JP7417979B2 - feeding device - Google Patents

Description

The present invention relates to a feeding device capable of feeding hoop material.

Patent Document 1 describes a feeding device (processing device) capable of feeding a hoop material, which includes a processing section that performs processing operations in a predetermined cycle, and a processing section located upstream of this processing section. In the processing device, the processing device has a guide table that supports the hoop material fed into the processing section by a guide table, and an intermittent feed section located downstream of the processing section that intermittently feeds the hoop material that has passed through the processing section. The surface on which the hoop material slides is provided with suction holes that suck the hoop material under negative pressure.

As a result, when the hoop material is fed intermittently at high speed, the hoop material is less likely to wave due to the inertial force when stopped, and when machining operations are performed at a high speed cycle, the processing position may become misaligned with respect to the hoop material. It was believed that it would become difficult.

Japanese Patent Application Publication No. 9-99330

However, in the above-mentioned feeding device, the intermittent feeding section is composed of a pair of upper and lower NC roll feeders, and if the work is completed in one stroke, the feeding error will not be a problem and it can be applied, but it can be applied several times. When applied to progressive machining in which the product is completed after several strokes, feed errors must be taken into account.

To explain in detail, when applied to progressive processing, the surface of the hoop material is sandwiched between the upper and lower rollers and fed, so the hoop material is in line contact and receives a concentrated load, and the frictional force between the roller and the hoop material is reduced. In order to obtain this, it is necessary to apply a load to the upper roller, and it is also necessary to move the upper roll up and down for pilot release, which applies an impact load when descending, resulting in damage such as roll marks on the surface of the hoop material. will be given.

Furthermore, since the entire hoop material in the mold and press is moved only by the portions sandwiched between the upper and lower rollers, the hoop material flaps during acceleration and deceleration. Further, when the hoop material is passed through the feeding device, the tip of the hoop material is pushed into a narrow gap between the upper and lower rollers, resulting in poor workability in threading the material.

In view of the above, the present invention provides a feeding device that does not damage the surface of the hoop material, suppresses the occurrence of fluttering of the hoop material, obtains good feeding accuracy, and improves the workability of threading the material. The purpose is to

The invention according to claim 1 includes: a feed roller member having a plurality of rollers that come into contact with one surface in the thickness direction of the hoop material; and a first drive means for driving the rollers;
The feed roller members are arranged with a gap between them, and the roller is arranged in a negative pressure forming area connected to a negative pressure means,
When the hoop material is transported, the hoop material can be sucked toward the roller by bringing the negative pressure forming region into a negative pressure state ,
Used in presses that have a pilot release function .

According to this, by arranging the roller in the negative pressure forming area, the hoop material can be suctioned, so that the occurrence of flapping can be suppressed. In addition, since the hoop material comes into contact with multiple rollers on one surface in the thickness direction, the contact area between the roller and the hoop material can be widened and the suction force can be weakened, so concentrated loads can be avoided and You can get the frictional force. Furthermore, in threading the material, it is only necessary to bring the hoop material into contact with the rollers, and there is no need to pass the hoop material between the rollers.

Therefore, the surface of the hoop material is not damaged, the occurrence of fluttering of the hoop material is suppressed, good feeding accuracy is obtained, and the workability of threading the material can be improved.

Further, a plurality of the rollers are arranged along the feeding direction of the hoop material, and a plurality of the rollers are arranged along the direction perpendicular to the feeding direction of the hoop material.

This contributes to obtaining frictional force while avoiding concentrated loads.

Further, a switching means capable of switching the negative pressure forming region to a negative pressure state and switching the negative pressure forming region in the negative pressure state to an atmospheric pressure state,
The switching means is
comprising a cylinder tube, a hollow piston having a positive pressure area connected to a positive pressure means and put into a positive pressure state, and a second driving means for driving the piston,
The movement of the piston within the cylinder tube closes and opens the positive pressure area and the negative pressure forming area, thereby switching the state of the negative pressure forming area.

