CN102039337A - Slot part forming method for pipe - Google Patents
Slot part forming method for pipe Download PDFInfo
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- CN102039337A CN102039337A CN2010105174406A CN201010517440A CN102039337A CN 102039337 A CN102039337 A CN 102039337A CN 2010105174406 A CN2010105174406 A CN 2010105174406A CN 201010517440 A CN201010517440 A CN 201010517440A CN 102039337 A CN102039337 A CN 102039337A
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Abstract
The present invention provides a slot part forming method for pipe, thereby forming the slot part with a mode that a R shape at the upper end of the inner wall is smaller and an actual slot depth can be increased. The forming method is used for forming slots (61,62) on an outer peripheral surface of the pipe (60) for headrest. A first pressing edge is a rectangular edge (52) in which a left side surface and a right side surface (52a,52b) are vertical with an axial direction and a width in a left-and-right direction is larger than the width between a left inner wall and a right inner wall (72a,72b) of a dent part (72). Furthermore a second pressing edge is an inclined edge (51) which has a right side surface (51b) that is vertical with the axial direction. Furthermore, the depths of the dent part (72) and a large width dent part (71) are formed so an inner circumferential surface of the pipe (60) for headrest does not contact with the bottom surfaces (72c,71c) of the dent part (72) and the large width dent part (71). When the left side surface and the right surface (52a,52b) of the rectangular edge (52) are respectively provided at the left side and the right side of the left inner wall and the right inner wall (72a,72b), and the right side surface (51b) of the inclined edge (51) is provided behind the right outer part of the right inner wall (71b) of the large width dent part (71), the punching cutting is performed.
Description
Technical field
The present invention relates to the groove manufacturing process of tubing.In more detail, for example relate to being installed on be shaped on the tubing tipper or be used to of location of the above-below direction that is used to carry out this head rest of head rest on the backrest of motor vehicle and prevent the method for the rectangular channel that comes off.
Background technology
In the past, for example in the foot of the head rest on being installed on the backrest of motor vehicle, be formed with the tipper of location of the above-below direction that is used to carry out head rest or the slot part of the rectangular channel that is used to prevent that head rest from coming off.Described slot part is in order to realize purposes such as anticreep and be configured as more than the prescribed depth.
On the other hand, the applicant has carried out the patent application (with reference to patent documentation 1, patent documentation 2) about the slot part manufacturing process of this kind tubing.
Patent documentation 1: No. 3509722 communique of Japan Patent
Patent documentation 2: No. 3706865 communique of Japan Patent
As Figure 12 and shown in Figure 13, in patent documentation 1, record the slot part manufacturing process of following tubing: the recess 42 and the wide cut recess 41 of cross section rectangular shape are inserted in the blank part of tubing 10 in the bar-shaped female mold 40 that the periphery upper surface forms, make and have and recess 42 corresponding rectangle swords 52 and mobile downwards with the positive mold 50 of wide cut recess 41 corresponding inclination swords 51, the outer peripheral face of tubing 10 is pressed into to recess 42 and wide cut recess 41, thereby on the outer peripheral face of tubing 10, forms the slot part of rectangular channel 12 or tipper 11.And, as shown in figure 14, by making this tubing 10 bendings, and make head rest.
In addition, in patent documentation 2, record following method: this rectangle sword 52 and inclination sword 51 are replaced as around rotating shaft rotation freely cylinder sword and the circular cone sword parallel with the axle of tubing 10, by this cylinder sword and circular cone sword stamping-out tubing 10.
In addition, in recent years, consider environment aspect etc. and need to improve the fuel availability of motor vehicle that the lightweight that therefore constitutes each parts of motor vehicle constantly develops.No exception about head rest, use the tubing 10 of thin-walled for light weight.
Yet the wall thickness that can be formed in the degree of depth of the slot part 11,12 on the outer peripheral face of tubing 10 and tubing 10 usually is proportional.That is, form darker slot part at 11,12 o'clock, tubing 10 needs heavy wall.Thus, slot part 11,12 is formed darker and make the viewpoint that head rest do not come off from seat and use the tubing 10 of thin-walled and make these both sides of viewpoint of head rest light weight be difficult to set up simultaneously than the degree of depth of regulation.
In addition, the position that is punched that in the past was accompanied by tubing 10 is pressed into the recess 42 or wide cut recess 41 inside of female mold 40, though not by direct stamping-out, but near the position that is punched of tubing 10 also deforms to enter recess 42 or wide cut recess 41, and therefore inwall 11b, the 12a of the slot part 11,12 that forms, 12b upper end become R shape (curved surface shape).Consequently, having the degree of depth of actual slot part 11,12 only is this R shape, more shallow problem.Therefore, must make slot part 11,12 be this R shape in advance extraly, but as mentioned above, in the tubing 10 of thin-walled, be difficult to than Deep forming slot part 11,12 than Deep forming.
Summary of the invention
Therefore, the objective of the invention is to, provide compared with prior art a kind of, can be so that the less mode of R shape of inwall upper end be shaped slot part, can increase the slot part manufacturing process of the tubing of the actual slot part degree of depth.
To achieve these goals, a first aspect of the present invention relates to slot part (62) manufacturing process of a kind of tubing (60), the cavity of the tubing (60) that extends about the axle edge is inner, with about inwall (72a, 72b) insert in the bar-shaped female mold (70) that the periphery upper surface forms with described recess (72) axially vertical and the cross section rectangular shape, make to have and move downwards with the corresponding positive mold (50) that is pressed into sword of described recess (72) and the outer peripheral face of described tubing (60) is pressed into to described recess (72), thereby on the outer peripheral face of described tubing (60), form slot part (62), slot part (62) manufacturing process of described tubing (60) is characterised in that, the sword that is pressed into of described positive mold (50) is its left and right side (52a, 52b) with the left and right sides inwall (72a of described axially vertical and left and right sides width than described recess (72), the rectangle sword (52) that width 72b) is wide, and the inner peripheral surface that the degree of depth of described recess (72) forms bulged-in described tubing (60) when the outer peripheral face with described tubing (60) is pressed into described recess (72) does not contact with the bottom surface (72c) of described recess (72), as the left and right side (52a that makes described rectangle sword (52), 52b) lay respectively at the left and right sides inwall (72a of described recess (72), after left and right sides foreign side 72b), form described slot part (62) by the described tubing of described rectangle sword (52) stamping-out (60).
