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EP-4741602-A1 - PIN FOR COUPLING AN ACCESSORY TO A FORMWORK PANEL AND SYSTEM COMPRISING SAME

EP4741602A1EP 4741602 A1EP4741602 A1EP 4741602A1EP-4741602-A1

Abstract

The present invention relates to a pin for coupling an accessory to a formwork panel, comprising a head and an elongated body attached to the head. The elongated body is formed by a cylindrical body and by a flat wedge face which is inclined with respect to the longitudinal axis. The wedge face has a greater width at the lower end and the distance between the wedge face and the opposite cylindrical surface decreases in the direction to the lower end. The elongated body comprises elastic means configured such that, in a standby state in the absence of external forces, a projecting portion of the elastic means protrudes a specific distance from the cylindrical surface of the cylindrical body opposite the wedge face. The invention also relates to a system comprising the pin.

Inventors

  • ARDILA LOPEZ, GERMÁN
  • RODILLA MERCADO, Daniel

Assignees

  • Encofrados J. Alsina, S.A.

Dates

Publication Date
20260513
Application Date
20230705

Claims (17)

  1. A pin (10) for coupling an accessory (100) to a formwork panel, comprising a head and an elongated body attached integrally to the head, which extends a certain length until ending in a lower end, characterized in that the elongated body is formed for the most part by a cylindrical body (11) and by a wedge face (12), configured as a flat face inclined with respect to the longitudinal axis of the cylindrical body, with an inclination such that the wedge face (12) has a greater width at the lower end than at the end closest to the head and such that the distance between the wedge face (12) and the cylindrical surface opposite the wedge face of the elongated body decreases in the direction from the end closest to the head to the lower end, and in that the elongated body comprises elastic means (13) configured such that, in a standby state in the absence of external forces, a projecting portion (14) of the elastic means (13) protrudes a specific distance from the cylindrical surface of the cylindrical body (11) opposite the wedge face (12).
  2. The pin (10) according to claim 1, characterized in that the elastic means (13) are configured such that in a non-standby state in which the projecting portion (14) is subjected to an external compressive force equal to or greater than a predetermined compressive force, all or part of this projecting portion (14) completely or partially enters the inside of the elongated body of the pin (10), and when said force ceases, the projecting portion (14) of the elastic means (13) returns to its standby state, protruding the specific distance from the cylindrical surface of the cylindrical body (11).
  3. The pin (10) according to any one of the preceding claims, characterized in that the elastic means (13) are a linear spring bent in several segments in which the projecting portion (14) which protrudes from the cylindrical surface of the cylindrical body (11) in the standby state has a curved shape with a maximum between two branches (14a, 14b) of different slope and sign, the slope being smaller in the branch (14b) closer to the lower end of the elongated body.
  4. The pin (10) according to any one of the preceding claims, characterized in that the elongated body comprises in a segment of the cylindrical surface opposite the wedge face (12) a longitudinal slit or slot (15) in which the elastic means (13) are arranged and from which the projecting portion (14) protrudes in the standby state.
  5. The pin (10) according to claim 4, characterized in that the longitudinal slit or slot (15) penetrates the wedge face (12) going through same.
  6. The pin (10) according to claim 5, characterized in that the lower end of the slit or slot (15) is provided with a widening (15a) having dimensions suitable for the passage therethrough of a safety element.
  7. The pin (10) according to any one of the preceding claims, characterized in that the wedge face (12) has an inclination comprised between 2 and 6 degrees, preferably 4 degrees, with respect to the longitudinal axis of the cylindrical body (11).
  8. The pin (10) according to any one of the preceding claims, characterized in that the head of the pin (10) is configured as a cylindrical side surface provided with two curved notches (18) opposite one another, in which one notch is provided on the side of the wedge face (12) and the other on the opposite side.
  9. The pin (10) according to any one of the preceding claims, characterized in that the head of the pin (10) has, at its lower end, at which it is attached to the elongated body of the pin (10), two lower flat stop surfaces (17), projecting in cantilever fashion from the elongated body of the pin (10).
  10. A system for coupling an accessory (100) to a formwork panel provided with a rib (90) having a cylindrical through hole (91) vertically going through same, wherein the system comprises a pin (10) according to any one of the preceding claims and a connecting part (20) comprising: - two clamp profiles (21), flat and parallel to one another, U-shaped, the opening (22) of which has suitable dimensions to receive, by way of fitting, a segment of the front border of a rib (90) of a formwork panel, with the separation distance between the upper arm (23) and the lower arm (24) of the U shape being equal to or greater than the thickness of the rib, - a first flat attachment plate (25) perpendicular to the two clamp profiles (21), arranged between the two upper arms (23) of the two clamp profiles (21) to which it is integrally attached, provided with a first through hole (27) with a contour suitable for the passage therethrough of the elongated body of the pin (10), and - a second flat attachment plate (26) perpendicular to the two clamp profiles (21), arranged between the two lower arms (24) of the two clamp profiles (21) to which it is integrally attached, provided with a second through hole (28) with a contour suitable for the passage therethrough of a part of the elongated body of the pin (10).
  11. The system according to claim 10, characterized in that the first through hole (27) has a contour formed for the most part by a circular arch segment (31) except for a straight segment (32) having a length equal to the maximum width of the wedge face (12) of the elongated body of the pin (10), and wherein approximately in the middle of the circular arch segment (31), the contour has a protuberance (33) having dimensions suitable for the passage therethrough of the most protruding part of the projecting portion (14) of the elastic means of the pin (10).
  12. The system according to claim 11, characterized in that the second through hole (28) has a circular contour formed for the most part by a circular arch segment (34) except for a straight segment (35) having a length smaller than the length of the straight segment (32) of the contour of the first through hole (27).
  13. The system according to claims 11 and 12, characterized in that the first through hole (27) and the second through hole (28) are offset relative to one another with respect to the straight segments (32, 35) of the contours thereof in accordance with the inclination of the wedge face (12) of the pin (10) such that an imaginary plane containing the upper edges (32a, 35a) of the two straight segments (32, 35) is parallel to the plane of the wedge face (12) of the pin (10).
  14. The system according to any one of claims 11 to 13, characterized in that the bottom of the opening (22) of each of the two clamp profiles (21), formed by the segment of the profile joining the upper arm (23) and the lower arm (24), has a bulge (29) in the central portion thereof towards the inside of the opening (22).
  15. The system according to any one of claims 11 to 14, characterized in that each of the two lower arms (24) of the two clamp profiles (21) has an extension (30) in a direction opposite the respective upper arm (23) which is provided with a through hole (36; 37).
  16. The system according to any one of claims 11 to 15, characterized in that it comprises at least one rib (90) of a formwork panel, provided with a cylindrical through hole (91) in a direction perpendicular to the upper surface and to the lower surface of the rib (90).
  17. The system according to claim 16, characterized in that the cylindrical through hole (91) provided in the rib (90) has a cylindrical bushing (92) arranged inside the same.

