Overhead transport vehicle

Abstract

In a high rack conveyance vehicle (1) in which a main body (3) that holds a conveyance object (90) is cantileveredly supported to a traveling body (2), the high rack conveyance vehicle (1) is provided with a base (23) that is cantilevered to the traveling body (2), a horizontal shaft (28) that is provided integrally with the base (23) and extends in a horizontal direction, and a support (21) that is provided to the main body (3) and supports the horizontal shaft (28) via a rubber bushing (29).

Description

Technical Field

[0001] This invention relates to an elevated transport vehicle. Background Technology

[0002] Patent Document 1 discloses an automated guided vehicle (AGV) comprising: a trolley, an AGV main body mounted on the trolley via a vibration damper, and a transfer device disposed on the AGV main body. The AGV of Patent Document 1 reduces vibration transmitted to items during movement.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2001-298065

[0004] However, in elevated transport vehicles with a structure that holds the main body of the item (the transported object) suspended and supported on the traveling section, as in Patent Document 1, it is not possible to have a structure in which the main body is mounted on the traveling section via a damper for vibration damping. Summary of the Invention

[0005] Therefore, one objective of the present invention is to provide an overhead conveyor vehicle that employs a structure that keeps the main body of the transported object suspended and supported on the traveling part, thereby suppressing the transmission of vibrations from the traveling part to the transported object.

[0006] In one embodiment of the present invention, an overhead conveyor vehicle holds the main body of the transported object suspended and supported on the traveling section. The overhead conveyor vehicle includes: a base section suspended from the traveling section; a horizontal shaft integrally provided with the base section and extending in the horizontal direction; and a support section provided on the main body section and supporting the horizontal shaft via a rubber bushing.

[0007] In this overhead conveyor structure, a horizontal shaft integrally formed with the base section suspended from the driving section is supported by a support section via a rubber bushing. That is, the driving section and the main body are connected via the rubber bushing. Thus, vibrations transmitted from the driving section to the base section are absorbed by the rubber bushing. As a result, even in an overhead conveyor structure that holds the main body of the transported item suspended and supported by the driving section, the transmission of vibrations from the driving section to the transported item can be suppressed.

[0008] In one embodiment of the present invention, the elevated transport vehicle may also have a horizontal axis configured to extend in a direction orthogonal to both the travel direction and the vertical direction of the traveling unit. In this configuration, while allowing angular changes in the traveling unit relative to the main body, the angular change is permitted only in the travel direction of the traveling unit. Therefore, the tilting of the main body can be minimized when the transported object is transferred in a left-right (lateral) direction orthogonal to the travel direction.

[0009] In one embodiment of the present invention, the elevated transport vehicle may be equipped with multiple horizontal axes. This structure allows for a more stable maintenance of the relative positional relationship (or posture of the main body relative to the traveling unit) between the traveling unit and the main body.

[0010] In one embodiment of the present invention, the elevated transport vehicle may consist of only one horizontal shaft and a pair of dampers. These dampers are configured to sandwich the horizontal shaft in the travel direction of the traveling section and are in contact with the main body. This structure not only suppresses the propagation of vibrations but also allows vibrations to decay earlier. Furthermore, this structure more stably maintains the relative positional relationship between the main body and the traveling section.

[0011] In one embodiment of the overhead conveyor of the present invention, the base portion may be suspended from the travel portion via a pair of suspension members extending downward in a vertical direction. The base portion supports the suspension members so that they can rotate about an axis with the extension direction of the suspension members as the axis of rotation. In this structure, torsional stress generated in the suspension members between the mounting portion relative to the travel portion and the mounting portion relative to the base portion can be reduced.

[0012] According to the present invention, even for elevated transport vehicles with a structure that keeps the main body of the transported object suspended and supported on the traveling section, vibrations from the traveling section can be suppressed from propagating to the transported object. Attached Figure Description

[0013] Figure 1 This is a side view of the elevated transport vehicle of the first embodiment.

[0014] Figure 2 Viewed from an oblique angle Figure 1 A three-dimensional view of the main frame of the elevated transport vehicle.

