JP3181779U - Flare tool - Google Patents

Abstract

A flare tool capable of efficiently and accurately performing flare machining.
A gauge bar having a plurality of holding holes for holding an end of a tube, a yoke body that slides relative to the gauge bar along a direction in which the plurality of holding holes are formed, and a yoke body A conical cone that is held and pressed against an end of a tube to form a flare, wherein the yoke body has a pressing portion that presses against the gauge bar, and the gauge bar Each of the positions corresponding to the holding hole has a plurality of recesses into which the pressing portion fits, and either one of the gauge bar or the yoke body has a guide groove for guiding the slide of the yoke body, and the other is A flare tool characterized in that it has a protrusion that engages with the guide groove.
[Selection] Figure 1

Description

  The present invention relates to a flare tool for forming a flare at a connection end of a tube.

  Conventionally, in air-conditioning and piping work, as a tool for forming a flare for attaching a connection fitting to the connection end of the tube, an inverted conical cone is pressed into the end of the tube held by the gauge bar, and the tube is rotated by rotating the handle. In general, a flare tool for flare machining is used.

  When performing flare machining with the flare tool, first open the gauge bar to the left and right, insert the tube into the hole of the gauge bar that matches the size of the tube to be machined, and align the tip of the tube with the upper surface of the gauge bar. Close the gauge bar. Then, the yoke body of the flare tool is moved over the hole in which the tube is held, and the clamp handle is rotated to fix the yoke body to the gauge bar. Then, by rotating the handle, the cone presses into the end portion of the tube, and a flare can be formed at the tip of the tube.

  Since the flare tool is generally made of steel and is heavy and does not have excellent workability, it may be difficult to accurately align the yoke body with the position where the copper tube is held when working in a narrow place or a dark place. If the flare cone of the yoke body does not contact the center of the gauge bar hole accurately and the deviation is large, the cone-shaped tip of the flare cone will come off the copper tube cylinder and directly contact the mortar-shaped metal surface of the gauge bar hole. There are many cases where expensive parts are made unusable by scratching. Further, if the hole of the gauge bar and the center line of the copper tube in the gauge bar are disengaged, the flare-shaped finish of the copper tube will be poor, resulting in wasted time and material costs due to rework.

  The present invention solves the problem of such a flare tool, and an object thereof is to provide a flare tool capable of performing flare processing efficiently and accurately.

  The present invention has been made to solve the above problems, and the gist of the invention is as follows.

  (1) A gauge bar having a plurality of holding holes for holding the end of the tube, a yoke body that slides relative to the gauge bar along a direction in which the plurality of holding holes are formed, and held by the yoke body And a conical cone that presses against an end of the tube to form a flare, wherein the yoke body has a pressing portion that presses against the gauge bar, and the gauge bar holds the holding Each of the positions corresponding to the hole has a plurality of recesses into which the pressing portion fits, and either one of the gauge bar or the yoke body has a guide groove for guiding the slide of the yoke body, and the other is the A flare tool characterized by having a protrusion that engages with a guide groove.

  (2) In the configuration of (1), the gauge bar includes a guide groove formed along a direction in which the yoke body is slid, and the yoke body includes a guide pin as the protruding portion. To do.

  (3) In the configuration of (2), the gauge bar includes a first bar and a second bar that are opened and closed by a rotating shaft, the first bar has the guide groove, and the guide pin A flare tool which is held by the yoke body, and the second bar moves relative to the first bar to open and close.

  (4) In the configuration of (3), the plurality of recesses are formed at positions corresponding to the holding holes of the first bar.

  (5) The flare tool according to any one of 1 to 4, wherein the pressing member includes a steel ball and a compression spring that urges the steel ball toward the gauge bar.

  ADVANTAGE OF THE INVENTION According to this invention, the flare tool which can perform a flare process efficiently and correctly can be provided.

It is an external view of a flare tool. It is sectional drawing of a flare tool. It is an external view of a flare tool. It is an external view of a gauge bar.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an external view of a flare tool 1 of the present embodiment. FIG. 2 is a cross-sectional view of the flare tool 1. FIG. 2 is a cross section of the gauge bar 8 at a divided position. FIG. 3 is an external view of the flare tool 1 viewed from the front side shown in FIG. FIG. 4 is an external view of the gauge bar 8. The flare tool 1 is a tool for forming a flare for attaching a connection fitting to a connection end of a tube, for example, in air conditioning and piping work.

  The flare tool 1 of the present embodiment includes a yoke body 2, a shaft portion 4, a feed handle 5, a clamp portion 6, a gauge bar 8, a cone 10, and the like.

