CN201573798U - A feeding and unwinding belt and a tightening device of a strapping machine - Google Patents

Abstract

The utility model relates to a feeding and unwinding belt and a tightening device of a strapping machine, which comprises a speed reduction box. With a driven wheel, the lower part of the tightening driving wheel is engaged with the tightening driven wheel. The front end of the tightening driven wheel is provided with a tightening crossbar, and a tightening cam is connected to the bottom of the tightening crossbar. The left side of the tightening cam is provided with a There is a feed-back belt cam, and the upper part of the feed-back belt cam is connected with a feed-back belt crossbar, and the other end of the feed-back belt crossbar is connected to the feed-back belt connecting rod through a connecting bolt, and the feed-back belt connecting rod is connected to the feed-back belt connecting rod through a bolt. Withdraw the driven wheel connection. The beneficial effect of the utility model is: the driven wheel of the feeding and unwinding pulley and the tightening wheel is driven by the cam link structure to change the relative positional relationship with the driving wheel, so in each action process, it will not interfere with each other and can be adjusted conveniently The driving force between each wheel set is suitable for the use of strapping belts of various thicknesses.

Description

A feeding and unwinding belt and a tightening device of a strapping machine

technical field

The utility model relates to a feeding and unwinding belt and a tightening device of a strapping machine.

Background technique

The structure of the strapping machine includes a frame, a feeding and unwinding belt, a tightening device, a thermal fusion and a cutting mechanism, and a set of cams driven by a motor to control the movement of each component. Drive the feeding belt, and after the packing belt wraps around the object to be packed for a week, trigger the start switch, return the excess packing tape, and carry out the tightening operation. The tightening force can be preset by the tightening mechanism. After tightening, cut off The mechanism cuts the packing belt, and the fusion mechanism pressurizes and heats the joint of the packing belt, and one packing operation is completed.

In the prior art, the belt feeding and unwinding device is usually realized by two pairs of rollers, the packing belt passes through the gap between the two pairs of rollers, and the upper rollers for feeding and unwinding the belt are installed on the connecting rod with a fulcrum in the middle , forming a structure similar to a seesaw. There are two sets of gear sets with different transmission directions or a set of gear sets and a set of pulleys to drive the belt feeding and unwinding rollers. When belting, the electromagnet will make the upper belt roller press down, and work together with the lower belt roller to clamp the packing belt to realize the belt feeding action. After the belt feeding is completed, the cam structure will drive the connecting rod to swing, and the belt will be withdrawn from the upper roller. Press and clamp the packing belt for unwinding action. When the tape is withdrawn to the end, the unwinding roller pulls the packing belt tightly to tighten it. The tightening force is adjusted by the adjusting nut of the friction transmission device until the sliding plate slips. , the tightening action is completed, this structure can realize the feeding, unwinding and tightening actions of the strapping belt, but due to the limitation of the installation space, the range of movement of the rollers caused by the swing of the connecting rod cannot be too large, so the upper and lower rollers The gap is not easy to adjust and can only be applied to thicker packing belts. In recent years, according to the effect of actual use, from the perspective of saving costs and resources, relatively thin and narrow packing belts have become more and more common. It is difficult to provide sufficient tightening force with the above-mentioned structure. At the same time, after the above-mentioned roller gap is adjusted After a period of use, the gap will change and need to be readjusted.

Utility model content

The purpose of this utility model is to provide a feeding and unwinding belt and a tightening device of a strapping machine. Through the improvement of the mechanism, the feeding and unwinding force and the tightening force can be adjusted conveniently, and various thicknesses of strapping belts can be used.

The purpose of this utility model is to realize through the following technical solutions:

A feeding and unwinding belt and a tightening device of a strapping machine, including a reduction box, the front end of the reduction box is provided with a feeding and unwinding belt driving wheel and a tightening driving wheel, and the upper part of the feeding and unwinding belt driving wheel engages with the feeding and unwinding belt driven wheel, The lower part of the tightening driving wheel is engaged with the tightening driven wheel, and there is a PP belt channel interspersed between the tightening driving wheel and the tightening driven wheel, and between the feeding and unwinding belt driving wheel and the sending and unwinding belt driven wheel. The front end is provided with a tightening crossbar, and the right end of the tightening crossbar is connected with a column for fixing the compression spring through bolts. One side of the column is provided with a tightening crossbar, and the lower part of the tightening crossbar is connected with a tightening cam. The left side of the tightening cam is provided with a feed-back belt cam, and the upper part of the feed-back belt cam is connected with a feed-back belt crossbar. One end of the send-back belt crossbar is provided with a spring, and the other end of the send-back belt crossbar is connected to the belt through a connecting bolt. The feeding and unwinding belt connecting rod is connected, and the feeding and unwinding belt connecting rod is connected with the said feeding and unwinding belt driven wheel through bolts.

