JPS6042149B2 - Paper tube drawer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper tube feeding device that stores a large amount of tapered paper tubes and allows them to be discharged one after another without any delay without bringing adjacent paper tubes into close contact with each other. The purpose is to

There is a paper tube supply device that stores a large amount of paper tubes at one time by stacking tapered paper tubes one after another so that they are covered one after another, and can pull out the stacked paper tubes one by one starting from the lowest one. That is, in FIGS. 1 and 2, when pulling out the lowest paper tube 5 of the tapered paper tubes S stacked one after another in the cylindrical tube 1, the next one adjacent to the lowest paper tube 5 is pulled out. The paper tube 52 is gripped from the outer periphery of the paper tube by the other paper spine gripping members 2 and 3, and the gripping member 3 on the cylindrical body 1 side is fixed in this position, and the gripping member 2 at the tip is held in the direction indicated by the arrow 4 in FIG. There is a device that separates and pulls out paper tubes by rotating them in the direction of arrow 5 in FIG. In such a device, the gripping members 2 and 3 grip a pair of curved chuck pieces that rotate around a single axis by pressing against the outer circumferential surface of the paper tube, so that the entire outer circumference of the paper spine and the inner circumferential surface of the chuck pieces are completely covered. It is necessary to keep them in close contact all around. In particular, paper tubes with large wall thicknesses and small taper angles may fit extremely tightly together, interlocking with each other when stacked, and a considerable amount of gripping force is required to pull out such paper tubes. However, with the chuck piece as described above, if the center of the paper tube and the center of curvature of the chuck piece are misaligned, or if the diameter of the paper tube at the gripping position is uneven between the paper tubes, the chuck piece may hit the paper tube unevenly. This may result in a decrease in gripping force, and it may not be possible to pull out a tightly fitted paper tube. The present invention has been made to solve the above-mentioned disadvantages, and will be described below with reference to the drawings.

In FIGS. 3 and 4, a fixed cylindrical body 8 is fixed to a substrate 7 supported by a frame 6, and a movable cylindrical body 9 is fitted into the fixed cylindrical body 8 so as to be vertically slidable.

Bolts 11, 11 are screwed onto the flange portion 10 of the fixed cylinder 8, and are screwed onto the bolts 11, 11 through the flange portion 12 of the paper spine gripping device Tl.

Therefore, the paper tube gripping device T1 is fixed in a fixed position. on the other hand,
A separate paper tube gripping device T2 and a paper tube guide 44 are fixed to the flange portion 13 of the movable cylinder body 9 via bolts 14, 14 in the same way as the fixed cylinder body 8, and the flange portion 13 of the movable cylinder body 9 is A shaft 15 extending on the opposite side is fixed, and a roller 16 is pivotally supported at the end of the shaft 15. As shown in FIGS. 5 and 6, a connecting rod 17 is connected obliquely to the sliding direction between the fixed cylinder 8 and the movable cylinder 9, and a spring 18 is connected in the sliding direction.
are connected, and the movable cylinder 9 is urged to cover the fixed cylinder 8.

In FIG. 5, reference numeral 19 denotes a paper tube stopper supported by a shaft 20 on the base plate 7, and the stopper 19 is constructed by inserting a pin 22 fixed to a flange portion 21 of the movable cylinder 9 into an elongated hole 23 of the stopper 19. position.

That is, as the movable cylinder body 9 rotates in the counterclockwise direction A in FIG.
The stopper 19 rotates clockwise around , is positioned above the front surface of the gripping device T2, and allows the paper tube to pass through.

Further, in FIGS. 3 and 5, 24 is a motor attached to the base plate 7, and a shaft 25 of the motor 24 has a cam plate 26 that engages with a roller 16 provided on the flange of the movable cylinder 9, and a base plate. two cam plates 31, which actuate actuators 29, 30 of mechanical valves 27, 28 attached to 7;
32 is fixed.

The cam plates 26, 31, and 32 fixed to the motor shaft 25 rotate only in one direction, that is, in the clockwise direction in FIG.
6 engages the roller 16 on the movable cylinder 9 side,
The movable cylinder 9 rotates the fixed cylinder 8 on the outer circumference in the direction of arrow A.

