JP5583559B2 - Vehicle door frame and method for manufacturing vehicle door frame - Google Patents

Description

  The present invention is a long member that is curved in a direction orthogonal to the longitudinal direction and protrudes toward the rear of the vehicle, and a surface that extends outward from the hollow portion in the vehicle width direction and faces the hollow portion. The present invention relates to a vehicle door frame provided with a frame member integrally including a superposed portion that contacts each other, and a method for manufacturing the vehicle door frame.

  Conventionally, as this type of vehicle door frame, for example, there is one described in Patent Document 1. Conventional door frames including the door frame described in Patent Document 1 include a long frame member connected to the door body. This frame member may be formed from a single plate material by roll molding or may be formed by extrusion molding. For example, in the case of the door frame described in Patent Document 1, the frame member is formed by roll molding, and a box-shaped cross-sectional portion that protrudes toward the rear of the vehicle as a whole by bending the plate material in a direction orthogonal to the longitudinal direction. have. In addition, the frame member has a portion (hereinafter referred to as a superposed portion) that extends from the box-shaped lateral cross-section portion to the outside in the vehicle width direction and that the opposing surfaces of the plate material contact each other. Further, the frame member has a design portion that extends from the overlapping portion in the vehicle front-rear direction and forms a part of the design surface of the vehicle.

  Here, in the door frame described in Patent Document 1, before the box-shaped cross section is formed, a gradual change trim of the plate material is performed (particularly, refer to FIG. 7A in the paragraph and the drawing). By performing such a gradual change trim, the width W in the vehicle width direction of the box-shaped cross section is gradually increased so as to become larger as it is located at a lower position in the longitudinal direction of the frame member, that is, closer to the coupling portion with the door panel. Will be changed. Accordingly, the portion positioned below the frame member is increased in the secondary moment of inertia accurately, while the portion positioned above is prevented from unnecessarily increasing the weight.

JP-A-7-329572

  However, in such a conventional vehicle door frame, in order to form a frame member, it is necessary to perform a trimming process of the plate material, that is, a cutting process, in addition to the bending process of the plate material. Therefore, the door frame processing process becomes complicated. Furthermore, since a cut piece is produced through the cutting process of the plate material, there arises a problem that the yield rate of the material is poor.

  An object of the present invention is to provide a vehicle door frame and a method for manufacturing the vehicle door frame, which can appropriately distribute the longitudinal moment of the cross-sectional secondary moment of the frame member without cutting the plate material. There is to do.

  In order to solve the above-mentioned problems, the invention described in claim 1 is a long member that is curved in a direction orthogonal to the longitudinal direction thereof, and is either on the vehicle rear side or the vehicle front side. A vehicle door frame comprising a frame member integrally including a projecting hollow part and a superposed part that extends outward from the hollow part in the vehicle width direction and that faces opposing surfaces, and constitutes the superposed part The part that is located in front of the projecting direction of the hollow part is divided in the vehicle width direction, and the area of the surface that is partitioned by the hollow part and perpendicular to the longitudinal direction is lower in the vertical direction. The main point is that the width of the frame member in the vehicle width direction is increased and the width is increased.

  According to the same configuration, the portion that constitutes the overlapping portion and that is located in front of the hollow portion in the protruding direction is divided in the vehicle width direction, so that the lower part in the vertical direction of the frame member is closer to the hollow portion. It is possible to reduce the area of the sectioned surface that is orthogonal to the longitudinal direction and to suitably increase the width of the frame member in the vehicle width direction. Thereby, the cross-sectional secondary moment of the frame member increases in the downward direction in the vertical direction. Therefore, the distribution of the moment of inertia of the cross section of the frame member in the longitudinal direction can be made appropriate without cutting the plate material.

  According to the vehicle door frame of the first aspect, the frame member is a long member formed of a single plate material, as in the invention of the second aspect. The plate material is bent back in a direction orthogonal to the longitudinal direction, and the overlapping portion extends from the hollow portion to the outside in the vehicle width direction, and has an aspect in which opposing surfaces of the plate material are in contact with each other. Can be Thus, the frame member which has a hollow part and a superposition | polymerization part can be formed by bending from one board | plate material.

  According to a third aspect of the present invention, in the vehicle door frame according to the first or second aspect, the overlapping portion includes a vehicle front side portion and a vehicle rear portion that form the overlapping portion at a predetermined position in the vehicle width direction. The gist is that the portions on the side are fixed to each other, and the overlapping portion is divided at the inner side in the vehicle width direction than the fixed portion.