  The yoke body 2 includes a cone 10 that moves by rotating the feed handle 5 therein. Further, the yoke body 2 has a first holding part 21 and a second holding part 22. The first holding part 21 and the second holding part 22 hold the gauge bar 8 so as to be slidable below the cone 10.

  The second holding part 22 is formed with a guide pin 12 for sliding the yoke body 2 along the gauge in mesh with a guide groove 8c formed in the gauge bar 8 described later. In the present embodiment, two guide pins 12 are arranged upward on the surface of the second holding portion 22 facing the gauge bar 8 in FIG. The two guide pins 12 are arranged along the sliding direction of the yoke body 2 as indicated by broken lines in FIG. Since the two guide pins 12 are guided by guide grooves 8c formed along the longitudinal direction of the gauge bar 8 described later, the yoke body 2 is moved in the longitudinal direction of the gauge bar 8 (the direction in which the plurality of holding holes 8b are arranged). Can be stably slid along.

  As shown in FIG. 3, the second holding portion 22 is formed with a ball plunger portion 14 that is a pressing portion. In FIG. 3, the cross-sectional structure is shown so that the structure of the ball plunger portion 14 can be understood with respect to the portion of the ball plunger portion 14 surrounded by a one-dot chain line. The ball plunger portion 14 is a member for positioning so that the yoke body 2 can be easily aligned with the positions of the holding holes 8b when the yoke body 2 is slid relative to the gauge bar 8. The ball plunger portion 14 includes a steel ball 14a, a compression spring 14b, a case 14c, and the like. The steel ball 14a is biased by the compression spring 14b, and the steel ball 14a presses against the gauge bar 8. The steel ball 14a is pressed by the ring 14d so as not to jump out of the case 14c. As will be described later, on the ball plunger portion 14 side of the gauge bar 8, recesses 8 d are respectively formed at the positions of the holding holes 8 b formed in the gauge bar 8. When the yoke body 2 is slid with respect to the gauge bar 8, the urged steel balls 14a are fitted into the respective recesses 8d, so that the yoke body 2 can be easily aligned with the positions of the holding holes 8b. Can do.

  The first holding portion 21 of the yoke body 2 is formed so as to have a gap between the gauge bar 8 and the side surface on the clamp portion 6 side. As described later, this gap allows one of the gauge bars 8 (movable side bar 82) to be opened with respect to the other (fixed side bar 81). Even if there is a gap between the first holding portion 21 and the gauge bar 8, the guide pin 12 is guided to the guide groove 8 c, so that the yoke body 2 is stable without rattling against the gauge bar 8. Can be slid.

  The shaft portion 4 has a screw formed around it and is screwed to the yoke body 2. A feed handle 5 is disposed on one end side (upper portion in FIGS. 1 and 2) of the shaft portion 4, and a cone 10 is disposed on the other end side (lower portion in FIG. 2) of the shaft portion 4. By turning the feed handle 5, the shaft portion 4 is screwed with respect to the yoke body 2, and the cone 10 can be pushed down or raised with respect to the gauge bar 8 depending on the rotation direction.

  The feed handle 5 is a handle for moving the cone 10 as described above. The shape of the feed handle 5 is not particularly limited as long as it can be rotated. A rotation tool connecting hole into which a bit such as a square or a hexagon is inserted may be formed at the rotation shaft position of the feed handle 5 so that the feed handle 5 can be rotated with a tool such as an electric drill.

  The cone 10 formed below the shaft portion 4 is a member that forms a flare by pushing and expanding the end portion of the tube held by the gauge bar 8 while rotating. The cone 10 has a conical shape. As shown in FIG. 2, the cone 10 is a so-called eccentric cone formed so as to be inclined with respect to the axial direction, although the position of the tip of the cone 10 is always at the position of the rotation center of the shaft portion 4. When the feed handle 5 is rotated, the cone 10 rotates eccentrically and the tube is expanded, so that a flare with less unevenness can be formed.

  In addition, as shown in the cross-sectional view of FIG. 2, the shaft portion 4 may include a clutch mechanism configured by an internal spring or the like. In the clutch mechanism, when the feed handle 5 is rotated to form a flare, the feed handle 5 is idled when the torque for rotating the feed handle 5 reaches a predetermined torque, and the cone 10 is further moved to the tube side. It is a mechanism that prevents it from moving. Thereby, it is possible to prevent the cone 10 from being excessively pressed against the tube and forming an abnormal flare.

