JPS6312552A - Sheet roll shaft - Google Patents

Abstract

PURPOSE:To aim at simplification in maintenance work, by installing a shaft body having an outer diameter capable of externally inserting a core and plural elastic engaging members, capable of engaging an inner circumferential surface of the sais core and being installed in the said shaft body circumference radially outward along the axial direction. CONSTITUTION:Since plural engaging members 6 having elasticity each are installed in the circumference of a shaft body to be situated in height capable of engaging an inner circumferential surface of a core C radially outward along the axis, when the core C having an axial projecting part 7 is externally inserted into the inner circumference, they are depressed as giving common pressing force to the inner circumferential surface of the core C. Therefore, the shaft body and the core C come into an almost concentric state. And, one in these engaging members 6 is engaged with the side of the projecting part 7 as giving pressing force to the core inner circumferential surface when the shaft body is rotated and driven, whereby it rotates and drives the core C in the same direction as the shaft body. In this case, other engaging members 6 give the specified pressing force to the inner circumferential surface of the core C. When the shaft body is rotated in the reverse direction to the above- mentioned, the core C and the shaft body both are rotated in the same direction.

Description

Detailed Description of the Invention (Field of Application of +t - A seal roll shaft for supporting the winding core of a sheet roll having the above protruding portion and unwinding a belt-shaped sheet.

(Conventional Techniques &) The conventional winding shaft C for the sea 1 has, for example, a gate structure with an inclined bottom that gradually deepens in the circumferential direction provided on the circumferential surface of the shaft body, and a gate structure that is aged and has at least a groove in the gate structure. and a sphere protruding toward the outer periphery of the shaft; - When the shaft rotates relative to the shaft in one direction, the sphere moves to the shallow part of the gate structure, and due to the wedge action of the sphere, the inner surface of the winding core. When the sphere and the shaft body are connected and rotated relative to each other in the opposite direction, the sphere moves into the deep part of the gate structure, and the connection between the two is released. Winding shaft or JP-A-55-56940
proposed in the official gazette. And 1. For example, if the inner circumferential surface of the core is smooth and smooth on the entire surface, such as a paper tube, and if the core inner diameter is not too large compared to the outer diameter of the core. In some cases, the winding core can be effectively fixed.

In addition, as for other types of conventional seal roll shafts, there are examples of other types of conventional seal roll shafts, such as Utility Model Publication No. 57-:19]98. As described in No. 1 IA, there is a type of saw-toothed plate blade cut into the inner periphery of the winding core on the outer periphery of the shaft.

(Problem 1) However, the core used for winding the strip sea 1~ is a plastic tube or the like that has a rift projecting radially inward on its inner circumferential surface. The former type of sheet winding shaft cannot effectively support this type of winding core.

In other words, when supporting a winding core with an inward protrusion as shown in ]-, the outer diameter of the winding shaft is determined by considering the protrusion, not the inner diameter of the winding core itself. Therefore, even if the protruding portion contacts the outer periphery of the sheet winding shaft, there is a relatively large distance between the inner circumferential surface of the core other than the protruding portion and the outer circumferential surface of the sheet winding shaft. There will be a gap. In this ball lock type sheet winding shaft, if the height of the protrusion is relatively large, even if the core fixing sphere protrudes from the outer periphery of the shaft, the inner periphery of the core may not be fully covered due to insufficient protrusion. It may not be possible to push the core firmly, and therefore it may not be possible to securely fix the core. In addition, the above ball [
Since the protrusion of each sphere in a single-type winding shaft is not uniform, when supporting a winding core that has about one protrusion in the axial direction, the above-mentioned gap may open. The winding core and the winding shaft are fixed eccentrically, and it may be impossible to wind the winding properly. Furthermore, 1. In the case of the ball rook type described above, the surface of the ball protruding from the shaft surface is not perpendicular to the shaft surface but is inclined, so when it engages with the protruding part 1), it must be radially outward. Trying to push it forward. Therefore, in the case of the 1-leg type, if it is used with a core made of relatively soft and easily deformable material such as plastic lrI: ', 'N, the core may deform and engage with the core. It may happen.

