JPH0683183U - Rebar welding tool - Google Patents

Abstract

(57) [Abstract] [Purpose] A semi-cylindrical receiving part and a supporting part that supports the reinforcing bar are integrally provided on the column, so that no complicated attaching operation is required and the reinforcing bar is welded. Can be visually confirmed without fail, and it is not necessary for the operator to hold the receiving portion by hand, and the welding workability is greatly improved. [Structure] A semi-cylindrical receiving portion 9 located in a portion corresponding to a groove gap L between two reinforcing bars 6 and 7 with a welded metal intervening space, a column 3 supporting the receiving portion 9, and the column 3 is provided on at least one of the columns 3, and a supporting portion 5 for supporting the support column 3 on the reinforcing bar 6 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reinforcing bar welding tool such as used when welding and connecting reinforcing bars.

[0002]

[Prior art]

 Conventionally, as a welded joint for connecting reinforcing bars by welding, for example, there is a joint having a structure as shown in FIG. That is, two rebars 101, 102 are opposed to each other with a groove gap 103 (a gap provided between two members to be joined), and a welded metal intervening space is present in the corresponding portion of the groove gap 103. A metal cylindrical joint 104 positioned is attached, the opening of the joint 104 is welded from 105, a predetermined portion is filled with a weld metal 106, and two reinforcing bars 101 and 102 are welded and connected. Is.

However, in this cylindrical joint 104, it is necessary to adhere the joint 104 to the reinforcing bars 101 and 102 at each welding location, and the attaching operation is, of course, complicated and is cylindrical. Therefore, there was a problem that it was impossible to visually confirm the welding state of the reinforcing bar clearly. In addition, the conventional joint 104 described above is welded to the rebars 101 and 102 as it is in the case of iron, and is crushed by a hammer or the like after completion of welding in the case of ceramic, but in any case, it is a disposable structure. However, there was a problem that it was wasteful and costly.

On the other hand, in order to make the two rebars 101, 102 face each other with a groove gap 103 therebetween, a reinforcing bar welding is provided at both ends of the supporting column, which support portions support the supporting column to the reinforcing bars 101, 102. There is a tool (not shown). However, since the conventional rebar welding tool and the joint 104 are separate members separated from each other, the joint 104 is temporarily held by the worker while holding the joint 104 in the portion corresponding to the groove interval 103. After that, it was necessary to perform main welding, and there was a problem that welding workability was extremely poor.

[0005]

[Problems to be solved by the device]

 According to the first aspect of the present invention, the semi-cylindrical receiving portion and the supporting portion for supporting the reinforcing bar are integrally provided on the column, so that a complicated attaching operation is unnecessary and the reinforcing bar It is an object of the present invention to provide a reinforcing bar welding tool capable of significantly improving welding workability because the welding state can be surely visually checked and the operator need not hold the receiving part by hand.

According to the second aspect of the present invention, in addition to the object of the first aspect of the invention, the supporting portions are provided at both ends of the supporting column, so that the supporting structure of the receiving portion is stabilized by the both-end supporting structure. It is an object of the present invention to provide a reinforcing bar welding tool capable of easily forming a groove gap between two reinforcing bars.

The invention according to claim 3 of the present invention has the object of the invention according to claim 2 described above, and by constructing the strut from two slidable members, two rebars are provided when the strut slides. An object of the present invention is to provide a reinforcing bar welding tool capable of forming a groove gap therebetween more easily.

In the invention according to claim 4 of the invention, in addition to the object of the invention according to claim 1, at least the surface of the semi-cylindrical receiving portion facing the weld metal interposing space is made of copper, ceramics, An object of the present invention is to provide a reinforcing bar welding tool that can be repeatedly used in the receiving portion by forming a fluororesin coating layer or other difficult welding material, reduce waste, and greatly reduce welding costs.

In the invention according to claim 5 of the invention, in addition to the object of the invention according to claim 1, by configuring the receiving portion to be attachable to and detachable from the support, when the receiving portion is deteriorated by welding, An object of the present invention is to provide a reinforcing bar welding tool capable of exchanging the receiving portion.

[0010]

[Means for Solving the Problems]

 The invention according to claim 1 of this invention is a semi-cylindrical receiving portion located in the groove spacing corresponding portion of the two reinforcing bars with a welded metal interposition space, and a column for supporting the receiving portion. A reinforcing bar welding tool provided on at least one of the above-mentioned supporting columns and having a support portion for supporting the supporting columns on the reinforcing bars.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the receiving portion is provided at a substantially middle portion of the support column, and the support portions are provided at both ends of the support column. It is a reinforcing bar welding tool in which is provided.