Furthermore, in FIGS. 4 and 7, the paper tube gripping device T 3 attached to the fixed cylinder 8 and the paper tube gripping device T 2 attached to the movable cylinder 9 have a cross section on the inner periphery of the annular holder ring 33. A substantially U-shaped rubber ring 34 is fitted, and pressure rings 35 and 36 are screwed onto both sides of the annular holder ring 3.
Compressed air is injected from the jet hole 37 between the inner peripheral surface 33a4 and the comb ring 34 to expand the rubber ring 34 and grip the paper tube.

Compressed air is supplied from a compressed air supply source (not shown) to the third
Supplied via mechanical valves 27 and 28 shown in FIG.
be cut off. 38 shown in the fourth figure is a feeler for detecting the presence or absence of a paper tube. When the paper tube S runs out, the feeler 38 turns clockwise around the shaft 39 due to its own weight, and the limit switch 4 is turned.
0 actuator 41 is turned off to detect that there is no paper tube. The operation of the paper tube feeding device as described above will be explained next.

Now, when there is a request command to release a new paper tube, the motor 24 rotates in response to the command, the cam plates 31 and 32 of the motor shaft 25 turn on the actuators 29 and 30, and the mechanical valve 2
7 and 28 are opened, compressed air is supplied to the rubber rings 34 and 34 of the paper tube gripping devices Tl and T2, and due to the expansion of the rubber rings, the paper tube S1 at the bottom of the fourth diagram is moved to the rubber ring of the gripping device T2. 34, the next paper tube S2 is clamped and gripped by the rubber ring 34 of the gripping device T1.

Continued rotation of the motor shaft causes the cam plate 26 to move against the roller 16.
The movable cylinder 9 rotates in the direction of arrow A as shown in FIG. 5 until the side 26a of the cam plate 26 comes into contact with it.
At this time, the movable cylinder 9 is suspended from the fixed cylinder 8 via the connecting rod 17, as shown in the sixth figure, and the connecting rod 17 supports the movable cylinder 9 obliquely. Due to the rotation of the cam plate 26 and the rotation of the flange portion 13, the movable cylinder 9 rotates around the outer periphery of the fixed cylinder 8 against the elastic force of the spring 18, as shown by the two-dot chain line in FIG. It protrudes downward to the position. Therefore, the lowest paper tube S1 held by the gripping device T2 supported by the movable cylinder 9 is rotated and pulled out from the paper tube S2 above it.

On the other hand, as the movable cylindrical body 9 rotates, the pin 22 fixed to the movable cylindrical body engages with the long hole 23 of the stopper 19, and the stopper 1
9 pivots upward around the shaft 20 and disengages from the paper tube S1 at the lowest end. When the engagement between the stopper 19 and the paper tube S1 at the lowest end is released, the cam plates 31 and 32 of the motor shaft 25
cam 3 so that one side releases the actuator 29.
1 is set, and therefore the rubber ring 34 that was gripping the paper tube S1 at the lowest end contracts and returns to its original state, so the grip is unwound and the paper tube S1 falls onto the paper tube holder 42. It is accommodated as shown in .

As shown in FIG. 8, the rubber ring 34 grips the paper tube, and the rubber between the thick wall portions 34b formed at equal intervals on the circumference of the inner peripheral wall portion 34a of the rubber ring 34 and the adjacent thick wall portion 34b is compressed into air. Therefore, it expands rapidly and comes into pressure contact with the outer periphery of the paper tube S as shown by the two-dot chain line, and evenly presses the outer periphery of the paper tube, so the paper tube gripping force is extremely strong, and it is gripped to the extent that it cannot be pulled out by hand. Therefore, even if it is tightly fitted to the upper paper tube, it can be easily pulled out and separated.

