Fixed erecting structure for cantilever steel springboard

Abstract

The invention belongs to the technical field of building construction, and particularly relates to a fixed erecting structure for a cantilever steel springboard, the fixed erecting structure comprises a main body steel structure, a cantilever and the steel springboard, the main body steel structure comprises at least two steel beams, at least one steel beam is fixedly provided with a lug plate, the cantilever is arranged between the two adjacent steel beams, one end of the cantilever is provided with a first clamp connected with the lug plate, and the other end of the cantilever is provided with a second clamp. The steel springboard is arranged at the top of the cantilever, a protective net is installed on one side of the steel springboard, and the bottom of the steel springboard is connected to the top of the first clamp. During installation, the steel springboard is supported on the main body steel structure through the lug plate and the cantilever, and the first clamp and the second clamp are kept away from the top of the steel springboard; therefore, the activity space on the steel springboard is opened. Permanent components of an original structure can be fully utilized as supporting points of a temporary structure, permanent and temporary combined type supporting is achieved, machining of temporary components is reduced, and the activity space on the steel springboard is opened.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a fixed erection structure for a cantilevered steel springboard. Background Art

[0002] Scaffolding is a temporary support structure commonly used in construction, mainly used to provide a working platform and support formwork. Steel pipe scaffolding is mainly composed of steel pipes, fasteners and other connectors, and has the characteristics of easy installation and strong bearing capacity. Cantilever scaffolding is widely used in construction, and cantilever frames are usually set up in the form of pre-embedded or welded.

[0003] Welding the scaffolding on the main steel structure is likely to cause damage to the main structure. Therefore, when installing the steel springboard, wire tying or bolt reinforcement is mainly used. When erecting, the following problems still exist: 1. The steel springboard is supported by a triangular scaffolding and suspended outside the main steel structure. It is reinforced by a large number of temporary bolts and almost no other parts of the main steel structure are used for support. The overall erection workload is large, which is not conducive to reducing the workload.

[0004] 2. The steel springboard is installed on a triangular scaffolding, and generally a large number of inclined supporting rods are used to pull it to keep it suspended. These inclined supporting rods are distributed on both sides of the steel springboard, occupying the activity space and bringing a certain blocking effect to the construction workers using it. Summary of the invention

[0005] The purpose of the present invention is to provide a fixed erection structure for a cantilevered steel springboard, which can fully utilize the permanent components of the original structure as support points of a temporary structure, realize permanent and temporary combined support, reduce the processing of temporary components, and open up activity space on the steel springboard.

[0006] The technical solution adopted by the present invention is as follows: A fixed erection structure for a cantilever steel gangplank, comprising: A main steel structure, the main steel structure comprising at least two steel beams, wherein at least one of the steel beams is fixed with a lug plate; A cantilever, wherein the cantilever is arranged between two adjacent steel beams, one end of the cantilever is provided with a first clamp connected to the ear plate, and the other end of the cantilever is provided with a second clamp connected to the steel beam; A steel springboard is arranged on the top of the cantilever and a protective net is installed on one side of the steel springboard. The bottom of the steel springboard is connected to the top of the first clamp. During installation, the steel springboard is supported on the main steel structure by the ear plate and the cantilever, and the first clamp and the second clamp are kept away from the top of the steel springboard to open up the activity space on the steel springboard.

[0007] As an optional solution, the cantilever includes a cantilever member and a diagonal brace that are hinged to each other, and there is an angle between the cantilever member and the diagonal brace to form a triangular support structure at the bottom of the steel springboard; The end of the cantilever away from the diagonal support is forked and the fork is hinged to the ear plate, the first clamp is sleeved outside the cantilever, and the end of the diagonal support away from the cantilever is connected to the second clamp.

[0008] As an optional solution, the first clamp includes a cross support beam and a clamp that are hinged to each other, the cross support beam is used to stick to the bottom of the steel beam, and the clamp is used to stick to the top of the steel beam, a fixing screw is passed through one end of the cross support beam and one end of the clamp, and a hinged section connected to one end of the diagonal support is fixed on the outside of the clamp.

