JP4310554B2 - Sheet metal surface correction tool - Google Patents

Description

  The present invention relates to a sheet metal surface correction tool for correcting irregularities such as deformation and distortion of a sheet metal surface by extruding or pulling the sheet metal surface, and in particular, the sheet metal surface is fed using an air supply means (for example, a compressor). The present invention relates to a sheet metal surface correcting tool that operates an impact wrench mechanism with compressed air to move a piston in a cylinder forward and backward to correct irregularities on the sheet metal surface.

  Conventionally, as a tool of this type for repairing the unevenness of the automobile 200 caused by an accident, the handle 302 of the hydraulic pump 310 connected via the high pressure hose 303 is operated to extend the piston 302 from the cylinder 301. Extrude the concave portion 350 of the sheet metal surface through the attachment 155 attached to the tip (see FIG. 27 and FIG. 29), or operate the handle 311 of the hydraulic pump 310 connected through the high-pressure hose 303. As shown in FIG. 27 and FIG. 28, hydraulic sheet metal surface correction tools 300 and 400 are used as sheet metal surface correction tools for immersing the piston 402 into the cylinder 401, pulling the concave portion of the sheet metal surface (FIG. 28), and correcting the sheet metal surface. Proposed.

However, in this hydraulic sheet metal surface correction tool,
(1) In order to perform the sheet metal work smoothly, a sheet metal surface correction tool exclusively for extrusion that pushes out the concave portion (concave outward) (see FIGS. 27 and 29), and pulls the sheet metal surface to remove the concave portion. Two types (tables) of a sheet metal surface correcting tool (FIG. 28) dedicated to pulling for correction had to be prepared, and the two sheet metal surface correcting tools had to be used properly according to the properties of the sheet metal surface;
(2) If oil leakage from the hydraulic pump occurs during sheet metal processing, the vehicle may be contaminated by the leaked oil;
(3) Since it is difficult to disconnect the high-pressure hose 303 at the time of pressurization, the sheet metal work cannot be performed smoothly because the hydraulic pump becomes an obstacle during the work of correcting the sheet metal surface;
(4) In order to perform sheet metal work satisfactorily, two persons, a person who guides the tip of the piston to a desired correction position on the sheet metal surface, and a person who performs pressure work by a hydraulic pump are required;
Etc. had problems such as.

  Accordingly, an object of the present invention is to provide a sheet metal surface correcting tool that can correct a sheet metal surface by pushing out or pulling the sheet metal surface in accordance with the properties of the sheet metal surface.

  Another object of the present invention is to provide a sheet metal surface correction tool that does not contaminate an automobile during sheet metal work.

  Another object of the present invention is to cut the air hose connecting the compressed air supply means and the sheet metal surface correcting tool during the pushing or pulling of the piston, and to properly align the bonnet from the inside. An object of the present invention is to provide a tool for correcting a sheet metal surface that can be easily advanced while ensuring the correction even at a location.

  Still another object of the present invention is to provide a sheet metal surface correction tool capable of speedily performing the operation of guiding the tip of the piston to a desired correction position of the sheet metal surface and the operation of pushing out or pulling the piston alone. There is.

  Still another object of the present invention is to provide a compact sheet metal surface correcting tool that can withstand a load and has a long life even during a pulling operation in which a load is easily applied to the housing of the sheet metal surface correcting tool. It is to provide.

  In order to solve the above-mentioned problems, according to the present invention, there is provided a sheet metal surface correction tool comprising a housing and a piston mechanism having a cylinder and a piston, wherein the housing is provided with air channel means arranged to be switchable. An air introduction means having an air introduction path for introducing compressed air into the housing, and an impact wrench mechanism accommodated in the housing and operated by compressed air fed into the housing via the air introduction means; A screw bolt to which a rotational force is applied by the impact wrench mechanism, wherein the housing has a first housing portion and a second housing portion, and the impact wrench mechanism is provided in the first housing portion. Each screw bolt has a bolt head, and the bolt head of each screw bolt is received in the second receiving portion. The housing has a first opening formed on one of the end faces and a second opening formed on the other end face, and the first opening is covered by a first covering means. The second opening is covered by a second covering means, and the piston is movably disposed in the cylinder so as to be able to protrude and retract in conjunction with the rotation of the screw bolt, and the air in the housing There is provided a sheet metal surface correcting tool characterized in that the sheet metal surface can be corrected by switching the flow path to allow the piston of the piston mechanism to advance and retreat, thereby allowing the sheet metal surface to be pushed and pulled.

  The impact wrench mechanism has an air motor driven by compressed air fed into the housing and an impact wrench operated by the air motor, and a rotation direction switching valve switches the air flow path means, and the impact wrench mechanism The air flow path means has a first air flow path and a second air flow path that are switched by the rotation direction switching valve, and the air motor is arranged to switch the rotation direction of the air motor. The piston mechanism is operated by switching the rotation direction of the sheet metal to correct the sheet metal surface.

