MXPA96003938A - Concrete form with seguri bar - Google Patents

Abstract

The present invention relates to a concrete form having a frame with a first pair of external frame members and a second pair of external frame members. The first pair of external frame members is disposed perpendicular to the second pair of external frame members, such that the first and second pairs of external frame members define a substantially rectangular shape. the concrete form has two internal frame members connected between two of the outer frame members, the internal frame members being separated to define a rectangular box area between them. The concrete form has a flat concrete forming member fixed to the outer frame and a support member with a pair of end portions and a middle portion disposed between the end portions. The support member is connected with the first and second internal frame members, such that the middle portion of the support member is separated from the concrete forming member by a first distance, and such that the end portions of the member of support are separated from the concrete forming member by a second distance smaller than the first distance

Description

CONCRETE FORM WITH SAFETY BAR BACKGROUND OF THE INVENTION The present invention relates to modular concrete forms of the type used to form cavities in which concrete can be poured. A conventional concrete form consists of a frame that has two pairs of parallel external steel rails, with one pair of rails perpendicular to another pair of rails to form a rectangular frame. The frame can have a number of parallel internal rails that connect to the external rails to form a number of rectangular frames inside the frame. In the frame a concrete forming plate is secured, which can be made of plywood, for example. A number of these conventional concrete shapes are typically placed adjacent to one another, and sometimes one on top of the other to form cavities of different shapes and sizes in which wet concrete can be poured. When placed in this manner, the concrete forms are securely held together, such as by screws or wedges passing through holes or slots formed in the outer rails of the adjacent concrete forms, such that the pressure of the concrete Wet concrete does not alter the position of concrete forms. When the concrete dries, the concrete forms are removed and can be reused.

SUMMARY OF THE INVENTION The present invention relates to a concrete form with one or more internal support members connected between the adjacent internal rails, and to a method for retro-fitting a previously existing concrete form with one or more of these support members. A concrete form according to the invention can have an external frame with a first pair of external frame members and a second pair of external frame members, the first pair of external frame members being arranged perpendicular to the second pair of frame members. external, in such a way that the first and second pairs of external frame members define a rectangular shape. The concrete form has at least two internal frame members connected between two of the outer frame members to define a rectangular box area, and a flat concrete forming member is attached to the outer frame. The concrete form can have a support member with a pair of end portions and a middle portion disposed between the end portions, and the support member can be non-linear, and can be connected to the internal frame members, such that one of the end portions is separated from the concrete forming member by a first distance, and such that the middle portion of the non-linear support member is separated from the concrete forming member by a second greater distance than the first distance. The non-linear support member may be provided in the form of a rod having two semicircular ends. The semicircular ends may each define a plane substantially parallel to the plane defined by the concrete forming member, and may also pass each one through one of the internal frame members twice. Alternatively, the non-linear support member could have one or more linear threaded ends instead of curved ends. A concrete form in accordance with the invention may have a frame formed of external and internal frame members that forms a number of rectangular frames within the frame, including a pair of external frames having three sides defined by the outer frame members, and a fourth side defined by one of the internal frame members, and a plurality of internal frames having two sides defined by the external frame members and two sides defined by a pair of the internal frame members. The concrete form has a plurality of support members connected to the internal frame members, such that the boxes include a plurality of boxes that are not obstructed by the support members, and a plurality of security boxes through which one of the support members is disposed. The unobstructed and safety boxes are placed in such a way that each of the safety boxes is separated from another of the safety boxes by at least one of the boxes without obstructions. The invention also relates to a method for retro-fitting a support member to a previously existing concrete form, which includes the steps of forming a hole in a first internal frame member of the previously existing concrete form, forming a hole in the former. a second internal frame member of the previously existing concrete form, placing a support member such that the first end of the support member passes through the hole of the first inner frame member, and in such a manner that the second end of the support member pass through the hole of the second internal frame member, and secure the support member to the first and second internal frame members to maintain the position of the support member. These and other features and advantages of the present invention will become more apparent to the ordinarily skilled in the art, in view of the detailed description of the preferred embodiment, which is made with reference to the drawings, a brief description of which is further provided. ahead.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates a first embodiment of a concrete form in accordance with the invention. Figure 2 illustrates a second embodiment of a concrete form according to the invention. Figure 3 is a front view of a portion of the concrete shapes of Figures 1 and 2. Figure 4 is a side view of the portion of the concrete forms taken along lines 4-4 of the Figure 3. Figure 5 is a front view of a portion of an alternative embodiment of a concrete form in accordance with the invention. Figure 6 is a perspective view of an internal rail of the concrete shapes of Figures 1 and 2.

