JPS624160A - Sheet wind-up shaft - Google Patents

Abstract

PURPOSE:To facilitate the assembly of a sheet wind-up shaft which wind up thereonto or unwind therefrom a sheet in association with a roller rotated in a bevel groove, and to manufacture the same at a low cost, and to prevent sector shape pieces from scattering during the assembly, by surrounding the roller with a split ring. CONSTITUTION:When a support shaft S is rotated in the winding direction, a roller 3 is moved toward a shallow section 2a of a bevel groove 2 together with a holder 6, and projects from the bevel groove 2 due to the tension of a sheet band. A split slot 7 is enlarged to allow the outer periphery of a ring 8 to wedge into the inner periphery of a cylindrical core C or a winding section so that a sheet band is wound up. After completion of winding, when the roller 3 is rotated in the direction in which the roller 3 rolls toward a deep section 2b of the bevel groove, the ring 8 moves radially inward due to the resilient contracting force of the ring 8 itself, and separates from the inner periphery of the cylindrical core, etc. Thereby, it is possible to eliminate the annular connection of sector pieces which are liable to scatter, and therefore it is possible to aim at reducing labor, to manufacture the sheet wind-up shaft and to prevent the sector shape pieces from scattering. Further, it is possible to obtain an effect equivalent to that using the sector shape pieces.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sheet winding shaft for winding up or unwinding a sheet band such as paper, plastic film, metal foil or thin plate.

(Prior art) A plurality of circumferentially inclined grooves with inclined bottoms are formed on the outer periphery of the shaft at intervals in the circumferential direction, and within each inclined groove, rolling elements can be transferred in the longitudinal direction of the inclined grooves. and a plurality of sector-shaped pieces are disposed adjacently to surround the rolling element, and the plurality of sector-shaped pieces are held movably outward in the radial direction by an expandable holding member, and the sector-shaped pieces are The sheet band to be wound is directly wound once or several times around the outer periphery of a shaft made up of
The shaft is rotated in a direction in which the rolling elements roll toward the shallow part in the inclined groove, so that the rolling elements gradually protrude outward from the inclined groove, thereby moving each fan-shaped piece radially outward and forming a sheet strip. The present applicant has proposed a sheet band winding drive shaft which is fitted into the winding part of the cylinder or the inner periphery of the cylinder core so that it can be rotated integrally, and which performs winding of the sheet band. 11953
I proposed it in the issue.

(Problem to be solved by the invention) The sheet band winding drive shaft described in (g) integrally rotates the winding portion of the sheet band wound directly around its outer periphery or the cylindrical core, thereby winding the sheet band. There is no particular problem in carrying out this process, but since it is necessary to arrange a plurality of sector-shaped pieces adjacently outside the rolling element to surround it, processing and assembly operations are time-consuming.

In other words, a fan-shaped piece must be processed through a process in which the material is turned into a ring shape to the required dimensions, and then the ring is accurately divided into equal parts in the radial direction at extremely narrow cutting intervals. In order to accurately fix the ring or fan-shaped divided pieces to a high speed steel or the like in a cutting position so as to be strong and not deformed, a great deal of attention is required by the operator. Further, it is also necessary to process a portion of the fan-shaped piece in which the holding member is housed.

Moreover, each processed fan-shaped piece must be placed around the outer periphery of the shaft, and a contractible holding member must be stored in a storage area formed on the fan-shaped piece. For example, using piano wire as the holding member, When storing it in the groove formed on the side of the piece, there is a risk that some of the piano wire may come off the groove of the fan-shaped piece or the fan-shaped piece may fall off until all the fan-shaped pieces are held, so the assembly work is difficult. It is troublesome, and in cases where the holding member is glued to the fan-shaped piece, the gluing work must be done carefully so that the adhesion does not come off later. When spring steel is used, it is either superior in terms of durability or difficult to process.

(Means for Solving the Problems) Therefore, the present invention is characterized in that the outside of the rolling element is surrounded by an annular ring having a split at one location.

(Function) Therefore, according to the present invention, the rolling elements that roll toward the shallow part in the inclined groove of the rotation support and gradually protrude from the groove push the inner periphery of the expandable annular ring by the tenth part to form an annular shape. The ring is expanded and bitten into the inner periphery of the cylindrical core on the outer periphery of the annular ring or the inner periphery of the winding portion of the sheet band that is wrapped once or several times around the outer periphery of the annular ring.

