JPS5821367Y2 - Roll holder - Google Patents

Description

[Detailed description of the invention] The present invention is a plastic bag that is used by tearing each unit of use along a breaking line such as a perforation that has been made in advance for each unit of use, or by using a cutter set in a holder. It relates to a roll holder that supports and holds a roll made by winding a thin film product in the form of an elongated strip, such as a plastic bag or a packaging sheet, around a core, through the core in a rotatable and removable manner. The purpose of this is to prevent unnecessary rotation of the roll during unwinding and breaking of the thin film product while the consumption is still small, that is, the roll diameter is large and the weight is relatively large.

Another object of the present invention is to provide a braking device capable of unwinding and pulling out a thin film product with a substantially uniform unwinding force in a rotary motion for unwinding the thin film product, regardless of changes in the consumption amount of the thin film product, that is, changes in the winding diameter and weight. There is a particular thing.

In general, a roll in which a core is wrapped with thin film products such as plastic bags or plastic bags that are broken and used in units of use is rotatably held through the core. The thin film product is assembled into a holder and fixed to a showcase, cash register table, soccer table, wall, etc., and when used, the thin film product is rewound and broken into units of use.

In this way, since thin film products are used for breaking after being unwound from a roll, the roll holder is designed to allow the roll to rotate freely through the winding core so that the thin film product can be easily unwound from the roll. I needed to keep it that way.

However, the roll, which is rotatably held in a roll holder via a core, is pulled out by pinching the tip of the thin film product, and then rotated to unwind the product.While unwinding the thin film product, it is broken in units of use (one piece). Each time the roll is pulled as strongly as possible, the roll does not immediately stop its previous rotation as soon as the withdrawal operation stops after breaking the thin film product, and the inertia of the roll as a rotational motion is generated accompanying the breaking action. When motion is applied, a rotational moment exceeding a certain value is generated, resulting in unnecessary rotation more than necessary, resulting in the inconvenience of unnecessarily unwinding the thin film product beyond the unit of use.

This disadvantage is noticeable when the consumption of thin film products is low, that is, when the roll diameter is large and the weight is relatively large, and the rotational moment due to the inertial movement is large, but as the consumption of thin film products increases. Even with rolls whose winding diameter and weight are decreasing, the braking force on the roll that is generated between the roll core and the roll holder is decreasing due to the roll's own weight as the winding diameter and weight decrease. This often occurs because the roll itself is easily rotated by the unwinding and breaking operations of the thin film product.

Of course, when unwinding this thin film product, if you hold the tip of the thin film product with one hand and pull it out while rotating the roll while holding the roll with the other hand, you can avoid unnecessary rotation of the roll. However, when using thin-film products, one hand is often holding some kind of object, so only one hand can be used to unwind the thin-film product. In addition, as mentioned above, the unwound thin-film product is pulled strongly at the same time as it is unwound and broken in the unit of use, so the roll rotates unnecessarily, causing damage to the thin-film product. This resulted in an increase in the amount of unnecessary rewinding.

In addition, there is a means to apply a braking force by applying a frictional force between the roll holder and the core of the roll in response to the rotational movement of the roll relative to the roll holder, but this applied braking force is applied to the roll. Since it is a constant value regardless of the amount of thin film product wound, the pull-out force of the thin film product when the roll is unwound is smaller when the consumption amount of the thin film product is small, and the winding diameter is large. As the arm length becomes longer, it becomes weaker, and conversely, as the consumption of thin film products increases, the winding diameter becomes smaller, and therefore the arm length as a rotational moment becomes shorter, so it becomes stronger, regardless of the amount of thin film products. ,
It was not possible to obtain a fairly constant pulling force.

And, as the consumption of thin film products increases,
Since both the winding diameter and the weight of the roll decrease and the rotational moment in the inertial motion decreases as the consumption of the thin film product increases, the braking force of a constant value in the above means is applied until the consumption of the thin film product is sufficient. If the settings are set so that an appropriate amount of pulling force can be obtained during the increased period, the roll can be rotated easily with a small pulling force while the consumption of thin film products is still small. Although it is easy to rotate the roll, it is weak in preventing rotation against inertial motion based on the rotation of the roll, and cannot prevent unnecessary rotation of the roll.