  The holding bolt is disposed so as to attach the cover means to each end face of the housing and close the end face. When the impact wrench mechanism is operated, the air flow path means in the housing is arranged. The sheet metal surface may be corrected by switching and operating the piston of the piston mechanism.

  The air introduction means may include a handle having an air introduction path formed therein, and the handle may be disposed above the housing.

  A pair of air passages constituting a part of the air flow path means may be formed on the inner wall surface of the first cover means.

The present invention is configured as described above, and the following effects are achieved according to the present invention.
(1) The sheet metal surface can be corrected by extruding or pulling the sheet metal surface in accordance with the properties of the sheet metal surface.
(2) It is possible to provide a sheet metal surface correction tool that does not contaminate a sheet metal part during sheet metal work.
(3) Even if the air hose connecting the compressed air supply means and the sheet metal surface correction tool is disconnected during the pushing or pulling-out operation of the piston, the position of the loaded piston can be maintained as it is. Even when it is necessary to confirm the alignment from the inside by actually closing the bonnet etc. during the sheet metal work, such as in a trunk room, the sheet metal work can be carried out reliably and easily (air It is possible to disconnect the hose and close the bonnet etc. to check the plate fittings one by one).
(4) Since the piston mechanism is operated simply by operating the switch lever, the work to guide the piston tip to the desired correction position on the sheet metal surface and the piston push-out or pull-back work can be performed quickly by one person. Is possible.
(5) Since it is provided with holding bolts that are inserted through the corners of the housing and connect the respective cover means for covering the openings formed at both ends of the housing, even if the housing is formed of a lightweight material, A compact sheet metal surface correcting tool that can sufficiently withstand the load and has a long life even during a drawing operation in which a load is easily applied to the housing of the sheet metal surface correcting tool can be obtained.
(6) A sheet metal surface correcting tool capable of pushing out or pulling back the piston by one-touch operation is obtained.

  In the sheet metal surface correction tool of the present invention, the air flow path of the compressed air formed in the housing is switched to advance and retract the piston constituting the piston mechanism, thereby correcting the sheet metal surface.

  For this reason, the sheet metal surface correction tool includes an air introduction means for introducing compressed air into the housing, an impact wrench mechanism housed in the housing, a screw bolt to which rotational force is applied by the impact wrench mechanism, and rotation of the screw bolt. A piston operating mechanism is provided that includes a piston that can move freely in and out of the cylinder.

  The air flow path in the housing is preferably switched by a rotation direction switching valve that switches the rotation direction of the air motor of the impact wrench mechanism.

  Moreover, it is preferable to provide the holding | suppressing volt | bolt which connects each cover means which is inserted in the corner part of a housing and covers the opening part formed in the both end surfaces of a housing.

Hereinafter, embodiments will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view of a sheet metal surface correction tool according to the present invention,
FIG. 2 is a front view of the sheet metal surface correction tool,
FIG. 3 is a rear view of the sheet metal surface correction tool,
FIG. 4 is a bottom view of the sheet metal surface correction tool,
FIG. 5 is a schematic right side view of the sheet metal surface correction tool when the switch lever of the sheet metal surface correction tool is operated and pulled up, and shows a state where the rotation direction switching valve is operated and pushed forward. ,
FIG. 6 is a schematic diagram of the right side of the sheet metal surface correction tool when the switch lever of the sheet metal surface correction tool is operated and pulled up, and the rotation direction switching valve is operated to push it backward from the state of FIG. Figure showing the state
FIG. 7 is a left side schematic view of the sheet metal surface correction tool,
FIG. 8 is a perspective view of a cap, which is a first covering means for covering an opening formed on the rear end surface of the housing of the sheet metal surface correction tool,
FIG. 9 is a schematic perspective sectional view showing the internal structure by cutting out a part of the sheet metal surface correction tool,
FIG. 10 is an enlarged schematic cross-sectional view taken along the line XX in FIG. 5, and is a diagram showing the flow of compressed air when the piston is advanced from the cylinder by rotating the air motor (counterclockwise rotation);
FIG. 11 is an enlarged schematic view of the broken line YY in FIG. 6, and is a diagram illustrating the flow of compressed air when the air motor is reversely rotated (clockwise) and the piston is housed in the cylinder.
FIG. 12 is a perspective view showing a state where the piston of the sheet metal surface correction tool is extended;
FIG. 13 is a front view showing a state where the piston of the sheet metal surface correction tool is extended,
FIG. 14 is a rear view showing a state where the piston of the sheet metal surface correction tool is extended;
FIG. 15 is a schematic perspective cross-sectional view showing the internal structure with a part cut away when the piston of the sheet metal surface correction tool is in an extended state;
FIG. 16 is an exploded perspective view showing each component of the sheet metal surface correction tool,
FIG. 17 is an exploded perspective view showing components of a housing, an air introduction unit, a piston mechanism, and a rotation direction switching valve that constitute a sheet metal surface correction tool,
FIG. 18 is an exploded perspective view showing each component of the impact wrench mechanism constituting the sheet metal surface correcting tool.

