Full-automatic multi-station can sealing equipment with vacuumizing and nitrogen charging functions

Abstract

The full-automatic multi-station can sealing equipment with the vacuumizing and nitrogen filling functions comprises a machine table, a feeding conveying belt and a discharging conveying belt are arranged on the machine table side by side, and a main support is arranged on the machine table and located between the feeding conveying belt and the discharging conveying belt. The main support is provided with a plurality of secondary jacking vacuumizing nitrogen filling can sealing mechanisms and can pushing mechanisms, and a can separating and positioning mechanism, a can cover feeding and edge pressing mechanism and an implicit blocking mechanism are sequentially arranged on the machine table in the feeding direction of the feeding conveying belt. The milk powder can sealing device has the beneficial effects that the structure is compact, the use of a driving part is reduced by adopting a plurality of linkage structures, milk powder can be prevented from being pumped out when the milk powder can is vacuumized, and the can sealing processing efficiency and processing quality are improved.

Description

Technical Field

[0001] The invention relates to the field of can sealing equipment, and in particular to a full-automatic multi-station can sealing equipment with vacuuming and nitrogen filling functions. Background Art

[0002] Milk powder cans are storage containers for milk powder, and can sealing machines are equipment used to seal milk powder cans. There are two main types of can sealing machines, one is a can sealing machine that can seal tinplate, paper, aluminum, and plastic containers, and the other is a can sealing machine that can seal glass containers with a vacuum.

[0003] For can sealing processing, there is a vacuum capping machine with a publication number of CN109747884A, which includes a frame, on which a can feeding belt and a can discharging belt are provided, a vacuum capping mechanism is provided between the can feeding belt and the can discharging belt, the vacuum capping mechanism includes a capping device that can fix the can cap and a sealing device that can feed the can body to the capping device and cooperate with the capping device, the capping device is provided with a No. 1 hole, the sealing device is provided with a No. 2 hole, the frame is provided with a can feeding mechanism that sequentially feeds the can body from the can feeding belt to the sealing device and the can discharging belt, and the cap feeding mechanism is installed on the capping device.

[0004] When the existing vacuum capping machine is performing vacuuming, some milk powder will be sucked out of the milk powder can pre-installed with the cap. This is mainly because the upper part of the can lid of the milk powder can has no limit when vacuuming, and the part of the cover that is not pressed on the can body is partially deformed, causing milk powder to overflow. It can only process a single milk powder can at a time. Therefore, a fully automatic multi-station can sealing equipment with vacuuming and nitrogen filling functions is needed. Summary of the invention

