Sander pads and sanders

Abstract

To improve the convenience of a sander.SOLUTION: A pad for a sander includes a flat surface to which a sanding paper is attached. The pad further includes a side face having a first part in which an inclination angle with respect to the flat surface is a first angle, and a second part in which the inclination angle is a second angle smaller than the first angle.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pad for a sander and to a pad. [Background technology]

[0002] Sanders are a type of power tool that has been known for some time. The sander includes a motor and a pad that is driven by the motor. The pad has a flat surface for attaching sanding paper. Sanding can be performed by pressing the sanding paper attached to the flat surface against a workpiece.

[0003] Such sanders can be used under various conditions. For example, there may be a situation where the entire pad (sanding paper) should be used to sand a wide area of ​​the workpiece, and there may be a situation where only a part of the pad (sanding paper) should be used to sand a narrow and small area of ​​the workpiece. Since the desired pad shape changes depending on the conditions of use, users have traditionally used multiple types of sanders with different pad shapes depending on the conditions of use.

[0004] The use of such multiple types of sanders imposes a financial burden on the user. Therefore, the sander described in the following Patent Document 1 has been developed. This sander is provided with multiple attachments, each of which has multiple pads of different types. With this sander, the user can selectively attach an attachment having an appropriate pad depending on the conditions of use to perform sanding work. Therefore, there is no need to own multiple types of sanders with different pad shapes, and the financial burden on the user is reduced. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] US Patent Application Publication No. 2010 / 0048101 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the sander of Patent Document 1 leaves room for improvement in terms of convenience. For example, it is necessary to have multiple attachments, which makes their management cumbersome. Or, it is necessary to change the attachments depending on the conditions of use, which makes the work of changing the attachments cumbersome. For these reasons, it is desirable to provide a sander with improved convenience. [Means for solving the problem]

[0007] The present specification discloses a pad for a sander. The pad may have a flat surface for attaching sanding paper. The pad may further have a side having a first portion having an inclination angle with respect to the flat surface at a first angle and a second portion having an inclination angle with respect to the flat surface at a second angle less than the first angle.

[0008] According to the sander equipped with the pad of the above configuration, the user can selectively use the first and second parts of the pad (the area corresponding to the first and second parts of the sanding paper) according to the conditions of use for the sanding work. In other words, one sander can be used appropriately for a plurality of conditions of use. The first part is suitable for sanding a small area to be processed, for example. When sanding by pressing only the small area of ​​the pad against the workpiece, the reaction force of the force of the user pressing the pad against the workpiece acts intensively on a small area of ​​the corner. However, if sanding is performed in the part of the pad where the first part, which has a relatively large inclination angle and a relatively high rigidity, is formed, even if such a concentrated reaction force acts, the reaction force can be sufficiently withstood and sanding can be performed appropriately. The second part is suitable for sanding a workpiece area (for example, a gap between the workpiece and a hinge attached to the workpiece) where the pad's entry height (the distance in the direction perpendicular to the workpiece surface) is limited. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a sander according to one embodiment. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 3 is a vertical cross-sectional view of the sander taken along line AA in FIG. 2. [Diagram 5] FIG. 5 is a partially enlarged view of FIG. [Figure 6] FIG. 3 is a partial vertical cross-sectional view of the sander taken along line BB in FIG. 2. [Figure 7] FIG. [Figure 8] FIG. 2 is a cross-sectional view at the center of the dust bag. [Figure 9] FIG. 2 is a vertical cross-sectional view taken at the center of the dust bag. [Figure 10] FIG. 2 is a perspective view of a frame of the dust bag. [Figure 11]FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Representative and non-limiting examples of the present invention will now be described in detail with reference to the drawings. This detailed description is intended simply to provide those skilled in the art with details for implementing preferred examples of the present invention, and is not intended to limit the scope of the present invention. In addition, the additional features and inventions disclosed below can be used separately or together with other features and inventions to provide further improved devices, methods of making and using the same.

[0011] Furthermore, the combinations of features and steps disclosed in the following detailed description are not essential to the practice of the invention in its broadest sense, but are specifically described only to illustrate representative embodiments of the invention. Furthermore, the various features of the representative embodiments described above and below, and the various features of those described in the independent and dependent claims, do not have to be combined in the exact embodiments described herein, or in the exact order listed, to provide additional and useful embodiments of the invention.

[0012] All features described in the specification and / or claims are intended to be disclosed individually and independently of one another as limitations to the original disclosure and claimed particulars, apart from any configuration of the features described in the embodiments and / or claims. Furthermore, all numerical ranges and group or aggregate descriptions are intended to disclose their intermediate configurations as limitations to the original disclosure and claimed particulars.

