JP4287263B2 - Tightening tool - Google Patents

Description

  The present invention relates to a tightening tool for tightening a flare nut, a turnbuckle, and a pipe union.

In general, these tightening tools include one having a socket having an opening at the insertion tip, and for example, one disclosed in Patent Document 1 is known.
Japanese Examined Patent Publication No. 54-559 (first page, FIG. 2)

Patent document 1 is demonstrated based on the following figure.
FIG. 11 is a diagram for explaining the basic configuration of the prior art. A wrench main body 100 is provided with a gear case 101 at the tip, and a plurality of gears 101 are driven by a power drive device in the main body (not shown). A tool provided with a socket 106 in which gears 102, 102, 103, 104, 108 are sequentially meshed, gears 105 are meshed with the gears 102, 102 at the tip, and an opening 109 is formed in a part of the gear 105. It is.

  When tightening the nut, the power generated by the power unit in the main body is transmitted in the order of the gears 104, 103, 108, 102, and the gear 105 at the tip meshed with the gear 102 is rotated, so that the socket 106 is rotated. Tighten the fitted nut (not shown).

  However, the wrench main body 100 of Patent Document 1 requires that the drive source be rotated in reverse since the wrench main body 100 is removed from the nut after the nut is tightened. It is easy to lose and is not easy to use.

  An object of the present invention is to provide a tightening tool that can be smoothly released from a tightening portion without requiring reverse rotation of a drive source after tightening.

According to a first aspect of the present invention, in a tightening nut tightening tool provided in the middle of the member to be tightened, a fitting portion for fitting to the head of the nut and a U-shaped groove for passing the member to be tightened are provided. a socket having integrally a clamping gear has, for fastening together the input gear for transmitting the power from the drive source and meshed with the gear for tightening during fastening nut, a gear shaft which is integral with the input gear during tightening nut It is characterized by comprising a slide groove that can move to the gear side and move to the opposite side when the tightening gear is released, and a spring that separates the input gear from the tightening gear.

  In the invention according to claim 1, the nut is tightened by meshing the input gear with the tightening gear, and when the operator turns on the power unit to transmit the power from the input gear to the tightening gear. Can be performed by tightening the nut.

  On the other hand, the removal of the tightening tool is performed by separating the input gear and the tightening gear by the combined action of the operator's hand and the spring after tightening the nut, and the U-shaped groove and lower side of the tightening gear fitted to the pipe This can be done by matching the opening of the holder groove and pulling the holder in which each gear fits.

The invention according to claim 2 is characterized in that a switch means that operates with respect to the movement of the input gear is provided so that the operation of the drive source can be connected and disconnected .

According to the first aspect, by separating the input gear from the tightening gear, the tightening gear can be rotated, and by allowing the rotation, the tightening gear can be removed from the pipe.
Conventionally, the drive source is reversely rotated to release the tightening tool from the nut. However, in the invention according to claim 1, after the nut is tightened, the drive source can be smoothly released from the nut without requiring reverse rotation. There is an advantage that an easy-to-use tightening tool can be provided.

According to the second aspect of the present invention, the switch means that operates with respect to the movement of the input gear is provided so that the operation of the drive source can be connected and disconnected .
Therefore, it is possible to adjust the meshing between the input gear and the tightening gear, and it is possible to provide an easy-to-use tightening tool that is useful for preventing the gear portions and the nut from being galled.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is an exploded perspective view of a tightening tool according to the present invention. The tightening tool 10 has a driving device main body 11 and a driving shaft 12 fitted in a driving device base 13 and a hole 14, respectively, and gear driving means shown below. 20 is a structural body.

  The gear driving means 20 includes a tightening gear 22 having a U-shaped groove 21, a brake 23 that suppresses idling of the tightening gear 22, and a tightening gear 22 that meshes with the tightening gear 22 and supplies power from a driving source. An input gear 24 for transmitting to the sliding gear, slide grooves 26 and 27 for engaging and pulling the gear shaft 25 integrated with the input gear 24 with the fastening gear 22, and upper and lower portions of the fastening gear 22. Fitting portions 28 and 29 to fit, an upper holder 30 provided with the fitting portion 28, a lower holder 31 provided with the fitting portion 29, and the upper holder 30 and the lower holder 31, respectively. Joined to the slide grooves 32, 33 one by one, the collar 34 that fits into the slide grooves 32, 33 and slides in the same direction as the slide direction of the gear shaft 25, the upper holder 30 and the drive device base 13. The spring 35 and the spring fixing screw 36 acts upon separating the input gear 24 from the tightening gear 22, a structure consisting of a screw 37, 38, 39 and 40 Metropolitan for fixing the upper holder 30 and lower holder 31.

