JP2014223918A - Supporting structure of headrest bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, in a supporting structure of a bracket provided in a conventional upper frame, a head cannot be protected by a head rest and an upper body cannot be protected by a side frame, therefore whiplash injury and the other injury of disease or the like are caused, thereby various measures are taken, though lack in each strength of the head rest and the side frame in emergency is really found, then improvement of the head rest and the side frame is required.SOLUTION: In a supporting structure of a headrest bracket, mounting wall pieces are formed on both ends in a longitudinal direction of a mounting part of an upper frame. Then, in the mounting part, one projection piece of a clinch side surface of a bracket, and an upper end and a lower end of the mounting part are welded. Also, a free end side on the mounting wall piece, and the other projection piece of the bracket are welded.

Description

  The present invention relates to a support structure for a headrest bracket (simply referred to as a bracket), and more particularly, a bracket provided on a vehicle upper frame and a headrest provided on a vehicle seat via a headrest support inserted into the bracket. In addition, the present invention relates to a support structure for a headrest bracket that can be ensured accurately in the event of a subsequent collision, a front collision, or an emergency during a side collision. And prior application 2010-199535 relates to an evolved structure.

  In the case of an emergency, when the head and / or neck cannot be protected by the headrest, or when the upper body cannot be protected by the seat back (upper frame, seat back frame), injuries such as whiplash and other diseases occur. It is known. Therefore, various measures are taken. However, in reality, it has been found that there are insufficient strength of the headrest (the same is also the case of insufficient strength of the bracket or the upper frame) and insufficient strength of the side frame in this emergency. An example thereof is shown in FIG. 26, and it is considered that the upper frame and / or the headrest stay are in a bent state (a bent state X) due to an impact, and apparently insufficient in strength.

  Therefore, an optimum and simple method for eliminating this lack of strength may be, for example, improvement of the welding strength between the upper frame and the bracket and the structure of the upper frame and / or the side frame. From this point of view, the conventional technology is examined.

  First, regarding the structure of the upper frame and the bracket, there is a “headrest support structure of a vehicle seat” disclosed in JP-A-2005-138754 (referred to as Document (1)). Further, there is a “seat back frame” disclosed in JP-A-7-31526 (referred to as document (2)). These inventions have a structure in which a bracket is welded to a flat mounting portion provided by crushing processing on an upper frame or a crushing mounting portion with a groove, and this welding is in one direction, and the surface side (vehicle The progression side). Therefore, at the time of impact, similarly to FIG. 26, the upper frame is in a state of being bent, and its strength is increased. Next, regarding the literature in which a replenishing rib is provided vertically on the bracket and the reinforcing rib is welded and supported on the flat mounting portion in the structure of the upper frame and the bracket, and the strength is improved, Japanese Unexamined Patent Application Publication No. 2002-315649, “Vehicle Seat back frame ”(referred to as document (3)). As described above, the present invention uses the reinforcing rib to improve the strength of the bracket or the upper frame.

  Further, with respect to the literature in which the strength is improved by the auxiliary means with the structure of the upper frame and the bracket, there is a “headrest support structure” of Japanese Patent Laid-Open No. 2008-207807 (referred to as reference (4)). In the present invention, a reinforcing plate is provided on the upper frame to improve the strength of the upper frame.

  With regard to a document intended to improve the strength of the side frame and the upper frame, JP-A No. 11-70828 “Vehicle seat provided with a device for protecting the neck portion at the time of impact from behind” can be cited. (5)). Further, “Side frame member for seat back of vehicle seat” disclosed in JP2010-158464A (referred to as Document (6)). In these inventions, an upper frame is extended to the side frame to be reinforced, or the side frame is constituted by a first vertical member with ribs and a second vertical member with ribs. However, the document (5) increases the material, increases the weight of the vehicle, increases CO2, and increases the cost. Further, since the document (6) uses two members, there is a problem in workability such as necessity of welding work and expansion of work time.

JP-A-2005-138754 JP-A-7-31526 JP 2002-315649 A JP 2002-315649 A JP-A-11-70828 JP 2010-158464 A

  In each of the above-listed documents, there is a feeling of insufficient strength, and there is a possibility that a problem may be left in response in an emergency. Moreover, since an incidental structure is required, there exists an improvement point which requires an effort and expense. Further, the side frame has problems in workability such as material problems, necessity of welding work, and expansion of work time. Thus, any invention is essentially impossible to achieve the intent of the present invention.

In view of the above, the present invention achieves the following objects.
“I” By shortening the welding length of the upper frame and bracket (welding length), the welding time can be shortened, the amount of welding rods used can be saved, or the CO2, cost, and time can be reduced. Plan.
“B” In addition, the upper frame mounting portion has a flat structure having upper and lower bent ends, or a structure having a flat shape formed by notches and crushes having plate-like upper and lower bent ends. Utilizing this, the strength of the upper frame and bracket is improved.
“C” Furthermore, the upper frame and / or the side frame are formed in a deformed shape, the contact area between the upper frame and the side frame is increased, and the number of welding points between the upper frame and the side frame is increased. Increase the strength of the frame.
"D" Strengthening the side and upper frame unit by using a caulking mechanism to firmly integrate the side and upper frame unit composed of the front and rear panels into the front and rear panels.
“E” By making the upper frame and side frame into a unit structure, the strength will be improved and torsion, breakage (breakage), or human injury (damage) will be prevented.
“He” By making the bracket end face and / or the headrest stay rectangular, it is possible to improve strength and prevent twisting, breaking, or human injury.

  The invention of claim 1 is intended to achieve the characteristics of “i”, “b”, “d”, “e”, and “he”.

Claim 1 is a headrest bracket support structure in which an upper frame unit of a vehicle is an upper frame unit configured by front and rear panels, and a headrest bracket is inserted into a rectangular through hole formed in the upper frame unit. There,
The headrest bracket support structure is configured such that the headrest bracket is inserted into the through hole, and a welded portion between a wall surface of the through hole and any side surface of the headrest bracket is welded.

