JPH048127Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> This invention relates to a core mounting shaft in a winding manufacturing device for paper, other thin film-like elongated materials.

<Prior art> As is well known, when manufacturing toilet paper, wraps, aluminum foil, etc., a large diameter roll is used as a base material, and a specified length is wound around a cylindrical core made of cardboard or the like. It is produced by taking it. Therefore, when installing the above-mentioned core in a winding manufacturing device, the core mounting shaft is removed from the winding manufacturing device, the core is fitted onto the core mounting shaft, and both ends of the core are connected to a collar having an end face having a larger diameter than the core. The core and the core mounting shaft are integrated by sandwiching the collar member between the members and fixing the collar member to the core mounting shaft with screws or pins. Then, the core mounting shaft with the core fitted thereon is set in the winding manufacturing device, and once the device is driven to wind the specified length, the core mounting shaft is removed from the device,
Loosen the screws and pins, remove the collar member, and remove the core after winding from the core mounting shaft.
A new core is fitted onto the core mounting shaft, both ends of the core are again sandwiched between the collar members, and the core is fixed onto the core mounting shaft again with screws and pins. Then, the core mounting shaft to which this core is fixed is again set in the winding manufacturing device.

<Problem to be solved by the invention> Therefore, in order to attach the core to the core attachment shaft in a conventional winding manufacturing device, the collar member must be fixed to the core attachment shaft each time with screws or pins. Moreover, even when removing the core after winding, the core cannot be attached or detached unless the screws and pins are loosened and the collar member is removed. Therefore, it takes time to attach and detach the core, and work efficiency is extremely poor.

<Means for Solving the Problems> The present invention was devised in view of the above, and includes inserting a shaft into the core, sandwiching both end faces of the core with a collar member having a boss on the outer end face, and attaching the boss to the core. In a core mounting shaft that sets the core in the winding manufacturing device by being mounted on the mounting portion of the winding manufacturing device, a collar member having a flange surface is provided on one end side of the shaft body that can be inserted into the inside of the core, and the shaft A cap member having approximately the same diameter as the shaft body is provided at the other end of the main body, a boss is provided protruding from the outer end surface of the collar member, and a coil spring is attached inside the cap member outwardly along the shaft center. A slide member to be pushed is slidably accommodated, and the outer end of the slide member is made to protrude from the outer end surface of the cap member as a boss portion, and protrudes in the direction of the outer circumferential surface of the shaft between the cap member and the shaft body. A plurality of locking members are provided, and the locking members are biased in the diametrical direction by a biasing member, and the inner ends of the slide members are wedge-shaped at opposing intervals between the locking members, and the core When the mounting shaft is mounted on the winding manufacturing device, the sliding member is pressed in a direction that compresses the shaft by the mounting portion of the winding manufacturing device, and the inner end of the sliding member enters the opposing interval of the locking member. The locking member is pushed open and protrudes from the outer peripheral surface of the shaft, and the core inserted into the shaft body is sandwiched between the protruding locking member and the collar surface of the collar member.

<Function> With the above configuration, when the core mounting shaft is not set in the winding manufacturing device, the slide member is pressed outward along the axis by the coil spring, and the slide member is removed from between the locking members. Since the locking member is moved backward, the locking member, which is biased in the diametrical direction, does not protrude to the outer circumferential surface of the shaft. Therefore, the core can be freely attached to and detached from the shaft from the cap member side. Furthermore, when the core installation shaft with the core fitted therein is set in the winding manufacturing device, the sliding member is pressed inward along the shaft center by the mounting portion of the winding manufacturing device via the boss portion, so that the sliding member slides inward against the coil spring, pushes the locking member open in the radial direction at the inner end of the slide member, and the locking member projects onto the outer peripheral surface of the shaft. Therefore, the end of the core fitted to the shaft body is locked to the protruding locking member, and the core can be sandwiched between the collar surface and the collar surface. Then, when the core mounting shaft is removed from the winding manufacturing device, the pressure on the sliding member by the mounting section of the winding manufacturing device is released, so the sliding member moves outward and the locking member is inserted into the shaft body. Since it is recessed, there is no protrusion on the outer peripheral surface of the shaft.

<Example> Hereinafter, the present invention will be described with reference to an example shown in the drawings.

The core mounting shaft 1 according to the present invention has a collar member 3 having a fixed boss 4 on one end side of a cylindrical shaft body 2, and a cap member 7 on the other end side of the shaft body 2. A slide member 6 having a boss portion 5 is slidably housed in the cap member 7, and a base member 8 is interposed between the cap member 7 and the shaft body 2. A movable locking member 9 is provided, and the locking member 9
It is configured such that it can protrude from the outer peripheral surface of the shaft.

