JP6166973B2 - Sheet material feeder - Google Patents

Description

  The present invention relates to a plate material feeding device, and more particularly to a plate material feeding device suitable for intermittently supplying a plate material to a press device.

As a plate material feeding device used for intermittently supplying a plate material to a press device, the one described in Patent Document 1 is a typical one. In the plate material feeding device described in Patent Document 1, the rotational force is transmitted from the main roll to the drive motor through the plate material sandwiched between the rolls, with one roll as the main roll and the other motor as the sub-roll. This is a so-called one-sided roll drive system. The roll axis of the main roll is held by an eccentric flange, and the roll interval can be adjusted according to the thickness of the plate material by the main roll being displaced up and down by the rotation of the eccentric flange. Further, the cam follower held on the sub-roll side is engaged with a rectilinear cam member slidably held on the housing side, and the sub-roll is moved up and down by the displacement of the engaging position due to the rectilinear movement of the rectilinear cam member. Thus, the movement of the release operation of the plate material that is synchronized with the insertion operation of the positioning pin during the press work is created.
The plate material feeding device of Patent Document 1 has a high degree of completion and is widely used in practice.

Thus, when transporting a heavy plate material having a large plate thickness, the holding pressure is increased by narrowing the roll interval. However, when the holding pressure increases, a concave mark is easily formed on the plate material.
Recently, the demand for appearance has become strict, and the existence of these indentations cannot be overlooked.
The indentation is difficult to achieve because the holding pressure can be reduced if a double-sided roll drive system that drives both of the pair of rolls is used. However, as in the plate material feeding device described in Patent Document 1, it corresponds to the plate thickness of the plate material. It is essential to incorporate a mechanism that can handle "roll interval adjustment" and "release operation" that synchronizes with the positioning pin insertion operation. This is not to say that you should communicate to
On the other hand, it is not practical to connect a drive motor for each roll because the apparatus becomes complicated and large, and the cost of the press product is increased.

  The present applicant has previously proposed a double-sided roll drive system in which a pair of rolls are driven by a single gear motor by gear engagement in the plate material feeding device described in Patent Document 2. In this device, a drive motor is coupled to the upper roll, and a rotational force is transmitted to the lower roll through a free coupling to the lower roll so that the roll shaft is continuously moved while maintaining the meshing of the gear. The movement required for the release operation is created by moving up and down, but because the roll shaft is supported via the universal coupling, the flexible coupling tends to bend and the rotation of the lower roll tends to be delayed. It is difficult to ensure the synchronization of the rotation of the upper and lower rolls. Since the synchrony affects the feeding accuracy, it is important to ensure the synchrony especially when feeding to the press machine.

JP 2009-106990 A JP-A-4-313556

  The present invention has been made paying attention to the above-mentioned conventional problems, and is a double-sided drive system using one drive motor as a drive source, and can cope with “roll interval adjustment” and “release operation”. It is an object of the present invention to provide a double-sided roll drive type plate material feeding device that is also excellent in the rotational synchronization of the roll.

As a result of diligent research, the present inventor has conducted “roll interval adjustment” and insertion of positioning pins on the sub-roll side corresponding to the plate thickness while maintaining the meshing of the gear between the main roll and the sub-roll. The present inventors have found that the synchronism of the roll can be maintained while incorporating a mechanism for creating a devised motion that can correspond to the “release operation” that is synchronized with the operation, and thus completed the present invention.
The invention of claim 1 of the present invention has a pair of upper and lower main rolls and sub-rolls, a plate material clamping means for clamping a plate material between the rolls, a roll rotation driving means for rotationally driving the pair of rolls, and the pair In the plate feeding apparatus comprising release means for releasing the holding of the plate material by the rolls and roll interval adjusting means for adjusting the roll interval of the pair of rolls, the roll rotation driving means is a drive coupled to the main roll. A motor, a main roll gear fixed to the main roll, a sub-roll gear fixed to the sub-roll, and a gear-engaged drive transmission unit including a plurality of transmission gears interposed between the two gears; The release means includes a holding member that rotatably holds the sub-roll gear, and the holding member while maintaining meshing of the gear. Is composed of a holding member moving means for moving, during release operation, said the swinging of the holding member apart the sub-roll are relative to the main roll, the plate clamping unit and the retaining member rocking means includes a piston A cam mechanism composed of an air piston extending in the advancing and retreating direction, a cam follower provided in one extension portion of the piston and a lift cam member engaged with the cam follower, and fixed to the holding member side, It is composed of an extension part that contacts the other end side of the piston by a rotating pair, and the holding member swings in the clamp / release direction integrally with the action part by the vertical movement of the piston. It is a plate material feeding device.

