JP2010149172A - Multi-spot welding machine for manufacturing bar arrangement unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-spot welding machine for manufacturing a bar arrangement unit which is usable even when how narrow the spacing between main reinforcements is, and efficiently manufactures the bar arrangement unit including a part with the spacing between main reinforcements being very narrow without any man-power. <P>SOLUTION: The multi-spot welding machine includes: a welding machine body 1 in which a large number of welding guns 4 are arranged side by side on a supporting stand 3 movably in the direction crossing the conveying direction of main reinforcements 31, and a conveying guide 9 for guiding the conveyance of the main reinforcements 31 is arranged on the supporting stand 3 for each welding gun 9 so that a part of the guide 9 faces the welding gun 4; and auxiliary welding equipment 11 provided as an accessory of the welding machine body 1. The auxiliary welding machine 11 includes one or a plurality of auxiliary welding guns 12 which are vertically movable and turnable or advanceable/retractable, and an auxiliary conveying guide 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a multi-spot welding apparatus for manufacturing a reinforcing bar unit, and more specifically, a multi-spot for manufacturing a reinforcing bar unit that is manufactured by welding and assembling reinforcing bars in a lattice shape and used for the reinforcement of a foundation of a house. The present invention relates to a welding apparatus.

  For example, a bar arrangement unit in which reinforcing bars are assembled in a lattice pattern is used for the reinforcement of a solid foundation or a fabric foundation of a house. This reinforcing bar unit was once manufactured by welding at a construction site, but recently, the shape is designed in advance at the time of designing a house and is assembled by welding in advance in a welding factory. In general, the assembling is performed by welding transverse bars (shear bars) having a diameter smaller than that of the main bars at a predetermined pitch to a plurality of main bars conveyed at predetermined intervals. The bar arrangement unit assembled by welding in this way is used as it is or after being appropriately bent and deformed.

  Assembling by welding of the bar arrangement unit (welding of the horizontal bar to the main bar) is usually performed using a multi-spot welding device, but the bar arrangement unit does not necessarily have a uniform thickness of reinforcing bars in a grid pattern at regular intervals. Reinforcing bars are closely designed in places where strength is required, not necessarily assembled. In that case, the rebar spacing is often designed to be very narrow.

  In such a case, for example, when the interval between main bars having a diameter of 13 to 19 φ is typically designed to be 30 mm to 50 mm (see d in FIG. 2), the conventional multi-spot welding apparatus cannot cope. In other words, the multi-spot welding apparatus is one in which a large number of welding guns are arranged side by side in a movable state, but the width of each welding gun or its accessory itself is a narrow interval of 30 mm to 50 mm between the main bars. In such a case, the distance between the welding guns cannot correspond to the distance between the main bars.

  For this reason, conventionally, the welding work of one of the adjacent main bars has to be performed manually in a process different from the welding process by the multi-spot welding apparatus, which requires considerable labor and time. I needed.

  In the above case, it is conceivable to apply the electrodes so as to straddle two adjacent main bars, but in such a case, the thickness of the two main bars is not always uniform. In addition, leakage of welding current is affected by the depletion state of the electrode surface and the welding conditions at the two main bars are different, so that poor welding is likely to occur, which is not a practical method. For this reason, this method has not been adopted in practice.

JP 2006-181620 A JP-A-7-227676 JP-A-8-1342

  As described above, in the case of the conventional multi-spot welding apparatus, since it becomes impossible to cope with the distance between the main bars being narrowed to a certain extent, there is a disadvantage that the part must be manually performed in a separate process. Therefore, the present invention is capable of dealing with a narrowly arranged space unit that includes a portion where the distance between the main muscles is very narrow and includes a portion where the distance between the main muscles is very narrow. An object is to provide a multi-spot welding apparatus for manufacturing.

  The invention according to claim 1 for solving the above-described problem has a support stand, and a plurality of welding guns are arranged in parallel on the support stand so as to be movable in a direction crossing the conveying direction of the main reinforcing bar. And a welding apparatus main body provided on the support stand, the conveyance guide for guiding the conveyance of the main bars being arranged with respect to each welding gun such that a part thereof faces the welding gun, and the welding apparatus main body. The auxiliary welding device comprises one or a plurality of auxiliary welding guns that can move up and down and turn or advance and retract, and an auxiliary conveyance guide installed on the support stand or the conveyance guide. A multi-spot welding apparatus for manufacturing reinforcing bar units.

