JPH11226675A - Flaring tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flaring tool which is capable of reducing the labor of a worker, achieving the flaring with safety and efficiency, and easily obtaining a product uniform and beautiful in worked surface, and is convenient in carriage. SOLUTION: A body case 10 is provided with a reduction gear 20 to decelerate the rotation of a manual rotary handle, a cone shaft 40 which is rotatable by a reduction gear and slidable in the axial direction, a cone 50 provided on the cone shaft 40 in an inclined manner, a screw guide 55 located on the outer circumference of the cone shaft 40 in which a screw 56 is formed in an inner circumferential surface, a moving part 65 which is engaged with the outer circumferential surface of the cone shaft through a clutch part 61, turned by the rotation in the forward/reverse direction of the cone shaft 40, and disengaged from the cone shaft 40 at the advancing limit position in the forward direction and the retraction limit position in the reverse direction, a spring 80 which is compressed by the advancement of the moving part 65 and presses the cone shaft 40 forward, and a tube end holder 85 provided forward of the cone 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flare tool for expanding the diameter of a pipe end, and more particularly to a manually operated flare tool.

[0002]

2. Description of the Related Art As shown in FIG. 16, a metal tube T used for piping of an air conditioner is subjected to a so-called flare process in which a tube end Ta is expanded by a required amount to form a flare portion Tb.

In the conventional flare machining, a manual flare tool 110 as shown in FIG. 17 is frequently used. This flare tool 110
A cone shaft 111 having a cone 112 rotatably inclined and attached to a tip thereof;
1 is held so as to be able to move forward and backward, and a bifurcated holding portion 115 is provided at the end.
And a tube end holding holder 116 such as an alligator clip having a metal tube holding hole 117 formed on a divided surface. Then, the tube end holding holder 116 is sandwiched between the holding portions 115 of the main body member 114, and a rotating handle, a rotating knob, or the like (a ratchet-type rotating handle in the figure) provided at an end of the cone shaft 111 opposite to the cone 112. By rotating the cone 113, the cone 112 of the cone shaft 111 is rotated and moved forward and backward with respect to the metal tube holding hole 117 of the tube end holding holder 116. A screw 111a is engraved on the outer peripheral surface of the cone shaft 111, and a screw (not shown) screwed to the screw 111a of the cone shaft 111 is engraved on the inner peripheral surface of the main body member 114. The cone shaft 111 can be moved forward and backward. Reference numeral 118 shown is a fastening screw for holding and fixing the tube end holding holder 116 with the main body member 114.

In the flare processing using the manual flare tool 110, first, as shown in FIG. 18, a metal tube T is placed in a metal tube holding hole 117 of the tube end holding holder 116 corresponding to its diameter. Pipe end holding holder 11
6 is closed to clamp the outer peripheral surface of the tube end Ta of the metal tube T. Next, as shown in FIG. 19 and FIG. 20 showing a cross section of the main part, the tube end holding holder 116 is inserted into the holding portion 115 of the main body member 114 so that the tube end Ta faces the cone 112, and The tube end holding holder 116 is fixed to the main body member 114 by turning the tightening screw 118. Subsequently, the cone shaft 111 located in the pipe end extension direction
Is rotated (forward rotation), the cone 112 is rotated forward, and is pressed against the inner surface of the tube end Ta of the metal tube T while moving forward, thereby expanding the diameter of the tube end Ta of the metal tube T. If a ratchet-type rotary handle is used as the rotary handle 113, when an excessive load is applied to the cone 112 after the completion of the expansion of the pipe end Ta, the rotary handle 113 idles and the cone 112 moves forward too much. Can be prevented.

[0005] However, in order to increase the diameter of the pipe end Ta by the flare tool 110, the rotary handle 1
13 must be rotated by a large force, and there is a problem that the operator is very tired. In particular, when a large number of workings must be performed continuously, the fatigue of the worker increases significantly. In addition, since the rotary handle 113 must be rotated with a large force, it is not easy to rotate the rotary handle 113, that is, the cone 112 slowly at a constant speed. There is a tendency to look bad.

Further, in the flare tool 110, the cone shaft 1
As described above, the forward rotation of the cone shaft 111 after the completion of the flare processing is restricted by the idle rotation of the ratchet-type rotary handle 113 for the forward rotation of the pipe end T.
Although variation in the flare diameter and the thickness of the end of the tube is prevented, there is no retraction restriction by idling of the handle 113 for the reverse retraction of the cone shaft 111 performed after the flare processing is completed. If the rotary handle 113 is turned (reversely turned) too much, the screw 111a of the cone shaft 111 or the main body member 114
Of the cone shaft 111 at the position where the cone shaft 111 is retracted.
1 suddenly stops rotating, giving a great impact to the operator, or the flare tool 110 itself may be broken. In addition, since the screw 111a of the cone shaft 111 is exposed, there is a danger of getting entangled when the worker wears a work glove to perform work.