  The clamp portion 6 is a member that fixes the yoke body 2 to the gauge bar 8. The clamp part 6 includes a clamp handle 6a and a shaft part 6b rotated by the clamp handle 6a. The shaft portion 6 b is screwed into the yoke body 2. When the clamp handle 6 a is rotated, the shaft portion 6 b is screwed with respect to the yoke body 2, and the tip portion 6 c of the shaft portion 6 b comes into contact with the gauge bar 8. By turning the clamp handle 6a and pressing the tip 6c strongly against the gauge bar 8, the gauge bar 8 is closed and the tube is securely held by the holding hole 8b, and the yoke body 2 can be fixed to the gauge bar 8. . As will be described later, on the side surface of the gauge bar 8 on the clamp portion 6 side, a groove portion 8e is formed at the position of the holding hole 8b for holding the tube of the gauge bar 8. The distal end portion 6c is formed so as to match the shape of the groove portion 8e (in this embodiment, a truncated cone shape), and the clamp handle 6a is rotated to fix the distal end portion 6c so as to fit into the groove portion 8e. The position of the main body 2 can be positioned and fixed at the position of the holding hole 8b of the gauge bar 8.

  The gauge bar 8 holds the tip portion of the tube to be flared. As shown in FIG. 4, the gauge bar 8 is formed with a plurality of holding holes 8b so as to hold tubes of various standards having different diameters. One end of the gauge bar 8 is connected by a ring 8a which is a rotating shaft. The gauge bar 8 is divided into two parts by opening the ring 8a as an axis. The gauge bar 8 of the present embodiment is composed of a fixed side bar 81 that is a first bar and a movable side bar 82 that is a second bar, and the movable side bar 82 rotates the ring 8 a with respect to the yoke body 2. Can be opened as an axis.

  The fixed bar 81 is formed with a guide groove 8c and a plurality of recesses 8d. The guide groove 8 c is formed along the longitudinal direction of the fixed bar 81. As described above, the guide groove 8 c is engaged with the two guide pins 12 arranged at the front and rear of the second holding portion 22 of the yoke body 2, and the relative position of the yoke body 2 along the longitudinal direction of the gauge bar 8 is engaged. A typical slide.

  The plurality of recesses 8d are holes for assisting the positioning of the yoke body 2 when the steel balls 14a of the ball plunger portion 14 are fitted therein. When flare is formed on the tube in the flare tool 1, it is necessary to accurately align the position of the rotation center of the cone (the axis of the shaft portion 4) in the yoke body 2 with the position of the holding hole 8b holding the tube. . Therefore, when the rotation center position of the cone 10 is positioned at the center of the holding hole 8b, the positions of the ball plunger portion 14 and the recess 8d may be set so that the steel ball 14a fits into the recess 8d. In the present embodiment, the recess 8 d is formed at the center position of each holding hole 8 b on the side surface of the fixed bar 81. Therefore, the steel ball 14a of the ball plunger portion 14 may also be disposed on the extended line in the direction perpendicular to the sliding direction from the position of the rotation center of the cone 10 in the second holding portion 22 of the yoke body 2. .

  The movable bar 82 is formed with a plurality of groove portions 8e into which the distal end portion 6b of the clamp portion 6 is fitted. In this embodiment, since the front-end | tip part 6c is truncated cone shape, the groove part 8e is a truncated cone-shaped hole. Each groove 8e is formed at the center position of each holding hole 8b on the side surface of the movable bar 82, similarly to the recess 8d. In the present embodiment, since the yoke body 2 is positioned at the position of each holding hole 8b by the ball plunger portion 14 and each concave portion 8d, the groove portion 8e does not have to be provided on the movable side bar 82 side.

  The above is the configuration of the flare tool 1 of the present embodiment. Next, the operation | movement at the time of forming a flare with the flare tool 1 is demonstrated.

  First, as shown in FIG. 1, the gauge bar 8 is opened with the yoke body 2 being moved toward the ring 8 a, and the gauge bar 8 is closed by fitting the tip of the tube into the holding hole 8 b that matches the diameter of the tube to be processed. In the present embodiment, the fixed bar 81 of the gauge bar 8 is fixed by the guide groove 8 c and the two guide pins 12, so that the movable bar 82 is opened and closed with respect to the fixed bar 81.

  Next, the yoke body 2 is moved to the position of the holding hole 8b holding the tube. For example, as shown in FIG. 2, when the tube is held in the third holding hole 8b from the larger one of the plurality of holding holes 8b, the yoke body 2 is moved to the position of the holding hole 8b. In the present embodiment, if the yoke body 2 is moved to the vicinity of the holding hole 8b by the ball plunger portion 14 and the concave portion 8d, the urged steel ball 14a fits into the concave portion 8d. The center of rotation of the shaft 4 of the main body 2 (the position of the tip of the cone 10) can be aligned with the center of the holding hole 8b. Further, the yoke body 2 can be stably slid with respect to the gauge bar 8 by the guide groove 8 c and the guide pin 12.

