CN116249817A - Aluminum pipe bracket - Google Patents

Aluminum pipe bracket Download PDF

Info

Publication number
CN116249817A
CN116249817A CN202280006516.XA CN202280006516A CN116249817A CN 116249817 A CN116249817 A CN 116249817A CN 202280006516 A CN202280006516 A CN 202280006516A CN 116249817 A CN116249817 A CN 116249817A
Authority
CN
China
Prior art keywords
pipe
tube
cross
holder
aluminum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202280006516.XA
Other languages
Chinese (zh)
Inventor
森本隆之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Forbiru Ltd
Original Assignee
Forbiru Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Forbiru Ltd filed Critical Forbiru Ltd
Publication of CN116249817A publication Critical patent/CN116249817A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/02—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means
    • E04G1/04—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means the members being exclusively poles, rods, beams, or other members of similar form and simple cross-section
    • E04G1/08—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means the members being exclusively poles, rods, beams, or other members of similar form and simple cross-section secured together by bolts or the like penetrating the members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/061—Shores or struts; Chocks telescopic with parts held together by positive means by pins
    • E04G25/063—Shores or struts; Chocks telescopic with parts held together by positive means by pins with safety devices to avoid the accidental loss or unlocking of the pin, e.g. chains attaching the pin to the prop
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/48—Supporting structures for shutterings or frames for floors or roofs
    • E04G11/50—Girders, beams, or the like as supporting members for forms
    • E04G11/54—Girders, beams, or the like as supporting members for forms of extensible type, with or without adjustable supporting shoes, fishplates, or the like
    • E04G11/56—Girders, beams, or the like as supporting members for forms of extensible type, with or without adjustable supporting shoes, fishplates, or the like of telescopic type
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/02—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means
    • E04G1/12—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means comprising members of special, e.g. composite, cross-section or with lugs or the like or lateral apertures for supporting or attaching other members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/48—Supporting structures for shutterings or frames for floors or roofs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/30—Scaffolding bars or members with non-detachably fixed coupling elements
    • E04G7/34—Scaffolding bars or members with non-detachably fixed coupling elements with coupling elements using positive engagement, e.g. hooks or pins

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Supports For Pipes And Cables (AREA)

Abstract

The invention provides an aluminum pipe bracket which is lighter and higher in rigidity than an iron pipe bracket. The aluminum pipe bracket (1) is provided with two pins (2A), the outer peripheral shape of the inner pipe (3) is any one of regular hexagon, regular octagon and regular decagon, the cross section area of the part which is not penetrated by the pins (2A) is more than 1.96 times of the cross section area of the same part of the inner pipe of the iron pipe bracket with the target size, on the other hand, the outer pipe (2) is an inner shape which can be inserted by the inner pipe (3), the cross section area of the part which is not penetrated by the pins (2A) is more than 1.35 times of the cross section area of the same part of the outer pipe of the iron pipe bracket with the target size, and the upper limit of the cross section area of the inner pipe (3) and the outer pipe (2) is set in a way that the total weight of the inner pipe (3) and the outer pipe (2) is lighter than the total weight of the inner pipe and the outer pipe of the iron pipe bracket with the target size. Satisfies a predetermined load, and can be greatly reduced in weight and increased in rigidity.

