A chain pull-back device

Abstract

The present invention provides a chain pull-back device, comprising a fixing part (1), a pull-back part (2), and a chain part (3); wherein the fixing part (1) is fixed on a steel beam, and the chain part (3) is fixed on a floor deck; the pull-back part (2) applies force to the fixing part (1) and the floor deck through the chain part (3). Compared with the formwork support backing method in the prior art, the components are compact and the installation is more flexible and convenient, which can effectively save construction time; and because it can be reused, the cost is significantly lower.

Description

Technical Field

[0001] The present invention relates to the technical field of construction equipment, in particular to a fall chain pulling back device. Background Art

[0002] For high-rise buildings, especially super-high-rise buildings, the horizontal structure often uses reinforced truss floor slabs combined with steel truss decks. For some decks with larger spans, temporary supports are required. Existing technology uses formwork for back-supporting, but this method is complex to construct and affects construction timelines. Summary of the Invention

[0003] In order to at least solve the technical problems existing in the above background technology, the present invention provides a fall chain pulling back device.

[0004] A chain-reversing device comprises a fixing portion (1), a reversing portion (2), and a chain portion (3);

[0005] The fixing portion (1) is fixed to a steel beam, and the chain portion (3) is fixed to a floor deck; the pull-back portion (2) applies force to the fixing portion (1) and the floor deck via the chain portion (3).

[0006] Furthermore, the fixing portion (1) comprises a U-shaped base (101), a locking portion (102), and a connecting portion (103);

[0007] The U-shaped base (101) is combined with the steel beam, and the locking portion (102) is used to fix the U-shaped base (101) and the steel beam; the connecting portion (103) is provided on the U-shaped base (101) and is used to connect with one end of the chain portion (3).

[0008] Furthermore, the upper and lower surfaces of the U-shaped base (101) are both provided with aligned coupling holes, and the corresponding surface of the steel beam is provided with a coupling groove; the locking portion (102) passes through the coupling hole and the coupling groove in sequence to achieve the fixation of the U-shaped base (101) and the steel beam.

[0009] Furthermore, the chain portion (3) includes a first chain portion (301) and a second chain portion (302), and the second chain portion (302) includes at least one connecting chain;

[0010] One end of the first chain portion (301) is connected to the connecting portion (103), and the other end is connected to the pull-back portion (2); one end of the second chain portion (302) is connected to the floor decking plate, and the other end is connected to the pull-back portion (2).

[0011] Furthermore, the pull-back portion (2) comprises a first reel (201), at least one second reel (202), and a main body (203); the first reel (201) and the second reel (202) are both rotatably mounted on the main body (203);

[0012] The first reel (201) is connected to one end of the first chain portion (301), and at least one of the second reels (202) is respectively connected to a connecting chain in the second chain portion (302).

[0013] Furthermore, the main body (203) comprises a support plate (2031) and a rotating shaft (2032); wherein, the number of the rotating shaft (2032) is one or matches the number of the first reel (201) and the second reel (202).

[0014] Furthermore, at least one end of the rotating shaft (2032) is provided with a locking pin, and corresponding positions on the support plate (2031) are provided with multi-stage locking grooves, and the locking pin is adapted to the locking grooves.

[0015] Furthermore, the main body (203) further includes a return spring (2033), the return spring (2033) is arranged in a slide groove in the support plate (2031), and both ends of the return spring (2033) are respectively connected to the rotating shaft (2032).

[0016] Furthermore, the spacing distance between at least one of the second reels (202) is substantially equal to the width of the first reel (201).

[0017] Furthermore, the first reel (201) and / or the second reel (202) comprises a first receiving groove (2011), a second receiving groove (2012) and a friction portion (2013); the friction portion (2013) comprises a base portion (20131) and a protruding portion (20132);

[0018] Particularly, the base (20131) is mostly located in the second receiving groove (2012), and a small part is located in the first receiving groove (2011); the protrusion (20132) is fixed to the base (20131), and the degree of protrusion from the first reel (201) and / or the second reel (202) can be changed under the push of the base (20131).

[0019] Compared with the formwork support backing method in the prior art, the chain-reversing pulling device in the present invention has compact components and is more flexible and convenient to install, which can effectively save construction time; and because it can be reused, the cost is significantly lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the main structure of a chain-reversing pulling device disclosed in an embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of the fixing portion (1) disclosed in an embodiment of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the chain part (3) disclosed in an embodiment of the present invention;

[0024] Figure 4 This is a structural schematic diagram (1) of the pullback portion (2) disclosed in an embodiment of the present invention;

[0025] Figure 5 This is a structural schematic diagram (2) of the pull-back portion (2) disclosed in an embodiment of the present invention;

[0026] Figure 6 This is a structural schematic diagram (3) of the pull-back portion (2) disclosed in an embodiment of the present invention;

[0027] Figure 7 This is a structural schematic diagram (four) of the pullback portion (2) disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0029] The terms used in the examples of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a," "the," and "the" used in the examples of this application and the appended claims are also intended to include plural forms, and unless the context clearly indicates otherwise, "a plurality" generally includes at least two.