  In these drawings, the sheet metal surface correcting tool 1 is an air having a housing 10 in which an air flow path is switchable and an air introduction path (21A, 21B, 21C) for introducing compressed air into the housing 10. An introduction means 20, an impact wrench mechanism 30 accommodated in the housing 10 and operated by compressed air fed into the housing 10 via the air introduction means 20, and an air motor 40 constituting the impact wrench mechanism 30. A rotation direction switching valve 60 for switching the rotation direction, a screw bolt 70 to which a rotational force is applied by the impact wrench mechanism 30, and a piston that can move freely in and out of the cylinder in conjunction with the rotation of the cylinder 86 and the screw bolt 70. A piston mechanism 80 having 81 and the housing 10 A first lid that passes through the corner and covers the first opening 10A and the second opening 10B (see FIGS. 10, 11, and 17) formed on each end face of the housing 10. A holding bolt 90 for connecting the means 11 and the second covered means 12 is provided.

  The air flow path in the housing 10 has two air flow paths (a first air flow path and a second air flow path) which are switched by the rotation direction switching valve 60, which will be described later. The sheet metal surface is corrected by switching the air flow path and moving the piston 81 of the piston mechanism 80 back and forth (the sheet metal surface is pushed and pulled to be corrected).

  The housing 10 has a first housing portion 13A having a large diameter in the rear half portion and a second housing portion 13B having a diameter slightly smaller than that of the first housing portion 13A in the front half portion (FIGS. 10 and 11). FIG. 17).

  The impact wrench mechanism 30 and the guide piece 35 are accommodated in the first accommodating portion 13A of the housing 10, and the first opening 10A formed at one end surface of the housing 10 is a first covering means. The cap 11 is covered (closed) (see FIGS. 10 and 16). Further, the second receiving portion 13B of the housing 10 includes a bolt head 71 of the screw bolt 70, a spacer 101, thrust bearings 102A and 102B for smoothly turning the screw bolt 70, bolt receivers 103A, 103B is accommodated, and the second opening 10B formed on the other end surface of the housing 10 is covered (closed) by a cover 12 which is a second covering means (see FIGS. 10 and 16).

  The cap 11 is formed with a pair of left and right air passages 11A and 11B constituting a part of the air flow path on the inner wall surface (see FIGS. 5, 6, and 8).

  A cylindrical hole 14 into which the bush 65 is fitted is formed in the housing above the first accommodating portion 13A (FIGS. 10 and 11). The bush has a first air outflow hole 67 formed in the lower right rear portion and a second air outflow hole 68 formed in the lower front left portion (FIGS. 10 and 11). The housing is formed with two (a pair of) air passages 15 and 16 on both sides of the cylindrical hole 14 (see FIG. 17). One of the air passages 15 is one air passage 11A of the cap 11 and It faces (communicates with) the first outflow hole 67 of the bush, and the other 16 of the air passages is the other air passage 11B of the cap 11 and the second outflow hole of the bush. He is at 68 (communication).

  A step portion 10C is formed on the top surface of the housing 10, the air introduction means 20 has a handle 21 in which the air introduction path 21C is formed, and an air introduction hole 17 is formed in the step portion of the housing. It faces the air introduction path 21C of the handle (see FIGS. 1, 9, and 17). An exhaust hole 18 is formed on the bottom surface of the housing 10 corresponding to an air outlet hole 43A (see FIG. 18) formed at the bottom of a cylinder 43 of the air motor 40 described later (see FIG. 4). ).

  Further, a female screw portion 19 is screwed into a corner portion of the step portion 10C of the housing 10 (see FIG. 17), and a base end portion of the handle 21 is fixed to the step portion of the housing by a bolt 95.

The air introduction means 20 includes a handle 21, an air regulator 23 provided at the base end of the handle 21, an air valve 24 disposed at the bottom side center of the handle, and opens and closes the air valve. The switch lever 25 arranged on the switch lever 25, the stop pin 26 that stops (presses) the movement of the switch lever, and the cutout portion 25A (see FIGS. 1 and 9) formed at the free end of the switch lever And a stopper 27 that is pivotally supported by the shaft. The air valve is opened by operating the switch lever toward the bottom surface of the handle, and the switch lever is restrained by the restraining pin so as to maintain the air valve in the opened state.
Reference numeral 9 denotes a connector for connecting an air hose connected to the free end of the handle 21.

  Inside the handle 21, the air introduction paths 21A, 21B, and 21C for introducing compressed air into the housing 10 are formed (see FIGS. 9 to 11).

