JP5395976B1 - Fastening tool for fastening band and fastening method - Google Patents

Abstract

Provided is a steel tightening band tightening tool that is easy to manufacture with a simple and small structure, has excellent workability, and can be used in work in high places and unstable places, and for air conditioning. To provide a tightening method of a tightened body that efficiently connects a pipe and a flexible duct.
A steel tightening band tightening tool according to the present invention includes a main end portion (A) having a front end portion having a steel tightening band insertion port, a pair of side plates having a shaft insertion hole and a back plate, and a central portion. An opening for inserting a steel fastening band; a shaft through which each shaft insertion hole of the side plate is inserted; a pair of disks erected on both sides of the opening of the shaft; and a main body (A) At least one end of the shaft protruding from the side plate has a rotating part (B) consisting of a power supply connecting part for rotating the shaft, and the tightened part is tightened by winding the inserted steel fastening band. Done.
[Selection] Figure 1

Description

  The present invention relates to a steel fastening band tightening tool, and more specifically, the other end portion of the steel fastening band is inserted into a band holder holding one end portion of the steel fastening band, and the other end portion is moved forward. The present invention relates to a steel tightening band tightening tool for performing tightening while pulling out, and a tightening method of a body to be tightened using the tightening tool.

  In recent years, a method using a fastening band has been used in various applications including joining of air conditioning piping and a flexible duct. As fastening bands, in addition to those made of plastic such as polypropylene and nylon, recently, steel fastening bands are frequently used because of their performance such as toughness and durability. For example, construction examples using flexible ducts for joining pipes in air-conditioning piping work are widespread, but in this construction, it is necessary to perform screwing to prevent disconnection after tightening with a fastening band. Yes, steel fastening bands are used exclusively as fastening bands suitable for screwing.

  In tightening the object to be fastened using the steel fastening band, it is necessary to feed the fastening band forward using a tool. As a tool for that purpose, Patent Document 1 discloses that the fastening band is moved forward by a handle operation. A handle-type tool is described that moves and thereby generates a clamping force. Patent Document 1 describes that the use of a handle type improves the efficiency of feeding a tightening band as compared with a conventionally known pistol type tool. However, the handle type tool is inferior in workability because the handle must be manually operated.

  Non-Patent Document 1 describes a construction method that connects a piping for air conditioning and a flexible duct for silencing that is easy to bend, using a steel fastening band, a band holder, and a dedicated fastening tool. This method is performed as shown in FIGS. 6B and 6C using a band holder 6 as shown in FIG. That is, one end (rear end) (b1) of the steel fastening band is bent and locked to the bottom surface 61 of the band holder 6, and the fastening band is turned around the to-be-clamped portion of the duct. Then, the front end (front end) (b2) of the tightening band is pulled forward by the tightening tool T, the abutting between the band retainer 6 and the tightening tool T, and the action of the pulling force by the tightening tool. The tightening part is tightened by. After completion of tightening, the tightening band is bent and locked to the upper surface 62 side with the front end of the band holder 6 as a fulcrum, and the excess tightening band beyond the part (b3) necessary for maintaining the tightening force is It is cut by the cutting blade provided in.

  According to the method described in Non-Patent Document 1, the pipe and the duct can be connected by a simple operation. On the other hand, the tightening tool is a method that feeds the tightening band forward by manually pressing the lever, so the work efficiency is not always sufficient, the tool structure is complicated and the manufacturing cost is high, and it is large and heavy. There are problems such as high load and not suitable for work in high places and unstable places.

  Further, Non-Patent Document 2 describes a large drum winding type tightening machine used when a package is tightened with a steel tightening band (not shown). This tightening machine is of a type in which a steel tightening band around a package is set on a rotating drum, the steel tightening band is wound by operating a tightening lever, and tightening is performed. However, this tightening machine is used for packaging that requires a strong tightening force in the fields of assembly houses, bridges, steel heavy machinery, steel coils, etc., and its weight is very heavy, more than 5Kg. It was completely unsuitable for work in high places and unstable places.

Japanese Patent No. 2836023

Fukakawa Manufacturing Co., Ltd. General Catalog “Duct materials” (searched on June 1, 2013) Internet <URL: http://www.ductnet.com/catalog.php?page=177http://www.ductnet.com/ catalog.php? page = 177> Fudaba Sangyo Co., Ltd. Catalog “Band iron manual binding machine” (searched on June 1, 2013) Internet <URL: http://www.fudaba-sangyo.com/tejime.htmhttp://www.fudaba-sangyo .com / tejime.htm>

  The present invention is intended to solve the problems of the background art as described above, and its main purpose is to be easy to manufacture with a simple and small structure, and to improve workability by making an electric tool available. It is an object of the present invention to provide an improved tool for tightening a steel band that can cope with work in high places and unstable places. Another object of the present invention is to provide a tightening method of a tightened body suitable for a construction method for efficiently connecting an air conditioning pipe and a flexible duct.

