KR200251252Y1 - Strapping machine with a strap tightening adjustment unit - Google Patents

Abstract

The packaging machine includes a machine body 7 with a package packaging space 71. The strap 8 is conveyed to the package packaging space 71. The spring loaded swing arm 91 is pivoted on the machine body 7 and the cam unit 723 is rotated such that the rotation of the shaft 722 causes the swing arm 91 to rotate relative to the machine body 7. Through a rotating shaft 722. The electrically actuated clamp unit 95 is rotatably mounted to the swing arm 91 and is movable relative to the strap passage in the swing arm. The delay circuit 104 is electrically connected to the sensing device 100 and the clamp unit 95. When the sensing device 100 senses the first position of the swing arm 91, the delay circuit 104 drives the clamp unit 95 to move from the clamping position to the clamping position after a predetermined delay time. When the sensing device 100 detects the second position of the swing arm 91, the clamp unit 95 is immediately driven to move from the clamping position to the unlocking position.

Description

PACKAGING MACHINE WITH STRAP TENSION ADJUSTING UNITS {STRAPPING MACHINE WITH A STRAP TIGHTENING ADJUSTMENT UNIT}

The present invention relates to a packaging machine, and more particularly to a packaging machine with a strap tensioning unit of a simple structure.

The conventional packaging machine of FIGS. 1 to 3 includes a machine body 1, a strap supply reel 14, a strap transfer unit 13, a rotary shaft unit 122, and a strap tension adjustment unit 4.

As shown, the machine body 1 forms a receiving space 11 and a package packaging space 12 above the receiving space 11. The strap supply reel 14 is attached to the outside of the machine body 1. A bundle of straps 2 is mounted on a strap feed reel 14, the tip of which is packaged space 12 by means of a strap conveying unit 13 in such a way that packaging work is carried out in the package packing space 12. Are transported into. The rotary shaft unit 122 is journaled in the accommodation space 11 of the machine main body 1, and the cam unit 123 is formed.

The strap tension adjusting unit 4 includes a spring loaded swing arm 41, a clamp unit 5 and a strap tension adjuster 6. The mounting shaft 113 extends through the mounting bracket 111 of the machine main body 1 and the swing arm 41, and pivotally mounts the swing arm 41 in the accommodating space 11 inside. The rotation of the rotary shaft unit 122 consequently occurs relative to the machine body 1 along the travel path 131 between the upper position adjacent the package packaging space 12 and the lower position distal from the package packaging space 12. The swing arm 41 is also associated with the rotary shaft unit 122 via the cam unit 123 in such a way that the swing arm 41 is pivoted. The swing arm 41 forms a strap passage 414 allowing the extension of the strap 2 and a rod path 415 in spatial communication with the strap passage 414. The clamp unit 5 includes a clamp piece 54, a push rod 51, and a torsion spring 52. The clamp piece 54 is pivotally mounted to the swing arm 41 via the pivot 53. The push rod 51 is movably disposed in the rod path 415 of the swing arm 41 and operates in conjunction with the clamp piece 54. The torsion spring 52 pivots so that the push rod 51 in the rod path 415 faces the first direction away from the strap passage 414 to release the clamping of the clamp piece 54 relative to the strap 2. 53) sleeved around. The strap tension adjuster 6 is rotatably mounted in the mounting bracket 111 of the accommodation space 11 and extends in parallel with and adjacent to the mounting shaft 113, a sleeve on the mounting shaft 113, the adjuster shaft 61. And a spring loaded rod pusher for moving the push rod 51 in a second direction opposite to the first direction to produce a result of the clamping of the clamp piece 54 with respect to the strap 2 in the strap passage 414. 64, and a tension adjusting wheel 62 eccentrically fixed to the adjuster shaft 61 and in sliding contact with the rod pusher 64 via the coupler unit 63.

When the swing arm 41 is pivoted in the position between the upper and lower positions by the rotation of the shaft unit 122, the rod pusher 64 and the coupler unit 63 rotate simultaneously with the swing arm 41. A collision with the adjacent wheel 62 of the protrusion 631 on the coupler unit 63 consequently stops the rotation of the coupler unit 63 on the shaft 113 and then the strap passage 414 of the swing arm 41. This results in the movement of the clamp piece 54 in the second direction towards, thereby clamping and tensioning the strap 2 around the package disposed in the package packaging space 12 of the machine body 1.