  Reference numeral 15 denotes a hole into which the spring fixing screw 36 is fitted, and reference numeral 16 denotes a hole for accommodating the tip of the spring 35. On the other hand, 51 is a pipe, 52 is a flare nut having a hole through which the pipe 51 passes, 53 is a screw part having a through hole integrally with the flare nut 52, 54 is a base, 55 is a screw hole in which the screw part 53 is fitted, 56 Is a flare processing part.

Furthermore, the switch means 19 which operates with respect to the movement of the input gear 24 is provided so that the operation of the drive source can be connected and disconnected . 17 is a coupler, and 18 is a wiring.
Therefore, when the input gear 24 is meshed with the tightening gear 22 and the flare nut 52 is tightened, the flare nut 52 can be gradually tightened by turning the switch means 19 on and off, and the flare nut 52 is prevented from being galled. it can.

FIG. 2 is a side view of the tightening tool according to the present invention, and shows the parts of FIG. 1 assembled and viewed from the side.
The tightening tool 10 includes a drive device body 11 disposed on a drive device base 13, a gear shaft 25 coupled to the drive shaft 12 and extending downward, an input gear 24 integral with the gear shaft 25, and the input gear. 24 sliding grooves 26, 27, a fastening gear 22 that meshes by moving the input gear 24 integrated with the gear shaft 25 along the sliding grooves 26, 27, and the upper and lower sides of the fastening gear 22 After the fitting portions 28 and 29 into which the portions fit, the collar 34 that slides the slide grooves 32 and 33 in accordance with the movement of the gear shaft 25, and the flare nut 52 (not shown) are tightened, the input gear 24 is tightened. This is a structure comprising a spring 35 and a spring fixing screw 36 that work to separate from the gear 22.

  Reference numeral 23 denotes a brake for preventing idling of the tightening gear 22, 41 denotes a flare nut fitting portion with a flare nut 52 (not shown), and 38 and 40 denote screws for fixing the upper holder 30 and the lower holder 31.

Furthermore, the switch means 19 which operates with respect to the movement of the input gear 24 is provided so that the operation of the drive source can be connected and disconnected . 17 is a coupler, and 18 is a wiring.
Therefore, when the input gear 24 is meshed with the tightening gear 22 and the flare nut 52 is tightened, the flare nut 52 can be gradually tightened by turning the switch means 19 on and off, and the flare nut 52 is prevented from being galled. it can.

3 is a cross-sectional view taken along the line 3-3 in FIG. 2, and the gear driving means 20 has a flare nut fitting portion 41 and a flare nut 52 (not shown) for fitting to a flare nut 52 (not shown). )), A tightening gear 22 having a U-shaped groove 21 for fitting into a pipe 51 (not shown), a brake 23 for suppressing idling of the tightening gear 22, and a flare nut when tightening The input gear 24 that transmits power from the meshing drive source with the tightening gear 22 and the gear shaft 25 integrated with the input gear 24 can be moved to the tightening gear 22 side when the flare nut is tightened. This means comprises a slide groove 27 that can move to the opposite side when the gear 22 is released, and a collar 34 that slides the slide groove 33 in accordance with the movement of the gear shaft 25.
Further, the brake 23 is fixed by a hole 43 and a joint portion 44 of the lower holder 31 and a hole and a joint portion of the upper holder 30 (not shown), and one end is always in contact with the tightening gear 22 (45 is a contact portion). To do.)

  Reference numerals 37, 38, 39, and 40 denote screws for fixing the lower holder 31 and the upper holder 30 (not shown). Reference numeral 42 denotes a lower holder groove.

4 is a cross-sectional view taken along line 4-4 of FIG. 3, and is an enlarged view of the cross section of the tightening gear 22. FIG.
The tightening gear 22 has fitting portions 28 and 29 with the upper holder 30 and the lower holder 31, and a flare nut fitting portion 41 at the center. This flare nut fitting part 41 is a recessed part fitted to a flare nut 52 (see FIG. 1) (not shown).