[0015] Figure 3 This is a three-dimensional view of the vibration damping unit viewed from an oblique angle.

[0016] Figure 4 This is a side view of the vibration damping unit.

[0017] Figure 5 From Figure 3 A cross-sectional view when observing the VV line.

[0018] Figure 6 It is a cross-sectional view of the vibration damping unit cut along the front-to-back direction.

[0019] Figure 7 This is a perspective view of the vibration damping unit of the second embodiment, viewed from an obliquely upward angle.

[0020] Figure 8This is a side view of the vibration damping unit of the second embodiment.

[0021] Figure 9 From Figure 7 A cross-sectional view when observing the IX-IX line.

[0022] Figure 10 This is a cross-sectional view of the vibration damping unit of the second embodiment cut along the front-back direction.

[0023] Figure 11 It means Figure 10 A three-dimensional cross-sectional view of the internal structure of the damper. Detailed Implementation

[0024] Hereinafter, an embodiment of the elevated transport vehicle 1 will be described with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used to label the same elements, and repeated descriptions are omitted.

[0025] (First Implementation)

[0026] The elevated transport vehicle 1 of the first embodiment will be described. Figure 1 The overhead conveyor 1 shown travels along a track R located above the ground, such as on the ceiling of a cleanroom. The overhead conveyor 1 transports items 90 between storage equipment and designated loading ports. Examples of items 90 include containers such as FOUPs (Front Opening Unified Pods) storing multiple semiconductor wafers and intermediate mask cassettes storing glass substrates, as well as general components. These containers have flanges 98 that hold them in place on the overhead conveyor 1.

[0027] In the following explanation, for ease of explanation, Figure 1 The left-right direction (X-axis direction) is set as the front-back direction (second direction) of the overhead conveyor 1. Figure 1 The vertical direction (Z-axis direction) is set as the vertical direction (vertical direction) of the overhead conveyor 1. Figure 1 The depth direction (Y-axis direction) is set as the left-right direction or the width direction (first direction) of the overhead conveyor 1. The X-axis direction, Y-axis direction, and Z-axis direction are orthogonal to each other.

[0028] like Figure 1 as well as Figure 2 As shown, the overhead conveyor 1 includes a traveling section 2, a main body 3, and a lifting section 10. The traveling section 2 moves the overhead conveyor 1 along the travel track R. The traveling section 2 is disposed within the travel track R.

[0029] The traveling unit 2 has a front traveling body 2A and a rear traveling body 2B. A connecting part 2D provided on the front traveling body 2A and a connecting part 2D provided on the rear traveling body 2B are connected by a connecting shaft 2E to enable rotation. Traveling rollers 2C and 2C, and travel drive units 2M and 2M are respectively provided on the front traveling body 2A and the rear traveling body 2B. The travel drive unit 2M in the first embodiment is an LDM (Linear DC Motor) that accelerates or brakes the overhead conveyor 1 using magnetic force generated between itself and a magnetic plate disposed on the upper surface of the traveling track R.

[0030] The main body 3 is suspended and supported on the running gear 2. More specifically, the main body 3 is suspended and supported on the running gear 2 by connecting a pair of suspension members 2F, 2F extending vertically downward from the running gear 2 to the vibration damping unit 20 provided on the main body frame 4 of the main body 3. Furthermore, the details of the vibration damping unit 20 will be described in detail later. The main body 3 includes a main body frame 4, a horizontal drive unit 5, a rotary drive unit 6, a lifting drive unit 7, a lifting unit 10, a pair of covers 8, 8, and a controller 80.

[0031] The horizontal drive unit 5 is fixed to the lower part of the main frame 4. The horizontal drive unit 5 causes the rotary drive unit 6, the lifting drive unit 7, and the lifting unit 10 to move in the horizontal plane in a direction orthogonal to the extension direction of the travel track R (left-right direction). The rotary drive unit 6 causes the lifting drive unit 7 and the lifting unit 10 to rotate in the horizontal plane. The lifting drive unit 7 raises and lowers the lifting unit 10 by winding and unwinding the four belts 9. Furthermore, the belts 9 in the lifting drive unit 7 can also use suitable lifting components such as wires and ropes.

