Lifting device for tray transfer and test handler provided with same

Abstract

The present invention relates to a lifting device for tray transfer and a test handler provided with the same, and discloses a scheme for eliminating eccentricity and unbalance by correcting the direction of force applied to a tray guide block that places and transfers a tray, with a correction fastening member connected between the tray guide block and a belt drive member that lifts the tray guide block, to correct the direction of force applied to the tray guide block with movement of the belt drive member.

Description

Technical Field

[0001] The present invention relates to a lifting device for pallet conveying and a test sorting machine having the same, and more specifically to a scheme for eliminating eccentricity and unbalancedness by correcting the direction of the force applied to the pallet guide as the pallet guide moves by means of a correction fastening member connected between a pallet guide block that holds and conveys the pallet and a belt drive member that raises and lowers the pallet guide block. Background Technology

[0002] Typically, semiconductor devices can be formed on a silicon wafer, which serves as a semiconductor substrate, by repeatedly performing a series of manufacturing processes. Semiconductor devices formed in this way can be manufactured into semiconductor packages through slicing, bonding, and packaging processes.

[0003] Semiconductor packages can be determined as good or bad products through electrical performance testing.

[0004] The testing process can be performed using a test sorter that sorts the semiconductor package and a tester that provides inspection signals for inspecting the semiconductor package.

[0005] After the semiconductor package is housed in an insertion assembly mounted in a test tray, the test process can be performed by electrically connecting the external universal terminals of the semiconductor package housed in the insertion assembly to the tester. An interface board for connecting the semiconductor package and the tester can be installed on the side wall of the test chamber used to perform the test process. A socket board for communicating with the semiconductor package can be configured on the interface board. Simultaneously, the interface board can be connected to a tester for providing test signals to the semiconductor package.

[0006] To perform this testing process, a lifting device is used to transport a tray containing semiconductor packages. This lifting device can utilize a wrapping connector driving method, such as a chain or belt component, to perform the rising and falling operations. However, in the construction of the lifting device, eccentricity and uneven weight distribution caused by the movement of the chain or belt component can lead to jamming of the drive unit. Furthermore, the continuous accumulation of this eccentricity and uneven weight distribution results in pressure that causes wear and damage to components such as ball bushings that support the stable movement of the tray.

[0007] Patent Document 0001: Korean Patent Publication No. 10-0928633 Summary of the Invention

[0008] The present invention is proposed to solve the problems of the prior art as described above, and its purpose is to eliminate the problems caused by eccentricity and uneven weight distribution when the chain or belt of the lifting device for conveying pallets is used in a belt drive method.

[0009] In particular, its purpose is to solve the problem of the drive unit getting stuck due to eccentricity and weight imbalance caused by the movement of the belt drive components, which prevents the smooth execution of pallet transfer.

[0010] Furthermore, its purpose is to solve the problem of wear and breakage of ball bushings and other components that support the movement of the pallet due to the continuous accumulation of pressure caused by eccentricity and uneven weight distribution.

[0011] The purpose of this invention is not limited to the foregoing content, and other purposes and advantages of this invention not mentioned can be understood from the following description.

[0012] One embodiment of the lifting device for pallet conveying according to the present invention includes: a pallet guide block on which a pallet is placed; a wrapping connector driving component for lifting the pallet guide block; a fixing fastening component mounted on the pallet guide block; and a correction fastening component mounted on the wrapping connector driving component and connected to the fixing fastening component, and rotating about the fixing fastening component to correct the direction of the force applied to the pallet guide block as the wrapping connector driving component moves.

[0013] Preferably, the corrective fastening component may be floatingly connected to the fixed fastening component in a manner that allows it to rotate about the fixed fastening component.

[0014] Alternatively, the fixing fastening component may be installed on the tray guide block adjacent to the side of the hanging belt drive component in a manner that does not impede the movement of the hanging belt drive component. The correction fastening component includes: a fixing fastening part that is fixedly fastened to the hanging belt drive component; and a rotating fastening part that extends laterally from the fixing fastening part for connection to the fixing fastening component.

[0015] As an example, the rotating fastener may have an insertion space with an open portion on one side for the fixed fastener to be inserted and connected, and the cross-sectional area of ​​the fixed fastener is wider than that of the fixed fastener.

[0016] Preferably, the rotating fastener may have a locking mechanism that protrudes to one side of the opening to prevent the fastening component from falling off.

[0017] As an example, the fixed fastening component may have a polygonal cross-section, and bends may be formed at both ends of the fixed fastening component to support the rotation of the corrective fastening component.

[0018] Preferably, the fixing fastening component may include: a support portion having a polygonal cross-section, and the support portion being fixedly mounted to the tray guide block; and one or more wheels mounted at the corners of the support portion to support the rotation of the fixing fastening component.