  The invention of claim 2 intends to achieve the characteristics of “I”, “B”, and “C”.

Claim 2 is a support structure of the headrest bracket according to claim 1,
The upper frame unit is formed by combining at least a front panel and a rear panel, and a connecting portion between the two panels is formed by engaging a plurality of holes and a plurality of rib pieces or welding. The support structure of the headrest bracket is configured such that the plurality of holes and the plurality of rib pieces have a positioning structure and the other rib pieces and the other holes are fixed by caulking.

  The inventions of claims 3 and 4 are intended to achieve the characteristics of “I”, “B”, and further “D” and “E”.

Claim 3 is the support structure of the headrest bracket according to claim 1,
In the front panel and / or the rear panel, a contact portion provided along the wall surface of the through hole is formed, and a front side surface or a clinch side surface of the headrest bracket is welded to the contact portion. It is the support structure of the headrest bracket made into the structure to do.

Claim 4 is the support structure of the headrest bracket according to claim 1,
While welding the arm piece part provided in the said front panel and / or the said back panel, the welding protrusion provided in the left-right side surface of the said headrest bracket, and the left-right side surface, respectively, this front of this upper frame unit And a support structure of the headrest bracket configured to weld the arm piece provided on the rear panel, the welding protrusion provided on the clinch side of the headrest bracket, and the clinch side.

According to the first aspect of the present invention, there is provided a support structure for a headrest bracket in which the upper frame of the vehicle is an upper frame unit configured by front and rear panels, and the headrest bracket is inserted into a rectangular through hole formed in the upper frame unit. Because
A headrest bracket support structure in which a headrest bracket is inserted into a through hole and a welded portion between a wall surface of the through hole and any side surface of the headrest bracket is welded.

  Claim 1 can achieve the characteristics of “i”, “b”, “d”, “e”, and “he”.

Invention of Claim 2 is the support structure of the headrest bracket of Claim 1, Comprising:
The upper frame unit is configured by combining at least a front panel and a rear panel, and a connecting portion of the two panels is formed by engaging a plurality of holes and a plurality of rib pieces or welds. This is a headrest bracket support structure in which a single hole and a plurality of rib pieces are used as a positioning structure, and another rib piece and another hole are fixed by caulking.

  The invention of claim 2 can achieve the characteristics of “I”, “B”, and “C”.

Invention of Claim 3 is a support structure of the headrest bracket of Claim 1,
The front panel and / or the rear panel is formed with a contact portion provided along the wall surface of the through hole, and the headrest is configured to weld the front side surface or the clinch side surface of the headrest bracket to the contact portion. It is a support structure of a bracket.

Invention of Claim 4 is the support structure of the headrest bracket of Claim 1, Comprising:
While welding the arm pieces provided on the front panel and / or the rear panel, the welding protrusions provided on the left and right side surfaces of the headrest bracket, and the left and right side surfaces, respectively, the front of the upper frame unit and the rear panel It is the support structure of the headrest bracket made into the structure which welds the provided arm piece part, the protrusion for welding each provided in the clinch side surface of the headrest bracket, and the clinch side surface.

  Claims 3 and 4 can achieve the characteristics of “i”, “b”, and “d” and “e”.

