JP3142384B2 - Film wrapping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a film winding apparatus for winding a wide tape-shaped film such as a stretch film around an article.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for automatically winding and binding a stretch film, for example, Japanese Patent Application Laid-Open No. 64-37 is known.
No. 317 is known. In a conventional apparatus of this kind, a rotating drum, a reel attached to the drum and rotating together to unwind the band-like film, two pairs of clamp members for holding both sides of the film, and cutting the film. It is constituted by a cutter.

When the film is wound, the drum is rotated with the end of the film held down by two pairs of clamp members,
Before the first rotation is completed, for example, when the rotation is half a rotation, the pair of clamp members on one side are opened to release the side of the film, and the pair of clamp members are moved out of the winding path of the film, and then the drum is rotated once. When turning, the other pair of clamp members are opened to completely separate the film. And
When the drum has completed the predetermined number of turns, the drum is stopped and 2
The pair of clamp members are advanced to hold down the film again, and the film is cut by the cutter to complete one cycle of winding.

[0004]

If the film is stretchable and self-adhesive like a stretch film and there is a certain amount of friction between the article on which the film is wound and the film, the film is preferably wound. However, if the self-adhesiveness of the film is weak or the surface of the item is slippery and the friction between the film and the surface of the item is small, the winding of the film is not performed well or the winding of the film is loose. And the like.

[0005] It is an object of the present invention to overcome the above-mentioned problems of the prior art, so that even if the self-adhesion of the film is weak or the surface of the article is slippery, the film can be properly wound. An object of the present invention is to provide a film winding device having a structure that can be performed.

[0006]

The film winding apparatus according to the present invention is characterized in that a drum 1 is rotatably driven and a reel which is fixed to the drum, rotates together and can store the film in a belt-like state. And a cutter 10 for holding the end of the film at least at the beginning of winding, and a cutter for cutting the film. Includes a member that holds down the film against cracks.

[0007]

The film is wound around the work by rotating the drum 1 with the end of the film held down by the clamping device. At this time, when the drum is slightly rotated, for example, at about a half rotation, the holding member is advanced and the film is pressed against the work to be held down. Further rotation of the drum causes the clamping device to open and retract to release the film, at which point the restraining member remains held down. When the drum has rotated a predetermined number of times, the restraining member retracts to release the film and then the clamping device advances to restrain the film, the cutter cuts the film, ending one cycle of winding.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show this film winding apparatus as a whole. As shown, a drum 1 is rotatably and substantially vertically installed at the center of the front of a machine frame or a main body. The drum is driven to rotate by the motor. At an appropriate position on the drum 1, a reel 2 for storing a film in the form of a strip or a wide tape is fixed, and the reel is rotated together with the drum and placed on a table 3. -Wrap the film around the article. Reference numeral 4 denotes a roller for rotatably supporting the drum 1.

A structure in which a tape or a string is wound around the rotary drum 1 provided with the reel 2 is known as a type of a binding machine, and the description of the mechanism is omitted. Usually, the drum 1 is covered with a guard 5 made of a mesh on the periphery and the back. The apparatus is supported by four wheels 6 attached to the bottom and is configured to be movable.

[0010] The film winding apparatus is provided with a clamp device 10 for suppressing the end of the film at the beginning of winding.
The clamping device preferably comprises two pairs of clamping members 11,
12, 13, and 14. Further, a cutter 7 having a saw-toothed blade for cutting the film when the film has been wound is provided. These clamp members and cutters are operated in an interlocking relationship with the rotary drum 1, that is, at a predetermined timing.

FIGS. 3 and 4 illustrate the restraining member 8 and its associated features which characterize the present invention, which, as shown, preferably comprises a thin plate, and preferably Provided near the clamp member. FIG. 3 shows the state before the end of the film F is held by two pairs of clamp members and the winding operation is started. Each clamp member is configured to be able to advance and retreat, and one of each pair of clamp members, in the illustrated example, clamp members 11 and 13.
Are rotatable.

