JPH0439270A - Yarn hooking method and device thereof - Google Patents

Abstract

PURPOSE:To prevent winding of a defective part by locking a yarn end on the side up a cutting spot to a bobbin for winding after a wound yarn is drawn to cut a defective part after a yarn end is locked to the waist spool of a spindle mounted on am empty bobbin to wind it around the bobbin during hooking of a yarn to the bobbin. CONSTITUTION:A yarn 3 winding of which is completed is drawn this side by a yarn catcher 44 and cut at a part marked by (x). A yarn end 3A on the up side is sucked and held by means of an air sucker 4, an empty bobbin 2A is mounted, a yarn end is locked to a lock part 6 of a waist spool 5 of a rotating spindle 1, and pushed rightward in a diagram by means of a yarn pusher 7, and wound around the bobbin 2A by means of a traverser 8. At a point of time when a specified amount of a yarn is wound, the air sucker 4 is moved backward in a direction shown by an arrow mark a1 to draw a wound yarn 3B from a spindle 1 and cut it at a position D marked by (x). A cut yarn end on the up side is wound again.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for automatically threading multifilament or single filament thread onto a bobbin mounted on a rotating spindle, and the method. The present invention relates to a threading device used in the implementation.

[Prior Art] Figs. 16, 17, and 18 are a schematic perspective view and a schematic plan view showing the main parts of a threading device for explaining a conventional threading method, and the arrow r in the figure shows the main parts of a threading device. When threading the thread onto the empty bobbin 2A attached to the outer periphery of the spindle l rotating in the direction of As shown by the imaginary line in FIG. 17, the air sucker 4 is moved to the front of the truncated conical waist spool 5 screwed to the tip of the spindle 1 and kept on standby.

In this state, when the spindle 1 and the empty bobbin 2A reach a predetermined rotation speed, the air sucker 4 is advanced in the direction of arrow a in FIG. 17, and the waist spool is moved as shown by the solid line in FIG. By entering the hollow portion of the waist spool 5, the thread 3 held by the air sucker 4 is introduced into the notched groove 6 formed in the peripheral wall of the waist spool 5 and is locked therein.

Among them, the upper side of the yarn portion that is locked in the notch groove 6 is driven to the rear end (11f) of the empty bobbin 2A by the yarn pusher 7 moving in the direction of the arrow f in FIG. The receiver is passed, and the reciprocating movement of the traverser 8 along the rotational axis direction starts winding the thread 3 onto the bobbin 2A.

Subsequently, in the state shown in FIG. 18 in which the air sucker 4 is retreated in the direction of arrow a1, the thread 3 between the bobbin 2A and the air sucker 4 is cut using scissors 9.

[Problems to be Solved by the Invention] In the conventional threading method as described above, when threading the empty bobbin 2A, the waist spool 5 fixed to the spindle 1 rotates at high speed; The speed at which the thread 3 is introduced into the notch groove 6 of the waist spool 5 through the air sucker 4 is very slow, so the thread 3 cannot be introduced smoothly into the notch groove 6. In most cases, the thread 3 hits the corner of the entrance of the notched groove 6 or rubs against the entrance peripheral edge 5a of the waist spool 5.

Here, if the yarn to be wound is a multifilament made by bundling a large number of filaments, the above-mentioned notch groove 6
Due to the contact with the corner of the filament, bulges occur in the filament, and some of the filaments that were not introduced into the notch #I6 at one time enter the notch groove 6 after one or several rotations, which causes the burlap to occur. As a result, partial thread breakage and tangles occur. In addition, regardless of whether the yarn is multifilament or single filament, the inlet peripheral edge 5 of the waist spool 5 as described above
There was also a drawback that the threads were damaged due to friction with a.

Furthermore, since the winding start end yarn after cutting separates from the notch groove 6 of the waist spool 5 and becomes a free end, there is no possibility that it will get caught in the yarn wound around the bobbin 2 during rotation. As a result, there is an inconvenience that the user using the rolled up cheese is unable to secure the winding start end yarn required for tail processing.

This invention was made in view of the above-mentioned circumstances, and it is possible to remove defective parts such as loose threads, partial thread breaks, and scratches that sometimes occur in the thread hook, and to wind only normal thread onto the bobbin. It is an object of the present invention to provide a threading method and device capable of securing winding start end thread of the length necessary for processing.