Description

Aluminum pipe bracket
Technical Field
The present invention relates to an aluminum pipe holder which is made of aluminum, is light in weight, has an adjustable length, and is high in rigidity as a whole.
Background
When constructing a concrete structure, concrete is poured into a form (Japanese: type). In this case, for example, a tube holder is used to support the form from below or from below during casting of the slab.
Conventionally, generally, the tube holder has a double tube structure, and the length thereof can be adjusted. In the length adjustment structure, adjustment holes are formed at the same interval in the axial direction in the diametrical direction of the portion where the outer tube and the inner tube are fitted, and in order to fix the fitting position at which the entire length of the tube holder is adjusted, an adjustment pin is inserted into the adjustment hole. In addition, in the conventional tube holder, a gasket that contacts the installation surface or the die plate surface is provided at an end portion of the outer tube and the inner tube opposite to the fitting portion.
The conventional pipe bracket having the above-described structure has a shaft rigidity, a compression resistance, and the like specified in Japanese Industrial Standards (JIS) and the like (hereinafter, these will be collectively referred to as "specified load"), and a heavy material such as steel pipe or iron is used as a material corresponding to the specified load, so that a lot of labor is required for transportation to the site when setting up a form.
In order to reduce the labor of such operators, patent document 1 proposes that at least the outer tube and the inner tube in the structure of the tube holder be made of an aluminum alloy.
That is, patent document 1 proposes a tube holder for a single tube made of an aluminum alloy, in which the outer diameter is smaller than the average outer diameter at both ends in the longitudinal direction, the wall thickness is thicker than the average wall thickness, the outer diameter is thicker than the average outer diameter at the center in the longitudinal direction, the wall thickness is thinner than the average wall thickness, and the outer diameter and the wall thickness change smoothly from both ends to the center.
As described in patent document 1, aluminum may be used if the weight is simply reduced, but if the material is changed, a predetermined load cannot be satisfied, and there is a possibility that the concrete may not be used, but the cast concrete may collapse together with the form in the field.
In patent document 1, the above-described structure is made of aluminum in a single tube to reduce the weight of the tube holder, but this structure has a problem that the length (height) cannot be adjusted.
For the above-described aspects, for example, a plurality of single tubes made of aluminum alloy of patent document 1 of a length type are prepared, and a plurality of single tubes of which the lengths are adjusted by combination are used, female screws are formed in opposite directions on inner circumferences of upper and lower ends of the single tubes, and bolts with male screws formed in opposite directions are screwed from axial centers on inner circumferences of end portions of the single tubes butted against each other to connect them.
That is, in the case of adopting the structure of patent document 1 in which a plurality of aluminum alloy single tubes (whether circular or square) are connected in the axial direction, there is a problem that a vertical load is concentrated on a bolt inserted for adjusting the length, bending deformation occurs, and a predetermined load cannot be satisfied as a whole.
In order to solve the problem of patent document 1, the present applicant has proposed an aluminum pipe holder described in patent document 2. According to patent document 2, the following structure is shown: the aluminum pipe bracket comprises: an aluminum outer tube having a pin insertion hole formed at one end in an axial direction into which a pin for fixing a position is inserted; and an aluminum inner tube inserted into the outer tube, wherein a plurality of position adjustment holes for pins to pass through are intermittently formed in an axial direction, wherein the thickness of each of the thinnest parts of the outer tube and the inner tube is set to be 1.5mm to 4.5mm, and the inner diameter of the inner tube is set to be 1.5 to 2.5 times the inner diameter of the iron inner tube meeting a target prescribed load.
In patent document 2, as a pipe holder made of iron in accordance with japanese industrial standard JIS, the following examples are given, which satisfy a prescribed (allowable) load from the use of extension of 9.8kN (1000 kg) to the use of shortening of 19.6kN (2000 kg): the outer diameter of the inner tube was 48.6mm (thickness 2.5mm: "inner diameter" 43.6 mm), the outer diameter of the outer tube was 60.5mm (thickness 2.3mm: "inner diameter" 55.9 mm), and the weight was 15.7kg, and examples of the structures of the inner tube and the outer tube of the aluminum tube holder satisfying the above-mentioned prescribed conditions were shown.
The inner diameter of the inner tube of patent document 2 was 65.4mm, which is 1.5 times the inner diameter (43.6 mm) of the inner tube of the iron tube holder, and the thickness of the thinnest part was 2.2mm (outer diameter 69.8 mm). Inner diameter of outer tube
Figure BDA0004133810670000021
The thickness of the thinnest part was set to 70.0mm and the thickness of the thinnest part was set to 2.2mm (outer diameter 74.4 mm).
With the structure of patent document 2, the weight of the iron pipe holder is 15.7kg, whereas the weight of the pipe holder 1 of the present invention is 11.4kg, and a weight of about 4kg can be reduced, and a predetermined (allowable) load from the use of 9.8kN (1000 kg) for elongation to 19.6kN (2000 kg) for shortening can be satisfied. That is, patent document 2 achieves a weight saving of about 25% with respect to the iron pipe holder.
However, patent document 2 focuses on achieving weight reduction by satisfying a predetermined load of an iron pipe holder, and does not have a structure having bending rigidity exceeding an upper limit of the predetermined load of the iron pipe holder.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 9-158500
Patent document 2: japanese patent No. 6467393
Disclosure of Invention
Problems to be solved by the invention
The problems to be solved are the following: the aluminum pipe holder of patent document 2 is lighter than the iron pipe holder and satisfies a predetermined load of the same specification as the iron pipe holder, but does not have rigidity equal to or higher than the predetermined load in quality.