If a portion constituting the overlapping portion and located in front of the hollow portion in the protruding direction is divided in the vehicle width direction, the portions on the outer side in the vehicle width direction from the divided portion may be separated from each other.
In this regard, according to the above-described configuration, the vehicle front side portion and the vehicle rear side portion that constitute the overlapping portion are fixed to each other, and the hollow portion protrudes forward in the vehicle width direction from the fixed portion. The site to be located is divided. Accordingly, it is possible to prevent the portions on the outer side in the vehicle width direction from the dividing portion from being separated from each other.

  According to the vehicle door frame of any one of claims 1 to 3, according to the invention of claim 4, the hollow portion is a connecting position of the frame member and the door body in the longitudinal direction. In the embodiment, the present invention can be embodied in such a manner that a portion on the inner side in the vehicle width direction and a portion on the outer side in the vehicle width direction constituting the hollow portion are in contact with each other. In this case, the width of the frame member in the vehicle width direction at the connection position can be accurately increased.

  According to a fifth aspect of the present invention, in the vehicle door frame according to any one of the first to fourth aspects, the door frame is applied to a door to which a door mirror is attached, and the door mirror is attached to the door. The rear portion of the vehicle constituting the overlapping portion is divided in the vehicle width direction within a range in which the bracket is disposed in the longitudinal direction, and the bracket faces the hollow portion. However, the gist is that it is gradually changed according to the protruding aspect of the hollow portion in the longitudinal direction.

  When the above-mentioned area of the surface defined by the hollow portion and the width of the frame member in the vehicle width direction are gradually changed in the longitudinal direction, and when a conventional one is used as a bracket for attaching the door mirror to the door Depending on the shape of the bracket, the hollow portion and the bracket may interfere with each other.

  In this regard, according to the above configuration, since the surface of the bracket that faces the hollow portion is gradually changed in the longitudinal direction, the interference between the hollow portion and the bracket can be suppressed.

  The invention according to claim 6 is a step of forming a long frame member, which is curved in a direction perpendicular to the longitudinal direction and protrudes to one of the vehicle rear and vehicle front. And a first step of forming a frame member that integrally includes an overlapping portion that extends outward in the vehicle width direction from the hollow portion and that faces facing each other, and a portion constituting the overlapping portion, the hollow portion A second step of forming a slit that divides a portion located in the front of the projecting direction in the vehicle width direction, and an area of a surface that is partitioned by the hollow portion and perpendicular to the longitudinal direction as it is vertically downward And a third step of pressing the hollow portion so as to increase the width of the frame member in the vehicle width direction.

  According to this method, first, in the first step, a long frame member having a hollow portion and a superposed portion protruding to either one of the vehicle rear and vehicle front is formed. Next, in the second step, a slit that divides a portion that constitutes the overlapping portion and is located in front of the hollow portion in the protruding direction in the vehicle width direction is formed. Next, in the third step, by pressing the hollow portion, the area of the surface that is partitioned by the hollow portion and orthogonal to the longitudinal direction is reduced toward the lower side in the vertical direction, and the vehicle width The width of the frame member in the direction is preferably increased. Thereby, it becomes possible to manufacture a frame member having a cross-sectional secondary moment that becomes larger downward in the vertical direction. Therefore, it is possible to manufacture a door frame in which the distribution of the moment of inertia of the cross section of the frame member in the longitudinal direction can be made appropriate without cutting the plate material.

  According to a sixth aspect of the present invention, in the vehicle door frame manufacturing method, the first step is a step of forming a long frame member from a single plate by bending. The plate member is bent back in a direction orthogonal to the longitudinal direction and protrudes to one of the vehicle rear and vehicle front, and the plate member extends outward from the hollow portion in the vehicle width direction. It can be embodied in such a manner that a frame member having a superposed portion where the opposing surfaces of each other come into contact with each other is formed. Thus, the frame member which has a hollow part and a superposition | polymerization part can be formed by bending from one board | plate material.

  According to an eighth aspect of the present invention, in the vehicle door frame manufacturing method according to the sixth or seventh aspect, prior to the second step, the overlapping portion is provided at a predetermined position in the vehicle width direction of the overlapping portion. The present invention further includes a fourth step of welding the vehicle front side portion and the vehicle rear side portion to be formed, and in the second step, the slit is formed on the inner side in the vehicle width direction than the predetermined position. Yes.

