JP4665058B1 - Fire powder curing tool for rebar cutting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economical rebar fusing powder curing tool for rebar fusing which can be safely performed without causing danger to surrounding workers without using a gas burner to cut a deformed rebar. To provide.
A case body is provided with a window portion 11 in the center of a front surface, and a guide groove 12 in which a deformed reinforcing bar R can be loosely fitted on the front surface is provided vertically so as to pass through the window portion 11. The instrument main body 1 is formed by attaching bent pieces 13 and 13 having a folding portion 13a in the vertical direction at the tip at a position sandwiching the guide groove 12 on the lower surface or the upper surface of the case; And a wedge-shaped plate member 2 having a shape in which the width gradually increases from the end toward the other end.
[Selection] Figure 1

Description

  The present invention relates to an improvement in a fire powder curing tool for rebar cutting, and more specifically, a flame powder curing tool for rebar cutting that can safely perform a fusing operation of a deformed reinforcing bar using a gas burner and can also handle a reinforcing bar having a different diameter. It is about.

  As is well known, many concrete slabs and concrete walls in buildings have reinforcing bars as reinforcements, and these reinforcing bars have irregular shaped reinforcing bars with rounded steel sides to improve adhesion to concrete. Is used.

  In addition, regarding the processing of the above-mentioned deformed rebar, generally, the gas rebar is used to heat and melt the rebar for cutting, but at that time, many sparks and molten balls are scattered from the heated part, Not only is it extremely dangerous for the surrounding workers, but there is also a risk of a fire by jumping to the surrounding combustible materials.

  Therefore, in the past, a spark powder curing tool has been developed that covers the melted portion of the reinforcing bar in advance with a case body during the melting operation of the deformed reinforcing bar (see Patent Document 1). By using it, surrounding workers and materials are protected from sparks.

  By the way, the spark-curing device according to the above-mentioned document 1 can be opened and closed by hinge-connecting the parts divided in the vertical direction, and a semicircular notch is formed on the upper and lower surfaces of each part. The case can be fixed to the reinforcing bar by fitting the notch into the annular groove of the deformed reinforcing bar.

  However, in the above conventional spark-curing tool, since it is necessary to have a notch portion of a size that fits the annular groove of the deformed reinforcing bar, the same instrument cannot be used for reinforcing bars of different diameters. At the site where thick reinforcing bars are handled, it is necessary to prepare a large number of instruments according to the diameter, and it is easy to waste costs.

Japanese Utility Model Publication No. 59-29793 (page 1-3, FIGS. 1-4)

  The present invention has been made in view of the above-described problems, and the object of the present invention is to safely carry out the fusing work of deformed reinforcing bars using a gas burner without causing danger to surrounding workers. In addition, an object is to provide an economical flame curing tool for fusing reinforcing bars that can be used for reinforcing bars of different diameters.

  Means employed by the present inventor for solving the above-described problems will be described with reference to the accompanying drawings.

That is, the present invention is a case body provided with a window portion 11 in the center of the front surface, and a guide groove 12 in which a deformed rebar R can be loosely fitted on the front surface so as to pass through the window portion 11. The instrument main body 1 is formed by attaching bent pieces 13 and 13 having upper and lower folded portions 13a to the front end at positions sandwiching the guide groove 12 on the lower surface or the upper surface of the case; A wedge-shaped plate material 2 having a shape in which the width gradually increases from one end to the other end,
The wedge-shaped plate member 2 is inserted between the folded portions 13a and 13a of the left and right bent pieces 13 and 13 and the annular groove D of the deformed reinforcing bar R with the deformed reinforcing bar R loosely fitted in the guide groove 12 of the instrument body 1. This is characterized in that the instrument body 1 can be fixed to the deformed reinforcing bar R.

In the present invention, in addition to the above technical means, if necessary, a back plate 14 is attached to the back side of the rear wall portion B of the instrument body 1, and the rear wall portion B heated by a gas burner or sparks during the fusing operation. It is also possible to adopt a technical means for promoting the heat dispersion and heat dissipation of the rear wall portion and improving the heat resistance of the rear wall portion B.

  In addition, in the present invention, in addition to the above-described technical means, a technical means for improving the heat insulating property by the hollow portion 15 between the walls with a double-wall structure as the case outer wall of the instrument body 1 may be adopted. it can.

