A welding table for circuit board production

Abstract

The utility model relates to the technical field of circuit board production and processing, and discloses a welding table for circuit board production, including a workbench, a clamping assembly, a flipping assembly, and a cleaning assembly; the workbench has a cavity for storing the flipping assembly, and when the flipping assembly drives the clamping assembly to retract into the cavity of the workbench, the circuit board is flipped and cleaned. The utility model can retract the circuit board into the cavity of the workbench while the circuit board is flipping and turning, and then clean the circuit board, so that impurities such as welding slag can be collected instead of being scattered randomly; by setting fan blades, the opening of the workbench cavity still has suction, which can suck away the dry smoke generated during welding and speed up the collection of impurities; by setting a V-shaped opening at the end of the pressure rod, the circuit board can be automatically leveled when clamped, that is, the auxiliary positioning and clamping operation of the circuit board is realized by multiple pressure rods.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board production and processing, in particular to a welding table for circuit board production. Background Art

[0002] Printed Circuit Board (PCB) is a basic component used to support and connect electronic components. It is usually composed of a piece of insulating material (such as epoxy resin or fiberglass) coated with conductive copper foil, and formed into a pattern with a predetermined conductive path through chemical etching or mechanical processing. PCB is widely used in electronic products such as computers, mobile phones, automotive electronics, etc.

[0003] In the production process of circuit boards, some components need to be welded on the circuit boards. In the prior art, the circuit boards are usually welded on a flat work surface. Therefore, after welding, the welding slag on the circuit boards will be scattered on the work surface in a mess. At the same time, when welding the circuit boards, it may involve switching operations on both sides of the circuit boards, so the circuit boards need to be turned over. At this time, the welding slag on the circuit boards needs to be manually cleaned and collected, which seriously delays the progress of the operation. Therefore, it is necessary to provide a welding table that can facilitate the turning of the circuit boards and the collection of welding slag. Utility Model Content

[0004] The utility model aims to provide a welding table for circuit board production, which solves the problems in the prior art that welding slag is scattered and difficult to collect and the circuit board is inconvenient to flip during the welding process of the circuit board.

[0005] The utility model is realized through the following technical scheme: a welding table for circuit board production, comprising a workbench, a clamping assembly, a flipping assembly, and a cleaning assembly, wherein the circuit board is mounted on the clamping assembly, the clamping assembly is arranged on the flipping assembly, the flipping assembly is arranged on the cleaning assembly, and the cleaning assembly is arranged on the workbench; the workbench has a cavity for accommodating the flipping assembly; the flipping assembly can drive the clamping assembly to perform linear reciprocating motion, and can control the reciprocating flipping of the clamping assembly at the same time; when the flipping assembly drives the clamping assembly to extend out of the cavity of the workbench, personnel weld the circuit board; when the flipping assembly drives the clamping assembly to retract into the cavity of the workbench, the cleaning assembly cleans the circuit board, and the flipping assembly flips the circuit board; the cavity of the workbench limits the splashing of welding slag and collects the welding slag; through the above-mentioned arrangement, the circuit board can be retracted into the cavity of the workbench while the circuit board is flipped over to perform operations, so that impurities such as welding slag can be collected instead of being scattered at will.

[0006] In order to better realize the utility model, further, the cleaning assembly includes a cleaning frame fixedly connected to the triangular block, and the cleaning frame is provided with a cleaning strip; the flip assembly includes a C-shaped frame, a slider, a V-shaped lever, a triangular block, a limit column, a crankshaft, a tension spring and a driving member installed on the workbench; the crankshaft includes a central axis and a crank formed by bending one end of the central axis, the central axis is arranged along the X-axis direction and rotatably installed in the slider, the V-shaped lever is installed at one end of the central axis away from the crank and then fixedly connected to the clamping assembly, the crank is connected to one end of the tension spring, and the other end of the tension spring is fixed to the slider; The two limit columns are installed in pairs on the slider to limit the rotation range of the crankshaft; the triangular block is fixedly installed on a C-shaped frame with an upward opening, and the C-shaped frame located below the clamping assembly is slidably arranged along the Y-axis direction; the output end of the driving member is connected to the slider and can drive the slider to slide up and down in the Z-axis direction; the X-axis, Y-axis, and Z-axis are perpendicular to each other; when the driving member drives the slider to move downward, the circuit board clamped by the clamping assembly contacts the cleaning strip of the cleaning assembly for cleaning; after cleaning, the driving member drives the slider to move upward, and the circuit board clamped by the clamping assembly is flipped.