In order to allow the clamping members 11 and 12 to advance and retreat, the clamping member 11 is pivoted by a pin 17 to a slider 16a connected to an air cylinder 15a, and the clamping member 12 is moved to a slider 16b connected to an air cylinder 15b. And the sliders are supported on a common rail 18. A spring 19 is attached to the clamp member 11 so as to rotate and open the clamp member 11 with the pin 17 as a fulcrum with respect to the clamp member 12, and the clamp member 11 abuts against the clamp member 11 to close the clamp member in the closing direction. Is installed.

Further, the clamp members 13 and 14 are formed on the base 2
1 and is disposed so as to be able to advance and retreat via an appropriate guide,
The clamp member 13 is connected to the air cylinder 22, and the clamp member 14 is connected to the air cylinder 23, respectively, and is advanced and retracted by those air cylinders. The clamp member 13 is pivotally supported by its support guide 25 by a pin 24 to pivotally open and close with respect to the clamp member 14, and a spring 26 is attached to the clamp member 13 to resiliently open the pin 24 as a fulcrum. . In this example, the clamp member 14
When the projection 14a of the clamp member 13 abuts against the step 13a of the clamp member 13, the clamp member 13 closes against the elasticity of the spring 26.

As shown clearly in FIG. 4, the member 8 is fixed to a rotatable shaft 27 and supports the shaft.
By moving the member 8 back and forth on its base 29, the member 8 is advanced or retracted into the film winding path. For the operation of the support member 28, there is provided a right-angled lever 31 pivoted by a pin 30, one end of which is connected to the air cylinder 32 and the other end of which is a notch 31a.
Is connected to the support member 28 by receiving the pin 28a of the support member. Lever by air cylinder 32
When the member 31 rotates in the direction of arrow a, the member 8 moves backward together with the support member 28.

The member 8 comprises a spring 3 mounted on its shaft 27.
In the example shown in FIG. 3, the film F is moved downward, receives a force separating from the work, and applies a force in the opposite direction to hold the film F against the work by the member 8. Therefore, in this embodiment, a right-angled member 34 that can abut the member 8 on one side is provided.
At one end and connected to the air cylinder 35 at one end. The other end of the member 34 abuts on the holding member 8 and the member 8
Is pivoted upward to hold the film.

FIG. 5 shows each operation stage of the apparatus. FIG. 5A shows a state in which the work A is placed on the table 3 and immediately before the film F is wound. The main part is in the state shown in FIG. When the drum 1 rotates a quarter turn, the film 8 is held down by the member 8 as shown in (b). That is, at this stage, as shown in FIG. 6, the clamp members 11, 12, 13, and 14 of each pair maintain the state where both sides of the film are held, and the air cylinder 3
By the operation of 2, the lever 31 is rotated in the direction opposite to the arrow a (FIG. 4) to advance the member 8, and at the same time, the member 8 is pivoted upward via the member 34 by the operation of the air cylinder 35.

When the drum 1 is further rotated, for example, by a half rotation or more as shown in (c), the holding of the film by the pair of clamp members is released. At this stage, as shown in FIG. 7, the clamp member 11 is retracted together with the slider 16a by the air cylinder 15a and the clamp member 12 together with the slider 16b by the air cylinder 15b.
And open with the resilience of the spring 19, releasing the part of the film on that side.

Next, when the drum 1 makes one or more rotations as shown in (d), the other pair of clamp members also release the film, so that at this stage, the film is held only by the holding member 8. That is, as shown in FIG.
When the clamp member 13 is retracted by the air cylinder 22, the clamp member 13 is rotated and opened by the elastic force of the spring 26, and then the air cylinder 2 is opened.
3, the clamp member 14 is also retracted, and each of the clamp members comes off the winding path of the film, so that the film is preferably wound.

