High-rise building core tube inner mold supporting system

The central lifting frame and telescopic parts drive the formwork to support and dismantle, and the connecting rod and spring mechanism are used to realize the automatic insertion and dismantling of the formwork, solving the cumbersome problems of support and demolition in the existing technology, and improving the support and mold removal efficiency of the formwork in the core cylinder of the high-rise building.

CN120506083APending Publication Date: 2025-08-19CHINA MCC17 GRP CO LTD
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202510993194.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-18
Publication Date
2025-08-19

AI Technical Summary

Technical Problem

In the formwork support in the core cylinder of high-rise buildings, targeted support operations cannot be carried out as the height increases, and the support and demolition operations are cumbersome and the efficiency is low.

Method used

The central lifting frame, transverse and longitudinal telescopic parts are used to drive the formwork to support and remove, and the automatic insertion and disengagement of the formwork is achieved through the connecting rod and spring mechanism, and combined with the fastening and fixing of the angle formwork and the locking and locking of the pin, simplifying the support and mold removal process.

Benefits of technology

The support and mold removal efficiency of the formwork inside the core cylinder of high-rise buildings is improved, ensuring the planarity of the inner wall of the core cylinder, the structure is simple and easy, and the support and mold removal operations are carried out efficiently.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120506083A_ABST
    Figure CN120506083A_ABST
Patent Text Reader

Abstract

The invention discloses a high-rise building core tube inner formwork supporting system, and relates to the field of building construction, a longitudinal telescopic piece and a transverse telescopic piece are adopted to drive a transverse formwork and a longitudinal formwork to carry out supporting operation respectively, and during supporting, when the corresponding formwork is close to the supporting position, the transverse formwork and the longitudinal formwork are connected through the transverse telescopic piece and the longitudinal telescopic piece. The corner formworks can be driven to be close to the supporting corner position through the connecting rods, after the corner formworks enter the supporting position, the formworks can be inserted between the corner formworks as the formworks continuously approach the supporting position, and supporting operation of the inner formworks is completed. When dismantling is needed, when the corresponding formwork is far away from the core tube, the corresponding formwork is far away from the core tube firstly, the corner formwork is still kept at the position under the action of the spring, when the formwork returns to the spring and cannot guarantee that the corner formwork is kept at the internal corner of the core tube, the corner formwork is driven to be far away from the core tube, and then the formwork dismantling operation is completed. The center lifting frame is locked after ascending to the corresponding height, supporting and form stripping operation is repeated, the supporting and form stripping operation efficiency is high, and the structure is simple and easy to implement.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, in particular to a core tube inner formwork support system for a high-rise building. Background Art

[0002] With the rapid development of high-rise buildings in my country, concrete shear wall structures have been increasingly used. In the design of concrete shear wall structures, elevator shafts, pipe shafts, kitchens, and bathrooms are often designed as concrete core tubes.

[0003] A search revealed CN201245975Y, which discloses a variable-angle formwork support system for the inner wall of a concrete core tube. The system comprises inner formwork connected end-to-end in a closed fashion, with supports and scaffolding tubes installed within the inner formwork. Corner formwork is detachably connected between adjacent inner formworks at the variable angle. However, in practice, this technology lacks the ability to provide targeted support as the core tube height increases, and requires the inner formwork to be supported by supports and scaffolding tubes, making support and removal cumbersome. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-rise building core tube inner formwork support system, and the present invention provides the following technical solutions, including:

[0005] Central lifting frame, on which are distributed transverse and longitudinal telescopic parts, the ends of the transverse telescopic parts are installed with longitudinal templates, and the ends of the longitudinal telescopic parts are installed with transverse templates;

[0006] Both ends of the horizontal template facing the central lifting frame are equipped with horizontal hinge seats, which are rotatably connected to the horizontal connecting rod via a pin shaft. Both ends of the vertical template facing the central lifting frame are equipped with longitudinal hinge seats, which are rotatably connected to the longitudinal connecting rod via a pin shaft.

