Conveying device for automobile steel plate machining

Abstract

The utility model discloses a conveying device for automobile steel plate processing, which comprises a base, a plurality of universal wheels are uniformly arranged on two sides of the bottom end of the base, the plurality of universal wheels are respectively arranged on a track in a sliding manner, the track can be flexibly arranged, the space occupation ratio is reduced while the automobile steel plate is conveyed, and the conveying efficiency is improved. The top end of the base is connected with a mounting table through a first telescopic rod, the top end of the mounting table is connected with a storage table through a first electric rotating disc, a plurality of anti-skid rubber pads are evenly arranged on the surface of the storage table, and face expanding mechanisms are movably arranged on the two sides of the storage table; a clamping mechanism is further arranged on the side, away from the storage table, of the face expanding mechanism, an anti-skid rubber pad is arranged to be matched with the clamping mechanism to guarantee that the automobile steel plates are kept stable in the transportation process, the steel plates are prevented from sliding off, and abrasion caused by rigid extrusion between the steel plates and the device is avoided by arranging a buffering pad on the basis that the steel plates are clamped. The automobile steel plate quality is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel plate component processing equipment, in particular to a conveying device for processing automobile steel plates. Background Art

[0002] Automotive steel sheet is one of the indispensable materials in the automobile production process. In the automobile manufacturing process, rolls of special automotive steel sheets are usually used, with thickness ranging from 1.0mm to 1.2mm. These rolls of steel sheets first need to be cut into plates of different sizes. After a trimming process, the steel materials of different sizes are distributed to various stamping machines for the next stamping process. The flat steel materials are reshaped by the stamping machine and pressed into various stamping parts on the car body.

[0003] The processing and conveying device for automobile steel plate parts is a conveyor line, which is mainly composed of a conveyor belt, a drive device, a support structure and a control system. It is used to convey automobile steel plate parts from one workstation to another to complete different processing procedures. However, the conveyor line has a long transportation route, which can easily lead to low transportation efficiency. In addition, the general conveyor line is large in size and occupies a large area, which will limit the layout of the factory and the design of the production line. At the same time, the conveyor line cannot flexibly adapt to steel plates of different types or sizes and has poor adaptability. Utility Model Content

[0004] In order to overcome the problems of low transportation efficiency and large floor space occupied by existing automobile steel plate conveying devices which are not conducive to production line layout, and the inability of the conveying line to flexibly adapt to the transmission of steel plates of different types or sizes, and the limitations of equipment use, the utility model provides a conveying device for automobile steel plate processing, which aims to optimize the structure of the conveying device, reduce the floor space occupied by the equipment so that the equipment can be suitable for a small working environment, and at the same time enable the conveying device to meet the requirements of efficient and stable transportation of steel plates of different sizes.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A conveying device for processing automobile steel plates, comprising a base, a plurality of universal wheels are evenly arranged on both sides of the bottom end of the base, and the plurality of universal wheels are respectively slidably arranged on rails, a plurality of first telescopic rods are evenly arranged on the top of the base, and a mounting platform is connected to one end of the plurality of first telescopic rods away from the base, a first electric turntable is arranged on the top of the mounting platform, a storage platform is arranged on the top of the first electric turntable, a plurality of anti-skid rubber pads are evenly arranged on the surface of the storage platform, and a surface expansion mechanism is movably arranged on both sides of the storage platform, and a clamping mechanism is also arranged on the side of the surface expansion mechanism away from the storage platform;

[0007] A support platform is also provided on one side of the top of the storage table, a second electric turntable is provided on the top of the support platform, and a moving mechanism is provided on the top of the second electric turntable.

[0008] Furthermore, the expansion mechanism includes a plurality of third telescopic rods, which are evenly arranged along the side of the storage table, and a first fixed block is connected to one end of the third telescopic rods away from the storage table. A flat plate is provided on the top of the first fixed block, and the top surface of the flat plate is flush with the top surface of the storage table.

