Photovoltaic module bracket welding device

Abstract

The present invention relates to the field of welding technology, and in particular to a photovoltaic module bracket welding device. It includes a welding assembly and a splicing assembly. Two groups of welding assemblies are provided, which are respectively provided at the upper and lower parts of a welding box. Each group of welding assemblies includes an adjustment assembly and a positioning part; the welding part is slidably provided on the positioning part; the welder is provided on the welding part; multiple groups of splicing assemblies are provided around the lower welding assembly, and the pillars are limited and moved one by one from the bottom through the limiting sleeve so that they are spliced ​​at the welding points of the main beam; the welder of the upper welding assembly welds the welding points between the main beam and the cross beam; the welder of the lower welding assembly welds the welding points between the main beam and the pillars. The present invention processes the photovoltaic module bracket by assembling first and then welding synchronously at the upper and lower parts, thereby ensuring the efficiency and effect of welding, and the welding process produces little smoke and requires less manpower.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and in particular to a photovoltaic component bracket welding device. Background Art

[0002] Photovoltaic module supports are metal structural systems used to support and secure solar photovoltaic panels (modules). Their function is to ensure that the photovoltaic panels are installed on the ground, roof, or other bases at the optimal angle and stability to maximize power generation efficiency and resist external forces such as wind and snow. Welding is one of the key processes in the manufacture and installation of supports, which directly affects the strength and durability of the structure. Figure 1 As shown, the welded nodes mainly include those between the main beam 1 and the cross beam 2 , and between the main beam 1 and the support 2 .

[0003] A Chinese patent with authorization announcement number CN220312092U discloses a photovoltaic module bracket welding device, including a support frame, a driving assembly is provided at the top of the support frame, a sliding assembly is provided at the top of the support frame, the driving assembly is used to drive the sliding assembly to move, a welding assembly for welding the photovoltaic module bracket is provided on the sliding assembly, a first positioning assembly is provided on the support frame, and a second positioning assembly is provided on the support frame and is located in front of the first positioning assembly.

[0004] The above photovoltaic module bracket welding equipment adopts a local welding method, which can only perform point-by-point welding on part of the bracket structure. During the welding process, the bracket parts need to be repeatedly installed and disassembled, and finally the welded parts need to be manually assembled, adjusted, and welded again to obtain the desired effect. Figure 1 The complete bracket product makes the photovoltaic module bracket welding operation time-consuming and labor-intensive, and highly dependent on manual labor. Summary of the Invention

[0005] In response to the problems existing in the background technology, a photovoltaic module bracket welding device is proposed. Based on the actual size and angle requirements of the photovoltaic module installation, the photovoltaic module bracket is processed by assembling it first and then welding it synchronously from top to bottom, which ensures the efficiency and effect of welding. In addition, the welding process produces little smoke and requires less manpower.

[0006] The present invention provides a photovoltaic module support welding device, including a welding assembly and a splicing assembly. Two groups of welding assemblies are provided, respectively arranged at the upper and lower parts of a welding box. Each group of welding assemblies includes a retractable adjustment assembly and two movable positioning members. The two positioning members are adjusted in spacing and tilt angle by the adjustment assemblies on the corresponding sides. The spacing between the two positioning members in the upper and lower parts is adjustable and the positions are staggered. The welding members are slidably provided on the positioning members. The welding members on the upper two groups of positioning members are used to be respectively sleeved and fixed at the welding points at both ends of the crossbeam. The welding members on the lower two groups of positioning members are used to be respectively sleeved and fixed at the welding points at both ends of the main beam. A welder is provided on the welding member. Multiple groups of splicing assemblies are provided around the lower welding assembly. The pillars are limited and moved one by one from the bottom through the limiting sleeve so that they are spliced ​​at the welding points of the main beam. The welder of the upper welding assembly welds the welding points between the main beam and the crossbeam. The welder of the lower welding assembly welds the welding points between the main beam and the pillars.

[0007] Preferably, the adjustment assembly includes a mounting base located on the wall of the welding box; a lifting drive member is located on the mounting base, driving the mounting frame to move up and down; a rotating frame is provided on the mounting frame and is driven to rotate by a rotating drive member; a bidirectional translation drive member is provided on the rotating frame; two sets of positioning members are respectively connected to the driving ends of the bidirectional translation drive member through mounting rods.