[0013] In one or more embodiments, the pad may have a generally triangular shape when viewed in a direction perpendicular to the flat surface. The first portion may be formed at at least one of three corners including three vertices of the generally triangle. With this configuration, even when sanding a narrow processed area of ​​a workpiece, the corner where the first portion is formed can be easily inserted into the processed area.

[0014] In one or more embodiments, the pad may have a generally triangular shape having two relatively long sides and one relatively short side when viewed in a direction perpendicular to the flat surface. The first portion may be formed at least at a corner including a vertex between the two relatively long sides. Typically, a pad having a generally triangular shape having two relatively long sides and one relatively short side is attached to the sander such that a corner including a vertex between the two relatively long sides is located at the tip of the sander when viewed in a direction perpendicular to the flat surface. Therefore, according to this configuration, it is easy to sand a narrow and small area to be processed of the workpiece using the corner located at the tip of the sander where the first portion is formed.

[0015] In one or more embodiments, the first portion may be formed at a corner having an angle of 90 degrees or less when viewed in a direction perpendicular to the flat surface. With this configuration, the angle of the corner at which the first portion is formed is relatively small, making it easier to insert the corner into a narrow processed region of the workpiece.

[0016] In one or more embodiments, the second portion may be formed on at least one of three side edges located between the three corners. With this configuration, the second portion can be inserted into a workpiece area having a limited pad insertion height to perform sanding. Moreover, the side edges have an elongated shape, allowing efficient sanding of a wide area.

[0017] In one or more embodiments, the side surface may include a transition portion connecting the first portion and the second portion such that the inclination angle changes gradually from the first angle to the second angle. This configuration can reduce localized stress concentrations in the pad compared to a structure in which the inclination angle changes suddenly from the first angle to the second angle, thereby improving the strength of the pad.

[0018] In one or more embodiments, the ratio L / H may be 0.5 or more and 2.5 or less, where H is the thickness of the pad in a direction perpendicular to the flat surface, and L is the protruding distance of the tip of the inclination of the second portion relative to the base end of the inclination as viewed in the direction perpendicular to the flat surface. With this configuration, the second portion can easily enter a processed area where the pad's entry height is limited, making it easy to sand the processed area.

[0019] In one or more embodiments, a sander may be provided that includes any of the pads described above, which provides similar benefits to any of the pads described above.

[0020] In one or more embodiments, a sander may be provided. The sander may include any of the pads described above, a motor, and a base having a shape and size corresponding to the outline of the pad and smaller than the pad when viewed in a direction perpendicular to the flat surface, coupled to a portion of the pad opposite the flat surface, and configured to perform a sanding motion together with the pad by the driving force of the motor. The base may have a side surface that is inclined in the same direction as the side surface of the pad at least in a portion corresponding to the second portion. With this configuration, the second portion can be inserted deeper into a processing area where the insertion height of the pad is limited.

[0021] In one or more embodiments, the inclination angle of the side surface of the pad may be smaller than the inclination angle of the side surface of the base relative to the flat surface, which allows the second portion to more easily enter the processing area having a limited pad entry height.

[0022] Hereinafter, an orbital sander (hereinafter, simply referred to as a sander) 10 according to an exemplary embodiment will be described in more detail with reference to the drawings. The sander 10 illustrated in this embodiment is also called a finishing sander. The sander 10 is also called a delta sander due to the shape of the pad 31 described later.

[0023] 4 and 5, the sander 10 includes an electric motor 60, a motor shaft 61, and a tool accessory 30. One end of the motor shaft 61 is connected to the tool accessory 30 via another member. As will be described in detail later, the sander 10 is configured such that the tool accessory 30 performs a sanding motion by the rotation of the electric motor 60 (motor shaft 61).

[0024] In the following description, the direction in which the motor shaft 61 extends is defined as the up-down direction of the sander 10. In the up-down direction, the side where the tool accessory 30 is located is defined as the lower side, and the opposite side is defined as the upper side. In addition, the longitudinal direction of the sander 10 perpendicular to the up-down direction is defined as the front-rear direction of the sander 10. In the front-rear direction, the side where the tool accessory 30 is located is defined as the front side, and the opposite side is defined as the rear side. In addition, the direction perpendicular to the front-rear direction and the up-down direction is defined as the left-right direction of the sander 10. In the left-right direction, the right side when viewed from the rear side to the front side is defined as the right side of the sander 10, and the opposite side is defined as the left side of the sander 10.