According to this, by closing and opening the positive pressure area and the negative pressure forming area, the time required to instantly return from a negative pressure state to an atmospheric pressure state can be shortened, so that the ability of the feeding device to follow the press machine is improved. Get better.

Further, the piston is movable between a standby position and an advanced position,
in the standby position, closing the positive pressure region and the negative pressure forming region to bring the negative pressure forming region into a negative pressure state;
At the advanced position, the positive pressure region and the negative pressure forming region are opened, and the negative pressure forming region, which is in a negative pressure state, is brought into an atmospheric pressure state.

According to this, by moving the piston between the standby position and the advanced position using a simple link mechanism or the like, it is possible to switch the state of the negative pressure forming region.

Further, the positive pressure region can be filled with an amount of air that can return the inside of the negative pressure forming region to atmospheric pressure.

According to this, when the positive pressure area and the negative pressure forming area are opened, the pressure inside the negative pressure forming area will not exceed atmospheric pressure, thereby eliminating the factor that impairs feeding accuracy due to the hoop material being lifted. be able to.

(a) is a plan view of a feeding device according to an embodiment of the present invention, (b) is a view taken along the Ib line in FIG. 1(a), and (c) is a view taken along the Ic line in FIG. 1(a). be. (a) of the same embodiment is a sectional view taken along the line IIa-IIa in FIG. 1(a), and (b) is an explanatory view of the material guide. It is a sectional view taken along the line III-III in FIG. 1(a) of the same embodiment. It is a figure which shows the relationship between a material and a feed stroke. It is an explanatory view when closing and opening a positive pressure area and a negative pressure forming area.

Next, one embodiment of the feeding device of the present invention will be described based on the drawings. In the following explanation, F is the front, B is the back, R is the right, L is the left, U is the top, and D is the bottom of the arrows in each drawing.

As shown in FIGS. 1 to 3, the feeding device 10 schematically includes a plurality of rollers 40a that come into contact with one surface (lower surface) in the thickness direction of the hoop material W, and the rollers 40a are spaced apart from each other. The negative pressure forming area 11 is placed in a negative pressure forming area 11 connected to a negative pressure means, and the negative pressure forming area 11 is brought into a negative pressure state, and the negative pressure forming area 11 in a negative pressure state is brought into an atmospheric pressure state. It is provided with a switching means 80 capable of switching between the state and the state.

Thereby, the hoop material W can be fed along the feeding direction (back and forth direction) by the roller 40a that contacts only the lower surface of the hoop material W in the thickness direction while being sucked.

The feeding device 10 has a housing 20 that includes a bottom plate member 21 and an upper member 25.

The bottom plate member 21 is made of metal and, as shown in FIGS. 1 to 3, is formed into a rectangular flat plate shape, and is provided with a passage hole 22 formed as a stepped through hole extending from the upper surface to the lower surface.

The passage hole 22 has a small inner diameter portion 22a and a large inner diameter portion 22b formed to have a larger diameter than the small inner diameter portion 22a.

The passage hole 22 allows a connecting bracket 120 and a connecting plate 122, which constitute a switching means 80 to be described later, to be movable.

Moreover, two attachment holes 23 formed as through holes penetrating from the upper surface to the lower surface are arranged in the bottom plate member 21 along a direction perpendicular to the feeding direction of the hoop material W. The attachment hole 23 allows a positive pressure air supply shaft 130, which will be described later, to be attached thereto.

The upper member 25 is made of metal, and as shown in FIGS. 1 to 3, the shape in plan view is substantially the same as the bottom plate member 21, and the thickness in the vertical direction is thicker than the bottom plate member 21. The upper member 25 is provided with a negative pressure region forming hole 26 formed as a stepped through hole extending from the lower surface to the upper surface.

The negative pressure region forming hole 26 has a small inner diameter portion 26a and a large inner diameter portion 26b formed to have a larger diameter than the small inner diameter portion 26a.