According to a second aspect of the present invention, in the plate material feeding device according to the first aspect of the present invention, the plate member feeding device further includes an urging unit that elastically urges the operating portion in a release direction at a position facing the rotation pair side with the piston. This is a sheet material feeding device.

According to a third aspect of the present invention, in the plate material feeding device according to the first or second aspect , the vertical movement distance when the piston is clamped and released coincides with the vertical movement distance of the cam follower engaged with the cam groove of the lift cam member. It is the board | plate material feeder characterized by the above-mentioned.

According to a fourth aspect of the present invention, in the plate material feeding device according to any one of the first to third aspects, the roll interval adjusting means includes a cam groove formed in a lift cam member and extending in a lateral direction while being inclined, and the cam It is a board | plate material feeder characterized by comprising with the displacement means of a groove | channel.

According to a fifth aspect of the present invention, in the plate material feeding device according to the fourth aspect , the displacement means includes a housing that accommodates the lift cam member so as to be movable in the lateral direction, and a female screw formed so as to penetrate the side portion of the housing. A connecting shaft that is connected to the lift cam member and has an external thread formed on the outer surface, and a handle that is attached to the connecting shaft and extends from the housing. The plate material feeding device is characterized in that the cam groove with which the cam follower is engaged is displaced by a reciprocating screw operation.

According to a sixth aspect of the present invention, in the plate material feeding device according to any one of the first to fifth aspects, the holding member holds an even number of transmission gears together with the sub-roll gear so as to be rotatable with a fixed relative positional relationship. The plate material feeding device is characterized in that the oscillation center is coaxial with the rotation center of the transmission gear meshing with the main roll gear.
A seventh aspect of the present invention is the plate material feeding device according to any one of the first to sixth aspects, wherein the roll rotation driving means intermittently drives the pair of rolls, and the plate material is intermittently connected to the press device. It is a board | plate material feeder characterized by supplying regularly.

  According to the plate material feeding device of the present invention, it is possible to cope with “roll interval adjustment” and “release operation” by a double-sided drive system using one drive motor as a drive source, and also for rotational synchronization of a pair of rolls. Are better.

It is a perspective view of the board | plate material feeder which concerns on embodiment of this invention. It is a partially broken perspective view of the board | plate material feeder of FIG. It is a partially broken perspective view of the board | plate material feeder of FIG. It is a schematic side view of the board | plate material feeder of FIG. FIG. 2 is a schematic cross-sectional view of a pair of roll sides of the plate material feeding device of FIG. 1. It is a perspective view of the piston-cam follower of the board | plate material feeder of FIG. It is a perspective view of the piston-cam mechanism of FIG. It is a schematic sectional drawing of the board | plate material feeder of FIG. It is explanatory drawing by the side of the piston of release operation | movement of the board | plate material feeder of FIG. 1, and clamping operation | movement. It is explanatory drawing by the side of the gear of FIG. It is explanatory drawing of roll space | interval adjustment of the board | plate material feeder of FIG. It is explanatory drawing of the piston raising / lowering system of the board | plate material feeder of FIG. It is explanatory drawing of operation | movement cooperation with the board | plate material feeder of FIG. 1, and a press apparatus.

A plate material feeding apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1, 2, and 3, a pair of rolls 3 and 9 are opposed to each other as a plate material clamping unit of the plate material feeding device 1, and a plate material is sandwiched between the respective roll portions 5 and 11. The plate material is fed by the rotation of the roll shafts 7 and 13, and the lower roll 3 is set as the main roll and the upper roll 9 is set as the sub-roll.

Reference numeral 15 denotes a base-side housing, and a pair of bearings 17 and 17 are provided to face each other on a pair of raised side portions of the base-side housing 15. One end side of the roll shaft 7 of the main roll 3 is rotatably supported by the one bearing 17, and a main roll gear 19 is fixed to a distal end portion extending outward. The other end of the roll shaft 7 is coaxially connected to a motor shaft 23 (see FIG. 4) of a servo drive motor 21. The motor shaft 23 is rotatably supported by the other bearing 17, and the main body of the drive motor 21 is fixed to the outer surface of the base side housing 15. With this configuration, the main roll 3 is rotatably supported by the base-side housing 15 so that the rotational force from the drive motor 21 is transmitted.
A pair of material guides 16 extend inward from both side portions of the base-side housing 15. This material guide 16 carries both edge portions of the plate material (S) sandwiched between the roll portion 5 of the main roll 3 and the roll portion 11 of the sub-roll 9 to guide the feeding of the plate material (S). .