Further, the flare tool 110 is divided into a main body member 114 and a tube end holding holder 116, and the tube end holding holder 116 is large and bulky, so that it is inconvenient to carry and has a problem that it is difficult to handle.
In particular, when the tube end Ta is fixed to and removed from the tube end holding holder 116, complicated work such as the tightening and loosening of the tightening screw 118 is required as described above, and there is a problem that the working efficiency is poor.

In recent years, an electric flare tool has been proposed in which the cone shaft is rotated and slid forward and backward by an electric drive device such as an electric motor in order to reduce the labor of the operator. In addition, the electric motor is difficult to handle, and charging of the electric motor or connection to a power supply is indispensable. If it is not possible to use up the charge or connect to the power supply, the work may not be performed.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and it is possible to reduce the labor of an operator, perform flaring with safety and work efficiency, and easily form a uniform and clean surface. It is intended to provide a flare tool that can obtain a simple product and is easy to carry.

[0010]

According to a first aspect of the present invention, there is provided a flare tool, comprising: a speed reducer provided with an attachment / detachment portion of a manual rotary handle to reduce the rotation of the rotary handle; A cone shaft that is slidable in the same direction, a cone that is provided at the tip of the cone shaft, and a cylindrical screw guide that is located on the outer periphery of the cone shaft and has a thread engraved on the inner peripheral surface. When,
The screw guide is screwed with the screw on the inner peripheral surface thereof so that it can be moved forward and backward by rotation, and is engaged with the outer peripheral surface of the cone shaft inserted through the center via a clutch portion, so that the correctness of the cone shaft is maintained. A moving part that rotates by reversing and reversing, moves forward and backward, and is disengaged from the cone shaft at the forward limit position during forward rotation and the retreat limit position during reverse rotation, and between the moving part and the cone shaft. The main body case is provided with a spring that is provided and is compressed by the forward movement of the moving portion to press the cone shaft forward, and a tube end holding holder provided in front of the cone.

In the flare tool according to the second aspect of the present invention, the clutch portion according to the first aspect is cylindrical and has a cone shaft engaging hole at the center, and the front outer diameter is smaller than the middle and rear outer diameters. And forming a forward rotation engagement notch on the outer peripheral surface of the intermediate portion at a depth reaching the outer peripheral surface position of the front portion, and forming a reverse rotation engagement notch on the rear outer peripheral surface. The moving portion has a screw screwed with the screw on the screw guide inner periphery on the outer peripheral surface of the cylindrical body, has a spring holding portion at the front portion, and has a clutch portion insertion portion at the rear portion, A forward rotation swinging claw that engages with the forward rotation engagement notch when the cone shaft is rotated forward and is disengaged when the cone shaft is rotated in reverse on the peripheral wall of the clutch portion insertion portion, and a reverse rotation engagement when the cone shaft is rotated in reverse. Reverse rotation that engages with the notch and is released during forward rotation A swinging claw provided by being biased by a spring so that each engaging claw portion projects into the clutch portion insertion portion, and a projection projecting from the outer peripheral surface of the peripheral wall of the clutch portion insertion portion to the reverse rotation swinging claw. The tapered peripheral wall of the disengagement portion provided at the retreat limit position and the protrusion of the reversing swinging pawl of the moving portion retracted to the retreat limit position are in contact with each other. It is characterized in that the reverse rotation oscillating claw is pushed away from the reverse rotation engagement notch.

[0013] A flare tool according to a third aspect of the present invention is the holder according to the first or second aspect, wherein the pipe end holding holder is divided into two in the radial direction of the pipe, and an attachment mounting concave portion is formed on the divided surface; An attachment is divided into two parts in the radial direction of the pipe and the end of the pipe is held between the divided surfaces, and the attachment is detachable from an attachment mounting recess of the holder body.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view showing an entire flare tool according to an embodiment of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is an exploded perspective view showing a speed reducer of the flare tool, and FIG. FIG. 5 is a perspective view showing a screw guide and a forward and backward movement device of the flare tool, FIG. 6 is a perspective view showing a clutch portion of the forward and backward movement device, and FIG. 8 is a sectional view taken along line 8-8 in FIG. 5, FIG.
FIG. 10 is a perspective view showing a forward rotation rocking claw of the forward and backward movement device.
FIG. 11 is a perspective view showing a reversing swinging pawl of the forward and backward device, and FIG.
Fig. 12 is a front view showing a tube end holding holder of the flare tool, Fig. 12 is a front view showing a state where the metal tube is held by the tube end holding holder, and Fig. 13 is a schematic sectional view showing an operation state of the flare tool. 14 is a cross-sectional view showing the state of the forward rotation oscillating claw and the clutch section during operation, and FIG. 15 is a cross-sectional view showing the state of the reverse rotation oscillating claw and the clutch section during operation.

As shown in FIGS. 1 and 2, a flare tool F according to an embodiment of the present invention is combined with a manual rotary handle (including a rotary knob) H to rotate the rotary handle H. The main body case 10 includes a speed reducer 20, a cone shaft 40, a cone 50, a screw guide 55, a forward / backward retractor 60, and a spring 80.
And a tube end holding holder 85.

