KR200251256Y1 - Strapping machine with a strap tightening adjustment unit - Google Patents

Abstract

The strapping device comprises a device body 3 defining a package strapping space 35, a strap guide passageway 34 and a package support 36 extending in a direction orthogonal to the strap guide passageway 34. The strap 32 is transported into the package strapping space 35. The spring swing arm 391 is pivotally mounted to the device body 3 and is connected to the rotary shaft 39 via a cam unit 390. Rotation of the rotary shaft 39 rotates the swing arm 391 relative to the device body 3. The clamp unit 392 is movably mounted to the swing arm 391, and can move along the strap path in the swing arm 391. The strap-package isolation unit is installed in the device body 3 and has an isolation plate 521 that is movable in a second direction orthogonal to the strap guide passageway 34 between the non-isolated position and the isolation position. In the isolation position, the isolation plate 521 moves toward the strap guide passage 34 and is positioned between the strap 32 and the package 4 disposed on the package support 36.

Description

Strapping machine with a strap tightening adjustment unit

The present invention relates to a device for wrapping a strap around a package (hereinafter referred to as a strapping device), and more particularly to a strapping device having a strap tightening control unit including a strap-package isolation unit.

Referring to FIG. 1, a conventional strapping device includes a device body 1, a strap supply reel 20, a strap transfer unit 17, a rotary shaft unit 122, and a strap tightening adjustment unit. Doing.

As shown, the device body 1 defines a receiving chamber 11 and has a strap guide passage 14 and a package support 16. The package support 16 extends from the strap guide passage 14 in a first direction orthogonal to the strap guide passage 14 and defines a package strapping space 15 with the strap guide passage 14.

The strap supply reel 20 is installed on the outer top of the device body 1 and has a bundle of straps 12. The strap conveying unit 17 is disposed in the receiving chamber 11 of the device body 1, and the strap guide passage from the strap supply reel 20 can be carried out within the package strapping space 15. The strap 12 may be transferred around the support plate 18 (see FIG. 2A) inside the package strapping space 15 via 14.

The rotary shaft unit 122 is installed in the receiving chamber 11 of the device body 1 and is formed together with the cam unit 123.

The strap tightening adjustment unit includes a spring-hung swing arm 124 and an electrically actuated clamp unit 125. The swing arm 124 is pivotally mounted to the device body 1 within the receiving chamber 11 and defines a strap path that allows the strap 12 to extend therethrough, and through the cam unit 123, the axis of rotation. It is connected to the unit 122. Rotation of the rotary shaft unit 122 rotates the swing arm 122 with respect to the device body 1 from a first position adjacent the package strapping space 15 to a second position away from the package strapping space 15. Accordingly, the strap tightening operation can be performed around the package 2 supported on the package support 16. The clamp unit 125 is installed on the swing arm 124 to be movable, and the clamping position at which the strap 12 is clamped by the clamp unit 125 and the release of the strap 12 being released from the clamp unit 125 It can move along the strap path between locations.

2A and 2B, during strap tightening around the package 2, the pulling force of the strap 12 around the edge of the package 2 adjacent to the strap guide passage 14 is affected. The package 2 is thereby inclined outwards and away from the support plate 18. This causes wrinkling to occur on adjacent sides of the package 2, which in turn hurts the appearance of the package 2.

The present invention has been made to overcome the problems of the conventional strapping device as described above, and an object thereof is to provide a strapping device having a strap tightening control unit including a strap-package isolation unit.

1 is a schematic of a conventional strapping device for strapping a package.

FIG. 2A is a partial schematic view showing a relationship between a strap and a package before tightening the strap in a conventional strapping device. FIG.

FIG. 2B is a partial schematic view showing how a strap clamping operation is performed on a package by a conventional strapping device.

3 is a schematic diagram of a strapping device according to a preferred embodiment of the present invention.

4 is a partial schematic diagram of a strap-package isolation unit employed in a preferred embodiment.

5A is a partial cross-sectional view of the preferred embodiment along line 5A-5A of FIG. 3 to show the strap-package isolation unit in an isolation position.

5B is a partial cross-sectional view of the preferred embodiment along line 5A-5A of FIG. 3 to show the strap-package isolation unit in an unisolated position.

FIG. 6A is a partial schematic view of the preferred embodiment showing the strap-package isolation unit of FIG. 4 in an isolation position prior to strap tightening operation. FIG.

FIG. 6B is a partial schematic view of a preferred embodiment showing the strap-package isolation unit of FIG. 4 in an isolation position during strap tightening operation. FIG.

FIG. 6C is a partial schematic view of the preferred embodiment showing the strap-package isolation unit of FIG. 4 in a non-isolated position after strap tightening operation. FIG.

