PCB card transfer plug-in box

Abstract

The application relates to the technical field of PCB card processing, in particular to a PCB card transfer and insertion box, which comprises a transfer mechanism, the transfer mechanism comprising side plates and beam parts arranged on the side plates. The PCB card transfer and insertion box is characterized in that a starting power part drives the telescopic part to elongate, the telescopic part drives the interval between the first transfer parts to widen, so that the device can transfer PCB cards of different models and thicknesses; the telescopic part elongates at the same time, driving the second transfer part to contract, so that the second transfer part is folded, the space occupied by the second transfer part is reduced, when a PCB card with small thickness needs to be transferred, the interval between the telescopic parts is narrowed, the telescopic part pulls the second transfer part to elongate at the same time, the interval between the second transfer parts is the same, so that the device can transfer more PCB cards; the height of the top front beam is adjusted, so that the height of the first top transfer card strip and the second top transfer card strip is adjusted, the device can transfer PCB cards with different heights, and the applicability of the device is improved.

Description

Technical Field

[0001] This invention relates to the technical field of PCB board processing, and more particularly to a PCB board transfer box. Background Technology

[0002] In the electronics manufacturing industry, PCB boards come in various sizes and specifications, and various components are soldered on them. They are transported on the production line by conveyor belts. After the semi-finished products come off the line, because PCB boards cannot be stacked, transfer boxes or transfer carts that match the size of the PCB boards are required. The production workshop needs to be equipped with a variety of turnover boxes or turnover carts of various specifications and models, which occupies a lot of space and management resources. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problem that existing PCB board transfer boxes have a large number of specifications and models of turnover boxes or turnover carts that need to be equipped in the workshop, this invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a PCB board transfer box, which can transfer various types of PCB boards.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including,

[0007] The transfer mechanism includes a side plate, a beam portion disposed on the side plate, a telescopic portion disposed on the beam portion, a power portion disposed on the side plate, a first transfer portion disposed on the telescopic portion, a second transfer portion disposed on the beam portion, and a limiting portion disposed on the second transfer portion; and,

[0008] The lifting mechanism includes a lifting part disposed on the side plate, a locking part disposed on the lifting part, and a resistance part disposed on the side plate.

[0009] As a preferred embodiment of the PCB board transfer box of the present invention, the beam portion includes a top rear beam disposed on the side plate, a top front beam disposed on the side plate, a bottom rear beam disposed on the side plate, and a bottom front beam disposed on the side plate.

[0010] As a preferred embodiment of the PCB board transfer box of the present invention, the telescopic part includes a rear slide plate disposed between the top rear beam and the bottom rear beam, a connecting rod disposed on the rear slide plate, and two adjacent connecting rods are cross-arranged and rotatably connected at the cross position.

[0011] As a preferred embodiment of the PCB board transfer box of the present invention, the power unit includes an electric motor disposed on the side plate, a threaded rod disposed on the side plate and connected to the electric motor, and a threaded sleeve disposed on the threaded rod and connected to the rear slide plate.

[0012] As a preferred embodiment of the PCB board transfer box of the present invention, the first transfer part includes a front slide plate disposed on the rear slide plate, a first top transfer bar disposed on the top front beam and connected to the front slide plate, and a first bottom transfer bar disposed on the bottom front beam and connected to the front slide plate.

[0013] As a preferred embodiment of the PCB board transfer box of the present invention, the second transfer part includes a connecting vertical plate disposed between the top rear beam and the bottom rear beam, a follower slide groove disposed on the connecting vertical plate, a second top transfer clip disposed on the follower slide groove, and a second bottom transfer clip disposed on the bottom front beam and connected to the connecting vertical plate.

[0014] As a preferred embodiment of the PCB board transfer box of the present invention, the limiting part includes: a tension spring disposed on the second top transfer bar, a limiting bar disposed on the second top transfer bar, a limiting slide plate disposed on the second top transfer bar, a limiting sliding block disposed in the limiting slide plate and connected to the limiting bar, an assisting spring plate disposed on the second top transfer bar, an assisting spring rod disposed on the assisting spring plate, an assisting spring disposed on the assisting spring rod, and an assisting slider disposed on the assisting spring rod and adapted to the limiting slide plate.

[0015] As a preferred embodiment of the PCB board transfer box of the present invention, the lifting part includes a lifting groove disposed on the side plate, a lifting connecting rod disposed in the lifting groove and connected to the top front beam, and a lifting connecting plate disposed on the lifting connecting rod.