  Preferably, the auxiliary welding gun of the auxiliary welding apparatus is movable in a direction intersecting with the main bar conveyance direction and parallel to the main bar conveyance direction. Typically, the auxiliary welding device is arranged on the downstream side of the welding device main body.

  Preferably, the transport guide and the auxiliary transport guide include a leaf spring that holds down the main bar that travels inside the transport guide, and the auxiliary transport guide intersects the transport direction of the main bar with respect to the support stand or the transport guide. The auxiliary conveyance guide is detachably attached to the support stand or the conveyance guide.

  The present invention is as described above, and the multi-spot welding apparatus for manufacturing a reinforcing bar unit according to the present invention includes an auxiliary welding apparatus in addition to the welding apparatus main body, and the auxiliary welding apparatus is capable of turning and moving up and down. A welding gun is provided, which operates to weld another main bar close to one main bar to the horizontal bar in response to the operation of the welding unit main body, usually downstream of the welding unit main body. Since the welding position by the auxiliary welding gun can be changed and adjusted, it can be used regardless of how narrow the distance between the main bars is, and the distance between the main bars that could not be manufactured on a single line in the past. There is an effect that it is possible to efficiently manufacture a bar arrangement unit including a narrow portion without requiring manual labor.

  In particular, in the inventions described in claims 2, 3 and 6, there is an effect that can immediately cope with the manufacture of various bar arrangement units having different main muscle intervals. In the invention described in claim 5, There is an effect that good welding can be performed.

  The best mode for carrying out the present invention will be described below with reference to the drawings. The multi-spot welding apparatus for bar arrangement manufacturing according to the present invention comprises a welding apparatus main body 1 and an auxiliary welding apparatus 11 attached thereto. The auxiliary welding device 11 is usually arranged on the downstream side of the welding device main body 1.

  The welding apparatus main body 1 has a base 2 and a support stand 3 erected on the base 2. The support stand 3 supports a large number of welding guns 4 arranged in a direction crossing the conveying direction of the main bars 31. Is done. Each welding gun 4 is supported by the support stand 3 so that it can be moved to any position in the direction intersecting with the conveyance direction of the main bar 31, and the interval between the main bars 31 is uniform or non-uniform in use. The movement is adjusted to match. Since the movable support method of the welding gun 4 by the support stand 3 is not different from the conventional case, the detailed description is omitted.

  The welding gun 4 has an intersection between a main bar 31 conveyed and a horizontal bar 32 supplied in a direction orthogonal to the main bar 31 between the movable electrode 5 and the fixed electrode 6 driven up and down by the air cylinder 7. Spot welding. A transformer 8 is provided for each welding gun 4.

  A conveyance guide 9 that guides the conveyance of the main reinforcement 31 fed to the welding gun 4 through the support stand 3 and performs positioning for welding with the transverse reinforcement 32 is installed in the corresponding part of the welding gun 4 of the support stand 3. The conveyance guide 9 is projected to the upstream side and the downstream side of the support stand 3, and is installed so that the upstream side faces the welding gun 4. The conveyance guide 9 is a pipe-like one having a through-hole through which the main bar 31 is inserted, or a bowl-like one having a groove. In the illustrated example, the portion protruding to the upstream side of the support stand 3 is formed in a pipe shape, and the portion protruding to the downstream side and facing the welding gun 4 is formed in a hook shape.

  Preferably, a leaf spring (not shown) is provided in the conveyance guide 9 (the same applies to the auxiliary conveyance guide 13 described later). This leaf spring is always in contact with the main muscle 31 and acts to ensure that the main muscle 31 is in contact with the fixed electrode 6. Thereby, the main reinforcement 31 and the horizontal reinforcement 32 are prevented from being incompletely welded.

