JPH06146156A - Warp-sizing device - Google Patents

Abstract

PURPOSE:To provide the sizing device capable of sizing the warps of synthetic fibers and also the warps of regenerated fibers or semi-synthetic fibers. CONSTITUTION:This dipping type sizing device for sizing a warp sheet (y) by passing the warp sheet (y) through the sizing solution in a sizing tank 1 along the lower surface of a dipping roller 2 and subsequently passing the dipped warp sheet between upper and lower sizing agent-squeezing rollers 4, 3 is characterized by disposing a sizing roller-driving device 30 for rotating the lower sizing agent-squeezing roller 3 at a rotation number for imparting a sizing agent to the roller, disposing a roller 36 for adjusting the contact angle of the warp sheet (y) with the upper part of the lower sizing agent-squeezing roller 3 and a roller 39 for separating the warp sheet (y) from the lower sizing agent-squeezing roller 3 on the stopping of the travel of the warp sheet (y) in a state capable of being shunted when the warp sheet is dipped and sized. and being also used as a roller type sizing device when the upper sizing agent- squeezing roller 4 is shunted to the upper end, when the sizing roller-driving device 30 is operated and when the warp sheet (y) is brought into contact with the upper part of the lower sizing agent-squeezing roller 3 through roller 39, 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp sizing apparatus for both dipping type and roller type.

[0002]

2. Description of the Related Art A warp sizing apparatus for synthetic fibers such as polyester and nylon in a filament yarn is provided with a dipping roller and a lower squeezing roller in a sizing tank, and an upper squeezing roller on a lower squeezing roller. Is provided so as to be able to move up and down, and the lower part of the dipping roller and the lower part of the lower size squeezing roller are respectively immersed in the size liquid in the size tank, and the lower size squeezing roller is driven to rotate.
The warp sheet of synthetic fibers travels at the peripheral speed of the lower glue squeezing roller, passes through the glue liquid in the glue tank along the lower surface of the dipping roller, and is glued to the lower glue squeezing roller and the upper glue squeezing roller. The paste is passed through the space. So-called dip glue is applied.

On the other hand, a warp sizing apparatus for regenerated fibers such as rayon and cupra in filament yarn and semi-synthetic fibers such as acetate has a sizing roller provided in a sizing tank, and the lower part of the sizing roller is used as a sizing liquid in the sizing tank. It is soaked and the gluing roller is driven to rotate. The warp sheet of recycled fiber or semi-synthetic fiber is glued by contacting the upper part of a glue roller that rotates at a peripheral speed lower than its running speed. So-called roller glue is applied.

Regenerated fibers and semi-synthetic fibers are generally hydrophilic and have a very high water absorption rate, and when they are dipped and glued, they are extremely stretched, their strength is halved, and many yarn breaks occur, so they are not dipped and glued. . Synthetic fibers are generally hydrophobic and have a low water absorption rate, and when they are glued on a roller, the glue liquid does not sufficiently adhere to them, so that they are not glued on the rollers.

Therefore, a dipping-type sizing apparatus dedicated to the warp of the synthetic fiber is used, and a roller sizing apparatus dedicated to the warp of the recycled fiber or the semi-synthetic fiber is used.

[0006] The gluing device, which is both a dipping type and a roller type,
unknown.

[0007]

However, when gluing synthetic fiber warp and recycled fiber or semi-synthetic fiber warp,
Since there is no known sizing device that can be used both as a dipping type and a roller type, both the dipping type sizing device and the roller sizing device must be installed at a large cost. In addition, even if both of them are installed, in recent years, various types of sizing of filament yarn have been produced in a small amount, so that the installations of both cannot increase the operating rate. Therefore, the sizing of the filament yarn cannot be performed at low cost.

An object of the present invention is to solve the above conventional problems.

[0009]

[Observation for solving the problem] In the dipping type gluing device, the lower size squeezing roller is for dipping sizing, in which the lower part is dipped in the sizing liquid of the sizing tank so that the peripheral speed becomes the traveling speed of the warp sheet. The upper size squeezing roller is configured to be rotated at a rotational speed, and the upper size squeezing roller is provided so as to be movable up and down in order to pass the warp sheet between the lower size squeezing roller and the lower size squeezing roller. Therefore, the immersion type gluing device retracts the upper glue squeezing roller to the rising end,
When the lower size squeezing roller is rotationally driven at a rotation speed for sizing the roller that is slower than the traveling speed of the warp sheet, the lower size squeezing roller functions as a sizing roller, which is a roller sizing device.