FIG. 5 is a view for explaining a fixed portion and a moving portion in the tightening tool of the present invention. When a hatched (XX) portion is used as a fixed portion, a white portion becomes a moving portion.
That is, by fixing the hunted portion and moving the white portion horizontally, it can be moved by the slide distance t1, and as a result, the input gear 24 is separated / engaged with the tightening gear 22. Be free. The procedure from separation to meshing will be described in detail below.

  (A) shows the state (before use) in which the tightening gear 22 and the input gear 24 are separated from each other, which is substantially the same as in FIG. Therefore, the description of the reference numerals basically overlapping with FIG. 2 is omitted. Reference numeral 46 denotes an upper holder end portion where one end of the spring 35 is fixed. Reference numeral 47 denotes a main body rear end portion.

Here, the double-hatched tightening gear 22, the upper holder 30, and the lower holder 31 are integrated, and the tightening gear 22 is basically a fixed side only by tightening a flare nut 52 (not shown). .
Therefore, on the contrary, the drive device main body 11, the drive shaft 12, the drive device base 13, the input gear 24, and the collar 34 are integrally movable.

  (B) shows a state (in use) where the tightening gear 22 and the input gear 24 are engaged with each other. Since the reference numerals are the same as those in FIG. Here, the rear end portion of the main body of the driving device main body 11 is denoted by reference numeral 48. The description of the double-hatched portion is the same as in FIG.

When the gear shaft 25 is slid along the slide grooves 26 and 27 and the collar 34 is slid toward the tightening gear 22 along the slide grooves 32 and 33, the tightening gear 22 and the input gear 24 are engaged with each other. The gear 22 tightens the flare nut 52 between the pipe 51 and the joint lower part 53 (not shown). Reference numeral 49 denotes a meshing portion between the tightening gear 22 and the input gear 24.
At this time, the main body rear end 48 is shorter than the main body rear end 47 of FIG. 5A by t1. This t1 is a sliding distance of the gear shaft 25 and the collar 34 to the tightening gear 22 side.

FIG. 6 is an operation diagram from before the tightening tool is used to when the tightening is completed.
(A) shows a state before the fastening gear 22 is fitted into the flare nut 52, and the fastening gear 22 and the input gear 24 of the fastening tool 10 are separated. At this time, the gear shaft 25 is at the right end of the slide groove 27. The brake 23 prevents the tightening gear 22 from slipping. In this state, the operator moves the tightening tool 10 as indicated by arrow D so that the tightening gear 22 and the flare nut 52 are fitted.

  (B) shows a state when the tightening gear 22 is fitted to the flare nut 52, and at this time, the U-shaped groove 21 is fitted to the pipe 51. Further, the gear shaft 25 of the input gear 24 is still at the right end of the slide groove 27. From this state, the gear shaft 25 is slid as shown by an arrow E, which is integrated with the input gear 24 by the operator's hand.

  (C) shows a case where the tightening gear 22 and the input gear 24 are engaged with each other, and the gear shaft 25 is at the left end of the slide groove 27. Reference numeral 49 denotes a meshing portion. In this state, when the input gear 24 is rotated as indicated by the arrow F by the drive device main body 11 (not shown), the tightening gear 22 is rotated as indicated by the arrow G to start tightening the flare nut 52.

(D) shows the time when the tightening of the flare nut is completed.
When the tightening gear 22 is rotated several times to complete the tightening of the flare nut 52 (the direction of the flare nut 52 is changed intentionally to indicate that the tightening has been completed), in most cases, a U-shape. The position of the groove 21 is shifted from that of the lower holder groove 42 (in this case, the positional relationship is substantially perpendicular to the lower holder groove 42).

  As described above, the flare nut 52 is tightened with the operator's hand tightening the gear shaft 25 of the input gear 24 along the slide groove 27 while the tightening gear 22 is fitted to the flare nut 52. It can be easily performed by moving to the gear 22 side, fitting the input gear 24 and the tightening gear 22 and switching on the drive device body 11 (not shown).

  Next, an operation in which the operator moves the input gear 24 integrated with the gear shaft 25 as indicated by an arrow H and removes the tightening tool 10 from the pipe 51 and the flare nut 52 will be described.

FIG. 7 is an operation diagram when the tightening tool is removed from the flare nut and the pipe.
(A) shows the state in which the input gear 24 is pulled away from the tightening gear 22 that has been tightened. The positional relationship between the U-shaped groove 21 and the lower holder groove 42 remains vertical. On the other hand, the gear shaft 25 is at the right end of the slide groove.
Next, the tightening gear 22 is moved as indicated by an arrow J.