[0032] The lifting unit 10 is configured to be raised and lowered by the lifting drive unit 7, functioning as a lifting platform in the overhead conveyor 1. The lifting unit 10 has a holding device 11 for holding the transported object 90, and is raised and lowered by a belt 9 relative to the horizontal drive unit 5, the rotary drive unit 6, and the lifting drive unit 7, which are the main body. The holding device 11 holds the transported object 90. The holding device 11 includes: a pair of arms 12, 12 formed in an L-shape, claws 13, 13 fixed to each arm 12, 12, and an opening and closing mechanism 15 for opening and closing the pair of arms 12, 12.

[0033] The opening and closing mechanism 15 moves a pair of arms 12, 12 in the direction of approaching each other and in the direction of separation from each other. The pair of arms 12, 12 move forward and backward in the back-and-forth direction by the action of the opening and closing mechanism 15. As a result, a pair of claws 13, 13 fixed to the arms 12, 12 open and close.

[0034] In the first embodiment, when the pair of claws 13, 13 are in the open state, the height position of the holding device 11 (lifting part 10) is adjusted so that the holding surface of the claws 13 is lower than the height of the lower surface of the flange 98. Moreover, by closing the pair of claws 13, 13 in this state, the holding surfaces of the claws 13, 13 move in and out below the lower surface of the flange 98. In this state, the lifting part 10 is raised, thereby holding (grabbing) the flange 98 by the pair of claws 13, 13 and supporting the transported object 90.

[0035] A pair of covers 8, 8 are positioned at the front and rear of the vehicle in the direction of travel to cover the horizontal drive unit 5, the rotary drive unit 6, the lifting drive unit 7, the lifting unit 10, and the holding device 11. When the lifting unit 10 is raised to its raised end, the pair of covers 8, 8 form a space below the holding device 11 to accommodate the transported item 90. Each of the pairs of covers 8, 8 has a fall prevention mechanism 8A and a sway suppression mechanism 8B. The fall prevention mechanism 8A prevents the transported item 90 held by the holding device 11 from falling when the lifting unit 10 is raised to its raised end. The sway suppression mechanism 8B suppresses the swaying of the transported item 90 held by the holding device 11 in the front-to-back direction (direction of travel) and the left-to-right direction of the overhead conveyor 1 during travel.

[0036] The controller 80 is an electronic control unit composed of a CPU (Central Processing Unit), ROM (Read Only Memory), and RAM (Random Access Memory). The controller 80 controls various movements within the overhead conveyor 1. Specifically, the controller 80 controls the traveling unit 2, the horizontal drive unit 5, the rotary drive unit 6, and the lifting drive unit 7. The controller 80 can be configured as software, for example, where a program stored in ROM is loaded into RAM and executed by the CPU. The controller 80 can also be configured as hardware based on electronic circuits. The controller 80 communicates with a higher-level controller (not shown) via a power supply unit (power line or feeder) of the traveling track R.

[0037] The following mainly uses Figures 3-6 The vibration damping unit 20 will be described below. The vibration damping unit 20 includes a pair of support portions 21, 21, a base portion 23, and a pair of horizontal shafts 28, 28.

[0038] A pair of support portions 21, 21 are arranged at intervals in the left-right direction and fixed to the upper surface 4a of the main frame 4. The pair of support portions 21, 21 are fixed to the main frame 4, for example, by means of screws 22 or other components. A pair of horizontal shafts 28, 28 extending horizontally in the left-right direction are mounted on the pair of support portions 21, 21. More specifically, each of the pair of support portions 21, 21 has insertion holes 21b, 21b for inserting the pair of horizontal shafts 28, 28 respectively. The insertion holes 21b, 21b are formed at both ends of the base portion 23 in the front-rear direction. A cylindrical rubber bushing 29 is inserted into the insertion hole 21b, and the horizontal shaft 28 is inserted into the rubber bushing 29. That is, the horizontal shaft 28 is supported on the pair of support portions 21 via the rubber bushing 29. The rubber bushing 29 is made of a material such as nitrile rubber. Bolts 28A and washers 28B are provided at both ends of the horizontal shaft 28 in the extending direction to prevent it from falling out of the through hole 21b.

