JPH0543951Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a feed roll device that is used when conveying a plate material to a press machine or the like, and for intermittently conveying the plate material.

[Prior art] This type of conventional feed roll device includes:
For example, the one shown in FIG. 9 is known. This feed roll device includes a main roll 1 and a sub roll 2 that cooperate with each other to intermittently convey the plate material T to a press device (not shown). The main roll 1 is rotatably supported by a frame (not shown), and is intermittently rotated in one direction by a crankshaft of a press device via a link mechanism (both not shown). ing. On the other hand, the sub-roll 2 has both ends rotatably supported by the central portions of a pair of sub-roll arms 3, and is connected to the main roll 1 by a gear mechanism (not shown) provided between the sub-roll 2 and the main roll 1.
It is designed so that it can be rotated at the same circumferential speed.

One end of the sub-roll arm 3 is rotatably supported by a support shaft 4. This support shaft 4 includes a large diameter portion 4a that rotatably supports the sub roll arm 3, and a small diameter portion 4b that is rotatably supported by the frame, and the large diameter portion 4a and the small diameter portion 4b are eccentrically arranged. It is being Further, the central part of the sub-roll arm 3 is moved from the sub-roll 2 side to the main roll 1 by a set spring (not shown).
The sub roll 3 is biased toward the side, and the sub roll 3 is pressed against the plate material T by the biasing force of this set spring. Furthermore, a camshaft 5 is arranged on the other end side of the sub-roll arm 3. This camshaft 5 has a flattened surface 5a formed on one side of the cylinder, and the flattened surface 5a is connected to the sub roll arm 3.
The set spring is disposed facing the surface facing the biasing direction of the set spring. A gap W of about 0.02 mm is normally formed between the flattened surface 5a and the sub-roll arm 3. The camshaft 5 is configured to be rotated by a predetermined angle when the main roll 1 and the sub-roll 2 stop and press processing by the press device starts.

In the feed roll device having the above configuration, when the main roll 1 rotates, the plate material T sandwiched between the main roll 1 and the sub roll 2 is conveyed in the direction of arrow A. When the main roll 1 and the sub-roll 2 stop, the camshaft 5 is rotated, thereby the sub-roll arm 3 is rotated about the support shaft 4, and the sub-roll 2 is separated from the plate material T. As a result, the plate material T becomes in a state where it can move freely. At the same time, the positioning pin (not shown) of the press device is fitted into the positioning hole of the plate material T, and the plate material T is positioned. After that, pressing is performed.

Here, there is an unavoidable manufacturing error in the thickness of the plate material T. For this reason, if the gap W is too small, the sub roll arm 3 will come into contact with the camshaft 5 when conveying the plate material T whose thickness is thinner than the nominal dimension. As a result, the sub roll 2 cannot press the plate material T, and the plate material T cannot be conveyed. On the other hand, if the gap W is too large, it will take time for the sub-roll arm 3 to rotate after the camshaft 5 begins to rotate and for the sub-roll 2 to move away from the plate material T, which will reduce the efficiency of the press operation. Therefore, the gap W is precisely adjusted to about 0.01 to 0.02 mm by appropriately rotating the support shaft 4.

In addition, when transporting another plate material T having a different thickness, if the support shaft 4 is not adjusted,
The size of the gap W changes depending on the change in plate thickness. Therefore, also in this case, the size of the gap W is adjusted by appropriately rotating the support shaft 4.