In the dipping type gluing device, the dipping roller is provided so as to be able to move up and down so as to be retracted when the glue tank is cleaned. The dipping roller is provided so as to be movable up and down and to be movable back and forth toward the lower glue squeezing roller when the glue is squeezed with the lower glue squeezing roller. Therefore, when the immersion sizing device is a roller sizing device, if the immersion roller interferes, the immersion roller can be retracted to the ascending end or the retracting end.

That is, it was noticed that the immersion type gluing device can also be used as the roller type gluing device.

Further, a roller for adjusting the angle at which the warp sheet to be glued to the roller contacts the glue roller, and a warp sheet to be separated from the glue roller when the traveling of the warp sheet to be roller glued is stopped to prevent the occurrence of uneven glue. It was conceived to provide rollers and make these rollers retractable in order to prevent them from getting in the way during dipping and gluing.

Further, when the warp sheet is divided into upper and lower parts in order to improve the drying efficiency by hot air after gluing, a roller is provided which makes uniform the contact angle of each warp of the warp sheet to be glued with the gluing roller. In order to prevent it from getting in the way at the time of dipping and gluing, it was conceived to make it retractable.

[0014]

SUMMARY OF THE INVENTION The present invention is a warp sizing apparatus for sizing a warp sheet, wherein a dipping roller and a lower squeeze roller are provided in a sizing tank, and an upper squeeze roller is placed on the lower squeeze roller. Is provided so that it can be moved up and down, and the lower part of the dipping roller and the lower part of the lower glue squeezing roller are respectively immersed in the glue liquid in the glue tank,
The lower size squeezing roller is driven to rotate at the rotation speed for dipping and sizing, and the warp sheet runs at the peripheral speed of the lower size squeezing roller and passes through the size liquid of the sizing tank along the lower surface of the dipping roller. A dipping type gluing device for squeezing glue by passing it between a lower glue squeezing roller and an upper glue squeezing roller,
The lower squeeze roller is driven at a rotation speed for roller sizing that is slower than the traveling speed of the warp sheet. A contact angle adjusting roller that adjusts the contact angle is provided so that it can be retracted during dipping and sizing, and the warp separating roller that separates the warp sheet from the lower squeezing roller when dipping is available when the running of the warp sheet for sizing the roller is stopped , The upper size squeezing roller is retracted to the rising end, the sizing roller driving device is operated, and the warp sheet comes in contact with the upper part of the lower size squeezing roller through the warp separating roller and the contact angle adjusting roller to paste the glue. It is a warp sizing apparatus characterized in that it is configured as a type sizing apparatus.

Further, according to the present invention, in a warp gluing device for gluing a warp sheet and then dividing the warp sheet into upper and lower parts, the warp sheet glued to the upper part of the lower size squeezing roller is flattened before being divided. The above-mentioned warp sizing apparatus is characterized in that a pair of upper and lower contact angle equalizing rollers that are held in a fixed shape are provided so as to be able to retract when dipping and sizing.

[0016]

In the present invention, the contact angle adjusting roller and the warp separating roller, or these and the contact angle equalizing roller are retracted,
The lower size squeezing roller is rotated at the rotation speed for dipping and sizing, the warp sheet is run at the peripheral speed of the lower size squeezing roller, and is passed through the sizing liquid in the sizing tank along the lower surface of the dipping roller to apply sizing. Then, when the adhesive is squeezed by passing it between the lower adhesive squeezing roller and the upper adhesive squeezing roller, the dipping adhesive is applied. That is, the warp of the synthetic fiber can be glued.

The upper size squeezing roller is retracted to the rising end, the sizing roller driving device is operated, the lower size squeezing roller is rotated at the rotation speed for sizing the roller, and the warp sheet is moved to the warp separating roller and the contact angle adjusting roller. After that, when the upper side of the lower side squeezing roller is brought into contact with and glued, the roller is glued. That is,
It is possible to paste warp of recycled fiber or semi-synthetic fiber.