[0030] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0031] It should be understood that although the terms "first," "second," "third," etc. may be used in the embodiments of this application to describe "...," these "..." should not be limited to these terms. These terms are merely used to distinguish "...." For example, "first..." could also be referred to as "second...", and similarly, "second..." could also be referred to as "first..." without departing from the scope of the embodiments of this application.

[0032] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1 , Figure 1 This is a schematic diagram of the main structure of a chain pull-back device disclosed in an embodiment of the present invention. Figure 1 As shown, a chain-retracting device according to an embodiment of the present invention comprises a fixing portion (1), a retracting portion (2), and a chain portion (3);

[0035] The fixing portion (1) is fixed to a steel beam, and the chain portion (3) is fixed to a floor deck; the pull-back portion (2) applies force to the fixing portion (1) and the floor deck via the chain portion (3).

[0036] In an embodiment of the present invention, the chain pull-back device of the present invention installs the fixed part (1) on a high steel beam, connects the chain part (3) to the lower floor deck, and then connects the fixed part (1) and the chain part (3) in series with the pull-back part (2) to form a whole, thereby applying a tensile force to the floor deck to achieve a supporting effect on the floor deck. Compared with the formwork support and pull-back method in the prior art, the components are compact and the installation is more flexible and convenient, which can effectively save construction time; and because it can be reused, the cost is significantly lower.

[0037] Furthermore, the fixing portion (1) comprises a U-shaped base (101), a locking portion (102), and a connecting portion (103);

[0038] The U-shaped base (101) is combined with the steel beam, and the locking portion (102) is used to fix the U-shaped base (101) and the steel beam; the connecting portion (103) is provided on the U-shaped base (101) and is used to connect with one end of the chain portion (3).

[0039] In the embodiment of the present invention, the present invention utilizes the base of the U-shaped structure to connect with the steel beam, and by simultaneously contacting the upper and lower surfaces of the steel beam, and further fixing it with the locking portion (102), the stability of the connection can be significantly improved, thereby being able to withstand greater tension. The connecting portion (103) is conducive to the stable overlap of the chain portion (3).

[0040] like Figure 2 As shown, the connecting portion (103) can be provided on the upper surface of the U-shaped base (101), and in particular, can be provided at a position on the upper surface close to the U-shaped region. Also, the locking portion (102) can be combined with the upper surface of the U-shaped base (101), for example, the upper surface of the U-shaped base (101) is provided with a combining hole (not shown in the figure), and the corresponding surface of the steel beam is provided with a combining groove (not shown in the figure), and the lower end of the locking portion (102) is passed through the combining hole and placed in the combining groove to achieve locking and fixing; and the locking portion (102) can be threadedly connected to the combining hole and / or the combining groove.

[0041] Furthermore, the upper and lower surfaces of the U-shaped base (101) are both provided with aligned coupling holes, and the corresponding surface of the steel beam is provided with a coupling groove; the locking portion (102) passes through the coupling hole and the coupling groove in sequence to achieve the fixation of the U-shaped base (101) and the steel beam.

[0042] In the embodiment of the present invention, the difference from the aforementioned fixing method is that the locking portion (102) can completely penetrate the upper and lower surfaces of the U-shaped base (101). In this case, it is only necessary to fix the penetrating end of the locking portion (102) (for example, by fixing with a nut) to achieve a more stable locking effect.

[0043] Further, refer to Figure 3 As shown, the chain portion (3) includes a first chain portion (301) and a second chain portion (302), and the second chain portion (302) includes at least one connecting chain;

[0044] One end of the first chain portion (301) is connected to the connecting portion (103), and the other end is connected to the pull-back portion (2); one end of the second chain portion (302) is connected to the floor decking plate, and the other end is connected to the pull-back portion (2).

[0045] In the embodiment of the present invention, the chain portion (3) is divided into two parts. This structural design realizes that the fixed portion (1), the pull-back portion (2), and the chain portion (3) form a complete physical connection of the fall chain pull-back device that can apply tension to the floor deck. The number of connecting chains in the second chain portion (302) can be freely set based on the construction design standards.