  As a result of intensive studies to develop a tool having a structure capable of using an electric tool instead of a conventionally known handle type or lever type tool, the present inventor has a method of winding a steel fastening band by a shaft. In terms of workability, the wound steel fastening band can be removed by rotating the shaft in the reverse direction. In addition, if the air conditioning pipe and the silencer duct are connected, it is installed. The present invention has been completed by paying attention to the fact that there is no need to cut an extra fastening band because the place is almost invisible.

  Thus, according to the present invention, first, a main body portion including a front end portion having an insertion port for a steel fastening band, a pair of side plates having a shaft insertion hole for passing a shaft of a rotating portion (B) and a back plate. (A) and a rotatable rotating part (B) for tightening the tightened part by winding the inserted steel fastening band, and the rotating part (B) A shaft having at least one opening for inserting a steel fastening band; a shaft through which each shaft insertion hole of the side plate is inserted; a pair of disks standing on both sides of the opening of the shaft; A tightening tool for a steel fastening band provided with a power supply connecting portion for rotating the shaft at at least one end of the shaft protruding from the side plate of A) is provided.

    Secondly, one end of the steel fastening band is held by a band holder through which the steel fastening band can be inserted, and the steel fastening band is rotated around the fastening portion of the body to be fastened, and the other end is In the tightening method of tightening the object to be fastened by inserting the other end in the forward direction after passing through the band holder, the other end of the steel tightening band is connected to the steel tightening band of the steel tightening band tightening tool. Inserted into the opening for inserting the fastening band of the shaft through the insertion port, the contact between the front end of the main body (A) and the band holder and the rotation of the shaft of the rotating part (B) By tightening the tightening part by winding, after the tightening is completed, the steel fastening band is folded back with the tip of the front end of the main body (A) as a fulcrum, and then the shaft of the rotating part (B) is reversed. Fastening method of the clamping member is provided to remove the steel clamping band from the tightening tool.

  Since the steel fastening band fastening tool of the present invention has a simple and small structure, it is easy to manufacture and can be manufactured at low cost. Moreover, since it is a winding system by rotation of a shaft and an electric tool can be used, it is excellent in workability when tightening a tightening band. Furthermore, since it is small and lightweight, it reduces the burden on workers and is suitable for work in high places and unstable places. Moreover, according to the fastening method of the to-be-clamped body of this invention, a worker's load can be reduced and it can clamp | tighten a to-be-clamped body efficiently also in a high place and an unstable place.

FIG. 1 is a perspective view showing a preferred embodiment of a steel fastening band fastening tool of the present invention. FIG. 2 is a diagram schematically showing a plan view of the tightening tool. FIG. 3 is a diagram schematically showing a side view of the tightening tool on the side provided with the power supply connecting portion. FIG. 4 is a diagram schematically showing a front view and a plan view of the shaft of the tightening tool. FIG. 5 is an explanatory diagram for explaining a manufacturing process of the tightening tool. FIG. 6 is an explanatory diagram showing an outline of a structure and a tightening method of a band holder in the prior art.

  Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. In addition, each figure is for demonstrating invention, and does not represent the dimension of each component correctly.

<Tightening tool for steel fastening band>
As shown in FIG. 1, the steel fastening band fastening tool 1 of the present invention includes a main body (A) 2 and a rotating part (B) 4. The main body (A) 2 includes a front end portion 11 having a steel fastening band insertion port 12, left and right side plates 13, 14 having shaft insertion holes 16, 17 for fitting the shaft 41 of the rotating portion (B) 4, and A back plate 15 is provided.

  In this embodiment, the front end portion 11 of the steel fastening band fastening tool 1 is composed of an upper plate 18, a lower plate 19, and side plates 20, 21 for inserting the tip of the steel fastening band into the tip. An insertion port 12 is provided. The front end portion 11 has a tapered shape in which the height of the side plate gradually decreases toward the insertion port 12, and passes through the center point c of the insertion port 12 and is perpendicular to the center line L perpendicular to the insertion port 12. And it is symmetrical shape up and down. With the tapered structure, the degree of freedom of angle adjustment when the tip of the front end portion 11 abuts the holder is widened, and the steel fastening band can be pulled in a straight line, and the weight of the tool can be reduced. Also contribute.

