Patent Description:
As a drawing-out tool for sheet metal for drawing-out a recess part on a sheet metal surface during sheet metal process, a drawing-out tool for sheet metal for drawing-out while applying a fine force to an apex of a bit for welding on the sheet metal surface has been proposed by the present inventors (<CIT>; corresponding application <CIT>).

A drawing-out tool for sheet metal shown in <CIT> includes: a center shaft; a first operation means arranged to an apex part of the center shaft and provided with a bit weldable to a sheet metal surface; a second operation means for pulling-up the first operation means; a support member for supporting the first operation means; an energization mechanism for supplying electric current to the bit; a leg body for supporting the second operation means; and a power source cord for supplying electricity to the energization mechanism, and is used by connecting the other end side of the power source cord to a welder, and makes it possible to perform a series of sheet metal operations such as supplying electric current to the bit, welding the apex of the bit to a sheet metal correction front surface to pull up a recess part of the sheet metal correction surface, furthermore, after pulling-up of the recess part, releasing the welding of the bit.

Now, in a sheet metal working field that uses a drawing-out tool for sheet metal, dust, metal dust, soil dust and the like are present abundantly. Therefore, the followings are required, that is, (<NUM>) dust, metal dust, soil dust and the like do not mingle in or attach to an energization mechanism for supplying electric current to the bit, and (<NUM>) a trouble such as contact failure is not generated in an electric system.

Furthermore, the working field of the sheet metal process is generally not guaranteed with sufficient lighting, therefore, in order to make it possible to perform the sheet metal process efficiently in a short time even in a dark working field, at least, (<NUM>) sufficient lighting is secured during the sheet metal process, and (<NUM>) an operator can visually clearly observe unevenness of a sheet metal surface are desired from the viewpoint of an operation environment are desired.

In this point, a drawing-out tool for sheet metal shown in <CIT> is not necessarily sufficient in protection of an electric system of an energization mechanism for supplying electric current to a bit, furthermore, the drawing-out tool for sheet metal itself is not provided with a means for illuminating a sheet metal surface. Therefore, there are risks such that (<NUM>) a trouble is generated when dust, metal dust, and soil dust mingle in or attach to an electric system of an energization mechanism for supplying electric current to the bit (for example, a contact failure that is generated when dust, metal dust, and soil dust mingle in from a first throughhole formed in the energization mechanism to make the dust, metal dust, and soil dust attach to a contact part between a center shaft inserted into the first throughhole and an energization chip that is a constituent member of the energization mechanism), (<NUM>) when a working field is poorly illuminated, the irregularity on a surface of the sheet metal is difficult to see to be incapable of efficiently performing the sheet metal process, and (<NUM>) when an external illumination means is provided, even when a sheet metal surface is illuminated, for example, from an oblique front direction, a shadow due to the center shaft or the bit tends to be generated on the sheet metal surface (see, for example, <FIG>), in particular, in the case where the shadow overlaps with the irregularity on the sheet metal surface, there is a risk such that a small relief on the sheet metal surface becomes difficult to see to be difficult to perform the sheet metal process smoothly to cause a bad influence on the sheet metal process (see, for example, <FIG>) or the like.

<CIT> relates to an electrical conduction mechanism which prevents dust or like from adhering to the inside of an electrical-conduction portion main body, so that electrical conduction efficiency cannot be reduced. This tool is provided with a center shaft; a first operation means provided with a bit arranged to an apex part of the center shaft and weldable to a sheet metal surface; a second operation means for pulling-up the first operation means; an energization mechanism for supplying electric current to the bit; and a leg body for supporting the second operation means. The energization mechanism is provided with an electrical-conduction portion main body in the center of which a first through-hole to be inserted through by a shaft is formed and in which a second through-hole communicating with the first through-hole is formed in a direction perpendicular to a direction in which the first through-hole is formed; and an electrical conduction element disposed in the second through-hole. The electrical-conduction element is configured to including an electrical-conduction chip abutting on the shaft, and a coil spring biasing the electrical- conduction chip toward the shaft, so that current is supplied to the shaft through the electrical-conduction chip to the conduct electrical to the bit.