[0009] Furthermore, the clamping mechanism includes a plurality of second fixed blocks, which are evenly arranged along a side of the first fixed block away from the third telescopic rod, and a vertical plate is provided on one side of the top of the plurality of second fixed blocks. A side of the vertical plate close to the storage table is elastically connected to a second mounting plate through a plurality of springs, and a buffer pad is provided on the side of the second mounting plate away from the spring.

[0010] Furthermore, a plurality of through holes are evenly arranged on the storage table, and a plurality of second telescopic rods are arranged at the bottom end of the storage table, a first mounting plate is fixed to the top of the plurality of second telescopic rods, a plurality of brackets are evenly arranged on both sides of the top of the first mounting plate, a cross bar is arranged between each two opposite brackets, a plurality of balls are movably sleeved on the plurality of cross bars, and the plurality of balls correspond to and fit with the through holes one by one.

[0011] Furthermore, a push plate is movably embedded at the bottom end of one side of the support platform close to the storage platform, and a plurality of fourth telescopic rods are arranged on the inner side wall of the support platform, and the movable ends of the plurality of fourth telescopic rods are connected to one side of the push plate.

[0012] Furthermore, the moving mechanism includes a mounting seat, the bottom end of the mounting seat is connected to the top of the second electric turntable, and a plurality of fifth telescopic rods are horizontally arranged at the top of one side of the mounting seat, a third mounting plate is provided at one end of the plurality of fifth telescopic rods away from the mounting seat, a sixth telescopic rod is vertically arranged downward at the bottom end of the third mounting plate, a connecting plate is provided at one end of the sixth telescopic rod away from the third mounting plate, an electromagnet is provided at the bottom end of the connecting plate, and auxiliary fixing components are also provided on both sides of the connecting plate.

[0013] Furthermore, the auxiliary fixing assembly includes a plurality of seventh telescopic rods, and the plurality of seventh telescopic rods are evenly arranged and horizontally disposed along the side of the connecting plate, and a third fixing block is disposed at one end of the plurality of seventh telescopic rods away from the connecting plate, and a fourth mounting plate is connected to one side of the bottom end of the third fixing block, and a side of the fourth mounting plate close to the electromagnet is evenly arranged in the horizontal direction and is provided with a plurality of vertical sliding grooves, and electric sliders are slidably disposed in the plurality of sliding grooves, and an end of the electric slider away from the sliding groove is connected to a support plate, and each adjacent two support plates are also connected by a cross plate.

[0014] Beneficial effects of the utility model:

[0015] (1) By movably installing the conveying device on the track, the utility model greatly reduces the volume of the equipment compared to the traditional conveyor belt. The conveying device moves between the working areas of different processes along the track set on the ground, which not only realizes the transportation of automobile steel plates but also reduces the space occupied, so that the device can be flexibly used even in a small working environment, thereby enhancing the practicality of the device;

[0016] (2) By setting anti-slip rubber pads on the surface of the storage table and cooperating with the clamping mechanism, the automobile steel plate can be kept stable during transportation to avoid the danger of the steel plate slipping. The elastic clamping and buffer pads in the clamping mechanism can ensure that the steel plate is clamped and avoid rigid extrusion between the device and wear, thereby ensuring that the quality of the automobile steel plate will not be reduced during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0021] Figure 4 This is a front sectional view of the utility model;

[0022] Figure 5 for Figure 4 A partial enlarged view of point C in the middle;

[0023] Figure 6 It is a side sectional view of the utility model.