[0005] The purpose of the present invention is to provide a fully automatic multi-station can sealing device with vacuuming and nitrogen filling functions, which has a compact structure and adopts multiple linkage structures to reduce the use of driving parts. When vacuuming and sealing, a three-stage cylinder is used to lift the milk powder can in two stages, and the milk powder can is first lifted and then tightened, thereby reducing the degree of upward suspension of the can cover of the milk powder can during vacuuming, that is, reducing the degree of expansion of the gap between the can cover and the can body during vacuuming, thereby reducing the extraction amount of the milk powder can during vacuuming, and improving the processing efficiency and processing quality of milk powder can sealing.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fully automatic multi-station can sealing equipment with vacuum pumping and nitrogen filling functions, comprising a machine platform, a feeding conveyor belt and a discharging conveyor belt are arranged side by side on the machine platform, a main bracket is arranged on the machine platform between the feeding conveyor belt and the discharging conveyor belt, a plurality of secondary lifting vacuum pumping and nitrogen filling can sealing mechanisms and a can body pushing mechanism are arranged on the main bracket, a can body separation and positioning mechanism, a can cover feeding and pressing edge mechanism and an internal implicit blocking mechanism are arranged on the machine platform in sequence along the feeding direction of the feeding conveyor belt, the secondary lifting and vacuum pumping and nitrogen filling can sealing mechanisms are arranged on the machine platform, and the secondary lifting and vacuum pumping and nitrogen filling can sealing mechanisms are arranged on the machine platform. The vacuum nitrogen filling and sealing mechanism includes a lower base, a lower lifting cylinder, a three-position cylinder, a lower slide seat, a push rod, a bearing seat, a sealing tube, an exhaust pipe, an upper sealing chamber, a driving motor, a rotating disk, a switching cylinder, a swing arm, a wheel seat, a crimping wheel and a sealing wheel. The lower base is fixedly connected to the machine platform, the lower lifting cylinder and the three-position cylinder are both fixedly connected to the lower base, the lower slide seat is fixedly connected to the piston rod of the lower lifting cylinder, the sealing tube and the exhaust pipe are both fixedly connected to the lower slide seat, the push rod is coaxially arranged with the sealing tube, and the piston rod of the three-position cylinder passes through the lower slide seat and extends into the sealing tube and is fixed to the push rod The push rod is a step rod, the bearing seat is placed on the push rod, and an air guide hole is provided on the bearing seat. The upper sealing chamber is fixedly connected to the main bracket, the rotating disk, the wheel seat, the curling wheel and the sealing wheel are all located in the upper sealing chamber, the wheel seat and the rotating disk are rotatably connected to the upper sealing chamber, the curling wheel and the sealing wheel are rotatably connected to the two ends of the wheel seat respectively, the switching cylinder is composed of two single cylinders, the piston rod of one of the single cylinders of the switching cylinder is hinged to the outer wall of the upper sealing chamber, the upper end of the wheel seat extends to the outside of the upper sealing chamber and is hinged to one end of the swing arm, the The other end of the swing arm is hinged with the piston rod of another single cylinder of the switching cylinder, the rotating shaft of the driving motor is fixedly connected to the rotating disk, and the driving motor is fixedly connected to the outer wall of the upper sealing bin. After the piston rod of the lower lifting cylinder is fully extended, the lower sliding seat, the sealing tube and the upper sealing bin form a sealed cavity, and the upper sealing bin is provided with a nitrogen filling port. The internal implicit blocking mechanism includes a bottom plate, a lifting cylinder, a lifting seat and a blocking column. The lifting seat is provided with a yield groove corresponding to the feeding conveyor belt. The tank body separation and positioning mechanism includes a separation cylinder, a connecting plate, a connecting rod, a side bracket and a separation cam.

[0007] Furthermore, an adjusting screw is rotatably connected to the machine platform, the main bracket is slidably connected to the machine platform, and the adjusting screw is threadedly connected to the screw hole of the main bracket support foot.

[0008] Furthermore, the bottom plate is fixedly connected to the frame of the feeding conveyor belt, the lifting cylinder is fixedly connected to the lifting seat, the piston rod of the lifting cylinder is fixedly connected to the bottom plate, and the blocking column is fixedly connected to the upper end of the lifting seat.

[0009] Furthermore, the side bracket is fixedly connected to the machine, there are multiple separation cams, the separation cams are rotatably connected to the side bracket, one end of the connecting rod is hinged to the separation cam, the other end of the connecting rod is hinged to the connecting plate, the separation cylinder is hinged to the side bracket, and the piston rod of the separation cylinder is hinged to the connecting plate.

[0010] Furthermore, the can cover feeding and edge pressing mechanism comprises an automatic feeding bin and an edge pressing component, and the edge pressing component is located at the lower part of the automatic feeding bin.

[0011] Furthermore, both sides of the loading conveyor belt and both sides of the unloading conveyor belt are fixedly connected with guide seats, and guide rails are slidably connected to the guide seats, and the guide rails are fixedly connected to the guide seats via locking screws.

[0012] The beneficial effects of the present invention are as follows: the structure is compact, and multiple linkage structures are used to reduce the use of driving parts. When vacuuming and sealing the can, a three-position cylinder is used to perform two-stage lifting of the milk powder can, and the milk powder can is first lifted and then tightened, thereby reducing the degree to which the can cover of the milk powder can floats upward during vacuuming, that is, reducing the degree to which the gap between the can cover and the can body expands during vacuuming, thereby reducing the amount of milk powder can extracted during vacuuming, and improving the processing efficiency and processing quality of milk powder can sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an axonometric schematic diagram of the present invention.