According to a third aspect of the present invention, in addition to the configuration of the second aspect of the invention, the column is composed of two slidable members, and the column is composed of two members when the column is slid. It is a reinforcing bar welding tool that forms a groove interval.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, at least the surface of the receiving portion facing the weld metal intervening space is made of a difficult welding material (copper, ceramic, It is a reinforcing bar welding tool formed of a fluororesin coating layer, etc.).

The invention according to claim 5 of this invention is a reinforcing bar welding tool in which the receiving portion is configured to be attachable to and detachable from the column, in addition to the configuration of the invention according to claim 1. And

[0015]

[Effect of device]

 According to the first aspect of the present invention, since the receiving portion and the supporting portion are integrally provided with respect to the supporting column, when the supporting portion is supported by the reinforcing bar, the receiving portion is supported through the supporting column. The part is located at the groove interval corresponding part of the two reinforcing bars. Therefore, it is not necessary for an operator to hold the receiving portion by hand, and it is not necessary to perform temporary fixing welding, so that there is an effect that the welding workability can be greatly improved. In addition, since the above-mentioned receiving portion is configured in a semi-cylindrical shape, there is an effect that a complicated attaching operation is unnecessary and the welding state of the reinforcing bar can be surely visually confirmed.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, since the supporting portions are provided at both ends of the supporting column, the supporting portion is supported by the both-end supporting structure. The support is stable, and by moving one of the two reinforcing bars, it is possible to easily form a groove interval between the two reinforcing bars.

According to the invention of claim 3 of the present invention, in addition to the effect of the invention of claim 2, since the pillar is composed of two slidable members, the supporting portions at both ends of the pillar are supported. After supporting each of them on the respective reinforcing bars, sliding the columns composed of two members has the effect that the groove interval can be more easily formed between the two reinforcing bars.

According to the invention of claim 4 of the present invention, in addition to the effect of the invention of claim 1, at least the surface of the receiving portion facing the weld metal intervening space is made of a difficult welding material (copper, Since it is formed of ceramics, fluororesin coating layer, etc.), the welding of the surface and the welding metal is avoided, and as a result, the above-mentioned receiving portion can be repeatedly used, and the conventional waste can be omitted. In addition to the above, there is an effect that the welding cost can be significantly reduced.

According to the invention of claim 5 of the present invention, in addition to the effect of the invention of claim 1, since the receiving portion is configured to be attachable to and detachable from the column, the receiving portion by welding is There is an effect that the receiving portion can be replaced when it deteriorates.

[0020]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings. The drawings show a reinforcing bar welding tool, and in FIGS. 1 to 4, a support column 3 composed of two members of an outer pipe 1 and an inner rod 2 is provided, and both ends of the support column 3, that is, one end of the outer pipe 1 and the inner rod 2 are provided. Supporting parts 5 and 5 are attached to the other end of the via brackets 4 and 4, respectively.

As shown in FIGS. 2 and 3, the above-mentioned supporting portions 5 and 5 integrally connect the V-shaped receiving piece 5b to one side of the base piece 5a and the tightening member mounting piece 5c to the other side, respectively, and are viewed in plan view. It is formed in a substantially U-shape, and the tightening member attachment piece 5c is provided with a butterfly bolt 8 for pressing and fixing the rebars 6 and 7 (specifically, steel bars for concrete reinforcement) on the inner surface of the V-shaped receiving piece 5b. Are screwed.

On the other hand, a welded metal intervening space is present at a portion corresponding to the groove gap L (see FIG. 5) of the two reinforcing bars 6 and 7 in a substantially middle portion of the above-mentioned support column 3, that is, the other end portion of the outer pipe 1. The semi-cylindrical receiving portion 9 located at the position is detachably attached.

That is, while the bracket 10 is welded and fixed to the outer pipe 1 described above, the tongue piece 9b is welded and fixed to the semi-cylindrical receiving portion main body 9a, and the tongue piece 9b is provided with two hexagon bolts or hexagon holes. It is removably attached to the bracket 10 using tightening members 11, 11 such as bolts.

Moreover, at least the surface of the above-mentioned receiving portion main body 9a facing the weld metal interposing space is formed of a difficult-welding material. That is, a copper plate or a ceramics plate may be adhered only to the arc-shaped inner surface facing the above-mentioned welded metal intervening space, or a fluororesin coating layer may be formed to form the receiving part main body 9a or the receiving part. The entire receiving portion 9 including the main body 9a and the tongue piece 9b may be made of copper or ceramics. In any case, the receiving portion 9 and the weld metal are configured not to be welded to each other.