Solution for solving the problem
In order to solve the above problems, an aluminum pipe holder according to the present invention comprises: an aluminum outer tube; an aluminum inner tube inserted into the outer tube; and a pin that is inserted into and pulled out from the outer peripheral surface of the outer tube and the outer peripheral surface of the inner tube, and that fixes a position where the entire height adjustment is performed by the insertion shaft length of the inner tube with respect to the outer tube, wherein the aluminum tube holder includes two pins, the outer peripheral shape of the inner tube is any one of regular hexagons, regular octagons, and regular decagons, and the cross-sectional area of a portion through which the pins do not pass is 1.96 times or more of the cross-sectional area of the same portion of the inner tube of the iron tube holder of a target size, and the inner tube is an inner shape into which the inner tube can be inserted, and the cross-sectional area of a portion through which the pins do not pass is 1.35 times or more of the cross-sectional area of the same portion of the outer tube of the iron tube holder of a target size, and the upper limit of the cross-sectional areas of the inner tube and the outer tube is set so that the total weight of the inner tube and the outer tube is lighter than the total weight of the inner tube and the outer tube of the iron tube holder of the target size.
ADVANTAGEOUS EFFECTS OF INVENTION
The present invention can achieve high rigidity beyond the upper limit of the prescribed load of the target iron pipe holder by overriding the fixed concept of aluminum=low rigidity (weak) in addition to achieving light weight while satisfying the prescribed load of the target iron pipe holder.
Further, in the case of using an iron pipe holder at a position satisfying the predetermined load but applying a load close to the upper limit value from the viewpoint of the predetermined load of japanese industrial standard JIS, whether the iron pipe holder having a large predetermined load, i.e., an increased size is further used (allowed) in consideration of safety or the number of pipe holders used per unit area is increased, as a result, the weight is increased in accordance with the amount of increase in size or the amount of increase in number.
In the case of the aluminum pipe holder according to the present invention, since the rigidity can be increased even if the weight ratio of the aluminum pipe holder to the total weight of the inner and outer pipes of the target iron pipe holder is small, the aluminum pipe holder according to the present invention is required to be increased in size in the case of the iron pipe holder, and in contrast, the aluminum pipe holder according to the present invention can cope with the case where the required number per unit area is smaller than the number of the iron pipe holders, and therefore, as a result, there is an advantage that the weight ratio of the entire field is large.
Drawings
Fig. 1 is an external view showing a schematic structure of an aluminum pipe holder according to the present invention.
Fig. 2 is an exploded view of the aluminum tube holder of the present invention.
Fig. 3 shows an inner tube of the aluminum tube holder of the present invention, fig. 3 (a) is an upper end view, and fig. 3 (b) is a front view.
Fig. 4 shows an inner tube of the aluminum tube holder of the present invention, fig. 4 (a) is a sectional view taken along line A-A of fig. 3, and fig. 4 (B) is a sectional view taken along line B-B of fig. 2.
Fig. 5 is a view showing an outer tube of the aluminum tube holder of the present invention.
Fig. 6 shows an outer tube of the aluminum tube holder of the present invention, fig. 6 (a) is a view from the C-direction of fig. 5, and fig. 6 (b) is a sectional view taken along line D-D of fig. 5.
Detailed Description
The present invention is an aluminum pipe holder, comprising: an aluminum outer tube; an aluminum inner tube inserted into the outer tube; and a pin that is inserted into and pulled out from the outer peripheral surface of the outer tube and the outer peripheral surface of the inner tube, and that fixes a position in which the entire height adjustment is performed by the insertion shaft length of the inner tube with respect to the outer tube, wherein the aluminum tube holder includes two pins, wherein the outer peripheral shape of the inner tube is any one of regular hexagons, regular octagons, and regular decagons, and the cross-sectional area of a portion through which the pins pass is 1.96 times or more of the cross-sectional area of the same portion of the inner tube of the iron tube holder of a target size, and wherein the outer tube is an internal shape into which the inner tube can be inserted, and wherein the cross-sectional area of a portion not through which the pins pass is 1.35 times or more of the cross-sectional area of the same portion of the outer tube of the iron tube holder of a target size, and wherein the upper limit of the cross-sectional areas of the inner tube and the outer tube is set such that the total weight of the inner tube and the outer tube is lighter than the total weight of the inner tube and the outer tube of the iron tube holder of the target size, thereby achieving the following object: the steel pipe support is lighter than the target steel pipe support, meets the prescribed load of the steel pipe support, and obtains rigidity above the prescribed load in quality.
In a conventional pipe holder, an inner pipe (waist pipe) is inserted (fitted) from above in the vertical direction with respect to an outer pipe (waist pipe), and the inner pipe is also called a fitting pipe, and therefore the outer diameter of the inner pipe is naturally smaller than that of the outer pipe, and the inner pipe located at the upper part in the vertical direction is easily bent when in use.
Since the aluminum pipe holder of the present invention is composed of the inner pipe and the outer pipe, the rigidity of the material needs to be sufficiently considered in addition to the thin outer diameter of the inner pipe. In patent document 2, the thickness of the inner tube and the inner diameter of the inner tube are specified based on the following ideas: if the inner diameter of the inner tube is set so as to exhibit a load bearing strength satisfying a predetermined load, the outer tube having a larger diameter than the inner tube is naturally set to follow the size thereof.
However, in patent document 2, the "thinnest thickness" in this condition is already 1.5mm to 4.5mm with respect to the thickness of the iron, and the inner diameter of the inner tube is 1.5 to 2.5 times the inner diameter of the inner tube of the tube holder made of iron, so that, in particular, the thickness "other than the thinnest thickness" is an excessive thickness that does not contribute to rigidity substantially in consideration of safety and satisfies these regulations, and there remains a room for further weight reduction in this respect.
