JP3884696B2 - Cylindrical fixture - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cylindrical fixture, and more particularly to a cylindrical fixture that can fix various cylindrical bodies having different inner diameters with a simple configuration.
[0002]
[Prior art]
As a structure for fixing the cylindrical body in a rotatable manner, for example, a fixing structure disclosed in Patent Document 1 is known. This fixing structure includes a core around which a sheet is wound, and after the sheet is wound up to form a sheet winding body, when the sheet winding body is extracted from the core, the radial direction of the core The size of is becoming smaller.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 6-144712
[Problems to be solved by the invention]
However, in the fixing structure, the size of the core in the radial direction cannot be changed except when the sheet winding body is pulled out, and the sheet winding body cannot have different inner diameters. There is an inconvenience.
[0005]
By the way, as a device for fixing cylindrical bodies having different inner diameters, a fixing device using a chuck-like shaft-like body inserted into the cylindrical body is known. That is, in this fixing device, a plurality of longitudinal grooves are formed on the distal end side of the shaft-like body, and the distal end side is enlarged or reduced in the radial direction by a driving device such as a motor.
However, in such a fixing device, since the distal end side of the shaft-like body is enlarged and reduced in the radial direction by the drive device, the shape and structure of the shaft-like body are complicated, which increases the manufacturing cost of the device. Inconvenience of inviting.
[0006]
OBJECT OF THE INVENTION
The present invention has been devised by paying attention to such inconveniences, and an object of the present invention is to provide a cylindrical body fixture that can fix cylindrical bodies having different inner diameters with a relatively simple configuration. It is to provide.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention includes a shaft-shaped body that is inserted into a cylindrical body, and a fixing tool that fixes the tubular body with the shaft-shaped body.
The shaft-shaped body includes a holding member that holds the cylindrical body;
A movable member that is movable in the axial direction and the radial direction with respect to the holding member and has a protrusion ,
The protrusion is connected to the movable member in a state in which relative rotation is allowed between the stopper and the adjustment knob, and in a state in which displacement in the radial direction is allowed, and is engaged with a screw hole provided in the holding member. And an operation unit with a screw shaft
By rotating the adjustment knob in the screwing direction of the screw shaft, the movable member moves to the adjustment knob integral with the radial direction of the shaft-like body part cylindrical body in fixing the tubular body Magnify along ,
By rotating the adjustment knob in the direction opposite to the screwing direction, the movable member moves integrally with the adjustment knob, and a part of the shaft-like body when releasing the fixation of the cylindrical body is part of the cylindrical body. It is configured to reduce along the radial direction . According to such a configuration, the movable member moves along the axial direction, so that a part of the shaft-like body when the tubular body is fixed expands / contracts along the radial direction of the tubular body. Therefore, it is possible to fix various cylindrical bodies having different inner diameters with a simpler configuration than the conventional chuck type.
[0008]
It is preferable that the holding member in the present invention has a tapered surface inclined in the axial direction, and the movable member moves along the tapered surface. By configuring in this way, a part of the shaft-like body can be changed to an almost unsettled floor (analog) within a predetermined range, and it becomes possible to deal with a wider variety of cylindrical bodies.
[0009]
Further, a configuration in which a pair of pressing members that sandwich both end sides of the cylindrical body in a state where the shaft-shaped body is inserted into the cylindrical body can be used in combination. Thereby, the movement of the said cylindrical body in the length direction can be controlled in the state where the cylindrical body was fixed. Here, the pair of presser members may be provided so that their separation width can be adjusted. According to such a structure, the said cylindrical body can be fixed according to the length of a cylindrical body, and it can respond also to the various cylindrical bodies from which length differs.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 shows a schematic perspective view of a fixture according to the present embodiment in which a paper tube as a cylindrical body is fixed, and FIG. 2 shows a schematic cross-sectional view of FIG. 3 is a cross-sectional view taken along line AA in FIG. In these drawings, the fixture 10 is provided in a cantilevered rotating shaft shape that rotatably supports the paper tube T, and is fed out while rotating the strip B wound around the paper tube T, or It is used when winding the strip B around the paper tube T while rotating the tube T. The fixture 10 includes a shaft 11 inserted into the paper tube T, and the left and right ends in FIG. 2 of the paper tube T in the state where the shaft 11 is inserted into the paper tube T. A pair of presser members 12 and 12 to be sandwiched are provided.
[0012]
The shaft 11 is supported by a driving device 14 such as a motor on the right end side in FIG. 2 and can be rotated by driving the driving device 14. The shaft-like body 11 is positioned on the lower side in FIG. 2 and is held in the paper tube T. The shaft-like body 11 is positioned on the upper side in FIG. The movable member 16 is movable in the middle and left and right directions.
