CN211141089U

CN211141089U - Pay-off rack

Info

Publication number: CN211141089U
Application number: CN201921815164.4U
Authority: CN
Inventors: 王重真
Original assignee: Kunshan Jinyuan Optoelectronic Technology Co ltd
Current assignee: Kunshan Jinyuan Optoelectronic Technology Co ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-07-31
Anticipated expiration: 2029-10-25

Abstract

The utility model discloses a pay off rack, its characterized in that: the pay-off device comprises a pay-off shaft, a wire guide mechanism and a tension adjusting mechanism; the wire guiding mechanism comprises a connecting plate, a middle wire guiding wheel and a right wire guiding wheel, the middle wire guiding wheel and the right wire guiding wheel are respectively and rotatably arranged on the rear side of the middle part and the rear side of the right end of the connecting plate, and the middle part of the left side of the connecting plate is rotatably connected with the middle part of the connecting piece through a rotating shaft; the tension adjusting mechanism comprises an adjusting rod and an adjusting wheel, the top of the adjusting wheel is connected with the top of the adjusting rod in a rotating mode, the adjusting rod is arranged above the left side of the middle wire guide wheel, the bottom of the adjusting rod is installed on the connecting piece through an eccentric wheel in a rotating mode, the outer edge face of the bottom of the eccentric wheel supports against the top face of the left side of the connecting plate, and the eccentric wheel is arranged above the left side of the rotating shaft. The utility model provides high unwrapping wire quality and stability.

Description

Pay-off rack

Technical Field

The utility model relates to a copper line production and processing equipment especially relates to a pay off rack.

Background

In the production and processing process of the copper wire, a paying-off mechanism is generally adopted for paying-off processing. The active pay-off mode is to use a motor to drive a pay-off shaft to rotate for pay-off, and is suitable for pay-off of a large-disc copper wire. The drawing and paying-off are suitable for paying-off the small-coil copper wire. Wherein, among the traction unwrapping wire mode, all directly pull out the copper line and pull, in this kind of structure, tension regulation is unstable, and the copper line is loose easily and leads to the copper line to tie a knot, leads to the unwrapping wire stability inadequately, influences the unwrapping wire quality.

Disclosure of Invention

The utility model aims at providing a pay off rack through using this structure, has improved unwrapping wire quality and stability.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a pay-off stand comprises a stand and a plurality of sets of pay-off devices arranged on the stand, wherein the plurality of sets of pay-off devices are arranged on the stand at intervals from front to back, each pay-off device comprises a pay-off shaft, a wire guide mechanism and a tension adjusting mechanism, the wire guide mechanisms and the tension adjusting mechanisms are arranged at the top of the stand through connecting pieces, and the pay-off shafts are arranged on the stand right below the connecting pieces;

the connecting plate can be pulled by the tension spring to rotate around the rotating shaft anticlockwise, the adjusting rod and the adjusting wheel are pushed by the eccentric wheel to rotate anticlockwise,

the wire guiding mechanism comprises a connecting plate, a middle wire guiding wheel and a right wire guiding wheel, the middle wire guiding wheel is rotatably arranged on the rear side of the middle part of the connecting plate, the right wire guiding wheel is rotatably arranged on the rear side of the right end of the connecting plate, and the middle part of the left side of the connecting plate is rotatably connected with the middle part of the connecting piece through a rotating shaft;

the tension adjusting mechanism comprises an adjusting rod and an adjusting wheel, the top of the adjusting wheel is connected with the top of the adjusting rod in a rotating mode, the adjusting rod is arranged above the left side of the middle wire guide wheel, the bottom of the adjusting rod is installed on the connecting piece through an eccentric wheel in a rotating mode, the outer edge face of the bottom of the eccentric wheel supports against the top face of the left side of the connecting plate, and the eccentric wheel is arranged above the left side of the rotating shaft.

In the technical scheme, the connecting piece comprises a vertical pipe and two groups of inclined plates, the left side of the vertical pipe is connected with the right side of the top of the rack through a U-shaped frame, a cavity is formed in the top of the vertical pipe, the two groups of inclined plates are arranged in parallel, the bottoms of the two groups of inclined plates are respectively connected with the front side and the rear side of the top surface of the vertical pipe, and the inclined plates are arranged leftwards from bottom to top in an inclined mode.

