CN104178943B

CN104178943B - The hook line apparatus of sewing machine seam hook group

Info

Publication number: CN104178943B
Application number: CN201310196716.9A
Authority: CN
Inventors: 曾贤长
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-23
Filing date: 2013-05-23
Publication date: 2016-08-17
Anticipated expiration: 2033-05-23
Also published as: CN104178943A

Abstract

The invention discloses the hook line apparatus of a kind of sewing machine seam hook group, its seam hook group is that the swing arm top that drive shaft drives is provided with seam hook and lead-in wire part, wherein, seam hooks top and has the through wires hole of a trunking and a trunking end for suture through accommodating, and seam hooks middle section and has guide sliding part for a hook line piece across sliding thereon, and coordinate the line hooking line piece front end to hook, this line hooks and can catch on suture by the hook wire casing hooked with line between this through wires hole and lead-in wire part, make suture can rapidly enter in trunking, and by the structure of the elastic blocking between this seam hook and hook line piece, make this hook line piece can be able to be positioned after really hooking line on this seam hook and guarantee that suture enters the steady statue in this trunking, and reach to hook purpose stable after line quickly hooks line.

Description

The hook line apparatus of sewing machine seam hook group

Technical field

The present invention relates to a kind of sewing machine selvedge circumferential weld automatically hook line apparatus, particularly relate to carry out the seam of circumferential weld operation What hook group seam hook was above arranged hooks line apparatus automatically.

Background technology

Carry out the circumferential weld operation of selvedge by sewing machine to coordinate and be provided with a circumferential weld group, for making the suture in this circumferential weld group can be by soon Certain connecting at seam hook of speed, has many automatic threading devices to be developed, such as Taiwan the 80208197th " selvedge The automatic threading device of sewing machine " it is the hook line structure being pivoted with a pivot form at seam hook, and after it hooks line, suture There is no the safest being closed, it is easy to during seam hooks back and forth circumferential weld, hooked by foreign object and hold and depart from seam and hook or fracture, Therefore have its improvement necessity；Another or have other form, precisely because structure all belongs to complicated, can quickly hook line or threading for asking again, Stability after causing threading on the contrary or hooking line is the highest.

For making this threading or hooking the mechanism of line and more simplify rationally, reach quickly to hook more simultaneously line and after hook line suture in hook The purpose that on line, degree of stability is high, is the hook line apparatus of a kind of sewing machine seam hook group developing the present invention.

Summary of the invention

The technical problem to be solved is to provide the hook line apparatus of a kind of sewing machine seam hook group.

For solving the problems referred to above, the present invention provides the hook line apparatus of a kind of sewing machine seam hook group, the circumferential weld group tool of this sewing machine Having one is the swing arm that a drive shaft drives, and described swing arm free end is provided with a seam and hooks, and described seam hooks free end and is provided with a threading Hole passes for a suture, through wires hole end form a trunking along the surface that this seam hooks；

Described seam hooks middle section and sets a guide sliding part, and described guide sliding part one end is guide sliding part end, and the other end is guide sliding part top, One hooks line piece is slidedly arranged on this guide sliding part, and the end of this hook line piece is provided with a hook line portion, and this hook line piece is positioned at this guide sliding part end End, this suture is penetrated this trunking by this hook line portion and is passed by this through wires hole of this trunking another end；

Described hook line piece is by this guide sliding part tip displacement to this guide sliding part top, and described hook line portion can at this guide sliding part top Passing for this suture, this suture may pass through this through wires hole, and this hook line piece mobile can be entered to this guide sliding part end, this suture Enter in this trunking.

Further, described hook line portion is to have a line to hook, and forms one and have the notch hook line towards this guide sliding part end Groove；

Described suture in after this through wires hole, described hook line piece by this guide sliding part top to this guide sliding part tip displacement time, This suture can be pulled and enter in this trunking by this notch of described hook line piece.

Further, described hook line portion be in one perforation form place hole.

Further, described seam hooks free end and is provided with a hook part, and described hook part arranges this trunking, the one of described trunking End this through wires hole the other end adjacent is then provided with the groove base portion of a turnover, and this line of described hook line piece hooks and is relatively provided with hook base Portion.