In addition, second aspect relates to slot part (61) manufacturing process of a kind of tubing (60), the cavity of the tubing (60) that extends about the axle edge is inner, with about inwall (71a, 71b) insert in the bar-shaped female mold (70) that the periphery upper surface forms with described recess (71) axially vertical and the cross section rectangular shape, outer peripheral face with the described tubing (60) that moves downwards with the corresponding positive mold (50) that is pressed into sword of described recess (71) will be pressed into to described recess (71), thereby on the outer peripheral face of described tubing (60), form slot part (61), slot part (61) manufacturing process of described tubing (60) is characterised in that, described positive mold (50) be pressed into sword for its right flank (51b) with described axially vertical and have the inclined plane and an inclination sword (51) of decline from left surface (51a) towards right flank (51b) bottom from the down position on this inclined plane along the horizontal plane of described axially parallel extension, and the inner peripheral surface that the degree of depth of described recess (71) forms bulged-in described tubing (60) when the outer peripheral face with described tubing (60) is pressed into described recess (71) does not contact with the bottom surface (71c) of described recess (71), be positioned at the right foreign side of right inwall (71b) of described recess (71) when the right flank (51b) that makes described inclination sword (51) after, form described slot part (61) by the described tubing of described inclination sword (51) stamping-out (60).
In addition, the third aspect relates to slot part (62) manufacturing process of a kind of tubing (60), the cavity of the tubing (60) that extends about the axle edge is inner, with about inwall (72a, 72b) insert in the bar-shaped female mold (70) that the periphery upper surface forms with described recess (72) axially vertical and the cross section rectangular shape, make to have and move downwards with the corresponding positive mold (50) that is pressed into sword of described recess (72) and the outer peripheral face of described tubing (60) is pressed into to described recess (72), thereby on the outer peripheral face of described tubing (60), form slot part (62), slot part (62) manufacturing process of described tubing (60) is characterised in that, the sword that is pressed into of described positive mold (50) is the rotating shaft rotation short cylindrical shape freely that is mounted to around parallel with described axle, and in its cross sectional shape, its left and right side (82a, 82b) with the left and right sides inwall (72a of described axially vertical and left and right sides width than described recess (72), the cylinder sword (82) that width 72b) is wide, and the inner peripheral surface that the degree of depth of described recess (72) forms bulged-in described tubing (60) when the outer peripheral face with described tubing (60) is pressed into described recess (72) does not contact with the bottom surface (72c) of described recess (72), as the left and right side (82a that makes described cylinder sword (82), 82b) lay respectively at the left and right sides inwall (72a of described recess (72), after left and right sides foreign side 72b), form described slot part (62) by the described tubing of described cylinder sword (82) stamping-out (60).
In addition, fourth aspect relates to slot part (61) manufacturing process of a kind of tubing (60), the cavity of the tubing (60) that extends about the axle edge is inner, with about inwall (71a, 71b) insert in the bar-shaped female mold (70) that the periphery upper surface forms with described recess (71) axially vertical and the cross section rectangular shape, outer peripheral face with the described tubing (60) that moves downwards with the corresponding positive mold (50) that is pressed into sword of described recess (71) will be pressed into to described recess (71), thereby on the outer peripheral face of described tubing (60), form slot part (61), slot part (61) manufacturing process of described tubing (60) is characterised in that, the sword that is pressed into of described positive mold (50) is the rotating shaft rotation cone shape freely that is mounted to around parallel with described axle, and in its cross sectional shape, its right flank (81b) is with described axially vertical and have the inclined plane that descends from left surface (81a) towards right flank (81b) bottom and a circular cone sword (81) from the down position on this inclined plane along the horizontal plane of described axially parallel extension, and the inner peripheral surface that the degree of depth of described recess (71) forms bulged-in described tubing (60) when the outer peripheral face with described tubing (60) is pressed into described recess (71) does not contact with the bottom surface (71c) of described recess (71), be positioned at the right foreign side of right inwall (71b) of described recess (71) when the right flank (81b) that makes described circular cone sword (81) after, form described slot part (61) by the described tubing of described circular cone sword (81) stamping-out (60).
In addition, the 5th aspect relates to the slot part (61 of a kind of tubing (60), 62) manufacturing process, the head rest that extends about the axle edge is inner with the cavity of tubing (60), with about inwall (72a, 72b) with the recess (72) of described axially vertical and cross section rectangular shape and than the wide cut recess (71) of this recess (72) wide cut in bar-shaped female mold (70) insertion of leaving under the described axial state in the formation of periphery upper surface, make to have and be pressed into the positive mold (50) that sword and second is pressed into sword with described recess (72) and described wide cut recess (71) corresponding first and move downwards and the outer peripheral face of described head rest with tubing (60) is pressed into to described recess (72), thereby on the outer peripheral face of described head rest, form slot part (61 with tubing (60), 62), the slot part (61 of described tubing (60), 62) manufacturing process is characterised in that, it is its left and right side (52a that first of described positive mold (50) is pressed into sword, 52b) with the left and right sides inwall (72a of described axially vertical and left and right sides width than described recess (72), the rectangle sword (52) that width 72b) is wide, and second of described positive mold (50) be pressed into sword for its right flank (51b) with described axially vertical and have the inclined plane and an inclination sword (51) of decline from left surface (51a) towards right flank (51b) bottom from the down position on this inclined plane along the horizontal plane of described axially parallel extension, in addition, the degree of depth of described recess (72) and described wide cut recess (71) form when described head rest is pressed into described recess (72) and described wide cut recess (71) with the outer peripheral face of tubing (60) bulged-in described head rest with the inner peripheral surface of tubing (60) not with the bottom surface (72c of described recess (72) and described wide cut recess (71), 71c) contact, as the left and right side (52a that makes described rectangle sword (52), 52b) lay respectively at the left and right sides inwall (72a of described recess (72), left and right sides foreign side 72b), and after the right flank (51b) that makes described inclination sword (51) is positioned at the right foreign side of right inwall (71b) of described wide cut recess (71), form described slot part (61 with tubing (60) by described rectangle sword (52) and the described head rest of inclination sword (51) stamping-out, 62).