  The air regulator 23 rotates the knob 23A, and adjusts the opening degree of the flow rate adjusting hole 23B (see FIG. 9) by the depth of screwing between the air regulator 23 and the housing 21, and the air introduction path 21C. Adjust the air flow rate of the compressed air passing through.

  The air valve 24 has a valve body 24A (see FIG. 9), and this valve body is disposed in a valve chamber 22 disposed between the air introduction paths 21A and 21B. When the switch lever 25 is operated and the lower end of the air valve 24 is pushed upward while contacting the top surface of the switch lever 25, the valve body 24A of the air valve 24 is The air introduction passages 21A, 21B, and 21C communicate with each other by floating up from the air and the compressed air to be introduced is formed in the air introduction hole 17 (see FIG. 9, see FIG. 17). On the other hand, when the switch lever 25 returns to the original state (for example, the state shown in FIGS. 1 to 3), the valve body 24A of the air valve 24 is closed, and the air introduction paths 21A and 21B are shut off. Inflow of air from the air introduction path 21A to the air introduction path 21B is prevented and not performed.

  The base end portion of the switch lever 25 is pivotally supported by a short shaft 28 inserted through a pin insertion hole formed at the bottom center of the handle 21 (see FIG. 2).

  The restraining pin 2 is pulled upward by piercing through pin insertion holes 29A (see FIGS. 1 and 17) of a pair of left and right extending portions 29 depending from the lower surface of the free end portion side of the handle 21. Further, the movement of the switch lever 25 is stopped.

  The impact wrench mechanism 30 includes an air motor 40 driven by compressed air fed into the housing 10 and an impact wrench 50 operated by the air motor 40.

  The air motor 40 holds a rotor 41, each blade 42 detachably held in each slit 41A formed in the rotor 41, a cylinder 43 that accommodates the rotor 41 and the blade 42, and the rotor 41. A front plate 44 and a rear plate 45, a front bearing holder 46A and a rear bearing holder 46B that smoothly rotate the rotor 41, an O-ring 47 that prevents air leakage, and an oil seal 48.

  A rotor shaft 41B of the rotor 41 is engaged with a central shaft hole 53B of a cam 53 constituting the impact wrench 50.

  The rear plate 45 has a pair of left and right air inflow holes 45A and 45B. Further, an air inflow groove 45C starting from the air inflow hole 45A is formed above the air inflow hole 45A, and compressed air is supplied to the rotor 41 through the air inflow hole 45C. Further, an air inflow groove 45D starting from the air inflow hole 45B is formed above the air inflow hole 45B, and compressed air for reverse rotation is supplied to the rotor 41 side through the air inflow hole 45D. .

  The rear plate 45 and the front plate 44 communicate with each other with a pin 49 inserted through a through hole 45E of the rear plate 45.

  The impact wrench 50 includes a hammer 51, a hammer frame 52, a cam 53 that transmits the rotation of the rotor 41 to the hammer 51, the hammer frame 52, and the spindle 54, and the rotational output of the air motor 40 to the screw bolt 70. A transmission spindle 54 (impact output shaft) and a hammer pin 55 constituting the shaft body of the hammer 51 are provided. A protrusion 51 </ b> A formed on the hammer 51 is loosely fitted in a notch 53 </ b> A of the cam 53.

  When the hammer 51 rotates counterclockwise together with the hammer frame 52, the outer peripheral end wall 51B of the hammer 51 can be locked to one locking wall portion 54B formed in the recessed portion 54A of the spindle 54. When the hammer 51 rotates clockwise together with the hammer frame 52, the outer peripheral end wall 51C of the hammer 51 is locked to the other locking wall portion 54C formed in the recessed portion 54A of the spindle 54. It is configured to be possible. The tip 54D of the spindle 54 is engaged with a bolt head 71 of the screw bolt 70 (see FIG. 9).

The hammer pin 55 is inserted into a bearing hole 52B formed at a position offset toward the outer peripheral side from the insertion hole 52A formed at the center of the hammer frame 52 through which the rotor shaft 41B is inserted. The hammer frame 52 is pivotally supported through the hole 51D. Thus, the hammer 51 operates around the hammer pin 55.
Reference numeral 56 is a color.

