JP2018135205A - Adaptor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change a diameter of a winding shaft.SOLUTION: An adaptor 20 comprises an adaptor body 22 so provided with a shaft hole 24 into which a winding shaft is fitted as to penetrate to both end surfaces, and an engaging part 44 provided so as to define the shaft hole 24 in the adaptor body 22 while constituted to be deformable in a radial direction of the adaptor body 22. The adaptor 20 further comprises a pressing part 46 which is held by a holding part 48 provided to the adaptor body 22 while being movable to the inside and to the outside in the radial direction of the adaptor body 22 for pressing the engaging part 44 toward the winding shaft fitted into the shaft hole 24 to press the engaging part 44 against the winding shaft.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an adapter used for a sheet take-up shaft.

  There is an apparatus called a slitter that winds up a product sheet obtained by continuous cutting in an arbitrary vertical width while rewinding a continuous sheet-like long roll of paper, film, metal foil or the like. The slitter includes a winding shaft that rotates around its axis (see, for example, Patent Document 1), and a winding core formed in a cylindrical shape from paper, plastic, or the like is rotatably fitted to the outside of the winding shaft. The product sheet is wound up with a roll core. When the winding is completed, the winding core is moved in the axial direction of the winding shaft, the winding core is pulled out from the winding shaft together with the wound product sheet, and a new winding core is attached to the winding shaft. doing. For this reason, when the core is attached to or removed from the winding shaft, the winding core is free so that the core can be moved in the axial direction with respect to the winding shaft. In order to rotate integrally with the winding core, the winding core is held from the inside by a locking member provided on the winding shaft.

Japanese Patent Laying-Open No. 2015-178414

  The larger the diameter of the winding core, the smaller the fluctuation of the pulling force between the start and end of winding of the product sheet. In addition, the smaller the diameter of the winding core, the larger the distance that can be wound, and the advantage that it can be made compact when the same distance is wound. As described above, the core used for winding the product sheet has various diameters depending on the type of the sheet to be wound or the customer's request. However, aligning winding shafts of various diameters with various types of winding cores leads to various problems such as increasing costs and requiring a place for storing a plurality of winding shafts. I will.

  The present invention has been proposed in view of the above-described problems related to the prior art, and has been proposed to suitably solve these problems. An adapter that can be attached to a winding shaft and can easily change the diameter of the winding shaft. The purpose is to provide.

In order to overcome the above-mentioned problems and achieve the intended purpose, the adapter of the invention according to claim 1 of the present application provides:
An adapter body provided so that a shaft hole into which the winding shaft is fitted penetrates both end surfaces;
An engagement portion provided to define the shaft hole in the adapter body, and configured to be deformable in a radial direction of the adapter body;
The engaging portion is held by the holding portion provided in the adapter main body so as to be movable inward and outward in the radial direction of the adapter main body, and the engaging portion is pushed toward the winding shaft fitted in the shaft hole. And a pressing portion that presses the winding shaft against the winding shaft.
According to the invention which concerns on Claim 1, the diameter of a winding shaft can be easily changed with an adapter by attaching an adapter to a winding shaft. In addition, the adapter can be easily fixed to the take-up shaft by pressing the engaging portion that defines the shaft hole in the adapter main body against the take-up shaft fitted in the shaft hole. And since the engaging part which defines the shaft hole in the adapter body is configured to be pushed and deformed by the pressing part, when the adapter is attached to the winding shaft, the outer periphery of the adapter facing the inner peripheral surface of the winding core Can be prevented from being deformed.

In the invention according to claim 2, the pressing portion can be operated to move forward and backward with respect to the engaging portion through an operation opening opened in the adapter main body, and when the pressing portion is not operated. Furthermore, the gist of the invention is that the holding portion restricts the forward and backward movement with respect to the engaging portion.
According to the invention of claim 2, with a simple configuration, the engaging portion can be pressed against the take-up shaft by pressing with the pressing portion, and the state where the engaging portion is pressed against the take-up shaft can be maintained. .

