JP2002200569A - Flare nut screwing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flare nut screwing tool capable of smoothly and quickly screwing a flare nut to a screw hole of an appliance main body with the manual rectilinear motion. SOLUTION: This flare nut screwing tool is provided with a gear case 11, a rack 12 supported by the gear case 11 and to be moved between a rearward limit R and a forward limit F, a socket gear 13 interlocked with the rack 12, and a socket 14 continuously provided in the socket gear 13 on the same shaft of the socket gear 13 to fit to a hexagonal head part 1b of the flare nut 1. The gear case 11, the socket gear 13 and the socket 14 are respectively formed with a notch 27 to be aligned together with the movement of the rack 12 to the rearward limit R to receive a flare pipe 2. The socket 14 is rotated by the manual rectilinear motion of the rack 12 in relation to the gear case 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flare nut screwing tool used for screwing a flare nut.

[0002]

2. Description of the Related Art As shown in FIG.
Is used, for example, when connecting the flare pipe 2 for transmitting hydraulic pressure to the hydraulic equipment main body 3.
And a hexagonal head 1b connected to the screw shaft 1a. Screw shaft 1
A tapered surface 5a is formed on the end surface of the flare nut 1 through which the flare pipe 2 is inserted. The tapered surface 5a engages with the outer peripheral surface of the flare portion 2a at the end of the flare pipe 2. It has become. On the other hand, the bottom surface of the screw hole 4 of the hydraulic equipment body 3 is formed with a tapered projection 6 in which the inner peripheral surface of the flare portion 2a is in close contact. Is open.

The screw shaft portion 1a of the flare nut 1 is
Then, the tapered surface 5a of the screw shaft portion 1a presses the flare portion 2a of the flare pipe 2 against the tapered projection 6 of the hydraulic equipment main body 3, and the flare pipe 2 is oil-tightly fitted to the oil passage 7. Can be connected. In such a connection, in an actual site, first, an operator takes a picture of the hexagonal head 1b of the flare nut 1 with a finger, screws the screw shaft portion 1a deep into the screw hole 4, and then applies a predetermined tightening torque with a wrench. Flare nut 1 is added.

However, screwing the flare nut 1 into the screw hole 4 with the fingertip of the operator is not efficient.

An automatic tool for screwing a flare nut, which rotates a flare nut with an air motor or an electric motor, is disclosed in, for example, Japanese Patent Application Laid-Open No. 7-52063. However, such an automatic tool has a motor. Large, heavy and difficult to handle.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been described.
An object of the present invention is to provide a flare nut screwing tool that can be screwed quickly and efficiently.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a flare nut screwing tool for screwing a flare nut penetrating through a flare pipe into a screw hole of an apparatus main body. A rack supported by the gear case and capable of linearly moving between the retreat limit and the forward limit, a socket gear interlocking with the rack, and a hexagonal head of the flare nut coaxially connected to the socket gear. The gear case, the socket gear and the socket are provided with notches capable of receiving the flare pipe aligned at the same time at the retreat limit of the rack, and the socket is manually moved linearly with respect to the gear case. The first feature is that it rotates.

According to the first feature, the flare nut can be easily and efficiently screwed into the screw hole of the equipment body by a simple linear movement of the rack relative to the gear case manually, and the flare nut screwing tool does not have a motor. Therefore, it can be handled lightly and lightly.

According to the present invention, in addition to the first feature, the gear case supports a pair of intermediate gears that mesh with the socket gears and interlock the gears with the rack, and at least one of the intermediate gears is always notched. The second feature is that it meshes with the socket gear at a location other than the above.

According to the second feature, the interlocking relationship between the socket gear and the rack can always be maintained strongly regardless of the presence of the notch.

Further, the present invention has a third feature in that, in addition to the first or second feature, retreat limit holding means for holding the rack at the retreat limit is provided between the gear case and the rack.

According to the third feature, the retraction limit of the rack is reliably held, and the flare pipe can be inserted into and removed from the notch accurately.

The retreat limit holding means corresponds to a holding spring 25 and a return spring 33 in an embodiment of the present invention described later.