Even when the air motor 40 is driven, when the load is not initially applied to the tip of the piston 81, the hammer 51, the hammer frame 52, the spindle 54 and the screw bolt 70 are rotated together, and the piston 81 is rotated. Advances and retreats the cylinder 86 (the piston 81 appears from the cylinder 86 or is immersed in the cylinder 86).
After that, when the piston 81 is further advanced and retracted, a load is applied to the piston 81 and a further rotational force is required to operate the screw bolt 70, which is supported by the rotor shaft 41B of the rotor 41. The cam 53 temporarily pushes up the hammer 51.
Then, when the piston 81 is advanced, the locking wall portion 54B of the spindle 54 and the outer peripheral end wall 51B of the hammer 51 are unlocked, and the hammer 51 rotates together with the hammer frame 52 once. To do. During this one rotation, the hammer 51 is pushed down while being guided by the movement of the cam 53, and after one rotation, the outer peripheral end wall 51B of the hammer 51 is again engaged with the locking wall portion 54B of the spindle 54. Stopped. Thus, shock is applied to the spindle 54, the screw bolt 70 is rotated, and the piston 81 further advances (when the piston 81 is pulled back, the locking wall portion 54C of the spindle 54 and the outer periphery of the hammer 51). The hammer 51 is rotated once together with the hammer frame 52. The hammer 51 is pushed down while being guided by the movement of the cam 53 during one rotation, and after one rotation. Again, the outer peripheral end wall 51C of the hammer 51 is locked to the locking wall portion 54C of the spindle 54. Thus, the spindle 54 is shocked, the screw bolt 70 is rotated, and the piston 81 further Pulled back.)

  A large part of the rotational direction switching valve 60 is accommodated in the bush 65 with good switching mode (see FIGS. 10 and 11), and both end portions of the rotational direction switching valve 60 protrude from the bush 65. ing.

  The rotation direction switching valve 60 switches the rotation direction of the air motor 40 constituting the impact wrench mechanism 30 by switching the air flow path of the compressed air introduced from the air introduction means 20.

  Therefore, the rotational direction switching valve 60 is formed with two groove portions 61 and 62 (FIGS. 10, 11, and 17), and the groove portions 61 and 62 are formed in the air flow path formed in the housing 10. This contributes to switching (a first air flow path and a second air flow path described later). That is, when the rotation direction switching valve 60 is pushed forward (the state shown in FIG. 10), air flows through the groove portion 61 behind the bush 65 and passes through the air passage 11A of the cap 11 (see FIG. 8). Passes through the air inlet hole 45A (see FIG. 18) of the rear plate 45 and further enters the air introduction port 40A (see FIGS. 5 and 6) of the air motor 40 to rotate the air motor 40 counterclockwise. (Rotate counterclockwise). For this reason, the spindle 54 of the impact wrench 50 is also rotated counterclockwise to rotate the screw bolt 70. As a result, the piston 81 is pushed out from the inside of the cylinder 86 and appears to advance (from the state shown in FIGS. 1, 9 and 10 to the state shown in FIGS. 12 and 15).

  Conversely, when the rotation direction switching valve 60 is pushed rearward (state shown in FIG. 11), air flows into the groove 62 in front of the bush 65 and passes through the air passage 11B of the cap 11 (see FIG. 8). The air passes through the air inflow hole 45B (see FIG. 18) of the rear plate 45 and further enters the air introduction port 40B (see FIGS. 5 and 6) of the air motor 40, and the air motor 40 is moved clockwise. Rotate (turn right). For this reason, the spindle 54 of the impact wrench 50 is also rotated in the clockwise direction to rotate the screw bolt 70. As a result, the piston 81 is pulled back into the cylinder 86 (from the state shown in FIGS. 12 and 15 to the state shown in FIGS. 1, 9, and 10).

  The bush 65 is formed with an air inflow hole 66 at the center of the top surface, an air outflow hole 67 at the lower right side of the rear, and an air outflow hole 68 at the lower left side of the front (see FIGS. 10 and 11). When the rotation direction switching valve 60 is pushed forward, the compressed air passes through the air inflow hole 66, the groove 61 of the rotation direction switching valve 60, and the air outflow hole 67. Through the air passage 11A of the cap 11, as described above, the air is guided to the air inlet 40A side of the air motor 40 (see FIGS. 5 and 10).

  When the rotation direction switching valve 60 is pushed forward, the compressed air passes through the air inflow hole 66, the groove 62 of the rotation direction switching valve 60, and the air outflow hole 68. Further, it is guided to the air introduction port 40B side of the air motor 40 through the air passage 11B of the cap 11 as described above (see FIGS. 6 and 11).

  Thus, a first air flow path is formed in the housing 10 by the air introduction hole 17, the air inflow hole 66, the air outflow hole 67, the air passage 15, the air passage 11A, the air inflow hole 45A, and the air inflow groove 45C. A second air flow path is formed by the air introduction hole 17, the air inflow hole 66, the air outflow hole 68, the air passage 16, the air passage 11B, the air inflow hole 45B, and the air inflow groove 45D. As described above, the housing 10 is provided with air flow path means formed by the first air flow path and the second air flow path, which can be freely switched by the rotation direction switching valve 60. Yes.