[0014] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 3 It is a structural schematic diagram of the main support of the present invention.

[0016] Figure 4 It is a cross-sectional view of the sealing tube of the present invention.

[0017] Figure 5 It is a schematic diagram of the implicit blocking mechanism and the tank body separation and positioning mechanism of the present invention.

[0018] Figure 6 Schematic diagram of vacuum state.

[0019] Figure: 1, machine; 2, feeding conveyor belt; 3, unloading conveyor belt; 4, two-stage lifting vacuum nitrogen filling can sealing mechanism; 401, lower base; 402, lower lifting cylinder; 403, three-position cylinder; 404, lower slide seat; 405, ejector rod; 406, bearing seat; 407, sealing tube; 408, exhaust pipe; 409, upper sealing chamber; 410, driving motor; 411, rotating disk; 412, switching cylinder; 413, swing arm; 414, wheel Seat; 415, crimping wheel; 416, sealing wheel; 417, nitrogen filling port; 5, implicit blocking mechanism; 501, bottom plate; 502, lifting cylinder; 503, lifting seat; 504, blocking column; 6, tank body separation and positioning mechanism; 601, separation cylinder; 602, connecting plate; 603, connecting rod; 604, side bracket; 605, separation cam; 7, tank cover feeding and pressing mechanism; 8, main bracket; 801, adjusting screw; 9, tank body pushing mechanism. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] refer to Figure 1-Figure 6The fully automatic multi-station can sealing equipment with vacuuming and nitrogen filling functions shown in the figure comprises a machine platform 1, on which a feeding conveyor belt 2 and a discharging conveyor belt 3 are arranged side by side, a main bracket 8 is arranged between the feeding conveyor belt 2 and the discharging conveyor belt 3 on the machine platform 1, and a plurality of secondary lifting vacuuming and nitrogen filling can sealing mechanisms 4 and a tank pushing mechanism 9 are arranged on the main bracket 8, and the tank pushing mechanism 9 is used to transport milk powder cans from the feeding conveyor belt 2 to the can sealing station, and to push the processed finished products from the can sealing station to the discharging conveyor belt 3 for unloading, and a tank separation and positioning mechanism 6, a tank cover feeding and pressing edge mechanism 7 and an internal implicit blocking mechanism 5 are arranged on the machine platform 1 in sequence along the feeding direction of the feeding conveyor belt 2, and the tank separation and positioning mechanism 6 is used to position and separate the feeding conveyor belt The milk powder can body on the conveyor belt 2, the can cover feeding and edge pressing mechanism 7 is used to feed the can cover onto the milk powder can body, and pre-press and fold the can cover onto the milk powder can body, the two-stage lifting vacuum nitrogen filling and sealing mechanism 4 includes a lower base 401, a lower lifting cylinder 402, a three-position cylinder 403, a lower slide seat 404, a push rod 405, a bearing seat 406, a sealing tube 407, an exhaust pipe 408, an upper sealing chamber 409, a driving motor 410, a rotating disk 411, a switching cylinder 412, a swing arm 413, a wheel seat 414, a crimping wheel 415 and a sealing wheel 416, the lower base 401 is fixedly connected to the machine 1, the lower lifting cylinder 402 and the three-position cylinder 403 are both fixedly connected to the lower base 401, and the lower slide seat 404 is fixedly connected to the piston rod of the lower lifting cylinder 402 , the sealing tube 407 and the exhaust pipe 408 are both fixedly connected to the lower sliding seat 404, the push rod 405 is coaxially arranged with the sealing tube 407, the piston rod of the three-position cylinder 403 passes through the lower sliding seat 404 and extends into the sealing tube 407 and is fixedly connected to the push rod 405, the push rod 405 is a stepped rod, the bearing seat 406 is placed on the push rod 405, the bearing seat 406 can be directly removed from the push rod 405, which is convenient for cleaning and maintaining the sealing tube 407, and the contact position between the bearing seat 406 and the push rod 405 is provided with a bearing, and the bearing seat 406 is provided with an air guide hole, the upper sealing chamber 409 is fixedly connected to the main bracket 8, the rotating disk 411, the wheel seat 414, the curling wheel 415 and the sealing wheel 416 are all located in the upper sealing chamber 409, and the wheel seat 414 and the rotating disk 411 are all connected The upper sealing chamber 409 is rotatably connected, and the curling wheel 415 and the sealing wheel 416 are rotatably connected to the two ends of the wheel seat 414 respectively. The switching cylinder 412 is composed of two single cylinders, and the piston rod of one of the single cylinders of the switching cylinder 412 is hinged to the outer wall of the upper sealing chamber 409. The upper end of the wheel seat 414 extends to the outside of the upper sealing chamber 409 and is hinged to one end of the swing arm 413. The other end of the swing arm 413 is hinged to the piston rod of the other single cylinder of the switching cylinder 412. The rotating shaft of the driving motor 410 is fixedly connected to the rotating disk 411, and the driving motor 410 is fixedly connected to the outer wall of the upper sealing chamber 409. After the piston rod of the lower lifting cylinder 402 is fully extended, the lower seat 404, the sealing tube 407 and the upper sealing chamber 409 form a sealing chamber.The upper sealed chamber 409 is provided with a nitrogen filling port 417, which is used to introduce nitrogen into the milk powder tank after vacuuming. The internal implicit blocking mechanism 5 includes a bottom plate 501, a lifting cylinder 502, a lifting seat 503 and a blocking column 504. The lifting seat 503 is provided with a clearance groove corresponding to the feeding conveyor belt 2. The tank body separation and positioning mechanism 6 includes a separation cylinder 601, a connecting plate 602, a connecting rod 603, a side bracket 604 and a separation cam 605.