[0007] An angle template is connected between the horizontal template and the vertical template at corresponding positions. A longitudinal guide seat and a horizontal guide seat are installed on the angle template. The longitudinal guide seat is fitted with a longitudinal movable seat through a spring sliding motion, and the horizontal guide seat is fitted with a horizontal movable seat through a spring sliding motion.

[0008] The longitudinal connecting rod and the longitudinal moving seat are connected through a pin shaft, and the transverse connecting rod and the transverse moving seat are connected through a pin shaft.

[0009] In a more optimized solution: a longitudinal buckle groove structure and a transverse buckle groove structure are provided on the side of the corner template facing the central lifting frame, longitudinal buckle bodies are provided at both ends of the longitudinal template, the longitudinal buckle bodies and the longitudinal buckle groove structure are arranged along the thickness of the longitudinal template and adapt to each other, and transverse buckle bodies are provided at both ends of the transverse template, the transverse buckle bodies and the transverse buckle groove structure are arranged along the thickness of the transverse template and adapt to each other.

[0010] In a more optimized solution: the transverse telescopic member and the longitudinal telescopic member both include an overhanging block fixed on the template and facing the central lifting frame, and a constraint plate fixed on the top and bottom of the overhanging block. The central lifting frame is equipped with a retaining frame arranged perpendicularly to the corresponding template and a driving member arranged parallel to the corresponding template. The constraint plate and the retaining frame are slidably fitted and connected to the retaining frame by a spring. An external extrusion block is slidably fitted in the retaining frame, and a screw is connected to the end of the driving member. The external extrusion block is matched on the screw. The movement direction of the external extrusion block relative to the retaining frame is perpendicular to the movement direction of the overhanging block relative to the retaining frame, and the side where the external extrusion block and the overhanging block contact is a vertical inclined surface.

[0011] In a more optimized solution: a connecting seat is mounted on the lead screw, and connecting pins are matched on both the upper and lower sides of the connecting seat;

[0012] The outer extrusion block is provided with a through groove parallel to the corresponding template and an adjustment groove perpendicular to the corresponding template. A fork block is slidably fitted in the adjustment groove. The side of the fork block is provided with an oblique moving groove. The oblique moving groove and the connecting pin are slidably fitted. An elastic card block is provided on the side of the fork block facing the central lifting frame.

[0013] In a more optimized solution: the fork block includes connector 1, connector 2 and a middle frame, connector 1 and connector 2 are respectively installed on both sides of the middle frame, connector 1 and connector 2 are slidably fitted in the adjustment groove, and connector 2 is connected to the elastic card block.

[0014] In a more optimized solution: the elastic card block includes a card plate, a moving body is installed on the top of the card plate, a spring is installed on the top of the moving body, a slot is provided on the side of the connecting body facing the central lifting frame, the spring and part of the moving body are installed in the slot, a constraint block is installed at the slot, the constraint block is slidably mounted on the outside of the moving body, a card body is provided on the central lifting frame, and the side where the card plate and the card body are in contact is a ratchet surface.

[0015] In a more optimized solution: the corner template and the central lifting frame are connected by a telescopic rod, the telescopic rod includes a fixed part and a movable part, one end of the movable part is fixed on the corner template, the fixed part is connected to the central lifting frame, the side of the movable part away from the corner template is socketed in the fixed part, and the outer sides of the movable part and the fixed part are evenly provided with constraint holes along the length direction, and a pin is socketed in the constraint hole.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention uses longitudinal and transverse telescopic parts to drive the transverse and longitudinal templates respectively to perform support operations. During support, when the corresponding template approaches the support position, the connecting rod will drive the corner template to the support corner position. After entering the support position, as the template continues to approach the support position, the template will be inserted between the corner templates to complete the support operation of the inner template. When demolition is required, when the corresponding template moves away from the core tube, it will first move away from the core tube and the corner template will remain in this position under the action of the spring. When the template returns to the spring and can no longer ensure that the corner template remains at the inner corner of the core tube, it will drive the corner template away from the core tube, thereby completing the demolding operation. The central lifting frame moves up to the corresponding height and is locked. The support and demolding operations are repeated. The support and demolding operations are efficient and the structure is simple and easy to operate.