[0013]
As shown in FIG. 4, the holding member 15 is obtained by cutting out the upper end side of the cylinder in the figure in a U-shaped cross section over substantially the entire area in the axis L direction. A groove 18 is formed in which a part of the movable member 16 is accommodated. The groove portion 18 is set to a groove width that is substantially constant over substantially the entire area, and is located on one end side (the left end side in FIG. 4) of the holding member 15 and has a constant depth region 20 that has a substantially constant depth; A depth that is continuous with the constant depth region 20 through a step in the lower part of the figure, and gradually decreases from the constant depth region 20 toward the other end side (right end side in FIG. 4) of the holding member 15. It consists of a change area 21. That is, a tapered surface 23 that is inclined in the axis L direction is formed at the bottom of the depth change region 21, and this tapered surface 23 is gradually inclined upward in FIG. 4 toward the other end side of the holding member 15. Yes. A hole 24 that extends downward in FIG. 4 and communicates with the outside is formed at the boundary between the constant depth region 20 and the depth change region 21. The hole 24 is substantially equal to the groove width of the groove 18. The same hole diameter is set.
In addition, a screw hole 25 is formed substantially along the axis L at the approximate center of the left end side of the holding member 15.
[0014]
The movable member 16 includes a main body 27 accommodated in the groove portion 18 so as to be movable along the tapered surface 23. The main body 27 is connected to an operation side region 30 adjacent to an operation unit 28 described later, and a taper region 31 having an outer shape substantially corresponding to the internal shape of the depth change region 21 while being connected to the operation side region 30 through a step. It consists of.
[0015]
The operation side region 30 is set to have a length in the direction of the axis L longer than the length of the constant depth region 20, and has a main portion 33 having a cross-sectional shape substantially corresponding to the internal shape of the constant depth region 20. And a projecting portion 34 that is continuous through a step on the operation portion 28 side of the main portion 33.
[0016]
The tapered region 31 has a length in the direction of the axis L that is set shorter than the length of the depth change region 21, and corresponds to a shallow groove portion located on the right end side in FIG. The shape is cut.
[0017]
As shown in FIG. 4, the operation portion 28 is provided in a substantially cylindrical shape with a bottom and adjusts the movement of the movable member 16, and extends from the approximate center of the adjustment knob 36 along the main portion 33. And a screw shaft 37 extending in the direction of the taper region 31 and a hook-shaped stopper 38 provided around the screw shaft 37. The adjustment knob 36 is not particularly limited, but has an outer diameter that is substantially the same as the maximum outer diameter of the holding member 15 or less. As shown in FIG. 2, the screw shaft 37 is fixed to the adjustment knob 36 with a screw 40 or the like so that it can rotate integrally with the adjustment knob 36. Further, the screw shaft 37 is provided in such a length that it is received from below in the groove 34A provided on the lower surface side of the projection 34 from the adjustment knob 36 and reaches the lower position of the main portion 33 in FIG. The stopper 38 is located on the right end side in FIG. 2 of the protrusion 34 and restricts the main body 27 when the stopper 38 moves to the left in the figure with the adjustment knob 36. The relative movement to the right is restricted by the abutment of the opposing end faces of the protrusion 34 and the adjustment knob 36. At that time, the radial displacement of the movable member 16 is allowed in the groove 34A. That is, the main body 27 and the adjustment knob 36 are connected so as to be able to move integrally in the direction of the axis L while allowing relative rotation.
[0018]
As shown in FIGS. 2 and 4, the movable member 16 having the above configuration is attached to the holding member 15 side by engaging the screw shaft 37 with the screw hole 25 of the holding member 15. At this time, the operation side region 30 is accommodated in the constant depth region 20, while the tapered region 31 is accommodated in the depth changing region 21. Here, when the holding member 15 and the movable member 16 are combined with each other, the screw shaft 37 is completely screw-holed in the reference state (the state shown in FIGS. 2 and 3) in which the outer periphery thereof is substantially the same circumferential shape. 25, and a space formed by the end portion of the groove portion 18 on the drive member 14 side and the hole portion 24 is formed on both the left and right ends of the tapered region 31 in FIG. From this state, when the adjustment knob 36 is rotated in the tightening direction with respect to the main body 27, the screw shaft 37 is rotated and further screwed into the screw hole 25, and the main body 27 and the adjustment knob 36 are moved relative to the holding member 15. Then, it moves in the direction of the driving device 14. At this time, as shown in FIG. 5, the taper region 31 moves along the taper surface 23, and the upper end edge of the taper region 31 in FIG. It moves upward in the figure. For this reason, a part of the shaft-like body 11 when the paper tube T is fixed is partially enlarged as compared with before the movement. On the other hand, when the adjustment knob 36 is rotated in the direction opposite to that described above from this state, a part of the shaft-like body 11 when the paper tube T is fixed is partially reduced.
[0019]
The pressing members 12, 12 are each provided in a ring shape, and can be separated from each other while being attached around the shaft-like body 11. The center hole 43 of the pressing member 12 is not particularly limited, but is set to an inner diameter that is substantially the same as or larger than the maximum outer diameter of the shaft-like body 11. Further, a groove that is wider than the movable member and longer than the maximum protruding amount of the movable member is formed, and a screw hole 44 that is continuous with the center hole 43 is formed on the outer peripheral side of the presser member 12 at the center of the groove portion. By screwing the screw member 45 into the hole 44, the movement of the pressing members 12 and 12 in the direction of the axis L is restricted, and the separation width thereof can be adjusted.