The small inner diameter portion 26a has approximately the same inner diameter as the large inner diameter portion 22b of the passage hole 22 of the bottom plate member 21.

An upper member 25 is placed and fixed on the upper surface of the bottom plate member 21 to form the housing 20.

A pair of roller attachment members 30 are attached to the upper surface of the housing 20. The roller attachment member 30 is made of metal and is formed into a square prism shape as shown in FIGS. 1 and 3. The roller mounting member 30 is provided with a shaft hole 31 formed as a stepped through hole extending from the outer surface toward the inner surface in the mounted state. A bearing 32 is disposed within the shaft hole 31.

The feed roller member 40 is disposed so as to span between the pair of roller mounting members 30. The feed roller member 40 includes a cylindrical roller 40a, a large diameter shaft portion 40b disposed near the roller 40a, and a small diameter shaft portion 40c disposed at both ends of the feed roller member 40 in the axial direction. ing.

In this embodiment, the first feed roller member 40-1 includes four rollers 40a arranged in the axial direction, and the second feed roller member 40-2 includes three rollers 40a arranged in the axial direction. Ru. The first feed roller member 40-1 and the second feed roller member 40-2 are arranged alternately and with a gap S between them.

In other words, a plurality of rollers 40a are arranged along the feeding direction of the hoop material W, and a plurality of rollers 40a are arranged along the direction orthogonal to the feeding direction of the hoop material W.

By fitting the small diameter shaft portion 40c into the bearing 32, the feed roller member 40 can rotate relative to the roller mounting member 30.

The feed roller member 40 is driven by a servo motor 50 as a first driving means, as shown in FIGS. 1 and 2. An extension shaft 53 is connected to a drive shaft 51 of the servo motor 50 via a coupling 52 . A drive pulley 54 is attached to an end of the extension shaft 53 in a direction (left-right direction) perpendicular to the feeding direction of the hoop material W. A driven pulley 55 is attached to the small diameter shaft portion 40c of the feed roller member 40. In this embodiment, the driven pulley 55 is attached to the left side of the first feed roller member 40-1, and the driven pulley 55 is attached to the right side of the second feed roller member 40-2.

End pulleys 56 are disposed at both ends of the hoop material W in the feeding direction via shaft members (not shown) or the like.

A tension roller 57 is arranged between the driving pulley 54 and the driven pulley 55, between the driven pulley 55, and between the driven pulley 55 and the end pulley 56.

A timing belt 58 is stretched around the drive pulley 54, driven pulley 55, and end pulley 56, and the driving force of the servo motor 50 is transmitted to the pair of first feed roller member 40-1 and second feed roller member 40-2. Ru.

A material guide 60 is attached to the upper part of the roller attachment member 30. The material guide 60 is made of metal and, as shown in FIGS. 1 to 3, includes a vertical guide portion 61 that comes into contact with the hoop material W and restricts movement of the hoop material W in a direction perpendicular to the feeding direction, and a vertical guide portion. 61 and a horizontal portion 62 extending horizontally from the upper end thereof, and is formed in a substantially L-shape.

In this embodiment, the vertical guide portion 61 has a lower end portion having an uneven shape corresponding to the feed roller member 40, as shown in FIG. 2(b).

As shown in FIG. 1, seal plates 70 are attached to the surfaces of both ends of the housing 20 in the feeding direction of the hoop material W. The upper end surface of the seal plate 70 is set to be at the same height as the top of the roller 40a. The surface of the seal plate 70 facing the feed roller member 40 has an uneven shape corresponding to the shape of the feed roller member 40 and is formed to be sealable, thereby maintaining a negative pressure state in the negative pressure forming area 11, which will be described later. It is considered possible.

The switching means 80 includes a servo motor 90, a cylinder tube 100, and a piston 110.

As shown in FIGS. 1 and 2, the servo motor 90 has a drive shaft 91 disposed along the feeding direction of the hoop material W, and the drive shaft 91 is connected to a drive shaft 93 via a coupling 92. There is. The drive shaft 93 is attached to the lower surface of the bottom plate member 21 and is held by a bearing 94 provided with a bearing (not shown).

