JPH05147130A - Clamp device of striplike raw paper in a spiral paper pipe winder - Google Patents

Abstract

PURPOSE:To provide a clamp device constituted so as to facilitate the escape of a finger by rapidly slackening the tension of a belt even when an accident such that the finger is taken up by the belt is generated. CONSTITUTION:A mechanism shortening the distance between two pulleys 2 having a belt trained thereover under tension in a spiral paper pipe winder and imparting tension to the belt 4 using an operation piece or a toggle mechanism 12 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a belt-shaped base paper tightening device for a spiral paper winding machine.

[0002]

2. Description of the Related Art Generally, a spiral paper tube is sequentially manufactured by winding a plurality of layers of band-shaped base paper, one or both sides of which are coated with glue, around a core fixed to a core core and tightening them with a tightening belt. It That is, the spiral paper tube forms a tube by spirally winding a strip-shaped raw paper, and the strip-shaped raw paper is fed so as to be obliquely wound around a winding core, and is manufactured while sliding the winding core.
The tightening belt is stretched around two pulleys arranged on both sides of the winding core, and is wound around a winding core existing between the two pulleys to be inserted between the winding core and the tightening belt. It is used to make pipes while tightening the strip-shaped base paper.
A tensioning device is provided for adjusting the distance between the two pulleys in order to apply tension to the tensioning belt. An endless belt is generally used as the tightening belt, and two pulleys around which the belt is stretched are supported by a frame so as to be positioned obliquely with respect to the winding core.

[0003]

As described above, since the tightening belt to which the tension is applied is an indispensable element in manufacturing the spiral paper tube, it has been a cause of frequent accidents. For example, when inserting a band-shaped base paper between a tightening belt and a core, a worker's hand or arm is inadvertently pinched, a finger is cut, or a traumatic accident such as a broken arm is repeated. It was

In the conventional spiral winding machine, generally, several workers work as a group to perform supply of raw paper, gluing work, winding work, cutting work after manufacturing a spiral paper tube, and the like. In this case, if an accident such as getting your hands caught in the winding work,
Safety push button switches were installed in various places of the winding machine, and in the event of an accident, not only the person himself / herself but other workers pressed the safety push button switches to stop the drive motor. However, since the tension belt is still tensioned, there is a drawback that it is impossible for an operator to immediately pull out even if the operator's hand is caught, and it is not possible to quickly respond to an accident.

[0005]

Therefore, the present inventor has achieved the present invention as a result of earnest research in view of the above problems, and is characterized in that the core fixed to the core stand. A device for spirally winding a strip-shaped base paper on two rolls, wherein two pulleys are provided on both sides of the core and at least one of which is driven to rotate by a motor, and the strip-shaped base paper is sequentially wound around the core. It comprises a tightening belt stretched over one pulley and a tightening device for adjusting the distance between the two pulleys and applying a tension to the tightening belt, the tightening device including an operating piece connected to a driving means. It is a device for interposing and tightening, and a device for loosening the tension of the tightening belt by moving the actuating piece by the driving means, or for winding the belt-shaped base paper in a spiral shape on the winding core fixed to the winding core stand. Yes, both sides of the core Two pulleys are provided, at least one of which is driven to rotate by a motor, and a tightening belt that is wound around the core in sequence and is stretched around the two pulleys. The two pulleys are driven. It is connected via a toggle mechanism connected to the means.

The term "core" as used herein means
It refers to a cylindrical or columnar member fixed to a winding core stand, which is wound around the belt-shaped base paper while being spirally slid to form a paper tube.

The "tightening belt" refers to a belt in which a band-shaped raw paper is wound around a winding core and polymerized. This belt is stretched around two pulleys, at least one of which is arranged on both sides of the winding core and is rotationally driven by a motor, and a part of which is wound around the winding core. The strip-shaped base paper is wound around the belt and the winding core in order and spirally wound into a paper tube. That is, the spiral paper tube is formed by the tightening belt rotating while sliding on the winding core. For this reason, it is necessary to apply tension to the tightening belt, and a tightening device for adjusting the interval between the pulleys so as to correspond to the inner diameter and wall thickness of the paper tube to be manufactured. The tightening device may be any device as long as it can move and fix the pulley, and may be provided only on one pulley, or may be provided on both pulleys and operated individually or simultaneously. As the tightening device, for example, a method in which a screw shaft is rotated by a feed screw mechanism to move the pulley, or two pulleys may be connected by a toggle mechanism.