In the invention which concerns on Claim 3, the said press part is a set screw which moves to the radial direction inside and outside of the said adapter main body by rotation operation via the said operation opening,
The holding portion is provided so as not to move inward and outward in the radial direction of the adapter body with respect to the adapter body, and has a screw hole into which the pressing portion can be screwed.
The gist of the present invention is that the operation opening is formed in the outer peripheral surface of the adapter body so as to match the outer diameter of the pressing portion.
According to the invention which concerns on Claim 3, since the operation opening opened in the outer peripheral surface of an adapter main body is formed according to the press part using a set screw, the magnitude | size of the operation opening drilled in the outer peripheral surface of an adapter main body is set. Can be minimized. Thereby, when the adapter is attached to the winding shaft, it is possible to more suitably prevent the outer periphery of the adapter that is opposed to the inner peripheral surface of the core from being deformed.

In the invention according to claim 4, the engaging portion is provided between an opening formed so as to open to at least one end surface of the adapter body and the shaft hole, and the shaft hole in the adapter body is provided. The gist of the present invention is that the inner peripheral portion surrounding the wall is thinned.
According to the invention which concerns on Claim 4, the engaging part which can be deform | transformed to the radial direction of an adapter main body can be provided by the simple structure which thins a part of adapter main body.

  With the adapter according to the present invention, the diameter of the winding shaft can be easily changed.

1 is a perspective view showing a winding shaft to which an adapter according to a preferred embodiment of the present invention is mounted. It is a side view which shows the winding unit of the winding shaft of an Example. It is a side view which shows the adapter of an Example. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is a schematic perspective view which shows the adapter of an Example. It is a schematic perspective view which shows the adapter of an Example, and shows the opposite side to FIG. The holding member and the biasing means are removed. It is a schematic perspective view which shows the adapter of an Example, and has shown the fixing means disassembled. The holding member and the biasing means are removed. It is a side view which shows the state which attached the adapter of the Example to the winding unit. In the adapter of an Example, it is explanatory drawing which shows cooperation with a latching member and a holding member, Comprising: (a) is in the state which the latching member retracted, (b) is in the state which the latching member protruded . It is a side view which shows the principal part of the adapter of the modification 1, (b) shows the opposite surface to (a). It is sectional drawing which shows the principal part of the adapter of the example 1 of a change. It is a side view which shows the principal part of the adapter of the modification 2, (b) shows the opposite surface to (a). It is sectional drawing which shows the principal part of the adapter of the example 2 of a change.

  Next, a preferred embodiment of the adapter according to the present invention will be described below with reference to the accompanying drawings.

  As shown in FIG. 1, a winding shaft 10 to which the adapter 20 according to the embodiment is mounted is used in a roll winding device such as a slitter, and is fitted on the outer periphery of a cylindrical shaft core portion 12. A plurality of cylindrical winding units 14 are mounted side by side in the axial direction of the shaft core portion 12. As shown in FIG. 2, the winding unit 14 includes a locking member 16 that is provided on an outer peripheral ring rotatably attached to a cylinder block via a bearing so as to enter and exit from the inside. The winding unit 14 of the embodiment is provided with a plurality (three) of locking members 16 spaced apart at equal intervals in the circumferential direction. A winding core is attached to the winding shaft 10 on the outside of the outer ring at a position where the locking member 16 of the winding unit 14 is retracted inward so that the protruding amount from the outer circumferential surface of the outer ring is small. . The take-up shaft 10 moves each of the plurality of locking members 16 radially outward by urging means such as air supplied through the shaft core portion 12 or a spring built in the take-up unit 14. By setting the protruding position, the tip of the locking member 16 is pressed against the inner side of the core, and the core is fixed to the winding unit 14. Further, the winding shaft 10 has an outer periphery with respect to the shaft core portion 12 by a piston that is operated by air supplied through the shaft core portion 12 from a free state in which the outer peripheral ring can rotate with respect to the shaft core portion 12. The ring is fixed, and the winding unit 14 and the attached winding core rotate as the shaft core 12 rotates.