[Means for Solving the Problems] In order to achieve the above object, the thread threading method according to the present invention includes a step of cutting the terminal end of the thread after winding, and a step of cutting the end thread on the upper side of the cut point. The upper side of the end thread is held as the starting end for winding, and the held end thread is locked in the locking part of the waist spool provided at the tip of the rotating spindle with an empty bobbin attached. A process of winding a part of the wound thread onto a bobbin, a process of drawing out a part of the wound thread along with the end thread to the outside in the axial direction of the spindle, and a process of cutting the above part of the drawn thread in the middle, and cutting the above part of the thread on the upper side of the cut point. The method comprises the steps of gripping the yarn, and winding the gripped portion around the waist spool by moving the gripped portion to a position facing the radially outer side of the waist spool.

Further, the thread threading device according to the present invention for carrying out the above-mentioned thread threading method includes a factory mechanism for removing the bobbin after winding the thread from the spindle and mounting an empty bobbin on the spindle, A cutting mechanism that cuts the terminal end of the yarn that has been cut, a holding mechanism that holds the end yarn on the upper side of the cutting point as the starting end of the subsequent winding, a drive mechanism that moves this holding mechanism, and a drive mechanism that controls this drive mechanism. locking means for locking the held end yarn in a locking portion of a waist spool provided at the tip of a rotating spindle with an empty bobbin attached thereto by moving the holding mechanism toward the spindle; a first winding means for driving a yarn driving mechanism to drive the upper side of the locked end yarn to the rear end side of the spindle and winding the upper side around the bobbin; and controlling the driving mechanism. a pulling means for pulling out a part of the thread wound around the bobbin from the bobbin together with the end thread by moving the holding mechanism in a direction away from the spindle;
A cutting mechanism that cuts the above-mentioned part of the pulled out thread midway, a grasping mechanism that grasps the upper side of the cut point, and this grasping mechanism is moved to a position facing the radially outer side of the waist spool. , a second winding means for winding the upper side of the gripped portion around the waist spool.

[Operation] According to the threading method of the present invention, when winding onto one bobbin is completed, the terminal end of the thread is cut, and the end thread on the upper side of the cut point is then wound for subsequent winding. The process up to this point in which the upper end of the end thread is wound around the bobbin by holding it as the starting end of the end thread and then locking this held end thread to the waist spool at the tip of the rotating spindle is the same as the conventional process. Since they are the same, as mentioned above,
Defects such as loose threads, partial thread breaks, and scratches occur on the end threads.

Therefore, a part of the thread wound around the bobbin is then pulled out in the axial direction of the spindle along with the end thread having the defect as described above, and the part of the thread that has been pulled out is cut in the middle. The above-mentioned threading can eliminate defects that sometimes occur.

Next, by gripping the thread above the cut point and moving the gripped part to a position facing the radially outer side of the waist spool, the thread part above the gripping point is attached to the waist spool. To prevent the end yarn from becoming loose after winding and removing a defective part, and to secure a winding start end yarn having a length necessary for tail treatment after winding.

Further, according to the threading device according to the present invention as set forth in claim 2, a doffing operation (bobbin exchange) in which the bobbin after winding the thread is removed from the spindle and an empty bobbin is attached to the spindle is performed. The series of operations related to threading can be carried out fully automatically and continuously, such as automatically carrying out the threading operation, including the threading operation to remove the defective part, as described above. can be executed.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. In this embodiment, the same components as those of the conventional example shown in FIGS. 16 to 18 will be described with the same reference numerals.

14 and 15 are a schematic front view and a schematic right side view showing the entire automatic doffing machine, which is roughly divided into a winding device 10 and a doffing machine body 11 shown in FIG. .

The winding device 10 moves from the screen frame 12 to the doffing machine main body 11.
Spindles 1 that protrude to the side and are driven and rotated around a horizontal axis are arranged in multiple rows in multiple stages vertically and horizontally. A bobbin 2 made of a paper tube is attached to the outer periphery of the spindle 1 so as to rotate integrally with the bobbin 2, and the thread 3 is inserted into the dancer part 13 from above. The material is wound onto the bobbin 2 via a traverser 8 (FIG. 16) and a contact roller (not shown). Since this winding device 10 is conventionally well known, detailed description thereof will be omitted.

