JPH02225226A - Suction panel device - Google Patents

Abstract

PURPOSE:To prevent suction trouble by sucking a sheet by a suction means which does not need vacuum supplied from outside. CONSTITUTION:A suction panel device 28 is equipped with an sucking panel shaft 30 and a suction panel 35 having a parabola-shaped recessed part 36 fixed at the top edge of the suction panel shaft 30. An air bent hole 51 for the communication between the recessed part 36 and the outside is formed on the suction panel shaft 30, and a valve shaft 40 which freely opens and closes the air vent hole 51 is inserted onto the sucking panel shaft 30, and when the sheet sucked by the sucking panel 35 is lifted and shifted to a prescribed position, a stopper member 50 installed onto a fixed frame 6 contacts the valve shaft 40, and the valve shaft 40 is pushed, and the air vent hole 51 is opened to supply outside air into the suction panel recessed part 36, and the suction of the sheet is released. Since the vacuum is used for the sucking means, the simple device is obtained free from suction errors.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a suction cup device used in a sheet feeder, etc., which picks up stacked rectangular sheets one by one from the top and feeds them forward. It is something.

(Prior art) In a conventional sheet feeder suction cup device, a suction cup is provided on a swinging arm that swings back and forth with respect to the sheet, and the suction cup sucks the sheet and moves the sheet forward by swinging the arm. It was something to send out. The suction cup used externally supplied vacuum to adsorb the sheet and release the adsorption (for example, U.S. Pat. No. 3,352,216
(see specification).

(Problems to be Solved by the Invention) The conventional suction cup device described above is provided with a plurality of suction cups, but if the vacuum piping is clogged or the vacuum holes of some of the suction cups are clogged with dirt, the suction cup will be damaged. This resulted in no adsorption action, which caused misfeeds to occur due to uneven adsorption force.

The present invention has been made in view of the above-mentioned problems, and its purpose is to prevent suction errors by suctioning sheets using suction means that does not require external vacuum supply. An object of the present invention is to provide a suction cup device that has the following features.

(Means for solving problems) In order to achieve the above object, the present invention has taken the following measures.

That is, the present invention is characterized by having a suction cup shaft and a suction cup having a parabolic recess fixed to the tip of the suction cup shaft,
The suction cup shaft has a ventilation hole that communicates the recess with the outside, and a valve shaft that allows the ventilation hole to be opened and closed is inserted through the suction cup shaft, and when the sheet that has been sucked by the suction cup is lifted and moved to a predetermined position, it is fixed. The stopper member provided on the side comes into contact with the valve stem to push the valve stem, open the ventilation hole, supply outside air to the suction cup recess, and release the suction of the sheet.

(Function) According to the present invention, when the suction cup provided at the tip of the suction cup shaft is pressed against the sheet, the suction cup is deformed, the air in the parabolic recess is removed, and the sheet is attracted to the suction cup. Then, by lifting the suction cup, the sheet is lifted.

To remove the seat from the suction cup, use the stopper member to push the valve stem, open the ventilation hole, and communicate the suction cup recess with the outside.
The pressure inside the suction cup recess is brought to atmospheric pressure to release the suction.

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Figure 2 shows medical fault X! FIG. 2 is a front view of a film autoloader (2) attached to an I-photograph (1).

This film autoloader (2) takes out films one by one from a set magazine (3) containing rectangular films, transports them to the shooting position, and after shooting, stores the films in a receive magazine (4). be.

FIG. 3 shows the detailed structure of the film autoloader (2), and the autoloader (2) is provided with a sheet feeder (5).

The film autoloader (2) has a box-shaped frame (6), and the front side of the frame (6) has a set magazine insertion hole (7) and a receive magazine insertion hole (
8) are opened one above the other, and these holes (7), (
8) is covered with covers (9) and (10) that can be opened and closed. The covers (9) and (10) automatically open when a magazine is inserted, and automatically close when the magazine is removed, keeping the inside of the frame (6) in a dark room.