(Embodiment) FIGS. 1 to 4 show a first embodiment of the present invention. S is detachably supported between a pair of frames and arms of the winding machine,
A well-known support shaft (drive shaft) rotationally driven through a gear or chain wheel fixed at one end, A is removably inserted onto the drive shaft S with a set screw l, and the outer circumference is spaced apart in the circumferential direction. Slope 1+1t2 where the bottom is sloped while maintaining
The rotary support has a large cylinder, and each of the inclined grooves 2 has a roller 3 disposed parallel to the axis of the support shaft and movable in the longitudinal direction of the groove along the bottom surface of the inclined groove. It is accommodated. A' is a rotary support which is removably inserted onto the drive shaft S so as to face the rotary support A. Therefore, the mutual spacing between the rotary supports A and A' can be adjusted as appropriate by releasing the fixation of the upper female screws 1 and moving the rotary supports A and A' in the axial direction on the drive shaft S. It should be noted that the above-mentioned rotary support tool does not have an inclined groove or the like on its outer periphery, and only supports the inner periphery of the cylinder core C or the like in its width. However, the support AA' may be a support having an inclined groove or the like that is paired with the support A, that is, a rotation support that can perform the function of fixing the cylinder core.

The rotary supports A and A' shown in L consist of a shaft part 4 that supports the inner periphery of a cylinder core, etc., and a flange part 5 that contacts the end surface of the cylinder core, etc., and the set screw l has an inclined groove in the flange part 5. 2 are formed at six equal intervals on the outer periphery of the shaft portion 4 of the support A. The inclined groove 2 has a bottom that gradually becomes deeper from a shallow part 2a at one end to a deep part 2b at the other end in the circumferential direction of the support A. It may be formed by selectively removing a part of the surface in the circumferential direction by cutting or the like.

Note that the bottom surface of the inclined groove 2 is preferably a flat surface, but it may be curved somewhat in the middle or in the middle, or may be bent in a plurality of steps.

Further, each slope vIJ2 is preferably equally spaced, or may not be equally spaced. Furthermore, the roller 3 is
It is sufficient to roll on the bottom surface of the inclined groove 2 in the longitudinal direction of the groove,
They do not necessarily need to roll on the same circumferential line.

A retainer 6 of the roller 3, which is partially accommodated in the inclined groove 2, is fitted onto the outer periphery of the shaft portion 4, and an annular ring 8 having a split 7 at one place is fitted outside the retainer 6. It surrounds the retainer 6. The cage 6 has a pocket 6' for holding each roller 3, and a pocket 6' for holding each roller 3.
The same number of rollers 3 are provided at equal intervals in the circumferential direction, and when each roller 3 is located on the shallow part 2a of the slanted groove, it passes through the pocket 6' and protrudes to the maximum from the outer periphery of the retainer 6, and passes through the slanted groove to the deep part 2b.
The amount of protrusion from the outer periphery of the retainer is gradually reduced as the retainer is transferred towards the outer circumference of the retainer. The annular ring 8 is located at the shallow portion 2 of the roller 3.
The inner circumference is pushed outward in the radial direction by rolling toward a, thereby performing an expansion operation. Therefore, the interval between the splits 7 of the annular ring 8 is at its maximum when the roller 3 is located on the shallow part 2a of the inclination Mw4. It becomes wide and becomes narrowest when located above the deep part zb. The annular ring 8 can also be contracted by its own elasticity, or in order to ensure its contraction operation, a circumferential groove is formed on the outer periphery of the annular ring 8, and an expandable elastic groove is formed in the outer circumference of the annular ring 8. A holding member may be fitted, and examples of this elastic holding member include a strong annular band made of elastomer, a piano wire with both ends cut off and rolled up.

However, if the annular ring 8 is made of a material with a strong contractile force as in the embodiment described later, the rotation of the support A is stopped and the contractile force of the annular ring 8 moves the roller 3 into the deep part of the inclined groove 2. It is possible to forcefully return it to 2b and automatically release the fixation to the cylinder core or the like. Furthermore, a permanent magnet may be embedded in the deep part 2b of the inclined groove 2 to help the roller 3 return to the depth 2b and to prevent the roller from falling off during assembly.