Further, as shown in FIGS. 2 to 4, when the reinforcing bars 6, 7 are pressed and fixed by the butterfly bolts 8 to the V-shaped receiving pieces 5b of the supporting parts 5, 5, the reinforcing bars 6, 7 and the receiving member A predetermined welded metal intervening space 12 (see FIG. 4) is formed between the main body 9a and the main body 9a.

Further, as shown in FIG. 1, a projecting piece 13 is formed on the inner rod 2 in the vicinity of the bracket 10 by a screwing means or the like so as to project a predetermined portion of the outer pipe 1 inward of the pipe 1. Thus, the restriction portion 14 that restricts the movement of the inner rod 2 is formed, and the space portion 15 for inserting the tool tip of a spanner, a wrench, or the like is formed between the bracket 10 and the protruding piece 13 described above.

The illustrated embodiment is configured as described above, and the operation will be described below. First, as shown in FIG. 1, a reinforcing rod welding tool is attached to the reinforcing rods 6 and 7 in which the facing surfaces are butted, and the wing bolts 8 and 8 are tightened to support the reinforcing rods 6 and 7 as shown in FIGS. 2 to 4. The parts 5 and 5 are fixed to the inner surfaces of the V-shaped receiving pieces 5b and 5b.

Next, by inserting a tool tip of a spanner, a wrench, or the like into the space 15 between the bracket 10 and the projecting piece 13 and sandwiching the tool, the inner rod 2 and the support portion 5 are inserted. One of the reinforcing bars 7 is moved through the groove to form a groove interval L (same as the root interval) between the reinforcing bars 6 and 7, as shown in FIG.

Next, as shown in FIG. 6, the two reinforcing bars 6 and 7 are welded with the weld metal 16 by, for example, carbon dioxide welding means. After welding, the entire reinforcing bar welding tool described above is removed from the reinforcing bars 6 and 7 and used for welding work at the next welding site.

As described above, since the receiving portion 9 and the supporting portion 5 are integrally provided on the support column 3, when the supporting portion 5 is supported by the reinforcing bars 6 and 7, the support portion 5 is supported via the support column 3. The above-mentioned receiving portion 9 is located at the groove interval L corresponding portion of the two reinforcing bars 6, 7. Therefore, unlike the conventional case, the operator of the receiving portion 9 does not need to hold it by hand and does not need to perform temporary fixing welding, so that welding workability can be greatly improved.

In addition, since the above-mentioned receiving portion main body 9a is configured in a semi-cylindrical shape, there is no need for a complicated attaching operation, and the welding state of the reinforcing bars 6 and 7 can be surely visually confirmed. is there.

Since the supporting portions 5 and 5 described above are provided at both ends of the support column 3, the supporting structure for the supporting portion 9 is stable due to the both-end supporting structure, and one of the two reinforcing bars 6 and 7 is provided. There is an effect that the groove gap L can be easily formed between the two reinforcing bars 6 and 6 by moving the.

Further, since the above-mentioned strut 3 is composed of two slidable members (refer to the outer pipe 1 and the inner rod 2), the supporting portions 5 and 5 at both ends of the strut 3 are supported by the reinforcing bars 6 and 7, respectively. After that, the strut 3 made of two members is slid, specifically, the inner rod 2 is relatively moved with respect to the outer pipe 1, so that the groove gap L can be further easily provided between the two reinforcing bars 6 and 7. There is an effect that can be formed.

Moreover, since at least the surface of the receiving portion 9 facing the weld metal intervening space 12 is formed of a difficult-welding material such as copper, ceramics, or a fluororesin coating layer, the surface and the weld metal 16 are As a result, it is possible to repeatedly use the receiving portion 9 as described above, and it is possible to eliminate the conventional waste and to significantly reduce the welding cost.

Furthermore, since the receiving portion 9 is configured to be attachable to and detachable from the support column 3, when the receiving portion 9 is thermally deteriorated due to repeated welding work or when the arcuate surface of the receiving portion main body 9a is blocked. When the receiving portion 9 deteriorates, the receiving portion 9 can be easily replaced, and proper welding conditions can be maintained for a long period of time.

7 to 10 show another embodiment of the reinforcing bar welding tool, in which two leaf springs 17 and 17 in which a base piece 17a, a V-shaped receiving piece 17b and a reinforcing bar introducing piece 17c are integrally connected are provided. The base pieces 17a, 17a of these two leaf springs 17, 17 are fastened with rivets 18, 18 to form support portions 19, 19, and one support portion 19 is joined to one end portion of the outer pipe 1. The other support portion 19 is joined to the other end portion of the inner rod 2.

