JP2012086263A - Power stop bender and power stop bending method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power stop bender with which pipe is surely bent at a fixed angle in a short time without requiring skill for pipe bending work using a bender.SOLUTION: A stopper having a top surface is provided on the extension line on the opposite side of a locking protrusion 24 of a receiving groove 23 of the working part 21 of an existing bender C which is composed of the receiving groove 23, the longitudinal cross-section of which is a nearly U-shape and nearly horizontal, and a locking protrusion 24 which is provided on an extension line away from the receiving groove 23 in the horizontal direction, and has a downward curved U-groove. The stopper is provided at the other end of a metallic crossarm one end of which is fixed to a support column 22 for supporting the working part 21 of the bender C.

Description

The present invention provides a vendor provided with a stopper that prevents the pipe or pipe from bending more than necessary when bending a pipe or pipe through which an electric wire or the like is inserted in an electrical work or the like, and bending using the vendor. It relates to the construction method.

Conventionally, in electrical work etc., to manually “S” or “bend” a pipe through which an electric wire or the like is inserted, a tool called an existing vendor as shown in FIGS. 9, 10 and 11 is used. is doing. The vendor C is composed of an action portion 21 and a support column 22 made of a long cylinder as a support portion for supporting the action portion 21. The action portion 21 includes a substantially horizontal receiving groove 23 having a substantially U-shaped longitudinal section, and a locking projection 24 provided at a position away from the receiving groove 23 in the lateral direction. The receiving groove 23 is slightly bent downward with one end in the longitudinal direction of the groove curved. Further, the locking protrusion 24 is on an extension line of the receiving groove 23 and has a shape in which a downward curved concave groove is provided. The action portion 21 is formed by being attached to the upper end portion of the column 22.

As shown in FIG. 6, the vendor C is used by inserting the pipe D into the action part 21 between the receiving groove 23 of the action part 21 of the vendor C and the locking projection 24, and placing one part of the pipe D. The operator hooks the upper surface into the downwardly curved concave groove of the locking projection 24, hits the lower surface of the pipe D slightly shifted from this with one end of the groove 23, and the worker holds the upper part of the pipe D extending upward from the action part 21. It is said to bend by holding it with your hand and pulling it down.
Japanese Utility Model Publication No. 2-108515

However, the bending angle of the pipe D by the vendor C is different depending on how the operator pushes down, and skill is required to bend the pipe D to a certain angle. Therefore, it is extremely difficult to bend the pipe D in a “S” shape or a double “S” shape while maintaining a certain angle.

The present invention has been made in view of these points, and in the bending work of the pipe using the vendor, a stopper that prevents the pipe from being bent more than necessary is attached, and the pipe bending work using the vendor is performed. The present invention solves the above-mentioned problems by providing a power stop bender and a power stop bender method that can be bent to a certain angle reliably in a short time without requiring skill.

  The invention of claim 1 comprises a substantially horizontal receiving groove having a substantially U-shaped longitudinal section, and a locking projection having a downwardly curved concave groove provided on an extension line laterally separated from the receiving groove. A stopper having an upper surface is provided on an extension line of the receiving groove on the side opposite to the locking projection of the receiving part of the acting part of the existing vendor, and the stopper is fixed to one end of a support that supports the working part of the vendor. A power stop bender provided at the other end of the power supply.

According to a second aspect of the present invention, the stopper has a pedestal fixed to the other end of the armrest part, a bolt is erected on the upper surface of the pedestal, and the height of the bolt can be adjusted. The power stop bender according to claim 1, wherein the upper surface of the stopper is the top surface.

According to a third aspect of the present invention, in the stopper, a pedestal is fixed to the other end of the armrest portion, a rotatable and fixed disc is provided on the upper portion of the pedestal, and the height is increased along the circumference of the disc. The power stop bender according to claim 1, wherein a plurality of different small columns are erected and the upper surface of the small column having a desired height is used as the upper surface of the stopper by rotating the disk. .

  The power stop bender according to claim 3, wherein each of the small pillars is constituted by a bolt, and each bolt is screwed into a female screw provided on a disk so that the height thereof can be adjusted. It was.