A cylinder tube 100 is disposed within the housing 20. The cylinder tube 100 is made of metal and has a cylindrical shape as shown in FIGS. 1 to 3 and 5. Above the center of the cylinder tube 100 in the vertical direction, a plurality of ventilation holes 101 are arranged at equal intervals, passing through from the inner surface to the outer surface.

The cylinder tube 100 has an upper end fitted into the small inner diameter part 26a of the upper member 25 and a lower end fitted into the large inner diameter part 22b of the bottom plate member 21.

A region surrounded by the bottom plate member 21, the upper member 25, and the cylinder tube 100 is defined as the negative pressure air chamber 12.

A piston 110 made of metal and having a cylindrical outer shape is disposed within the cylinder tube 100. The piston 110 is formed by combining two members into a hollow shape with a space inside. The inside of the piston 110 becomes a positive pressure region 111.

Two positive pressure opening holes 112 are formed in the upper wall of the piston 110, penetrating from the inner surface to the outer surface. The lower wall of the piston 110 is formed with an insertion hole 113 that communicates with the attachment hole 23 of the bottom plate member 21 and into which a positive pressure air supply shaft 130 (described later) can be inserted.

A connecting bracket 120 is attached to the lower surface of the lower wall of the piston 110.

A connecting arm 121 is attached to the drive shaft 93. The connecting plate 122 is rotatably attached to the connecting bracket 120 and the connecting arm 121.

The rotation of the drive shaft 93 causes the connecting arm 121 to rotate, which is converted into vertical movement via the connecting plate 122 and the connecting bracket 120, so that the piston 110 moves up and down.

A positive pressure air supply shaft 130 is fitted into the attachment hole 23 of the bottom plate member 21 and fixed. The positive pressure air supply shaft 130 is inserted through the insertion hole 113. A positive pressure ventilation passage 131 is formed from the lower end surface of the positive pressure air supply shaft 130 to a partial outer peripheral surface above the center in the vertical direction. The positive pressure ventilation passage 131 is connected to an air compressor (not shown) as a positive pressure means, and is opened and closed by the vertical movement of the piston 110 to fill the positive pressure region 111 with atmospheric pressure and positive pressure air. This makes it possible to create a positive pressure state.

The positive pressure air supply shaft 130 is formed to have a smaller diameter than the positive pressure open hole 112, and a valve member 132 is movable along the axial direction of the positive pressure air supply shaft 130 at the upper end of the positive pressure air supply shaft 130. It is arranged. The valve member 132 is urged upward by a coil spring 133 that contacts the lower surface of the valve member 132 and the upper surface of the lower wall of the piston 110.

An area surrounded by the inside of the cylinder tube 100, the piston 110, the upper member 25, the roller mounting member 30, the material guide 60, the seal plate 70, and the hoop material W placed on the roller 40a is under negative pressure. This is referred to as a formation region 11.

The negative pressure air chamber 12 is configured to communicate with a negative pressure air supply passage 13 connected to a suction device (not shown) serving as a negative pressure means, and is brought into a negative pressure state by operating the suction device (not shown). There is.

In this embodiment, the feeding device 10 is configured to include two feeding units each including a housing 20, a roller mounting member 30, a feeding roller member 40, a material guide 60, a seal plate 70, a switching means 80, etc. There is.

FIG. 4 shows the relationship between material and feed stroke at 500 SPM and 120 msec/rev.

In the press machine, material release (denoted as PILOT RELEASE in FIG. 4) starts at a position before the midpoint of the descending process from the top dead center position to the bottom dead center position. During the 20 msec shown in FIG. 4, the servo motor 90 starts driving and raises the piston 110, and in the "atmospheric pressure switching" state in FIG. 4, the leftmost state in FIG. 5 is reached, and the valve The member 132 opens the positive pressure opening hole 112, and the positive pressure air in the positive pressure area 111 of the piston 110 enters the negative pressure forming area 11, and instantly returns the inside of the negative pressure forming area 11 to atmospheric pressure.