In addition, in the case of the above-mentioned winding shafts, the saw teeth may damage the winding core, and the winding core is fixed when driven in the direction of -4-'C. , It is very troublesome to handle the winding shaft in cases where it is necessary to reverse the front and back of the original sheet 1 by changing only the direction of the rotational force without changing the support state of the winding shaft. become.

(L-th R stage to solve the problem) Therefore, the present invention has the following features: 1. The winding shaft consists of a shaft body with an outer diameter capable of extrapolating the winding core + RF, and an inner periphery of the L-shaped winding core. Surface and convergence 1if
a plurality of engaging members having elasticity and provided along the axial direction radially outward on the outer periphery of the shaft;
It is characterized by being able to grow.

(Function) The plurality of engaging members having a length l'1M are provided radially outward along the axis on the outer periphery of the shaft so as to be located at a height where they can engage with the inner circumferential surface of the winding core. Therefore, when a core having an axial protrusion on its inner periphery is inserted, the core is pressed down while applying a common pushing force to the inner peripheral surface of the core. Therefore, the shaft and the winding core are substantially concentric. When the winding core is extrapolated, one of the plurality of engaging members is pushed against the inner circumferential surface of the winding core (=
It engages with the side surface of the protruding portion while applying a force of -6, and rotates the winding core in the same direction as the rotating direction of the shaft body. In this case, the other engaging member applies a predetermined pressing force to the inner circumferential surface of the core. When the shaft is rotated in a direction opposite to the I-direction, an engaging member other than the first one engages with the opposite side surface of the protrusion, causing the core to rotate in the same direction as the shaft.

(Example) Hereinafter, the present invention will be explained with reference to examples shown in the figures.

1 to 3 show a first embodiment of the present invention. In this embodiment, the shaft body of the winding shaft A has three radial through holes L arranged at equal intervals per cross section in the axial direction, and the hollow shaft 2 is renumbered one after another in the axial direction. , each L of the hollow shaft 2
The respective winding collars 3 are IK mounted on the hollow shaft 2 so as to be rotatable at the outer peripheral position corresponding to the 11 through holes, and each of the above [°1
The press 1-lin 4 is fitted into the through hole 1, its outer end is directed toward the inner periphery of the collar 3, and the inner end is slightly protruded from the through hole 1 into the hollow part of the hollow shaft 2. The tube 5 is expandable and extends through the hollow part of the hollow shaft 2 so as to support the inner end of the shaft 4, and is expandable. The mating members 6 are provided at six locations on the outer periphery of the collar 3 at equal intervals in the circumferential direction and along the axis of the winding shaft. This sheet winding shaft A has a diameter from the axis to the circumferential surface of the collar row.
It is equal to the value obtained by subtracting the height of the protruding part in 4- from the diameter,
Or it has a thickness that is slightly less than that. ”−
The engaging member 6 is made of elastic piano wire, and both ends of the engaging member 6 are fixed in holes in the bottom surface of circumferential step portions 8, 8 formed in the collar 3. - The left and right ends of the outer peripheral surface of the reporter collar 3 are provided with inclined surfaces, respectively. As is clear from FIG. 3, the engaging member 6 shown in -4- is always moved in the radial direction by the shaft so that the intermediate engaging part 9 is located at a higher position than the inner circumferential surface of the winding core C. Supported outwardly. In this embodiment, the radius from the axis of the shaft body to the outer end of the retaining portion is made equal to the radius of the inner periphery of the core when the engaging member is pressed down by the core. Therefore, there is no gap between the engaging member and the outer periphery of the collar in the engaged state.