As a result of a test for recognizing that a limit value at which bending occurs exceeding a prescribed load, the present invention focuses on the relationship between the cross-sectional area (and the allowable load) and the total weight, instead of specifying the content of the thinnest thickness of the inner tube and the inner diameter of the inner tube, which are employed in patent document 2.
Specifically, in the case of the present invention, the cross-sectional area of the portion of the inner tube through which the pin does not pass is 1.96 times or more the cross-sectional area of the same portion of the inner tube of the iron tube holder of the target size, and the cross-sectional area of the portion of the outer tube through which the pin does not pass is 1.35 times or more the cross-sectional area of the same portion of the outer tube of the iron tube holder of the target size. The lower limit value of the cross-sectional area is set so as to pay attention to the load bearing during the extension of the iron pipe holder that satisfies the target dimension.
If the cross-sectional area of the inner and outer tubes is larger than the cross-sectional area of the iron pipe holder of the target size, the predetermined load can be satisfied, but if the predetermined load of the iron pipe holder of the target size is satisfied and the total weight of the iron pipe holder of the target size is reduced, it is unnecessary to unnecessarily increase the outer diameter and the outer dimension (to be equivalent to the iron pipe holder of the target size).
When the cross-sectional area of the inner and outer pipes is smaller than the lower limit value, that is, when the cross-sectional area of the inner pipe at the portion where the pin does not pass through is smaller than 1.96 times the cross-sectional area of the same portion of the inner pipe of the iron pipe holder of the target size, the cross-sectional area of the outer pipe at the portion where the pin does not pass through is 1.35 times the cross-sectional area of the same portion of the outer pipe of the iron pipe holder of the target size, the weight can be reduced, but the predetermined load of the iron pipe holder of the target size cannot be satisfied.
On the other hand, the upper limit value of each of the cross-sectional areas of the inner and outer tubes can be set so as to be lighter than the total weight of the inner and outer tubes of the iron tube holder of the target size because the rigidity can be enhanced by enlarging the cross-sectional area as described above, but the advantage of aluminum is lost when the total weight of the inner and outer tubes is increased.
Two pins are used, and position adjustment holes corresponding to the respective pins are formed in positions of two opposite sides of the inner periphery of the inner tube, which are in contact with or close to the inner surface, in the inner tube having any one of a regular hexagon, a regular octagon, and a regular decagon in the outer peripheral shape, and the pins are inserted into the position adjustment holes, respectively.
For example, the inner tube has a thickened portion formed by thickening in a range of 1.5 to 2.0 times the thickness of the inner tube continuously with the thickness of the inner tube, at a portion (a portion other than a portion where the position adjustment hole is formed) where the pin does not pass through, of the outer peripheral shape of the inner tube when the outer peripheral shape is formed in a regular hexagon, a regular octagon, or a regular decagon. If the thickness of the thickened portion is less than 1.5 times the thickness of the inner tube, the lower limit value of the cross-sectional area is not satisfied, and thus the rigidity is insufficient, while if the thickness of the thickened portion is more than 2.0 times the thickness of the inner tube, the weight reduction may not be facilitated.
In the thickened portion, the thickened portion is not formed in the axial region where the position adjustment hole is formed and through which the pin passes, that is, the thickened portion is intermittently formed in the axial direction in accordance with the height of the pin.
By providing the thickening portion, the pin receiving the compressive load is reliably received by the thickening portion, and the inner tube is prevented from being bent in an extended state in which the outer diameter is smaller than that of the outer tube due to the thickening portion, and further, the weight can be reduced as compared with the iron tube holder, and the rigidity can be improved beyond the predetermined load of the iron tube holder of the same size.
As described above, in the present invention, as a result of using two pins and setting appropriate values by trial and error of the cross-sectional areas of the inner and outer tubes made of aluminum, the two characteristics of being lightweight and high rigidity can be distinguished from each other by the fact that the target iron tube holder is lightweight and satisfies a predetermined load.
Examples
A specific embodiment of the present invention will be described below with reference to fig. 1 to 6. Reference numeral 1 denotes an aluminum pipe holder (hereinafter referred to as a pipe holder) of the present invention for supporting a concrete pouring form, and has a main structure of an outer pipe 2 and an inner pipe 3 made of aluminum and two pins 2A and 2A made of iron.
The iron pipe holder of the target size in this example is, for example, the following standard.
Iron tube stand of < target size: 3486-2121mm >, respectively
(outer tube)
Outer diameter: 60.5mm;
thickness: 2.3mm;
cross-sectional area: 420.2mm 2 。
(inner tube)
Outer diameter: 48.6mm;
thickness: 2.3mm;
cross-sectional area: 334.0mm 2 ；
"total weight": 14.2kg;
"bearer": 14.7kN (3.4 m extension).
In this example, the inner peripheral shape of the outer tube 2 is, for example, a regular octagonal shape in this example, and the outer peripheral shape is a regular octagonal shape similar to the inner peripheral shape, but ribs 2a protruding in the outer peripheral direction and extending in the axial direction are formed at the corners. An external thread 2b is formed at an end portion of the rib 2a in the axial direction (hereinafter, referred to as an upper portion of the outer tube 2) in which the inner tube 3 is fitted, and the external thread 2b is formed in a concave shape (with respect to the rib 2 a) in a spiral shape on the entire circumferential surface of the outer tube 2.