  The insertion port 12 has an opening area that exceeds the cross-sectional area of the fastening band so that the fastening band can be inserted. Further, in order to exert the tightening force, it is necessary to abut the tip 22 of the front end portion 11 with a steel fastening band holder, which will be described later, so that the holder is not drawn into the insertion opening 12. It is in size. The size of the steel fastening band is usually 10 to 25 mm in width and 0.3 to 0.6 mm in thickness, and the size of the holder is usually 15 to 40 mm in width and 5 to 10 mm in height. The size of can be appropriately selected as long as the steel fastening band can be inserted and the holder is not retracted. Usually, it is 20-30 mm in width and 4-8 mm in height.

  The side plates 13, 14 on both sides constituting the main body (A) 2 have shaft insertion holes 16, 17 for fitting the shaft 41 of the rotating part (B) 4 substantially in the center. In this embodiment, the shaft insertion holes 16 and 17 are reinforced by reinforcing metal rings 45 and 46 on the outer surface of the side plate. By attaching the reinforcing metal ring, the rotation of the shaft becomes smooth and the strength of the side plate is improved. The size of the shaft insertion hole is usually 10 to 20 mmφ, and the size of the reinforcing metal ring is usually 1.5 to 2 times the diameter of the shaft insertion hole. The reinforcing metal ring can be attached according to a conventional method such as welding after the shaft insertion hole is formed in the side plate.

  The back plate 15 constituting the main body (A) 2 only needs to be integrated with the side plates 13 and 14 on both sides, and usually has the same height as the side plates 13 and 14 on both sides. In the embodiment shown in FIG. 1, a suspension hole 23 is formed in the center of the back plate 15 so that a worker can easily carry the tool.

  On the other hand, the rotating part (B) 4 includes a shaft 41 and a pair of discs 42 and 43. An opening 44 for inserting a steel fastening band along the rotation axis is provided at the center of the shaft 41. The pair of discs 42 and 43 are attached perpendicularly to the shaft 41 between both end portions of the opening 44 and the side plates 13 and 14. The shaft 41 is fitted into the shaft insertion holes 16 and 17 of the main body (A) 2, and a power supply connecting portion 47 is provided at one end of the shaft 41 protruding from both side plates. Yes. The other end may be the same as the power supply connecting portion 47, but is usually a manual tool operating portion 48 that enables rotation of the shaft with a manual tool.

  The shaft 41 is usually a rod-shaped steel material, and is formed into a desired shape using a mold. In the embodiment shown in FIG. 4, the central portion 49 of the shaft is formed with a step so as to be thicker than both sides thereof. By providing the step, the work of attaching the pair of disks is facilitated, the diameter of the shaft is increased, the strength is improved, and the efficiency of winding the fastening band is improved.

  The opening 44 has an opening area and depth that allows the fastening band to be inserted, and that the fastening band can be wound when the shaft 41 is rotated. The opening 44 is formed to be longer than the central portion 49 for convenience of inserting the fastening band, but may not necessarily have this shape as long as the fastening band can be inserted. Further, the opening 44 may be provided so as to penetrate the shaft 41, but in that case, the tip of the inserted steel fastening band jumps out to the opposite side of the shaft 41, thereby inhibiting the winding of the fastening band, Since there is a concern of damaging the operator's finger, the groove is usually formed in the shaft 41 without penetrating. In the case of the groove shape, as shown in FIG. 4B, it is preferable to provide a second opening 44a at a target position with reference to the center line of the shaft. In this way, a steel fastening band can be inserted on either side of the shaft.

  The pair of discs 42 and 42 are for winding and removing the steel fastening band by finger operation, before inserting the steel fastening band into the opening 44 and starting the winding operation with the electric tool, Used when the tightening operation is complete and the steel band is removed. The pair of discs 42 and 43 has a diameter larger than the height of the side plates 13 and 14 of the main body 2 so that the operation with fingers is easy, and the thickness is usually about 2 to 4 mm.

  The power supply connecting portion 47 provided at one end of the shaft 41 has a structure for connecting to a power source for rotating the shaft 41 (for example, an electric tool generally used in installation work of air conditioning piping). In general, the cross-sectional shape is a female structure having a hexagonal shape.

  The other end of the shaft 41 may have the same structure as the power supply connecting portion 47, but in this embodiment, the shaft can be rotated with a manual tool so that the work can be performed even when the power tool cannot be used. The manual tool operation unit 48 that enables A typical structure of the manual tool operation unit 48 is a hexagonal male structure such as a bolt head.