In this embodiment, when the sheet winding shaft A supports the winding core C and the belt-shaped sheet S is wound around the outer periphery of the winding core C, for example, the winding shaft A
Extrapolate the winding core C from one end of. In this case, the engaging member 6
Be careful not to line up with the protruding portion 7. ”−
When the recording core C is extrapolated, the six retaining parts 446 that are provided on the outer periphery of the collar 3 and supported radially outward so as to be at a higher position than the inner circumferential surface of the core are as follows. (Pushed by the inner peripheral surface of the core C and pushed to the outer periphery of the collar 3)
Since it tries to push up the inner circumferential surface of the core with its own bullet H, it engages with the inner circumferential surface of the core. In this state, the radius from the axis of the first winding shaft to the outer end of the engaging part is approximately equal to the diameter of the inner circumferential surface of the winding core, and each engaging member 6 has the same degree of elasticity. Then, the winding shaft A and the winding core C
and are definitely supported concentrically. When the engagement state 1 is reached, fluid is supplied into the tube 5 to slide the push rod 4 located in the through hole 1 in the radial direction outward. The outer end of the forest 4 and the inner end of the collar 3 are brought into a state where they can be engaged with each other, and the drive mechanism drives the hollow shaft 2 in a predetermined direction.As a result, each collar 3 begins to rotate.Each collar After 3 rotations, it will be located on the outer circumference,
One of the retaining parts 9 of the plurality of engaging members 6 that rotate together engages with the side surface of the protrusion part 7 in the axial direction that is located on the inner periphery of the winding core, and the bipedal protrusion part 7 is attached to the collar 3. Push forward in the direction of rotation. Thereby, the winding core C is rotationally driven in a predetermined direction. The engaging portions 9 of the other engaging members 6 that do not engage with the side surface of the protruding portion 7 engage with the inner circumferential surface of the winding core, and can apply a predetermined common pressing force to the inner circumferential surface. Therefore, although there is some resistance when attaching and removing the winding core, the shaft body and the winding core will not become eccentric during winding, and even if winding is interrupted, the winding core will not shift in the axial direction. . When the shaft body is rotated in a direction opposite to the rotational direction, an engaging member 6 other than the previous engaging member engages with the opposite side surface of the protruding portion 7, and the core is rotated against the shaft. Rotationally driven in the same direction as the body's rotational direction. Due to the elasticity of the engaging member, when the winding core is extrapolated onto the winding shaft, both ends of the engaging member may tilt slightly from the radial direction, or when the winding shaft is further driven, the engaging member may tilt out of the circle of the collar. Although it may move slightly in the circumferential direction, it does not interfere with the rotational drive of the winding core.

In this embodiment, a small diameter stepped portion is recessed in the circumferential direction on the outer periphery of the shaft body, but it is also possible to make this a partial recessed portion. In addition, when the winding core is inserted and there is some gap between the engaging member and the outer circumference of the collar, that is, when the protrusion of the engaging member is at its minimum, If the diameter of the winding shaft up to the outer end of the engaging member is smaller than l'-IY of the inner circumference of the winding core, a large pileup will act on the winding core during sheet winding. The engaging member may bend unnecessarily, causing the core and shaft to become eccentric.
In such a case, the engaging member may be made of a material having enough elasticity not to bend against the force acting on the winding core.

FIG. 4.5 shows a second embodiment of the present invention, in which the elastic engagement member 6 has an axial screw l opening provided on the left and right sides of the collar 3 in a reverse manner. , 10 are fastened with link portions 11° 11 formed in the four parts at both ends.

As in the previous embodiment, the winding core C is not extrapolated f! 1
The retaining portion 9 of the engaging member in 2 protrudes radially outward from the outer periphery of the collar 3. Also, the engaging member 6 described in
is pushed down against its own bullet +11 by extrapolating the core C, and is engaged with the inner circumferential surface of the core. When winding up the sheet, the engaging portion 9 of the engaging member 6 hits the side surface of the protruding portion 7 on the inner circumferential surface of the winding core, thereby preventing the winding core C from rotating in the same direction as the hollow shaft 2. This is similar to the previous embodiment.

In addition, the figure]- shows only one engaging member, or multiple engaging members are provided on the outer periphery of the winding shaft, and the winding shaft A and the winding core C are almost concentrically connected by the plurality of engaging members. It's not a good idea to be fixed.

FIG. 6.7 shows a third embodiment of the present invention, in which an elastic engaging member 6 has one end located in four depressed portions 8 formed at equal intervals per cross section on the outer periphery of the winding shaft A. are screwed together, and the retaining portion 9 protrudes radially outward from the outer periphery of the winding shaft. When the winding core C is inserted externally, the engaging portion 9 rotates around the screwed end IF and is pushed down, and engages with the inner circumferential surface of the winding core due to its own elasticity.