[0016] As a preferred embodiment of the PCB board transfer box of the present invention, the snap-fit ​​part includes a snap-fit ​​spring rod disposed on the lifting connecting plate, a snap-fit ​​spring disposed on the snap-fit ​​spring rod, and a snap-fit ​​hole disposed on the side plate and adapted to the snap-fit ​​spring rod.

[0017] As a preferred embodiment of the PCB board transfer box of the present invention, the resistance part includes a resistance slide plate disposed on the side plate, a resistance slider disposed in the resistance slide plate and connected to the lifting connecting plate, a resistance groove disposed on the resistance slide plate, a resistance threaded rod disposed in the resistance groove, a resistance friction plate disposed on the resistance threaded rod, and a resistance threaded hole disposed on the resistance slider and adapted to the resistance threaded rod.

[0018] The beneficial effects of this invention are as follows: The starting power unit drives the telescopic part to extend, and the telescopic part widens the gap between the first transfer parts, thereby enabling the device to transfer PCB boards of different thicknesses. Simultaneously, the extension of the telescopic part causes the second transfer part to retract, thus folding the second transfer part and reducing its space occupation. When transferring PCB boards of smaller thickness, the gap between the telescopic parts is narrowed, while the telescopic part pulls the second transfer part to extend, and the gap between the second transfer parts is the same, allowing the device to transfer more PCB boards. Adjusting the height of the top front beam adjusts the height of the first and second top transfer bars, enabling the device to transfer PCB boards of different heights, increasing the device's applicability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the power unit of the present invention.

[0022] Figure 3 This is a schematic diagram of the telescopic part of the present invention.

[0023] Figure 4 This is a schematic diagram of the front sliding plate of the present invention.

[0024] Figure 5 For the present invention Figure 2 A magnified view of a portion of point A in the middle.

[0025] Figure 6 This is a schematic diagram of the structure of the second transfer unit of the present invention.

[0026] Figure 7 For the present invention Figure 6 A magnified view of a portion of point B in the middle.

[0027] Figure 8 This is a schematic diagram of the lifting part of the present invention.

[0028] Figure 9 This is a schematic diagram of the resistance section of the present invention. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0033] Example 1

[0034] Reference Figure 1-8 This is the first embodiment of the present invention, which provides a PCB board transfer box. This device includes...

[0035] The transfer mechanism 100 includes a side plate 101, a beam portion 102 disposed on the side plate 101 (two side plates 101 are provided), a beam portion 102 disposed between the two side plates 101, a telescopic portion 103 disposed on the beam portion 102, a power portion 104 disposed on the side plate 101, a first transfer portion 105 disposed on the telescopic portion 103, a second transfer portion 106 disposed on the beam portion 102, and a limiting portion 107 disposed on the second transfer portion 106; and...

[0036] The lifting mechanism 200 includes a lifting part 201 disposed on the side plate 101, a snap-fit ​​part 202 disposed on the lifting part 201, and a resistance part 203 disposed on the side plate 101.

[0037] During use, the starting power unit 104 drives the telescopic part 103 to extend along the beam 102. The telescopic part 103 drives the first transfer part 105 to move, widening the gap between two adjacent first transfer parts 105, thus allowing thicker PCB boards to be placed. As the telescopic part 103 extends, the limiting part 107 drives the second transfer part 106 to retract, folding the second transfer part 106 to both sides of the beam 102. Pulling the locking part 202 releases the limiting on the lifting part 201, adjusting the height of the beam 102, thereby adjusting the height of the first transfer part 105 and the second transfer part 106, so that the device can transfer PCB boards of different heights.

[0038] Example 2

[0039] Reference Figure 1-8 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the beam 102 includes a top rear beam 102a disposed on the side plate 101, a top front beam 102b disposed on the side plate 101, a bottom rear beam 102c disposed on the side plate 101, and a bottom front beam 102d disposed on the side plate 101.

[0040] Preferably, the top rear beam 102a, top front beam 102b, bottom rear beam 102c and bottom front beam 102d are all provided with sliding grooves, the telescopic part 103 is slidably disposed between the top rear beam 102a and the bottom rear beam 102c, and the top front beam 102b is slidably disposed on the side plate 101.