The doffing machine main body 11 is installed on a truck 16 that is movably mounted on rails 14 via wheels 15. As shown in FIG. 1, this doffing machine body 11 includes a switchboard 17, an empty bobbin magazine 18, and a
An empty bobbin loader 20 loads the empty bobbins 2A, which are pushed out one by one through the pusher 19, onto the spindle 1 on the winding device 10 side, and loads the full bobbins 2B, on which the yarn 3 has been wound, from the spindle l. It consists of a full-tube unloader 21 for extracting full tubes, and a yarn handling unit 22, which is the main part of the present invention.

The empty bobbin loader 20 has a halved cylindrical bobbin holder 23 (FIG. 15) that receives the empty bobbin 2A pushed out by the pusher 19. This bobbin holder 23 is driven by a cylinder 24. horizontal axis 25
As shown by the solid line in Fig. 14, the movable frame 26 swings around the frame 26, so that the holder takes the empty bobbin 2A that is being pushed out and the axis of the empty bobbin 2A is in the first upright position. It is configured to be able to freely switch to a second posture located on the axial extension of the spindle 1 on the winding device 10 side. Further, the bobbin holder 23 is configured to be movable in and out of the winding device 10 by a cylinder 27 and a slide guide 28 shown in FIG. By moving the receiver toward the winding device IO side, the receiver inserts and attaches the empty bobbin 2A to the spindle l.

The full-tube pobbin unloader 21 has a bobbin chuck 29 that can be opened and closed to clamp the end of the full-tube pobbin 2B that remains attached to the spindle 1 after winding is completed. This bobbin chuck 29 is configured to be movable in and out of the winding device 10 via a cylinder 30, and is configured to be freely rotatable 90 degrees around a horizontal axis 32 via another cylinder 31. There is. Further, the entire unloader block 35 including each of the above-mentioned components is configured to be able to rise and fall freely via an elevating cylinder 33 and an elevating guide 34.

According to such a full tube unloader 21, the 14th
The entire unloader block 35 is lowered from the position and posture shown in the figure until the bobbin chuck 29 coincides with the axial extension of the spindle l, and the bobbin chuck 29 is advanced toward the winding device 10 and closed. The ends of the full-tube pobbin 2B are thereby clamped. Subsequently, the bobbin chuck 29 is moved back toward the doffing machine main body 11 to remove the full bobbin 2B from the spindle l.

After the full tube pobbin 2B is extracted, it rises to the position shown in FIG. , the entire block 35 is lowered to place the full tube bin 2B on a conveying device (not shown).

The above full bobbin unloader 21 and the empty bobbin loader 20 constitute a factory mechanism.

The yarn handling unit 22 is constructed as shown in FIG. 1, which is an enlarged view of the main part of the first drawing, and FIG. 2, which is a plan view thereof.

The unit frame 36 in FIG. 1 is configured to be able to move up and down via a cylinder 37 and a guide 38, and to move back and forth relative to the winding device IO via an air cylinder 40 and a guide 41. This unit frame 3
At the bottom of the thread 6, there are scissors 42 that are opened and closed via an electromagnetic solenoid 39 as a cutting mechanism for cutting the end of the thread 3 that has been wound. A yarn catcher 44 that moves in and out through a cylinder 43 so as to pull it toward the side is attached.

The scissors 42 are attached to the upper part of the unit frame 36.
An air pipe 4 is used as a holding mechanism to hold the end yarn 3A on the upper side of the cut point C by
Due to the ejector effect caused by blowing the compressed air sent through the nozzle 5 into the nozzle 46, the end yarn 3A
An air sucker 4 is provided that can suck and hold the liquid into the tip opening 4a. this air soccer 4
is configured to be able to freely reciprocate along the rail 48 via the cylinder 47 in the direction of arrow a-a1 shown in FIG. A guide pipe 49 that guides the movement of the air sucker 4 is fixed to the unit frame 36.

A bracket 50 shown in FIG. 1 is installed upright on the unit frame 36, and a thread driving mechanism is provided at the upper end of the bracket 50 for driving the upper side of the end thread 3A into the rear end side of the spindle 1. It can be freely moved back and forth in the direction of arrow f-f1 in FIG. 1 via the air cylinder 51.
A pusher 7 is provided. Scissors 9, which are opened and closed via an electromagnetic solenoid 52, are attached to the rear side surface of the bracket 50 as a cutting mechanism, and the scissors 9 move the air sucker 4 in the direction of arrow a1 to cut the ends of the ends. A part of the thread pulled out from the pobbin 2 along with the thread 3A is cut midway.