[0018] 2. The present invention completes the corresponding connection by adopting a snap-fitting method at the end of the corner template and the corresponding template to ensure the flatness of the inner wall of the core tube. During support, after the corner template is in place, a pin is inserted into the constraint hole to complete the fixation of the corner template; when removing the template, the pin is first removed and then the telescopic part is reset.

[0019] 3. The telescopic part of the present invention adopts a driving part to drive the screw, which moves the external extrusion block relative to the retaining frame and acts on the protruding block to move outward, and moves the corresponding template outward for supporting operations. When the template is removed, the external extrusion block moves in the opposite direction, and the protruding block is reset under the action of the spring to complete the automatic reset of the template. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A top view of the core tube inner mold support system of the present invention;

[0021] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0022] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0023] Figure 4 It is a structural diagram of the telescopic rod;

[0024] Figure 5 It is a structural cross-sectional view of the telescopic member;

[0025] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0026] Figure 7 for Figure 6 Schematic diagram of the structure of the elastic block;

[0027] Figure 8 It is a structural relationship diagram of the fork block and the elastic clamp block;

[0028] Figure 9 It is a structural diagram of the connecting seat;

[0029] Figure 10 It is a structural diagram of the external extrusion block;

[0030] Figure 11 It is a structural diagram of the overhanging block;

[0031] Figure 12 Schematic diagram of the structure of the cage;

[0032] Figure 13 This is a structural relationship diagram of the longitudinal guide seat and the longitudinal movable seat.

[0033] In the figure: 10, central lifting frame; 11, horizontal telescopic member; 12, longitudinal telescopic member; 13, longitudinal template; 14, horizontal template; 15, horizontal hinge seat; 16, horizontal connecting rod; 17, longitudinal hinge seat; 18, longitudinal connecting rod; 19, corner template; 110, longitudinal guide seat; 111, horizontal guide seat; 112, longitudinal movable seat; 113, horizontal movable seat; 118, restraining plate; 119, extension block; 120, retaining frame; 121, driving member; 122, external extrusion block; 12 3. Screw; 124. Connecting seat; 125. Through slot; 126. Adjusting slot; 127. Oblique moving slot; 128. Connecting pin; 129. Elastic clamping block; 1291. Clamping plate; 1292. Moving body; 1293. Constraint block; 1294. Clamping body; 130. Fork block; 131. Connecting body 1; 132. Connecting body 2; 133. Middle frame; 134. Longitudinal buckle body; 135. Horizontal buckle body; 20. Telescopic rod; 21. Fixed part; 22. Movable part; 23. Latch. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Example 1

[0036] like Figures 1 to 3 As shown, a high-rise building core tube inner formwork support system includes:

[0037] The central lifting frame 10 has a transverse telescopic member 11 and a longitudinal telescopic member 12 distributed thereon. A longitudinal template 13 is installed at the end of the transverse telescopic member 11 , and a transverse template 14 is installed at the end of the longitudinal telescopic member 12 .

[0038] A transverse hinge seat 15 is installed at both ends of the transverse template 14 on the side facing the central lifting frame 10, and a transverse connecting rod 16 is rotatably connected to the transverse hinge seat 15 through a pin shaft. A longitudinal hinge seat 17 is installed at both ends of the longitudinal template 13 on the side facing the central lifting frame 10, and a longitudinal connecting rod 18 is rotatably connected to the longitudinal hinge seat 17 through a pin shaft.

[0039] like Figure 13 As shown, a corner template 19 is connected between the corresponding transverse template 14 and the longitudinal template 13, and a longitudinal guide seat 110 and a transverse guide seat 111 are installed on the corner template 19. The longitudinal guide seat 110 is fitted with a longitudinal movable seat 112 through a spring sliding fit, and the transverse guide seat 111 is fitted with a transverse movable seat 113 through a spring sliding fit.

[0040] The longitudinal connecting rod 18 and the longitudinal movable seat 112 are connected via a pin shaft, and the transverse connecting rod 16 and the transverse movable seat 113 are connected via a pin shaft.