  As described above, the screw bolt 70 is applied with a rotational force by the impact wrench mechanism 30. For this reason, the receiving portion formed on the bolt head 71 of the screw bolt 70 is engaged with the spindle 54 of the impact wrench 50 constituting the impact wrench mechanism 30.

  The piston mechanism 80 includes a piston 81, a cylinder 86, and a piston guide piece 88.

  The piston 81 is hollow and has a central hole formed therein so as to extend in the longitudinal direction. The piston is threaded with a female screw portion 82 into which the male screw portion 72 of the screw bolt 70 is screwed. In addition, a guide groove 83 for guiding the piston guide piece 88 is formed on the outer peripheral wall of the piston, and the guide groove is disposed so as to extend in the longitudinal direction of the piston (see FIG. 12). On the free end side of the piston 81, a male screw portion 81A for screwing the attachment 155 (see FIG. 22) is formed.

  The cylinder 86 and the piston guide piece 88 contribute to smoothly reciprocating the piston 81 by preventing the piston 81 from rotating. At that time, the cylinder 86 guides the piston 81 when the piston 81 advances and retreats in the cylinder.

  The piston guide piece 88 is fixed to the inner peripheral wall of the cylinder 86 with a screw 89.

  Further, the first lid means (cap) 11, the housing 10 and the second lid means (cover) 12 are integrally connected by four holding bolts 90 inserted through the corners of the housing 10. Is done. That is, the holding bolt 90 is disposed so that the covered means 11 and 12 are attached to the end faces of the housing 10 and the end faces are closed. For this reason, the front-end | tip of the said holding | maintenance volt | bolt 90 is screwed by the internal thread part 12A formed in the said 2nd to-be-covered means 12 (refer FIG. 9).

  Now, when compressed air is supplied to the sheet metal surface correction tool 1 by the compressor 210 connected via the connector 9 and the air hose 230, when the air valve 24 is in the closed state, the air is air in the handle 21. It has reached the passage 21A. At this time, when the switch lever 25 is pulled upward, the air passages 21A, 21B, and 21C communicate with each other, and air flows into the housing 10 through the air introduction hole 17 formed in the top surface of the housing 10. In this case, when the rotation direction switching valve 60 is pushed to the right as shown in FIG. 10, the air flows into the groove portion 61 of the rotation direction valve 60, the air passage 11 </ b> A of the cap 11, and the air motor 40. Passing through the air inflow hole 45A of the rear plate 45 and hitting the blade 42, the rotor 41 is rotated counterclockwise to advance the piston.

The following operation is performed when correcting the concave portion 250 (the outward concave portion) generated in the quarter panel of the trunk room 201 of the automobile 200 (see FIGS. 19 to 21).
(1) If necessary, attachments 150, 155, and 160 are attached to the sheet metal surface correction tool 1 (FIGS. 19, 20, and 22).
(2) The compressor 210 and the sheet metal surface correction tool 1 are connected via the connector 9 and the air hose 230 (FIG. 21).
(3) The attachment 155 is applied to the convex part 250 which corrects a sheet metal (FIG. 21).
(4) The lever switch 25 is operated to push out the piston 81 and correct the convex portion 250.
(5) In this case, the above 1. To 4. After setting the sheet metal surface correction tool 1 so as not to be detached from the sheet metal surface (convex portion 250), the air ON / OFF switch 220 attached in the middle of the air hose 230 is temporarily turned OFF, and the switch lever The switch lever 25 may be pressed by the stop pin 26 while the 25 is pulled up, and then the air ON / OFF switch 220 may be turned on for remote operation.

When the recess 251 of the door panel 202 of the automobile 200 is pulled and the recess is pulled out for correction (flattening), the following operation is performed (see FIGS. 23 to 26).
(1) The compressor 210 and the sheet metal surface correction tool 1 are connected via the connector 9 and the air hose 230.
(2) The air ON / OFF switch 220 is operated to set the piston 81 in an extruded state (FIG. 23).
(3) The chain 180 is attached to the automobile sheet metal correcting tool 1 via the attachments 160 and 170 (FIGS. 23 and 24).
(4) Connect one end of the chain 180 to the column 190 to which the tip of the chain 180 is fixed, and connect the other end of the chain 180 to the door panel 202 side (see FIG. 25).
(5) The air ON / OFF switch 220 is operated to immerse the piston 81 into the cylinder and pull out the recess 251 to correct the recess 251 (the sheet metal correction tool 1 shifts from the state of FIG. 25 to the state of FIG. 26). ).

