JP2001199639A - Protector for sheet drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protector for a sheet drum capable of preventing the sheet drum obtained by winding a wide and long sheet material such as a film material, a resin sheet material, a paper material or the like onto a cylindrical core, from being damaged and ruptured by the self-load while being stored or transferred and carried by a vehicle or the like, preventing a corner part from being damaged by the external force, remarkably reducing the production of defectives, and being easily manufactured and used. SOLUTION: This protector used for protecting a sheet drum 1 formed by winding a wide and long sheet 2 onto a cylindrical core 3, is provided with a cylindrical insertion body 5 having a diameter smaller than an inner diameter of the core 3, plural engagement bodies projected from an outer circumferential surface 5a of the insertion body in the outer circumferential direction and contacted with an inner circumferential surface 3a of the core 3 for preventing the axial movement, and a large supporting body 6 largely radially projected at an outer end part of the insertion body 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum made by winding a wide and long sheet-like material around a cylindrical core in multiple layers, that is, in a state where the sheet drum is lifted from the floor surface. The present invention relates to a protector that is used by being inserted into or externally fitted to the cylindrical core from both sides so as to be supported.

[0002]

2. Description of the Related Art Conventionally, many and many kinds of sheet drums are manufactured by winding a wide and long sheet material such as a film material, a resin sheet material, a paper material, etc. around a cylindrical core to form a sheet drum. It is transported to processors and consumers through institutions.

[0003]

However, in general, such a sheet drum is simply wrapped with paper or the like around the outermost surface thereof and is simply packaged. Because it is directly mounted, the outer packaging and surface layer are easily damaged and the corners at both ends are easily damaged by vibration and its own load during transportation or transportation by a vehicle or the like. It had problems. Also, sometimes, a large impact or an external pressure directly causes damage to the inner part of several layers of the roll sheet, and the problem that the entire sheet drum becomes defective cannot be wiped out. It also had.

[0004] In order to solve the problems of the conventional sheet drum, the present invention does not directly apply a load to the roll sheet itself, and prevents the roll sheet itself from being damaged or broken by its own load. At the same time, it is possible to prevent the occurrence of damage to the corners due to external force, to greatly reduce the occurrence of defective products, and to provide a protector for a sheet drum that is easy to manufacture and use. .

[0005]

Means for Solving the Problems The structure of the present invention for achieving the object will be described with reference to the reference numerals used in the description of the embodiments. The first structure of the seat drum protector according to the present invention is as follows. A protector used to protect a sheet drum 1 formed by winding a wide and long sheet 2 around a cylindrical core 3, wherein the cylindrical insert 5 has a diameter smaller than the inner diameter of the core 3. A plurality of engaging members 7 projecting from the outer peripheral surface 5a of the insert 5 in the outer peripheral direction and abutting against the inner peripheral surface 3a of the core 3 to prevent movement in the axial direction; A large-sized support body 6 that protrudes largely in the radial direction is provided.

The second structure according to the fourth aspect of the present invention provides a cylindrical fitting body 50 having a diameter larger than the outer diameter of the cylindrical core 3 and an inner peripheral surface 50 a of the fitting body 50. An engaging body 70 protruding in the inner circumferential direction from the outside and coming into contact with the outer peripheral surface 3b of the core 3 to prevent movement in the axial direction, and a large supporting body protruding largely in the radial direction at the outer end of the fitting body 50 6
Are provided.

Further, in the third configuration according to the fifth aspect, a cylindrical fitting body 50 formed to have a larger diameter than the outer diameter of the cylindrical core 3, and an outer end of the fitting body 50. A ring-shaped elastic packing member comprising a large-sized support member 6 which protrudes largely in a radial direction, wherein an inner peripheral surface 50a of the fitting body 50 is fitted into an annular groove 31 formed on an outer peripheral surface 3b of the core 3. 32 is configured to abut on a protruding portion of the core 3 from the outer peripheral surface 3b to prevent movement in the axial direction.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In implementing a seat drum protector according to the present invention having such a configuration,
When the large support 6 is formed as a substantially square shape in a direction perpendicular to the axis, the rolling support does not roll as compared with a circular shape, and the mounted state is reduced. There is a stable advantage. In addition, the engagement body 7
In order to make it elastically displaceable in the inner diameter direction of the cylindrical insert 5, cuts are made on both sides thereof, the portion between them is made independent, and the base is pivoted about its base end. Good. The engaging body 7 has an annular groove 11 formed in the outer peripheral surface 5a of the cylindrical insert 5 and an elastic packing member is fitted in the annular groove 11 so that the outer peripheral portion protrudes from the outer peripheral surface 5a of the insert 5. It can be implemented as an already configured configuration. Further, the insert 5 may be formed in an appropriate number of divided bodies such as a half-split shape or a three-split shape, and may be connected in a tubular shape at the time of use.