[0008] Preferably, the positioning member includes two groups of positioning plates arranged in parallel, one above and one below; one group of positioning plates is connected to the mounting rods on the corresponding sides; the electrically controlled telescopic rods are respectively connected to the two ends of the two pairs of positioning plates to form a telescopic frame-type positioning structure; movable positioning rollers are provided on the opposite ends of the two pairs of positioning plates; multiple groups of welding parts are opposite to each other and are respectively slidably arranged on one side of the two pairs of positioning plates, connected to the frame-type positioning structure, and at the same time located between the two groups of positioning members.

[0009] Preferably, the welding part includes a welding ring slidably arranged on the positioning plate; a through hole is reserved in the welding ring for the crossbeam and the main beam to pass through; and the welder rotates around the through hole along a circular rule to weld.

[0010] Preferably, a coaxial mounting ring is provided in the through hole; and a circle of retractable positioning rods is provided inside the mounting ring.

[0011] Preferably, a gas collecting hood is provided around the periphery of the welding ring, and a gas pump is also provided; a gas collecting head connected to the gas pump is provided on the wall of the gas collecting hood; and the arrangement trajectory of the gas collecting head coincides with the movement trajectory of the welder.

[0012] Preferably, the welding ring is slidably connected to the positioning plate via a sliding rod, and the welding ring can move up and down along the sliding rod.

[0013] Preferably, the welder includes a telescopic rod 1 that is driven by a driving structure to rotate around the through hole and simultaneously rotate around the origin; the telescopic rod 2 is arranged on the telescopic end of the telescopic rod 1 and forms a bending structure with the telescopic rod 1; the welding head is arranged on the telescopic end of the telescopic rod 2.

[0014] Preferably, a mounting groove is provided at the bottom of the welding box; the bottom of the limiting sleeve is arranged in the mounting groove to move forward, backward, left and right, and the top is open, and a locking piece is provided on the open portion.

[0015] Preferably, a sliding bar that moves forward and backward is provided in the installation groove; and the limiting sleeve is slidably provided on the sliding bar along the left-right direction.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: two sets of welding assemblies, one above and one below, in staggered mirror images, and four sets of independently movable splicing assemblies are provided. The two sets of welding assemblies are respectively coordinated through welding parts, adjustment assemblies and positioning parts to adjust the positions between the main beam and the cross beam, between the main beam and the main beam, and between the cross beam and the cross beam, and then combined with the overall angle adjustment to form an inclined frame that meets the installation requirements of the photovoltaic panel. The splicing assembly limits and moves the pillars through the limit sleeve, and is then spliced ​​with the inclined frame to form the overall structure of the photovoltaic component bracket. After the combined splicing, the upper welding head welds the welding points between the cross beam and the main beam by telescoping in two directions and rotating in two ways; the lower welding head welds the welding points between the pillar and the main beam by telescoping in two directions and rotating in two ways; during the welding process, the smoke generated during the welding process is collected and filtered at close range by the gas collecting head, while accelerating the cooling. The above-mentioned photovoltaic module bracket welding device is based on the actual size and angle requirements of the photovoltaic module installation. It processes the photovoltaic module bracket by assembling it first and then welding it synchronously from top to bottom, ensuring the efficiency and effect of welding. In addition, the welding process produces little smoke and requires less manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the photovoltaic module support structure;

[0018] Figure 2 This is a diagram of the photovoltaic module bracket welding device;

[0019] Figure 3 This is a cross-sectional view of the welding box;

[0020] Figure 4 Schematic diagram of the welding assembly structure;

[0021] Figure 5 It is the front view of the positioning member structure;

[0022] Figure 6 It is the rear view of the positioning member structure;

[0023] Figure 7This is the front view of the weldment structure;

[0024] Figure 8 This is the rear view of the welded structure;

[0025] Figure 9 It is a schematic diagram of the structure of multiple groups of splicing components;

[0026] Figure 10 This is a schematic diagram of the structure of a single set of splicing components.