It is noted that the strap tension adjusting unit 4 of the conventional packaging machine comprises a relatively large number of components, and as a result, the structure is complicated and a large assembly time is required to manufacture the conventional packaging machine.

It is therefore an object of the present invention to provide a packaging machine with a strap tensioning unit of simple construction in order to overcome the aforementioned disadvantages associated with conventional packaging machines.

1 is a schematic diagram of a conventional packaging machine for packaging a package;

2 is a partially exploded perspective view of a strap tensioning unit of a conventional packaging machine;

3 is a partially assembled perspective view of a conventional packaging machine showing the mounting principle of the strap tensioning unit to the machine body;

4 is a partial schematic view of a conventional packaging machine, showing the principle of operation of the strap tensioning unit;

5 is a schematic view of a preferred embodiment of a packaging machine according to the present invention;

6 is a partial schematic view of a preferred embodiment, showing the mounting principle of the swing arm of the strap tension adjustment unit to the machine body;

7 is an exploded schematic view of a preferred embodiment, showing the driving principle of a swing arm of a strap tensioning unit for moving to a first position;

FIG. 8 is a schematic diagram of a preferred embodiment, showing the principle of operation in VIII-VIII of FIG. 7 of the first micro switch by a first actuator fixedly mounted to the rotary shaft; FIG.

9 shows a clamp unit of the preferred embodiment, in the clamping position;

10 is a partial schematic view of a preferred embodiment, showing the driving principle of a swing arm of a strap tensioning unit for tensioning a strap relative to a package;

FIG. 11 is a driving principle diagram of a second micro switch by a second drive device in a preferred embodiment; FIG.

12 is an exploded schematic view of the preferred embodiment, showing the principle of return of the swing arm of the strap tension adjustment unit to the first position;

Fig. 13 is a driving principle diagram of a third micro switch by the third drive device in the preferred embodiment;

Therefore, the packaging machine of the present invention includes a machine body, a strap feeding reel, a strap conveying unit, a rotating shaft unit, and a strap tension adjusting unit. The machine body forms a receiving space and a package packaging space above the receiving space. The strap feed reel is mounted to the machine body and holds the strap bundle thereon. The strap transfer unit can transfer the strap from the strap feed reel to the package packaging space of the machine body. The rotary shaft unit is journaled in the accommodation space of the machine body, and a cam unit is formed. The strap tensioning unit includes a spring loaded swing arm, an electrically actuated clamp unit, a sensing device, and a delay circuit. The swing arm is pivoted on the machine body inside the receiving space and the rotation of the shaft unit results in the swing arm pivoting about the machine body between the upper position adjacent the package packaging space and the lower position at the distal end from the package packaging space. It is connected to the rotary shaft unit through the cam unit. The swing arm defines a strap passage intended to allow extension of the strap. The clamp unit is rotatably mounted to the swing arm and is movable relative to the strap passage between the clamping position where the strap is clamped by the clamp unit and the clamping release position where the strap is unclamped from the clamp unit. The delay circuit is electrically connected to the sensing device and the clamp unit. When the sensing device senses the first position of the swing arm between the upper and lower positions, the delay circuit drives the clamp unit to move from the unlocked position to the clamping position after a predetermined delay time. When the sensing device senses the second position of the swing arm between the first position and the lower position, the clamp unit is immediately driven to move from the clamping position to the unlocking position.

Other features and advantages of the present invention will become apparent from the following description of the preferred embodiments of the present invention with reference to the drawings.

(Example)

5, 6 and 7 show a preferred embodiment of a packaging machine according to the present invention for packaging a package 90, the machine body 7, strap feed reel 60, strap transfer unit 73, rotary shaft unit. 722, and strap tension adjusting unit 9.

As shown, the machine body 7 forms an accommodating space 70 and a package packaging space 71 above the accommodating space 70. The package 90 is to be placed in the package packaging space 71 of the machine body 7 for packaging.