In addition, the 6th aspect relates to the slot part (61 of a kind of tubing (60), 62) manufacturing process, the head rest that extends about the axle edge is inner with the cavity of tubing (60), with about inwall (72a, 72b) with the recess (72) of described axially vertical and cross section rectangular shape and than the wide cut recess (71) of this recess (72) wide cut in bar-shaped female mold (70) insertion of leaving under the described axial state in the formation of periphery upper surface, make to have and be pressed into the positive mold (50) that sword and second is pressed into sword with described recess (72) and described wide cut recess (71) corresponding first and move downwards and the outer peripheral face of described head rest with tubing (60) is pressed into to described recess (72), thereby on the outer peripheral face of described head rest, form slot part (61 with tubing (60), 62), the slot part (61 of described tubing (60), 62) manufacturing process is characterised in that, it is the rotating shaft rotation short cylindrical shape freely that is mounted to around parallel with described axle that first of described positive mold (50) is pressed into sword, and in its cross sectional shape, its left and right side (82a, 82b) with the left and right sides inwall (72a of described axially vertical and left and right sides width than described recess (72), the cylinder sword (82) that width 72b) is wide, and it is the rotating shaft rotation cone shape freely that is mounted to around parallel with described axle that second of described positive mold (50) is pressed into sword, and in its cross sectional shape, its right flank (81b) is with described axially vertical and have the inclined plane that descends from left surface (81a) towards right flank (81b) bottom and a circular cone sword (81) from the down position on this inclined plane along the horizontal plane of described axially parallel extension, in addition, the degree of depth of described recess (72) and described wide cut recess (71) form when described head rest is pressed into described recess (72) and described wide cut recess (71) with the outer peripheral face of tubing (60) bulged-in described head rest with the inner peripheral surface of tubing (60) not with the bottom surface (72c of described recess (72) and described wide cut recess (71), 71c) contact, as the left and right side (82a that makes described cylinder sword (82), 82b) lay respectively at the left and right sides inwall (71a of described wide cut recess (71), left and right sides foreign side 71b), and after the right flank (81b) that makes described circular cone sword (81) is positioned at the right foreign side of right inwall (71b) of described wide cut recess (71), form described slot part (61 with tubing (60) by described cylinder sword (82) and the described head rest of circular cone sword (81) stamping-out, 62).
In addition, the 7th aspect relates to slot part (61, the 62) manufacturing process of a kind of tubing (60), it is characterized in that, chamfering is carried out in the upper end of at least one in the left and right sides inwall (71a, 71b) of the left and right sides inwall (72a, 72b) of described recess (72), described wide cut recess (71).
In addition, eight aspect relates to slot part (61, the 62) manufacturing process of a kind of tubing (60), it is characterized in that, chamfering is carried out in the lower end of at least one in the right flank (81b) of the left and right side (82a, 82b) of the right flank (51b) of the left and right side (52a, 52b) of described rectangle sword (52), described inclination sword (51), described cylinder sword (82), described circular cone sword (81).
At this, the corresponding key element or the corresponding item of the mode that symbolic representation accompanying drawing in the above-mentioned bracket and aftermentioned are used for carrying out an invention.
The invention effect
The slot part manufacturing process of Ji Zai tubing according to a first aspect of the invention, because the sword that is pressed into of positive mold is its left and right side and axial vertical and rectangle sword that left and right sides width is wideer than the width between the left and right sides inwall of recess, lay respectively at the left and right sides foreign side of left and right sides inwall of recess when the left and right side that makes the rectangle sword after, form slot part by rectangle sword stamping-out tubing, therefore, the upper surface of the left and right sides inwall of recess not only is pressed in the recess with the position by the tubing of rectangle sword stamping-out that axially overlaps, and also will produce distortion with respect to left and right sides foreign side.Thus, the power that acts on the foreign side to the left and right on the coincidence position acts as and makes not by the power that near position is out of shape in the mode that is drawn into recess that is punched of the tubing of direct stamping-out, so the inwall upper end, the left and right sides of slot part is difficult to form the R shape of being out of shape than difficulty.And even hypothesis forms the R shape, also the R shape than prior art is little.Therefore even be the tubing of thin-walled, the also actual grade of shaping slot part more deeply.
In addition, because concave depth forms the inner peripheral surface of bulged-in tubing when the outer peripheral face with tubing is pressed into recess and does not contact with the bottom surface of recess, therefore, do not have the contact resistance between the bottom surface of the inner peripheral surface of tubing and recess, thereby behind stamping-out, can extract female mold from tubing with less power.
In addition, slot part manufacturing process according to the tubing of second aspect record, since positive mold be pressed into sword for its right flank with axially vertical and have the inclined plane of decline and the inclination sword of the horizontal plane that extends in parallel vertically from the down position on this inclined plane from left surface towards the right flank bottom, be positioned at the right foreign side of right inwall of recess when the right flank that makes the inclination sword after, form slot part by inclination sword stamping-out tubing, therefore the upper surface of the right inwall of recess not only is pressed in the recess with the position by the tubing of rectangle sword stamping-out that axially overlaps, and also will produce distortion with respect to right foreign side.Thus, the power that acts on the foreign side to the right on the coincidence position acts as and makes not by the power that near position is out of shape in the mode that is drawn into recess that is punched of the tubing of direct stamping-out, and therefore, the inwall upper end, right side of slot part is difficult to form the R shape of being out of shape than difficulty.And even hypothesis forms the R shape, also the R shape than prior art is little.Therefore even be the tubing of thin-walled, the also actual grade of shaping slot part more deeply.
And, because concave depth forms the inner peripheral surface of bulged-in tubing when the outer peripheral face with tubing is pressed into recess and does not contact with the bottom surface of recess, therefore, do not have the contact resistance between the bottom surface of the inner peripheral surface of tubing and recess, thereby behind stamping-out, can extract female mold from tubing with less power.
In addition, by the groove manufacturing process combination (the 5th aspect) with groove manufacturing process with the tubing of second aspect record of the tubing of first aspect record, it is different and have a slot part of the action effect of the invention that first aspect and second aspect put down in writing to form a plurality of axial widths on tubing at head rest.