[0027] Reference numerals: 1, main beam; 2, cross beam; 3, pillar; 4, welding box; 401, mounting groove; 5, welding assembly; 501, positioning member; 50101, positioning plate; 50102, electric telescopic rod; 50103, movable positioning roller; 502, adjustment assembly; 50201, mounting seat; 50202, lifting drive member; 50203, mounting frame; 50204, rotating frame; 50205, two-way translation drive member; 50206, mounting rod; 503, welding member ;50301, welding ring; 50302, gas collecting hood; 50303, gas collecting head; 50304, vacuum pump; 50305, mounting ring; 50306, positioning rod; 50307, ​​sliding rod; 504, welding device; 50401, telescopic rod one; 50402, telescopic rod two; 50403, welding head; 6, splicing assembly; 601, limit sleeve; 602, snap-fit ​​part; 603, sliding bar; 604, screw two; 605, screw three; 606, translation block. DETAILED DESCRIPTION

[0028] Example 1, as Figure 1-Figure 3 As shown, the present invention proposes a photovoltaic module support welding device, including a welding assembly 5 and a splicing assembly 6. Two groups of welding assemblies 5 are provided, respectively arranged at the upper and lower parts of the welding box 4. Each group of welding assemblies 5 includes a retractable adjustment assembly 502 and two movable groups of positioning members 501. The two groups of positioning members 501 are adjusted in spacing and tilt angle by the adjustment assemblies 502 on the corresponding sides. The spacing between the two groups of positioning members 501 is adjustable and the positions are staggered. The welding members 503 are slidably provided on the positioning members 501. The welding members 503 on the upper two groups of positioning members 501 are used to be respectively connected and fixed at the welding points at both ends of the crossbeam 2. The welding members 503 on the lower two groups of positioning members 501 are used to be respectively connected and fixed at the welding points at both ends of the main beam 1. The welder 504 is provided on the welding member 503. Multiple groups of splicing assemblies 6 are provided around the lower welding assembly 5. The support 3 is limited and moved one by one from the bottom through the limit sleeve 601 so that it is spliced ​​at the welding point of the main beam 1.

[0029] Before welding, the crossbeam 2 is limited by the upper welding assembly 5, and the welding parts 503 are sleeved and fixed at the welding points at both ends of the crossbeam 2; the lower welding assembly 5 limits the main beam 1, and the welding parts 503 are sleeved and fixed at the welding points at both ends of the main beam 1; then the crossbeam 2 and the main beam 1 are spliced ​​according to the installation position and angle requirements, and at the same time, the pillars 3 are limited and moved one by one by the splicing assembly 6, so that they are spliced ​​at the welding points of the main beam 1; finally, the welder 504 of the upper welding assembly 5 welds the welding points between the main beam 1 and the crossbeam 2; the welder 504 of the lower welding assembly 5 welds the welding points between the main beam 1 and the pillars 3.

[0030] like Figure 4 As shown, the adjustment assembly 502 includes a mounting base 50201 located on the wall of the welding box 4; the lifting drive member 50202 is located on the mounting base 50201, driving the mounting frame 50203 to move up and down; the mounting frame 50203 is provided with a rotating frame 50204 driven to rotate by a rotating drive member; the rotating frame 50204 is provided with a bidirectional translation drive member 50205; the two sets of positioning members 501 are respectively connected to the driving ends of the bidirectional translation drive member 50205 through the mounting rod 50206.

[0031] It should be further explained that the lifting drive member 50202 is configured as multiple sets of lifting cylinders, which are used to drive the mounting frame 50203 to move up and down to adjust the distance between the crossbeam 2 and the main beam 1 so that the crossbeam 2 and the main beam 1 are in contact. The rotating drive member is configured as a motor mounted on the mounting frame 50203, and the motor drives the rotating frame 50204 to rotate. By synchronously rotating the upper and lower rotating frames 50204, the angles of the crossbeam 2 and the main beam 1 can be adjusted to meet the requirements of their installation angle inclination. The bidirectional translation drive member 50205 is configured as a double-headed bidirectional cylinder. By driving the mounting rod 50206 to move, the two sets of positioning members 501 can be moved, and the position of the positioning point can be adjusted to match the welding point.