Reference numeral 25 denotes a holding member. In this holding member 25, when viewed from the front, it is in a state of opening downward in a “U” shape, and roll support portions 29, 29 extend downward from the left and right edges of the connecting portion 27, respectively. As shown in FIG. 5, the arm portion 31 further inclines and extends downward from each roll support portion 29. The edge 33 of the right arm 31 is curved in a concave shape so as not to interfere with the main roll 3 and is separated by a certain distance.
As shown in FIG. 4, a pair of bearings 35, 35 are provided facing the roll support portions 29, 29, and both end sides of the roll shaft 13 of the sub-roll 9 are rotatably supported by the bearings 35, 35, respectively. Has been. A sub-roll gear 37 is fixed to the front end portion extending outward on the main roll gear 19 side.

As shown in FIG. 5, an intermediate gear 39 and an idler gear 41 are rotatably held on the right arm portion 31 as transmission gears. Meshing.
Since the gear train composed of the sub-roll gear 37, the intermediate gear 39, and the idler gear 41 is held so as not to be able to move on the plane with respect to the holding member 25, the above-described meshing is always maintained.

The holding member 25 swings as will be described later, but the swing center and the rotation center 40 of the intermediate gear 39 are on the same axis, and the meshing between the intermediate gear 39 and the main roll gear 19 is always maintained. Due to this meshing, the rotational force from the drive motor 21 is transmitted to the sub-roll 9 regardless of the swing.
FIG. 4 shows the positional relationship during the feeding operation of the plate material (S), and the respective rotation centers of the roll part 11 of the sub-roll 9 and the roll part 5 of the main roll 3 are on one vertical.

  As shown in FIG. 2, a support shaft 43 extends horizontally through the arm portions 31, 31 of the holding member 25, and both end portions (not shown) of the support shaft 43 are rotatable on the base side housing 15. It is supported. The holding member 25 is swung by the rotation of the support shaft 43. That is, the axis of the support shaft 43 is the center of swinging of the holding member 25. The swing center of the support shaft 43 is coaxial with the rotation center of the intermediate gear 39. The support shaft 43 is cut on the upper side from the center of rotation and the outer surface thereof is a flat surface 45, but the axis is the center when the support shaft 43 is not cut and is assumed to have a circular cross section.

On the base-side housing 15, swinging means for the holding member 25 is integrally provided.
2 and 3, reference numeral 47 denotes a cam storage chamber, and the cam storage chamber 47 is designed to be able to store a horizontally long rectangular plate so as to be horizontally long in the left-right direction. The cam housing chamber 47 is provided with holes 49 and 51 (see FIG. 3) in the horizontal direction. The drive motor 21 side has a closed closing hole 49, most of the spring 53 is accommodated in the closing hole 49, and a part protrudes into the cam accommodation chamber 47. The main roll gear 19 side has a through hole 51.

Reference numeral 55 denotes a cam plate, and the cam plate 55 has a horizontally long rectangle. The cam groove 57 of the cam plate 55 has an oval shape, and its long axis is inclined obliquely downward from the horizontal direction. A female screw hole 59 is continuously formed in the cam plate 55.
When the cam plate 55 is accommodated in the cam accommodating chamber 47, the plate surface becomes parallel to the axial direction of the roll shafts 7 and 13 of the main roll 3 and the sub-roll 9 in a state where the cam plate 55 is set in a horizontally long state. Since there is room in the cam housing chamber 47, the cam housing chamber 47 can be slid in the left-right direction while maintaining a parallel relationship.

Reference numeral 61 denotes a handle, and a male screw shaft 63 of the handle 61 is inserted into the female screw hole 59 through the through hole 51 and screwed. Therefore, the cam plate 55 can be moved by turning the handle 61 and causing the male screw shaft 63 to be screwed or screwed relative to the cam plate 55.
Since the cam plate 55 is elastically in contact with the spring 53 protruding toward the cam housing chamber 47 side, the cam plate 55 can be moved minutely by a handle operation by using this spring action together. Yes.

