JPH0445045A - Film bobbin holder - Google Patents

Abstract

PURPOSE:To securely hold a bobbin in an action by holding the film bobbin with a chuck being expanded or contracted in a state of being inserted into a core tube, and making the expansion or contraction so as to be performed by way of letting plural jaws of the chuck rise or set by rotation. CONSTITUTION:A pair of chucks 11 is made retractable synchronously with a synchronous retractable mechanism 21, and they are inserted into a core tube of a bobbin B right and lest at the same time. If the chucks 11 are inserted into the core tube, three rotary jaws 12 in the chucks 11 are made into rising or setting by rotation. Each rotary jaw 12 is made up of forming a projection 12p at the tip of an L-shaped body part 12m, and it is projected out when a pressing body 15 presses a base end of the body part 12m by operation of a cylinder 14, thus an inner surface of the core tube is pressed and fixed under pressure. Therefore the core tube is fixed tight by only operation of the cylinder 14 of the chuck 11 synchronously entered in the core tube.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a film bobbin holding device for supplying packaging film to, for example, a packaging device.

[Prior art]

As a conventional film bobbin holding device 2, for example, one shown in FIG. 6 is known.

This film bobbin holding device 1 has a metal pipe 2 passed through a core tube (paper tube) C of a film bobbin B, and then a pair of chucks 4.4 having a tapered pressing surface 3 are used to hold the core. The tube C is held and positioned by pinching, and is used by placing it on a bearing 6 of a frame 5, and the pipe 2 rotates as the film is fed out 2.

That is, in this film bobbin holding device 1, when setting the film bobbin B, first
Pass the removed pipe 2 through the core tube C of the film bobbin B, and then insert the removed chuck 4 back into the pipe 2.
Then, adjust both chucks 4.4 in the direction of arrow A and fix both chucks 4.4 while performing positioning, that is, centering to match the mechanical center line of the device to which the film is fed. This requires the following work procedures.

Such work requires quite heavy pipe 2 and chuck 4.
In addition, accurate centering, which is a major factor in film processing on the equipment side to which the film is supplied, is quite troublesome.Furthermore, in order to improve workability, pipes 2 and chucks 4. It is quite a burden, as it is necessary to prepare in advance a plurality of film bobbins with 4 set.

[Problem to be solved by the invention]

However, recently there has been a strong desire to save labor, and automation of film consuming equipment has been greatly advanced. and,
As a result, the film bobbin holding device, which requires complicated operations as described above, has become unsuitable for the actual situation.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a film bobbin holding device that saves labor so that the operator only has to handle the film bobbin.

[Means to solve the problem]

Specifically, the film is expanded while inserted into the core tube of the film bobbin.
To provide a film bobbin holding device in which a pair of chucks which can freely hold and open a film bobbin by being compressed are disposed opposite each other, and both chucks are moved forward and backward in synchronization, and the chuck is It is equipped with multiple rotating claws, which rotate to extend the tip.
To provide a film bobbin holding device whose chuck can be expanded or contracted by sinking the film bobbin.

[For production]

This film bobbin holding device holds the film bobbin with a chuck that expands and contracts while inserted into the core tube of the film bobbin. Therefore, holding can be easily performed with one touch, and even if the core tube has some uneven length or damage, a reliable holding state can always be obtained, and centering accuracy can also be ensured.

Further, in this film bobbin holding device, the centering of the film bobbin is performed by synchronized movement and retraction of a pair of chucks. Therefore, when one chuck is brought closer in width, the other chuck is automatically brought closer in width, and a predetermined centering state can be easily obtained.

Therefore, setting the film bobbin in this film bobbin holding device can be as simple as positioning the film bobbin at the height of both chucks and, in this state, moving one chuck closer to the width.

Furthermore, when a chuck equipped with a rotating claw is used, the rotating claw protrudes by rotation and works to bite into the core tube of the film bobbin and pull it. This function contributes to holding the film bobbin and also functions as a width adjuster for the chuck, so that more reliable holding and more accurate centering can be performed.

〔Example〕

The present invention will be explained in detail below.

This film bobbin holding device 1o includes a pair of chucks 11, 11 (lla, 1l), as shown in FIGS.
b), and a synchronized movement mechanism 21 for synchronizing both the chucks 11a111b and moving them forward and backward as shown by the arrows.

As shown in FIGS. 4 and 5, each chuck 11 is equipped with three rotating claws 12 inside, and these rotating claws 12 rotate as shown by arrow E to extend and retract. It is supposed to be done. In other words, the chuck 11 expands and contracts by the extension and retraction of the rotary claw 12, and this expansion and contraction is performed within the core tube C of the film bobbin B, so that the film bobbin B can be held and opened. be.

The rotating claw 12 has a pressing protrusion 12p formed at the tip of an L-shaped main body 12m, and a bearing 13 attached to the base end, and rotates in the direction of arrow F according to the operation of the air cylinder 14. The bearing 1 is moved by the pressing body 15, which moves forward and backward as if
When the proximal end is pushed through 3, it rotates outward and protrudes.