Further, this guide sliding part top that described seam hooks is a saddle, and this guide sliding part is provided with certain keyhole, this hook line piece To form for an elongated lamellar body turnover, top be a section be inverted U-shaped one across portion, should be across portion across on this saddle, should Extend a large-area sidewall across side, portion, this sidewall is provided with elongated poroid guide groove in this across portion's parallel beneath, for one Guide gip is screw-locked at this through this guide groove and determines keyhole, and this hook line piece hooks in seam and the most mutually guides.

Further, it is provided with a mutual portion that places restrictions in re-entrant angle shape and non-return portion bottom described guide sliding part end outer peripheral edge, and is somebody's turn to do The outwardly guide lug in guide sliding part top, is extended into leading slope part by tip bottom this guide lug, and prolongs in leading slope part bottom level Stretching out bullet stop, the sidewall of this hook line piece end is provided with one relative to place and is perpendicular to the stop that this sidewall horizontal is stretched out, this sidewall This guide sliding part top relatively extends a pulling part being cased with gum cover, is provided with certain shell hole, closely at this sidewall this pulling part nearly Determining to be provided with certain hole at shell hole, determine to be provided with a perforation at shell hole away from this, the position of this perforation is back to this seam in this hook line piece Hook guide sliding part end stroke original position time, the bottom of this guide lug of positive alignment, one only bullet part one end be round be delineation portion, should One end, delineation portion is vertically bent into fixed end, and the other end extends horizontally to be had resilient elongated rod shape and extends in ending vertical Pushed section, certain bolt that plays is bolt form, and screw rod end is locked in this through this delineation portion and determines shell hole, and this fixed end penetrates this and determines hole, This pushed section passes this perforation, and this perforation has the space movable in its hole for pushed section.

Further, a return unit is located at described seam hook and hooks between line piece.

For solving the problems referred to above, the present invention provides the hook line apparatus of a kind of sewing machine seam hook group, is that to have one be a driving The swing arm that axle is driven, described swing arm free end is provided with a seam and hooks, and described seam hooks free end and is provided with a through wires hole for a suture Pass, through wires hole end form a trunking along the surface that this seam hooks；

Described hook line piece is by this guide sliding part tip displacement to this guide sliding part top, and this hook line portion is available at this guide sliding part top This suture passes, and this suture may pass through this through wires hole, and this hook line piece mobile can enter to this guide sliding part end, this suture In this trunking；

A non-return portion it is provided with bottom described guide sliding part end outer peripheral edge, and the outwardly guide lug in this guide sliding part top, this is led Eardrum portion is extended into leading slope part by tip, and the sidewall of this hook line piece end is provided with one relative to place and is perpendicular to this sidewall horizontal and stretches out Stop, this sidewall extends a pulling part relative to this guide sliding part top, is provided with an only bullet part at this sidewall this pulling part nearly, Only should be fixed on this sidewall in bullet part one end, another end has the pushed section of an elasticity, and this hook line piece is positioned at this guide sliding part end, should Pushed section just can be butted on this leading slope part root edge, and this hook line piece provides an elastic prestressing, and this stop can be equipped in this non-return portion shape Become retaining.

Further, be additionally provided with bottom described guide sliding part end outer peripheral edge one with the portion that places restrictions in re-entrant angle shape mutually of non-return portion, institute Stating leading slope part bottom level and extend bullet stop, described hook line piece sidewall is provided with certain shell hole, closely determines to be provided with at shell hole necessarily Hole, determines to be provided with a perforation at shell hole away from this, and the position of this perforation is back to this seam in this hook line piece and hooks guide sliding part end stroke Original position time, the bottom of this guide lug of positive alignment, one only bullet part one end be round be delineation portion, one end, described delineation portion is vertical Being bent into fixed end, the other end extends horizontally to be had resilient elongated rod shape and extends into pushed section in ending vertical, necessarily plays bolt For bolt form, screw rod end is locked in this through this delineation portion and determines shell hole, and described fixed end penetrates this and determines hole, and this pushed section passes This perforation, this perforation has the space movable in its hole for pushed section.

The hook line apparatus of sewing machine of the present invention seam hook group, has a guide sliding part and forms the beginning of guide sliding part on seam hooks Being slidably equipped with a hook line piece between end and end, suture tempted on guide sliding part by this hook line piece mat while sliding, make suture certain Arrive location, complete seam and hook the operation of threading, and the purpose reaching threading immediately that this hook line piece can be certain.

Accompanying drawing explanation

Fig. 1 is that the circumferential weld group seam of the present invention hooks combination stereoscopic schematic diagram.