The shaft body 2 has a cylindrical shape, and is adapted to allow a core a to be attached to the outer periphery. A collar member 3 is fitted onto one end side of the shaft body 2. Collar member 3
has an outer diameter that is substantially the same as the outer diameter of the core a, and an inner diameter that is substantially the same as the outer diameter of the shaft body 2. Further, the collar member 3 closes one end of the shaft body 2. A flange surface 10 whose outer diameter rapidly increases is formed at the joint between the collar member 3 and the shaft body 2.
One end b of the core a comes into contact with this collar surface 10 when the core a is mounted on the core mounting shaft 1. A fixed boss 4 is provided protruding from the center of the closed end 3' of the collar member 3, and when the boss 4 is formed into a spline shaft, a D shaft, etc., the core mounting shaft 1 is set in a winding manufacturing device (not shown). At this time, the rotation of the device can be transmitted to the core mounting shaft 1.

A base member 8 is fitted onto the other end side of the shaft body 2. The base member 8 has a base portion 11 having a substantially drum-shaped cross section, and has a cross shape with a back plate portion 12 protruding from approximately the center of the base portion 11 in the radial direction. The outer surface of the base member 8 is formed into an arc shape so that it can be fitted into the shaft body 2, and the outer diameters of the base portion 11 and the back plate portion 12 match the inner diameter of the shaft body 2. The base member 8 also has a central hole 13 along its length. The back plate portion 12 is provided with a plate-shaped groove portion 14 that communicates with the central hole 13 from the outer surface. Then, the diameter of one outer wall portion perpendicular to the axis of the groove portion 14 is expanded to the outer diameter of the shaft body 2, and a flange piece 15 is provided.

Note that instead of opening the groove portion 14, the base member 8
It is also possible to divide the image in the vertical direction and combine the divided parts.

A locking member 9 is provided in the groove portion 14 of the base member 8.
Attach it so that it can rotate freely. The locking member 9 has an axe-like shape and includes a wide head 16 and an arm 17 extending from the head 16. Furthermore, a notch 18 is provided at the base of the arm 17. Locking member 9 as described above
are inserted vertically symmetrically into the groove 14, and the tips of the arms 17 are rotatably attached to the back plate 12 with pins 19 orthogonal to each other. Then, the notch 1
A spring 20 is wound around 8 as a biasing member that biases the locking member 9 in a direction to reduce the diameter. Therefore, the inner side 21 of the head 16 of the locking member 9 can protrude into the central hole 13, and the outer side 22 of the head 16 can be recessed into the back plate part 12 (see FIG. 2).

A cap member 7 is fitted onto the tip of the base member 8. The cap member 7 has approximately the same outer diameter as the shaft body 2, is open at one end, and is connected to the base member 8.
When fitted, the end 23 of the cap member 7 comes into contact with the flange piece 15 of the base member 8. In addition, the cap member 7
The other end is closed by a bottom plate 25 having a boss passage hole 24.

A slide member 6 is accommodated in the cap member 7. The slide member 6 has a flange portion 26 with an enlarged diameter in the middle portion, and a conical wedge portion 2 at the inner end.
7, and further has a boss portion 5 protruding from the passage hole 24 at the outer end. A coil spring 28 is wound between the slide member 6 and the base member 8 to bias the slide member 6 outward along the axis. This coil spring 28 is installed in a spring storage hole 29 which is provided by enlarging the tip of the center hole 13 of the base member 8.
It is preferable that the spring be stored in the spring 20 and spring between the inner surface 30 of the flange portion 26 of the slide member 6 and the inner end surface 31 of the spring storage hole 29. Therefore, in the normal state, the slide member 6 is urged outward by the coil spring 28, so that the flange portion 26
The outer surface 32 of the locking member 9 contacts the bottom plate 25 of the cap member 7, the boss portion 5 protrudes from the cap member 7, and the wedge portion 27 faces the opposing interval of the inner side 21 of the head portion 16 of the locking member 9. (Figure 2).