[0009] As an optional solution, the second clamp includes a bolt rod and two clamps located on both sides of the bolt rod, the two clamps are distributed on both sides of the cantilever, and limiting screws for inserting the steel springboard are fixed on the outer sides of the two clamps away from the bolt rod.

[0010] As an optional solution, a fixed steel plate is provided at the bottom of the steel springboard, and the fixed steel plate is in the shape of a double-hole plate, and the double holes are used to pass the limiting screws to limit the two clamps.

[0011] As an optional solution, a limiting hole for inserting the limiting screw is opened inside the steel springboard, and a fastening nut that matches the thread of the limiting screw is inserted into the limiting hole.

[0012] As an optional solution, a lifting ring, a steel cable passing through the lifting ring, and a pigment rubber bag fixedly connected to the steel cable are provided on the outer side of the diagonal support, wherein both ends of the steel cable are respectively tied to the steel beam, and the pigment rubber bag is filled with color powder. When the cantilever falls off, the cantilever is pulled on the steel beam by the steel cable, and the pigment rubber bag and the lifting ring are driven to squeeze each other to release the color powder.

[0013] As an optional solution, a trumpet mouth is fixed inside the pigment rubber bag, the port of the trumpet mouth passes through the pigment rubber bag and a rubber plug is inserted into the port, and a traction rope fixedly connected to the inner wall of the pigment rubber bag is fixed to one end of the rubber plug located inside the trumpet mouth.

[0014] As an optional solution, concave load-bearing clamps and locks for locking one end of the steel cable are arranged at intervals on the outside of the steel beam, and a flange plate with holes for passing the steel cable is fixed to the outside of the load-bearing clamp. During installation, one end of the steel cable is wrapped around the load-bearing clamp, and the folded part is locked by the lock.

[0015] As an optional solution, a wedge-shaped plate fixedly connected to the diagonal brace is fixed on the outside of the lifting ring, and the length of the wedge-shaped plate is greater than the width of the pigment rubber bag. When the pigment rubber bag is pulled, the wedge-shaped plate cooperates with the lifting ring to limit the pigment rubber bag.

[0016] The technical effects achieved by the present invention are: The temporary components of the present invention can be prefabricated in a factory and assembled into a whole separately, which is convenient for overall hoisting on site and installation of a steel springboard. During installation, the steel springboard is supported on the main steel structure by ear plates and cantilevers, which can fully utilize the permanent components of the original structure as support points of the temporary structure, realize permanent and temporary combined support, and reduce the processing of temporary components; after the steel springboard is fixed, the first clamp and the second clamp are kept away from the top of the steel springboard to open up the activity space on the steel springboard, and only a protective net is installed for safety protection to avoid blocking construction personnel.

[0017] When the steel springboard is installed in the present invention, two pair of clamps are distributed on both sides of the cantilever, and a limiting screw for inserting the steel springboard is fixed at a position away from the bolt rod at the outer side of the two pair of clamps. The installation can be completed quickly after insertion, which is simple, fast and standardized. The steel springboard can also be horizontally limited to prevent slipping, and the safety is high.