  In the present invention, an auxiliary welding device 11 is attached to the welding device main body 1. The auxiliary welding device 11 is usually arranged on the downstream side of the welding device main body 1 so as to be separated by a pitch corresponding to the horizontal bars 32. The auxiliary welding device 11 includes one or a plurality of auxiliary welding guns 12 that are movable in the direction intersecting the conveyance direction of the main bar 31, and an auxiliary conveyance guide 13 that is attached to the conveyance guide 9. Usually, there is one auxiliary welding gun 12, but there may be a plurality. Reference numeral 22 denotes a transformer for the auxiliary welding gun 12.

  The auxiliary welding gun 12 is supported so as to be movable up and down, and is supported so as to be able to turn or advance and retract. Preferably, the auxiliary welding gun 12 is movable in a direction crossing the conveyance direction of the main bar 31, and further parallel to the conveyance direction of the main bar 31. Is supported so as to be movable. In order to enable such operation of the auxiliary welding gun 12, various X, Y and Z axis robot mechanisms can be employed.

  As an example, FIG. 1 shows a cross slide mechanism constituted by an LM guide mechanism for moving a movable base 14 provided with an auxiliary welding gun 12 in the X and Y (vertical and horizontal) axial directions. That is, the cross slide mechanism includes a fixed base 15 on which an LM guide 16 is laid and extending in parallel with the width direction of the welding apparatus body 1, a lateral movement base 17 movable along the LM guide 16, and a lateral movement base. The LM guide 16 is arranged on the LM guide 16 and the longitudinal movement base 19 is installed on the LM guide orthogonal to the LM guide 16. The movable base 14 can be moved vertically and horizontally by being installed on the vertically moving base 19.

  On the movable base 14, an elevating cylinder 20 for moving the auxiliary welding gun 12 in the Z (vertical) axis direction is installed, and a swinging motor 21 for turning the auxiliary welding gun 12 is installed. The auxiliary welding gun 12 may have an advance / retreat function in addition to or instead of the turning function. This advance / retreat function is, for example, by arranging an LM guide obliquely intersecting the conveying direction of the main bar 31 on the longitudinal movement base 19 and moving the upper part from the movable base 14 along the LM guide by motor drive or cylinder drive. This can be realized by making it movable.

  The auxiliary conveyance guide 13 is attached to the support stand 3 or the conveyance guide 9 so as to be movable in a direction crossing the conveyance direction of the main bars 31. That is, the auxiliary conveyance guide 13 has an interval between the adjacent conveyance guides 9 (more precisely, an interval between the conveyance paths of the main bars 31) corresponding to a design distance d between the two adjacent main bars 31. To be movable.

  The auxiliary conveyance guide 13 is, for example, a screw that is screwed to the conveyance guide 9 so that the distance from the conveyance guide 9 can be adjusted by screwing and unscrewing of the screw, or a rail that extends the auxiliary conveyance guide 13 from the conveyance guide 9 Or move along. Further, the auxiliary transport guide 13 may be attached to the support stand 3 or the transport guide 9 so as to be detachable or turnable.

  In using the multi-spot welding apparatus according to the present invention having the above configuration, first, as in the conventional apparatus, the interval between the conveyance guides 9 is adjusted in accordance with the design drawing. At the same time, the distance between the auxiliary conveyance guide 13 and the conveyance guide 9 adjacent thereto is adjusted, and the movable base 14 is moved along the LM guide 16 to position the auxiliary welding gun 12. Then, the main bars 31 are supplied to the respective conveyance guides 9 manually or by mechanical operation, and the main bars 31a are also supplied to the auxiliary conveyance guides 13 to perform positioning for welding the horizontal bars 32. The supply of the main bar 31a to the auxiliary conveyance guide 13 may be performed after the first horizontal bar 32 is welded.

  After positioning the main bar 31, the horizontal bar 32 is supplied and positioned at the welding position, and the main bar 31 and the horizontal bar 32 are spot-welded by the welding apparatus main body 1 in the same manner as in the prior art. Then, after all the spot weldings are completed, the main reinforcing bars connected by the horizontal bars 32 are advanced by a predetermined pitch. Thereafter, the welding apparatus main body 1 repeats this operation.