The strap feed reel 60 is mounted to the machine body 7 to hold the strap 8 bundle thereon.

The strap conveying unit 73 is arranged in the receiving space 70 of the machine body 7, and after surrounding the package 90, the distal end of the strap 8 is lowered to the support plate supporting the package 90. The strap 8 can be transferred from the strap supply reel 60 to the package packaging space 71 in a fixed manner.

The rotary shaft unit 722 is journaled between two mounting walls (only one is shown in FIGS. 6 and 7) in the receiving space 70 of the machine body 7, and a cam unit 723 is formed have.

The strap tension adjusting unit 9 includes a spring loaded swing arm 91, an electrically actuated clamp unit 95, a sensing device 100, and a delay circuit 104. The lower portion 911 of the swing arm 91 is pivoted on the pivot seat 711 inside the receiving space 70 of the machine body 7, as shown in FIG. 5, as shown in FIG. 5. Similarly, with respect to the seat 711 between the upper position adjacent to the package packaging space 71 and the lower position of the distal end from the package packaging space 71, the cam unit 723 in a manner that the swing arm 91 is pivoted as a result. Is associated with the rotary shaft unit 722. The swing arm 91 has an upper portion 912 in which a strap passage 916 (see FIG. 9) is formed so that the strap 8 is packaged with the package body 71 of the machine body 7 from the strap supply reel 60. In case of being conveyed by the strap conveying unit 73, the extension of the strap 8 through it is allowed. The clamp unit 95 is rotatably mounted to the swing arm 91, the clamping position at which the strap 8 is clamped by the clamp unit 95, and the strap 8 being unclamped from the clamp unit 95. It is rotatable relative to the strap passageway 916 between the clamping release positions.

The delay circuit 104 may be configured such that when the sensing device 100 senses the first position of the swing arm 91 between the upper and lower positions, as well illustrated in FIG. 7, the delay circuit 104 clamps. The unit 95 is electrically connected to the sensing device 100 and the clamp unit 95 in such a way as to move the clamping position from the clamping position to the clamping position after a predetermined delay time. Under these conditions, the strap 8 around the package 90 is tensioned by the rotation of the shaft unit 722 and at the same time the movement of the upper portion 912 of the swing arm 91 from the upper position to the lower position. When the sensing device 100 detects the second position of the swing arm 91 between the first position and the lower position (see FIGS. 10 and 11), the clamp unit 95 is immediately driven to release the clamping position from the clamping position. And the clamp 8 is then de-clamped from the clamp unit 95.

The sensing device 100 is arranged in the receiving space 70 of the machine body 7 adjacent the rotary shaft unit 722 and is electrically connected to the delay circuit 104 first and second micro switches 101, 102. 8 and 11, when the swing arm 91 is in the first and second positions, as shown in FIGS. 8 and 11, respectively, with the first and second micro switches 101 and 102, respectively. It includes first and second actuators 724,725 that can be contacted. The drive unit 72 is provided for rotating the rotary shaft unit 722. The sensing device 100 is located in the receiving space 70 of the machine body 7 adjacent the rotary shaft unit 722 and is electrically connected to the drive unit 72, the third micro switch 103, the rotary shaft. 12 and 13, when the swing arm 91 is in the lower position to control the drive unit 72 to stop the rotation of the shaft unit 722, as shown in FIGS. 12 and 13. Also included is a third actuator 726 that may be in contact with the three microswitch 103. Under these conditions, swing arm 91 is brought back to the initial position in FIG. 12 by the tension of spring 914 interconnecting mounting wall 712 and swing arm 91.

In this preferred embodiment, the delay circuit 104 includes the motor 97 to move the clamp unit 95 from the clamping position to the clamping position when the first actuator 724 contacts the first micro switch 101. Includes a motor 96 operably connected to the clamp unit 95 via the pivot plate 96 and the push rod 92 (see FIG. 9) in a rotational manner in the first direction. In the same way, when the second actuator 725 is in contact with the second micro-switch 102, the motor 97 is moved in the opposite direction to the first direction to move the clamp unit 95 from the clamping position to the unlocking position. It will rotate in two directions.