[0039] The rubber bushings 29, 29 inserted into the pair of support portions 21, 21 can also be made of materials with different hardness. For example, by making the hardness of the left and right rubber bushings 29, 29 different, when the center of gravity of the vibration damping unit 20 is different from that of the main body 3 when the object being transported 90 is moved in the left-right direction (lateral direction), it is easier to maintain the relative position (posture) of the main body 3 with respect to the traveling part 2.

[0040] The base portion 23 is suspended from the travel portion 2 via a pair of suspension members 2F, 2F. The base portion 23 is a member extending in the front-rear direction. Through holes 23a, 23a are formed in the base portion 23 for inserting the pair of suspension members 2F, 2F. The through holes 23a, 23a are formed at both ends of the base portion 23 in the front-rear direction. In addition, a bearing 23b is provided on the inner circumferential surface of the through hole 23a, which supports the suspension member 2F so that it can rotate about an axis along the extending direction of the suspension member 2F.

[0041] The base portion 23 is configured to be non-rotatable relative to the horizontal axis 28. More specifically, the horizontal axis 28 is inserted into the through hole 23d formed in the base portion 23, and the horizontal axis 28 is fixed to the base portion 23 by screws 24B. The through holes 23d, 23d are provided at both ends of the base portion 23 in the front-rear direction. That is, the two horizontal axes 28, 28 are non-rotatable in the base portion 23. The base portion 23 is supported by a pair of support portions 21, 21 via the horizontal axes 28, 28.

[0042] The effects of the overhead conveyor 1 according to the first embodiment described above will be explained. In the overhead conveyor 1 of the first embodiment, the horizontal shaft 28, which is integrally formed with the base portion 23 suspended from the travel section 2, is supported on the support portion 21 via a rubber bushing 29. That is, the travel section 2 and the main body portion 3 are connected via the rubber bushing 29. As a result, vibrations transmitted from the travel section 2 to the base portion 23 are absorbed by the rubber bushing 29. As a result, even in an overhead conveyor 1 with a structure in which the main body portion 3 of the transported object 90 is suspended and supported on the travel section 2, the transmission of vibrations from the travel section 2 to the transported object 90 can be suppressed.

[0043] In the elevated transport vehicle 1 of the first embodiment described above, a horizontal shaft 28 is provided extending in a direction orthogonal to both the travel direction and the vertical direction of the traveling unit 2 (left-right direction). Therefore, when the angle of the traveling unit 2 relative to the main body 3 is allowed to change, the angle change is only allowed in the travel direction of the traveling unit 2. Thus, the tilting of the main body 3 during the transfer of the transported object 90 in the left-right direction (lateral direction) orthogonal to the travel direction can be minimized.

[0044] In the elevated transport vehicle 1 of the first embodiment described above, since two horizontal axes are provided, the relative positional relationship between the main body 3 and the traveling part 2 (the posture of the main body 3 relative to the traveling part 2) can be maintained more stably.

[0045] In the elevated transport vehicle 1 of the first embodiment described above, the base portion 23 supports the suspension members 2F, 2F so that they can rotate about an axis with the extension direction of the suspension members 2F, 2F as the rotation axis. Therefore, torsional stress generated in the suspension members 2F, 2F between the mounting portion relative to the travel portion 2 and the mounting portion relative to the base portion 23 can be reduced.

[0046] (Second Implementation)

[0047] The following mainly uses Figure 1 , Figures 7-11 The elevated transport vehicle 1A of the second embodiment will be described. Furthermore, in the elevated transport vehicle 1A of the second embodiment, the structure of the vibration damping unit 120 differs from the structure of the vibration damping unit 20 of the elevated transport vehicle 1 of the first embodiment. Here, the vibration damping unit 120, which has a different structure, will be described in detail; other structural details will be omitted. The vibration damping unit 120 includes a pair of support portions 121, 121, a base portion 123, and a pair of dampers 130, 130.