If the slit is formed in the second step and the rear portion constituting the overlapped portion is divided in the vehicle width direction, the portions on the outer side in the vehicle width direction from the divided portion may be separated from each other.
In this regard, according to the above method, first, the vehicle front side portion and the vehicle rear side portion constituting the overlapping portion are fixed to each other in the fourth step, and the vehicle width is set to be larger than the fixed portion in the subsequent second step. The rear part of the vehicle is divided on the inner side in the direction. Accordingly, it is possible to prevent the portions on the outer side in the vehicle width direction from the dividing portion from being separated from each other.

  The present invention provides a vehicle door frame and a method for manufacturing a vehicle door frame that can make the distribution of the moment of inertia of the cross section of the frame member in the longitudinal direction appropriate without cutting the plate material. Can do.

The front view which shows the front structure of the front door to which a door frame is applied about one Embodiment of the door frame for vehicles which concerns on this invention. The perspective view which shows the perspective structure which looked at the front side edge part from the vehicle interior about the frame member of the embodiment. Regarding the frame member of the embodiment, (a) a cross-sectional view showing a cross-sectional structure taken along line AA in FIG. 2, (b) a cross-sectional view showing a cross-sectional structure immediately after the slit processing step, and (c) B in FIG. Sectional drawing which shows the cross-section along a B line. (A) Sectional drawing which shows sectional structure in position shown to Fig.3 (a) about the frame member and bracket of the embodiment, (b) Sectional drawing which shows sectional structure in the position shown in FIG.3 (c).

  1 to 4, the vehicle door frame and the vehicle door frame manufacturing method according to the present invention are embodied as a door frame applied to a front door of a vehicle and a manufacturing method thereof. A form is demonstrated in detail.

  Hereinafter, the front direction of the vehicle is simply referred to as “front”, the rear side of the vehicle is simply referred to as “rear side”, the upper side in the vertical direction is simply referred to as “upward”, and the lower side in the vertical direction is simply referred to as “downward”. Further, the inside in the vehicle width direction is simply referred to as “inside”, and the outside in the vehicle width direction is simply referred to as “outside”.

  As shown in FIG. 1, the front door 1 is roughly composed of a door main body 2 that is attached to the vehicle main body so as to be openable and closable, a door frame 4 connected to an upper portion of the door main body 2, the door main body 2 and the door frame. 4 and a window glass 7 provided to be displaceable in the vertical direction.

  The door frame 4 is connected to the rear end of the door body 2 and extends obliquely rearward and upward, and is connected to the upper end portion of the vertical frame part 4a and extends forward. And an upper frame portion 4b extending in the vertical direction. The upper frame portion 4 b is connected to the front end of the door body 2. Further, a long partition frame portion 5 extending in the vertical direction is connected between a front side portion of the upper frame portion 4b and an upper portion of the door main body 2 immediately below the front portion. A bracket 6 for attaching a door mirror (not shown) to the front door 1 is attached to the front of the partition frame 5, below the upper frame 4 b, and in a space defined by the door body 2. Therefore, in the front door 1 of this embodiment, the window glass 7 is provided in the range from the vertical frame part 4a to the partition frame part 5 in the front-back direction.

Next, with reference to FIGS. 2-4, the manufacturing method of the door frame 4 of this embodiment and its structure are demonstrated.
The manufacturing method of the frame member 40 of this embodiment mainly includes a bending process, a welding process, a slit forming process, and a pressing process.

  First, as shown in FIGS. 1, 2, and 3 (a), in the bending process, a long frame member 40 is formed by roll-forming a single plate material. Specifically, the frame member 40 includes a hollow portion 41 that protrudes rearward when the plate material is bent back in a direction orthogonal to the longitudinal direction (in the case of FIG. 3A, a direction along the paper surface), and a hollow portion 41. It forms as what has the superposition | polymerization part 42 which extends outside from the part 41, and the surfaces where a board | plate material opposes contact | abut. In addition, as a board | plate material, what consists of an iron-type material is employ | adopted, However, This can also consist of an aluminum-type material.