[0025] As shown in FIGS. 1 to 3, the sander 10 includes a housing 20. The housing 20 includes a front housing portion 21, a grip portion 22, and a rear housing portion 23. The front housing portion 21 and the rear housing portion 23 are connected in the front-rear direction by a bifurcated shape that is spaced apart vertically, and the upper connecting portion functions as the grip portion 22. A connector 24 that can be attached to and detached from the rear housing portion 23 is disposed at the rear end of the rear housing portion 23. A power cord 26 for supplying power to the electric motor 60 extends rearward from the connector 24. In this embodiment, the power cord 26 is connected to a battery holster (not shown) in which a battery (not shown) can be attached. However, instead of the connector 24 and the power cord 26, a power cord or a power cable for supplying commercial power may extend from the rear housing portion 23. Alternatively, the sander 10 may include a battery attachment portion for attaching a battery.

[0026] As shown in Fig. 4, a controller 65 is accommodated in the lower part of the rear housing part 23. The controller 65 is electrically connected to the power cord 26 and the electric motor 60, and controls the operation of the electric motor 60 by controlling the power supplied to the electric motor 60. As shown in Figs. 2 and 4, a switch button 27 is provided in the front part of the front housing part 21 for performing an operation for starting and stopping the electric motor 60. A switch unit 48 is arranged behind the switch button 27 so as to be able to cooperate with it. The switch unit 48 is electrically connected to the controller 65.

[0027] 4 and 5, an electric motor 60 is housed in the front housing portion 21. A motor shaft 61 of the electric motor 60 extends in the vertical direction and is rotatably supported by bearings 62 and 63 fixed to the front housing portion 21. The bearing 62 supports the upper end of the motor shaft 61, and the bearing 63 supports the motor shaft 61 near its lower end.

[0028] The dust collection fan 50 is fixed to the lower end of the motor shaft 61 so as to surround the motor shaft 61 in the circumferential direction. As shown in Fig. 5, the dust collection fan 50 includes a substantially disk-shaped face plate 51, a shaft portion 52, and a plurality of blades 53. The shaft portion 52 protrudes cylindrically downward from the face plate 51 near the center of the face plate 51. The shaft portion 52 is rotatably supported by a bearing 64 in an eccentric state with respect to the motor shaft 61.

[0029] As shown in Fig. 4, the accommodation space of the dust collection fan 50 communicates with the dust collection nozzle 29 via a dust collection passage 28 extending in the front-rear direction in the lower part of the rear housing part 23. The dust collection nozzle 29 extends cylindrically rearward from the lower and rear edge of the rear housing part 23. As shown in Fig. 2, the connector 24 is located above the dust collection nozzle 29. A dust bag 100 (see Fig. 7) is removably attached to the dust collection nozzle 29.

[0030] As shown in Figs. 1 and 3, the tool accessory 30 is located at the bottom of the sander 10, and includes a pad 31 and a base 32. The pad 31 includes a flat surface 33 for attaching sanding paper (not shown). The flat surface 33 is the bottom surface of the pad 31, and extends in the horizontal direction (the direction perpendicular to the vertical direction). The base 32 is disposed on the pad 31 (more specifically, on the portion of the pad 31 opposite the flat surface 33). The pad 31 and the base 32 are connected by a bolt (not shown) extending in the vertical direction.

[0031] As shown in FIG. 1 and FIG. 2, in this embodiment, the pad 31 has an approximately triangular shape like an iron when viewed in the up-down direction. More specifically, the approximately triangular shape of the pad 31 is an approximately isosceles triangle having two relatively long sides and one relatively short side extending generally in the left-right direction. Three corners of the pad 31, each including three vertices of the approximately triangular shape, are also called corners 34 to 36. The corner 34 is a corner including a vertex between two relatively long sides, and is located at the frontmost side of the corners 34 to 36. The corner 34 has an angle of 90 degrees or less. The part of the pad 31 located between the corners 34 and 35 is also called a side edge 37. The part of the pad 31 located between the corners 34 and 36 is also called a side edge 38. The part of the pad 31 located between the corners 34 and 35 is also called a side edge 39. The base 32 has a shape and size that corresponds to the outer shape of the pad 31 and is slightly smaller than the pad 31 when viewed in the up-down direction.

