Portable power tools

Abstract

To provide a portable power tool that allows for an easily visible information display area without increasing the size of the machine. [Solution] The hook 30 is substantially L-shaped with a bent portion 31, and comprises a hook base 32 on the grip 11 side of the bent portion 31, and a hooking portion 36 on the tip side of the bent portion 31. When viewed from the direction of extension of the hooking portion 36, with the bent portion 31 side being the upward direction, the tip direction of the hooking portion 36 being the downward direction, the direction perpendicular to the upward and downward direction and when viewed from the direction of extension of the hook base 32, with the bent portion 31 side being the forward direction, the opposite direction of the forward direction being the backward direction, and the direction perpendicular to both the upward and downward direction and the forward and backward direction being the left and right direction, at least a part of the hook base 32 extends diagonally in a direction that forms an acute angle with respect to the direction of extension of the hooking portion 36.

Description

Technical Field

[0001] The present invention relates to portable power tools such as nail guns and screw drivers, and particularly to a portable power tool provided with a hook for hooking onto an operator's belt, scaffold, etc.

Background Art

[0002] Conventionally, various portable power tools incorporating operating mechanisms have been used. For example, driving tools (such as nail guns, screw drivers, and screw drivers) that operate using power such as electricity or compressed air are known. Also, as such portable power tools, those provided with a hook for hooking onto an operator's belt, scaffold, etc. are known (see, for example, Patent Document 1). By providing such a hook, work can be performed with both hands free, or a carried tool can be suspended at the work site.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004]

[0005]

[0006] An object of the present invention is to provide a portable power tool that can keep the tip position of the hook as high as possible while avoiding interference with other operating members arranged at the grip end.

Means for Solving the Problems

[0007] To solve the above-mentioned problems, the present invention provides a portable power tool comprising: an output unit incorporating an operating mechanism for driving fasteners; a grip formed in a cylindrical shape so that it can be grasped by an operator and connected to the output unit; and a hanging hook provided near the end of the grip that is not connected to the output unit when viewed in the direction of extension of the grip, wherein the hook is substantially L-shaped with a bent portion and comprises a hook base on the grip side of the bent portion and a hooking portion on the tip side of the bent portion, and when viewed in the direction of extension of the hooking portion with the bent portion side as the upward direction, the tip direction of the hooking portion as the downward direction, the direction perpendicular to the upward and downward direction and when viewed in the direction of extension of the hook base with the bent portion side as the forward direction, the opposite direction of the forward direction as the rear direction, and the direction perpendicular to both the upward and downward direction and the front-to-back direction as the left-to-right direction, at least a part of the hook base extends diagonally in a direction that forms an acute angle with respect to the direction of extension of the hooking portion. [Effects of the Invention]

[0008] As described above, the present invention is such that, when viewed from the left or right, at least a portion of the hook base extends diagonally in a direction that forms an acute angle with respect to the extension direction of the hook portion. Therefore, it is possible to keep the tip position of the hook as high as possible while avoiding interference with other operating members located at the grip end. [Brief explanation of the drawing]

[0009] [Figure 1] This is a side view of a portable power tool. [Figure 2] This is a perspective view of a portable power tool. [Figure 3] This is a rear view of a portable power tool. [Figure 4] A plan view of a portable power tool, (a) showing the hook in the closed position, and (b) showing the hook in the open position. [Figure 5] The following are (a) a plan view, (b) a front view, (c) a side view, (d) a rear view, (e) a bottom view, and (f) a cross-sectional view along line BB of the hook. [Figure 6]This is an enlarged side view of section A of a portable power tool. [Figure 7] This is a side view of a modified hook. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described with reference to the figures. In the following description, a driving tool 10 that operates using compressed air as power will be used as an example of a portable power tool. However, the portable power tools covered by the present invention are not limited to the driving tool 10 that operates using compressed air as power. That is, the present invention may be applied to portable power tools that operate using something other than compressed air (electricity, springs, fuel combustion pressure, gas pressure, water pressure, etc.), or to portable power tools other than the driving tool 10.

[0011] The fastening tool 10 according to this embodiment is capable of ejecting fasteners from the ejection port 13a, and as shown in Figure 1, comprises an output unit 12, a grip 11, a magazine 14, and a nose unit 13.