Scale perspective view showing the entire structure of the sheet through Perspective view of a partial defect showing the relationship between the seat back and the headrest device Schematic diagram showing the relationship between the seat and anthropomorphic during normal times It is a schematic diagram showing the relationship between the seat and the anthropomorphic at the time of the front collision, the headrest is in the normal position, but the seat back is bent, and the neck of the anthropomorphic is on the running side (front side) Indicates that It is a schematic diagram showing the relationship between the seat and anthropomorphic at the time of rear collision, and shows the state where the headrest protects the neck of the anthropomorphic and eliminates whiplash A perspective view showing an example of a bracket and viewed from the side of the clinch A perspective view showing an example of the bracket as seen from the front side 4-1 front view Front view of Fig. 4-1-1 This is an example of a bracket and is a back view as seen from the connecting side (including the side without connection) Front view as seen from the front side of Fig. 4-1-3 A perspective view showing another example of the bracket as viewed from the clinch side The perspective view which showed another example of the bracket and was seen from the connection side The perspective view which showed another example of the bracket and was seen from the clinch side The perspective view which showed another example of the bracket and was seen from the connection side A perspective view showing another example of the bracket, as viewed from the clinch side The perspective view which showed another example of the bracket and was seen from the connection side FIG. 4A is a side view showing a state where a part of the bracket shown in FIG. Side view of the state which left the one part side surface which showed the other example of the bracket shown to FIGS. 4-2, and the relationship with an upper frame. Side view of the state which left the one part side surface which showed further another example of the bracket shown to FIGS. 4-3, and the relationship with an upper frame Side view of the state which left the one part side which showed another example of the bracket shown to FIGS. 4-1, and the relationship with an upper frame. A perspective view showing a mounting portion that has been crushed by a sharpening process and a mounting wall piece in a standard form that emphasizes strength, prior to mounting the bracket (headrest bracket) on the mounting portion of the upper frame A perspective view showing a mounting portion that has been crushed by a roughing process and an irregularly shaped mounting wall piece that emphasizes productivity and ease of welding, prior to mounting the bracket (headrest bracket) on the mounting portion of the upper frame The top view which showed typically the state which attached the bracket to the attaching part of the upper frame of FIGS. The top view which showed typically the state which attached the bracket to the attaching part of the upper frame of FIG. 6-2. FIG. 6B is a rear view of a partially cutout showing a state in which a bracket is attached to the attachment portion of the upper frame in FIG. 6A, where the pipe diameter D1 of the bent portion of the upper frame and the pipe diameter D0 of the drooping straight portion are approximately; Moreover, the pipe thickness t1 of the bending part and the pipe thickness t0 of the drooping straight portion are substantially equal. Moreover, it has shown that the bending R became large. FIG. 6B is a rear view of a partially cutaway portion of another example showing a state where a bracket is attached to the attachment portion of the upper frame in FIG. 6A, and shows a pipe diameter D1 of a bent portion of the upper frame and a pipe of a drooping straight portion thereof The diameter D0 is extremely equal (considered to be the same), and the pipe thickness t1 at the bent portion and the pipe thickness t0 at the drooping straight portion are extremely equal. In addition, the bending R is further increased. 6B is a rear view of the partially cutout showing a state where the bracket is attached to the attachment portion of the upper frame in FIG. 6-2 (similar to FIG. 8-1). FIG. 6B is a rear view of another example of a partially missing state in which the bracket is attached to the attachment portion of the upper frame (similar to FIG. 8-1-1). It is the schematic diagram (partial 1) which showed the efficient welding angle state of the attaching part of an upper frame, and a bracket, and in order to hold | maintain predetermined | prescribed intensity | strength with the smallest angle and being economical, This degree is necessary It is the schematic diagram (partial 2) which showed the other intermediate welding angle of the attachment part of an upper frame, and a bracket. It is a schematic diagram (full) showing other maximum welding angle states of the mounting part of the upper frame and the bracket. The largest angle enables welding of approximately ½ of the pipe diameter of the upper frame, and the rest of the mounting part The pipe diameter can be welded to about 1/2 of the pump diameter, and the strength of the upper frame can be improved. However, there is room for improvement in efficiency and economy. It is an example of the degree of the attachment part of the upper frame, (A) is an end view showing a state of being crushed at the center (offset L), and (B) is about 3 mm in front of the center (an example). An end view showing a state of being crushed by (2), (c) is an end view showing a state of being crushed by about 3 mm (an example) after the center, but is optional. It is an example which formed the attaching part in the upper frame via the structure of two notches, and the perspective view which showed the state before attaching a bracket to this attaching part Plan view schematically showing FIG. Front view of FIG. FIG. 11A is a front view of another example in which the bracket is attached to the attachment portion of the upper frame in FIG. 11A, and shows that the bending R is further increased with respect to FIG. 9-3. It is the other example which formed the attaching part in the upper frame via the structure of the double notch provided with the flat, and is a perspective view showing the state before attaching a bracket to this attaching part Plan view schematically showing FIG. 11-4 FIG. 11-4 is another example, and is a plan view schematically showing a state where the bending angle of the projecting piece is an obtuse angle with respect to the hole (the same applies to other examples). Front view of Fig. 11-4 11-4 is a front view of another example in which the bracket is attached to the attachment portion of the upper frame in FIG. 11-4, and shows that the bending R is further increased with respect to FIG. 11-6. A rear view with the aim of increasing the strength of the bracket by inserting a single pin into the upper frame and attaching this pin to the side of the bracket to achieve a synergistic effect with the welded part. Sectional drawing which showed an example of the tool which inserts the pin of FIG. 12-1, and a use condition A rear view with the aim of improving the strength of the bracket by inserting two pins into the upper frame and attaching this pin to the side of the bracket to synergize with the welded part. Sectional drawing which showed an example of the tool which inserts the pin of FIG. FIG. 13-1 is a plan view schematically showing an example of a tool for inserting a pin and a usage state. Both free ends of the pipe (material) constituting the upper frame are formed into a flat rectangular tube body and a skirt tube body in the axial direction, and side frames (or side frame units) are provided on the square tube body and the skirt tube body. Perspective view of main part (only a part is shown) of an example 14-1 is a rear perspective view of FIG. The details of the welding location are shown in the front view of FIG. 14-1 (a hole is provided in the side frame unit, and the upper frame and the side frame unit are fixed by welding to the hole) Schematic showing the characteristics when bending R is adopted as the maximum value and disclosing changes in the diameter and thickness of the pipes constituting the upper frame Schematic diagram showing that the bending R of the upper frame in FIG. Left side view of Fig. 14-2 14B is a right side view of FIG. The figure which showed another example of the welding location in FIG. 14-4 Plan view of FIG. 14-2 The figure which showed the section of Drawing 14-3 Both free ends of the pipes constituting the upper frame are made into a rectangular tube with a flat shape in the axial direction and a skirt tube, and the main part of an example in which a side frame is provided on the square tube and the skirt tube, with caulking, A perspective view of a part of which both are integrated. The free ends of the pipes constituting the upper frame are only flat rectangular tubes that are flat in the axial direction, and this is the main part of an example in which side frames are provided on the rectangular tubes. Perspective view with missing part The figure which made the principal part of Drawing 14-7 or Drawing 14-8 a section, and showed Schematic diagram explaining the impact in the front-rear direction on the side of the upper frame Schematic diagram explaining impact in the left-right direction and torsional direction on the front of the upper frame End face schematic diagram showing various combinations and forms of upper and side frames 16-1 is an end face schematic diagram of the main part of FIG. The top view which showed typically the other example which made the bracket, the headrest support, and the headrest stay into a rectangular shape (square shape in plan view) Side view of Figure 17-1 Front view of FIG. Scaled conceptual diagram of a part of the upper frame unit (or side frame unit) of a panel structure provided with a bracket, explaining an example of the positioning. Conceptual diagram showing the whole of FIG. The perspective view which decomposed | disassembled and showed the front panel (inner side panel) and the back panel (outer side panel) of the principal part of an upper frame and a bracket unit. The top view which showed an example which inserted the bracket in the through-hole of the upper frame unit Front view of FIG. Rear view of FIG. Sectional view expressing the through hole and bracket of FIG. Cross-sectional view of an example with the through hole and bracket as the main components Cross-sectional view of another example that expresses mainly through-hole and bracket Sectional view showing an example of welding a through hole and a bracket In the example of the welding location of FIG. 23-3, the principal part expanded sectional view which showed an example of the welding state In another example of the welding location of FIG. 23-3, the principal part expanded sectional view which showed an example of the welding state Sectional drawing which is another example which welds a through-hole and a bracket, and showed the welding location Sectional drawing showing the front panel or rear panel of the main part of the upper frame unit Enlarged sectional view for explaining an example of caulking shown in FIG. An enlarged schematic view of the main part showing the relationship between the bending angle of the lateral end of the conventional upper frame and the mounting part. The enlarged schematic diagram of the principal part which showed an example of the relationship between the bending angle of the horizontal direction edge part of this invention, and an attachment part The enlarged schematic diagram of the principal part which showed another example of the relationship between the bending angle of the horizontal direction edge part of the upper frame of this invention, and an attaching part The enlarged schematic diagram of the principal part which showed another example of the relationship between the bending angle of the horizontal direction edge part of the upper frame of this invention, and an attaching part. Schematic diagram showing the bending (bending) state of the upper frame caused by the rear-end collision in the conventional structure

  In the figure, reference numeral 1 denotes a seat, and the seat 1 includes a seat cushion 100 and a seat back 101. The seat cushion 100 incorporates a seat frame 2. The seat back 101 incorporates a seat back frame 3.