[0019] As an example, the fixed fastening component may have a circular cross-section, and the rotating fastening part may have an insertion space for the fixed fastening component to be inserted and fitted, with a cross-sectional area wider than that of the fixed fastening component.

[0020] Preferably, the fixing and fastening component may include: a circular wheel capable of rotation; and a support portion that fastens the wheel to the tray guide block and supports the wheel so that the wheel can rotate.

[0021] Furthermore, the lifting device for pallet conveying may further include: pulleys, respectively connected to the two ends of the belt drive component; and a lifting drive unit, which rotates the pulleys to move the belt drive component, thereby causing the pallet guide block to rise or fall.

[0022] Here, the belt drive component may include a chain component or a belt component, with its two ends connected to each other so that it can rotate indefinitely.

[0023] Furthermore, the lifting device for pallet transport may further include: a guide component that supports the pallet guide block and guides the pallet guide block to move up and down; and a ball bushing that is mounted on the pallet guide block to support movement through the guide component.

[0024] As an example, the pallet guide blocks may be arranged in multiple levels along the height direction, and the hanging belt drive components may be arranged horizontally spaced in relation to the number of pallet guide blocks.

[0025] Preferably, the pallet guide block may include a first pallet guide block and a second pallet guide block located above the first pallet guide block in the height direction, and the hanging belt drive component includes: a first hanging belt drive component connected to the side of the first pallet guide block to raise and lower the first pallet guide block; and a second hanging belt drive component horizontally spaced from the first hanging belt drive component and connected to the side of the second pallet guide block to raise and lower the second pallet guide block.

[0026] As an example, the first belt drive component may be spaced apart from the center of the side of the first tray guide block in one direction, and the second belt drive component may be spaced apart from the center of the side of the second tray guide block in the other direction.

[0027] Alternatively, the fixing fastening components can be installed on both sides of the tray guide block, and the hanging belt transmission component and the correction fastening component can be respectively provided corresponding to the two sides of the tray guide block.

[0028] Alternatively, one embodiment of the test sorting machine according to the present invention may include: a constant temperature chamber for adjusting semiconductor components placed in a tray to a test temperature; a test chamber for performing electrical tests on the semiconductor components placed in the tray; a heat removal chamber for adjusting the semiconductor components placed in the tray to room temperature; and the lifting device for tray transport.

[0029] As an example, the lifting device may be configured within the constant temperature chamber to lift the tray.

[0030] As an example, the lifting device may be configured within the heat removal chamber to lift the tray.

[0031] Furthermore, a preferred embodiment of the lifting device for pallet conveying according to the present invention may include: a first pallet guide block on which a pallet is placed; a second pallet guide block on which a pallet is placed and positioned above the first pallet guide block in the height direction; a first belt drive component connected to the side of the first pallet guide block to lift the first pallet guide block; a second belt drive component horizontally spaced from the first belt drive component and connected to the side of the second pallet guide block to lift the second pallet guide block; a fixing fastener mounted on each of the first pallet guide block and the second pallet guide block; and a correction fastener mounted on each of the first belt drive component and the second belt drive component and correspondingly connected to each of the fixing fasteners, and rotating about the fixing fastener to correct the direction of the forces applied to the first pallet guide block and the second pallet guide block as the first belt drive component and the second belt drive component move respectively.

[0032] According to this invention, the problems of eccentricity and uneven weight distribution that occur when pallet guide blocks, which are used to place and transport pallets in a lifting device with a belt drive, are raised or lowered can be solved.

[0033] In particular, by correcting the direction of the force applied when the pallet guide block is raised or lowered by adjusting the fastening components, the problem of jamming of the drive unit due to eccentricity and uneven weight distribution, which prevents smooth pallet transport, can be solved. The problem of wear and damage to ball bushings and other components that support pallet movement due to the pressure caused by the continuous accumulation of eccentricity and uneven weight distribution can also be solved.

[0034] The effects of the present invention are not limited to those mentioned above. Other effects not mentioned can be clearly understood by those skilled in the art from the following description. Attached Figure Description

[0035] Figure 1 A schematic structural diagram of an embodiment of a test sorting machine according to the present invention is shown.

[0036] Figure 2 An embodiment of the constant temperature chamber in this invention is shown.

[0037] Figure 3 An embodiment of the test chamber in this invention is shown.

[0038] Figure 4 An embodiment of the heat removal chamber in this invention is shown.

[0039] Figure 5 A first embodiment of a lifting device for pallet transfer according to the present invention is shown.

[0040] Figure 6 The connection relationship between the fixing fastener and the straightening fastener in the first embodiment is shown.

[0041] Figure 7 A second embodiment of a lifting device for pallet conveying according to the present invention is shown.

[0042] Figure 8 A third embodiment of a lifting device for pallet conveying according to the present invention is shown.

[0043] Figure 9 The connection relationship between the fixing fastener and the straightening fastener in the third embodiment is shown.

