JPS6133432A - Film takeout device in film interchanger for x-ray apparatus - Google Patents

Abstract

PURPOSE:To take out securely a film in an apparatus for taking out the film at every revolution of a cam shaft, by constituting one of conveyer rollers to jump in interlocking relation with the cam shaft when the film is adsorbed to be sent out toward a pair of the conveyer rollers. CONSTITUTION:When a cam shaft 40 is rotated counterclockwise by a motor, a link 14 is rotated about a shaft 17 through a follower 42 by a cam 41 to lift a bed 30 having a pad 4 adsorbing a film F through a link 25. When the pad 4 is lifted to a predetermined position, an arm 16 is rotated through a follower 44 by a cam 43 to advance the bed 30 through parallel links 13, 14 so that a leading end of the film F adsorbed by the pad 4 is included between feed rollers 6, 7. Then, an arm 52 is rotated about a shaft 53 through a follower 54 by a cam 51 so that the roller 6 is separated from the roller 7 to hold the film F securely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] This invention relates to a film take-out device for a film exchanger for an X-ray apparatus that takes out cut films one by one and feeds them to a conveying roller.

[Background of the invention]

The method of taking out the cut film one by one and feeding it to the conveying rollers is as follows: (1) Just before the front end of the film attracted to the hat reaches a pair of rollers consisting of a driving roller and a driven roller, the roller is flipped up by a magnet, and the film is moved between the rollers. Provide a gap and insert the film here.

(2) A one-way clutch is provided on the drive roller, and when the front end of the film hits the contact portion of the roller, the roller is pushed and rotated, and the film is inserted.

The following three methods are used as examples.

However, method (1) requires film detection, an electric control circuit based thereon, an operating power source, and a magnet in order to operate the magnet, and the device as a whole has drawbacks such as being complicated, expensive, and unreliable.

In addition, in method (2), in order to overcome the rotational resistance of the roller and insert the film, the force of the vacuum suction pad is strengthened, and the insertion position of the front end of the film is precisely aligned with the contact part of the roller. The former results in the film being indented, while the latter has the disadvantage that it requires high parts precision and adjustment precision, and that the film does not have any bends.

[Purpose of the invention]

An object of the present invention is to flip up one of the pair of conveying rollers (the driven roller) when inserting the film attracted by the pad into the conveying roller without using a detection device, an electric control drive device, a magnet, etc. To provide a film take-out device of a type in which a gap is created between the film and the film, the film is inserted between rollers without giving resistance, and then the film is held by bringing a pair of rollers into contact with each other.

[Summary of the invention]

In the present invention, the camshaft rotates once to rotate the film once.
In the sheet take-out device, one cam is further provided, and just before the film adsorbed on the pad advances toward the conveyance roller, one of the conveyance rollers is lifted up, and immediately after the advance is completed, it is lowered, and the film is It is characterized in that the material is securely sandwiched and then transported.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the film take-out device of the present invention will be described below with reference to the accompanying drawings.

In the drawings, reference numeral 1 indicates a film magazine. The unshot cut film bottoms are stacked and stored in this film magazine. The film take-out device 3 is arranged on the film magazine. To take out the film, a vacuum pad 4 included in the device 3 is brought close to the cut film, adsorbs the cut film when it comes into contact with it, is then separated from the remaining film, and is rotated back and forth during the separation. Rollers of the conveying device 6.
7, the film is inserted between the rollers, the suction is released, and the film is returned onto the film magazine.

The film removal device itself includes the vacuum pad, linkage means for effecting these movements on the vacuum pad, and cam means for actuating the linkage means.

The linking means comprises two sets of parallel links located along opposite edges of the film magazine. The - set of parallel links consists of links 11.12, and the - set of parallel links consists of links 13.14. Two arms 15, 3.6 are arranged on the outside of each parallel link, and are fitted and fixed to a shaft 17 whose ends are held in bearings on a dark box that shields the device 3 and the film magazine 1. has been done.

One link 11.13 of each parallel link is in each case connected to an arm 15.16 by a pin 18.19, and the other link 12.14 is suspended on the shaft 17. On the other hand, a stand 30 is placed above the cut film and across it. Place the vacuum pad 4 on a cigarette stand, facing the cut film. Although not shown, each vacuum pad is connected to a vacuum pump on the dark box through a flexible tube, and a valve between these pads sucks air into the internal space and blows air into the internal space. It has become so.

This platform 30 has arms 15 . in each set of parallel links.
At the end opposite to the side connected to 16, it is supported by link means described below.

The shaft 23 is arranged transversely to the film magazine.

Links 12,14 of each parallel link are suspended on this axis. The link 24 is arranged inside the link 12 and is loosely supported by the shaft 23. Further, the link 25 is arranged between the links 13 and 14, is connected to the link 13 by a pin 26, and is allowed to rest on the shaft 23. The opposite ends of these links are rested on an axle 27 located across the film magazine. A stand 30 supporting the vacuum pad is fitted and fixed to the end of the shaft 27 with members 28, 29 fixed thereto.

The member 28 on the platform 30 is configured as a bell crank. This bell crank is fixed to its rotating center metal shaft 27, and its negative side is connected to a stand 30. Also, link 1
A bell crank 31 is also arranged on the outside of 1.12.

