Fork assembly for sheet metal handling system

Abstract

The present invention relates to a fork assembly for a sheet metal handling system, and more particularly, to a fork assembly for a sheet metal handling system capable of lifting a processed product while a pair of fork support portions of a fixed fork are operated in a width direction, and transporting the lifted product to a loading position.

Description

TECHNICAL FIELD

[0001] The present application relates to a fork assembly for a metal plate loading and unloading system, and more particularly to a fork assembly for a metal plate loading and unloading system in which a pair of fork support portions of a fork are operated in a width direction to lift a processed product, and the lifted product can be transported to a loading position. BACKGROUND

[0002] In the case of laser cutting processing of a plate-shaped metal plate, the plate-shaped metal plate is placed on a table equipped with a slide to perform cutting processing. The laser-cut plate-shaped metal plate is unloaded again, and the processed product and the skeleton are separated. In order to unload the cut plate-shaped metal plate again, a fork assembly is used.

[0003] As for this fork device, US Patent No. 9,156,179 (hereinafter, referred to as "Prior Art 1") and Korean Patent No. 10-2248817 (hereinafter, referred to as "Prior Art 2") are disclosed in the prior art.

[0004] In Prior Art 1, a pair of fork units arranged in a width direction are configured to lift a product. In Prior Art 2, one fork unit is configured to lift a product.

[0005] In Prior Art 1 and Prior Art 2, the tips of a plurality of fork blades constituting the fork unit are configured in a free end state, so that when the product is lifted, the fork blades can be sagged by the load, and in the case of severe sagging, problems such as product falling during product transportation or damage to the fork blades can occur. Prior Art 1 and Prior Art 2 do not limit the degree of shaking when the fork unit is raised, so there is a problem that the lifting of the product is unstable.

[0006]

Prior Art Documents

Patent Documents

[0007] An object of the present application is to provide a fork assembly for a metal plate loading and unloading system in which the protruding tip of the fork can be supported when the tip is moved in a width direction by the lead guide bearing.

[0008] An object of the present application is to provide a fork assembly for a metal plate loading and unloading system in which problems such as twisting that can occur due to the lifting of the main frame or the operation of the fork in the width direction are prevented in advance by the fastening structure of the lifting guide roller and the lifting guide rail.

[0009] An object of the present application is to provide a fork assembly for a metal sheet handling system, in which a torque limiter is provided to a drive shaft, a load applied to a main frame is measured, and in the case where an abnormal load is applied to the fork assembly due to misoperation, power transmitted to the drive shaft can be blocked to enable emergency stop.

[0010] The fork assembly for a metal sheet handling system according to the present application can include a main frame 100 having a quadrangular cross-sectional shape; a plurality of forks 210 arranged at a predetermined interval on both sides of the main frame 100 in a width direction; a pair of fork support portions 200 fixedly coupled to one end portions of the forks 210; a lifting portion 400 provided to both sides of the main frame 100 in a length direction to lift the forks 210 and the fork support portions 200; and a driving portion 500 coupled to one side of the main frame 100 and configured to move the pair of fork support portions 200 in the width direction.

[0011] The fork assembly for a metal sheet handling system according to the present application can be characterized in that one end of the fork 210 is individually assembled and fastened to a lower end of the fork support portion 200 by a bolt or a screw, and a tip end of at least one of the forks toward the main frame 100 is formed in a shape protruding downward and inclined.

[0012] The fork assembly for a metal sheet handling system according to the present application can include lead-out guide frames 300 fixed to both ends of the main frame 100 in the width direction, wherein the lead-out guide frames 300 include lead-out holes 310 arranged at a plurality of intervals to allow the end portions of the forks 210 to be inserted therethrough, and lead-out guide bearings 320 provided to lower portions of the lead-out holes 310 to support lead-out of the forks 210.