  The seat back frame 3 has an upper frame 5 at the top and free ends 5a and 5a of the upper frame 5 (in the case of a pair, hereinafter, one of the symbols is written and explained) Side frames 6 and 6 are provided. Further, a lower frame 7 and a reinforcing arm are provided at the lower part. On the inner side of both end portions 500d in the lateral direction 5c (the width direction of the vehicle) of the pipe constituting the upper frame 5, a flat surface (this flat surface is attached to the vehicle by the crushing process). The mounting portion 500 is formed in a slanted state in the apparatus state, or is formed in two places (formed by crushing). Then, mounting wall pieces 501 are formed in the vertical direction 5d (the height direction of the vehicle) on both sides of the mounting portion 500, respectively. The mounting wall piece 501 includes a standard-type mounting wall piece 501 with emphasis on strength shown in FIG. 6-1, and a modified mounting wall piece 501 with emphasis on productivity and ease of welding shown in FIG. Conceivable. Further, the crushing processing or crushing depth (offset L) of the mounting portion 500 has the structure shown in FIG. 10, and the tool 4 shown in FIG. Various structures of the mounting portion 500 are conceivable. For example, in the example illustrated in FIG. 10A, the attachment portion 500 has a structure that stops the offset L (crushing processing) at the center 5 b of the upper frame 5. In addition, in the example shown in FIG. 10B, the attachment portion 500 has a structure that stops the offset L at a position of about 3 mm (for example, but not limited) before the center 5b. In the structure, the elasticity of the upper frame 5 is used to improve the strength and ensure durability. Furthermore, in the example shown in FIG. 10C, the offset L is stopped at the rear side of the center 5b, for example, at a position of about 3 mm, in the structure exceeding the center 5b. There is an improvement in strength. However, in FIG. 10C, for example, it may be necessary to take into account the complexity of work related to the crushing process, skill required, or problems such as the occurrence of cracks. The flat surface (flat shape) based on this crushing process and / or the flat (flat) area size of the flat surface is improved in welding strength and accuracy, or contact of the bracket 8 described later ( Welding) This is useful when considering improvement of the area or securing of a welding gap. As described above, the depth of the offset L (depth stop position) can be arbitrarily selected from the example of the center 5b, the example of the front, or the example of the rear (depth).

  The mounting portion 500 is provided with a clinching side surface 8a (an example of a side surface) of the bracket 8 (headrest bracket). An example of the structure of the bracket 8 is shown in FIGS. 4-1 to 4-4-1 and FIGS. 5-1 to 5-4. On the upper and lower sides of the clinch side surface 8a of the bracket 8, there are provided projecting pieces 9-1 that are directed outward and smaller than the width dimension between the side surfaces 8b, and the front side surface 8c is provided on both side surfaces 8b. Protruding pieces 9-2 for welding directed to each are provided. The projecting piece 9-1 and the other projecting piece 9-2 have a structure in which the plate material of the cut clinching side surface 8a and both side surfaces 8b is cut out and pressed by press working. Accordingly, notched holes 9-1a and 9-2a are formed in the clinching side surface 8a and both side surfaces 8b. The projecting piece 9-1 of the clinching side surface 8a is an example although it is symmetrical in the vertical direction. Further, the receiving side of the protruding piece 9-2 (the direction in which the cutout hole 9-2a is provided) is provided substantially in the middle of the upper and lower protruding pieces 9-1 so that the forward direction 5f of the upper frame 5 (the vehicle forward direction) ). Various forms of the projecting piece 9-2 can be considered, but in principle, a shape similar to the front direction 5f of the upper frame 5 is ideal (corresponding to FIG. 5-1). However, when viewed from the side, the substantially chevron shape shown in FIG. 5-2 and the partial curve formed by adding a process such as pressing to the raised protrusion 9-2 shown in FIG. 5-3, for example. A plate shape or a divided shape having a curved surface shown in FIG. 5-4 can also be used. Moreover, in FIGS. 4-1-4, FIGS. 4-2-1, FIGS. 4-3-1, and FIGS. 4-4-1, the attachment side of the bracket 8 is made into the connection side surface 8a1 (an example of a side surface). . In this configuration, the following applies to the crink side surface 8a.

