Photovoltaic support connecting clamping seat

Abstract

The utility model discloses a photovoltaic support connection clamping seat, and relates to the technical field of photovoltaic panel installation. The clamping seat comprises a clamping seat main body, a support and a sliding groove, the clamping seat main body is provided with a rapid fixing mechanism and a clamping mechanism, a spring, a pressing plate, a rotating shaft, a limiting block and an inserting rod are arranged, when a photovoltaic panel is fixed, the clamping seat main body is used for assisting connection and fixation of the photovoltaic panel and the support, the clamping seat main body is pushed into the sliding groove firstly, and then the clamping seat main body is pushed into the sliding groove; a professional internal hexagonal wrench is inserted into the special-shaped hole to push the top plate and the pressing plate to move downwards to press and fix the photovoltaic panel, and after the photovoltaic panel moves downwards to the limit, the internal hexagonal wrench is rotated by 90 degrees to drive the rotating shaft to rotate by 90 degrees, so that the limiting block is fixed in the circular groove, and at the moment, the insertion rod smoothly penetrates through the clamping seat main body to fix the clamping seat main body at the corresponding position of the bracket; the fixing process is simple and fast, repeated rotating and tightening are not needed, the working difficulty of installation workers is reduced to a certain degree, and therefore the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic panel installation, in particular to a photovoltaic bracket connection clamping seat. Background Technique

[0002] A photovoltaic bracket is a special bracket designed to place, install, and fix solar panels in a solar power generation system. At present, the solar photovoltaic brackets commonly used in China are mainly divided into three types in terms of material: concrete brackets, steel brackets, and aluminum alloy brackets. Concrete brackets are mainly used in large-scale photovoltaic power stations. Due to their large self-weight, they can only be placed in the wild and areas with good foundations, but they have high stability and can support large-sized battery panels. Aluminum alloy brackets are generally used in the application of solar energy on the roofs of civil buildings. Aluminum alloy has the characteristics of corrosion resistance, light weight, and beautiful and durable, but its self-bearing capacity is low and it cannot be applied to solar power station projects. Steel brackets have stable performance, mature manufacturing processes, high bearing capacity, and simple installation, and are widely used in civil, industrial solar photovoltaics, and solar power stations.

[0003] When the existing photovoltaic brackets are in use, they usually fix the photovoltaic panels by means of installation holes or pressing blocks. Both of these installation methods require tightening with bolts to achieve fixation. When the installation workers turn the bolts, they need to rotate them many times, resulting in a relatively cumbersome installation process. At the same time, due to the different installation environments of photovoltaic panels, in some environments with external oscillations, such as traffic vibrations that may exist when the installation location is close to a busy road or railway, wind vibrations that exist in strong wind areas or when the roof area is large, and water surface fluctuations that exist in floating-mounted water photovoltaic panels, etc., the external oscillations in these environments will have a certain impact on the fastening bolts, thus affecting their fixing effect. Content of the Utility Model

[0004] Based on this, the purpose of the utility model is to provide a photovoltaic bracket connection clamping seat to solve the technical problems that when the existing photovoltaic brackets install and fix photovoltaic panels, the method of using bolts for fastening results in a relatively cumbersome installation process, and at the same time, the fixing effect of the fastening bolts is easily affected in the installation environment with external oscillations.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A photovoltaic bracket connection clamping seat, including a clamping seat main body, a bracket, and a sliding groove. A quick-fixing mechanism and a clamping mechanism are arranged on the clamping seat main body. The quick-fixing mechanism includes a sleeve, a top plate, a pressing plate, and a plug rod. A spring is arranged inside the sleeve. A rotating shaft is arranged inside the spring. A limiting block is arranged at the bottom of the rotating shaft. A limiting groove is opened at the bottom of the sleeve. A circular groove and a second through hole are opened on the clamping seat main body. A first through hole and a third through hole are opened on the bracket. A special-shaped hole is opened on the rotating shaft.

[0006] By adopting the above technical solution, by setting the card seat body, the bracket, the chute, and the quick-fixing mechanism, when installing the photovoltaic panel, it is not necessary to rotate and tighten the fixation multiple times, which reduces the work difficulty of the installation workers to a certain extent, realizes the quick installation and fixation of the photovoltaic panel, and improves the installation efficiency.

