Wire board tin dipping and transferring device

CN224917865UActive Publication Date: 2026-10-30KUNSHAN SHENGFU ELECTRONIC PROD CO LTD
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Patent Information

Application Number
CN202522358363.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-06
Publication Date
2026-10-30
Estimated Expiration
2035-11-06

AI Technical Summary

Technical Problem

[0005]本实用新型的目的是提供一种导线板沾锡移载设备,旨在解决现有设计中两套独立移载设备导致空间浪费、限制生产线规划灵活性,以及需复杂控制协调节奏易引发锡炉沾锡位运行停滞或物料堆积、无法同步联动致移载周期长等问题

Benefits of technology

1)采用龙门架结构,且跨设于导线板上料定位台、锡炉与下料定位台上方,将X向驱动单元、Z向驱动单元、第一导线板拾取机械及第二导线板拾取机械集成于一体,所需占用的安装空间较小,进而有效提升整体场地利用效率,利于适配紧凑化的生产布局需求;

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Abstract

The utility model relates to patch inductance manufacturing technical field, especially a lead plate tin dipping transfer equipment coordinates with lead plate loading positioning table, tin furnace, lead plate unloading positioning table and works. The portal frame straddles the top of lead plate loading positioning table, tin furnace and lead plate unloading positioning table is used for bearing support X direction drive unit, Z direction drive unit is transmission connection with X direction drive unit, and mounting beam is transmission connection with Z direction drive unit, and first, second lead plate pickup machinery is all with mounting beam as the installation basis, is responsible for respectively with the lead plate of waiting tin dipping by loading positioning table and moves to tin furnace, and moves to unloading positioning table after the lead plate of tin dipping by tin furnace. In this way, on one hand, with the synchronous operation design of first, second lead plate pickup machinery, and cooperate with the horizontal movement and the lifting action, realize the linkage of transfer action and link, greatly shorten single operation cycle, on the other hand, greatly reduce the space occupied by lead plate tin dipping transfer equipment.
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Description

Technical Field

[0001] This utility model relates to the field of surface mount inductor manufacturing technology, and in particular to a leadboard soldering transfer device. Background Technology

[0002] In the field of electronic component manufacturing, surface mount inductors are core components for energy conversion and signal filtering. Their performance and reliability depend on the quality of the semi-finished product, namely the inductor coil assembly. As the core of the inductor coil assembly, the lead board is the carrier for the precise assembly of multiple inductor coils. The quality and efficiency of its surface soldering directly affect the soldering quality of the inductor coils, ultimately determining the consistency of electrical parameters and the service life of the surface mount inductor product.

[0003] Currently, the soldering of leadboards involves three core stations: loading and positioning, solder pot soldering, and unloading and positioning. The transfer of leadboards between these stations is a crucial link between the front-end processing of surface mount inductors and subsequent assembly, directly impacting the overall production line efficiency. The industry commonly employs two independent transfer systems to handle the transfer between stations: one system specifically picks up the leadboards to be soldered from the loading and positioning station and transfers them to the solder pot soldering station; the other system independently picks up the soldered leadboards from the solder pot soldering station and transfers them to the unloading and positioning station. While it can meet basic transfer requirements, problems are gradually emerging in the context of large-scale and high-speed production of surface mount inductors. Specifically, these problems are: 1) Each set of transfer equipment requires a complete drive, frame, and gripping mechanism, and a safety interval must be reserved to prevent interference. However, surface mount inductor production lines are highly integrated and have a compact space, which limits the flexibility of production line planning; 2) The two sets of transfer equipment require complex control and coordination, which can easily lead to "waiting for materials" or "congestion" at the solder pot's soldering position due to response delays and signal deviations. Furthermore, they cannot be synchronized, resulting in long transfer cycles and hindering capacity improvement.

[0004] Therefore, it is urgent for technical personnel to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a leadboard tinning transfer device, which aims to solve the problems of space waste, limited production line planning flexibility caused by two independent transfer devices in the existing design, and the need for complex control and coordination rhythm that easily leads to stagnation or material accumulation at the tinning station of the tin furnace, and long transfer cycle due to the inability to synchronize and link.