Fig. 2 is the exploded perspective schematic diagram of the present invention.

Fig. 3 is another angle three-dimensional appearance schematic diagram of Fig. 1 of the present invention.

Fig. 4 is that the present invention pulls hook line piece slide on seam hooks and coordinate the action schematic diagram hooking line operation.

Fig. 5 is that the present invention hooks line piece in the action schematic diagram of seam hook solution pin.

Fig. 6 is that the present invention hooks line piece and hooks in seam and be pulled to the action schematic diagram of suture opposite side.

Fig. 7 is that the present invention hooks another embodiment schematic diagram of line piece.

Description of reference numerals

10 be drive shaft 11 be swing arm

20 be seam hook 30 be lead-in wire part

110 be needle tray 111 be part groove

12 is that to determine pintle 13 be locking member bolt

21 be joint portion 22 be hook part

220 be through wires hole 221 be trunking

40 be hook line piece 50 be return unit

60 is that only bullet part 70 is suture

222 be groove base portion 23 be guide sliding part

230 be saddle 231 be Gou Dingbu

232 is that to place restrictions on portion 233 be non-return portion

24 be guide lug 240 be leading slope part

241 be play stop 234 be to determine keyhole

80 be guide gip 41 be across portion

42 be sidewall 420 be hook base portion

421 be that line hooks 422 is notch

423 be hook wire casing 424 be stop

425 be guide groove 426 be pulling part

427 is that to determine shell hole 428 be to determine hole

429 be perforation 410 be hook ear

600 be delineation portion 601 be fixed end

602 be pushed section 61 be to determine bullet bolt

Detailed description of the invention

As shown in Figure 1, 2, 3, the sewing machine circumferential weld group of the present invention, is to have a swing arm 11 driven for drive shaft 10, This swing arm 11 free end is additionally provided with a seam hook 20 and lead-in wire part 30, and this seam hooks 20 middle sections and is slidably equipped with a hook line piece 40, Coordinate a return unit 50 to hook to be located between this seam hook 20 and this hook line piece 40, make this hook line piece 40 can automatically return in situ, And in this hook line piece 40, it is additionally provided with an only bullet part 60, so that during this hook line piece 40 homing, bullet can be stopped by this Part 60 hooks the design of 20 opposed configuration with seam, to guarantee this hook line piece 40 positioning stablity and not this hook line of rollback, i.e. mat The sliding movement of part 40 can quickly hook line arrival location by hooking the suture 70 between 20 and lead-in wire part 30 through seam, and joins Close aforementioned flexible pull hook line piece 40 and place restrictions on the structure of rollback, reach Quick-threading and hook line and the mesh of positioning stablity 's.

Wherein, described swing arm 11 one end and drive shaft 10 are affixed and in the gestalt movement swung back and forth, and this swing arm 11 is another The free end surface of end is arranged with adjacent needle tray 110 and part groove 111, and this needle tray 110 is in shallow slot shape with part groove 111 And forward with upwards open form, be respectively cooperating with the screw lock of certain pintle 12 and a locking member bolt 13 to fix this seam hook 20 With this lead-in wire part 30, this lead-in wire part 30 is to be bent into the opening hook arrangement towards this swing arm 11 direction for the elastic body of rod, Enter this lead-in wire part 30 for suture 70 thus opening to go between scope.

It is plates and the S-shaped structure being pointed at that described seam hooks 20, and wherein, its one end is that the joint portion 21 of straight is stretched into In this swing arm 11 needle tray 110 and be that this determines pintle 12 through fixing, the described hook 20 that stitches stretches out the freedom of this needle tray 110 End forms the hook part 22 of hook, and this hook part 22 end runs through a through wires hole 220 and passes for suture 70, and by through wires hole 220 ends form the trunking 221 of an elongated shallow ridges shape along the surface of this hook part 22, and one end of this trunking 221 is adjacent should Through wires hole 220 the other end is then provided with a turnover certain thickness groove base portion 222, to coordinate this hook line piece 40 to return back to Support locator in situ.

