A construction material handling device

Abstract

The present invention relates to the technical field of building material transportation, and particularly to a building material handling device, which includes a U-shaped frame. A vertically liftable lifting plate is slidably connected inside the frame. Two mounting plates are respectively slidably connected to both sides of the bottom of the lifting plate. At least two windows are opened on each mounting plate, and a vertically liftable lifting component is arranged in each window. The lifting component includes a clamping plate and a special-shaped support block. The clamping plate protrudes towards the center of the lifting plate from the window, and the special-shaped support block is located inside the window. Through the unique design of the lifting component, including the clamping plate and the rotatable special-shaped support block, the present invention realizes the stable lifting and separation of the plates, effectively avoiding the friction damage between the plates caused by the traditional horizontal sliding plate-taking method, and ensuring the appearance quality of the plates. Among them, the lifting plate adopts the design of a rotatable rotating plate, which can adapt to the inclined stacking situation of the plates, making the application scenario of the present invention wider.

Description

Technical Field

[0001] The present invention relates to the technical field of building material transportation, and in particular to a building material handling device. Background Art

[0002] In building construction, boards are a commonly used material when building houses. They are mainly used to construct components such as ceilings, floors, and walls. During building construction, the boards need to be manually carried to the construction site one by one. For large-area boards, it is often difficult for manual labor to carry them, and transportation devices are usually required for transportation.

[0003] When the existing board transportation devices transport boards, multiple boards need to be stacked for transportation. When manually retrieving boards, the upper board is usually separated from the board below it by means of translational sliding. For light boards or boards with textures, the boards are easily damaged due to mutual friction, which affects the appearance quality of the boards, and it is laborious and unsafe. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a building material handling device, aiming to achieve safe and automatic separation between multiple boards and low-loss transfer, and to ensure the appearance quality of the boards.

[0005] Technical Solution: A building material handling device includes a U-shaped frame. An elevator plate that can vertically lift is slidably connected inside the frame. Two mounting plates are respectively slidably connected to both sides of the bottom of the elevator plate. Both of the two mounting plates can perform reciprocating lateral movements relative to the center line of the elevator plate. At least two windows are opened on each mounting plate, and a lifting component that can vertically lift is arranged in each window. The lifting component includes a clamping plate and a special-shaped support block. The clamping plate protrudes towards the center of the elevator plate from the window, and the special-shaped support block is located inside the window. It can rotate towards the center of the elevator plate and protrude outside the window and protrude below the clamping plate. A plurality of wedge-shaped support blocks are elastically connected to the opposite sides of the two mounting plates. The wedge-shaped support blocks are located in the upper part of the window in the vertical direction. A push plate is slidably connected to the bottom of the elevator plate and between the two mounting plates. The push plate can perform reciprocating longitudinal movements along the center line of the elevator plate. The bottom surface of the push plate is slightly higher than the top surface of the wedge-shaped support block. A plurality of rollers are connected to the bottoms of both ends of the frame.

[0006] Furthermore, the lifting component further includes a U-shaped sliding frame. The sliding frame is slidably connected inside the window. The opening of the sliding frame faces the center of the elevator plate. The clamping plate is fixedly connected to the upper part of one side of the opening of the sliding frame. A rotating shaft is rotatably connected inside the sliding frame. The special-shaped support block is fixedly connected to the rotating shaft. A first worm gear is also fixedly connected to the rotating shaft. A first motor is installed on the side of the sliding frame背离 its opening. A first worm is rotatably connected inside the sliding frame. The first worm is in transmission connection with the first motor, and the first worm meshes with the first worm gear. [[ID=%]]

[0007] Furthermore, linear module 1 is installed on both sides of the frame, and the two ends of the lifting plate are respectively connected to the two linear modules 1 for transmission. Linear modules 2 are installed on both sides of the bottom of the lifting plate, and the two mounting plates are respectively connected to the two linear modules 2 for transmission. Linear module 3 is installed on the side of the two mounting plates away from each other and corresponding to each window, and each sliding frame is connected to the corresponding linear module 3 for transmission. Linear module 4 is installed along the center line of the bottom of the lifting plate, and the push plate is connected to the linear module 4 for transmission.