  An example of mounting the bracket 8 to the mounting portion 500 of the upper frame 5 will be described. On both sides of the mounting portion 500 in the longitudinal direction 5d, left and right mounting wall pieces 501 and 501 (referred to as 501) are crushed. Since it is formed, the clinch side surface 8a of the bracket 8 and both side surfaces 8b and 8b (referred to as 8b) are located between the mounting portion 500 and the mounting wall piece 501. In this state, the protruding piece 9-1 of the clinching side surface 8a is formed by the upper bent end portion 500a and / or the lower bent end portion 500b "upper bent end portion 500a" formed during the crushing process of the mounting portion 500. Or the lower bent end portion 500b or both the upper and lower bent end portions 500a and 500b "(the upper and lower end portions) are welded 11 as will be described later (in the lateral direction 5c of the upper frame 5, At the same time, the protruding pieces 9-2 on both side surfaces 8b are attached to the front direction 5f of the upper frame 5 (the free end 501a of the mounting wall piece 501) as described later. And this protrusion piece 9-2 welds the welding location 10 with the front direction 5f of the upper frame 5, and while this protrusion piece 9-1 and the upper bending edge part 500a or the lower bending edge part 500b. The welded part 10 is welded 11. The bracket 8 is fixed to the upper frame 5 by the welding 11. In addition, although not shown in figure, the protrusion piece 9-1 and / or the protrusion piece 9-2 use either one of them, and weld it as mentioned above, and also this one other (any other) ) May be the same as the conventional structure. That is, any other welding is performed, for example, the clinch side surface 8a is welded to the upper bent end portion 500a and / or the lower bent end portion 500b, or both side surfaces 8b are connected to the front of the upper frame 5. It is a method of welding in the direction 5f. By performing the attachment and welding 11 described in detail above, for example, the upper frame 5 and the bracket 8 can be connected and the strength can be improved. As described above, mounting and welding of the bracket 8 having the connecting side surface 8a1 shown in FIG. 4-1-4, FIG. 4-2-1, or FIG. 4-3-1 and FIG. 4-4-1. The method is the same.

  Moreover, the crushing position (A) of the attachment part 500 of the upper frame 5 shown in FIGS. 6-1, 6-2, FIGS. 7-1, 7-2, or FIG. 10 is arbitrary. However, a preferable example will be described. For example, as shown in FIG. 10, one direction (L1) from the center 5b of the upper frame 5 is desirable. And in the welding location 10 of the attachment wall piece 501 and the both side surfaces 8b of the bracket 8, and the welding 11, the length dimension (L3) to the center 5b is large, and the length of the welding 11 (welding location 10). A smaller dimension (L2) is desirable because strength can be improved. The projecting piece 9-1 is smaller than the width dimension between both side surfaces 8b of the bracket 8 (having a length 500c shorter than the length in the lateral direction 8d of the bracket mounting portion 500. Accordingly, the upper frame 5 is folded upward. In the present invention, for example, in contrast to the conventional method of welding the clinch side 8a of the bracket 8 by welding, the length of the weld 11 is also smaller than the bent end portion 500a and the lower bent end portion 500b. Shorten the time and save the welding rod usage, or reduce CO2, cost, and time. For example, it is effective in improving the strength of the bracket 8 and / or the upper frame 5. In this example, the projecting piece 9-1 is two-welded 11 in the longitudinal direction of the bracket 8 (the height direction of the vehicle). Further, an angle θ formed by crushing is generated in the front direction 5f of the upper frame 5, and usually the length and amount of welding increase. However, in the present invention, even if the angle θ is generated, the projecting piece 9-2 is attached to the left and right sides (both sides) of the upper frame 5 in the front direction 5f and to the left and right front sides of the mounting wall piece 501. The attachment of the projecting piece 9-2 is a part of the front direction 5f of the bracket 8 (that is, approximately 1/3 of the length of the bracket 8 in the vicinity of the length of the projecting piece 9-2). ) Is welded 11, and the length and amount of the weld 11 are reduced. Therefore, shortening of the welding time, saving of the amount of use of the welding rod, reduction of CO2, cost, time, etc. are aimed at. For example, it is effective in improving the strength of the bracket 8 and / or the upper frame 5.

  Moreover, when forming this attachment part 500, there exists an example shown to FIGS. 11-1 to 11-6-1. This structure is a structure in which two notches 502 (notches) are provided in the longitudinal direction 5d of the upper frame 5 to form the mounting portion 500. For example, a pair of V-shaped blades (not shown) ) To form two notches 502 having a substantially V-shaped notch surface on the upper frame 5, and then crushing between the two notches 502 with the tool 4, for example. As a result, a notch half-pipe pipe piece 503 is formed on both sides of the mounting portion 500, and a cavity 504 is formed in the upper frame 5 by the notch half-pipe pipe piece 503 and the notch 502. The protruding piece 9-1 is attached to the mounting portion 500 formed in this way, as in the above example. The method and features are the same. In this example, since the angle θ does not occur, the projecting piece 9-2 is attached to both sides of the front frame 5f of the upper frame 5. The protruding piece 9-2 and the bracket 8 are partly welded 11, and the length and amount of the weld 11 are reduced. Therefore, shortening of the welding time, saving of the amount of use of the welding rod, reduction of CO2, cost, time, etc. are aimed at. In this example, the bracket 8 and / or the upper frame 5 can be prevented from further bending, twisting, and the like, and the strength can be improved. In this example, the notched half-pipe pipe piece 503 forming the cavity 504 has elasticity, which is effective in preventing the bracket 8 from being bent, twisted, or collapsed. 11-5-1 is a plan view schematically showing a state in which the bending angle β of the projecting piece 9-2 is an obtuse angle with respect to the hole 9-2a, but this example is not illustrated. The other embodiments are also the same (see FIGS. 5-2 to 5-4, etc.).

  Furthermore, there is another example shown in FIGS. 12-1 to 13-3. In another example, the two notches 502 are processed with a pair of blades whose outer side is a straight blade surface and whose inner surface is a tapered blade surface (not shown). By processing this pair of blades, two notches 502 having an irregular V-shaped notch surface are formed in the upper frame 5. The two notches 502 are crushed with a tool (not shown) having a curved inner surface and a recess. As a result, on the both sides of the mounting portion 500 and the mounting portion 500 are formed the notched half-pipe pipe pieces 503 whose upper and lower end portions are curved and whose intermediate portion has a flat 503a (flat shape in the vertical direction 5d), A cavity 504 is formed in the upper frame 5 by the notched half-pipe pipe piece 503 and the notch 502. By welding the flat 503a 11, the welding accuracy can be improved, the length and / or area of the welded portion can be reduced, and the efficiency of the welding operation can be reduced and the cost can be reduced. It is valid. And although this welding 11 has each aspect, although not shown in figure, the point is aiming at the reduction | decrease of the length or location of the welding 11, or aiming at the efficiency improvement of the welding 11. Others conform to FIG. 11-1 to FIG. 11-6-1 described above.