[Problems to be Solved by the Invention] In the conventional feed roll device described above, the size of the gap W is adjusted visually or by using a gap gauge or the like. However, when adjusting by the former method, there is a problem in that the size of the gap W varies. Further, when using a gap gauge, although the gap W can be adjusted with high precision, there is a problem in that the adjustment takes time. Further, when attempting to convey plate materials having greatly different thicknesses, it is necessary to rotate the support shaft 4 by a large amount. However, when the support shaft 4 is rotated significantly, the center of the large diameter portion 4a moves in the left-right direction, and the center of the sub roll 2 moves toward the main roll 1 accordingly.
The object moves left and right with respect to the center of the object. For this reason, there is a problem in that the conveying direction of the plate material T that has passed between the main roll 1 and the sub roll 2 is not horizontal, but is shifted either upward or downward. In other words, it is not possible to increase the amount of rotation of the support shaft 4 without changing the direction in which the plate material T is carried out. Therefore, there is a problem that the range of the thickness of the plate material T that can be transported becomes extremely narrow.

This idea was made to solve the above problem, and it is a feed roll device that can adjust the gap with high precision in a short time and does not change the conveying direction of the plate material over a wide range of plate thickness. The purpose is to provide

[Means for Solving the Problems] In order to achieve the above object, this invention moves support pieces that rotatably support both ends of a support shaft on a frame in a direction in which the sub roll approaches and separates from the main roll. A fixing means for fixing the support piece is provided between the support piece and the frame, an auxiliary spring is provided between the frame and the sub-roll arm to bias the sub-roll arm toward the cam shaft, and an auxiliary spring is provided between the frame and the sub-roll arm, and The sub-roll can move within a predetermined range in the direction of approaching and separating from the main roll with respect to either the sub-roll arm or the support piece.

Here, the predetermined range corresponds to the gap W in the conventional example, and is set to 0.01 to 0.02 mm.

[Function] The plate material to be conveyed is sandwiched between the main roll and the sub roll. Next, the fixation to the support piece by the fixing means is released. Then, the sub-roll is pressed into contact with the plate material by the biasing force of the set spring, and the sub-roll arm is pressed into contact with the camshaft by the biasing force of the auxiliary spring.
As a result, the sub roll arm is fixed in position.
In this state, if the support shaft is made movable within a predetermined range relative to the sub-roll arm, the sub-roll and support piece are moved by the predetermined range. On the other hand, when the support shaft is made movable relative to the support piece, the support piece is moved by a predetermined range. Here, the direction of movement in each case is such that when the support piece is fixed by the fixing means, the end of the sub-roll arm on the sub-roll side is centered on the contact area between the other end and the camshaft. The direction should be such that it can be moved closer to the main roll.

By moving in this way, if the plate material is thinner than the nominal size, the sub roll can be moved closer to the main roll due to the biasing force of the set spring and the auxiliary spring, and conversely, if the plate material is thinner than the nominal size, If it is thick, the sub roll can move in a direction away from the main roll against the urging force of both springs.

Further, when the camshaft is rotated to rotate the sub-roll arm in a direction in which the sub-roll is separated from the main roll, the sub-roll arm rotates around the end on the sub-roll side at the beginning of rotation. Therefore, the sub-role does not move away from the main role. However, when the amount of rotation of the sub-roll arm reaches the predetermined range, the sub-roll arm rotates about the support shaft, and the sub-roll moves away from the main roll.

Furthermore, since the support piece supporting the support shaft is movable in the direction connecting the centers of the main roll and the sub-roll, the sub-roll moves substantially along the direction connecting the centers. Therefore, the center of the sub-roll does not deviate from the original direction connecting the respective centers after the movement. Therefore, the direction in which the plate material is carried out does not change. As a result, the range of thicknesses of plates that can be conveyed can be greatly expanded compared to the conventional method.

[Embodiment] An embodiment of this invention will be described below with reference to FIGS. 1 to 8.

In the figure, reference numeral 11 indicates a frame. This frame 11 includes a pair of side plates 11a, 11a that are spaced apart from each other in the left and right directions, and a pair of side plates 11a, 11a.
11a, and includes a back plate 11b fixed by bolts (not shown) and a reinforcing shaft 11c fixed by bolts 12.
A main roll shaft 13 with its axis oriented in the horizontal direction is rotatably supported by the pair of side plates 11a, 11a. This main roll shaft 13 is configured to be rotated by a set range in forward and reverse directions by a crankshaft of a press device via a link mechanism (not shown).