[0008] Furthermore, a slide groove 1 is opened on the opposite sides of the two mounting plates, the wedge-shaped support block is slidably connected in the slide groove 1, and a plurality of elastic members 1 are connected between the wedge-shaped support block and the inner side wall of the slide groove 1.

[0009] Furthermore, a mounting groove is provided on the wedge-shaped support block, and a plurality of rollers are rotatably connected in the mounting groove. The rollers are arranged in a straight line array, wherein the tops of the roller arrays all protrude out of the mounting groove.

[0010] Furthermore, the two mounting plates are provided with accommodating grooves on the opposite sides, and an infrared transmitter and an infrared receiver are respectively installed in the two accommodating grooves. The height of the accommodating grooves is parallel to the lowest position that the splint can reach relative to the window. The infrared receiver is used to receive the infrared light emitted by the infrared transmitter. A controller is installed on the outer side of the upper part of the rack. The controller is used to control the start and stop of various electric components of the device. The infrared transmitter and the infrared receiver are both electrically connected to the controller.

[0011] Furthermore, the lifting plate includes two connecting plates and a rotating plate. The rotating plate is rotatably connected between the two connecting plates. The two connecting plates are respectively connected to the two linear modules for transmission. The two mounting plates are slidably connected to the bottom of the rotating plate. The rotating plate is respectively fixed with worm gear 2 at both axial ends. Both connecting plates are rotatably connected with worm gear 2 that meshes with worm gear 2. Motor 2 is installed on both connecting plates, and the output shaft of motor 2 is connected to worm gear 2 for transmission.

[0012] Furthermore, a fixed plate is connected between one side of the bottom of both ends of the frame, and two slide grooves are symmetrically opened on the inner side of the fixed plate. Wedge-shaped clamping rods are slidably connected in the two slide grooves, and two elastic parts are connected between the wedge-shaped clamping rods and the inner wall of the two slide grooves. Scale bars are provided on the inner side of the fixed plate and below each of the two slide grooves.

[0013] Beneficial effects: The present invention realizes smooth lifting and separation of plates through a unique lifting component design, including a splint and a rotatable special-shaped support block, effectively avoiding friction damage between plates caused by the traditional translation and sliding plate removal method, and ensuring the appearance quality of the plates. Among them, the lifting plate adopts a rotatable rotating plate design, which can adapt to the inclined stacking of plates, making the application scenarios of the present invention more extensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the installation structure of the mounting plate and the push plate of the present invention.

[0016] Figure 3 This is a schematic diagram of the installation structure of the linear module 2, the sliding frame and the mounting plate of the present invention.

[0017] Figure 4 This is a schematic diagram of the installation structure of the wedge-shaped support block of the present invention.

[0018] Figure 5 It is a three-dimensional structural cross-sectional view of the lifting assembly of the present invention.

[0019] Figure 6 This is a sectional view of the three-dimensional structure of the mounting plate of the present invention.

[0020] Figure 7 It is a schematic diagram of the three-dimensional structure of the special-shaped support block of the present invention protruding outward from the splint after rotation.