Further, the present invention relates to a flare nut screwing tool for screwing a flare nut penetrating through a flare pipe into a screw hole of an apparatus body, and comprising a gear case and a rod-shaped member integrally connected to the gear case. A belt case, a slider supported by the belt case and capable of linearly moving between a retreat limit and a forward limit, a socket gear rotatably supported by the gear case, and coaxially connected to the socket gear; A socket to which the hexagonal head of the flare nut can be fitted; and a toothed belt disposed on the belt case while being engaged with the socket gear and connected to the slider.
The gear case, the socket gear and the socket are provided with notches capable of receiving the flare pipe aligned at the same time at the retreat limit of the slider, so that the socket is rotated by the manual linear movement of the slider with respect to the belt case. 4.

According to the fourth feature, the flare nut can be easily screwed into the screw hole of the main body of the apparatus by simply moving the slider manually with respect to the belt case, and the flare nut screwing tool does not have a motor. , Light and easy to handle.

Still further, the present invention is a flare nut screwing tool for screwing a flare nut penetrating through a flare pipe into a screw hole of an apparatus main body, and is provided on a rod-shaped belt case and on one side of the belt case. A nut receiving groove capable of receiving the hexagonal head of the flare nut, a hexagon head disposed in the belt case across the nut receiving groove, connected to the slider via a return spring, and received in the nut receiving groove. A fifth feature is that a belt is wound around the outer peripheral surface of the head, and the belt is operated by manual linear movement of the slider with respect to the belt case.

According to the fifth feature, the flare nut can be easily screwed into the screw hole of the apparatus body by a simple linear movement of the slider with respect to the belt case, and the flare nut screwing tool does not have a motor. It is light and can be handled lightly.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on embodiments of the present invention shown in the accompanying drawings.

FIG. 1 is a plan view of a flare nut screwing tool according to a first embodiment of the present invention, FIG. 2 is an enlarged plan view of a main part of FIG. 1, FIG. 4 is a sectional view taken along line 4-4 in FIG. 2, and FIG. 5 is a sectional view taken along line 5-5 in FIG.
6, FIG. 6 is a sectional view taken along line 6-6 of FIG. 4, FIG. 7 shows a state in which the screwing of the flare nut is completed, FIG. 8 shows a side view corresponding to FIG. 4, and FIG. 9 is a plan view corresponding to FIG. 2, FIG. 9 is a sectional view taken along line 9-9 of FIG. 8, and FIG.
FIG. 11 is a vertical cross-sectional view of a flare nut screwing tool according to a third embodiment of the present invention. FIG. 12 is a vertical cross-sectional plan view of a flare nut screwing tool according to a fourth embodiment of the present invention. 13 is a sectional view taken along line 13-13 of FIG. 12, and FIG. 14 is a sectional view taken along line 14-14 of FIG.

First, a description will be given of a first embodiment of the present invention shown in FIGS.

1 to 3, the flare nut screwing tool T has a gear case 11, a rack 12, a socket gear 13 and a socket 14 as main components.

The gear case 11 has a pair of upper and lower wall plates 16 and 17 having one side end integrally connected to each other by a connecting wall 15.
And a distance member 18 inserted and fixed between the wall plates 16 and 17, and a gear housing 19 (see FIG. 6) for rotatably housing and holding the socket gear 13 is mounted on the distance member 18. It is formed. A guide roller 20 is supported between the wall plates 16 and 17, and a rack 1 is provided between the guide roller 20 and the connecting wall 15.
2 and a rack guide plate 22 joined to the upper surface of the rack 12 are inserted. The rack guide plate 22 is arranged so as to linearly move on the inner surface of the connecting wall 15 in contact with the outer peripheral surface of the guide roller 20, and the rack 12 integrated with the rack guide plate 22 meshes with the socket gear 13. Are arranged as follows. A grip 23 is attached to one end of the rack 12 and the rack guide plate 22, and a stopper member 24 for preventing the rack 12 from coming out of the gear case 11 is provided at the other end. The rack 12 and the rack guide plate 22 have a retreat limit R (FIGS. 1 and 2) for bringing the grip 23 into contact with one end surface of the gear case 11.
(See FIG. 7) and a forward limit F (see FIG. 7) in which the retaining member 24 is brought into contact with the other end surface of the gear case 11.