[0041] During support, the transverse template 12 and the longitudinal template 13 are moved outward by the longitudinal telescopic member 12 and the transverse telescopic member 11, and the corner template 19 is driven outward at the same time. The corner template 19 will move to the support position first. When it reaches the support position, it will be blocked. The corresponding template will drive the corresponding moving seat to squeeze the spring through its own connecting rod. The template will enter the inner side of the two corner templates 19 in a straight line along the support direction until the support surface of the corner template 19 is flush with the support surface of the template.

[0042] When removing the mold, the telescopic part drives the corresponding template to move inward, and the corner template 19 will first remain at the inner corner of the core tube under the action of the spring. When the spring is not enough to ensure that the corner template 19 is in the inner corner position, the template will drive the corner template 19 to separate from the core tube through the connecting rod, completing the removal of the core tube.

[0043] Example 2

[0044] In Example 1, Figure 4 As shown, the corner template 19 and the central lifting frame 10 are connected by a telescopic rod 20. The telescopic rod 20 includes a fixed portion 21 and a movable portion 22. One end of the movable portion 22 is fixed to the corner template 19, and the fixed portion 21 is connected to the central lifting frame 10. The side of the movable portion 22 away from the corner template 19 is socketed in the fixed portion 21. Constraint holes are evenly distributed on the outer sides of the movable portion 22 and the fixed portion 21 along the length direction, and a pin 23 is socketed in the constraint hole.

[0045] During support, the transverse template 14 and the longitudinal template 13 are moved outward by the longitudinal telescopic member 12 and the transverse telescopic member 11, and the corner template 19 is driven outward at the same time. The corner template 19 will move to the support position first. When it reaches the support position, it will be blocked. The corresponding template will drive the corresponding moving seat compression spring through its own connecting rod. The template will enter the inner side of the two corner templates 19 in a straight line along the support direction until the support surface of the corner template 19 is flush with the support surface of the template, and the pin 23 will be inserted into the constraint hole to ensure the integrity of the inner template.

[0046] When removing the mold, first remove the pin 23, and the telescopic part will drive the corresponding template to move inward. The corner template 20 will first be kept at the inner corner of the core tube under the action of the spring. When the spring is not enough to ensure that the corner template 20 is in the inner corner position, the template will drive the corner template 19 to separate from the core tube through the connecting rod, completing the removal of the core tube.

[0047] Example 3

[0048] In embodiment 1, since the corner template 19 of the supporting surface and the supporting surface of the template are the structure of the upper and lower through seams, the structure of the upper and lower through seams easily causes the supporting surface to stagger inside and outside, so the inventors made the following improvements: Figure 2 and Figure 3 As shown, the corner template 19 is provided with a longitudinal buckle groove structure and a transverse buckle groove structure on the side facing the central lifting frame 10, and longitudinal buckle bodies 134 are provided at both ends of the longitudinal template 13. The longitudinal buckle bodies 134 and the longitudinal buckle groove structure are arranged along the thickness of the longitudinal template 13 and are adapted to each other. Transverse buckle bodies 135 are provided at both ends of the transverse template 14. The transverse buckle bodies 135 and the transverse buckle groove structure are arranged along the thickness of the transverse template 14 and are adapted to each other.

[0049] Example 4

[0050] In Example 1, Figure 1 、 Figures 5 to 12 As shown, the transverse telescopic member 11 and the longitudinal telescopic member 12 both include an overhanging block 119 fixed on the template and facing the central lifting frame 10 and a constraint plate 118 fixed on the top and bottom of the overhanging block 119. The central lifting frame 10 is equipped with a retaining frame 120 arranged perpendicularly to the corresponding template and a driving member 121 arranged parallel to the corresponding template. The constraint plate 118 and the retaining frame 120 are slidably matched and connected to the retaining frame 120 by a spring. An external extrusion block 122 is slidably matched inside the retaining frame 120. A screw 123 is connected to the end of the driving member 121. The external extrusion block 122 is matched on the screw 123. The movement direction of the external extrusion block 122 relative to the retaining frame 120 and the movement direction of the overhanging block 119 relative to the retaining frame 120 are perpendicular to each other.