[0048] A pair of support portions 121, 121 are arranged at intervals in the left-right direction and fixed to the upper surface 4a of the main frame 4. The pair of support portions 121, 121 are fixed to the main frame 4, for example, by screws 122 or other components. A horizontal shaft 126 extending horizontally in the left-right direction is mounted on the pair of support portions 121, 121. More specifically, each of the pair of support portions 121, 121 has an insertion hole 121a for the horizontal shaft 126 to be inserted. The horizontal shaft 126 is mounted to the support portions 121, 121 via bolts 126A and washers 126B provided at both ends of the horizontal shaft 126. A cylindrical rubber bushing 127 is inserted into the insertion hole 121a, and the horizontal shaft 126 is inserted into the rubber bushing 127. That is, the horizontal shaft 126 is supported on the pair of support portions 121, 121 by the rubber bushing 127. The rubber bushing 127 is made of a material such as nitrile rubber. The horizontal axis 126 is positioned approximately at the center of the main frame 4 in the front-to-back direction.

[0049] The base portion 123 is suspended from the travel portion 2 via a pair of suspension members 2F, 2F. The base portion 123 is a member extending in the front-rear direction. Through holes 123a, 123a are formed in the base portion 123 for inserting the pair of suspension members 2F, 2F. The through holes 123a, 123a are formed at both ends of the base portion 123 in the front-rear direction. In addition, a bearing 123b is provided on the inner peripheral surface of the through hole 123a, which supports the suspension member 2F so that it can rotate about an axis along the extending direction of the suspension member 2F.

[0050] The base portion 123 is configured to be non-rotatable relative to the horizontal axis 126. More specifically, the horizontal axis 126 is inserted into a through hole 123c formed in the base portion 123, and the horizontal axis 126 is fixed to the base portion 123 by screws 124A. The base portion 123 is supported by a pair of support portions 121, 121 in a state where it can rotate via the horizontal axis 126 extending in the horizontal direction. In other words, the pair of support portions 121, 121 support the horizontal axis 126, which rotates integrally with the base portion 123, so that it can rotate.

[0051] A pair of dampers 130, 130 are configured to sandwich a horizontal shaft 126 in the front-rear direction and to contact the upper surface 4a of the main frame 4. Furthermore, the damper 130 is inserted into a through-hole 123d formed in the base portion 123, with a portion protruding downwards (towards the upper surface 4a of the main frame 4). The damper 130 absorbs the energy generated upon contact with the upper surface 4a of the main frame 4.

[0052] The damper 130 includes a rubber component 131, a spring component 132, a contact portion 133, a receiving portion 134, and a buffer portion 135. The rubber component 131 has elastic force and is formed of a material such as polyurethane rubber. The spring component 132 is configured to be inserted into the rubber component 131. The elastic force of the spring component 132 can also be greater than the elastic force of the rubber component 131. Therefore, if the spring component 132 contracts to a certain extent, the elastic force of the rubber component 131 is added to the contact portion 133. The elastic force of the spring component 132 is greater than the elastic force of the rubber component 131. The contact portion 133 is a component that contacts the upper surface 4a of the main frame 4. The lower portion of the contact portion 133 that contacts the upper surface 4a of the main frame 4 is formed of a compression-resistant material such as ultra-high molecular weight polyethylene. A flange portion 133a is formed on the upper portion of the contact portion 133, contacting the lower ends of the rubber component 131 and the lower ends of the spring component 132. In this embodiment, the spring member 132 contacts the contact portion 133 in a compressed state, i.e., under added pressure. The receiving portion 134 receives the rubber member 131, the spring member 132, and a portion of the contact portion 133. The buffer portion 135 is a resin bushing provided to prevent wear caused by the up-and-down movement of the contact portion 133.