Detailed Description of a Preferred Modality A frontal view of a preferred embodiment of a concrete form 10 according to the invention has been illustrated in Figures 1 and 2. Concrete form 10 is a modular unit that can be placed adjacent to other forms of concrete to form a concrete forming wall or enclosure. Typically a number of shapes are placed side by side, and they can also be placed one on top of the other. As an example, a typical concrete shape can have a width of approximately 61 centimeters and a height of approximately 2.42 meters (see Figure 2). Referring to Figure 1, the concrete shape 10 has a frame composed of a first pair of external frame members in the form of rails 12, 14 shown horizontally in Figure 1, and a second pair of external frame members in the shape of rails 16, 18, shown vertically in Figure 1. The outer frame members 12-18 may be in the form of relatively thin steel rails having a width of 5.08 centimeters or 7.62 centimeters. Each of the external rails 16, 18 can be composed of a single rail or a number of rails longitudinally joined together. The outer rails 12-18 may have holes or slots formed therein to accommodate screws or wedges to securely hold a number of concrete shapes 10 together. The particular design of the rails 12-18 is not considered important for the invention. The frame of the concrete form 10 illustrated in Figure 1 has six internal frame members in the form of steel rails 20-30, each of which has a first end connected to the external rail 16, and a second end connected to the external rail 18. The internal rails 20 -30 can be connected to the external rails 16, 18 by any suitable element, such as welding. As shown in Figure 6, each of the internal rails 20-30 is L-shaped, consisting of a pair of sides 32, 34, arranged perpendicular to each other. Each end of the side 32 has a horizontal groove 36 formed therein, and an upper end portion 38 that is angled slightly outwardly. In the embodiment illustrated in Figure 1, the internal rails 20-30 are aligned parallel to each other and perpendicular to the external rails 16, 18, to define a number of rectangular frames 40-52. Boxes 40-52 include two external boxes 40, 52 and five internal boxes 42-50. The outer box 40 has three sides that are defined by the external rails 12, 16, 18, and a side that is defined by the internal rail 20. The outer box 52 has three sides that are defined by the external rails 14, 16, 18, and a side that is defined by the internal rail 30.