[0006] This utility model relates to a leadboard tinning and transfer device, which works in conjunction with a leadboard loading and positioning platform, a solder pot, and a leadboard unloading and positioning platform. The leadboard tinning and transfer device picks up the leadboard to be tinned at the leadboard loading and positioning platform, transfers it to the solder pot to complete the tinning, and then transfers it to the leadboard unloading and positioning platform to complete the unloading. The leadboard tinning and transfer equipment includes a gantry frame, an X-axis drive unit, a Z-axis drive unit, a mounting beam, a first leadboard picking mechanism, and a second leadboard picking mechanism. The gantry frame spans above the leadboard loading and positioning platform, the solder pot, and the leadboard unloading and positioning platform, and supports the X-axis drive unit. The Z-axis drive unit is drivenly connected to the X-axis drive unit and has X-axis translational freedom. The mounting beam is drivenly connected to the Z-axis drive unit and has Z-axis lifting freedom. Both the first and second leadboard picking mechanisms are mounted on the mounting beam and are spaced apart along the X-axis. The first leadboard picking mechanism transfers the leadboard to be tinned from the leadboard loading and positioning platform to the solder pot, while the second leadboard picking mechanism transfers the tinned leadboard from the solder pot to the leadboard unloading and positioning platform.

[0007] As a further improvement to the technical solution disclosed in this utility model, the interval between the first guide plate picking mechanism and the second guide plate picking mechanism is equal to the distance from the guide plate placement position of the guide plate loading positioning table to the guide plate soldering position of the solder pot, and equal to the distance from the guide plate soldering position of the solder pot to the guide plate placement position of the guide plate unloading positioning table.

[0008] As a further improvement to the technical solution disclosed in this utility model, the X-axis drive unit includes a linear motor module, a slide rail slider assembly, and a support plate; the linear motor module and the slide rail slider assembly are both installed and fixed on the gantry along the X-axis, and the two are arranged in parallel; the support plate is fixedly connected to the output end of the linear motor module; the Z-axis drive unit is fixedly installed on the support plate; when the linear motor module is working, it generates a dragging force, which drives the support plate to perform X-axis lateral movement along the slide rail slider assembly.

[0009] As a further improvement to the technical solution disclosed in this utility model, the X-direction drive unit further includes a first mechanical limiting component and a second mechanical limiting component; both the first mechanical limiting component and the second mechanical limiting component are fixedly installed on the gantry frame at intervals along the X direction, and respectively correspond to the two extreme positions of the bearing plate's lateral movement along the X direction; wherein, the first mechanical limiting component is arranged near the guide plate loading positioning table to limit the maximum distance the bearing plate moves laterally towards the guide plate loading positioning table; the second mechanical limiting component is arranged near the guide plate unloading positioning table to limit the maximum distance the bearing plate moves laterally towards the guide plate unloading positioning table.

[0010] As a further improvement to the technical solution disclosed in this utility model, the first mechanical limiting assembly and the second mechanical limiting assembly have the same design structure; the first mechanical limiting assembly includes a limiting seat, an adjusting bolt, and a limiting block; the limiting seat is fixedly installed on the gantry frame and is arranged along the X direction corresponding to the limit displacement path of the bearing plate; the adjusting bolt is assembled with the limiting seat along the X direction through a threaded pair, and its end extends toward the bearing plate; the limiting block is fixed on the back of the bearing plate and is arranged opposite to the adjusting bolt along the X direction.

[0011] As a further improvement to the technical solution disclosed in this utility model, the Z-axis drive unit is preferably a linear motion cylinder; the cylinder body of the linear motion cylinder is fixedly installed on the bearing plate along the Z-axis, and the end of its piston rod is fixedly connected to the mounting beam; the linear motion cylinder drives the first guide plate picking mechanism and the second guide plate picking mechanism to perform Z-axis lifting and lowering motion synchronously through the extension and retraction action.