The main body case 10 serves as a holding portion for the flare tool F, and is a portion for holding various members therein, and has a holding portion 11 for a reduction gear, a holding portion 12 for a screw guide, a forward and backward device on its inner surface. Holding portion 13 and a needle bearing holding portion 14 are protrudingly provided.
The speed reducer 20, the screw guide 55, the forward / backward movement device 60, and the cone shaft sliding bearing B1 are detachably held via 1, 12, 13, and 14, respectively.

Then, the main body case 1 in this embodiment
Reference numeral 0 denotes a split type which is divided into a first case (lower case in the figure) 10a and a second case (upper case in the figure) 10b along the longitudinal direction to facilitate assembly of the members. The two cases 10a and 10b are assembled after the respective members are assembled by means of appropriate fixing members (not shown) such as bolts and nuts via a counterbore (not shown) or the like. Further, the main body case 10 in this embodiment is made of a synthetic resin, so that the entire flare tool F is reduced in weight.

Further, in this embodiment, the first
At the front of the case 10a, a fixed-side holder main body 86 of a tube end holding holder 85, which will be described later, is integrally provided. On the other hand, the second case 10b has a width equal to the width of the movable side holder main body 87 of the tube end holding holder 85. It is shorter than one case 10a, and an engagement recess 15 for engaging with the movable-side holder main body 87 is formed on the front outer peripheral surface thereof.

The speed reducer 20 reduces the driving force (torque) generated by the rotation of the manual rotary handle H connected to the flare tool F and transmits the reduced drive force (torque) to the cone shaft 40. Is held by the holding unit 11.

In this embodiment, as shown in FIGS. 2 and 3, the speed reducer 20 includes an internal gear 21 fixed to the main body case 10, a sun gear 22,
A plurality of (three in this embodiment) planetary gears 25, 25, 25 arranged on the outer periphery thereof, and a carrier 27 that engages with the cone shaft 40 are provided. The internal gear 21 is fixed to the main body case 10 via a locking projection 21a so that the internal gear 21 does not rotate with respect to the main body case 10 when the reduction gear 20 is operated by rotation of the rotary handle H. I have. A concave portion 23 for rotatably receiving the engaging portion 44 of the cone shaft 40 is formed at a front portion of the sun gear 22, and a detachable portion 24 for the rotating handle H is formed at a rear portion. 24
The sun gear 22 can be rotated by the connection between the steering wheel H and the steering wheel H. The planetary gear 25 is disposed so as to mesh with the outer peripheral tooth portion of the sun gear 22 and the inner peripheral tooth portion of the internal gear 21, and is axially mounted on the carrier 27 by a fixing pin 28. The rotation rotates the planetary gear 25 and revolves around the outer periphery of the sun gear 22, so that the carrier 27 rotates by the rotation of the planetary gear 25. At the approximate center of the carrier 27, there is formed an insertion hole 29 for inserting the cone shaft 40, and the rear part of the insertion hole 29 has a polygonal cross-sectional shape (substantially square shape in the figure). The engaging portion 30 is provided with the engaging portion 40. Reference numeral 26 denotes a shaft hole of the planetary gear 25, a hole into which the fixing pin 28 is inserted, 27a: a hole into which the fixing pin 28 of the carrier 27 is inserted, and 31: a hole at which the planetary gear 25 comes off from the fixing pin 28. A pin receiving flange 32 for preventing the cone shaft 40
The insertion hole 2 is used to smoothly advance and retract
9, a sleeve provided at the front part, 33 is a bearing arranged between the main body case 10 and the sun gear 22, 34 is a bearing arranged between the carrier 27 and the disengagement portion 77 of the forward and backward movement device 60, and 35 is a main body. This is a bearing arranged between the case 10 and the pin receiving flange 31.

Here, by adjusting the number of teeth of the sun gear 22 and the number of teeth of the planetary gear 25, the rotation handle H
Can be reduced to a desired rotation speed and transmitted to the cone shaft 40. By providing the speed reducer 20 in this manner, the force required to turn the rotary handle H is reduced, so that the labor of the operator can be reduced. Since it can be pressed while rotating, the processed surface can be easily and uniformly finished finely.

The cone shaft 40 is for making the cone 50 rotatable and movable forward and backward. In this embodiment, the large diameter portion 41, the medium diameter portion 42, the small diameter portion 43, and the engagement portion 44
(An engagement portion with the reduction gear 20). The large diameter portion 41 has a cone attachment portion 45 for attaching the cone 50. As shown in the figure, the cone mounting portion 45
Is formed to be inclined (eccentric) by a predetermined angle from the center axis of the lens. As shown in FIG. 4, the small-diameter portion 43 is formed with a flat surface 43f for engaging with a clutch portion 61 of the forward / backward movement device 60 described later.