  (B) shows a state in which the pipe 51 is in the middle of the U-shaped groove 21 of the tightening gear 22 (at this time, for example, the flare nut fitting portion 41 shown in FIG. 4 is disengaged from the flare nut 52). When the tightening tool 10 is pulled from the state as indicated by the arrow K, the tightening gear 22 starts to rotate as indicated by the arrow L.

  (C) shows a state in which the tightening gear 22 has moved slightly from the state of (b). Further, when the tightening tool 10 is pulled as indicated by an arrow M from this state, the tightening gear 22 rotates as indicated by an arrow N. The rotation of the tightening gear 22 is continued until the opening directions of the U-shaped groove 21 and the lower holder groove 42 coincide.

  (D) advances the rotation of the tightening gear 22 in the state of (c), the openings of the U-shaped groove 21 and the lower holder groove 42 coincide, and the tightening gear 22 is removed from the flare nut 52 and the pipe 51; As a result, the tightening tool 10 is shown separated from the flare nut 52 and the pipe 51.

  As described above, the tightening tool 10 is removed from the flare nut 52 by the combined action of the operator's hand and the spring 35 (not shown) after the flare nut 52 is tightened, and the gear shaft 25 of the input gear 24 is moved into the slide groove. 27 is moved away from the tightening gear 22, and then the flare nut fitting portion 41 (not shown) of the tightening gear 22 is moved upward to be removed from the flare nut 52 and fitted into the pipe 51. The tightening gear 22 is rotated so that the U-shaped groove 21 of the combined tightening gear 22 is in the same direction as the slide groove 27, the openings of the U-shaped groove 21 and the lower holder groove 42 are aligned, and each gear fits. The tightening tool can be removed by pulling the holder.

FIG. 8 is a diagram showing a reference example of FIG. 2. The tightening tool 60 includes a drive shaft 62 that extends downward from the drive device body 61, and gear drive means 63 that transmits the drive force generated by the drive device body 61. It is the structure which consists of.
The gear driving means 63 includes a tightening bevel gear 65 having a flare nut fitting portion 64 for fitting to the flare nut 52 and a U-shaped groove 97 for fitting to the pipe 51 connected to the flare nut 52, and a flare An input bevel gear 66 that transmits power from a meshing drive source to the tightening bevel gear 65 when the nut 52 is tightened, and a pair of upper holes 98 that support the input bevel gear 66 so as to be movable in the vertical direction of the shaft 67 of the gear. The lower hole 99, a spring 68 that urges the input bevel gear 66 in a direction to separate it from the fastening bevel gear 65, a bearing 69 provided between the spring 68 and the input bevel gear 66, and these fastening bevel gears 65 , An input bevel gear 66, a shaft 67, a spring 68, a case 70 for housing a bearing 69, a tightening bevel gear 65 on the case 70, and an input Berugiya 66, shaft 67, spring 68, a plate 71 and screws 72 and 73 Metropolitan used to reliably accommodating the bearing 69.

  In the gear driving means 63, the flare nut fitting portion 64 is slightly covered with the flare nut 52, the input bevel gear 66 is moved downward to mesh with the tightening bevel gear 65, the case handle 75 is held with the left hand 74, the right hand When the switch 77 of the drive device body 61 is turned on at 76, a signal is transmitted from the drive shaft 62 to the input bevel gear 66, and the tightening bevel gear 65 meshed with the input bevel gear 66 is rotated, whereby the flare nut 52 is screwed. 55 can be screwed into.

  In addition, 53 is a thread part which has a through-hole integrally with the flare nut 52, 54 is a base, 56 is a flare process part. As a result, the tightening tool 60 can be used as a handy type flare nut tightening tool composed of relatively few components.

