A gypsum block production line

Abstract

The invention discloses a gypsum block production line, which comprises a batching device, the outlet of which is connected to a block forming device, a turning device, a transfer device and a drying device are arranged in sequence behind the block forming device, and a block extracting device is arranged between the block forming device and the transfer device; the invention can be applied to the production of new gypsum blocks.

Description

Technical Field

[0001] The invention relates to a gypsum block production line and belongs to the field of gypsum block production tools. Background Art

[0002] In recent years, with the increasing promotion of various types of building blocks, new wall materials have been increasingly used in the market. However, during use, existing building blocks have some problems, specifically, the building blocks are large in size, the weight of a single block is high, and the handling and installation operations are extremely inconvenient.

[0003] In order to solve the above problems, the applicant now invented a new type of building block, such as Fig.15 As shown, it is easy to carry and install, and can improve the integrity and stability of the masonry wall. However, blocks of different shapes require different production processes. Therefore, a new production process is needed first, which is suitable for the production of new gypsum blocks. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a gypsum block production line which is suitable for the production of new gypsum blocks and can overcome the shortcomings of the prior art.

[0005] The technical solution of the present invention is: a gypsum block production line, which includes a batching device, which is connected to a block forming device at its outlet, a turning device, a transfer device and a drying device are arranged in sequence behind the block forming device, and a block extraction device is arranged between the block forming device and the transfer device.

[0006] The above-mentioned block forming device includes a material receiving platform, and a scraping device is provided on the plane of the material receiving platform, the scraping device includes a guide rail I arranged on the left and right sides of the material receiving platform, a slider that can move along the guide rail I is provided, a scraper is provided between the sliders, and scrapers for scraping materials on the left and right sides of the block are evenly provided on the lower end surface of the scraper; block forming grooves are evenly provided on the material receiving platform, mold cores extending to the grooves are evenly provided at the bottom of the block forming grooves, and notches for the scrapers to pass through are provided on the left and right sides of the groove and the upper end surface of the mold core, a movable bottom plate is provided at the bottom of the block forming groove, and a protrusion I is provided on the middle part of the upper surface of the movable bottom plate along the longitudinal direction of the block forming groove, the protrusion I is the same height as the notch and the width of the protrusion I is equal to the distance between the notches, a through hole of the mold core is provided between the protrusion I and the movable bottom plate, the movable bottom plate is connected to the hydraulic cylinder I provided at the lower end of the material receiving platform, and relative vertical protrusions II and grooves are respectively provided on the inner walls at both ends of the block forming groove.

[0007] The above-mentioned flipping device includes a flipping frame, on the left and right sides of the flipping frame are provided with a rotating shaft, an "L"-shaped flipping plate is provided on the rotating shaft, the left and right "L"-shaped flipping plates are symmetrically arranged, and a hydraulic cylinder II is provided on the frame body to flip the "L"-shaped flipping plate to the left and right sides of the flipping frame.

[0008] The above-mentioned transfer device includes a guide rail II, a traveling seat I that can move along the guide rail II, a block support seat on the traveling seat I, a transfer seat docked with the traveling seat I on the guide rail II, a steering device on the transfer seat, and a drying device docked with the transfer seat at the end of the guide rail II. The block support seat can move on the traveling seat I, the transfer seat and in the drying device.

[0009] A concrete transition section is provided between the above-mentioned walking seat I and the transfer seat, and a pushing device for pushing the block support seat to move is provided in the concrete transition section, the walking seat I, the transfer seat and the drying device.

[0010] The above-mentioned pushing device includes a guide rail III, on which a sliding seat is provided, and at the end of the sliding seat is hinged a pushing block for pushing the block support seat to move. One end of the pushing block is hinged on a fixed axis, and the hinged end can be rotated on a fixed axis and tilted to be in a state of pushing the sliding seat or to be in a state of being in contact with the guide rail III to avoid the block support seat. The sliding seat is connected to a traction rope or a hydraulic cylinder.