In this embodiment, the engagement portion 44 with the speed reducer 20 has a polygonal cross section (square shape in the figure) corresponding to the engagement portion 30 of the carrier 27 of the speed reducer 20. The cone shaft 40 is connected to the reduction gear 2
It rotates with the rotation of 0, and can slide back and forth in the axial direction with respect to the speed reducer 20. Needless to say, the means for engaging the cone shaft 40 with the speed reducer 20 is not limited to the above-described one. For example, a key is provided on the rear (cylindrical) outer surface of the cone shaft, and the carrier of the speed reducer 20 is corresponding to the key. A key groove may be provided on the inner surface of the rear part of the insertion hole 29 of the 27 and the key may be engaged with the key groove.

The cone 50 is a portion that is inserted into the inner surface of the end of the metal tube and expands the diameter of the end of the tube. A cone 51 is provided at the tip of a shaft 51, and the shaft 51 is connected to the tip of the cone shaft 40. Of the cone shaft 40, is inclined (eccentric) with respect to the central axis of the cone shaft 40, and is rotatable. In addition, the code | symbol 53 of illustration is cone 50.
The bearing 54 is disposed between the cone portion 51 of the cone shaft 40 and the cone mounting portion 45 of the cone shaft 40.

The screw guide 55 is for allowing a moving portion 65 of a forward / backward movement device 60 described later to be able to move forward and backward, and is located on the outer periphery of the cone shaft 40 and is provided on the screw guide holding portion 12 of the main body case 10. Is held. As can be easily understood from FIG. 5, the screw guide 55 is formed of a cylindrical body, and a screw (female screw) 56 is engraved on the inner peripheral surface thereof.

The forward and backward movement device 60 is for moving the cone shaft 40 forward and backward, and comprises a clutch part 61, a moving part 65, and an engagement releasing part 77.
5 engages with the outer peripheral surface of the cone shaft 40 via the clutch portion 61, rotates by forward / reverse rotation of the cone shaft 40, and advances / retreats, and the forward limit position at the time of normal rotation and the retreat limit at the time of reverse rotation. At this position, the engagement with the cone shaft 40 is released.

As can be understood from FIGS. 2 and 6, the clutch portion 61 has a cylindrical shape, has the cone shaft insertion hole 61o at the center, and has an outer diameter of the front portion 62 of the intermediate portion 6.
3 and the outer diameter of the rear part 64 are smaller than the outer diameter of the front part 62.
At the depth reaching the outer peripheral surface position of the rear part 6.
4 A reverse rotation engagement notch 64a is formed on the outer peripheral surface so as to be opposite to the forward rotation engagement notch 63a (alternately). In addition, in this example, the front part 62, the intermediate part 63, and the rear part 64 are configured separately, but may be integrated. In this embodiment, FIG.
And as shown in FIG. 8, the cone shaft insertion hole 61o
The central holes 63o, 63o,
64o is an engagement hole having a shape corresponding to the portion of the cone shaft small diameter portion 43 having the flat surface 43f, and the engagement between the engagement holes 63o, 64o and the cone shaft small diameter portion 43 causes the clutch portion 61 Are rotated by the rotation of the cone shaft 40. Further, the clutch portion 61 is configured to be able to move forward and backward integrally with the cone shaft 40. That is, the clutch portion 61 is
2 The front end is disposed so as to abut the rear end of the cone shaft middle diameter portion 42, and the rear end of the rear portion 64 is fixed in position by a disengagement prevention member 46 such as an E-ring fitted to the outer periphery of the cone shaft small diameter portion 43. . In the figure, reference numeral 62o denotes a cone shaft insertion hole 61o together with the engagement holes 63o and 64o.
Are the central holes of the front part 61 constituting

2 and 5, the moving portion 65 is formed of a cylindrical body, and has a screw (male screw) 66 which is screwed on the outer peripheral surface thereof with the screw 56 on the inner periphery of the screw guide 55. Are formed, and a spring holding portion 67 and a clutch portion inserting portion 68 are provided at a front portion and a rear portion, respectively. As can be easily understood from FIG. 7 and FIG.
Are formed, and the cone shaft 4 is provided in the openings 69 and 70.
The forward rotation rocking claw engages with the forward rotation engagement notch 63a of the clutch portion 61 at the time of forward rotation of 0, and is disengaged at the time when the moving portion 65 reaches the forward limit position and at the time of reverse rotation of the cone shaft 40. 71 engages with the reverse rotation engagement notch 64a of the clutch portion 61 when the cone shaft 40 rotates in the reverse direction, and is disengaged when the moving portion 65 reaches the retreat limit position and when the cone shaft 40 rotates forward. Swing pawl 7 for reverse rotation
2 are rotatably attached by pins 73 and 74. Further, the rocking pawls 71, 72 are urged by springs 75, 76 such that the respective engaging pawls 71a, 72a protrude into the clutch insertion section 68. In this embodiment, the swinging claws 71 and 72 are mounted so as to be opposite to each other.