[0020]
Next, a procedure for attaching and detaching the fixture 10 to and from the paper tube T will be described.
[0021]
First, the presser member 12 on the operation unit 28 side is once removed from the shaft-shaped body 11, and the maximum outer diameter of the shaft-shaped body 11 (outside along the vertical line L 1 passing through the center C in FIG. Diameter) is made smaller than the inner diameter of the paper tube T. In this state, the paper tube T is fitted into the shaft-like body 11 from the operation unit 28 side. Then, the adjustment knob 36 is rotated in a direction in which a part of the shaft-like body 11 is partially enlarged, and the shaft-like body 11 is engaged in the paper tube T, whereby the paper tube T is engaged with the shaft-like body 11. Are held so as to be integrally rotatable. Next, the presser members 12, 12 so that the presser member 12 once removed is fitted into the shaft-like body 11 from the operation unit 28 side and the paper tube T is sandwiched between the presser member 12 on the drive device 14 side. Is slid along the shaft 11. When the pressing members 12, 12 come into contact with both ends of the paper tube T, the pressing members 12, 12 are fixed to the shaft-like body 11 with the screw members 45, 45. Thereafter, the driving device 14 is driven to feed or wind the paper tube T around the belt-like body B. After the completion, the paper tube T is pulled out from the shaft-like body 11 by the reverse operation.
[0022]
Therefore, according to such an embodiment, there is an effect that the paper tube T having various inner diameters can be fixed by expanding and contracting a part of the shaft-like body 11 with a simple configuration.
[0023]
In addition, the structure of each part in this invention is not limited to the structural example of illustration, The shaft-like body at the time of fixing the paper tube T by moving the movable member 16 to the axis line L direction with respect to the holding member 15 is shown. As long as a part of 11 is enlarged or reduced, various changes can be made.
[0024]
Moreover, in the said Example, although the fixing tool 10 of the paper tube T was demonstrated, it is also possible to apply this invention to the fixing tool of another cylindrical body.
[0025]
【The invention's effect】
As described above, according to the present invention, by moving the movable member in the axial direction relative to the holding member, a part of the axial pair when the cylindrical body is fixed is partially enlarged or reduced. Since it was set as the structure, the versatility which can fix various cylindrical bodies from which an internal diameter differs with a comparatively simple structure can be provided.
[0026]
Further, since the holding member is provided with a tapered surface inclined in the axial direction, and the movable member moves along the tapered surface, a partial position of the shaft-like body can be changed in a finer range. Thus, it becomes possible to deal with more types of cylindrical bodies.
[0027]
Furthermore, since the shaft-like body is inserted into the cylindrical body, and has a pair of pressing members that sandwich both end sides of the cylindrical body, the cylindrical body is fixed in a state where the tubular body is fixed. Movement in the length direction of the body can be restricted.
[0028]
Moreover, since the separation width of the pair of presser members is provided so as to be adjustable, the cylindrical body can be fixed according to the length of the cylindrical body, and can be applied to various cylindrical bodies having different lengths. It becomes.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a fixing device according to an embodiment together with a paper tube.
FIG. 2 is a schematic cross-sectional view of FIG.
FIG. 3 is an enlarged cross-sectional view taken along line AA in FIG. 2;
FIG. 4 is an exploded perspective view of a shaft-like body constituting the fixture.
FIG. 5 is an enlarged cross-sectional view for explaining the movement of the movable member relative to the fixed member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Fixing tool 11 Shaft-shaped body 12 Holding member 15 Holding member 16 Movable member 23 Tapered surface T Paper tube (tubular body)
L axis

Claims (4)

In a fixture comprising a shaft-like body inserted into the inside of the tubular body, and fixing the tubular body with the shaft-like body,
The shaft-shaped body includes a holding member that holds the cylindrical body;
A movable member that is movable in the axial direction and the radial direction with respect to the holding member and has a protrusion ;
The protrusion is connected to the movable member in a state in which relative rotation is allowed between the stopper and the adjustment knob, and in a state in which displacement in the radial direction is allowed, and the protrusion is engaged with a screw hole provided in the holding member. And an operation unit having a screw shaft to be joined,
By rotating the adjustment knob in the screwing direction of the screw shaft, the movable member moves to the adjustment knob integral with the radial direction of the shaft-like body part cylindrical body in fixing the tubular body to expand along the,
By rotating the adjustment knob in the direction opposite to the screwing direction, the movable member moves integrally with the adjustment knob, and a part of the shaft-like body when releasing the fixation of the cylindrical body is part of the cylindrical body. A cylindrical fixture, wherein the fixture is reduced along the radial direction .   The cylindrical body fixture according to claim 1, wherein the holding member includes a tapered surface inclined in the axial direction, and the movable member moves along the tapered surface.   The cylindrical body according to claim 1 or 2, further comprising a pair of pressing members that sandwich both end sides of the cylindrical body in a state where the shaft-shaped body is inserted into the cylindrical body. Fixture.   The cylindrical body fixture according to claim 3, wherein the pair of presser members are provided so that a separation width thereof can be adjusted.

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