TWI546226B - Winding machine control mechanism - Google Patents

Description

Film feeding control mechanism of film wrapping machine

The invention relates to the technical field of a film wrapping machine for packaging articles, in particular to a film feeding mechanism of a film wrapping machine.

According to the general film wrapping machine (2), as shown in Figures 5 and 6, the film wrapping head (60) and the rotating table (70) are provided, and the film cylinder (61) is placed on the film wrapping head (60). The film (611) is slightly wrapped around the object (80). When the rotating table (70) is rotated, the film (611) is pulled out from the film tube (61) and sequentially wrapped on the object (80). If the object (80) is circular and placed unevenly from the center point of the rotating table (70), or if the object (80) is rectangular, the object (80) is at a different distance from the center point of the rotating table (70). Different tangential accelerations are generated, and the tangential acceleration on the film (611) is different depending on the angle of the object (80) and the sub-roller (94), so that the tension of the film (611) is not uniform, and thus the glue The coating of the film (611) on the object (80) will be uneven. In order to improve the problem of unevenness of the wrapping, a film feeding mechanism (64) is provided on the upper cover (62) of the film wrapping head (60). The membrane mechanism (64) is composed of a motor (641), a film feeding roller (642) and a sub-feeding roller (643), and is coupled with a roller (91) and a sub-roller (94) of the swing arm (90). The swing arm (90) is provided with a retaining edge (92) and a flange (93), and a stop seat (621) and an opening are provided at a position of the upper cover (62) opposite the retaining edge (92). Close (622), a spring (632) hooked to the fixing seat (631) of the side cover (63) is hung on the flange (93).

When the film (611) produces different tensions, the swing arm (90) will be rotated. At this moment, the retaining edge (92) is released from the switch (622) to start the motor (641), and the film feeding mechanism (64) is operated to accelerate. The conveying amount of the film (611) balances the tension, so that the film (611) wrapped on the object (80) is uniform; however, there are still disadvantages in the structure, as shown in Fig. 5, when the object (80) and The angle of the sub-roller wheel (94) is non-constant when rotating, that is, the tension of the object (80) is also non-constant, and the conveying amount of the film (611) is constant due to the constant rotation of the motor (641), and a film is produced. (611) The delivery amount is too low, and finally the coating film (611) is unevenly wrapped on the object (80).

Another example is the wrapping film tensioning device of the film packaging machine of the Republic of China Patent No. M330956, which mainly uses a tensioning device to produce a tensioning film strip to prevent the film tape from sagging, and to increase the tension of the film strip. Tightening devices, although achieving good quality of the wrap packaging, but the increased complexity of the mechanism and increased cost, while adding a tensioning device into the space of the film, will also limit the size of the article, and can not make full use of the film space.

The inventors of the present invention have intensively studied and developed in view of the foregoing problems. Therefore, the main object of the present invention is to provide a film feeding control mechanism for a film wrapping machine, which mainly comprises a swing arm addition control mechanism for rotating the motor to transfer the amount of the film. It varies with the tension of the film.

In order to achieve the foregoing object, the technical means utilized by the present invention is to provide a film feeding control mechanism for a film wrapping machine, comprising a film wrapping head, the filming head is provided with a swing arm, an upper cover and a motor, and the swing arm is provided with a rotating shaft, characterized in that: the upper cover is provided with a control mechanism, the control mechanism is provided with a cam, a proximity switch and a switch, and the cam sleeve is arranged on the rotating shaft of the swing arm to be swung with the position of the cam relative to the cam position The proximity switch and the switch, the proximity switch and the switch are electrically connected to the motor, the swing of the cam is used to release the switch to open the motor, and the distance from the proximity switch is changed to change the rotational speed of the motor.

Therefore, according to the technical means of the present invention, the effects obtainable by the present invention are as follows:

1. The distance between the cam of the control device of the present invention and the proximity switch is changed, so that the motor generates the rotation speed of the corresponding film tension, and then the appropriate film is delivered, so that the film wrapped on the object is evenly symmetrical.

2. The arrangement of the present invention does not protrude any mechanism on the wrapping head, so that it does not affect the size limit of the article, and the structure is simple and inexpensive.

(1) (2) ‧‧‧Wrapper

(10) (60) ‧ ‧ wrap head

(101) (70) ‧ ‧ rotating table

(11) (62) ‧ ‧ upper cover

(111) (621) ‧ ‧ stop block

(12) (63) ‧ ‧ side cover

(121)‧‧‧ Fixed seat

(122) (632) ‧ ‧ spring

(13) (64)‧‧‧ Film feeding mechanism

(131) (641) ‧ ‧ motor

(132) (642)‧‧‧Feed film roller

(133) (643)‧‧‧Asian film feed roller

(14)‧‧‧Axis hole

(15) ‧ ‧ cover

(20) (61) ‧ ‧ film cartridge

(21) (611) ‧ ‧ film

(30) (80) ‧‧‧ Objects

(40) (90) ‧ ‧ swing arm

(41)‧‧‧Bone bone

(411) (93) ‧ ‧ flange

(42)‧‧‧Upper arm

(421) (92) ‧‧ ‧ rim

(422)‧‧‧ shaft

(43) ‧‧‧ lower arm

(44) (91)‧‧‧ Roller

(45) (94) ‧ ‧ ya roller

(50)‧‧‧Control devices

(51) ‧‧‧ cam

(52)‧‧‧ proximity switch

(53) (622) ‧ ‧ switch

Figure 1 is an embodiment of the present film wrapping machine.