When the warp sheet is divided into upper and lower parts after the roller gluing, the warp sheet is brought into contact with the upper part of the lower size squeezing roller to be glued to the roller and then passed between a pair of upper and lower contact angle equalizing rollers. , Then split up and down. The warp sheet is held in a single plane between the lower size squeezing roller and the contact angle equalizing roller, and the contact angle of each warp yarn with the lower size squeezing roller is uniform.

[0019]

In the warp sizing apparatus of the present invention, both dipping sizing and roller sizing can be performed, so that both the dipping type sizing apparatus and the roller sizing apparatus need to be installed at a great expense. There is no. Further, since both synthetic fiber warp and recycled fiber or semi-synthetic fiber warp can be pasted, the operating rate can be increased. Therefore, the sizing of the filament yarn can be performed at low cost.

Further, when the warp sheet is divided into upper and lower parts after sizing, the use of the contact angle equalizing roller makes the contact angle of each warp of the warp sheet with the lower size squeezing roller uniform. The amount of warp sizing is uniform.

[0021]

Example A warp sizing machine equipped with a warp sizing apparatus of this example
As partially shown in FIG. 1, a beam creel unit, a sending unit B, a gluing device C, a dividing unit D, a hot air drying unit E, a cylinder drying unit and a winding unit are sequentially arranged.

As shown in FIG. 1, the gluing device C includes a gluing tank 1
The dipping roller 2 is provided at the front part of the dipping roller 2 so as to be movable back and forth and up and down, and the lower glue squeezing roller 3 is provided at the rear part of the sizing tank 1. The lower part of the lower glue squeezing roller 3 and the lower part of the lower glue squeezing roller 3 are respectively immersed in the sizing liquid of the sizing tank 1, and the upper glue squeezing roller 4 is brought into contact with the lower glue squeezing roller 3 so as to be movable up and down.

As shown in FIG. 2, the lifting device for the upper glue squeezing roller 4 supports the upper glue squeezing roller 4 between the tips of the left and right side plates 5, and the base ends of the both side plates 5 are connected to the machine frame (not shown). Both side plates 5 are arranged in the front-rear direction by being pin-connected to the upper glue squeezing roller 4 and mounted on the lower glue squeezing roller 3 so as to be able to move up and down.

At the lower position of each side plate 5, as shown in FIG. 2, an air cylinder 6 is vertically arranged with its base end upward.
The base end of the air cylinder 6 is pin-coupled to a machine frame (not shown), the tip of the lever 8 is pin-coupled to the tip of the piston rod 7 protruding from the tip of the air cylinder 6, and the base end of the lever 8 is not shown. The lever 8 is arranged in the front-rear direction by being pin-connected to the frame, and both ends of the connecting rod 9 are pin-connected to the central portion of the side plate 5 and the central portion of the lever 8.

When the piston rod 7 of the air cylinder 6 is raised or lowered, the upper glue squeezing roller 4 is raised or lowered. In addition, the upper glue squeezing roller 4 is connected to the lower glue squeezing roller 3
When the force for lowering the piston rod 7 of the air cylinder 6 is adjusted, the glue drawing pressure between the glue drawing rollers 3 and 4 is adjusted.

As shown in a part of FIG. 3, the back-and-forth movement of the dipping roller 2 and the lifting device are mounted so that the rack shafts 11 are vertically arranged outside the left and right side plates 10 of the machine frame so that they can be lifted and lowered. The connecting shaft 12 is hung between the upper ends of both rack shafts 11 protruding above the side plate 10 and fixed, and the upper ends of the hanging plates 13 are rotatably attached to the left and right ends of the connecting shaft 12, respectively. The immersion roller 2 is supported between the lower ends of the hanging plates 13 of the
The connection shaft 12 and both rack shafts 11 are provided so as to be able to move up and down, and are suspended below the connection shaft 12 so as to be rotatable back and forth.

On the outside of each side plate 10, a gear shaft 14 is supported in the front-rear direction, and a pinion 15 fixed to the gear shaft 14 and a rack shaft 11 are meshed with each other as shown in FIG. 10 through which the operating shaft 16 is pierced, and the operating shaft 1
A worm 17 fixed to 6 and a worm wheel 18 fixed to the gear shaft 14 are engaged with each other, and a handle 19 is attached to the end of the operation shaft 16. Operating shaft 16 with handle 19
The normal rotation or the reverse rotation causes the immersion roller 2 to move up or down.