[0032] like Figure 5-Figure 6 As shown, the positioning member 501 comprises two sets of positioning plates 50101, one above the other, arranged in parallel. One set of positioning plates 50101 is connected to a mounting rod 50206 on its corresponding side. An electrically controlled telescopic rod 50102 connects the two pairs of positioning plates 50101 at each end, forming a retractable frame-shaped positioning structure. Movable positioning rollers 50103 are mounted on opposite ends of the two pairs of positioning plates 50101. Multiple sets of welded components 503 are slidably mounted on either side of the two pairs of positioning plates 50101, communicating with the frame-shaped positioning structure and positioned between the two sets of positioning members 501.

[0033] It should be further explained that the multiple groups of movable positioning rollers 50103 rotate independently.

[0034] Before welding, workers place the ends of the crossbeams 2 onto the upper weldment 503, and the ends of the main beams 1 onto the lower weldment 503, one-to-one. By rotating the positioning rollers 50103 and sliding the weldment 503, the spacing between the crossbeams 2 and the spacing between the main beams 1 are adjusted to meet installation requirements. By further adjusting the spacing and angle of the two sets of positioning members 501, and using the electrically controlled telescopic rod 50102 to adjust the two sets of positioning plates 50101 to clamp the crossbeams 2 and main beams 1, the weldment 503 can be positioned at the welding point.

[0035] like Figure 7-Figure 8 As shown, the welding part 503 includes a welding ring 50301 slidably set on the positioning plate 50101; a through hole is reserved in the welding ring 50301 for the crossbeam 2 and the main beam 1 to pass through; the welder 504 rotates around the through hole along a circular rule for welding.

[0036] When the movable positioning roller 50103 drives the crossbeam 2 and the main beam 1 to move, the welding ring 50301 sleeved on the crossbeam 2 and the main beam 1 moves synchronously. After the position adjustment of the crossbeam 2 and the main beam 1 is completed, the welder 504 can weld around the crossbeam 2 and the main beam 1.

[0037] It should be further explained that a coaxial mounting ring 50305 is provided in the through hole; a circle of retractable positioning rods 50306 is provided on the inner ring of the mounting ring 50305 .

[0038] The positioning end of the positioning rod 50306 faces the center of the through hole; a telescopic cylinder is set in the mounting ring 50305 to drive the positioning rods 50306 to extend and retract one by one to position the crossbeam 2 and the main beam 1 in one step to prevent them from moving during the welding process.

[0039] It should be further explained that the outer periphery of the welding ring 50301 is provided with a gas collecting hood 50302 and a gas pump 50304. A gas collecting head 50303 is provided on the wall of the gas collecting hood 50302 and is connected to the gas pump 50304. The arrangement trajectory of the gas collecting head 50303 coincides with the movement trajectory of the welder 504.

[0040] The vacuum cylinder 50304 has a built-in vacuum pump and filter screen, which collects and filters the smoke and dust generated during the welding process at close range through the gas collecting head 50303, while accelerating the cooling.

[0041] It should be further explained that the welding ring 50301 is slidably connected to the positioning plate 50101 through the sliding rod 50307, ​​and the welding ring 50301 can move up and down along the sliding rod 50307.

[0042] It should be further explained that, the two sets of positioning plates 50101 are provided with slide grooves; the slide rods 50307 are set to slide up and down in the slide grooves; the upper and lower ends of the back side of the welding ring 50301 are respectively provided with screws 1 driven to rotate by a motor; the screw 1 is threadedly connected to the mounting block; the mounting block is connected to the slide rods 50307 one by one.

[0043] By moving the welding ring 50301 up and down, the spacing between the cross beam 2, the main beam 1 and the support 3 can be further adjusted, so that the three are firmly and stably spliced.

[0044] It should be further explained that the welder 504 includes a telescopic rod 1 50401 that is driven by a driving structure to rotate around a through hole and simultaneously rotate around an origin; a telescopic rod 2 50402 is arranged on the telescopic end of the telescopic rod 1 50401 and forms a bending structure with the telescopic rod 1 50401; and a welding head 50403 is arranged on the telescopic end of the telescopic rod 2 50402.

[0045] It should be further explained that a circular track is set on the outer periphery of the through hole, and the driving structure is composed of a motor, a gear and a ring gear; the telescopic rod 50401 is then driven by another motor to rotate on the gear, and finally realizes rotation around the through hole and rotation in place.