<CIT> relates to a drawing-out tool for a sheet metal which is convenient to draw out the sheet metal surface while adding small force when it is required to further draw out thin part after completing wild tapping work, when a part to be drawn is relatively small region of recessed part, or even when the drawing-out place is extremely special place. This tool is provided with a first operating means provided with a shaft and a weldable bit which is arranged in the tip part of the shaft and weldable on the sheet metal face, a second operating means which is provided with a supporting part for supporting the shaft of the first operating means and with which the first operating means is pulled up by a manual operation and a leg body for supporting the second operating means. The second operating means is composed including a main lever, a second lever and a spring interposed between the main lever and the second lever.

<CIT> relates to a tool for the repair of a small dents in the sheet metal surfaces of motor vehicles uses a laser beam assembly as a pointer, instead of a mechanical pointer, and the laser beam produces a sharply focused small dot of light to precisely locate the hidden working head of the tool in exact alignment with the small dent, thereby facilitating efficient removal of the dent. This tool is provided with an elongated bar having a handle at one and a working head at the other end, the working head comprising a replaceable ball of the size selected to engage the ding on the hidden side of the sheet metal; and a pointer connected to the tool comprising a laser beam generating means constructed and arranged to generate a beam of laser light and for projecting the laser beam to produce a small locator dot of light onto the visible side of the sheet metal exactly opposite said working head hidden on the other side of said sheet metal.

The invention is defined by a drawing-out tool for sheet metal according to independent claim <NUM>. The dependent claims are directed advantageous embodiments.

Advantageously, it is provided a drawing-out tool for sheet metal that is less in failure and excellent in the durability and has excellent handling property by shielding dust, metal dust, soil dust and the like from mingling in and attaching to an electric system, and by evading a trouble from occurring in an electric system.

Advantageously, it is provided a drawing-out tool for sheet metal which can secure sufficient brightness during a sheet metal process, can clearly see a relief on a sheet metal surface in the neighborhood of the bit necessary to be subjected to sheet metal process, and can efficiently perform the sheet metal process while illuminating irregular parts necessary to be subjected to the sheet metal process even when the working field is poorly illuminated.

Advantageously, it is provided a drawing-out tool for sheet metal which can evade generation of a shadow due to the center shaft or the bit on a sheet metal part even when the sheet metal surface is illuminated, can secure brightness sufficient for performing the sheet metal process, and can perform the sheet metal process while illuminating the neighborhood of the welded bit in a state where the shadow is not present.

Advantageously, it is provided a drawing-out tool for sheet metal which constitutes a compact illumination unit by integrating illumination members in a housing, can freely control an amount of light and can accurately illuminate a place necessary to be subjected to the sheet metal process.

Advantageously, the following advantages may be obtained.

A drawing-out tool for sheet metal according to the present invention includes: a center shaft; a first operation means provided with a bit arranged to an apex part of the center shaft and weldable to a sheet metal surface; a second operation means for pulling-up the first operation means; an energization mechanism for supplying electric current to the bit; and a leg body for supporting the second operation means, wherein a housing for accommodating an illumination unit and the illumination unit for illuminating the sheet metal surface accommodated in the housing are provided.

The housing includes: a space for accommodating the energization mechanism; and a power source accommodating part for accommodating a power source for a light source constituting the illumination unit.

The illumination unit includes: a light source incorporated in the housing; a power source for the light source for supplying electric power to the light source; and a light diffusion plate for diffusing light supplied from the light source, wherein the light source is fixed on a printed circuit board; and the printed circuit board and the light diffusion plate are preferably arranged correspondingly isolated.

A drawing-out tool for sheet metal according to the present invention is also made into a drawing-out tool for sheet metal including: a center shaft; a first operation means provided with a bit arranged to an apex part of the center shaft and weldable to a sheet metal surface; a second operation means for pulling-up the first operation means; an energization mechanism for supplying electric current to the bit; and a leg body for supporting the second operation means, wherein a housing for accommodating an illumination unit and the illumination unit for illuminating the sheet metal surface accommodated in the housing are provided; wherein the housing includes a space for accommodating the energization mechanism, and a power source accommodating part for accommodating a power source for a light source constituting the illumination unit; wherein the illumination unit includes a light source incorporated in the housing, the power source for a light source for supplying electric power to the light source, and a light diffusion plate for a diffusing light supplied from the light source; wherein the light source is fixed on a printed circuit board, and the printed circuit board and the light diffusion plate are arranged correspondingly isolated; wherein diffused light obtained by making light supplied from the light source pass the light diffusion plate is made possible to be supplied as diffused light for illuminating a limited area in the neighbourhood of the bit.