In the above technical solution, an auxiliary plate is disposed at the rear end of the left side of the connecting plate, the connecting plate and the auxiliary plate are connected via a left connecting shaft and a right connecting shaft, the left connecting shaft is connected to the left side of the connecting plate and the left side of the auxiliary plate, two ends of the right connecting shaft are connected to the right side of the auxiliary plate and the connecting plate, and the rotating shaft is disposed between the left connecting shaft and the right connecting shaft; the left side of the connecting plate and the auxiliary plate are arranged between the two groups of inclined plates, the rotating shaft penetrates through the connecting plate and the auxiliary plate to be connected with the bottoms of the two groups of inclined plates, the connecting plate and the auxiliary plate are rotatably connected with the rotating shaft, and the right connecting shaft is arranged right above the cavity; the eccentric wheels are rotatably arranged above the two groups of inclined plates.

Among the above-mentioned technical scheme, the bottom of standpipe is equipped with a screw, the screw with the cavity is linked together, the spiro union has an adjusting bolt in the screw, adjusting bolt's top set up in the cavity, the cover is equipped with an extension spring on the adjusting bolt, the top of extension spring with the right side is even the axle articulates continuously, the bottom of extension spring with adjusting bolt's outer fringe face welding links to each other, the extension spring pulling the connecting plate centers on the pivot is clockwise to be rotated, makes the bottom surface of connecting plate is close to the right side top surface setting of standpipe, and promotes eccentric wheel and regulation pole anticlockwise rotation make the regulation pole is set up left by supreme slope down.

In the technical scheme, a through groove is formed in the right side face of the vertical pipe, a detection rod is arranged on the front side of the bottom of the tension spring and penetrates through the through groove to be arranged outside the right side of the vertical pipe.

In the technical scheme, a roller is further arranged between the left connecting shaft and the rotating shaft, two ends of the roller are rotatably connected with the connecting plate and the auxiliary plate, and the bottom outer edge surface of the eccentric wheel abuts against the top outer edge surface of the roller.

Among the above-mentioned technical scheme, the paying off shaft set up in the frame of middle part wire wheel and right side wire wheel below, be equipped with an annular groove on the left side outer fringe face of paying off shaft, be equipped with a diaphragm in the frame of paying off shaft left side top, the diaphragm is close to the top left side setting of paying off shaft.

In the technical scheme, the left connecting shaft is arranged right above the U-shaped frame; the top of the limiting pull rope is connected with the left connecting shaft, and the bottom of the limiting pull rope sequentially penetrates through the front sides of the U-shaped frame and the transverse plate, bypasses the bottom of the annular groove and is connected with the rear side of the transverse plate.

In the technical scheme, the lower part of the limiting pull rope is wound below the annular groove, the front side of the transverse plate is provided with a first screw hole, the rear side of the transverse plate is provided with a second screw hole, a hollow rod is screwed in the first screw hole, a through hole is formed in the hollow rod, and the limiting pull rope penetrates through the through hole of the hollow rod; and a second bolt is screwed in the second screw hole, and the end part of the limiting pull rope is connected with the bottom of the second bolt.

In the technical scheme, the adjusting device is further provided with a blocking rod, two ends of the blocking rod are connected with the tops of the two groups of inclined plates, and the connecting plate pushes the eccentric wheel to rotate anticlockwise under the clockwise rotation state, so that the left side of the bottom of the adjusting rod is abutted against the right side face of the blocking rod.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

1. the utility model discloses in adopt the unwrapping wire axle to place the unwrapping wire to the product, utilize middle part wire wheel and right side wire wheel among the wire mechanism to carry out the wire to the copper line, recycle regulating wheel and regulating lever and carry out tensile regulation to the product unwrapping wire in-process, in this process, when tension changes, because the existence of extension spring and eccentric wheel, the connecting plate can promote eccentric wheel anticlockwise rotation in clockwise rotation process, when the eccentric wheel rotates clockwise, can promote connecting plate anticlockwise rotation, realize tensile dual regulation and synchronous control, guarantee unwrapping wire stability and quality;

2. the utility model discloses in through the setting of spacing stay cord, can carry on spacingly to connecting plate clockwise pivoted angle, guarantee the stability of tension regulation.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a schematic perspective view of FIG. 1;

fig. 4 is a schematic structural diagram of a pay-off device according to an embodiment of the present invention;

FIG. 5 is a right side view of FIG. 4;

FIG. 6 is a schematic view of a portion of A-A of FIG. 5 in cross-section;

FIG. 7 is a schematic perspective view of FIG. 4;

FIG. 8 is an enlarged view of a portion of the joint of FIG. 7;

fig. 9 is a schematic perspective view of a wire guiding mechanism and a tension adjusting mechanism according to a first embodiment of the present invention.