In addition, slot part manufacturing process according to the tubing of third aspect record, because the sword that is pressed into of positive mold is the rotating shaft rotation short cylindrical shape freely that is mounted to around parallel with axle, and in its cross sectional shape, its left and right side and axial vertical and cylinder sword that left and right sides width is wideer than the width between the left and right sides inwall of recess, lay respectively at the left and right sides foreign side of left and right sides inwall of recess when the left and right side that makes the cylinder sword after, form slot part by cylinder sword stamping-out tubing, therefore the upper surface of the left and right sides inwall of recess not only is pressed in the recess with the position by the tubing of cylinder sword stamping-out that axially overlaps, and also will produce distortion with respect to left and right sides foreign side.Thus, the power that acts on the foreign side to the left and right on upper surface and the position that is overlapped by the tubing of cylinder sword stamping-out of left and right sides inwall of recess acts as the power of being out of shape in the mode that is drawn into recess by near the position being punched of the tubing of direct stamping-out that makes not, even therefore positive mold is pressed into sword for rotating cylinder sword freely, the R shape that the inwall upper end, the left and right sides of slot part also is difficult to form difficult distortion.
In addition, slot part manufacturing process according to the tubing of fourth aspect record, because the sword that is pressed into of positive mold is the rotating shaft rotation cone shape freely that is mounted to around parallel with axle, and in its cross sectional shape, its right flank is with axially vertical and have the inclined plane of the decline from left surface towards the right flank bottom and the circular cone sword of the horizontal plane that extends in parallel vertically from the down position on this inclined plane, be positioned at the right foreign side of right inwall of recess when the right flank that makes the circular cone sword after, form slot part by circular cone sword stamping-out tubing, therefore the upper surface of the right inwall of recess not only is pressed in the recess with the position by the tubing of circular cone sword stamping-out that axially overlaps, and also will produce distortion with respect to right foreign side.Thus, the power that acts on the foreign side to the right on the position of coincidence acts as the power of being out of shape in the mode that is drawn into recess by near the position being punched of the tubing of direct stamping-out that makes not, even therefore the sword that is pressed into of positive mold is rotation circular cone sword freely, the inwall upper end, the left and right sides of slot part also is difficult to form the R shape of difficult distortion.
In addition, by the groove manufacturing process combination (the 6th aspect) with groove manufacturing process with the tubing of fourth aspect record of the tubing of third aspect record, it is different and have a slot part of the action effect of the invention that the third aspect and fourth aspect put down in writing to form a plurality of axial widths on tubing at head rest.
In addition, according to the slot part manufacturing process of the tubing of the 7th aspect record, because chamfering is carried out in the upper end of at least one in the left and right sides inwall of the left and right sides inwall of recess, wide cut recess, so the contact resistance of female mold and tubing reduces.Thus, behind stamping-out, can extract female mold from tubing with less power.
In addition, slot part manufacturing process according to the tubing of eight aspect record, because chamfering is carried out in the lower end of at least one in the right flank of the left and right side of the right flank of the left and right side of rectangle sword, inclination sword, cylinder sword, circular cone sword, therefore can prevent the breaking and crackle of slot part bottom of tubing.
In addition, as described in the slot part manufacturing process of tubing of the present invention, the left and right side that is pressed into sword of positive mold is with axially vertical and left and right sides width is wideer than the width between the left and right sides inwall of recess, after making the left and right side that is pressed into sword lay respectively at the left and right sides foreign side of left and right sides inwall of recess, by being pressed into the aspect that sword stamping-out tubing forms slot part, or the right flank that is pressed into sword of positive mold is with described axially vertical and have the inclined plane that descends from left surface towards the right flank bottom and a horizontal plane from the down position on this inclined plane along described axially parallel extension, after making the right flank that is pressed into sword be positioned at the right foreign side of right inwall of recess, form the aspect of slot part by inclination sword stamping-out tubing, not record fully in above-mentioned patent documentation 1 and patent documentation 2.
Description of drawings
Fig. 1 is illustrated in the groove manufacturing process of tubing of first embodiment of the present invention, by the side sectional view of the state before the positive mold stamping-out.
Fig. 2 is illustrated in the groove manufacturing process of tubing of first embodiment of the present invention, by the side sectional view of the state behind the positive mold stamping-out.
Fig. 3 is the major part amplification view of state shown in Figure 2.
Fig. 4 is the front view of state shown in Figure 2.
Fig. 5 is the schematic diagram that the distortion at each position of tubing is shown, and the state of Fig. 2 (a) is shown, and the state of Figure 13 (b) is shown.
Fig. 6 is illustrated in the groove manufacturing process of tubing of another embodiment of the present invention, by the side sectional view of the state behind the positive mold stamping-out.
Fig. 7 is the front view of groove manufacturing process that the tubing of second embodiment of the present invention is shown.
Fig. 8 is illustrated in the groove manufacturing process of tubing of Fig. 7, by the section plan of the state before the positive mold stamping-out.
Fig. 9 is the front view of groove manufacturing process that the tubing of another embodiment of the invention is shown.
Figure 10 illustrates the tabular sword that uses in the groove manufacturing process of tubing shown in Figure 9, (a) is front view, (b) is side view.
Figure 11 illustrates another embodiment of tabular sword, (a) is the front view of tabular sword with inclined plane of linearity, (b) is the front view with the tabular sword on curvilinear inclined plane.
Figure 12 is illustrated in the groove manufacturing process of the tubing that has example now, by the side sectional view of the state before the positive mold stamping-out.
Figure 13 is illustrated in the groove manufacturing process of the tubing that has example now, by the side sectional view of the state behind the positive mold stamping-out.
Figure 14 is the stereogram that the head rest of motor vehicle is shown.
Symbol description:
10 head rests tubing (tubing)
11 tippers (slot part)
The right inwall of 11b
12 rectangular channels (slot part)
12a left side inwall
The right inwall of 12b
20 molds
21 die holes
30 bed dies
40 female mold
41 wide cut recesses
42 recesses
50 positive mold
51 inclination swords (second is pressed into sword)
The 51a left surface
The 51b right flank
52 rectangle swords (first is pressed into sword)
The 52a left surface
The 52b right flank
60 head rests tubing (tubing)
61 tippers (slot part)
The right inwall of 61b
62 rectangular channels (slot part)
62a left side inwall
The right inwall of 62b
70 female mold
71 wide cut recesses (recess)
71a left side inwall
The right inwall of 71b
The 71c bottom surface
72 recesses
72a left side inwall
The right inwall of 72b
The 72c bottom surface
76 notch
80 positive mold
81 circular cone swords (second is pressed into sword)
The 81a left surface
The 81b right flank
82 cylinder swords (first is pressed into sword)
The 82a left surface
The 82b right flank
83 tabular swords
84 tabular swords
The 84a inclined plane
90 helical springs
91 helical springs
The specific embodiment
(first embodiment)
Referring to figs. 1 through Fig. 5, the slot part manufacturing process of the tubing 60 of first embodiment of the present invention is described.