Further, two ribs 2A (male screw 2 b) of the outer tube 2 at different positions at the upper end are provided with pins 2A, 2A for fixing positions via a chain. The pins 2A and 2A are made of iron, and the respective thicknesses t are set to 4.5mm, for example.
Further, the outer tube 2 has pin insertion holes 2c, 2c formed therein so as to pass through the outer circumference of one side and the outer circumference of the other side from the positions of both ends in the width direction, which are the directions perpendicular to the axial direction in front view shown in fig. 5, of the upper end portion in the axial direction, toward the center by an amount corresponding to the thickness of the outer tube 2 and the inner tube 3, respectively. The pin insertion holes 2c are formed to be larger than the thickness t of the pin 2A by, for example, 0.4mm in this example, and open by, for example, 188mm from positions lowered by, for example, 50mm in the axial direction downward from the upper end.
For the outer tube 2 of the present example, the outer diameter in which the ribs 2a are formed is set to, for example, 100mm, the outer diameter in which the ribs 2a are not formed is set to, for example, 86.2mm, the length in the axial direction is set to, for example, 1620mm, and the inner circumferential shape is set to, for example, a regular octagonal shape in the present example.
The thickness of the outer tube 2 at the portion where the rib 2A is not present and the portions where the pins 2A and 2A do not pass through (the portions where the pin insertion holes 2c and 2c are not formed) is set to, for example, 2.0mm, and the cross-sectional area including the rib 2A is set to 880mm 2 . The cross-sectional area including the rib 2a corresponds to the cross-sectional area of the outer tube of the iron tube holder of the target size2.10 times.
An adjustment ring 2B is provided on the outer periphery of the outer tube 2, and the adjustment ring 2B is screwed with the external screw thread 2B to finely adjust the pin 2A inserted into the pin insertion hole 2c by moving the pin 2A in the axial direction, and to receive the pins 2A and 2A in the outer tube 2. The adjustment ring 2B is moved forward and backward in a spiral manner along the external thread 2B with the pin 2A being received from the upper portion, whereby the pin 2A is moved in the pin insertion hole 2c in the axial direction to finely adjust the entire length of the pipe holder 1.
On the other hand, the inner tube 3 is inserted into the outer tube 2, and has an outer diameter of 79.7mm, a thickness of a portion where the thickened portion 3A described later is not formed of 3.0mm, an axial length of 2200mm, and an outer circumferential shape of regular octagon, for example, so as to be insertable into the outer tube 2.
Further, the inner tube 3 is formed with thickened portions 3A on opposite sides of the inner circumference, the thickened portions 3A being continuous with the thickness of the inner tube 3 and increasing in thickness relative to the thickness of the inner tube 3. That is, in this example, the pin 2A inserted into the position adjustment hole 3B via the outer tube 2 is received by the thickened portion 3A.
The inner tube 3 is formed with position adjustment holes 3B, the position adjustment holes 3B, 3B are formed so as to pass through the outer periphery of the inner tube from one side to the other side on the peripheral surface in a state in which the thickened portions 3A, 3A are intermittently dug in the axial direction, and the sectional area including the thickened portion 3A is 1036mm 2 . The cross-sectional area including the thickened portion 3A corresponds to about 3.10 times the cross-sectional area of the inner tube of the iron tube holder of the target size.
Reference numeral 4 denotes a gasket for an outer tube fitted in an end face of the outer tube 2 opposite to the side where the rib 2a is formed in the axial direction. Reference numeral 5 denotes a gasket for inner tube which is externally fitted to an end surface of the inner tube 3 in the axial direction opposite to the insertion direction of the outer tube 2.
Next, the results of the bending test and weight confirmation of the tube holder 1 of the present invention having the above-described structure were recorded. The bending test is to use an outer tube placed on a flat ground in an extended state, insert the inner tube, stand the tube for a predetermined time while applying pressure vertically (axially downward) from the upper end of the inner tube, observe whether bending or not, and after the lapse of the predetermined time, apply pressure again (on the scale of 1 t), and perform the operation until bending occurs.
The total weight of the pipe holder 1 obtained in example 1 was slightly smaller than the total weight of the iron pipe holder of the target size, and the "high rigidity" was achieved, and the rigidity of the pipe holder 1 of example 2 was slightly higher than the rigidity of the iron pipe holder of the target size, and the "substantial weight reduction" was achieved. The ratio of the fluctuation of the iron pipe holder with respect to the target size is recorded in brackets.
Example 1 > 3492mm for extension-2421 mm for shortening:
cross-sectional area of outer tube: 880.0mm 2 (about 2.41 times);
cross-sectional area of inner tube: 1036.0mm 2 (about 3.25 times);
the total weight is as follows: 13.1kg (about 0.94 times);
load-bearing upon elongation: 35kN (approximately 2.38 times).
Example 2 > 3492mm for extension-2421 mm for shortening:
cross-sectional area of outer tube: 491.6mm 2 (about 1.35 times);
cross-sectional area of inner tube: 624.5mm 2 (about 1.96 times);
the total weight is as follows: 9.0kg (about 0.64 times);
load-bearing upon elongation: 15kN (approximately 1.02 times).
According to the test, the total weight of example 1 was about 6% lighter, and the rigidity of the bearing was increased to 200% or more, and the bearing of example 2 was about 2% higher, and the total weight was significantly reduced to 30% or more.
As described above, the present invention increases options for products in terms of importance of high rigidity or importance of weight reduction for iron pipe brackets of a target size, and when importance of high rigidity is attached, for example, the required number per unit area is reduced, so that the number of transportation and placement sites can be reduced, while when importance of weight reduction is attached, for example, the labor can be reduced when an operator transports the pipe brackets to the placement sites.
Description of the reference numerals
1. (aluminum) tube holder; 2. an outer tube; 2a, ribs; 2c, pin insertion holes; 2A, pins; 3. an inner tube; 3A, a thickening; 3B, position adjusting holes.