A set magazine (3) inserted into a set magazine insertion hole (7) located above stores unused rectangular sheet-like films (11) in a stacked manner. This magazine (3) is provided with a positioning device that positions the film (11) according to the size of the film (11). This set magazine (3) is provided with a slide cover that allows the upper front part to be opened and closed freely.

This slide cover cannot be opened or closed unless the locking device is released. When the locking device is released and the slide cover is opened, the film (11) inside can be taken out. When inserting the magazine (3) into the insertion hole (7) and then opening the slide cover, the frame (6) and magazine (3) will be locked, and in this state the magazine (3) can be removed from the frame (6). It is not possible. To take it out, the slide cover must be closed.

By employing such a mechanism, the film (11) in the set magazine is prevented from being accidentally exposed to light.

The receive magazine (4) inserted into the receive magazine insertion hole (8) located below is the same as the set magazine (3).
) is the same as The receive magazine (4) is attached to the frame (6) in an empty state and stores film after shooting.

Film (11) stored in the above set magazine (3)
) are taken out one by one from the top by the sheet feeder (5) and conveyed forward.

As shown in Fig. 4, this sheet feeder (5) is located forward of the front end of the magazine (3) and below the frame (
6) has a crank motor (12) on the side thereof. The crank motor (12) rotates the crank bin (13) in one direction. One end of a connecting rod (14) is pivotally connected to the crank pin (13). An intermediate arm (16) is pivotally connected to the other end of the connecting rod (14) via a pin (15). The middle part of the intermediate arm 16) is attached to a support shaft (17) fixed to the side of the frame 6).
) is pivotally connected to allow vertical movement. This support shaft (17)
is located near the top of the front end of the set magazine (3). An elongated hole (18) extending in the front-rear direction is provided at the rear end of the intermediate arm (16).

A swing arm (19) is attached to the rear end of this intermediate arm (16).
are pivotally connected. A bottle (20) is fixed to the front end of the swing arm (19), and this bottle (20) is rotatably and movably fitted into the elongated hole (18) to connect the front joint. (21). One end of a spring (22) is locked to the tip of a pin 20) that protrudes from the elongated hole (18), and the other end of this spring 22) is connected to a lock pin protruding from the intermediate arm (16). It is locked to <23). This spring (22) urges the bottle (20) to press against the rear end of the elongated hole (18).

An elongated portion (24) extending in the front-rear direction is formed at the rear end of the swing arm (19). This elongated hole (24) is rotatably and movably fitted into a bin (25) fixed to the side surface of the frame (6).

A rear joint portion (26) is formed by fitting the elongate portion (24) with the bottle (25). The position of the bin (25) is located behind the front end of the set magazine (3),
Moreover, it is located at a height approximately equal to the height of the top surface of the film (11). The rear joint part (26) is the front joint part (21).
It is located below.

A pair of the intermediate arms (16) and the swing arms (19) are provided on both left and right sides of the frame 6) facing each other. The front ends of the pair of left and right swing arms (19) are connected by a connecting arm (27). Four sheet suction means <28> are provided on this connecting arm (27) along the left-right direction.

FIG. 1 shows details of the suction cup device of the present invention.

The connecting arm (27) has four suction cup shaft insertion holes (29), and a cylindrical suction cup shaft (30) is slidably inserted into the hole (29). The upper end of the suction cup shaft (3o) has an insertion hole (2
9), and a shaft mounting plate (31) is attached to this protrusion.
By contacting the upper surface of the connecting arm (27), the suction cup shaft (30) is prevented from falling downward. A retaining ring (33) is fixed to the lower part of the suction cup shaft (30), and a compression coil spring (34) is interposed between the upper surface of this retaining ring (33) and the lower surface of the connecting arm 27. There is. This spring (34) causes the suction cup shaft (30) to
is biased downward. If the suction cup shaft (3o) is pushed upward against this spring (34), the spring (
34) contracts, and the suction cup shaft (30) moves relative to the insertion hole (29).

A suction cup (35) is fixed to the lower end of the suction cup shaft (30). This suction cup (35) has a parabolic recess (36) and has a suction cup (35). A valve chamber (37) is formed between the back surface of (35) and the end face of the suction cup shaft (30).

