CN118123555A - Automatic feeding and discharging mechanism for real shaft parts - Google Patents

Abstract

The invention discloses an automatic feeding and discharging mechanism for real shaft parts, which comprises a hydraulic system, a feeding and discharging equipment body, truss manipulators, feeding and positioning mechanisms, feeding mechanisms, discharging mechanisms and safety guardrails, wherein the truss manipulators comprise a first manipulator and a second manipulator which are mutually independent, the first manipulator and the second manipulator can horizontally and vertically move, a pneumatic claw is arranged on the first manipulator, an electromagnet sucker is arranged on the second manipulator, a fine adjustment cylinder is fixed at the bottom end of the first manipulator, a movable support is fixed at the output shaft of the fine adjustment cylinder, the bottom end of the movable support is fixed with the pneumatic claw, and the pneumatic claws are arranged in four groups, and each group can grab a shaft-shaped workpiece. The safety guardrail is internally processed, so that the door opening and stopping effects can be achieved, the feeding and discharging can be automatically carried out, the efficiency is higher, the safety is higher, and the personal safety of operators is well protected.

Description

Automatic feeding and discharging mechanism for real shaft parts

Technical Field

The invention relates to the technical field of part machining, in particular to an automatic feeding and discharging mechanism for a real shaft part.

Background

The feeding and discharging device mainly realizes full automation of the machine tool manufacturing process, adopts an integrated processing technology, is suitable for feeding and discharging, workpiece overturning and workpiece sequencing of a production line, and is quite suitable for the condition that the product is single and the productivity is low by using a special machine or a manual feeding and discharging mode of the machine tool.

In the production process of short shaft parts at present, an automatic feeding and discharging manipulator is generally adopted for feeding and discharging, but the traditional automatic feeding and discharging manipulator is large in occupied area, complex in structure, inconvenient to maintain and low in automation degree, workers are required to participate in the processing process, certain potential safety hazards are caused, and labor intensity of the workers is easily increased.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides an automatic feeding and discharging mechanism for real shaft parts.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

A automatic unloading mechanism that goes up for real axle type part, includes hydraulic system, goes up unloading equipment body, truss manipulator, material loading positioning mechanism, feed mechanism, unloading mechanism and safety barrier, its characterized in that: the truss manipulator comprises a first manipulator and a second manipulator which are mutually independent, the first manipulator and the second manipulator can horizontally and vertically move, the first manipulator is provided with a pneumatic claw, and the second manipulator is provided with an electromagnet sucker.

Preferably, the bottom end of the first manipulator is fixed with a fine adjustment cylinder, an output shaft of the fine adjustment cylinder is fixed with a movable support, the bottom end of the movable support is fixed with pneumatic claw hands, the pneumatic claw hands are provided with four groups, each group can grasp a shaft-shaped workpiece.

Preferably, the hydraulic system, the feeding and discharging equipment body, the truss manipulator, the feeding positioning mechanism, the feeding mechanism and the discharging mechanism are all located in the safety barrier.

Preferably, the feeding positioning mechanism comprises a feeding positioner and a feeding frame, the feeding frame is placed in the feeding positioner, a positioning plate is arranged in the feeding positioner, one side of the positioning plate, which is far away from the feeding frame, is fixed with a plurality of guiding polished rods, one end of the guiding polished rods, which is far away from the positioning plate, is movably penetrated through the outside of the feeding positioner and is guided by a linear bearing, one side of the positioning plate, which is far away from the feeding frame, is fixed with a plurality of T-shaped screw rods, and one end of the T-shaped screw rod, which is far away from the positioning plate, is movably penetrated through the outside of the feeding positioner and is provided with T-shaped nuts.

Preferably, the feeding mechanism comprises a feeding frame, the top end of the feeding frame is fixed with a placing frame, the placing frame is obliquely arranged, a jacking cylinder is fixed on one side, which is positioned on the lower side of the placing frame, of the feeding frame, and a material jacking device is fixed on an output shaft of the jacking cylinder.