[0012] As a further improvement to the technical solution disclosed in this utility model, the first guide plate picking mechanism and the second guide plate picking mechanism have the same design structure; the first guide plate picking mechanism includes a parallel gripper, a first base, a second base, a first clamping member, a transverse extension member, a second clamping member, an insert seat, and a columnar spring. The two output ends of the parallel gripper are fixed to the first base and the second base respectively; the first base and the second base are arranged opposite to each other and open and close in the direction of approaching or moving away from each other under the drive of the parallel gripper; The first clamping member is fixed to the inner wall of the first base, with its clamping surface facing the second base; the transverse extension is L-shaped and fixed to the inner wall of the second base, with its longitudinal extension clamping surface facing the first base. The insert is fixed to the outer side wall of the first base, and has a mounting hole extending in the opening and closing direction for inserting the columnar spring. The second clamping member slides with the first base, and one side wall of the second clamping member abuts against the extended end of the columnar spring to receive an elastic thrust toward the second base; the clamping surface of the second clamping member corresponds to the clamping surface of the longitudinal extension section of the transverse member. During a single opening and closing action of the parallel gripper, the first base and the second base are driven to approach each other. The first clamping member cooperates with the second base to clamp one guide plate. At the same time, the second clamping member cooperates with the longitudinal extension section of the transverse member under the thrust of the columnar spring to clamp the other guide plate.

[0013] In practical applications, the conductive board soldering transfer device disclosed in this utility model can achieve at least the following beneficial technical effects, specifically: 1) It adopts a gantry structure and spans above the lead plate loading and positioning platform, the tin furnace and the unloading positioning platform. It integrates the X-axis drive unit, the Z-axis drive unit, the first lead plate picking machine and the second lead plate picking machine into one unit. It requires less installation space, thereby effectively improving the overall site utilization efficiency and making it easier to adapt to the needs of compact production layout. 2) The first and second leadboard picking machines are arranged at a set distance along the X direction. With the translation of the X-direction drive unit and the lifting action of the Z-direction drive unit, the two operations of "the loading positioning table grabbing the leadboard to be tinned and transferring it to the tin furnace" and "the tin furnace grabbing the tinned leadboard and transferring it to the unloading positioning table" can be completed simultaneously, realizing the linkage of the transfer action, thereby greatly shortening the cycle of a single operation. 3) With the help of the X-axis drive unit and the Z-axis drive unit, the synchronous motion control of the first guide plate picking mechanism and the second guide plate picking mechanism can be realized, thereby reducing the overall procurement cost of the equipment and simplifying the installation and commissioning process. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional schematic diagram of the conductor board tinning and transfer device disclosed in this utility model.

[0016] Figure 2 yes Figure 1 The front view.

[0017] Figure 3 yes Figure 2 AA sectional view.

[0018] Figure 4 This is a three-dimensional schematic diagram of the first mechanical limiting component in the conductor board soldering and transfer device disclosed in this utility model.

[0019] Figure 5 This is a three-dimensional schematic diagram of the first conductor board picking mechanism in the conductor board tinning and transfer device disclosed in this utility model.

[0020] Figure 6 This is a three-dimensional schematic diagram from another perspective of the first guide plate picking mechanism in the guide plate tinning and transfer device disclosed in this utility model.

[0021] Figure 7 yes Figure 6 Side view.

[0022] 1-Gantry frame; 2-X-direction drive unit; 21-Linear motor module; 22-Slide rail slider assembly; 23-Bearing plate; 24-First mechanical limit assembly; 241-Limit seat; 242-Adjusting bolt; 243-Limit stop block; 25-Second mechanical limit assembly; 3-Z-direction drive unit; 4-Mounting beam; 5-First guide plate picking mechanism; 51-Parallel gripper; 52-First base; 53-Second base; 54-First clamping component; 55-Transverse extension component; 56-Second clamping component; 57-Insert seat; 58-Columnar spring; 6-Second guide plate picking mechanism. Detailed Implementation

[0023] The following detailed description of the present invention is provided in conjunction with specific embodiments. The disclosed leadboard tinning and transfer equipment works in conjunction with the leadboard loading and positioning platform, the solder pot, and the leadboard unloading and positioning platform. Its core function is to grab the leadboard to be tinned at the leadboard loading and positioning platform, transfer it to the solder pot to complete the tinning, and then transfer the tinned leadboard to the leadboard unloading and positioning platform to complete the unloading.