Claims (1)

1. An aluminum pipe holder for supporting a form for concrete casting, comprising: an aluminum outer tube; an aluminum inner tube inserted into the outer tube; and a pin inserted and pulled out through the peripheral surface of the outer tube and the peripheral surface of the inner tube, for fixing a position where the entire height adjustment is performed by the length of the inner tube relative to the insertion shaft of the outer tube,
the aluminum pipe holder includes two pins, wherein the outer peripheral shape of the inner pipe is any one of regular hexagon, regular octagon, and regular decagon, and the cross-sectional area of a portion not penetrated by the pins is 1.96 times or more of the cross-sectional area of the same portion of the inner pipe of the iron pipe holder of a target size, while the inner peripheral shape of the outer pipe is an inner shape capable of being inserted by the inner pipe, and the cross-sectional area of a portion not penetrated by the pins is 1.35 times or more of the cross-sectional area of the same portion of the outer pipe of the iron pipe holder of a target size, and the upper limit of the cross-sectional areas of the inner pipe and the outer pipe is set so that the total weight of the inner pipe and the outer pipe is smaller than the total weight of the inner pipe and the outer pipe of the iron pipe holder of a target size.
CN202280006516.XA 2021-07-28 2022-05-25 Aluminum pipe bracket Pending CN116249817A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2021-123411 2021-07-28
JP2021123411A JP7339685B2 (en) 2021-07-28 2021-07-28 aluminum pipe support
PCT/JP2022/021383 WO2023007931A1 (en) 2021-07-28 2022-05-25 Aluminum pipe support