  As shown in FIG. 1, the adapter 20 according to the embodiment is fitted to the take-up shaft 10 by being fitted to the outside of the outer peripheral ring of the take-up unit 14, and a winding core is attached to the outer circumference of the adapter 20. As shown in FIGS. 3 to 7, the adapter 20 includes an adapter main body 22 provided with a shaft hole 24 into which the take-up shaft 10 is fitted, and a holding member 26 provided in the adapter main body 22. The gap between the outer diameter of the winding shaft 10 and the inner diameter of the winding core is filled by being interposed between the winding core 10 and the winding core. The adapter 20 includes a fixing means 42 for fixing the adapter 20 to the winding shaft 10. The adapter 20 rotates together with the winding shaft 10 by being fixed by the fixing means 42, and the fixing means 42 is released to take up the winding shaft. It is attached to and detached from the shaft 10. The adapter 20 is configured such that the holding member 26 is movable inward and outward from the shaft hole 24 toward the outer peripheral surface of the adapter main body 22. Here, the inside / outside direction refers to a direction intersecting the penetrating direction of the shaft hole 24 (the axial direction of the winding shaft 10), and even if it passes through the center of the shaft hole 24 (the axis of the winding shaft 10), it does not pass. May be. In the embodiment, the holding member is adjusted in accordance with the moving direction of the locking member 16 that is orthogonal to the axial direction of the winding shaft 10 and moves in the direction passing through the axis of the winding shaft 10 (particularly, the radial direction when distinguished). 26 is configured to move in the radial direction passing through the center of the shaft hole 24 while being orthogonal to the penetrating direction of the shaft hole 24.

  As shown in FIGS. 3 and 5 to 7, the adapter main body 22 is a disk-shaped member made of plastic, metal, or the like, and a winding shaft having a circular shaft hole 24 formed through the central portion thereof. It is formed in a shape based on a circle according to the outer periphery of 10. Further, the adapter body 22 has a circular outer peripheral shape in accordance with an inner peripheral surface formed in a circular shape in the cylindrical core. The adapter body 22 has a thickness in the penetrating direction of the shaft hole 24 set in accordance with the thickness of the winding unit 14 in the axial direction. One adapter 20 is arranged correspondingly (see FIG. 1).

  As shown in FIG. 3, the adapter main body 22 is provided with an installation portion 28 where the holding member 26 is installed. The installation portion 28 includes a support portion 30 that supports the holding member 26 so as to be movable and rotatable, an outer accommodation portion 32 that can accommodate an outer end (other end) of the holding member 26, and an inner end (one end) of the holding member 26. And an inner housing portion 34 capable of housing the housing. The support portion 30 is formed in a hole shape that penetrates the adapter main body 22 in the radial direction. One of the support portions 30 opens on the outer peripheral surface side of the adapter main body 22 and the other opens on the shaft hole 24 side. The outer housing portion 32 is formed in a concave shape that is recessed inward from the outer peripheral surface of the adapter main body 22, and the support portion 30 is open at the bottom portion. The outer housing portion 32 defines an outer opening of the installation portion 28 that opens to the outer peripheral surface of the adapter main body 22. In the installation portion 28, the support portion 30 and the outer accommodation portion 32 communicate with each other in the moving direction of the holding member 26, and the support portion 30 and the outer accommodation portion 32 are surrounded by the adapter main body 22 and penetrate the shaft hole 24. It is formed in a shape that does not open. The installation portion 28 is formed such that the opening size of the outer receiving portion 32 is larger than the opening size of the support portion 30, and the bottom portion extending so as to intersect the moving direction of the holding member 26 in the outer receiving portion 32 is held by By engaging with the outer end of the member 26, the inward movement of the holding member 26 is restricted. The inner housing portion 34 is provided so as to communicate with the support portion 30 and the shaft hole 24, and is formed so as to open to both sides of the shaft hole 24 in the penetrating direction. Further, the inner accommodating portion 34 has a width in the circumferential direction larger than the distal end width of the locking member 16, and can receive the distal end of the locking member 16 at a position protruding from the outer peripheral surface of the winding unit 14. It is configured.