[0044] Figure 10 This illustrates the working relationship of a lifting device for pallet transfer based on conventional technology.

[0045] Figure 11 as well as Figure 12 The working relationship of a second embodiment of a lifting device for pallet transfer according to the present invention is shown.

[0046] (Explanation of reference numerals in the attached diagram)

[0047] 100: Test the sorting machine.

[0048] 200: Constant temperature chamber

[0049] 300: Test chamber

[0050] 400: Heat removal chamber,

[0051] 500, 500a, 500b: Lifting device,

[0052] 510, 510a, 510b, 550, 550a, 550b: Pallet guide blocks.

[0053] 520, 520a, 520b, 560, 560a, 560b: Fixed fastening components.

[0054] 530, 530a, 530b, 570, 570a, 570b: Belt drive components.

[0055] 540, 540a, 540b, 580, 580a, 580b: Alignment and fastening components. Detailed Implementation

[0056] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or restricted by the embodiments.

[0057] To illustrate the advantages of the present invention and the objectives achieved through its implementation, preferred embodiments of the present invention are described below with reference to these embodiments.

[0058] First, the terminology used in this application is for illustrative purposes only and is not intended to limit the invention. Unless otherwise explicitly stated in the context, singular expressions may include plural expressions. Furthermore, in this application, terms such as "comprising" or "having" refer to the presence of features, numbers, steps, actions, constituent elements, parts, or combinations thereof described in the specification. This should be understood as not precluding the presence or additional possibilities of one or more other features, numbers, steps, actions, constituent elements, parts, or combinations thereof.

[0059] In the description of this invention, detailed descriptions of related well-known structures or functions are omitted when it is determined that such detailed descriptions may obscure the spirit of the invention.

[0060] The present invention proposes a lifting device for pallet conveying that corrects the direction of the force applied to the pallet guide block to eliminate eccentricity and uneven weight distribution, and a test sorting machine applicable to the lifting device for pallet conveying.

[0061] Figure 1 This is a schematic structural diagram illustrating a test sorting machine according to an embodiment of the present invention.

[0062] The test sorter 100 can be used for electrical testing of semiconductor components 10.

[0063] The chamber module may include a temperature-controlled chamber 200, a test chamber 300, and a heat-removing chamber 400 to perform electrical tests on the semiconductor device 10. A loading module 110 can hold the semiconductor device 10 in a test tray 20 and load the test tray 20 into the chamber module. An unloading module 120 can unload the test tray 20 from the chamber module after the testing process of the semiconductor device 10 is completed, and classify the semiconductor device 10 according to the test results.

[0064] Test tray 20 may include an insertion assembly (not shown) for receiving semiconductor components 10. Loading module 110 can transfer semiconductor components 10 from general-purpose tray 30 to test tray 20, and then transfer test tray 20 to chamber module. Unloading module 120 can sort semiconductor components 10 according to test results after completing the test process and transfer them to general-purpose tray 30, and can also transfer test tray 20 to loading module 110.

[0065] Loading module 110 may include a first component transfer unit (not shown) for transferring semiconductor component 10 from general-purpose tray 30 to test tray 20, and unloading module 120 may include a second component transfer unit (not shown) for transferring semiconductor component 10 from test tray 20 to general-purpose tray 30.

[0066] The chamber module may include a test chamber 300 that provides test space for electrical testing of semiconductor device 10, a constant temperature chamber 200 connected to one side of the test chamber 300 and used to adjust the temperature of semiconductor device 10 to a preset test temperature, and a heat removal chamber 400 connected to the other side of the test chamber 300 and used to restore the temperature of semiconductor device 10 to room temperature after the test process is completed.

[0067] Test tray 20 can be loaded into temperature-controlled chamber 200, where preheating or precooling of semiconductor device 10 can be performed. Next, test tray 20 can be transferred to test chamber 300, where testing can be performed before being transferred to heat-removing chamber 400. The temperature of semiconductor device 10 can be restored to room temperature in heat-removing chamber 400, after which test tray 20 can be unloaded from heat-removing chamber 400.

[0068] The loading module 110 may include a first rotating unit (not shown) for rotating the test tray 20 vertically, allowing it to be conveyed into the thermostatic chamber 200 in an upright position. The test tray 20 can move horizontally within the thermostatic chamber 200, for example, along the Y-axis, during which the temperature of the semiconductor device 10 housed within it can be adjusted. Next, the test tray 20 can be conveyed horizontally, for example, along the X-axis, into the test chamber 300, and after completing the testing process within the test chamber 300, it can be conveyed along the X-axis to the de-heating chamber 400. Within the de-heating chamber 400, the test tray 20 can move in the opposite direction to its movement within the thermostatic chamber 200, i.e., along the negative Y-axis, during which the temperature of the semiconductor device 10 can be restored to room temperature. The unloading module 120 may include a second rotating unit (not shown) for rotating the test tray 20, unloaded from the de-heating chamber 400, horizontally again.