[0046] It should be further explained that the telescopic rod 2 50402 and the telescopic rod 1 50401 form an L-shaped structure, and the welding head 50403 realizes multi-directional welding through telescoping in two directions and two rotation modes.

[0047] like Figure 9-10 As shown, the bottom of the welding box 4 is provided with a mounting groove 401 ; the bottom of the limiting sleeve 601 is provided in the mounting groove 401 for movement forward, backward, left and right, and the top is open, and a locking member 602 is provided on the open portion.

[0048] It should be further explained that a sliding bar 603 that moves forward and backward is provided in the installation groove 401 ; the limiting sleeve 601 is slidably provided on the sliding bar 603 along the left-right direction.

[0049] It should be further explained that the sliding bar 603 is provided with a screw 2 604 which is driven to rotate by motor 1; the bottom of the limit sleeve 601 is connected to the screw 2 604 through a thread to achieve left and right translation; the groove wall of the mounting groove 401 is provided with a screw 3 605 which is driven to rotate by motor 2; the translation block 606 is threadedly connected to the screw 3 605 and is also connected to the sliding bar 603.

[0050] It should be further explained that the engaging member 602 includes a cylinder and an engaging head that is driven by the cylinder to telescopically move within the opening of the limiting sleeve 601.

[0051] When the pillar 3 is placed in the limiting sleeve 601 and fixed by the locking piece 602, it is moved forward, backward, left and right in the installation groove 401 to adjust the position to be opposite to the welding point of the main beam 1, and finally spliced ​​and welded.

[0052] Example 2: Based on the photovoltaic module bracket welding device in Example 1, this example proposes a photovoltaic module bracket welding method, the steps are as follows:

[0053] S1. Place the long and short pillars 3 into their corresponding limiting sleeves 601. After they are locked and fixed by the engaging members 602, the limiting sleeves 601 drive the corresponding pillars 3 to move forward, backward, left, and right in the mounting slots 401 until they reach the set position.

[0054] S2. The staff puts the two ends of the crossbeam 2 through the through holes on the upper welding piece 503 one by one, and puts the two ends of the main beam 1 into the through holes on the lower welding piece 503 one by one; by rotating the positioning roller 50103 and sliding the welding piece 503, the spacing between the crossbeams 2 and the spacing between the main beams 1 are adjusted, and the main beam 1 and crossbeam 2 are driven up and down by the lifting drive piece 50202 to adjust the spacing between the crossbeam 2 and the main beam 1; by synchronously rotating the upper and lower rotating frames 50204, the angle of the crossbeam 2 and the main beam 1 can be adjusted; by driving the installation rod 50206 to move, the two sets of positioning pieces 501 are driven to move along the main beam 1 and crossbeam 2, and the position of the welding piece 503 can be adjusted to match the welding point;

[0055] S3. Adjust the two sets of positioning plates 50101 to clamp and position the crossbeam 2 and the main beam 1; drive the positioning rod 50306 to extend and retract, and the welding ring 50301 to move up and down, to position the crossbeam 2 and the main beam 1;

[0056] S4, sequentially assembling the cross beam 2, main beam 1 and support column 3;

[0057] S5. The upper welding head 50403 welds the welding point between the crossbeam 2 and the main beam 1 by extending and retracting in two directions and rotating in two ways. The lower welding head 50403 welds the welding point between the support 3 and the main beam 1 by extending and retracting in two directions and rotating in two ways. During the welding process, the gas collecting head 50303 collects and filters the welding smoke at close range, while accelerating the cooling.

[0058] S6. The upper and lower welding parts 503 are removed from the ends of the main beam 1 and the cross beam 2. The staff releases the bottom clamping part 602 that is engaged with the limit of the formed bracket, and then the welded photovoltaic module bracket can be taken out.