[0024] Figures 1-3 The diagram shows the structure of the leadboard tinning and transfer equipment disclosed in this utility model. It is evident that it mainly consists of a gantry frame 1, an X-axis drive unit 2, a Z-axis drive unit 3, a mounting beam 4, a first leadboard picking mechanism 5, and a second leadboard picking mechanism 6. The gantry frame 1 spans above the leadboard loading and unloading positioning platform, the tin furnace, and the leadboard unloading positioning platform. It is preferably constructed from high-strength profiles to provide stable support for the X-axis drive unit 2. The X-axis drive unit 2 is mounted and fixed to the gantry frame 1 along the horizontal X-axis and includes a linear motor module 21, a slide rail slider assembly 22, a support plate 23, a first mechanical limiting assembly 24, and a second mechanical limiting assembly 25. The linear motor module 21 and the slide rail slider assembly 22 are arranged parallel to each other along the height direction. The support plate 23 is fixedly connected to the output end of the linear motor module 21, and the Z-axis drive unit 3 is fixedly mounted on the support plate 23. In practical applications, the linear motor module 21 generates a dragging force when it operates, causing the support plate 23 to move laterally in the X direction along the slide rail slider assembly 22. The first mechanical limiting assembly 24 and the second mechanical limiting assembly 25 are fixed to the gantry frame 1 at intervals along the X direction, respectively corresponding to the two extreme positions of the support plate 23 moving laterally in the X direction; wherein, the first mechanical limiting assembly 24 is located near the guide plate loading positioning table, and is used to limit the maximum distance of the support plate 23 moving laterally in this direction; the second mechanical limiting assembly 25 is located near the guide plate unloading positioning table, and is used to limit the maximum distance of the support plate 23 moving laterally in this direction.

[0025] As Figure 3As shown, the first mechanical limiting assembly 24 and the second mechanical limiting assembly 25 have the same design structure. For the sake of brevity, only the first mechanical limiting assembly 24 will be described here as an example. Figure 4 As shown, the first mechanical limiting assembly 24 mainly consists of a limiting seat 241, an adjusting bolt 242, and a limiting block 243. The limiting seat 241 is fixedly installed on the gantry frame 1 and is arranged along the X-direction corresponding to the extreme displacement path of the bearing plate 23. The adjusting bolt 242 is assembled with the limiting seat 241 along the X-direction via a threaded joint, with its end extending towards the bearing plate 23. The limiting block 243 is fixed to the back of the bearing plate 23 and is positioned opposite to the adjusting bolt 242 along the X-direction. In practical applications, the extension length of the adjusting bolt 242 can be finely adjusted by rotating it to precisely control the extreme displacement of the bearing plate 23 and prevent overtravel collisions during equipment operation.

[0026] like Figure 1 As shown, the Z-axis drive unit 3 is preferably a linear motion cylinder, with its cylinder body fixedly mounted on the support plate 23 along the vertical Z-axis, and the piston rod end fixedly connected to the mounting beam 4. The mounting beam 4 is made of sheet metal and serves as the mounting base for the first guide plate picking machine 5 and the second guide plate picking machine 6. The first guide plate picking machine 5 and the second guide plate picking machine 6 are arranged at a set distance along the X-axis. It should be noted that this interval distance is equal to the distance from the guide plate placement position of the guide plate loading positioning table to the guide plate soldering position of the solder pot, and also equal to the distance from the guide plate soldering position of the solder pot to the guide plate placement position of the guide plate unloading positioning table. When the Z-axis drive unit 3 is started, the extension and retraction of the piston rod drives the mounting beam 4 and the first guide plate picking machine 5 and the second guide plate picking machine 6 to synchronously perform Z-axis lifting and lowering movements, thereby meeting the height adaptation requirements of different workstations.