[0069] Figure 2 The illustration is shown to illustrate the above. Figure 1 An embodiment of the thermostatic chamber 200 shown.

[0070] The constant temperature chamber 200 provides a temperature-regulating space for adjusting the temperature of the semiconductor device 10. A first lifting device 202 for transferring the test tray 20 into the constant temperature chamber 200 can be configured on one side of the chamber. Additionally, a second lifting device 220 for transferring the test tray 20 into the test chamber 300 can be configured on the other side of the chamber. Simultaneously, a first tray transfer unit 230 for moving the test tray 20 from the first lifting device 202 towards the second lifting device 220 in the Y-axis direction can be configured within the constant temperature chamber 200.

[0071] Figure 3 The illustration is shown to illustrate the above. Figure 1 An embodiment of the test chamber 300 shown.

[0072] Test chamber 300 can provide a test space for electrical testing of semiconductor device 10. As an example, as described... Figure 3 As shown, two test trays 22 and 24 can be supplied vertically into the test chamber 300. A tester 350, which provides test signals for electrical testing of the semiconductor device 10, can be connected to the outside of the side wall 302 of the test chamber 300. A device under test (DUT) board 310 with an upper opening 312 for connecting the semiconductor device 10 housed in the test tray 22 to the tester 350 and a lower opening 314 for connecting the semiconductor device 10 housed in the lower test tray 24 to the tester 350 can be installed on the side wall 302 of the test chamber 300.

[0073] An interface board 352 for electrically connecting the semiconductor element 10 and the tester 350 can be respectively configured in the upper opening 312 and the lower opening 314. A socket board 354 for connecting to the semiconductor element 10 can be installed on the interface board 352.

[0074] The test chamber 300 may include a pressing unit 320 for pressing the semiconductor element 10 against the socket plate 354. The pressing unit 320 may include a middle plate 324 on which a push rod 322 for pressing the semiconductor element 10 against the socket plate 354 is mounted, a drive unit 326 for applying force to the middle plate 324, and a pressure plate 328 for transmitting the applied force to the middle plate 324. Simultaneously, a conduit 330 may be connected behind the pressure plate 328 to provide a temperature-regulating gas, such as heated air or cooling gas, for adjusting the temperature of the push rod 322.

[0075] Although not shown, it may include a second tray transfer unit (not shown) for transferring the upper test tray 22 and the lower test tray 24 from the temperature-controlled chamber 200 to the interior of the test chamber 300. A guide rail 340 for guiding the upper test tray 22 and the test tray 24 may be installed on the inner side of the device under test board 310, and the second tray transfer unit can move the upper test tray 22 and the lower test tray 24 from the second lifting device 220 along the guide rail 340 into the interior of the test chamber 300.

[0076] Figure 4 The illustration is shown to illustrate the above. Figure 1 An embodiment of the heat removal chamber 400 shown.

[0077] The heat removal chamber 400 can be used to restore the temperature of the semiconductor device 10 to room temperature. A third lifting device 402 can be disposed on one side of the interior of the heat removal chamber 400, and a fourth lifting device 420 can be disposed on the other side of the interior of the heat removal chamber 400. In addition, although not shown, a third tray transfer unit (not shown) may be included for moving the upper test tray 22 and the lower test tray 24 from the test chamber 300 into the interior of the heat removal chamber 400, and the heat removal chamber 400 may include a fourth tray transfer unit 430 for moving the upper test tray 22 and the lower test tray 24 from the third lifting device 402 to the fourth lifting device 420.

[0078] The present invention proposes a lifting device applicable to the chamber module described above. Hereinafter, a lifting device for pallet conveying according to the present invention will be observed through embodiments.

[0079] Figure 5 A first embodiment of a lifting device for pallet transfer according to the present invention is shown.

[0080] The lifting device 500 may include pallet guide blocks 510 and 550 on which the pallet is placed, wrapping connector driving components 530 and 570 for lifting the pallet guide blocks 510 and 550, and lifting drive units (not shown) for driving the wrapping connector driving components 530 and 570.

[0081] The tray guide blocks 510 and 550 can be configured in multiple levels along the lifting height direction. For example, they can include a first tray guide block 550 and a second tray guide block 510 located above the first tray guide block 550.

[0082] The belt drive components 530 and 570 may include chain components or belt components 531 and 571, etc., whose two ends are connected to each other and can rotate indefinitely. The chain components or belt components 531 and 571 fasten pulleys 535 and 575 and are rotated by the lifting drive unit (not shown) so that the chain components or belt components 531 and 571 can rotate.