In this embodiment, as shown in FIGS. 9 and 10, the forward rotation oscillating claw 71 and the reverse rotation oscillating claw 72 are opposite to the engaging claw portions 71a and 72a (diagonal positions). Projection 7 protruding from the outer peripheral surface of the peripheral wall of the clutch portion insertion portion 68
1b and 72b are provided. Further, an end face of the protruding portion 72b of the reversing swinging pawl 72 is a tapered surface corresponding to an inner surface of a tapered peripheral wall 79 of an engagement releasing portion 77 described later. In the drawing, reference numeral 71c denotes a shaft hole of the forward rotation swinging pawl 71, through which the pin 73 is inserted, and 72c denotes a shaft hole of the reverse rotation swinging pawl 72, through which the pin 74 is inserted. is there.

When the moving portion 65 is retracted to the retreat limit position while rotating in the reverse direction, the engagement releasing portion 77
This is for releasing the engagement between the reverse rotation engagement notch portion 64a and the reverse rotation rocking claw 72, and is fixed to the main body case 10 at the retreat limit position of the moving portion 65. The disengagement portion 77 is centered on the carrier 27 of the speed reduction device 20.
An insertion hole 78 for inserting the front portion is formed, and a tapered peripheral wall 79 that comes into contact with the protrusion 72 b of the reversing swinging pawl 72 of the moving portion 65 that has retreated to the retreat limit position at the periphery.
Is provided in a state opened forward.

The spring 80 is compressed by the movement of the moving section 65 and presses the cone shaft 40 forward, and is provided between the moving section 65 and the cone shaft 40. In this embodiment, the spring 80 is externally fitted to the middle diameter portion 42 of the cone shaft 40, and is disposed between the spring holding portion 67 of the moving portion 65 and the large diameter portion 41 of the cone shaft 40 via washers 81 and 82. Attached to.

The tube end holding holder 85 is for holding a metal tube at the time of flaring, and is configured to hold an outer peripheral surface of the tube end of the metal tube and hold the tube end toward the cone 50. It is provided integrally with the front part of the main body case 10. The tube end holding holder 85 in this embodiment is
As can be understood from FIGS. 2 and 11, the pipe is divided into two parts in the radial direction,
Attachment 1 for holding a tube end between holder main bodies 86, 87 formed with 8, 89, and semicircular concave surfaces 102, 103 divided into two in the radial direction of the tube and formed on the divided surfaces.
00, 101, and the attachment 100,
101 is detachable from the attachment mounting recesses 88 and 89. Attachments 100 and 101 are such that the cone 50 side ends of the semicircular concave surfaces 102 and 103 are tapered surfaces 107 according to the required flared surface of the tube end.
It has become. Thus, the attachments 100, 10
If 1 becomes detachable, even when flaring a metal pipe having a plurality of different diameters, if a plurality of attachments corresponding to each diameter of the metal pipe are prepared in advance, it is possible to easily and quickly cope with the problem. Work efficiency is dramatically improved. Further, as shown in FIG.
Locking projections 104 and 105 and locking recesses 90 and 91 that engage with each other are provided on the side surface of the attachment 101 and the side surfaces of the attachment mounting recesses 88 and 89, respectively.
It is preferable to prevent the attachments 100, 101 from dropping out of the attachment mounting recesses 88, 89 to the front of the tube end holding holder after the mounting of 01. Further, a concave groove 92 is formed in a front portion (front side) of the bottom surface of the mounting concave portion 88, 89.
93 is provided, and a tip of a driver or the like, a coin, or the like is inserted into the concave grooves 92, 93 to attach the attachments 100, 101.
May be removed. The holder body 8
In the case where 6, 87 are made of a material having lower strength than the attachments 100, 101 (for example, when the holder main bodies 86, 87 are made of synthetic resin and the attachments 100, 101 are made of metal as in this embodiment). The surface of the attachment mounting recesses 88, 89 may be formed of an insert member I such as a metal plate made of a material having high strength (see FIG. 2).

In this embodiment, the fixed side holder main body 86 of the holder main bodies 86, 87 is formed integrally with the first case 10a of the main body case 10, and the fixed side main body 86 is divided. One end of the movable-side holder body 87 is rotatably held at one end of the surface by a pin P1, and the other end (free end) of the movable-side holder body 87 is fixed to the fixed-side holder body 86 via a clamp mechanism. . That is, the fixed-side holder body 86
A clamp claw portion 94 is attached to a lower portion of the free end of the movable holder via a screw portion 94b and a spring (not shown) so as to be adjustable in height. 95 is rotatably attached by a pin P2, and two parallel arms 96 having a locking pin P3 that is hooked on the clamp claw 94 at a corner of the clamp lever 95 are turned by a pin P4 or the like. It is movably mounted.