  Further, in the present invention, in addition to the above technical means, a technical means that forms a window portion 11 wider than the guide groove 12 in the instrument main body 1 and expands the reception port of the spark can be adopted as necessary. .

  On the other hand, in the present invention, in addition to the technical means described above, the technical means for preventing the loss of the wedge-shaped plate member 2 by connecting the instrument body 1 and the wedge-shaped plate member 2 by the connecting chain 21 or the connecting wire. Can also be adopted.

  Further, in the present invention, in addition to the above technical means, if necessary, the technical means that the handle portion 16 of the instrument body 1 is provided to be tilted in the front-rear direction on the instrument side so as not to contact the adjacent deformed reinforcing bar is adopted. You can also.

Further, in the present invention, in addition to the above technical means as required, both ends (31) include a fall prevention wire (3) or a fall prevention chain that can be detachably connected to each other. By means of the prevention wire (3) or the fall prevention chain, the handle portion (16) of the instrument body (1) and the horizontal member disposed above the instrument body (1) are connected to prevent the fall. Technical means can also be employed.

  In the present invention, the appliance main body of the spark curing tool is manufactured by a case body having a window hole and a guide groove on the front surface, and a bent piece is provided at a position sandwiching the guide groove on the lower surface of the case. After loosely fitting the deformed reinforcing bar into the guide groove of the tool body, simply insert the wedge-shaped plate material into the gap formed between the folded part of the bent piece and the annular groove of the deformed reinforcing bar, and simply attach the tool body to the deformed bar Can be fixed.

  In addition, by adopting the above fixing means, the same instrument can be reused for deformed reinforcing bars with different diameters simply by changing the insertion depth of the wedge-shaped plate material (when the deformed reinforcing bar has a large diameter, it is inserted shallowly, the small diameter In this case, it is not necessary to purchase a tool for each diameter of the reinforcing bar, and there is a merit in cost.

  In addition, since the instrument body can be attached not only to the reinforcing bars arranged in the vertical direction but also to the reinforcing bars arranged in the lateral direction without problems, the work safety is ensured without causing inconvenience in the fusing work. Can be realized.

  Therefore, according to the present invention, it is possible to protect a worker from dangers such as burns and fires in the conventional fusing work of rebar, which has had a safety problem, and to provide a fire-curing tool for rebar fusing that can keep equipment costs low. Since it can be provided, the practical utility value of the present invention is very high.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole perspective view showing the fire-curing curing tool in Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall bottom view showing a fire powder curing device in Example 1 of the present invention. It is the front view and side view showing the attachment state of the spark powder curing device in Example 1 of this invention. It is sectional drawing seen from the lower side showing the attachment state of the spark powder curing tool in Example 1 of this invention. It is a whole perspective view showing the use condition of the spark powder curing device in Example 1 of this invention. It is a longitudinal cross-sectional view showing the structure of the spark-curing tool in Example 1 of this invention. It is a whole perspective view showing the spark powder curing tool in Example 2 of this invention. It is sectional drawing seen from the lower side showing the attachment state of the spark powder curing tool in Example 2 of this invention. It is a whole front view showing the attachment state of the spark powder curing tool in Example 2 of this invention. It is a whole side view showing the form of the bending piece of the spark curing tool in the modification of this invention. It is a whole side view showing the form of the back board of the spark curing device in the modification of this invention.

“Example 1”
First, a first embodiment of the present invention will be described with reference to FIGS. In the figure, what is indicated by reference numeral 1 is the appliance body of the spark-curing tool, and what is indicated by reference numeral 2 is a wedge-shaped plate material.

  In the first embodiment, the instrument body 1 is manufactured from a case body (made of stainless steel) having a window portion 11 in the center of the front surface, and the window portion 11 passes through the front surface of the case body. A guide groove 12 having an arcuate cross section is provided in the vertical direction (see FIGS. 1 and 2).

  In addition, the instrument body 1 is provided at a position sandwiching the guide groove 12 on the lower surface of the case with the bent pieces 13 and 13 having a U-shaped folded portion 13a whose front end portion is bent downward projecting forward. is doing.

  On the other hand, the above-mentioned spark-curing tool includes a wedge-shaped plate material 2 in addition to the instrument body 1. Incidentally, the wedge-shaped plate member 2 has a shape that gradually increases in width from one end to the other end, and can be inserted inside the folded portions 13a and 13a of the bent pieces 13 and 13 of the instrument body 1. Designed to size.