Wherein: 1. a frame; 2. a pay-off device; 3. a pay-off shaft; 4. a connecting member; 5. a connecting plate; 6. a middle wire guide wheel; 7. a right wire guide wheel; 8. a rotating shaft; 9. adjusting a rod; 10. an adjustment wheel; 11. an eccentric wheel; 12. a copper wire; 13. a vertical tube; 14. a sloping plate; 15. a U-shaped frame; 16. a cavity; 17. an auxiliary plate; 18. a left side connecting shaft; 19. a right side connecting shaft; 20. adjusting the bolt; 21. a tension spring; 22. a through groove; 23. a detection lever; 24. a roller; 25. an annular groove; 26. a transverse plate; 27. a limiting pull rope; 28. a hollow shaft; 29. a second bolt; 30. a gear lever.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

the first embodiment is as follows: referring to fig. 1 to 9, a pay-off stand comprises a frame 1 and a plurality of sets of pay-off devices 2 arranged on the frame, wherein the plurality of sets of pay-off devices are arranged on the frame from front to back at intervals, each pay-off device comprises a pay-off shaft 3, a wire guide mechanism and a tension adjusting mechanism, the wire guide mechanism and the tension adjusting mechanism are arranged at the top of the frame through a connecting piece 4, and the pay-off shafts are arranged on the frame right below the connecting pieces;

the wire guiding mechanism comprises a connecting plate 5, a middle wire guiding wheel 6 and a right wire guiding wheel 7, the middle wire guiding wheel is rotatably mounted at the rear side of the middle part of the connecting plate, the right wire guiding wheel is rotatably mounted at the rear side of the right end of the connecting plate, and the middle part of the left side of the connecting plate 5 is rotatably connected with the middle part of the connecting piece 4 through a rotating shaft 8;

the tension adjusting mechanism comprises an adjusting rod 9 and an adjusting wheel 10, the top of the adjusting wheel is connected with the top of the adjusting rod in a rotating mode, the adjusting rod is arranged above the left side of the middle wire guide wheel, the bottom of the adjusting rod is rotatably arranged on the connecting piece through an eccentric wheel 11, the bottom outer edge face of the eccentric wheel supports against the top face of the left side of the connecting plate, and the eccentric wheel is arranged above the left side of the rotating shaft.

In this embodiment, all be equipped with annular wire casing on the outer fringe face of middle part wire wheel, right side wire wheel and regulating wheel, carry out the wire and spacing to the copper line, prevent that the wire breaks away from and the off normal. When the practical use, will directly overlap on the paying out shaft around the spool that has copper line 12, the spool can rotate on the paying out shaft, and the copper line is pulled out from the spool, walks around the top of middle part wire wheel from the left side of middle part wire wheel earlier, penetrates the below of right side wire wheel from the left side bottom of right side wire wheel again, winds the left side of regulating wheel left from the top of right side wire wheel again, pulls out right from the top of regulating wheel. Wherein, the eccentric wheel rotates with the connecting piece through the installation axle to be connected, the installation axle sets up the below at the eccentric wheel axis, in this in-process, because the existence of eccentric wheel, the contact of the left side top surface of eccentric wheel and connecting plate, at the tension grow, also be the traction force grow or when traction speed accelerates, can stimulate the regulating wheel and adjust the pole and pass through the eccentric wheel clockwise rotation, because the clockwise rotation of eccentric wheel, the eccentric wheel can extrude the connecting plate, can push down the left side of connecting plate, make the connecting plate around pivot anticlockwise rotation, the right side that makes the connecting plate is close to each other with the top of adjusting the pole, shorten the removal length of copper line, guarantee the tension of unwrapping.