Further, the tube end holding holder 85 in this embodiment is provided with a tube end positioning means 97. The positioning means 97 is rotatably held by the fixed holder body 86 together with the movable holder body by the pin P1. The positioning means 97 is shaped so as to cover a region smaller than half of the openings of the attachments 100 and 101 in the closed state and not cover the center of the openings. Thereby, when the metal tube is arranged, the tube end is located at the rear of the cone 50 behind the positioning means 97.
Side is prevented from entering to the side, and the pipe end is positioned.
7 is advanced toward the pipe end while being pushed up, so that the expansion of the pipe end by the cone 50 is not hindered.

FIG. 12 shows an example in which the flare tool F having the above structure is operated to expand the diameter of the pipe end (flare processing).
This will be described with reference to FIG. First, FIG.
As shown in the figure, a holder body 86 of the pipe end holding holder 85,
With the 87 open, the tube end Ta faces the cone 50,
Attachment 1 attached to fixed-side holder body 86
The metal tube T is arranged on the semicircular concave surface 102 of the "00". At this time, the tube end Ta is brought into contact with the positioning means 97. Next, as shown in FIG. 12B, the holder main bodies 86 and 87 are closed, and the holder main bodies 86 and 87 are clamped and fixed by the clamp mechanism. As a result, as shown in FIG.
The outer peripheral surface is sandwiched between the semicircular concave surfaces 102, 103 of the attachments 100, 101.

Next, the rotary handle H inserted and connected to the attachment / detachment portion 24 of the sun gear 22 of the speed reducer 20 is rotated forward (in this example, clockwise) to rotate the cone shaft 40 through the speed reducer 20. Is rotated forward at an appropriate rotation speed. The forward rotation of the cone shaft 40 causes the intermediate portion 63 and the rear portion 64 of the clutch portion 61 that engages with the small-diameter portion 43 of the cone shaft 40 to rotate forward, and as shown in FIG. The forward engaging notch 63a of the forward section 61 and the engaging pawl 71a of the forward pivoting pawl 71 of the moving section 65 are engaged to rotate the forward moving section 65 forward and to screw the moving section 65 forward. When the screw 66 is screwed with the screw 56 of the screw guide 55, the moving section 65 moves forward as shown in FIG. Then, the moving unit 6
5 advances the cone shaft 40 into the spring 8
The cone end 52 of the cone 50 is pushed forward through the clutch shaft 61, and the cone portion 52 of the cone 50 attached to the tip of the cone shaft 40 rotates while rotating the tube end T of the metal tube T.
By pressing the inner surface a, the pipe end Ta is expanded in a conical shape. In addition, at the time of this forward rotation, FIG.
As shown in the figure, the reverse rotation swinging pawl 72 does not engage with the reverse rotation engagement notch 64a of the clutch 61, and the clutch 6
1 slips on the outer periphery of the rear portion 64 and idles. Also, when the cone 50 advances, the positioning means 97 of the tube end holding holder 85 is pushed by the outer surface of the conical portion 52 of the cone 50 and rotates in the opening direction, so that the expansion of the tube end Ta is prevented. Never.

When the expansion of the pipe end Ta is completed, as shown in FIG. 13B, the outer surface of the pipe end Ta comes into contact with the tapered surfaces 107 of the attachments 100 and 101, so that it cannot be further expanded. Therefore, an excessive load acts on the cone 50, and the cone shaft 40 and the clutch portion 61 cannot move forward any more. When the rotation handle H is further rotated forward, the moving section 65 including the swinging claws 71 and 72 rotates together with the cone shaft 40 as shown in FIG. It advances relatively to the cone shaft 40 and the clutch portion 61 to reach the forward limit position X, and as shown in FIG.
Are located (disengaged) from the forward rotation engagement notch 63 a and located on the outer periphery of the front portion 62 of the clutch portion 61, and the cone shaft 40 and the clutch portion 61 idle with respect to the moving portion 65. . Thereby, the moving unit 65
Ceases to rotate, and the forward movement by screwing with the screw guide 55 also stops. Therefore, even if the rotary handle H is further rotated, the compression of the spring 80 does not occur, and the cone shaft 40 that uses the repulsive force of the spring 80 as a forward drive source only idles at that position and does not advance, Since a large load is not applied, it is possible to prevent a failure of the flare tool F due to an overload during normal rotation. Further, since an excessive pressing force by the cone 50 is not applied to the pipe end Ta, it is possible to prevent the thickness and the flare diameter of the pipe end Ta from being varied.

The forward limit position X of the moving portion 65 refers to the position where the forward rotation swinging pawl 71 reaches the front portion 62 of the clutch portion 61, and changes the length of the intermediate portion 63 of the clutch portion 61. Can be adjusted by Also, during the period from when the cone shaft 40 stops moving forward to when the moving unit 65 moves to the forward movement limit position, the reverse rotation swinging pawl 72 is moved.
Moves forward to the front end side of the rear portion 64 while sliding on the outer peripheral surface of the rear portion 64 of the clutch portion 61, and is located on the outer peripheral surface of the rear portion 64 of the clutch portion 61 even when the moving portion 65 reaches the forward limit position X.