The fitting body 50 is also provided with connecting portions 51 and 52 which are formed in a half-split shape or another divided body in the manufacture thereof and which are connected to each other. Can be embodied as a structure that is connected in a cylindrical shape on the outer periphery of the. In addition, the fitting body 5
The core 3 used by fitting the outer member 0 is not required to have a smooth outer peripheral surface, and has a structure in which a concave portion or an annular groove for engaging the engaging body 70 is formed on the outer peripheral surface. It can be implemented as

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views showing a first embodiment of the first configuration of the present invention, FIG. 1 is a perspective view of each part for explaining a use state, FIG. 2 is a perspective view of a protector, FIG. 3 is a side view of the upper half portion for explaining a use state.

The sheet drum 1 shown in this embodiment is an article formed by winding a plurality of layers of a long sheet 2 having a wide width such as a film around a cylindrical core 3 and an outer peripheral surface thereof. The protectors 4 and 4 according to the present invention include the cylindrical insert 5
The core 3 is used by being detachably inserted into the core 3 from both ends. The core 3 is formed in a cylindrical shape having a predetermined length and diameter from a synthetic resin material such as an ABS resin material.

As shown in FIGS. 1 and 2, the protector 4 has a cylindrical insert 5 and a thin plate-like support projecting from one end of the insert 5 in a square shape in a front view in a radial direction. 6 and are integrally formed. This insert 5
Is formed to have an outer diameter slightly smaller than the inner diameter of the core 3 so as to be inserted along the inner peripheral surface 3a of the core 3. The strength of the insert 5 and the support 6 is sufficient to support the core 3 on which the sheet 2 is wound. For example, the support 6 is made of a cylindrical insert 5 and a square outer peripheral edge a in order to reduce the amount of material used and to reduce the weight.
Are formed between them, and are connected by reinforcing ribs c having a T-shaped cross section in the vertical and horizontal oblique directions.

[0013] The insert 5 has a circumferential 3
At two places, there are provided two notches 8, 8 cut from the front end side with an appropriate width therebetween, and the portion between them is formed as an engaging body 7 that projects toward the outer periphery toward the free end side. The amount of protrusion of the engaging body 7 in the outer circumferential direction from the outer circumferential surface 5a is defined as the amount of protrusion that elastically presses and contacts the inner circumferential surface 3a of the core 3 when inserted into the inner circumferential surface 3a of the core 3. is there.

When the protector 4 thus inserted is inserted with its insert 5 portion directed into the inner peripheral surface 3 a of the core 3,
As shown on the right side of FIG. 3, the engaging body 7 is inserted into the core 3 as shown on the left side of FIG. 3 while being elastically deformed toward the inner surface side of the insertion body 5. Engagement body 7 after insertion
Of the core 3 presses against the inner peripheral surface 3a of the core 3 to prevent the core 3 from moving in the axial direction and to oppose the natural force that tends to escape.
Also, after the sheet 2 on the core 3 is fed out and used,
When removing the protector 4 from the core 3, the protector 4 can be easily pulled out by pulling the square-shaped support 6 and can be removed.

FIGS. 4 and 5 show a second embodiment, in which a protector 4 shown in this embodiment has an insert 5
Are cylindrical, and two annular grooves 11,
11 are formed, and annular elastic packing members 7a, 7b are fitted into the respective annular grooves 11, 11, and a part thereof is protruded from the outer peripheral surface 5a of the insert 5 to form the engaging body 7. It is. The projecting portions of the elastic packing members 7a and 7b as the engaging members 7 in the outer peripheral direction are
It contracts and deforms in the core 3 and firmly contacts the inner peripheral surface 3 a of the core 3. This prevents the protector 4 from coming out freely. In this embodiment, two elastic packing members 7a and 7b are used. However, it goes without saying that one elastic packing member may be used.

The embodiment shown in FIGS. 6 to 8 is a third embodiment. The protector 4 shown here has four planes at four places in the circumferential direction of the insert 5 in the axial direction. U-shaped through-grooves 9 are formed, and the portion between the through-grooves 9 is made to oscillate with the tip end of the insert 5 as a base point. The engaging member 7 (shown as 7c in the drawing to distinguish it from the engaging member 7 in the first embodiment.
d and 7e are the same). Reference numeral 10 in the figure
Is a die groove formed to facilitate elastic deformation of the engagement body 7a. The amount of protrusion of the engaging body 7 in the outer circumferential direction from the outer circumferential surface 5a is also such that when the engaging body 7 is inserted into the inner circumferential surface 3a of the core 3, the amount of protrusion elastically presses and contacts the inner circumferential surface 3a of the core 3. There is.