  As shown in FIG. 3, the holding member 26 includes a contact portion 38 formed in a disk shape extending in a direction intersecting the moving direction of the holding member 26 at the outer end of the cylindrical shaft portion 36. The adapter main body 22 is arranged in accordance with the locking member 16. In the adapter 20 of the embodiment, three adapter members 16 spaced apart at the same interval in the circumferential direction of the adapter main body 22 corresponding to the three locking members 16 provided at the same interval (120 ° interval) in the circumferential direction. The holding member 26 is arranged. Further, the holding member 26 is configured to be movable in a direction that matches the moving direction of the locking member 16, and is supported by the installation portion 28 so as to be movable in the radial direction in accordance with the locking member 16 that moves in the radial direction. Has been. In the holding member 26, the shaft portion 36 inserted through the support portion 30 of the installation portion 28 is held by the support portion 30, and the abutting portion 38 disposed outside the support portion 30 is removed via the outer housing portion 32. And the inner end of the shaft portion 36 faces the shaft hole 24 side through the inner accommodating portion 34. The holding member 26 is supported by the support portion 30 of the installation portion 28 in the shaft portion 36, and is allowed to move along the penetration direction of the support portion 30, and can be rotated in both forward and reverse directions using the support portion 30 as a bearing. It has become. The holding member 26 has a first position where the abutting portion 38 retracts inward from the outer peripheral surface of the adapter main body 22 and the inner end of the shaft portion 36 faces the shaft hole 24, and the abutting portion 38 is the adapter main body 22. It protrudes outward from the outer peripheral surface and is movable at least between the second position where the inner end of the shaft portion 36 is retracted from the shaft hole 24.

  As shown in FIG. 3, the holding member 26 is urged inward by the urging means 40, and in the embodiment, the urging means 40 using an elastic member such as a spring is applied to the holding member 26. Thus, a force is elastically applied in the direction of moving from the second position to the first position. The holding member 26 has an inner end of the shaft portion 36 at a first position where the inward movement is restricted by the contact portion 38 received in the outer housing portion 32 being caught by the bottom portion of the outer housing portion 32. It arrange | positions so that it may protrude in the shaft hole 24 inward.

  The adapter 20 is in the second posture rotated from the first posture while the opening shape of the outer housing portion 32 of the installation portion 28 allows the contact portion 38 of the holding member 26 in the first posture to be accommodated. It is configured to restrict the passage of the abutting portion 38 of the holding member 26. Accordingly, the holding member 26 is allowed to move between the first position and the second position when the holding member 26 is in the first posture, and when the holding member 26 is in the second posture, the abutting portion 38 is accommodated outside the installation portion 28. The movement toward the first position from the second position is restricted by being caught by the opening edge of the portion 32.

  As shown in FIGS. 3 to 8, the fixing means 42 includes an engaging portion 44 provided in the adapter main body 22 so as to define a part of the shaft hole 24, and a holding portion 48 provided in the adapter main body 22. And a pressing portion 46 configured to be movable forward and backward with respect to the engaging portion 44. One fixing means 42 according to the embodiment is arranged at the center of two holding members 26, 26 adjacent in the circumferential direction, and one fixing means 42 is provided on the adapter 20. The fixing means 42 pushes the engaging portion 44 configured to be deformable in the radial direction of the adapter body 22 with the pressing portion 46 toward the winding shaft 10 fitted in the shaft hole 24, thereby winding the engaging portion 44. The adapter 20 is fixed to the take-up shaft 10 as a fixed state pressed against the take-up shaft 10. Further, the fixing means 42 allows the adapter 20 to be attached to and detached from the winding shaft 10 in a released state in which the pressing portion 46 releases the pressing of the engaging portion 44 to the winding shaft 10.