A through hole (38) that communicates the recess (36) and the valve chamber (37)
is provided on the back of the suction cup (35).

The suction ff1 (35) is molded from rubber or soft synthetic resin.

An inner hole (39) that communicates with the valve chamber (37) is provided at the axial center of the sucker shaft (30), and a valve shaft 40 is provided in the inner hole (39).
) is slidably inserted. A valve member (41) is fixed to the lower end of the valve shaft (40), and when the valve member (41) comes into contact with the end surface of the sucker shaft ('30), the valve chamber (37)
) and the inner hole (39) is closed. A compression spring (42) is interposed in the inner hole (39) and urges the valve shaft (40) upward. The urging force of the spring (42) causes the valve member (41) to close the inner hole (39). The upper end of the valve stem (40) projects upward from the inner hole (39). The upper end surface of the valve stem (40) is pushed downward by the valve lever (44).

The valve lever (44) is rotatably provided on a shaft (45) installed horizontally between a pair of left and right swing arms (19). This shaft (45) is located behind the axis of the suction cup shaft (30) and at a height near the upper end surface of the valve shaft (40). The valve lever (44) passes above the valve shaft (40) and is bent downward in front of the suction shaft (30). The lower surface of the valve lever (44) has a valve shaft (40
) is in contact with the upper end surface of the set screw (47).
) is fixed. Adjustment screws (
48) is provided on the valve lever (44).

Next, to explain the operation of the sheet feeder (5) according to FIG. 4, when the crank bin (13) is rotated in the direction of arrow a by the crank motor (12), the crank bin (13) is rotated by the connecting rod (14). The front end of the intermediate arm (16) swings in the direction indicated by the arrow in the figure. This intermediate arm (
16), the swing arm (19) swings in the direction of arrow C in the figure.

The trajectory of arrow C will be explained in more detail with reference to FIG.

Due to the swing a (b) of the intermediate arm (16), the swing arm <
The front end of the support shaft (17) is positioned above the support shaft (17).
) with radius r1 as the center. At this time,
The bin (20) of the front coupling part (21) has a spring (2
2) is pressed against the rear end of the elongated hole (18).

The rear end of the swinging arm (19) moves in the direction of arrow d in the figure by means of an elongated hole (24) fitted into the bin (25). When the rear end of the swing arm (19) moves a predetermined amount, it becomes elongated (24
) and the bin (25) collide, and the rear end of the swing arm (19) can no longer move rearward. but,
Even in this state, the front joint part (21) of the swing arm (19) tries to swing downward, so the bottle (20) of the front joint part (21) resists the spring (22>). As a result, the front end of the swing arm (19) moves in its lower position.
Radius r centered on the bin (25) of the rear joint (26)
It will rotate in two circular arcs.

Therefore, the suction cup (35) IL of the suction means (28) provided on the swing arm (19) via the connecting arm (27)
It will move as shown in trajectory (C). At the lowest end of the trajectory (e), the suction cup (35) moves the film (
11). By this contact, suction 1i
The air in the recess (36) of (35) is discharged, and the suction cup (3)
5) adsorbs the film (11).

As the crank bin (13) rotates in the same direction behind it, the front end of the swing arm (19) moves along the trajectory (c).
It moves in the opposite direction along the same path as before and returns to its original state. Therefore, the suction 11 (
35H, t, While the front end of the film (11) is being sucked, the front edge of the film (11) is moved rearward and upward around the bottle (25). In this way, the suction cup (35
) is the film (11) from the front edge side of the film (11).
), the uppermost film (11) and the film below it are gradually peeled off from the front edge toward the rear, and the uppermost film (11)
Negative pressure is no longer generated between the film and the film below it. Therefore, the mistake of taking out two sheets at the same time is prevented.

Furthermore, the suction 1i (35) moves the support shaft (1
Move forward centering on 7).

When the film (11>) moves to the forefront of the trajectory (C), the front edge of the film (11>) is bitten between a pair of upper and lower biting rollers (49), as shown in FIG.