The annular ring 8 and the retainer 6 are prevented from moving in the axial direction by the collar 5 and an annular stopper l opening that fits onto the other end of the shaft 4 and is prevented from being removed by a C-shaped lip 9. blocked.

When winding a sheet band using this rotary drive shaft, normally, as shown in FIG. I support it, but
The leading end of the sheet band to be wound is wound once or several times around the annular ring 8 and the outside of the shaft portion 4 of the support A', and the wound state is fixed with adhesive, adhesive tape, etc., and the sheet is wound. You may make a round, also 1! A belt or a group of rollers surround the outer periphery of the annular ring 8, etc., and these are used to secure the tip of the sheet band to the annular ring 8. Depending on the material of the sheet band, it is also possible to directly wrap it around the outer periphery of the shaft portion 4 of the support A'.

When using the cylinder core C as shown in Fig. 1, after fitting the cylinder core C into the supports A and A', attach each end of the support shaft S between the pair of arms of the winder, and Attach it to the outer periphery of the cylinder core C at the tip with adhesive tape or the like. In addition, in order to make a single winding portion or to directly wind the sheet band, each end of the support shaft S is attached between the arms. Then, in order to wind up the sheet band, the support shaft S is rotated clockwise in FIG. 3. As a result, supports A and A' start rotating, but the shaft portion 4 of support A
The roller 3, which was located on the deep part zb of the inclined groove 2, moves along with the retainer 6 to the shallow part of the inclined groove 2 due to the friction between the annular ring 8 and the inclined groove 2 caused by the tension of the sheet band. 2a, and largely protrudes from the inclined groove through the pocket 6'. Then, the annular ring 8 surrounding the outside of the cage 6 also moves in the counter-rotational direction together with the cage 6, and rolls in the slope 142 toward the shallow part 2a as described above and leaves the slope groove 2. The split 7 is pushed radially outward by the protruding roller 3.
Expand it and insert it into the outer cylindrical core C and the inner periphery of the winding part,
Thereafter, the cylinder core C and the like are rotated together with the rotary support, and the sheet band is wound around the outer periphery of the cylinder core.

In this case, as shown in the figure, the annular ring 8 having the cylinder core and the winding portion on the outer periphery bites into the inner periphery of the cylinder core, etc., and the roller 3 that pushes the annular ring 8 radially outward has a shallow inclined groove width. It is located near part 2a. Note that the outer diameter of the annular ring 8 when the roller 3 is located on the shallow part 2a of the inclined groove is set to be larger by, for example, 10 mm in diameter than the outer diameter when it is located on the deep part zb. For example, even if the cylinder core is larger than the outer diameter of the annular ring by less than 10 seconds when the roller is located in the deep part, it can be supported concentrically with the support and rotated smoothly. becomes possible.

When the sheet band has been wrapped around the outer periphery of the tube core, etc. to the required length or 9 times, stop the rotation, remove the support shaft S from between the arms, grasp the end of the support shaft, and move the sheet band and the tube core etc. to the roller 3. The annular ring 8 is initially rotated together with the cylinder core etc. to roll the roller toward the deep part 2b of the inclined groove, and the roller When it leaves the shallow part 2a and the amount of protrusion from the inclined groove 2 decreases, it moves inward in the radial direction by its own elastic contraction force and separates from the inner periphery of the cylinder core or the like. Therefore, all you have to do is remove the support from the support shaft and pull out the support shaft from the cylinder core, etc., and since this support only has a length that locally supports the inner periphery of the cylinder core, etc., it is not necessary to wind it. The weight of the entire shaft can be reduced.

Further, if the support interval of the cylinder core or the like changes, it is only necessary to replace the support shaft S. The operation method for unwinding the sheet band using this sheet winding shaft is the same as the winding operation in the main points such as the expansion and contraction operation of the annular ring, so a description thereof will be omitted.