  As shown in FIG. 3 and FIG. 5 to FIG. 8, the engaging portion 44 is provided between an opening portion 50 formed so as to open on at least one of the end surfaces of the adapter main body 22 and the shaft hole 24. This is a portion where the inner peripheral portion surrounding the shaft hole 24 in the main body 22 is thinned. The opening 50 of the embodiment penetrates so as to open at both end faces of the adapter main body 22, and has a long hole shape in which the length extends in the circumferential direction along the inner peripheral portion of the adapter main body 22 extending in an arc shape. Is formed. The opening 50 is provided at a position close to the shaft hole 24 in the radial direction of the adapter main body 22. The engaging portion 44 has an inner peripheral surface that defines a part of the shaft hole 24 in the adapter body 22 and is thinned as described above, so that the adapter body 22 can be elastically deformed radially inward and outward. It has become. The engaging portion 44 is in the released state of the fixing means 42, and the inner peripheral surface is located at the same outer diameter surface of the winding shaft 10 fitted in the shaft hole 24 or radially outward from the outer peripheral surface. The winding shaft 10 is not interfered with the attachment / detachment of the winding shaft 10. The engaging portion 44 can be deformed so that the inner peripheral surface is positioned radially inward from the outer peripheral surface of the winding shaft 10 that fits in the shaft hole 24, and is fixed to the shaft hole 24 when the fixing means 42 is fixed. It strongly interferes with the outer peripheral surface of the fitted winding shaft 10.

  As shown in FIGS. 3, 4, and 7, the pressing portion 46 is installed through a through hole 52 formed in the adapter body 22, can move inward and outward in the radial direction, and can rotate about itself. Is retained. The through hole 52 of the embodiment is formed so as to penetrate between the opening 50 and the outer peripheral surface of the adapter body 22 and extend in the radial direction of the adapter body 22. As the pressing portion 46, it is preferable to use a rod-like body having a spiral groove in the whole or a partial range of the peripheral surface, such as a screw, a bolt, or a screw. The pressing portion 46 of the embodiment uses a set screw whose head portion and screw portion have the same size. In addition, although the press part 46 of an Example uses what is called a "hexagon socket set screw" with a hexagonal hole in the head among the set screws, a "+" shape or " It may have a “−” shaped groove or the like. The pressing portion 46 has an end (inner end) that protrudes from the opening 50 and faces the outer peripheral surface of the engaging portion 44, and a head (outer end) that is on the outer peripheral surface of the adapter main body 22 in the through hole 52. It faces the outside of the adapter main body 22 from the opening 52a. The pressing portion 46 can rotate the head by inserting a tool such as a hexagon wrench through an operation opening 52 a that opens on the outer peripheral surface of the adapter body 22.

  As shown in FIGS. 3, 4, and 7, the holding portion 48 holds the pressing portion 46 so as to be movable inward and outward in the radial direction of the adapter main body 22, and engages portion 44 except when the pressing portion 46 is operated. It is comprised so that the advancing / retreating movement of the press part 46 with respect to may be controlled. The holding portion 48 is located in the middle of the through hole 52 and is fitted into an attachment portion 54 formed on the adapter main body 22 so as to be immovable in the radial direction inside and outside of the adapter main body 22 and in the circumferential direction. The holding portion 48 of the embodiment is a substantially rectangular plate-like body having a screw hole 48 a that is fastened to the screw portion of the pressing portion 46, and the screw hole 48 a is aligned with the through hole 52 when installed in the attachment portion 54. It is supposed to be. The attachment portion 54 is formed in a groove shape that opens on one end surface of the adapter main body 22 and closes the other end surface, and is provided side by side on the radially outer side of the opening portion 50.

  As shown in FIGS. 3 and 4, the fixing means 42 is installed by screwing the pressing portion 46 inserted into the through hole 52 from the operation opening 52 a into the screw hole 48 a of the holding portion 48 fitted in the mounting portion 54. Yes. The fixing means 42 rotates the pressing portion 46 screwed into the screw hole 48 a of the holding portion 48 that is restricted from moving relative to the adapter main body 22, so that the pressing portion 46 moves forward and backward with respect to the engaging portion 44. Here, the fixing means 42 can be rotated so as to be moved forward and backward with respect to the engaging portion 44 in the pressing portion 46 via an operation opening 52 a that opens on the outer peripheral surface of the adapter main body 22. In addition, the fastening means 42 is restricted from moving forward and backward with respect to the engaging portion 44 except when the pressing portion 46 is rotated by screw fastening between the pressing portion 46 and the holding portion 48.