In other words, in the advanced position, the piston 110 opens the positive pressure region 111 and the negative pressure forming region 11 to bring the negative pressure forming region 11, which has been in a negative pressure state, into an atmospheric pressure state.

In the press machine, the end of material release (denoted as PILOT CLAMP in FIG. 4) starts from the position passing the bottom dead center of the ascending process from the bottom dead center position to the top dead center position. During the 20 msec shown in FIG. 4, the servo motor 90 starts driving and lowers the piston 110, and at the "start of suction" in FIG. closes the positive pressure opening hole 112 to stop the positive pressure air in the positive pressure region 111 of the piston 110 from entering the negative pressure forming region 11, and closes the negative pressure air chamber 12 and the vent hole 101 of the cylinder tube 100. communicates with each other to create a negative pressure state in the negative pressure forming region 11.

In other words, in the standby position, the piston 110 closes the positive pressure region 111 and the negative pressure forming region 11 to bring the negative pressure forming region 11 into a negative pressure state.

At this time, the positive pressure ventilation passage 131 enters the positive pressure region 111 from the state where it is closed by the wall of the piston 110, and air is sent from the positive pressure means, so that the positive pressure region 111 becomes a positive pressure state. .

The driving force of the servo motor 50 rotates the roller 40a of the first feed roller member 40-1 and the roller 40a of the second feed roller member 40-2.

Since the roller 40a of the first feed roller member 40-1 and the roller 40a of the second feed roller member 40-2 are arranged with a gap S, the hoop material W placed on the roller 40a is is attracted to the side.

This provides a frictional force with the roller 40a and suppresses flapping. Further, since the hoop material W contacts the plurality of rollers 40a on one surface (lower surface) in the thickness direction, the contact area between the roller 40a and the hoop material W can be increased to weaken the suction force. , it is possible to obtain frictional force while avoiding concentrated loads.

The feeding device 10 configured as described above includes a feeding roller member 40 having a plurality of rollers 40a that comes into contact with one surface in the thickness direction of the hoop material W, and a servo motor 50 as a first driving means for driving the roller 40a. Equipped with
The feed roller members 40 are arranged with a gap S between them, and the roller 40a is arranged in the negative pressure forming area 11 connected to the negative pressure means.

According to this, by arranging the roller 40a in the negative pressure forming area 11, the hoop material W can be sucked, so that the occurrence of fluttering can be suppressed. In addition, since the hoop material W contacts the plurality of rollers 40a on one surface in the thickness direction, the contact area between the roller 40a and the hoop material W can be increased and the suction force can be weakened, so that the concentrated load can be reduced. Frictional force can be obtained while avoiding this. Furthermore, in passing the material, it is sufficient to simply bring the hoop material W into contact with the rollers 40a, and there is no need to pass it between the rollers 40a.

Therefore, the surface of the hoop material W is not damaged, the occurrence of fluttering of the hoop material W is suppressed, good feeding accuracy is obtained, and the workability of threading the material can be improved.

Further, a plurality of rollers 40a are arranged along the feeding direction of the hoop material W, and a plurality of rollers 40a are arranged along the direction perpendicular to the feeding direction of the hoop material W.

This contributes to obtaining frictional force while avoiding concentrated loads.

Further, it includes a switching means 80 capable of switching the negative pressure forming region 11 to a negative pressure state and the negative pressure forming region 11 in the negative pressure state to an atmospheric pressure state,
The switching means 80 is
It includes a cylinder tube 100, a hollow piston 110 having a positive pressure region 111 connected to a positive pressure means and brought into a positive pressure state, and a servo motor 90 as a second driving means for driving the piston 110. ,
The movement of the piston 110 within the cylinder tube 100 closes and opens the positive pressure area 111 and the negative pressure forming area 11, thereby switching the state of the negative pressure forming area 11.

