manner to be fitted in the thread groove 41b of the thread section 41, on an approximately total circumference. A thread insertion port in which the thread 41a of the thread section 41 is inserted is formed between the starting end section and the final end section of the screwing section 67. The peripheral edge of the stopper attaching port 65 has a first wall section which extends by continuing from the thread insertion port, and also, comes into contact with the top section of the thread 41a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stopper mounting structure for mounting a stopper to a back door provided on a vehicle body.

  In general, for example, in a one-box type automobile, an opening is formed in substantially the entire rear surface, and the opening is opened and closed by a back door. In this type of automobile, a cylindrical stopper made of an elastic body is attached to the inner panel of the back door, and this stopper is brought into contact with the vehicle body so as to reduce the closing sound generated when the back door is closed. (For example, refer to Patent Document 1). In Patent Document 1, a screw portion is formed on the peripheral surface of the stopper, while a stopper mounting port is formed in the inner panel of the back door, and the periphery of the stopper mounting port is formed in a spiral shape that is screwed into the screw portion. Has been. Then, the stopper is attached to the back door by screwing the screw portion of the stopper into the periphery of the stopper attachment port. By screwing the stopper in this way and attaching it to the back door, after the back door is assembled to the vehicle body, it is possible to freely adjust the protrusion height of the stopper from the inner panel according to the screwing amount of the stopper Become.

In addition, a rubber sealing material is provided around the rear opening of the vehicle body so that water does not enter the vehicle interior from the vehicle rear opening that is generally opened and closed by the back door, and the stopper is provided when the back door is closed. It is attached to the inner panel of the back door so as to come into contact with the vehicle body outside the material.
Japanese Patent Laid-Open No. 9-300972 (page 2, page 3, FIG. 3)

  However, when the stopper is screwed onto the periphery of the stopper mounting opening as in Patent Document 1, for example, when water is splashed on the inner panel of the back door as in car washing, a sealing material is placed outside the stopper mounting opening. Since it is not provided, there is a risk that water may enter the internal space of the back door from between the screw portion of the stopper and the periphery of the stopper mounting opening. When water enters the internal space of the back door, the water adheres to the electrical components arranged in the internal space, leading to the failure of the electrical components, and water accumulates in the internal space, May occur.

  The present invention has been made in view of such a point, and the object of the present invention is to devise the shape of the periphery of the stopper mounting port, so that the stopper mounting portion of the back door can be changed to the inner space of the back door. The purpose of this is to prevent the ingress of water by suppressing the ingress of water.

  In order to achieve the above object, in the present invention, the inner panel is made of a resin having a high degree of freedom in setting the shape, and is inserted into the screw groove constituting the screw portion of the stopper around the periphery of the stopper mounting port of the inner panel. And a thread abutting portion that abuts on the top of the thread constituting the thread portion.

  Specifically, in the first aspect of the invention, when the back door provided on the vehicle body is closed, the substantially cylindrical stopper made of an elastic body that reduces the closing noise by contacting the vehicle body is attached to the back door. For mounting structure.

  The back door is configured by joining an outer panel and a resin inner panel so as to have an internal space, a screw portion is formed on a peripheral surface of the stopper, and the inner panel has a circular shape in a plan view. A stopper mounting port having a shape is formed, and a threaded portion extending in a spiral shape so as to be fitted into a screw groove constituting a screw portion of the stopper and screwed into the screw mounting portion is substantially formed on the periphery of the stopper mounting port. A screw thread insertion port is formed in which a screw thread constituting the screw portion is inserted when the screw portion of the stopper is screwed into the screw engagement portion, and the stopper of the screw thread insertion port is formed. The start and end portions of the screwing portion are formed on both sides of the screwing axis direction, and the screw thread abutting portion that contacts the screw thread top portion is screwed on the screw screw insertion port on the front side in the stopper screwing rotation direction. Connected to the mountain insertion slot The stopper is provided so as to extend along the direction in which the screw thread rotates, and the screw thread insertion portion is formed by the screw portion being screwed into the screw fitting portion and the screw thread top portion being in contact with the screw thread contact portion. It is set as the structure attached to a back door in the state which plugged up.