[0013] The main frame 100 according to the present application can include a pair of lifting protruding ends 110 protruding outward from both ends in the length direction, and a pair of lifting guide rollers 120 provided to the pair of lifting protruding ends 110 and guided to be lifted by lifting rails 410 of the lifting portion 400.

[0014] The fork assembly for a metal sheet handling system according to the present application can be characterized in that the lifting rails 410 are formed in a shape of a roller rail 410A or a curved plate 410B.

[0015] The lifting guide rollers 120 according to the present application can be characterized in that a rotation axis of at least one of the lifting guide rollers 120 provided to the lifting protruding ends 110 different from each other is different from a direction of a rotation axis of the other lifting guide rollers 120.

[0016] The driving part 500 according to the present application can include driving shafts 510, a pair of which are provided in the main frame 100 in a coaxial state in the length direction, and at least one of the driving shafts 510 is provided with a pinion 511; driving frames 530 including a rack gear 531 engaged with the pinion 511, a pair of the driving frames 530 being movably provided in the main frame 100 in the width direction to move a pair of fork support parts 200 in the width direction; and a torque limiter 520 fastened between a pair of the driving shafts 510 to transmit power to the driving shafts 510 or limit the power according to a measured value of torque measured in the driving shaft 510 or the main frame 100.

[0017] According to the present application, the protruding ends of the forks support the protrusions in the width direction by the lead guide bearing, thereby stabilizing the protrusions and preventing breakage and product drop due to bending and the like.

[0018] The present application has the advantage that the products can be easily placed on the upper portion by the inclined ends of the forks, and the plurality of forks can be individually disassembled, so that maintenance and replacement are easy and simple.

[0019] The present application has the advantage that, by limiting the distortion of the main frame due to the lifting of the main frame or the operation of the port, the transport stability of the products can be improved, and damage and malfunction of the fork assembly can be suppressed.

[0020] The present application has the advantage that, in the case where the torque limiter applies an abnormal load to the fork assembly, the power transmitted to the driving shafts can be blocked, so that the risk of breakage of the fork assembly due to collision between the forks can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a view of a setting example of a fork assembly according to the present application.

[0022] Figure 2 is a perspective view of a fork assembly according to the present application.

[0023] Figure 3a and Figure 3b is a view of a use example of a fork assembly according to the present application, Figure 3a is a view showing a state in which the forks are spread, Figure 3b is a view showing a state in which the forks are gathered.

[0024] Figure 4 is a view showing a fastening structure applied to the forks and the fork support parts of the present application.

[0025] Figure 5 is Figure 3a is a view of an example of a lead guide frame applied to the present application.

[0026] Figure 6 is Figure 1 a plan view.

[0027] Figure 7 is Figure 6 a B region enlarged view, is a diagram showing a fastening structure of a lifting rail and a lifting roller according to the first embodiment.

[0028] Figure 8 is Figure 6 a C region enlarged view, is a diagram showing a fastening structure of a lifting rail and a lifting roller according to the second embodiment.

[0029] Figure 9 is a diagram showing a use example applied to a driving section of the present application.

[0030] Explanation of Reference Numerals 10: fixed frame P: product 100: main frame 200: pair of fork support sections 300: lead-out guide frame 400: lifting section 500: driving section DETAILED DESCRIPTION

[0031] The present application is explained in detail with reference to the drawings. In the present application, as shown in FIG. 1, a length direction L and a width direction W are designated, but these are directions designated only to help understanding of the present application, and the present application is not limited thereto. Figure 1

[0032] The present application is roughly configured to include a main frame 100, a plurality of forks 210, a pair of fork support sections 200, a lifting section 400, and a driving section 500.

[0033] As shown in FIGS. 1 and 2, the main frame 100 is used to support each of the constituent elements of the fork assembly, and as a whole, can be equipped in a quadrangular frame form. Figure 1 Figure 2 The main frame 100 is fastened in a manner to constitute a quadrangle after being arranged in each of the frame transverse and longitudinal directions, and they are firmly fixed to be able to stably support each of the constituent elements of the fork assembly described later.

