JP2005066612A - Automatic gas pressure-welding device for hoop reinforcing bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic pressure-welding device for hoop reinforcing bars for automating a series of operations by pressurizing and heating in joining hoop reinforcing bars. <P>SOLUTION: In the automatic pressure-welding device 1, hoop reinforcing bar supporters 3 and a gas burner 4 are set on a base 2, and operations such as fixing and pressure-welding for hoop reinforcing bars 30 with the hoop reinforcing bar supporters 3 and heating by the gas burner 4 can automatically be performed with each timer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an automatic gas pressure welding apparatus for hoop rebar. More specifically, the present invention relates to an automatic gas pressure welding apparatus for hoop reinforcing bars capable of automatically pressure-welding the joint surface of the hoop reinforcing bars by gas pressure welding.

  Conventionally, gas pressure welding of reinforcing bars has been widely adopted in the field because it is suitable mainly for connecting large diameter reinforcing bars. As an apparatus that automates this gas pressure welding, as shown in FIG. 10, a flow sensor 101 of acetylene gas, a display panel 102 for notifying that the flow rate is within an appropriate range, a torch 104 having a start button 103, The hydraulic cylinder 105, the hydraulic pump 106, the hydraulic sensor 107 that measures the pressure of the hydraulic cylinder, and the flow rate sensor obtains that the flow signal of acetylene gas is within the set range, and instructs the heating of the reinforcing bar by the display panel 102, and the start signal The control unit 108 and the acetylene gas that automatically pressurizes the reinforcing bar to the upper limit set pressure, automatically obtains a signal that the applied pressure is reduced to the lower limit set pressure by softening the heating unit, and pressurizes the upper limit set pressure again. A configuration including a recording unit 109 that records changes in flow rate and pressure (for example, see Patent Document 1).

JP 2002-96179 (abstract, Fig. 1)

  That is, in the gas pressure welding apparatus, a heating flame is formed at a flow rate within a set range of acetylene gas and then the work is performed, so that a number of workers having different skills and physical conditions are mixed to perform pressure welding work. However, it is always possible to obtain a good and uniform pressure contact strength.

  However, in the gas pressure welding device, it is possible to achieve a further effect by performing highly reliable joining without variation when joining relatively large-diameter rebars that are main bars at construction sites or joining several types of rebars with different diameters. However, all of the attachment to the rebar pressure welder and the heating of the rebar joint with a gas burner are performed manually.

  On the other hand, hoop bars are often placed on viaducts and pillars of buildings as a measure against seismic isolation, and these hoop bars are folded by reinforcing bars in a square shape and overlapping the ends with gas pressure welding or binder wires. However, since the number of works in one construction is very large, there is a problem that the on-site pressure welding work becomes very complicated even with the gas pressure welding apparatus. Further, since the hoop bars are formed by bending the reinforcing bars in a quadrangular shape, there is a problem that it takes time and effort to mount the hoop bars on the pressure welder.

  The present invention has been made in view of the above points, and an object thereof is to provide an automatic gas pressure welding apparatus for a hoop rebar that automates a series of operations by pressurization and heating at the time of joining hoop bars. Is.

  To achieve the above objectives. In the automatic gas pressure welding apparatus for hoop reinforcing bars according to the present invention, the end parts of the hoop bars are arranged to face each other, and the end faces are joined together by heating while pressing the periphery of the facing parts with acetylene gas. In the automatic gas pressure welding apparatus for the hoop reinforcing bars, the clamping means for gripping the hoop bars in a state where the ends of the hoop bars are opposed to each other, and pressurizing the reinforcing bars in a state where the ends of the hoop bars are clamped. A pressurizing means and a gas burner heating means for heat-treating the periphery of the facing portion of the iron with a gas burner are provided, and the clamp means, the pressurizing means and the gas burner heating means are controlled by timers.

  Here, in order to continuously perform the gas pressure welding operation of the same diameter hoop muscle, a timer is set based on the heating amount and heating time required for the gas pressure welding of the hoop muscle or the set value of pressurization and pressurization time. Based on the set time by the timer, a series of operations of clamping and pressurizing and heating the ends of the hoop muscles is automated.