Referring to fig. 1 to 9, the connecting member includes a vertical pipe 13 and two sets of inclined plates 14, the left side of the vertical pipe 13 is connected to the right side of the top of the rack through a U-shaped frame 15, a cavity 16 is formed in the top of the vertical pipe 13, the two sets of inclined plates are arranged in parallel, the bottoms of the two sets of inclined plates are respectively connected to the front side and the rear side of the top of the vertical pipe, and the inclined plates are inclined from bottom to top to left.

An auxiliary plate 17 is arranged at the rear end of the left side of the connecting plate 5, the connecting plate and the auxiliary plate are connected through a left connecting shaft 18 and a right connecting shaft 19, the left connecting shaft is connected with the left side of the connecting plate and the left side of the auxiliary plate, two ends of the right connecting shaft are connected with the right side of the auxiliary plate and the connecting plate, and the rotating shaft is arranged between the left connecting shaft and the right connecting shaft; the left side of the connecting plate and the auxiliary plate are arranged between the two groups of inclined plates, the rotating shaft penetrates through the connecting plate and the auxiliary plate to be connected with the bottoms of the two groups of inclined plates, the connecting plate and the auxiliary plate are rotatably connected with the rotating shaft, and the right connecting shaft is arranged right above the cavity; the eccentric wheels are rotatably arranged above the two groups of inclined plates.

The bottom of standpipe 13 is equipped with a screw, the screw with the cavity is linked together, the spiro union has an adjusting bolt 20 in the screw, adjusting bolt's top set up in the cavity, the last cover of adjusting bolt is equipped with an extension spring 21, the top of extension spring with the right side links the axle and articulates continuously, the bottom of extension spring with adjusting bolt's outer fringe face welding links to each other, the extension spring pulling the connecting plate centers on the pivot clockwise turning makes the bottom surface of connecting plate is close to the right side top surface setting of standpipe, and promotes eccentric wheel and regulation pole anticlockwise rotation make the regulation pole is set up left by supreme slope down.

In this embodiment, adopt the setting of extension spring, under normal conditions like this, the extension spring can stimulate the connecting plate and rotate around the pivot is clockwise, will promote the eccentric wheel and adjust pole anticlockwise rotation through the left side of connecting plate like this, makes the top of adjusting the pole and the right side of connecting plate keep away from each other, increases the unwrapping wire distance of copper line, adjusts the tension of unwrapping wire, can adopt the extension spring to prescribe a limit to tensile regulation.

Referring to fig. 6 to 8, a through groove 22 is formed in the right side surface of the vertical pipe 13, the through groove is communicated with the cavity, a detection rod 23 is arranged on the front side of the bottom of the tension spring, and the detection rod penetrates through the through groove and is arranged outside the right side of the vertical pipe.

In this embodiment, the adjusting bolt is connected with the bottom of the tension spring, so that the longer the distance between the bottom of the tension spring and the right connecting shaft is, the larger the tension force of the tension spring is, the shorter the distance is, and the smaller the tension force of the tension spring is, so that the tension force can be adjusted by adjusting the distance between the top of the adjusting bolt and the right connecting shaft. In order to guarantee that the adjustment range of the tension is adjusted, the adjustment stability is guaranteed, and the position of the detection rod, namely the position of the distance between the bottoms of the tension springs, can be observed through the detection rod and the through groove when the position of the adjusting bolt is adjusted through the detection rod and the through groove. Wherein, can set up the pulling force scale on the right flank of standpipe, the pulling force scale sets up the side that leads to the groove, and operating personnel can just know the pulling force value of extension spring this moment through the position to that a set of pulling force scale through the measuring pole like this, is convenient for adjust the pulling force of extension spring, and the stability and the quality of tension regulation are guaranteed to tensile regulation scope promptly also.

Referring to fig. 1 to 9, a roller 24 is further disposed between the left connecting shaft 18 and the rotating shaft 8, two ends of the roller are rotatably connected to the connecting plate and the auxiliary plate, and a bottom outer edge surface of the eccentric wheel abuts against a top outer edge surface of the roller. The arrangement of the roller wheel is adopted, so that sliding friction between the eccentric wheel and the connecting plate is prevented, the roller wheel rotates along with the eccentric wheel when the eccentric wheel rotates, sliding friction is modified into rolling friction, friction force is reduced, the stability of tension adjustment and the reaction speed of adjustment are guaranteed, and meanwhile, noise generated by sliding friction can be reduced.