[0007] Further, the spring is fixedly connected to both the sleeve and the top plate, the rotating shaft is rotatably connected to the top plate, and the rotating shaft is fixedly connected to the limiting block.

[0008] By adopting the above technical solution, the spring fixes the sleeve and the top plate, so that after the limiting effect of the limiting block is released, the top plate and the pressing plate can be reset smoothly, and the pressing and fixing effect on the photovoltaic panel is released.

[0009] Further, the pressing plate has an inverted L-shaped structure, the pressing plate is fixedly connected to the insertion rod, there are two groups of the insertion rods, two insertion rods are provided in each group, and the two insertion rods are symmetrically arranged.

[0010] By adopting the above technical solution, the design of the inverted L-shaped structure of the pressing plate provides a larger contact area and better force transmission efficiency, and enhances the stability of the fixation of the photovoltaic panel.

[0011] Further, the limiting block is adapted to the limiting groove, the limiting groove is communicated with the circular groove, and the diameter of the circular groove is greater than the length of the longest end of the limiting groove.

[0012] By adopting the above technical solution, the adaptation design of the limiting block and the limiting groove ensures that the limiting block can pass through more smoothly when passing through the limiting groove.

[0013] Further, the first through hole, the second through hole and the third through hole are consistent, and the first through hole, the second through hole and the third through hole are all adapted to the insertion rod.

[0014] By adopting the above technical solution, the consistency of the three through holes and the adaptability to the insertion rod ensure the stable insertion of the insertion rod at different positions, and improve the versatility and interchangeability of the quick-fixing mechanism.

[0015] Further, an annular sleeve is arranged at the bottom of the top plate, the inner diameter of the annular sleeve is adapted to the outer diameter of the sleeve, a gasket is arranged at the bottom of the pressing plate, and the gasket is made of rubber material.

[0016] By adopting the above technical solution, the annular sleeve can be buckled on the outside of the top of the sleeve to enclose the spring inside the sleeve, so as to provide a more comprehensive protection for the spring in the use state of the photovoltaic panel.

[0017] Further, the engaging mechanism includes a first card slot, a second card slot, a top cover, and a groove. A wedge-shaped slot is provided on the top cover, a wedge-shaped block is arranged inside the wedge-shaped slot, and a latch is arranged at the bottom of the top cover.

[0018] By adopting the above technical solution, the engaging mechanism is provided. The top cover is used to block the special-shaped hole, and at the same time, the latch at the bottom of the top cover is stuck in the first card slot and the second card slot, which can prevent the displacement of the rotating shaft and the limiting block caused by external oscillation in the presence of external oscillation.

[0019] Further, a pull ring is arranged at the top of the wedge-shaped block. The pull ring is in a semi-circular structure. The wedge-shaped block is engaged and slid with the wedge-shaped slot, and the pull ring is fixedly connected with the wedge-shaped block.

[0020] By adopting the above technical solution, the pull ring is provided, which is convenient for pulling the pull ring during disassembly to drive the wedge-shaped block in the wedge-shaped slot to move upward, so as to remove the top cover.

[0021] Further, a plurality of latches are provided. The plurality of latches are distributed in a circular pattern. The first card slot and the second card slot are communicated, and the first card slot and the second card slot are adapted to the latches.

[0022] By adopting the above technical solution, the circular distribution of the plurality of latches provides a uniform locking force and ensures the stability of the fixing mechanism in all directions.

[0023] Further, the diameter of the top cover is adapted to the diameter of the groove, and the height of the top cover is greater than the depth of the groove.

[0024] By adopting the above technical solution, the matching design of the diameters of the top cover and the groove facilitates the smooth insertion of the top cover into the groove to block the special-shaped hole.