Furthermore, a drawing-out tool for sheet metal according to the present invention is also made into a drawing-out tool for sheet metal including: a center shaft; a first operation means provided with a bit arranged to an apex part of the center shaft and weldable to a sheet metal surface; a second operation means for pulling-up the first operation means; a support member for supporting the first operation means; an energization mechanism for supplying electric current to the bit; and a leg body for supporting the second operation means, wherein a housing for accommodating an illumination unit and the illumination unit for illuminating the sheet metal surface accommodated in the housing are provided; wherein the housing includes a space for accommodating the energization mechanism, and a power source accommodating part for accommodating a power source for a light source for constituting the illumination unit; wherein the illumination unit includes a light source incorporated in the housing, the power source for a light source for supplying electric power to the light source, and a light diffusion plate for a diffusing light supplied from the light source; wherein the light source is fixed on a printed circuit board, and the printed circuit board and the light diffusion plate are arranged correspondingly isolated; and wherein diffused light obtained by making light supplied from the light source pass the light diffusion plate is made possible to be supplied as diffused light that does not generate a shadow in a limited area in the neighbourhood of the bit.

Still furthermore, a drawing-out tool for sheet metal according to the present invention is also made into a drawing-out tool for sheet metal including: a center shaft; a first operation means provided with a bit arranged to an apex part of the center shaft and weldable to a sheet metal surface; a second operation means for pulling-up the first operation means; a support member for supporting the first operation means; an energization mechanism for supplying electric current to the bit; a leg body for supporting the second operation means; and a power cord for supplying electricity to the energization mechanism, wherein a housing for accommodating an illumination unit and the illumination unit for illuminating the sheet metal surface accommodated in the housing are provided; wherein the housing includes a space for accommodating the energization mechanism, and a power source accommodating part for accommodating a power source for a light source for constituting the illumination unit; wherein the illumination unit includes a light source incorporated in the housing, the power source for a light source for supplying electric power to the light source, and a light diffusion plate for a diffusing light supplied from the light source; wherein the light source is fixed on a printed circuit board, and the printed circuit board and the light diffusion plate are arranged corresponding isolated; and wherein diffused light obtained by making light supplied from the light source pass the light diffusion plate is made possible to be illuminated on a sheet metal surface in the neighbourhood of the bit, and the diffused light is made possible to be supplied as the diffused light that does not generate the shadow due to the center shaft and the bit in a limited small area in the neighbourhood of the bit.

It is preferable to form division walls in the housing to partition the space and the power source accommodating part by the division walls.

The power source accommodating part has an opening part that makes it possible to insert and release the power source for light source and the opening part is clogged with a cover member.

It is preferable to accommodate a base end part of the second operation means in the space of the housing.

The light source is LED light sources, the LED light sources are fixed on the printed circuit board arranged in the housing, and a plurality of the LED light sources are arranged spaced equidistant apart on the printed circuit board to form an LED light source group.

The illumination unit may be formed such that an illuminance adjusting volume part is provided, and a light amount of the LED light source is adjustable by the illuminance adjusting volume part.

It is preferable that the housing is supported by the second operation means supported by the leg body.

The housing may be formed such that the space for accommodating the energization part body, a first insertion hole through which the center shaft is inserted, a second insertion hole through which a supporting screw for supporting the housing is inserted, a third insertion hole through which a support shaft for supporting a second lever constituting the second operation means is inserted, a through hole for exposing one end of the illuminance adjusting volume part, the power source accommodating part, and a step part for accommodating the light diffusion plate and directed downward are provided.

The second operation means includes a pair of arms extended right and left, the arm and the energization part body are integrally formed, the arms are supported by the leg body, in a state where the energization part body is housed in the space of the housing, an apex of a supporting screw inserted in the second insertion hole formed in the housing screws with a screw hole formed in the energization part body, in this state, the other end of the supporting screw stays in the second insertion hole, and the housing may be formed so as to be supported by the energization part body.