[0012] The output unit 12 has an operating mechanism built into the cylindrical body housing that performs the fastener driving operation. The fastening tool 10 according to this embodiment has a pneumatic operating mechanism that drives out the fastener using the pressure of compressed air.

[0013] Although not specifically illustrated, this operating mechanism consists of a piston slidably housed within a cylindrical cylinder, with a driver attached to the lower surface of the piston for striking the fastener. When compressed air is supplied to the upper surface of the piston, the piston descends forcefully, and the fastener is launched downward by the driver, which operates integrally with the piston.

[0014] The grip 11 is the part that the operator holds when using the fastening tool 10, and is formed in a cylindrical (rod-like) shape so that the operator can grip it. This grip 11 is connected to the output unit 12 described above at approximately a right angle. A trigger 15 is provided on this grip 11 in a position that can be operated by the hand holding the grip 11. Specifically, the trigger 15 is positioned where the operator's index finger rests when gripping the grip 11 (the inner corner formed by the grip 11 and the output unit 12), and can be operated by pulling the trigger 15 with the index finger. This trigger 15 is for operating the fastening. That is, the operating mechanism is activated when the trigger 15 is operated, and the fastener is ejected.

[0015] Magazine 14 is for storing a linked fastener consisting of multiple fasteners connected together. The linked fasteners stored in Magazine 14 are sequentially supplied to the nose section 13, which will be described later, and are held so that the leading fastener is positioned directly below the driver.

[0016] The nose section 13 is a part integrally provided at the lower end of the output section 12. Although not shown in the diagram, a fastener supply mechanism is provided behind the nose section 13, and this fastener supply mechanism operates in conjunction with the fastening operation, so that fasteners stored in the magazine 14 are automatically supplied one by one to the nose section 13.

[0017] An injection path is formed inside the nose portion 13 to guide the fastener's ejection. Fasteners supplied by the fastener supply mechanism wait within this injection path. When the trigger 15 is operated in this state, the aforementioned driver slides toward the nose portion 13, and the fastener waiting within the injection path is ejected from the injection port 13a formed at the tip of the nose portion 13.

[0018] Incidentally, as shown in FIGS. 1 to 4, the driving tool 10 according to the present embodiment includes an end cap 20, a pressure regulating operation unit 25, and a hook 30 near the end of the grip 11 (near the end of the grip 11 that is not connected to the output unit 12 when viewed in the extending direction of the grip 11).

[0019] The end cap 20 is a member attached to the open end of the grip 11. The grip 11 according to the present embodiment is formed in a hollow cylindrical shape, and the open end is open when the end cap 20 is not attached. The end cap 20 is attached so as to close the opening of the open end of the grip 11. Thereby, an air chamber is formed inside the grip 11 and inside the output unit 12. This air chamber is a space for storing compressed air supplied from the outside. The compressed air stored in the air chamber is supplied to the operating mechanism in conjunction with the operation of the trigger 15 and is used for the driving operation.

[0020] The above-described end cap 20 includes a cylindrical air supply pipe 21 for connecting a hose of an air compressor or the like. The air supply pipe 21 is formed to project in the extending direction of the grip 11. A plug-shaped connection portion 22 that allows a hose to be connected with one touch is provided at the end of the air supply pipe 21. By attaching a hose to this connection portion 22, compressed air can be supplied from an external air compressor into the air chamber.

[0021] The pressure adjustment control unit 25 is a component for operating a pressure reducing valve to adjust the pressure of compressed air supplied from the outside (the pressure taken out from the air compressor). By operating this pressure adjustment control unit 25, the driving force can be adjusted according to conditions such as the type of fastener used and the hardness of the workpiece. As shown in Figure 6, the pressure adjustment control unit 25 is attached to the end cap 20 and is rotatable around a rotation axis 25a parallel to the axis of the grip 11. Furthermore, the pressure adjustment control unit 25 according to this embodiment is equipped with a lever 25b formed to protrude outward from the rotation axis 25a, and the user can rotate the pressure adjustment control unit 25 by operating this lever 25b. The pressure reducing valve located inside the end cap 20 is opened and closed in conjunction with the rotation of the pressure adjustment control unit 25, and the pressure taken out from the air compressor is configured to fluctuate.