  It is a perspective view of the sheet metal surface correction tool concerning the present invention.   It is a front view of a sheet metal surface correction tool.   It is a rear view of a sheet metal surface correction tool.   It is a bottom view of the sheet metal surface correction tool.   It is a right side schematic view of the sheet metal surface correction tool when the switch lever of the sheet metal surface correction tool is operated and pulled up, and is a view showing a state where the rotation direction switching valve is operated and pushed forward.   FIG. 6 is a schematic right side view of the sheet metal surface correction tool when the switch lever of the sheet metal surface correction tool is operated and pulled up, and shows a state in which the rotation direction switching valve is operated and pushed backward from the state of FIG. 5. FIG.   It is a left side schematic diagram of a sheet metal surface correction tool.   It is a perspective view of the cap which is the 1st covering means which covers the opening formed in the rear end surface of the housing of a sheet metal surface correction tool.   It is the perspective cross-section schematic which notched some metal sheet surface correction tools and showed the internal structure.   FIG. 6 is an enlarged schematic cross-sectional view taken along the line XX in FIG. 5, illustrating a flow of compressed air when the air motor is rotated (counterclockwise) to advance the piston from the cylinder.   FIG. 7 is an enlarged schematic cross-sectional view taken along the line YY in FIG. 6, illustrating the flow of compressed air when the air motor is reversely rotated (clockwise) and the piston is housed in the cylinder.   It is a perspective view which shows the state which the piston of the sheet metal surface correction tool extended.   It is a front view which shows the state which the piston of the sheet metal surface correction tool extended.   It is a rear view which shows the state which the piston of the sheet metal surface correction tool extended.   It is the perspective cross-sectional schematic diagram which notched one part and showed the internal structure when the piston of the sheet metal surface correction tool is in the extended state.   It is a disassembled perspective view which shows each component of a sheet metal surface correction tool.   It is a disassembled perspective view which shows each component of the housing which comprises a sheet metal surface correction tool, an air introduction means, a piston mechanism, and a rotation direction switching valve.   It is a disassembled perspective view which shows each component of the impact wrench mechanism which comprises a sheet metal surface correction tool.   It is a front view which shows the state which attached the attachment to the sheet metal surface correction tool.   It is a front view which shows the state which attached the attachment to the sheet metal surface correction tool, the switch lever was stopped by the stop pin in a state where the switch lever was operated, and the piston was further extended.   It is a schematic plan view showing a use state when an attachment is attached to a sheet metal surface correction tool and a concave portion of a quarter panel of an automobile trunk room is pushed out and corrected.   It is a perspective view of the attachment attached to a sheet metal surface correction tool as needed.   It is a front view which shows the state which attached the attachment to the sheet metal surface correction tool, the switch lever was stopped by the stop pin in a state where the switch lever was operated, and the piston was further extended.   It is a front view which shows the state which attached the attachment to the sheet metal surface correction tool, the switch lever was stopped by the stop pin in a state where the switch lever was operated, and the piston was housed in the cylinder.   It is a schematic plan view showing a use state when an attachment is attached to a sheet metal surface correction tool and a concave portion of a door panel of an automobile is pulled and corrected.   It is a schematic plan view showing a use state when an attachment is attached to a sheet metal surface correction tool and a concave portion of a door panel of an automobile is pulled out and corrected.   It is a perspective view which shows the conventional sheet metal surface correction tool, (A) is a figure before a piston comes out, (B) is a figure of the state which the piston protruded.   It is a perspective view which shows the other conventional sheet metal surface correction tool, (A) is the state which the piston protruded, (B) is a figure of the state which the piston retracted.   FIG. 28 is a schematic plan view showing a use state when a concave portion of a quarter panel of a trunk room of an automobile is pushed and corrected using the conventional sheet metal surface correction tool shown in FIG. 27.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet metal surface correction tool 10 Housing 20 Air introduction means 21A Air introduction path 21B Air introduction path 21C Air introduction path 30 Impact wrench mechanism 40 Air motor 50 Impact wrench 60 Rotation direction switching valve 70 Screw bolt 80 Piston mechanism 81 Piston 86 Cylinder 90 Press bolt

Claims (14)