In the slot part manufacturing process of this tubing 60, use the mould of tubing 60 and stamping-out tubing 60.And, mould possess mold 20, bed die 30, female mold 70 and with female mold 70 corresponding positive mold 50, be feature with the position relation of female mold 70 and positive mold 50 etc.
The degree of depth of the degree of depth of recess 72 and wide cut recess 71 forms enough dark, with when head rest is pressed into recess 72 and wide cut recess 71 with the outer peripheral face of tubing 60, bulged-in head rest does not contact with bottom surface 72c, the 71c of recess 72 and wide cut recess 71 with the inner peripheral surface of tubing 60.
In addition, as shown in Figure 4, be formed with the notch 76 that a side of female mold 70 is carried out otch.
In addition, second be pressed into sword 51 for its right flank 51b and left surface with axially vertical and have from the bottom of left surface an inclination sword 51 of the horizontal plane that extends in parallel vertically towards the inclined plane of right flank 51b bottom decline with from the down position on this inclined plane.This inclination sword 51 forms two corresponding to forming two wide cut recess 71 on the right side of rectangle sword 52.Length from the right flank 52b of rectangle sword 52 to the right flank 51b of the inclination sword 51 adjacent with the right side is 20mm, and the length from the right flank 51b of this inclination sword 51 to the right flank 51b of next adjacent with right side inclination sword 51 also is 20mm.
In addition, rectangle sword 52 and inclination sword 51 are longer to the length of the dark direction of paper with the paper front from Fig. 1 of the slot part 62,61 on the tubing 60 than being formed on head rest, and extend in the direction.
In the slot part manufacturing process of the tubing 60 that has used this kind mould, at first, by mold 20 and bed die 30 from clamping up and down and fixedly head rest with tubing 60, and as shown in Figure 1, with female mold 70 be inserted into axle along about the head rest that extends with the inside, cavity of tubing 60.
At this moment, behind stamping-out, as shown in Figure 3, make the right flank 52b of rectangle sword 52 be positioned at the right foreign side of 0.1mm of the right inwall 72b of recess 72.When being in this position, the left surface of rectangle sword 52 is positioned at the 0.1mm left side foreign side of the left inwall of recess 72.Similarly, the right flank 51b of inclination sword 51 is positioned at the right foreign side of 0.1mm of the right inwall 71b of wide cut recess 71.So, for respect to rectangle sword 52 and inclination sword 51 location indentations 72 and wide cut recess 71 reliably, and use known detent mechanism (not shown) in the mould applications.
Next, positive mold 50 is moved to vertical lower, the outer peripheral face of head rest with tubing 60 is pressed into to recess 72 and wide cut recess 71 by rectangle sword 52 and inclination sword 51, thus at head rest with forming rectangular channel 62 and tipper 61 on the outer peripheral face of tubing 60.
At last, turn 90 degrees, extract female mold 70 with tubing 60 so that the mode of notch 76 towards the top of female mold 70 revolved female mold 70 from head rest.
Slot part manufacturing process according to above tubing 60, because being pressed into sword 52, first of positive mold 50 is its left and right side 52a, 52b and axial vertical and left and right sides width are than the left and right sides inwall 72a of recess 72, the rectangle sword 52 that width between the 72b is wide, as the left and right side 52a that makes rectangle sword 52,52b lays respectively at the left and right sides inwall 72a of recess 72, after the left and right sides foreign side of 72b, form slot part 62 by rectangle sword 52 stamping-out tubing 60, therefore shown in Fig. 5 (a) (arrow among the figure is represented the stress in each one of tubing), the left and right sides inwall 72a of recess 72, the upper surface of 72b and not only being pressed in the recess 72 of axially overlapping by the position of the head rest of rectangle sword 52 stamping-outs with tubing 60, and also to produce distortion with respect to left and right sides foreign side.
In addition, since second be pressed into sword 51 for its right flank 51b with axially vertical and have from the left surface bottom inclination sword 51 of the horizontal plane that extends in parallel vertically towards the inclined plane of right flank 51b bottom decline with from the down position on this inclined plane, be positioned at the right foreign side of right inwall 71b of wide cut recess 71 as the right flank 51b that makes inclination sword 51 after, form slot part by rectangle sword 52 and inclination sword 51 stamping-out head rests with tubing 60, therefore the upper surface of the right inwall 71b of wide cut recess 71 not only is pressed in the wide cut recess 71 with the position of the head rest that is tilted sword 51 stamping-outs that axially overlaps with tubing 60, and also will produce distortion with respect to right foreign side.
Prior art shown in Fig. 5 (b) is owing to the axial width of rectangle sword 52 equates with the axial width of recess 42, therefore follow the position that is punched to be pressed into recess 42 inside with tubing 10, successfully be not out of shape in the mode that is drawn into recess 42 by near the position that is punched of the tubing 10 of direct stamping-out yet, different with above-mentioned prior art, in the present embodiment, the power that acts on the foreign side to the left and right on the coincidence position in recess 72 and the wide cut recess 71 acts as and makes not by be punched the power that near position in the mode that be drawn into recess 72 and wide cut recess 71 be out of shape of the head rest of direct stamping-out with tubing 60, therefore, the left and right sides inwall 62a of rectangular channel 62, the right inwall 61b upper end of 62b upper end and tipper 61 is difficult to form the R shape of difficult distortion.And even hypothesis forms the R shape, also the R shape than prior art is little.Specifically, when existing R was shaped as 0.3mm (R0.3) left and right sides, the R in the present embodiment was shaped as 0.1mm (R0.1).Even the head rest that therefore be thin-walled is with tubing 60, the also actual grade of shaping rectangular channel 62 and tipper 61 more deeply, even so when motor vehicle crashes, head rest also is difficult to come off from seat.
In addition, because the degree of depth of recess 72 and wide cut recess 71 forms the inner peripheral surface of bulged-in tubing 60 when the outer peripheral face with tubing 60 is pressed into recess 72 and wide cut recess 71 and does not contact with bottom surface 72c, the 71c of recess 72 and wide cut recess 71, therefore, do not have the contact resistance between bottom surface 72c, the 71c of the inner peripheral surface of tubing 60 and recess 72 and wide cut recess 71, thereby behind stamping-out, can extract female mold 70 from head rest with tubing 60 with less power.
