JP3348148B2 - Sheet feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a sheet feeding apparatus for feeding stacked sheets one by one to the outside.

[0002]

2. Description of the Related Art As a sheet feeding apparatus, a pair of rollers are rotatable only in one direction so that a stacked sheet-like material can be supplied one by one to the outside, and are brought into contact with the sheet-like material. When the roller moves in the supply direction, the roller does not rotate, and the sheet-like material is pushed out by friction and entrained to send out the sheet-like material.When the roller moves in the opposite direction to the supply direction, the roller rotates and the sheet rotates. In some cases, only the rollers return without pushing the object by friction.

[0003]

It is desirable to provide a large number of rollers in order to reliably supply a sheet. However, when a sheet-like material is warped, only one of the rollers contacts only one of the rollers. However, the effect could not be fully exhibited. In view of the above, an object of the present invention is to increase the reliability of supply when a sheet is warped.

[0004]

According to the present invention, there is provided a sheet feeding apparatus for feeding a stacked sheet-like object to the outside one by one, and a support reciprocating in a sheet-feeding direction of the sheet-like object; A seesaw body rotatably supported at an intermediate portion by a body and extending in the sheet supply direction, and attached to both ends of the seesaw body to come into contact with the sheet material and to reciprocate by the support body A pair of contact members that press the sheet-like object with frictional force when moving in the supply direction, and do not press the sheet-like material with frictional force when moving in the opposite direction to the supply direction;
It is comprised including.

Here, the contact member is preferably a roller that can rotate in only one direction.

[0006]

According to the present invention, when the sheet-like material is warped, the seesaw body is appropriately rotated to follow the warp of the sheet-like material, and regardless of the presence or absence of the warp, the contact of the both ends of the seesaw body is obtained. The member is always in contact with the sheet-like material and can be supplied reliably. By using a roller that rotates in one direction and does not rotate in the opposite direction as the contact member, necessary functions can be easily realized.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
A description will be given based on FIG. The sheet feeding apparatus according to the present embodiment is for stacking and storing a large number of sheet-like objects 1 such as cardboard and supplying them one by one to the assembling process and the like sequentially from the lowermost sheet-like object 1.

A gate plate 2 is disposed on the front side (supply direction side) of the storage unit, and a guide roller 3 is disposed below the lower end of the gate plate 2 with a gap therebetween. In the gap between the gate plate 2 and the guide roller 3, only the lowermost sheet 1 can pass. Further, a pair of upper and lower feeding rollers 4 and 5 are disposed in front of the gap between the gate plate 2 and the guide roller 3 in the supply direction.

A table 6 which can reciprocate in the supply direction is provided below the storage section.
Is reciprocated. A support 8 is erected on the table 6, and an intermediate portion of a seesaw body 10 is rotatably supported by a pin 9 at the tip of the support 8. Rollers 13 and 14 as contact members are supported at both ends of the seesaw body 10 via one-way bearings 11 and 12 so as to be rotatable only in one direction (clockwise in the figure). These rollers 11 and 12 support the sheet material 1 from below. In addition, at least the surfaces of the rollers 13 and 14 are made of rubber so that the coefficient of friction with the sheet-like material 1 is large.

On the table 6, a bracket 15 is provided.
The pawl member 16 is fixed via the bracket 17, and a guide roller 18 is disposed behind the bracket 16 via a bracket 17. This claw member 16 is used when the table 6 moves in the supply direction.
The trailing end of the lowermost sheet 1 can be hooked and moved, and at this time, the guide roller 18 enters under the next sheet 1 to be supplied, and the claw member 16 moves the sheet when the sheet 1 retreats after the supply. It can be prevented that the object 1 is caught.

Next, the supply operation will be described. When supplying the sheet material 1, the output rod of the cylinder 7 is retracted, and the table 6 is advanced in the supply direction. This allows
A pair of rollers 13 and 14 move forward, and these rollers 1
Since the members 3 and 14 cannot be rotated in the counterclockwise direction, the sheet-like object 1 is entrained in a state of being frictionally engaged with the sheet-like object 1.

As a result, the leading end of the sheet-like material 1 is caused to enter the gap between the gate plate 2 and the guide roller 3, and is further fed between the pair of upper and lower feeding rollers 4, 5.
The paper is fed by these feeding rollers 4 and 5. Further, at the time of supply by the rollers 13 and 14, the claw member 16 abuts on the rear end of the sheet-like material 1 to assist feeding. At this time, the guide roller 18 has entered the lower side of the sheet 1 to be supplied next.

When the table 6 returns after the supply is completed, the pair of rollers 13 and 14 can rotate clockwise, so that the rollers 13 and 14 rotate in that direction, that is, frictionally engage with the sheet 1. And can return smoothly. Further, since the sheet-like material 1 is lifted by the guide roller 18, the claw member 16 does not get caught.

On the other hand, consider the case where the sheet-like material 1 is warped as shown in FIG.
0 can appropriately rotate around the pin 9 and follow the warpage of the sheet-like material 1. Therefore, regardless of the presence or absence of warpage, both rollers 13 and 14 are always in contact with sheet-like material 1 and can be supplied smoothly. The sheet-like material to be supplied by the sheet supply device according to the present invention may be cardboard, cardboard, thick film, sheet, or the like.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an embodiment of the present invention.

FIG. 2 is a schematic side view showing an operation when a sheet is warped.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet-like material 2 gate plate 3 guide roller 4, 5 feed-out roller 6 table 7 cylinder 8 support 9 pin 10 seesaw body 11, 12 one-way bearing 13, 14 roller (contact member) 15 bracket 16 claw member 17 bracket 18 guide roller

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shoichi Kawase 5-12-8 Ginza, Chuo-ku, Tokyo Oji Paper Co., Ltd. Packaging System Department (72) Inventor Tetsuo Murakami 300 Hiraki, Fuji City, Shizuoka Prefecture (56) References JP-A-6-92478 (JP, A) JP-A-8-58987 (JP, A) JP-A-9-315609 (JP, A) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65H 1/06

Claims (2)

(57) [Claims] 1. A sheet feeding apparatus for feeding stacked sheets one by one to the outside, wherein a support reciprocates in a feeding direction of the sheets, and an intermediate part is rotatable on the support. A seesaw body that is supported on the sheet-like material and extends in the supply direction of the sheet-like material; attached to both ends of the see-saw body to contact the sheet-like material and form a sheet-like material when the support moves in the supply direction by reciprocating motion of the support. And a pair of contact members that apply a frictional force to the object and do not apply a frictional force to the sheet-shaped object when moving in a direction opposite to the supply direction. 2. The sheet feeding apparatus according to claim 1, wherein the contact member is a roller that can rotate in only one direction.