[0021] Explanation of the accompanying drawings: 1-frame, 2-lifting plate, 201-rotating plate, 202-connecting plate, 3-mounting plate, 301-window, 302-slide groove 1, 303-accommodating groove, 401-clamping plate, 402-special-shaped support block, 403-sliding frame, 404-rotating shaft, 405-worm gear 1, 406-motor 1, 407-worm gear 1, 5-wedge-shaped support block, 501-elastic member 1, 502-mounting groove, 503-roller, 6-push plate, 7-linear module 1, 8-linear module 2, 9-linear module 3, 10-linear module 4, 11-roller, 1201-worm gear 2, 1202-worm gear 2, 1203-motor 2, 13-controller, 1401-wedge-shaped clamping rod, 1402-fixed plate, 1403-elastic member 2, 1404-scale bar. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1-Figure 7, a building material handling device, including a U-shaped frame 1. A vertically liftable lifting plate 2 is slidably connected inside the frame 1. Two mounting plates 3 are respectively slidably connected to both sides of the bottom of the lifting plate 2. Both of the two mounting plates 3 can perform reciprocating lateral movement relative to the center line of the lifting plate 2. Two windows 301 are opened on each mounting plate 3. A lifting component capable of vertical lifting is arranged in each window 301. The lifting component includes a clamping plate 401 and a special-shaped support block 402. The clamping plate 401 protrudes towards the center of the lifting plate 2 out of the window 301. The vertical height of the clamping plate 401 is close to the vertical height of the plate to be handled, so that the clamping plate 401 can only clamp one plate at a time. The distance that the clamping plate 401 protrudes out of the window 301 is 2 cm. And for the clamping plates 401 on both sides of the center line of the lifting plate 2, rubber anti-slip layers are arranged on their opposite sides to enhance the clamping stability. The special-shaped support block 402 is located inside the window 301. Its distal end has a support plane. The special-shaped support block 402 can rotate towards the center of the lifting plate 2 and protrude out of the window 301 so that its support plane protrudes out of the lower part of the clamping plate 401. Three wedge-shaped support blocks 5 are elastically connected to the opposite sides of both mounting plates 3. The three wedge-shaped support blocks 5 on each mounting plate 3 are distributed alternately with the two windows 301 on it. The wedge-shaped support blocks 5 are located in the upper part of the window 301 vertically. The top surface of the wedge-shaped support block 5 can support the plate. The lower part of the wedge-shaped support block 5 has an inclined surface, and its inclined surface gradually rises towards the center of the lifting plate 2. When the plate moves upward, the plate can come into contact and cooperation with the inclined surface of the wedge-shaped support block 5, so that the wedge-shaped support block 5 does not hinder the upward movement of the plate. A push plate 6 is slidably connected at the bottom of the lifting plate 2 and between the two mounting plates 3. The push plate 6 can perform reciprocating longitudinal movement along the center line of the lifting plate 2. The bottom surface of the push plate 6 is slightly higher than the top surface of the wedge-shaped support block 5 to facilitate the effective pushing of the plate supported by the wedge-shaped support block 5. A plurality of rollers 11 are connected to the bottom of both ends of the frame 1 to facilitate the movement and transfer of this device.

[0024] In the first embodiment, the lifting component further includes a U-shaped sliding frame 403. The sliding frame 403 is slidably connected within the window 301. The opening of the sliding frame 403 faces the center of the lifting plate 2. The clamping plate 401 is fixedly connected to the upper part of one side of the opening of the sliding frame 403. A rotating shaft 404 is rotatably connected within the sliding frame 403. The special-shaped support block 402 is fixedly connected to the rotating shaft 404. A first worm gear 405 is also fixedly connected to the rotating shaft 404. A first motor 406 is installed on one side of the sliding frame 403 away from its opening. A first worm 407 is rotatably connected within the sliding frame 403. The first worm 407 is in transmission connection with the first motor 406. The first worm 407 meshes with the first worm gear 405. By driving the first worm 407 to rotate through the first motor 406, and then through the meshing effect of the first worm 407 and the first worm gear 405, the rotating shaft 404 and the special-shaped support block 402 thereon are driven to rotate. After the special-shaped support block 402 rotates and protrudes out of the lower part of the outer side of the clamping plate 401, it can lift the plate clamped by the clamping plate 401. Due to the self-locking property of the transmission between the first worm 407 and the first worm gear 405, the effectiveness of the special-shaped support block 402 in lifting the plate is ensured, and further, when the plate contacts the inclined surface of the wedge-shaped support block 5, the upward movement of the plate is stable.

[0025] In order to drive the precise movement of the lifting plate 2, the mounting plate 3, the sliding frame 403 and the pushing plate 6, in the first embodiment, linear modules one 7 are installed on both sides of the frame​​​​​​​

[0028] In order to realize the automatic operation of the device, in this embodiment 1, the two mounting plates 3 are provided with a receiving groove 303 on the opposite sides, and the two receiving grooves 303 are respectively installed with an infrared transmitter and an infrared receiver. The receiving groove 303 is located at a height of the mounting plate 3 and is parallel to the lowest position that the splint 401 can reach relative to the window 301. The infrared light emitted by the infrared transmitter is directed toward the infrared receiver. These infrared rays form a detection area for detecting whether the splint 401 has reached the position of the uppermost plate. A controller 13 is installed on the outer side of the upper part of the frame 1. The controller 13 is used to control the start and stop of various electric components of the device. The infrared transmitter and the infrared receiver are both electrically connected to the controller 13.

