JP2984515B2 - Drum rotary feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

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

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

[0004] As shown in FIGS.
A rotating shaft 104 is supported on a pair of front and rear brackets 102 erected on the upper side via bearings 103, and a rotating drum 105 is mounted. In addition, the friction plate 1 is located near the housing 106 inserted into one end of the rotating shaft 104.
Reference numeral 07 is provided by a key 108 so as to be movable in the axial direction. The friction plate 107 includes a washer 109, a nut 11
0 and a disc spring 111 closely contact the housing 106. Further, an air cylinder 115 having a cylinder rod 114 is provided 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 rotating shaft 104 by a key 116, and a ratchet tooth 118 is provided on an outer peripheral portion of the ratchet wheel 117.
Are formed. On the side of the rotating shaft 104, the tip of a locking claw 120 pivotally supported by a side wall 119 on the gantry 101 is engaged with a ratchet tooth 118 of a ratchet wheel 117 and is urged by a compression spring 121.

As shown in FIGS. 11 and 12,
When compressed air is supplied to and discharged from the air cylinder 115, the arm 113 is swung via the cylinder rod 114. Therefore, the housing 106 rotates intermittently about the rotation shaft 104. The friction plate 107 is closely attached to 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-mentioned conventional drum rotary feeder, a friction plate 107 is used for transmitting power from the air cylinder 115 to the rotary drum 105. 11
The power transmission is adjusted by changing the urging force of No. 1. However, if the nut 110 is tightened strongly,
The urging force of the disc spring 111 increases, and the frictional resistance between the friction plate 107 and the housing 106 increases, thereby hindering the air cylinder 115 from returning. On the other hand, nut 1
If 10 is loosened, the urging force of the disc spring 111 becomes too small, the frictional resistance between the friction plate 107 and the housing 106 decreases, and the transmission of power from the housing 106 to the friction plate 107 becomes insufficient. . Therefore, the rotating drum 1
In order to properly maintain the operation and the stop operation of the spring 05, it is necessary to frequently adjust the compression force of the disc spring 111 by tightening and loosening the nut 110, and there is a problem that maintenance is troublesome.

Further, the nut 110 is tightened to
It is possible to increase the driving force of the air cylinder 115 by increasing the urging force of the air cylinder 11 and 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 increases, which may cause abrasion and breakage of the contact surface, and increase the size of the device itself. There was a problem that would invite.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a low-cost drum rotary feeder having a simple structure.

[0010]

According to a first aspect of the present invention, there is provided a drum rotary feeder for rotating a drum having a rotary shaft by a predetermined angle. Attach a rotatable cam wheel and move it along the circumference in the circumferential direction
A groove is formed, and the groove is inserted into the moving groove to open the outer periphery.
While the cam groove at the end of the drive cylinder
Roller can enter the moving groove through the insertion groove,
The cam roller moves forward due to the extension / retraction movement of the drive cylinder.
A plurality of cam surfaces formed on surfaces of the moving groove facing each other
To rotate the cam wheel by a predetermined angle.
It is characterized in that it can be transferred .

[0011]

When the cam cylinder is moved in one direction by operating the drive cylinder, the cam roller moves through the insertion groove.
By entering the groove and acting on one cam surface to rotate the cam wheel, the drum integrated with the cam wheel rotates by a predetermined angle. When the drive cylinder is operated in reverse to move the cam roller in the other direction, the cam roller acts on the other cam surface, and the cam wheel moves in the same direction.
The drum rotates in the same way by rotating at a predetermined angle and stopping.
Stopped and held. By repeating this operation, the drum can be rotated by a predetermined angle.

[0012]

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

FIG. 1 is a front view of a drum rotary feeder according to one 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. It is operation | movement explanatory drawing of a rotary feeder.