Publications (1)

Publication Number Publication Date
CN116249817A true CN116249817A (en) 2023-06-09

Family

ID=85086542

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202280006516.XA Pending CN116249817A (en) 2021-07-28 2022-05-25 Aluminum pipe bracket

Country Status (7)

Country Link
US (1) US20230323684A1 (en)
EP (1) EP4219865A4 (en)
JP (1) JP7339685B2 (en)
CN (1) CN116249817A (en)
AU (1) AU2022320205B2 (en)
GB (1) GB2623605A (en)
WO (1) WO2023007931A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2537085Y2 (en) * 1992-07-13 1997-05-28 日本軽金属株式会社 Pipe support
JPH09158500A (en) 1995-12-07 1997-06-17 Furukawa Electric Co Ltd:The Single pipe supporting member made of aluminium alloy
JP2016176287A (en) 2015-03-20 2016-10-06 株式会社フォービル Aluminum pipe support
JP6467393B2 (en) 2016-11-02 2019-02-13 株式会社フォービル Aluminum pipe support

Also Published As

Publication number Publication date
AU2022320205A1 (en) 2023-05-25
US20230323684A1 (en) 2023-10-12
JP7339685B2 (en) 2023-09-06
JP2023018988A (en) 2023-02-09
EP4219865A1 (en) 2023-08-02
EP4219865A4 (en) 2024-08-14
AU2022320205B2 (en) 2024-06-27
GB202304654D0 (en) 2023-05-10
GB2623605A (en) 2024-04-24
WO2023007931A1 (en) 2023-02-02

Similar Documents

Publication Publication Date Title
CN116249817A (en) Aluminum pipe bracket
JP6467393B2 (en) Aluminum pipe support
KR102031748B1 (en) height adjustable handrail post
CN217551643U (en) Large-medium diameter pipeline aligning fixture
KR102268341B1 (en) Mold support stand for the src girder
CN214658956U (en) Prefabricated post hoist and mount are transferred positioner
CN216045822U (en) Adjustable fixing device of bending section pump line
JP6924650B2 (en) Reinforcing hardware for pipe support
CN214330819U (en) Pumping water tank and pumping equipment
CN218745898U (en) Adjustable welding positioning device for steel plate bolt embedded part
JP2537085Y2 (en) Pipe support
KR101806000B1 (en) Extender for extending length of support
CN215091762U (en) Metal pipe wall welding anti-deformation device
JPH04272365A (en) Pipe support
JP6826338B2 (en) Formwork support height adjustment device
CN218346788U (en) Adjustable socket joint type plate buckle type scaffold diagonal draw bar
CN216340956U (en) Adjustable base of movable mould frame
CN220790594U (en) Constructional column template reinforcing apparatus
CN216194701U (en) Concrete square pile end plate and prestressed concrete square pile comprising same
CN218612375U (en) PCCP steel cylinder cutting setting device
CN216370840U (en) Auxiliary device for welding of discharging funnel
CN220162778U (en) Self-compaction concrete adjustable blanking pipe of subway precast slab
CN217480809U (en) House supporting beam steel construction connection structure
CN113235919B (en) Adjustable through-floor sleeve fixing frame and installation method of through-floor sleeve
CN219688047U (en) Steel pipe mouth protection device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination