JP3214223U - Core support shaft - Google Patents

Abstract

A core support shaft capable of reducing the interval between adjacent projecting members in the axial direction is provided. A winding core support shaft includes a shaft main body, a pipe, and a projecting mechanism, and supports the winding core from the inside. The protruding mechanism 3 moves in the radial direction in accordance with the movement of the piston 32 in the axial direction, the compression spring 33 that urges the piston 32 in one axial direction, and the piston 32 in the cylinder 31. Projecting member 34. In the cylinder 31, the end surface 311 restricts movement of the piston 32 in one axial direction. The piston 32 moves to the other side in the axial direction against the urging force of the compression coil spring 33 when air is supplied from the pipe 2. The protruding member 34 is retracted with respect to the outer peripheral surface 1a of the shaft body 1 when the piston 32 is disposed on one side in the axial direction, and the outer peripheral surface 1a when the piston 32 is moved to the other side in the axial direction. Protruding against. [Selection] Figure 1

Description

  The present invention relates to a core support shaft.

  Conventionally, a core support shaft that supports a cylindrical core from the inside is known (for example, see Patent Document 1).

  The core support shaft includes a cylindrical shaft main body, a pipe for supplying air, and a plurality of protrusion mechanisms provided along the axial direction of the shaft main body. The protruding mechanism includes a movable member that is movable in the axial direction, a compression coil spring that biases the movable member toward one side in the axial direction, and a protruding member that moves in the radial direction in accordance with the movement of the movable member in the axial direction. Is included. The movable member is configured to move to the other side in the axial direction against the biasing force of the compression coil spring when air is supplied from the pipe. The protruding member is retracted from the outer peripheral surface of the shaft body when the movable member is arranged on one side in the axial direction, and the outer periphery of the shaft main body when the movable member is moved to the other side in the axial direction. It is designed to protrude from the surface. The core support shaft is configured to support the core fitted to the shaft body from the inside by projecting a projecting member from the outer peripheral surface of the shaft body.

Registered Utility Model No. 3201221

  Here, the movable member has a concave portion at one end in the axial direction, and a stopper is provided in the concave portion. For this reason, when the movable member is in contact with the stopper, one end portion of the movable member protrudes to one side in the axial direction from the stopper, so that a space for releasing the one end portion of the movable member is provided. It must be secured in the shaft body. Therefore, there is a problem that the interval between adjacent protruding members in the axial direction is increased.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a core support shaft capable of reducing the interval between adjacent projecting members in the axial direction. .

  A core support shaft according to the present invention includes a shaft body formed in a cylindrical shape, a pipe for supplying air provided inside the shaft body, and a plurality of protrusion mechanisms provided along the axial direction of the shaft body. And is configured to support the core fitted to the shaft body from the inside. The protruding mechanism includes a cylindrical cylinder, a piston that is accommodated in the cylinder and movable in the axial direction, a biasing member that biases the piston to one side in the axial direction, and a movement in the axial direction of the piston. And a projecting member that moves in the radial direction. The cylinder has an end surface on one side in the axial direction, and the end surface functions as a stopper that restricts movement of the piston in one side in the axial direction. The piston is configured to move to the other side in the axial direction against the urging force of the urging member when air is supplied from the pipe. The protruding member is retracted from the outer peripheral surface of the shaft body when the piston is disposed on one side in the axial direction, and is disposed on the outer peripheral surface of the shaft body when the piston is moved to the other side in the axial direction. It is comprised so that it may protrude with respect to.

  With this configuration, unlike the conventional core support shaft in which the piston is housed in the cylinder and the end surface of the cylinder functions as a stopper, the stopper is disposed in the concave portion of the movable member. Since it is not necessary to secure a space for escaping the end portion, the interval between the protruding members adjacent in the axial direction can be reduced.

  According to the core support shaft of the present invention, the interval between the protruding members adjacent in the axial direction can be reduced.

It is sectional drawing which cut | disconnected the core support shaft by this embodiment along the axial direction. It is AA sectional drawing of FIG. It is sectional drawing which showed the state which the protrusion member of the core support shaft of FIG. 1 protruded. It is BB sectional drawing of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

−Configuration−
First, with reference to FIG. 1 and FIG. 2, the structure of the core support shaft 100 by one Embodiment of this invention is demonstrated.