  Next, the clamp handle 6a is rotated to push the distal end portion 6c of the clamp portion 6 into the corresponding groove portion 8e so that the gauge bar 8 is firmly closed to hold the tube, and the yoke body 2 is firmly attached to the gauge portion 8. Fix it.

  Next, the feed handle 5 is rotated to press the cone 10 against the tube held in the holding hole 8b, and a flare is formed while the cone 10 is rotated. If the above-described clutch mechanism is provided, the flare is completed when the clutch mechanism operates and torque is no longer transmitted to the cone 10. Thereafter, the feed handle 5 and the clamp handle 6a are rotated in the reverse order, the yoke body 2 is moved toward the ring 8a, the gauge bar 8 is opened, and the tube is removed from the holding hole 8b. .

  According to the flare tool of this embodiment described above, the steel ball 14a being urged is moved by moving the yoke body 2 to the vicinity of the holding hole 8b by the ball plunger portion 14 and the concave portion 8d which are positioning members. The rotation center of the shaft 4 of the yoke body 2 (the position of the tip of the cone 10) can be easily and accurately adjusted to the center of the holding hole 8b. Further, when the yoke body 2 is slid relative to the gauge bar 8 by the guide groove 8c and the guide pin 12, it can be slid stably.

  Therefore, the operation of aligning the yoke body 2 with the position of the holding hole 8b of the gauge bar 8 can be easily performed. Further, since the center position of the shaft portion 4 of the yoke body 2 can be accurately aligned with the center position of the holding hole 8b, flare can be formed accurately with high accuracy. Therefore, the flare tool 1 which can perform flare processing efficiently and correctly by this embodiment can be provided.

  In the present embodiment described above, the ball plunger portion 14 is formed on the side of the yoke body 2 where the guide groove 8c of the gauge bar 8 is formed, and the clamp portion 6 is formed on the opposite side, but this is not restrictive. . That is, the clamp portion 6 is provided on the side where the guide groove 8c is formed, and the side surface on the side where the guide groove 8c is formed is fixed by the tip portion 6c of the clamp portion 6, and the movable side bar of the gauge bar 8 The ball plunger portion 14 may be formed on the 82 side. Even in this case, the yoke body can be stably slid by the guide groove 8c and the guide pin 12, and the positioning can be facilitated by the ball plunger portion 14 and the concave portion 8d. However, in this case, the movable portion side bar 82 is always pressed against the steel ball 14 a of the ball plunger portion 14, and force is also applied when the movable side bar 82 is opened with respect to the fixed side bar 81. Therefore, it is preferable that the ball plunger portion 14 is formed on the fixed side bar 81 side as in the present embodiment.

  In the present embodiment, the guide groove 8c is formed in the gauge bar 8, and the guide pin 12 is formed in the yoke body 2. However, the present invention is not limited to this. For example, a protrusion that protrudes along the longitudinal direction may be formed on the gauge bar 8 side, and a groove that extends along the slide direction in which the protrusion engages may be formed in the second holding portion 22 of the yoke body 2. Even in this case, the yoke body 2 can be stably moved with respect to the gauge bar 8.

  Although the present invention has been described in detail according to particular embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.

DESCRIPTION OF SYMBOLS 1 Flare tool 2 Yoke main body 4 Shaft part 5 Feed handle 6 Clamp part 8 Gauge bar 10 Cone 12 Guide pin 14 Ball plunger part

Claims (5)

A gauge bar having a plurality of holding holes for holding the end of the tube; a yoke body that slides relative to the gauge bar along a direction in which the plurality of holding holes are formed; and A flare tool comprising: a conical cone that presses against an end to form a flare;
The yoke body has a pressing portion that presses against the gauge bar, and the gauge bar includes a plurality of concave portions into which the pressing portion fits in respective positions corresponding to the holding holes,
One of the gauge bar and the yoke body has a guide groove for guiding the slide of the yoke body, and the other has a projecting portion that engages with the guide groove. The gauge bar has the guide groove formed along a direction in which the yoke body slides;
The flare tool according to claim 1, wherein the yoke body includes a guide pin as the protruding portion. The gauge bar includes a first bar and a second bar that are opened and closed by a rotating shaft,
The first bar has the guide groove, and is held by the guide body by the guide pin.
The flare tool according to claim 2, wherein the second bar moves relative to the first bar to open and close.   The flare tool according to claim 3, wherein the plurality of recesses are formed at positions corresponding to the holding holes in the first bar.   The flare tool according to any one of claims 1 to 4, wherein the pressing member includes a steel ball and a compression spring that biases the steel ball toward the gauge bar.