[0022] An adjusting screw rod 801 is rotatably connected to the machine platform 1, and the main bracket 8 is slidably connected to the machine platform 1. The machine platform 1 can guide the sliding of the main bracket 8. The adjusting screw rod 801 is used to adjust the height of the main bracket 8, which can adapt to the processing of milk powder cans of different heights. The adjusting screw rod 801 is threadedly connected to the screw hole of the supporting foot of the main bracket 8.

[0023] The bottom plate 501 is fixedly connected to the frame of the feeding conveyor belt 2, the lifting cylinder 502 is fixedly connected to the lifting seat 503, the piston rod of the lifting cylinder 502 is fixedly connected to the bottom plate 501, and the blocking column 504 is fixedly connected to the upper end of the lifting seat 503. The blocking column 504 is mainly used to position and block the transportation of milk powder cans.

[0024] The side bracket 604 is fixedly connected to the machine 1, and there are multiple separation cams 605. The separation cams 605 are rotatably connected to the side bracket 604. One end of the connecting rod 603 is hinged to the separation cam 605, and the other end of the connecting rod 603 is hinged to the connecting plate 602. The connecting rod 603 can drive the separation cam 605 to rotate under the sliding of the connecting plate 602 to position and separate the milk powder cans on the feeding conveyor belt 2. The separation cylinder 601 is hinged to the side bracket 604, and the piston rod of the separation cylinder 601 is hinged to the connecting plate 602.

[0025] The can lid feeding and edge pressing mechanism 7 comprises an automatic feeding bin and an edge pressing assembly. The automatic feeding bin is used to feed the can lids one at a time onto the can body. The edge pressing assembly is located at the lower part of the automatic feeding bin and is used to pre-install the can lids onto the can body.

[0026] Both sides of the loading conveyor belt 2 and the unloading conveyor belt 3 are fixedly connected with guide seats, and guide rails are slidably connected to the guide seats. The guide rails can guide the feeding of the milk powder cans to prevent deviation, and the guide rails are fixedly connected to the guide seats by locking screws.