As shown in FIGS. 3 and 4, between the rack 12 and the grip 23, a holding spring 25 that is partially exposed outside the grip 23 is attached.
When the rack 12 reaches the retreat limit R, the rack 12 can be held in that position by frictionally contacting the inner surface of the gear case 11.

A socket 14 is integrally connected to the lower surface of the socket gear 13 via a connecting shaft 26 penetrating the lower wall plate 17 of the gear case 11, and the socket 14 is fitted with a hexagonal head 1b of the flare nut 1. Are to be combined.

The gear case 11, the socket gear 13,
The connecting shaft 26 and the socket 14 are provided with notches 27, 27,... Reaching from the outer peripheral surface to the center, and these notches 27, 27,. The flare pipe 2 can be received in a line. Notch 27, 27 of socket gear 13
Are formed in a size that does not hinder the engagement between the gear 13 and the rack 12.

Further, a flare guide member 28 for receiving the flare pipe 2 and preventing the flare pipe 2 from falling down is fixed to the upper side wall plate 16 of the gear case 11.

In FIGS. 1 to 7, parts corresponding to those in FIG. 15 are denoted by the same reference numerals, and description thereof is omitted.

Next, the operation of the first embodiment will be described.

In using the flare nut screwing tool T, first, as shown in FIG. 4, the screw shaft portion 1a of the flare nut 1 into which the flare pipe 2 is inserted is slightly screwed into the screw hole 4 of the equipment body 3. Keep it. Next, with the rack 12 held at the retreat limit R, the flare pipe 2 is inserted into the aligned notches 27, 27..., And the flare nut screwing tool T is moved downward along the flare pipe 2, The socket 14 is fitted to the hexagonal head 1b of the flare nut 1. Then, when the gear case 11 is pressed with one hand and the grip 23 is gripped with the other hand to slide the rack 12 toward the forward limit F in FIG. 6, the rack 12 drives the socket gear 13 to rotate, and the flare nut One screw shaft portion 1a can be screwed deeply into the screw hole 4 of the device body 3.

After the screwing, the flare nut screwing tool T is shifted upward to move the socket 14 to the flare nut 1.
Is removed from the hexagonal head 1b, and the rack 12 is returned to the retreat limit R by operating in the direction opposite to the previous one, and the notch 2
.. Are aligned, and the flare pipe 2 is separated from the notches 27, 27.

Thereafter, a predetermined tightening torque is applied to the flare nut 1 with a wrench or the like as in the prior art to complete the connection of the flare pipe 2 to the equipment body 3.

As described above, the flare nut 1 can be easily screwed into the screw hole 4 of the apparatus main body 3 by simply linear movement of the rack 12 with respect to the gear case 11 by hand, and the flare nut screwing tool T has no motor. , Light and easy to handle.

Next, a second embodiment of the present invention shown in FIGS. 8 to 10 will be described.

The flare nut screwing tool T of the second embodiment can always firmly establish the interlocking relationship between the gear 13 and the rack 12 irrespective of the presence of the notches 27, 27. The gear case 11 includes a pair of intermediate gears 29 and 29 'having the same diameter meshing with the socket gear 13, a large-diameter gear 30 meshing with the intermediate gears 29 and 29', and a large-diameter gear 30. And a small-diameter gear 31 that is coaxially integrated with the rack 12 and is rotatably supported. The pair of intermediate gears 29, 29 ′ are arranged at an interval larger than the width of the notches 27, 27... Of the socket gear 13. Therefore, even if the notch 27 of the socket gear 13 is opposed to one of the intermediate gears 29 or 29 'with the rotation of the socket gear 13, the other intermediate gear 29' or 29 is engaged with the socket gear 13. Hold. In addition, since both the intermediate gears 29 and 29 'are always interlocked with the rack 12 via the large diameter and the small diameter 30 and 31, the socket gear 13 can be always driven to rotate from the rack 12 by tension.