[0007] In order to better realize the utility model, further, the flip assembly also includes a slide rail and a screw installed on the workbench; the driving member is a flip motor, and the output end of the flip motor is transmission-connected to a slider slidably installed on the slide rail through a screw.

[0008] In order to better realize the utility model, further, the cleaning frame is hollowed out.

[0009] In order to better realize the utility model, further, the cleaning component includes a collection box connected to the workbench cavity, the collection box is provided with a pull-out collection box, and the collection box is provided with a filter.

[0010] In order to better realize the utility model, further, the collection box is fixedly connected to a fan motor, and the fan motor is fixedly connected to a fan blade. By providing the fan blade, the opening of the cavity still has suction, which can suck away the dry tobacco generated during welding and accelerate the collection of impurities.

[0011] In order to better realize the utility model, further, the clamping assembly includes a clamping frame, a plurality of pressure rods are slidably connected to the clamping frame, a spring is fixedly connected to the pressure rod, and the spring is fixedly connected to the clamping frame, and the circuit board is clamped by pressing the ends of the pressure rods.

[0012] In order to better implement the utility model, further, one end of the pressure rod close to the circuit board is a V-shaped opening. Through the above arrangement, the circuit board can be automatically leveled when clamped, that is, the auxiliary positioning and clamping operation of the circuit board is achieved through multiple pressure rods.

[0013] In order to better realize the utility model, further, the workbench includes an operating table, the operating table has a cavity, the operating table is fixedly connected to an auxiliary table, and the auxiliary table is provided with a plurality of LED lights.

[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0015] (1) The utility model can retract the circuit board into the cavity of the workbench while the circuit board is being turned over for operation, and then clean the circuit board, so that impurities such as welding slag can be collected instead of being randomly scattered on the workbench;

[0016] (2) The utility model provides a fan blade so that the opening of the workbench cavity still has suction, which can suck away the dry smoke generated during welding and accelerate the collection of impurities;

[0017] (3) The utility model provides a V-shaped opening at the end of the pressure rod, so that the circuit board can be automatically leveled when it is clamped, that is, the auxiliary positioning and clamping operation of the circuit board is achieved by multiple pressure rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0020] Figure 3 It is a sectional view of the overall structure of the utility model.

[0021] Figure 4 This is a schematic diagram of the flip component structure.

[0022] Figure 5 This is a schematic diagram of the flip component structure from a front view angle.

[0023] Figure 6 A schematic diagram of the clamping assembly structure.

[0024] Figure 7 This is a cross-sectional view of the compression rod structure.

[0025] Figure 8 This is a schematic diagram of the cleaning component structure.

[0026] Among them: 11- workbench; 12- clamping assembly; 13- flip assembly; 14- cleaning assembly; 101- operating table; 102- auxiliary table; 103- LED lamp; 104- collection box; 105- clamping frame; 106- C-shaped frame; 107- cleaning rack; 108- slide rail; 109- slider; 110- cleaning bar; 111- lead screw; 112- flip motor; 113- fan blade; 114- V-shaped lever; 115- triangle block; 116- limit column; 117- crankshaft; 118- tension spring; 119- pressure rod; 120- spring; 121- circuit board; 122- fan motor; 123- collection box. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Embodiment 1:

[0029] like Figure 1-Figure 8 As shown, a welding table for circuit board production includes a workbench 11, a clamping assembly 12, a flipping assembly 13, and a cleaning assembly 14. A circuit board 121 is installed on the clamping assembly 12, the clamping assembly 12 is arranged on the flipping assembly 13, the flipping assembly 13 is arranged on the cleaning assembly 14, and the cleaning assembly 14 is arranged on the workbench 11; the workbench 11 has a cavity for accommodating the flipping assembly 13; the flipping assembly can drive the clamping assembly to perform linear reciprocating motion and can control the reciprocating flipping of the clamping assembly; when the flipping assembly 13 drives the clamping assembly 12 to extend out of the cavity of the workbench 11, personnel weld the circuit board 121; when the flipping assembly 13 drives the clamping assembly 12 to retract into the cavity of the workbench 11, the cleaning assembly 14 cleans the circuit board 121 and the flipping assembly 13 flips the circuit board 121; the cavity of the workbench 11 limits the splashing of welding slag and collects the welding slag.