The invention according to claim 5 is the power stop bender according to any one of claims 1, 2, 3 or 4 in a pipe bending operation using a vender comprising a substantially long column and an action part provided on the column. The pipe is inserted from between the receiving groove and the locking projection of the working part of the vendor, the pipe is hooked on the lower surface of the locking protrusion, and the lower surface of the pipe slightly shifted from the location is received on the receiving groove. A power stop bender method is applied in which a part of the pipe that is placed on one end and extends upward from the action part is pushed down until it comes into contact with the upper surface of the stopper to bend the pipe at a certain angle.

The invention of claim 6 repeats the operation of pushing down a part of the pipe extending upward from the action part until it abuts on the upper surface of the stopper, then shifting the position of the pipe by a predetermined length, 6. The power stop bender method according to claim 5, wherein the bending angle of the pipe is constant.

In the invention according to claim 7, a mark is provided in advance at a bent portion of the upper surface of the pipe, a reference point is provided on the upper surface of the action portion of the power stop vendor, and the reference mark of the pipe and the reference point of the power stop vendor are set. In addition, the power stop bender method according to claim 5, wherein the pipe is pushed down.

In the invention according to claim 8, a graduation at a predetermined interval is provided in advance at the bent portion of the upper surface of the pipe, a reference point is provided on the upper surface of the action portion of the power stop vendor, and the scale of the pipe and the power stop vendor are provided. The power stop bender method according to claim 6, wherein the push-down operation is performed by aligning the reference point and shifting the piping.

According to the inventions of claims 1 and 5, since the stopper is mounted on the extension line of the working portion of the bender, when the pipe is bent manually using the power stop bender, the pipe is bent more than necessary. Even if it does, it will contact | abut to the upper surface of a stopper, and since it does not bend any more, piping of a desired fixed bending angle is obtained. As a result, it is possible to perform the work of the piping for bending the S-shaped, mountain-shaped or the like at a certain angle in a short time and reliably. Thereby, even if an operator is not an expert, piping bending work can be performed reliably.

In addition, since this power stop vendor is formed by simply attaching a stopper to an existing vendor, it is highly versatile, can be manufactured at low cost, and is easy to use.

According to the invention of claim 2, the stopper fixes the pedestal to the other end of the armrest part, stands the bolt on the upper surface of the pedestal, makes the height of the bolt adjustable, and the head of the bolt Since the upper surface is the upper surface of the stopper, it is possible to cope with a bending operation of various pipes at a desired angle, and it is convenient and convenient.

According to the invention of claim 3, the stopper fixes the pedestal to the other end of the armrest part, and provides a disk that can be rotated and fixed on the upper part of the pedestal, and the height is increased along the circumference of the disk. Since a plurality of small column bodies having different heights are erected and the upper surface of the small column body having a desired height is set as the upper surface of the stopper by rotating the disk, the desired angle of various pipes is set. It can respond quickly to bending work, and is convenient and convenient.

According to the invention of claim 4, each small column body is composed of a bolt, and each bolt is screwed to a female screw provided on a disk so that its height can be adjusted. It is possible to respond quickly to bending work, and it is convenient and convenient.

According to the invention of claim 6, after pressing down a part of the pipe extending upward from the action part until it contacts the upper surface of the stopper, the operation of shifting the position of the pipe by a certain length is repeated, Since the bending angle of the pipe is constant, even when the pipe is bent greatly, the bending work can be performed more accurately with a uniform curvature in a short time.

According to the invention of claim 7 or 8, the bend portion of the upper surface of the pipe is preliminarily provided with a mark or a graduation at regular intervals, the reference point is provided on the upper surface of the action portion of the power stop bender, and the mark of the pipe is provided. Or, the scale and the reference point of the power stop vendor are matched, and the pipe is pushed down, or the pipe can be bent more accurately and reliably while shifting according to the scale, and the work is highly reliable. Can be done.