[0041] The telescopic part 103 includes a rear slide plate 103a disposed between the top rear beam 102a and the bottom rear beam 102c, a connecting rod 103b disposed on the rear slide plate 103a, and two adjacent connecting rods 103b are arranged crosswise and rotatably connected at the crosswise position.

[0042] Preferably, the top and bottom of the outer surface of the rear slide plate 103a are provided with slide grooves, and a slider is provided in the slide groove. The slider and the connecting rod 103b are rotatably connected by a rotating shaft. Multiple connecting rods 103b are provided, and they are arranged in pairs and cross each other. The overlapping parts are rotatably connected by a rotating shaft. Multiple connecting rods 103b are combined to form a telescopic frame.

[0043] The power unit 104 includes an electric motor 104a mounted on a side plate 101, a threaded rod 104b mounted on the side plate 101 and connected to the electric motor 104a, and a threaded sleeve 104c mounted on the threaded rod 104b and connected to the rear slide plate 103a.

[0044] Preferably, the outer surface of the threaded rod 104b is provided with opposite threads on both sides, so that the two threaded sleeves 104c can be brought closer to or further away from each other.

[0045] The first transfer section 105 includes a front slide plate 105a disposed on the rear slide plate 103a, a first top transfer bar 105b disposed on the top front beam 102b and connected to the front slide plate 105a, and a first bottom transfer bar 105c disposed on the bottom front beam 102d and connected to the front slide plate 105a.

[0046] Preferably, a groove is provided on the top of the outer surface of the front slide plate 105a for the lifting and lowering of the first top transfer strip 105b and the second top transfer strip 106c. The outer surfaces of the first top transfer strip 105b and the first bottom transfer strip 105c are both provided with slots for limiting and fixing the PBC board.

[0047] The second transfer section 106 includes a connecting vertical plate 106a disposed between the top rear beam 102a and the bottom rear beam 102c, a follower slide 106b disposed on the connecting vertical plate 106a, a second top transfer clip 106c disposed on the follower slide 106b, and a second bottom transfer clip 106d disposed on the bottom front beam 102d and connected to the connecting vertical plate 106a.

[0048] Preferably, the connecting vertical plate 106a is slidably disposed between the top rear beam 102a and the bottom rear beam 102c. The connecting vertical plate 106a is used to install the second top transfer clip 106c and the second bottom transfer clip 106d. The outer surfaces of the second top transfer clip 106c and the second bottom transfer clip 106d are provided with slots for limiting and fixing the PBC board.

[0049] The limiting part 107 includes a tension spring 107a disposed on the second top transfer bar 106c, a limiting bar 107b disposed on the second top transfer bar 106c, a limiting slide plate 107c disposed on the second top transfer bar 106c, a limiting sliding block 107d disposed in the limiting slide plate 107c and connected to the limiting bar 107b, an assisting spring plate 107e disposed on the second top transfer bar 106c, an assisting spring rod 107f disposed on the assisting spring plate 107e, an assisting spring 107g disposed on the assisting spring rod 107f, and an assisting slider 107h disposed on the assisting spring rod 107f and adapted to the limiting slide plate 107c.

[0050] Preferably, the connecting vertical plate 106a near the side plate 101 is fixed to the top rear beam 102a by bolts, ensuring that the tension spring 107a can be stretched when the connecting vertical plate 106a near the first transfer part 105 moves. Due to the setting of the tension spring 107a, the forces on the two adjacent second top transfer clips 106c are balanced, making the distance between the two adjacent second top transfer clips 106c the same. Limit strips 107b are set between the two adjacent second top transfer clips 106c. When the distance between the two adjacent second top transfer clips 106c increases, the second top transfer clips... 106c pulls the limiting strip 107b to rotate. When the limiting strip 107b rotates perpendicular to the second top transfer clamp 106c, the two adjacent second top transfer clamps 106c cannot get closer or further apart, thus ensuring the stability of the second top transfer clamp 106c and preventing it from shaking. The connecting vertical plate 106a near the first transfer part 105 moves and drives the limiting strip 107b to rotate. Since the limiting strip 107b is perpendicular to the second top transfer clamp 106c, the elastic force of the assist spring 107g pushes the limiting strip 107b to rotate, ensuring the normal operation of the device.

[0051] The remaining structure is the same as that in Example 1.