The beneficial effects of the utility model are: the action of sending and unwinding the tape is completed by a set of wheels, and the tightening action is realized by a set of wheels. The driven wheel of the unwinding wheel and the tightening wheel is driven by the cam link structure to change the relative positional relationship with the driving wheel, so in each action process, it will not interfere with each other, and the driving force between the wheel groups can be adjusted conveniently. It is suitable for the use of strapping straps of various thicknesses.

Description of drawings

Below according to accompanying drawing, the utility model is described in further detail.

Fig. 1 is a structural schematic diagram of a feeding and unwinding belt and a tightening device of a strapping machine described in an embodiment of the present invention;

Fig. 2 is a schematic diagram of the external structure of the sending and unwinding belt and the tightening device of a strapping machine described in the embodiment of the present invention;

Fig. 3 is a schematic diagram of the external structure of the feeding and unwinding belt and the tightening device of a strapping machine described in the embodiment of the present invention.

In the picture:

1. Reduction box; 2. Sending and retreating belt driving wheel; 3. Tightening driving wheel; 4. Sending and returning belt driven wheel; 5. Tightening driven wheel; 6. PP belt channel; 7. Tightening arm; 8. Bundling Tight compression spring; 9, column; 10, tightening crossbar; 11, tightening cam; 12, sending and retreating belt cam; 13, sending and retreating belt cross bar; 14, spring; 15, connecting bolt; 16, sending and returning belt Connecting rod.

Detailed ways

As shown in Figures 1-3, the feeding and unwinding belt and the tightening device of a strapping machine described in the embodiment of the utility model include a reduction box 1, and the front end of the reduction box 1 is provided with a feeding and unwinding belt driving wheel 2 and Tighten the driving wheel 3, the upper part of the sending and retreating belt driving wheel 2 is engaged with the sending and retreating belt driven wheel 4, the bottom of the binding driving wheel 3 is engaged with the tightening driven wheel 5, and between the tightening driving wheel 3 and the tightening driven wheel 5, A PP belt channel 6 is interspersed between the sending and returning belt driving wheel 2 and the sending and returning belt driven wheel 4. The front end of the said binding driven wheel 5 is provided with a binding arm 7, and the right end of the binding arm 7 is connected by a bolt for fixing. Tighten the column 9 of the compression spring 8, one side of the column 9 is provided with a tightening crossbar 10, the bottom of the tightening crossbar 10 is connected with a tightening cam 11, and the left side of the tightening cam 11 is provided with a send-back belt cam 12 , the upper part of sending back belt cam 12 is connected with sending back belt cross bar 13, and one end of sending back belt cross bar 13 is provided with spring 14, and the other end of sending back belt cross bar 13 is connected with sending back belt connecting rod 16 through connecting bolt 15. Connected, sending back the belt connecting rod 16 is connected with the said sending back belt driven wheel 4 by bolts.

When in actual use, the utility model is at the zero position at the beginning, the cam 12 of the feeding and unwinding belt is the low point, and the driving wheel 2 of the feeding and unwinding belt and the driven wheel 4 of the feeding and unwinding belt are in the meshing state. , the size of the pulling force of the spring 14 determines the size of the belt force, the tightening cam 11 is at a low point, and the tightening driven wheel 5 and the tightening driving wheel 3 are separated by the tightening arm 7; When unwinding, the state between the feeding and unwinding pulley and the tightening wheel remains unchanged. After the unwinding is completed, the tightening cam 11 is at a high point in the tightening position, and the tightening arm 7 is driven by the tightening cross bar 10 to bind The tightening arm 7 keeps the binding driven wheel 5 and the binding driving wheel 3 in the meshing state, and at the same time changes the tightening force of the machine by changing the compression amount of the binding compression spring 8. Cross bar 13, connecting bolt 15, sending back belt connecting rod 16 and sending back belt pulley eccentric shaft will send back belt driven wheel 4 and send back belt driving wheel 2 to separate; The tightening driven wheel 5 and the tightening driving wheel 3 are separated by the tightening arm 7 .

Claims (1)

1. the send-back of a banding machine and binding device, comprise drop-gear box (1), it is characterized in that: the front end of described drop-gear box (1) is provided with send-back driving wheel (2) and binds driving wheel (3), the top engagement send-back flower wheel (4) of send-back driving wheel (2), the bottom engagement that binds driving wheel (3) binds flower wheel (5), bind between driving wheel (3) and the encircling flower wheel (5), be interspersed with PP tape channel (6) between send-back driving wheel (2) and the send-back flower wheel (4), the front end of described encircling flower wheel (5) is provided with and binds arm (7), the right-hand member that binds arm (7) is useful on the fixing column (9) that binds compression spring (8) by bolted connection, one side of column (9) is provided with and binds cross bar (10), the below that binds cross bar (10) is connected with and binds cam (11), the left side that binds cam (11) is provided with send-back cam (12), the top of send-back cam (12) is connected with send-back cross bar (13), one end of send-back cross bar (13) is provided with spring (14), the other end of send-back cross bar (13) is connected with send-back pipe link (16) by tie bolt (15), and send-back pipe link (16) is connected with described send-back flower wheel (4) by bolt.

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