Referring to fig. 1-7, the paying-off shaft is arranged on the machine frame below the middle wire guide wheel and the right wire guide wheel, an annular groove 25 is arranged on the outer edge surface of the left side of the paying-off shaft 3, a transverse plate 26 is arranged on the machine frame above the left side of the paying-off shaft, and the transverse plate is arranged close to the left side of the top of the paying-off shaft.

In this embodiment, since the plurality of sets of paying-off devices are disposed on the rack, and each set of paying-off shaft needs to be sleeved with a bobbin wound with copper wires, and the bobbin wound with copper wires has a larger diameter, so as to prevent mutual interference, the interval between adjacent paying-off devices needs to be set larger, and therefore, only a smaller number of paying-off devices can be disposed on the rack, such that the upper and lower positions of the paying-off shafts in adjacent paying-off devices are staggered, for example, the paying-off shaft of the left paying-off device is disposed below, the paying-off shafts of the right sets of paying-off devices are gradually disposed to the upper right, taking 4 sets of paying-off devices sequentially disposed from front to back as an example, the paying-off shaft of the frontmost side is disposed at the bottommost of the rack, the paying-off shaft of the second set is disposed above the rear side of the first set of paying-off shafts, the paying-off shaft of the, the fourth group of paying-off shafts are arranged above the rear side of the third group of paying-off shafts and are gradually close to the top of the rack, so that adjacent bobbins do not interfere with each other in a paying-off process, more groups of paying-off devices can be arranged on the rack, and the cost is lower.

Referring to fig. 1 to 8, the left connecting shaft 18 is disposed right above the U-shaped frame; and a limiting pull rope 27 is further arranged, the top of the limiting pull rope is connected with the left connecting shaft, and the bottom of the limiting pull rope sequentially penetrates through the front sides of the U-shaped frame and the transverse plate, bypasses the bottom of the annular groove and is connected with the rear side of the transverse plate.

Wherein, because of the existence of extension spring, the extension spring can give the decurrent pulling force in right side of connecting plate, it rotates clockwise around the pivot to drive the connecting plate, the right side bottom that gives the connecting plate supports the dynamics above the standpipe, tensile regulation just so not fine regulation, adopt the setting of spacing stay cord, drive the connecting plate at the extension spring and enclose when revolving clockwise the rotation of pivot like this, when rotating a certain position, because the left side rebound of connecting plate, spacing stay cord is taut straight, the extension spring can't continue to stimulate the connecting plate clockwise, just so can carry on spacingly to the turned angle of connecting plate, guarantee that tensile accommodation can adjust.

Referring to fig. 1 to 7, the lower part of the limiting pull rope is wound below the annular groove, a first screw hole is formed in the front side of the transverse plate, a second screw hole is formed in the rear side of the transverse plate, a hollow rod 28 is screwed in the first screw hole, a through hole is formed in the hollow rod, and the limiting pull rope penetrates through the through hole of the hollow rod; a second bolt 29 is screwed in the second screw hole, and the end part of the limiting pull rope is connected with the bottom of the second bolt.

The annular groove is walked around to the bottom of restricting rope, can guarantee like this that the position of restricting rope can not the off normal, simultaneously, adopts the second bolt to be connected with the bottom of spacing stay cord, can adjust the top position of spacing stay cord like this, also just cooperates with the extension spring and adjusts tensile accommodation, guarantees unwrapping wire quality and stability.

Referring to fig. 1 to 7, a blocking rod 30 is further provided, two ends of the blocking rod are connected with the tops of the two groups of inclined plates, and the connecting plate pushes the eccentric wheel to rotate anticlockwise under the clockwise rotation state, so that the left side of the bottom of the adjusting rod is abutted against the right side of the blocking rod. By adopting the arrangement of the gear lever, the eccentric wheel can be prevented from rotating excessively anticlockwise, the rotation of the adjusting wheel is ensured to have certain angle limitation, and the stability of tension adjustment is ensured.