The product is taken out after the end of the pipe end Ta has been expanded as follows. First, the rotation handle H is rotated in the reverse direction (in this example, counterclockwise rotation), and the cone shaft 40 and the intermediate portion 63 and the rear portion 64 of the clutch portion 61 are rotated in the reverse direction via the speed reducer 20. At the time of this reverse rotation, as shown in FIG. 15 (B), the engagement notch portion 64a for reverse rotation of the rear portion 64 of the clutch portion 61 and the engagement claw portion 72a of the rocking claw 72 for reverse rotation of the moving portion 65 are provided. The engagement causes the moving portion 65 to rotate in the reverse direction, and the moving portion 65 retreats when its screw 66 is screwed with the screw 56 of the screw guide 55. Then, the moving unit 65
(B), after contacting the front end of the front portion 62 of the clutch portion 61 as shown in FIG.
Further, the clutch 61 and the cone shaft 40 are retracted while being pushed to the side. At the time of this forward rotation, as shown in FIG. 14C, the forward rotation swinging pawl 71 is engaged with the forward rotation engagement notch 63a of the clutch portion 61.
And slips on the outer periphery of the clutch portion 61 and idles.

Thereafter, as shown in FIG. 13A, when the moving section 65 reaches the retreat limit position Y, as shown in FIG.
As shown in the figure, the projection 72b of the reversing swinging pawl 72 contacts (inscribes) the tapered peripheral wall 79 of the disengagement portion 77, and the projection 72b is pushed into the revolving swinging pawl 72. Is separated from the reverse rotation engagement notch 64a. That is, the reverse rotation oscillating claw 72 and the reverse rotation engagement notch 64
The engagement with “a” is released, and the cone shaft 40 and the clutch unit 61 idle with respect to the moving unit 65. Therefore, even if the rotary handle H is turned too much, the screw 56 of the screw guide 55 and the screw 66 of the moving section 65 can be prevented from deteriorating. Rotation stop can be avoided, so that the operator and the flare tool F itself do not have to worry about giving a great impact,
The failure of the flare tool F caused by this can be prevented. The retreat limit position Y can be adjusted by changing the position of the disengagement portion 77 or by changing the inclination of the tapered peripheral wall 79 or the like.

After the cone shaft 40 retreats and idles, the clamp fixing of the tube end holding holder 85 by the clamp mechanism is released, the holder main bodies 86 and 87 are opened, and the product is taken out.

As described above, in the flare processing using the flare tool F, since the manually operated rotary handle H is used, unlike the electric flare tool described in the section of the prior art, it is lightweight and easy to handle, and the work place and the charge Processing can be performed without being affected by cutting or the like. Also, the main body case 10
Since the screw 66 of the moving section 65 is covered by the gloves, even when performing work with gloves or the like, there is no fear that the gloves or the like are involved, and the processing can be performed safely. Further, the metal tube T is attached to the tube end holding holder 8 in the flare tool F.
Since the holder is held by 5, it is not necessary to carry the tube end holding holder separately as in the related art. Further, since the tube end holding holder 85 is opened and closed by the clamp mechanism to fix and remove the tube end Ta of the metal tube T, complicated work such as tightening and loosening of a tightening screw as in the related art is unnecessary. In addition, the working efficiency is dramatically improved, and it is possible to cope with pipes having different diameters by replacing the attachments 100 and 101 of the pipe end holding holder 85.

[0041]

As described above, according to the flare tool of the present invention, since the speed reducer is provided, the cone shaft can be rotated with a small force,
The labor of the operator can be reduced, and a uniform and clean processed surface can be obtained. Also, since the clutch mechanism is provided for the forward and reverse rotation of the cone shaft, the rotation of the cone shaft does not suddenly stop,
It does not give an impact to the flare tool and the operator, prevents the deterioration of the screw for moving the cone shaft forward and backward, and prevents the flare diameter of the processed product and the thickness of the pipe end from varying. . Furthermore, since the screw for moving the cone shaft forward and backward is covered by the main body case, there is no fear that the work gloves or the like will be caught in the work even when gloves or the like are mounted, and the machining can be performed safely. it can. Still further, since the metal tube is held by the tube end holding holder in the flare tool, it is not necessary to carry the tube end holding holder separately as in the related art.

Further, if the attachment for holding the pipe end of the pipe end holding holder is made detachable, even when processing a plurality of metal pipes having different diameters, it is possible to cope with each diameter of the metal pipe in advance. By simply preparing a plurality of attachments and exchanging the attachments, it is possible to respond easily and quickly.

[Brief description of the drawings]

FIG. 1 is a side view showing an entire flare tool according to an embodiment of the present invention.

FIG. 2 is a sectional view thereof.

FIG. 3 is an exploded perspective view showing a speed reducer of the flare tool.

FIG. 4 is a perspective view showing a cone and a cone shaft of the flare tool.

FIG. 5 is a perspective view showing a screw guide and a forward and backward movement device of the flare tool.

FIG. 6 is a perspective view showing a clutch unit of the forward and backward movement device.