[0024] In the figure: 1, base; 11, universal wheel; 12, first telescopic rod; 13, mounting table; 14, first electric turntable; 15, storage table; 151, through hole; 152, non-slip rubber pad; 153, second telescopic rod; 154, first mounting plate; 1541, bracket; 1542, cross bar; 1543, ball bearing; 155, expansion mechanism; 1551, third telescopic rod; 1552, first fixed block; 1553, flat plate; 156, clamping mechanism; 1561, second fixed block; 1562, vertical plate; 1563, spring; 1564, second mounting plate Mounting plate; 1565, buffer pad; 16, support table; 161, push plate; 162, fourth telescopic rod; 163, second electric turntable; 17, moving mechanism; 171, mounting seat; 172, fifth telescopic rod; 173, third mounting plate; 174, sixth telescopic rod; 175, connecting plate; 176, electromagnet; 177, auxiliary fixing assembly; 1771, seventh telescopic rod; 1772, third fixing block; 1773, fourth mounting plate; 1774, support plate; 1775, slide groove; 1776, electric slider; 1777, cross plate; 2, track. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-6 As shown, the utility model is a conveying device for automobile steel plate processing, comprising a base 1, a plurality of universal wheels 11 are evenly arranged on both sides of the bottom end of the base 1, and the plurality of universal wheels 11 are respectively slidably arranged on a track 2, and the track 2 can be flexibly arranged according to the distribution of factory equipment. By movably installing the conveying device on the track 2, compared with the traditional conveyor belt, the utility model greatly reduces the volume of the equipment, and the conveying device moves between the working areas of different processes along the track 2 arranged on the ground, which reduces the space occupied while realizing the transportation of automobile steel plates, so that the device can be flexibly used even in a small working environment, thereby enhancing the practicality of the device;

[0027] At the same time, a plurality of first telescopic rods 12 are evenly arranged on the top of the base 1, and one end of the plurality of first telescopic rods 12 away from the base 1 is connected to a mounting platform 13, and a first electric turntable 14 is arranged on the top of the mounting platform 13, and a storage platform 15 is arranged on the top of the first electric turntable 14, wherein the arrangement of the first telescopic rods 12 can drive the storage platform 15 to adjust the upper and lower positions, and when unloading, the storage platform 15 can be adjusted to be flush with the working surface of the next process by controlling the extension or shortening of the first telescopic rods 12 and the rotation of the first electric turntable 14, so as to facilitate the pushing of the automobile steel plate on the storage platform 15 to the working surface of the next process;

[0028] A plurality of anti-skid rubber pads 152 are evenly arranged on the surface of the storage table 15, and a surface expansion mechanism 155 is movably arranged on both sides of the storage table 15, and a clamping mechanism 156 is also arranged on the side of the surface expansion mechanism 155 away from the storage table 15. Specifically, the surface expansion mechanism 155 includes a plurality of third telescopic rods 1551, and the plurality of third telescopic rods 1551 are evenly arranged along the side of the storage table 15, and one end of the plurality of third telescopic rods 1551 away from the storage table 15 is connected to a first fixed block 1552, and a flat plate 1553 is arranged on the top of the first fixed block 1552, and the top surface of the flat plate 1553 is flush with the top surface of the storage table 15;

[0029] The setting of the surface expansion mechanism 155 enables the device to meet the needs of handling automobile steel plates of different sizes and dimensions. By controlling the movement of the third telescopic rod 1551, the size of the placement surface can be flexibly adjusted, breaking the limitations of the traditional conveyor line in use and improving the practicality of the device.

[0030] The clamping mechanism 156 includes a plurality of second fixing blocks 1561, which are evenly arranged along a side of the first fixing block 1552 away from the third telescopic rod 1551, and a vertical plate 1562 is provided on one side of the top of the plurality of second fixing blocks 1561. A side of the vertical plate 1562 close to the storage platform 15 is elastically connected to a second mounting plate 1564 through a plurality of springs 1563. A damping rod is sleeved inside the spring 1563. A buffer pad 1565 is provided on a side of the second mounting plate 1564 away from the spring 1563.