[0030] Embodiment 2:

[0031] The cleaning assembly 14 includes a cleaning frame 107 fixedly connected to the triangular block 115, and a cleaning bar 110 is arranged on the cleaning frame 107; the flip assembly 13 includes a C-shaped frame 106, a slider 109, a V-shaped lever 114, a triangular block 115, a limit column 116, a crankshaft 117, a tension spring 118 and a driving member installed on the workbench 11; the crankshaft 117 includes a central axis and a crank formed by bending one end of the central axis, the central axis is arranged along the X-axis direction and rotatably installed in the slider 109, and the V-shaped lever 114 is installed at the end of the central axis away from the crank The clamping assembly 12 is fixedly connected, the crank is connected to one end of the tension spring 118, and the other end of the tension spring 118 is fixed to the slider 109; the two limit posts 116 are installed in pairs on the slider 109 to limit the rotation amplitude of the crankshaft 117; the triangular block 115 is fixedly installed on the C-shaped frame 106 with an upward opening, and the C-shaped frame 106 located below the clamping assembly 12 is slidably arranged along the Y-axis direction; the output end of the driving member is connected to the slider 109 and can drive the slider 109 to slide up and down in the Z-axis direction; the X-axis, Y-axis, and Z-axis are perpendicular to each other;

[0032] When the driving member drives the slider 109 to move downward, the circuit board 121 clamped by the clamping component 12 contacts the cleaning bar 110 of the cleaning component 14 for cleaning; after cleaning, the driving member drives the slider 109 to move upward, and the circuit board 121 clamped by the clamping component 12 flips over.

[0033] The flip assembly 13 also includes a slide rail 108 and a lead screw 111 installed on the workbench 11 ; the driving member is a flip motor 112 , and the output end of the flip motor 112 is transmission-connected to a slider 109 slidably installed on the slide rail 108 through the lead screw 111 .

[0034] When used for single-sided circuit board welding, a clamping assembly 12 that can clamp the circuit board 121 on both sides is selected; after the two circuit boards 121 are clamped on the two sides of the clamping assembly 12, the surfaces facing outwards that can be welded are recorded as side A and side B respectively.

[0035] When used for double-sided circuit board welding, a clamping assembly 12 is selected to clamp the circuit board 121 from all sides; after a circuit board 121 is clamped in the clamping assembly 12, both sides of the circuit board 121 are exposed to the outside and can be welded. At this time, the two sides of a circuit board 121 are recorded as side A and side B.

[0036] The initial state is when the slider 109 is at the highest position and the A surface of the circuit board 121 faces upward.

[0037] The first stage: With surface A facing upward and surface B facing downward, the clamping assembly 12 moves to the cleaning position to clean surface B. Specifically, the driving member drives the slider 109 to move downward from the initial position, and the V-shaped lever 114 smoothly passes over the opening of the C-shaped frame 106. Then, the lower end of the V-shaped lever 114 presses the inclined surface of the triangular block 115, so that the triangular block 115 and the C-shaped frame 106 slide together along the Y-axis direction, and the cleaning bar 110 begins to pre-clean the B surface of the circuit board 121 to prevent impurities from adhering to the circuit board 121 and affecting subsequent welding.