Figure 2 is an exploded view of the original wrap head.

Fig. 3 is an embodiment of the normal tension of the present creation control mechanism.

Fig. 4 is an embodiment of the strong tension of the present creation control mechanism.

Figure 5 is a schematic diagram showing the different film tensions produced by the prior art wrapping machine.

Figure 6 is a schematic diagram of the prior art swing arm action.

Referring to Figures 1 and 2, the film wrapping machine (1) is provided with a film coating head (10) and a rotary table (101), and a film cylinder (20) is placed on the film coating head (10), and the film is 21) After the film cartridge (20) is pulled out through the wrapping head (10), the object (30) is sequentially wrapped on the rotating table (101), and the upper cover (11) is disposed on the wrapping head (10). And a side cover (12), the upper cover (11) is provided with a stop seat (111), a film feeding mechanism (13) and a shaft hole (14), and the cover (15) is covered on the upper cover (11), The film feeding mechanism (13) is provided with a motor (131), and is driven by a sprocket and a chain transmission film roller (132) and a sub-feeding roller (133), and a swing arm (40) is provided with an arm bone (41). a flange (411), an upper arm frame (42) and a lower arm frame (43) are provided on the arm bone (41), and a roller (44) is disposed between the upper and lower arms (42) (43) on the upper arm. The frame (42) is provided with a retaining edge (421) and a rotating shaft (422), and the swing arm (40) is placed on the bearing seat (141) and the rotating shaft (422) is disposed through the shaft hole (14), the flange (411) A spring (122) hooked to the fixing seat (121) of the side cover (12) is hung, and a sub-roller wheel (45) is disposed at a different position from the film feeding mechanism (13) and the swing arm (40).

A control device (50) is disposed on the upper cover (11) of the opposite swing arm (40), wherein the cam (51) is sleeved on the rotating shaft (422) of the shaft hole (14), relative to the position of the cam (51) The proximity switch (52) and the switch (53) are arranged at different positions on the upper cover (11), and the proximity switch (52) is electrically connected to the motor (131).

Please refer to Figures 3 and 4 when implementing, when the film (21) is normalized. When the tension is applied, the swing arm (40) does not rotate. When a large tension is applied, the swing arm (40) starts to rotate, and the cam (51) swings due to the swing arm (40), and the swinging instantaneous cam (51) releases the switch (53). ) to open the motor (131), while the cam (51) and the proximity switch (52) begin to produce a distance, the magnitude of this distance will change with the change of the tension of the film (21), and the change is converted by the proximity switch (52) The motor (131) is rotated at a corresponding speed, so that the film feeding mechanism (13) delivers a suitable film (21) according to different tensions, that is, when the film (21) has a large tension, the swing arm (40) swings at a large angle. The distance between the cam (51) and the proximity switch (52) also increases. At this moment, more glue film (21) must be provided to balance the tension, so the motor (131) speed should be increased, and vice versa, the film (21) When the tension is small, the angle of the swing arm (40) is small, the distance between the cam (51) and the proximity switch (52) and the amount of the film (21) are also small, and the motor (131) can be rotated at a slow speed to wrap the object (30). The film (21) on the film is evenly sized.

The above embodiments are merely illustrative of the technology of the present invention and its effects, and are not intended to limit the present invention. Any person skilled in the art can modify and change the above embodiments without departing from the technical spirit and spirit of the present invention. Therefore, the scope of protection of the present invention should be as listed in the patent application scope mentioned later. .

(111) ‧‧‧stops

(122) ‧ ‧ spring

(133)‧‧‧Asian film feed roller

(21) ‧‧‧ film

(40) ‧‧‧ swing arm

(411)‧‧‧Flange

(42)‧‧‧Upper arm

(421)‧‧‧ 缘缘

(422)‧‧‧ shaft

(44)‧‧‧ Roller

(45)‧‧‧Asian roller

(50)‧‧‧Control devices

(51) ‧‧‧ cam

(52)‧‧‧ proximity switch

(53)‧‧‧ switch

Claims (1)

A film feeding control mechanism of a film wrapping machine, comprising a film wrapping head, comprising: a swing arm, an upper cover and a motor, wherein the swing arm is provided with a rotating shaft, wherein the upper cover is provided with a control mechanism, and the control mechanism is provided a cam, a proximity switch and a switch, the cam sleeve being disposed on the rotating shaft of the swing arm to be oscillated therewith, wherein the proximity switch and the switch are disposed at different positions relative to the cam position, the proximity switch and the switch The motor is electrically connected, the swing of the cam is used to release the switch to turn on the motor, and the distance from the proximity switch is varied to change the rotational speed of the motor.