Preferably, the ejector comprises a plurality of ejector top sheets, wherein the top ends of the ejector top sheets are provided with ejector V-shaped notches.

Preferably, the top of putting the frame is equipped with fixed spacing and removal spacing respectively, removes spacing and removes the adjustment position through spacing cylinder drive, and spacing cylinder drive removes spacing and carries out the initial positioning of axle type part, remove spacing side and install the location cylinder, location cylinder drive carries out the accurate positioning of axle type part to spacing.

Preferably, a loading detector is fixed on one side of the top end of the loading frame, which is close to the feeder, and a loading detector is arranged on the movable limiting frame.

Preferably, the unloading mechanism comprises an unloading bearing frame, the unloading bearing frame is obliquely arranged, the unloading bearing frame is driven to lift through a lifting cylinder, the horizontal height of the unloading bearing frame, which is close to the upper unloading equipment body, is larger than that of the unloading bearing frame, which is far away from the upper unloading equipment body, a buffering blocking mechanism is arranged on one side of the unloading bearing frame, which is close to the upper unloading equipment body, a unloading blocking mechanism is arranged on one side of the unloading bearing frame, which is far away from the upper unloading equipment body, and a unloading tray is arranged below the unloading bearing frame.

Preferably, the blanking blocking mechanism comprises a right-angle blocking plate, the right-angle blocking plate is driven to move up and down through a blanking cylinder, and a position detector is further arranged on one side of the right-angle blocking plate.

Compared with the prior art, the invention has the beneficial effects that:

1. The hydraulic system, the feeding and discharging equipment body, the truss manipulator, the feeding positioning mechanism, the feeding mechanism and the discharging mechanism are all positioned in the safety barrier, the processing is performed in the safety barrier, the effect of opening the door and stopping the machine can be achieved, the feeding and discharging can be automatically performed, the efficiency is higher, the safety of operators is improved, and the personal safety of the operators is well protected;

2. Through the design of the feeding positioning mechanism, the positioning plate is moved left and right to enable the feeding positioning mechanism to move to a proper position, the position of the feeding frame can be limited through the positioning plate, the position of the positioning plate can be limited through the T-shaped nut, an operator pushes the feeding frame with the unprocessed workpiece placed to the position of the feeding positioning mechanism through the door of the safety barrier, and after the feeding positioning mechanism is completed, the door of the safety barrier is closed after the feeding positioning mechanism exits from the feeding area, so that the positioning is more accurate, and the electromagnet sucker can be ensured not to have errors in the material taking process;

3. Through the design of feed mechanism, the work piece is placed on the top of putting the frame through the electro-magnet sucking disc, closely put one deck, can roll towards the sizing ware because of gravity, be blocked by the sizing ware, through the position of adjusting the spacing, can change spacing between spacing and the putting frame, thereby can adapt to the work piece of various length and size, guarantee that the work piece can more orderly put on the putting frame, whether there is the material on the top of putting the frame through having the material detector to detect, when there is not the material, drive the electro-magnet sucking disc through the second manipulator and get the material, whether can detect the work piece on the measuring glassware and remove in place through the material detector, can lift up the work piece after removing in place, and grasp the work piece through pneumatic claw, degree of automation is high, and material loading efficiency is high;

4. Through the design of unloading mechanism, position detector adopts laser distance sensor, is placed by pneumatic claw hand at the work piece after the processing on unloading accepting frame top, reaches unloading through buffering and stopping mechanism after earlier and stops mechanism position, and the work piece is stopped by right angle baffle, can not the landing, during the unloading, drives unloading through lifting cylinder and accepts the frame and move down, and position detector detects and reaches the assigned position after, and the unloading cylinder drives right angle baffle and upwards moves for the work piece that processing was accomplished can the landing to the unloading tray on, thereby accomplish the unloading.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a perspective view of the present invention;