[0053] A cover 128 is provided on the base portion 123 to cover the upper opening of the insertion hole 123d. The cover 128 is fixed to the base portion 123 by screws 128A or the like. An adjusting screw 129 is provided in the center of the cover 128, which adjusts the amount of pressure (protrusion of contact portion 133) of the damper 130 on the main frame 4. The front end of the adjusting screw 129 abuts against the upper surface 4a of the main frame 4. The protrusion of the contact portion 133, which protrudes from the lower surface of the base portion 123, can be adjusted by rotating the adjusting screw 129 relative to the cover 128.

[0054] The effects of the overhead conveyor 1A according to the second embodiment described above will be explained. In the overhead conveyor 1A of the second embodiment, the horizontal shaft 126, which is integrally formed with the base portion 123 suspended from the travel section 2, is supported on the support portion 121 via a rubber bushing 127. That is, the travel section 2 and the main body portion 3 are connected via the rubber bushing 127. As a result, vibrations transmitted from the travel section 2 to the base portion 123 are absorbed by the rubber bushing 127. As a result, even though the overhead conveyor 1A, like the overhead conveyor 1A of the first embodiment, has a structure in which the main body portion 3 of the transported object 90 is suspended and supported on the travel section 2, it is possible to suppress the transmission of vibrations from the travel section 2 to the transported object 90.

[0055] In the elevated transport vehicle 1A of the second embodiment described above, a horizontal shaft 126 is arranged extending in a direction orthogonal to both the travel direction and the vertical direction of the traveling unit 2 (left-right direction). Therefore, when the angle of the traveling unit 2 relative to the main body 3 is allowed to change, the angle change is only allowed in the travel direction of the traveling unit 2. Thus, the tilting of the main body 3 during the transfer of the transported object 90 in the left-right direction (lateral direction) orthogonal to the travel direction can be minimized.

[0056] In the elevated transport vehicle 1A of the second embodiment described above, only one horizontal shaft 126 is provided. Furthermore, a pair of dampers 130, 130 are provided on the base portion 123, sandwiching the horizontal shaft 126 in the traveling direction of the traveling section 2 and contacting the main body portion 3. In this structure, not only can the propagation of vibrations generated in the traveling section 2 to the main body portion 3 be suppressed, but the vibrations can also be attenuated earlier. Moreover, in the structure of the elevated transport vehicle 1A of the second embodiment described above, the relative positional relationship between the traveling section 2 and the main body portion 3 (the posture of the main body portion 3 relative to the traveling section 2) can be maintained more stably.

[0057] In the elevated transport vehicle 1A of the second embodiment described above, such as Figure 11 As shown, the damper 130 includes a rubber component 131 and a spring component 132. Therefore, by adjusting the compression of the spring component 132, the pressure generated by the damper 130 can be easily adjusted. In the damper 130 of the second embodiment described above, a predetermined pressure is applied. Furthermore, in the overhead conveyor 1A of the second embodiment described above, when neither the traveling section 2 nor the main body section 3 is tilted, the contact portion 133 of the damper 130 contacts the upper surface 4a of the main body frame 4 without applying force to the main body frame 4. In addition, by rotating the adjusting screw 129 to adjust the protrusion of the contact portion 133, the contact portion 133 can be brought into contact with the upper surface 4a of the main body frame 4.

[0058] Here, when the traveling section 2 accelerates forward, a downward force acts on the base section 123, which is in a freely rotating state. However, in the damper 130 under pressure, even if a force causing the front of the base section 123 to sink is applied, the spring member 132 and the rubber member 131 will not be compressed until a predetermined force (i.e., a force greater than the force applied to the spring member 132) is applied, and the base section 123 will not tilt relative to the main frame 4. In the damper 130 of the second embodiment described above, it is configured to withstand the force generated by the assumed acceleration. With such a structure, it is possible to suppress the posture change of the main frame 4 during the acceleration of the overhead conveyor 1A. That is, it is possible to suppress the swaying of the transported object 90 during the acceleration of the overhead conveyor 1A.