[0051] The screw 123 is equipped with a connecting seat 124, and the upper and lower sides of the connecting seat 124 are equipped with connecting pins 128.

[0052] The outer extrusion block 122 is provided with a through groove 125 provided in parallel with the corresponding template and an adjustment groove 126 provided perpendicular to the corresponding template. A fork block 130 is slidably fitted in the adjustment groove 126. The side of the fork block 130 is provided with an oblique moving groove 127. The oblique moving groove 127 and the connecting pin 128 are slidably fitted. An elastic block 129 is provided on the side of the fork block 130 facing the central lifting frame 10.

[0053] The fork block 130 includes a connector 131, a connector 2 132 and a middle frame 133. The connector 131 and the connector 2 132 are respectively installed on both sides of the middle frame 133. The connector 131 and the connector 2 132 are slidably fitted in the adjustment groove 126. The connector 2 132 is connected to the elastic block 129.

[0054] The elastic block 129 includes a card plate 1291, a moving body 1292 is installed on the top of the card plate 1291, a spring is installed on the top of the moving body 1292, a slot is provided on the side of the connecting body 132 facing the central lifting frame 10, the spring and part of the moving body 1292 are installed in the slot, a constraint block 1293 is installed at the slot, the constraint block 1293 is slidably mounted on the outside of the moving body 1292, a card body 1294 is provided on the central lifting frame 10, and the side where the card plate 1291 and the card body 1294 are in contact is a ratchet surface.

[0055] During implementation, the driving member 121 drives the screw 123 to rotate, drives the connecting seat 124 to move along the length direction of the screw 123, and drives the fork block 130 to move close to the central lifting frame 10 through the movement of the connecting pin 128 along the oblique moving groove 127, and drives the elastic block 129 to contact the card body 1294 and then drives the outer extrusion block 122 to move along the length direction of the screw 123, and then moves the outward block 119 relative to the retaining frame 120, so as to adjust the horizontal template 12 and the longitudinal template 12. The plate 13 moves outward for support, and the clamping plate 1291 will release the force of the external extrusion block 122 on the lead screw when the external extrusion block 122 acts in the opposite direction of the external extrusion block 122; when the mold is removed, the external connecting seat 124 is moved away from the side of the external extrusion block 119 by reversing the lead screw 123, and the connecting seat 124 drives the elastic clamping block 129 to separate from the clamping body 1294, and then drives the external extrusion block 122 away from the side of the external extrusion block 119, and the external extrusion block 119 is reset under the action of the spring to complete the mold removal operation.

[0056] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-rise building core tube inner formwork support system, characterized in that: include: A central lifting frame (10), wherein a transverse telescopic member (11) and a longitudinal telescopic member (12) are distributed on the central lifting frame (10), a longitudinal template (13) is installed at the end of the transverse telescopic member (11), and a transverse template (14) is installed at the end of the longitudinal telescopic member (12); A transverse hinge seat (15) is installed at both ends of the side of the transverse template (14) facing the central lifting frame (10), and a transverse connecting rod (16) is rotatably connected to the transverse hinge seat (15) via a pin shaft. A longitudinal hinge seat (17) is installed at both ends of the side of the longitudinal template (13) facing the central lifting frame (10), and a longitudinal connecting rod (18) is rotatably connected to the longitudinal hinge seat (17) via a pin shaft. A corner template (19) is connected between the corresponding transverse template (14) and the longitudinal template (13), and a longitudinal guide seat (110) and a transverse guide seat (111) are installed on the corner template (19). The longitudinal guide seat (110) is slidably engaged with a longitudinal movable seat (112) via a spring, and the transverse guide seat (111) is slidably engaged with a transverse movable seat (113) via a spring. The longitudinal connecting rod (18) and the longitudinal movable seat (112) are connected via a pin shaft, and the transverse connecting rod (16) and the transverse movable seat (113) are connected via a pin shaft.