  In the automatic gas pressure welding apparatus for the hoop rebar of the present invention, by installing the hoop rebar in the gas pressure welding apparatus, clamping and pressurization between the ends of the hoop reinforcement and heating work by the gas burner can be automatically performed. A single worker can perform highly reliable joining without variation.

  In addition, since it is not necessary to join the hoop reinforcement at the construction site, the hoop reinforcement joining work is performed by the automatic gas pressure welding apparatus for the hoop reinforcement of the present invention before bringing it into the construction site, thereby improving the work efficiency. It becomes possible to plan.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings to provide an understanding of the present invention.

  FIG. 1 is a front explanatory view for explaining an example of an automatic gas pressure welding apparatus for a hoop reinforcing bar to which the present invention is applied, and FIG. 2 is a main portion explanatory view in FIG. In the automatic gas pressure welding apparatus 1 shown here, a hoop rebar support device 3 and a gas burner 4 are installed on a base 2, and a hoop rebar support portion 5 is provided behind these hoop rebar support device 3 and the gas burner 4. Is erected.

Therefore, the hoop rebar support device 3 includes a pair of clamp portions 6 that hold the end surfaces of the hoop rebar 30 facing each other and a pressurizing portion 7 that pressurizes the end surfaces of the hoop rebar 30. Each pressurizing unit 7 is provided with a hydraulic cylinder 8. An electric hydraulic pump 9 is connected to the hydraulic cylinders 8, 8 of the pair of clamp parts 6, and the clamp part 6 is freely operated by a foot switch 10.
Further, a separate electric hydraulic pump 9 is provided in the hydraulic cylinder 8 provided in the pressurizing unit 7.

  Next, the gas burner 4 is located at the center between the pair of clamp parts 6 and is installed on a gas burner support part 11 that can slide in the front-rear direction. The gas burner support portion 11 is provided with an air cylinder 12 and can slide in the front-rear direction by opening and closing an electromagnetic valve 14 provided between the gas cylinder support portion 11 and the oxygen cylinder 13.

  Further, the gas burner 4 is provided with an oxygen solenoid valve 15 and an acetylene gas solenoid valve 16, and the oxygen solenoid valve 15 and the acetylene gas solenoid valve 16 are respectively connected to an oxygen cylinder 13 and an acetylene via a pressure regulator 17. The gas cylinder 18 is connected.

  The gas burner 4 is composed of a main pipe 19 and a branch pipe 20, and the branch pipe 20 is formed in an arc shape on the tip side, and an ejection hole 21 is projected from the inside toward the center. It is to be configured. Therefore, by setting the gas burner 4 so that the end surfaces of the hoop rebar A are at the center of the branch pipe 20, the vicinity of the end surface of the hoop rebar 30 is uniformly heated by the flame injected from the ejection hole 21. Is possible.

  In the hoop rebar automatic gas pressure welding apparatus of the present invention constructed as described above, the rear portion of the hoop rebar 30 with the joining terminal 31 side of the hoop rebar 30 sandwiched between the clamps 6 of the hoop rebar support 3 as shown in FIG. The side is supported by the hoop rebar support 5.

  Here, the electric hydraulic pump 9 is operated by the foot switch 10, and the hydraulic cylinder 8 is extended by the electric hydraulic pump 9 and fixed at the position where the surfaces of the joining terminals 31 of the hoop rebar 30 face each other.

  Therefore, as shown in FIG. 3, when the first switch is turned on by the start button, the timer G is activated, the electromagnetic valve 14 is opened, the air cylinder is pushed by the oxygen pressure to advance the gas burner 4, and the end face of the hoop rebar 30 It is set so that the mutual part becomes the center of the branch pipe 20.

  In this case, the solenoid valve 14 is closed and the gas burner 4 is set to retreat with the lapse of the time determined by the timer G. By turning on the second time, as shown in FIG. B is activated, the oxygen solenoid valve 15 and the acetylene gas solenoid valve 16 are opened with a time difference of 0.2 to 0.3 seconds, oxygen and acetylene gas flow from the oxygen cylinder 13 and the acetylene gas cylinder 18 to the gas burner 4, Ignite with a fire.

  Next, as shown in FIG. 6, the timer H is activated simultaneously with the ignition of the gas burner, and the electric hydraulic pump 9 is activated. The primary pressurization between the end surfaces of the hoop rebar 30 is performed for a time set in the timer H by the hydraulic cylinder 8 connected to the electric hydraulic pump 9.

