JPH06320393A - Drum rotating feeding device - Google Patents

Abstract

PURPOSE:To provide a drum rotatiing feeding device which is designed to simplify structure and reduce cost. CONSTITUTION:In a drum rotating feeding device to rotate a drum, rotatably mounted to a pedestal 11 through a rotary shaft 14, by a given angle arc at a time, a cam wheel 17 rotatable integrally with a drum is mounted on the rotary shaft 14. Meanwhile, an air cylinder 19 having a reciprocative cam roller 21 is disposed in relation to the cam wheel 17. Cam surfaces 33 and 35 to rotate the cam wheel 17 by a given angle arc through operation of a cam roller 21 are formed in the cam wheel 17 and a locking groove 32 and a locking protrusion 34 to stop and hold the cam wheel 17 are formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum rotary feed device for rotating a drum at a constant angle.

[0002]

2. Description of the Related Art As a drum rotary feeding device for rotating and feeding a drum at a constant angle, there is a drum belt feeding device which repeatedly feeds and stops a predetermined amount. In this drum rotary feed device, there is one in which a rotary drum is directly connected to an output shaft of an electric motor, a rotation angle is measured by a sensor, and the rotation is controlled by using this measurement angle. Then, the structure of the rotation control circuit becomes complicated and expensive. Therefore, it is general to mechanically drive and rotate the rotary drum and stop the positioning.

FIG. 8 is a sectional view of a conventional drum rotary feed device, FIG. 9 is a left side view of the drum rotary feed device, and FIG.
8 is a sectional view taken along line XX in FIG. 8, and FIGS. 11 and 12 are operation explanatory views of the drum rotary feed device.

As shown in FIG. 8 to FIG.
A rotary shaft 104 is supported by a pair of front and rear brackets 102, which are erected upright, via bearings 103, and a rotary drum 105 is attached. In addition, the friction plate 1 is placed close to the housing 106 inserted into one end of the rotary shaft 104.
07 is provided so as to be movable in the axial direction by the key 108. The friction plate 107 includes a washer 109 and a nut 11.
It is held in close contact with the housing 106 by 0 and the disc spring 111. Further, an air cylinder 115 having a cylinder rod 114 is installed between the mounting portion 112 of the gantry 101 and the arm portion 113 of the housing 106.

On the other hand, a ratchet wheel 117 is fixed to the rotary shaft 104 by a key 116, and ratchet teeth 118 are provided on the outer peripheral portion of the ratchet wheel 117.
Are formed. On the side of the rotary shaft 104, the tip of the locking claw 120 pivotally supported by the side wall 119 on the gantry 101 engages with the ratchet teeth 118 of the ratchet wheel 117 and is urged by the compression spring 121.

Thus, as shown in FIG. 11 and FIG.
When compressed air is supplied to or discharged from the air cylinder 115, the arm portion 113 is swung via the cylinder rod 114. Therefore, the housing 106 rotates intermittently around the rotating shaft 104. The friction plate 107 is brought into close contact with the housing 106 by the disc spring 111, and the locking claw 120 prevents rotation in the counterclockwise direction.
Rotates intermittently in the direction of the arrow.

[0007]

In the above-described conventional drum rotary feed device, the friction plate 107 is used for power transmission from the air cylinder 115 to the rotary drum 105, and by tightening the nut 110, this disc spring is used. 11
The power transmission is adjusted by changing the urging force of 1. However, if you tighten the nut 110 tightly,
The biasing force of the disc spring 111 increases and the frictional resistance between the friction plate 107 and the housing 106 increases, which impedes the backward movement operation of the air cylinder 115. On the other hand, nut 1
When 10 is loosened, the biasing force of the disc spring 111 becomes too small and the frictional resistance between the friction plate 107 and the housing 106 decreases, and the power transmission from the housing 106 to the friction plate 107 becomes insufficient. . Therefore, the rotating drum 1
In order to maintain the good operation and stop operation of 05, it is necessary to frequently adjust the compressive force of the disc spring 111 by tightening and loosening the nut 110, and there is a problem that maintenance is troublesome.

Further, the disc spring 1 is tightened by tightening the nut 110.
It is possible to increase the driving force of the air cylinder 115 by increasing the urging force of the air cylinder 11, increasing the pressure of the compressed air supplied to the air cylinder 115, or increasing the bore diameter of the air cylinder 115. . However, when the driving force of the air cylinder 115 is increased, the frictional resistance between the friction plate 107 and the housing 106 is increased, which may cause abrasion and damage of the contact surface, and the size of the device itself is increased. There was a problem of inviting.

The present invention solves such a problem, and an object thereof is to provide a drum rotary feed device having a simple structure and low cost.

[0010]

SUMMARY OF THE INVENTION A drum rotary feed device of the present invention for achieving the above object is a drum rotary feed device for rotating a drum having a rotary shaft by a predetermined angle. While integrally mounting a rotatable cam wheel, a cam roller at the tip of a drive cylinder is engaged with a plurality of cam grooves formed on one surface of the cam wheel, and the extension / retraction movement of the cam roller is rotated by the rotation movement of the cam wheel. It is characterized by being converted to.

[0011]

When the drive cylinder is operated to move the cam roller in one direction, the cam roller acts on the peripheral wall of the cam groove to rotate the cam wheel, whereby the drum integrated with the cam wheel rotates by a predetermined angle. Then, when the drive cylinder is operated in the opposite direction to move the cam roller in the other direction, the cam roller acts on the locking portion and the cam wheel stops, so that the drum is stopped and held. The drum can be rotated by a predetermined angle by this repeated operation.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a front view of a drum rotary feed device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II--II of FIG. 1, FIG. 3 is a front view of a cam wheel, and FIGS. 4 to 7 are drums. It is an operation explanatory view of a rotation sending device.

As shown in FIGS. 1 and 2, a pair of front and rear brackets 12 are erected on a pedestal 11, and a rotating shaft 14 is mounted on the pair of brackets 12 by bearings 13.
Is rotatably supported. And this rotating shaft 14
The rotary drum 1 is located between the pair of brackets 12.
5 is attached so as to be rotatable integrally.

A cam wheel 17 is provided at the end of the rotary shaft 14 so as to be rotatable integrally with the rotary shaft 14 by means of a key 16.
Is installed. On the other hand, on the side of the cam wheel 17, an air cylinder 19 is attached to an attachment stand 18 which is erected on the pedestal 11, and the air cylinder 19 is orthogonal to the rotation axis direction of the cam wheel 17. It has a cylinder rod 20 that can reciprocate in any direction. A cam roller 21 is attached to the tip of the cylinder rod 20.

Several cam grooves are formed in the cam wheel 17, and the cam roller 21 is engaged with the cam grooves so that the cam wheel 17 can be rotated by a predetermined angle. That is, as shown in FIG. 3, a moving groove 31 is formed on the plane portion of the cam wheel 17 along the circumferential direction, and a large number of insertion grooves 32 communicating with the moving groove 31 and opening to the outside are formed. The cam roller 21 is freely engageable with the grooves 31 and 32. Then, on the inner wall side of the moving groove 31 corresponding to each insertion groove 32, a cam surface 33 for rotating the cam wheel 17 by a predetermined angle is formed by the action of the cam roller 21, and is continuous with each cam surface 33. A locking projection 34 that stops the rotation of the lever cam wheel 17 is formed. Further, the cam roller 21 acts on the outer wall side of the moving groove 31 facing the cam surface 33, so that the cam wheel 1
A cam surface 35 for rotating 7 by a predetermined angle is formed,
The cam surface 35 is continuous with the wall surface of each insertion groove (locking groove) 32.

Then, first, when compressed air is supplied to the air cylinder 19 to extend the cylinder rod 20, the cam roller 21 is moved to the cam wheel 1 as shown in FIGS.
7 into one of the insertion grooves 32. Cylinder rod 20
4 is further extended, as shown in FIG.
By contacting and pressing the cam surface 33 of the cam wheel 17, the cam wheel 17 rotates in the clockwise direction in FIG. Therefore, the cam wheel 17 and the rotary shaft 14
The rotary drum 15, which is integrally rotatably attached via the, also rotates in the same direction. And cam wheel 1
7 (rotating drum 15) rotates by a predetermined angle, and as shown in FIG. 5, when the cam roller 21 comes into contact with the locking projection 34,
The rotation of the cam wheel 17 is restricted and the rotation of the rotary drum 15 is also stopped.

Next, when compressed air is supplied to the air cylinder 19 in the opposite manner to contract the cylinder rod 20, the cam roller 21 abuts the cam surface 35 of the cam wheel 17, as shown in FIG. The cam wheel 17 is rotated again in the clockwise direction in FIG. Therefore, the rotary drum 15, which is integrally rotatably connected to the cam wheel 17 via the rotary shaft 14, also rotates in the same direction as described above. Then, when the cam wheel 17 (rotating drum 15) rotates by a predetermined angle and the cam roller 21 enters the insertion groove 32 as shown in FIG. 7, the rotation of the cam wheel 17 is restricted and the rotating drum 1
The rotation of 5 also stops. At this time, since the cam roller 21 is fitted into the insertion groove 32 and the rotation stop state of the cam wheel 17 is maintained, idling of the rotary drum 15 is restricted.

By rotating the cam wheel 17 by the reciprocating motion of the air cylinder 19 in this way, the rotary drum 15 can be rotated and fed by a predetermined angle, and the rotary drum 15 can be held at a predetermined position. You can Therefore, the rotary drum 15 can be intermittently rotated by a predetermined angle by reciprocating the air cylinder 19.

[0020]

As described above in detail with reference to the embodiments, according to the drum rotary feeding device of the present invention, while the cam wheel which is rotatable integrally with the drum is mounted on the rotary shaft,
Since the cam roller at the tip of the drive cylinder is engaged with a plurality of cam grooves formed on one surface of the cam wheel so that the extension / retraction movement of the cam roller can be converted into the rotation movement of the cam wheel, it has been conventionally used. It is possible to simplify the structure by eliminating the friction plate and ratchet mechanism that were used, and to reduce the cost, and to improve the operating rate and reliability of the device without the need for frequent maintenance. You can

[Brief description of drawings]

FIG. 1 is a front view of a drum rotary feed device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a front view of a cam wheel.

FIG. 4 is an operation explanatory view of the drum rotary feed device.

FIG. 5 is an operation explanatory view of the drum rotary feeding device.

FIG. 6 is an operation explanatory view of the drum rotary feeding device.

FIG. 7 is an operation explanatory view of the drum rotary feed device.

FIG. 8 is a sectional view of a conventional drum rotary feed device.

FIG. 9 is a left side view of the drum rotary feeding device.

10 is a sectional view taken along line XX of FIG.

FIG. 11 is an operation explanatory view of the drum rotary feeding device.

FIG. 12 is an operation explanatory view of the drum rotary feed device.

[Explanation of symbols]

 11 Stand 14 Rotating Shaft 15 Rotating Drum 17 Cam Wheel 19 Air Cylinder 21 Cam Roller 31 Moving Groove 32 Inserting Groove (Locking Part) 33, 35 Cam Surface (Cam Part) 34 Locking Protrusion (Locking Part)

Claims (1)

[Claims] 1. A drum rotary feed device for rotating a drum having a rotary shaft by a predetermined angle, wherein a cam wheel rotatable integrally with the drum is attached to the rotary shaft while a plurality of cam wheels are formed on one surface of the cam wheel. A drum rotary feed device, characterized in that a cam roller at the tip of a drive cylinder is engaged with the cam groove of the above, and the extension / retraction movement of the cam roller is converted into the rotation movement of the cam wheel.