On the other hand, if the setting is made so that an appropriate amount of pulling force can be obtained by balancing the size of the appropriate range of roll rotation prevention resistance during periods when the consumption of thin film products is low, thin film When the amount of product consumed has increased sufficiently, the pull-out force for unwinding the roll is so strong that the pull-out operation becomes difficult.

In the end, stable and smooth unwinding and breaking operations of the thin film product could not be obtained.

The present invention was devised in order to eliminate the inconveniences in roll holders, including the conventional examples described above. A part of the braking body, which can slide in a direction intersecting the support axis of the roll, is configured to press against the circumferential surface of the roll with force in accordance with changes in the consumption amount of the thin film product.

An embodiment of the present invention will be described below with reference to the drawings.

The roll holder according to the present invention has a core for winding a thin film product (this core has a flange-like side plate in order to stably hold the winding form of the thin film product and protect the side end surface as a roll). It is better to take it as a fact.

Furthermore, the core used in the present invention preferably has a hollow cylindrical main body. , and a brake body 5 for applying a constant braking force to the rotatably held roll R.

The holder main body portion is designed to face the base 1 from both ends of the base 1 in a mutually parallel posture, and to be attached to a predetermined location of the roll holder and to be attached to other components. Both holding side surfaces 2.2 are provided upright, and the roll R is wound around the core at a location on the mutually opposing surfaces of both holding side surfaces 2, 2 at a height greater than the radius of the roll R from the base 1 by a predetermined value or more. The core shaft 4, which serves as a shaft to be supported through the shaft, is assembled and held in a construction manner by fixing bearings 3, 3, respectively.

In the case of the illustrated embodiment, as is clear from FIGS. 1 and 4, both the holding side surfaces 2, 2 are vertically bent from both ends of the base 1 and are integrally molded. It goes without saying that one or both of them may be formed separately from the base 1.

The upper end portions of both holding sides 2, 2, which are directly above the location where the bearings 3 are provided, are bent outward to form a tapered surface, which is connected to the bearings 3, 3 of the core shaft 4. This is to facilitate the incorporation of

As shown in FIG. 5, the bearing 3 that inserts and holds the end of the core shaft 4 is inserted into the main body 3a, which has a U-shaped groove that is open upward, and the core shaft 4 is inserted up to the bottom of the U-shaped groove of the main body 3a. A presser spring 3b is installed to prevent the end portion from unnecessarily pulling out upward.

Therefore, in order to assemble the core shaft 4 to which the roll R has been assembled into the bearing 3, the end of the core shaft 4 is forced to push aside the presser spring 3b and penetrate into the bottom of the U-shaped groove of the main body 3a.

Therefore, since the weight of the new roll R, which has not yet been consumed as a thin film product, is large, this large weight causes the core shaft to
It is very easy to push the end of the presser spring 3b away from above and make it enter the groove of the main body 3a, and similarly, due to the large weight of the roll R, the core shaft 4 held in the bearing 3
There is no risk that the end of the spring 3b will push away the presser spring 3b and unnecessarily come out upwards.

In the case of the embodiment shown in FIGS. 1 to 4, the bearing 3 is opened upward in a direction perpendicular to the base 1 because the base 1 is located at a lower position so that the holder is mounted on a table. However, when the holder is attached to a wall surface, it goes without saying that the base 1 is positioned vertically and the bearing 3 is arranged parallel to the base 1 with its upper side open.

The brake body 5 is assembled to the upper surface of the base 1 so as to be slidable in a direction perpendicular to the axis of the core shaft 4 held (in the illustrated embodiment, a direction perpendicular to the axis). As is clear from the figure, the sliding arm 6 is slidably attached to the base 1;
At a position extending from this sliding arm 6 in a direction intersecting with the sliding arm 6 (orthogonal direction in the illustrated embodiment) and facing the circumferential surface of the roll R held by sliding of the brake body 5. It is composed of a presser piece 7 that is pressed against the roll R in parallel to the roll R.