  As shown in FIGS. 3 and 4, the operation opening 52 a is formed in the outer peripheral surface of the adapter body 22 so as to match the outer diameter of the pressing portion 46. More specifically, a cylindrical set screw is used as the pressing portion 46, and the head portion is not an umbrella-like shape extending in the radial direction, so that the through hole 52 extends from the operation opening 52a to the opening portion 50. It is formed with the same diameter throughout.

(Effects of Example)
Next, the operation of the adapter 20 according to the embodiment will be described. When the adapter 20 is attached to or removed from the take-up shaft 10, the holding member 26 is placed in the second position at the second position, so that the holding member 26 is hooked on the opening edge of the installation portion 28. Hold in 2 positions. Since the adapter 20 holds the holding member 26 in the second position, the inner end of the shaft portion 36 of the holding member 26 is retracted from the shaft hole 24 and received in the inner receiving portion 34. Interference between the locking member 16 provided on the winding shaft 10 and the holding member 26 can be avoided. At this time, the fixing means 42 is in a released state in which the pressing of the engaging portion 44 by the pressing portion 46 is released. According to the adapter 20, the adapter 20 can be smoothly attached to and detached from the take-up shaft 10, and the diameter of the take-up shaft 10 can be easily changed according to the winding core by the adapter 20. Moreover, since the configuration of the adapter 20 is simpler than that of the winding shaft 10, it is possible to reduce the cost compared to preparing a plurality of types of winding shafts 10 or winding units 14 according to the diameter of the winding core. Since the configuration is simple, an increase in weight can be suppressed.

  The adapter 20 rotates the holding member 26 in the second position from the second posture to the first posture, so that the hook with the opening edge of the installation portion 28 is eliminated and the adapter 20 is pulled by the biasing means 40. The holding member 26 moves from the second position toward the first position. As a result, the holding member 26 is in a state where the inner end of the shaft portion 36 is in contact with the tip of the locking member 16. Then, the pressing portion 46 of the fixing means 42 is rotated by a tool inserted through the operation opening 52a, and the engaging portion 44 is pressed by the pressing portion 46 to deform the engaging portion 44 inward in the radial direction. The adapter 20 is fixed to the winding shaft 10 so as not to move and rotate by causing the joint portion 44 to strongly interfere with the outer peripheral surface of the winding shaft.

  In the adapter 20, as the locking member 16 protrudes outward, the holding member 26 moves outward against the urging force of the urging means 40 (FIG. 9B). As a result, the core attached to the adapter 20 is pressed from the inside by the contact portion 38 protruding outward. As the locking member 16 is retracted inward, the adapter 20 moves the holding member 26 inward by the urging force of the urging means 40 (FIG. 9A). The core attached to is in a free state with respect to the adapter 20. Thus, in the normal state in which the holding member 26 is in the first posture, the adapter 20 moves the holding member 26 in conjunction with the movement of the locking member 16, and fixes the core to the winding shaft 10. Unpin. In this way, the adapter 20 can move the holding member 26 in conjunction with the locking member 16 by a simple operation that simply rotates the holding member 26.

  The adapter 20 is simply fixed to the winding shaft 10 by pressing the engaging portion 44 defining the shaft hole 24 in the adapter main body 22 with the pressing portion 46 against the winding shaft 10 fitted in the shaft hole 24. can do. Further, since the engaging portion 44 that defines the shaft hole 24 in the adapter main body 22 is configured to be pressed and deformed by the pressing portion 46, when the adapter 20 is attached to the winding shaft 10, the inner peripheral surface of the winding core It is possible to prevent the outer periphery of the adapter 20 opposite to the deformation.

  For example, as a fixing means (referred to as a fixing means of a reference example), a groove formed so as to be cut out from the shaft hole 24 toward the outer peripheral surface of the adapter main body 22 is provided in the adapter main body 22 and intersects with this groove. A configuration is also conceivable in which a bolt is installed as described above and the width of the groove is expanded by rotating the bolt. The fixing means of the reference example reduces the diameter of the shaft hole 24 by reducing the width of the groove with a bolt, and fastens and fixes the winding shaft 10 fitted in the shaft hole 24. With such a fixing means of the reference example, when the width of the groove is narrowed by a bolt, deformation occurs such that the outer peripheral surface of the adapter body 22 swells. If the outer peripheral surface of the adapter main body 22 is deformed, there is a problem that a winding core attached to the adapter 20 is shifted, and as a result, there is a possibility that a sheet or the like is poorly wound.