An air chamber 65 for an air piston is provided in the cam housing chamber 47 so as to communicate with the upper side. The air chamber 65 is provided with ports on the bottom side and the top side. The air chamber 65 is provided with a through hole 69 on the upper side so as to face the lower through hole 67 communicating with the cam housing chamber 47 side.
In FIG. 6, reference numeral 71 denotes a cam follower integrated piston, and a flange 75 projects from the outer periphery of the piston portion 73. Further, a pair of attachment pieces 77, 77 are descended from the bottom side of the piston portion 73, and a cylindrical cam follower 79 is supported by the attachment pieces 77, 77 so as to be suspended in the axial direction. As shown in FIG. 6, the cam follower 79 is passed through and engaged with a cam groove 57 of the cam plate 55.

  The cam follower integrated piston 71 is accommodated in the above-described chamber. As shown in FIGS. 2 and 3, the piston portion 73 is accommodated in the air chamber 65 with the axial direction up and down, and the flange 75 slidably contacts the inner peripheral surface of the air chamber 65 to partition the air chamber 65 up and down. ing. Further, the head portion side of the piston portion 73 is in sliding contact with the through hole 69, and the bottom portion side is in sliding contact with the through hole 67. Therefore, the piston portion 73 maintains sliding contact with the through holes 67 and 69 of the air chamber 65 on the bottom side of the head side, and the section above the flange 75 forms a closed chamber that communicates only with the port on the top side. The lower compartment forms a closed chamber that communicates only with the bottom port.

  The attachment pieces 77, 77 enter the cam housing chamber 47 through the through hole 67, and the cam follower 79 is engaged with the cam groove 57 of the cam plate 55 accommodated therein. The cam groove 57 is provided with a gap vertically so that the cam follower 79 can be lifted, and the cam follower 79 can move up and down within the range of the upper and lower groove edges of the cam groove 57. The amount of movement of the piston 71 in the vertical direction is restricted within this range, and the piston 71 cannot move up and down before the flange 75 comes into contact with the upper or lower surface of the closed chamber. The piston 71 can be moved by a minute distance.

As shown in FIGS. 2 and 3, the upper surface of the head portion of the piston portion 73 is largely hemispherically recessed to form a large receiving portion 81.
Reference numeral 83 denotes a plate bar-like working piece. The operating piece 83 is disposed so as to be long in the front-rear direction, and a contact portion 85 that is convex in a hemispherical shape is attached to the lower surface of the operating piece 83. The contact portion 85 is in contact with the large receiving portion 81 on the piston portion 73 side in a rotating pair. Further, the rear end side of the operating piece 83 is placed on the flat surface 45 of the support shaft 43 fixed to the holding member 25 and is fixed by a bolt 87.

A small receiving portion 89 is also formed in the upper surface on the front end side of the operating piece 83 in a small hemispherical shape.
A block 91 is disposed so as to be orthogonal to the operating piece 83, and a shaft portion of a mushroom-shaped pressing portion 95 is attached to a bottom concave portion of the block 91 via a spring 93, and the ball head is downward The small receiving portion 89 is in contact with the small receiving portion 89 in a rotating manner.
The pressing portion 95 on the block 91 side and the contact portion 85 on the operating piece 83 side are in a similar relationship, and are coaxial on the top and bottom.

The above mechanism is schematically shown in FIG. In this figure, for the convenience of visual recognition, the air piston to cam mechanism is illustrated with its position changed by 90 degrees so that the handle 61 is on the left side. The same applies to FIGS. 9 and 11 below.
As shown in the figure, the vertical movement of the piston portion 73 is converted into the swing of the operating piece 83 through contact with the rotating pair portion, and the holding member 25 on the opposite side also swings in the same direction across the swing center. To do. Since the spring 93 is always contracted and the operating piece 83 is pushed toward the piston portion 73, the swinging of the operating piece 83 does not occur when the piston portion 73 is lowered even if the piston portion 73 and the operating piece 83 are not connected. Follow.

Release / clamping means is constituted by the swinging means described above, and movement corresponding to the release / clamping operation is created by swinging.
The release / clamping operation will be described with reference to FIG. 9 and FIG.
<Release action>
As shown in FIG. 9, when air is supplied to the upper port 97 of the cam housing chamber 47, the piston portion 73 descends as shown by the arrow, and air is discharged from the lower port 99 in accordance with the descent. As the piston portion 73 descends, the operating piece 83 swings counterclockwise as indicated by the arrow while maintaining the rotational pair relationship.
As shown in FIG. 10, the holding member 25 also swings in the same direction together with the counterclockwise swing of the operating piece 83, so that it moves upward in the vertical direction, and the sub-roll 9 The roll part 11 is separated from the roll part 5 of the main roll 3 to create a “release operation” movement.