  The core support shaft 100 is configured to support (hold) a cylindrical core 150 (see FIG. 3) from the inside. For example, a plurality of cores 150 are fitted in the core support shaft 100 in the axial direction (X1 and X2 directions), and the plurality of cores 150 can be supported by the core support shaft 100. Then, by rotating the core support shaft 100 that supports the core 150, a sheet-like article (not shown) is wound around the core 150, or the sheet-like article is fed out from the core 150. ing.

  As shown in FIG. 1, the core support shaft 100 includes a shaft body 1, an air supply pipe 2, and a plurality of projecting mechanisms 3.

  The shaft body 1 is an exterior member, and is formed in a cylindrical shape and extends in the axial direction. Inside the shaft main body 1, a pipe 2 and a protruding mechanism 3 are arranged. An opening 11 that penetrates in the radial direction is formed in the shaft body 1, and a lug 341 described later is disposed in the opening 11. A plurality of openings 11 are provided at predetermined intervals in the axial direction and the circumferential direction. Further, the shaft body 1 can be connected to a driving device (not shown) at one end in the axial direction, and is rotated by the driving device. Note that the other end of the shaft body 1 in the axial direction may be rotatably supported or may not be supported. That is, the core support shaft 100 may have a both-end support structure or a cantilever structure.

  The pipe 2 is provided for supplying air for operating the protruding mechanism 3. The pipe 2 is disposed in the center of the shaft body 1 and is formed to extend in the axial direction. A plurality of air supply holes 21 are formed in the pipe 2 at predetermined intervals in the axial direction and the circumferential direction. The pipe 2 is connected to an air supply source (not shown).

  A plurality of the projecting mechanisms 3 are provided along the axial direction, and are configured to advance and retract the lugs 341 with respect to the outer peripheral surface 1 a of the shaft body 1. The protruding mechanism 3 includes a cylinder 31, a piston 32, a compression coil spring 33, a protruding member 34, and a stopper 35. The compression coil spring 33 is an example of the “biasing member” of the present invention.

  The cylinder 31 is disposed between the shaft body 1 and the pipe 2 and is provided to accommodate the piston 32. The cylinder 31 is formed in a cylindrical shape, has an end surface 311 on one axial side (X1 direction side), and is open on the other axial side (X2 direction side). A pipe insertion hole 311 a into which the pipe 2 is inserted is formed at the center of the end surface 311. The cylinder 31 is fixed to the shaft body 1 and the pipe 2.

  The piston 32 is configured such that one side in the axial direction is accommodated in the cylinder 31 and is movable in the axial direction. The piston 32 is provided so as not to rotate with respect to the shaft body 1 and the pipe 2. The piston 32 is formed in a cylindrical shape, and the pipe 2 is disposed in an internal hollow portion 32a. The movement of the piston 32 to one side (X1 direction) in the axial direction is restricted by the end surface 311 of the cylinder 31, and the movement to the other side (X2 direction side) in the axial direction is restricted by the stopper 35. ing. That is, the end surface 311 functions as a stopper that restricts the movement of the piston 32.

  A guide groove 321 is formed on the other side of the piston 32 in the axial direction, and a protruding member 34 is disposed in the guide groove 321. The guide groove 321 is formed so as to extend along the axial direction, and is formed so that the depth gradually increases from one side to the other side. That is, the guide groove 321 has a bottom surface 321a that is inclined in the radial direction with respect to the axial direction. Steps are formed on both side surfaces of the guide groove 321 in the vicinity of the bottom surface 321a, and wide portions 321b (see FIG. 2) are formed in the vicinity of the bottom surface 321a of the guide groove 321. A plurality (three in this embodiment) of guide grooves 321 are provided at a predetermined interval in the circumferential direction.

  The piston 32 has a bottomed hole 322 having a circular cross section on the other end face in the axial direction, and a compression coil spring 33 is disposed in the bottomed hole 322. A plurality (three in this embodiment) of the bottomed holes 322 (see FIG. 2) are provided at predetermined intervals in the circumferential direction, and are alternately arranged with the guide grooves 321.