  The dimensions and weight of the steel fastening band fastening tool 1 of the present invention can be appropriately selected within a range that can be easily operated by an operator. For example, if the total length of the main body (A) is about 10 cm, the diameter of the disc of the rotating part (B) is about 5 cm, and the length of the rotating part (B) shaft is about 6 cm, the total weight is 300 g or less. And a lightweight steel fastening band fastening tool.

<Manufacturing method of steel fastening band fastening tool>
The steel fastening band fastening tool of the above embodiment can be manufactured as shown in FIG. First, the main body member (a1) including the upper surface 18 of the front end portion of the main body portion (A), the side plate 20 of the front end portion, the side plate 13 having the shaft insertion hole 16 reinforced by the metal ring 45, and the back plate 15; A main body member (a2) including a lower surface 18 of the front end portion of the main body portion (A), a side plate 21 of the front end portion, and a side plate 14 having a shaft insertion hole 17 reinforced by a metal ring 46 is prepared. Place them face to face.

  Next, the shaft insertion holes 16 and 17 of the main body member (a1) and the main body member (a2) have an opening 44 into which a steel fastening band is inserted at the center, and at least one end is provided with a power supply connection portion 47. A rotating part member (b) including a shaft 41 and a pair of disks 42 and 43 fitted into the shaft is fitted. Since the diameter of the central portion 49 of the shaft is large, the pair of discs 42 and 43 is restricted from moving in the central direction, and is temporarily fixed between both ends of the opening and both side plates. In this state, the fastening of the steel fastening band is performed by joining the butted portions of the main body members (a1) and (a2) and joining the pair of temporarily fixed disks and the shaft according to a conventional method such as welding. Attached tool is completed.

  1 and 5 is symmetrical to the left and right and up and down with respect to a center line L passing through the center point c of the insertion port 12 and perpendicular to the insertion port 12. Designed in shape. Therefore, the number of parts can be reduced by using the main body member (a3) having a shape divided into right and left with reference to the center line L shown in FIG. That is, when the main body member (a3) is turned upside down to form a main body member (a4), and the two members are faced to face each other, they are symmetrical in both the longitudinal direction and the thickness direction. Completely coincide with each other to form the main body (A). Thereafter, a steel fastening band fastening tool can be obtained in the same manner as shown in FIG.

<Tightening method of clamped body>
The tightening of the tightened body using the steel tightening band tightening tool of the above embodiment is performed as follows. First, as shown in FIG. 6 (b), one end (rear end) b1 of the steel fastening band is passed through the band holder 6 and bent downward to be locked to the bottom surface 61 of the band holder. As the steel fastening band, a commercially available steel band can be used. In addition, the band holder has an opening that allows the steel fastening band to be inserted twice, and is strong enough to maintain the fastening force by locking the steel fastening band at the rear end of the bottom surface and the front end of the top surface. As shown in FIG. 6A, a part of the upper surface may be missing in the longitudinal direction, or may have a shape without any defect.

  Next, after the other end (front end) of the steel fastening band is rotated around the body to be fastened (not shown) and then inserted into the band holder 6, the steel fastening band fastening tool 1 (FIG. 6B). Then, it is inserted into the fastening band insertion port 44 of the shaft 41 through the steel fastening band insertion opening 12. Next, the shaft 41 is rotated electrically or manually to wind the fastening band. As the winding progresses, the distance between the steel fastening band insertion port 12 of the fastening tool 1 and the band holder 6 is narrowed, and the two eventually collide. Thereafter, tightening proceeds by further rotating the shaft 41 and winding the tightening band. When the desired tightening state is reached, the rotation of the shaft 41 is stopped, and the steel fastening band is folded back toward the upper surface 62 with the front end 22 of the tool 1 (that is, the front end of the upper surface 62 of the holder 6) as a fulcrum. To fix the tightening of the body to be tightened. Thereafter, the steel fastening band is removed from the tool by rotating the shaft 41 of the steel fastening band fastening tool 1 in the direction opposite to that of winding. The extra steel fastening band may be appropriately cut as necessary, but can be left as it is when the object to be fastened is installed in an attic or invisible place.

  Such a tightening method of the tightened body of the present invention is a method suitable for a construction method in which a metal pipe is connected using a flexible duct in an air conditioning work. In this construction method, two pipes are inserted on both sides of a flexible duct deformed to a desired angle, and tightening is performed according to the above-described tightening method at a desired part on both sides where the pipe and the duct overlap. In this case, since the flexible duct is formed into a shape that can be easily bent, the pipes can be connected to each other at a desired angle. In addition, since the air conditioning pipe is often installed in an invisible place, in such a case, an extra steel fastening band that is not necessary for fastening can be left as it is. After the completion of tightening, a screw is usually applied from above the steel tightening band to prevent the band from coming off. Any flexible duct may be used as long as it is generally used for air conditioning work. Examples thereof include aluminum, glass wool, and synthetic resin.