[0032] As shown in FIG. 1, FIG. 2, FIG. 5, and FIG. 6, the side surface of the pad 31 has a different inclination angle with respect to the flat surface 33 depending on the location. Specifically, the inclination angle of the first portion 40, which is the side surface of the corner 34, is a first angle θ1 (see FIG. 5). The inclination angle of the second portion 41, which is adjacent to the corner 35, of the side surface of the side edge portion 37, is a second angle θ2 (see FIG. 6). Similarly, the inclination angle of the second portion 41, which is adjacent to the corner 36, of the side surface of the side edge portion 38, is a second angle θ2 (see FIG. 6). In this embodiment, the first angle θ1 is about 80°, and the second angle θ2 is about 35°. However, the first angle θ1 and the second angle θ2 can be set arbitrarily as long as they satisfy 90°≧θ1>θ2>0°. At each of the side edges 37 and 38, a transition section 42 is located between the first section 40 and the second section 41. Each of the transition sections 42 connects the first section 40 and the second section 41 such that the inclination angle of the side of the pad 31 gradually changes from a first angle θ1 to a second angle θ2.

[0033] In this embodiment, as shown in FIG. 6, the vertical thickness of the pad 31 is defined as H, and the protruding distance of the tip 46 of the inclination of the second portion 41 relative to the base end 45 is defined as L, and the ratio L / H is set to any value greater than or equal to 0.5 and less than or equal to 2.5.

[0034] 1, 2 and 6, in this embodiment, the side surface 47 of the base 32 is inclined in the same direction as the pad 31 at least in a portion corresponding to the second portion 41. In this embodiment, the inclination angle of the side surface 47 changes in accordance with the change in the inclination angle from the first portion 40 to the second portion 41 of the side surface of the pad 31. Also, in this embodiment, the inclination angle of the second portion 41 of the pad 31 is smaller than the inclination angle of the side surface 47 of the base 32.

[0035] As shown in Figs. 4 and 5, a plurality of through holes 43 are formed in the bottom surface of the pad 31, penetrating the pad 31 in the vertical direction. A space 44 (see Fig. 5) communicating with the through holes 43 is formed between the pad 31 and the base 32. This space 44 communicates with the dust collection passage 28. The sanding paper attached to the bottom surface of the pad 31 has holes formed at positions corresponding to the through holes 43 of the pad 31. When the dust collection fan 50 rotates with the rotation of the motor shaft 61, air flows into the dust bag 100 through the holes in the sanding paper, the through holes 43, the space 44, and the dust collection passage 28. This air flow allows the dust generated by sanding to be collected in the dust bag 100.

[0036] 5, a bearing 64 that supports the shaft portion 52 of the dust collection fan 50 is fixed to the tool accessory 30. Therefore, the tool accessory 30 is connected to the motor shaft 61 via the bearing 64 and the dust collection fan 50. The tool accessory 30 is further operably connected to the front housing portion 21 via feet 66 that extend in the vertical direction. The feet 66 are disposed at the front and rear of the front housing portion 21.

[0037] The sander 10 described above operates as follows. First, when a user operates the switch button 27 to drive the electric motor 60, the motor shaft 61 starts to rotate. Here, as described above, the bearing 64 connecting the motor shaft 61 and the tool accessory 30 and the shaft portion 52 of the dust collection fan 50 are eccentric with respect to the motor shaft 61. Therefore, when the motor shaft 61 rotates, the tool accessory 30 performs an eccentric circular motion (orbital motion) while tilting the foot 66. That is, the tool accessory 30 does not rotate by itself, but moves in a circular motion along a horizontal plane while maintaining its posture. In this state, when the sanding paper attached to the flat surface 33 of the pad 31 is pressed against the workpiece, sanding is performed.

[0038] According to the sander 10 described above, a user can selectively use the first portion 40 and the second portion 41 of the pad 31, which have different inclination angles, depending on the conditions of use for the sanding work (in other words, depending on what area of ​​the workpiece is being sanded).

[0039] For example, when sanding a narrow and small work area, the user may press only the corner 34 where the first portion 40 is formed against the work area to perform sanding. The first portion 40 has a relatively large inclination angle and a relatively high rigidity, so that even if sanding is performed by pressing only a small area of ​​the pad 31 against the work piece and a concentrated reaction force acts only on a part of the pad 31, the pad 31 can sufficiently withstand the reaction force. Moreover, since the first portion 40 is formed at the corner 34, even when sanding a narrow work area of ​​the work piece, it is easy to insert the part where the first portion 40 is formed (i.e., the corner 34) into the work area. In particular, since the corner 34 is located at the tip of the triangular pad 31, it is easy to insert the corner 34 into the narrow work area of ​​the work piece. Moreover, since the corner 34 has an angle of 90° or less in a plan view, it is easy to insert the corner 34 into the narrow work area of ​​the work piece.