[0025] In summary, the present utility model mainly has the following beneficial effects:

[0026] 1. When fixing the photovoltaic panel, the present utility model sets a spring, a pressing plate, a rotating shaft, a limiting block, and a plug rod. The main body of the card seat is used to assist in connecting and fixing the photovoltaic panel to the bracket. First, the main body of the card seat is pushed into the sliding groove, and a professional hexagon wrench is inserted into the special-shaped hole to push the top plate and the pressing plate downward to press and fix the photovoltaic panel. When it moves to the limit, the hexagon wrench is rotated 90 degrees to drive the rotating shaft to rotate 90 degrees, so that the limiting block is fixed in the circular groove. At this time, the plug rod smoothly penetrates through the main body of the card seat and fixes it at the corresponding position of the bracket. The fixing process is simple and fast, without the need for multiple rotations and tightenings, which reduces the work difficulty of the installation workers to a certain extent and thus improves the work efficiency.

[0027] 2. The utility model blocks the special-shaped hole by setting a clamping block, a top cover, a wedge-shaped block and a pull ring. At the same time, the clamping block at the bottom of the top cover is stuck in the first clamping groove and the second clamping groove, which can prevent the displacement of the rotating shaft and the limiting block caused by external oscillation in the presence of external oscillation, ensuring that the quick-fixing mechanism always maintains a stable state. The setting of the wedge-shaped block and the pull ring facilitates pulling the pull ring during disassembly, driving the wedge-shaped block in the wedge-shaped groove to move upward, thereby removing the top cover and releasing its restriction on the quick-fixing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a top-down three-dimensional structural schematic diagram of the utility model;

[0029] Figure 2 is a front three-dimensional structural schematic diagram of the utility model;

[0030] Figure 3 is a partial side-sectional structural schematic diagram of the utility model;

[0031] Figure 4 is a partial front-sectional structural schematic diagram of the utility model;

[0032] Figure 5 For the utility model Figure 1 is an enlarged structural schematic diagram of part A in the utility model.

[0033] In the figure: 1, the main body of the card seat; 2, the bracket; 3, the chute; 4, the quick-fixing mechanism; 401, the sleeve; 402, the spring; 403, the top plate; 404, the annular sleeve; 405, the pressing plate; 406, the rotating shaft; 407, the limiting block; 408, the limiting groove; 409, the circular groove; 410, the special-shaped hole; 411, the insertion rod; 412, the first through hole; 413, the second through hole; 414, the third through hole; 5, the gasket; 6, the engaging mechanism; 601, the first clamping groove; 602, the second clamping groove; 603, the clamping block; 604, the top cover; 605, the wedge-shaped groove; 606, the wedge-shaped block; 607, the pull ring; 608, the groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0035] The following will describe the embodiments of the present utility model according to its overall structure. Embodiment

[0036] A photovoltaic bracket connecting card seat, as Figures 1 - 5As shown in the figure, it includes a card seat main body 1, a bracket 2 and a chute 3. A quick-fixing mechanism 4 and a clamping mechanism 6 are arranged on the card seat main body 1. The quick-fixing mechanism 4 includes a sleeve 401, a top plate 403, a pressing plate 405 and a plug rod 411. A spring 402 is arranged inside the sleeve 401. A rotating shaft 406 is arranged on the inner side of the spring 402. A limiting block 407 is arranged at the bottom of the rotating shaft 406. A limiting groove 408 is opened at the bottom of the sleeve 401. A circular groove 409 and a second through hole 413 are opened on the card seat main body 1. A first through hole 412 and a third through hole 414 are opened on the bracket 2. A special-shaped hole 410 is opened on the rotating shaft 406. By setting the card seat main body 1, the bracket 2 and the chute 3, as well as the quick-fixing mechanism 4, when installing the photovoltaic panel, there is no need to rotate and tighten the fixation multiple times, which reduces the work difficulty of the installation workers to a certain extent, realizes the quick installation and fixation of the photovoltaic panel, improves the installation efficiency. The setting of the special-shaped hole 410 makes it necessary to use tools such as a professional hexagon wrench to fix or disassemble the photovoltaic panel, which improves the safety of the quick-fixing mechanism 4 to a certain extent.