<Other embodiments>
The preferred embodiment of the present invention has been described above with reference to FIGS. 1 to 6. However, the present invention is not limited to this embodiment, and various modifications can be made unless the effects of the present invention are essentially impaired. Design changes are possible. For example, the main body part (A) does not necessarily have a bilaterally symmetric shape, and the thicknesses of the front end part 11, the side plates 13 and 14 and the back plate 15 constituting the main body part (A) may not be the same. Moreover, a part of the front end part 11 and the back plate 15 may be thicker than each other part.

  As a specific example of such a shape, two members for the main body (A) are overlapped at the front end portion 11 and the back plate 15 to form the main body (A), and the overlapped portion is spotted. The shape which makes a main-body part (A) by joining by welding is mentioned. In this case, the overlapped portion is thicker than the portion where the front end portion 11 and the back plate 15 are not overlapped. If such a manufacturing method is followed, a main-body part (A) can be obtained efficiently compared with the case where it joins by normal welding.

  The steel fastening band fastening tool of the present invention has a simple and small structure and can be manufactured at a low cost. Since the power tool can be used, the workability is excellent. Suitable for work in unstable places. Further, according to the tightening method of the tightened body of the present invention, the load on the operator is reduced, and the tightened body can be efficiently tightened even at a high place or an unstable place.

1 Steel tightening band tightening tool 2 Body (A)
4 Rotating part (B)
6 Holder 11 Front end 12 Insertion port 13, 14 Side plate 15 Back plate 16, 17 Shaft insertion hole 41 Shaft 42, 43 Disc 44, 44 a Opening 47 Power supply connection 48 Manual tool operation unit

Claims (9)

A front end portion having an insertion port for a steel fastening band, a main body portion (A) including a pair of side plates and a back plate having a shaft insertion hole for passing a shaft of a rotating portion (B) described later;
It has a rotatable rotating part (B) for tightening the tightened part by winding the inserted steel fastening band,
The rotating part (B)
A shaft having at least one opening for inserting a steel fastening band in the center, and inserting each shaft insertion hole of the side plate;
A pair of discs having a diameter larger than the height of the side plate , standing on both sides of the opening of the shaft and inside the pair of side plates of the main body (A) ;
A steel fastening band fastening tool, comprising a power supply connecting portion for rotating the shaft at at least one end of the shaft protruding from the side plate of the main body (A).
  The steel fastening band fastening tool according to claim 1, wherein the periphery of the shaft insertion hole of the side plate is reinforced by a metal ring attached to the outer surface of the side plate.   The steel fastening band fastening tool according to claim 1 or 2, wherein a cross-sectional shape in a longitudinal direction of the front end portion is a tapered shape toward the tip. Shaft, have a large-diameter portion at its center, a steel clamping band for fastening tool according to any one of claims 1 to 3 openings of the shaft is to have a groove shape.
  The steel fastening band fastening tool according to any one of claims 1 to 4, wherein openings of the shaft are provided on both sides of the shaft.   6. The steel tightening band tightening tool according to claim 1, wherein one end of the shaft is a manual tool operating unit for rotating the shaft with a manual tool.   The steel fastening band fastening tool according to any one of claims 1 to 6, wherein the main body (A) is symmetrical in the left-right and up-down directions along its longitudinal direction. One end of the steel fastening band is held by a band holder through which the steel fastening band can be inserted, the steel fastening band is rotated around the fastening portion of the body to be fastened, and the other end is moved forward by the holding tool. In the tightening method of tightening the tightened body by pulling,
Insert the other end of the steel fastening band into the opening for inserting the fastening band of the shaft through the steel fastening band insertion port of the fastening tool for steel fastening band according to any one of claims 1 to 7,
Tightening the tightening part by abutting the tip of the front end of the main body (A) with the holder and winding the tightening band by rotating the shaft of the rotating part (B),
After tightening is completed, the steel fastening band is folded back with the tip of the front end of the main body (A) as a fulcrum.
Next, a method for tightening a body to be tightened, wherein the steel tightening band is removed from the tightening tool by reversing the shaft of the rotating part (B).   The tightening method of the to-be-clamped body of Claim 8 whose to-be-clamped body is a connection part of piping for air conditioning and a flexible duct.

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