[0034] The main frame 100 is fastened in a manner to constitute a quadrangle after being arranged in each of the frame transverse and longitudinal directions, and they are firmly fixed to be able to stably support each of the constituent elements of the fork assembly described later.

[0035] The plurality of forks 210 and the pair of fork support sections 200 are used to lift a product P and a skeleton frame cut by laser placed on a slide. The forks 210 are arranged in a plurality at both ends of the width direction of the main frame 100 at a predetermined interval, and the fork support sections 200 fixedly combine one end of each of the forks 210.

[0036] Referring to Figures 3a to 3b ​​To explain, the prongs 210 have a sufficient length to lift the laser-cut product P and the skeleton by being placed on the slide, and a hollow pipe shape of a substantially quadrangular cross section, one end of each is fastened to the prong support 200, so that it can be operated as one unit. Referring to Figure 4 and Figure 5 , the tip of the prong 210 is formed obliquely, with the oblique surface formed facing upward, so that the product P dropped between the saw blades can be easily placed on the upper portion of the prong 210 by the oblique surface.

[0037] Referring to Figure 4 To explain, each prong 210 is assembled separately to be detachably combined. The widthwise end of the prong 210 is separately assembled to the lower end of the prong support 200 by a fastening member such as a bolt or a screw, respectively. In the case of damage to one prong or the need for repair, only the prong can be separated for replacement or repair.

[0038] Referring to Figure 5 To explain, the prong 210 loads or unloads the product P or the skeleton with movement in the widthwise direction of the prong support 200. The metal plate loading and unloading system fork assembly can further include an extraction guide frame 300 fixed to both widthwise ends of the main frame 100 for guiding movement of the prong 210 in the widthwise direction, respectively.

[0039] The extraction guide frame 300 includes extraction holes 310 arranged with a plurality of spaces for the end of each prong 210 to be inserted therethrough, and extraction guide bearings 320 provided at the lower portion of the extraction holes 310 to support extraction of the prong 210. In detail, as shown in Figure 5 , a bent portion 330 formed in a shape bent or folded toward the horizontal or the upper inclined side is provided at the lower end of the extraction guide frame 300, and a predetermined space 331 is formed between the bent portion 330 and the extraction guide frame 300. The extraction guide bearing 320 is rotatably provided in the space 331 to be able to support extraction of the prong 210. The extraction guide bearing 320 is arranged with the upper end located at the upper portion than the lower end of the extraction hole 310. Thus, when the prong 210 is extracted, the lower surface of the prong 210 does not rub against the extraction hole 310. That is, the extraction guide frame 300 supports movement in the widthwise direction of the prong 210, thereby stably performing loading of the product P and the skeleton.

[0040] As shown in Figure 6 , the lifting portions 400 are provided at both lengthwise sides of the main frame 100 to lift the prong 210 and the prong support 200, respectively. The lifting portion 400 is composed of a pair arranged apart in the widthwise direction as one set, and one set is provided to support lifting of both lengthwise ends of the main frame 100, respectively, so that the prong 210 and the prong support 200 mounted to the main frame 100 can be lifted.

[0041] Reference Figure 1 The lifting unit 400 can be fixedly mounted on a fixed frame 10 in the form of a table. The fixed frame 10 can be equipped with a lifting drive device for raising and lowering the main frame 100. The lifting drive device can be constructed using various power devices such as hydraulic cylinders and linear motors.

[0042] Reference Figure 7 and Figure 8 The lifting unit 400 also includes a lifting guide rail 410. The lifting guide rail 410 extends in the vertical direction and is provided on one side of the lifting unit 400. The main frame 100 also includes lifting protruding ends 110, 110a, 110b and lifting guide rollers 120, 120a, 120b.

[0043] In addition, a pair of lifting protrusions 110 are arranged separately along the width direction to form a group, and a group is formed at each end of the main frame 100 along the length direction. One or more lifting guide rollers 120 are provided at each of the lifting protrusions 110, and are guided to rise and fall by the lifting guide rail 410.