[0052] During operation, the starter motor 104a drives the threaded rod 104b to rotate. The rotation of the threaded rod 104b causes the rear sliding plates 103a on both sides of the threaded sleeve 104c to move away from each other. The rear sliding plates 103a drive the connecting rod 103b to rotate, and the rotation of the connecting rod 103b causes the rear sliding plates 103a to move, thereby increasing the distance between two adjacent rear sliding plates 103a. The rear sliding plates 103a drive the front sliding plate 105a, causing the first top transfer clip 105b to move along the top front beam 102b, and the first bottom transfer clip 105c to move along the bottom front beam 102d. The increased distance between two adjacent first top transfer clips 105b and two adjacent first bottom transfer clips 105c allows the device to transfer thicker PCB boards. While the first top transfer clip 105b moves, due to the elasticity of the assist spring 107g, the assist spring 107g drives the assist spring rod 1... 07f causes the assist slider 107h to push the limiting slider 107d. The first top transfer bar 105b drives the limiting bar 107b to move the limiting slider 107d along the limiting slide plate 107c, thereby releasing the limitation between the two adjacent second top transfer bars 106c. The elastic force of the tension spring 107a causes the second top transfer bars 106c to move closer to each other. The second top transfer bars 106c drive the connecting vertical plate 106a to move to both sides of the top rear beam 102a, thereby folding the second transfer part 106 and storing it on both sides of the device. When it is necessary to transfer PCB boards with smaller thickness, the first top transfer bar 105b is retracted in the same way. The first top transfer bar 105b drives the second top transfer bar 106c to extend, reducing the distance between the first top transfer bars 105b and increasing the distance between the second top transfer bars 106c, thereby increasing the number of PCB boards that the device can transfer.

[0053] Example 3

[0054] Reference Figure 1-9 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the lifting part 201 includes a lifting groove 201a disposed on the side plate 101, a lifting connecting rod 201b disposed in the lifting groove 201a and connected to the top front beam 102b, and a lifting connecting plate 201c disposed on the lifting connecting rod 201b.

[0055] The snap-fit ​​part 202 includes a snap-fit ​​spring rod 202a disposed on the lifting connecting plate 201c, a snap-fit ​​spring 202b disposed on the snap-fit ​​spring rod 202a, and a snap-fit ​​hole 202c disposed on the side plate 101 and adapted to the snap-fit ​​spring rod 202a.

[0056] The resistance section 203 includes a resistance slide plate 203a disposed on the side plate 101, a resistance slider 203b disposed in the resistance slide plate 203a and connected to the lifting connecting plate 201c, a resistance groove 203c disposed on the resistance slide plate 203a, a resistance threaded rod 203d disposed in the resistance groove 203c, a resistance friction plate 203e disposed on the resistance threaded rod 203d, and a resistance threaded hole 203f disposed on the resistance slider 203b and adapted to the resistance threaded rod 203d.

[0057] Preferably, a rubber pad is provided on the side of the resistance friction plate 203e near the resistance slide plate 203a to increase friction. Rotating the resistance friction plate 203e causes the resistance threaded rod 203d to rotate. Due to the setting of the resistance threaded hole 203f, the resistance threaded rod 203d drives the resistance friction plate 203e to make close contact with the outer surface of the resistance slide plate 203a, thereby adjusting the friction between the resistance friction plate 203e and the resistance slide plate 203a, preventing the top front beam 102b from descending too quickly, and increasing the safety of the device.

[0058] The remaining structure is the same as that in Example 2.

[0059] During use, when the transfer height needs to be adjusted, pulling the snap-fit ​​spring rod 202a causes the snap-fit ​​spring 202b to extend, disengaging the snap-fit ​​spring rod 202a from the snap-fit ​​hole 202c, thereby releasing the limit on the lifting connecting plate 201c. Moving the lifting connecting plate 201c downwards causes the lifting connecting rod 201b to move the top front beam 102b downwards along the lifting groove 201a. Due to the friction between the resistance friction plate 203e and the resistance slide plate 203a, the descent speed of the top front beam 102b is slowed. When the snap-fit ​​hole 202c engages with the snap-fit ​​spring rod 202a... When 02a is engaged, the snap-fit ​​spring 202b contracts, causing the snap-fit ​​spring rod 202a to insert into the snap-fit ​​hole 202c, thereby fixing the lifting connecting rod 201b. As the lifting connecting rod 201b descends, it drives the first top transfer clip 105b to descend along the front slide plate 105a, and simultaneously drives the second top transfer clip 106c to descend along the follower slide 106b, thereby adjusting the height of the first top transfer clip 105b and the second top transfer clip 106c, so that the device can transfer PCB boards of different heights.