Various methods can be considered for slidably assembling the sliding arm 6 to the base 1, but in the case of the illustrated embodiment, the sliding arm 6 can be freely slid between the base 1 and the base 1 without getting stuck. A guide piece 9 having a long groove inserted into the base 1 is fixed on the upper surface of the base 1.

In the case of the illustrated embodiment, the brake body 5 has two sliding arms 6 so that its sliding movement is stable, so the guide piece 9 has two sliding arms 6. They are designed to be slid and held individually.

In the case of the illustrated embodiment, the brake body 5 is constructed by bending a single round bar body into a predetermined shape, but it goes without saying that it may have another shape, for example, a plate material.

The holding piece 7 extends in a direction intersecting the sliding arm 6, but in the case of the embodiment shown in FIGS. , the position facing the circumferential surface of the roll R is formed into a bent portion that extends from side to side in parallel with the circumferential surface of the roll R, so as to be a surface that comes into contact with the circumferential surface of the roll R.

The presser piece 7 is a part that applies a pressing force directly to the circumferential surface of the roll R held by the holder on the surface that comes into contact with the circumferential surface of the roll R, and applies a braking force to the roll R by this pressing force. However, the surface of this presser piece 7 that comes into contact with the circumferential surface of the roll R is made smooth so as not to damage the thin film product.

In the embodiment shown in FIGS. 1 to 4, the holding piece 7 is shaped like a round bar and has a smooth surface, and is assembled parallel to the held roll R over approximately the entire length of the roll R. Pressure contact is made over the entire length.

Note that the brake body 5 may be made of a plate material, as described above, as long as the surface that comes into contact with the peripheral surface of the roll R is a smooth surface.

Although the configuration of this presser piece 7 is sufficiently effective with the embodiments shown in Figs. 1 to 4, it has an important function of directly applying a braking force to the roll R. A more desirable configuration of the holding piece 7 for this purpose is as shown in FIGS. 6 to 9.

In the embodiment shown in FIG. 6, only the portion of the holding piece 7 that is directly pressed against the roll R is formed by a pipe having a relatively large outer diameter, and the smooth outer peripheral surface of this pipe is covered with the holding piece 7.
By making the pressure contact surface to the roll R, the contact between the thin film product and the holding piece 7 is made smooth.

In the case of the embodiment shown in FIG. 7, a cushioning material such as a sponge coated with a material that is easy to slip on the surface is provided on the surface of the presser piece 7 that is pressed against the roll R, and the presser piece is pressed through this cushion structure. The pressing force from the piece 7 is applied to the roll R.

Due to the effect of the cushion structure, the embodiment shown in FIG. By making it possible to apply the pressing force from the presser piece 7 almost uniformly along the circumferential surface of the roll R in parallel with the circumferential surface of the roll R, it is possible to apply pressure force from the presser piece 7 almost uniformly to the circumferential surface of the roll R, thereby reducing the pressure locally on only the convex portions. This prevents the thin film product from being damaged due to the pressing force acting on the holding piece 7 and the thin film product being caught between the holding piece 7 and the thin film product.

In the embodiment shown in FIG. 8, the portion of the presser piece 7 that is pressed by the roll R has a roller structure with a support shaft parallel to the roll R, and the presser piece 7 is in direct contact with the roll R in this way. By making the part have a roller structure and making the pressing action between the presser piece 7 and the thin film product into a pressing action that generates rolling friction, the surface of the roll R has unevenness and a pressing force acts locally on the circumferential surface of the roll R. Even if this happens, it becomes impossible to eliminate the catch caused by the pressing action caused by sliding friction between the presser piece 7 and the thin film product, and the thin film product may be damaged by the presser piece 7. There is no possibility of any inconvenience occurring.