[0018] When the cantilever of the present invention falls off, the cantilever is pulled on the steel beam by the steel cable to provide safety protection, and the pigment rubber bag and the hanging ring are driven to squeeze each other to release the colored powder. The colored powder is then flown over the steel springboard with the high-altitude airflow to be easily seen by construction workers, thereby promptly notifying them of the collapse of the triangular support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the fixed erection structure in the first embodiment of the present invention; Figure 2 is a schematic structural diagram of a single cantilever in Embodiment 1 of the present invention; Figure 3 This is a front view of the steel gangway in the first embodiment of the present invention; Figure 4 is a schematic structural diagram of a cantilever member in Embodiment 1 of the present invention; Figure 5 is a schematic structural diagram of the first clamp in the first embodiment of the present invention; Figure 6 is a schematic structural diagram of the second clamp in the first embodiment of the present invention; Figure 7 It is a front view of the fixed erection structure in the second embodiment of the present invention; Figure 8 It is a cross-sectional view of the pigment rubber bag in the second embodiment of the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Main steel structure; 100. Steel beam; 101. Ear plate; 2. Cantilever; 201. Overhang; 202. Diagonal brace; 3. First clamp; 301. Cross beam; 302. Hoop; 303. Fixing screw; 304. Hinge joint; 4. Second clamp; 400. Clamp; 401. Bolt; 402. Limiting screw; 403. Fixing steel sheet; 5. Steel springboard; 501. Protective net; 502. Limiting hole; 503. Fastening nut; 6. Steel cable; 7. Lifting ring; 8. Paint rubber bag; 9. Trumpet; 901. Rubber plug; 902. Towing rope; 11. Load-bearing clamp; 12. Flange plate with holes; 13. Lock; 14. Wedge plate. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0022] Embodiment 1: like Figure 1-Figure 6 As shown, a fixed erection structure for a cantilevered steel springboard comprises a main steel structure 1, a cantilever 2 and a steel springboard 5. The main steel structure 1 is pre-installed on the outer surface of the wall in the early stage of construction, while the cantilever 2 needs to be assembled on site by construction workers and then installed on the main steel structure 1. The cantilever 2 is arranged between two adjacent steel beams 100, and the steel springboard 5 is arranged on the top of the cantilever 2. Through the action of a protective net 501 installed on one side of the steel springboard 5, an activity space is isolated on the steel springboard 5 to facilitate subsequent construction work by construction workers.

[0023] See attached Figure 1 , Figure 2 and Figure 4 The main steel structure 1 is a permanent component of the original structure of the building construction and needs to be fully utilized. To this end, the main steel structure 1 of this embodiment includes at least two steel beams 100. For example, ten steel beams 100 are vertically spaced and arranged. The cantilever 2 and the steel springboard 5 are installed on different steel beams 100, and can be arranged at different heights. Furthermore, at least one bottom wall of the steel beam 100 is welded with an ear plate 101, a first clamp 3 connected to the ear plate 101 is provided at one end of the cantilever 2, and a second clamp 4 connected to the steel beam 100 is provided at the other end, wherein the cantilever 2, the first clamp 3 and the second clamp 4 can be prefabricated in a factory and assembled into a whole, respectively, so as to facilitate the overall hoisting on site and the installation of the steel springboard 5. During installation, the steel springboard 5 is supported on the main steel structure 1 by the ear plate 101 and the cantilever 2, so that the permanent components of the original structure can be fully utilized as the supporting points of the temporary structure, and the processing of the temporary components can be reduced; the bottom of the steel springboard 5 is connected to the top of the first clamp 3 for locking, and the first clamp 3 and the second clamp 4 are kept away from the top of the steel springboard 5 to open the activity space on the steel springboard 5; Furthermore, for some steel beams 100 that are not welded with ear plates 101, the cantilever 2 can also be supported by adding a second clamp 4. In this way, the installation can be completed without using a large number of bolts, and then the steel springboard 5 and the protective net 501 can be installed. This is simple and convenient, and helps to speed up the construction progress.

[0024] See attached Figure 1 , pictures and Figure 4 In order to improve the overall stability of the fixed erection structure, the cantilever 2 of this embodiment includes a cantilever member 201 and a diagonal brace 202 that are hinged to each other. Since there is an angle between the cantilever member 201 and the diagonal brace 202, a triangular support structure can be formed at the bottom of the steel springboard 5, and the overall stability is high. In addition, no less than three triangular support structures are arranged under each steel springboard 5, with multiple fulcrums, good balance, and not easy to tip over or tilt. Among them, one end of the cantilever member 201 away from the diagonal brace 202 is forked and hinged to the ear plate 101. The hinge can be achieved by bolts and nuts. The cantilever member 201 can be separated from the ear plate 101 by unscrewing the nuts. The first clamp 3 is sleeved on the outside of the cantilever member 201 to tighten the first clamp 3 and the steel springboard 5. The end of the diagonal brace 202 away from the cantilever member 201 is connected to the second clamp 4. The convenience of installation of the cantilever member 201 and the diagonal brace 202 is improved by disassembly and assembly of the first clamp 3 and the second clamp 4.