[0011] The above-mentioned steering device includes a chassis provided on the transfer seat, an annular groove is provided on the chassis, a motor and a rotating shaft are provided in the middle of the chassis, a driven gear is provided on the rotating shaft, the rotating shaft of the motor is connected to a gear shaft, a driving gear is provided on the gear shaft, the driving gear and the driven gear are meshed with each other, a support plate of a block support seat is provided on the upper end surface of the rotating shaft, and sliding wheels that cooperate with the annular groove are evenly distributed on the edge of the lower end surface of the support plate.

[0012] The block extraction device comprises a support frame, a slide rail is arranged at the upper end of the support frame, a travel seat II capable of walking along the slide rail is arranged on the travel seat II, a lifting device is arranged on the travel seat II, an extraction frame is arranged at the lower end of the lifting device, and grabbing devices are evenly distributed on the extraction frame.

[0013] The grabbing device comprises mounting plates and partitions respectively arranged on the left and right sides and the middle of the lower end surface of the extraction frame, hydraulic cylinders III facing the partitions are evenly mounted on the mounting plates, and a movable clamp is installed at the free end of the hydraulic cylinder III.

[0014] The left and right sides of the aforementioned partition are evenly provided with notches, and a protrusion III corresponding to the notches is provided on the side of the movable clamp facing the partition, and the notches and protrusion III respectively correspond to the mortise and tenon at both ends of the existing building blocks.

[0015] Compared with the prior art, the gypsum block production line of the present invention is connected with the block forming device at the outlet of the batching device, and a turning device, a transfer device and a drying device are sequentially arranged behind the block forming device, and a block extraction device is arranged between the block forming device and the transfer device; with such a structure, after being formed by the block forming device, the block is extracted by the block extraction device to the turning device for turning and erecting, and at the same time, the turned gypsum blocks are again lifted to the transfer device by the block extraction device, and transported to the drying device for drying by the transfer device.

[0016] The block forming device includes a material receiving platform, a scraping device is provided on the plane of the material receiving platform, the scraping device includes guide rails I arranged on the left and right sides of the material receiving platform, a slider that can move along the guide rails I is provided, a scraper is provided between the sliders, and scrapers for scraping materials on the left and right sides of the block are evenly provided on the lower end surface of the scraper; block forming grooves are evenly provided on the material receiving platform, mold cores extending to the grooves are evenly provided at the bottom of the block forming grooves, and notches for the scrapers to pass through are provided on the left and right sides of the groove and the upper end surface of the mold core, a movable bottom plate is provided at the bottom of the block forming groove, a protrusion I is provided on the middle part of the upper surface of the movable bottom plate along the longitudinal direction of the block forming groove, the protrusion I is the same height as the notch and the width of the protrusion I is equal to the distance between the notches, a through hole of the mold core is provided between the protrusion I and the movable bottom plate, the movable bottom plate is connected to the hydraulic cylinder I provided at the lower end of the material receiving platform, and the inner walls of the two ends of the block forming groove are respectively provided with Relative vertical protrusions II and grooves; such a structure can be connected to the block forming groove and then the upper end surface of the block can be arranged and formed by the scraping device. The scraping blade of the scraping device, the left and right sides of the groove and the upper end surface of the mold core are provided with notches for the scraping blade to pass through, so that the left and right sides of the upper end surface of the block can be scraped, so that the middle part of the upper surface of the block can be formed into a tenon; the protrusion I provided on the middle part of the upper surface of the movable bottom plate can be formed into a tenon groove in the middle part of the lower surface of the block, and the tenon groove on the lower surface of the block cooperates with the tenon on the upper surface of another block; and by providing relative vertical protrusions II and grooves on the inner walls at both ends of the block forming groove, the two end surfaces of the block can be formed into tenons and tenons that cooperate with each other; the formed block can be lifted by the cooperation of the movable bottom plate and the hydraulic cylinder I; the block with multiple vertical through holes can be opened by the mold core in the block forming groove; that is, such a mold can meet the production of existing new blocks.