The embodiment shown in Fig. 9 shows a modification of the one shown in Fig. 8, in which the roller has a gentle shape and a large In order to form a diameter part, as shown in the figure, the center part has a large diameter and the outer diameter gradually decreases toward both sides, forming a beadal shape. When unwinding and breaking, the central bulging part of the presser piece 7 comes into local contact with the center of the break line of the thin film product during unwinding and breaking. Stress is concentrated and the breakage progresses gradually from the iron part, and the holding piece 7 in the shape of a biadal roller makes it easy to break the thin film product.

As described above, various structures are conceivable for the holding piece 7, but no matter which structure of holding piece 7 is used, the tip of the thin film product is pinched while receiving the pressing force from this holding piece 7, and the thin film is removed. When the product is rewound, the roll R rotates while receiving the pressing force from the holding piece 7, and therefore, the rotational movement of the roll R stops at the same time as the pulling force on the thin film product is released. .

In the case of the embodiment shown in FIGS. 1 to 4, as is clear from FIG. A part of the holding piece 7 is made to protrude with respect to the post-passage position to form a broken piece 8, and this broken piece 8 is formed by forming a broken piece 8 such as a perforation line or the like for each unit of use of the wrapped thin film product. If there is
The unwinding operation of the thin film product itself attempts to break the unwound product portion at the front end from the break line.

That is, as is clear from FIG. 3, when the tip of the thin film product is pinched and pulled out, this pulling force overcomes the braking force applied by the pressing force of the presser piece 7 and rotates the roll R.

Therefore, when the break line is located at the break piece 8, a large pressing force is locally applied to the part of the break line that comes into contact with the break piece 8 projected with respect to said position in the withdrawal path of the thin film product. As a result, it gradually breaks from the contact portion with the broken piece 8, and as the drawer progresses, it is completely broken at the break line.

Now, the braking body 5 applies a braking force to the roll R by applying a pressing force to the roll R through the holding piece 7, and as a means for applying a pressing force to the braking body 5, In the case of the illustrated embodiment, there is a presser piece 7 between the locking piece 11 immovably fixed to the brake body 5 and the base 1.
is arranged in the direction of pressing against the circumferential surface of the roll R, and the tension spring 10 is tensioned, and the holding piece 7 applies a tensile force in the direction of sliding the brake body 5 in the direction of applying a pressing force to the roll R. ing.

The tension spring 10 is designed to be able to be pulled out with a constant pulling force throughout until the thin film product is used up.
The wire diameter, pitch, number of turns, mounting points, etc. are set to apply braking force to the roll R.

By the way, since the braking body 5 is constantly receiving a tensile force from the above-mentioned tension spring 10, the braking body 5 is slid by this tension spring 10, and the braking body 5 is moved by the new roll R.
It becomes a hindrance when assembling the roll holder to the roll holder.

Therefore, when assembling or dismounting the roll R, it is desirable to be able to lock the brake body 5 at a predetermined position against the elasticity of the tension spring 10.

In the illustrated embodiment, this locking mechanism includes a locking piece 12.
is provided at a position where the brake body 5 is locked and held when the brake body 5 is advanced against the elasticity of the tension spring 10 to a point where there is no problem in assembling the roll R to the holder.

In the case of the embodiments shown in FIGS. 2 to 4 and 10,
The locking mechanism is constructed between the base 1 and the aforementioned locking piece 11.

That is, the lock piece 12 is attached to the mounting base 1 at the predetermined position.
It is fixed to the base 1 via a pin 6, and its tip is bent to form a key portion 17.

On the other hand, the locking piece 11 has a projecting piece 1 that can be engaged with the key part 17.
8 is formed.

The lock piece 12 is pivotably supported relative to the mounting base 16 under the action of a coil spring (not shown) in a state where the lock piece 12 receives a rotational force in a direction that maintains the engagement between the key part 17 and the projection piece 18. This is what is being done.