Further, a main roll 14 is rotatably provided on the main roll shaft 13. A one-way clutch 15 of known construction is provided between the main roll 14 and the main roll shaft 13. This one-way clutch 15 allows the main roll 14
is rotated in one direction (clockwise in FIG. 1), but not in the other direction. Note that the main roll 14 is constantly braked by a brake mechanism (not shown) provided between it and the side plate 11a.

In addition, each side plate 11a, 11a has a support mechanism 1.
6 are provided respectively, and these support mechanisms 1
The sub roll 26 is supported by 6 and 16 so as to be rotatable and movable in the vertical direction. here,
Since each of the support mechanisms 16, 16 has the same configuration, except in special cases, only one of the support mechanisms 16 will be explained, and the other support mechanism 16 will be explained.
For the same parts, the same reference numerals are given to the same parts, and the explanation thereof will be omitted.

A groove 17 extending in the vertical direction is formed in the upper part of the inwardly facing surface of the side plate 11a. This groove 17
A support piece 18 is provided to be slidable in the vertical direction. As shown in FIG. 1, this support piece 18 has a rectangular plate shape, and a fitting groove 18a of a constant width is formed in its upper end surface. As shown in FIG. 5, a fitting hole 19 whose axis is oriented in the horizontal direction is formed in the outward facing surface of the side plate 11a corresponding to the fitting groove 18a. This fitting hole 19 has a nut 20 of the same diameter.
are rotatably fitted. The inner end of this nut 20 projects into the groove 17, and a flattened portion 20a is formed at the projecting end.
Rotation of the nut 20 is prevented by fitting the flat portion 20a into the fitting groove 18a. Note that the nut 20 provided on the other side plate 11a is the same as the nut 20 provided on the one side plate 11a.
0 and its twist direction are opposite.

Further, each nut 20, 20 has a fitting groove 18a.
Each end of the fixed shaft 21 passing through is screwed together. The fixed shaft 21 is formed with a flange 21a that faces the support piece 18. By tightening the nut 20 and tightening the support piece 18 to the flange 21a, the support piece 18 is attached to the side plate 11a.
It will be supported so that it cannot move vertically. Note that the nut 20 is tightened by rotating a handle 22 provided at one end of the fixed shaft 20 in one direction, and is released by rotating the handle 22 in the other direction.

A main roll 1 is provided at the lower end of the support piece 18.
A through hole 18b extending parallel to 4 is formed. One end portion of the support shaft 23 is inserted and supported in the through hole 18b. The diameter of the end of the support shaft 23 inserted into the through hole 18b is about 0.01 to 0.02 mm smaller than the diameter of the through hole 18b.
Therefore, the support shaft 23 can move in the vertical direction relative to the support piece 18 by the difference in diameter.

Further, a sub-roll arm 24 is rotatably fitted into the inner part of the support shaft 23 adjacent to the support piece 18. One end of this sub-roll arm 24 supports one end of a sub-roll shaft 25 that is parallel to the main roll 14 and located almost directly above it. A sub-roll 26 is rotatably supported on the sub-roll shaft 25. This sub-roll 26 is for cooperating with the main roll 14 to convey a plate material (not shown) to a press device, and has a gear portion 26a formed at one end thereof.
meshes with the gear portion 14a of the main roll 14,
This allows it to rotate at the same circumferential speed as the main roll 14.

Further, a set spring 28 is provided between one end of the sub-roll arm 24 and an adjustment screw 27 screwed into the upper part of the side plate 11a to bias the one end of the sub-roll arm 24 downward. .
The set spring 28 presses the sub roll 26 into contact with the main roll 14 or the plate material. Note that the biasing force of the set spring 28 can be changed as appropriate by changing the screwing amount of the adjustment screw 27.