[0031] By arranging the anti-skid rubber pad 152 on the surface of the storage platform 15, and cooperating with the clamping mechanism 156, the automobile steel plate can be ensured to remain stable during transportation, avoiding the danger caused by the steel plate slipping. The elastic clamping and buffer pad 1565 in the clamping mechanism 156 ensure that the steel plate is clamped and avoids rigid extrusion between the device and wear, thereby ensuring that the quality of the automobile steel plate will not be reduced during transportation.

[0032] In order to facilitate material unloading, a plurality of through holes 151 are evenly opened on the storage table 15, and a plurality of second telescopic rods 153 are arranged at the bottom end of the storage table 15, a first mounting plate 154 is fixed to the top of the plurality of second telescopic rods 153, and a plurality of brackets 1541 are evenly arranged on both sides of the top of the first mounting plate 154, and a cross bar 1542 is arranged between each two opposite brackets 1541, and a plurality of balls 1543 are movably sleeved on the plurality of cross bars 1542, and the plurality of balls 1543 correspond to and fit with the through holes 151 one by one, and a support platform 16 is also provided on one side of the top end of the storage table 15, and a push plate 161 is movably embedded at the bottom end of one side of the support platform 16 close to the storage table 15, and a plurality of fourth telescopic rods 162 are arranged on the inner side wall of the support platform 16, and the movable ends of the plurality of fourth telescopic rods 162 are connected to one side of the push plate 161;

[0033] When the conveying device moves along the track 2 to the work surface of the next process, the second telescopic rod 153 can be driven to extend, thereby driving the first mounting plate 154 to move upward, so that the ball 1543 partially passes through the through hole 151 and is exposed on the surface of the storage table 15. On the one hand, the rise of the ball 1543 can lift the automobile steel plate and then separate from the anti-slip rubber pad 152. On the other hand, the rolling of the ball 1543 drives the automobile steel plate to move. At the same time, by driving the fourth telescopic rod 162, the push plate 161 moves toward the automobile steel plate and pushes the automobile steel plate until the automobile steel plate is transferred to the work surface of the next process.

[0034] A second electric turntable 163 is provided at the top of the support platform 16, and a moving mechanism 17 is provided at the top of the second electric turntable 163. The second electric turntable 163 is provided to facilitate the retrieval of automobile steel plates stacked in different directions, wherein the moving mechanism 17 includes a mounting seat 171, the bottom end of the mounting seat 171 is connected to the top of the second electric turntable 163, and a plurality of fifth telescopic rods 172 are horizontally provided at the top of one side of the mounting seat 171, a third mounting plate 173 is provided at one end of the plurality of fifth telescopic rods 172 away from the mounting seat 171, a sixth telescopic rod 174 is vertically downwardly provided at the bottom end of the third mounting plate 173, a connecting plate 175 is provided at one end of the sixth telescopic rod 174 away from the third mounting plate 173, an electromagnet 176 is provided at the bottom end of the connecting plate 175, and both ends of the connecting plate 175 are connected to the connecting plate 175. The side is also provided with an auxiliary fixing assembly 177, specifically, the auxiliary fixing assembly 177 includes a plurality of seventh telescopic rods 1771, the plurality of seventh telescopic rods 1771 are evenly arranged and horizontally arranged along the side of the connecting plate 175, and a third fixing block 1772 is provided at one end of the plurality of seventh telescopic rods 1771 away from the connecting plate 175, a fourth mounting plate 1773 is connected to one side of the bottom end of the third fixing block 1772, a side of the fourth mounting plate 1773 close to the electromagnet 176 is evenly arranged in the horizontal direction and provided with a plurality of vertical slide grooves 1775, electric sliders 1776 are slidably arranged in the plurality of slide grooves 1775, an end of the electric slider 1776 away from the slide groove 1775 is connected to a support plate 1774, and every two adjacent support plates 1774 are also connected by a transverse plate 1777;

[0035] Working principle:

[0036] During operation, the cut steel plate needs to be moved to the surface of the storage table 15 first. Before taking the material, it is necessary to control the extension of several third telescopic rods 1551 to ensure that the placement surface size is larger than the size of the steel plate, thereby ensuring the smooth placement of the steel plate. When taking the material specifically, first control the rotation of the second electric turntable 163, and at the same time control the movement of the fifth telescopic rod 172, thereby driving the moving mechanism 17 to rotate to the top of the steel plate that needs to be transported. After adjustment, drive the sixth telescopic rod 174 to extend downward. At the same time, the auxiliary fixing components 177 on both sides of the connecting plate 175 extend to the maximum extent. In the process of the sixth telescopic rod 174 being driven downward to extend, the power supply of the electromagnet 176 is turned on, so that the electromagnet 176 has adsorption ability. When the electromagnet 176 gradually descends until it contacts the automobile steel plate, its strong adsorption force fixes the automobile steel plate and the electromagnet 176 together. In order to avoid the automobile steel plate falling due to the reduced adsorption force of the electromagnet 176 caused by poor contact and the like, The steel plate 1774 is moved upward along the slide groove 1775 to ensure the stability of the steel plate during the transfer process and the safety of the device. After the material is taken out, the sixth telescopic rod 174 is controlled to be shortened so that the steel plate is higher than the position of the storage platform 15, and then the second electric turntable is controlled to rotate the moving mechanism 17 to the top of the storage platform 15, and then the sixth telescopic rod 174 is controlled to extend to drive the steel plate to move downward toward the storage platform 15. When the bottom of the steel plate contacts the storage platform 15, the power of the electromagnet 176 is controlled to be turned off so that the adsorption force disappears, and the seventh telescopic rods 1771 are controlled to extend to release the steel plate and complete the material discharge. The operation is repeated until a stack of steel plates is moved to the surface of the storage platform 15.

[0037] After placement, the third telescopic rod 1551 is controlled to shorten until the buffer pads 1565 on both sides are in interference contact with the side edges of the automobile steel plate to ensure the stability of the steel plate placement. After the material is taken, the conveying device loaded with the automobile steel plate is driven to move along the track to the work surface of the next process. By controlling the extension or shortening of the first telescopic rod 12 and the rotation of the first electric turntable 14, the storage table 15 is adjusted to be flush with the work surface of the next process. After alignment, the third telescopic rod 1551 is controlled to extend a short distance so that the buffer pads 1565 on both sides do not clamp the automobile steel plate. The second telescopic rod 153 is driven to extend, thereby driving the first mounting plate 154 to move upward, so that the ball 1543 partially passes through the through hole 151 and exposes the surface of the storage table 15. The rise of the ball 1543 can lift the automobile steel plate and then separate it from the anti-slip rubber pad 152. On the other hand, the rolling of the ball 1543 drives the automobile steel plate to move. At the same time, the fourth telescopic rod 162 is driven to move the push plate 161 toward the direction of the automobile steel plate, and the automobile steel plate is pushed so that the automobile steel plate is transferred to the work surface of the next process.

[0038] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, as well as a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A conveying device for processing automobile steel plates, comprising a base (1), It is characterized in that A plurality of universal wheels (11) are evenly arranged on both sides of the bottom end of the base (1), and the plurality of universal wheels (11) are respectively slidably arranged on the track (2); a plurality of first telescopic rods (12) are evenly arranged on the top end of the base (1); one end of the plurality of first telescopic rods (12) away from the base (1) is connected to a mounting platform (13); a first electric turntable (14) is arranged on the top end of the mounting platform (13); a storage platform (15) is arranged on the top end of the first electric turntable (14); a plurality of anti-slip rubber pads (152) are evenly arranged on the surface of the storage platform (15); and a surface expansion mechanism (155) is movably arranged on both sides of the storage platform (15); and a clamping mechanism (156) is also arranged on the side of the surface expansion mechanism (155) away from the storage platform (15); A support platform (16) is also provided on one side of the top of the storage platform (15), a second electric turntable (163) is provided on the top of the support platform (16), and a moving mechanism (17) is provided on the top of the second electric turntable (163).