In what follows, an example relating to the present invention will be described together with a drawing-out tool for sheet metal constituted by accommodating an energization part body of an energization mechanism in a housing and by incorporating an illumination unit in the housing with reference to the drawings. Here, a light emitting diode (LED) is used as a light source, and a charge type battery is used as a power source for light source is shown.

In <FIG>, an illumination unit <NUM> illuminates a sheet metal surface and is accommodated in a housing <NUM>.

The illumination unit <NUM> includes an illumination part body <NUM> and a light diffusion plate <NUM>. Among these, the illumination part body <NUM> includes an LED light source <NUM> incorporated in the housing <NUM> and a battery <NUM> for supplying electric power to the LED light source. The printed circuit board <NUM> on which the LED light source is fixed and the light diffusion plate <NUM> are arranged correspondingly isolated in the housing.

The illumination unit <NUM> includes an illuminance adjusting volume part <NUM> and a light amount of the LED light source <NUM> may be adjusted by the illuminance adjusting volume part.

The LED light source <NUM> is constituted of <NUM> LED light sources, the LED light sources are connected in parallel and arranged spaced equidistant apart in a circumference direction of the printed circuit board <NUM> arranged in the housing (see <FIG>, <FIG>). Thus, the LED light sources <NUM> constitute an LED light source group. A mark 70A shows two lead wires (power source line) and 70B shows three lead wires (volume lines) (see <FIG>). Among these, the lead wire 70A is connected to the printed circuit board <NUM> at one end thereof, and the other end (apex) is lead to a lead hole (not shown in the drawing) bored at an end part of a side wall 10D that partitions the housing <NUM> and connected to the battery via a charge plug <NUM>. Furthermore, the lead wire 70B is connected to the printed circuit board <NUM> at one end thereof and the other end (apex) is connected to the illuminance adjusting volume part <NUM>.

The printed circuit board <NUM> is formed into an outer shape of a circle and is provided with an insertion hole through which a center shaft <NUM> is inserted at a center.

The printed circuit board <NUM> includes two capacitors 75A, 75B, a driving IC (FET) <NUM>, and a variable resistor <NUM>. The variable resistor <NUM> adjusts a voltage applied to the driving IC (FET) to control a light amount (brightness) of the LED light source <NUM>. That is, a voltage applied to the driving IC (FET) <NUM> is adjusted by operating a knob (knob nut that makes operate) <NUM> that turns the illuminance adjusting volume part <NUM> and an amount of light of the LED light source <NUM> may be controlled thereby. The capacitors 75A, 75B absorb noise.

The diffused light obtained by making light supplied from the LED light source pass the light diffusion plate is irradiated on a sheet metal surface in the neighbourhood of the bit <NUM>. The diffused light is supplied as diffused light that does not generate the shadow due to the center shaft <NUM> and the bit <NUM> of the drawing-out tool for sheet metal in a limited small area in the neighbourhood of the bit.

The light diffusion plate <NUM> is formed of a translucent resin member and has an insertion hole through which the center shaft <NUM> is inserted formed at a center.

The printed circuit board <NUM> and the light diffusion plate <NUM> are provided with a screw insertion hole formed at each of the corresponding same positions, and, the printed circuit board and the light diffusion plate are locked to the housing by a locking screw <NUM> inserted into a screw insertion hole in a correspondingly isolated state.

In <FIG>, the housing <NUM> accommodates the illumination unit <NUM> that illuminates a sheet metal surface. The housing <NUM> includes the division walls (10C, 10D) formed of the vertical wall 10C and lateral wall (bottom wall) 10D that partition the housing. By the division wall, the housing is partitioned into a space 10A and a power source accommodating part <NUM>.