[0025] See attached Figure 2 and Figure 5The first clamp 3 of this embodiment includes a cross beam 301 and a clamp 302 hinged to each other, wherein the cross beam 301 is used to stick to the bottom of the steel beam 100, and the clamp 302 is used to stick to the top of the steel beam 100, and a hinge section 304 hinged to one end of the diagonal support 202 through a pin is welded on the outside of the clamp 302, one end of the cross beam 301 and one end of the clamp 302 are designed to have circular holes and a fixing screw 303 passes through the two circular holes. After the cross beam 301 and the clamp 302 are sleeved on the steel beam 100, the circular hole is exposed to insert the fixing screw 303, and the cross beam 301 and the clamp 302 are locked from both sides by using a nut installed along the thread to the fixing screw 303.

[0026] See attached Figure 2 , Figure 3 and Figure 6 The second clamp 4 of this embodiment includes a bolt rod 401 and a pair of clips 400 located on both sides of the bolt rod 401. When installing the steel springboard 5, the two pair of clips 400 are distributed on both sides of the cantilever 201. The position of the outer side of the two pair of clips 400 away from the bolt rod 401 is fixed with a limiting screw 402 for inserting the steel springboard 5. The insertion can be completed quickly, which is simple, fast and standardized. The steel springboard 5 can also be horizontally limited to prevent slipping, and the safety is high.

[0027] See attached Figure 3 and Figure 6 In this embodiment, a fixing steel sheet 403 is provided at the bottom of the steel springboard 5. The fixing steel sheet 403 is designed to be a double-hole plate, and the double holes are used to pass the limiting screws 402. Before placing the steel springboard 5, the fixing steel sheet 403 is placed on two adjacent limiting screws 402 to horizontally limit the two pair of clamps 400, so that the second clamp 4 is more secure.

[0028] See attached Figure 3 and Figure 6 In this embodiment, a limiting hole 502 for inserting the limiting screw 402 is opened inside the steel springboard 5, and a fastening nut 503 that is threadably matched with the limiting screw 402 is inserted inside the limiting hole 502. After the steel springboard 5 is placed, the fastening nut 503 is screwed onto the limiting screw 402, and the vertical limitation of the steel springboard 5 is achieved by pressing the lower edge of the limiting hole 502.

[0029] The working principle of the present invention is as follows: during operation, the cantilever 2, the first clamp 3 and the second clamp 4 can be prefabricated in a factory and assembled into a whole, which is convenient for overall hoisting on site and installation of the steel springboard 5.

[0030] During installation, the steel springboard 5 is supported on the main steel structure 1 by the ear plate 101 and the cantilever 2, so that the permanent components of the original structure can be fully utilized as the supporting points of the temporary structure, reducing the processing of temporary components; the bottom of the steel springboard 5 is connected to the top of the first clamp 3 and locked, and the first clamp 3 and the second clamp 4 are kept away from the top of the steel springboard 5 to open up the activity space on the steel springboard 5.

[0031] When installing the steel springboard 5, two pair of clips 400 are also distributed on both sides of the cantilever 201. A limiting screw 402 for inserting the steel springboard 5 is fixed at a position away from the bolt rod 401 on the outside of the two pair of clips 400. The installation can be completed quickly after insertion. It is simple, fast and standardized. The steel springboard 5 can also be horizontally limited to prevent slipping, which is highly safe.

[0032] Embodiment 2: The triangular support structure relies on the first clamp 3 and the second clamp 4, but the distribution is relatively loose and the distance between them is large. Once the steel springboard 5 bears a huge load locally, it will be subjected to severe downward pressure, resulting in possible collapse and falling. At this time, the construction workers' line of sight will be blocked by the steel springboard 5, making it difficult to discover it in time.

[0033] like Figure 7-Figure 8 As shown, this embodiment is based on the first embodiment and provides a fixed erection structure for a cantilevered steel springboard. A lifting ring 7, a steel cable 6 passing through the lifting ring 7, and a pigment rubber bag 8 fixedly connected to the steel cable 6 are arranged on the outer side of the diagonal support 202, wherein both ends of the steel cable 6 are respectively tied to the steel beam 100, and the pigment rubber bag 8 is filled with color powder. When the cantilever 2 falls off, the cantilever 2 is pulled on the steel beam 100 by the steel cable 6, which can be used for safety protection, and drive the pigment rubber bag 8 and the lifting ring 7 to squeeze each other to release the color powder. The color powder is used to float over the steel springboard 5 with the high-altitude airflow, so that it is easy for construction personnel to see it, and promptly remind the collapse of the triangular support structure.