As described above, this rotating claw 12 rotates outward and protrudes to press the core tube C of the film bobbin B from the inside, but at this time,
The pressing protrusion 12p comes to act on the core tube C with a force in the direction of drawing the chuck 11 toward the film bobbin B, that is, a force as indicated by arrow G. This means that the chuck 11 itself has a part of the function of adjusting the width of the film bobbin B with its own blade.

The protruding rotating pawl 12 is configured to rotate inward and retract by the urging force of a spring 16 when the air cylinder 14 stops.

The chuck 11 is connected to a slide block 25 of a synchronized advance/retract mechanism 21, which will be described later, via a support arm 7. Further, a bush 18 is interposed between the chuck 11 and the support arm 17, and the chuck 11 is moved together with the film bobbin B as the film is forcibly taken in by the film feeding device M. It is designed to rotate.

A contact plate 19 is attached to the chuck 11 in close proximity to the support arm 17, and this contact plate 19 has the function of guiding the film unwound from the film bobbin B and preventing it from meandering. There is.

As seen in FIGS. 2 and 3, the synchronized advance/retreat mechanism 21 is comprised of an advance/retract movement means 22 and a synchronized means 23.

The advancing/retracting means 22 is constructed by engaging a pair of slide blocks 25a and 25b in a stable state C with respect to a couple as shown by the arrow H, and the slide blocks 25a and 25b are connected to the slide rail 24. It is designed to move forward and backward while engaged with 24.

The tuning means 23 includes a rack gear 26a connected to one slide block 25a and a rack gear 26a connected to the other slide block 25a.
A thick pinion structure is used in which a single pinion gear 27 meshes with a rack gift '26b connected to the pinion gear 5b. However, the tuning means 5 is not limited to such a rack and pinion structure; for example, a chain sprocket structure or a similar structure can be adopted as appropriate.

In addition, 28 in the figure is a base, and the film bobbin holding device 1
0 will be attached via this base 28 to the device M to which the film is supplied.

Hereinafter, the setting operation of the film bobbin B in this film bobbin holding device 1o will be explained.

First, the film bobbin B is positioned at the height of the chuck 11. For this positioning, use an appropriate stand, or use an appropriate vertical movement means that can move up and down enough to absorb the difference in the diameter of the film bobbin B, or move the chuck 11 side up and down or rotate it. It is possible to

Next, in this positioning state, one chuck 11
are brought closer together until the contact plate 19 comes into contact with the side surface of the film bobbin B. Then, the other chuck 11 is also moved by the same width by the tuning means 23, and as a result, the film bobbin B is automatically positioned at the center of both chucks 11 and 1.1b, that is, at the center line on the side of the device where the film is fed. centering is performed automatically.

Then, in this state, the air cylinder 14 is operated. Then, the rotating claw 12 rotates outward and protrudes to hold the film bobbin B, completing the setting.

〔Effect of the invention〕

The film bobbin holding device according to the present invention is as described above, and has the following effects.

(a) The pair of chucks move forward and backward in synchrony, so if you bring the chuck closer together, the other chuck will automatically come closer together, making it easy to achieve a predetermined centering condition. can get.

(b) Since it uses a chuck that holds the film bobbin by expanding it when inserted into the core tube of the film bobbin, it can be easily held with one touch, and there is no need to worry about slight unevenness in the length of the core tube. By working together, fc), (a), and (b), which can always maintain a secure holding state even if there is damage and ensure centering accuracy, make it easier to set the film bobbin. All you have to do is handle it, which can save you a lot of labor.

(d) By using a chuck with 0-rotation jaws,
This rotary claw contributes to more reliable holding of the film bobbin and also functions as a width adjuster for the chuck, so that more reliable holding and more accurate centering can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a film bobbin holding device according to the present invention, FIG. 2 is a schematic side view seen from the direction indicated by the arrow in FIG. 4 is a schematic side view including a partial cross section of the chuck; FIG. 5 is a schematic side view seen from the direction of arrow V in FIG. 4;
FIG. 6 is a schematic side view of a conventional film bobbin holding device. lO-...Film bobbin holding device 11----
--- Chuck 12 --- Rotating claw 21 --- Synchronized advance and retreat mechanism B --- Film bobbin C --- Core tube diagram Fig. 721, 2・' Illusion/Fig.

Claims (2)

[Claims] (1) A pair of chucks that can freely hold and open the film bobbin by expanding and contracting when inserted into the core tube of the film bobbin are arranged in a state opposite to each other, and both chucks are moved forward and backward in synchronization. A film bobbin holding device made as follows. (2) The film bobbin holder according to claim 1, wherein the chuck is provided with a plurality of rotary claws, and the chuck is expanded and contracted by rotating the rotary claws to extend and retract their tips. Device.