In the second embodiment, the socket 14 is formed concentrically in the socket gear 13. Also grip 2
3, a stopper bolt 32 for adjusting the retraction limit R of the rack 12 so as to be adjustable is screwed, and a return spring 33 for urging the rack 12 toward the retraction limit R is provided between the grip 23 and the gear case 11. It will be curtailed.

Since the other construction is basically the same as that of the first embodiment, the same reference numerals are given to the parts corresponding to those of the first embodiment in FIGS. Is omitted.

Next, a third embodiment of the present invention shown in FIG. 11 will be described.

The flare nut screw-in tool T of the third embodiment uses a toothed belt 36 instead of the rack 12 of the first embodiment. That is, a gear case 37 is integrally connected to one end of the rod-shaped belt case 35, and a part of the socket gear 13 rotatably housed and held in the gear case 37 projects into the belt case 35. A socket 14 is formed concentrically in the socket gear 13 as in the second embodiment.

A slider 3 is provided on the outer peripheral surface of the belt case 35.
8 is slidably fitted, and the slider 38 can linearly move between a retreat limit stopper 39 and a forward limit stopper 40 protruding from the outer peripheral surface of the belt case 35.
A plurality of guide rollers 41, 41 are provided in the belt case 35.
Are provided, one end of a toothed belt 36 guided by them and meshing with the socket gear 13 is connected to the slider 38, and the other end is made of a rubber or metal return spring 42.
Through the belt case 35.

In FIG. 11, parts other than those described above are designated by the same reference numerals as those of the first embodiment, and description thereof is omitted.

With the slider 38 placed at the retreat limit R, the flare pipe 2 is inserted into the aligned notches 27, 27,..., And the socket 14 is fitted to the hexagonal head 1b of the flare nut 1. When the belt case 35 is pressed with one hand and the slider 38 is gripped and slid toward the forward limit F with the other hand, the toothed belt 36 moves while the return spring 42 is extended, and the socket gear 13 is moved. Due to the rotational drive, the screw shaft portion 1a of the flare nut 1 can be screwed deeply into the screw hole 4 of the device body 3.

After the screwing, if the socket 14 is detached from the flare nut 1, the slider 38 can be automatically returned to the initial retreat limit R by the tensile force of the return spring 42.

As described above, also in the third embodiment, the flare nut 1 can be easily screwed into the screw hole 4 of the apparatus main body 3 by the manual linear movement of the slider 38 with respect to the belt case 35. Since the screwing tool T also has no motor, it can be lightly handled and lightly handled.

Finally, a fourth embodiment of the present invention shown in FIGS. 13 and 14 will be described.

In the flare nut screwing tool T of the fourth embodiment, an arc-shaped nut receiving groove 47 which is open at one end side surface is formed in the rod-shaped belt case 35, which is the hexagonal head 1 b of the flare nut 1. Can be accepted. In the belt case 35, a plurality of guide rollers 4 are provided.
Are arranged, and these guide rollers 48, 4 are provided.
8 is arranged so as to cross the vicinity of the opening of the nut receiving groove 47, and one end thereof is connected to a slider 38 slidably fitted on the outer peripheral surface of the belt case 35. The other end is connected to the belt case 35 via a return spring 49 made of rubber or metal.

In FIGS. 13 and 14, the same reference numerals are given to components corresponding to those of the first embodiment, and description thereof is omitted.

With the slider 38 held at the retraction limit R, the hexagonal head 1b of the flare nut 1 is
When the belt 46 is pushed into the nut receiving groove 47 of the belt case 35, the belt 46 is wound around the hexagonal head 1b. Then, when the grip is held down with one hand and the slider 38 is gripped with the other hand and slid toward the forward end F, the belt 4 wound around the hexagonal head 1b is moved.
6 drives the socket gear 13 to rotate, and the flare nut 1
Can be screwed deeply into the screw hole 4 of the device body 3.

After the screwing, if the socket 14 is detached from the flare nut 1, the slider 38 can be automatically returned to the initial retreat limit R by the tensile force of the return spring 49 also in this case.

As described above, also in the fourth embodiment, the flare nut 1 can be easily screwed into the screw hole 4 of the equipment main body 3 by the manual linear movement of the slider 38 with respect to the belt case 35. Since the screwing tool T also has no motor, it can be lightly handled and lightly handled.