[0029] The working principle of this embodiment 1 is as follows: initially, the controller 13 controls the linear module 1 7 to drive the lifting plate 2 to rise to the highest position, the controller 13 controls the linear module 2 8 to drive the mounting plates 3 on both sides to move away from each other to the maximum spacing, the controller 13 controls the linear module 3 9 to drive the sliding frame 403 to descend to the lowest part of the window 301, the controller 13 controls the motor 1 406 to drive the special-shaped support block 402 to reset to the window 301 and maintain the storage state, the controller 13 controls the linear module 4 10 to drive the push plate 6 to remain at the bottom rear side of the lifting plate 2, and the operator places the stacked plates directly under the lifting plate 2 through an external transport tool. More specifically, the stacked plates are supported by a pad whose transverse width is slightly smaller than the transverse width of the plates, and the height of the pad is at least greater than the minimum distance between the bottom surface of the mounting plate 3 and the top surface of the clamping plate 401, to ensure that the bottom plate can be clamped by the clamping plate 401.

[0030] Subsequently, the controller 13 controls the linear module 1 7 to drive the lifting plate 2 to descend until the infrared transmitter and the infrared receiver descend to the vertical center of the uppermost plate. During this process, the uppermost plate will gradually block all infrared light, causing the intensity of the light received by the infrared receiver to weaken or disappear completely. The infrared receiver converts this change into an electrical signal and transmits it to the controller 13. The controller 13 judges and processes it according to a preset logical algorithm to ensure that the vertical center of the splint 401 is parallel to the vertical center of the uppermost plate. Then, the controller 13 controls the linear module 2 8 to drive the mounting plates 3 on both sides to move closer to each other. The clamping plates 401 on both sides are moved to clamp the uppermost plate, and then the controller 13 controls the linear module 7 to drive the lifting plate 2 to rise to an appropriate height, so that a convex space of the special-shaped support block 402 is reserved between the uppermost plate and the plate below it. Then, the controller 13 controls the motor 406 to drive the worm 407 to rotate, and the worm 407 drives the worm gear 405 to rotate. The worm gear 405 drives the special-shaped support block 402 to rotate toward one side of the plate through the rotating shaft 404, so that the supporting surface of the special-shaped support block 402 contacts the bottom surface of the plate, thereby lifting the plate. Subsequently, the controller 13 controls the linear module 3 9 drives the sliding frame 403 to rise in the window 301, and the special-shaped support block 402 and the clamping plate 401 jointly drive the plate to rise until the bottom surface of the plate comes above the top surface of the wedge-shaped support block 5. During this process, the top of the plate contacts the lower inclined surface of the wedge-shaped support block 5, causing the wedge-shaped support block 5 to move away from the plate and compress the elastic member 1 501. When it moves from the bottom surface of the plate to the top surface of the wedge-shaped support block 5, the wedge-shaped support block 5 automatically pops outward from the slide groove 1 302 under the elastic action of the elastic member 1 501 to reset, so that the plate can be supported by the wedge-shaped support block 5 at this time. Subsequently, the linear module 2 8 is driven by the controller 13 The mounting plates 3 on both sides are moved away from each other by a certain distance, so that the clamping plates 401 on both sides release the clamping of the plate and keep the wedge-shaped support block 5 supporting the plate. Then, the controller 13 controls the linear module three 9 to drive the sliding frame 403 to move down and reset. At the same time, the controller 13 controls the motor one 406 to drive the worm one 407 to reverse, so that the special-shaped support block 402 is reset to the window 301 and maintains the storage state again. Subsequently, the controller 13 controls the linear module four 10 to drive the push plate 6 to push the plate to the outer front side of the frame 1, so that the operator can easily and completely remove a single plate, effectively reducing the appearance damage rate of the plate.