<Explanation of symbols for the main parts of the drawings>

3.Device body 5 .... Strap-package isolation unit

30 ... strap supply reel 32 ... strap

33 ... strap transfer unit 34 ... strap guide passage

35 ... packing wrapper space 36 ... packaging support

390 ... cam unit 391 ... swing arm

392 Clamp Unit 521 Insulating Plate

In order to achieve the above technical problem, the strapping device of the present invention includes a device body, a strap supply reel, a strap transfer unit, a rotating shaft unit, and a strap tightening adjustment unit. The device body defines a receiving chamber and has a strap guide passageway and a package support. The package support extends from the strap guide passageway in a first direction orthogonal to the strap guide passageway and defines a package strapping space having the strap guide passageway and a corner therebetween with a corner adjacent the strap guide passageway. The strap feed reel is mounted on the device body and is adapted to have a bundle of straps. The strap transfer unit is disposed in the receiving chamber of the device body and can transfer the strap from the strap supply reel to the package strapping space via the strap guide passage. The rotary shaft unit is installed in the receiving chamber of the apparatus body and is formed together with the cam unit. The strap tightening adjustment unit includes a spring-loaded swing arm, an electrically actuated clamp unit and a strap-package isolation unit. The swing arm is pivotally mounted to the device body inside the receiving chamber of the device body and defines a strap path that allows the strap to extend therethrough. The swing arm is furthermore connected to the rotary shaft unit via a cam unit. Rotation of the rotary shaft unit rotates the swing arm with respect to the device body from a first position adjacent the package strapping space to a second position away from the package strapping space. This makes it possible to perform a strap tightening operation around the package supported on the package support in the package strapping space adjacent the strap guide passage. The clamp unit is movably mounted on the swing arm and can move along the strap path between the clamping position where the strap is clamped by the clamp unit and the release position where the strap is released from the clamp unit. The strap-package isolation unit is installed in the device body and has an isolation plate that is movable in a second direction orthogonal to the strap guide passage and the package support between the isolation and non-isolated positions. In the isolated position, the isolation plate is moved between the strap and the package adjacent to the corner so that when the strap tightening operation is performed, the isolation plate moves toward the strap guide passage so that the package can be removed from the strap in a position adjacent to the corner. In the non-isolated position, the isolation plate is released from the strap guide passage to prevent the isolation plate from being sandwiched between the package and the strap and interfering.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. This will make the features and advantages of the present invention more apparent.

3 and 4, a preferred embodiment of the strapping device according to the present invention is the device body 3, strap supply reel 30, strap transfer unit 33, rotary shaft unit 39 and strap tightening adjustment unit (37).

As shown, the device body 3 defines a receiving chamber 31 and has a strap guide passage 34. The package support 36 extends from the strap guide passageway 34 in a first direction orthogonal to the strap guide passageway 34, adjacent the strap guide passageway 34 with the strap guide passageway 34 therebetween. It defines a package strapping space 35 with located corners P (see FIG. 3).

The strap supply reel 30 is installed above the device body 3 and has a bundle of straps 32.

The strap conveying unit 33 is arranged in the receiving chamber 31 of the device body 3 and from the strap supply reel 30 to the support plate 38 in the package strapping space 35 via the strap guide passage 34. The strap 32 can be transported around. As a result, a package strapping operation may be performed in the package strapping space 35.

The rotary shaft unit 39 is installed in the receiving chamber 31 of the apparatus body 3 and is formed together with the cam unit 390.

The strap tightening adjustment unit 37 is pivotally mounted to the device body 3 inside the receiving chamber 31 and includes a swing arm 391 on which the spring is hung. The swing arm 391 defines a strap path (not shown) that allows the strap 32 to extend therethrough and is connected to the rotary shaft unit 391 via a cam unit 390. Rotation of the rotary shaft unit 39 rotates the swing arm 391 relative to the device body 3 from a first position adjacent the package strapping space 35 to a second position away from the package strapping space 35. This allows the strap 32 to be tightened around the package 4 supported on the package support 36 in the package strapping space 35 adjacent to the strap guide passage 34.

The clamp unit 392 is movably mounted to the swing arm 391, the clamping position at which the strap 32 is clamped by the clamp unit 392, and the strap 32 is released from the clamp unit 392 The positions can move along the strap path of the swing arm 391.