FIG. 5 shows a second embodiment of the invention. In this embodiment, two narrow annular rings 8,
This embodiment is different from the first embodiment in that, instead of the support A', an annular ring 8 is provided on the outer periphery and a support consisting of only the shaft portion 4 is used. Therefore, if the cylinder core C is attached and removed from the support A side, there is no need to remove the support A from the support shaft (drive shaft) S. The roller 3 accommodated in the roller 3 and the retainer 6 for holding the roller may be provided in common to the two annular rings 8, or may be provided individually.

6 to 8 show a third embodiment of the present invention, and a support shaft (drive shaft) S of this embodiment is shown.

Each of them is movable in the axial direction, and the tip thereof is inserted into an axial hollow part formed in the support A, and the support A is supported by engaging with the key 11. However, the support shaft S and the support A may be fixed with bolts or the like.

Four inclined grooves 2 are formed on the outer periphery of the shaft portion 4 of the support A. The inclined groove 2 is formed by cutting across the circumferential surface of the shaft portion 4 from one side to the other in the circumferential direction, and has a deep part 2b at the center in the circumferential direction and a shallow part 2a at both ends. It has become.

Therefore, the roller 3 rolls toward the shallow portion 2a even when the support A rotates in either the left or right direction, and pushes the annular ring 8 outward in the radial direction. The stop plate IO is removably attached to the shaft portion 4 with a bolt 12. The annular ring 8 of this embodiment has downward stepped portions 13. at both ends of the inner periphery.
13, the spacing of which corresponds to the length and width of the rollers 3. Further, the pocket 6' of the retainer 6 is open at one end, and the stepped portion 13 may be only one end wide.

According to this embodiment, by moving the support shaft S in the axial direction,
The cylinder core can be attached and detached simply by adjusting the interval between the supports A and A.

9 to 11 show a fourth embodiment of the present invention. In this embodiment, the support A with the annular ring 8 and the support A' without the annular ring 8 are fitted into both ends of the cylinder core C in advance, and then the tapered holes are formed in the supports A and A'. 14, a support shaft (drive shaft) whose tip shape matches the shape of the hole 14 above.
The tip part 15 of S is inserted and supported by pinching. Therefore, the driving force of the support shaft S is transmitted to the supports A and A' by the frictional force generated between the fitting surfaces of the tip 15 of the support shaft and the hole 14. In addition to the above, if a key such as that shown in the third embodiment is used, the driving force can be transmitted more reliably.

According to this embodiment, a support shaft S and a support A.

In addition to being easy to attach and detach from A', if supports having various outer diameters are prepared, it is possible to easily accommodate cylinder cores having different inner diameters.

Note that the rolling elements of the present invention are not limited to the cylindrical rollers in the first to third embodiments, but may be spherical.

Further, the retainer is not necessarily necessary, and may be omitted by providing that function to the annular ring, or may be omitted altogether.

In both the fourth embodiment and the fifth embodiment shown in FIGS. 12 and 13, the rolling elements are comprised of balls 16. A groove 17 having a semicircular cross section is provided on the inner periphery of the annular ring 8, into which the upper half of the ball 16 is fitted, and in the fourth embodiment, a protrusion 18, 18 for positioning the ball within the groove. is fixed by welding or the like, and the annular ring 8 also serves as a retainer, so that the retainer is omitted. On the other hand, in the fifth embodiment, the projection provided in the groove of the fourth embodiment is also omitted, and the retainer is also eliminated. Furthermore, these embodiments are not limited to the fact that the split 7 of the annular ring 8 is in the radial direction, but even if it is inclined with respect to the radial direction as shown in FIG. This indicates that the ball 16 may be inclined with respect to the direction, and that a stopper 19 may be provided at the shallow portion 2a of the inclined groove 2 to prevent the ball 16 from escaping from the inclined groove. Note that when a stronger contractile force of the annular ring 8 is required, a plate-shaped rubber hunt 20 is fitted to the outer periphery of the annular ring 8 as an elastic holding member as in the fourth embodiment, or as in the fifth embodiment. C-rings 21 made of rolled piano wire may be fitted in parallel to each other, and the splits 11' of each C-ring may be arranged in different directions in the circumferential direction. Of course, in addition to such rubber bands and C-rings, a plurality of metal arc-shaped pieces connected in an annular shape and normally biased to a reduced diameter state by a spring or the like can be used as an elastic holding member.
It is also possible to adjust the contraction force of the annular ring.