[0031] Example 2: Based on Example 1, please refer to Figure 1-Figure 7, a building material handling device, in order to adapt to the inclined stacking of plates, in this embodiment 2, the lifting plate 2 includes two connecting plates 202 and a rotating plate 201, the rotating plate 201 is rotatably connected between the two connecting plates 202, the two connecting plates 202 are respectively connected to the two linear modules 7 for transmission, the two mounting plates 3 are slidably connected to the bottom of the rotating plate 201, and the axial ends of the rotating plate 201 are respectively fixed with worm gears 1201, and the two connecting plates 202 are rotatably connected with worm gears 1202 that mesh with the worm gears 1201. Motors 1203 are installed on the two connecting plates 202, and the output shaft of the motor 1203 is connected to the worm gear 1202 for transmission. The motor 1203 is controlled by the controller 13 to drive the worm gear 12 02 rotates, so that the worm gear 2 1201 rotates under the meshing action with the worm gear 2 1202, so that the rotating plate 201 can rotate to a state parallel to the tilted stacked plates, so that the clamping plate 401 can adapt to the tilt of the plates and clamp them stably. After the controller 13 controls the linear module 1 7 to drive the lifting plate 2 to rise to an appropriate height, so that the convex space of the special-shaped support block 402 is reserved between the top plate and the plate below it, the controller 13 controls the motor 2 1203 to drive the worm gear 2 1202 to rotate in the opposite direction, so that the rotating plate 201 can rotate in the opposite direction to the horizontal state when the worm gear 2 1201 is meshing with the worm gear 2 1202, so that the plates clamped by the clamping plate 401 can rotate synchronously to the horizontal state.

[0032] Example 3: Based on Example 2, please refer to Figure 1-Figure 7, a building material handling device, in order to enable the stacked plates to be quickly placed directly under the lifting plate 2, in this embodiment 3, a fixed plate 1402 is connected between one side of the bottom of both ends of the frame 1, and a second slide groove is symmetrically opened on the inner side of the fixed plate 1402. A wedge-shaped clamping rod 1401 is slidably connected in the second slide groove, and a second elastic member 1403 is connected between the wedge-shaped clamping rod 1401 and the inner wall of the second slide groove. The front parts of the two facing sides of the two wedge-shaped clamping rods 1401 have inclined surfaces. When the inclined surface of the wedge-shaped clamping rod 1401 is subjected to a force toward one side of the fixed plate 1402, its inclined surface can disperse the force and make it overcome the elastic force of the second elastic member 1403 to move away from the center of the frame 1, and the elastic member The second 1403 provides a reset force for the wedge-shaped clamping rod 1401. A scale bar 1404 is provided on the inner side of the fixed plate 1402 and below each slide groove. The operator places the stacked plates directly below the lifting plate 2 through an external transfer tool. The stacked plates are supported by the pad. More specifically, during the movement of the pad toward the fixed plate 1402, the two ends of the pad respectively contact the inclined surfaces of the two wedge-shaped clamping rods 1401 and push the two wedge-shaped clamping rods 1401 away from each other. By observing the moving distance indicated by the scale bar 1404 on the same side of the two wedge-shaped clamping rods 1401 and making the two equal in size, it is possible to ensure that the stacked plates are directly below the lifting plate 2.