Here, the cross-sectional structure of the frame member 40 immediately after the bending process will be described with reference to FIG.
As shown in FIG. 3A, the frame member 40 immediately after the bending process has the same structure at any position in the longitudinal direction. Specifically, the frame member 40 is bent from the inner end of the first flat surface portion 43 and the substantially flat first flat surface portion 43 extending from the front outer side to the rear inner side, that is, in the L direction in the drawing. An inner wall portion 44 extending rearward, a rear side wall portion 45 bent outward from the rear end of the inner wall portion 44, and an outer wall portion 46 bent forward from the outer end of the rear wall portion 45 and extending forward. have. Here, the front side end of the outer wall portion 46 is in contact with the rear end surface of the first plane portion 43 at a substantially central position of the first plane portion 43 in the L direction. In addition, the outer wall portion 46 has a front portion recessed inward, and a glass run (not shown) is attached to the outer surface thereof. The first flat portion 43, the inner wall portion 44, the rear wall portion 45, and the outer wall portion 46 constitute a hollow portion 41 in which a hollow space is formed.

  In addition, the frame member 40 is bent from the front end portion of the outer wall portion 46 and extends forward and outward along the L direction, a design portion 48 connected to the second flat portion 47, and a design. A third plane part 49 connected to the part 48 is provided.

  The design portion 48 is bent from the outer end of the second plane portion 47 and extends rearward, and a design base portion 48b that extends forward and is bent 180 degrees counterclockwise at the rear end of the rear base portion 48a. It has a front base 48c that is bent 180 degrees counterclockwise at the front end of the design surface 48b and extends rearward. Incidentally, the front base portion 48c has a portion protruding inward at the center position in the front-rear direction. Here, the rear base portion 48 a is located slightly outside the outer end of the first flat surface portion 43. Further, the outer side surfaces of the rear base portion 48a and the front base portion 48c are in contact with the inner side surface of the design surface portion 48b.

  The third flat surface portion 49 is bent from the rear side end of the front base portion 48c and extends downward, and has a substantially flat shape. Incidentally, the third plane portion 49 bends at the same position as the inner end of the second plane portion 47 in the L direction and extends forward, and further bends at its front end and extends forward and outward. Further, the front side surface of the second plane portion 47 abuts on the rear side surface of the first plane portion 43, and the rear side surface of the third plane portion 49 abuts on the front side surface of the first plane portion 43. The overlapping portion 42 is configured by a portion where the first flat portion 43, the second flat portion 47, and the third flat portion 49 are in contact with each other and overlapped with each other.

  Next, in the welding process, the first flat portion 43, the second flat portion 47, and the third flat portion 49 are welded to each other at a predetermined position in the vehicle width direction of the overlapping portion 42 (a position indicated by an arrow C in the drawing). To do. In this embodiment, resistance welding, more specifically, spot welding is used.

Here, the reason for performing the welding process will be described.
When the second flat surface portion 147 constituting the overlapped portion 142 is divided in the vehicle width direction by the slit processing step performed after the welding step, the portion outside the cut portion, that is, the overlapped portion side portion 147a and the first flat portion 143. May be separated from each other.

  Therefore, in this embodiment, first, the first flat surface portion 43 and the second flat surface portion 47 constituting the overlapped portion 42 are welded and fixed to each other by a welding process. Thus, the second flat portion 147 is divided. Thereby, the part 147a on the overlapping portion side and the first flat portion 143 are prevented from being separated from each other.

  Next, as shown in FIG. 3B, in the slit machining step, a slit 147c that divides the second flat portion 47 in the vehicle width direction is formed inside the predetermined position C. The slit 147c is formed within a range R shown in FIGS. That is, as shown in FIG. 1, the range R in which the slit 147c is formed is the same as the range in which the bracket 6 is disposed in the longitudinal direction.

  Next, in the press working step, the area of the surface S that is defined by the hollow portion 141 and is orthogonal to the longitudinal direction is reduced downward, and the width W of the frame member 40 in the vehicle width direction is reduced downward. The hollow part 141 is pressed so as to be enlarged. Thereby, the inner wall part 144 and the outer wall part 146 constituting the hollow part 141 are respectively positioned inward as the lower side. Moreover, the rear side wall part 145 which comprises the hollow part 141 becomes a thing with the short length in a vehicle width direction, below.

  Further, as shown in FIG. 3C, the entire inner wall portion 144 and the entire outer wall portion 146 constituting the hollow portion 141 are in contact with each other at the connecting position of the frame member 40 and the door body 2. Yes. That is, in the connection position, the rear side wall part 145 constituting the hollow part 141 constitutes a bent portion that is folded back from the rear side end part of the inner side wall part 144 to the rear side end part of the outer side wall part 146.