  According to the fixing means 42 of the embodiment, since the engaging portion 44 provided in the adapter main body 22 is configured to be deformed radially inward, the engaging portion 44 that defines a part of the shaft hole 24 is partially provided. Only the deformation does not affect the entire adapter body 22 as in the fixing means of the reference example. That is, the fixing means 42 of the embodiment can avoid the deformation of the outer peripheral surface of the adapter main body 22 due to the deformation of the engaging portion 44, and when the winding core is attached to the adapter 20, problems such as a misalignment occur. Can be prevented. In particular, the fixing means 42 is provided with an engaging portion 44 between the opening 50 formed so as to open at both end faces of the adapter main body 22 and the shaft hole 24, so that the engaging portion 44 is deformed. In addition, the presence of the opening 50 on the radially outer side of the engaging portion 44 can make it more difficult to adversely affect the outer peripheral surface of the adapter main body 22. In addition, with a simple configuration in which the inner peripheral portion surrounding the shaft hole 24 in the adapter main body 22 is a thinned portion, the adverse effect on the outer peripheral surface of the adapter main body 22 is small, and strong interference with the winding shaft 10 can be achieved. A deforming engagement portion 44 can be provided.

  The fixing means 42 has a simple configuration for holding the pressing portion 46 to the holding portion 48 by screw fastening, and by rotating the pressing portion 46 via the operation opening 52a that opens to the outer peripheral surface of the adapter body 22, The pressing portion 46 can be moved back and forth with respect to the engaging portion 44. The fixing means 42 has a simple configuration in which the pressing portion 46 is held on the holding portion 48 by screw fastening, and can be pressed by the pressing portion 46 to press the engaging portion 44 against the take-up shaft 10. The state where 44 is pressed against the winding shaft 10 can be maintained.

  Since the fixing means 42 uses a set screw whose head does not extend like an umbrella as the pressing portion 46, the opening diameter of the through hole 52 can be reduced. Since the adapter 20 is formed with an operation opening 52a that drills in the outer peripheral surface of the adapter main body 22 in the through hole 52 in accordance with the pressing portion 46 that is a set screw, the operation opening 52a drilled in the outer peripheral surface of the adapter main body 22 is formed. Can be minimized. The adapter 20 needs to be provided with an opening in the adapter body 22 in order to install or operate the pressing portion 46 in the adapter body 22. The fixing means 42 of the embodiment minimizes the size of the operation opening 52a, so that the rigidity of the adapter main body 22 is maintained and the outer peripheral surface of the adapter main body 22 is deformed due to the deformation of the engaging portion 44. It can prevent more suitably.

(Example of change)
The present invention is not limited to the configuration described above, and can be modified as follows, for example. In the modified examples shown in FIGS. 10 to 13, the same reference numerals as those in the embodiment may be attached to the same configurations as those in the embodiment, and the description thereof may be omitted.

(1) In the embodiment, the set screw is used as the pressing portion. However, the present invention is not limited to this, and a male screw having a head portion such as a bolt or a screw protruding in an umbrella shape may be used. Moreover, you may use what has internal threads, such as a nut, as a holding | maintenance part. For example, the fixing means 60 of the first modification shown in FIGS. 10 and 11 uses a bolt (more specifically, a cap bolt) as the pressing portion 46 and uses a nut as the holding portion 48. In the fixing means 60 of the first modification, the pressing portion 46 passed through the through hole 52 from the operation opening 52a is screwed to the holding portion 48 fitted in the mounting portion 54, and the pressing portion 46 is rotated via the operation opening 52a. By operating, the pressing portion 46 moves forward and backward to the engaging portion 44. The fixing means 60 of the first modified example has a demerit that the operation opening 52a becomes larger than that of the embodiment, but the other effects are the same as those of the embodiment.