The term "actuating piece" refers to an intervening piece when the tensioning device applies tension to the tensioning device. That is, when tightening by the tightening device, the tightening by the tightening device is released by moving the operating piece. The operating piece may be, for example, a plate-shaped plate or a cam, which is clamped by a clamping device. Pulling out the plate in the tightened state,
By rotating the cam, the tightened state is released and the tightening belt is loosened. The actuating piece is moved by an actuator, for example, a driving means such as an air cylinder. The driving means is operated by a sensor that detects an abnormal current of a push button switch or a pulley driving motor, or an infrared sensor that detects the body temperature of a human body when it approaches the tightening belt. Therefore, when a worker or the like pinches a finger or the like on the tightening belt, or when there is a possibility of being caught, the tightening belt can be loosened by the above-described switch, sensor or the like to minimize damage.

The "toggle mechanism" is a mechanism for generating a large force on the free end side of the links by pressing the connecting points of two links connected in a dogleg shape. Uses this mechanism to connect two pulleys and adjust the distance between the pulleys. That is, tension is applied to the tightening belt while the two links of the toggle mechanism are extended, and in an emergency, the tightening belt is loosened by pulling (or pushing) the connecting portion of the links. When the toggle mechanism is used, the distance between the pulleys can be fixed at an arbitrary position, and thus the pulley can be used as a tightening device, but a separate tightening device may be used together. The operation of the toggle mechanism is also performed by the driving means such as the air cylinder described above.

Any method may be used to connect the two links of the toggle mechanism to the pulley side, and the connecting portion may be any portion as long as it supports the pulley. It may be the shaft of the pulley or the drive box under the pulley. Also,
In the case of a drive box or the like, it may be at any position on the drive box, and it may be a location that does not interfere with other mechanisms.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

FIG. 1 is a plan view showing an example of a spiral paper winding machine 20. The endless belt 4 suspended on the pulley 2 and applied with a constant tension twist-polymerizes the band-shaped base paper B already glued to the core 1 fixed on the core fixing base 3 to form a pipe. While being extruded in the direction of the arrow, the paper tube A is manufactured.

As shown in FIG. 2, the pulley 2 is rotated by the pulley drive shaft 15 by the power transmission from the drive motor 11. An endless belt 4 is suspended around the pulley 2 and a constant tension is applied to the base paper B provided on the side of the winding core 1 in order to sequentially twist and polymerize the base paper B. The tension of the endless belt 4 is indispensable for producing the paper tube A by sliding the strip-shaped base paper B on the winding core 1.

The pulley 2 is constructed so that the drive box 6 supporting the pulley 2 can be freely adjusted in distance with respect to the winding core 1 by a rotary operation handle 8 connected to the screw shaft 7 and the outside. Tension is applied to the endless belt 4 suspended on the pulley 2 by turning the rotary operation handle 8. The endless belt 4 is tightened by sandwiching the step piece 5 inside the rotary operation handle 8.

As shown in FIG. 3, the step piece 5 is located at a position 5a where the step piece 5 has a large step during normal pipe making, but in an emergency, the step piece 5 moves to a step 5b where the step is small. Step difference Δt
= T1-t2 is generally 2 depending on the size of the spiral winding machine.
0 mm to 50 mm is sufficient. In order to move the step piece 5, the actuator 10 directly connected to the step piece 5 is used.
This is due to air pressure, hydraulic pressure,
Any method such as an electric magnet is possible.

FIG. 4 shows another example of the present invention, in which two pulleys 2 are connected via a toggle mechanism 12. The drawing shows a state in which the distance between the two pulleys 2 is narrowed and the endless belt 4 is loosened. In this state, the actuator 4 is operated to extend the two links 13 and widen the gap between the two pulleys 2 to apply tension to the endless belt 4. In this example, the toggle mechanism 12 applies tension to the endless belt 4, but when adjusting the tension, the operation amount of the actuator 10 may be adjusted, or the two links 13 may be connected. You may make it provide the stopper which adjusts the stop position of a connection part.

The length of the link 13 may be adjustable. For example, a turnbuckle or the like may be attached to the link. In this example, the link 13 is located above the gearbox, but depending on the size of the gearbox, the linking position between the link and the drive box 6 may be moved to the front side.