  According to a second aspect of the present invention, in the first aspect of the present invention, a resiliently deformable protrusion is provided in the radial direction of the stopper in the middle of the top of the thread of the threaded portion, and the threaded portion is screwed into the threaded portion. The protrusion abutting portion with which the protrusion abuts when being combined is provided so as to be continuous with the thread abutting portion and extend substantially outward in the radial direction of the stopper mounting opening.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the stopper includes a first stopper having a threaded portion that is a right-hand thread, and a left-side stopper having a shaft length different from that of the first stopper and the threaded portion being a left-hand thread. There are two types of stopper mounting ports, the first stopper mounting port having a right-hand threaded portion corresponding to the first stopper, and the left-hand threaded screwing corresponding to the second stopper. It is set as the structure provided with the 2nd stopper attachment port which has a part.

  According to the first aspect of the present invention, in the state where the stopper is attached to the back door, the threaded portion of the peripheral edge of the stopper attachment port fits into the thread groove in the screw portion of the stopper over the entire circumference. Seals between the peripheral surface and the stopper mounting opening. Furthermore, since the screw thread inserted into the screw thread insertion port is located on both sides of the screw thread insertion port in the stopper screwing axial direction, the screw thread insertion port has a start end and a terminal end. It is sandwiched from both sides. Moreover, the top of the screw thread inserted into the screw thread insertion port is brought into contact with the screw thread contact portion so that the screw thread insertion port is closed. Thereby, the space between the screw thread and the screw thread insertion port can also be sealed. Accordingly, since it is possible to prevent water from entering the internal space of the back door without providing a sealing material or the like at the stopper mounting portion of the back door, the stopper mounting structure can be made inexpensive.

  According to the invention of claim 2, when the screw portion of the stopper is screwed into the screwed portion, the protruding portion protruding from the screw portion is brought into contact with the protruding contact portion provided on the inner panel. Therefore, when the stopper is attached to the back door, the protrusion height of the stopper from the inner panel can be easily set to a predetermined height by screwing the stopper until the protrusion comes into contact with the protrusion contact portion. And, in a vehicle with a stopper attached, if it is necessary to adjust the height of the stopper protruding from the inner panel to a low level, if the stopper is further screwed from the state where the protrusion is in contact with the protrusion contact portion, The protrusion is elastically deformed and press-fitted into the screw thread insertion port, and the stopper is further screwed in. Therefore, the screwing operation of the stopper is not hindered by the protrusion, and the protrusion height of the stopper from the inner panel can be easily reduced. Can do.

  According to the invention of claim 3, when the second stopper is to be attached to the first stopper attachment port, the threaded portion on the periphery of the first stopper attachment port is for right-hand thread, while the screw portion of the second stopper is Since it is formed in a left-hand screw and the screwing directions of both are different, it cannot be attached. Moreover, even if it is going to attach a 1st stopper to a 2nd stopper attachment port, since the screwing direction differs similarly, it cannot attach. Thereby, the 1st stopper and 2nd stopper from which axial length mutually differs can be attached to a regular attachment port, respectively.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 2 shows a back door 1 that opens and closes an opening formed at the rear of a vehicle body of an automobile (not shown), and a stopper mounting structure according to an embodiment of the present invention is applied to the back door 1. The back door 1 includes an inner panel 3 and an outer panel 5 disposed outside the vehicle body of the inner panel 3, and both the inner panel 3 and the outer panel 5 are injection-molded with a resin material. In addition, you may shape | mold the outer panel 5 with steel plates other than a resin material, for example.

  A glass attachment opening 11 is formed in the outer panel 5, and a window glass 13 is attached to the glass attachment opening 11. A license plate accommodating portion 15 is provided at the lower portion of the outer panel 5. In FIG. 2, reference numeral 17 denotes a hinge mounting portion that supports the back door 1 so that it can be opened downward on the upper edge of the opening at the rear of the vehicle body.

  The outer peripheral edge of the inner panel 3 and the outer peripheral edge of the outer panel 5 are bonded with an adhesive. As shown in FIGS. 1, 3, and 4, the inner side of the inner panel 3 that is bonded to the outer panel 5 is generally bulged toward the vehicle interior, and between the inner panel 3 and the outer panel 5. An internal space 19 is formed. Although not shown, the internal space 19 accommodates a motor for a rear wiper, a lighting tool for a license plate, and the like.