[0017] The flipping device includes a flipping frame, a rotating shaft is provided on the left and right sides of the flipping frame, an "L"-shaped flipping plate is provided on the rotating shaft, the left and right "L"-shaped flipping plates are symmetrically arranged, and a hydraulic cylinder II is provided on the frame body for flipping the "L"-shaped flipping plate to the left and right sides of the flipping frame. Such a structure, through the symmetrically arranged "L"-shaped flipping plates and the hydraulic cylinder for flipping the "L"-shaped flipping plate to the left and right sides of the frame body, can facilitate the flipping of the building blocks placed on the flipping device to a vertical position with the mortise and tenon surface facing downward, so as to meet the subsequent stacking requirements and facilitate subsequent extraction.

[0018] The transfer device includes a guide rail II, a traveling seat I that can move along the guide rail II, a block support seat on the traveling seat I, a transfer seat docked with the traveling seat I on the guide rail II, a steering device on the transfer seat, and a drying device docked with the transfer seat at the end of the guide rail II, and the block support seat can move on the traveling seat I, the transfer seat and the drying device; such a structure can turn the travel direction of the block support seat through the steering device on the transfer seat during the transportation of blocks, so that it docks with the entrance of the drying device, which is convenient for transporting the block support seat carrying the blocks to the post-drying device for drying.

[0019] A concrete transition section is provided between the walking seat I and the transfer seat, and a pushing device for pushing the block support seat to move is provided in the concrete transition section, the walking seat I, the transfer seat and the drying device; because the block support seat has a heavy load, a docking transition is performed through the concrete transition section, which can avoid the block support seat from moving and affecting safety during the direct transfer from the walking seat to the transfer seat.

[0020] The pushing device includes a guide rail III, on which a sliding seat is provided, and a pushing block for pushing the block support seat to move is hinged at the end of the sliding seat, one end of the pushing block is hinged on a fixed axis, and the hinged end of the pushing block can be rotated on a fixed axis and tilted to be in a state of pushing the sliding seat or to be in a state of being in contact with the guide rail III to avoid the block support seat, and the sliding seat is connected to a traction rope or a hydraulic cylinder; with such a structure, when it is necessary to push the block support seat to move, the pushing block is in close contact with the bottom rear side of the block support seat, and the traction rope or hydraulic cylinder pulls the pushing block to push the block support seat forward.

[0021] The steering device includes a chassis provided on the transfer seat, an annular groove is provided on the chassis, a motor and a rotating shaft are provided in the middle of the chassis, a driven gear is provided on the rotating shaft, the rotating shaft of the motor is connected to a gear shaft, a driving gear is provided on the gear shaft, the driving gear and the driven gear are meshed with each other, a support plate of the block support seat is provided on the upper end face of the rotating shaft, and sliding wheels that cooperate with the annular groove are evenly distributed on the edge of the lower end face of the support plate; with such a structure, when the transfer seat moves to the entrance of the drying device, the support plate can be rotated through gear transmission, and the guide rail III rotated thereon is docked with the guide rail III of the drying device, thereby facilitating the introduction of the block support device into the drying device.

[0022] The block extraction device includes a support frame, a slide rail is provided at the upper end of the support frame, a travel seat II that can walk along the slide rail is provided on the travel seat II, a lifting device is provided on the travel seat II, an extraction frame is provided at the lower end of the lifting device, and grabbing devices are evenly distributed on the extraction frame; such a structure drives the extraction frame to move up and down through the lifting of the lifting device, thereby facilitating the grabbing of the grabbing device and transporting it to the flipping device through the travel seat II.

[0023] The grabbing device includes mounting plates and partitions respectively arranged on the left and right sides and the middle of the lower end surface of the extraction frame, hydraulic cylinders III facing the partitions are evenly installed on the mounting plates, and movable clamps are installed on the free ends of the hydraulic cylinders III; such a structure, through the separation of the partitions and in conjunction with the movable clamps on both sides, can clamp two rows of gypsum blocks at one time, thereby improving the efficiency of picking and placing.

[0024] Recesses are evenly distributed on the left and right sides of the partition, and protrusions III corresponding to the recesses are provided on the side of the movable clamp facing the partition. The recesses and protrusions III respectively correspond to the mortise and tenon at both ends of the existing building blocks. In this way, the recesses and protrusions III can correspond to the shape of the existing new gypsum building blocks, which is more conducive to clamping the gypsum building blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings, in which:

[0026] Figure 1 It is a schematic diagram of the connection structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the connection structure from another angle of the present invention.