[0022] The hook 30 is for suspending the driving tool 10. As shown in Figure 5, the hook 30 is roughly L-shaped with a bent portion 31, and comprises a hook base 32 on the grip 11 side of the bent portion 31, and a hooking portion 36 on the tip side of the bent portion 31. Furthermore, a mounting portion 38 is formed protruding from the end of the hook base 32 opposite to the bent portion 31 in the same direction as the hooking portion 36. Hereinafter, as shown in Figure 5, the direction of the bent portion 31 side will be described as the upward direction when viewed in the direction of extension of the hooking portion 36, the tip direction of the hooking portion 36 will be described as the downward direction, the direction perpendicular to the up and down direction and on the side of the bent portion 31 when viewed in the direction of extension of the hook base 32 will be described as the forward direction, the opposite direction of the forward direction will be the rear direction, and the direction perpendicular to both the up and down direction and the front and back direction will be described as the left and right direction.

[0023] The hook base 32 and the hook portion 36 intersect at an acute angle in a roughly L-shape at the bending portion 31. As shown in Figures 5(a) and 5(b), the hook base 32 and the hook portion 36 are formed so that their width (width in the shorter direction) is approximately equal when viewed from above. Furthermore, as shown in Figure 5(c), the hook portion 36 is formed so that its thickness (width in the shorter direction) when viewed from left to right gradually narrows towards the tip, making it easy to insert the hook 30 when hooking it.

[0024] By hooking this hook 30 onto a belt or pipe, the inside of the bent portion 31 (i.e., the inner corner where the hook base 32 and the hook portion 36 intersect) can be engaged with the belt or pipe, allowing the driving tool 10 to be suspended and supported. When the driving tool 10 is suspended by hooking the hook 30, the heavy output portion 12 hangs below the grip 11.

[0025] As shown in Figure 6, the hook 30 according to this embodiment is rotatably attached near the end of the grip 11 by inserting the mounting portion 38 into the fixing portion 40 on the machine body side. As a result, the mounting portion 38 becomes the pivot axis 38a, and the tip of the hook 30 is rotatable relative to the tool body in an arc. As shown in Figure 5(c), the hook portion 36 and the mounting portion 38 extend parallel to each other in the same direction. Therefore, the pivot axis 38a of the hook 30 is parallel to the extension direction of the hook portion 36 and the axial direction of the grip 11, respectively. With this configuration, no matter how the hook 30 is rotated, the extension direction of the hook portion 36 is maintained to be parallel to the axial direction of the grip 11.

[0026] Furthermore, as shown in Figure 5(c), a pin hole 38b is formed through the tip of the mounting portion 38. A pin (not shown) is inserted into this pin hole 38b to prevent the mounting portion 38 from falling off the fixing portion 40.

[0027] The fixing portion 40, into which the mounting portion 38 engages, is provided, for example, on the end cap 20 and positioned at the joint between the grip 11 and the magazine 14, as shown in Figure 6. The fixing portion 40 has an insertion hole (not shown) into which the mounting portion 38 of the hook 30 can be inserted. The mounting portion 38 inserted into this insertion hole is biased upward by a spring. In addition, a plurality of engagement grooves that engage with the pin of the mounting portion 38 are formed radially on the lower surface of the fixing portion 40, centered on the insertion hole. As the mounting portion 38 is biased upward by the spring, the pin engages with one of the plurality of engagement grooves, preventing the hook 30 from coming off or rotating. Furthermore, when the hook 30 is pushed downward against the biasing force of the spring, the engagement between the engagement groove and the pin is released, and the hook 30 becomes rotatable.

[0028] Incidentally, this hook 30 can be used not only for hanging but also as an information display area. That is, as shown in Figure 5(c), the hook 30 according to this embodiment has a wide portion 33 formed on the side surface 32c of the hook base 32 when viewed from the left or right direction. Therefore, this wide portion 33 can be used as an information display area.

[0029] As shown in Figure 5(c), the wide portion 33 is formed such that, when the hook 30 is viewed from the left or right direction, its thickness W1 is greater than that of the other parts of the hook base 32. In this embodiment, the wide portion 33 is positioned closer to the hook portion 36 side (closer to the front) when viewed in the extending direction of the hook base 32. Specifically, when comparing the center position of the wide portion 33 and the center position of the hook base 32 when viewed in the extending direction of the hook base 32, the center position of the wide portion 33 is closer to the hook portion 36 than the center position of the hook base 32. This arrangement allows for the display area of ​​information to be provided in an easily visible position at the tip.