  As shown in FIG. 2, an upper stopper 21 and a lower stopper 23 are attached to the right side in the vehicle width direction, and an upper stopper 25 and a lower stopper 27 are attached to the left side in the vehicle width direction. It is attached. These stoppers 21, 23, 25, and 27 are for reducing the closing sound of the back door 1 by contacting the panel material around the opening at the rear of the vehicle body, for example, when the back door 1 is closed. The structures of the upper stoppers 21 and 25 and the mounting structure of the stoppers 21 and 25 to the back door 1 are the same. Similarly, the structures of the lower stoppers 23 and 27 and the back doors of the stoppers 23 and 27 are the same. Since the mounting structure to 1 is the same, the structure of the stoppers 21 and 23 on the right side of the vehicle body and the mounting structure will be described below.

  The upper stopper 21 is formed by molding an elastic body such as rubber in a substantially cylindrical shape. A one-side tapered surface 29 extending so as to decrease in diameter toward the one end side is formed on the peripheral surface on one side in the axial direction of the upper stopper 21 (the lower side in FIG. 6A). A flat surface 31 extending in a direction substantially orthogonal to the axis is continuous with one end in the axial direction. A convex portion 33 protruding in the axial direction is formed at the central portion of the flat surface 31, and an outer concave portion 35 is formed on the outer peripheral side of the convex portion 33 of the flat surface 31. Further, an inner concave portion 37 is formed at the central portion of the convex portion 33.

  On the other side in the axial direction of the upper stopper 21 (upper side in FIG. 6A), a small-diameter portion 39 having a smaller diameter than the other axial end of the one-side tapered surface 29 is formed. A threaded portion 41 is formed. That is, the peripheral surface of the small diameter portion 39 is provided with a protruding portion that protrudes in the radial direction and extends in a spiral shape. A thread 41a of the thread portion 41 is formed by the protruding portion, and a thread groove 41b of the thread portion 41 is formed by a portion between the thread 41a adjacent in the axial direction of the small diameter portion 39.

  Further, the start end portion 41c of the screw portion 41 is positioned at the other end portion in the axial direction of the small diameter portion 39, and the screw portion 41 is continuous from the start end portion 41c toward the one end portion in the axial direction of the small diameter portion 39. 41 d is positioned at one end of the small diameter portion 39 in the axial direction. As will be described in detail later, the screw portion 41 is screwed into the screwed portion of the inner panel 3 from the start end portion 41c, and when screwed into the screwed portion, the stopper 21 is moved to the right around the axis. By rotating in the direction (stopper screw turning direction), the screw is moved in the screw axis direction and screwed into the screwed portion. That is, the screw portion 41 of the upper stopper 21 is formed as a right screw.

  The front end surface in the height direction of the screw thread 41 a in the screw portion 41 is located on substantially the same plane as the other end portion in the axial direction of the one side tapered surface 29. Moreover, the cross-sectional shape of the thread 41a and the cross-sectional shape of the screw groove 41b are substantially the same rectangular shape. Furthermore, the other-side tapered surface 43 extending so as to decrease in diameter as it goes toward the other end side is continuous with the other end portion in the axial direction of the small-diameter portion 39.

  Further, a protrusion 45 that protrudes in the radial direction of the upper stopper 21 from a substantially central position between the start end portion 41c and the end end portion 41d of the screw portion 41 is provided on the top of the thread 41a in the screw portion 41. The projection 45 is configured to be elastically deformed and bent from the base end.

  Further, as shown in FIG. 7, the lower stopper 23 is a threaded portion comprising a convex portion 46, a one-side tapered surface 47, a small diameter portion 49, a thread 51a and a thread groove 51b, as in the case of the upper stopper 21. 51, the other side taper surface 53, and the protrusion 55 are provided. The dimension of the one-side tapered surface 47 in the lower stopper 23 is shorter than the dimension of the one-side tapered surface 29 in the upper stopper 21 in the axial direction. For this reason, the axial length of the lower stopper 23 and the axial length of the upper stopper 21 are different from each other. As will be described in detail later, the screw portion 51 is screwed by turning the lower stopper 23 in the left direction (stopper rotation direction) around the axis when screwing into the screw portion of the inner panel 3. It is formed so as to move in the advance axis direction and to be screwed into the screwing portion. That is, the screw portion 51 of the lower stopper 23 is formed as a left-hand screw opposite to the screw portion 41 of the upper stopper 21.

  On the other hand, on the lower side of the window glass 13 of the inner panel 3, as shown in FIGS. 3 and 4, an upper mounting seat 61 and a lower mounting seat 63 are provided at intervals in the vertical direction. As shown in FIG. 5A, the upper mounting seat 61 is formed with a substantially circular stopper mounting port 65. On the periphery of the stopper mounting opening 65, a screwing portion 67 is formed which is fitted into the screw groove 41b in the screw portion 41 of the upper stopper 21 and extends in a spiral shape so that the screw portion 41 is screwed. The threaded portion 67 is formed for a right-hand thread in which the threaded portion 41 of the upper stopper 21 is threaded.