Each of the inner frames 42-50 has two sides defined by the outer rails 16, 18, and two sides defined by a respective pair of the inner rails 20-30. The frame of the concrete form 10 is attached to a flat concrete forming member in the form of a plate 60, such as plywood or a relatively thin steel sheet, having a rectangular shape corresponding to the rectangular shape defined by the external rails 12-18. If it consists of plywood, the concrete forming plate 60 can be attached to the frame by threaded screws in a number of fasteners 62 welded or otherwise attached to the frame. The screws can also be screwed into the plate 60 by a number of holes 64 in the internal rails (see Figure 6). If it is composed of steel, the concrete forming plate 60 can be welded to the frame at different points. Still referring to the embodiment illustrated in Figure 1, the concrete form 10 has three non-linear members, in the form of steel support rods 70, 72, 74, which can be used as handles to carry the concrete form 10, and as safety devices to which harness hooks or other devices can be attached to prevent falls, to prevent workers from injuring themselves as a result of falling from the concrete form 10 when stacked with other shapes to a significant height. The horizontal position of the vertically extending support rods 70, 72, 74 is offset from the center of the concrete form 10 to make it easier to take the shape 10 when the support rods 70, 72, 74 are used as handles, and when the shape 10 is carried with the external rails 16, 18 in a generally vertical plane parallel to the floor. The support rod 70 is disposed through the internal box 42; the support rod 72 is disposed through the internal box 46; and the support rod 74 is disposed through the inner box 50. As used herein, the term "safety box" is used to refer to a box having a support rod disposed therethrough, and the The term "unobstructed box" is used to refer to a box that does not have a support leg disposed through it. In the concrete form 10, the two outer boxes 40, 52 are boxes without obstructions, and the five internal boxes 42-50 include three safety boxes 42, 46, 50. Each of the safety boxes 42, 46, 50 it is separated from another of the safety boxes 42, 46, 50, by at least one of the unobstructed boxes 44, 48. Referring to Figures 3 and 4, the structure of one of the support rods 70 is shown. The support rod 70, which has a circular cross-section, has an elongated middle portion 80 with a linear central axis, two alginate portions 82, and two semicircular end portions 84. Each of the end portions 84 passes through each of the internal frame members 20, 22, twice, by means of a pair of holes 86 formed in each of the internal frame members 20, 22 (see Figure 6). As shown in Figure 4, the distance between the middle portion 80 of the support rod 70 and the concrete forming plate 60, as indicated by an arrow 90, is greater than the distance between the end portions 84 of the rod. of support 70 and the concrete forming plate 60, as indicated by an arrow 92. The greater tolerance between the middle portion 80 of the support rod 70 and the plate 60, facilitates the attachment of safety hooks or other devices to prevent the falls, and the use of the support rod 70 as a handle to bring the concrete shape 10. The ends 84 of the support rod 70 extend through the internal rails 20, 22 twice to prevent rotation of the the support rod 70 and maintain it in the position shown in Figure 4. As shown in Figure 4, the middle portion 80 of the support rod 70 does not extend outwardly beyond the outer edges of the inner rails. , 22. During the fa concrete form 10 illustrated in Figure 1, the. ends 84 of each of the support rods 70, 72, 74 are inserted first in the holes 86, in the adjacent internal rails 20-30, and then the adjacent internal rails 20-30 are attached to the external rails 16, 18 , such as by welding. When a number of concrete forms that incorporate support rods are placed together to form a wall or similar structure, the support rods are generally separated in the boxes of the concrete forms, so that there is always a support rod located near a worker, to which the worker can attach a fall protection device, regardless of the location of the worker on the wall. Figure 2 illustrates a second embodiment of a concrete form that is identical to concrete form 10 of Figure 1, except that the concrete form of Figure 2 has eight boxes instead of seven boxes, and has three internal boxes without obstructions instead of two internal boxes without obstructions. The concrete shapes illustrated in Figures 1 and 2 are preferably manufactured in such a way that each of the boxes has a height of 30.48 centimeters and a width of 60.96 centimeters, and therefore, the embodiment of Figure I would have a height not standard of 2.13 meters, while the modality of Figure 2 would have a more conventional height of 2.44 meters, although for the invention it is not important the exact number of frames and its exact height and width. With respect to Figures 1 and 2, these illustrate the preferred configuration where, regardless of the height of any particular concrete form, the outer boxes have no obstructions, and there are at least one and no more than two internal boxes without obstructions between any two safety boxes. As shown in Figure 1, the concrete form 10 conveniently includes a reinforcement 94 that is strategically placed in each of the safety boxes 42, 46, and 50. The reinforcements 94 will be understood as integrally associated with the frame members. 22, 26, and 30, respectively, and rail 18, by welding or the like. By placing the reinforcements in one of the two corners of each of the safety boxes 42, 46, and 50 closest to the support rods 70, 72, and 74, the shape is reinforced to improve safety. Figure 5 illustrates an alternative support rod 100 that can be retro-fitted into previously existing concrete shapes. Referring to Figure 5, the support rod 100 has an elongated middle portion 102 with a linear central axis, two angled portions 104, a first crimped or flattened end 106, and a second end with a threaded portion 108 on which it is attached. securing a nut 110. The support rod 100 is shown attached to a pair of adjacent inner rails 112, 114 of a previously existing concrete shape 120 to which a concrete forming plate 122 is attached. The distance between the middle portion 102 of the support rod 100 and the concrete forming plate 122 is greater than the distance between the end portions 106, 108 and the concrete forming plate 122, to facilitate the attachment of safety hooks or other devices to prevent falls, and for the use of the support rod 100 as a handle to carry the concrete form. The rotation of the support rod 100 can be prevented by welding one or both of its ends 106, 108 to its respective internal rails 112, 114. Also, the nut 110 can be welded in points to the threaded portion 108 or inner rail 114 to prevent loosening. To retrofit one of the support rods 100 to a previously existing concrete shape, an orifice is formed, such as by drilling or drilling, in each of the two internal rails of the previously existing concrete form to which it is going to Attach the support rod 100. The support rod 100 is then placed through the holes until the flattened end 106 abuts firmly with the inner rail 112. The support rod 100 is then secured to the inner rails 112, 114 by the thread of the nut 110 on the end of the support rod 108, and by welding one or both ends of the support rod 100 and / or the nut 110, in such a way that the support rod 100 can not rotate, even when undergoes significant stresses, such as the connection of heavy objects to the middle portion 102 of the support rod 100 by means of a hook. Different modifications of the concrete forms described above can be made. For example, instead of providing the support rod 100 with a flattened end 106, both ends could be threaded and secured to the internal rails by nuts. . Those skilled in the art will be able to see further modifications and alternative embodiments of the invention in view of the above description. This description of both the original equipment modality and the retro-fitting modality, should be interpreted as illustrative only, and is for the purpose of teaching the experts in this field the best mode for realizing the invention. The details of the structure and method can be varied substantially without departing from the spirit of the invention, and the exclusive use of all modifications falling within the scope of the appended claims is reserved.