[0038] The second stage: the clamping assembly 12 is turned over to face B upward and face A downward, and the clamping assembly 12 is moved to the welding position to weld face B. Specifically, the driving member drives the slider 109 to move upward from the lowest position, and the slider 109 drives the V-shaped lever 114 and the crankshaft 117 to move upward together. Due to the sliding of the C-shaped frame 106 in the first stage, the V-shaped lever 114 cannot directly cross the opening of the C-shaped frame 106 at this time, but the upper end of the V-shaped lever 114 is blocked by the open end of one side of the C-shaped frame 106. At this time, the rise of the crankshaft 117 continues, so the tension spring 118 begins to be stretched, and the V-shaped lever 114 begins to drive the crankshaft 117 to rotate synchronously, so that the V-shaped lever 114 can smoothly cross the open end of the C-shaped frame 106. When the V-shaped lever 114 is about to cross When the C-shaped frame 106 is formed, the tension spring 118 is stretched to the limit. At this time, the tension spring 118 is in a vertical state. When the V-shaped lever 114 just passes over the C-shaped frame 106, the rotation of the V-shaped lever 114 causes the tension spring 118 to begin to retract. Therefore, the autonomous retraction of the tension spring 118 causes the V-shaped lever 114 to continue to rotate until another limiting column 116 limits the crankshaft 117. During the entire rotation process, the crankshaft 117 drives the clamping assembly 12 to flip 180 degrees together. At this time, the B side of the circuit board 121 faces upward and the A side faces downward; then the clamping assembly 12 follows the slider 109 to run to the top welding position, which is convenient for the welding equipment to weld the B side of the circuit board 121.

[0039] The third stage: With the B side facing up and the A side facing down, the clamping assembly 12 moves to the cleaning position to clean the A side. Specifically, after the B side of the circuit board 121 is welded, the driving member drives the slider 109 to move downward until the cleaning bar 110 contacts the A side of the circuit board 121 and cleans it.

[0040] The fourth stage: the clamping assembly 12 is turned over to face A upward and face B downward, and the clamping assembly 12 is moved to the welding position to weld face A. Specifically, after cleaning face A, the driving member drives the slider 109 to move upward, driving the clamping assembly 12 to turn 180 degrees. When face B is facing downward, part of the welding slag on the surface will naturally fall off and be collected by the workbench 11. At this time, face A of the circuit board 121 faces upward and face B faces downward. After that, the clamping assembly 12 follows the slider 109 to move to the top welding position, so that the welding equipment can weld face A of the circuit board 121.

[0041] The fifth stage: With side A facing upward and side B facing downward, the clamping assembly 12 moves to the cleaning position to clean side B. Specifically, after the welding of side A of the circuit board 121 is completed, the driving member drives the slider 109 to move downward until the cleaning bar 110 cleans side B of the circuit board 121 so that the welding slag on this side falls off completely.

[0042] Stage 6: The clamping assembly 12 is flipped to face B upward and face A downward, and the clamping assembly 12 is moved to the welding position. Specifically, after cleaning the B side of the circuit board 121, the driving member drives the slider 109 to move upward from the lowest point, and drives the clamping assembly 12 to flip 180 degrees again. When the A side faces downward, part of the welding slag on the surface will naturally fall off and be collected by the workbench 11. At this time, the B side of the circuit board 121 faces upward and the A side faces downward; return to the welding position.

[0043] The seventh stage: the clamping assembly 12 is moved to the cleaning position with the B side facing upward and the A side facing downward. Specifically, the driving member drives the slider 109 to move downward until the cleaning bar 110 cleans the A side of the circuit board 121 so that the solder slag on this side completely falls off.

[0044] The eighth stage: the clamping assembly 12 is flipped to the position where the A side faces upward and the B side faces downward, and the clamping assembly 12 moves to the welding position. Specifically, after cleaning the A side of the circuit board 121, the driving member drives the slider 109 to move upward, driving the clamping assembly 12 to flip 180 degrees. At this time, the A side of the circuit board 121 faces upward and the B side faces downward; then the clamping assembly 12 follows the slider 109 to run to the top welding position, removes the circuit board 121, and completes welding.

[0045] Regardless of whether the circuit board to be welded is a single-sided circuit board or a double-sided circuit board, after the circuit board 121 is welded, cleaned and returned to the welding position, the processed circuit board 121 can be removed and the circuit board to be processed 121 can be installed. By repeating the above-mentioned stages in sequence, the welding of the circuit board and the cleaning of the welding slag can be carried out uninterruptedly.