The present invention is not limited to the above embodiment, and various design changes can be made without departing from the gist of the present invention.

[0051]

As described above, according to the first feature of the present invention, there is provided a flare nut screwing tool for screwing a flare nut penetrating through a flare pipe into a screw hole of an apparatus body, comprising: a gear case; A rack supported by the gear case and capable of linearly moving between a retreat limit and a forward limit, a socket gear interlocking with the rack, and a hexagonal head of a flare nut which is coaxially connected to the socket gear. The gear case, the socket gear and the socket are provided with notches capable of receiving the flare pipe aligned at the same time at the retraction limit of the rack, and rotating the socket by manual linear movement of the rack with respect to the gear case. As a result, the flare nut can be easily screwed into the screw hole of the equipment body by simply moving the rack manually with respect to the gear case. , Moreover flare nut screwing tool is because it does not have a motor, lightly, it is possible to perform the handling lightly.

According to a second feature of the present invention, the gear case supports a pair of intermediate gears that mesh with the socket gears and interlock the gears with the rack, and at least one of these intermediate gears is always a notch. , So that it meshes with the socket gear, regardless of the presence of the notch,
The interlocking relationship between the socket gear and the rack can always be kept strong.

According to a third feature of the present invention, the first
Or, in addition to the second feature, between the gear case and the rack,
Since the retraction limit holding means for holding the rack at the retraction limit is provided, the retraction limit of the rack can be reliably held, and the flare pipe can be inserted into and removed from the notch accurately.

According to a fourth feature of the present invention,
A flare nut screw-in tool for screwing a flare nut penetrating through a flare pipe into a screw hole in the equipment body. The gear case, a rod-shaped belt case integrally connected to the gear case, and supported by the belt case The slider which can be moved linearly between the retreat limit and the forward limit, a socket gear rotatably supported by a gear case, and a coaxially connected serially connected to the socket gear, fits the hexagonal head of a flare nut. And a toothed belt disposed on the belt case while meshing with the socket gear and connected to the slider. The gear case, the socket gear and the socket are aligned at the same time at the retreat limit of the slider. A notch that can receive the flare pipe is provided, and the socket is rotated by the manual linear movement of the slider with respect to the belt case. The flare nut can be easily screwed into the screw hole of the equipment body by simple linear movement of the slider manually with respect to the belt case, and since the flare nut screwing tool does not have a motor, it can be lightly handled. .

According to a fifth feature of the present invention,
A flare nut screw-in tool for screwing a flare nut penetrating through a flare pipe into a screw hole in the main body of the device.
A nut receiving groove for receiving the hexagonal head of the flare nut,
A belt that is disposed in the belt case across the nut receiving groove, is connected to the slider via a return spring, and is wound around the outer peripheral surface of the hexagonal head received in the nut receiving groove. Since the belt is operated by the manual linear movement of the slider, the flare nut can be easily screwed into the screw hole of the equipment body by simple manual linear movement of the slider with respect to the belt case. Since the tool does not have a motor, it is light and can be handled lightly.

[Brief description of the drawings]

FIG. 1 is a plan view of a flare nut screwing tool according to a first embodiment of the present invention.

FIG. 2 is an enlarged plan view of a main part of FIG.

FIG. 3 is an enlarged rear view of a main part of the flare nut screwing tool.

FIG. 4 is a sectional view taken along line 4-4 of FIG. 2;

FIG. 5 is a sectional view taken along line 5-5 of FIG. 4;

FIG. 6 is a sectional view taken along line 6-6 in FIG. 4;

FIG. 7 shows a state in which the screwing of the flare nut is completed.
And a corresponding side view.

FIG. 8 is a plan view corresponding to FIG. 2, showing a second embodiment of the present invention.

FIG. 9 is a sectional view taken along line 9-9 of FIG. 8;

FIG. 10 is a sectional view taken along line 10-10 of FIG. 9;

FIG. 11 is a longitudinal sectional plan view of a flare nut screwing tool according to a third embodiment of the present invention.

