JPH0629116B2 - Sheet feeding device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material feeding device that moves a plate material by frictionally engaging a tension portion of a belt.

(Prior Art) As an example of the prior art, there is a structure shown in FIG. 5 and FIG.

That is, a pair of upper toothed pulleys 1 and 2 are arranged in the left-right direction on the upper side, and an upper toothed belt 3 is wound around these upper toothed pulleys 1 and 2 with their tooth surfaces facing inward.

Further, lower toothed pulleys 4 and 5 are arranged below the upper toothed pulleys 1 and 2, respectively.
Then, the lower toothed belt 6 is wound with its tooth surface facing inward.

Also, the tensioning parts 3a, 6a on the relative surface side of the toothed belt 3, 6
The movable pressurizing body 7 and the fixed pressurizing body 8 are arranged on the respective tooth surfaces (a) and (a) side of the movable pressurizing body 7 in the direction orthogonal to the extending direction of the upper toothed belt 3. While being movably supported, the spring 9 biases elastically in the direction of the tooth surface (a) to fix the fixed pressure member 8 to the frame.

Then, by rotating the upper toothed pulleys 1 and 2 in the right rotation direction and the lower toothed pulleys 4 and 5 in the left rotation direction, respectively, the plate member 10 is tensioned by the tension portion 3a.
There is a structure in which the rear surface (c) and (d) of 6a are pressed to move to the left in FIG.

(Problems to be Solved by the Invention) In the above-mentioned conventional one, the tooth surfaces (a) and (a) of the toothed belts 3 and 6 are respectively movable movable body 7 and fixed pressurized body 8.
The frictional force increases and the tooth surfaces (a) and (a) are worn more severely because they are pressed against and slide against each other.

Therefore, there is a drawback that the load for moving the plate material increases.

Further, due to the above wear, the thickness of each of the toothed belts 3 and 6, that is, the vertical support position of the plate material changes with time, and when the end surface of the plate material is chamfered and lowered, this chamfering process can be performed with high accuracy for a long time. There was a defect that it could not be maintained.

It is an object of the present invention to obtain a novel plate material feeding device that solves the above drawbacks.

(Means for Solving Problems) The present invention is configured as follows to achieve the above object.

That is, two sets of a pair of pulleys, which are spaced apart in the left-right direction, are provided above and below, and a toothed belt is wound between the pulleys of each set with the tooth surface of the toothed belt facing outward. And a pressurizing body is arranged close to each other on the back side of the tensioned portions facing each other, and one end of the pressured body is connected to a pressure source of compressed air and the other end is open toward the backside of the tensioned portion. Is provided, and the plate member is pressed by the tooth surface portions of each of the toothed belts facing each other and transferred in one direction.

(Operation) Since the present invention is configured as described above, when the pressure body is moved to the back side of the tensioned portion of the toothed belt and compressed air is supplied to the air ejection passage, the pressure body and the back surface are separated from each other. An air film is formed between them, and in this state, the back surface is pressed toward the plate material.

Then, the tooth surface side of the tensioned portion of the toothed belt is frictionally engaged with the plate material by the pressing, and the plate material is fed in the moving direction of the tensioned portion.

(Example) Hereinafter, the Example of this invention is described based on drawing.

First, in the drawings, FIG. 1 is an explanatory side view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part thereof, and FIG.
It is a III-III sectional view of a figure.

In FIG. 1, reference numeral 15 is an upper feed mechanism.

The upper feed mechanism 15 is configured as follows.

That is, the large-diameter toothed pulley 16 and the large-diameter flat pulley 17 are arranged in the left-right direction so as to be separated from each other, and the left-side toothed pulley 1
Small-diameter guide pulleys 18 and 19 are arranged above and below 6, respectively.

A toothed belt 20 is wound around each of the pulleys 16 to 19.

As shown in FIG. 1, the toothed belt 20 is formed by winding the flat pulley 17 on the right side and the respective guide pulleys 18 and 19 around the back surface 20a side of the toothed belt 20 so that the toothed belt 16 on the left side is wound. Winds around the tooth surface 20b side of the toothed belt 20.

As a result, the tension portion 20c in the lower half of the toothed belt 20
The rear surface 20a side is upward (inward) to the tooth surface 20b.
Turn the side down (outside).

Further, the movable pressing body 21 is arranged so as to be vertically movable on the upper surface of the tension portion 20c, that is, on the rear surface 20a side.

The movable pressurizing body 21 is always elastically biased downward by the spring 22.

The lower feed mechanism 25 is arranged below the upper feed mechanism 15 so as to face the upper feed mechanism 15.

The lower feed mechanism 25 is constructed as follows.

That is, the large-diameter toothed pulley 26 and the large-diameter flat pulley 27 are arranged apart from each other in the left-right direction, and the left toothed pulley 2
Small-diameter guide pulleys 28 and 29 are arranged above and below 6, respectively.

A toothed belt 30 is wound around each of the pulleys 26 to 29.