[0060] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, variations in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​such as temperature, pressure, etc., installation arrangements, use of materials, color, orientation, etc. For instance, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure performing the function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0061] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments may be described, i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A PCB board transfer box, characterized in that: include, The transfer mechanism (100) includes a side plate (101), a beam portion (102) disposed on the side plate (101), a telescopic portion (103) disposed on the beam portion (102), a power unit (104) disposed on the side plate (101), a first transfer portion (105) disposed on the telescopic portion (103), a second transfer portion (106) disposed on the beam portion (102), and a limiting portion (107) disposed on the second transfer portion (106); and, The lifting mechanism (200) includes a lifting part (201) disposed on the side plate (101), a snap-fit ​​part (202) disposed on the lifting part (201), and a resistance part (203) disposed on the side plate (101). The beam (102) includes a top rear beam (102a) disposed on the side plate (101), a top front beam (102b) disposed on the side plate (101), a bottom rear beam (102c) disposed on the side plate (101), and a bottom front beam (102d) disposed on the side plate (101). The telescopic part (103) includes a rear slide plate (103a) disposed between the top rear beam (102a) and the bottom rear beam (102c), a connecting rod (103b) disposed on the rear slide plate (103a), and two adjacent connecting rods (103b) are arranged crosswise and rotatably connected at the crosswise position; The power unit (104) includes an electric motor (104a) mounted on the side plate (101), a threaded rod (104b) mounted on the side plate (101) and connected to the electric motor (104a), and a threaded sleeve (104c) mounted on the threaded rod (104b) and connected to the rear slide plate (103a). The first transfer unit (105) includes a front slide plate (105a) disposed on the rear slide plate (103a), a first top transfer bar (105b) disposed on the top front beam (102b) and connected to the front slide plate (105a), and a first bottom transfer bar (105c) disposed on the bottom front beam (102d) and connected to the front slide plate (105a). The second transfer unit (106) includes a connecting vertical plate (106a) disposed between the top rear beam (102a) and the bottom rear beam (102c), a follower slide groove (106b) disposed on the connecting vertical plate (106a), a second top transfer clip (106c) disposed on the follower slide groove (106b), and a second bottom transfer clip (106d) disposed on the bottom front beam (102d) and connected to the connecting vertical plate (106a). The limiting part (107) includes a tension spring (107a) disposed on the second top transfer bar (106c), a limiting bar (107b) disposed on the second top transfer bar (106c), a limiting slide plate (107c) disposed on the second top transfer bar (106c), a limiting sliding block (107d) disposed in the limiting slide plate (107c) and connected to the limiting bar (107b), an assisting spring plate (107e) disposed on the second top transfer bar (106c), an assisting spring rod (107f) disposed on the assisting spring plate (107e), an assisting spring (107g) disposed on the assisting spring rod (107f), and an assisting slider (107h) disposed on the assisting spring rod (107f) and adapted to the limiting slide plate (107c).

2. The PCB board transfer box according to claim 1, characterized in that: The lifting unit (201) includes a lifting groove (201a) disposed on the side plate (101), a lifting connecting rod (201b) disposed in the lifting groove (201a) and connected to the top front beam (102b), and a lifting connecting plate (201c) disposed on the lifting connecting rod (201b).

3. The PCB board transfer box according to claim 2, characterized in that: The snap-fit ​​part (202) includes a snap-fit ​​spring rod (202a) disposed on the lifting connecting plate (201c), a snap-fit ​​spring (202b) disposed on the snap-fit ​​spring rod (202a), and a snap-fit ​​hole (202c) disposed on the side plate (101) and adapted to the snap-fit ​​spring rod (202a).

4. The PCB board transfer box according to claim 3, characterized in that: The resistance section (203) includes a resistance slide plate (203a) disposed on the side plate (101), a resistance slider (203b) disposed in the resistance slide plate (203a) and connected to the lifting connecting plate (201c), a resistance groove (203c) disposed on the resistance slide plate (203a), a resistance threaded rod (203d) disposed in the resistance groove (203c), a resistance friction plate (203e) disposed on the resistance threaded rod (203d), and a resistance threaded hole (203f) disposed on the resistance slider (203b) and adapted to the resistance threaded rod (203d).

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