  12-1 to 13-3, the upper frame 5 has a hole 505 (not shown, but there are examples, but the shape is not limited. In addition, a wire, a plate shape, etc. may be formed). The pin 13 inserted in the hole 505 (according to the shape of the hole 505) is brought into contact with the side surface 8b of the bracket 8 so that the bracket 8 is effectively prevented from bending, twisting or falling (improvement of strength). Further, the pin 13 and the side surface 8b can be welded 11, and the bracket 8 and / or the upper frame 5 can be prevented from being bent or twisted, and the strength can be improved. The number and position of the pins 13 are not limited and can be on one side of the side surface 8b. Moreover, there is no limitation on the shape of the pin 13 and its material. FIGS. 12-1 and 12-2 show the structure of one pin 13, and FIGS. 13-1 to 13-3 show the structure of two pins 13. Are substantially the same. The hole 505 may have a structure such as punching and ribs. Although not shown in the drawings, the mechanism of this pin 13 can be adopted in each of the embodiments. In addition, as a jig for opening the hole 505, for example, a jig (mold) such as a mold including an upper punch 15 (punch) provided in the upper mold and a lower punch 16 provided in the lower mold is used. There are an example in which one hole 505 is provided on both side surfaces 8b of the A type bracket 8, an example in which two holes 505 are provided on both side surfaces 8b of the B type bracket 8, or a combination type (not shown). Of course, there may be a structure in which the hole 505 and the pin 13 are not provided. The pin 13 is ideally a prism, but may be a polygonal shape, a round pipe, or the like. Further, by using the tool 14 around the hole 505, a burring 505a is formed to improve the strength such as bending and twisting. The tool 14 is pulled out after processing and the operation is finished.

  14-1 to 14-9 show that both the free ends 5a of the pipe of the upper frame 5 are connected to a rectangular tube 510 having a flat shape in the axial direction 5e, and a free end 510a of the rectangular tube 510 is connected to an inner 510b. The skirt cylinder 511 is formed by expanding in the direction. This skirt cylinder 511 is to increase the number of welded portions 11 with the side frame 6, and can be expected to improve the strength of the free end 5 a and the strength of the side frame 6. The square cylinder 510, the skirt cylinder 511, and the front panel 600 or the rear panel 601 of the side frame unit 6-6 are shown as an example of a configuration that is held by the welding 11 or the caulking 20 or the like. In this group, for example, in the embodiment shown in FIG. 14-2-1, the bending R is large and the diameters D0 and D1 of the pipes constituting the upper frame 5 are changed to the thickness (plate thickness) t0 and t1. FIG. 8 is a schematic diagram disclosing that this occurs, and conforms to the description of FIG. 8-1-1, FIG. 8-2-1, and the like described above. 14-2, the bending R of the upper frame 5 is adopted as the maximum value in this embodiment, and in an example of a structure in which this bending R is provided from the inside of the mounting portion 500, a pipe is used. It is considered that the changes in the diameters D0 and D1 and the wall thicknesses t0 and t1 are slight. And the feature is as follows. “I” The strength of the pipe (upper frame 5) is increased (in the logical formula, R “bending” = 6D “pipe diameter”). “B” The length of the upper frame 5 is shortened due to the large bending radius R, and concomitantly, for example, the material can be saved and the weight can be reduced. “C” Pipe diameter and / or wall thickness change is small, and pipe accuracy can be improved. “D” Increase in strength and / or accuracy to expand the selection range and room for materials, and in some cases, use of inexpensive or inferior quality materials, cost reduction, and room for selection and transportation There are advantages such as being able to achieve convenience. “E” There are advantages such as reducing the weight of the entire upper frame 5 (the entire seat 1), saving resources, miniaturization, etc., and contributing to the maintenance of the global environment. The structure with a large bending radius in FIG. 14-2-2 shows an example, and can be employed in other embodiments of the present invention. 14-4 and FIG. 14-4-1 show the respective embodiments when the upper frame 5 and the side frame unit 6 are welded 11, and this FIG. 14-4 is welded around the center. FIG. 14-4-1 shows an example in which welding 11 is performed on both side surfaces, but is an example. In addition, in FIGS. 14-7 to 14-9, each embodiment when the upper frame 5 and the side frame unit 6 are caulked 20 is shown. In this embodiment, FIG. 14-8 is an example in which both ends of the upper frame 5 are only the rectangular tube 510. Others are based on the above example.

  Since there are other embodiments for forming the square tube body 510 and the skirt tube body 511, the following description will be given. In each of the embodiments, the impact strength of the upper frame 5 in the front-rear direction B, the impact strength in the left-right direction C, or the impact strength against torsion D, cost, or workability shown in FIGS. The cross-sectional shape determined in consideration of the above, and the examples of (a) to (le) in FIG. 16-1, the examples of (a1) to (le1), and (f2) and (le2) Examples are given. In each example, the side frame 6 has seven types of shapes, and the upper frame 5 has 15 types of shapes. In each combination, the impact strength with respect to the front-rear direction B, the impact strength with respect to the left-right direction C, or the impact strength with respect to the torsion D, cost, workability, and the like are different. Ensure its optimal structure and shape. FIG. 16-2 shows the basic structure of the side frame 6, and there are five types shown in (1) to (5). In each of these structures and shapes, in the structure in which the end surface has a multi-sided shape, the upper frame 5 has a strength ranging from (c), (c) 1 to (nu), (nu 1). Generally, it is effective in the impact strength with respect to the front-rear direction B, the impact strength with respect to the left-right direction C, or the impact strength with respect to the torsion D. On the other hand, in the structure having a multi-sided shape, the side frame 6 reaches (Li), (Li 1) and (Nu), (Nu 1), or (C), (C 1), The strength increases, and is generally effective in the impact strength with respect to the front-rear direction B, the impact strength with respect to the left-right direction C, or the impact strength with respect to the twist D. Furthermore, as a form common to the upper frame 5 and the side frame 6, in a structure having a pipe shape or a curved surface shape in part, (a), (a) and (e), (e) to (to) ) And (g) increase in strength, and are generally effective in impact strength in the front-rear direction B, impact strength in the left-right direction C, or impact strength in the twist D. In the figure, the weld 11 is indicated by x. Although not shown in the figure, fixing by caulking 20 is also possible. In this figure, (Le 1) to (Le 3) are examples in which a single protrusion 510-1 is provided on one surface (inner side and / or outer side) in the longitudinal direction of the rectangular tube 510. The strength of the cylinder 510 is improved. This protrusion 510-1 may be several.