In the housing <NUM>, the space 10A that can house an energization part body <NUM> and a spring <NUM>, a first insertion hole <NUM> through which the center shaft <NUM> is inserted, a second insertion hole <NUM> through which a supporting screw <NUM> for supporting the housing is inserted, a first through hole <NUM> for exposing one end of the charging plug <NUM>, a third insertion hole <NUM> through which a support shaft <NUM> for supporting a second lever <NUM> constituting the second operation means <NUM> inserts, a second through hole <NUM> for exposing one end of the illuminance adjusting volume body <NUM>, a missing part <NUM> for accommodating shoulder parts of arms 43A, 43B formed on the second operation means <NUM>, a power source accommodating part <NUM> for accommodating the battery <NUM>, and a downward-directed step parts <NUM> for accommodating the light diffusion plate <NUM> are formed.

The arms 43A, 43B and the energization part body <NUM> are integrally formed, and the arms are supported by the leg body <NUM>. In a state where the energization part body is accommodated in the space of the housing, an apex of the supporting screw inserted in the second insertion hole formed in the housing is screwed with a screw hole <NUM> formed in the energization part body, and, in this state, the other end of the supporting screw stays in the second insertion hole, and the housing is supported by the energization part body.

Thus, the housing <NUM> is supported by the second operation means <NUM> supported by the leg body <NUM>.

In the power source accommodating part <NUM>, an opening part 17A that allows insertion and release of the battery (battery for light source) is formed. The opening part is clogged by locking a cover member <NUM> with a locking screw 18A.

A mark <NUM> shows an E ring, in a bearing part <NUM> for supporting the support shaft <NUM> in a state where the second lever <NUM> is pivotally supported, the support shaft <NUM> is fastened, the looseness of the support shaft is prevented (see <FIG>, <FIG>, <FIG>, <FIG> and <FIG>).

The charge plug <NUM> is a charge plug into which a cord of a charger is inserted for charging when the battery <NUM> is consumed.

Furthermore, an energization mechanism <NUM> is incorporated in a drawing-out tool for sheet metal <NUM>.

In <FIG>, <FIG>, the energization mechanism <NUM> is formed as an energization mechanism for supplying electric current to the bit <NUM> weldable to a sheet metal surface arranged at an apex part of the center shaft <NUM>.

The energization mechanism <NUM> includes the energization part body <NUM> formed from a conductive member, and the energization part body has a first through hole <NUM> for inserting the center shaft <NUM> at a center as a vertical hole. Furthermore, in a direction orthogonal to a formation direction of the first through hole, a pair of left and right second through holes 103A, 103B that are communicated with the first through hole are formed as lateral holes.

The second through holes 103A, 103B each are provided with an energization element <NUM>. On a lower part of the energization part body <NUM>, a recess part 101A for accommodating and holding an upper end part of a spring <NUM> is formed. A mark <NUM> shows a screw hole formed on a lower part of the second through hole <NUM>. The supporting screw <NUM> supports the energization part body <NUM> in the housing <NUM>. The screw hole <NUM> is screwed with the (apex of) supporting screw <NUM> inserted in the insertion hole <NUM> formed in the housing <NUM> in a state where the energization part body <NUM> is housed in a space 10A of the housing. In this state, the other end of the supporting screw <NUM> stays in the insertion hole <NUM>, and the housing supports the energization part body.

The energization element <NUM> is constituted by including an energization chip <NUM> that abuts on the center shaft <NUM>, and a coil spring <NUM> that biases the energization chip in the center shaft direction, and an electric current is supplied to the center shaft via the energization chip to supply electric current to the bit (see <FIG>, <FIG>).

The energization chip <NUM> has an apex surface formed into an elliptical cross-section by obliquely cutting a cylindrical member, and in the energization part body, an apex surface of the energization chip <NUM> and the center shaft <NUM> abut on each other by line contact (see <FIG>).

The second through hole <NUM> is formed, as was described above, as the lateral hole for every two points in a horizontal direction of the energization part body (see <FIG>, <FIG>, <FIG>), in a state where the center shaft <NUM> is inserted in the first through hole <NUM>, the energization element <NUM> is arranged to each of the lateral holes, and the energization chips <NUM> facing via the center shaft <NUM> are in contact with the center shaft <NUM> with uniform pressure strength.

A spacer <NUM> formed of an insulator is interposed between the energization chip and a coil spring, and the energization chip <NUM> and the coil spring <NUM> are placed in a nonconductive state. Thus, an electric current does not flow to the coil spring <NUM>, and the coil spring <NUM> is evaded from being burned by the electric current (the electric current does not flow to the coil spring <NUM> via the energization chip <NUM>).