FIG. 12 is a sectional view taken along line 13-13 of FIG. 12;

FIG. 13 is a sectional view taken along line 13-13 of FIG. 12;

FIG. 14 is a sectional view taken along line 14-14 of FIG. 12;

FIG. 15 is a sectional view showing a connection structure of a flare pipe to a device main body.

[Explanation of symbols]

 T ····· Flare nut screw-in tool F · · · · · · · · · forward limit R · · · · · · retreat limit 1 · · · · · flare nut 1a · · · · screw shaft 1b · · · · hexagonal head Unit 3 ・ ・ ・ ・ ・ ・ Main body 3 4 ・ ・ ・ ・ ・ ・ Screw hole 11 ・ ・ ・ ・ ・ ・ Gear case 12 ・ ・ ・ ・ ・ ・ Rack 13 ・ ・ ・ ・ ・ ・ Socket gear 14 ・ ・ ・ ・ ・ ・ Socket 25 ・ ・ ・ ・ ・ ・ Retraction limit Holding means (holding spring) 27... Notch 29, 29 ′... Intermediate gear 33... Retraction limit holding means (return spring) 35... Belt case 36. 37: Gear case 38: Slider 46: Belt 47: Nut receiving groove

Claims (5)

[Claims] 1. A flare nut screwing tool for screwing a flare nut (1) penetrating through a flare pipe (2) into a screw hole (4) of an equipment body (3), comprising a gear case (1).
1), a rack (12) supported by the gear case (11) and capable of linearly moving between a retreat limit (R) and a forward limit (F), and a socket gear (13) interlocked with the rack (12). ) And a socket (14) coaxially connected to the socket gear (13) and capable of fitting the hexagonal head (1b) of the flare nut (1).
1) The socket gear (13) and the socket (14) are provided with notches (27) which are aligned at the retreat limit (R) of the rack (12) and can receive the flare pipe (2).
A flare nut screwing tool characterized in that the socket (14) is rotated by manual linear movement of the rack (12) with respect to the gear case (11). 2. The flare nut screwing tool according to claim 1, wherein the gear case has a socket gear.
3) supporting a pair of intermediate gears (29, 29 ') for interlocking the gear (13) with the rack (12) while meshing with the rack (12);
A flare nut screwing tool, characterized in that at least one of these intermediate gears (29, 29 ') always meshes with the socket gear (13) except at the notch (27). 3. The flare nut screwing tool according to claim 1, wherein the gear case (11) and the rack (1).
2) A flare nut screwing tool characterized in that retreat limit holding means (25, 33) for holding the rack (12) at the retreat limit (R) is provided between them. 4. A flare nut screwing tool for screwing a flare nut (1) penetrating through a flare pipe (2) into a screw hole (4) of an equipment body (3), wherein the gear case (3) is provided.
7), a rod-shaped belt case (35) integrally connected to the gear case (37), and the belt case (3).
A slider (38) supported by 5) and capable of linearly moving between a retreat limit (R) and a forward limit (F), and a gear case (3).
7) a socket gear (13) rotatably supported by
A socket (14) coaxially connected to the socket gear (13) and capable of fitting the hexagonal head (1b) of the flare nut (1), and a belt case (35) while meshing with the socket gear (13). ) And a toothed belt (36) connected to the slider (38), the gear case (37), the socket gear (13) and the socket (14).
The slider (38) is provided with a notch (27) capable of receiving the flare pipe (2) aligned at the same time at the retreat limit of the slider (38), and the socket (38) is manually moved linearly with respect to the belt case (35). A flare nut screwing tool characterized in that (14) is rotated. 5. A flare nut screwing tool for screwing a flare nut (1) penetrating through a flare pipe (2) into a screw hole (4) of a device body (3), wherein a rod-shaped belt case (35) is provided. ), A nut receiving groove (47) provided on one side of the belt case (35) and capable of receiving the hexagonal head (1b) of the flare nut (1), and the nut receiving groove (47).
Across the belt case (35),
The hexagonal head (1) is connected to the slider (38) via the return spring (49) and is received in the nut receiving groove (47).
b) a belt (46) wound around the outer peripheral surface, wherein the belt (46) is operated by a manual linear movement of the slider (38) with respect to the belt case (35). Screw-in tool.