In addition, as shown in Figure 6, also can carry out the processing of R shape or chamfering and become about the axial amount of coincidence (is 0.1mm at this) with rectangle sword 52 or inclination sword 51 upper end of the right inwall 71b of left and right sides inwall 72a, the 72b of recess 72 and wide cut recess 71.So, can reduce female mold 70 and the contact resistance of head rest, therefore behind stamping-out, can extract female mold 70 from head rest with tubing 60 with less power with tubing 60.
In addition, also can to the lower end of the right flank 51b of left and right side 52a, the 52b of rectangle sword 52 and inclination sword 51 carry out the processing of R shape or chamfering become with inwall 72a, the 72b of recess 72 or wide cut recess 71, the axial amount of coincidence of 71b (is 0.1mm at this) about.So, can prevent that head rest is with the rectangular channel 62 of tubing 60 and breaking and the crack of tipper 61 bottoms.
(second embodiment)
Next, with reference to Fig. 7 and Fig. 8, the slot part manufacturing process of the tubing 60 of second embodiment of the present invention is described.In addition, to the additional same-sign of the part identical with first embodiment.
The difference with first embodiment of present embodiment is the part of the mould that is pressed into sword 81,82 and accompanies with it of positive mold 80, and other structural element is identical with first embodiment.
In addition, second be pressed into sword 51 for being mounted to the circular cone sword 81 that rotates cone shape freely around the rotating shaft parallel with axle.In its cross sectional shape, its right flank 81b is with axially vertical and have the inclined plane that descends from left surface 81a towards right flank 81b bottom and a horizontal plane from the down position on this inclined plane along described axially parallel extension.This circular cone sword 81 forms two corresponding to forming two wide cut recess 71 on the right side of cylinder sword 82.
And the right flank 82b of cylinder sword 82 is positioned at the right foreign side of 0.1mm of the right inwall 72b of recess 72, and the left surface 82a of cylinder sword 82 is positioned at the 0.1mm left side foreign side of the left inwall 72a of recess 72.Meanwhile, the right flank 81b of circular cone sword 81 is positioned at the right foreign side of 0.1mm of the right inwall 71b of wide cut recess 71.
In the slot part manufacturing process of present embodiment, at first, also fixedly head rest is with tubing 60 by mould, and it is inner with the cavity of tubing 60 that female mold 70 is inserted into head rest.
Next, positive mold 80 is moved downwards, by the cylinder sword 82 that rolls and circular cone sword 81 indenters by outer peripheral face with tubing 60, thereby formation rectangular channel 62 and tipper 61.
At last, extract female mold 70 from head rest with tubing 60.
Slot part manufacturing process according to above tubing 60, even rotary type be pressed into sword 81,82, also be pressed into sword 51 by first embodiment, 52 situations of carrying out stamping-out in the same manner, the power that acts on the foreign side to the left and right on cylinder sword 82 in recess 72 and the wide cut recess 71 and circular cone sword 81 and the position that recess 72 and wide cut recess 71 overlap in the axial direction acts as and makes not by be punched the power that near position in the mode that be drawn into recess 72 and wide cut recess 71 be out of shape of the head rest of direct stamping-out with tubing 60, so the left and right sides inwall 62a of rectangular channel 62, the right inwall 61b upper end of 62b upper end and tipper 61 is difficult to form the R shape of difficult distortion.
At this, also can replace the cylinder sword 82 in second embodiment, and form the tabular sword 83 of the long strip-board shape that does not rotate shown in Figure 9.This tabular sword 83 similarly is pressed into recess 72 with head rest with the outer peripheral face of tubing 60 to vertical direction processing with cylinder sword 82.This tabular sword 83 as shown in figure 10, the bottom of tabular sword 83 with head rest be linearity with the inclined plane 84a of tubing 60 butts.
In addition, as shown in figure 11, the inclined plane 84a of tabular sword 84 also can be curve-like.In this case, owing to can make head rest produce distortion at leisure, therefore not be used in head rest and can form slot part 61,62 with forming inclined to one side wall portion on the tubing 60 with the outer peripheral face of tubing 60.
In addition, in first, second embodiment, for convenience of explanation and about having determined, reversed left to right when for example observing certainly from the paper of Fig. 1 is inboard.Determine up and down too.
In addition, having formed slot part 61,62 at head rest on tubing 60, but be not limited thereto, also can be the tubing 60 that uses in other purposes.
In addition, positive mold 50,80 is descended and carried out stamping-out, but be not limited thereto, also can make tubing 60 rise and carry out stamping-out towards positive mold 50,80 with female mold 70 or bed die 30.
In addition, in the first embodiment, positive mold 50 possesses rectangle sword 52 and inclination sword 51, but according to the purposes of tubing 60, also can be the positive mold 50 that only possesses the either party.
In addition, also can increase and decrease the number of rectangle sword 52 or inclination sword 51 according to the purposes of tubing 60.Certainly this moment need make recess 72 corresponding to rectangle sword 52 and wide cut recess 71 is increased and decreased corresponding to inclination sword 51, and needs the position of the relative recess 72 of involutory and rectangle sword 52 or the position of the wide cut recess 71 relative with inclination sword 51.
In addition, left and right sides inwall 72a, the 72b of recess 72 is 0.1mm with the right inwall 71b of the axial amount of coincidence of rectangle sword 52 or wide cut recess 71 with the axial amount of coincidence of inclination sword 51, but its optimum value when to be the wall thickness of tubing 60 be 1.5mm, this coincidence amount also can be 0.15mm.Wherein, this coincidence amount is followed in this during less than 0.1mm, and it is big that the R shape of slot part 61,62 upper ends becomes.On the other hand, this overlaps when excessive, and the connecting airtight property (contact resistance) of the lower surface of the intersection in the tubing 60 and female mold 70 rises, and therefore the rotations of 90 degree when tubing 60 is extracted female mold 70 need energetically.
In addition, processing of R shape or chamfering have been carried out in whole upper ends to left and right sides inwall 71a, the 71b of left and right sides inwall 72a, the 72b of recess 72 and wide cut recess 71, also have certain effect but described processing is not implemented in whole inwall 72a, 72b, 71a, 71b upper end.