[0028] Figure 3 It is a schematic diagram of the connection structure of the block forming device of the present invention.

[0029] Figure 4 It is a front view of the block forming device of the present invention.

[0030] Figure 5 It is a schematic diagram of the connection structure of a single building block forming groove of the present invention.

[0031] Figure 6 It is a schematic diagram of the connection structure of the movable bottom plate of the present invention.

[0032] Figure 7 It is a schematic diagram of the connection structure of a single building block forming groove after casting of the present invention.

[0033] Figure 8 It is a schematic diagram of the connection structure of the turning device of the present invention.

[0034] Fig. 9 It is a schematic diagram of the connection structure of the turning device of the present invention in the turning block state.

[0035] Fig.10 It is a schematic diagram of the connection structure of the transfer device of the present invention.

[0036] Fig.11 It is a schematic diagram of the connection structure between the rotating walking seat and the block supporting seat of the present invention.

[0037] Fig.12 It is a schematic diagram of the connection structure between the transfer seat and the steering device of the present invention.

[0038] Fig.13 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0039] Fig.14 It is a schematic diagram of the connection structure of the extraction rack of the present invention.

[0040] Fig.15 It is a structural schematic diagram of the novel building block of the present invention.

[0041] Among them, the batching device 1; the block forming device 2; the material receiving platform 201; the scraping device 202; the slider 203; the scraper 204; the scraper 205; the block forming groove 206; the mold core 207; the notch 208; the movable bottom plate 209; the protrusion I 210; the vertical protrusion II 211; the groove 212; the turning device 3; the turning frame 301; the "L"-shaped turning plate 302; the transfer device 4; the walking seat I 401; the block support seat 402; the transfer seat 403; the steering device 404; the concrete transition section 405; the sliding seat 406; the pushing block 407; the chassis 408; the annular groove 409; the motor 410; the rotating shaft 411; the support plate 412; the sliding wheel 413; the drying device 5; the block extraction device 6; Slide rail 601; walking seat II 602; extraction frame 603; mounting plate 604; partition 605; hydraulic cylinder III 606; movable splint 607; notch 608; protrusion III 609. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, rather than for limiting the protection scope of the present invention.

[0043] Example 1. Figure 1 As shown, a gypsum block production line includes a batching device 1, characterized in that: the outlet of the batching device 1 is connected to the block forming device 2, a turning device 3, a transfer device 4 and a drying device 5 are sequentially arranged behind the block forming device 2, and a block extraction device 6 is arranged between the block forming device 2 and the transfer device 4.

[0044] The block forming device 2 comprises a receiving platform 201, on which a scraping device 202 is arranged in a plane, wherein the scraping device 202 comprises guide rails I arranged on the left and right sides of the receiving platform 201, on which slide blocks 203 capable of moving along are arranged, between which scrapers 204 are arranged, and on the lower end surfaces of the scrapers 204 are evenly arranged scrapers 205 for scraping materials on the left and right sides of the block; block forming grooves 206 are evenly arranged on the receiving platform 201, at the bottom of the block forming grooves 206, mold cores 207 extending to the notch are evenly arranged, and on the left and right sides of the notch and on the upper end surfaces of the mold cores 207, there are A notch 208 is provided for the scraper 205 to pass through, and a movable bottom plate 209 is provided at the bottom of the block forming groove 206. A protrusion I 210 is provided in the middle of the upper surface of the movable bottom plate 209 along the longitudinal direction of the block forming groove 206. The protrusion I 210 is at the same height as the notch 208 and the width of the protrusion I 210 is equal to the distance between the notch 208. A through hole for the core 207 is provided between the protrusion I 210 and the movable bottom plate 209. The movable bottom plate 209 is connected to the hydraulic cylinder I provided at the lower end of the material receiving platform 201, and relative vertical protrusions II 211 and grooves 212 are provided on the inner walls at both ends of the block forming groove 206 respectively.

[0045] The flipping device 3 includes a flipping frame 301, on the left and right sides of the flipping frame 301, a rotating shaft 411 is provided, an "L"-shaped flipping plate 302 is provided on the rotating shaft 411, the left and right "L"-shaped flipping plates 302 are symmetrically arranged, and a hydraulic cylinder II is provided on the frame body to flip the "L"-shaped flipping plate 302 to the left and right sides of the flipping frame 301.