  17-1 to 17-3, the bracket 8 having a rectangular shape (square shape or a similar square shape) in plan view, a headrest support 23 constituting the headrest 22, and In the configuration example employing the headrest stay 21, the bracket 8 having a rectangular shape and a corner R surface is attached to the attachment portion 500 of the upper frame 5 in a plan view. The leg portion 2301 of the headrest support 23 having a rectangular shape in a plan view and having a corner R surface is inserted into the rectangular bracket 8. Further, the headrest stay 21 formed by a rectangular pipe in a cross-sectional view is inserted into the through hole 2302 in a rectangular view in plan view provided in the head 2300 and the leg 2301 of the headrest support 23, and This is a support structure for the bracket 8. This structure is compared with the conventional square-shaped bracket 8, a headrest support 23 having a substantially tubular (annular) head 2300 and a leg 2301 constituting the headrest 22, and a tubular (annular pipe) headrest stay 21. It is intended to reduce weight and improve strength. Further, the structure, characteristics, and the like of the weld 11 are in accordance with the above-described examples. In this embodiment, for example, the upper frame 5 and the bracket 8 and the headrest 22 can be prevented from bending, twisting, etc., and can be prevented from falling down and displacing, or the headrest 22 can play a normal role. Structure. Although the structure of integrating the upper frame 5 and the like with the bracket 8 by attaching the bracket 8 to the upper frame 5 and welding 11 is described in each embodiment, details are omitted.

  Further, as shown in FIGS. 18 to 24-2, the upper frame 5 can be constituted by an upper frame unit 5-5 including a front panel 506 (inner side panel) and a rear panel 507 (outer side panel). is there. In this embodiment, a structure in which the front panel 506 and the rear panel 507 are integrated with a plurality of crimps 20 is desirable. The caulking 20 uses a jig (mold) such as a die made of an upper punch 15a (caulking punch) provided on the upper die and a lower punch 16a (caulking punch) provided on the lower die. Further, examples of the caulking 20 include a caulking 20 (not shown) that is a locking structure with a fitting unevenness, etc., from a holding structure (not shown) using a simple mold. In addition, a through hole 509 for inserting the bracket 8 is opened in the front panel 506 and / or the rear panel 507. In FIG. 23-3, the rear panel 507 is provided with an inwardly bent attachment portion 507a and a hole 507b, and the clinching side surface 8a of the bracket 8 is welded 11 or formed on the upper and lower portions of the rear panel 507. There is a method of welding 11 the upper part and / or the lower part of the arm piece part 507aa. Further, there is a method of welding 11 an arm piece 506aa formed on the upper part and / or lower part of the front panel 506 and the front side surface 8c of the bracket 8. The place to be welded 11 can be freely selected. 23-4 is similar to FIG. 23-3, but the front panel 506 is further provided with an inwardly bent attachment portion 506a and a hole 506b, and the front side surface 8c of the bracket 8 is welded 11. There is a method of welding 11 the upper and / or lower portions of the arm piece portions 506aa formed on the upper and lower portions of the front panel 506. Others are the same as the above example. FIG. 23-3-1 and FIG. 23-3-2 show examples of the welding 11 in the hole 507b of the attachment portion 507a shown in FIG. 23-3 or FIG. 23-4. . In the example of the upper frame unit 5-5 and the side panel unit 6-6, the protrusions 9-1 on the clinch side surface 8a of the bracket 8 and the protrusions 9-2 on both side surfaces 8b thereof are assembled at the time of assembly. The structure is provided in the lateral direction (the same direction as the protruding piece 9-1), and is configured to be in contact with the upper surface of the upper frame unit 5-5 and the side panel unit 6-6. The upper surface is welded 11. Although not shown, a structure having the same structure as the above-described protruding piece 9-2 and having a notch in the insertion hole of the bracket 8 is also possible. In this example, the welding 11 is performed using a notch.

  The connecting portions of the front and rear panels 506 and 507 are fixed through a caulking 20 formed by a plurality of engagement relationships, that is, not shown, but formed by holes and rib pieces (according to the shape of the holes) (FIG. 18 and the like). For example, the gap between the hole and the rib piece is provided with a margin for the purpose in the caulking 20 as an example). The die of the upper punch 15a and the lower punch 16a provided on the lower die, which is an example of the caulking 20, is used. The number of the caulking 20 and the number of the caulking 20 are a plurality of several as shown in FIG. In addition, the engagement relationship between the hole and the rib piece is positioned 20a at several locations as shown in FIG. 186 and the like, for example, in order to secure the connecting portion of the front and rear panels 506 and 507. . Therefore, it is conceivable that the caulking 20 is not operated when the positioning 20a is performed. In this way, the connecting portions of the front and rear panels 506 and 507 can be reliably and easily positioned and fixed through the positioning 20a and the caulking 20 operation. Therefore, the front and rear panels 506 and 507 can be fixed and molded with one touch. The structures of the caulking 20 and the positioning 20a are examples.

  Although not shown, the rectangular bracket 8, the headrest support 23, and the headrest stay 21 are employed in the front and rear panels 506 and 507 constituting the upper frame unit 5-5 (upper frame 5). An example is shown, and a rectangular through hole 509 is formed in the front and rear panels 506 and 507 of the upper frame unit 5-5, and the front panel 506 and / or the rear panel 507 is bulged. There can also be a structure. In this embodiment, for example, the upper frame unit 5-5 and the bracket 8 and the headrest 22 are effective in preventing bending, twisting, and the like, and in addition, the headrest 22 plays a normal role. The structure to get.