[0033] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

Claims

1. A construction material handling device, characterized in that: It includes a U-shaped frame (1). Inside the frame (1), there is a lifting plate (2) that is slidably connected and can vertically lift. On both sides of the bottom of the lifting plate (2), there are two mounting plates (3) slidably connected respectively. The two mounting plates (3) can both perform reciprocating lateral movements relative to the center line of the lifting plate (2). At least two windows (301) are opened on each mounting plate (3). In each window (301), there is a lifting component that can vertically lift. The lifting component includes a clamping plate (401) and a special-shaped support block (402). The clamping plate (401) protrudes towards the center of the lifting plate (2) from the window (301). The special-shaped support block (402) is located inside the window (301), and it can rotate towards the center of the lifting plate (2) and protrude out of the window (301) and protrude outside the lower part of the clamping plate (401). On the opposite sides of the two mounting plates (3), there are multiple wedge-shaped support blocks (5) elastically connected. The wedge-shaped support blocks (5) are vertically located above the window (301). At the bottom of the lifting plate (2) and between the two mounting plates (3), there is a push plate (6) slidably connected. The push plate (6) can perform reciprocating longitudinal movements along the center line of the lifting plate (2). The bottom surface of the push plate (6) is slightly higher than the top surface of the wedge-shaped support blocks (5). At the bottom of both ends of the frame (1), there are multiple rollers (11) connected; The lifting component further includes a U-shaped sliding frame (403). The sliding frame (403) is slidably connected inside the window (301). The opening of the sliding frame (403) faces the center of the lifting plate (2). The clamping plate (401) is fixedly connected to the upper part of one side of the opening of the sliding frame (403). Inside the sliding frame (403), there is a rotating shaft (404) rotatably connected. The special-shaped support block (402) is fixedly connected to the rotating shaft (404). On the rotating shaft (404), there is also a first worm gear (405) fixedly connected. On the side of the sliding frame (403)背离 its opening, there is a first motor (406) installed. Inside the sliding frame (403), there is a first worm (407) rotatably connected. The first worm (407) is in transmission connection with the first motor (406). The first worm (407) meshes with the first worm gear (405); On both sides of the frame (1), there are first linear modules (7) installed. The two ends of the lifting plate (2) are respectively in transmission connection with the two first linear modules (7). On both sides of the bottom of the lifting plate (2), there are second linear modules (8) installed respectively. The two mounting plates (3) are respectively in transmission connection with the two second linear modules (8). On the sides of the two mounting plates (3) that are far away from each other and corresponding to each window (301), there are third linear modules (9) installed. Each sliding frame (403) is in transmission connection with the corresponding third linear module (9). Along the center line at the bottom of the lifting plate (2), there is a fourth linear module (10) installed. The push plate (6) is in transmission connection with the fourth linear module (10); On the opposite sides of the two mounting plates (3), there are first chutes (302) opened. The wedge-shaped support blocks (5) are slidably connected inside the first chutes (302). Between the wedge-shaped support blocks (5) and the inner side walls of the first chutes (302), there are multiple first elastic components (501) connected; A mounting groove (502) is formed on the wedge-shaped support block (5), and a plurality of rollers (503) are rotatably connected in the mounting groove (502), and the rollers (503) are arranged in a straight line array, wherein the tops of the rollers (503) array all protrude outside the mounting groove (502); The two mounting plates (3) are provided with accommodating grooves (303) on the opposite sides thereof. An infrared transmitter and an infrared receiver are respectively installed in the two accommodating grooves (303). The accommodating grooves (303) are located at a height of the mounting plate (3) and are parallel to the lowest position that the clamping plate (401) can reach relative to the window (301). The infrared receiver is used to receive infrared light emitted by the infrared transmitter. A controller (13) is installed on one side of the outer upper portion of the frame (1). The controller (13) is used to control the start and stop of various electric components of the device. The infrared transmitter and the infrared receiver are both electrically connected to the controller (13). The lifting plate (2) includes two connecting plates (202) and a rotating plate (201). The rotating plate (201) is rotatably connected between the two connecting plates (202). The two connecting plates (202) are respectively connected to the two linear modules (7) for transmission. The two mounting plates (3) are slidably connected to the bottom of the rotating plate (201). The rotating plate (201) is fixed with a worm gear (1201) at both axial ends. The two connecting plates (202) are both rotatably connected with a worm gear (1202) meshing with the worm gear (1201). The two connecting plates (202) are both installed with a motor (1203). The output shaft of the motor (1203) is connected to the worm gear (1202) for transmission.

2. A construction material handling device as claimed in claim 1, characterized in that: A fixed plate (1402) is connected between one side of the bottom of both ends of the frame (1), two slide grooves are symmetrically opened on the inner side of the fixed plate (1402), wedge-shaped clamping rods (1401) are slidably connected in the two slide grooves, and two elastic members (1403) are connected between the wedge-shaped clamping rods (1401) and the inner wall of the two slide grooves. A scale bar (1404) is provided on the inner side of the fixed plate (1402) and below each of the two slide grooves.

Images