FIG. 5 is an enlarged detail view of the main view of the truss manipulator of the present invention;

FIG. 6 is an enlarged detail view of the left view of the truss manipulator of the present invention;

FIG. 7 is an enlarged detail view of a top view of the truss manipulator of the present invention;

FIG. 8 is a perspective view of a truss manipulator of the present invention;

FIG. 9 is an enlarged detail view of the main view of the feeding mechanism of the present invention;

FIG. 10 is a perspective view of a loading mechanism of the present invention;

FIG. 11 is an enlarged detail view of the left view of the feeding mechanism of the present invention;

FIG. 12 is a perspective view of the blanking mechanism of the present invention;

FIG. 13 is a right side view of the blanking mechanism of the present invention;

FIG. 14 is a front view of the blanking mechanism of the present invention;

FIG. 15 is a front view of the feed positioning mechanism of the present invention;

FIG. 16 is a top view of the feed positioning mechanism of the present invention;

FIG. 17 is a perspective view of the feed positioning mechanism of the present invention;

In the figure: the feeding and discharging device comprises a1 hydraulic system, a2 feeding and discharging device body, a 3 truss mechanical arm, a 301 first mechanical arm, a 302 second mechanical arm, a 3031 fine adjustment cylinder, a 3032 movable support, a 3033 pneumatic claw, a 304 electromagnet sucker, a 4 feeding and positioning mechanism, a 401 feeding frame, a 402 positioning plate, a 403 guiding polished rod, a 404 linear bearing, a 405 feeding and positioning device, a 406T-shaped screw rod, a 407T-shaped nut, a 5 feeding mechanism, a 501 feeding frame, a 502 placing frame, a 503 jacking cylinder, a 504 ejector, a 5041 jacking top sheet, a 5042 jacking V-shaped notch, a 505 limiting cylinder, a 5061 movable limiting frame, a 5062 fixed limiting frame, a 507 feeding detectors, a 509 positioning cylinder, a 6 feeding and discharging mechanism, a 601 discharging tray, a 602 lifting cylinder, a 603 feeding and receiving frame, a 604 feeding and receiving frame, a 605 right-angle baffle plate, a 606 feeding cylinder, a 607 position detector and a 7 safety fence.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1-17, an automatic loading and unloading mechanism for real shaft parts comprises a hydraulic system 1, a loading and unloading equipment body 2, a truss manipulator 3, a loading positioning mechanism 4, a loading mechanism 5, a unloading mechanism 6 and a safety barrier 7, and is characterized in that: the truss manipulator 3 comprises a first manipulator 301 and a second manipulator 302 which are mutually independent to each other, the first manipulator 301 and the second manipulator 302 can horizontally and vertically move, the first manipulator 301 is provided with a pneumatic claw 3033, and the second manipulator 302 is provided with an electromagnet sucker 304;

The hydraulic system 1 provides hydraulic force for the pneumatic assembly, a worker firstly sends unprocessed workpieces to a positioning mechanism of the feeding positioning mechanism 4, then drives the electromagnet chuck 304 to take materials through the second manipulator 302, the electromagnet chuck 304 can take a plurality of workpieces to be processed at one time and sends the workpieces to the feeding mechanism 5, then takes the materials from the feeding mechanism 5 through the first manipulator 301, can grasp two workpieces at one time through the pneumatic claw 3033, sends the workpieces to a processing area for processing, and then moves the workpieces to the position of the discharging mechanism 6 after the processing is completed, so that the processing is completed;

the hydraulic system 1, the feeding and discharging equipment body 2, the truss manipulator 3, the feeding positioning mechanism 4, the feeding mechanism 5 and the discharging mechanism 6 are all located in the safety barrier 7, processing is carried out inside the safety barrier 7, the effect of opening the door and stopping can be achieved, and personal safety of operators can be well protected.