[0083] When multiple pallet guide blocks are configured, a belt drive component can be configured corresponding to each pallet guide block. For example, a first belt drive component 570 can be configured to raise and lower the first pallet guide block 550, and a second belt drive component 530 can be configured to raise and lower the second pallet guide block 510.

[0084] The first belt drive component 570 and the second belt drive component 530 can be configured separately so as not to affect each other's operation. The first belt drive component 570 can be configured to be separated from the center of the first tray guide block 550 to the right, and the second belt drive component 530 can be configured to be separated from the center of the second tray guide block 510 to the left.

[0085] Alternatively, fastening components 520 and 560 can be installed in a protruding manner on the sides of the tray guide blocks 510 and 550, and straightening fastening components 540 and 580 can be installed on the belt drive components 530 and 570, with the fastening components 520 and 560 connected to the straightening fastening components 540 and 580.

[0086] Refer to together Figure 6 This describes the connection structure of the fixing fasteners 520 and 560 and the straightening fasteners 540 and 580. Figure 6 The connection structure of the alignment fastening member 540 installed in the second belt drive component 530 and the fixing fastening member 520 installed in the second tray guide block 510 is shown.

[0087] The fastening component 520 can be mounted as a protrusion on the side of the tray guide block 510 adjacent to the side of the second belt drive component 530 in a manner that does not impede the movement of the second belt drive component 530.

[0088] Then, in the alignment fastening member 540, a fixing fastening part 541 with a through hole 547 for fixing and mounting the second belt drive member 530 and a rotating fastening part 542 extending laterally from the fixing fastening part 541 and connected to the fixing fastening member 520 can be formed.

[0089] The rotating fastening part 542 of the alignment fastening member 540 may be provided with an insertion space 545, which has an opening on one side for the fastening member 520 to be inserted. Here, the insertion space 545 may be formed as a space with a cross-sectional area wider than that of the fastening member 520.

[0090] The fastening member 520 has a quadrilateral cross-section and bends 521 and 522 at both ends to support the rotation of the straightening member 540. To more clearly illustrate the bends 521 and 522, the... Figure 6 The cross-section of the fastening component 520 is shown as an elliptical shape, but it can be adjusted as needed. The cross-section of the fastening component 520 can also be changed to various polygonal shapes.

[0091] Furthermore, a locking plate 543 that protrudes toward the opening portion can also be formed in the rotating fastening portion 542 to prevent the fastening member 520 from falling off.

[0092] Thus, the force of rising or falling caused by the movement of the fixed fastening components 520 and 560 connected to the straightening fastening components 540 and 580 and the belt drive components 530 and 570 can be transmitted to the tray guide blocks 510 and 550 through the straightening fastening components 540 and 580 and the fixed fastening components 520 and 560.

[0093] In particular, the present invention proposes a structure that can eliminate the eccentricity and unbalanced weight distribution that occurs during lifting and lowering by arranging the first belt drive component 570 and the second belt drive component 530 away from the central portion of the first tray guide block 550 and the second tray guide block 510.

[0094] For this purpose, the corrective fastening components 540 and 580 are floatingly connected to the fixed fastening components 520 and 560, and the corrective fastening components 540 and 580 rotate about the fixed fastening components 520 and 560 according to the direction of the applied force, thereby correcting the direction of the force to relieve eccentricity and imbalance.

[0095] The work of relieving eccentricity and imbalance by correcting the direction of the correcting force of fastening components 540, 580 and fixing fastening components 520, 560 will be described in detail later through embodiments relating to the working relationship of the lifting device for pallet conveying according to the present invention.

[0096] The pallet guide blocks 510 and 550 can be stably raised and lowered by being supported by guide components 591 and 595 arranged along the lifting direction. In order to effectively guide the guide components 591 and 595, ball bushings 511 and 551 can be installed in the pallet guide blocks 510 and 550 to support the raising and lowering of the pallet guide blocks 510 and 550.

[0097] Ball bushings 511 and 551 can be installed on both sides of the tray guide blocks 510 and 550 and supported and raised by guide components 591 and 595 arranged on both sides of the tray guide blocks 510 and 550.

[0098] The Figure 5 The first embodiment is shown on one side, but the same structure can also be configured on the opposite side.

[0099] Figure 7 A second embodiment of a lifting device for pallet conveying according to the present invention is shown.

[0100] The second embodiment is as observed above. Figure 5 The description of the modified embodiments of the first embodiment is omitted, and the description of the parts that are repeated with the first embodiment is omitted.

[0101] In the alignment and fastening components 540a and 580a, an opening and an insertion space can be formed on one side to insert the connection and fixing fastening components 520a and 560a.

[0102] The fixing and fastening components 520a and 560a may include a support portion mounted and fixed to the tray guide block and wheels 525a and 565a fastened to the support portion. Here, the support portion may have a quadrilateral or polygonal cross-section, and the wheels 525a and 565a may be fastened to the corner portions of the support portion. Figure 7 The diagram shows that each of the fixing and fastening components 520a and 560a has four wheels 525a and 565a, but the shape of the support and the number and arrangement of the wheels can be appropriately modified as needed.