The invention is characterized in that the setting being this hook line piece 40 and this seam coordinated with this hook line piece 40, to hook 20 relative Structure, wherein, this seam hooks 20 middle sections, is i.e. provided with a straight guide sliding part between this hook part 22 and this joint portion 21 23, define this guide sliding part 23 top and adjoin with this joint portion 21, and this guide sliding part 23 end and this groove of this hook part 22 Base portion 222 adjoins, this guide sliding part 23 top be a saddle 230 for this hook line piece 40 across cunning, this guide sliding part 23 end The hook being provided with a depression at nearly hook part, outer peripheral edge 22 determines portion 231, and is provided with phase bottom this guide sliding part 23 end outer peripheral edge Adjoining the portion that places restrictions on 232 in re-entrant angle shape and non-return portion 233 mutually, it is about parallel with this guide sliding part 23 root edge that this places restrictions on portion 232, And about place restrictions on portion 232 with this vertical in this non-return portion 233, and this guide sliding part 23 top protrudes a guide lug 24, this guide lug 24 Bottom is extended into leading slope part 240 by tip, and extends bullet stop 241 in leading slope part 240 bottom level, is somebody's turn to do to coordinate Only bullet part 60 elasticity hooked in line piece 40 holds, and is additionally provided with certain keyhole 234, leads for one at this nearly top of guide sliding part 23 Bolt 80 enters this through this hook line piece 40 screw lock and determines keyhole 234 to guide this hook line piece 40 and to make this hook line piece 40 keep not Depart from the state of this guide sliding part 23.

Described hook line piece 40 is to form for an elongated lamellar body turnover, top be a section be inverted U-shaped across portion 41, should be across Portion 41, across on this saddle 230, should extend a large-area sidewall 42 across side, portion 41, the end of this sidewall 42 to Upper process one hooks line portion A, and this hook line portion A is can to have different embodiments in response to different demands, with this legend, and should Hooking line portion A is to have a hook base portion 420, and is stretched out a line hook 421 by this hook base portion 420 top upwards the most outside skew back, Make this line hook between 421 and this hook base portion 420 and form the notch 422 hook wire casing 423 towards this guide sliding part 23 end, and This sidewall 42 is additionally provided with a stop 424 protruded out, this sidewall 42 at the lower corner end of this guide sliding part 23 end relatively Being provided with elongated poroid guide groove 425 in this across portion 41 parallel beneath, pass for this guide gip 80, this guide gip 80 of mat coordinates This guide groove 425 mutually guides, and the top of this sidewall 42 this guide sliding part 23 relative extends a pulling part being cased with gum cover 426, elapse this hook line piece 40 for user finger and be used, and be provided with certain at this sidewall 42 this pulling part 426 nearly Shell hole 427, closely determines to be additionally provided with certain hole 428 at shell hole 427, determines to be additionally provided with a perforation 429 at shell hole 427 away from this, The position of this perforation 429 when this hook line piece 40 is back to the original position that this seam hooks 20 guide sliding part 23 end strokes, positive alignment The bottom of this guide lug 24, and in this across middle section, portion 41 the most horizontal-extending have one prominent and there is the hook ear of perforation form 410, hook for return unit 50 one end and hold, this return unit 50 is for an elongated rolled spring, the another end of this return unit 50 Hook and determine portion 231 in this hook, with provide this hook line piece 40 hook that base portion 420 is close to this groove base portion 222 return back to this hook line Part 40 elastic prestressing in situ.

Described only bullet part 60 one end be round be delineation portion 600, one end, delineation portion 600 is vertically bent into fixed end 601, separately One end extends horizontally to be had resilient elongated rod shape and extends into pushed section 602 in ending vertical, and certain bolt 61 that plays is bolt shape State, screw rod end is locked in this through this delineation portion 600 and determines shell hole 427, and this fixed end 601 penetrates this and determines hole 428, makes this Only bullet part 60 is fixed in this hook line piece 40 and provides elastic force to this pushed section 602, and this pushed section 602 passes this perforation 429, The aperture of this perforation 429 is big, has for mobilizable space in its hole, this pushed section 602.