As shown in a part in FIG. 3, the upper end of the pressing lever 20 is rotatably attached to each end of the connecting shaft 12, and the pressing lever 20 and the suspension plate 13 are fixed and integrated to press. A dogleg-shaped lever 21 is arranged at a lower position of the lever 20, a bent central portion of the doglegged lever 21 is pin-connected to the side plate 10, and an upper end of the dogleg-shaped lever 21 is pressed by the pressing lever 2.
0 in contact with the front surface of the lower end of 0, and vertically arrange the air cylinder 22 at the lower position of the dog-legged lever 21 with its base end downward.
The base end of the air cylinder 22 is pin-connected to the side plate 10, and the tip of the piston rod 23 protruding from the tip of the air cylinder 22 is pin-connected to the lower end of the dogleg-shaped lever 21.

When the piston rod 23 of the air cylinder 22 is lowered, the upper end of the doglegged lever 21 pushes the lower end of the pressing lever 20, and the dipping roller 2 rotates and comes into contact with the lower glue squeezing roller 3. When the piston rod 23 of the air cylinder 22 is raised, the upper end of the doglegged lever 21 retracts, and the immersion roller 2 rotates by its own weight to separate from the lower glue squeezing roller 3. The immersion roller 2 is brought into contact with the lower glue squeezing roller 3 and the piston rod 23 of the air cylinder 22 is abutted.
By adjusting the force for lowering, the glue drawing pressure between the dipping roller 2 and the lower glue drawing roller 3 is adjusted.

In the gluing device C, as shown in FIG. 1, the lower glue squeezing roller 3 is connected to a transmission shaft 24, and the transmission shaft 24 is connected to a line drive motor 26 via a line transmission mechanism 25. The front end and the rear end of the line transmission mechanism 25 are connected to the delivery section B and the cylinder drying section via tension adjusting devices 27 and 28.

As shown in FIG. 1, in the middle of the transmission shaft 24, there is interposed a pneumatic driving clutch 29 which is connected at the time of immersion gluing and which is opened at the time of gluing the roller.
A sizing roller drive motor 30 that is driven when sizing the roller is connected to the transmission shaft 24 between the lower squeezing roller 3 and the lower squeeze roller 3 via a one-way clutch 31 that idles during the sizing and is connected during the sizing. That is, a sizing roller driving device that drives the lower squeezing roller 3 to rotate at a rotation speed for roller sizing that is slower than the traveling speed of the warp sheet is provided so as to be operable during sizing.

As shown in FIGS. 1 and 4, on the upper front side of the immersion roller 2, the rotary shaft 32 is pierced by the left and right side plates 10 of the machine frame, and the hollow guide roller 33 is mounted on the rotary shaft 32. Is attached through a ball bearing.

As shown in FIG. 4, at the left and right ends of the rotary shaft 32, mounting members 34 are respectively projected and fixed to the rear side, and the base ends of the arms 35 are respectively attached to the rear ends of both mounting members 34. It is detachably fixed with bolts, and the contact angle adjusting roller 36 is supported between the tips of both arms 35, as shown in FIGS. 1 and 7.
A contact angle adjusting roller 36 that pushes the warp sheet y to be sizing the roller downward between the guide roller 33 and the lower squeezing roller 3.
Is provided so as to be rotatable up and down and detachable together with both arms 35.

The left and right ends of the rotary shaft 32 are shown in FIG.
, The mounting members 37 are projected and fixed to the front side, the base ends of the arms 38 are detachably fixed to the front ends of the mounting members 37 with bolts, and the warp threads are provided between the tips of the arms 38. As shown in FIGS. 1 and 8, the separating roller 39 is urged to push the warp sheet y to be glued downward between the guide roller 33 and the sending-out portion B so that the separating roller 39 can be rotated up and down. And both arms 38 are detachably provided.

As shown in FIG. 4, a lever 40 is projected and fixed to each end of the rotary shaft 32, and an air cylinder 41 is vertically arranged with the base end of the air cylinder 41 at the lower position of the tip of the lever 40. The base end of the air cylinder 41 is pin-coupled to a machine frame (not shown), and the tip of the piston rod 42 protruding from the tip of the air cylinder 41 is pin-coupled to the tip of the lever 40.