Claims (28)

1. A concrete form, which comprises: a frame having a first pair of external frame members and a second pair of external frame members, the first pair of external frame members being disposed substantially perpendicular to the second pair of external frame members , such that the first and second pairs of external frame members define a substantially rectangular shape; a first internal frame member connected between two of the external frame members; a second internal frame member connected between the two mentioned external frame members, and separated from the first internal frame member to define a substantially rectangular box area; a flat concrete forming member fixed to the frame, the concrete forming member having a shape substantially equal to the substantially rectangular shape defined by the outer frame members; a support member having a pair of end portions and a middle portion disposed between those end portions, the support member connecting with the first and second internal frame members to be disposed closer to one of the rails than the other of the rails.

2. A concrete form as defined in claim 1, wherein the support member is non-linear, the support member connecting with the first and second internal frame members, such that one of the end portions of the The support member is separated from the concrete forming member by a first distance, and in such a way that the middle portion of the support member is separated from the concrete forming member by a second distance greater than the first distance.

3. A concrete form as defined in claim 2, wherein the non-linear support member comprises a rod having a circular cross-section.

A concrete form as defined in claim 2, wherein the non-linear support member is positioned in such a manner that both end portions of the non-linear support member are separated from the concrete forming member by the first distance.

5. A concrete form as defined in claim 2, wherein the middle portion of the non-linear support member has a substantially linear central axis.

6. A concrete form as defined in claim 1, wherein each of the ends of the support member comprises a semicircular curved rod.

7. A concrete form as defined in claim 6, wherein each of the semicircular curved rods defines a plane that is substantially parallel to a plane defined by the concrete forming member.

8. A concrete form as defined in claim 1, wherein each of the ends of the support member passes through one of the internal frame members twice.

9. A concrete form as defined in claim 1, wherein one end of the support member comprises a threaded portion.

10. A concrete form as defined in claim 9, which additionally comprises a nut secured to the threaded portion of the support member.

11. A concrete form as defined in claim 10, which additionally comprises a weld that secures the nut to the threaded portion of the support member.

12. A concrete form as defined in claim 1, wherein the support member is generally parallel to the two outer frame members, and connects with the first and second internal frame members to be disposed closer to one that from another of the two external frame members.

13. A concrete form, which comprises: a frame having a first pair of external frame members and a second pair of external frame members, the first pair of external frame members being disposed substantially perpendicular to the second pair of members of external frames, such that the first and second pairs of external frame members define a substantially rectangular shape; a plurality of support members; a flat concrete forming member fixed to the frame, the concrete forming member having a shape substantially equal to the rectangular shape defined by the outer frame members; and a plurality of internal frame members connected between two of the outer frame members, the internal frame members being substantially parallel to one another, such that the outer frame members and the two outer frame members form a plurality of frames. substantially rectangular boxes, including these boxes: a pair of external boxes having three sides defined by the external frame members and a fourth side defined by one of the internal frame members; a plurality of internal boxes having two sides defined by the external frame members and two sides defined by a pair of the internal frame members, including the internal and external frames: a plurality of unobstructed frames that are not obstructed by one of the support members; and a plurality of security boxes, each security box having one of the support members disposed through the security box, this support member being connected to two of the internal frame members that partially define the security box, positioning itself the unblocked and security boxes in such a way that the security boxes are separated from one of the security boxes by at least one of the boxes without obstructions.