Furthermore, a contact piece 29 made of a hard material such as hardened steel is provided on the upper surface of the other end of the sub-roll arm 24 . A cam shaft 30 that contacts this contact piece 29 is rotatably provided on the side plate 11a. This camshaft 30 has a flattened surface 30a formed in a portion facing the contact piece 29, and this flattened surface 30a is brought into contact with the contact piece 29. Therefore, when the camshaft 30 is rotated, the camshaft 30 presses the other end of the sub-roll arm 24 downward via the contact piece 29, causing the sub-roll 24 to rotate around the support shaft 23.
6 is moved in a direction away from the main roll 14 against the biasing force of the set spring 28. Further, an auxiliary spring 31 is provided between the lower surface of the other end of the sub-roll arm 24 and the back plate 11b to bias the other end of the sub-roll arm 24 upward. The contact piece 29 is pressed into contact with the camshaft 30 by the biasing force of the auxiliary spring 31.

The camshaft 30 is shown in FIGS. 2, 4, and 5.
As shown in the figure, it is adapted to be rotated by a main roll shaft 13.

That is, a rotating arm 32 is provided at one end of the main roll shaft 13 that projects outward from the side plate 11a. The rotating arm 32 has a large diameter hole 32a formed at its lower end, a small diameter hole 32b formed at its upper end, and slits 32c, 32d extending from each hole 32a, 32b to the side surface. The main roll shaft 13 is inserted into the large diameter hole 32a. A mounting shaft 33 extending toward the side plate 11a is inserted into the small diameter hole 32b. The main roll shaft 13 and the mounting shaft 33 are fixed to the rotating arm 32 by bolts 34 that act to narrow the widths of the respective slits 32c and 32d.

The mounting shaft 33 has an eccentric shaft portion 33a eccentric to the portion inserted into the small diameter hole 32b, and a roller 35 is rotatably provided on the eccentric shaft portion 33a. The position of this roller 35, that is, the position from the center of the main roll shaft 13, can be adjusted by appropriately rotating the mounting shaft 33.

On the other hand, a driven arm 36 is fixed to the camshaft 30. This driven arm 36 extends toward the left in a substantially horizontal direction, and a cam 37 is rotatably provided at the center thereof via a shaft 38. One end of the cam 37 is abutted against the driven arm 36 by a spring (not shown) disposed between the cam 37 and the driven arm 36 . In this state, it cannot rotate clockwise in FIG. 2, but can rotate counterclockwise. The other end of the cam 37 is connected to the main roll shaft 1
It is located within the range of the rotation locus of the roller 35 as the roller 35 rotates. Therefore, when the roller 35 rotates around the main roll shaft 13, it comes into contact with the cam 37.

Here, when the roller 35 rotates clockwise from the state shown in FIG. 2, when the roller 35 butts against the cam 37, the cam 37 rotates counterclockwise against the biasing force of the spring. Therefore, the driven arm 36 does not rotate. On the other hand, Koro 35
rotates counterclockwise after passing the cam 37, and when it hits the cam 37, the driven arm 36 rotates clockwise as the roller 35 rotates because the cam 37 cannot rotate clockwise. It will rotate to.

Note that a manual operation section 36a for manually operating the driven arm 36 is formed at the left end portion of the driven arm 36.

In the feed roll device having the above configuration, when conveying a plate material, the driven arm 36 is rotated clockwise or counterclockwise by manual operation,
Rotate the camshaft 30. Then, the sub-roll arm 24 rotates clockwise in FIG. 1 against the biasing forces of the set spring 28 and the auxiliary spring 31.
The sub roll 26 is separated from the main roll 14. While maintaining this state, a plate material is inserted between the sub roll 26 and the main roll 14. Thereafter, the driven arm 36 is rotated back. Then, the biasing force of the set spring 28 and the auxiliary spring 31 causes the sub roll arm 24 to rotate counterclockwise. Then, when the sub roll 26 comes into contact with the plate material, the sub roll arm 24 stops. At this time, since the sub-roll arm 24 is fixed in position by the sub-roll shaft 25 and the support shaft 23, a slight gap is created between the flattened surface 30a of the camshaft 30 and the contact piece 29.