[0046] Furthermore, the welding quality inspection can be performed after the circuit board 121 leaves the welding position, or the welding quality inspection can be performed in real time when the circuit board 121 is in the welding position. This part of the content does not belong to the improvement of this embodiment, and can be adaptively selected according to actual conditions, so it will not be repeated.

[0047] Through the above arrangement, the circuit board 121 can be put back into the cavity of the workbench 11 while the circuit board 121 is turned over for operation, so that impurities such as welding slag can be collected instead of being scattered randomly.

[0048] like Figure 2-Figure 5As shown, the driving member includes a slide rail 108, the slide rail 108 is mounted on the workbench 11, a slider 109 is slidably connected to the slide rail 108, a lead screw 111 is threadedly connected to the slider 109, the lead screw 111 is mounted on the output end of a flip motor 112, the flip motor 112 is mounted on the slide rail 108, the start of the flip motor 112 controls the movement of the slider 109, and the C-shaped frame 106 is slidably connected to the slide rail 108. When the flip motor 112 is started, the slider 109 is driven to reciprocate longitudinally on the slide rail 108 through the lead screw 111.

[0049] like Figure 3 , Figure 4 As shown, the cleaning frame 107 is hollow.

[0050] Since the cleaning frame 107 is hollow, the fallen impurities will pass through the cleaning frame 107 and will not accumulate on the cleaning frame 107 to affect the operation of the cleaning bar 110 .

[0051] like Figure 8 As shown, the cleaning assembly 14 includes a collection box 104 connected to the cavity of the workbench 11, and a pull-out collection box 123 is provided on the collection box 104, and a filter is provided on the collection box 123.

[0052] The lower part of the cavity of the workbench 11 is funnel-shaped, which is convenient for collecting impurities. The impurities are collected by the collection box 123. After working for a period of time, the collection box 123 can be taken out and replaced.

[0053] like Figure 8 As shown, the collecting box 104 is fixedly connected to a fan motor 122, and the fan motor 122 is fixedly connected to a fan blade 113. By providing the fan blade 113, the opening of the cavity still has suction, which can suck away the dry tobacco generated during welding and accelerate the collection of impurities.

[0054] like Figure 6 As shown, the clamping assembly 12 includes a clamping frame 105, and a plurality of pressure rods 119 are slidably connected to the clamping frame 105. The pressure rods 119 are fixedly connected to springs 120, and the springs 120 are fixedly connected to the clamping frame 105. The circuit board 121 is clamped by pressing the ends of the pressure rods 119.

[0055] like Figure 7 As shown, the end of the pressing rod 119 close to the circuit board 121 is a V-shaped opening. By providing the V-shaped opening, the circuit board 121 can be automatically leveled when being clamped, that is, the auxiliary positioning and clamping operation of the circuit board 121 is achieved through multiple pressing rods 119.

[0056] like Figure 1As shown, the workbench 11 includes an operating table 101, the operating table 101 has a cavity, the operating table 101 is fixedly connected to an auxiliary table 102, and the auxiliary table 102 is provided with a plurality of LED lamps 103. The LED lamps 103 can provide lighting for welding.

[0057] Working principle: the staff uses the pressure rod 119 to clamp the circuit board 121, and then starts the flip motor 112 and the fan motor 122. The flip assembly 13 starts to drive the clamping assembly 12 to start to descend. When the clamping assembly 12 is about to descend to the bottom, the V-shaped lever 114 presses the clamping frame 105 to move horizontally, and the cleaning strip 110 starts to clean the circuit board 121. The impurities are sucked away by the negative pressure generated by the fan blades 113 and collected in the collection box 123. Then the clamping assembly 12 starts to rise. At the same time, the restriction of the C-shaped frame 106 causes the V-shaped lever 114 to drive the clamping assembly 12 to start flipping, completing the flipping of the circuit board 121, and then continue to work on the other side of the circuit board 121; the above steps are repeated until the welding is completed.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A soldering station for circuit board production, characterized in that: The invention comprises a workbench (11), a clamping assembly (12), a flipping assembly (13), and a cleaning assembly (14); the circuit board (121) is mounted on the clamping assembly (12); the clamping assembly (12) is arranged on the flipping assembly (13); the flipping assembly (13) is arranged on the cleaning assembly (14); and the cleaning assembly (14) is arranged on the workbench (11); the workbench (11) has a cavity for accommodating the flipping assembly (13); the flipping assembly can drive the clamping assembly to perform linear reciprocating motion and can control the reciprocating flipping of the clamping assembly; When the flip assembly (13) drives the clamping assembly (12) to extend out of the cavity of the workbench (11), a person welds the circuit board (121); when the flip assembly (13) drives the clamping assembly (12) to retract into the cavity of the workbench (11), the cleaning assembly (14) cleans the circuit board (121) and the flip assembly (13) flips the circuit board (121); the cavity of the workbench (11) limits the splashing of welding slag and collects the welding slag.