FIG. 9 is a view showing still another reference example of FIG. 2. A tightening tool 80 includes an upper handle 81, a gear shaft 83 attached to the distal end portion 82 of the upper handle 81, and the gear shaft 83. A ratchet gear 84, a ratchet pawl 85 that meshes with the ratchet gear 84, a ratchet pawl fixing shaft 86 that fixes the ratchet pawl 85 to the upper handle 81, an input gear 87 that is integrated with the gear shaft 83, and a flare A tightening gear 88 that meshes with the input gear 87 when tightening the nut 52 (see FIG. 1), a U-shaped groove 89 that fits into the pipe 51 (see FIG. 1), and a flare nut 52 (see FIG. 1). )), A slide groove 91 for sliding the gear shaft 83, a gear shaft 83, an input gear 87, a tightening gear 88, a U-shaped groove 89, and a flare nut fitting portion 90. A lower holder 92 that houses the slide groove 91, a spring 93 provided between the lower holder 92 and the upper handle 81, a spring fixing portion 94 for fixing the spring 93 to the upper handle 81, and a spring 93 It is a structure including a spring fixing portion 95 for fixing to the lower holder 92.

FIG. 10 is a view taken in the direction of the arrow 10 in FIG. 9 to facilitate understanding of the structure when the tightening tool 80 is viewed from above.
The description of each symbol is the same as in FIG.
The tightening action of the flare nut 52 (see FIG. 1) using the tightening tool 80 will be described below.

  When the operator slightly covers the flare nut fitting portion 90 on the flare nut 52 (see FIG. 8) and slides the gear shaft 83 along the slide groove 91 as indicated by the arrow P, the operator integrates with the gear shaft 83. The input gear 87 thus engaged with the tightening gear 88, and then the upper handle 81 is pulled to the lower holder 92 using the spring 93 as shown by the arrow Q, the input gear 87 and the tightening gear 88 are moved. In conjunction with this, the flare nut 52 (not shown) is tightened. Therefore, the flare nut 52 can be screwed into the joint upper part 56 (see FIG. 8).

  As a result, the tightening tool 80 does not require a power unit and can be used as a flare nut tightening tool that moves only by an operator's manual operation.

The tightening tool 10, 60, 80 of the present invention can also be used for tightening general bolts and nuts other than flare nuts.
Further, for example, the material of the tightening gear 22, the input gear 24, and the gear shaft 25 is basically a metal material, but JIS carbon steel for machine structure, chrome molybdenum steel, carbon tool steel, alloy tool steel. Steel is suitable.
On the other hand, for example, when the U-shaped groove 21 portion is joined later to make another material, only the role of sandwiching the pipe 51 is used, and therefore, non-ferrous copper alloy and aluminum alloy are sufficient.

Furthermore, for example, the material of the spring 35 is preferably JIS spring steel.
The other components such as the drive base 13, the upper holder 30, and the lower holder 31 may be made of a metal material or a resin material, but a resin material is more desirable in view of weight reduction.

  The tightening tools 10, 60 and 80 of the present invention are suitable as a tightening tool such as a flare nut, a turnbuckle, and a piping union.

It is a disassembled perspective view of the fastening tool which concerns on this invention. It is a side view of the tightening tool which concerns on this invention. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is a figure explaining the fixing | fixed part and moving part in the clamping tool of this invention. It is an action figure from before use of a tightening tool to the time of completion of tightening. It is an effect | action figure at the time of removing a clamping tool from a flare nut and a pipe. It is a figure which shows the reference example of FIG. It is a figure which shows another reference example of FIG. FIG. 10 is a view taken in the direction of arrow 10 in FIG. 9. It is a figure explaining the basic composition of the conventional technology.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Tightening tool, 11 ... Drive apparatus main body, 20 ... Gear drive means, 21 ... U-shaped groove, 22 ... Tightening gear, 23 ... Brake, 24 ... Input gear, 25 ... Gear shaft, 26 ... Slide groove, 27 DESCRIPTION OF SYMBOLS ... Slide groove, 30 ... Upper holder, 31 ... Lower holder, 32 ... Slide groove, 33 ... Slide groove, 34 ... Collar, 35 ... Spring, 41 ... Flare nut fitting part.

Claims (2)

In the tightening tool of the tightening nut provided in the middle of the member to be tightened,
A socket integrally having a fastening gear provided with a fitting portion for fitting to the head of the nut and a U-shaped groove for passing the member to be fastened, and when meshing with the fastening gear when the nut is fastened Both the input gear that transmits the power from the drive source and the gear shaft integrated with this input gear can be moved to the tightening gear side when the nut is tightened, and moved to the opposite side when the tightening gear is released. A tightening tool comprising: a slide groove that enables the input and a spring that separates the input gear from the tightening gear. 2. The tightening tool according to claim 1, wherein a switch means that operates with respect to the movement of the input gear is provided so that the operation of the drive source can be connected and disconnected .

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