JP3056345U - Crimping tool - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a crimping tool for lath connection which can efficiently and reliably perform connection and fixing work of laths at the time of assembling a lath formwork by a simple operation. SOLUTION: The tip of the rasuami is formed by a pair of tool constituent members comprising a caulking portion which is formed by crimping a joint portion of the rasuami by clamping and crimping, and a base end comprising a grip portion which is gripped by hand. A coupling / fixing tool, wherein one of the tool constituent members has a projecting portion that can be inserted into a mesh of the joint portion at a tip end of the tip portion, and is provided at a predetermined distance from the projecting portion. A V-shaped caulking floor, and a clamping portion that is further provided at a predetermined distance from the caulking floor and clamps a joint portion, and the other tool component member,
The tip portion is formed by bending in a sickle shape facing the one of the tool constituent members, and the protruding end is formed in a shape that can be in close contact with the center of the V-shaped concave portion of the caulking floor, and is formed by a rotating shaft. The two tool component members are rotatably connected to each other, and are configured so that when the pair of base end portions are squeezed, the joint portion held between the distal end portions can be crimped. tool.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a tool for connecting lath nets (metal nets for formwork) to be used for lath formwork at the time of placing concrete in construction, civil engineering, and the like. More specifically, the present invention relates to a crimping tool that clamps and crimps an object by gripping the same with a series of operations such as crimping, crimping, and fixing between joints of a rasami.

[0002]

[Prior art]

 Conventionally, there is no tool intended for this type of work, and when connecting lath nets in assembling the lath formwork, the joints of the lath nets were fixed together by binding wires such as wires.

[0003]

[Problems to be solved by the invention]

 However, as in the above-mentioned conventional example, in the connection operation using a binding wire, the binding portion of both laths to be connected is pulled, the binding wire is passed through a predetermined hole while being in close contact, and twisted with a hand or a plier to bind. Therefore, there is a problem that work efficiency is poor and much work time is required. In addition, there is also a problem that the work requires skill to uniformly tie with the binding wire so as not to twist or loosen the connected rasuami.

[0004] The present invention has been made in view of these problems, and a purpose of the present invention is to ensure that the connection and fixing work of the rasami can be reliably performed by a simple operation without requiring special skills and power. It is intended to provide a crimping tool.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention relates to a tool for connecting and fixing a rasuami for a rasta formwork, which can be used by being gripped with one hand. “)”, A pair of tool components consisting of a caulking portion that is clamped and crimped by pressing and crimping, and a grip portion that is held by hand at the base end. It has a projection that can be inserted into the mesh of the object, and has a V-shaped caulking floor that is provided at a predetermined distance from the projection, and further has a projection that is provided at a predetermined distance from the caulking floor to clamp the object. The other tool component is formed by bending its tip end in a sickle shape facing the one tool component, and its protruding end is in close contact with the V-shaped recess of the caulking floor. It is configured to be convex. The two tool components are rotatably connected to each other by a rotating shaft so that when the base ends of the two tool components are squeezed, the object held by the distal ends can be crimped. It is a crimping tool characterized by the following.

[0006] In the crimping tool according to the present invention, the protrusion provided at the tip of one of the tool constituent members has an outer angle of approximately 5 degrees with respect to a tangent to a circle centered on the rotation axis. It is characterized by being spread over Further, the protrusion is formed such that the cross section of the distal end portion is formed in a substantially circular rod shape, and the side facing the holding portion is tapered toward the end and the outer diameter of the end is reduced. The length of the projection is longer than the length of the holding portion.

[0007] With these features, when the base end is squeezed, the projection can be easily inserted into the mesh of the object, and the object can be reliably attracted and pinched to bring both connecting portions into close contact. It becomes possible. Further, the grip portion of the crimping tool according to the present invention is characterized in that it is coated in a bag shape with a non-slip material, such as rubber, in order to enhance operability by securely gripping the tool. . In order to achieve this object, the coating is not limited to the above, and a coating may be formed by winding vinyl chloride tape or leather, or by dip coating.

[0008] The tool component is made of a super hard material, for example, a material obtained by quenching steel, but is made of another metal or high metal having a hardness sufficient to achieve the purpose. It goes without saying that a material made of molecular resin may be used.