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

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

The cam wheel 17 is formed with several cam grooves, 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 in 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 outward are formed. The cam rollers 21 are freely engageable with the respective grooves 31 and 32. 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 by the action of the cam roller 21 is formed, and is continuous with each of the cam surfaces 33. A locking protrusion 34 for stopping the rotation of the lever cam wheel 17 is formed. In addition, 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 is moved.
7 is formed to rotate the cam 7 by a predetermined angle,
This cam surface 35 is continuous with the wall surface of each insertion groove (locking groove) 32.

When the 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
Is further extended, as shown in FIG.
Abuts against the cam surface 33 of the cam wheel 17 to be pressed, whereby the cam wheel 17 rotates clockwise in FIG. Therefore, the cam wheel 17 and the rotating shaft 14
, The rotary drum 15 attached so as to be rotatable integrally therewith also rotates in the same direction. And the cam wheel 1
7 (rotary drum 15) is rotated by a predetermined angle, and as shown in FIG.
The rotation of the cam wheel 17 is restricted, and the rotation of the rotary drum 15 also stops.

Next, when compressed air is supplied to the air cylinder 19 and the cylinder rod 20 is contracted, the cam roller 21 contacts the cam surface 35 of the cam wheel 17 as shown in FIG. The cam wheel 17 rotates clockwise again in FIG. Accordingly, the rotary drum 15 connected to the cam wheel 17 via the rotary shaft 14 so as to be rotatable integrally rotates in the same direction as described above. Then, as shown in FIG. 7, when the cam wheel 17 (rotary drum 15) rotates by a predetermined angle and the cam roller 21 enters the insertion groove 32, the rotation of the cam wheel 17 is regulated and the rotary drum 1 is rotated.
The rotation of No. 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 operation of the air cylinder 19 in this manner, 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. Can be. Therefore, the rotary drum 15 can be intermittently rotated by a predetermined angle by repeating the reciprocating operation of the air cylinder 19.

[0020]

As described above in detail with reference to the embodiments, according to the drum rotary feeder of the present invention, one drum
A cam wheel that can rotate on the body and a moving groove along the circumferential direction
An insertion groove that is inserted into this movement groove and opens to the outer periphery is formed.
On the other hand, insert the cam roller at the tip of the drive cylinder through the insertion groove.
To enter the moving groove and extend and retract the drive cylinder.
By engaging the cam roller with the cam surface of the moving groove,
Since the cam wheel can be rotated and fed by a predetermined angle ,
Conventionally used friction plates and ratchet mechanisms are not required, so that the structure can be simplified, the cost can be reduced, and the operability and reliability of the device can be reduced because frequent maintenance is unnecessary. Improvement can be achieved.

[Brief description of the drawings]

FIG. 1 is a front view of a drum rotation feeder according to an embodiment of the present invention.

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

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

FIG. 4 is an operation explanatory view of a drum rotation feed device.

FIG. 5 is an operation explanatory view of the drum rotation feed device.

FIG. 6 is a diagram illustrating the operation of the drum rotation feed device.

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

FIG. 8 is a cross-sectional view of a conventional drum rotation feed device.

FIG. 9 is a left side view of the drum rotation feed device.

FIG. 10 is a sectional view taken along line XX of FIG. 8;

FIG. 11 is an operation explanatory view of the drum rotation feed device.

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 gantry 14 rotating shaft 15 rotating drum 17 cam wheel 19 air cylinder 21 cam roller 31 moving groove 32 insertion groove (locking portion) 33, 35 cam surface (cam portion) 34 locking protrusion (locking portion)

Claims (1)

(57) [Claims] 1. A drum rotation feeder for rotating a drum having a rotation axis at a predetermined angle, a cam wheel rotatable integrally with the drum being attached to the rotation shaft,
While forming a moving groove along the circumferential direction on the wheel,
Forming an insertion groove which is inserted into the moving groove and opened to the outer periphery;
On the other hand, insert the cam roller at the tip of the drive cylinder through the insertion groove.
Into the moving groove to extend and retract the drive cylinder.
The cam rollers are opposed to each other by the retreating motion.
By engaging multiple cam surfaces formed on the
A drum rotation feeder, wherein the cam wheel is rotatable by a predetermined angle .