[0040] Alternatively, when sanding a work area in which the entry height of the pad 31 (the distance in the direction perpendicular to the work surface) is limited (for example, a gap between a hinge attached to the work piece and the work piece), the user may press only the side edge 37 on which the second portion 41 is formed (or the side edge 37 on which the transition portion 42 and the second portion 41 are formed) against the work area to perform sanding. The second portion 41 has a relatively small inclination angle, so that the pad 31 can enter the work area in which the entry height is limited. In particular, the second portion 41 is formed on the side edges 37, 38 between the corner portion 34 and the corner portions 35, 36, so that a wide range can be efficiently sanded. Moreover, since sanding can be performed while moving the housing 20 in the direction in which the grip portion 22 extends with the second portion 41 entered into the work area in which the entry height of the pad 31 is limited, the sanding work can be performed with a natural arm orientation and movement. In particular, since the second portion 41 has a ratio L / H of 0.5 or more and 2.5 or less, the second portion 41 can easily enter the processing area where the entry height of the pad 31 is limited. Furthermore, in addition to the pad 31, the side surface 47 of the base 32 is also inclined in the same direction as the pad 31, so the second portion 41 can enter deeper into the processing area where the entry height of the pad 31 is limited. Furthermore, the inclination angle of the second portion 41 of the pad 31 is smaller than the inclination angle of the side surface 47 of the base 32, so the second portion 41 can enter more easily.

[0041] Furthermore, according to the sander 10, the transition portion 42 is formed between the first portion 40 and the second portion 41 of the pad 31, so that local stress concentration in the pad 31 can be suppressed, thereby improving the strength of the pad 31. Similarly, the inclination angle of the side surface 47 of the base 32 also gradually changes, so that the strength of the base 32 can be improved.

[0042] Hereinafter, the configuration of the dust bag 100 that is detachably attached to the dust collection nozzle 29 will be described with reference to Figs. 7 to 11. The directions in Figs. 7 to 11 indicate the directions when the dust bag 100 is attached to the dust collection nozzle 29. As shown in Fig. 7, the dust bag 100 includes a bag body 110, a connector 120, and a frame 130. The bag body 110 is made of cloth. The connector 120 is a part for detachably connecting to the dust collection nozzle 29 of the sander 10, and has an outer shape of a substantially rectangular parallelepiped in this embodiment. The connector 120 has a through hole 121 that opens toward the first direction D1. The through hole 121 communicates with the inside of the bag body 110. The through hole 121 has a size and shape that fits into the dust collection nozzle 29.

[0043] When the dust bag 100 is attached to the dust collection nozzle 29, the first direction D1 is also the direction in which the dust collection nozzle 29 opens, as shown in FIG. 3. That is, the first direction D1 is a direction that is slightly inclined upward from the front side to the rear side with respect to the front-rear direction. As shown in FIG. 7, in this embodiment, the bag body 110 is maintained in a substantially rectangular cube in cross section in a direction perpendicular to the first direction D1 by the frame 130 disposed inside the bag body 110. In the following description, the longitudinal direction of the rectangle is also referred to as the third direction D3, and the lateral direction of the rectangle is also referred to as the second direction D2. The second direction D2 is a direction that is slightly inclined forward from the bottom side to the top side with respect to the up-down direction. The third direction D3 coincides with the left-right direction.

[0044] According to the bag body 110 having such a shape, the bag body 110 can be made compact in the vertical direction. As a result, the sander 10 can be made compact in the vertical direction when the bag body 110 is worn. In particular, in this embodiment, when the bag body 110 is worn, the power cord 26 extends above the bag body 110, but the bag body 110 has a shape in which the width in the second direction D2 is relatively small, so that the sander 10 can be made compact in the vertical direction while avoiding interference between the power cord 26 and the bag body 110.

[0045] As shown in FIG. 10, the frame 130 includes a plurality of (10 in the illustrated example) inflexible parts 131, a plurality of (4 in the illustrated example) inflexible parts 133, and a plurality of (16 in the illustrated example) flexible parts 134. Each of the inflexible parts 131 extends in a second direction D2 perpendicular to the first direction D1 so as not to have flexibility in the first direction D1. In this embodiment, the five inflexible parts 131 are arranged spaced apart from the other five inflexible parts 131 in the left-right direction (third direction D3 perpendicular to the first direction D1). The inflexible part 131 arranged on the left side is also referred to as a first-side inflexible part 131a. The inflexible part 131 arranged on the right side is also referred to as a second-side inflexible part 131b. The five first-side inflexible portions 131a are arranged at intervals in the first direction D1. Similarly, the five second-side inflexible portions 131b are arranged at intervals in the first direction D1. In this embodiment, the first-side inflexible portions 131a and the second-side inflexible portions 131b are arranged at the same position in the first direction D1, but may be arranged at different positions.