[0009]

[Embodiment of the invention]

 Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the accompanying drawings. When casting concrete to form the wall structure in construction, civil engineering, etc., form walls are used to form the walls of the building. This formwork is usually a lath formwork (metal net formed with a mesh of about 15 mm x 8 mm) in order to solidify the concrete after casting and improve the efficiency of post-processing. As shown in the figure, a plurality of laths 1 are installed in a predetermined width, the outside of the frame is supported by a pipe 3 in the longitudinal direction, and a separator (form holding reinforcing bar) 4 penetrating through the laths 1 and protruding outwards, and a fastening fitting. 5 is fixed and the formwork is assembled. However, when a plurality of standard rasami is installed in the longitudinal direction of the frame, it is necessary to connect the rasami together. For this reason, as shown in FIG. 3 (b), the joints 2 made of an iron plate having a thickness of about 0.5 mm are provided on the laths 1 and 1 '. It was tied and fixed through a binding wire through the hole, but it took a lot of time to work. The crimping tool according to the present invention realizes the above-described connection operation of lath net extremely efficiently.

As shown in FIG. 1 and FIG. 2- (a) plan view, and FIG. 2- (b) AA sectional view, the crimping tool of the present embodiment is made of hardened steel material and formed with a predetermined thickness. A pair of tool constituent members 10 and 20 are rotatably connected by pins 30. One of the tool components 10 has a grip 70 at its base end as shown in FIG. 1 and is provided with three projections at its front end facing the front end of the other tool component 20. I have. The projection 40, which is provided at the tip of the tip and is bent in a substantially L-shape in the direction of the pin 30, is shaped like a rod with a substantially circular cross section at the tip so that it can be inserted into the mesh of the joint 2 of the rasami. It is formed so that the side facing the pin 30 is tapered toward the end and the outer diameter of the end is reduced. As shown in FIG. 2, the projection 40 extends outwardly at an angle of about 5 degrees with respect to a tangent to a circle centered on the rotation axis.

Further, a V-shaped caulking floor 60 is provided at a distal end of the protruding portion 40 at a predetermined distance from the protruding portion 40 and presses and caulks the object, and is provided at a predetermined distance from the caulking floor 60. And a holding portion 90 for holding the object. As is clear from FIG. 2, the length of the holding portion 90 is shorter than the length of the protrusion 40, and the side facing the protrusion 40 is formed flat so as to easily hold the object. With these configurations, when the base end portion is squeezed and tightened, it rotates and makes it easy to insert the protruding portion that is inserted into the mesh of the joint portion 2, and the pull-out portions 1 and 1 ′ are securely pulled and pinched, and the joint portions 2 are joined together. Can be brought into close contact with each other.

In the present embodiment, the holding surface of the holding portion 90 is formed to be smooth. However, a large number of parallel projections having a fine pitch may be provided on the surface to make the holding object less slippery. good. The other tool component member 20 has a grip portion 80 at its base end, and is formed at its distal end so as to be bent in a sickle shape facing the tool component member 10, and its protruding end is in close contact with the concave portion of the caulking floor 60. It is provided with a caulking portion 50 formed in a protrudable shape. Then, when the base ends of the two tool constituent members 10 and 20 joined by the pin 30 are squeezed, the joint portion 2 of the laths 1 and 1 ′ held by the protrusion 40 and the holding portion 90 is swaged by the caulking portion 50. It is configured so that crimping can be performed.

As shown in FIG. 3C, the crimping tool of the present embodiment configured as described above is gripped at a substantially right angle to the lath aluminum, and the V-shaped ends are attached to the ends of the laths 1 and 1 ′. As shown in FIG. 3 (b), the joints 2 which are overlapped with each other are sandwiched by the tool tip. Then, while pressing the holding portion 90 against the front portion (closed side of the V-shape) of the joint portion 2, the front end of the projection portion 40 is fitted into the rear mesh portion of the joint portion 2 (the open side of the V-shape). Subsequently, when the grip portions 70 and 80 are squeezed in a state where both the joint portions 2 are sandwiched between the sandwiching portion 90 and the protruding portion 40, the tip portions of the tool constituent members 10 and 20 joined by the pin 30 approach each other. When the caulking portion 50 and the caulking floor 60 are narrowed, the overlapping side surfaces of the two joint portions 2 come into close contact with each other. At the same time, the projection 40, which has an outward extension of approximately 5 degrees with respect to the tangent of the circle centered on the pin 30, and whose protruding end portion is formed in a tapered shape, makes contact with the holding portion 90 with the rotation. As a result, the gap between the joints 2 is reduced, and a force for pressing the front part (closed side of the V-shape) of the joint part 2 against the holding part 90 is generated.

When the grip portion is pressed down while grasping the grip portion as it is, the holding portion 90 functions as a lever with the projection portion 40 inserted into the mesh of the joint portion 2 as a fulcrum, and the holding portion 90 is moved to the front portion of the joint portion 2 ( The V-shaped portion (closed side) is strongly pressed so that both V-shaped portions are brought into close contact with each other and the joint portion 2 can be firmly held. Further, when the grip portions 70 and 80 are further squeezed in this state, the caulking portion 50 caulks the side surface of the joint portion 2 to the floor 60, and as shown in FIG. 1 and the joint 2 of the lath 1 'are crimped in a V-shape, and both are fixed.