FIG. 14 shows a sixth embodiment of the present invention, in which one support shaft (
This invention relates to a support method when supporting a plurality of cylinder cores C by a drive shaft S. That is, in this example.

Two supports A of the first embodiment are extrapolated onto the elongated support shaft S so as to form a pair, with the support tool ^1 of the second embodiment interposed therebetween. The support tool A is inserted into the left end of the right cylinder core C1 and the right end of the left cylinder core C21, and commonly supports the cylinder cores C, C2. According to this embodiment, by appropriately combining the supports, it becomes possible to wind up a plurality of sheet bands around the wooden support shaft. In addition.

It is also possible to replace all the supports with the support A1 of the second embodiment.

FIG. 15 shows a seventh embodiment of the present invention. In this embodiment, supports A and A' are freely rotatably attached to a non-driven central support shaft S'. 24, gear 2
Rotation is driven by transmitting the driving force via 5.

Reference numeral 26 denotes a central cylinder which is slidably fitted to the central axis S' and supports the supports A and A' on its outer periphery in a freely rotatable manner, and has one end formed in the winding shaft support mechanism 27. is clamped by. Note that the rolling elements, inclined grooves, etc. other than those described above are the same as in the first embodiment. According to this embodiment, since the central shaft itself is not driven, processing such as precision finishing of the journal etc. is not necessary, and processing such as cutting a commercially available steel bar to the required size is sufficient.

FIG. 16 shows still another embodiment of the present invention.

The sheet winding shaft of the present invention is applied to a cylinder core support portion of a sheet winding machine.

In a sheet winding machine in which the cylinder core for sheet winding is supported and driven by inserting a winding shaft into only the hollow portions at both ends of the cylinder core, and the sheet is wound at the same time, the sheet roll is supported by one worker himself or herself. There are a wide variety of materials, from those that are so heavy that they can be transported by hand, to those that are extremely heavy and cannot be transported manually at all, such as sheet rolls that are wound up in a winding process close to the film forming process. Conventionally, the winding shaft in the core support section of a winding machine that supports and winds a very heavy sheet roll in the above-mentioned manner uses a center cone-shaped shaft with a key on its outer periphery. It is difficult for the operator to match the keys between the cylinder core and the winding shaft. In addition, if the key on the outer circumference of the center cone is biased by a spring and can be moved in the axial direction of the winding shaft, and the key groove at the end of the cylinder core engages with the key on the center cone, the cylinder core and the winding shaft are locked. A shock occurs at the moment of engagement, which may not only affect the sheet tension, but also easily damage a part of the key. There is also a type in which so-called lock rollers are held in a plurality of circumferentially inclined grooves provided on the outer periphery of the first winding shaft so that they can be moved freely, and the cylinder core is fixed by the wedge action of the rollers. In this case, when removing the winding shaft from the cylinder core, it is necessary to rotate the sheet roll and the winding shaft relative to each other to disengage the roller from the inner circumference of the cylinder core, which is extremely tightly engaged. The above operation is particularly difficult when winding up heavy sheet rolls. Furthermore, in the case of the above type, the contact area between the roller and the inner periphery of the cylinder core is small, and the roller surface is easily damaged, so it is necessary to increase the length of the winding shaft. In addition, as mentioned earlier, a winding shaft is provided with a row crawler on the outer periphery of the winding shaft, and around the row crawler, fan-shaped pieces obtained by dividing a cylinder into a plurality of parts are joined together in a cylindrical shape with an elastic member, so that the winding shaft can be expanded and contracted in the radial direction. In this case, when the winding shaft is inserted into and removed from the cylinder core, if the winding shaft is moved in the axial direction, force in the axial direction is applied to only some of the fan-shaped pieces, which tends to cause damage to the joints of the fan-shaped pieces.