As shown in FIG. 1, the toothed belt 30 is formed by winding the flat pulley 27 on the right side and the respective guide pulleys 28, 29 around the back surface 30a side of the toothed belt 30 and on the left toothed pulley 26. Winds around the tooth surface 30b side of the toothed belt 30.

As a result, the tension portion 30c of the upper half of the toothed belt 30
The rear surface 30a side is downward (inward) to the tooth surface 30b.
Turn so that the side is upward (outward).

Further, the fixed pressurizing body 31 is fixedly arranged on a frame (not shown) on the lower surface of the tension portion 30c, that is, on the rear surface 30a side.

Then, the movable pressing body 21 and the fixed pressing body 31 described above
The air ejection passages 35 and 36 are formed in.

Each of the air ejection passages 35 and 36 has a toothed belt 20.
On the facing side of the movable pressure member 21 and the fixed pressure member 31, which face 30, the elongated ejection holes 35a and 36a extending and opening along the toothed belts 20 and 30 are formed, and these ejection holes 35a and In the drawing of 36a, the supply hole 3 communicating with the right end portion
5b and 36b are formed.

Then, the outer ends of the supply holes 35b and 36b are connected to a pressure source of compressed air such as an air pump.

In the figure, 37 is a hose for supplying compressed air to the supply holes 35b and 36b.

Next, the operation mode of the above embodiment will be described.

First, in a state in which compressed air is supplied to the air ejection paths 35 and 36, the toothed pulley 16 on the left side of the upper feed mechanism 15
The toothed pulley 26 on the left side of the lower feed mechanism 25 is synchronized with a motor (not shown) to rotate in opposite directions, for example, the toothed pulley 16 on the upper side rotates left and the toothed pulley 26 on the lower side rotates right.

Then, the plate member 4 is provided on the right end side of each of the tension portions 20c and 30c.
If 0 is supplied, the plate member 40 will be
The tooth flanks 20b and 30b of c are pinched and transferred to the left.

In this case, the back surface 20a of each of the tension portions 20c and 30c
An air film is formed by the air ejected from the air ejection holes 35a and 36a on the respective opposing surfaces of the movable pressurizing member 21 and the fixed pressurizing member 31 and the rear surface 20a and 30a.
The contact between the movable pressurizing member 21 and the fixed pressurizing member 31 is prevented, and the frictional force generated between the two becomes extremely small.

As shown in FIG. 4, the air ejection paths 35 and 36 according to the present invention form hollow portions 35c and 36c extending in the longitudinal direction in the movable pressurizing member 21 and the fixed pressurizing member 31, respectively. However, a large number of ejection holes 35d opening from this hollow portion toward the respective back surfaces 20a and 30a of the toothed belts 20 and 30.
-36d may be formed and one end of the hollow portion may be connected to a pressure source of compressed air.

(Effects of the Invention) As is apparent from the above description, according to the present invention, the tooth surface side of the toothed belt is brought into pressure contact with the plate member, so that the frictional engagement force between the toothed belt and the plate member is increased, The plate material can be accurately transferred without slipping.

Further, since an air film is formed between the pressurizing body that presses the toothed belt in the plate material direction and the back surface of the toothed belt,
The frictional force generated between the two becomes extremely small, the load for moving the plate can be made extremely small, the abrasion of the toothed belt becomes extremely small, and the plate is not displaced in the vertical direction. There is an effect such that it can be moved with high accuracy over a long period of time.

[Brief description of drawings]

FIG. 1 is a side view for explaining an embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part thereof, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, and FIG. FIG. 5 is an enlarged cross-sectional view of an essential part shown in FIG. 5, FIG. 5 is an explanatory side view showing a conventional example, and FIG. 15: upper feed mechanism, 16: toothed pulley, 17: flat pulley, 18/19: guide pulley, 20: toothed belt, 20a: back surface, 20b: tooth surface, 20c: tensioned portion, 2
1: movable pressure member, 22: spring, 25: lower feed mechanism, 2
6: toothed pulley, 27: flat pulley, 28/29: guide belt, 30: toothed belt, 30a: back surface, 30
b: tooth surface, 30c: tension part, 31: fixed pressure body, 35
36: Air ejection passage, 35a ・ 36a: Ejection hole, 35b ・
36b: supply hole, 37: hose, 40: plate material.

Claims (1)

[Claims] 1. A pair of upper and lower pulleys, which are separated from each other in the left-right direction, are provided, and a toothed belt is wound between each pair of pulleys with the tooth surface of the toothed belt facing outward, and each toothed belt is provided with a toothed belt. Pressurizing bodies are arranged close to each other on the back side of the tensioning parts that are belts and face each other, and one end of the pressing body is connected to a pressure source of compressed air and the other end opens toward the back surface of the tensioning part. An apparatus for feeding a plate material, characterized in that an air jetting path is provided, and the plate material is pressed by the tooth surface portions of each of the toothed belts facing each other and is transferred in one direction.