  On the other hand, the auxiliary welding gun 12 of the auxiliary welding device 11 is positioned lower than the main muscle row when the main muscle row to which at least one transverse bar 32 is welded advances, and when it rises, the main muscle 31 and It stands by at the turning position (retracted position) where it does not contact the horizontal muscle 32. Then, the auxiliary welding gun 12 rises to a height position where the welding operation is performed when the main reinforcement row reaches the welding position by the auxiliary welding gun 12, and then the intersection of the main reinforcement 31a and the horizontal reinforcement 32, in other words, welding. It turns (advances) so that the part is located between the electrodes, and performs the welding operation.

  When the welding operation is completed in this way, the auxiliary welding gun 12 immediately turns in the reverse direction (retreats), descends, returns to the original standby position, waits for the main muscle row to advance one more pitch, and thereafter Repeat the action. Thus, it is possible to perform a welding operation on the transverse bar 32 of the main bar 31a adjacent to the main bar 31 that could not be performed in one process in a series of processes.

  Although the present invention has been described in some detail with respect to its most preferred embodiments, it will be apparent that a wide variety of different embodiments can be constructed without departing from the spirit and scope of the invention, the invention being defined by the appended claims. It is not restricted to the specific embodiment other than limiting in.

It is a schematic front view which shows the structural example of the multi-spot welding apparatus for bar arrangement unit manufacture which concerns on this invention. It is a schematic plan view which shows the structural example of the multispot welding apparatus for bar arrangement unit manufacture which concerns on this invention. It is an AA arrow line view in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Welding device main body 2 Base 3 Support stand 4 Welding gun 5 Movable electrode 6 Fixed electrode 7 Air cylinder 8 Transformer 9 Transport guide 11 Auxiliary welding device 12 Auxiliary welding gun 13 Auxiliary transport guide 14 Movable base 15 Fixed base 16 LM guide 17 Lateral movement Base 19 Vertical movement base 20 Elevating cylinder 21 Oscillating motor 22 Transformer 31 Main muscle 31a Main muscle 32 Horizontal muscle

Claims (7)

  A support stand is provided, and a plurality of welding guns are arranged side by side in the support stand so as to be movable in a direction intersecting with the transport direction of the main reinforcement to be welded, and transport for guiding the transport of the main reinforcement to the support stand. The guide comprises a welding apparatus main body disposed with respect to each welding gun such that a part of the guide faces the welding gun, and an auxiliary welding apparatus attached to the welding apparatus main body. A multi-spot welding apparatus for manufacturing a reinforcing bar unit, comprising one or a plurality of auxiliary welding guns that are capable of turning and reciprocating and an auxiliary conveyance guide installed on the support stand or the conveyance guide.   The multi-spot welding apparatus for bar arrangement manufacturing according to claim 1, wherein the auxiliary welding gun of the auxiliary welding apparatus is supported so as to be movable in a direction intersecting with a conveyance direction of the main reinforcement.   The multi-spot welding apparatus for manufacturing a reinforcing bar unit according to claim 1 or 2, wherein the auxiliary welding gun of the auxiliary welding apparatus is supported so as to be movable in parallel with the conveying direction of the main reinforcing bar.   The multi-spot welding apparatus for bar arrangement manufacturing according to any one of claims 1 to 3, wherein the auxiliary welding apparatus is disposed on the downstream side of the welding apparatus main body.   The multi-spot welding apparatus for bar arrangement manufacturing according to any one of claims 1 to 4, wherein each of the conveyance guide and the auxiliary conveyance guide includes a leaf spring that holds down a main reinforcement that travels inside the conveyance guide and the auxiliary conveyance guide.   The multi-bar arrangement unit manufacturing multi-unit according to any one of claims 1 to 5, wherein the auxiliary conveyance guide is attached to the support stand or the conveyance guide so as to be movable in a direction crossing the conveyance direction of the main reinforcement. Spot welding equipment.   The multi-spot welding apparatus for bar arrangement manufacturing according to any one of claims 1 to 6, wherein the auxiliary conveyance guide is detachably attached to the support stand or the conveyance guide.

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