  Further, as shown in FIG. 7, the timer C is simultaneously operated simultaneously with the operation of the timer H, and the timer D is operated according to the time set in the timer C. The electric hydraulic pump 9 is operated again by the operation of the timer D, and the secondary pressurization between the end surfaces of the hoop rebar 30 by the hydraulic cylinder 8 is performed for the time set in the timer D by the operation of the electric hydraulic pump 9.

  Further, as shown in FIG. 8, the timer E is also activated simultaneously with the start of the second time, the timer F is activated according to the time set in the timer E, the hydraulic pressure of the hydraulic cylinder 8 is released by the electric hydraulic pump 9, Returning to the initial position, the press contact between the end faces of the hoop rebar 30 is completed.

  Next, as shown in FIG. 9, the timer I is also activated simultaneously with the start of the second time, and the timer J is activated by the time set in the timer I, and the hydraulic pressure coupled to the clamp 6 of the hoop reinforcing bar support 3. By releasing the hydraulic pressure of the cylinder 8 by the operation of the electric hydraulic pump 9, the fixing is released by the clamp 6.

  By pressing the start button for the second time as described above, timers A, B, H, C, E, and I are simultaneously operated. Of these, timers D, F, and J are determined by the time difference between timers C, E, and I. By operating for a long time, it becomes possible to perform a series of press contact operations by heating and pressurizing the end faces of the hoop rebar 31.

  In the present invention, by setting the hoop rebar to the rebar support, the time determined by each timer is performed in order by holding the hoop rebar by the clamp, heating the end surfaces of the hoop rebar by the gas burner, and pressurizing by the hydraulic cylinder. Therefore, the pressure welding of many hoop rebars can be efficiently performed by one operator.

It is front explanatory drawing for demonstrating an example of the automatic gas pressure welding apparatus of the hoop reinforcement to which this invention is applied. It is principal part explanatory drawing of the hoop rebar supporter in FIG. It is explanatory drawing which shows an example of the installation state of the gas burner of the automatic gas pressure welding apparatus of the hoop reinforcement to which this invention is applied. It is explanatory drawing which shows the attachment state of the hoop reinforcement to the hoop reinforcement support of the automatic gas pressure welding apparatus of the hoop reinforcement to which this invention is applied. It is explanatory drawing which shows the action state at the time of ignition of the gas burner of the automatic gas pressure welding apparatus of the hoop reinforcement to which this invention is applied. It is explanatory drawing which shows the primary pressurization of the hoop reinforcement by the hoop reinforcement supporter in FIG. It is explanatory drawing which shows the secondary pressurization of the hoop reinforcement by the hoop reinforcement supporter in FIG. It is explanatory drawing which shows the completion | finish of press-contact of the hoop rebar by the hoop rebar supporter in FIG. It is explanatory drawing which shows cancellation | release of the hoop reinforcement by the hoop reinforcement supporter in FIG. It is explanatory drawing which shows an example of the conventional automatic pressure welding apparatus of a reinforcing bar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automatic gas pressure apparatus 2 Base 3 Hoop rebar support 4 Gas burner 5 Hoop rebar support part 6 Clamp part 7 Pressurization part 8 Hydraulic cylinder 9 Electric hydraulic pump 10 Foot switch 11 Gas burner support part 12 Air cylinder 13 Oxygen cylinder 14 Solenoid valve 15 Solenoid valve for oxygen 16 Solenoid valve for acetylene gas 17 Pressure regulator 18 Acetylene gas cylinder 19 Main pipe 20 Branch pipe 21 Injection hole 30 Hoop rebar

Claims (1)

In the automatic gas pressure welding apparatus of the hoop reinforcement, the end portions of the hoop bars are arranged to face each other, and the end faces of the end faces are connected to each other by press-contacting them while being heated with acetylene gas.
Clamping means for gripping in a state where the ends of the hoop muscles are opposed to each other;
A pressurizing means for pressurizing the reinforcing bars in a state where the ends of the loop bars are clamped;
A gas burner heating means for heat-treating the periphery of the facing portion of the iron with a gas burner,
An automatic gas pressure welding apparatus for a hoop reinforcing bar, wherein the clamp means, the pressurizing means and the gas burner heating means are respectively controlled by a timer.

Images