[0103] Thus, the fastening components 520a and 560a are equipped with wheels 525a and 565a, which makes it easier to support the rotation of the fastening components 540a and 580a.

[0104] Figure 8 A third embodiment of a lifting device for pallet conveying according to the present invention is shown.

[0105] The third embodiment is the one observed above. Figure 5 The first embodiment and the described Figure 7The second embodiment is a modified embodiment, and the description of the parts that are repeated with the first embodiment and the second embodiment is omitted.

[0106] In the alignment fastening components 540a and 580a, there may be a through hole extending to one side for the fastening components 520b and 560b to be inserted and connected, and the fastening components 520b and 560b are inserted into the through hole to connect and fix the fastening components 520b and 560b.

[0107] The fastening components 520b and 560b may have a circular cross-section, and an insertion space may be formed in the through hole of the fastening components 540a and 580a corresponding to the cross-sectional shape of the fastening components 520b and 560b.

[0108] Preferably, in order to easily support the rotation of the correction fastening components 540a and 580a, the fixing fastening components 520b and 560b may include wheels.

[0109] Reference Figure 9 The connection structure of the fixing fasteners 520b and 560b and the straightening fasteners 540b and 580b will be explained. Figure 9 The connection structure of the alignment fastening member 540b installed in the second belt drive component 530b and the fixing fastening member 520b installed in the second tray guide block 510b is shown.

[0110] The fixing fastener 520b can be mounted as a protrusion on the side of the tray guide block 510b adjacent to the side of the belt drive component 530b in a manner that does not impede the movement of the belt drive component 530b.

[0111] The fixing fastening component 520b may include a rotatable circular wheel 521b and a support portion 525b that fastens the wheel 521b on the tray guide block 510b and supports the wheel 521b so that it can rotate.

[0112] Then, the alignment fastening member 540b can form a fixing fastening portion 541b for fixing and mounting the belt drive member 530b, and a rotating fastening portion 542b extending laterally from the fixing fastening portion 541b for connection with the fixing fastening member 520b. Here, the rotating fastening portion 542b of the alignment fastening member 540b can be provided with an insertion space 545b formed as a through hole for the fixing fastening member 520b to be inserted and connected. The insertion space 545b can be formed to a size for the fixing fastening member 520b to be inserted in an interference fit manner, or it can be formed to a space with a cross-sectional area wider than the cross-section of the fixing fastening member 520b.

[0113] Thus, the fastening components 520b and 560b are equipped with wheels 525b and 565b, which makes it easier to support the rotation of the fastening components 540b and 580b.

[0114] The following explanation will focus on the working principle of relieving eccentricity and imbalance by fixing the fastening component and correcting the direction of the fastening force in this invention, comparing the structure of the present invention with that of the prior art.

[0115] Figure 10 This illustrates the working relationship of a lifting device for pallet transfer based on conventional technology.

[0116] In conventional technology, the lifting device 50 for pallet conveying consists of fastening components 54 and 58 that transmit the force generated by the movement of the belt drive components 53 and 57, which are fixed and installed on the sides of the pallet guide blocks 51 and 55. That is, the fastening components 54 and 58 are fixedly installed on the belt drive components 53 and 57, and simultaneously fixedly connected to the sides of the pallet guide blocks 51 and 55 by means of threaded engagement or the like.

[0117] Based on the construction of this conventional technology, when the belt drive components 53 and 57 raise the tray guide blocks 51 and 55, the forces F1 and F2 generated by the movement of the belt drive components 53 and 57 act on the tray guide blocks 51 and 55 as forces F11 and F22 in different directions.

[0118] As the forces F11 and F22 that lift the pallet guide blocks 51 and 55 act in a diagonal direction different from the upward direction, eccentricity and uneven weight distribution occur in the pallet guide blocks 51 and 55. Due to this eccentricity and uneven weight distribution, different forces F1R, F1L, F2L, and F2R are transmitted to both sides of the pallet guide blocks 51 and 55, causing them to rise in a twisted state. This eccentricity and uneven weight distribution in the pallet guide blocks 51 and 55 hinders their stable upward and downward movement, causing wear and tear on the ball bushings and other components installed in the pallet guide blocks 51 and 55, and ultimately leading to the breakage of the ball bushings due to continuous pressure accumulation.

[0119] The present invention proposes to eliminate such eccentric and unbalanced construction, which will be explained by referring to the working relationship of the second embodiment in the various embodiments of the lifting device for pallet conveying according to the present invention observed above.

[0120] Figure 11 The lifting working relationship of a second embodiment of the lifting device for pallet transfer according to the present invention is shown.

[0121] If the pallet guide blocks 510a and 550a are to rise and the belt drive components 530a and 570a are to move, the correction fastening components 540a and 580a installed in the belt drive components 530a and 570a are to rise and simultaneously abut against the fixing fastening components 520a and 560a installed in the pallet guide blocks 510a and 550a.

[0122] The lifting forces F3 and F4 of the correction fastening components 540a and 580a are gradually transmitted to the fixed fastening components 520a and 560a. At the same time, the correction fastening components 540a and 580a rotate gradually with the fixed fastening components 520a and 560a as the reference.

[0123] As the straightening fasteners 540a and 580a rotate, the lifting forces F3 and F4 move closer to the center of the tray guide blocks 510a and 550a. Simultaneously, the forces F33 and F44 transmitted to the fixing fasteners 520a and 560a by the rotation of the straightening fasteners 540a and 580a are corrected to have the same direction as the lifting forces F3 and F4 transmitted through the belt drive components 530a and 570a. By correcting the direction of the forces generated by the rotation of the straightening fasteners 540a and 580a, eccentricity and imbalance are eliminated, thereby enabling the transmission of the same forces F3L, F3R, F4L, and F4R to both sides of the tray guide blocks 510a and 550a.

[0124] Figure 12 The lowering working relationship of a second embodiment of the lifting device for pallet transfer according to the present invention is shown.

[0125] If the pallet guide blocks 510a and 550a are to descend and the belt drive components 530a and 570a are to move, the correction fastening components 540a and 580a installed in the belt drive components 530a and 570a will descend and simultaneously abut against the fixing fastening components 520a and 560a installed in the pallet guide blocks 510a and 550a.

[0126] The downward forces F5 and F6 of the correction fastening components 540a and 580a are gradually transmitted to the fixed fastening components 520a and 560a. At the same time, the correction fastening components 540a and 580a rotate gradually with the fixed fastening components 520a and 560a as the reference.

[0127] As the straightening fasteners 540a and 580a rotate, the descending forces F5 and F6 move closer to the center of the tray guide blocks 510a and 550a. Simultaneously, the forces F55 and F66 transmitted to the fixing fasteners 520a and 560a by the rotation of the straightening fasteners 540a and 580a are corrected to have the same direction as the ascending forces F5 and F6 transmitted through the belt drive components 530a and 570a. By correcting the direction of the forces generated by the rotation of the straightening fasteners 540a and 580a, eccentricity and imbalance are eliminated, thereby enabling the transmission of the same forces F5L, F5R, F6L, and F6R to both sides of the tray guide blocks 510a and 550a.

[0128] The lifting device for eliminating eccentricity and weight imbalance according to the present invention can be configured in a test sorting machine.

[0129] As an example, the aforementioned lifting device 500 can be configured in a thermostatic chamber 200 where the semiconductor components placed on the tray are adjusted to the test temperature, thereby stably raising and lowering the tray.

[0130] As another example, the aforementioned lifting device 500 can be configured in a heat-removing chamber 400 that adjusts the semiconductor components placed on the tray to room temperature, thereby stably raising and lowering the tray.

[0131] The lifting device 500 of the present invention can be selectively configured at a desired position on the test sorting machine 100.

[0132] The lifting device according to the present invention, as observed above, can eliminate the eccentricity and unbalanced weight distribution that occurs when the pallet guide block is raised or lowered.

[0133] In particular, by correcting the direction of the force applied when the pallet guide block is raised or lowered by adjusting the fastening components, the problem of jamming of the drive unit due to eccentricity and uneven weight distribution, which prevents smooth pallet transport, can be solved. The problem of wear and damage to ball bushings and other components that support pallet movement due to the pressure caused by the continuous accumulation of eccentricity and uneven weight distribution can also be solved.

[0134] The above description is merely illustrative of the technical concept of the present invention. Those skilled in the art can make various modifications and variations without departing from the essential characteristics of the invention. Therefore, the embodiments described herein are for illustrating the technical concept and not for limiting it; the technical concept of the invention is not limited by such embodiments. The scope of protection of the present invention should be interpreted according to the appended claims, and all technical concepts within the same scope are included within the scope of the claims.

Claims

1. A lifting device for pallet conveying, characterized in that, include: Pallet guide block, on which the pallet is placed; The belt drive component causes the tray guide block to rise and fall; A fixing fastener is installed on the tray guide block; as well as A correction fastening component is installed on the belt drive component and connected to the fixing fastening component, and rotates around the fixing fastening component to correct the direction of the force applied to the tray guide block as the belt drive component moves.

2. The lifting device for pallet conveying according to claim 1, characterized in that, The corrective fastening component is floatingly connected to the fixed fastening component in a manner that allows it to rotate around the fixed fastening component.