FIG. 7 is a sectional view taken along the line 7-7 in FIG. 5;

FIG. 8 is a sectional view taken along line 8-8 in FIG. 5;

FIG. 9 is a perspective view showing a forward rotation rocking claw of the forward and backward movement device.

FIG. 10 is a perspective view showing a reversing swing pawl of the forward and backward movement device.

FIG. 11 is a front view showing a tube end holding holder of the flare tool.

FIG. 12 is a front view showing a state where the metal pipe is held by the pipe end holding holder.

FIG. 13 is a schematic sectional view showing an operating state of the flare tool.

FIG. 14 is a cross-sectional view illustrating a state of a forward rotation swinging claw and a clutch unit during operation.

FIG. 15 is a cross-sectional view illustrating a state of a reversing swinging pawl and a clutch unit during operation.

FIG. 16 is a partial perspective view showing a metal tube before and after flaring.

FIG. 17 is a perspective view showing a conventional general manual flare tool.

FIG. 18 is a perspective view showing a state where the metal tube is held by the tube end holding holder of the flare tool.

FIG. 19 is a perspective view showing a state where the pipe end is expanded using the flare tool.

FIG. 20 is a sectional view of a main part thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body case 20 Reduction gear 24 Detachable part of a manual rotary handle 40 Cone shaft 50 Cone 55 Screw guide 56 Screw of a screw guide 61 Clutch part 62 Front part of a clutch part 63 Middle part of a clutch part 63a Notch part for forward rotation engagement Reference numeral 64: Rear part of the clutch part 64a Notch part for reverse rotation engagement 65 Moving part 66 Screw of the moving part 67 Spring holding part of the moving part 68 Clutch part insertion part of the moving part 71 Forward swinging claw 71a Engagement of the forward swinging claw Mating claw portion 72 Reverse rotation rocking claw 72a Reverse rotation rocking claw engaging claw portion 72b Reverse rotation rocking claw projection 77 Engagement release portion 79 Tapered peripheral wall of engagement release portion 85 Pipe end holding holder 86, 87 Holder body 88, 89 Attachment mounting recess 100, 101 Attachment F Flare tool H Manual rotary hand Retracted limit position of the forward limit position Y moving section of the pipe end X moving section of the Le T metal tube Ta metal tube

Claims (3)

[Claims] 1. A speed reducer provided with a detachable portion of a manual rotary handle to reduce the rotation of the rotary handle, a cone shaft rotated by the speed reducer and slidable in an axial direction, and A cone provided at the tip inclined, a cylindrical screw guide located on the outer periphery of the cone shaft and having a thread engraved on the inner peripheral surface,
The screw guide is screwed with the screw on the inner peripheral surface thereof so that it can be moved forward and backward by rotation, and is engaged with the outer peripheral surface of the cone shaft inserted through the center via a clutch portion, so that the correctness of the cone shaft is maintained. A moving part that rotates by reversing and reversing, moves forward and backward, and is disengaged from the cone shaft at the forward limit position during forward rotation and the retreat limit position during reverse rotation, and between the moving part and the cone shaft. A flare tool comprising: a main body case provided with a spring that is provided and is compressed by the advance of the moving portion to press the cone shaft forward, and a tube end holding holder provided in front of the cone. 2. The clutch portion according to claim 1, wherein the clutch portion has a cylindrical shape and has a cone shaft engagement hole at the center, and the outer diameter of the front portion is smaller than the outer diameters of the intermediate portion and the rear portion. A forward rotation engagement notch is formed on the surface at a depth reaching the outer peripheral surface position of the front portion, and a reverse rotation engagement notch is formed on the rear outer peripheral surface. On the outer peripheral surface of the screw guide has a screw screwed with the screw of the screw guide inner circumference, a front portion has a spring holding portion, and a rear portion has a clutch portion insertion portion,
A forward rotation oscillating claw that engages with the forward rotation engagement notch portion when the cone shaft is rotated forward and is disengaged when the cone shaft is rotated reversely, A reverse rotation oscillating claw which engages with the notch portion and is disengaged at the time of forward rotation, provided by being biased by a spring so that each engagement claw portion projects into the clutch portion insertion portion, and The reverse rotation oscillating claw is formed with a protrusion projecting from the outer peripheral surface of the peripheral wall of the clutch portion insertion portion, the tapered peripheral wall of the engagement release portion provided at the retreat limit position, and the retreat to the retreat limit position. A flare tool characterized in that the projection of the reversing swinging pawl of the moving section comes into contact with the projection and is pushed in so that the reversing swinging pawl is separated from the reversing engagement notch. 3. The holder according to claim 1, wherein the holder is divided into two parts in the radial direction of the tube, and a holder body having an attachment mounting concave portion formed on a divided surface thereof, and is divided into two parts in the radial direction of the tube. A flare tool comprising an attachment for holding a pipe end between the divided surfaces, wherein the attachment is detachable from an attachment mounting recess of a holder body.