2. The inner formwork support system for the core tube of a high-rise building according to claim 1, characterized in that: A longitudinal buckle groove structure and a transverse buckle groove structure are provided on one side of the corner template (19) facing the central lifting frame (10); longitudinal buckle bodies (134) are provided at both ends of the longitudinal template (13); the longitudinal buckle bodies (134) and the longitudinal buckle groove structure are arranged along the thickness of the longitudinal template (13) and are mutually adapted; and transverse buckle bodies (135) are provided at both ends of the transverse template (14); the transverse buckle bodies (135) and the transverse buckle groove structure are arranged along the thickness of the transverse template (14) and are mutually adapted.

3. The inner formwork support system for the core tube of a high-rise building according to claim 1 is characterized by: The transverse telescopic member (11) and the longitudinal telescopic member (12) both include an extension block (119) fixed on the template and facing the central lifting frame (10) and a constraint plate (118) fixed on the top and bottom surfaces of the extension block (119). The central lifting frame (10) is provided with a retaining frame (120) arranged perpendicularly to the corresponding template and a driving member (121) arranged parallel to the corresponding template. The constraint plate (118) and the retaining frame (120) are slidably matched and connected to the retaining frame (120) via a spring. An external extrusion block (122) is slidably matched inside the retaining frame (120). A lead screw (123) is connected to the end of the driving member (121). The external extrusion block (122) is matched on the lead screw (123). The movement direction of the external extrusion block (122) relative to the retaining frame (120) and the movement direction of the extension block (119) relative to the retaining frame (120) are perpendicular to each other.

4. The inner formwork support system for the core tube of a high-rise building according to claim 3 is characterized by: A matching connecting seat (124) is mounted on the lead screw (123), and connecting pins (128) are matched on both the upper and lower sides of the connecting seat (124); The outer extrusion block (122) is provided with a through groove (125) provided in parallel with the corresponding template and an adjustment groove (126) provided perpendicular to the corresponding template. A fork block (130) is slidably fitted in the adjustment groove (126). An oblique moving groove (127) is provided on the side of the fork block (130). The oblique moving groove (127) and the connecting pin (128) are slidably fitted. An elastic block (129) is provided on the side of the fork block (130) facing the central lifting frame (10).

5. The inner formwork support system for the core tube of a high-rise building according to claim 4 is characterized in that: The fork block (130) includes a connector 1 (131), a connector 2 (132) and a middle frame (133). The connector 1 (131) and the connector 2 (132) are respectively installed on both sides of the middle frame (133). The connector 1 (131) and the connector 2 (132) are slidably fitted in the adjustment groove (126). The connector 2 (132) is connected to the elastic block (129).

6. The inner formwork support system for the core tube of a high-rise building according to claim 5, characterized in that: The elastic card block (129) includes a card plate (1291), a moving body (1292) is installed on the top of the card plate (1291), a spring is installed on the top of the moving body (1292), a notch is provided on the side of the second connecting body (132) facing the central lifting frame (10), the spring and part of the moving body (1292) are installed in the notch, a constraint block (1293) is installed at the notch, the constraint block (1293) is slidably mounted on the outside of the moving body (1292), a card body (1294) is provided on the central lifting frame (10), and the side where the card plate (1291) and the card body (1294) contact each other is a ratchet surface.

7. The inner formwork support system for the core tube of a high-rise building according to claim 1 is characterized by: The corner template (19) and the central lifting frame (10) are connected via a telescopic rod (20).

8. The inner formwork support system for the core tube of a high-rise building according to claim 7, characterized in that: The telescopic rod (20) includes a fixed portion (21) and a movable portion (22), one end of the movable portion (22) is fixed to the corner template (19), the fixed portion (21) is connected to the central lifting frame (10), a side portion of the movable portion (22) away from the corner template (19) is inserted into the fixed portion (21), and the outer sides of the movable portion (22) and the fixed portion (21) are uniformly provided with constraint holes along the length direction, and a pin (23) is inserted into the constraint hole.

Citation Information

Patent Citations

  • Angle mould-changeable formwork support system for concrete core barrel inner wall

    CN201245975Y