When described hook line piece 40 is in the original position of stroke, the line of this hook line piece 40 hooks 421 and is positioned at this guide sliding part 23 end, This hook base portion 420 is against this groove base portion 222, and suture 70 is by hooking in wire casing 423 bottom land penetrates this trunking 221 and by putting The state that wire casing 221 other end through wires hole 220 passes, stop 424 backstop of this hook line piece 40 is stopped in this seam hook 20 Go back to portion 233, and the positive elasticity in pushed section 602 that should stop bullet part 60 peaks at below the bullet stop 241 of this guide lug 24, it is provided that one Elastic prestressing, makes this hook line piece 40 lift up this stop 424 centered by this guide gip 80 and is only butted on this and places restrictions on portion 232 and be This non-return portion 233 backstop, keeps to be stably located at the home state of stroke by rollback；And when suture 70 ruptures, Again threading crosses through wires hole 220 and lead-in wire part 30, i.e. may move this hook line piece 40 and carries out unblock stroke as shown in Figure 4 Going to move back again after a and draw stroke b, this line hook 421, to this guide sliding part 23 top, is let go, at once because of the pull of return unit 50 And carry out recovery stroke c and catch on suture 70 simultaneously, and till the mobile original position returning back to stroke.

Please coordinate shown in Fig. 4 and 5, unlocking stroke a is by upwards jack-up below this pulling part 426, makes this hook line piece 40 Pivoting centered by this guide gip 80, it is mobile that the stop 424 of this hook line piece 40 places restrictions on direction a ' toward disengaging, this stop 424 Leave this and place restrictions on portion 232 scope backed out beyond this non-return portion 233, can as shown in Figure 6, user is with finger Pulling this pulling part 426, this hook line piece 40 is this external force pull, and coordinates with this guide groove 425 by this guide gip 80 This seam that is affixed on that this hook line piece 40 can be certain should be made to hook 20 surfaces slips across the guiding in portion 41 with this saddle 230, with This return unit 50 of Shi Lashen, moves to this guide sliding part 23 top, arrives this hook line piece 40 and move back the least significant end drawing stroke b, Also being the top of threading hook lineal travel, this notch 422 of this hook wire casing 423 is directed at this suture 70, can decontrol this hook line Part 40, this hook line piece 40 is this return unit 50 and is pulled slip, carries out recovery stroke c, and this suture 70 can be This line hook 421 hook is held and is entered in this hook wire casing 423 by notch 422, and is introduced by suture 70 in trunking 221, extremely The hook base portion 420 of this hook line piece 40 peaks at this groove base portion 222, makes suture 70 complete by through hook wire casing 423 bottom land and penetrates The operation in this trunking 221 and passed by trunking 221 other end through wires hole 220, reaches fast automatic threading and hooks line Action.

Meanwhile, the pushed section 602 of described only bullet part 60 is stopped to playing stop 241 through the leading slope part 240 of guide lug 24, it is provided that should Hook the strength that line piece 40 pivots centered by guide gip 80, make stop 424 get enter into the scope in this non-return portion 233 and be Placing restrictions on portion 232 and supported only, this non-return portion 233 can this stop 424 of backstop so that it is cannot rollback, reach this hook line piece 40 stable position hook the purpose of 20 in seam, the most i.e. complete the locking operation after threading hooks line, when seam hooks 20 swing, This hook line piece 40, by centrifugal forces affect, makes more stable being equipped in this non-return portion 233 and place restrictions on portion 232 of this stop 424 In the range of, when making action, degree of stability is higher.

Aforesaid this hook line portion A also can as it is shown in fig. 7, can be a perforation form place hole 423 ', for this hook line piece 40 move to just to this through wires hole 220 at this guide sliding part 23 top, this suture 70 can directly through this through wires hole 220 with Placing hole 423 ', then make this hook line piece 40 be back to this guide sliding part 23 end, this suture 70 is i.e. held into this trunking 221 In.

Claims

1. a hook line apparatus for sewing machine seam hook group, is that to have one be the swing arm that a drive shaft drives, and described swing arm is freely End is provided with a seam and hooks, and described seam hook free end is provided with a through wires hole and passes for a suture, through wires hole end hook along this seam Surface forms a trunking, and this trunking is connected this through wires hole the other end and is provided with the groove base portion of a turnover, it is characterised in that:

Described seam hooks middle section and sets a guide sliding part, and described guide sliding part one end is guide sliding part end, and the other end is guide sliding part top, And the hook being provided with a depression at this nearly hook part, guide sliding part end outer peripheral edge determines portion, one hooks line piece is slidedly arranged on this guide sliding part, should Hooking line piece top is one across portion, and in this across middle section, portion the most horizontal-extending have one prominent and there is the hook ear of perforation form, And the end of this hook line piece is provided with a hook line portion, this hook line piece is positioned at this guide sliding part end, and this suture is penetrated by this hook line portion This trunking is also passed by this through wires hole of this trunking other end；

Described hook line portion is to have a line to hook, and forms one and have the notch hook wire casing towards this guide sliding part end；

Described hook line piece is by this guide sliding part tip displacement to this guide sliding part top, and described hook line portion can at this guide sliding part top Passing for this suture, this suture may pass through this through wires hole, and this hook line piece mobile can be entered to this guide sliding part end, this suture Enter in this trunking；

One return unit, one end hooks the hook of the depression being held in this guide sliding part and determines portion, and another end hooks the hook across portion in this hook line piece Ear, to provide the base portion that hooks of this hook line piece to be close to the elastic prestressing returning back to this hook line piece original position of this groove base portion.