The energization element <NUM> is inserted into the second through hole <NUM>, and in a state where the energization chip is abutting on the center shaft, the screw <NUM> is screwed with an opening part of the second through hole to close the opening part.

In <FIG>, the drawing-out tool for sheet metal <NUM> in which the illumination unit <NUM> is incorporated is shown. In the drawing-out tool for sheet metal <NUM>, the illumination unit <NUM> is incorporated in the housing <NUM> that is arranged at the center of the drawing-out tool for sheet metal <NUM>.

The drawing-out tool for sheet metal <NUM> includes: the center shaft <NUM>; a first operation means <NUM> provided with the bit <NUM> arranged at the apex part of the center shaft and weldable to a sheet metal surface; the second operation means <NUM> that can be manually operated and is formed to pull-up the first operation means <NUM>; a support member <NUM> formed to support the first operation means <NUM>; the leg body <NUM> formed to support the second operation means <NUM>; the housing <NUM>; the illumination unit <NUM>; the energization mechanism <NUM> for conducting electricity to the bit <NUM>; and an electric power cord <NUM> for supplying electricity to the energization mechanism <NUM>. The first operation means <NUM> includes the center shaft <NUM> and a handle <NUM> for rotating the center shaft provided to one end of the center shaft <NUM>.

The drawing-out tool for sheet metal <NUM> includes, as was described above, the housing <NUM> for accommodating the illumination unit <NUM> for illuminating a sheet metal surface.

The illumination unit <NUM> includes: the LED light source <NUM> incorporated in the housing <NUM>; the battery <NUM> for supplying electric power to the LED light source; and the light diffusion plate <NUM> for diffusing light supplied from the LED light source. The LED light source is fixed on the printed circuit board <NUM>. In the housing, the printed circuit board and the light diffusion plate are arranged correspondingly isolated.

The diffused light obtained by making light supplied from the light source pass through the light diffusion plate makes it possible to illuminate a sheet metal surface in the neighbourhood of the bit, and in a limited small area in the neighbourhood of the bit, the diffused light is supplied as the diffused light that does not generate a shadow due to the center shaft and the bit.

The first operation means <NUM> includes: the center shaft <NUM> made of brass; and the handle <NUM> for rotating the center shaft provided to one end of the center shaft <NUM>, and the bit <NUM> is provided to an apex part of the center shaft <NUM>.

That is, one end part 22A of the center shaft <NUM> constituting the first operation means <NUM> is screwed with a screw hole of a connection part 21B formed by continuing to the handle <NUM>, on the other hand, a female screw part formed to the apex part 22B of the center shaft <NUM> is screwed with a male screw part provided to a base end part of the bit <NUM> (see <FIG>).

A screw part <NUM> is engraved over from a substantial center to a base end part of the center shaft <NUM>, the screw part <NUM> is screwed with the support member <NUM> of the second operation means <NUM>, and the first operation means <NUM> is rotatably supported by the second operation means <NUM>.

A spring <NUM> is wound around the center shaft <NUM>. Here, the spring <NUM> has a spring upper end part located in the recess 101A of the energization part body <NUM>, and a spring lower end part located on a top surface of the support member <NUM>, which are wound around the center shaft <NUM>. The spring <NUM> biases the second lever <NUM> downward, pulls-up the second lever <NUM> while resisting against the resilient force of the spring to execute the sheet metal process.

The second operation means <NUM> is constituted by containing a main lever <NUM> and a second lever <NUM>, and the spring <NUM> interposed between the main lever <NUM> and the second lever <NUM>.

The main lever <NUM> includes: a handle part <NUM> formed by coating an insulation member; and a pair of the right and left arms 43A, 43B extended in a direction orthogonal to an arrangement direction of the handle part 41and supported by the leg body <NUM>. One end of a power source cord (terminal cord) <NUM> is fixed to a back end of the main lever <NUM>, and the other end of the power source cord is connected to a welder <NUM>.

A flow of an electric current during a sheet metal surface correction operation is shown in <FIG>. During energization, the electric current flows a path of the welder <NUM> --> power source cord <NUM> → main lever <NUM> → energization part body <NUM> -> energization chip <NUM> -> center shaft <NUM> -> bit <NUM> to energize.