[0046] The upper and lower ends of the first-side inflexible portion 131a located at the most front side and the upper and lower ends of the second-side inflexible portion 131b located at the most front side are connected to each other by two inflexible portions 133 extending in a third direction D3 perpendicular to the first direction D1. Similarly, the upper and lower ends of the first-side inflexible portion 131a located at the most rear side and the upper and lower ends of the second-side inflexible portion 131b located at the most rear side are connected to each other by two inflexible portions 133 extending in the third direction D3.

[0047] The flexible portion 134 is connected to the non-flexible portion 131 and extends in a direction intersecting the first direction D1 and the second direction D2 so as to have flexibility in the first direction D1. In this embodiment, the non-flexible portion 131 and the flexible portion 134 are alternately arranged along the first direction D1. In this embodiment, the flexible portion 134 includes a first-side flexible portion 134a arranged on the left side and connected to the first-side non-flexible portion 131a, and a second-side flexible portion 134b arranged on the right side and connected to the second-side non-flexible portion 131b.

[0048] In this embodiment, each of the flexible parts 134 has a triangular pulse shape (in other words, a V-shape). Specifically, the first-side flexible part 134a located on the left side extends from one first-side inflexible part 131a to the right side (toward the side where the second-side inflexible part 131b is located), turns back in a V-shape, and extends to the adjacent first-side inflexible part 131a. The second-side flexible part 134b located on the right side extends from one second-side inflexible part 131b to the left side (toward the side where the first-side inflexible part 131a is located), turns back in a V-shape, and extends to the adjacent second-side inflexible part 131b. The shape of the flexible part 134 can be modified to any pulse shape (for example, a circular arc-shaped pulse, a sawtooth-shaped pulse, etc.).

[0049] The first-side flexible portion 134a includes a first-side flexible portion 134a disposed on the upper side and connected to the upper end of the first-side non-flexible portion 131a, and a first-side flexible portion 134a disposed on the lower side and connected to the lower end of the first-side non-flexible portion 131a. Similarly, the second-side flexible portion 134b includes a second-side flexible portion 134b disposed on the upper side and connected to the upper end of the second-side non-flexible portion 131b, and a second-side flexible portion 134b disposed on the lower side and connected to the lower end of the second-side non-flexible portion 131b.

[0050] In this embodiment, the first side flexible portion 134a and the second side flexible portion 134b are connected to each other. Specifically, the first side flexible portion 134a has a first leading edge portion 136 located at the leading end of its pulse shape (the apex of the V shape). Similarly, the second side flexible portion 134b has a second leading edge portion 137 located at the leading end of its pulse shape. The first leading edge portion 136 and the second leading edge portion 137 are connected in a third direction D3 (in other words, the direction in which the first side non-flexible portion 131a and the second side non-flexible portion 131b are separated from each other).

[0051] A cylindrical fitting portion 138 protrudes forward in the first direction D1 from the frontmost non-flexible portion 131 and the front non-flexible portion 133. As shown in FIG. 8, the fitting portion 138 is fitted into the connector 120 and screwed to the connector 120 in this state. As a result, the frame 130 is coupled to the connector 120. In addition, in this coupled state, as shown in FIG. 8 and FIG. 9, the front edge of the bag body 110 is fitted into the outer periphery of the rear edge of the connector 120, and the band 111 is attached so as to surround the bag body 110 in the circumferential direction (the second direction D2 and the third direction D3). As a result, the bag body 110 is tightened inward by the band 111, and the bag body 110 is coupled to the connector 120 and the frame 130.

[0052] At this time, the first side inflexible portion 131a and the second side inflexible portion 131b abut against the inner surface of the bag body 110 to provide the bag body 110 with outward tension in the left-right direction. This maintains the width of the bag body 110 in the third direction D3 at the distance between the first side inflexible portion 131a and the second side inflexible portion 131b. As shown in FIG. 9, the inflexible portion 131 extends over most of the width of the bag body 110 in the second direction D2, so that the width of the bag body 110 in the second direction D2 is not significantly reduced by the loosening or bending of the bag body 110. Therefore, the frame 130 can maintain the outer shape of the bag body 110 to be a substantially rectangular parallelepiped as shown in FIG. 7. Therefore, the bag body 110 does not loosen during sanding work and get in the way of the user.