<Clamping operation>
The clamping operation is the reverse movement.
As shown in FIG. 9, when air is supplied to the lower port 99 of the cam housing chamber 47, the piston 71 rises as shown by the arrow, and air is discharged from the upper port 97 according to the rise. Due to the upward movement of the piston portion 73, the operating piece 83 swings clockwise as shown by the arrow while maintaining the rotational pair relationship against the downward biasing force of the spring 93.
As shown in FIG. 10, the holding member 25 also swings in the same direction together with the clockwise swing of the operating piece 83, so that it moves downward in the vertical direction. The roll unit 11 approaches the roll unit 5 of the main roll 3 to create a “clamping” movement.

<Sub-roll separation distance>
The lowering of the piston portion 73 during the release operation becomes a limit when the cam follower 79 contacts the lower edge of the cam groove 57, and the upward movement of the piston portion 73 during the clamping operation causes the cam follower 79 to move to the upper edge of the cam groove 57. It becomes a limit where it abuts. Thus, since the vertical movement of the cam follower 79 is regulated between the upper and lower edges of the cam groove 57, the vertical distance between the cam grooves 57, that is, the lift amount is set small, and the piston portion 73 is reciprocated. Regardless of the configuration on the air piston side, a minute movement of the sub-roll 9 during the release / clamping operation is realized.

<Roll interval adjustment>
Next, “roll interval adjustment” related to the clamping operation will be described.
During the clamping operation of the plate material (S), the roll portions 5 and 11 of the main roll 3 and the sub-roll 9 are closest to each other. At this time, the piston portion 73 is at the rising limit, and the cam follower 79 is camped. It hits the upper edge of the groove 57.
The vertical interval of the cam groove 57 of the cam plate 55 is the same in a certain left and right range, but since the cam groove 57 is inclined, the upper edge thereof becomes lower as it goes from the right to the left. Therefore, by turning the handle 61 and moving the cam plate 55 in the left-right direction as shown by the arrow, the cam groove 57 can be displaced to change the height of the upper edge side of the portion where the cam follower 79 is engaged.
FIG. 11 shows an example in which the roll interval is adjusted by changing the height. In the “corresponding to the thick plate”, the cam groove 57 is a portion where the upper edge is lowered, and the cam follower 79 is moved up and down. In the “corresponding to the thick plate”, the cam groove 57 is a portion where the upper edge is raised. It is a part that moves up and down.

A control system 101 is attached to the plate material feeding apparatus 1 as shown in FIG.
The control system 101 controls the supply of air from the air source 107 to the air chamber 65 by switching the solenoid valve 105 with the controller 103 in response to the press angle signal from the press device (P). The operation of the drive motor 21 is controlled via the driver 109.
Accordingly, the plate material feeding device 1 operates in cooperation with the press device (P).

Hereinafter, the linkage operation will be described with reference to FIG.
A predetermined part of the plate material (S) is supplied to the press device (P) by “feed start” to “feed” to “feed end”, and the pilot pin (p1) of the upper die (U) of the press device (P) is lowered. When descending toward the side mold (L), the release operation is started to release (release) the plate material (S), positioning by inserting the pilot pin (p1) to punching punch (p2) or drilling pump (p3) The release state is maintained until material processing by (1), and the clamp operation starts when the pilot pin (p1) starts to rise.
This series of operations is repeated, the plate material (S) is intermittently supplied from the plate material feeding device 1 to the press device (P), and press processing is performed by the press device (P).

According to the plate material feeding device 1 of the present invention, the sub-roll 9 is rigidly supported by the holding member 25 without using a coupling or the like. Synchronization is maintained.
In addition, the material is fed only by rotating the drive motor 21, the roll interval is adjusted according to the thickness of the material, the cam plate is moved, and the release operation is performed only by switching the air supply combined with a solenoid valve or the like. Because it is possible to respond, it is possible to create all the operations necessary for press work with a combination of simple configurations.
Further, by using the cam mechanism, the piston of the air piston can be moved minutely, and there is no need to use special dimension management or a special air piston, and the configuration of the entire apparatus can be simplified.
In addition, since the swing mechanism for creating the necessary operation is concentrated on the upper sub-roll side, the simplification of the configuration described above can be combined with the reduction in the size of the entire apparatus.
In addition, since the gears maintain the above-mentioned meshing, it is not necessary to consider the impact at the start of gear meshing, and maintenance is easy.