At this time, as shown in FIG. 2, the valve lever (44) of the suction means (28) comes into contact with the stopper member (50). As a result, the valve lever (44) rotates around the shaft (45), and the tongue member (46) pushes the valve shaft (40). Due to this pushing movement, the valve stem (40) moves downward against the spring (42), and the valve member (46) is released from contact with the lower end surface of the valve stem (40), and the valve chamber (37) is moved downward. It communicates with Mukai (39). Therefore, the valve chamber (37) communicates with the outside air via the vent hole (51) consisting of the inner hole (39) and the intake hole (43), so the recess (36) of the suction cup (35)
Air is supplied to the suction cup (35), and the suction cup (35) releases the suction of the film (11).

The film released from the suction cup (35) is then sent forward by the feed roller (49). The film (11) is guided by the guide member (52) and further sent forward by the first feed roller (53). The film 11) is sent upward while being reversed by a reversing guide member (54), and is further sent rearward by a second feed roller 55). In this state, the film (11) is turned upside down. The film (11) is located at the photographing position 56).

At the shooting position, the film (11) is moved by the blower (5).
At step 7), it is attracted to the photographing position 56).

When taking out the film (11), the magazine (3
) are not taken out at the same time, but
Since there is a possibility that two sheets may be taken out due to an accident, a safety device is provided to prevent this.

It is a scraping roller (58) that touches the front edge of the first film that lifts the film (11) from the magazine (3) by means of the suction means (28) and scrapes the second film downward.

This roller (58) has a projection on its outer periphery.

Furthermore, the pond safety device is a double feed detection sensor (59
). A misfeed sensor (60) is also provided to detect when no sheet is fed out.

Next, when photographing is completed, a return lever (62) operated by a rotary solenoid (61) moves in the direction of arrow e and pushes back the film (11) at the photographing position W (56). In this return cycle, the first and second feed rollers 53) (55) rotate in reverse. Therefore, the film (11) caught by the second feed roller (55) is sent in the opposite direction along the reversing guide member (54) and reaches the first feed roller (53). Thereafter, the film (11) is guided by the return guide member (63), reaches the third feed roller (64), and reaches the third feed roller (64).
4), it is stored in the receive magazine (4).

With this, one cycle is completed.

The above-mentioned biting roller (49), scraping roller (58), and third feed roller (64) are always driven to rotate in one direction by a chino (66) that is rotated by one motor (65).

The first feed roller (53) and the second feed roller (55) are driven by a forward/reverse motor (67) via a chino (68). The forward/reverse switching of the forward/reverse motor (67) and the operation of the rotary solenoid (61) are performed by the crank bin (13) operating the limit switch (69).

Note that the present invention is not limited to the above embodiments.

(Effects of the Invention) According to the present invention, since a vacuum is not used as the suction means, the apparatus becomes simple. Also, since no vacuum is used, the suction of the suction cup is uniform, and feed errors do not occur.

[Brief Description of the Drawings] Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a front view of an X-ray tomography machine, Fig. 3 is a sectional view of a film auto orderer, and Fig. 4 is a sectional view showing an embodiment of the present invention. Sheet feeder drive! It is a diagram showing a l1m structure. (28)... Sheet suction means, (30)... Suction cup shaft, (35)... Suction cup, (36)... Concavity, (4
0)... Valve stem, 50)... Stopper member,
(51)...Vent hole. Patent applicant: Fujimoto Photo Industry Co., Ltd.

Claims (1)

[Claims] (1) It has a suction cup shaft and a suction cup having a parabolic recess fixed to the tip of the suction cup shaft, and the suction cup shaft is provided with a ventilation hole that communicates the recess with the outside, and the suction cup shaft is provided with a ventilation hole that communicates the recess with the outside. A valve stem that can freely open and close the air hole is inserted, and when the sheet attracted by the suction cup is lifted and moved to a predetermined position, a stopper member provided on the fixed side comes into contact with the valve stem and pushes the valve stem.
A suction cup device characterized in that it is configured to open a ventilation hole and supply outside air to a suction cup recess to release the sheet from suction.