[0037] Refer to Figure 2 , Figure 4 The spring 402 is fixedly connected to both the sleeve 401 and the top plate 403. The rotating shaft 406 is rotatably connected to the top plate 403. The rotating shaft 406 is fixedly connected to the limiting block 407. By fixing the sleeve 401 and the top plate 403 with the spring 402, after the limiting effect of the limiting block 407 is released, the top plate 403 and the pressing plate 405 can be reset smoothly, and the pressing and fixing effect on the photovoltaic panel is released. The rotational connection between the rotating shaft 406 and the top plate 403 ensures that the rotating shaft 406 can rotate flexibly, so as to adjust the angle of the limiting block 407 fixed to it by using the rotating shaft 406.

[0038] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The pressing plate 405 has an inverted L-shaped structure. The pressing plate 405 is fixedly connected to the plug rod 411. There are two groups of plug rods 411. Each group of plug rods 411 has two. The two plug rods 411 are symmetrically arranged. The inverted L-shaped structure design of the pressing plate 405 provides a larger contact area and better force transmission efficiency, enhancing the stability of the fixation of the photovoltaic panel. The symmetrical arrangement of the plug rods 411 ensures that the plug rods 411 smoothly penetrate the card seat main body 1, fix it at the corresponding position of the bracket 2, and ensure the balanced force of the card seat main body 1 in different directions, improving the balance and stability of the overall structure.

[0039] Refer to Figure 4, the limiting block 407 is adapted to the limiting groove 408. The limiting groove 408 communicates with the circular groove 409. The diameter of the circular groove 409 is greater than the length of the longest end of the limiting groove 408. The adaptation design of the limiting block 407 and the limiting groove 408 ensures that the limiting block 407 can pass through more smoothly when passing through the limiting groove 408. The design of the diameter of the circular groove 409 provides sufficient movement space for the limiting block 407, ensuring the flexibility of the rotation of the limiting block 407 at this position.

[0040] Refer to Figure 3 , the first through hole 412, the second through hole 413 and the third through hole 414 are consistent. The first through hole 412, the second through hole 413 and the third through hole 414 are all adapted to the insertion rod 411. The consistency of the three through holes and their adaptability to the insertion rod 411 ensure the stable insertion of the insertion rod at different positions, improving the versatility and interchangeability of the quick-fixing mechanism 4. At the same time, this design simplifies the installation process, reduces the tools and accessories required for installation, and reduces the installation cost and maintenance difficulty.

[0041] Refer to Figure 2 , Figure 4 , a ring sleeve 404 is provided at the bottom of the top plate 403. The inner diameter of the ring sleeve 404 is adapted to the outer diameter of the sleeve 401. A gasket 5 is provided at the bottom of the pressing plate 405. The gasket 5 is made of rubber. The ring sleeve 404 can be buckled on the outside of the top of the sleeve 401 to enclose the spring 402 inside the sleeve 401, thereby providing a relatively comprehensive protection for the spring 402 in the use state of the photovoltaic panel. The gasket 5 is made of rubber, increasing the buffering and sealing performance when contacting the photovoltaic panel, protecting the surface of the photovoltaic panel and extending the service life. Embodiment

[0042] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , the engaging mechanism 6 includes a first clamping groove 601, a second clamping groove 602, a top cover 604 and a groove 608. A wedge-shaped groove 605 is provided on the top cover 604. A wedge-shaped block 606 is provided inside the wedge-shaped groove 605. A clamping block 603 is provided at the bottom of the top cover 604. The setting of the engaging mechanism 6 uses the top cover 604 to block the special-shaped hole 410. At the same time, the clamping block 603 at the bottom of the top cover 604 is stuck in the first clamping groove 601 and the second clamping groove 602, which can prevent the displacement of the rotating shaft 406 and the limiting block 407 caused by external oscillation in the presence of external oscillation. The setting of the wedge-shaped groove 605 and the wedge-shaped block 606 enables the wedge-shaped block 606 that is easily accessible by people near the outside to be removed from the wedge-shaped groove 605 after all the photovoltaic panels on the bracket 2 are installed, increasing the difficulty of removing the top cover 604 and further improving the safety of the clamping seat body 1 for fixing the photovoltaic panel on the bracket 2.