  The start end portion 67 a of the screwing portion 67 is located in the vicinity of the lower portion of the stopper mounting port 65 in FIG. 3, and the screwing portion 67 makes one round of the stopper mounting port 65 and the end portion 67 b of the stopper mounting port 65. In the vicinity of the lower portion, it is located farther inward of the internal space 19 than the starting end portion 67a. That is, the start end portion 67a and the end end portion 67b of the screwing portion 67 are separated from each other in the stopper screwing axis direction.

  A first wall portion connecting the start end portion 67a and the end end portion 67b between the start end portion 67a and the end end portion 67b of the screw fitting portion 67 at the periphery of the stopper mounting port 65 and extending in the stopper screwing rotation direction. 69 is formed. The first wall 69 is positioned so as to contact the top of the screw thread 41a in the upper stopper 21 in a state where the screw portion 41 of the upper stopper 21 is screwed into the screwing portion 67. The wall 69 constitutes the thread contact portion of the present invention.

  A thread insertion port 71 into which the thread 41a of the upper stopper 21 is inserted is formed in a portion surrounded by the first wall portion 69 and the start end portion 67a and the end portion 67b of the screwing portion 67. Therefore, the start end portion 67a and the end portion 67b of the screwing portion 67 are located on both sides of the screw thread insertion port 71 in the stopper screwing axial direction. Further, the first wall portion 69 is continuous with the screw thread insertion port 71 and is positioned on the front side of the screw thread insertion port 71 in the screwing rotation direction.

  Further, the second wall portion 73 that extends outward in the substantially radial direction of the stopper mounting port 65 is continuous with the first wall portion 69. The second wall 73 is formed by screwing the threaded portion 41 of the upper stopper 21 into the threaded portion 67 and turning the upper stopper 21 clockwise so that the substantially central portion of the axial length of the small diameter portion 39 is a thread insertion opening. The projection 45 is formed so as to come into contact when reaching near 71, and the second wall 73 constitutes the projection contact of the present invention.

  Further, as shown in FIGS. 4 and 5B, the lower mounting seat 63 is formed with a stopper mounting port 75 as in the case of the upper mounting seat 61, and screwed around the periphery of the stopper mounting port 75. A joint portion 77, a first wall portion 79, a screw thread insertion port 81, and a second wall portion 83 are formed. The threaded portion 77 is formed for a left-hand thread in which the threaded portion 51 of the lower stopper 23 is threaded.

  In FIGS. 4 and 5B, reference numerals 77a and 77b denote a starting end portion and a terminal end portion of the screwing portion 67, respectively.

  Next, a case where the upper stopper 21 is attached to the upper stopper attaching port 65 will be described. First, the start end portion 41c of the screw thread 41a in the screw portion 41 of the upper stopper 21 is inserted into the screw thread insertion port 71, and the upper stopper 21 is turned clockwise. When the upper stopper 21 is turned clockwise, the screw thread 41a is inserted into the screw thread insertion port 71, the screwing portion 67 is fitted into the screw groove 41b of the screw portion 41, and is screwed into the screw portion 41. When the upper stopper 21 is further rotated clockwise, the protrusion 45 of the upper stopper 21 comes into contact with the second wall 73 as indicated by a virtual line in FIG. The rotation operation of the upper stopper 21 is stopped in a state where the projection 45 is in contact with the second wall portion 73, and the upper stopper 21 is attached to the stopper attachment port 65 in this state. That is, by screwing until the protrusion 45 comes into contact with the second wall portion 73, it is possible to obtain a predetermined height without measuring the protruding height of the upper stopper 21 from the inner panel 3.

  In the state where the upper stopper 21 is attached to the stopper attachment port 65, the screwing portion 67 is formed over substantially the entire circumference of the stopper attachment port 65, so the screwing portion 67 extends over the entire circumference of the screw groove 41b. Thus, the space between the peripheral surface of the upper stopper 21 and the stopper mounting port 65 is sealed. Further, the thread 41a inserted into the thread insertion port 71 has a start end 67a and a terminal end 67b of the screwing portion 67 located on both sides in the stopper screwing axial direction. It is in a state of being sandwiched from both sides by the portion 67b. In addition, at this time, the first wall 69 comes into contact with the top of the screw thread 41a inserted into the screw thread insertion port 71, and the screw thread insertion port 71 is blocked. Thereby, the space between the screw thread 41a and the screw thread insertion port 71 is also sealed.