(2) In the embodiment, by providing openings that are open on both end faces of the adapter main body, the inner peripheral portion of the adapter main body is thinned to provide the engaging portion. It is good also as a groove shape which opens to the one end surface of this, and obstruct | occludes the other end surface of an adapter main body, and is good also as an engaging part between a groove-shaped opening part and a shaft hole. Further, in the embodiment, the engaging portion is pushed inward in the radial direction by the pressing portion provided so as to move in the radial direction of the adapter body, but not limited thereto, the axial direction of the winding shaft (shaft hole) The engaging portion may be pushed radially inward by a pressing portion that is provided so as to move in the (penetrating direction) direction. For example, the fixing means 62 of Modification 2 shown in FIGS. 12 and 13 includes an opening 66 formed in a groove shape extending in an arc shape from the inner peripheral surface (shaft hole 24) of the adapter body 22 to the inner peripheral surface. The inside is a thinned engaging portion 64. Further, in the fixing means 62 of the second modification, the pressing portion 68 made of a screw is screwed in the axial direction into the opening 66 (between the engaging portion 64 and the wall of the adapter main body 22 facing the opening 66). Then, when the pressing portion 68 is screwed into the adapter main body 22, the pressing portion 68 functions as a wedge, and the engaging portion 64 is pressed radially inward. The pressing portion 68 is held by a holding portion 70 made of a nut installed on the opposite side of the pressing portion 68 from the insertion side. Then, the engaging portion 64 pressed by the pressing portion 68 is pressed against the winding shaft 10 fitted in the shaft hole 24. The fixing means 62 of the modified example 2 has the demerit that it is difficult to increase the deformation amount of the engaging portion as compared with the example and the modified example 1, but the other effects are the same as those of the example. The configuration of the engaging portion 64 of the fixing means 62 of the second modification may be applied to the configuration of the pressing portion that is held so as to be movable in the radial direction as in the first embodiment or the first modification.

(3) In the embodiment and the modified example, one fixing means is provided. However, the present invention is not limited to this, and the fixing means may be provided in a plurality of locations.
(4) The opening or the engaging portion defined by the opening is not limited to the shape of the embodiment and the modified example, and may be other shapes as long as the engaging portion defining the shaft hole can be deformed. Also good.
(5) The holding portion is not limited to the configuration in which the holding portion is provided separately from the adapter main body. For example, the holding portion may be formed integrally with the adapter main body by providing a female screw on the adapter main body.

10 winding shaft, 22 adapter body, 24 shaft hole, 44 engaging part, 46 pressing part,
48 holding part, 48a screw hole, 50 opening part, 52a operation opening

Claims (4)

An adapter body provided so that a shaft hole into which the winding shaft is fitted penetrates both end surfaces;
An engagement portion provided to define the shaft hole in the adapter body, and configured to be deformable in a radial direction of the adapter body;
The engaging portion is held by the holding portion provided in the adapter main body so as to be movable inward and outward in the radial direction of the adapter main body, and the engaging portion is pushed toward the winding shaft fitted in the shaft hole. And a pressing portion that presses the winding shaft against the winding shaft.   The pressing portion can be operated to move forward and backward with respect to the engaging portion through an operation opening that opens in the adapter main body, and the engaging portion is engaged by the holding portion except when the pressing portion is operated. The adapter according to claim 1, wherein forward / backward movement relative to the joint is restricted. The pressing portion is a set screw that moves inward and outward in the radial direction of the adapter body by a rotation operation through the operation opening,
The holding portion is provided so as not to move inward and outward in the radial direction of the adapter body with respect to the adapter body, and has a screw hole into which the pressing portion can be screwed.
The adapter according to claim 2, wherein the operation opening is formed in the outer peripheral surface of the adapter main body so as to match the outer diameter of the pressing portion.   The engaging portion is provided between an opening formed to open at least one end surface of the adapter main body and the shaft hole, and an inner peripheral portion surrounding the shaft hole in the adapter main body is thinned. The adapter according to any one of claims 1 to 3, wherein the adapter is a part that has been cut.