JPH0542002Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) This invention relates to a drive device that uses a unidirectional rotating motor to rotate each lifting rod cam shaft of a band packing machine in one direction, and to drive a feed roller shaft in forward and reverse directions.

(Prior Art) In a packaging machine, each lifting rod for pressing or cutting the band must be located directly below the sealer table, and the feed roller must be disposed near the sealer table.

Furthermore, the motors that drive these were usually installed below the lifting rod case.

Conventionally, due to such an arrangement design, in semi-automatic packaging machines, the shape of the packaging machine main body was large compared to the size of the objects to be packed, resulting in poor space efficiency.

(Purpose) The present invention provides a device that can make the space within the main body, particularly the drive device and transmission mechanism that occupy the space within the main body of a small packaging machine, compact.

(Structure) In the present device, a unidirectional rotating motor is fixed to the outer wall of a case that holds the lifting rods, and one shaft end of a camshaft for driving each lifting rod at a predetermined timing is connected to the motor. A worm gear is fixedly protruded from the opposite side wall, and a worm input shaft with a worm that meshes with the water gear is attached to the worm input shaft, and an electromagnetic clutch is attached to the pulley, which tightens and feeds the band. A feed roller pulley provided on the forward/reverse feed roller shaft and connected via an electromagnetic clutch is belted by a belt from the pulley of the motor so as to rotate in the same direction. A counter pulley is disposed below and between the worm pulley so as to be in sliding contact with the outer circumferential surface of the belt, and a second shaft is pivotally connected to the counter pulley via an electromagnetic clutch. A first transmission pulley and a second transmission pulley pivotally attached to the forward/reverse feed roller shaft are connected by a belt so that the reverse driving force of the counter pulley is transmitted to the feed roller.

(Example) 1 is a band guide arch, 2 is a sealer table, 3 is a heater, and 4 is a lifting rod case that holds the lifting rods 5, 6, and 7, and a small motor 20 that rotates in one direction is fixed to the side wall. It is set up.

8 is a cam shaft, and 9, 10, and 11 are cam plates.

12 is a worm gear keyed to the shaft end 8a of the camshaft, 15 is a worm, and 16 is a worm input shaft, which is a driven shaft of an electromagnetic clutch 17. A driven pulley 18 is pivotally attached to the electromagnetic clutch 17.

23 is a feed roller that feeds and tightens the band; 24 is a roller shaft that is connected to an electromagnetic clutch 2;
5 to a coaxial pulley 26 and a second transmission pulley 27.

Belt 19 wrapped around motor pulley 21
is wound around the worm shaft driving driven pulley 18 and the feed roller pulley 26 to rotate them in the same direction.

30 is a counter pulley, 31 is an electromagnetic clutch,
Reference numeral 33 denotes a first transmission pulley, which is rotatably mounted on the rotating shaft 32 of the clutch.

The counter pulley 30 is located directly below the feed roller pulley 26 and is located directly below the camshaft driven pulley 1.
8 and serves as a tension pulley for the belt.

As a result, the counter pulley 30 becomes the pulley 1.
8 and 26 in the opposite direction.

The rotational force of the counter pulley 30 is transmitted to the rotating shaft 32 and the first transmission pulley 33 by excitation of the electromagnetic clutch 31, and rotates the pulley 27 via the counter belt 34.

The electromagnetic clutch 25 is interlock connected with the electromagnetic clutch 31, and when the first transmission pulley 33 is rotating, the electromagnetic clutch 25 is in the OFF state, so the feed roller 23 is driven in the band feeding direction by the rotation of the pulley 27. Ru.

Clutch 31 is turned OFF, and clutch 25 is turned OFF.
When ON, the counter belt 34 does not transmit the rotational force of the counter pulley 30, and therefore the feed roller 23 is rotated by the belt 19 in the band tightening direction.

The clutch 17 on the worm input shaft is connected to the camshaft 8
It turns ON only when the motor rotates.

(Effects) In this device, a small unidirectional rotating motor is fixed to one side wall of the lifting rod holding frame case, and a worm reducer for the camshaft and a feed roller reversing device are installed on the opposite side of the motor to save space. Belt 1, which is passed around a motor pulley, rotates in the tightening direction and drives the worm input shaft.
9, the band is tightened, and the band feeding of the feed roller is performed by the rotational force of the counter roller, which is located in the space below the feed roller and also serves as a tension pulley of the belt 19, so that the packing machine This made it possible to lower the floor and shorten the width, making the entire structure extremely compact.

In the present device, the motor is a unidirectional rotating motor, and since vibration is small, it can be directly fixed to the holding frame case, and is particularly effective when used in a semi-automatic packaging machine.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the main parts of the proposed device, and FIG. 2 is a power transmission system diagram. Description of symbols, 8...Cam shaft, 12...Worm gear, 16...Worm input shaft, 17, 25, 31
...Electromagnetic clutch, 18, 21, 26...Pulley, 20...One-way rotation motor, 23...Forward/reverse feed roller, 30...Counter pulley.

Claims (1)

[Scope of utility model registration request] A one-way rotating motor is fixed to the outer wall of the case, which is housed in a case fixed directly below the sealer table of the packaging machine, and which holds lifting rods for pressing and cutting bands, etc., and also controls each of the lifting rods in a predetermined manner. One shaft end of a camshaft 8 for timing drive is protruded from the side wall opposite to the motor, and a worm gear 12 is fixed thereon, and a worm input shaft is equipped with a worm 15 that meshes with the worm gear. A pulley 18 equipped with an electromagnetic clutch 17 at 16 and mounted on the shaft
An electromagnetic clutch 25 is provided on the forward/reverse feed roller shaft 24 that tightens and feeds the band.
and a feed roller pulley 26 connected via a belt 19 from the pulley 21 of the motor so as to rotate in the same direction.
Below the feed roller pulley 26,
A counter pulley 30 is disposed between the worm pulley 18 and the belt 19 so as to be in sliding contact with the outer peripheral surface of the belt 19. A driving device for a band packing machine, which is configured such that a first transmission pulley 33 and a second transmission pulley 27 rotatably mounted on the forward/reverse feed roller shaft 24 are connected by a belt so that the reverse driving force of the counter pulley is transmitted to the feed roller. .