[0034] The color powder may be the color powder used in sports events, which is generally sprayed out using an air gun or a spray bottle in sports events to form a smoky effect, while in the triangular support structure, it is quickly sprayed out through the pressure of the pigment rubber bag 8.

[0035] See attached Figure 7 and Figure 8In order to spray out the color powder smoothly, in this embodiment, a trumpet mouth 9 is bonded inside the pigment rubber bag 8, and the port of the trumpet mouth 9 is designed to pass through the pigment rubber bag 8 and a rubber plug 901 is inserted into the port. The rubber plug 901 is used to seal the pigment rubber bag 8 on a daily basis, and a traction rope 902 bonded to the inner wall of the pigment rubber bag 8 is bonded to one end of the rubber plug 901 located inside the trumpet mouth 9. The traction rope 902 is used to pull the rubber plug 901 so that the rubber plug 901 can stably block the trumpet mouth 9. When the pigment rubber bag 8 is pressurized, the rubber plug 901 is pushed out by the squeezing effect of the internal color powder, and the traction rope 902 made of polyethylene can be broken to push out the rubber plug 901, quickly open the trumpet mouth 9, and quickly spray the color powder upward, so as to limit the flow direction of the color powder and make it pass over the steel springboard 5.

[0036] See attached Figure 7 and Figure 8 The steel beam 100 is provided with concave load-bearing clamps 11 and lock buckles 13 for locking one end of the steel cable 6 at intervals on the outside. During installation, one end of the steel cable 6 is wrapped around the load-bearing clamp 11, and its folded part is locked by the lock buckle 13. In addition, a flange plate 12 with holes for passing the steel cable 6 is welded on the outside of the load-bearing clamp 11. When wrapping the steel cable 6, one end of it is first passed through the hole of the flange plate 12 with holes to bear the weight of the steel cable 6. There is no need for construction workers to hold it with their hands all the time, which is convenient and saves physical strength.

[0037] See attached Figure 7 and Figure 8 A wedge-shaped plate 14 welded to the diagonal brace 202 is welded on the outside of the lifting ring 7. On the one hand, it is convenient to support the lifting ring 7 to improve the stability when supporting the steel cable 6. On the other hand, the wedge-shaped plate 14 is designed to have a length larger than the width of the pigment rubber bag 8. When the pigment rubber bag 8 is pulled, the wedge-shaped plate 14 cooperates with the lifting ring 7 to limit the pigment rubber bag 8, so that the color powder can be squeezed out more smoothly.

[0038] The working principle of the present invention is as follows: when the cantilever 2 falls off, the cantilever 2 is pulled on the steel beam 100 by the steel cable 6, which can provide safety protection, and drive the pigment rubber bag 8 and the hanging ring 7 to squeeze each other to release the colored powder. The colored powder is then flown over the steel springboard 5 with the high-altitude airflow, so that it can be easily seen by the construction workers, and timely remind them of the collapse of the triangular support structure.

[0039] The above is only an optional implementation of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A fixed erection structure for a cantilever steel gangplank, characterized in that: include: A main steel structure (1), the main steel structure (1) comprising at least two steel beams (100), wherein at least one of the steel beams (100) is fixed with a lug plate (101); A cantilever (2), the cantilever (2) being arranged between two adjacent steel beams (100), one end of the cantilever (2) being provided with a first clamp (3) connected to the ear plate (101), and the other end of the cantilever (2) being provided with a second clamp (4) connected to the steel beam (100); A steel springboard (5), the steel springboard (5) being arranged on the top of the cantilever (2) and having a protective net (501) installed on one side of the steel springboard (5), the bottom of the steel springboard (5) being connected to the top of the first clamp (3), and during installation, the steel springboard (5) is supported on the main steel structure (1) via the ear plate (101) and the cantilever (2), and the first clamp (3) and the second clamp (4) are kept away from the top of the steel springboard (5) to open up a movable space on the steel springboard (5).