Next, the handle 22 is turned to loosen the nut 20 and the position fixed to the support piece 18 is released. Then, due to the biasing force of the auxiliary spring 31, the sub-roll arm 24 rotates counterclockwise about the sub-roll shaft 25, hits the camshaft 30, and stops. At the same time, the support piece 18 moves downward due to its own weight, and its upper inner peripheral surface abuts against the upper outer peripheral surface of the support shaft 23 and stops.
As a result, the lower inner peripheral surface of the support piece 18 and the support shaft 2
A gap corresponding to the difference in diameter is created between the outer circumferential surface of the lower side of No. 3 and the lower outer peripheral surface of No. 3. In this state, the nut 30 is tightened to fix the support piece 18.

Next, the press device is started. Then, the main roll shaft 13 is rotated clockwise and counterclockwise by the rotation of the crankshaft of the press device. When the main roll shaft 13 rotates clockwise, the main roll 14 rotates in the same direction, and the sub roll 26 rotates counterclockwise, thereby conveying the plate material.

Here, there are variations in the thickness of each part of the board,
When a portion having a thickness different from that of the set portion reaches between the main roll 14 and the sub roll 26, if the thickness is thin, the through hole 18
Since there is a gap between the lower inner circumferential surface of b and the lower outer circumferential surface of the support shaft 23, the sub-roll arm 24 rotates clockwise around the contact area between the camshaft 30 and the contact piece 29. It is rotatable. Therefore, the sub roll 26 moves toward the main roll 14 by an amount corresponding to the thinner thickness, and maintains contact with the plate material. Therefore, conveyance of the plate material will not become impossible. On the other hand, when the thickness is thick, the sub roll arm 24 is centered around the support shaft 23, and the set spring 28
and rotates clockwise against the biasing force of the auxiliary spring 31. Therefore, the sub-role 26 is
It moves in the direction away from the main roll 14 following the increase in the thickness of the plate material. In any case, the plate material can be transported smoothly.

Note that when the main roll shaft 13 rotates clockwise, the roller 35 hits the cam 37 during the rotation, but the cam 37 rotates against the spring. Therefore, the driven arm 35 does not rotate, and therefore the camshaft 30 does not rotate.

Further, when the main roll shaft 13 rotates clockwise by a set angle, it starts rotating counterclockwise. Then, due to the action of the one-way clutch 15, the rotational force is no longer transmitted to the main roll 14, the main roll 14 is stopped by the brake mechanism, the sub roll 26 is stopped, and the conveyance of the plate material is interrupted. On the other hand, due to the rotation of the main roll shaft 13 in the counterclockwise direction, the roller 35 is rotated to the cam 37.
I bump into it. Then, the driven arm 33 is rotated clockwise in FIG. 2, and in turn the camshaft 30 is rotated in the same direction. When the camshaft 30 rotates, the sub roll arm 24 begins to rotate. At this time, since there is a gap between the upper inner circumferential surface of the through hole 18b and the upper outer circumferential surface of the support shaft 23, the sub-roll arm 24 first moves in the clockwise direction in FIG. Rotate to. When the upper outer circumferential surface of the through hole 18b and the upper outer circumferential surface of the support shaft 23 come into contact, the sub roll arm 24 rotates clockwise about the support shaft 23. As a result, the sub roll 26 separates from the plate material. Main roll shaft 13
When the roller 34 rotates further and the roller 34 separates from the cam 37, the sub-roll 26 is brought into contact with the plate material by the biasing force of the set spring 28 and the auxiliary spring 31, and returns to its original state.