When the drum 1 has rotated a predetermined number of times and the film has been wound around the work A, the film is held by a clamping device as shown in FIG. FIG. 9 illustrates this stage, in which the two pairs of clamp members are advanced by respective air cylinders, and the clamp members 11, 13 are closed by abutment with the stopper 20 or the projection 14a, and each side of the film is Hold the part. Thus, two pairs of clans
Film members are placed opposite each other across the film
Of each side of the film and operate at right angles to the longitudinal direction of the film,
Retracts while stretching the film in the width direction in contact with the film
So even if it is a flexible film,
Or wrinkles in the film, or the film
The advantage that it can be wound properly without protruding from the lum
There is.

FIG. 5 (f) shows the final stage. At this stage, as shown in FIG. 10, the holding member 8 retreats to the original position to release the film, and then the slider 16b
The cutter 7, which is supported by the clamp member 12 and is in the advanced position together with the clamp member 12, pivots, i.e., pivots to a position 7 'across the film about the fulcrum 7a by the actuator 36 of the cutter to cut the film. I do. Next, the cutter 7 is moved back to the original position, and one cycle is completed.

In the above embodiment, the operation of each of the clamp members and the holding members is performed by the air cylinder. However, it goes without saying that another linear drive device may be used instead. In the case of a flexible film such as a stretch film, two pairs of clamping members are preferable because they can hold both sides of the film. However, depending on the type of the film or the holding position of the film, a clamping device may be used. May be constituted by a pair of clamp members.

[0022]

As described above, according to the present invention, the film is held at the end by the clamping device and is also held down by the holding member. Is suppressed by
The film does not become loose during the winding process,
In addition, even if the film does not have self-adhesiveness, it can be appropriately wound. Also, the film can be wound without sufficient friction between the work and the film,
The film can be satisfactorily wound regardless of the film material and the type of work.

[Brief description of the drawings]

FIG. 1 is a front view of a film winding device according to an example of the present invention.

FIG. 2 is a side view of the same device.

FIG. 3 is a perspective view showing a main part of an example of the device according to the present invention.

FIG. 4 is a perspective view showing a holding member of the main part and an operation mechanism thereof.

FIGS. 5 (a) to (f) are diagrams schematically showing each operation stage of the device of the present invention.

FIG. 6 is a perspective view showing a state of a main part corresponding to a stage (b) of FIG. 5;

FIG. 7 is a perspective view showing a state of a main part corresponding to a stage (c) in FIG. 5;

FIG. 8 is a perspective view showing a state of a main part corresponding to the stage (d) of FIG. 5;

FIG. 9 is a perspective view showing a state of a main part corresponding to the step (e) of FIG. 5;

FIG. 10 is a perspective view showing a state of a main part corresponding to the step (f) of FIG. 5;

[Explanation of symbols]

 Reference Signs List 1 rotating drum 2 reel 7 cutter 8 holding member 10 clamping device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-37317 (JP, A) JP-A-63-218015 (JP, A) JP-A-3-176318 (JP, A) 174008 (JP, U) (58) Fields studied (Int. Cl. ⁷ , DB name) B65B 49/12 B65B 11/00-11/04

Claims (2)

(57) [Claims] 1. A drum which is driven to rotate, a reel which is attached to the drum, rotates together and stores the film in a state capable of unwinding a belt-like film, a clamping device for holding down the film, and In a film winding device including a cutter for cutting, the film is further advanced to a winding path of the film at an initial stage of winding the film to hold the film against an article and to hold the film even after the clamping device releases the film. A film winding device comprising a member adapted to continue. 2. A film winding apparatus according to claim 1, wherein said clamping device comprises two pairs of clamping members, said pair of clamping members being on one side of said film and of another pair. Clamp members are adapted to restrain the other side of the film, and their pair of clamp members are disposed oppositely across the film and advance and retreat in a direction perpendicular to the longitudinal direction of the film. Film wrapping device.