[0030] The wide section 33 in this embodiment is provided with an information display section 34 for displaying tool information. Although not specifically shown, this information display section 34 can display arbitrary information such as product name, handling precautions, and information to identify the owner. The information may be displayed by directly writing or engraving on the information display section 34. Alternatively, a label or plate may be attached to the information display section 34 to display the information. As shown in Figures 5(c) and 5(f), the information display section 34 in this embodiment is formed on a flat surface to which a label or plate can be attached, so a label or plate can be easily attached. In addition, since the information display section 34 is formed in a recessed position compared to the surrounding area, attached labels or plates are less likely to peel off. To display as much information as possible on this wide section 33, it is desirable to make the longitudinal dimension of the wide section 33 as large as possible. In this embodiment, the longitudinal dimension of the hook base 32 is 74 mm, of which the longitudinal dimension of the wide section 33 (information display section 34) is 45 mm. Thus, it is desirable that the longitudinal dimension of the wide portion 33 (information display portion 34) be 50% or more of the longitudinal dimension of the hook base portion 32.

[0031] However, if information is to be displayed on the surface of the hook 30 in this way, the increased size of the hook 30 may affect its ease of hooking. In this regard, in this embodiment, as shown in Figure 5(c), the thickness width W3 of the hook portion 36 (the width of the hook portion 36 in the shorter direction when viewed from the left and right directions) is kept slim, so even if the information display portion 34 is provided, it does not affect the ease of hooking the hook 30. Specifically, in this embodiment, as shown in Figure 5(c), the thickness width W1 of the wide portion 33 (the width of the wide portion 33 in the shorter direction when viewed from the left and right directions) is made larger than the thickness width W3 of the hook portion 36 (the width of the hook portion 36 in the shorter direction when viewed from the left and right directions). In this embodiment, the dimension of W1 is 21.5 mm and the dimension of W3 is 7.4 mm. Thus, it is desirable that the dimension of W1 be between 2 and 5 times the dimension of W3. Furthermore, it is even more desirable that the dimension of W1 be between 2.5 and 4 times the dimension of W3.

[0032] Furthermore, as shown in Figures 5(a) and 5(c), the thickness W1 of the wide section 33 (the width of the wide section 33 in the shorter direction when viewed from the left-right direction) is larger than the width W2 of the wide section 33 (the width of the wide section 33 in the shorter direction when viewed from the top-bottom direction). In other words, since the width W2 of the wide section 33 is not increased, the hook 30 can be kept compact even when the information display section 34 is provided. Therefore, it does not interfere with, for example, inserting or removing the plug into the air supply pipe 21 or operating the pressure adjustment operation section 25. In this embodiment, the dimension of W1 is 21.5 mm and the dimension of W2 is 12.9 mm. It is desirable that the dimension of W1 be between 1.5 and 3 times the dimension of W2.

[0033] Furthermore, as shown in Figure 5(f), the cross-section of the wide portion 33 is formed so that it gradually widens as it goes downwards. That is, the side surfaces 32c on both sides of the wide portion 33 are inclined to gradually widen outwards as they go downwards, and the cross-section is triangular or trapezoidal. By adopting this shape, the hook 30 can be made compact and lightweight while ensuring the area and strength of the load-bearing lower surface 32b.

[0034] Furthermore, the lower surface 32b of the hook base 32 according to this embodiment is provided with a hole 35 as shown in Figure 5(e). By providing this hole 35, the hook 30 is made even lighter.

[0035] Incidentally, such a hook 30 should be positioned as high as possible (upward in Figure 1) to avoid interfering with operation. For example, as shown in Figure 6, by positioning the tip (lower end) of the hook portion 36 of the hook 30 above the grip 11 (the part that the operator can grasp), the hook 30 does not get in the way when holding the tool. Also, the hook 30 does not get in the way when opening and closing the magazine 14. On the other hand, if the hook 30 is positioned high, it is more likely to interfere with the plug of the air supply pipe 21 and the pressure adjustment operation unit 25, making it difficult to secure the space necessary for these operations. Furthermore, if the hook 30 is positioned too high, the overall length of the machine will increase. Therefore, it is desirable to position the hook 30 as high as possible without increasing the overall length of the machine, while ensuring that the hook 30 does not interfere with other components such as the pressure adjustment operation unit 25.