  When the lower stopper 23 is attached to the lower stopper attachment port 75, first, the start end portion 51c (shown in FIG. 7) of the screw thread 51a in the screw portion 51 of the lower stopper 23 is connected to the screw thread insertion port 81. And turn the lower stopper 23 counterclockwise. When the lower stopper 23 is turned counterclockwise, like the upper stopper 21, the screwing portion 77 is screwed with the screw portion 51, and when the lower stopper 23 is further turned counterclockwise, FIG. ), The protrusion 55 of the lower stopper 23 comes into contact with the second wall 83, and the rotation of the lower stopper 23 is stopped in this state. In FIG. 7, reference numeral 51 d denotes a terminal portion of the screw portion 51.

  When the lower stopper 23 is attached to the stopper attachment port 75, the space between the peripheral surface of the lower stopper 23 and the stopper attachment port 75 is sealed as in the case of the upper stopper 21, and the thread 51a and the screw The space between the mountain insertion port 81 is also sealed.

  In addition, after assembling the back door 1 to which the upper stopper 21 and the lower stopper 23 are attached to the vehicle body as described above, both the stoppers 21 and 23 are rotated to remove the stoppers 21 and 23 from the inner panel 3. The protruding height, that is, the protruding lengths of the stoppers 21 and 23 when the tip protrusions 33 and 46 of the stoppers 21 and 23 come into contact with the panel material around the opening at the rear of the vehicle body is adjusted. At this time, for example, when it is necessary to adjust the protrusion height of the upper stopper 21 from the inner panel 3 to be lower, the upper stopper 21 is further moved to the right from the state in which the protrusion 45 is in contact with the second wall portion 73. When turned in the direction, the protrusion 45 is elastically deformed and press-fitted into the screw thread insertion port 71, and the upper stopper 21 is further screwed in. Therefore, the screwing operation of the stopper 21 is not hindered by the protrusion 45.

  Therefore, according to the stopper mounting structure of the back door according to this embodiment, the stoppers 21 and 23 are attached to the stopper mounting ports 65 and 75 with the peripheral surfaces of the stoppers 21 and 23 and the stopper mounting ports 65 and 75. It is possible to seal the gap between the screw threads 41a and 51a and the screw thread insertion ports 71 and 81. Thereby, since it can suppress that water permeates into the internal space 19 of the back door 1 without providing a sealing material etc. in the attachment site | part of the stoppers 21 and 23 in the back door 1, attachment of the stoppers 21 and 23 is possible. The structure can be made inexpensive.

  Further, when the back door 1 is closed and the stoppers 21 and 23 are in contact with the panel member of the vehicle body, the stoppers 21 and 23 are made of an elastic body so that the length is shortened and the outer diameter is increased. Deform. As a result, the threaded portions 67 and 77 are strongly fitted into the screw grooves 41b and 51b, and the first wall portions 69 and 79 are strongly brought into contact with the tops of the screw threads 41a and 51a, so that the seal is more reliable. It will be a thing.

  Further, when the screw portions 41, 51 of the stoppers 21, 23 are screwed to the screw portions 67, 77, the protrusions 45, 55 protruding from the screw portions 41, 51 are formed on the second wall portions 73, 83. Since they are in contact with each other, the stoppers 21 and 23 can be easily screwed in until the protruding height from the inner panel 3 reaches a predetermined height. When it is necessary to adjust the protrusion height of the stoppers 21 and 23 from the inner panel 3 to be low, the protrusions 45 and 55 do not hinder the screwing operation of the stoppers 21 and 23. The protruding height from the panel 3 can be easily reduced.

  Further, the screw portion 41 of the upper stopper 21 is formed as a right-hand thread, and the threaded portion 67 at the periphery of the upper stopper mounting port 65 is used for the right-hand screw, while the screw portion 51 of the lower stopper 23 is formed as a left-hand screw. At the same time, since the threaded portion 77 at the periphery of the lower stopper mounting port 75 is for left-handed threads, if the assembly operator mistakenly mounts the upper stopper 21 to the lower stopper mounting port 75, both Since the screwing directions are different, they cannot be attached. Similarly, when the lower stopper 23 is erroneously attached to the upper stopper attaching port 65, it cannot be attached in the same manner. Thereby, the upper stopper 21 and the lower stopper 23 having different lengths can be attached to the upper stopper attachment port 65 and the lower stopper attachment port 75 without any mistake. And the stopper mounting seat which the stopper mounting port 65, the screwing part 67, the screw thread insertion port 71, the 1st wall part 69, and the 2nd wall part 73 integrated continuously by having used the inner panel 3 as the resin material. 61 can be easily formed by injection molding.