In the above embodiment, by making the diameter of the through hole 18b of the support piece 18 larger than the diameter of the support shaft 23, the support shaft 23 is moved in the vertical direction with respect to the support piece 18 (the sub roll 26 is aligned with the main roll 14). However, while making the diameters of the through hole 18b and the support shaft 23 the same, the hole 24a of the sub roll arm 24 through which the support shaft 23 passes is
The diameter may be made larger by about 0.01 to 0.02 mm, thereby making the support shaft 23 (and the support piece 18) movable in the vertical direction relative to the sub roll arm 24.

In the above embodiment, the support shaft 23 is disposed between the sub-roll shaft 25 and the camshaft 30, but the left end of the sub-roll arm 24 in FIG.
It may be placed to the left. However, in that case, the camshaft 30 is brought into contact with the lower side of the sub-roll arm 24, and the auxiliary spring 31 is urged downward. Moreover, contrary to the above embodiment, the support piece 18 is moved upward against its own weight, and the nut 30 is tightened with the lower inner peripheral surface of the through hole 18b in contact with the outer peripheral surface of the support shaft 23. It needs to be tightened.

[Effects of the invention] As explained above, according to the food roll device of this invention, the support shaft can be moved relative to the support piece or the sub-roll arm by a preset range in the direction in which the sub-roll approaches and separates from the main roll. Therefore, the gap corresponding to the gap in the conventional food roll device can be easily set with high precision. In addition, since the support piece that supports the support shaft can be moved in the direction in which the sub-roll approaches and moves away from the main roll, when adjusting the plate thickness, it is possible to move the sub-roll only in the direction in which it approaches and moves away from the main roll. The sub-rolls do not move in a direction perpendicular to the direction in which they approach and separate. Therefore, even if the thickness of the plate material changes, it is possible to prevent the conveyance direction from changing. Therefore, effects such as being able to significantly expand the range of sheet thickness that can be transported can be obtained.

[Brief explanation of the drawing]

Figures 1 to 8 show an embodiment of this invention, with Figure 1 being a partially cutaway right side view, Figure 2 being a right side view, Figure 3 being a left side view, and Figure 4 being a left side view. is a sectional view taken along the - arrow in FIG. 1, FIG. 5 is a partially omitted plan view,
Fig. 6 is a sectional view taken along the - arrow in Fig. 1, Fig. 7 is a plan view of the sub-roll arm, Fig. 8 is a partially cutaway front view of the sub-roll arm, and Fig. 9 is a schematic configuration of a conventional feed roll device. FIG. 11...Frame, 14...Main roll, 1
8... Support piece, 20... Nut (fixing means), 2
3...Support shaft, 24...Sub roll arm, 26
...Sub roll, 28...Set spring, 30...
Cam shaft, 31...auxiliary spring.

Claims (1)

[Scope of utility model registration request] a frame, a main roll rotatably supported at both ends by the frame, a support shaft supported by the frame with its axis parallel to the axis of the main roll, and a support shaft rotatably supported at both ends of the support shaft. a pair of sub-roll arms supported by;
a sub-roll whose both ends are rotatably supported by the pair of sub-roll arms, and which intermittently conveys the plate material in cooperation with the main roll;
A set spring biases the sub-roll toward the main roll, and a set spring is rotatably provided on the frame and is driven to rotate when the main roll and sub-roll stop conveying the plate material, so as to move the sub-roll arm toward the support shaft. A feed roll device comprising a cam shaft that rotates around , and moves the sub roll in a direction away from the main roll against the biasing force of the set spring, wherein both ends of the support shaft are attached to the frame, respectively. A pair of support pieces rotatably supported are provided so as to be movable in a direction in which the sub-roll approaches and separates from the main roll, and movement of the support pieces in the direction in which the sub-roll approaches and separates from the main roll is prevented between the support pieces and the frame. a fixing means is provided, an auxiliary spring is provided between the frame and the sub-roll arm to bias the sub-roll arm toward the camshaft, and the support shaft is attached to either one of the sub-roll arm or the support piece. A feed roll device characterized in that it is movable within a predetermined range in the direction of approaching and separating from the feed roll device.