Therefore, this embodiment relates to a cylinder core support part (sheet winding shaft) proposed to solve the above problem.
The support shaft S' is a hollow shaft, and is supported slidably in the axial direction by the turret arm of the winding section of the winding machine or the tip of the support stand 27' shown in the figure. A piston 29a that moves back and forth inside a cylinder 29 fixed to the tip of the support base 27' is fixed. Therefore, the hollow shaft S' is moved in the axial direction by reciprocating the piston 29a. At the tip of the hollow shaft S', there is a rotary part that freely rotates with respect to the support shaft via a radial bearing and a thrust bearing, and the above-mentioned eighth part.
A shaft portion 4 of a rotating support having an inclined groove 2, a flange portion 5, etc. as shown in the figure is supported. And roller 3
, the retainer 6 and the annular ring 8 have the same shape as shown in FIG. The hollow transmission shaft 30 is fixed concentrically to the shaft part 4 by bolts 31a and 31b, and an annular groove is provided on the end surface of the flange part 5, and the retainer 6 is inserted into the groove. The difference is that a portion of the ring is fitted in a rotatable manner, and that the annular ring 8 is made of a highly elastic material.

The hollow transmission shaft 30 is loosely fitted into the hollow portion of the hollow shaft S'. Further, a keyway is provided in the inner periphery of the hollow part of the hollow transmission shaft 30, and the other end of the drive shaft S, one end of which is rotatably supported by the bearing part 32 on the rear wall of the cylinder 29, extends in the axial direction. It is placed in a movable manner. The hollow transmission shaft 30 receives a driving force transmitted from a transmission mechanism (gear) 33 attached to the other end of the drive shaft S through a sliding key 4 that engages with a keyway of the drive shaft S and the hollow transmission shaft. is transmitted to the shaft portion 4 to drive it rotationally. Therefore, in the case of this embodiment, the hollow shaft S' itself is not rotationally driven. On the other hand, as described above, fluid pressure is supplied to the front chamber or the rear chamber of the cylinder 29 to drive the piston 29a. This allows the hollow shaft S' and the shaft portion 4 to move forward and backward in the axial direction. Since the cylinder 29 is penetrated by the drive shaft S, it has an inner cylinder 29b into which the drive shaft S is fitted. Note that the roller 3 rolls during sheet winding and the like, and the annular ring 8 performs an expanding operation, which is the same as in the previous embodiment. However, in this embodiment, since the annular ring 8 is made of a material with high elasticity (strong contraction force), when releasing the fixation to the cylinder core C, There is no particular need to rotate it relative to the winding shaft.

On the other hand, in this case, the winding shaft supporting the other end of the cylinder core C is slidably supported in the axial direction by the turret arm or the tip of the support base in the same manner as the hollow support shaft S', and is attached to the fluid pressure cylinder 35.
Although it is rotatably supported at the tip of a support shaft S'' that is moved forward and backward by.

It does not have an annular ring or the like for fixing the cylinder core. Therefore, the winding shaft on the side of the support shaft S'' rotates following the rotation of the rotationally driven cylinder core C. However, if necessary, The winding shaft (on the right side of the drawing) having the above-mentioned function of driving the cylinder core may also be adopted. Note that the clamp levers 16 and 36 are levers of a locking mechanism that fix the support shafts s' and s'' with screws, respectively. In order to prevent the winding shaft from retreating and the cylinder core from falling out even if the supply of pressure fluid to the cylinder 29 is stopped, the hollow shaft is manually operated after supporting the cylinder core. This is to secure safety.

As in this embodiment, the sheet winding shaft of the present invention cannot be moved in the axial direction of the cylinder core at the winding position, but is provided at both ends of the cylinder core, and enters the hollow part at both ends of the cylinder core. If applied to a cylinder core holder having a winding shaft that supports the winding, there is no need for conventional key alignment, etc., even in winding machines that are intended for winding or unwinding heavy sheet rolls.
It is also difficult to break down. Furthermore, by designing the annular ring to have a large section modulus, its elastic force is increased, so when the torque of the winding shaft is lost.

The annular ring contracts due to its own elasticity, thereby allowing the roller to naturally return to the deep position of the inclination j11hIt. In addition, since the part that comes into contact with the inner periphery of the cylinder core is the outer periphery of the annular ring, the contact area is large.

Furthermore, if the inner periphery of the annular ring is finished smoothly, it is possible to prevent damage to the rollers on the slanted groove, and it is also possible to provide a winding shaft that can withstand large torques. Furthermore, since the rollers are held at predetermined intervals by the cage and roll, there is no possibility that the annular ring will eccentrically expand or contract.Furthermore, according to this embodiment, the length of the winding shaft can be shortened. As a result, it is possible to reduce the number of moving devices in the axial direction of the winding shaft. Therefore, it is also possible to save space in the winding machine itself.