The center of rotation of this bell crank is engaged with and fixed to the shaft 23, and the - side is connected to the link 11 by a pin 32. The other side of each bellcrank is connected to the link 33 by a pin 34,35.

A camshaft 40 is positioned below each parallel link and across the film magazine, and is held at both ends in bearings on the dark box. The cam 41 is connected to the links 13, . 14 and is fixed to the camshaft, and is in contact with the follower 42 on the link 14. The cam 43 is located outside the arm 16 and fixed to the camshaft, and is brought into contact with a follower 44 on the arm 16. The cam 45 is located outside the arm 15 and is fixed to the camshaft.
It is brought into contact with the follower 46 located at 5.

The camshaft is rotated by an electric motor installed in the dark box.

When each cam is rotated counterclockwise in FIG.
The cam portion 41a of link 1 interposes the follower 42°
4 around axis 17. At the same time, the link 12 is rotated by the same angle through the shaft 23, and the stand 30 is rotated by the same angle.
rises. The pad 4, which is pressed against the film and has attracted the film, is thereby lifted up.

During the lift of the vacuum pad, the pad is rotated back and forth about axis 27. The cam 45 is for this purpose, and a cam portion 45a of the cam 45 rotates the arm 15 with a follower 46 interposed therebetween. As a result, link 11 is pulled and bell crank 3
1 rotates on the shaft 23, the link 33 is pulled, the bell crank 28 rotates together with the shaft 27, the platform 30 is rotated about the shaft 27, and the pad 4 is rotated. The films attracted to the pad are shaken by this, and all but one film fall into the film magazine.

During this period, the vacuum pad continues to rise, and when the band rises to a predetermined position, the cam portion 43a of the cam 43 moves to the follower 4.
4 to rotate the arm 16. Since the arm 15 is fixed to the shaft 17, it is rotated by the same angle as the arm 16. The parallel links 11.12 and 13.14 are moved forward, and the table 30 is also moved forward, so that the leading edge of the film adsorbed on the pad is transferred to the feed roller 6.7 of the conveying device.
being held in its mouth. At this time, the film is on roller 6.7
The space between the rollers 6 and 70 is temporarily opened to ensure that the object is held in the mouth. That is, a cam 51 fixed to a cam shaft 40, an arm 52 rotatably supported by a support shaft 53, and a roller 5 at one end of this arm 52.
A shaft 55 that rotatably supports 4 is fixed. The other end is joined to support a shaft that supports the roller 6 . The roller 54 is always connected to the cam 5.
1. Further, the roller 6 is pressed against the roller 7 by a spring (not shown). However, the roller 54 is in the recess 51 of the cam 51.
When the arm 52 comes into contact with the convex portion 51b from the position a (the roller is not in contact with it), the arm 52 rotates by a predetermined amount, thereby flipping up the roller 6 and creating a gap between it and the row 27.

The shape of the cam 51 is formed so that these steps are performed just before the table 18 moves forward, and the cam 51 descends immediately after the table 18 moves forward. These positional relationships are shown in FIG. Film is on roller 6
．． At the same time as the film is held in the film by the rollers 6 and 7, the suction of the pad is released and the film is conveyed by the rollers 6 and 7.

After the film is fed to the rollers 6.7, the cam 43
cam portion 43b rotates the arm 16 in the opposite direction through the follower 44, thereby causing the parallel link 11.12
and 13.14 are set back. When the retraction is completed, the cam portion 41b of the cam 41 reverses the link 14, the vacuum pad descends together with the platform 18, and the cam shaft connecting the pad to the film continues to rotate.
The next film is fed out onto the rollers again. Note that during this return movement, since the cam portion 45a of the cam 45 is in contact with the follower 46, the pad 4 returns to its original position without reciprocating rotation.

〔Effect of the invention〕

Even without a film position detection device, electric control drive circuit, magnet, etc., it is possible to reliably and reliably insert the film after flipping up the driven roller of the transport roller pair, and immediately lowering the roller to hold the film. can be realized at a low price.

[Brief explanation of drawings]

The drawings show an embodiment of the film take-out device of the present invention, and FIG. 1 is a front view, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1, and FIG. 5 is a cross-sectional view taken along line ■-■ in FIG. Sectional view along the line, 4th
The figure is a perspective view, and FIG. 5 is an explanatory diagram of the operation of the roller and pad. 4... Vacuum pad, 11.12... Second parallel link, 13.14... Second parallel link, 15... First arm, 16... Second arm, 30...・Table, 24
．． 25... Carrying link, 28... First bell crank, 31... Second bell crank, 33... Control link, 51 20th 3a 5th rotation angle C

Claims (1)

[Claims] 1. In a cut film take-out device consisting of a combination of a cam, a link mechanism, and a vacuum pad, which takes out one sheet from a stack of cut films each time the cam rotates, when the film is delivered to a pair of conveyance rollers. Then, just before the film advances, the driven roller is flipped up to create a gap between it and the driving roller to facilitate insertion of the film adsorbed onto the pad between the rollers, and after the insertion is completed, the rollers are brought into contact immediately; A film take-out device for a film changer for an X-ray device that securely holds the film between rollers.