14. A concrete form as defined in claim 13, wherein each of the outer boxes comprises an unobstructed box.

15. A form of concrete as defined in claim 13, wherein the unobstructed and safety boxes are placed in such a way that one of the safety boxes is separated from another of the safety boxes by a plurality of boxes without obstructions

16. A form of concrete as defined in claim 13, wherein the unobstructed and safety boxes are placed in such a way that at least one of the internal boxes comprises a box without obstructions.

17. A form of concrete as defined in claim 13, wherein the internal and external frame members define seven boxes that include two external boxes without obstructions and five internal boxes that include three clogged boxes and two boxes without obstructions.

18. A form of concrete as defined in claim 13, wherein the internal and external frame members define eight boxes that include two unobstructed external boxes and six internal boxes that include three clogged boxes and three boxes without obstructions.

19. A concrete form as defined in claim 13, wherein one of the support members comprises a non-linear support member having a pair of end portions and a middle portion disposed between the end portions, the non-linear support member with a pair of the internal frame members, such that one of the end portions of the non-linear support member is separated from the concrete forming member by a first distance, and in such a way that the portion The mean of the non-linear support member is separated from the concrete forming member by a second distance, the second distance being greater than the first distance.

20. A concrete form as defined in claim 19, wherein each of the ends of the non-linear support member comprises a semicircular curve rod.

21. A concrete form as defined in claim 20, wherein each of the semicircular curved rods defines a plane that is substantially parallel to a plane defined by the concrete forming member.

22. A concrete form as defined in claim 19, wherein each end of the non-linear support member passes through one of the internal frame members twice.

23. A concrete form as defined in claim 19, wherein one end of the non-linear support member comprises a linear threaded portion.

24. A concrete form as defined in claim 23, which further comprises a nut secured to the threaded portion of the non-linear support member.

25. A method for retrofitting a support member in a previously existing concrete form having a frame with a first pair of external frame members and a second pair of external frame members, the first pair of external frame members being disposed substantially perpendicular to the frame. second pair of external frame members, such that the first and second pairs of outer frame members define a substantially rectangular shape; a first internal frame member connected between two of the external frame members; a second internal frame member connected between the two outer frame members, and which is separated from the first internal frame member to define a substantially rectangular box area; and a flat concrete forming member fixed to the frame, the concrete forming member having a shape substantially identical to the rectangular shape defined by the external frame members, this method comprising the steps of: (a) forming a hole in the first member of internal frame of the previously existing concrete form; (b) forming a hole in the second internal frame member of the previously existing concrete form; (c) placing a support member having a first end and a second end in a position wherein the first end of the support member extends through the holes of the first inner frame member formed in step (a), and wherein the second end of the support member extends through the hole of the second inner frame member formed in step (b); and (d) securing the support member to the first and second internal frame members, such that the support member is held in the position defined in step (c).

26. A method as defined in the claim 25, wherein step (c) comprises the step of placing a non-linear support member having a first end, a second end, and a middle portion in a position where the first end of the support member extends through of the hole of the first inner frame member formed in step (a), wherein the second end of the support member extends through the hole of the second inner frame member formed in step (b), and wherein one of the ends of the non-linear support member is disposed at a first distance from the concrete forming member, and the middle portion of the non-linear support member is disposed at a second distance from the concrete forming member, the second distance being greater than the first distance.

27. A method as defined in the claim 26, wherein one end of the non-linear support member has a threaded portion, and wherein the step (d) comprises the step of attaching a nut to the threaded portion of the non-linear support member. A method as defined in claim 27, wherein step (d) further comprises the step of welding the nut to the threaded portion of the non-linear support member.