[0043] Refer to Figure 1 、 Figure 2 、 Figure 3 As shown in , , , , a pull ring 607 is provided at the top of the wedge block 606. The pull ring 607 has a semi-circular structure. The wedge block 606 is engaged and slidable with the wedge groove 605. The pull ring 607 is fixedly connected to the wedge block 606. The setting of the pull ring 607 facilitates pulling the pull ring 607 during disassembly, driving the wedge block 606 in the wedge groove 605 to move upward, so as to remove the top cover 604 and release its restriction on the quick-fixing mechanism 4. When installing and pressing the top cover 604, the pull ring 607 can also assist the installer's hand in grasping and applying force to the top cover 604.

[0044] Refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 As shown in , , , , , there are multiple clamping blocks 603. The multiple clamping blocks 603 are circumferentially distributed. The first clamping groove 601 and the second clamping groove 602 are communicated. The first clamping groove 601 and the second clamping groove 602 are adapted to the clamping blocks 603. The circumferential distribution of the multiple clamping blocks 603 provides a uniform locking force and ensures the stability of the fixing mechanism in all directions. The setting that the first clamping groove 601 and the second clamping groove 602 are communicated enables the clamping blocks 603 to be smoothly inserted into the first clamping groove 601 and the second clamping groove 602 to fix the position of the rotating shaft 406.

[0045] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown in , , , , , the diameter of the top cover 604 is adapted to the diameter of the groove 608, and the height of the top cover 604 is greater than the depth of the groove 608. The adapted design of the diameters of the top cover 604 and the groove 608 facilitates the top cover 604 to be smoothly inserted into the groove 608 to block the special-shaped hole 410. The height of the top cover 604 is slightly greater than the depth of the groove 608, which can ensure that the wedge groove 605 and the wedge block 606 are located above the groove 608, facilitating the removal of the wedge block 606 on the outer card seat body 1.

[0046] The implementation principle of the present utility model is as follows: First, fix the bracket 2 at the position where the photovoltaic panel needs to be installed, align the card seat body 1 with the sliding groove 3, drag the card seat body 1 to a suitable position, and place the corresponding photovoltaic panel; then, insert an inner hexagon wrench into the special-shaped hole 410 and push down forcefully. At this time, the top plate 403, the pressing plate 405, the rotating shaft 406, the limiting block 407 and the inserting rod 411 all move downward. The limiting block 407 continuously approaches and passes through the limiting groove 408 and enters the circular groove 409. The inserting rod 411 successively passes through the first through hole 412, the second through hole 413 and reaches the third through hole 414. While the top plate 403 moves downward, it squeezes the spring 402, making it contract smoothly. The annular sleeve 404 continuously approaches and buckles on the outside of the top of the sleeve 401 as the top plate 403 moves downward, enclosing the spring 402 inside the sleeve 401. After all components move downward to the limit, continue to apply a downward force and rotate the inner hexagon wrench 90 degrees to drive the rotating shaft 406 and the limiting block 407 to rotate 90 degrees. The longest end of the limiting block 407 is perpendicular to the longest end of the limiting groove 408, and the limiting block 407 abuts against the lower part of the limiting groove 408 to complete the fixation; finally, align the top cover 604 with the groove 608, and the clamping block 603 at its bottom aligns with the first clamping groove 601 and the second clamping groove 602, and cover the top cover 604 to complete the plugging of the special-shaped hole 410 and use the clamping block 603 to prevent the rotating shaft 406 and the limiting block 407 from shifting during use; when disassembly is required, pull the pull ring 607 to apply an upward force to the wedge-shaped block 606, driving the top cover 604 and the clamping block 603 to leave the groove 608, the first clamping groove 601 and the second clamping groove 602 respectively, and use the inner hexagon wrench to rotate the rotating shaft 406 90 degrees in the reverse direction again. After the longest end of the limiting block 407 is parallel to the longest end of the limiting groove 408, release the inner hexagon wrench. Under the action of the elastic restoring force of the spring 402, the pressing plate 405 and the gasket 5 at its bottom leave the surface of the photovoltaic panel, the limiting block 407 leaves the circular groove 409 and the limiting groove 408, and the inserting rod 411 leaves the third through hole 414, the second through hole 413 and the first through hole 412, and the photovoltaic panel can be removed. Then, drag the card seat body 1 out of the sliding groove 3 to complete the recovery of the card seat body 1.