  Depending on the shape of the back door 1, the long stopper 21 can be attached to the lower side and the short stopper 23 can be attached to the upper side, contrary to the above embodiment. Further, the upper stopper 21 can be a left-hand thread and the lower stopper 23 can be a right-hand thread. In these cases, it is a matter of course that the screwing portions 67 and 77 formed on the mounting seats 61 and 63 of the inner panel 3 also have a shape corresponding to the screwing direction of the stoppers 21 and 23.

  As described above, the stopper mounting structure for a back door according to the present invention can be applied to a back door of a one-box type automobile, for example.

It is the sectional view on the AA line in FIG. 3 of the state which attached the stopper. It is the perspective view which looked at the back door which concerns on embodiment of this invention from the vehicle body rear side. It is a perspective view which expands and shows the upper mounting seat vicinity of the back door seen from the inner panel side. It is a perspective view which expands and shows the lower attachment seat vicinity of the back door seen from the inner panel side. (A) It is a top view of the upper attachment seat of a back door, (b) is a top view of the lower attachment seat of a back door. An upper stopper is shown, (a) is a side view, (b) is a bottom view, and (c) is a plan view. It is a side view of a lower side stopper.

Explanation of symbols

1 Back door 3 Inner panel 5 Outer panel 21 Upper stopper (first stopper)
23 Lower stopper (second stopper)
41 Thread part 51 Thread part 41a Thread 41b Thread groove 45 Projection part 65 Stopper mounting port (first stopper mounting port)
67 Threaded portion 67a Start end portion 67b End portion 69 First wall portion (thread contact portion)
71 Thread insertion slot 73 Second wall (projection contact portion)
75 Stopper mounting port (second stopper mounting port)
77 Screwed part

Claims (3)

A stopper mounting structure that attaches a substantially cylindrical stopper made of an elastic body that makes contact with the vehicle body and reduces noise when the back door provided on the vehicle body is closed to the back door,
The back door is configured by joining the outer panel and the resin inner panel so as to have an internal space,
A threaded portion is formed on the peripheral surface of the stopper,
The inner panel is formed with a stopper mounting port having a circular shape in plan view,
At the periphery of the stopper mounting opening, a screwing portion extending in a spiral shape is formed so as to fit into a screw groove constituting the screw portion of the stopper and the screw portion is screwed together, and the stopper A screw thread insertion port is formed into which a screw thread constituting the screw part is inserted when the thread part of the screw thread is screwed into the screw thread part, and the screw thread insertion is performed on both sides in the stopper screwing axial direction of the screw thread insertion port. The start and end portions of the part are formed,
On the front side of the screw thread insertion port in the stopper screwing rotation direction, a screw thread contact portion that contacts the screw thread top portion is provided to be continuous with the screw thread insertion port and along the stopper screw rotation rotation direction,
The stopper is attached to the back door in a state in which the screw portion is screwed into the screwing portion, and the screw thread top portion is in contact with the screw thread contact portion to close the screw thread insertion port. Back door stopper mounting structure. In the stopper installation structure of the back door according to claim 1,
In the middle of the thread crest of the threaded portion, an elastically deformable projection is projected in the radial direction of the stopper,
A protrusion abutting portion with which the protrusion abuts when the threaded portion is screwed into the threaded portion is provided so as to continue to the thread abutting portion and extend substantially outward in the radial direction of the stopper mounting opening. Back door stopper mounting structure characterized by this. In the stopper mounting structure of the back door according to claim 1 or 2,
There are two types of stoppers: a first stopper whose threaded portion is a right-hand thread and a second stopper whose axial length is different from that of the first stopper and whose threaded portion is a left-hand thread.
The stopper mounting port also has a first stopper mounting port having a right-hand threaded portion corresponding to the first stopper, and a second stopper mounting having a left-hand threaded portion corresponding to the second stopper. A back door stopper mounting structure characterized by being provided with two types of openings.

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