2. A soldering station for circuit board production according to claim 1, characterized in that: The cleaning assembly (14) comprises a cleaning frame (107) fixedly connected to a triangular block (115), and a cleaning bar (110) is arranged on the cleaning frame (107); the flip assembly (13) comprises a C-shaped frame (106), a slider (109), a V-shaped lever (114), a triangular block (115), a limit column (116), a crankshaft (117), a tension spring (118) and a driving member mounted on the workbench (11); the crankshaft (117) comprises a central axis and a crank formed by bending one end of the central axis, the central axis is arranged along the X-axis direction and rotatably mounted in the slider (109), and the V-shaped lever (114) is mounted on the end of the central axis away from the crank. 4) is fixedly connected to the clamping assembly (12), the crank is connected to one end of the tension spring (118), and the other end of the tension spring (118) is fixed to the slider (109); the two limit posts (116) are installed in pairs on the slider (109) to limit the rotation amplitude of the crankshaft (117); the triangular block (115) is fixedly installed on the C-shaped frame (106) with an opening facing upward, and the C-shaped frame (106) located below the clamping assembly (12) is slidably arranged along the Y-axis direction; the output end of the driving member is connected to the slider (109) and can drive the slider (109) to slide up and down in the Z-axis direction; the X-axis, the Y-axis, and the Z-axis are perpendicular to each other; When the driving member drives the slider (109) to move downward, the circuit board (121) clamped by the clamping assembly (12) contacts the cleaning bar (110) of the cleaning assembly (14) for cleaning; after the cleaning is completed, the driving member drives the slider (109) to move upward, and the circuit board (121) clamped by the clamping assembly (12) flips over.

3. A soldering station for circuit board production according to claim 2, characterized in that: The flip assembly (13) further comprises a slide rail (108) and a lead screw (111) mounted on the workbench (11); the driving member is a flip motor (112), and the output end of the flip motor (112) is transmission-connected to a slider (109) slidably mounted on the slide rail (108) via the lead screw (111).

4. A soldering station for circuit board production according to claim 2, characterized in that: The cleaning frame (107) is hollow.

5. A soldering station for circuit board production according to claim 1, characterized in that: The cleaning assembly (14) comprises a collection box (104) in communication with a cavity of the workbench (11); a pull-out collection box (123) is provided on the collection box (104); and a filter is provided on the collection box (123).

6. A soldering station for circuit board production according to claim 5, characterized in that: The collection box (104) is fixedly connected to a fan motor (122), and the fan motor (122) is fixedly connected to a fan blade (113).

7. A soldering station for circuit board production according to claim 1, characterized in that: The clamping assembly (12) comprises a clamping frame (105), a plurality of pressure rods (119) are slidably connected to the clamping frame (105), a spring (120) is fixedly connected to the pressure rod (119), and the spring (120) is fixedly connected to the clamping frame (105), and the circuit board (121) is clamped by pressing the ends of the pressure rods (119) to achieve clamping.

8. A soldering station for circuit board production according to claim 7, characterized in that: One end of the pressure rod (119) close to the circuit board (121) is a V-shaped opening.

9. A soldering station for circuit board production according to claim 1, characterized in that: The workbench (11) comprises an operating table (101), the operating table (101) having a cavity, an auxiliary table (102) being fixedly connected to the operating table (101), and a plurality of LED lamps (103) being arranged on the auxiliary table (102).

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