A working portion of an existing vendor comprising a substantially horizontal receiving groove having a substantially U-shaped longitudinal section and a locking protrusion having a downwardly curved concave groove provided on an extension line laterally separated from the receiving groove. A stopper having an upper surface is provided on the extension line of the receiving groove opposite to the locking projection, and the stopper is provided at the other end of the arm metal part having one end fixed to a support column that supports the action part of the vendor. .

As a result, when the pipe is bent manually, even if the pipe is bent more than necessary, the pipe contacts the upper surface of the stopper and does not bend any further. can get. As a result, it is possible to perform the work of piping to bend with the S-shaped and mountain-shaped bends in a short time and reliably.

Hereinafter, a power stop vendor according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing a state in which piping is bent using the power stop bender of Embodiment 1 of the present invention. FIG. 2 is a front view of the stopper of the power stop vendor according to the first embodiment of the present invention. FIG. 3 is a plan view of the same. FIG. 4 is a side view of the same.

  This power stop vendor A is formed by attaching a stopper B to an existing vendor C. First, the stopper B will be described. This stopper B is attached to the vendor C by a brace part. As shown in FIGS. 2, 3 and 4, the arm metal part is horizontally long, and two plate bodies 1 each provided with a curved recess 1 a having a shape corresponding to the shape of a support column described later are opposed to each other. It is formed by inserting and sandwiching one end of the left side of one plate 2 between the right sides of these two plates 1. The two plate bodies 1 are each provided with two through holes 1b in the vertical direction on both the left and right sides in advance, and the two plate bodies 2 also have two through holes 2a in the vertical direction on the left side. Is provided.

Bolts 3 are inserted into the through holes 1b and 2a of the plate bodies 1 and 2 from one side, and nuts 4 are screwed onto the leg portions of the bolts 3 protruding from the other side. It is fixed. A pedestal 5 is welded to the upper surface of the plate body 2. The pedestal 5 is provided with a short cylindrical body 7 on a disk-shaped substrate 6, and a rotatable disk 8 is provided on the upper surface of the body 7.

Further, four through-holes 8a penetrating along the circumferential edge of the disc 8 are provided on the disc 8 at intervals of 90 degrees in plan view, and are substantially concentric on the through-holes 8a. A nut 8d is fixed, a bolt 8b is screwed to the nut 8d, and the lower end of each bolt 8b is passed through each through hole 8a. Accordingly, the height of each bolt 8b is adjustable. In addition, a shallow concave portion 8c is provided on the outer peripheral surface of the disk 8 where the through holes 8d are provided. Further, a saddle-shaped arm portion 7a is projected from one side of the body portion 7, and a threaded hole is formed in the vicinity of the tip of the upright portion of the arm portion 7a. A bolt 7b with a sharp point is screwed. And when this bolt 7b is made to fit in each recessed part 8c of the outer peripheral surface of the said disc 8, the disc 8 is fixed.

Subsequently, the vendor C to which the stopper B is attached will be described. This vendor C is an existing one and bends the pipes manually. This vendor C is the one shown in FIGS.

FIG. 5 is a partial front view showing a state in which the stopper B is attached to the existing vendor C according to the first embodiment of the present invention, that is, a state in which the power stop vendor A is formed. As shown in FIG. 5, the stopper B is attached to the support 22 below the action portion 21 of the vendor C by sandwiching the support 22 with two plates 1 and tightening the bolt 3 and the nut 4. Thereby, the power stop vendor A is formed.

Next, the pipe D is bent using the power stop vendor A. First, the pedestal 5 of the stopper B is adjusted. This stopper B has four bolts 8b whose heights can be adjusted. Here, one bolt 8b is turned to the position where the sharp tip of the bolt 7b of the arm portion 7a is located, and the bolt 7b is tightened. Then, the tip is inserted into the recess 8c on the outer peripheral surface of the disk 8 to fix the disk 8. Then, the bolt 8b located on the opposite side is turned to adjust its height. At that time, the bolt 8b on the opposite side of the bolt 8b has a lower height.