  3 (a) and 3 (b), with the deformed reinforcing bars R loosely fitted in the guide grooves 12 of the instrument body 1, the bent portions 13a and 13a of the left and right bent pieces 13 and 13 are deformed. If the wedge-shaped plate member 2 is inserted between the annular grooves D of the reinforcing bars R, the instrument body 1 can be fixed at a predetermined position of the deformed reinforcing bars R. Of course, it is possible to attach not only to the deformed reinforcing bars R arranged in the vertical direction but also to the deformed reinforcing bars R arranged in the horizontal direction.

  Moreover, by adopting the above mounting structure, a wedge-shaped plate material can be used for both large-diameter deformed reinforcing bars R as shown in FIG. 4 (a) and small-diameter deformed reinforcing bars R as shown in FIG. 4 (b). Since it can be easily attached only by changing the depth at which 2 is inserted, it can also be used for deformed reinforcing bars having different diameters.

  Then, as shown in FIGS. 5 (a) and 5 (b), if the deformed rebar R is heated with a gas burner with the appliance main body 1 attached, sparks and minute molten balls generated from the heated portion can be removed from the window portion 11. Since it can be accommodated in the case, it is possible to safely perform the fusing operation without the sparks being scattered or falling.

  Incidentally, in Example 1, the width of the window portion 11 is made larger than that of the guide groove 12 so that the flame of the gas burner does not hit the front surface of the instrument body 1 at the time of fusing work, and in order to expand the receiving port for sparks and molten balls. Designing.

  Moreover, in Example 1, as shown in FIG. 6, the backplate 14 is attached to the back surface of the rear wall part B of the instrument body 1, and the heat of the rear wall part B, which has become high temperature due to burner flames or sparks, is efficiently obtained. It is possible to disperse and absorb, thereby preventing local heat accumulation and improving the heat resistance of the rear wall portion B. In addition, the cooling effect can be improved by increasing the heat radiation area by the back plate 14.

  Furthermore, in Example 1, the case back side has a double wall structure by providing a space outside the rear wall B of the instrument body 1 and providing an outer wall W. And since the hollow part 15 between walls can interrupt | block heat transfer and can obtain a heat insulation effect by this, even when the back surface of the instrument main body 1 touches clothes or materials after fusing work, clothes etc. are heated at high temperature. There is no worry about damage.

  On the other hand, in the first embodiment, a handle 16 is provided on the side of the case so that the instrument body 1 can be easily carried, and the wedge-shaped plate member 2 and the instrument body 1 are connected to the handle 16 through a connecting chain 21 to thereby form a wedge shape. It is possible to prevent the plate material 2 from being dropped during use or lost when not in use.

“Example 2”
Next, Example 2 of the present invention will be described below with reference to FIGS. In the figure, what is indicated by reference numeral 3 is a fall prevention wire. In this Example 2, as shown in FIG.7 and FIG.8 (a), it forms deeper than the maximum diameter of the deformed reinforcing bar R which uses the guide groove 12 of the instrument main body 1, and, thereby, the spark which scattered at the time of fusing Is easily accommodated in the case.

  Moreover, as shown in FIG.8 (b), the instrument main body 1 can be attached to the deformed reinforcing bar R from which a diameter differs like Example 1 by changing the insertion depth of the wedge-shaped board | plate material 2. As shown in FIG. Moreover, in Example 2, when attaching the instrument main body 1 to the deformed reinforcing bar R, the handle part 16 is provided to be inclined in the front-rear direction so that the handle part 16 does not get in contact with the adjacent reinforcing bar.

Further, in the second embodiment, as shown in FIG. 9, the configuration of the spark-curing tool includes the fall-preventing wire 3 in which both end portions 31 and 31 are detachable, and the fall-preventing wire 3 is used as the handle portion of the instrument body 1. By connecting the horizontal member disposed above the instrument main body 1 through the instrument 16 and the instrument main body 1, the instrument main body 1 is prevented from falling even when the wedge-shaped plate material 2 is loosened due to impact or the like during use.