In the above state, that is, in a state where the core mounting shaft 1 is not set in the winding manufacturing device, the locking member 9
is fitted into the center hole 13 of the base member 8, and the locking member 9 does not protrude from the outer peripheral surface of the core mounting shaft 1, so that the core a can be freely attached to and removed from the core mounting shaft 1 from the cap member 7 side. can. The core a is fitted onto the core mounting shaft 1, in other words, the shaft body 2, and the end b of the core a and the collar surface 10 of the collar member 3 are brought into contact. Then, the core mounting shaft 1 is set in the mounting portion of the winding manufacturing device using the bosses 4 and boss portions 5 at both ends of the core mounting shaft 1. Then, the slide member 6 is pressed in the direction of compressing the shaft by the mounting part of the winding manufacturing device, so that the slide member 6 is pressed against the coil spring 28.
The wedge portion 27 of the slide member 6 is inserted into the opposing gap between the inner sides 21 of the locking member 9, and the locking member 9 supports the spring 2 with the pin 19 as a fulcrum.
0, the locking member 9 rotates in the outer circumferential direction.
The outer edge 22 of the locking member 9 protrudes from the back plate portion 12.
The inner end surface 33 of the head 16 of is engaged with the end c of the core. Therefore, the core a can be sandwiched between the collar surface 10 of the collar member 3 and the inner end surface 33 of the locking member 9.

The core mounting shaft 1 with the core a mounted thereon as described above is set in a winding manufacturing device, and the device is driven to wind, for example, base paper of toilet paper around the core a. When winding is completed, the rotation of the device is stopped and the core mounting shaft 1 is removed from the device. Then, the pressure applied by the mounting part of the winding manufacturing device is released, and the slide member 6 moves outward by the coil spring 28, and the wedge part 27 retreats from between the locking members 9, so that the locking member 9 is The spring 20 reduces the diameter and fits into the central hole 13. Therefore, the locking member 9 is disengaged from the end b of the core a, and there is nothing protruding from the outer peripheral surface of the core mounting shaft 1, so the core a can be freely pulled out from the cap member 7 side. can.

<Effects of the invention> According to the invention, when the core mounting shaft is removed from the winding manufacturing device, the locking member automatically retracts into the shaft, and there is no protrusion on the outer peripheral surface of the shaft, making it possible to remove the core. Can be put on and taken off freely. Furthermore, when a core-equipped shaft with a core fitted thereon is set in the winding manufacturing device, the core-mounting shaft is slightly pressed in the direction of compression by the mounting section of the winding manufacturing device, so that the slide member moves inward. The locking member protrudes from the outer peripheral surface of the shaft, and the end of the core attached to the shaft body is locked by the locking member, and the core is sandwiched between the locking member and the collar surface of the collar member. I can do it. Therefore, the present invention eliminates the need to fix the core with screws or pins each time it is attached to the core attachment shaft, significantly reducing the effort required to attach and detach the core, and has practical value that significantly improves work efficiency. This is extremely high.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 shows the core being mounted on the core mounting shaft, the sliding member being pressed inward, and the locking member protruding from the outer peripheral surface of the shaft. Fig. 2 is a partial cross-sectional view of the core being sandwiched between the collar member and the slide member when the pressure on the slide member is released, the slide member retreats outward, and the locking member retracts into the shaft. FIG. 3 is a cross-sectional view showing a state in which the locking member and the end of the core are disengaged, and FIG. DESCRIPTION OF SYMBOLS 1... Core mounting shaft, 2... Shaft body, 3... Collar member, 4... Boss, 5... Boss part, 6... Slide member, 7... Cap member, 9... Locking member, 10 ...Brim surface, 20... Spring as a biasing member, 28... Coil spring.

Claims (1)

[Claim for Utility Model Registration] By inserting a shaft into the core, sandwiching both end faces of the core with a collar member having a boss on the outer end face, and mounting the boss on the mounting part of a winding manufacturing device. In a core mounting shaft for setting a core in a winding manufacturing device, a collar member having a flange surface is provided on one end of the shaft main body that can be inserted into the inside of the core, and a collar member having a collar surface that is approximately the same as the shaft main body is provided on the other end of the shaft main body. Provide a cap member with a diameter of
A boss is provided protruding from the outer end surface of the collar member, and a slide member that is urged outward along the axis by a coil spring is slidably accommodated in the cap member, and the outer end of the slide member is slidably accommodated. A plurality of locking members are provided between the cap member and the shaft body, the ends of which are used as boss portions to protrude from the outer end surface of the cap member, and which can protrude in the direction of the outer circumferential surface of the shaft, and the locking members are arranged in a diameter-reducing direction. When the core mounting shaft is mounted on the winding production device with the inner end of the slide member facing the opposing interval of each locking member in a wedge shape, the slide member is biased by the biasing member. When the inner end of the slide member is pushed in the direction of compressing the shaft by the mounting part of the device and enters the opposing interval of the locking member, the locking member is pushed open and protrudes onto the outer peripheral surface of the shaft, causing the protruding locking member to be pushed open. 1. A core mounting shaft for a winding manufacturing device, characterized in that a core inserted into a shaft body is sandwiched between a stop member and a collar surface of a collar member.