2. A fixed erection structure for a cantilevered steel springboard according to claim 1, characterized in that: The cantilever (2) comprises a cantilever member (201) and a diagonal brace (202) which are hinged to each other, and an angle is formed between the cantilever member (201) and the diagonal brace (202), so as to form a triangular support structure at the bottom of the steel springboard (5); Wherein, one end of the cantilever member (201) away from the diagonal brace (202) is forked and the fork is hinged to the ear plate (101), the first clamp (3) is sleeved on the outside of the cantilever member (201), and one end of the diagonal brace (202) away from the cantilever member (201) is connected to the second clamp (4).

3. A fixed erection structure for a cantilevered steel springboard according to claim 2, characterized in that: The first clamp (3) comprises a cross beam (301) and a hoop (302) which are hinged to each other, the cross beam (301) being used to abut against the bottom of the steel beam (100), and the hoop (302) being used to abut against the top of the steel beam (100), a fixing screw (303) passing through one end of the cross beam (301) and one end of the hoop (302), and a hinged joint (304) connected to one end of the diagonal brace (202) being fixed on the outer side of the hoop (302).

4. The fixed erection structure for a cantilevered steel springboard according to claim 3 is characterized in that: The second clamp (4) comprises a bolt rod (401) and a pair of clamps (400) located on both sides of the bolt rod (401), the two pair of clamps (400) being distributed on both sides of the cantilever (201), and a limiting screw (402) for inserting the steel springboard (5) is fixed on the outer sides of the two pair of clamps (400) away from the bolt rod (401).

5. The fixed erection structure for cantilevered steel springboard according to claim 4, characterized in that: A fixing steel sheet (403) is provided at the bottom of the steel springboard (5); the fixing steel sheet (403) is in the shape of a double-hole plate, and the double holes are used to pass the limiting screw rod (402) to limit the two pair of clamps (400).

6. The fixed erection structure for cantilevered steel springboard according to claim 4, characterized in that: A limiting hole (502) for inserting the limiting screw (402) is provided inside the steel springboard (5), and a fastening nut (503) threadably matched with the limiting screw (402) is inserted inside the limiting hole (502).

7. The fixed erection structure for a cantilevered steel springboard according to claim 2, characterized in that: The outer side of the diagonal brace (202) is provided with a lifting ring (7), a steel cable (6) passing through the lifting ring (7), and a pigment rubber bag (8) fixedly connected to the steel cable (6), wherein both ends of the steel cable (6) are respectively tied to the steel beam (100), and the pigment rubber bag (8) is filled with color powder. When the cantilever (2) falls off, the cantilever (2) is pulled on the steel beam (100) by the steel cable (6), and the pigment rubber bag (8) and the lifting ring (7) are driven to be squeezed against each other, so as to release the color powder.

8. The fixed erection structure for cantilevered steel springboard according to claim 7, characterized in that: A trumpet mouth (9) is fixed inside the pigment rubber bag (8), an end of the trumpet mouth (9) passes through the pigment rubber bag (8) and a rubber plug (901) is inserted into the end, and a traction rope (902) fixedly connected to the inner wall of the pigment rubber bag (8) is fixed to one end of the rubber plug (901) located inside the trumpet mouth (9).

9. The fixed erection structure for cantilevered steel springboard according to claim 7, characterized in that: The steel beam (100) is provided with concave load-bearing clamps (11) and lock buckles (13) for locking one end of the steel cable (6) at intervals on the outside. A flange plate (12) with holes for passing the steel cable (6) is fixed on the outside of the load-bearing clamp (11). During installation, one end of the steel cable (6) surrounds the load-bearing clamp (11), and its folded portion is locked by the lock buckle (13).

10. The fixed erection structure for cantilevered steel springboard according to claim 7, characterized in that: A wedge-shaped plate (14) fixedly connected to the diagonal support (202) is fixed on the outside of the lifting ring (7); the length of the wedge-shaped plate (14) is greater than the width of the pigment rubber bag (8); when the pigment rubber bag (8) is pulled, the wedge-shaped plate (14) cooperates with the lifting ring (7) to limit the position of the pigment rubber bag (8).

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