FIG. 5 shows another example in which the toggle mechanism 12 is used, in which the toggle mechanism 12 provided with a turnbuckle in the middle is vertically attached. In this example, the connecting portion between the link 13 and the drive box 6 is provided so as to be horizontally offset with respect to the pulley drive shaft 15 so as not to interfere with the power transmission portion (gear box) of the pulley drive shaft 15. Further, the attachment portion of the link 13 may be a side surface on the front side of the drive box.

Two toggle mechanisms 12 may be connected and provided as shown in FIG. By providing the toggle mechanism 12 separately, the power transmission part of the pulley drive shaft 15 can be avoided, so that it can be installed directly below the pulley drive shaft 15. In this case, since each toggle mechanism 12 connects one link 13 to the fixed portion, the actuator 10 is swingably provided.

Further, as shown in FIG. 7, the link 13 of the toggle mechanism 12 may be connected to the sliding frame 14 which supports the drive box 6. The drive box 6 is
Since it is moved by the screw shaft 7 with respect to the sliding frame 14, fine adjustment can be performed with this.
If the tension is set in advance, it is possible to always obtain a constant tension only by operating the toggle mechanism 12, and there is an advantage that the tension setting operation can be omitted at the time of starting.

The actuating piece 5 and the toggle mechanism 12 are actuated by pushing the push button switch 9 by an accidental person or other worker to actuate the actuator 10 as a driving means.
To drive. In addition, other drive motor 1
There is a method of detecting the abnormal current of No. 1. This is a method in which the load current of the drive motor 11 is almost constant during pipe making, but if an operator's hand or arm is caught, an abnormal current flows and the actuator 10 is driven by detecting this. is there. Further, when the worker approaches the dangerous area near the endless belt 4, the infrared ray may be used to detect the temperature of the human body. Of course, it can be performed by using a photoelectric tube, and it becomes possible to achieve safety by connecting to various detectors.

The tension of the endless belt 4 can be relaxed by the above-mentioned switches and various detectors. In conjunction with this, the driving motor 11 is stopped at the same time, or the electromagnetic clutch or the like is actuated to move the pulley 2. It is preferable to stop the rotation.

[0023]

As described above, the belt-shaped base paper tightening device according to the present invention is configured to loosen the tension of the tightening belt when a hand or arm is caught between the tightening belts or there is a risk of being caught. Therefore, even if an accident should occur, the entrapment can be immediately released, which has a very beneficial effect of being able to quickly deal with the accident without causing a major accident.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a spiral paper tube winding machine using the device of the present invention.

FIG. 2 is a side view showing a tightening device portion of the device of the present invention.

FIG. 3 is a side view showing an example of a step piece.

FIG. 4 is a plan view showing another example of the device of the present invention.

FIG. 5 is a side view showing still another example of the device of the present invention.

FIG. 6 is a side view showing still another example of the device of the present invention.

FIG. 7 is a side view showing still another example of the device of the present invention.

[Explanation of symbols]

 A Paper tube B Belt-shaped base paper 1 Core 2 Pulley 3 Core fixing base 4 Endless belt 5 Step piece 6 Drive box 7 Screw shaft 8 Rotation operation handle 9 Push button switch 10 Actuator 11 Drive motor 12 Toggle mechanism 13 Link 14 Sliding Frame 15 Pulley drive shaft

Claims (2)

[Claims] 1. A device for spirally winding a band-shaped raw paper on a winding core fixed to a winding core base, and two pulleys disposed on both sides of the winding core, at least one of which is rotationally driven by a motor. The belt-shaped base paper is sequentially wound around the winding core, and includes a tightening belt stretched around the two pulleys, and a tightening device that adjusts a distance between the two pulleys and applies tension to the tightening belt. The tightening device is for tightening by interposing an operating piece connected to a driving means, and the tension of the tightening belt is relaxed by moving the operating piece by the driving means. A device for tightening strip-shaped base paper in a winding machine. 2. A device for spirally winding a strip-shaped base paper on a winding core fixed to a winding core base, and two pulleys disposed on both sides of the winding core, at least one of which is driven to rotate by a motor. The belt-shaped raw paper is wound around the core in order, and comprises a tightening belt stretched around the two pulleys, and the two pulleys are connected via a toggle mechanism connected to a driving means. A device for tightening strip-shaped base paper in a spiral paper winding machine.