[0027] As Figure 1 , Figure 2 As shown, the first guide plate pickup mechanism 5 and the second guide plate pickup mechanism 6 have the same design structure. Again, for the sake of brevity, only the first guide plate pickup mechanism 5 will be described here as an example. Figures 5-7As shown, the first guide plate picking mechanism 5 includes a parallel gripper 51, a first base 52, a second base 53, a first clamping member 54, a transverse extension member 55, a second clamping member 56, a mounting base 57, and a columnar spring 58. The two output ends of the parallel gripper 51 are fixed to the first base 52 and the second base 53, respectively. The first base 52 and the second base 53 are arranged opposite each other and can open and close in a direction that moves closer or further apart under the drive of the parallel gripper 51. The first clamping member 54 is fixed to the inner wall of the first base 52, with its clamping surface facing the second base 53. The transverse extension member 55 is L-shaped and fixed to the inner wall of the second base 53, with its longitudinal extension clamping surface facing the first base 52. The mounting base 57 is fixed to the outer wall of the first base 52 and has mounting holes extending in the opening and closing direction for inserting the columnar spring 58. The second clamping member 56 slides in conjunction with the first base 52, with one side wall abutting against the extended end of the columnar spring 58, bearing the elastic thrust toward the second base 53, and its clamping surface corresponding to the clamping surface of the longitudinal extension section of the transverse extension member 55. During a single opening and closing action of the parallel gripper 51, the first base 52 and the second base 53 are driven to move closer together, and the first clamping member 54 cooperates with the second base 53 to clamp one guide plate. At the same time, under the thrust of the columnar spring 58, the second clamping member 56 cooperates with the longitudinal extension section of the transverse extension member 55 to clamp another guide plate, thereby achieving the design purpose of gripping two guide plates in a single action, and the efficiency of the transfer operation is multiplied.

[0028] In practical applications, the first leadboard picking mechanism 5 is responsible for transferring the leadboard to be tinned from the leadboard loading and positioning platform to the solder pot, while the second leadboard picking mechanism 6 is responsible for transferring the tinned leadboard from the solder pot to the leadboard unloading and positioning platform. When the leadboard tinning and transferring equipment is running, the X-axis drive unit 2 drives the Z-axis drive unit 3, the mounting beam 4, and the first leadboard picking mechanism 5 and the second leadboard picking mechanism 6 to move along the X-axis. The Z-axis drive unit 3 drives the first leadboard picking mechanism 5 and the second leadboard picking mechanism 6 to perform lifting and lowering movements. With the design of the interval between the two, two operations can be completed simultaneously: first, the first leadboard picking mechanism 5 picks up the leadboard to be tinned from the leadboard loading and positioning platform and transfers it to the leadboard tinning position in the solder pot; second, the second leadboard picking mechanism 6 picks up the tinned leadboard from the leadboard tinning position in the solder pot and transfers it to the leadboard unloading and positioning platform. In this way, on the one hand, the integrated structure of the gantry 1 significantly reduces the space occupied by the equipment installation, improves the site utilization efficiency, and is conducive to adapting to compact production layouts; on the other hand, the synchronous operation of the first guide plate picking machine 5 and the second guide plate picking machine 6 and the dual guide plate gripping design significantly shorten the single operation cycle; furthermore, the motion control of the first guide plate picking machine 5 and the second guide plate picking machine 6 can be realized by only one set of X-axis drive unit 2 and Z-axis drive unit 3, which significantly reduces the equipment procurement cost and helps to simplify the installation, commissioning and subsequent maintenance process.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A conductive board soldering and transfer device, in conjunction with a conductive board loading and positioning platform, a solder bath, and a conductive board unloading and positioning platform; wherein the conductive board soldering and transfer device grips the conductive board to be soldered at the conductive board loading and positioning platform, transfers it to the solder bath for soldering, and then transfers it to the conductive board unloading and positioning platform for unloading, characterized in that, The leadboard tinning and transfer equipment includes a gantry frame, an X-axis drive unit, a Z-axis drive unit, a mounting beam, a first leadboard picking mechanism, and a second leadboard picking mechanism. The gantry frame spans above the leadboard loading and positioning platform, the solder pot, and the leadboard unloading and positioning platform, and is used to support the X-axis drive unit. The Z-axis drive unit is drivenly connected to the X-axis drive unit and has X-axis translational freedom. The mounting beam is drivenly connected to the Z-axis drive unit and has Z-axis lifting freedom. Both the first and second leadboard picking mechanisms are mounted on the mounting beam and are spaced at intervals along the X-axis. The first leadboard picking mechanism is used to transfer the leadboard to be tinned from the leadboard loading and positioning platform to the solder pot, while the second leadboard picking mechanism is used to transfer the tinned leadboard from the solder pot to the leadboard unloading and positioning platform.