[0044] The main frame 100 is supported for vertical movement by the lifting guide roller 120 and the lifting guide rail 410. At this time, as Figure 8 and Figure 9 As shown, the lifting guide rail 410 can be formed in the form of a roller rail or a curved plate. For example... Figure 7 As shown, the lifting guide rail 410A according to the first embodiment is formed in the form of a roller rail with a lifting guide rail groove formed on one side, and the lifting guide roller 120 is inserted into the lifting guide rail groove to support vertical movement. Figure 8 As shown, in the second embodiment, the lifting guide rail 410B is formed in the shape of a frame extending upward and downward in a "┐" cross section. The lifting guide roller 120 contacts the outer side of the lifting guide rail 410B and can support the up and down movement.

[0045] In this case, the characteristic is that the rotation axis of one of the plurality of lifting guide rollers 120 provided on a set of lifting protrusions 110 is in a different direction from the rotation axes of the other lifting guide rollers 120. When the first lifting protrusion 110a is provided on one side of the width direction and the second lifting protrusion 110b is provided on the other side of the width direction in the set of lifting protrusions 110a, the rotation axis of the first lifting guide roller 120a provided on the first lifting protrusion 110a is formed parallel to the width direction, and the rotation axis of the second lifting guide roller 120b provided on the second lifting protrusion 110b is formed parallel to the length direction.

[0046] The first lifting guide roller 120a and the second lifting guide roller 120b are supported by the different curved surfaces of the lifting guide rail 410B and move up and down. Therefore, it is necessary to limit the horizontal movement and shaking that may occur in the fork 210 and fork support 200 during the process of putting down the product P and the skeleton.

[0047] In this invention, the lifting part 400 can be provided in either the first embodiment or the second embodiment, but it can also be used in combination as follows: a lifting guide rail 410A according to the first embodiment is provided on one side of the main frame 100 in the length direction, and a lifting guide rail 420B according to the second embodiment is provided on the other side in the length direction.

[0048] Reference Figure 9 To illustrate, the drive unit 500 is coupled to one side of the main frame 100 to move a pair of fork supports 200, which are fixedly coupled with forks, along the width direction. The drive unit 500 causes the pair of fork supports 200 to converge or re-convex along the width direction, thereby enabling the loading and unloading of product P and the frame.

[0049] The drive unit 500 includes a drive shaft 510, a drive frame 530, and a torque limiter 520. A pair of drive shafts 510 are coaxially mounted on the main frame 100 along the length direction, and at least one drive shaft 510 is equipped with a pinion 511. The drive frame 530 includes a rack and pinion 531 that meshes with the pinion 511, and the pair of drive frames 530 are movably mounted on the main frame 100 along the width direction.

[0050] The drive frame 530 is formed as a frame extending in the width direction, and is configured such that one end in the width direction is fastened to the fork support 200, and the other end faces the center of the main frame 100. The rack and pinion 531 can move the drive frame 530 in the width direction according to the operation of the pinion 511, and the rack and pinion 531 is provided on the upper part or side of the drive frame 530.

[0051] If the drive shaft 510 rotates in the forward direction, the pair of drive frames 530 are introduced towards the center in the width direction and the pair of fork supports 200 are moved towards the center, so that the product P can be placed on the upper part of the fork 210. If the drive shaft 510 rotates in the reverse direction, the pair of drive frames 530 are extended outward in the width direction and the pair of fork supports 200 are also extended outward in the width direction, so that the product P placed on the upper part of the fork can be placed down.

[0052] The main frame 100 is also equipped with a sliding guide rail 130 that guides the movement of the drive frame 530 in the width direction. One side of the drive frame 530 is fastened and guided by the sliding guide rail 130 in a slidable manner in the width direction, thereby enabling more stable operation.