  By the way, in the structure which the area W of the said surface S divided by the hollow part 141 and the width W of the frame member 40 in a vehicle width direction are gradually changed in a longitudinal direction, it is conventional as a bracket for attaching a door mirror to a front door conventionally. When the one is adopted, the hollow portion and the bracket may interfere with each other depending on the shape of the bracket.

  Therefore, in the present embodiment, the surface of the bracket 6 that faces the hollow portion 141 (hereinafter referred to as the facing surfaces 161a and 162a) is gradually changed according to the protruding aspect of the hollow portion 141 in the longitudinal direction. The interference between the hollow portion 141 and the bracket 6 is suppressed.

  Specifically, at the position shown in FIG. 3A, as shown in FIG. 4A, the bracket 6 is positioned slightly outside the outer wall portion 46 of the frame member 40 and extends in the front-rear direction. The base 61 extends, and the extension 62 extends from the front end of the base 61 along the L direction. The extending portion 62 is bent at the outer end and extends forward. Here, the outer end of the extended portion 62 is located slightly inside the rear base portion 48 a of the design portion 48.

  Further, at the position shown in FIG. 3C, as shown in FIG. 4B, the extension portion of the bracket 6 is increased as the width W of the first flat portion 143 in the vehicle width direction is increased. 162 is enlarged in the vehicle width direction. Here, the base 161 is located slightly outside the outer wall 46 and extends in the front-rear direction. That is, the positions and shapes of the opposing surfaces 161a and 162a, which are the inner surfaces of the base portion 161 and the extending portion 162, are between the opposing surface 161a and the hollow portion 141, particularly the outer wall portion 146, at any position in the L direction. Is set in such a manner that a predetermined gap is formed. Incidentally, this gap is used to weld the bracket 6 and the frame member 40 together. Further, the outer end of the extended portion 62 is located slightly inside the rear base portion 48 a of the design portion 48.

  In addition, the 1st plane parts 43 and 143 are equivalent to the site | part of the vehicle front side which comprises the superposition | polymerization part based on this invention. Moreover, the 2nd plane parts 47 and 147 are equivalent to the site | part of the vehicle rear side which comprises the superposition | polymerization part based on this invention. Further, the inner side wall portions 44 and 144 correspond to a portion on the inner side in the vehicle width direction constituting the hollow portion according to the present invention. Moreover, the outer side wall parts 46 and 146 are corresponded to the site | part of the vehicle width direction outer side which comprises the hollow part based on this invention. Further, the facing surfaces 161a and 162a correspond to surfaces facing the hollow portion in the bracket according to the present invention. The bending process corresponds to the first process according to the present invention. The slit forming step corresponds to the second step according to the present invention. Further, the press working step corresponds to the third step according to the present invention. Further, the welding process corresponds to a fourth process according to the present invention.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In this embodiment, the 2nd plane part 147 which is the site | part of the back which comprises the superimposition part 142 is divided | segmented by the vehicle width direction, and is a surface divided by the hollow part 141, Comprising: It is orthogonal to a longitudinal direction The area of the surface S to be reduced is made smaller as it goes downward, and the width W of the frame member 40 in the vehicle width direction is made larger as it goes downward. As described above, the second flat surface portion 147 constituting the overlapping portion 142 is divided in the vehicle width direction, so that the area of the surface S is reduced downward and the width of the frame member 40 in the vehicle width direction. W can be suitably increased as it goes downward. Thereby, the cross-sectional secondary moment of the frame member 40 increases toward the lower side. Accordingly, the distribution of the moment of inertia of the cross section of the frame member 40 in the longitudinal direction can be made appropriate without cutting the plate material.

  (2) In the present embodiment, the first flat portions 43 and 143 and the second flat portions 47 and 147 are welded and fixed to the overlapping portions 42 and 142 at a predetermined position C in the vehicle width direction. It shall be divided | segmented inside the site | part fixed by welding. As a result, the overlapping portion 147a and the first flat portion 143 can be prevented from being separated from each other.

  (3) In the present embodiment, the hollow portion 141 includes the entire inner wall portion 144 and the entire outer wall portion 146 constituting the hollow portion 141 at the connection position of the frame member 40 and the door body 2 in the longitudinal direction. It shall be in contact with each other. Thereby, the width | variety of the frame member 40 in the vehicle width direction in the said connection position can be enlarged appropriately.