The strap-package isolation unit 5 is installed in the device body 3 and is movable in a second direction perpendicular to the strap guide passage 34 and the package support 36 between the isolation and non-isolated positions. It has a plate 521. In the isolated position, as shown in FIGS. 5A and 6A, the isolation plate 521 moves toward the strap guide passage 34 and is positioned between the strap 32 and the package 4 adjacent the corner P. FIG. . In this state, as shown in FIG. 6B, the corner portion P when performing the strap tightening operation by the movement of the swing arm 391 from the first position to the second position simultaneously with the rotation of the rotary shaft unit 39. The package 4 is removed from the strap 32 at a position adjacent to it. After the tightening operation, a cutting device (not shown) cuts the strap 32 in the package 4 so that the package 4 can be removed from the package strapping space 35. Since the cutting device employed here is not related to the present invention, its detailed description is omitted.

The isolation plate 521 may further move in a second orthogonal direction from the isolation position to the non-isolated position. In the non-isolated position, as shown in FIGS. 5B and 6C, the isolation plate 521 is interposed between the package 4 and the strap 32 to prevent interference with the isolation plate 521. 34)

As shown in FIG. 4, the strap-package isolation unit 5 preferably has a fixed mount 51, a movable block 52, a drive unit 53 with a cam mechanism 541 and a coupling link 54. It includes. The fixed mount 51 is firmly installed on the device body 3 (see FIG. 3). The movable block 52 is movably installed on the fixed mounting plate 51 via the roller unit 52 and is connected to the isolation plate 521. The engagement link 54 operatively connects the movable block 52 to the drive unit 53 via the cam mechanism 541 so that the isolation plate 521 can move between the isolation position and the non-isolated position.

In this preferred embodiment, the mounting table 51 is provided with a known control device 55. The control device 55 includes a sensing tab 551 slidably disposed on the cam surface of the cam mechanism 541 and controls the movement of the isolation plate 521 between the isolation position and the non-isolation position. Is electrically connected to the drive unit 53.

Advantages of using the strapping device of the present invention are as follows.

First, the isolation plate 521 extending into the package strapping space 35 reduces the tightening force applied to the package 4 at a position adjacent to the corner P described above during the strap tightening operation. As a result, the package 4 is prevented from tilting away from the support plate 38, so that the strap 32 can be wound around the package 4 with uniform tightening strength.

Secondly, since most of the tightening force during the tightening operation is concentrated on the isolation plate 521, wrinkles do not occur along the edges of the package 4 adjacent to the above-described corner P.

Claims (2)

Defines a receiving chamber 31, extends from a strap guide passage 34 in a first direction orthogonal to the strap guide passage 34 from the strap guide passage 34 and with the strap guide passage 34; An apparatus body (3) having a package support (36) together defining a package strapping space (35) having a corner (P) adjacent the strap guide passageway (34) therebetween; A strap feed reel 30 installed on the device body 3 and adapted to have a bundle of straps 32; A strap conveying unit is disposed in the receiving chamber 31 of the device body 3 and from the strap supply reel 30 to the package strapping space 35 via the strap guide passage 34. Strap transfer unit 33 that can transfer the; A rotating shaft unit (39) installed in the receiving chamber (31) of the apparatus body (3) and formed together with a cam unit (390); And It is pivotally mounted to the device body 3 inside the receiving chamber 31, and defines a strap path for allowing the strap 32 to extend therethrough, and through the cam unit 390 to the rotary shaft unit ( 39 is rotated from the first position adjacent the package strapping space 35 to the second position away from the package strapping space with respect to the device body 3 by the rotation of the rotary shaft unit 39. Swing arm with a spring to tighten the strap 32 around the package 4 supported on the package support 36 in the package strapping space 35 adjacent to the strap guide passage 34. (391), It is movably mounted to the swing arm 391, between a clamping position where the strap 32 is clamped by the clamp unit 392 and an unlocking position where the strap 32 is released from the clamp unit 392. An electrically actuated clamp unit 392 capable of moving along the strap path, Installed in the device body 3 and having an isolation plate 521 which is movable in a second direction orthogonal to the strap guide passage 34 and the package support 36 between the isolation and non-isolated positions; In the isolation position, the isolation plate 521 allows the strap guide passage 34 to be isolated from the strap 32 in a position adjacent to the corner portion P when the strap tightening operation is performed. And move between the strap 32 and the package 4 adjacent to the corner P. In the non-isolated position, the isolation plate 521 is sandwiched between the package 4 and the strap 32. A strap tightening adjustment unit (37) comprising a strap-package isolation unit (5) in which the isolation plate (521) is separated from the strap guide passageway (34) to prevent interference The strapping device, characterized in that the. The method of claim 1, wherein the strap-package isolation unit, A fixed mount 51 installed on the device body 3; A movable block (52) movably mounted to the fixed mount (51) and connected to the isolation plate (521); A drive unit 53 having a cam mechanism 541; And A coupling link 54 operatively connecting the movable block 52 to the drive unit 53 via the cam mechanism 541 so that the isolation plate 521 can move between the isolation position and the non-isolated position. Strapping device characterized in that it further comprises.