FIG. 9 shows a fourth embodiment showing a modification of the third embodiment. The engaging member 7 (reference numeral 7d) in the insert 5 of the protector 4 shown here is the outer peripheral surface portion thereof. Is provided with a plurality of steps each having a sawtooth shape in a side view. Others are the same as the third embodiment.

The embodiment shown in FIGS. 10 and 11 is a fifth embodiment, and the protector 4 shown here is similar to the first embodiment in that the end of the insert 5 in the axial direction is similar to that of the first embodiment. A pair of notch grooves 8, 8 are formed in parallel from each other at six locations in the circumferential direction. 7e). Others have a structure according to the first embodiment.

In each of the embodiments described below, the seat drum 1 is connected to the outer peripheral surface of the core 3 and used. The sixth embodiment shown in FIGS. 12 to 16 is an embodiment showing the second configuration according to claim 4, wherein the entire protector 4 is divided into two parts along the axial direction of the cylindrical fitting body 50. Half-divided bodies 4A and 4B, one of which (upper right in FIG. 13) is divided.
13A, a male-side connecting portion 51 having an engaging claw projecting from the large-sized support member 6 on the cut end surface side is provided on the left and right sides of the cylindrical fitting body 50, and the other (see FIG. The half-divided divided body 4B (lower left) is provided with a female U-shaped side surface at a location biased toward the cut end face of the large support body 6 so as to face and receive the male-side connecting portion 51. Side connection part 5
2 are provided on the left and right sides of the cylindrical fitting body 50, and the male-side connecting portion 51 and the female-side connecting portion 52 are inserted and engaged to connect the two half-shaped divided bodies 4A and 4B together. Things.

The shapes or structures of the connecting portions 51 and 52 are not limited to those shown in the embodiments, but may be any other generally known suitable forms. Further, in the two half-shaped divided bodies 4A and 4B shown in this embodiment, when the male-side connecting portion 51 and the female-side connecting portion 52 are respectively arranged symmetrically, a single form of the two forms is obtained. It has the advantage that it can be used in conjunction.

The protector 4 shown in the embodiment is
The inner diameter of the cylindrical fitting body 50 is formed to be slightly larger than the outer diameter of the cylindrical core 3, and protrudes annularly in the inner circumferential direction from the inner peripheral surface 50 a of the fitting body 50 at the front end portion thereof. As shown in FIG. 16, the engagement member 70 is engaged with the annular groove 31 formed on the outer peripheral surface 3b of the core 3 to move in the axial direction as shown in FIG. Is to prevent.

The fitting body 5 of the protector 4 shown in this embodiment
The engagement body 70, which is annularly protruded in the inner peripheral direction from the inner peripheral surface 50a of the front end side portion of the engagement member 70, does not need to be annular, and may be a partial protrusion.
It is needless to say that the position where 0 is formed is not limited to the leading edge portion but may be another portion.

The seventh embodiment shown in FIG. 17 is another embodiment showing the second configuration according to claim 4, wherein the entire protector 4 is formed as a single unit and formed into a cylindrical shape. 50
At the six circumferential positions, two pairs of cut grooves 8, 8 are formed in parallel with each other along the axial direction from the distal end of the fitting body 50, and the portion between the cut grooves 8, 8 is formed in a mountain shape along the longitudinal direction on the inner surface side. Thick engaging body 7 protruding toward
0. In this manner, when the protector 4 is externally fitted and pressed into the core 3, the engagement member 7
0 has a structure in which it is pressed against the outer peripheral surface 3 b of the core 3.

The eighth embodiment shown in FIG. 18 is an embodiment showing the third configuration according to claim 5, wherein the protector 4
Are integrally formed, the fitting body 50 is also formed in a cylindrical shape, and the inner peripheral surface 50a is slightly larger in diameter than the outer peripheral surface 3b of the core 3, and more specifically, 50
The diameter of the inner peripheral surface 50a is set to a size that comes into contact with the annular elastic packing member 32 fitted in the annular groove 31 formed in the outer peripheral surface 3b of the core 3. In this manner, the inner peripheral surface 50a of the fitting body 50 is brought into pressure contact with the protruding portion of the elastic packing member 32 from the core outer peripheral surface 3b to prevent movement in the axial direction.

Although the support 6 of the protector 4 shown in each of the above embodiments is shown as a square having a predetermined thickness in a front view, the shape of the support 6 may be rectangular or on both sides. Can be implemented as an elliptical arc or the like having an arc shape and an upper and lower straight line. The provision of such a linear portion has an advantage that it can be used in a stable state without rolling during use. . However, the present invention is not limited to these, and may be a circular shape according to the state of use.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structures of the embodiments, but has the above-mentioned constitutional requirements according to the present invention, and The present invention achieves the object described above and can be implemented with appropriate modifications within a range having the following effects.