When the height of the piston rod 42 of the air cylinder 41 is adjusted during roller gluing, the height of the warp separating roller 39 increases or decreases, while the contact angle adjusting roller 36 guides the warp sheet y to the guide roller 33 and the lower glue. The amount of downward pressing between the squeezing rollers 3 increases and decreases, and the angle at which the warp sheet y contacts the upper part of the lower sizing roller 3 is adjusted.

When the traveling of the warp sheet y to which the roller sizing is stopped, as shown in FIG. 8, the piston rod 42 of the air cylinder 41 descends, the contact angle adjusting roller 36 rises, and the warp separating roller 39 descends. Then, the warp sheet y is pushed and stored between the guide roller 33 and the feeding portion B downward, and the warp sheet y after the guide roller 33 rises and is separated from the lower size squeezing roller 3.

That is, the contact angle adjusting roller 36 for adjusting the angle at which the warp sheet y to be glued with the roller contacts the upper portion of the lower size squeezing roller 3, and the warp sheet y to be glued when the traveling of the warp sheet y to be glued is stopped. Lower glue squeeze roller 3
The warp separating roller 39 for separating from each is provided so as to be retractable at the time of dipping and sizing.

On the rear side of the lower glue squeezing roller 3, as shown in FIGS. 1 and 5, support members 43 are provided so as to face each other, and two shaft holes 44 are formed on the inner surfaces of both support members 43. The contact angle equalizing rollers 45 are fitted and supported in the respective shaft holes 44 of both the support members 43, and both contact angle equalizing rollers 45 are arranged in the front and rear, and the front contact angle equalizing roller 45 is provided. And the lower end of the rear contact angle equalizing roller 45 are arranged at the same height as the upper end position of the lower glue squeezing roller 3.

As shown in FIG. 5, the upper and lower contact angle equalizing rollers 45 are respectively moved to one end side, the other end side is pulled out from the shaft hole 44, and the other end side is rotated to the outside of the support member 43. After that, it is moved to the other end side and one end side is pulled out from the shaft hole 44, so that it is removed.

That is, a pair of upper and lower contact angle equalizing rollers 45 for holding the warp sheet y, which is brought into contact with the upper portion of the lower size squeezing roller 3 and is glued, in a flat state before division, is saved when dipping and gluing. It is possible.

In the warp sizing machine equipped with the warp sizing apparatus of this example, when dipping and sizing the warp of the synthetic fiber, the contact angle adjusting roller 36, the warp separating roller 39, and the upper and lower contact angle equalizing rollers 45 are used. Remove and save. As shown in FIG. 6, the warp yarn sheet y is provided on the upper side of the guide roller 33, the lower side of the dipping roller 2, and the dipping roller 2 in the sizing apparatus C.
And the lower glue squeeze roller 3 and between the lower glue squeeze roller 3 and the upper glue squeeze roller 4 are sequentially passed. The line drive motor 26 is rotationally driven, and the lower glue squeezing roller 3 is rotated at a rotation speed for dipping and gluing through the connected pneumatic drive clutch 29.

Then, the warp sheet y runs at the peripheral speed of the lower size squeezing roller 3 and, as shown in FIG.
Is pasted through the glue solution in the glue tank 1 along the lower surface of the
The paste is sequentially passed between the dipping roller 2 and the lower glue squeezing roller 3 and between the lower glue squeezing roller 3 and the upper glue squeezing roller 4, and then the glue is squeezed, and then it is divided into upper and lower portions and dried with hot air.

When the warp of recycled fiber or semi-synthetic fiber is to be glued on the roller, as shown in FIG.
Are raised to retract and the immersion roller 2 is retracted from the lower glue squeezing roller 3 to rise and retract to contact the contact angle adjusting roller 36.
And warp separating roller 39 and upper and lower contact angle equalizing roller 4
Attach 5 respectively. As shown in FIG. 7, the warp yarn sheet y is located below the warp yarn separating roller 39, above the guide roller 33, below the contact angle adjusting roller 36, above the lower glue squeezing roller 3, as shown in FIG. It is sequentially passed between the upper and lower contact angle equalizing rollers 45. Pneumatic drive clutch 29
And the line drive motor 26 is rotationally driven, and the gluing roller drive motor 30 is rotatively driven to rotate the lower glue squeezing roller 3 through the connected one-way clutch 31 and the transmission shaft 24. To rotate.