A screw rod 20 is protrudingly fixed to the outer pipe 1 having the flange portion 1a integrally formed on the other end portion thereof, and a semi-cylindrical receiving portion 21 can be attached to and detached from the tip end portion of the screw rod 20. At least the surface of the receiving portion 21 facing the welded metal intervening space 12 is formed of a difficult-welding material as in the previous embodiment.

Further, as shown in FIGS. 8 to 10, the openings 17 d, 17 d between the reinforcing bar introducing pieces 17 c, 17 c and the opening of the receiving part 21 are formed in the same direction, and the entire reinforcing bar welding tool is formed. By pressing the rebars 6 and 7 against the spring force of the leaf springs 17 and 17, the rebars 6 and 7 are supported by the support portions 19 and 19 at both ends of the support column 3 and, at the same time, the two rebars 6 and 7 are supported. The semi-cylindrical receiving portion 21 is located in the groove corresponding to the groove interval L with the welded metal intervening space 12 therebetween.

According to this structure, since the entire reinforcing bar welding tool can be attached / detached to / from the two reinforcing bars 6 and 7 with one touch, the welding workability can be further improved. . Since the other points have substantially the same actions and effects as those of the previous embodiment, the same parts as those in the previous drawings are designated by the same reference numerals and symbols in FIGS. 7 to 10, and detailed description thereof will be given. Is omitted.

FIG. 11 shows still another embodiment of the reinforcing bar welding tool, in which a supporting portion 5 is attached to one end of a pillar 3 made of a metal pipe via a bracket 4, and a tongue piece is attached to the other end of the pillar 3. 9b and a semi-cylindrical receiving part main body 9a are attached, and the welded metal intervening space 12 is present in the groove interval L corresponding part of the two reinforcing bars 6, 7 so that the receiving part main body 9a described above is present. And at least the surface of the receiving part body 9a facing the weld metal intervening space 12 is formed of a difficult-welding material such as copper, ceramics, or fluororesin coating as in the previous embodiment. ing.

In such a configuration, when the above-mentioned supporting portion 5 is supported by the reinforcing bar 6, the above-mentioned receiving portion 9 corresponds to the gap L between the two reinforcing bars 6 and 7 through the support column 3. Since it is located in the section, it is not necessary for an operator to hold the receiving section 9 by hand as in the conventional case and it is not necessary to perform temporary fixing welding, so that the welding workability can be greatly improved. There is.

In addition, since the above-mentioned receiving portions 6 and 7 are formed in a semi-cylindrical shape, a complicated adhesion device is unnecessary, and the welding state of the reinforcing bars 6 and 7 can be surely visually confirmed. effective.

Moreover, since at least the surface of the receiving portion 9 facing the weld metal intervening space 12 is formed of a difficult-welding material such as copper, ceramics, a fluororesin coating layer, etc., the weld metal between the surface and the weld metal is formed. As a result, the above-mentioned receiving portion 9 can be repeatedly used, and there is an effect that the conventional waste can be omitted and the welding cost can be significantly reduced.

FIGS. 12 to 18 show still another embodiment of the reinforcing bar welding tool. In this embodiment, two outer members 31 and 32, which are spaced apart from each other by welding means, are provided on the support portion 5 on one side, and these two members. The support column 30 is constituted by both the inner member 33 made of a metal square pipe slidably inserted into the outer members 31, 32, and the other end is formed at the end of the inner member 33 as shown in FIG. While the support portion 5 is directly fixed by welding, as shown in FIG. 15, the tongue piece 9b of the receiving portion body 9a is detachably attached to the inner portion of the inner member 33 by the bolt 34. Further, as shown in FIG. 12, an operating lever 35 is pivotally attached to the inner member 33 so as to be capable of undulating and an abutting piece 36 is integrally formed.

Further, as shown in FIGS. 16 to 18, the outer member 32 of the two outer members 31, 32 on the column end side is a pawl that is rotatable about a support shaft 37 (see FIG. 14). A wheel 38 is attached, and a plurality of, for example, four claw portions 39, 40, 41, 42 are integrally formed on the claw wheel 38 for the purpose of forming different groove intervals L (see FIG. 12). The protruding lengths of the claw portions 39 to 42 are made different in correspondence with the groove spacing L. Further, the inner member 33 is integrally formed with a protrusion 43 that comes into contact with one of the selected claws 39 to 42.