2. The conductor board soldering transfer device according to claim 1, characterized in that, The distance between the first leadboard picking machine and the second leadboard picking machine is equal to the distance from the leadboard placement position of the leadboard loading positioning table to the leadboard soldering position of the solder pot, and equal to the distance from the leadboard soldering position of the solder pot to the leadboard placement position of the leadboard unloading positioning table.

3. The conductor board tinning and transfer device according to claim 2, characterized in that, The X-axis drive unit includes a linear motor module, a slide rail slider assembly, and a support plate; the linear motor module and the slide rail slider assembly are both installed and fixed to the gantry along the X-axis, and are arranged in parallel; the support plate is fixedly connected to the output end of the linear motor module; the Z-axis drive unit is fixedly installed on the support plate; when the linear motor module is working, it generates a drag force, which drives the support plate to perform X-axis lateral movement along the slide rail slider assembly.

4. The conductor board tinning and transfer device according to claim 3, characterized in that, The X-axis drive unit further includes a first mechanical limiting component and a second mechanical limiting component; both the first and second mechanical limiting components are fixedly installed on the gantry frame at intervals along the X-axis, and respectively correspond to the two extreme positions of the bearing plate's lateral movement along the X-axis; wherein, the first mechanical limiting component is arranged near the guide plate loading and positioning table to limit the maximum lateral movement of the bearing plate towards the guide plate loading and positioning table; the second mechanical limiting component is arranged near the guide plate unloading and positioning table to limit the maximum lateral movement of the bearing plate towards the guide plate unloading and positioning table.

5. The conductor board soldering transfer device according to claim 4, characterized in that, The first mechanical limiting assembly and the second mechanical limiting assembly have the same design structure; the first mechanical limiting assembly includes a limiting seat, an adjusting bolt, and a limiting block; the limiting seat is fixedly installed on the gantry frame and is arranged along the X direction corresponding to the extreme displacement path of the bearing plate; the adjusting bolt is assembled with the limiting seat along the X direction through a threaded pair, and its end extends toward the bearing plate; the limiting block is fixed to the back of the bearing plate and is arranged opposite to the adjusting bolt along the X direction.

6. The conductor board soldering transfer device according to claim 3, characterized in that, The Z-axis drive unit is a linear motion cylinder; the cylinder body of the linear motion cylinder is fixedly installed on the bearing plate along the Z-axis, and the end of its piston rod is fixedly connected to the mounting beam; the linear motion cylinder drives the first guide plate picking mechanism and the second guide plate picking mechanism to synchronously perform Z-axis lifting and lowering movements through extension and retraction.

7. The conductor board tinning and transfer device according to any one of claims 1-6, characterized in that, The first lead plate picking mechanism and the second lead plate picking mechanism have the same design structure; the first lead plate picking mechanism includes a parallel gripper, a first base, a second base, a first clamping member, a transverse extension member, a second clamping member, an insert seat, and a columnar spring; The two output ends of the parallel gripper are fixed to the first base and the second base respectively; the first base and the second base are arranged opposite to each other, and open and close in the direction of approaching or moving away from each other under the drive of the parallel gripper; The first clamping member is fixed to the inner wall of the first base, with its clamping surface facing the second base; the transverse extension is L-shaped and fixed to the inner wall of the second base, with its longitudinal extension clamping surface facing the first base. The insert is fixed to the outer side wall of the first base, and has a mounting hole extending in the opening and closing direction for inserting the columnar spring. The second clamping member is slidably engaged with the first base, and one side wall of the clamping member abuts against the extended end of the columnar spring to receive an elastic thrust toward the second base; the clamping surface of the second clamping member corresponds to the clamping surface of the longitudinal extension section of the transverse member. During a single opening and closing action of the parallel pneumatic gripper, the first base and the second base are driven to move closer together. The first clamping member cooperates with the second base to clamp one guide plate. At the same time, under the thrust of the columnar spring, the second clamping member cooperates with the longitudinal extension of the transverse member to clamp another guide plate.