Furthermore, a cover plate 53 is provided near the front end of the unit frame 36 to open and close the tip opening 49a of the fixed guide pipe 49 that guides the movement of the air sucker 4. This cover plate 53 is configured to be able to move up and down via an air cylinder 54, and to move back and forth via another cylinder 55, and has a grip for grasping the terminal 3A on the upper side of the point to be cut by the scissors 9. It constitutes a mechanism 58.

Note that 56 in FIGS. 1 and 2 is a speed sensor that detects the rotational speed of the spindle 1, and the air cylinder 57
It is configured to be able to freely move in and out in the direction of arrow b-b1 in FIG. 1 via. This speed sensor 56 obtains rotational speed data of the spindle l by optically detecting the thread locking notch groove 6 of the truncated conical waist spool 5 screwed to the tip of the spindle 1. With what you get,
When the spindle l reaches a predetermined rotational speed, the entire yarn handling unit 22 is moved to the winding device 10 side and the thread hooking operation is performed.

FIG. 3 is a schematic perspective view of the main parts of the above-mentioned yarn handling unit 22 taken out for easy understanding. Further, the threading operation by the yarn handling unit 22 is computer-controlled according to a preset program. That is, in FIG. 3, a controller 61 using a computer incorporates a locking means for operating the thread hook, first and second winding means, a drawing means, a thread cutting means, and a gripping means. .

The operation of thread hooking by each of these means will be explained in detail later, but the outline thereof is as follows.

That is, the locking means controls the cylinder 47 via a control valve (not shown) to move the air sucker 4 toward the spindle l side indicated by arrow a, thereby removing the end yarn held by the air sucker 4. Spindle 3A
The notch groove 6 of the waist spool 5 is engaged. The first winding is performed by controlling the construction cylinder 51 via a control valve (not shown) to advance the yarn bushing 7 in the direction of the arrow f, so that the end of the yarn locked in the notch groove 6 is The upper end of the thread 3A is driven toward the rear end of the spindle 1, and the upper end is wound around the pobbin 2. The drawing means controls the cylinder 47 via a control valve, also not shown.

By moving the air sucker 4 in the direction indicated by arrow &1 away from the spindle wire, a part of the yarn wound around the pobbin 2 is pulled out from the pobbin 2 along with the end yarn 3A.
The system cutting means controls the electromagnetic lens 52 to cut the part of the drawn thread with scissors 9, and the gripping means controls the cylinder 54 through a control valve (not shown).
55 so that the upper side of the cut point is gripped by the cover plate 53 and the tip opening 49a of the guide pipe 49. Furthermore, the second winding means controls the cylinders 37 and 40 via a control valve (not shown) to raise the gripping mechanism 58 together with the unit frame 36, and to raise the gripping mechanism 58 along the radially outer side of the waist spool 5. by moving it to a position opposite to.

Put the thread part on the lower side of the gripped part into the waist spool 5.
A controller (not shown) having means for winding the second winding is provided.

Next, among the operations of the automatic doffing machine configured as described above, the threading operation by the yarn handling unit 22 will be explained in detail in chronological order according to the schematic diagram of the main parts.

(1) At the same time as the air sucker 4 and yarn catcher 44 shown in FIG. 1 rise from the standby position shown by solid lines and move forward, a cradle (not shown) is opened, and the rolled cheese shown in FIG. 3D is separated from a contact roller (not shown).

(2) The yarn 3 that has been wound is placed in the yarn catcher 44.
The scissors 42 cut the thread C at the point C shown by the x mark in FIG. Ru.

(3) Stop the rotation of the spindle 1 and the pobbin 2, that is, the cheese 3D, and remove the full tube pobbin 2B from the spindle l using the previously described full tube pobbin unloader 21 (Fig. 14, $15). Then, the empty bobbin 2A is inserted and mounted on the spindle I using the empty bobbin loader 20 described above.