In this way, a plurality of rasami can be easily connected. Note that the operation method of the crimping tool of the present embodiment in the above description is one example, and is not limited to this. As another method, for example, the protrusion 40 is first inserted into the mesh of the joint 2, and the crimping tool is pulled toward the user so that the V-shaped portions of the two joints 2 are held in close contact with the holding portion 90, and simultaneously. It is possible to instantaneously perform a process of pressing down the grip portions 70 and 80 and further squeezing the joint portion 2 with the caulking portion 50 and the caulking floor 60 so as to crimp the joint portion 2 as a series of operations.

Further, in the present embodiment, the outward spread angle of the projection 40 is set to approximately 5 degrees. However, the size of the mesh of the object makes it easy to fit the mesh, and the object is securely drawn and pinched. It is needless to say that it is desirable to set an optimum angle that can be obtained. The same applies to the relationship between the length of the holding portion 90 and the length of the protruding portion 40. However, in the present embodiment, a ratio of approximately 1: 1.4 is set as a desirable value.

Further, the grip portions 70 and 80 at the base end portions are coated with a rubber material in a bag-like shape 100 so as to improve operability by securely gripping the crimping tool, so that the grip portions 70 and 80 are configured to be hard to slip. I have. In order to achieve this object, not only rubber but also a non-slip material such as vinyl chloride tape or leather may be wound or a coating may be formed by dip coating.

As shown in FIGS. 5A to 5C, a tool operation such as providing a coil spring 200 or a wire spring 300 between grip portions, or providing a hinge spring 400 on a rotating shaft is provided. Of course, it can be implemented in various ways for convenience. In addition, the tool component of the present embodiment is made of a hardened steel material, but is not limited to steel, and may be made of another metal or a metal having a hardness sufficient to achieve the object of the present invention. It goes without saying that a polymer resin material may be used.

[0019]

[Effect of the invention]

 As described above, according to the present invention, a series of operations such as pulling, clamping, crimping, and caulking the joint of the lath in the lath-ami assembling work during the construction of the lath formwork are instantaneously performed by simple operations. It can be sufficiently fixed simply by caulking the Rasami joint, so that the working time can be greatly reduced as compared with the conventional connection using binding wires. In addition, large amounts of power and skill are not required for operation, and the connection and assembly of the rasami can be done in a short time. This contributes to shortening the construction period and cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a view illustrating one mode of use of the crimping tool according to the present invention.

FIG. 4 is an enlarged view illustrating one mode of use of the crimping tool according to the present invention.

FIG. 5 is a view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rasami 1 'Rasami 2 Joint part 3 Pipe 4 Separator (Form holding rebar) 5 Clamping fitting 10 Tool constituent member 20 Tool constituent member 30 Pin 40 Projection part 50 Caulking part 60 Caulking floor 70 Grip part 80 Grip part 90 Nipping part 100 coating

Claims (6)

[Utility model registration claims] 1. A tool for connecting and fixing a rasami which can be used by being gripped with one hand, wherein a tip portion is a caulking portion which clamps and crimps an object, and a base end portion is a hand. A pair of tool components, each of which is a grip portion to be gripped; one of the tool components has a projection that can be inserted into a mesh of the object at a protruding end of a distal end thereof; A V-shaped caulking floor provided at an interval of, and a clamping portion provided at a predetermined interval from the caulking floor and configured to clamp an object, and the other tool component member,
The tip portion is formed by bending in a sickle shape facing the one of the tool constituent members, and the protruding end is formed in a shape that can be in close contact with the center of the V-shaped concave portion of the caulking floor, and is formed by a rotating shaft. A crimping tool, wherein the two tool components are rotatably coupled to each other so that when the pair of base portions are squeezed, the object held by the tip portions can be crimped. . 2. The method according to claim 1, wherein the projecting portion of the one tool component member is configured to extend outward at an angle of approximately 5 degrees with respect to a tangent to a circle centered on the rotation axis. The crimping tool according to claim 1, wherein 3. The projection of the one tool component member is formed in a rod shape having a substantially circular cross section at the tip of the projection, and the tip facing the rotating shaft is formed so as to have a smaller outer diameter. The crimping tool according to claim 1, wherein the crimping tool is configured to be inclined and tapered. 4. The crimping tool according to claim 1, wherein the protrusion of the one tool constituent member is configured such that the length of the protrusion is greater than the length of the holding portion. 5. The crimping tool according to claim 1, wherein the grip at the base end is covered with a non-slip material. 6. The crimping tool according to claim 1, wherein the tool component is made of a carbide material.