Referring to FIG. 9, the clamp unit 95 is fixed to the upper portion 912 of the swing arm 91 (see FIG. 6) and is disposed on the strap passage 916 and the upper portion of the strap passage 916 and therein the push rod 92. U-shaped clamp sheet 913 to form a push rod path 917 to receive the clamp piece 950 pivoted to the sheet 913 through the pivot 93, and sleeves around the pivot 93 And the pressing member 94 for pressing the clamp piece 950 through the push rod 92 to clamp the strap 8 to the strap passage 916 of the seat 913 when the motor 97 rotates in the first direction. It is preferable to include).

The strap tension adjusting unit 4 of a conventional packaging machine includes a relatively large number of components, and as a result, the structure is complicated and a large assembly time is required to manufacture a conventional packaging machine. It is possible to provide a packaging machine with a structured strap tensioning unit.

Claims (4)

A machine body (7) forming an accommodation space (70) and a package packaging space (71) above the accommodation space (70); A strap supply reel (60) mounted to the machine body (7) and holding a bundle of straps (8) thereon; A strap transfer unit (73) capable of transferring the strap (8) from the strap supply reel (60) to the package packaging space (71); A rotary shaft unit 722 which is journaled in the accommodation space 70 and in which a cam unit 723 is formed; And The strap tension adjusting unit (9), The strap tensioning unit 9 is pivoted to the machine body 1 within the accommodation space 70 and rotation of the shaft unit 722 results in an upper position adjacent to the package packing space 71. The swing arm 91 is associated with the rotary shaft unit 722 in a manner such that the swing arm 91 is pivoted with respect to the machine body 1 between the package packing space 71 and the lower end of the distal end. 91 is a spring loaded swing arm 91 that forms a strap passageway 916 to allow expansion of the strap 8 therethrough, Clamping position rotatably mounted to the swing arm 91, the clamping position where the strap 8 is clamped by the clamp unit 95 and the clamping release position where the strap 8 is clamped from the clamping unit 95 Electrically actuated clamp unit 95 rotatable relative to the strap passageway 916 between, Sensing device 100 and A delay circuit 104 electrically connected to the sensing device 100 and the clamp unit 95, The delay circuit 104 drives the clamp unit 95 after a predetermined delay time when the sensing device 100 detects a first position of the swing arm 91 between the upper and lower positions. When the clamping unit 95 moves from the clamping release position to the clamping position, and the sensing device 100 detects the second position of the swing arm 91 between the first position and the lower position, A packaging machine for packaging a package, which is immediately driven to move from the clamping position to the clamping release position. 2. The sensing device (100) according to claim 1, wherein the sensing device (100) is arranged in the accommodation space (70) of the machine body (7) adjacent the rotary shaft unit (722) and electrically connected to the delay circuit (104). First and second microswitches 101 and 102, and the first and second micro switches 101 and 102, which are fixed to the rotary shaft unit 722 and when the swing arm 91 is in the first and second positions. Packaging machine comprising first and second actuators (724,725) capable of contacting each other. 3. The machine body (1) according to claim 2, further comprising a drive unit (72) for rotating the rotary shaft unit (722), wherein the sensing device (100) is adjacent to the rotary shaft unit (722). A third micro switch 103 disposed in the accommodation space 70 of the housing and electrically connected to the drive unit 72, and fixed to the rotary shaft unit 722, And a third actuator 726 capable of contacting with the third micro switch 103 when the swing arm 91 is in the lower position to control and stop rotation of the rotary shaft unit 722. Packaging machine, characterized in that. 3. The delay circuit (104) of claim 2, wherein the delay circuit (104) includes a motor (96) operably connected to the clamp unit (95), wherein the motor (96) is provided with the first actuator (724). When in contact with the first micro switch 101, the clamp unit 95 is rotated in the first direction to move the clamp unit 95 from the clamping release position to the clamping position, and the second actuator 725 moves to the second micro switch ( 102, the packaging machine rotating in a second direction opposite to the first direction to move the clamp unit (95) from the clamping position to the clamping release position.