  Further, the piston 32 has a recess 323 formed on one end face in the axial direction. The recess 323 is formed in an annular shape so as to surround the periphery of the pipe 2 when viewed from the axial direction. A pneumatic chamber 36 to which air is supplied is defined by the concave portion 323 of the piston 32, the cylinder 31, and the pipe 2. The pneumatic chamber 36 communicates with an air supply source (not shown) via the air supply hole 21 and the like.

  The compression coil spring 33 is disposed in the bottomed hole 322 and is disposed between the piston 32 and the stopper 35. For this reason, the compression coil spring 33 is configured to urge the piston 32 toward one side (X1 direction side) in the axial direction.

  The protruding member 34 is configured to move in the radial direction in accordance with the movement of the piston 32 in the axial direction. For this reason, when the piston 32 is arranged on one side in the axial direction, the protruding member 34 is retracted with respect to the outer peripheral surface 1a of the shaft body 1 and the piston 32 is moved to the other side in the axial direction. Further, the shaft body 1 is configured to protrude with respect to the outer peripheral surface 1a. Further, a plurality (three in this embodiment) of the protruding members 34 are provided at a predetermined interval in the circumferential direction.

  Specifically, the projecting member 34 includes a lug 341 disposed in the opening 11 of the shaft body 1 and a sliding metal fitting 342 inserted into the guide groove 321 of the piston 32. The lug 341 is bolted to the top of the metal fitting 342. A pressing surface 341 a that can press the inner surface of the core 150 is provided on the top of the lug 341. The metal fitting 342 has an inclined surface 342a at the bottom. The inclined surface 342a is formed to be inclined in the radial direction with respect to the axial direction, and is formed to correspond to the bottom surface 321a of the guide groove 321. Further, an engaging protrusion 342b (see FIG. 2) is formed near the bottom of the side surface of the metal fitting 342. The engaging protrusion 342b is fitted into the wide portion 321b of the guide groove 321 so that the protruding member 34 is prevented from falling off the opening 11.

  The stopper 35 is formed in an annular shape and is fixed to the shaft body 1 and the pipe 2. The stopper 35 is disposed on the other side in the axial direction with respect to the piston 32. In the adjacent protrusion mechanism 3, the end surface 311 of the cylinder 31 of one protrusion mechanism 3 and the stopper 35 of the other protrusion mechanism 3 are provided adjacent to each other.

-Operation-
Next, with reference to FIGS. 1-4, operation | movement of the core support shaft 100 by this embodiment is demonstrated.

  First, when the lug is retracted as shown in FIGS. 1 and 2, the piston 32 is arranged on one side (X1 direction side) by the urging force of the compression coil spring 33, and the piston 32 is brought into contact with the end surface 311 of the cylinder 31. Yes. For this reason, in each projecting mechanism 3, the lug 341 of the projecting member 34 is retracted from the outer peripheral surface 1 a of the shaft body 1.

  When a cylindrical core 150 (see FIGS. 3 and 4) is fitted to the shaft body 1 and air is supplied to the pipe 2 from an air supply source (not shown), the pneumatic chamber is connected via the air supply hole 21. Air is supplied to 36. Thereby, as shown in FIGS. 3 and 4, the piston 32 is moved to the other side (X2 direction side) against the urging force of the compression coil spring 33. At this time, the protruding member 34 moves outward in the radial direction in accordance with the movement of the piston 32 in the axial direction. Specifically, as the piston 32 moves, the protruding member 34 is pushed out in the radial direction as the bottom surface 321a of the guide groove 321 contacting the inclined surface 342a of the metal fitting 342 becomes shallower. For this reason, the lug 341 of the projecting member 34 projects from the outer peripheral surface 1 a of the shaft body 1, and the inner surface of the core 150 is pressed by the pressing surface 341 a of the lug 341. In this way, the core 150 is supported by the core support shaft 100.