Example 2

Referring to fig. 5-8, the difference between the present embodiment and embodiment 1 is that the bottom end of the first manipulator 301 is fixed with a fine tuning cylinder 3031, the output shaft of the fine tuning cylinder 3031 is fixed with a movable bracket 3032, the bottom end of the movable bracket 3032 is fixed with pneumatic fingers 3033, and the pneumatic fingers 3033 are provided with four groups, each group can grasp a shaft-shaped workpiece;

The workpiece to be machined can be stably clamped through the pneumatic claw 3033, and then the workpiece is conveyed to a machining station for machining, and the position of the workpiece can be adjusted through the fine adjustment cylinder 3031, so that the workpiece is subjected to auxiliary adjustment in the machining process.

Example 3

Referring to fig. 15-17, the difference between this embodiment and embodiment 1 is that the feeding positioning mechanism 4 includes a feeding positioner 405 and a feeding frame 401, the feeding frame 401 is placed in the feeding positioner 405, a positioning plate 402 is disposed in the feeding positioner 405, a plurality of guiding polished rods 403 are fixed on one side of the positioning plate 402 far away from the feeding frame 401, one end of the guiding polished rods 403 far away from the positioning plate 402 movably penetrates through the outside of the feeding positioner 405 and is guided by a linear bearing 404, a plurality of T-shaped lead screws 406 are fixed on one side of the positioning plate 402 far away from the feeding frame 401, and one end of the T-shaped lead screws 406 far away from the positioning plate 402 movably penetrates through the outside of the feeding positioner 405 and is provided with T-shaped nuts 407;

Through controlling the removal locating plate 402, make it remove to suitable position, can restrict the position of material loading frame 401 through locating plate 402, can restrict the position of locating plate 402 through T type nut 407, operating personnel will put the material loading frame 401 of unprocessed work piece and pass through the door propelling movement of safety barrier 7 to the material loading positioning mechanism 4 positions, withdraws from the door of material loading regional closed safety barrier 7 after accomplishing, the location is more accurate, can guarantee that electromagnet sucking disc 304 can not take place the mistake when getting the material.

Example 4

Referring to fig. 9-14, the difference between the present embodiment and embodiment 1 is that the feeding mechanism 5 includes a feeding frame 501, a placement frame 502 is fixed at the top end of the feeding frame 501, the placement frame 502 is obliquely arranged, a material ejection cylinder 503 is fixed on the feeding frame 501 at a side with a lower height of the placement frame 502, and a material ejector 504 is fixed on an output shaft of the material ejection cylinder 503;

the workpiece is placed on the top end of the placing rack 502 through the electromagnet sucker 304, and the workpiece is placed tightly as shown in fig. 10, rolls towards the material fixing device 504 due to gravity, and is blocked by the material fixing device 504.

Wherein, the ejector 504 comprises an ejector top piece 5041, the ejector top piece 5041 is provided with a plurality of ejector V-shaped notches 5042 at the top end of the ejector top piece 5041;

When the ejector cylinder 503 drives the ejector top piece 5041 to move downwards, the workpiece automatically slides into the ejector V-shaped notch 5042, the ejector V-shaped notch 5042 can only accommodate one workpiece, when the ejector cylinder 503 is lifted again, one workpiece can be lifted, the rest workpieces can be blocked, and then the lifted workpiece can be grabbed by the pneumatic claw 3033 for processing.

The top end of the placement frame 502 is respectively provided with a fixed limit frame 5062 and a movable limit frame 5061, the movable limit frame 5061 is driven to move by a limit cylinder 505 to adjust the position, the limit cylinder 505 drives the movable limit frame 5061 to perform initial positioning of shaft parts, a positioning cylinder 509 is arranged on the side edge of the movable limit frame 5061, and the positioning cylinder 509 is driven to the limit frame 5062 to perform fine positioning of the shaft parts;

Through the position of adjusting the movable limiting frame 5061, the distance between the movable limiting frame 5061 and the fixed limiting frame 5062 can be changed, so that the movable limiting frame can adapt to workpieces with various length sizes, and the workpieces can be placed on the placing frame 502 more orderly.