[0059] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A photovoltaic module bracket welding device, characterized in that: include: The welding assembly (5) is provided with two groups of welding assemblies (5), which are respectively provided at the upper and lower parts of the welding box (4), and each group of welding assemblies (5) includes a retractable adjustment assembly (502) and two movable groups of positioning members (501); the spacing and the tilt angle of the two groups of positioning members (501) are adjusted by the adjustment assembly (502) on the corresponding side, and the spacing of the two groups of positioning members (501) on the upper and lower sides is adjustable and the positions are staggered; the welding members (503) are slidably provided on the positioning members (501), and the welding members (503) on the two groups of positioning members (501) on the upper sides are used to be sleeved and fixed at the welding points at both ends of the beam (2) in a one-to-one manner, and the welding members (503) on the two groups of positioning members (501) on the lower sides are used to be sleeved and fixed at the welding points at both ends of the main beam (1) in a one-to-one manner; the welder (504) is provided on the welding member (503); and a splicing assembly (6), wherein a plurality of splicing assemblies (6) are arranged around the lower welding assembly (5), and the support columns (3) are limited and moved one by one from the bottom through the limiting sleeve (601) so as to be spliced ​​at the welding point of the main beam (1); The welder (504) of the upper welding assembly (5) welds the welding points between the main beam (1) and the cross beam (2); the welder (504) of the lower welding assembly (5) welds the welding points between the main beam (1) and the support (3); The adjustment assembly (502) includes a mounting seat (50201) located on the wall of the welding box (4); a lifting drive member (50202) is located on the mounting seat (50201) and drives the mounting frame (50203) to move up and down; a rotating frame (50204) driven to rotate by a rotating drive member is provided on the mounting frame (50203); a bidirectional translation drive member (50205) is provided on the rotating frame (50204); two sets of positioning members (501) are respectively connected to the driving ends of the bidirectional translation drive member (50205) through mounting rods (50206); The positioning member (501) includes two sets of positioning plates (50101) arranged in parallel, one above the other; one set of positioning plates (50101) is connected to the mounting rod (50206) on the corresponding side; an electrically controlled telescopic rod (50102) is respectively connected to both ends of the two sets of positioning plates (50101) to form a telescopic frame-type positioning structure; movable positioning rollers (50103) are provided on the opposite ends of the two sets of positioning plates (50101); The plurality of welding members (503) are opposed to each other in pairs and are respectively slidably arranged on one side of the two paired positioning plates (50101), are connected to the frame-shaped positioning structure, and are simultaneously located between the two positioning members (501).

2. The photovoltaic module bracket welding device according to claim 1, characterized in that: The welding part (503) comprises a welding ring (50301) slidably arranged on a positioning plate (50101); a through hole is left inside the welding ring (50301) for the crossbeam (2) and the main beam (1) to pass through; and the welder (504) rotates around the through hole along a circular rule to perform welding.

3. The photovoltaic module bracket welding device according to claim 2, characterized in that: A coaxial mounting ring (50305) is provided in the through hole; a circle of retractable positioning rods (50306) is provided on the inner ring of the mounting ring (50305).

4. The photovoltaic module bracket welding device according to claim 2, characterized in that: A gas collecting hood (50302) is provided around the periphery of the welding ring (50301), and a gas extraction cylinder (50304) is also provided; a gas collecting head (50303) connected to the gas extraction cylinder (50304) is provided on the hood wall of the gas collecting hood (50302); the arrangement trajectory of the gas collecting head (50303) is consistent with the movement trajectory of the welder (504).

5. The photovoltaic module bracket welding device according to claim 2, characterized in that: The welding ring (50301) is slidably connected to the positioning plate (50101) via the sliding rod (50307), and the welding ring (50301) can move up and down along the sliding rod (50307).

6. The photovoltaic module bracket welding device according to claim 2, characterized in that: The welder (504) includes a telescopic rod (50401) driven by a driving structure to rotate around a through hole and simultaneously rotate around an origin; a telescopic rod (50402) is arranged on the telescopic end of the telescopic rod (50401) and forms a bending structure with the telescopic rod (50401); and a welding head (50403) is arranged on the telescopic end of the telescopic rod (50402).

7. The photovoltaic module bracket welding device according to claim 1, characterized in that: The bottom of the welding box (4) is provided with a mounting groove (401); the bottom of the limiting sleeve (601) is provided in the mounting groove (401) to move forward, backward, left and right, and the top is open, and a locking member (602) is provided on the open portion.

8. The photovoltaic module bracket welding device according to claim 7, characterized in that: A sliding bar (603) that moves forward and backward is provided in the installation groove (401); the limiting sleeve (601) is slidably provided on the sliding bar (603) along the left-right direction.

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