Claims

1. The utility model provides a pay off rack which characterized in that: the pay-off device comprises a pay-off shaft, a wire guide mechanism and a tension adjusting mechanism, wherein the wire guide mechanism and the tension adjusting mechanism are installed on the top of the rack through a connecting piece, and the pay-off shaft is installed on the rack right below the connecting piece;

2. The pay-off stand of claim 1, wherein: the connecting piece includes standpipe and two sets of swash plates, the left side of standpipe through U type frame with frame top right side links to each other, the top of standpipe is equipped with a cavity, two sets of swash plate parallel arrangement each other, two sets of the bottom of swash plate respectively with standpipe top front side and rear side link to each other, the swash plate sets up left by lower supreme slope.

3. The pay-off stand of claim 2, wherein: an auxiliary plate is arranged at the rear end of the left side of the connecting plate, the connecting plate and the auxiliary plate are connected through a left connecting shaft and a right connecting shaft, the left connecting shaft is connected with the left side of the connecting plate and the left side of the auxiliary plate, two ends of the right connecting shaft are connected with the right side of the auxiliary plate and the connecting plate, and the rotating shaft is arranged between the left connecting shaft and the right connecting shaft; the left side of the connecting plate and the auxiliary plate are arranged between the two groups of inclined plates, the rotating shaft penetrates through the connecting plate and the auxiliary plate to be connected with the bottoms of the two groups of inclined plates, the connecting plate and the auxiliary plate are rotatably connected with the rotating shaft, and the right connecting shaft is arranged right above the cavity; the eccentric wheels are rotatably arranged above the two groups of inclined plates.

4. The pay-off stand of claim 3, wherein: the bottom of standpipe is equipped with a screw, the screw with the cavity is linked together, threaded connection has an adjusting bolt in the screw, adjusting bolt's top set up in the cavity, the last cover of adjusting bolt is equipped with an extension spring, the top of extension spring with the right side links the axle and articulates and links to each other, the bottom of extension spring with adjusting bolt's outer fringe face welding links to each other, the extension spring pulling the connecting plate centers on the pivot clockwise turning makes the bottom surface of connecting plate is close to the right side top surface setting of standpipe, and promotes eccentric wheel and regulation pole anticlockwise rotation make the regulation pole is set up left by supreme slope down.

5. The pay-off stand of claim 4, wherein: a through groove is formed in the right side face of the vertical pipe, a detection rod is arranged on the front side of the bottom of the tension spring, and the detection rod penetrates through the through groove and is arranged outside the right side of the vertical pipe.

6. The pay-off stand of claim 3, wherein: and a roller is further arranged between the left connecting shaft and the rotating shaft, two ends of the roller are rotatably connected with the connecting plate and the auxiliary plate, and the bottom outer edge surface of the eccentric wheel is abutted against the top outer edge surface of the roller.

7. The pay-off stand of claim 3, wherein: the pay-off shaft set up in the frame of middle part wire wheel and right side wire wheel below, be equipped with an annular groove on the left side outer fringe face of pay-off shaft, be equipped with a diaphragm in the frame of pay-off shaft left side top, the diaphragm is close to the top left side setting of pay-off shaft.

8. The payoff stand of claim 7, wherein: the left connecting shaft is arranged right above the U-shaped frame; the top of the limiting pull rope is connected with the left connecting shaft, and the bottom of the limiting pull rope sequentially penetrates through the front sides of the U-shaped frame and the transverse plate, bypasses the bottom of the annular groove and is connected with the rear side of the transverse plate.

9. The payoff stand of claim 8, wherein: the lower part of the limiting pull rope is wound below the annular groove, a first screw hole is formed in the front side of the transverse plate, a second screw hole is formed in the rear side of the transverse plate, a hollow rod is screwed in the first screw hole, a through hole is formed in the hollow rod, and the limiting pull rope penetrates through the through hole of the hollow rod; and a second bolt is screwed in the second screw hole, and the end part of the limiting pull rope is connected with the bottom of the second bolt.

10. The pay-off stand of claim 4, wherein: the two ends of the blocking rod are connected with the tops of the two groups of inclined plates, and the connecting plate pushes the eccentric wheel to rotate anticlockwise under the clockwise rotation state, so that the left side of the bottom of the adjusting rod is abutted against the right side face of the blocking rod.