Description

Technical field of the invention The present invention relates to a pin for coupling a construction accessory, for example, a cantilever bracket, a brace, etc., to a formwork panel, and particularly to the rib of a panel. The formwork panel is one of those used in forming concrete structures, and has a formwork face made of a phenolic material board, which is the face that will be in contact with the concrete until it sets and acquires certain strength. Around the formwork face, the panel has a metal frame which provides support to a series of ribs or cross members (horizontal profiles) and uprights (vertical profiles) which are arranged on the face opposite to the formwork face and together form the framework of the panel that has to withstand the stresses to which the panel is subjected during the different phases of concreting. Preferably, a connecting part intended to be placed in a rib of a panel and designed to collaborate with the pin, both components forming a system for coupling accessories to the framework of the formwork panel, is also disclosed. In particular, the pin is indicated for placement through a cylindrical sleeve or bushing inserted into one of the several holes vertically going through the ribs of a formwork panel, which holes are created for the purpose of hanging virtually any type of accessory from the ribs. Background of the invention Several formwork panel designs are known today. Most formwork panels have a framework formed by a metal frame and several metal profiles arranged horizontally from side to side, called ribs or cross members, and some vertical profiles, called uprights, arranged between two cross members or between a cross member and the frame. In some of these formwork panels, at least some of the ribs have some through holes in which bushings are inserted. In practice, these holes are used to hang any type of accessory. In some cases, a pin having a cylindrical body is placed inside the bushing, such that the lower end of the pin is below the rib, and the head of the pin, having a cross-section larger than the cross-section of the hole, is above it. A safety element, for example, an R-shaped pin or wedge, is usually placed going through the lower end of the pin in a hole made to that end, so that the pin cannot disengage from the rib and the accessory to be placed is tied to the formwork panel through a cord attached to the head and to the lower end of the pin which goes through a rib or an upright. Examples of this type of pin are described in patent documents KR20180056176-A and KR10-0955302-B1. In other cases, the accessories to be coupled to the formwork panel already have ends that are integral with the accessory and have a fork shape, with two elongated, more or less cylindrical protuberances. These two protuberances, which extend vertically in the position of use of the accessory, are inserted into two through holes which the rib already has, and thus the accessory is hung from the rib of the panel. A small hole through which an R-shaped safety pin or similar safety element is placed goes through the lower ends of the two protuberances in order to prevent the fork from coming out of the holes of the rib if the panel moves. There are also other types of pin- and wedge-based supports which are hung from the ribs or uprights of the panel, but their assembly is cumbersome for the operators and in many cases involves the need to use tools. Sometimes, clips or clamps are used the jaws of which have profiles adapted to the cross-sections of the uprights so that they are held on the panel and the accessories can be hung from same, however, the clips or clamps are not usually conceived for that purpose, but rather to attach the panels to one another by their frames. To that end, an objective of the present invention is to disclose a simpler alternative the purpose of which is to simplify the assembly of an accessory, enabling it to be hung from a rib of a formwork panel, provided with a hole with a bushing, ensuring the safety of the accessory and the panel at all times. Description of the invention To respond to needs indicated above, a pin for coupling an accessory to a formwork panel is disclosed. The pin comprises a head and an elongated body attached integrally to the head, which extends a certain length until ending in a lower end. The pin object of the invention is characterized in that the elongated body is formed for the most part by a cylindrical body and by a wedge face, configured as a flat face inclined with respect to the longitudinal axis of the cylindrical body. The inclination of the wedge face is such that the wedge face has a greater width at the lower end than at the end closest to the head of the pin, and such that the distance between the wedge face and the cylindrical surface opposite the wedge face of the elongated body decreases in the direction from the end closest to the head to the lower end. Furthermore, the elongated body comprises elasti