(4) When the cradle is closed and the rotation of the spindle l and the empty bobbin 2A is started, the air sucker 4 sucking and holding the end yarn 3A is moved in front of the waist spool 5 of the spindle as shown in FIG. I was moved to the station and waited.

(5) The rotational speeds of the spindle 1 and the empty bobbin 2A are detected by the speed sensor 56 (Figs. 1 and 2), and when the rotational speed reaches a predetermined value, the air sucker 4 moves in the direction of arrow a. When the end yarn 3A is moved forward and its tip enters into the hollow portion of the waist spool 5, the end yarn 3A is introduced into the notch groove 6 of the waist spool 5 and is locked, as shown in FIG. At the same time, the yarn busher 7 drives the upper end of the end yarn 3A that is locked in the notch groove 6 to the rear end (right side) f of the empty bobbin 2A, and the traverser 8 winds it around the empty bobbin 2A.

(6) When the winding of about one cycle has progressed over almost the entire length of the empty bobbin 2A, the air sucker 4 is
The yarn is moved backward in one direction, and as shown in FIG. 7, a part of the yarn 3B wound around the empty bobbin 2A is released while ballooning, and is moved to the axially outer side al of the spindle l together with the end yarn 3A. drawn out.

(7) A gripping mechanism 58 using the tip opening 49a of the guide pipe 49 and the lid 53 to hold the part 3B of the thread pulled out by closing the tip opening 4a of the air sucker 4 with the lid plate 53.
After the drawn-out thread portion 3B is prevented from being taken into the spindle 1 side by grasping it through the A portion closer to the end thread 3A is cut with scissors 9. The thread portion 3Bl on the upper side of this cutting point is the tip opening 49a of the guide pipe 49.
In this way, the end thread 3A below the cutting point is discarded, and the end thread 3A is unbalanced or damaged when it is locked in the notch groove 6. There is no problem even if you do.

(8) By raising the entire yarn handling unit 22 slightly as shown in FIG. 9 and moving it forward to a position facing the radially outer side of the waist spool 5,
The thread portion 3B1 gripped by the gripping mechanism 58 is wound around the outer periphery of the waist spool 5. In this way, the thread portion 3Bl at the winding start end is not locked in the notch groove 6 but is wound around the outer periphery of the waist spool 5.
There is no need to cause looseness in this thread portion 3B1. Also, since the thread portion 3B1 is wound around the outer periphery of the waist spool 5 and held, it will not be accidentally caught on the bobbin Z side. It is possible to secure starting yarn of the length required for processing.

Through each of the above operations, the threading operation with a good thread finish is completed, and thereafter, by the rotation of the spindle 1 and bobbin 2 and the reciprocating movement of the traverser 8, the thread is wound around the outer circumference of the bobbin 2 for a preset number of calendars. This is done to obtain cheese 3D as shown in FIG.

The length of the starting end thread portion 3Bl of the cheese 3D pulled out from the spindle 1 in the direction of arrow P by the full bobbin unloader 21 is about 200 mm, and the starting end thread portion 3Bl is , 11th
As shown in the figure, it is accommodated in the hollow part of the full bobbin 2B.

In addition, the above-mentioned thread hooking is performed by the speed sensor 56 at the operation timing.
By using the speed data obtained by , it is possible to reliably perform the above-mentioned threading even if the speed at which the rotation of the spindle 1 starts is uneven.

Furthermore, as shown in FIG. 12, by pasting a small piece of tape 59 on a part of the outer circumferential surface of the waist spool 5 fixed to the tip of the spindle 1, the tape can be wrapped around the outer circumference of the waist spool 5. By increasing the holding force of the thread portion 3B1, it is possible to prevent unexpected unraveling due to centrifugal force of one rotation. Particularly, when using a small piece of tape 59 that has a large denier loop-shaped yarn 59B fluffed on the surface of an adhesive tape base material 59A, as shown in FIG. The holding power of 3B1 can be further strengthened.

Furthermore, instead of using the small piece 59 of the tape, water or the like is sprinkled on the outer periphery of the waist spool 5 to wrap the yarn around the thread portion 3B1.
may have a holding power.