[0036] In this embodiment, as shown in Figure 6, when the hook 30 is viewed from the left and right directions, the pressure adjustment operation unit 25 is positioned above the lowest position P1 on the upper surface 32a of the hook base 32. Therefore, space is secured above the hook 30 for operating the pressure adjustment operation unit 25.

[0037] Furthermore, the upper surface 32a of the hook base 32 according to this embodiment is gradually inclined upward as it moves forward, that is, it is inclined so that the hooking portion 36 side is higher. With this configuration, the position for hooking the hook 30 can be positioned as high as possible while still securing space for operating the pressure adjustment operation unit 25.

[0038] To explain this in other words, as shown in Figure 5(c), when viewed from the left or right, the hook base 32 and the hook portion 36 of the hook 30 form an acute angle (the inner corner of the bent portion 31 forms an acute angle). In other words, when viewed from the left or right, the upper surface 32a of the hook base 32 gradually slopes upward as it moves forward. In this embodiment, the hook base 32 and the hook portion 36 intersect at an angle of approximately 68 degrees. Thus, it is desirable for the hook base 32 and the hook portion 36 to form an acute angle in the range of 60 to 80 degrees. Furthermore, it is even more desirable for the hook base 32 and the hook portion 36 to form an acute angle in the range of 65 to 75 degrees.

[0039] With this embodiment, it is possible to achieve both a configuration in which the hook 30 is positioned at a high position and a configuration in which the hook 30 is less likely to interfere with other components. Furthermore, since the highest position P2 of the upper surface 32a of the hook base 32 is lower than the upper end position P5 of the air supply pipe 21, the overall length of the machine does not increase even when the hook 30 is positioned at a high position.

[0040] In this embodiment, as shown in Figure 6, when comparing the height positions of the upper surface 32a of the hook base 32 and the lever 25b of the pressure regulating operation unit 25, the highest position P2 of the upper surface 32a of the hook base 32, the upper end position P4 of the lever 25b of the pressure regulating operation unit 25, the lower end position P3 of the lever 25b of the pressure regulating operation unit 25, and the lowest position P1 of the upper surface 32a of the hook base 32 are arranged in that order from highest to lowest. With this configuration, it is possible to position the hook 30 as high as possible (higher than the lever 25b) while achieving a layout in which the lever 25b passes over the hook 30 when the lever 25b is rotated.

[0041] As described above, the driving tool 10 according to this embodiment has a wide portion 33 formed on the side surface 32c of the hook base 32 when viewed from the left and right directions, so that an information display area can be secured using this wide portion 33. Furthermore, since the wide portion 33 is visible from the left and right sides, an information display area can be secured in an easily visible position.

[0042] It is also conceivable to use the hook portion 36 instead of the hook base 32 to secure the information display area, but in this case, the hook portion 36 must be made larger than usual. If the hook portion 36 is made larger, it may become difficult to hook onto belts or pipes, or the strength may decrease due to the length of the hook portion 36. In this respect, if a wide portion 33 is formed on the side surface 32c of the hook base 32 as in this embodiment, the ease of hooking the hook 30 is not affected, and no strength problems arise. Rather, the strength against bending load is improved as the hook base 32 becomes thicker.

[0043] It is also conceivable to secure the information display area on the upper surface 32a of the hook base 32 rather than on the side surface 32c of the hook base 32. However, in this case, it would be difficult to check the information when the hook 30 is hooked onto temporary scaffolding or the like, and the width of the hook 30 would be increased. In this respect, if a wide portion 33 is formed on the side surface 32c of the hook base 32 as in this embodiment, the information is easy to see even when the hook 30 is hooked, and there is no need to increase the width of the hook 30, so the hook 30 is less likely to get in the way of work.

[0044] Furthermore, since the hook 30 according to this embodiment has a shape that is sharply bent in a roughly L-shape, it is possible to keep the tip position of the hook 30 as high as possible while avoiding interference with other operating members located at the grip end. In other words, it is possible to provide a portable power tool that does not worsen the operability of the tool even when the information display area is enlarged.