The second lever <NUM> includes: in the same manner as the handle part <NUM>, a handle part <NUM> formed by coating an insulation member; a hollow part <NUM> formed on an apex part side of the handle part <NUM>; and a bearing part <NUM> for supporting the support shaft <NUM> for pivotally supporting the second lever <NUM>.

The second lever <NUM> includes the support member <NUM> for supporting the first operation means <NUM>. In the support member <NUM>, a center through hole (penetration part) <NUM> is formed, in the center through hole <NUM> a female screw part is formed, and the male screw part <NUM> of the center shaft <NUM> is screwed with the female crew part.

The support member <NUM> is accommodated in the hollow part <NUM>, and both end parts of the support member <NUM> are supported by frames <NUM> on both sides of the hollow part <NUM>. Thus, a female screw part of the through hole (penetrating part) <NUM> of the support member <NUM> and a male screw part <NUM> of the center shaft <NUM> are screwed, and the first operation means <NUM> is rotatably supported by the second operation means <NUM>.

The main lever <NUM>, the arms 43A, 43B, and the energization part body <NUM> are integrally formed (see <FIG>).

Thus, the drawing-out tool for sheet metal includes: the center shaft; a first operation means provided with a bit arranged to an apex part of the center shaft and weldable to a sheet metal surface; a support member formed for supporting the first operation means; a second operation means formed for pulling-up the first operation means; a leg body formed for supporting the second operation means; a power source cord for supplying electricity to the energization mechanism; and the energization mechanism for conducting an electric current to the bit, in which the first operation means includes: the center shaft; and a handle for rotating the center shaft provided at one end of the center shaft.

Furthermore, the drawing-out tool for sheet metal includes a housing for accommodating an illumination unit for illuminating a sheet metal surface, the illumination unit includes: a light source incorporated in the housing; a power source for light source for supplying electric power to the light source; and the light diffusion plate for diffusing the light supplied from the light source, the printed circuit board and the light diffusion plate are arranged correspondingly isolated in the housing, the diffused light obtained by making the light supplied from the light source pass the light diffusion plate is made possible to be illuminated on the sheet metal surface in the neighbourhood of the bit, and the diffused light is supplied as the diffused light that does not generate a shadow due to the center shaft and bit in the limited small area in the neighbourhood of the bit.

Claim 1:
A drawing-out tool for sheet metal comprising:
a center shaft (<NUM>);
a first operation means (<NUM>) provided with a bit (<NUM>) arranged to an apex part of said center shaft (<NUM>) and weldable to a sheet metal surface;
a second operation means (<NUM>) for pulling-up said first operation means (<NUM>);
an energization mechanism (<NUM>) for supplying electric current to said bit (<NUM>); and
a leg body (<NUM>) for supporting said second operation means (<NUM>),
characterized by:
a housing (<NUM>) for accommodating an illumination unit (<NUM>), and
said illumination unit (<NUM>) for illuminating said sheet metal surface accommodated in said housing (<NUM>) are provided,
said housing (<NUM>) comprising:
a space (10A) for accommodating said energization mechanism (<NUM>), and
a battery accommodating part (<NUM>) for accommodating a battery (<NUM>) for an LED light source (<NUM>) constituting said illumination unit (<NUM>),
said illumination unit (<NUM>) comprising:
an illumination part body (<NUM>) including the LED light source (<NUM>) incorporated in said housing (<NUM>) and the battery (<NUM>) for supplying electric power to the LED light source (<NUM>);
said battery (<NUM>) for said LED light source (<NUM>) for supplying electronic power to said LED light source (<NUM>); and
a light diffusion plate (<NUM>) for diffusing light supplied from said LED light source (<NUM>),
wherein said LED light source (<NUM>) is constituted of six LED light sources, said LED light sources are fixed on a printed circuit board (<NUM>) arranged in said housing (<NUM>), and said LED light sources are constituted as an LED light source group in which said LED light sources are arranged spaced equidistant apart on said printed circuit board (<NUM>); and
said printed circuit board (<NUM>) and said light diffusion plate (<NUM>) are arranged correspondingly isolated.