[0053] ReferenceFigure 9 A torque limiter 520 is fastened between a pair of drive shafts 510 and transmits or limits power to the drive shafts 510 based on the measured torque value measured on the pair of drive shafts 510 or the main frame 100. The torque limiter 520 is connected to the power shaft of the drive motor via a pulley or the like and receives power from the drive motor. Because it is positioned between the pair of drive shafts 510, it functions as a coupling that rotates the pair of drive shafts 510. A sensor for measuring torque values ​​is provided on one side of the main frame 100 or the drive shafts 510. If the value measured by the sensor exceeds a set value, the torque limiter 520 determines that a problem has occurred and disconnects from the pair of drive shafts 510, thereby ceasing power transmission.

[0054] Preferably, the drive motor operates such that the fork blades and fork support 200 can only operate within a limited width range. If the control system or drive motor malfunctions and performs operation beyond the limited width range, the load applied to the main frame 100 or drive shaft 510 increases. If the measured load exceeds a set value, the torque limiter 520 immediately disconnects from the pair of drive shafts 510 and idles, thereby blocking the power transmitted to the pair of drive shafts 510 and enabling safe operation. For example, in the event of a collision between the fork blades, the load increases sharply, in which case the torque limiter 520 operates.

Claims

1. A fork assembly for a metal sheet handling system, comprising: a main frame (100) having a quadrangular cross-sectional shape; a plurality of forks (210) arranged at a predetermined interval on both sides in the width direction of the main frame (100); a pair of fork support portions (200) fixedly coupling one end of each of the forks (210); a lifting portion (400) provided on both sides in the length direction of the main frame (100) for lifting the forks (210) and the fork support portions (200); and a drive portion (500) coupled to one side of the main frame (100) and configured to move the pair of fork support portions (200) in the width direction.

2. The fork assembly for a metal sheet handling system according to claim 1, wherein one end of each of the forks (210) is individually assembled and fastened to the lower end of the fork support portion (200) by a bolt or a screw, the tip of at least one of the forks toward the main frame (100) is formed in a shape protruding downward and inclined. including:

3. The fork assembly for a metal plate handling system according to claim 1, wherein an extraction guide frame (300) fixed to both ends in the width direction of the main frame (100), wherein the extraction guide frame (300) includes: an extraction hole (310) formed in a manner that a plurality of extraction holes are arranged at a predetermined interval so that the end of each of the forks (210) can be inserted therethrough; and an extraction guide bearing (320) provided at the lower portion of the extraction hole (310) to support the extraction of the fork (210).

4. The fork assembly for a metal sheet handling system according to claim 1, wherein the main frame (100) includes: a pair of lifting protruding ends (110) protruding outward from both ends in the length direction; and a pair of lifting guide rollers (120) provided on the pair of lifting protruding ends (110) and guided in lifting by a lifting rail (410) of the lifting portion (400).

5. The fork assembly for a metal sheet handling system according to claim 4, wherein the lifting rail (410) is formed in a shape of a roller rail (410A) or a curved plate (410B).

6. The fork assembly for a metal sheet handling system according to claim 5, wherein in the lifting guide rollers (120), the rotational axis of at least one of the lifting guide rollers (120) provided on different lifting protruding ends (110) is different from the rotational axis direction of the other lifting guide rollers (120).

7. The fork assembly for a metal sheet handling system according to claim 1, wherein the drive portion (500) includes: a drive shaft (510) provided in a coaxial state in the length direction on the main frame (100) in a pair, and at least one of the drive shafts (510) is provided with a pinion (511); a drive frame (530) including a rack gear (531) engaged with the pinion (511), the pair of drive frames (530) being movably provided in the width direction on the main frame (100) to move the pair of fork support portions (200) in the width direction; and ​ A torque limiter (520) is fastened between a pair of drive shafts (510) to transmit power to the drive shafts (510) or limit power according to a measured value of torque measured at the drive shafts (510) or the main frame (100).

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