[Effects of the Invention] As described above, according to the threading method of the present invention, the end thread on the upper side of the cut point at the end of the thread after winding is held as the starting end of the next winding, and this holding After the end thread is locked in the locking part of the waist spool and the upper side is wound around the bobbin, a part of the wound thread is pulled out along with the end thread to the outside in the axial direction of the spindle. By cutting part of the pulled out thread midway, defects that occur when it is locked to the locking part of the waist spool, such as loose filaments in the case of multifilament, partial yarn breakage, and tangles are removed. In the case of a single filament, defects such as scratches can be removed and only normal yarn can be wound onto a hobbin.

In addition, by wrapping the end thread after the defective part has been removed around the outer periphery of the waist spool, it is possible to prevent the end thread from becoming loose due to swinging around, and to prevent it from getting caught in the thread being wound around the bobbin. , it is possible to secure a winding start end yarn of a length necessary for tail processing etc. when using the wound cheese.

Further, according to the threading device of the present invention, as described above, the threading is not only performed to wind the thread, including thread finishing and subsequent threading to remove defects that sometimes occur, but also to the bobbin after winding is completed. It is possible to perform a series of operations such as exchange (doffing work) fully automatically and continuously, and it is possible to improve efficiency and save labor in threading work.

[Brief explanation of drawings]

1 and 2 are a side view and a plan view of a yarn handling unit, which is the main part of a threading device according to an embodiment of the present invention, and FIG. 3 is a side view and a plan view of a yarn handling unit shown in FIGS. 1 and 2. Figures 4 to 9 are schematic side views of the main parts of the thread threading method according to the present invention, and are schematic side views of the main parts of the thread threading method according to the present invention.
The figure is a schematic vertical side view showing the cheese after winding.
Fig. 1 is a schematic vertical sectional side view showing the situation of the starting end after winding is completed, Fig. 12 is a side view of the main part showing another embodiment of the present invention, and Fig. 13 is an enlarged view of the main part of Fig. 12. Longitudinal sectional view, 1st
Figures 4 and 15 are a schematic front view and a schematic right side view showing the entire automatic doffing machine, and Figure 16 is a W of a conventional threading device.
14 is a schematic perspective view, and FIGS. 17 and 18 are schematic side views of main parts of a conventional thread hook to explain the operation thereof. 1...Spindle, 2.2A, 2B...Bobbin,
3... Thread, 3A... End thread, 3B... Part of the thread to be pulled out, 4... Air sucker (holding mechanism), 5...
... West spool, 6 ... Notch groove (locking part),
7... Yarn pusher (thread driving mechanism), 9.42
... Scissors (cutting mechanism), 47... Cylinder (driver side 58... Gripping mechanism.

Claims (2)

[Claims] (1) A method of winding thread onto a bobbin attached to the outer periphery of a rotating spindle, replacing the bobbin after winding with an empty bobbin, and automatically threading the empty bobbin. A process of cutting off the end of the thread that has been taken up, a process of holding the end thread on the upper side of the cut point as the starting end of the subsequent winding, and a process of holding the held end thread on a rotating spindle with an empty bobbin attached. The process of winding the upper side of the end thread around the bobbin by locking it in the locking part of the waist spool provided at the tip of the spool, and pulling out part of the wound thread along with the end thread outward in the axial direction of the spindle. a step of cutting the part of the pulled out thread midway and grasping the thread on the upper side of the cut point; and moving the grasped part to a position facing the radially outer side of the waist spool. and a step of winding the thread around the waist spool. (2) A factory mechanism that removes the bobbin that has finished winding the thread from the spindle and attaches an empty bobbin to the spindle, a cutting mechanism that cuts the end of the thread that has finished winding, and a machine that cuts the end of the thread that has been wound. A holding mechanism that holds the side end yarn as the starting end of the subsequent winding; a drive mechanism that moves this holding mechanism; and a drive mechanism that moves the holding mechanism toward the spindle by controlling this drive mechanism. a locking means for locking the end yarn with a locking portion of a waist spool provided at the tip of a rotating spindle with an empty bobbin attached; A first winding means for driving the upper side toward the rear end of the spindle and winding the upper side around the bobbin; controlling the drive mechanism to move the holding mechanism in a direction away from the spindle; a pulling means for pulling out a part of the wound thread together with the end thread from the bobbin; a cutting mechanism for cutting the part of the drawn thread in the middle; a gripping mechanism for gripping the upper side of the cut point; and second winding means for winding the lower side of the gripped portion around the waist spool by moving the mechanism to a position facing the radially outer side of the waist spool.