JP2018202453A - Tool for tube bending operation - Google Patents

Abstract

To provide a tool for a bending operation capable of bending a tube member such as two kinds of different metal tubes and capable of bending a tube without shifting the tube between right and left hands or inserting the tube with a posture difficult to insert it by always inserting the tube member from an outer side surface direction.SOLUTION: A tool for a bending operation includes: a base part 1 having an insertion hole for fitting a gripping member gripped by a user thereto; and a bending part 2 which is curved to be protruded to the base part 1 and retains a tube member on one end side of the base part 1. Therein, the bending part 2 has a first engagement groove 21 which can be abutted on the tube member and a first support part 22 opposite to the first engagement groove 21, and has a second engagement groove 23 which can be abutted on the tube member and a second support part 24 opposite to the second engagement groove 23, the first engagement groove 21 and the second engagement groove 23 have curve surface states different in curvature radius, and the first support part 22 and the second support part 23 are provided at a predetermined interval in the longitudinal direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tool used when a tubular member such as a metal tube for inserting an electric wire is manually bent to a desired angle.

  In general, when building a building, a tubular member made of metal and having a tubular shape, through which electric wiring is inserted, is disposed inside the building. At this time, in the construction site, an operation of bending the metal tube to a desired angle is performed according to the situation of the site, and a tool for manually bending is used.

  For example, Patent Document 1 discloses a vendor that includes a curved portion that is attached to the distal end of a pipe and that bends the tube to be bent along its shape, and an engaging portion that hangs the tube above the curve.

Japanese Patent Laid-Open No. 2006-209927

  However, in the vendor described in the prior art document 1, only one type of pipe can be bent, and in order to bend a pipe having a different diameter, it is necessary to prepare a plurality of different types of vendors. There is a problem that the cost is high, the portability when carrying is poor, and the work efficiency is not good due to the trouble of replacing.

  Further, for example, in order to bend two types of pipes having different diameters, even if two types of bending portions and locking portions are provided in one vendor, in order to insert the tubes from the outer surface direction of the bending portions and locking portions, There was a problem that the efficiency of work was not good, for example, it was necessary to change the tube between left and right hands or to insert the tube in a posture that was difficult to insert.

  Therefore, in the present invention, it is possible to bend a tubular member such as two different kinds of metal tubes, and by always inserting the tubular member from the outer surface direction, the tube is changed between the left and right hands or the tube is inserted with a tight posture. It is an object of the present invention to provide a bending work tool that can be bent without sludge.

  [1] That is, in the present invention, a base (1) having an insertion hole (12) for attaching a gripping member B to be gripped by a user, and one base side of the base (1) protrudes from the base (1). A first engagement groove (21) that has a bent portion (2) that holds the tubular member (4) and that can be in contact with the tubular member (4). And the length in the longitudinal direction of the tubular member (4) when the tubular member (4) is held opposite to the first engaging groove (21) than the first engaging groove (21). A first support portion (22) that is short and supports the tubular member (4), a second engagement groove (23) that can contact the tubular member (4), and the second engagement groove (23). The length in the longitudinal direction of the tubular member (4) when opposed to each other and holding the tubular member (4) is longer than the second engaging groove (23). It has a second support portion (24) that is short and supports the tubular member (4), and the first engagement groove (21) and the second engagement groove (23) are on the base (1) side. It has a curved surface shape with different radii of curvature toward the longitudinal direction, and the longitudinal length of the tubular member (4) when the first support portion (22) and the second support portion (24) hold the tubular member (4). A bending work tool characterized by being provided at predetermined intervals in a direction.

  [2] The first support portion (22) and the second support portion (24) are swollen with respect to the first engagement groove (21) and the second engagement groove (23), respectively. The bending work tool according to [1], wherein the bending work tool has a curved shape with different radii.

  [3] The bending work tool according to [1] or [2], further including a female screw (13) on an inner surface on one end side of the base (1).

  [4] And between the first engagement groove (21) and the first support portion (22) and between the second engagement groove (23) and the second support portion (24) and outside The bending work tool according to any one of [1] to [3], wherein each side surface has an opening (31, 32).