  (4) In this embodiment, the door frame 4 is applied to the front door 1 to which the door mirror is attached, and includes a bracket 6 for attaching the door mirror to the front door 1. Moreover, the 2nd plane part 147 shall be parted in the vehicle width direction within the range in which the bracket 6 is arrange | positioned in a longitudinal direction. Moreover, the bracket 6 shall change gradually the surface which opposes the hollow part 141 according to the protrusion aspect of the hollow part 141 in a longitudinal direction. Thus, since the surface facing the hollow part 141 in the bracket 6 is gradually changed in the longitudinal direction, the interference between the hollow part 141 and the bracket 6 can be suppressed.

  (5) In the manufacturing method of the vehicle door frame 4 of this embodiment, a bending process, a slit formation process, and a press process are provided. In the bending step, the long frame member 40 is formed from a single plate by bending, and the plate is bent back in a direction perpendicular to the longitudinal direction and protrudes backward. A frame member 40 having a portion 41 and a superposed portion 42 that extends outward from the hollow portion 41 and abuts opposite surfaces of the plate material is formed. In the slit forming step, a slit 147c that divides the second flat portion 47 constituting the overlapping portion 42 in the vehicle width direction is formed. In the pressing process, the area of the surface S, which is a surface defined by the hollow portion 141 and orthogonal to the longitudinal direction, is reduced toward the lower side, and the width W of the frame member 40 in the vehicle width direction is increased toward the lower side. The hollow portion 141 is pressed. Thereby, it becomes possible to manufacture the frame member 40 whose cross-sectional secondary moment increases toward the lower side. Therefore, it is possible to manufacture the door frame 4 in which the distribution of the moment of inertia of the cross section of the frame member 40 in the longitudinal direction can be made appropriate without cutting the plate material.

  (6) In the method for manufacturing the vehicle door frame 4 of the present embodiment, the first flat surface portion 43 and the second flat surface portion 47 are welded to each other at a predetermined position C in the vehicle width direction of the overlapping portion 42 prior to the slit machining step. The welding process is further provided. Further, in the slit processing step, a slit is formed inside the predetermined position C. Thereby, it is possible to suppress the portion 147a on the overlapping portion side and the first flat portion 43 from being separated from each other.

In addition, you may change the said embodiment as follows.
In the above embodiment, the case where the entire inner wall portion 144 and the entire outer wall portion 146 constituting the hollow portion 141 abut each other at the connecting position of the frame member 40 and the door body 2 in the longitudinal direction is illustrated. However, instead of this, at the connection position, the part on the inner side in the vehicle width direction and the part on the outer side in the vehicle width direction that constitute the hollow part are in contact with each other, or these parts are not in contact with each other. You can also. Even in these cases, the lower the vertical direction, the smaller the area of the surface S defined by the hollow portion and the greater the width W of the frame member in the vehicle width direction can be realized. it can.

  In the above embodiment, the overlapping portions 42 and 142 are fixed to each other by spot welding. However, the method for fixing the overlapping portions is not limited to this, and seam welding is adopted in addition to resistance welding. You can also Further, other welding may be used.

-The fixation aspect of the superposition | polymerization part is not restricted to welding, You may make it employ | adopt other methods, such as adhesion | attachment.
As described in the above embodiment, it is desirable to fix the vehicle front side portion and the vehicle rear side portion constituting the overlapping portion to each other. However, the present invention is not limited to this, and it is possible to prevent the respective parts constituting the overlapping portion from being fixed to each other.

  In the above embodiment, the frame member 40 is formed by roll molding. However, the form of the frame member having the hollow portion and the overlapped portion is not limited to this, and for example, the frame member may be formed by extrusion molding. Can be formed.

  In the above embodiment, the hollow portions 41 and 141 are illustrated as projecting toward the rear of the vehicle (see FIG. 3), but the projecting direction of the hollow portion according to the present invention is not limited to this, and projects toward the front of the vehicle. It can also be done.

  -The application range of this invention is not limited to the range illustrated in the said embodiment, ie, the range R including the connection position of the upper frame part 4b and the door main body 2 (refer FIG. 1). In addition, for example, the present invention can be applied to a predetermined range including a connection position between the vertical frame portion 4a and the door body 2. Further, the door to which the present invention is applied is not limited to the front door 1, and the present invention can also be applied to the rear door.