Then, as shown in FIG. 6, the pipe D is inserted from the groove below the locking projection 24 of the operating portion 21 of the power stop vendor A, and the pipe D is inserted at the location of the locking projection 24 as shown in FIG. Is fixed with the left hand E of the operator. After that, a part of the pipe D extending upward from the action part 21 is pushed downward (not shown) with the operator's right hand (not shown), and the pipe D is bent. At this time, if the pipe D tries to bend more than necessary, the pipe B comes into contact with the head of the bolt 8b on the extension line of the action portion 21 of the base 5 of the stopper B so as to bend no more. Therefore, as a result, the pipe D is bent at a certain angle.

Further, the height of each bolt 8b of the disk 8 is adjusted to a desired height in advance, and when the pipe D is bent using the power stop bender A, the bolt of the disk 8 depends on the bending angle of the pipe D. 7b is loosened and the disk 8 is rotated to position the bolt 8b of a desired height near the end of the receiving groove 23, and the bolt 7b is inserted into the recess 8c of the disk 8 and tightened to fix the disk 8 Thus, the bending work of the pipe D can be performed. Further, by adjusting the height of the bolt 8b near the end of the receiving groove 23 while the disc 8 is fixed, a pipe having a desired bending angle can be obtained.

FIG. 7A is a front view of a state in which the pipe D is bent “S” by using the power stop vendor A of the first embodiment. FIG. 5B is a front view of a state in which the pipe D is double “S” bent using the power stop vendor A of the first embodiment. As shown in FIG. 7A, in order to bend the pipe “S”, the two white arrow portions (1) and (2) in FIG. 7A are bent at the same angle from opposite sides. However, if this power stop bender A is used, after bending (1), the position of pipe D is shifted and rotated to the same bolt 8b as a stopper at the position (2). If the pipe D is bent until it abuts, the pipe D can be reliably bent at the same angle, and the “S” bending operation can be performed in a short time and reliably.

Further, as shown in FIG. 7B, in order to double “S” bend (mountain bend), the pipe D must be bent at the same angle at all four points (white arrows). After bending at the positions (1) and (2) as shown in (A) of FIG. 7, the position of the pipe D is shifted until it abuts the same bolt 8b of the stopper at the positions (3) and (4). It can be bent at the same angle just by bending. Thus, when this power stop vendor A is used, all the bent portions of these pipes D can be reliably bent at the same angle, and the double “S” bending operation can be performed in a short time and reliably. Furthermore, if the power stop vendor A is used for bending the pipe D 90 degrees, for example, 4.5 degrees 20 times, this bending work can be performed in a short time and reliably. FIG. 8 shows a state in which the pipe D bent in this way is used in an actual switchboard. (A) The part is an “S” bend, (b) the part is a double “S” bend, and (c) the part is a “he” bend.

  In addition, if a mark (not shown) is put in advance on the upper surface of the pipe D to be bent and a reference point 23a is put on the outer surface of the receiving groove 23 of the action portion 21 of the power stop bender A, the pipe is bent. By aligning the mark and the reference point, the pipe can be bent accurately at a desired position. In addition, as shown in FIG. 1, when bending a plurality of times at a constant angle, a plurality of scales are put in the pipe D in advance, and the length from the action portion 21 of the vendor C is set for each constant scale 31 each time the bending is performed. If it bends to the bend, each bending operation will be bent at the same angle, the pipe D can be bent to a desired angle at a uniform bending angle, and the pipe D can be bent to a desired angle in a short time and reliably. Can be bent.

In the first embodiment, only two through holes 2 a are provided on one side of the plate body 2, but a plurality of rows of two through holes are further provided so that the plate body 2 enters the two plate bodies 1. The length can be changed to multiple stages. By doing in this way, the length from the action part 21 of the volt | bolt 8b which receives the piping D can be adjusted now, and it becomes a thing which is more convenient.

In the first embodiment, the bolts 8b of the action portion 21 are provided at intervals of 90 degrees in a plan view. When the lowest bolt 8b is used, the high bolt 8b at the opposite position becomes an obstacle. If the fixing of the highest bolt 8b is released and the bolt 8b is screwed down to keep it low, it does not get in the way and may be removed. Further, the angle at which the bolt 8b is provided may be an angle that is not opposed from the angle at which each bolt is opposed (for example, every 90 degrees), for example, every 180 degrees (triangle) or every 72 degrees (pentagon). In the above embodiment, a bolt is used as a stopper. However, the present invention is not limited to a bolt, and any other column may be used as long as it is a small column that can abut the pipe D on its upper surface.