[0046] The transfer device 4 includes a guide rail II, on which is provided a traveling seat I 401 that can move along the guide rail II, on which is provided a block support seat 402, on which is provided a transfer seat 403 that is docked with the traveling seat I 401, on which is provided a steering device 404, and at the end of the guide rail II, a drying device 5 that is docked with the transfer seat 403 is provided, and the block support seat 402 can move on the traveling seat I 401, on the transfer seat 403 and in the drying device 5.

[0047] A concrete transition section 405 is provided between the walking seat Ⅰ401 and the transfer seat 403, and a pushing device for pushing the block support seat 402 to move is provided in the concrete transition section 405, the walking seat Ⅰ401, the transfer seat 403 and the drying device 5; the pushing device includes a guide rail III, a sliding seat 406 is provided on the guide rail III, and a pushing block 407 for pushing the block support seat 402 to move is hinged at the end of the sliding seat 406, and one end of the pushing block 407 is hinged on a fixed axis, and the hinged end of the pushing block 407 can be rotated on a fixed axis and tilted to push the sliding seat 406 or fit on the guide rail III to avoid the block support seat 4 02 state, the sliding seat 406 is connected to the traction rope or the hydraulic cylinder; the steering device 404 includes a chassis 408 provided on the transfer seat 403, an annular groove 409 is provided on the chassis 408, a motor 410 and a rotating shaft 411 are provided in the middle of the chassis 408, a driven gear is provided on the rotating shaft 411, the rotating shaft of the motor 410 is connected to a gear shaft, a driving gear is provided on the gear shaft, the driving gear and the driven gear are meshed with each other, a supporting plate 412 of the block supporting seat 402 is provided on the upper end face of the rotating shaft 411, and sliding wheels 413 that cooperate with the annular groove 409 are evenly distributed on the edge of the lower end face of the support plate 412.

[0048] The block extraction device 6 includes a support frame, a slide rail 601 is provided at the upper end of the support frame, a walking seat II 602 capable of walking thereon is provided on the slide rail 601, a lifting device is provided on the walking seat II 602, an extraction frame 603 is provided at the lower end of the lifting device, and grabbing devices are evenly distributed on the extraction frame 603; the grabbing device includes a mounting plate 604 and a partition plate 605 respectively provided on the left and right sides and the middle of the lower end surface of the extraction frame 603, hydraulic cylinders III 606 facing the partition plate 605 are evenly installed on the mounting plate 604, and a movable splint 607 is installed at the free end of the hydraulic cylinder III 606; recesses 608 are evenly distributed on the left and right sides of the partition plate 605, and a protrusion III 609 corresponding to the recess 608 is provided on the side of the movable splint 607 facing the partition plate 605, and the recess 608 and the protrusion III 609 respectively correspond to the mortise and tenon at both ends of the existing building blocks.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A gypsum block production line, comprising a batching device (1), characterized in that: The outlet of the batching device (1) is connected to the block forming device (2), a turning device (3), a transfer device (4) and a drying device (5) are sequentially arranged behind the block forming device (2), and a block extracting device (6) is arranged between the block forming device (2) and the transfer device (4); The block forming device (2) comprises a material receiving platform (201), a scraping device (202) is arranged on a plane on the material receiving platform (201), the scraping device (202) comprises guide rails I arranged on the left and right sides of the material receiving platform (201), a slider (203) capable of moving along the guide rails I is arranged, a scraper (204) is arranged between the sliders (203), and scrapers (205) for scraping materials on the left and right sides of the block are evenly arranged on the lower end surfaces of the scrapers (204); block forming grooves (206) are evenly arranged on the material receiving platform (201), a mold core (207) extending to the groove is evenly arranged at the bottom of the block forming groove (206), and scrapers are arranged on the left and right sides of the groove and on the upper end surface of the mold core (207) for scraping (205) passes through a notch (208), a movable bottom plate (209) is provided at the bottom of the block forming groove (206), a protrusion I (210) is provided in the middle of the upper surface of the movable bottom plate (209) along the longitudinal direction of the block forming groove (206), the protrusion I (210) is equal in height to the notch (208) and the width of the protrusion I (210) is equal to the distance between the notch (208), a through hole for the mold core (207) is provided between the protrusion I (210) and the movable bottom plate (209), the movable bottom plate (209) is connected to a hydraulic cylinder I provided at the lower end of the receiving platform (201), and opposite vertical protrusions II (211) and grooves (212) are provided on the inner walls at both ends of the block forming groove (206); The transfer device (4) comprises a guide rail II, a traveling seat I (401) capable of moving along the guide rail II is provided, a block support seat (402) is provided on the traveling seat I (401), a transfer seat (403) docked with the traveling seat I (401) is provided on the guide rail II, a steering device (404) is provided on the transfer seat (403), and a drying device (5) docked with the transfer seat (403) is provided at the end of the guide rail II, and the block support seat (402) moves on the traveling seat I (401), the transfer seat (403) and in the drying device (5).