  In FIG. 26 showing the conventional structure, in the schematic diagram showing the bending state X of the upper frame 5000 caused by the rear collision, as shown in the drawing, the upper frame 5000 is bent, so that the bracket 8000 and the headrest (not shown) are shown. ) Will retreat and become a cause of whiplash disease. The present invention is intended for this improvement, and will be described below in comparison.

  Then, in FIG. 25-1 showing the conventional structure, if the mounting portion 500000 to which the bracket 8000 is attached has a loose crushing structure, the length (dimension) to the end portion 5000d of the upper frame 5000 is reduced. As a result, the bending (bending margin) of the end portion 5000d of the upper frame 5000 is small, and the bending becomes a steep angle. Therefore, for example, the outside of this bend mainly becomes smaller (approximately 60 °) and the wall thickness becomes thinner. As a result, the strength of the upper frame 5000 is insufficient, and problems such as bending and twisting can be considered. In addition, there is a problem that the bracket 8000 and the headrest 22 are bent and twisted, and the bracket 8000 is collapsed and displaced, and the headrest 22 cannot play a normal role.

  Further, in FIGS. 25-2 to 25-4, as shown in the above-described embodiments of FIGS. 8-1 to 8-2-1, the end of the upper frame 5 is strongly crushed. The portion 500d can be greatly bent. The reason is that the length 500c is shortened, and as a result, the dimension from the mounting portion 500 to the end portion 500d (curved end portion) is increased. Thus, there is a feature that the outside of the bend R becomes large and the thickness does not become thin (thickness “plate thickness” can be ensured). An example of the theoretical configuration is shown in FIG. 8-1, FIG. 8-1-1, etc., and the outer diameter D1 of the pipe at the end portion 500d is substantially the same as the outer diameter D0 of the original pipe. Further, the pipe thickness t1 of the end portion 500d and the original pipe thickness t0 are intended to be substantially the same (actual). For example, as in the present invention, by setting the bending R to approximately 80 °, it can be expected to have substantially the same effect as the perfect circle (perfect circle) of the upper frame 5. For example, conventional bending, twisting, or falling prevention ( It is effective in improving strength, and can eliminate whiplash and avoid injury. And in FIGS. 25-3 and 25-4, there exists a still more excellent effect by making bending R into about 100 degrees-about 130 degrees from said FIG. 8-1, etc. Effective from FIG. 8-1, etc.

  In addition, the structure which provides the notch 502 of the upper frame 5 shown in the said FIG. 11-1-FIG. 11-6-1, and the attaching part 500 provided with the welding location etc. of the notch half-pipe pipe piece 503, the flat 503a, This embodiment is considered to be more effective than the embodiments shown in FIGS. 6-1 to 8-2-1. For example, in this embodiment, the bending is further increased and the strength thereof can be improved. Further, the embodiment of the pin 13 in FIGS. 12-1 to 13-3, or the upper frame unit 5-5 in FIGS. 18 to 24-2, and / or in FIGS. 14-1 to 14-9. The same effect can be expected in the embodiment of the side frame unit 6-6.

DESCRIPTION OF SYMBOLS 1 Seat 100 Seat cushion 101 Seat back 2 Seat frame 3 Seat back frame 4 Tool 5 Upper frame 5-5 Upper frame unit 5a Free end 5b Center 5c Lateral direction 5d Vertical direction 5e Axial direction 5f Forward direction 500 Mounting part 500a Bend upward End portion 500b Lower bent end portion 500c Length 500d End portion 501 Mounting wall piece 501a Free end 502 Notch 503 Notched half-pipe pipe piece 503a Flat 504 Cavity 505 Hole 505a Burring 506 Front panel 506a Additional part 506aa Arm piece part 506b Rear panel 507a Attached portion 507aa Arm piece portion 507b Hole 509 Through hole 510 Square tube body 510-1 Projection 510a Free end 510b Inside 511 Skirt tube body 6 Side frame 6-6 Side Frame unit 600 Front panel 601 Rear panel 7 Lower frame 8 Bracket 8a Clinch side surface 8a1 Connecting side surface 8b Side surface 8c Front side surface 8d Lateral direction 9-1 Protruding piece 9-1a hole 9-2 Protruding piece 9-2a hole 10 Welding point 11 Welding 13 pin 14 tool 15 upper punch 15a upper punch (caulking punch)
16 Lower punch 16a Lower punch (crimping punch)
20 Caulking 20a Positioning 21 Headrest stay 22 Headrest 23 Headrest support 2300 Head 2301 Leg 2302 Through hole A Crushing position B Front-back direction C Left-right direction D Twist L Offset X Flexure state β Bending angle

Claims (4)

The vehicle upper frame is an upper frame unit configured with front and rear panels, and a headrest bracket support structure configured to insert a headrest bracket into a rectangular through hole formed in the upper frame unit,
A support structure for a headrest bracket, wherein the headrest bracket is inserted into the through hole, and a welded portion between a wall surface of the through hole and any side surface of the headrest bracket is welded. The headrest bracket support structure according to claim 1,
The upper frame unit is formed by combining at least a front panel and a rear panel, and a connecting portion between the two panels is formed by engaging a plurality of holes and a plurality of rib pieces or welding. A support structure for a headrest bracket in which the plurality of holes and the plurality of rib pieces have a positioning structure and the other rib pieces and the other holes are fixed by caulking. The headrest bracket support structure according to claim 1,
In the front panel and / or the rear panel, a contact portion provided along the wall surface of the through hole is formed, and a front side surface or a clinch side surface of the headrest bracket is welded to the contact portion. Support structure for the headrest bracket. The headrest bracket support structure according to claim 1,
While welding the arm piece part provided in the said front panel and / or the said back panel, the welding protrusion provided in the left-right side surface of the said headrest bracket, and the left-right side surface, respectively, this front of this upper frame unit And a support structure of the headrest bracket configured to weld the arm piece provided on the rear panel, the welding protrusion provided on the clinch side of the headrest bracket, and the clinch side.