[0053] In this embodiment, the frame 130 having the above-described structure is made of synthetic resin. Therefore, even if the frame 130 has a relatively complicated structure as described above, the frame 130 can be easily manufactured. In addition, the frame 130 can be made lighter. However, the frame 130 can be manufactured from any material. Furthermore, in this embodiment, the frame 130 is an integrally formed member. Therefore, the number of steps required to manufacture the frame 130 can be reduced. However, the frame 130 may be manufactured by gluing or mechanically joining two or more parts.

[0054] According to the above-mentioned dust bag 100, when an external force in the first direction D1 is applied to the frame 130, the non-flexible portion 131 is bent, so that the frame 130 can expand and contract in the first direction D1. Therefore, when the user removes the dust bag 100 from the dust collection nozzle 29 and discharges the dust accumulated in the dust bag 100, the user can push the bag body 110 in the first direction D1 by hand to expand and contract the bag body 110 together with the frame 130. This makes it easier to discharge the dust adhering to the inner surface of the bag body 110 from the through hole 121. In contrast to a coil spring, the frame 130 can provide a function of expansion and contraction in the first direction D1 while maintaining the outer shape of the bag body 110 as a substantially rectangular parallelepiped.

[0055] Moreover, in this embodiment, as shown in FIG. 11, the overall width of the flexible portion 134 in the first direction D1 (L21+L22+L23+L24 in the figure) is equal to or greater than the overall width of the non-flexible portion 131 in the first direction D1 (L31+L32+L33+L34 in the figure). Therefore, sufficient stretchability of the frame 130 and the bag body 110 is provided, and dust discharge performance is improved. Each of L31 to L34 may be greater than the thickness of the flexible portion 134, as in the example shown in FIG. 11. In this way, the non-flexible portions 131 come into contact with each other in the first direction D1 before the flexible portion 134 is bent to its limit, so that even if a user unintentionally applies a large force in the first direction D1, damage to the frame 130 (flexible portion 134) can be prevented.

[0056] Furthermore, according to the dust bag 100, the non-flexible portions 131 and the flexible portions 134 are alternately connected along the first direction D1. Therefore, compared to a frame having only a single flexible portion having a width in the first direction D1 equivalent to the total width of the multiple flexible portions 134 in the first direction D1, the amount of bending per flexible portion 134 is smaller, and this allows the frame 130 and the bag body 110 to expand and contract more stably (in other words, expand and contract while more stably maintaining the shape of the cross section perpendicular to the first direction D1).

[0057] Furthermore, according to the dust bag 100, the flexible portion 134 has a pulse shape, which allows the frame 130 and the bag body 110 to expand and contract more stably. The flexible portion 134 includes a first side flexible portion 134a having a pulse shape and a second side flexible portion 134b having a pulse shape in the opposite direction. The first side flexible portion 134a and the second side flexible portion 134b are connected to each other. These points also contribute to the frame 130 and the bag body 110 to expand and contract more stably.

[0058] Furthermore, according to the dust bag 100, the first leading edge 136 of the first side flexible portion 134a and the second leading edge 137 of the second side flexible portion 134b are connected in the third direction D3, so that the connecting portion between the first side flexible portion 134a and the second side flexible portion 134b can be minimized. Therefore, it is possible to prevent the connecting portion from reducing the flexibility of the flexible portion 134 (the first side flexible portion 134a and the second side flexible portion 134b). In addition, the amount of material used for the frame 130 can also be reduced.

[0059] Although the embodiment of the present invention has been described above, the above-mentioned embodiment is for facilitating understanding of the present invention and does not limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and the present invention includes equivalents thereof. In addition, any combination or omission of each element described in the claims and specification is possible within the scope of solving at least a part of the above-mentioned problems or achieving at least a part of the effects.

[0060] For example, the first portion 40 having the inclination angle of the first angle θ1 and the second portion 41 having the inclination angle of the second angle θ2 may be formed at any location on the outer periphery of the pad 31. The number of the first portions 40 and the second portions 41 may also be set arbitrarily. For example, instead of or in addition to the corner 34, the first portion 40 may be formed at the corner 35 and / or the corner 36. Alternatively, the first portion 40 may be formed at the side edge 37 and / or the side edge 38. Alternatively, the second portion 41 may be formed at at least one of the corners 34 to 36.

[0061] Furthermore, the pad 31 is not limited to a substantially triangular shape like the above-mentioned iron, and may be modified into any shape. For example, the shape of the pad 31 may be a substantially equilateral triangle or a rectangle when viewed from the top to bottom. In these cases, the positions where the first portion 40 and the second portion 41 are formed may be set as desired.