One of the four engaging members 6 engages with the side surface of the protruding portion by rotationally driving the winding shaft A. Winding shaft and winding core 4
Being fixed substantially concentrically by the engaging members means t
Not even a good C. As the winding shaft, a well-known solid shaft which is rotationally driven by a drive mechanism is used.

FIG. 8 shows an example of the unexploited 1111 (7) of the unexploded 1. is formed, and the 1+4 ends of the plate-shaped retaining portion 4]6 are supported by the support handles 1 and 13 within the recessed portion. To the supporting handle 13, do not remove the engaging member 6 from the row of the shaft body 1z in the state 11 where the winding core is not extrapolated.
．． C is limited to the recessed portion 14 in the circumferential direction of the arrangement. The reliability of the old engaging part, etc. is the same as in the first embodiment (explanation will be omitted).

Although the present invention has been described in a small number of embodiments, and the present invention may be carried out in various ways without changing the spirit of the invention as set forth in the claims, The change applied to Knee Uma "C" is also applied.

For example, the plurality of engaging members need only be able to engage with the side surfaces of the protruding portions of the winding core, and their arrangement in the circumferential direction is not limited to the -a spacing. - When the present invention is applied to a long wooden winding shaft, the engaging member may be located at one location in the axial direction, or may be located at multiple locations. moreover,
When the engaging members are provided at two or more locations in the axial direction of the winding shaft, they may be arranged on the same line, or may be arranged in a staggered manner. Even if the engaging member is made of a material other than those already illustrated, the material is not limited as long as it has elasticity. The means for fixing the engagement member to the outer periphery of the winding shaft can be varied in particular in a wide variety of ways. As a winding core,
It is also possible to use a metal tube or the like with a seam in the axial direction.

The sheet winding shaft to which this invention is applied may locally support the inner periphery of the winding core. Furthermore, there are various types of friction type sheet winding shafts shown in the ff1l embodiment, and the present invention can be applied to any of them.

(Effects of the Invention) According to the present invention, since the engaging members are provided in the radial direction on the outer periphery of the shaft body, even if the engaging members protrude only a small amount, the side surface of the engaging members can be securely wound. It engages with the protrusion on the inner circumference of the core. Therefore, even if the winding core has a protrusion on its inner circumferential surface, it can be reliably supported and rotated almost concentrically with the existing shaft so as not to idle. In No. 1, each retaining portion is always engaged with the inner circumferential surface of the winding core, so that the winding shaft and the winding core always maintain the retaining state IE. Therefore, even if the winding is interrupted midway and then the winding is started without inward winding, the core will not shift in the axial direction of the winding shaft. Furthermore, even if the shaft body is rotated in either the +1 or the opposite direction, the winding core can be rotated in the same direction as the rotation direction. In addition, it is possible to exhibit sufficient durability with a relatively simple structure, reduce cost, and simplify maintenance work.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of a sheet winding shaft according to the first embodiment of the present invention; FIG. The main part of the expansion theory IJI country, Figure 4 is the second part of the present invention.
A side view of the collar according to the embodiment, Fig. 5 is the same as 1--
1 is a plane view IJI diagram, FIG. 6 is a front view of the winding shaft in the third embodiment of the present invention, FIG. 7 is a lateral force sectional view of the same, and FIG. 8 is still another embodiment of the present invention. FIG. A... Winding shaft, C... Winding core, S... Band-shaped sheet 6-
...Engagement member, 7...Protrusion portion, 9...Engagement portion.

Claims (1)

[Scope of Claims] A sheet winding shaft that supports and rotationally drives a winding core having an axial protrusion on its inner peripheral surface, comprising: a shaft body having an outer diameter that allows the winding core to be extrapolated; 1. A sheet winding shaft comprising a plurality of elastic engaging members which are capable of engaging with an inner circumferential surface of a winding core and are provided on the outer periphery of the shaft body along an axis in a radial outward direction.