[0046] Furthermore, the pull-back portion (2) comprises a first reel (201), at least one second reel (202), and a main body (203); the first reel (201) and the second reel (202) are both rotatably mounted on the main body (203);

[0047] The first reel (201) is connected to one end of the first chain portion (301), and at least one of the second reels (202) is respectively connected to a connecting chain in the second chain portion (302).

[0048] In the embodiment of the present invention, referring to Figure 4 As shown, the pull-back portion (2) of the present invention includes a rotatable first reel (201) and a second reel (202), and the two types of reels are respectively used to connect with the first chain portion (301) and the second chain portion (302) in the chain portion (3). Since both types of shafts are rotatable, the main body (203) of the pull-back portion (2) does not need to bear torsional force, thereby avoiding damage.

[0049] Furthermore, the main body (203) comprises a support plate (2031) and a rotating shaft (2032); wherein, the number of the rotating shaft (2032) is one or matches the number of the first reel (201) and the second reel (202).

[0050] In an embodiment of the present invention, Figure 4 The first reel (201) and the second reel (202) are shown as being arranged as rotating shafts. In addition, the first reel (201) and the second reel (202) can also be arranged on one rotating shaft at the same time, or each reel can be independently provided with a rotating shaft. The present invention will not be described in detail here.

[0051] Furthermore, at least one end of the rotating shaft (2032) is provided with a locking pin, and corresponding positions on the support plate (2031) are provided with multi-stage locking grooves, and the locking pin is adapted to the locking grooves.

[0052] In an embodiment of the present invention, the locking pin and locking slot (not shown) mate to facilitate operator adjustment of the tension of the chain retraction device. Furthermore, to further facilitate operator adjustment, the locking pin may include a handle. The specific structural configurations of the locking pin, locking slot, and handle may be based on established designs from the prior art and are not limited by the present invention.

[0053] Furthermore, the main body (203) further includes a return spring (2033), the return spring (2033) is arranged in a slide groove in the support plate (2031), and both ends of the return spring (2033) are respectively connected to the rotating shaft (2032).

[0054] Furthermore, the spacing distance between at least one of the second reels (202) is substantially equal to the width of the first reel (201).

[0055] In the embodiment of the present invention, referring to Figure 5 As shown, after the chain-returning device is used, the rotating shafts of the first reel (201) and the second reel (202) are pulled outward along the chute, and the reset spring (2033) is in a stretched state (only the left half is shown in the figure); when the chain-returning device is removed after use, the reset spring (2033) drives the rotating shaft to shrink inward along the chute, thereby driving the first reel (201) and the second reel (202) to move closer and shrink. At the same time, since the spacing between the second reels (202) is substantially equal to the width of the first reel (201), at this time, the first reel (201) will be clamped by the adjacent second reel (202), so that the retraction portion (2) is automatically tightened.

[0056] In addition, springs can also be provided inside the first reel (201) and the second reel (202), so that the reels can be automatically reeled when the chain retraction device is removed after use. The specific structure is not described in detail.

[0057] It should be noted that "substantially equal" in the present invention means that the spacing distance between adjacent second scrolls (202) is greater than the width of the first scroll (201), but the difference is within a smaller threshold, and the threshold can be freely set.

[0058] Further, refer to Figure 6 、 7 As shown, the first reel (201) and / or the second reel (202) comprises a first receiving groove (2011), a second receiving groove (2012) and a friction portion (2013); the friction portion (2013) comprises a base portion (20131) and a protruding portion (20132);

[0059] Particularly, the base (20131) is mostly located in the second receiving groove (2012), and a small part is located in the first receiving groove (2011); the protrusion (20132) is fixed to the base (20131), and the degree of protrusion from the first reel (201) and / or the second reel (202) can be changed under the push of the base (20131).

[0060] In an embodiment of the present invention, the reel may include a first receiving groove (2011), a second receiving groove (2012), and a friction portion (2013). The first receiving groove (2011) is used for winding the connecting chain, and the second receiving groove (2012) is used to accommodate the friction portion (2013). As the connecting chain is wound, the connecting chain gradually contacts the friction portion (2013) and pushes it toward the outside of the reel. The protrusion (20132) is pushed out of the reel body and can then contact the adjacent reel, thereby increasing the contact friction force and making the pull-back portion (2) more stable after automatic tightening.

[0061] Wherein, the base (20131) and the raised portion (20132) of the friction portion (2013) can both be configured as elastic structures, but preferably the elasticity value of the base (20131) is lower than the elasticity value of the raised portion (20132).