It is an explanatory side view showing the state where piping is bent using the power stop bender of Example 1 of this invention. It is a front view of the stopper of the power stop vendor of Example 1 of this invention. It is a top view of the stopper of the power stop vendor of Example 1 of this invention. It is a side view of the stopper of the power stop vendor of Example 1 of this invention. It is a partial front view which shows the state which attached the stopper to the existing vendor of Example 1 of this invention, ie, the state which formed the power stop vendor. It is a front view in the state where piping was latched to the action part of the power stop bender of this Example 1. (A) It is a front view of the state which carried out "S" bending of piping using the power stop vendor of this Example 1. FIG. (B) It is a front view of the state which carried out double "S" bending of piping using the power stop vendor of this Example 1. FIG. It is explanatory drawing which shows the state which used the piping bent using the power stop vendor of this Example 1 for an actual switchboard. It is a front view of the conventional vendor. It is an upper part enlarged front view of the conventional vendor. It is an end view of the receiving groove of the action part of the conventional vendor

A Power stop vendor B Stopper C Vendor D Piping E Left hand 1 Plate 2 Plate 3 Bolt 4 Nut 5 Base 6 Substrate 7 Body 7a Arm 8 Disc 8b Bolt 21 Action 22 Strut 23 Receiving groove 23a Reference point 24 Engagement Stop projection 31 Scale

Claims (8)

A working portion of an existing vendor comprising a substantially horizontal receiving groove having a substantially U-shaped longitudinal section and a locking protrusion having a downwardly curved concave groove provided on an extension line laterally separated from the receiving groove. A stopper having an upper surface is provided on the extension line of the receiving groove opposite to the locking projection, and the stopper is provided at the other end of the arm metal part having one end fixed to a support column that supports the action part of the vendor. This is a power stop vendor. The stopper has a pedestal fixed to the other end of the armrest part, a bolt is erected on the upper surface of the pedestal, the height of the bolt can be adjusted, and the upper surface of the head of the bolt is the upper surface of the stopper The power stop vendor according to claim 1, wherein: The stopper has a pedestal fixed to the other end of the armrest portion, a rotatable and fixed disk is provided on the pedestal, and a plurality of small columns having different heights along the circumference of the disk The power stop bender according to claim 1, wherein the upper surface of the small columnar body having a desired height is used as the upper surface of the stopper by standing up and rotating the disk. 4. The power stop bender according to claim 3, wherein each of the small pillars includes a bolt, and each bolt is screwed into a female screw provided on a disk so that the height thereof can be adjusted. In pipe bending work using a vender consisting of a substantially long column and an action part provided on the column,
Using the power stop bender according to any one of claims 1, 2, 3 or 4, a pipe is inserted between the receiving groove of the acting portion of the vendor and the locking projection, and the pipe is connected to the lower surface of the locking protrusion. Hook and place the lower surface of the pipe slightly shifted from the place on one end of the receiving groove, and push down a part of the pipe extending upward from the action part until it contacts the upper surface of the stopper, so that the pipe is at a certain angle. A power stop bender method, characterized by bending it into two. After pushing down a part of the pipe extending upward from the action part until it comes into contact with the upper surface of the stopper, the operation of shifting the position of the pipe and depressing it by a certain length is repeated, and the bending angle of the pipe is constant. The power stop bender method according to claim 5, characterized in that: A bending point on the upper surface of the pipe is provided with a mark in advance, a reference point is provided on the upper surface of the working portion of the power stop vendor, and the pipe is pressed down by combining the mark on the pipe with the reference point of the power stop vendor. The power stop bender method according to claim 5, wherein: In the bent portion of the upper surface of the pipe, a scale at a predetermined interval is provided in advance, a reference point is provided on the upper surface of the action part of the power stop vendor, and the pipe scale and the reference point of the power stop vendor are combined, The power stop bender method according to claim 6, wherein the push-down operation is performed while shifting.

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