In the above, several embodiments have been described in which the winding part of the cylinder core or the tip of the sheet band is installed between paired frames or arms. It can also be used to wind up sheet belts by attaching it to a frame or arm and attaching a cylinder core or winding part to the outer periphery.

Furthermore, in each embodiment, the outer periphery of the annular ring 8 may be knurled to form a friction surface to particularly increase the friction with the inner periphery of the cylindrical core fitted thereon. The annular ring is generally made of metal, and the annular ring is made of plastic or metal, and its material can be varied and applied in a variety of ways depending on the well-known technology of the designer. Also,
Component 1 in each embodiment, such as a rolling element, an annular ring,
It goes without saying that combinations can be made as appropriate to the extent that they can be replaced.Furthermore, the method of supporting the shaft on the support shaft does not matter.As mentioned earlier, this sheet winding shaft is used for sheet rewinding. Of course, this is also possible.

(Effects of the Invention) As described above, according to the present invention, what surrounds the outside of the rolling element is an annular ring having a split at one place, which is easy to manufacture and install. Compared to the method using the conventional method, the process of processing multiple and difficult fan-shaped pieces 1 The elastic holding member eliminates the need to connect the fan-shaped pieces that tend to come apart in a ring, reducing the labor of the worker. In addition to this, it is also possible to reduce the number of parts, so the product can be manufactured at a low cost. In addition, there is no risk of work being stopped due to the fan-shaped piece coming off during rotation of the shaft, or of the fan-shaped piece coming off in areas where there is no cylinder core etc. scattering around. In the fixed diameter expansion/contraction operation, the same effect as when using a fan-shaped piece can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory front view of a first embodiment of the present invention. Figure 2 is an enlarged sectional view of the main part of Figure 1, Figure 3 is the 21ji
4 is an explanatory diagram of the cage of the first embodiment,
FIG. 5 is an explanatory front view of the second embodiment of the present invention, FIG. 6 is an explanatory front view of the third embodiment of the invention, FIG. 7 is an enlarged explanatory view of the main part of FIG. 6, and FIG. 7 is a side sectional view, FIG. 9 is a front explanatory view of the fourth embodiment of the present invention, FIG. 1O is an enlarged explanatory view of the main part of FIG. figure,
FIG. 12 is a front explanatory view of the fifth embodiment of the present invention, FIG. 13 is a partially enlarged explanatory view of FIG. 12, and FIG. 14 is a sixth embodiment of the present invention.
FIG. 15 is a front explanatory view of the seventh embodiment, and FIG. 16 is a front explanatory view of still another embodiment. s, s', s"...support shaft, A, A,...support tool,
2... Inclined groove, 3.16-... Rolling element, 7... Crack, 8... Annular ring.

Claims (5)

[Claims] (1) a support shaft, supported by the support shaft, and having a plurality of inclined grooves with inclined bottoms at intervals in the circumferential direction on the outer periphery;
Each of the inclined grooves is provided with a rotation support housing a rolling element that can roll on the bottom surface of the inclined groove, and the rotation of the support causes the rolling element to roll from the deep part to the shallow part of the inclined groove. Accordingly, in the winding shaft for winding or unwinding the sheet band by gradually protruding the rolling elements from the inclined grooves, the outside of the rolling elements is surrounded by an annular ring having a split at one place. Sheet winding shaft. (2) The sheet winding shaft according to claim 1, wherein the bottom surface of the inclined groove has a deep portion at one end and a shallow portion at the other end in the circumferential direction of the rotary support. (3) The sheet winding shaft according to claim 1, wherein the bottom surface of the inclined groove is shallow at both ends in the circumferential direction of the rotary support and deep at the center. (4) The sheet winding shaft according to claim 1, wherein the support shaft is a drive shaft driven by a drive mechanism, and the rotation support is supported on the support shaft so that it can be attached to and removed from the support shaft. (5) The rotation support is freely rotatably supported on the support shaft,
The sheet winding shaft according to claim 1, which is rotationally driven by a drive mechanism.