In the embodiment shown in FIGS. 11 and 12, the locking mechanism is formed between the base 1 and the sliding arm 6.

That is, a leaf spring 19 is attached to the back surface of one base with a guide piece 9 fixed to the upper surface, a through hole 20 is formed at the sliding groove position of the guide piece 9 in the base 1, and the leaf spring is inserted through the through hole 20. The lock piece 12 fixed to the guide piece 9
In contrast, a fitting hole into which the lock piece 12 can be fitted is formed at a predetermined position on the base end side of the sliding arm 6.

In the case of the embodiment shown in FIGS. 11 and 12, the lock piece 1
The lock release means according to 2 is provided at the tip of the leaf spring 19.
The locking piece 12 is pushed in the direction in which the plate spring 19 separates from the base 1 (downward) by pushing in the release piece 21, which is individually defined so as to penetrate through the base 1 and protrude to the upper surface of the base 1.
The sliding arm 6 is made to escape from the fitting hole formed in the sliding arm 6.

Incidentally, since the roll holder of the present invention is often installed in supermarkets and the like, in order to make it convenient to use, as shown in FIG. A support post 15 is erected and fixed on a table via a substrate, and a roll holder capable of holding a plurality of rolls R (two rolls in the illustrated embodiment) is attached to the support post 15 at an appropriate height position. It is convenient to provide one that is rotatably assembled around the support column 15.

In addition, 13 in FIGS. 1 to 4 is a cover for hiding the brake mechanism from the design requirements and for preventing the outer periphery of the roll R from coming into frictional contact with members such as the tension spring 10. When the cover 13 is installed upright on the base 1, it is fitted and fixed onto the base 1 by engagement with the piece 14 through a convex-concave relationship (not shown).

When using the roll holder of the present invention configured as described above, first, the roll R assembled on the core shaft 4 is moved from the core shaft 4 with the brake body 5 locked at the forward limit by the lock piece 12. Assemble the tape in the unwinding direction shown in FIG.

When the assembly of this roll R is completed, the lock piece 12
The setting is completed by releasing the locking of the brake body 5 and pressing the holding piece 7 of the brake body 5 against the roll R with a force according to the elasticity of the tension spring 10.

When the product is unwound from the roll R, broken, and used, in the case of the illustrated embodiment, simply grasp the tip of the thin film product and pull it out, and once the thin film product has been rewound by a predetermined amount, The product can be broken along the break line and separated into units for use.

During this unwinding and breaking operation of the thin film product, when a large amount of the thin film product is wound and the winding diameter of the roll R is large and the weight is relatively large, the braking force of the braking body 5 is strong on the roll R. This prevents the roll R from rotating more than necessary even though the rotational moment in the inertial motion is large.

From this state, as the winding diameter of roll R decreases as the thin film product is consumed, the braking body 5
The braking force for the rotation of the roll R also decreases, but the rotational moment of the inertial motion of the roll R itself also decreases, so even if the winding diameter of the roll R decreases and the braking force by the brake body 5 decreases, the roll Unnecessary rotation of R is prevented,
It is possible to maintain smooth unwinding and breaking operations of thin film products.

Furthermore, as the consumption of thin film products progresses and the winding diameter of roll R further decreases, just before the thin film products are used up, the braking force exerted on the roll R by the braking body 5 becomes significantly smaller than at the beginning. However, since the roll R itself has a sufficiently small winding diameter and is lightweight, and the rotational moment of the inertial motion of the roll R is extremely small, unnecessary rotation of the roll R can be sufficiently prevented.

In this way, the present invention reduces the braking force against the rotation of the roll R as the winding diameter of the roll R decreases. Excessive unwinding of the product can be prevented.

Furthermore, since the braking force acting on the roll R decreases as the winding diameter of the roll R decreases, the thin film product is always rewound with a nearly constant unwinding force regardless of changes in the winding diameter of the roll R. It becomes possible to use the

Further, since the surface of the presser piece 7 that comes into contact with the circumferential surface of the roll R is a smooth surface, the thin film product to be rewound can be used safely without being damaged.