The hook line apparatus of a kind of sewing machine the most as claimed in claim 1 seam hook group, it is characterised in that: described hook line portion Be in one perforation form place hole.

3. the hook line apparatus of sewing machine seam hook group as claimed in claim 1, it is characterised in that: this of described seam hook is led Top, cunning portion is a saddle, and this guide sliding part is provided with certain keyhole, and this hook line piece is to form for an elongated lamellar body turnover, top Be a section be inverted U-shaped one across portion, should should extend a large-area sidewall across side, portion across portion across on this saddle, This sidewall is provided with elongated poroid guide groove in this across portion's parallel beneath, is screw-locked at this for a guide gip through this guide groove and determines keyhole, This hook line piece hooks upper mutually guiding in seam.

4. the hook line apparatus of sewing machine seam hook group as claimed in claim 1, it is characterised in that: described guide sliding part end The mutually portion that places restrictions in re-entrant angle shape and a non-return portion it is provided with bottom outer peripheral edge, and the outwardly guide lug in this guide sliding part top, should Extended into leading slope part by tip bottom guide lug, and extend bullet stop in leading slope part bottom level, the side of this hook line piece end Wall is provided with one relative to place and is perpendicular to the stop that this sidewall horizontal is stretched out, and this sidewall extends one relative to this guide sliding part top and is cased with The pulling part of gum cover, is provided with certain shell hole at this sidewall this pulling part nearly, closely determines to be provided with certain hole at shell hole, fixed away from this Being provided with a perforation at shell hole, the position of this perforation is when this hook line piece is back to the original position that this seam hooks guide sliding part end stroke, just Be directed at the bottom of this guide lug, one only bullet part one end be round be delineation portion, this one end, delineation portion is vertically bent into fixed end, separately One end extends horizontally to be had resilient elongated rod shape and extends into pushed section in ending vertical, and certain bolt that plays is bolt form, spiral shell Rod end is locked in this through this delineation portion and determines shell hole, and this fixed end penetrates this and determines hole, and this pushed section passes this perforation, and this perforation has There is the space movable in its hole for pushed section.

5. sewing machine seam hook group a hook line apparatus, be have one be one drive shaft drive swing arm, described swing arm from Being provided with a seam by end to hook, described seam hook free end is provided with a through wires hole and passes for a suture, through wires hole end hook along this seam Surface form a trunking, it is characterised in that:

Described seam hooks middle section and sets a guide sliding part, and described guide sliding part one end is guide sliding part end, and the other end is guide sliding part top, One hooks line piece is slidedly arranged on this guide sliding part, and the end of this hook line piece is provided with a hook line portion, and this hook line piece is positioned at this guide sliding part end End, this suture is penetrated this trunking by this hook line portion and is passed by this through wires hole of this trunking other end；

6. the hook line apparatus of sewing machine seam hook group as claimed in claim 5, it is characterised in that: described guide sliding part end Be additionally provided with bottom outer peripheral edge one with the portion that places restrictions in re-entrant angle shape mutually of non-return portion, described leading slope part bottom level extends bullet stop, Described hook line piece sidewall is provided with certain shell hole, closely determines to be provided with certain hole at shell hole, determines to be provided with a perforation at shell hole away from this, The position of this perforation in this hook line piece be back to this seam hook guide sliding part end stroke original position time, the bottom of this guide lug of positive alignment, One only bullet part one end be round be delineation portion, one end, described delineation portion is vertically bent into fixed end, the other end extend horizontally to tool Resilient elongated rod shape also extends into pushed section in ending vertical, and certain bolt that plays is bolt form, and screw rod end passes this delineation portion Being locked in this and determine shell hole, described fixed end penetrates this and determines hole, and this pushed section passes this perforation, and this perforation has for pushed section in its hole The space of interior activity.