Wherein, a loading detector 508 is fixed on one side of the top end of the loading frame 501 near the material distributor 504, and a material detector 507 is installed on the moving limiting frame 5061;

The laser distance sensors are adopted by the loadable detector 508 and the loaded detector 507, so that whether a workpiece exists in the orientation direction or not can be detected;

whether the top end of the placing frame 502 is provided with a material or not can be detected by the material detector 507, when no material exists, the electromagnet sucker 304 is driven by the second manipulator 302 to take materials, whether the workpiece on the material fixer 504 moves in place can be detected by the material detector 508, the workpiece can be lifted up after moving in place, and the workpiece is grabbed by the pneumatic claw 3033.

Example 5

Referring to fig. 12-14, the difference between this embodiment and embodiment 1 is that the blanking mechanism 6 includes a blanking receiving frame 603, the blanking receiving frame 603 is obliquely disposed, the blanking receiving frame 603 is driven to lift by a lifting cylinder 602, the horizontal height of the blanking receiving frame 603 near the feeding and blanking device body 2 is greater than the horizontal height of the blanking receiving frame 603 far away from the feeding and blanking device body 2, a buffer blocking mechanism 604 is disposed on one side of the blanking receiving frame 603 near the feeding and blanking device body 2, a blanking blocking mechanism is disposed on one side of the blanking receiving frame 603 far away from the feeding and blanking device body 2, and a blanking tray 601 is disposed below the blanking receiving frame 603.

The blanking blocking mechanism comprises a right-angle blocking plate 605, the right-angle blocking plate 605 is driven to move up and down through a blanking cylinder 606, and a position detector 607 is arranged on one side of the right-angle blocking plate 605;

The position detector 607 adopts a laser distance sensor, a processed workpiece placed at the top end of the blanking receiving frame 603 by the pneumatic claw 3033 is buffered by the buffer blocking mechanism 604 and then reaches the position of the blanking blocking mechanism, the workpiece is blocked by the right-angle blocking plate 605 and cannot slide off, when blanking is carried out, the blanking receiving frame 603 is driven to move downwards by the lifting cylinder 602, after the position detector 607 detects that the specified position is reached, the blanking cylinder 606 drives the right-angle blocking plate 605 to move upwards, so that the processed workpiece can slide onto the blanking tray 601, and blanking is completed;

After the blanking tray 601 is full, the machine tool is stopped manually, an operator pulls out the blanking tray 601 filled with processed workpieces through a safety barrier door, and the empty blanking tray 601 is placed to close a protective door to wait for blanking.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The control mode of the invention is automatically controlled by the controller, the control circuit of the controller can be realized by simple programming of a person skilled in the art, the supply of power also belongs to common knowledge in the art, and the invention is mainly used for protecting a mechanical device, so the invention does not explain the control mode and circuit connection in detail.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (10)

1. A automatic unloading mechanism that goes up for real axle type part, includes hydraulic system (1), goes up unloading equipment body (2), truss manipulator (3), material loading positioning mechanism (4), feed mechanism (5), unloading mechanism (6) and safety barrier (7), its characterized in that: truss manipulator (3) are including first manipulator (301) and second manipulator (302) of mutually independent operation, but first manipulator (301) and second manipulator (302) all level and vertical removal, and install pneumatic claw hand (3033) on first manipulator (301), install electro-magnet sucking disc (304) on second manipulator (302).

2. The automatic loading and unloading mechanism for real shaft parts according to claim 1, wherein: the bottom end of the first manipulator (301) is fixed with a fine adjustment cylinder (3031), an output shaft of the fine adjustment cylinder (3031) is fixed with a movable support (3032), the bottom end of the movable support (3032) is fixed with a pneumatic claw hand (3033), the pneumatic claw hand (3033) is provided with four groups, two groups of pneumatic claw hands are arranged in pairs, and each group can grasp a shaft-shaped workpiece.