[0059] In the overhead conveyor 1A of the second embodiment described above, the aforementioned pressure is applied to the dampers 130, 130 in both the forward and backward directions, thus suppressing changes in the posture of the main frame 4 even when the overhead conveyor 1A decelerates. That is, in the second embodiment described above, since the pressure is set to withstand the force generated by the assumed deceleration, the swaying of the transported object 90 during the deceleration of the overhead conveyor 1A can be suppressed.

[0060] The first and second embodiments have been described above, but the present invention is not limited to the first and second embodiments described above. Various modifications can be made without departing from the spirit of the invention.

[0061] In the first embodiment described above, two horizontal axes 28, 28 are provided. In the second embodiment described above, an example of one horizontal axis 126 is given. However, three or more horizontal axes may also be provided integrally with the base portion 23 (123).

[0062] In the above embodiments and variations, examples of base portion 23 being configured to rotate only in the front-rear direction have been described, but it may also be configured to rotate only in the left-right direction.

[0063] In the above embodiments and variations, examples have been described where the driving unit 2 has a front driving body 2A and a rear driving body 2B that can rotate relative to each other, but it may also be formed by a single driving body.

[0064] Explanation of reference numerals in the attached figures

[0065] 1, 1A… Overhead conveyor; 2… Traveling section; 2F… Suspension component; 3… Main body; 4… Main frame; 20… Vibration damping unit; 21… Support section; 23… Base section; 28… Horizontal shaft; 29… Rubber bushing; 90… Transported object; 120… Vibration damping unit; 121… Support section; 123… Base section; 126… Horizontal shaft; 127… Rubber bushing; 130… Damper; 131… Rubber component; 132… Spring component; 133… Contact section; R… Traveling track.

Claims

1. An overhead conveyor vehicle, wherein a main body is suspended and supported on a traveling unit, the main body having a main frame and a lifting unit disposed at the lower part of the main frame for raising and lowering a holding unit that holds a transported object, wherein... This elevated transport vehicle is equipped with: A base portion, which is suspended from the traveling portion; A horizontal axis, which is integrally provided with the base portion and extends in the horizontal direction; as well as A pair of support portions are disposed on the main frame and support the horizontal shaft via rubber bushings. The main body is suspended and supported on the travel unit via a base portion disposed vertically between the travel unit and the main body frame, and a pair of support portions disposed on the upper surface of the main body frame.

2. The elevated transport vehicle according to claim 1, wherein, The horizontal axis is configured to extend in a direction orthogonal to both the travel direction and the vertical direction of the traveling unit.

3. The elevated transport vehicle according to claim 1, wherein, Multiple horizontal axes are arranged along directions orthogonal to both the extension direction of the horizontal axis and the vertical direction. The horizontal shaft is supported so that it cannot rotate relative to the base portion and the pair of support portions.

4. The elevated transport vehicle according to claim 2, wherein, Multiple horizontal axes are arranged along directions orthogonal to both the extension direction of the horizontal axis and the vertical direction. The horizontal shaft is supported so that it cannot rotate relative to the base portion and the pair of support portions.

5. The elevated transport vehicle according to claim 1, wherein, Only one horizontal axis is set. It also includes a pair of dampers configured to be disposed on the base portion, sandwiching the horizontal axis in the travel direction of the travel portion, and in contact with the upper surface of the main frame.

6. The elevated transport vehicle according to claim 2, wherein, Only one horizontal axis is set. It also includes a pair of dampers configured to be disposed on the base portion, sandwiching the horizontal axis in the travel direction of the travel portion, and in contact with the upper surface of the main frame.

7. The elevated transport vehicle according to any one of claims 1 to 6, wherein, The base portion is suspended from the travel portion via a pair of suspension members extending downward in a vertical direction from the travel portion. The base supports the suspension member so that it can rotate about an axis that serves as the axis of rotation for the extension direction of the suspension member.

8. The elevated transport vehicle according to any one of claims 1 to 6, wherein, The rubber bushings of each of the pair of support portions are formed of materials with different hardnesses.

9. The elevated transport vehicle according to claim 7, wherein, The rubber bushings of each of the pair of support portions are formed of materials with different hardnesses.

Images