2. The gypsum block production line according to claim 1, characterized in that: The turning device (3) comprises a turning frame (301), a rotating shaft (411) is provided on the left and right sides of the turning frame (301), an "L"-shaped turning plate (302) is provided on the rotating shaft (411), the left and right "L"-shaped turning plates (302) are symmetrically arranged, and a hydraulic cylinder II is provided on the frame body for turning the "L"-shaped turning plates (302) to the left and right sides of the turning frame (301).

3. The gypsum block production line according to claim 1, characterized in that: A concrete transition section (405) is provided between the walking seat I (401) and the transfer seat (403), and a pushing device for pushing the block support seat (402) to move is provided in the concrete transition section (405), the walking seat I (401), the transfer seat (403) and the drying device (5).

4. The gypsum block production line according to claim 3, characterized in that: The pushing device comprises a guide rail III, a sliding seat (406) is provided on the guide rail III, a pushing block (407) is hinged at the end of the sliding seat (406) for pushing the block support seat (402) to move, one end of the pushing block (407) is hinged on a fixed axis, the hinged end of the pushing block (407) is rotated and tilted on a fixed axis to push the sliding seat (406) or to fit the guide rail III to avoid the block support seat (402), and the sliding seat (406) is connected to a traction rope or a hydraulic cylinder.

5. The gypsum block production line according to claim 1, characterized in that: The steering device (404) comprises a chassis (408) provided on a transfer seat (403), an annular groove (409) provided on the chassis (408), a motor (410) and a rotating shaft (411) provided in the middle of the chassis (408), a driven gear provided on the rotating shaft (411), the rotating shaft of the motor (410) being connected to a gear shaft, a driving gear provided on the gear shaft, the driving gear and the driven gear being meshed with each other, a supporting plate (412) of a block supporting seat (402) provided on the upper end surface of the rotating shaft (411), and sliding wheels (413) cooperating with the annular groove (409) evenly distributed on the edge of the lower end surface of the supporting plate (412).

6. The gypsum block production line according to claim 1, characterized in that: The block extraction device (6) comprises a support frame, a slide rail (601) is provided at the upper end of the support frame, a travel seat II (602) capable of walking along the slide rail (601) is provided on the travel seat II (602), a lifting device is provided on the travel seat II (602), an extraction frame (603) is provided at the lower end of the lifting device, and grabbing devices are evenly distributed on the extraction frame (603).

7. The gypsum block production line according to claim 6, characterized in that: The grabbing device comprises a mounting plate (604) and a partition plate (605) respectively provided on the left and right sides and the middle of the lower end surface of the extraction frame (603); hydraulic cylinders III (606) facing the partition plate (605) are evenly installed on the mounting plate (604); and a movable clamping plate (607) is installed at the free end of the hydraulic cylinder III (606).

8. The gypsum block production line according to claim 7, characterized in that: Recesses (608) are evenly distributed on the left and right sides of the partition (605), and protrusions III (609) corresponding to the recesses (608) are provided on the side of the movable clamping plate (607) facing the partition (605), and the recesses (608) and protrusions III (609) correspond to the mortise and tenon at both ends of the existing building block, respectively.

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