  [5] The bending work tool according to any one of [1] to [4], wherein the gripping member (B) is attached to the base portion (1).

  According to the bending work tool of the present invention, it is possible to bend a tubular member such as two different types of metal pipes, and to change the pipe between the left and right hands by always inserting the tubular member from the outer surface direction. It can be bent without inserting a tube with a cramped posture.

It is the perspective view seen from the front side upper part of the tool for bending work in one Example of this invention. It is the perspective view seen from the back side lower side of the tool for bending work in one Example of this invention. It is a front view of the tool for bending work in one Example of this invention. It is AA sectional view taken on the line of the tool for bending work in one Example of this invention. It is a top view of the tool for bending work in one Example of this invention. It is a perspective view which shows the use condition of the tool for bending work in one Example of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a bending work tool according to the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are preferable specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention is intended to limit the invention particularly in the following description. Unless specifically stated, the present invention is not limited to this form.

  In the present application, the up-down direction and the front-rear direction correspond to the up-down direction and the left-right direction in FIG.

  1 to 6 show an embodiment of a bending work tool according to the present invention, and are a perspective view, a front view, a cross-sectional view, a plan view, and a view relating to a state of use thereof.

  As shown in FIGS. 1 to 5, the bending work tool of the present invention has a base 1 having an insertion hole 12 for attaching a gripping member B to be gripped by a user, and is located above and protrudes from the base 1. The bent portion 2 has a shape that curves as described above, and holds the tubular member 4 such as a metal tube to be bent. Then, as shown in FIG. 6, the gripping member B can be attached to the base 1 and the tubular member 4 can be held by the bent portion 2 to manually bend the portion appropriately at a suitable angle.

  The base 1 is a member for attaching a gripping member B gripped by a user, is a basic part of a bending work tool, and has a substantially cylindrical shape. And the penetration hole 12 for penetrating the holding member B from the lower side which is the other end side of the base 1 is formed, and the holding member B can be inserted into the insertion hole 12. Further, a female screw 13 is screwed on the inner surface of the base 1 which is the back of the insertion hole, and is detachable by screwing with a male screw provided on one end side of the gripping portion. By having a structure in which the base 1 and the gripping member B are detachable, the bending work tool can be stored without being bulky, and the gripping member B can also be used for other folding work tools. Therefore, the number of gripping members B to be used can be reduced. In this embodiment, a female screw 13 is screwed on the inner surface of the base 1. However, in other embodiments, a male screw can be used, and one end of the gripping member B can be detachable as a female screw. In addition, the base 1 and the gripping member B can be made detachable by a method such as providing a protrusion on the inner surface of the base 1 and providing an engaging portion that engages with the protrusion on one end of the gripping member B. Furthermore, the gripping member B can be fixed and detachable by inserting a bolt from the outside of the base 1. As shown in FIGS. 1 and 2, a hole can be formed on the side surface of the base 1 as a stealer for weight reduction. And as shown in FIG. 6, the tool for bending work which concerns on this invention can be distribute | circulated in the state by which the holding member B was previously attached to the base 1. As shown in FIG.

  The bending portion 2 includes a first engagement groove 21 that can be in contact with a tubular member 4 such as a metal tube to be bent, and the tubular member 4 that faces the first engagement groove 21 and holds the tubular member 4. 3 is shorter than the first engagement groove 21 and has a first support portion 22 that supports the tubular member 4. The first engagement groove 21 is a member that supports the tubular member 4 from below, and has a curved shape that is recessed toward the lower base 1 as shown in FIG. The first support portion 22 is a member that supports the tubular member 4 from above, and has a curved shape that is recessed toward the side opposite to the lower base portion 1. As shown in FIG. 6, the tubular member 4 is supported by the first engagement groove 21 and the first support portion 22, and a place where the user grips is a power point, and a place where the user contacts the first engagement groove 21 is a fulcrum. The tubular member 4 can be bent to a desired angle according to the lever principle with the point of contact with the first support portion 22 as an action point. In the present embodiment, the first engagement groove 21 is curved so as to be compatible with a metal tube having a diameter of 19 mm. However, in other embodiments, the first engagement groove 21 is different as long as the curvature is different from that of the second engagement groove 23. Can be curved to fit with any metal tube.

  And the bending part 2 opposes the 2nd engagement groove | channel 23 which can contact | abut the tubular member 4, and the 2nd engagement groove | channel 23, The longitudinal direction of the tubular member 4 when the tubular member 4 is hold | maintained, ie, figure 3 has a length in the left-right direction shorter than the second engagement groove 23, and has a second support portion 24 that supports the tubular member 4. The second engagement groove 23 is a member that supports the tubular member 4 from below, and has a curved surface that is recessed toward the lower base 1 side, as shown in FIG. The second support portion 24 is a member that supports the tubular member 4 from above, and has a curved shape that is recessed toward the side opposite to the lower base portion 1. As in FIG. 6, the tubular member 4 is supported by the second engagement groove 23 and the second support portion 24, and a place where the user grips is a power point, and a place where the user makes contact with the second engagement groove 23 is a fulcrum, The tubular member 4 can be bent to a desired angle according to the lever principle with the point of contact with the second support portion 24 as an action point. In the present embodiment, the second engagement groove 23 is curved so as to be fitted to a metal tube having a diameter of 25 mm. However, in the other embodiments, the second engagement groove 23 is different as long as the curvature is different from that of the first engagement groove 21. Can be curved to fit with any metal tube.

  And the 1st engagement groove | channel 21 and the 2nd engagement groove | channel 23 are dented toward the base 1 side, and are each curved-surface shape from which a curvature radius differs. As shown in FIG. 4, the radius of curvature of the first engagement groove 21 is relatively small, and the radius of curvature of the second engagement groove 23 is relatively large. With this configuration, for example, two different types of tubular members 4 having a diameter of 19 mm, 25 mm, and the like can be processed with a single bending work tool. Since it is not necessary to replace the work tool, work efficiency can be improved. Moreover, as shown in FIG. 5, the 1st engagement groove | channel 21 and the 2nd engagement groove | channel 23 are arranged in parallel substantially parallel.

  Further, the first engagement groove 21 and the second engagement groove 23 protrude from the base 1 side when viewed from the outer surface side, that is, from the front side to the back side or from the back side to the front side in FIG. Thus, it has a constant radius of curvature and is formed in a curved shape covering the upper end side of the base portion 1 in the longitudinal direction of the tubular member 4 when the tubular member 4 is held, that is, in the left-right direction in FIG. The length of the second engagement groove 23 is longer than that of the first engagement groove 21.

  And the 1st support part 22 and the 2nd support part 24 are provided in the longitudinal direction of the tubular member 4 when the tubular member 4 is hold | maintained, ie, the left-right direction in FIG. The base ends of the first support portion 22 and the second support portion 24 are respectively erected from the boundary of the end portion on the center side between the first engagement groove 21 and the second engagement groove 23, respectively. It is curved so as to cover the engaging groove 21 and the second engaging groove 23. Since the first support portion 22 and the second support portion 24 are not adjacent to each other but are provided at a predetermined interval in the left-right direction in FIG. 3, as shown in FIG. 6, a tubular tube that is a 19 mm metal tube The member 4 can be inserted and bent between the first engagement groove 21 and the first support portion 22 through the opening 3 described later from the outside, and is reversed by 180 ° in the front-rear direction to 25 mm. Similarly, if the user is right-handed, the user can insert and bend the metal tube between the second engagement groove 23 and the second support portion 24 through the opening 3 described later from the outside. Since the metal tube can always be inserted from the outside, workability can be improved. If the user is left-handed, the metal tube can always be inserted from the outside by changing the arrangement of the first support portion 22 and the second support portion 24 in the reverse direction. Workability can be improved.

  And the 1st support part 22 and the 2nd support part 24 are the curved shapes which each swell with respect to the 1st engagement groove | channel 21 and the 2nd engagement groove | channel 23, respectively, and from which each curvature radius differs. The first support portion 22 is a plate-like member having a curvature radius substantially equal to the curvature radius of the first engagement groove 21 at a portion facing the first engagement groove 21, and the second support portion 24 is a second member Since it is a plate-like member having a curvature radius substantially equal to the curvature radius of the second engagement groove 23 in the portion facing the engagement groove 23, the tubular member 4 having a diameter corresponding to each is stably supported. be able to.

  The first opening 31 is provided between the first engagement groove 21 and the first support portion 22 on the outer surface side, and more specifically, on the outer surface side of the first engagement groove 21. On the outer surface side of the first support portion 22, there is a first opening portion 31 having a space for inserting the predetermined tubular member 4. And it has the 2nd opening part 32 between the 2nd engagement groove 23 and the 2nd support part 24, and the outer surface side, More specifically, the outer surface side of the 2nd engagement groove 23 On the outer surface side of the second support part 24, the second tubular part 4 is inserted into the second opening part 32 having an interval. By providing the opening 3 such as the first opening 31 and the second opening 32, the tubular member 4 can be inserted from the outer surface side of the bending work tool. When it is going to bend the middle part, such as an intermediate position of a pipe, it becomes easy to install in the tool for bending work.

  The connecting portion 5 is a member that connects the base 1 and the bent portion 2, and is erected as a plate-like member from the side of the base 1 and fixed to the lower surface of the bent portion 2, so that the base 1 and the bent portion 2 are bent. Part 2 is connected. In this embodiment, the base 1, the bent part 2, and the connecting part 5 are integrally formed. Moreover, in this embodiment, although the connection part 5 is provided as a member connected with the base 1 and the bending part 2, in other embodiment, the connection part 5 is not provided but the base 1 and the bending part 2 are provided. Can also be formed in one piece.

  The material of the base 1, the bent portion 2, and the connecting portion 5 may be a material such as metal in order to withstand the force generated at the contact point with the tubular member 4 when the tubular member 4 such as a metal tube is bent. Preferably, iron, steel, cast iron, hard aluminum, stainless steel and the like are preferable.

DESCRIPTION OF SYMBOLS 1 ... Base 12 ... Insertion hole 13 ... Female screw 2 ... Bending part 21 ... 1st engagement groove 22 ... 1st support part 23 ... 2nd engagement groove 24 ... 2nd support part 3 ... Opening part 31 ... 1st opening part 32 ... 2nd opening part 4 ... Tubular member 5 ... Connection part B ... Holding member

Claims (5)

A base having an insertion hole for attaching a gripping member to be gripped by a user;
A curved portion projecting from the base portion on one end side of the base portion, and a bent portion for holding a tubular member;
The bent portion is
A first engagement groove capable of contacting the tubular member;
A first support portion that faces the first engagement groove and has a length in the longitudinal direction of the tubular member when the tubular member is held is shorter than the first engagement groove, and supports the tubular member;
A second engagement groove capable of contacting the tubular member;
Opposite to the second engagement groove, the length in the longitudinal direction of the tubular member when the tubular member is held is shorter than the second engagement groove, and there is a second support portion that supports the tubular member. And
The first engagement groove and the second engagement groove are curved surfaces having different dent radii of curvature toward the base side,
The bending work tool, wherein the first support part and the second support part are provided at a predetermined interval in a longitudinal direction of the tubular member when the tubular member is held. The said 1st support part and said 2nd support part are the curved shapes from which a bulge curvature radius differs with respect to said 1st engagement groove and said 2nd engagement groove, respectively. Bending tool. The bending work tool according to claim 1 or 2, further comprising a female screw on an inner surface on one end side of the base portion. 2. An opening portion is provided between the first engagement groove and the first support portion, between the second engagement groove and the second support portion, and on the outer surface side, respectively. The tool for bending work according to claim 3. The bending work tool according to any one of claims 1 to 4, wherein the gripping member is attached to the base portion.

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