[0027]

As is clear from the above description, the protector according to the present invention can be applied to a sheet drum in which a wide and long sheet is wound around a cylindrical core in multiple layers. The core is attached to both sides of the core to support the core. The first configuration is an insert for inserting the protector into the core, and a support for supporting the insert outside the core. And an engaging body for preventing free movement of the insert body in the axial direction in the core, so that by using this,
Loads and external impacts are not directly applied to the surface or corners of the sheet drum, and damage or trauma that easily reaches the surface of the sheet material or several layers is easily prevented. It is possible to expect a remarkable effect of greatly reducing the occurrence rate of defective products. In addition, the present invention has an effect that the manufacture and use are extremely simple and easy.

In the second and third configurations, since the outer peripheral surface is connected to the core of the sheet drum, the configuration is influenced by the inner diameter of the core. Without, and has the advantage that it can be used even if it has a hole-free shape,
It also has the same effect as described above.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of each member showing a first embodiment.

FIG. 2 is a perspective view of the protector of the embodiment.

FIG. 3 is an upper half cut side view showing a use state of the embodiment.

FIG. 4 is a front view of a protector according to a second embodiment.

FIG. 5 is a partially cut-away side view of FIG. 4;

FIG. 6 is a front view of a protector according to a third embodiment.

FIG. 7 is a partially cut-away side view of FIG. 6;

FIG. 8 is a perspective view of FIG. 6;

FIG. 9 is a perspective view of a protector according to a fourth embodiment, corresponding to FIG. 8;

FIG. 10 is a front view of a protector according to a fifth embodiment.

FIG. 11 is a partially cut-away side view of FIG. 10;

FIG. 12 is a perspective view of a protector according to a sixth embodiment.

FIG. 13 is a perspective view showing the separated state of FIG. 12;

FIG. 14 is a plan view showing the separated state of FIG. 12;

FIG. 15 is a side view of the female half-split body of FIG. 12;

FIG. 16 is a top half cut side view showing a use state of the embodiment.

FIG. 17 is an upper half cut-away side view showing a protector according to a seventh embodiment and a use state thereof.

FIG. 18 is an upper half cut side view showing a protector according to an eighth embodiment and a use state thereof.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet drum 2 sheet 3 core 3a inner peripheral surface of core 3b outer peripheral surface of core 4 protector 5 insert 5a outer peripheral surface of insert 6 support 7 engaging body 11 annular groove 31 annular groove 32 packing member 50 fitting body 50a fitting body Inner peripheral surface of 70

Claims (7)

[Claims] 1. A wide and long sheet on a cylindrical core (3).
A protector used to protect the sheet drum (1) wound by (2), and a cylindrical insert (5) formed to have a smaller diameter than the inner diameter of the core (3); and The inner peripheral surface of the core (3) protruding in the outer peripheral direction from the outer peripheral surface (5a) of the body (5)
Engagement body (7) that abuts (3a) to prevent axial movement
And a large-sized support (6) that protrudes largely in the radial direction at the outer end of the insert (5). 2. The seat drum protector according to claim 1, wherein the engagement body is formed so as to be elastically displaceable in an inner diameter direction of the cylindrical insertion body. 3. An outer peripheral surface (5) of an engagement body (7) of a cylindrical insert (5).
2. The seat drum according to claim 1, wherein an annular elastic packing member is fitted into the annular groove (11) formed in (a), and an outer peripheral portion thereof is projected from an outer peripheral surface (5a) of the insert (5). Protector. 4. A wide and long sheet on a cylindrical core (3).
(2) a protector used to protect the sheet drum (1) formed by winding, a cylindrical fitting body (50) formed to have a larger diameter than the outer diameter of the core (3), This mating body (50)
An engaging body (70) that projects in the inner circumferential direction from the inner circumferential surface (50a) of the core (3) and contacts the outer circumferential surface (3b) of the core (3) to prevent movement in the axial direction.
And a large-sized support (6) that protrudes largely in the radial direction at the outer end of the fitting body (50). 5. A wide and long sheet on a cylindrical core (3).
(2) a protector used to protect the sheet drum (1) formed by winding, a cylindrical fitting body (50) formed to have a larger diameter than the outer diameter of the core (3), A large support that protrudes largely in the radial direction at the outer end of the fitting body (50)
(6), the inner peripheral surface (50a) of the fitting body (50) is the core
The outer peripheral surface of the core (3) of the annular elastic packing member (32) fitted in the annular groove (31) formed on the outer peripheral surface (3b) of (3).
(3b) A protector for a sheet drum configured to contact with a protruding portion from (3b) to prevent movement in the axial direction. 6. The cylindrical fitting body (50) according to claim 4, wherein the cylindrical fitting body (50) is a divided body and includes connecting portions (51) and (52) that are connected to each other. The protector for the sheet drum as described. 7. The protector for a sheet drum according to claim 1, wherein the support (6) is formed in a substantially square shape in a direction orthogonal to the axis.