[0047] Parts not involved in the present utility model are the same as or can be implemented by using the prior art, and will not be elaborated here.

[0048] Although embodiments of the present utility model have been shown and described, the specific embodiments are only explanations of the present utility model and are not limitations thereof. The specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions, and variations that do not make creative contributions to the embodiments as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A photovoltaic bracket connection socket, characterized in that: The invention comprises a card base body (1), a bracket (2) and a slide groove (3); the card base body (1) is provided with a quick fixing mechanism (4) and a locking mechanism (6); the quick fixing mechanism (4) comprises a sleeve (401), a top plate (403), a pressure plate (405) and an insertion rod (411); a spring (402) is provided inside the sleeve (401); a rotating shaft (406) is provided inside the spring (402); a limiting block (407) is provided at the bottom of the rotating shaft (406); a limiting groove (408) is provided at the bottom of the sleeve (401); a circular groove (409) and a second through hole (413) are provided on the card base body (1); a first through hole (412) and a third through hole (414) are provided on the bracket (2); and a special-shaped hole (410) is provided on the rotating shaft (406).

2. The photovoltaic bracket connection socket according to claim 1, characterized in that: The spring (402) is fixedly connected to the sleeve (401) and the top plate (403); the rotating shaft (406) is rotationally connected to the top plate (403); and the rotating shaft (406) is fixedly connected to the limit block (407).

3. The photovoltaic bracket connection socket according to claim 1, characterized in that: The pressing plate (405) is in an inverted L-shaped structure. The pressing plate (405) is fixedly connected to the insertion rods (411). Two groups of the insertion rods (411) are provided. Each group of the insertion rods (411) is provided with two insertion rods. The two insertion rods (411) are symmetrically arranged.

4. The photovoltaic bracket connection socket according to claim 1, characterized in that: The limiting block (407) is matched with the limiting groove (408), the limiting groove (408) is connected with the circular groove (409), and the diameter of the circular groove (409) is greater than the length of the longest end of the limiting groove (408).

5. The photovoltaic bracket connection socket according to claim 1, characterized in that: The first through hole (412), the second through hole (413) and the third through hole (414) are consistent with each other, and the first through hole (412), the second through hole (413) and the third through hole (414) are all compatible with the insertion rod (411).

6. The photovoltaic bracket connection socket according to claim 1, characterized in that: An annular sleeve (404) is provided at the bottom of the top plate (403), the inner diameter of the annular sleeve (404) being matched to the outer diameter of the sleeve (401), and a gasket (5) is provided at the bottom of the pressing plate (405), the gasket (5) being made of rubber.

7. The photovoltaic bracket connection socket according to claim 1, characterized in that: The locking mechanism (6) comprises a first locking groove (601), a second locking groove (602), a top cover (604) and a groove (608); a wedge-shaped groove (605) is provided on the top cover (604); a wedge-shaped block (606) is provided inside the wedge-shaped groove (605); and a locking block (603) is provided at the bottom of the top cover (604).

8. The photovoltaic bracket connection socket according to claim 7, characterized in that: A pull ring (607) is provided on the top of the wedge-shaped block (606), the pull ring (607) is in a semi-annular structure, the wedge-shaped block (606) is engaged and slidably moved with the wedge-shaped groove (605), and the pull ring (607) is fixedly connected to the wedge-shaped block (606).

9. The photovoltaic bracket connection socket according to claim 7, characterized in that: A plurality of the card blocks (603) are provided, and the plurality of the card blocks (603) are distributed in a circumferential manner; the first card slot (601) and the second card slot (602) are connected; and the first card slot (601) and the second card slot (602) are adapted to the card blocks (603).

10. The photovoltaic bracket connection socket according to claim 7, characterized in that: The diameter of the top cover (604) matches the diameter of the groove (608), and the height of the top cover (604) is greater than the depth of the groove (608).

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