Similarly, also can not implement processing to the processing of R shape or the chamfering of the lower end of the right flank 51b of left and right side 52a, the 52b of rectangle sword 52 and inclination sword 51 to whole side 52a, 52b, 51b lower end.
In addition, in second embodiment, positive mold 50 possesses cylinder sword 82 and circular cone sword 81, but according to the purposes of tubing 60, also can be the positive mold 50 that only possesses the either party.
In addition, also can increase and decrease the number of cylinder sword 82 or circular cone sword 81 according to the purposes of tubing 60.
In addition, about the axial amount of coincidence of right inwall 71b with the circular cone sword 81 of the axial amount of coincidence of left and right sides inwall 72a, the 72b of recess 72 and cylinder sword 82 or wide cut recess 71, also with the situation of rectangle sword 52 or inclination sword 51 in the same manner, can suitably change.
In addition, in second embodiment also with first embodiment similarly, also can implement processing of R shape or chamfering, and can implement processing of R shape or chamfering the lower end of at least one among the right flank 51b of left and right side 52a, the 52b of rectangle sword 52 and inclination sword 51 at least one the upper end among left and right sides inwall 71a, the 71b of left and right sides inwall 72a, the 72b of recess 72 and wide cut recess 71.
Claims (8)
1. the slot part manufacturing process of a tubing, the cavity of the tubing that extends about the axle edge is inner, with about the bar-shaped female mold insertion that forms at the periphery upper surface of inwall and described recess axially vertical and the cross section rectangular shape, make to have and move downwards with the corresponding positive mold that is pressed into sword of described recess and the outer peripheral face of described tubing is pressed into to described recess, thereby on the outer peripheral face of described tubing, form slot part, the slot part manufacturing process of described tubing is characterised in that
The sword that is pressed into of described positive mold is its left and right side and described axially vertical and rectangle sword that left and right sides width is wideer than the width between the left and right sides inwall of described recess, and the inner peripheral surface that described concave depth forms bulged-in described tubing when the outer peripheral face with described tubing is pressed into described recess does not contact with the bottom surface of described recess
Lay respectively at the left and right sides foreign side of left and right sides inwall of described recess when the left and right side that makes described rectangle sword after, form described slot part by the described tubing of described rectangle sword stamping-out.
2. the slot part manufacturing process of a tubing, the cavity of the tubing that extends about the axle edge is inner, with about the bar-shaped female mold insertion that forms at the periphery upper surface of inwall and described recess axially vertical and the cross section rectangular shape, to the outer peripheral face with the described tubing that moves with the corresponding positive mold that is pressed into sword of described recess be pressed into downwards to described recess, thereby on the outer peripheral face of described tubing, form slot part, the slot part manufacturing process of described tubing is characterised in that
Described positive mold be pressed into sword for its right flank with described axially vertical and have the inclined plane and an inclination sword of decline from left surface towards the right flank bottom from the down position on this inclined plane along the horizontal plane of described axially parallel extension, and the inner peripheral surface that described concave depth forms bulged-in described tubing when the outer peripheral face with described tubing is pressed into described recess does not contact with the bottom surface of described recess
Be positioned at the right foreign side of right inwall of described recess when the right flank that makes described inclination sword after, form described slot part by the described tubing of described inclination sword stamping-out.
3. the slot part manufacturing process of a tubing, the cavity of the tubing that extends about the axle edge is inner, with about the bar-shaped female mold insertion that forms at the periphery upper surface of inwall and described recess axially vertical and the cross section rectangular shape, make to have and move downwards with the corresponding positive mold that is pressed into sword of described recess and the outer peripheral face of described tubing is pressed into to described recess, thereby on the outer peripheral face of described tubing, form slot part, the slot part manufacturing process of described tubing is characterised in that
The sword that is pressed into of described positive mold is the rotating shaft rotation short cylindrical shape freely that is mounted to around parallel with described axle, and in its cross sectional shape, its left and right side and described axially vertical and cylinder sword that left and right sides width is wideer than the width between the left and right sides inwall of described recess, and the inner peripheral surface that described concave depth forms bulged-in described tubing when the outer peripheral face with described tubing is pressed into described recess does not contact with the bottom surface of described recess
Lay respectively at the left and right sides foreign side of left and right sides inwall of described recess when the left and right side that makes described cylinder sword after, form described slot part by the described tubing of described cylinder sword stamping-out.
4. the slot part manufacturing process of a tubing, the cavity of the tubing that extends about the axle edge is inner, with about the bar-shaped female mold insertion that forms at the periphery upper surface of inwall and described recess axially vertical and the cross section rectangular shape, to the outer peripheral face with the described tubing that moves with the corresponding positive mold that is pressed into sword of described recess be pressed into downwards to described recess, thereby on the outer peripheral face of described tubing, form slot part, the slot part manufacturing process of described tubing is characterised in that
The sword that is pressed into of described positive mold is the rotating shaft rotation cone shape freely that is mounted to around parallel with described axle; And in its cross sectional shape; Its right flank is with described axially vertical and have the inclined plane that descends from left surface towards the right flank bottom and a circular cone sword from the down position on this inclined plane along the horizontal plane of described axially parallel extension; And the inner peripheral surface that the degree of depth of described recess forms bulged-in described tubing when the outer peripheral face with described tubing is pressed into described recess does not contact with the bottom surface of described recess
Be positioned at the right foreign side of right inwall of described recess when the right flank that makes described circular cone sword after, form described slot part by the described tubing of described circular cone sword stamping-out.
5. the slot part manufacturing process of a tubing, the head rest that extends about the axle edge is inner with the cavity of tubing, with about inwall and described axially vertical and cross section rectangular shape recess and than the wide cut recess of this recess wide cut in the bar-shaped female mold insertion of leaving under the described axial state in the formation of periphery upper surface, make to have and be pressed into the positive mold that sword and second is pressed into sword with described recess and described wide cut recess corresponding first and move downwards and the outer peripheral face of described head rest with tubing is pressed into to described recess, thereby on the outer peripheral face of described head rest, form slot part with tubing, the slot part manufacturing process of described tubing is characterised in that
First of described positive mold is pressed into sword and is its left and right side and described axially vertical and rectangle sword that left and right sides width is wideer than the width between the left and right sides inwall of described recess, and second of described positive mold be pressed into sword for its right flank with described axially vertical and have the inclined plane and an inclination sword of decline from left surface towards the right flank bottom from the down position on this inclined plane along the horizontal plane of described axially parallel extension, in addition, described recess and described wide cut concave depth form when described head rest is pressed into described recess and described wide cut recess with the outer peripheral face of tubing bulged-in described head rest and do not contact with the bottom surface of described recess and described wide cut recess with the inner peripheral surface of tubing
Lay respectively at the left and right sides foreign side of the left and right sides inwall of described recess when the left and right side that makes described rectangle sword, and after the right flank that makes described inclination sword is positioned at the right foreign side of right inwall of described wide cut recess, form described slot part with tubing by described rectangle sword and the described head rest of inclination sword stamping-out.