3. The lifting device for pallet conveying according to claim 1, characterized in that, The fixing and fastening component is installed on the tray guide block adjacent to the side of the belt drive component in a manner that does not impede the movement of the belt drive component. The correction and fastening components include: The fixing and fastening components are fixedly fastened to the belt drive component; and A rotating fastening part extends laterally from the fixed fastening component for connection to the fixed fastening component.

4. The lifting device for pallet conveying according to claim 3, characterized in that, The rotating fastener has an insertion space with an opening on one side for the fixed fastener to be inserted and connected, and the cross-sectional area of ​​the insertion space is wider than that of the fixed fastener.

5. The lifting device for pallet conveying according to claim 4, characterized in that, The rotating fastener has a locking mechanism that protrudes to one side to prevent the fixing fastener from falling off.

6. The lifting device for pallet conveying according to claim 4, characterized in that, The fixed fastening component has a polygonal cross-section, and curved portions are formed at both ends of the fixed fastening component to support the rotation of the corrective fastening component.

7. The lifting device for pallet conveying according to claim 4, characterized in that, The fixing and fastening components include: A support portion, the support portion having a polygonal cross-section, and the support portion being mounted and fixed to the tray guide block; and One or more wheels are mounted at the corners of the support to support the rotation of the correction fastening member.

8. The lifting device for pallet conveying according to claim 3, characterized in that, The cross-section of the fixing fastener is circular. The rotating fastener has an insertion space for the fixed fastener to be inserted and fitted, and the cross-sectional area of ​​the fixed fastener is wider than that of the fixed fastener.

9. The lifting device for pallet conveying according to claim 8, characterized in that, The fixing and fastening components include: A round wheel that can rotate; and The support portion secures the wheel to the tray guide block and supports the wheel so that it can rotate.

10. The lifting device for pallet conveying according to claim 1, characterized in that, The lifting device for pallet transfer also includes: Pulleys are respectively connected to the two ends of the belt drive component; and The lifting drive unit rotates the pulley, causing the belt drive component to move, thereby raising or lowering the pallet guide block.

11. The lifting device for pallet conveying according to claim 1, characterized in that, The belt drive component includes: The chain or belt component has its two ends connected to each other, allowing it to rotate indefinitely.

12. The lifting device for pallet conveying according to claim 1, characterized in that, The lifting device for pallet transfer also includes: Guide components, supporting the pallet guide block and guiding its vertical movement; and A ball bushing is mounted on the tray guide block to support movement through the guide component.

13. The lifting device for pallet conveying according to claim 1, characterized in that, The tray guide blocks are arranged in multiple levels along the height direction. The belt drive components are spaced apart in the horizontal direction according to the number of tray guide blocks.

14. The lifting device for pallet conveying according to claim 13, characterized in that, The pallet guide block includes a first pallet guide block and a second pallet guide block located above the first pallet guide block in the height direction. The belt drive component includes: A first belt drive component is connected to the side of the first tray guide block to raise and lower the first tray guide block; and The second belt drive component is horizontally spaced from the first belt drive component and connected to the side of the second tray guide block to cause the second tray guide block to rise and fall.

15. The lifting device for pallet conveying according to claim 14, characterized in that, The first belt drive component is spaced apart from the center of the side of the first tray guide block in a one-sided direction. The second belt drive component is positioned spaced apart from the center of the side of the second tray guide block toward the other side.

16. The lifting device for pallet conveying according to claim 1, characterized in that, The fixing and fastening components are installed on both sides of the tray guide block. The belt drive component and the correction and fastening component are respectively provided on the two sides of the tray guide block.

17. A testing and sorting machine, characterized in that, include: The temperature-controlled chamber adjusts the semiconductor components placed in the tray to the test temperature; The test chamber performs electrical tests on the semiconductor components placed in the tray; In addition to the heat chamber, the semiconductor components placed in the tray are adjusted to room temperature; as well as The lifting device for pallet transfer according to any one of claims 1 to 16.

18. The test sorting machine according to claim 17, characterized in that, The lifting device is configured within the constant temperature chamber to lift the tray.

19. The test sorting machine according to claim 17, characterized in that, The lifting device is configured within the heat removal chamber to lift the tray.

20. A lifting device for pallet conveying, characterized in that, include: The first pallet guide block, on which the pallet is placed; The second pallet guide block is placed on the pallet and is positioned above the first pallet guide block in the height direction; The first belt drive component is connected to the side of the first pallet guide block to make the first pallet guide block rise and fall; The second belt drive component is horizontally spaced from the first belt drive component and connected to the side of the second tray guide block to cause the second tray guide block to rise and fall. A fastening component is installed on each of the first tray guide block and the second tray guide block; as well as A correction fastening component is installed on each of the first and second belt drive components and connected to each of the respective fixing fastening components. It rotates around the fixing fastening component to correct the direction of the forces applied to the first tray guide block and the second tray guide block as the first and second belt drive components move.

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