Here, the ratchet mechanism 38 may include a ratchet mechanism, and the protrusion 43 may be formed by cutting and raising from the inner member 33. The structure of the receiving portion 9 is the same as that of the previous embodiments.

In the reinforcing bar welding tools shown in FIGS. 12 to 18 thus configured, the reinforcing bar welding tools are first attached to the reinforcing bars 6 and 7 in which the facing surfaces are abutted against each other, and Fix 6 and 7. At this time, the protrusion 43 is in contact with the end surface of the outer member 32 as shown in FIG.

Next, after the inner member 33, the receiving portion 9, and the protrusion 43 are integrally moved in one direction via the operation lever 35, one claw portion, for example, the claw portion 40 is selected as shown in FIG. Then, the claw 40 is opposed to the protrusion 43.

Next, the inner member 33, the receiving portion 9, and the protruding portion 43 are collectively re-moved in the other direction via the above-described operation lever 35, and as shown in FIG. When the protrusion 43 is brought into contact with the groove 43, a groove gap L corresponding to the protrusion length of the claw 40 is automatically formed between the reinforcing bars 6 and 7.

Therefore, in the case of the configuration shown in FIGS. 12 to 18, one of the plurality of claw portions 39 to 42 is arbitrarily selected in accordance with the outer diameters of the reinforcing bars 6 and 7. There is an effect that the optimum groove interval L for the outer diameters of the reinforcing bars 6 and 7 can be automatically selected and formed.

In other respects, the same operation and effect as those of the first embodiment described above are obtained, and therefore, in FIGS. 12 to 18, the same parts as those in the previous drawings are designated by the same reference numerals and symbols. , Its detailed description is omitted.

In the correspondence between the configuration of the present invention and the above-mentioned embodiment, the two members according to claim 3 of the present invention are the outer pipe 1, the inner rod 2, the outer members 31, 32, and the inner member 33 of the embodiment. Correspondingly, similarly, the difficult-to-weld material corresponds to copper, ceramics, and a fluororesin coating layer, but the present invention is not limited to the configuration of the above-described embodiment.

[Brief description of drawings]

FIG. 1 is a side view showing a partial cross-section of a reinforcing bar welding tool of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG.

FIG. 4 is a cross-sectional view taken along the line CC of FIG.

FIG. 5 is a side view when forming a groove gap.

FIG. 6 is a side view at the time of welding connection.

FIG. 7 is a side view showing another embodiment of the reinforcing bar welding tool of the present invention.

8 is a sectional view taken along the line DD of FIG.

9 is a cross-sectional view taken along the line EE of FIG.

10 is a sectional view taken along the line FF of FIG.

FIG. 11 is a side view showing still another embodiment of the reinforcing bar welding tool of the present invention.

FIG. 12 is a side view showing still another embodiment of the reinforcing bar welding tool of the present invention.

13 is a sectional view taken along line XX of FIG.

14 is a cross-sectional view taken along the line YY of FIG.

15 is a cross-sectional view taken along the line ZZ of FIG.

FIG. 16 is a partial explanatory view of a reinforcing bar welding tool under a state where the reinforcing bars are opposed to each other.

FIG. 17 is a partial explanatory view of a reinforcing bar welding tool at the time of sliding a pillar.

FIG. 18 is a partial explanatory view of the reinforcing bar welding tool at the time of forming the groove gap.

FIG. 19 is an explanatory view showing a conventional reinforcing bar welded joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Outer pipe 2 ... Inner rod 3 ... Struts 5, 17 ... Support part 6, 7 ... Reinforcing bar 9,21 ... Receiving part 12 ... Weld metal intervening space 16 ... Weld metal L ... Groove space 30 ... Struts 31, 32 ... Outer Member 33 ... Inner member

Claims (5)

[Scope of utility model registration request] 1. A semi-cylindrical receiving portion located in a groove spacing corresponding portion of two reinforcing bars with a welded metal intervening space, a column supporting the receiving portion, and provided on at least one of the columns. And a supporting portion for supporting the support column on the reinforcing bar. 2. The reinforcing bar welding tool according to claim 1, wherein the receiving portion is provided at a substantially middle portion of the supporting column, and the supporting portions are provided at both end portions of the supporting column. 3. The reinforcing bar welding tool according to claim 2, wherein the support column is composed of two slidable members, and the groove interval is formed when the support column composed of two members slides. 4. The reinforcing bar welding tool according to claim 1, wherein at least a surface of the receiving portion facing the weld metal intervening space is formed of a difficult welding material. 5. The reinforcing bar welding tool according to claim 1, wherein the receiving portion is configured to be attachable to and detachable from the column.