[0062] The working principle of the present invention is:

[0063] The operator connects and fixes the two ends of the chain pull-back device, i.e., the fixed part (1) and the chain part (3), to the steel beam and the floor deck respectively, and then turns the handle to change the locking groove where the locking pin is located, thereby adjusting the tightness of the two ends of the chain part (3). After the adjustment is completed, the locking groove where the locking pin is located is no longer changed. At this time, the operator can perform concrete pouring operations on the floor deck. During the pouring process, the operator can still adjust the tightness of the two ends of the chain part (3) according to actual conditions. When the concrete solidifies and reaches the construction index, use appropriate equipment to cut off the several connecting chains at the bottom end of the chain part (3), i.e., the second chain part (302). The exposed connecting chain residues can be polished and plastered. At this time, the first reel (201) and the second reel (202) installed by the first chain portion (301) and the second chain portion (302) will automatically reel. During the reeling process, the return spring (2033) will also drive the rotating shaft to retract inward along the slide groove, thereby driving the first reel (201) and the second reel (202) to move closer and retract. When the first reel (201) and the second reel (202) are automatically reeled to a certain extent, the reeled connecting chain in the first receiving groove (2011) will contact the base (20131) of the friction portion (2013) in the second receiving groove (2012) and push it toward the outside of the reel. The protrusion (20132) is pushed to protrude from the reel body and then can contact the adjacent reel, thereby increasing the contact friction force, so that the stability of the pull-back portion (2) after automatic tightening is stronger. The operator can conveniently carry the folded chain retraction device away by removing the fixing portion (1).

[0064] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A chain pull-back device, characterized in that: It comprises a fixing part (1), a pulling part (2) and a chain part (3); The fixing part (1) is fixed on the steel beam, and the chain part (3) is fixed on the floor deck; the pull-back part (2) applies force to the fixing part (1) and the floor deck through the chain part (3); The fixing portion (1) comprises a U-shaped base (101), a locking portion (102), and a connecting portion (103); The U-shaped base (101) is combined with the steel beam, and the locking portion (102) is used to fix the U-shaped base (101) and the steel beam; the connecting portion (103) is arranged on the U-shaped base (101) and is used to connect with one end of the chain portion (3); The chain part (3) comprises a first chain part (301) and a second chain part (302), wherein the second chain part (302) comprises at least one connecting chain; Wherein, one end of the first chain part (301) is connected to the connecting part (103), and the other end is connected to the pull-back part (2); one end of the second chain part (302) is connected to the floor decking plate, and the other end is connected to the pull-back part (2); The pull-back portion (2) comprises a first reel (201), at least one second reel (202), and a main body (203); the first reel (201) and the second reel (202) are both rotatably mounted on the main body (203); Wherein, the first reel (201) is connected to one end of the first chain portion (301), and at least one of the second reels (202) is respectively connected to a connecting chain in the second chain portion (302); The main body (203) comprises a support plate (2031) and a rotating shaft (2032); wherein the number of the rotating shaft (2032) is one or matches the number of the first reel (201) and the second reel (202).

2. The chain-reversing device according to claim 1, characterized in that: The upper and lower surfaces of the U-shaped base (101) are both provided with aligned coupling holes, and the corresponding surface of the steel beam is provided with a coupling groove; the locking portion (102) passes through the coupling hole and the coupling groove in sequence to achieve the fixation of the U-shaped base (101) and the steel beam.

3. The chain-reversing device according to claim 1, characterized in that: At least one end of the rotating shaft (2032) is provided with a locking pin, and a corresponding position on the support plate (2031) is provided with a multi-stage locking groove, and the locking pin is adapted to fit the locking groove.

4. The chain-reversing device according to claim 3, characterized in that: The main body (203) further comprises a return spring (2033), wherein the return spring (2033) is arranged in a slide groove in the support plate (2031), and both ends of the return spring (2033) are respectively connected to the rotating shaft (2032).

5. The chain-reversing device according to claim 4, characterized in that: The spacing distance between at least one of the second reels (202) is substantially equal to the width of the first reel (201).

6. A chain-reversing device according to any one of claims 1 to 5, characterized in that: The first reel (201) and / or the second reel (202) comprises a first receiving groove (2011), a second receiving groove (2012) and a friction portion (2013); the friction portion (2013) comprises a base portion (20131) and a protruding portion (20132); Particularly, most of the base (20131) is located in the second receiving groove (2012), and a small part is located in the first receiving groove (2011); the protrusion (20132) is fixed to the base (20131), and the degree of protrusion from the first reel (201) and / or the second reel (202) can be changed under the push of the base (20131).

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