6. the slot part manufacturing process of a tubing, the head rest that extends about the axle edge is inner with the cavity of tubing, with about inwall and described axially vertical and cross section rectangular shape recess and than the wide cut recess of this recess wide cut in the bar-shaped female mold insertion of leaving under the described axial state in the formation of periphery upper surface, make to have and be pressed into the positive mold that sword and second is pressed into sword with described recess and described wide cut recess corresponding first and move downwards and the outer peripheral face of described head rest with tubing is pressed into to described recess, thereby on the outer peripheral face of described head rest, form slot part with tubing, the slot part manufacturing process of described tubing is characterised in that
It is the rotating shaft rotation short cylindrical shape freely that is mounted to around parallel with described axle that first of described positive mold is pressed into sword, and in its cross sectional shape, its left and right side and described axially vertical and cylinder sword that left and right sides width is wideer than the width between the left and right sides inwall of described recess, and it is the rotating shaft rotation cone shape freely that is mounted to around parallel with described axle that second of described positive mold is pressed into sword, and in its cross sectional shape, its right flank is with described axially vertical and have the inclined plane that descends from left surface towards the right flank bottom and a circular cone sword from the down position on this inclined plane along the horizontal plane of described axially parallel extension, in addition, described recess and described wide cut concave depth form when described head rest is pressed into described recess and described wide cut recess with the outer peripheral face of tubing bulged-in described head rest and do not contact with the bottom surface of described recess and described wide cut recess with the inner peripheral surface of tubing
Lay respectively at the left and right sides foreign side of the left and right sides inwall of described wide cut recess when the left and right side that makes described cylinder sword, and after the right flank that makes described circular cone sword is positioned at the right foreign side of right inwall of described wide cut recess, form described slot part with tubing by described cylinder sword and the described head rest of circular cone sword stamping-out.
7. according to the slot part manufacturing process of each described tubing in the claim 1～6, it is characterized in that,
Chamfering is carried out in the upper end of at least one in the left and right sides inwall of the left and right sides inwall of described recess, described wide cut recess.
8. according to the slot part manufacturing process of each described tubing in the claim 1～7, it is characterized in that,
Chamfering is carried out in the lower end of at least one in the right flank of the left and right side of the right flank of the left and right side of described rectangle sword, described inclination sword, described cylinder sword, described circular cone sword.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-242897 | 2009-10-21 | ||
| JP2009242897A JP4477695B1 (en) | 2009-10-21 | 2009-10-21 | Pipe material groove forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102039337A true CN102039337A (en) | 2011-05-04 |
| CN102039337B CN102039337B (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010517440.6A Expired - Fee Related CN102039337B (en) | 2009-10-21 | 2010-10-19 | The slot part forming method of tubing |
Country Status (2)
| Country | Link |
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| JP (1) | JP4477695B1 (en) |
| CN (1) | CN102039337B (en) |
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|---|---|---|---|---|
| CN110355302A (en) * | 2019-08-13 | 2019-10-22 | 格力电器（郑州）有限公司 | A kind of anti-pushing-down mechanism |
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| JP2000079422A (en) * | 1998-07-08 | 2000-03-21 | Nok Corp | Method for press-working of projecting part, press- working member with projecting part and sealing device |
| JP2002002430A (en) * | 2000-06-27 | 2002-01-09 | Inoac Corp | Notch molding device for head rest stay and notch moding method |
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| JPS52101748U (en) * | 1976-01-30 | 1977-08-02 | ||
| JPS5933034A (en) * | 1982-08-16 | 1984-02-22 | Hitachi Ltd | Bead forming method |
| JPS61107677A (en) * | 1984-10-30 | 1986-05-26 | 富士通株式会社 | Manufacture of conductor terminal |
| JPS635829A (en) * | 1986-06-24 | 1988-01-11 | Matsushita Electric Works Ltd | Punching method for plate material |
| JP3429658B2 (en) * | 1998-01-19 | 2003-07-22 | 日本碍子株式会社 | Method for forming constriction in cylindrical member |
| JPH11254055A (en) * | 1998-03-12 | 1999-09-21 | Topy Ind Ltd | Method for shear-punching in two processes in same direction |
| JP2001300647A (en) * | 2000-04-24 | 2001-10-30 | Sankyo Seiki Mfg Co Ltd | Manufacturing method of pressed part and manufacturing method of laminated core for motor |
| JP4023714B2 (en) * | 2001-11-29 | 2007-12-19 | 日本テクニカ株式会社 | Headrest stay |
| US7424817B2 (en) * | 2003-07-25 | 2008-09-16 | Inoac Corporation | Method of working recessed portion in headrest stay and press apparatus for working recessed portion in headrest stay |
| JP4465483B2 (en) * | 2004-12-28 | 2010-05-19 | 株式会社ソーワ・テクノ | Groove processing equipment for metal pipe members |
| JP4496102B2 (en) * | 2005-02-08 | 2010-07-07 | 市川鐵工株式会社 | Notch forming device for headrest stay |
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- 2009-10-21 JP JP2009242897A patent/JP4477695B1/en active Active
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| CN1224375A (en) * | 1996-09-06 | 1999-07-28 | 松下电器产业株式会社 | Method of fabricating shaft from metal plate |
| JP2000079422A (en) * | 1998-07-08 | 2000-03-21 | Nok Corp | Method for press-working of projecting part, press- working member with projecting part and sealing device |
| JP2002002430A (en) * | 2000-06-27 | 2002-01-09 | Inoac Corp | Notch molding device for head rest stay and notch moding method |
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| JP2002066673A (en) * | 2000-08-25 | 2002-03-05 | Oda Gisho:Kk | Method for forming groove in pipe |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2011088178A (en) | 2011-05-06 |
| CN102039337B (en) | 2015-11-25 |
| JP4477695B1 (en) | 2010-06-09 |
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