In addition, in the present invention, the holder is not a plate material, but constitutes a basic frame by bending a metal wire material with a diameter of about 7 mm to 10 mm, and includes a sliding arm 6, a tension spring 10, and a bearing 3 as necessary. The entire structure may be constructed by fixing plate parts or the like that serve as mounting bases at key points.

As is clear from the above explanation, the present invention allows the pulling force of the thin film product to remain almost constant regardless of changes in the winding diameter of the roll R, and also eliminates the need for the roll R. It is possible to reliably prevent excessive rotation of the thin film product, thereby reliably preventing excessive unwinding of the thin film product, and as a result, stable unwinding and breaking operations can be obtained until the thin film product is used up.

Furthermore, the structure is simple, easy to implement, and easy to handle, etc., and has many excellent effects.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an embodiment of a roll holder according to the present invention. FIG. 2 is a plan view. FIG. 3 is a side sectional view. FIG. 4 is a rear view. FIG. 5 is an enlarged view of the bearing section. 6 to 9 are partial detailed views showing other embodiments of the presser piece. Fig. 10 is an enlarged detailed sectional view of the brake body locking mechanism;
The figure is a detailed sectional view showing another embodiment of the brake body locking mechanism. FIG. 12 is an overall perspective view showing a preferred embodiment of the roll holder according to the present invention. Explanation of symbols 1; Base, 2; Holding side, 3; Bearing, 4
Core shaft, 5; Braking body, 6; Sliding arm, 7; Holding piece, 8; Broken piece, 9; Guide piece, 10; Tension spring, 11;
Lock piece, 12; Lock piece, 13; Cover, 14; Assembly piece, 15; Support column, R; Roll.

Claims (6)

[Scope of utility model registration request] (1) A roll holder that rotatably and detachably supports and holds a roll R in which a thin film product to be broken and used for each use is wound around a core, the base 1 Both holding side surfaces 2, 2 are arranged to face each other, and the roll R is placed at a desired opposing position of both holding side surfaces 2, 2.
A bearing 3.3 for assembling and holding the core shaft 4, which is a shaft that supports the winding core through the winding core, is provided in the base 1 in a direction intersecting with the axis of the core shaft 4 that is installed and held in the base 1. A brake body 5 is slidably provided on the base 1, and the brake body 5 is connected to a sliding arm 6 which is a part for slidably assembling the brake body 5 to the base 1, and from the sliding arm 6 to the base 1. The position facing the circumferential surface of the roll R supported by the core shaft 4 and extending in the direction of standing up from the roller R is defined as a smooth surface that is parallel to the roll R and comes into contact with the circumferential surface of the roll R. Constructed from the pressed presser piece 7,
A roll holder in which a tension spring 10 is tensioned between the brake body 5 and the base 1 in such a direction that the contact surface of the presser piece 7 is pressed against the circumferential surface of the assembled and held roll R. . (2) The roll holder as set forth in claim (1) of the utility model registration, in which the surface of the presser piece 7 that comes into contact with the roll R circumferential surface is formed of an elongated pipe, bar, or plate. (3) The roll holder as set forth in claim (1), in which the surface of the holding piece 7 that comes into contact with the circumferential surface of the roll R is a roller having a rotation axis parallel to the core shaft 4. (4) The roll holder shown in claim (3) of the utility model registration claim, in which the roller has a large diameter portion formed in a gentle shape. (5) Utility model registration claim 0) (2) Any one of (3) in which the surface portion of the surface of the holding piece 7 that comes into contact with the circumferential surface of the roll R has a structure that exhibits a cushioning effect. Roll holder shown. (6) The contact portion of the presser piece 7 on the circumferential surface of the roll R in the drawer passage of the thin film product, which has a perforation or other breaking line in advance for each unit of use and is unwound and pulled out from the held roll R. Utility model registration claims (1) (2
) (3) A roll holder shown in any one of (5).