  DESCRIPTION OF SYMBOLS 1 ... Front door, 2 ... Door main body, 4 ... Door frame, 6 ... Bracket, 40, 140 ... Frame member, 41, 141 ... Hollow part, 42, 142 ... Overlapping part, 43, 143 ... First plane part (Polymerization) , 44, 144... Inner side wall (site in the vehicle width direction constituting the hollow portion), 46, 146... Outer wall portion (site in the vehicle width direction constituting the hollow portion) ), 47, 147... Second plane part (rear part of the vehicle constituting the overlapping part), 147c... Slit, 161a, 162a .. opposing surface (surface facing the hollow part in the bracket), S. C, a plane orthogonal to the longitudinal direction, C: a predetermined position (a position where the vehicle front side portion and the vehicle rear side portion constituting the overlapping portion are fixed to each other).

Claims (8)

A long member that is curved in a direction perpendicular to the longitudinal direction and protrudes to either the vehicle rear or the vehicle front, and extends from the hollow to the outside in the vehicle width direction. A vehicle door frame including a frame member integrally including a superposed portion where opposing surfaces abut each other,
The part that constitutes the overlapping part and is located in front of the projecting direction of the hollow part is divided in the vehicle width direction, and the lower part in the vertical direction is a surface partitioned by the hollow part with respect to the longitudinal direction. A vehicle door frame characterized in that the area of the orthogonal surface is reduced and the width of the frame member in the vehicle width direction is increased. The vehicle door frame according to claim 1,
The frame member is a long member formed from a single plate,
The hollow portion is formed by bending the plate material in a direction orthogonal to the longitudinal direction,
The overlapping portion extends from the hollow portion toward the outside in the vehicle width direction, and the opposing surfaces of the plate material are in contact with each other. The vehicle door frame according to claim 1 or 2,
A portion on the vehicle front side and a portion on the vehicle rear side constituting the overlapping portion at a predetermined position in the vehicle width direction are fixed to the overlapping portion,
The overlap portion is divided on the inner side in the vehicle width direction than the fixed portion. A vehicle door frame according to the present invention. In the vehicle door frame according to any one of claims 1 to 3,
The hollow portion is configured such that a portion on the inner side in the vehicle width direction and a portion on the outer side in the vehicle width constituting the hollow portion are in contact with each other at a connection position between the frame member and the door body in the longitudinal direction. Vehicle door frame. In the vehicle door frame according to any one of claims 1 to 4,
The door frame is applied to a door to which a door mirror is attached and includes a bracket for attaching the door mirror to the door;
The vehicle rear side portion constituting the overlapping portion is divided in the vehicle width direction within the range in which the bracket is disposed in the longitudinal direction,
The vehicle door frame is characterized in that a surface of the bracket facing the hollow portion is gradually changed according to a protruding aspect of the hollow portion in the longitudinal direction. A step of forming a long frame member, which is curved in a direction orthogonal to the longitudinal direction and protrudes to one of the vehicle rear and vehicle front, and the vehicle width direction from the hollow portion A first step of forming a frame member that integrally has an overlapping portion that extends outward and abuts opposing surfaces;
A second step of forming a slit that divides the portion that constitutes the overlapping portion and is located in front of the protruding portion of the hollow portion in the vehicle width direction;
The lower the vertical direction, the smaller the area of the surface that is defined by the hollow portion and orthogonal to the longitudinal direction, and the hollow portion is pressed so as to increase the width of the frame member in the vehicle width direction. A third step of processing;
A method for manufacturing a vehicle door frame. In the manufacturing method of the door frame for vehicles according to claim 6,
The first step is a step of forming a long frame member from a single plate material by bending, and the plate material is bent back in a direction orthogonal to the longitudinal direction so that the vehicle rear and front of the vehicle. Forming a frame member having a hollow portion protruding in any one of the above and a superposed portion that extends from the hollow portion to the outside in the vehicle width direction and abuts the opposing surfaces of the plate material. Method. In the manufacturing method of the door frame for vehicles of Claim 6 or Claim 7,
Prior to the second step, further comprising a fourth step of welding the vehicle front side portion and the vehicle rear side portion constituting the overlap portion at a predetermined position in the vehicle width direction of the overlap portion,
In the second step, the slit is formed on the inner side in the vehicle width direction than the predetermined position. A method for manufacturing a vehicle door frame.

Images