[0027] The working principle of the present invention is as follows: the milk powder cans filled with milk powder are conveyed by the feeding conveyor belt 2, the milk powder cans are first positioned and separated at the tank body separation and positioning mechanism 6, the separation cam 605 is driven to rotate by the extension and contraction of the piston rod of the separation cylinder 601 to separate the milk powder cans, and at the same time, the tank cover feeding and edge pressing mechanism 7 feeds the tank cover onto the tank body of the milk powder can and ties the edges together for pre-assembly; then the milk powder cans continue to be conveyed, and are blocked by the implicit blocking mechanism 5 so that multiple milk powder cans are sequentially stopped at each feeding station, and then clamped by the tank body pushing mechanism 9. The milk powder can is moved to the vacuum sealing station, the piston rod of the lower lifting cylinder 402 is fully extended, the sealing tube 407 rises and forms a sealing chamber with the upper sealing chamber 409. The three-position cylinder 403 has two strokes. When vacuuming, the milk powder can can be lifted first, and the bearing seat 406 first performs a large lifting stroke. At this time, the milk powder can, the can cover and the rotating disk 411 are brought close together (at this time, there is a certain gap between the rotating disk 411 and the can cover, the can cover is pre-assembled on the can body, and there is also a gap between the can cover and the can body for vacuuming, but the rotating disk 411 can reduce The degree to which the can lid of the milk powder can is suspended upward during vacuuming, that is, the degree to which the gap between the can lid and the can body is expanded during vacuuming, thereby reducing the amount of milk powder can extracted during vacuuming). Then, the sealed chamber is vacuumed from the vacuum pipe 408 through an external vacuum device. After vacuuming, nitrogen is filled into the sealed chamber from the nitrogen filling port 417. After nitrogen filling, before sealing the can, the piston rod of the three-position cylinder 403 is fully extended. At this time, the milk powder can is tightened. The bearing seat 406 is slightly lifted at this time. At this time, the milk powder can, the can lid and the rotating disk 411 are pressed together. Start, the driving motor 410 drives the rotating disk 411 to rotate, the switching cylinder 412 drives the swing arm 413 to swing so that the curling wheel 415 is close to the can cover, and the curling is performed first. After the curling is completed, the switching cylinder 412 drives the swing arm 413 to make the sealing wheel 416 close to the edge of the can cover. During the whole process, the driving motor 410 drives the rotating disk 411 to rotate, and the sealing wheel 416 can be sealed during the rotation of the milk powder can. After completing the entire can sealing process, after the driving parts are reset, the finished product is pushed to the unloading conveyor belt 3 for unloading through the can body pushing mechanism 9.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The above embodiments are used to further illustrate the present invention, but the present invention is not limited to these specific embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be understood to be within the protection scope of the present invention.

Claims

1. A fully automatic multi-station can sealing equipment with vacuum and nitrogen filling functions, characterized by: The invention comprises a machine platform (1), wherein a feeding conveyor belt (2) and a discharging conveyor belt (3) are arranged side by side on the machine platform (1), a main support (8) is arranged between the feeding conveyor belt (2) and the discharging conveyor belt (3) on the machine platform (1), a plurality of secondary lifting vacuum nitrogen filling can sealing mechanisms (4) and a can body pushing mechanism (9) are arranged on the main support (8), and a can body separation positioning mechanism (6), a can cover feeding edge pressing mechanism (7) and an internal hidden blocking mechanism (5) are arranged on the machine platform (1) in sequence along the feeding direction of the feeding conveyor belt (2), the secondary lifting vacuum nitrogen filling can sealing mechanism (4) comprises a lower base (401), a lower lifting cylinder (402), a three-position cylinder (403), and a lower bottom surface (404). 03), a lower sliding seat (404), a push rod (405), a bearing seat (406), a sealing tube (407), an exhaust pipe (408), an upper sealing chamber (409), a driving motor (410), a rotating disk (411), a switching cylinder (412), a swing arm (413), a wheel seat (414), a crimping wheel (415) and a sealing wheel (416), wherein the piston rod of the three-position cylinder (403) passes through the lower sliding seat (404), extends into the sealing tube (407) and is fixedly connected to the push rod (405), the push rod (405) is a stepped rod, the bearing seat (406) is placed on the push rod (405), an air guide hole is provided on the bearing seat (406), the upper sealing chamber (409) is connected to the main The bracket (8) is fixedly connected, the rotating disk (411), the wheel seat (414), the curling wheel (415) and the sealing wheel (416) are all located in the upper sealing chamber (409), the wheel seat (414) and the rotating disk (411) are all rotatably connected to the upper sealing chamber (409), the curling wheel (415) and the sealing wheel (416) are respectively rotatably connected to the two ends of the wheel seat (414), the switching cylinder (412) is composed of two single cylinders, the piston rod of one of the single cylinders of the switching cylinder (412) is hinged to the outer wall of the upper sealing chamber (409), the upper end of the wheel seat (414) extends to the outside of the upper sealing chamber (409) and is hinged to one end of a swing arm (413), and the swing arm ( The other end of the lower lifting cylinder (402) is hingedly connected to the piston rod of another single cylinder of the switching cylinder (412); the rotating shaft of the driving motor (410) is fixedly connected to the rotating disk (411); the driving motor (410) is fixedly connected to the outer wall of the upper sealing chamber (409); after the piston rod of the lower lifting cylinder (402) is fully extended, the lower slide seat (404), the sealing tube (407) and the upper sealing chamber (409) form a sealed chamber; the upper sealing chamber (409) is provided with a nitrogen filling port (417); the piston rod of the three-position cylinder (403) is extended to the middle position; the bearing seat (406) lifts the milk powder can to move closer to the rotating disk (411); at this time, a certain gap is left between the rotating disk (411) and the can cover.