[0062] Furthermore, the shape of the frame 130 described above is merely an example, and the number, shape, layout, and the like of the non-flexible portion 131 and the flexible portion 134 can be changed arbitrarily as long as at least one flexible portion 134 can provide flexibility in the first direction D1 by extending in a direction intersecting the first direction D1 and a direction perpendicular to the first direction D1, and as long as the at least one non-flexible portion 131 and the at least one flexible portion 134 can maintain the outer shape of the bag body 110. In addition, the outer shape of the bag body 110 is not limited to the above-mentioned approximately rectangular parallelepiped, and can be changed to any shape.

[0063] Furthermore, the above-described embodiments are not limited to orbital sanders, but are applicable to various types of sanders, including so-called multi-tools that have a sanding pad attached as an optional accessory.

[0064] The correspondence between each component of the above embodiment and each component of the present invention is shown below. However, each component of the embodiment is merely an example and does not limit each component of the present invention. The sander 10 is an example of a "sander". The pad 31 is an example of a "pad". The flat surface 33 is an example of a "flat surface". The first portion 40 is an example of a "first portion". The second portion 41 is an example of a "second portion". The corners 34, 35, and 36 are an example of "three corners". The side edge 37 is an example of a "side edge". The transition portion 42 is an example of a "transition portion". The electric motor 60 is an example of a "motor". The base 32 is an example of a "base". [Explanation of symbols]

[0065] 10... Sanda 20...Housing 21...Front housing part 22...Grip section 23...Rear housing section 24...Connector 26...Power cord 27...Switch button 28...Dust collection passage 29...Dust collection nozzle 30...Tool accessories 31...Pad 32...Base 33...Flat surface 34,35,36...Corner 37,38,39...side edge 40...First part 41...Second part 42...Transition section 43...Through hole 44...space 45...Proximal end 46...Tip 47...Side 48...Switch unit 50...Dust collection fan 51...face plate 52...Shaft 53...Feather 60...Electric motor 61...Motor shaft 62,63,64...Bearings 65...Controller 66...Foot 100...Dust bag 110...Bag body 111...Band 120...Connector 121...Through hole 130...frame 131...Inflexible part 131a...First side non-flexible part 131b...Second side non-flexible part 133...Inflexible part 134...Flexible part 134a...First side flexible part 134b...Second side flexible part 136...first leading edge 137...Second leading edge 138...Mating part D1...first direction D2...Second direction D3...Third direction θ1...first angle θ2...Second angle

Claims

1. A pad for a sander, A flat surface for attaching sanding paper; a side surface having a first portion having an inclination angle with respect to the flat surface of the first side surface and a second portion having an inclination angle with respect to the flat surface of the second side surface that is smaller than the first angle; Equipped pad.

2. 2. The pad according to claim 1, The pad has a substantially triangular outer shape when viewed in a direction perpendicular to the flat surface, The first portion is formed at least at one of three corners including three vertices of the approximate triangle. pad.

3. 3. The pad according to claim 2, The pad has a substantially triangular shape having two relatively long sides and one relatively short side when viewed in a direction perpendicular to the flat surface, The first portion is formed at least at a corner portion including a vertex between the two relatively long sides. pad.

4. The pad according to claim 2 or 3, The first portion is formed at a corner having an angle of 90 degrees or less when viewed in a direction perpendicular to the flat surface. pad.

5. The pad according to claim 2 or 3, The second portion is formed on at least one of the three side edges located between the three corners. pad.

6. A pad according to any one of claims 1 to 3, The side includes a transition portion connecting the first portion and the second portion such that the inclination angle changes gradually from the first angle to the second angle. pad.

7. A pad according to any one of claims 1 to 3, When the thickness of the pad in a direction perpendicular to the flat surface is defined as H, and the protruding distance of the tip of the inclination of the second portion from the base end of the inclination as viewed in the direction perpendicular to the flat surface is defined as L, the ratio L / H is 0.5 or more and 2.5 or less. pad.

8. Sanda, The pad according to any one of claims 1 to 3 is provided. Sanda.

9. Sanda, A pad according to any one of claims 1 to 3; A motor; a base having a shape and size corresponding to the outline of the pad and smaller than the pad when viewed in a direction perpendicular to the flat surface, the base being connected to a portion of the pad opposite the flat surface and configured to perform a sanding motion together with the pad by the driving force of a motor; Equipped with The base has a side surface that is inclined in the same direction as the side surface of the pad at least at a portion corresponding to the second portion. Sanda.

10. 10. The sander according to claim 9, The inclination angle of the side surface of the pad is smaller than the inclination angle of the side surface of the base with respect to the flat surface. Sanda.

Images