Although the rubber ring 34 is a continuous annular rubber ring extending over the entire inner circumference of the annular holder ring 33, it is not necessarily a continuous annular ring, and a plurality of rubber rings are formed at equal intervals on the inner circumference of the annular holder ring. It is also possible to provide a plurality of rubber-like bags and inflate the plurality of rubber-like bags by injecting compressed air. That is, a strong gripping force can be obtained by pressing the rubber rings at equally spaced positions on the outer periphery of the paper tube and gripping them with an even pressing force, without pressing the rubber rings closely against the entire outer periphery of the paper tube. When the engagement between the cam plate 26 and the roller 16 is released by the subsequent rotation of the cam plate 26, the movable cylinder 9
is pulled back along the outer peripheral surface of the fixed cylinder 8 by the spring 18, and at the same time, the movable cylinder 9 is pulled back by the action of the connecting rod 17.
The stopper 19 rotates in the opposite direction to when it is ejected and returns to the solid line position in Figure 6, and the stopper 19 rotates counterclockwise around the shaft 20 shown in Figure 5 and returns to the solid line position to prevent the next paper tube from falling. To prevent.

When the movable cylinder 9 returns to its original position, that is, the stopper 19 also returns to its original position, the engagement between the cam plate 32 and the actuator 30 is released, and the rubber of the paper tube gripping device T1 provided on the fixed cylinder 8 side is released. The supply of compressed air to the ring 34 is stopped, and the rubber ring 3
4 contracts and returns to its original state, and the paper tube S2 held by the rubber ring 34 is released from its grip and falls to the stopper 19 position, preparing for the next paper tube release command.

As described above, according to the present invention, when tapered paper tubes are stacked and stored, the lowest paper tube and the paper tube above it are grasped, and when only the lowest paper tube is pulled out, the paper tube The paper tube can be gripped by supplying compressed air to the rubber ring, and as the rubber ring expands, it presses the rubber ring evenly against the outer periphery of the paper tube, so the rubber ring is applied to almost the entire outer periphery of the paper tube. The rings press against each other and the gripping force is extremely strong, making it possible to reliably pull out paper tubes that are tightly fitted into each other, separating them from the upper paper tube, and taking out only the lowest paper tube.

Furthermore, since rubber expansion by compressed air is used instead of mechanical clamping using levers, the surface of the paper tube is not damaged.

[Brief explanation of drawings]

Figure 1 is a side cross-sectional view showing the storage state of the tapered paper tube;
Figure 2 is a front view showing a conventional example of the method of holding the paper tube;
The figure is a side view of the configuration of the device of the present invention, FIG. 4 is a sectional plan view of the same,
Fig. 5 is a front view of the same, Fig. 6 is an explanatory plan view showing the relationship between the fixed cylinder and the movable cylinder, Fig. 7 is a cross-sectional view of the structure of the paper tube gripping device, and Fig. 8 is a paper tube using a rubber ring. FIG. 3 is an explanatory diagram of a gripping action. 8...Fixed tube body, 9...Movable tube body, S1...Lowest paper tube, S2...Upper paper tube, T1...Fixed side paper tube gripping device, T2... Movable paper tube gripping device, 34...
・Rubber ring.

Claims (1)

[Scope of Claims] 1 Paper tube gripping devices that grip paper tubes by expanding rubber rings due to air pressure are provided on the fixed cylinder side and the movable cylinder side, and the tapered paper tubes stored in stacks are attached to the lowest paper tube and its uppermost paper tube. A paper tube drawing device characterized in that the paper tube is gripped by the paper tube gripping device and the movable cylindrical body is moved to pull out the lowest paper tube. 2. A paper tube gripping device fits a continuous rubber ring with a substantially U-shaped cross section and thick-walled portions formed at equal intervals on the inner peripheral wall of the annular holder ring, and attaches the rubber ring to both sides of the annular holder ring through the rubber ring. 2. The device according to claim 1, characterized in that it is fitted with a pressure ring. 3. The movable cylinder is rotatably and slidably fitted into the fixed cylinder, and between the movable cylinder and the fixed cylinder, a connecting rod is connected obliquely to the sliding direction and a spring is connected in the sliding direction, 2. The device according to claim 1, wherein the movable cylinder is moved so as to slide up and down while rotating.