A housing (10);
A sheet metal surface correction tool comprising a piston mechanism (80) having a cylinder (86) and a piston (81),
The housing has air flow path means arranged to be switchable,
An air introduction means (20) having an air introduction path (21A, 21B, 21C) for introducing compressed air into the housing;
An impact wrench mechanism (30) which is accommodated in the housing and is operated by compressed air fed into the housing via the air introduction means;
A screw bolt (70) to which a rotational force is applied by the impact wrench mechanism,
The housing has a first accommodating portion (13A) and a second accommodating portion (13B),
The impact wrench mechanism is accommodated in the first accommodating portion,
Each screw bolt has a bolt head (71);
A bolt head of each screw bolt is accommodated in the second accommodating portion,
The housing has a first opening (10A) on one of the end faces and a second opening (10B) on the other end face,
The first opening is covered by a first covering means (11) and the second opening is covered by a second covering means (12) ,
The piston is movably disposed in the cylinder so that it can be moved in and out in conjunction with rotation of the screw bolt,
A tool for correcting a sheet metal surface, wherein the sheet metal surface is corrected by switching the air flow path in the housing to allow the piston of the piston mechanism to move forward and backward to enable pushing and pulling of the sheet metal surface. The impact wrench mechanism has an air motor (40) driven by compressed air fed into the housing and an impact wrench (50) operated by the air motor,
A rotation direction switching valve (60) is arranged to switch the air flow path means to switch the rotation direction of the air motor of the impact wrench mechanism,
The air flow path means is a first air flow path (17, 66, 67, 15, 11A, 45A, 45C) and a second air flow path (17, 66, 68, 16) that are switched by the rotation direction switching valve. , 11B, 45B, 45D)
2. The sheet metal surface correction tool according to claim 1, wherein the sheet metal surface is corrected by operating the piston mechanism by switching the rotation direction of the air motor. A holding bolt (90) is arranged to attach the covering means (11, 12) to each end face of the housing and close the end face,
2. The sheet metal surface correction according to claim 1, wherein when the impact wrench mechanism is operated, the air flow path means in the housing is switched and the piston of the piston mechanism is operated to correct the sheet metal surface. Tools. A holding bolt (90) is arranged to attach the covering means (11, 12) to each end face of the housing and close the end face,
The sheet metal surface correction tool according to claim 2, wherein the rotation direction of the air motor is switched to operate the piston of the piston mechanism to correct the sheet metal surface.   The said air introduction means is comprised including the handle (21) by which the air introduction path was formed in the inside, and this handle is arrange | positioned above the said housing. The sheet metal surface correction tool according to one item. 5. A pair of air passages (11A, 11B) constituting a part of the air flow path means are formed on the inner wall surface of the first covering means, respectively. sheet metal surface modification tool according to one paragraph or. The housing is formed with a cylindrical hole (14) for fitting a bush (65) above the first accommodating portion,
The bush has a first air outflow hole (67) formed in the lower right rear portion and a second air outflow hole (68) formed in the lower front left portion,
Two air passages (15, 16) are formed on both sides of the cylindrical hole in the housing,
One of the air passages (15) faces one air passage (11A) of the first covering means and the first air outflow hole of the bush (65),
The other air passage (16) is one of claims 1 to 4, characterized in that faces the other air passage (11B) and said second air outlet hole of said bushing of said first tegmentum means sheet metal surface modification tool according to one paragraph or. A step (10C) is formed on the top surface of the housing,
The air introduction means has a handle (21) in which the air introduction path is formed,
The sheet metal surface correction tool according to any one of claims 1 to 4, wherein an air introduction hole (17) faces the air introduction path (21C) of the handle in the step portion of the housing. A female screw hole (19) is threaded into the corner of the step of the housing,
9. The sheet metal surface correction tool according to claim 8 , wherein a base end portion of the handle is fixed to the step portion of the housing by a bolt (95). The air introduction means includes a handle (21), an air regulator (23) provided at a base end portion of the handle, an air valve (24) disposed at a bottom side center of the handle, and operates the air valve. The switch lever (25) arranged so as to stand up, a stop pin (26) for selectively stopping the movement of the switch lever, and a cutout portion (25A) formed at the free end of the switch lever And a stopper (27) pivotally supported by the shaft,
The air valve is opened by operating the switch lever toward the bottom surface of the handle,
The sheet metal surface correction tool according to any one of claims 1 to 5, wherein the switch lever is restrained by the restraining pin so as to maintain the open state of the air valve. The air valve has a valve body (24A),
The valve body is disposed in a valve chamber (22) disposed between the air introduction passages, and the valve body of the air valve is operated by operating the switch lever so that the lower end portion of the air valve is the top of the switch lever. When pushed up while contacting the surface, the air introduction path communicates with each other by floating from the valve seat of the valve chamber to form an open state, and the compressed air to be introduced is formed on the top surface of the housing The sheet metal surface correction tool according to claim 10 , wherein the tool flows into the housing through the air introduction hole. The sheet metal surface correction tool according to claim 7 , wherein both ends of the rotation direction switching valve protrude from the bush. The piston mechanism includes a piston (81), a cylinder (86), and a piston guide piece (88), and the piston is formed in a hollow shape so that a central hole is formed in the interior thereof so as to extend in the longitudinal direction. ,
A female screw (82) into which a male screw (72) of the screw bolt is screwed is screwed into the center hole of the piston,
A guide groove (83) for guiding the piston guide piece is formed on the outer peripheral wall of the piston,
The sheet metal surface correction tool according to any one of claims 1 to 5, wherein the guide groove is disposed so as to extend in a longitudinal direction of the piston.   The first cover means, the housing, and the second cover means are integrally connected by the presser bolt inserted through the corner of the housing, and the tip of the presser bolt is the second cover The sheet metal surface correction tool according to claim 3 or 4, wherein the tool is screwed into a female screw portion (12A) formed in the means.

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