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the claims. For example, The material of the instrument body 1 may be other metal material or ceramic material as long as it has heat resistance, and only partially heat-resistant material is used only for the rear wall portion that is likely to become hot. You can also

  Further, with respect to the bent piece 13 of the instrument main body 1, even if a bar-like member having a bent tip is not used, if the shape has a folded portion 13 a at the tip, the bent piece 13 is centered as shown in FIG. It is also possible to use a plate material having elongated holes.

  Further, as shown in FIG. 10 (b), bent pieces 13 and 13 are provided on both the upper and lower sides of the instrument body 1, and wedge-shaped plate members 2 and 2 are inserted into the respective bent pieces 13 and 13 'to form deformed reinforcing bars R. It is also possible to fix at two places. In this case, after the reinforcing bar is melted, a situation in which the free upper reinforcing bar collapses can be prevented.

  On the other hand, the back plate 14 attached to the rear wall portion B of the instrument body 1 is also changed to a corrugated plate material having a large heat radiation area or cooling fins FF as shown in FIGS. 11 (a) and 11 (b). In addition, with respect to the double wall structure, not only the back portion but also the entire side wall of the instrument body 1 can be a double wall.

  Further, the connecting wire 21 that connects the instrument body 1 and the wedge-shaped plate member 2 and the fall prevention wire 3 that connects the instrument body 1 and the horizontal member can be replaced by a connection wire and a fall prevention chain, respectively. Any of them belong to the technical scope of the present invention.

  In recent years, deformed reinforcing bars have become indispensable reinforcing materials for concrete structures as seen in reinforced concrete structures. In addition, at work sites for reinforcing bars that handle high-heat-power gas burners, users need to work to prevent occupational accidents.

  Under such circumstances, the fire-curing tool for rebar cutting of the present invention is useful for protecting workers from sparks and molten balls and improving safety, and also reducing the economic burden on the user. Therefore, the industrial utility value is very high.

1 Instrument body
11 Window
12 Guide groove
13 Bending piece
13a Folding part
14 Back plate
15 Hollow part
16 Handle part 2 Wedge plate
21 Connecting chain 3 Fall prevention wire
31 End R Deformed bar D Annular groove B Rear wall W Outer wall F Cooling fin

Claims (7)

A window portion (11) is provided at the center of the front surface, and a guide groove (12) in which the deformed reinforcing bar (R) can be loosely fitted on the front surface is provided vertically so as to pass through the window portion (11). A case body with a bent piece (13, 13) having a folded portion (13a) in the vertical direction at the tip protruding at a position sandwiching the guide groove (12) on the lower or upper surface of the case. An instrument body (1), and a wedge-shaped plate member (2) having a shape that gradually increases in width from one end to the other end.
With the deformed rebar (R) loosely fitted in the guide groove (12) of the instrument body (1), the folded portions (13a, 13a) of the left and right bent pieces (13, 13) and the deformed rebar (R) A fire-curing tool for cutting a reinforcing bar, characterized in that the instrument body (1) can be fixed to the deformed reinforcing bar (R) by inserting a wedge-shaped plate (2) between the annular grooves (D). 2. A fire-curing tool for rebar cutting according to claim 1, wherein a back plate (14) capable of dispersing and absorbing heat is attached to the back side of the rear wall (B) of the instrument body (1).   The fire powder curing tool for fusing reinforcing bars according to claim 1 or 2, wherein the case outer wall of the instrument body (1) has a double wall structure and heat insulation is enhanced by a hollow portion (15) between the walls.   4. A fire-curing tool for rebar cutting as defined in any one of claims 1 to 3, wherein the instrument body (1) has a window (11) wider than the guide groove (12).   5. The fire-curing tool for rebar cutting as claimed in claim 1, wherein the instrument body (1) and the wedge-shaped plate (2) are connected by a connecting chain (21) or a connecting wire. .   6. A fire-curing tool for reinforcing bar cutting according to any one of claims 1 to 5, wherein a handle portion (16) is provided on the side surface portion of the instrument body (1) so as to be inclined in the front-rear direction. Both ends (31) are configured to include a fall prevention wire (3) or a fall prevention chain that can be detachably connected to each other, and the fall prevention wire (3) or the fall prevention chain is used to The handle part (16) and a horizontal member arranged above the instrument body (1) are connected to prevent falling, according to any one of claims 1 to 6. The fire powder curing tool for rebar cutting described.