[0045] In this embodiment, the hook base 32 and the hook portion 36 intersect at an acute angle in a roughly L-shape at the bent portion 31. However, the hook base 32 and the hook portion 36 do not necessarily need to intersect at an acute angle. The same effect can be obtained if the extending direction of the hook base 32 and the extending direction of the hook portion 36 intersect at an acute angle to each other. For example, as shown in Figure 7, the tip of the hook base 32 can be slightly bent to provide a connecting tip portion 39, and the hook portion 36 can intersect at this connecting tip portion 39, so that the hook base 32 and the hook portion 36 intersect at a roughly right angle at the bent portion 31. In this way, if at least a part of the hook base 32 (preferably more than half of the total length of the hook base 32) extends diagonally in a direction that forms an acute angle with respect to the extending direction of the hook portion 36 when viewed from the left and right, it is possible to keep the tip position of the hook 30 as high as possible while avoiding interference with other operating members placed at the grip end.

[0046] Furthermore, in the embodiment described above, a driving tool 10 that operates using compressed air as power is used as an example, and therefore the pressure regulating operation unit 25 is given as an example of an operating member. However, even with an operating member other than the pressure regulating operation unit 25, the effect of keeping the tip position of the hook 30 as high as possible while avoiding interference with other operating members located at the grip end can be obtained. For example, when applying the present invention to a rechargeable tool with a detachable battery pack, the operating member such as the mode setting switch provided at the grip end, or the operating member operated when attaching or detaching the battery pack, may be replaced with the pressure regulating operation unit 25 according to the embodiment described above. Also, when applying the present invention to a gas-powered tool that operates using the combustion pressure of gas, the operating member operated when attaching or detaching the gas cartridge, or the operating member operated when attaching or detaching the battery pack, may be replaced with the pressure regulating operation unit 25 according to the embodiment described above. [Explanation of Symbols]

[0047] 10. Driving Tools (Portable Power Tools) 11 Grips 12 Output section 13 Nose section 13a Injection port 14 Magazines 15 Trigger 20 End Caps 21 Air supply pipe 22 Connection part 25 Pressure adjustment control unit 25a Rotation axis 25b Lever 30 hooks 31. Refractive section 32 Hook base 32a top surface 32b Bottom side 32c side 33 Wide section 34 Information display section 35 Hole 36 Hook part 38 Mounting part 38a Rotary shaft 38b Pinhole 39. Tip connection part 40 Fixed part W1: Thickness width of the wide section (width of the wide section in the shorter direction when viewed from the left or right direction) W2: Width of the wide section (width of the wide section in the shorter direction when viewed from above or below) W3 Thickness and width of the hook portion (width of the shorter side of the hook portion when viewed from the left or right direction) P1 Lowest position on the upper surface of the hook base P2 Highest position on the upper surface of the hook base P3 Lower end position of the lever on the pressure adjustment control section P4 Upper end position of the lever on the pressure adjustment control section P5 Upper end position of the air supply pipe

Claims

1. An output unit incorporating an operating mechanism that performs the fastening operation, A grip formed in a cylindrical shape so that it can be grasped by an operator and connected to the output section, A hanging hook is provided near the end of the grip that is not connected to the output section, when viewed in the extending direction of the grip, A portable power tool equipped with, The aforementioned hook is substantially L-shaped with a bent portion, and comprises a hook base portion on the grip side of the bent portion, and a hooking portion on the tip side of the bent portion. When viewed in the direction of extension of the hook portion, with the bent portion side facing upwards, the tip direction of the hook portion facing downwards, and the direction perpendicular to the vertical direction, with the bent portion side facing forwards, the opposite direction to the forward direction facing backwards, and the direction perpendicular to both the vertical direction and the front-to-back direction facing left and right, When viewed from the left and right directions, at least a portion of the hook base extends diagonally in a direction that forms an acute angle with respect to the extending direction of the hook portion. Portable power tools.

2. When viewed from the left and right directions, the upper surface of the hook base is gradually inclined upward as it moves forward. The portable power tool according to claim 1.

3. The end of the grip is provided with a pressure adjustment mechanism for adjusting the pressure of compressed air supplied from the outside, When the hook is viewed from the left-right direction, the pressure adjustment operating part is positioned above the lowest position on the upper surface of the hook base. A portable power tool according to either claim 1 or 2.

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