According to this, by closing and opening the positive pressure region 111 and the negative pressure forming region 11, it is possible to shorten the switching time from a negative pressure state to an atmospheric pressure state instantly, so that the feeding device can follow the press machine. gets better.

Further, the piston 110 is movable between a standby position and an advanced position,
In the standby position, the positive pressure area 111 and the negative pressure forming area 11 are closed to bring the negative pressure forming area 11 into a negative pressure state,
At the advanced position, the positive pressure area 111 and the negative pressure forming area 11 are opened, and the negative pressure forming area 11, which is in the negative pressure state, is brought into the atmospheric pressure state.

According to this, by moving the piston 110 between the standby position and the advanced position using a simple link mechanism or the like, it is possible to switch the state of the negative pressure forming region 11.

Further, the positive pressure region 111 can be filled with an amount of air that can return the inside of the negative pressure forming region 11 to atmospheric pressure.

According to this, when the positive pressure area 111 and the negative pressure forming area 11 are opened, the pressure inside the negative pressure forming area 11 will not become higher than the atmospheric pressure, so that the feeding accuracy due to the hoop material W being lifted can be reduced. Obstacles can be eliminated.

Note that the present invention is not limited to the above configuration. That is, various design changes are possible without departing from the gist of the present invention.

For example, the configuration is such that the hoop material W is placed on the roller 40a and sucked from below, but if it is possible to obtain frictional force while avoiding concentrated loads, the hoop material W is placed on the roller 40a and sucked from the bottom side. It is also possible to suction from the side.

Further, the number of rollers 40a may be one, or may be five or more in the axial direction of the feed roller member 40. The number of feed roller members 40 can also be changed as appropriate.

Moreover, other mechanisms can be applied to the switching means 80 as long as the positive pressure region 111 and the negative pressure forming region 11 can be closed and opened.

Further, although the feeding device 10 is configured with two feeding units, it can also be configured with one, three or more feeding units.

Further, although the press machine is exemplified under conditions of 500 SPM and 120 msec/rev, other conditions may be set depending on the specifications.

10 Feeding device 11 Negative pressure forming area 40 Feeding roller member 40a Roller 50 Servo motor 80 Switching means 90 Servo motor 100 Cylinder tube 110 Piston 111 Positive pressure area S Gap W Hoop material

Claims (5)

A feed roller member having a plurality of rollers that come into contact with one surface in the thickness direction of the hoop material, and a first driving means for driving the rollers,
The feed roller members are arranged with a gap between them, and the roller is arranged in a negative pressure forming area connected to a negative pressure means,
When the hoop material is transported, the hoop material can be sucked toward the roller by bringing the negative pressure forming region into a negative pressure state ,
A feeding device characterized in that it is used in a press machine having a pilot release function . The feeding device according to claim 1, wherein a plurality of the rollers are arranged along the feeding direction of the hoop material, and a plurality of the rollers are arranged along a direction perpendicular to the feeding direction of the hoop material. comprising a switching means capable of switching the negative pressure forming region to a negative pressure state and switching the negative pressure forming region in the negative pressure state to an atmospheric pressure state;
The switching means is
comprising a cylinder tube, a hollow piston having a positive pressure area connected to a positive pressure means and put into a positive pressure state, and a second driving means for driving the piston,
3. The state of the negative pressure forming area is switched by closing and opening the positive pressure area and the negative pressure forming area by moving the piston within the cylinder tube. Feeding device as described. The piston is movable between a standby position and an advanced position,
in the standby position, closing the positive pressure region and the negative pressure forming region to bring the negative pressure forming region into a negative pressure state;
4. The feeding device according to claim 3, wherein at the advanced position, the positive pressure area and the negative pressure forming area are opened to bring the negative pressure forming area into the atmospheric pressure state. 5. The feeding device according to claim 3, wherein the positive pressure region can be filled with an amount of air capable of returning the inside of the negative pressure forming region to atmospheric pressure.

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