  Here, when the piston 32 is moved to the other side, the pressing surface 341a of the lug 341 presses the winding core 150 and the movement of the lug 341 is restricted before the piston 32 contacts the stopper 35. Thus, the movement of the piston 32 to the other side is stopped. As a result, even if the inner diameter of the winding core 150 varies, it is possible to support the winding core 150 by each protruding mechanism 3.

  Thereafter, when the core 150 is removed from the core support shaft 100, the air in the pneumatic chamber 36 is discharged through the pipe 2. For this reason, the piston 32 is moved to one side (X1 direction side) by the biasing force of the compression coil spring 33, and the piston 32 comes into contact with the end surface 311 of the cylinder 31. At this time, the protruding member 34 moves inward in the radial direction in accordance with the movement of the piston 32 in the axial direction. Specifically, as the piston 32 moves, the protruding member 34 is drawn in the radial direction as the bottom surface 321a of the guide groove 321 that contacts the inclined surface 342a of the metal fitting 342 becomes deeper. For this reason, the lug 341 is retracted from the outer peripheral surface 1a of the shaft body 1, and the press of the core 150 by the lug 341 is released. In this way, the core 150 is removed from the core support shaft 100.

-Effect-
In the present embodiment, as described above, the cylinder 31 that accommodates the piston 32 is provided, and the end surface 311 of the cylinder 31 functions as a stopper, whereby the stopper is disposed in the concave portion of the movable member. Unlike the shaft, there is no need to secure a space for releasing one end of the movable member. As a result, the end surface 311 of the cylinder 31 of the predetermined protruding mechanism 3 can be disposed adjacent to the stopper 35 of the protruding mechanism 3 adjacent to the predetermined protruding mechanism 3, and thus the protruding member 34 adjacent in the axial direction. Can be reduced. As a result, the holding strength per length in the axial direction of the core support shaft 100 can be improved.

  In the present embodiment, the projecting member 34 is engaged with the piston 32, and the compression coil spring 33 urges the piston 32 to one side in the axial direction so that the movable member is moved by the leaf spring provided on the projecting member. The durability can be improved as compared with a conventional core support shaft that is biased to one side in the axial direction.

  Further, in the present embodiment, by operating each protrusion mechanism 3 individually with air, each protrusion mechanism 3 protrudes according to the inner diameter of the core 150, so that variations in the inner diameter of the core 150 are absorbed. Can be held properly.

-Other embodiments-
In addition, embodiment disclosed this time is an illustration in all the points, Comprising: It does not become a basis of limited interpretation. Therefore, the technical scope of the present invention is not interpreted only by the above-described embodiments, but is defined based on the description of the scope of claims for utility model registration. In addition, the technical scope of the present invention includes all modifications within the meaning and scope equivalent to the scope of claims for utility model registration.

  For example, in the present embodiment, a rolling element (not shown) may be provided between the bottom surface 321a of the guide groove 321 and the inclined surface 342a of the protruding member 34.

DESCRIPTION OF SYMBOLS 1 Shaft body 1a Outer peripheral surface 2 Pipe 3 Protrusion mechanism 31 Cylinder 32 Piston 33 Compression coil spring (biasing member)
34 Projection member 100 Core support shaft 150 Core 311 End face

Claims (1)

A shaft body formed in a cylindrical shape;
A pipe provided inside the shaft body for supplying air;
A plurality of protrusion mechanisms provided along the axial direction of the shaft body,
A core support shaft configured to support the core fitted to the shaft body from the inside;
The protruding mechanism includes a cylindrical cylinder, a piston that is accommodated in the cylinder and movable in the axial direction, a biasing member that biases the piston toward one side in the axial direction, and an axial direction of the piston. A projecting member that moves in the radial direction in accordance with the movement of
The cylinder has an end surface on one side in the axial direction, and the end surface is configured to function as a stopper that restricts movement of the piston to one side in the axial direction.
The piston is configured to move to the other side in the axial direction against the biasing force of the biasing member when air is supplied from the pipe.
The projecting member is retracted from the outer peripheral surface of the shaft body when the piston is arranged on one side in the axial direction, and the shaft is moved when the piston is moved to the other side in the axial direction. A core support shaft characterized by being configured to protrude with respect to the outer peripheral surface of the main body.

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