2. A conveying device for processing automobile steel plates according to claim 1, It is characterized in that The surface expansion mechanism (155) comprises a plurality of third telescopic rods (1551), the plurality of third telescopic rods (1551) being evenly arranged along the side of the storage platform (15), the ends of the plurality of third telescopic rods (1551) away from the storage platform (15) being connected to a first fixed block (1552), the top of the first fixed block (1552) being provided with a flat plate (1553), the top surface of the flat plate (1553) being flush with the top surface of the storage platform (15).

3. A conveying device for processing automobile steel plates according to claim 2, It is characterized in that The clamping mechanism (156) comprises a plurality of second fixing blocks (1561), and the plurality of second fixing blocks (1561) are evenly arranged along a side of the first fixing block (1552) away from the third telescopic rod (1551), and a vertical plate (1562) is provided on one side of the top end of the plurality of second fixing blocks (1561), and a side of the vertical plate (1562) close to the storage table (15) is elastically connected to a second mounting plate (1564) through a plurality of springs (1563), and a buffer pad (1565) is provided on a side of the second mounting plate (1564) away from the spring (1563).

4. A conveying device for processing automobile steel plates according to claim 2, It is characterized in that A plurality of through holes (151) are evenly arranged on the storage platform (15), and a plurality of second telescopic rods (153) are arranged at the bottom end of the storage platform (15), a first mounting plate (154) is fixed to the top of the plurality of second telescopic rods (153), a plurality of brackets (1541) are evenly arranged on both sides of the top of the first mounting plate (154), a cross bar (1542) is arranged between each two opposite brackets (1541), a plurality of balls (1543) are movably sleeved on the plurality of cross bars (1542), and the plurality of balls (1543) correspond to and fit the plurality of through holes (151) one by one.

5. The conveying device for processing automobile steel plates according to claim 2, It is characterized in that A push plate (161) is movably embedded at the bottom end of one side of the support platform (16) close to the storage platform (15), and a plurality of fourth telescopic rods (162) are arranged on the inner side wall of the support platform (16), and the movable ends of the plurality of fourth telescopic rods (162) are connected to one side of the push plate (161).

6. A conveying device for processing automobile steel plates according to claim 2, It is characterized in that The moving mechanism (17) comprises a mounting seat (171), the bottom end of the mounting seat (171) is connected to the top end of the second electric turntable (163), and a plurality of fifth telescopic rods (172) are horizontally arranged at the top end of one side of the mounting seat (171), a third mounting plate (173) is arranged at one end of the plurality of fifth telescopic rods (172) away from the mounting seat (171), a sixth telescopic rod (174) is vertically arranged downward at the bottom end of the third mounting plate (173), a connecting plate (175) is arranged at one end of the sixth telescopic rod (174) away from the third mounting plate (173), an electromagnet (176) is arranged at the bottom end of the connecting plate (175), and auxiliary fixing components (177) are also arranged on both sides of the connecting plate (175).

7. A conveying device for processing automobile steel plates according to claim 6, It is characterized in that The auxiliary fixing assembly (177) comprises a plurality of seventh telescopic rods (1771), the plurality of seventh telescopic rods (1771) are evenly arranged and horizontally arranged along the side of the connecting plate (175), and a third fixing block (1772) is arranged at one end of the plurality of seventh telescopic rods (1771) away from the connecting plate (175), a fourth mounting plate (1773) is connected to one side of the bottom end of the third fixing block (1772), a side of the fourth mounting plate (1773) close to the electromagnet (176) is evenly arranged in the horizontal direction and is provided with a plurality of vertical sliding grooves (1775), electric sliders (1776) are slidably arranged in the plurality of sliding grooves (1775), the end of the electric slider (1776) away from the sliding groove (1775) is connected to a support plate (1774), and each adjacent two support plates (1774) are also connected by a transverse plate (1777).

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