Then, as shown in FIG. 7, the warp yarn sheet y passes through the warp separating roller 39, the guide roller 33, and the contact angle adjusting roller 36, and comes into contact with the upper portion of the lower size squeezing roller 3 to be glued to the upper and lower portions. It passes between the contact angle equalizing rollers 45, and then is divided into upper and lower parts and dried with hot air.

As shown in FIG. 7, the warp sheet y is divided into upper and lower parts after sizing, but since it is held between the lower size squeezing roller 3 and the contact angle equalizing roller 45 in one plane. The angle at which each warp comes into contact with the lower size squeezing roller 3 becomes uniform, so that the amount of glue adhered to each warp becomes uniform.

When the traveling of the warp yarn sheet y to which the roller sizing is stopped, as shown in FIG.
6 rises, the warp separating roller 39 descends, and the warp sheet y is guided by the guide roller 33 and the contact angle equalizing roller 45.
Since it rises between them and is separated from the lower size squeezing roller 3 that is rotating, unevenness in gluing on the warp sheet y is prevented.

[Brief description of drawings]

FIG. 1 is a partial schematic side view of a warp sizing machine including a warp sizing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic side view of an upper-side squeezing roller elevating / lowering device of the warp sizing apparatus of the example.

FIG. 3 is a partial schematic front view of a dipping roller front-back movement lifting device of the warp sizing apparatus of the example.

FIG. 4 is a schematic plan view of a warp separating roller, a guide roller, and a contact angle adjusting roller device of the warp sizing apparatus of the example.

FIG. 5 is a partially cutaway schematic plan view of a contact angle equalizing roller device of the warp sizing apparatus of the same example.

FIG. 6 is a partial schematic side view of a warp sizing machine equipped with the warp sizing apparatus of the same example at the time of dipping and sizing.

FIG. 7 is a partial schematic side view of the warp sizing machine equipped with the warp sizing apparatus of the same example at the time of roller sizing.

FIG. 8 is a partial schematic side view of the warp sizing machine including the warp sizing apparatus of the same example when the roller sizing is stopped.

[Explanation of symbols]

 y Warp sheet C Gluing device D Dividing part 1 Glue tank 2 Immersion roller 3 Lower glue squeezing roller 4 Upper glue squeezing roller 26 Line drive motor 30 Glue roller driving motor 36 Contact angle adjusting roller 39 Warp separating roller 45 Uniform contact angle Roller

Claims (2)

[Claims] 1. A warp gluing device for gluing a warp sheet, wherein a sizing tank is provided with a dipping roller and a lower squeezing roller, and an upper squeezing roller is provided on the lower squeezing roller so as to be able to move up and down. The lower part of the lower size squeezing roller and the lower part of the lower size squeezing roller are each immersed in the size liquid of the size sizing tank, and the lower size squeezing roller is driven to rotate at the number of rotations for dipping and sizing. Immersion type gluing device that travels at the peripheral speed, passes through the sizing liquid in the sizing tank along the lower surface of the squeeze roller to paste, and passes between the lower squeeze roller and the upper squeeze roller to squeeze the glue. And the lower squeezing roller is rotatably driven at a rotational speed for sizing the roller, which is slower than the traveling speed of the warp sheet. Touch the top of the roller A contact angle adjusting roller that adjusts the touching angle is provided so that it can be retracted when dipping and sizing, and when the traveling of the warp sheet to be glued is stopped, the warp separating roller that separates the warp sheet from the lower size squeezing roller can be retracted when dipping and sizing The upper size squeezing roller is retracted to the rising end, the sizing roller driving device is activated, and the warp sheet comes in contact with the upper part of the lower size squeezing roller through the warp separating roller and the contact angle adjusting roller to paste the A warp sizing device, which is configured as a type sizing device. 2. A warp gluing device for gluing a warp sheet and then splitting the warp sheet into upper and lower parts, which holds the warp sheet glued with the roller in contact with the upper part of a lower size squeezing roller in a plane before splitting. The warp sizing apparatus according to claim 1, wherein a pair of upper and lower contact angle equalizing rollers are provided so as to be able to be retracted when dipping and sizing.