3. The automatic loading and unloading mechanism for real shaft parts according to claim 1, wherein: the hydraulic system (1), the feeding and discharging equipment body (2), the truss manipulator (3), the feeding positioning mechanism (4), the feeding mechanism (5) and the discharging mechanism (6) are all located in the safety barrier (7).

4. An automatic loading and unloading mechanism for real shaft parts according to claim 3, wherein: the feeding positioning mechanism (4) comprises a feeding positioner (405) and a feeding frame (401), the feeding frame (401) is placed in the feeding positioner (405), a positioning plate (402) is arranged in the feeding positioner (405), one side, far away from the feeding frame (401), of the positioning plate (402) is fixedly provided with a plurality of guiding polished rods (403), one end, far away from the positioning plate (402), of the guiding polished rods (403) movably penetrates through the outer portion of the feeding positioner (405) and is guided through a linear bearing (404), one side, far away from the feeding frame (401), of the positioning plate (402) is fixedly provided with a plurality of T-shaped screw rods (406), and one end, far away from the positioning plate (402), of the T-shaped screw rods (406) movably penetrates through the outer portion of the feeding positioner (405) and is provided with T-shaped nuts (407).

5. The automatic loading and unloading mechanism for real shaft parts according to claim 1, wherein: the feeding mechanism (5) comprises a feeding frame (501), a placing frame (502) is fixed at the top end of the feeding frame (501), the placing frame (502) is obliquely arranged, a jacking cylinder (503) is fixed on one side, which is lower in height, of the placing frame (502) on the feeding frame (501), and a jacking device (504) is fixed on an output shaft of the jacking cylinder (503).

6. The automatic loading and unloading mechanism for real shaft parts according to claim 5, wherein: the ejector (504) comprises an ejector top sheet (5041), a plurality of ejector top sheets (5041) are arranged, and ejector V-shaped notches (5042) are formed in the top ends of the ejector top sheets (5041).

7. The automatic loading and unloading mechanism for real shaft parts according to claim 5, wherein: the top of putting frame (502) is equipped with fixed spacing (5062) and removal spacing (5061) respectively, removes spacing (5061) and removes through spacing cylinder (505) drive and come the adjustment position, and spacing cylinder (505) drive removes spacing (5061) and carries out the initial positioning of axle type part, location cylinder (509) are installed to removal spacing (5061) side, and location cylinder (509) drive carries out the accurate positioning of axle type part to spacing (5062).

8. The automatic loading and unloading mechanism for real shaft parts according to claim 7, wherein: one side of the top end of the feeding frame (501) close to the feeder (504) is fixed with a feeding detector (508), and the movable limiting frame (5061) is provided with a feeding detector (507).

9. The automatic loading and unloading mechanism for real shaft parts according to claim 1, wherein: unloading mechanism (6) are including unloading accepting frame (603), unloading accepting frame (603) slope sets up, and unloading accepting frame (603) drive through lifting cylinder (602) goes up and down, the horizontal height that unloading accepting frame (603) is close to last unloading equipment body (2) is greater than the horizontal height that unloading accepting frame (603) kept away from last unloading equipment body (2), and unloading accepting frame (603) is close to one side of going up unloading equipment body (2) and is equipped with buffering and blocks mechanism (604), unloading accepting frame (603) is kept away from one side of going up unloading equipment body (2) and is equipped with unloading and blocks mechanism, the below that unloading accepted frame (603) is equipped with unloading tray (601).

10. The automatic loading and unloading mechanism for real shaft parts according to claim 9, wherein: the blanking blocking mechanism comprises a right-angle blocking plate (605), the right-angle blocking plate (605) is driven to move up and down through a blanking cylinder (606), and a position detector (607) is further arranged on one side of the right-angle blocking plate (605).