The embodiment of the present invention has been described in detail above. However, the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change without departing from the gist of the present invention. included.
That is, even if there is a difference in structure as long as it satisfies the claimed functional characteristics, it is included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Plate material feeding device 3 ... Main roll 5 ... Roll part 7 ... Roll axis 9 ... Sub roll 11 ... Roll part 13 ... Roll axis 15 ... Base side housing 16 ... Material guide 17 ... Bearing 19 ... Main roll gear 21 ... Drive motor 23 ... Motor shaft 25 ... Holding member 27 ... Connection part 29 ... Roll support part 31 ... Arm part 33 ... Edge 35 ... Bearing 37 ... Sub-roll gear 39 ... Intermediate gear 40 ... Rotation center 41 ... Idler gear 43 ... Support shaft 45 ... Plane 47 ... Cam accommodating chamber 49 ... Closure hole 51 ... Through hole 53 ... Spring 55 ... Cam plate 57 ... Cam groove 59 ... Female screw hole 61 ... Handle 63 ... Male screw shaft 65 ... Air chamber 67, 69 ... Through hole 71 ... Cam follower integrated piston 73 ... Piston part 75 ... 77 ··· Mounting piece 79 ··· Cam follower 81 ··· Large receiving portion 83 · · · Operation piece 85 · · · Contact portion 87 · · · Bolt 89 · · · Small receiving portion 91 · · · Block 93 · · · Spring 95 · · · Pressing piece 97 ... upper port 99 ... lower port 101 ... control system 103 ... control 105 ... solenoid valve 107 ... air source 109 ... driver S ... plate material P ... press device

Claims (7)

A release member that has a pair of upper and lower main rolls and sub-rolls, and that releases a plate material sandwiched by the pair of rolls, a plate material sandwiching unit that sandwiches a plate material between the rolls, a roll rotation drive unit that rotationally drives the pair of rolls In the plate material feeding device comprising means and roll interval adjusting means for adjusting the roll interval of the pair of rolls,
The roll rotation driving means is interposed between the drive motor coupled to the main roll, the main roll gear fixed to the main roll, the sub-roll gear fixed to the sub-roll, and both the gears. It is composed of a gear meshing type drive transmission unit with a plurality of transmission gears,
The release means includes a holding member that rotatably holds the sub-roll gear, and a holding member swinging means that swings the holding member while maintaining the meshing of the gear.
During the release operation, the sub-roller is separated from the main roll by swinging the holding member ,
The plate member clamping means and the holding member swinging means are configured by an air piston that extends the piston in the forward / backward direction, a cam follower provided at one extension portion of the piston, and a lift cam member that engages the cam follower. A cam mechanism and a working member fixed to the holding member side and in contact with the other end side extension portion of the piston by a rotating pair,
The plate material feeding device according to claim 1 , wherein the holding member swings in the clamp / release direction integrally with the operating portion by the vertical movement of the piston . In the board | plate material feeding apparatus described in Claim 1,
A plate material feeding device comprising: an urging means that elastically urges the operating portion in a release direction at a position opposite to the rotating pair side with the piston . In the board | plate material feeding apparatus described in Claim 1 or 2,
A plate material feeding device characterized in that the vertical movement distance at the time of piston clamping / release coincides with the vertical movement distance of a cam follower engaged with a cam groove of a lift cam member . In the board | plate material feeding apparatus in any one of Claim 1 to 3,
The roll interval adjusting means comprises a cam groove formed in the lift cam member and extending in the lateral direction while inclining, and a displacement means for the cam groove . In the board | plate material feeding apparatus described in Claim 4 ,
The displacing means is connected to the housing for accommodating the lift cam member so as to be movable in the lateral direction, the female screw portion formed through the side portion of the housing, and the lift cam member, and the male screw is formed on the outer surface. A connecting shaft and a handle attached to the connecting shaft and extending from the housing are configured such that a cam groove with which the cam follower engages is displaced by a relative screw advance / retreat operation of the connecting shaft by the handle. A sheet feeder that is characterized. In the board | plate material feeding apparatus in any one of Claim 1 to 5,
The holding member holds an even number of transmission gears together with the sub-roll gear so as to be rotatable with a fixed relative positional relationship, and its swing center is coaxial with the rotation center of the transmission gear meshing with the main roll gear. The board | plate material feeder characterized by the above-mentioned. In the board | plate material feeding apparatus in any one of Claim 1 to 6,
The roll rotation driving means is configured to intermittently drive the pair of rolls and to supply the plate material intermittently to the press device.

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