2. The fully automatic multi-station can sealing equipment with vacuum and nitrogen filling functions according to claim 1, characterized in that: An adjusting screw rod (801) is rotatably connected to the machine platform (1), the main support (8) is slidably connected to the machine platform (1), and the adjusting screw rod (801) is threadedly connected to a screw hole of a supporting foot of the main support (8).

3. The fully automatic multi-station can sealing equipment with vacuum and nitrogen filling functions according to claim 1, characterized in that: The lower base (401) is fixedly connected to the machine platform (1); the lower lifting cylinder (402) and the three-position cylinder (403) are both fixedly connected to the lower base (401); the lower sliding seat (404) is fixedly connected to the piston rod of the lower lifting cylinder (402); the sealing tube (407) and the exhaust tube (408) are both fixedly connected to the lower sliding seat (404); and the ejector rod (405) is coaxially arranged with the sealing tube (407).

4. The fully automatic multi-station can sealing equipment with vacuum and nitrogen filling functions according to claim 1, characterized in that: The implicit blocking mechanism (5) comprises a bottom plate (501), a lifting cylinder (502), a lifting seat (503) and a blocking column (504); the lifting seat (503) is provided with a clearance groove corresponding to the feeding conveyor belt (2); the bottom plate (501) is fixedly connected to the frame of the feeding conveyor belt (2); the lifting cylinder (502) is fixedly connected to the lifting seat (503); the piston rod of the lifting cylinder (502) is fixedly connected to the bottom plate (501); and the blocking column (504) is fixedly connected to the upper end of the lifting seat (503).

5. The fully automatic multi-station can sealing equipment with vacuum and nitrogen filling functions according to claim 1, characterized in that: The tank body separation and positioning mechanism (6) comprises a separation cylinder (601), a connecting plate (602), a connecting rod (603), a side bracket (604) and a separation cam (605); the side bracket (604) is fixedly connected to the machine platform (1); there are a plurality of separation cams (605); the separation cams (605) are rotatably connected to the side bracket (604); one end of the connecting rod (603) is hinged to the separation cam (605); the other end of the connecting rod (603) is hinged to the connecting plate (602); the separation cylinder (601) is hinged to the side bracket (604); and the piston rod of the separation cylinder (601) is hinged to the connecting plate (602).

6. The fully automatic multi-station can sealing equipment with vacuum and nitrogen filling functions according to claim 1, characterized in that: The can lid feeding and edge pressing mechanism (7) comprises an automatic feeding bin and an edge pressing component, wherein the edge pressing component is located at the lower part of the automatic feeding bin.

7. The fully automatic multi-station can sealing equipment with vacuum and nitrogen filling functions according to claim 1, characterized in that: Both sides of the loading conveyor belt (2) and both sides of the unloading conveyor belt (3) are fixedly connected to guide seats, and guide rails are slidably connected to the guide seats, and the guide rails are fixedly connected to the guide seats via locking screws.

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