JPH08309653A - Driving gear for orbital sander, polishing member and orbital sander - Google Patents

Abstract

PURPOSE: To provide an orbital sander improved inworkability for replacing a polishing member relating to a base plate of a driving gear for the orbital sander. CONSTITUTION: A protruded part 52a and a single internal thread 53 are provided in a base plate 51 of a driving gear 50 for an orbital sander, on the other hand to form a recessed part 74 corresponding to the protruded part 52a in a polishing member 70, further to provide a single external thread 76 screwed to the internal thread 53, and in the case of mounting the polishing member 70 in the base plate 51, the protruded part 52a is engaged with the recessed part 74, further to screw the external thread 76 to the internal thread 53.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive unit for an orbital sander that causes a pad, to which abrasive paper is attached, to make a circular orbital motion, that is, an orbital motion by the rotation of an air motor, and more particularly to a drive unit for the orbital sander. And an orbital sander in which a polishing member is attached to the drive unit.

[0002]

2. Description of the Related Art For example, as a hand-held polishing device used for finishing and repairing automobile body skins, the polishing paper itself is revolved in a circular orbit without rotating.
A so-called orbital sander 1 having a structure as shown in FIG. 5 is known. Such a conventional orbital sander 1 has a polishing member 4 having a pad 3 to which a polishing paper 2 is attached, and a drive unit 5 for orbitally moving the polishing member 4.
The drive unit 5 is provided with a drive unit 7 for orbitally moving the base plate 6 on which the polishing member 4 is mounted. The drive unit 7 includes a known air motor 8 and a main body member to which the air motor 8 is attached and which also forms the main body of the orbital sander 1. When the operator presses the lever 9 pivotally attached to the head of the drive device 5, the valve 10 engaged with the lever 9 is opened and compressed air supplied from the outside to the air supply port 11 is supplied to the air motor 8. Supplied, and thereby the rotary shaft 1 of the air motor 8
2 is rotated. The compressed air that has passed through the air motor 8 is discharged from the exhaust port 14 to the outside.
Abrasive powder generated by polishing is sucked through the dust suction port 13 and discharged through the discharge port 14. A counterweight portion 15 having a recess 15a is formed at the output end of the rotary shaft 12. A drive shaft 16 having one end supported by the bearing 21 fitted in the recess 15a, extending in the same direction as the rotary shaft 12, and the other end fixed to the base plate 6 projects from the recess 15a. The axes of the rotary shaft 12 and the drive shaft 16 are displaced from each other by a distance d as shown in the figure, so that the rotary shaft 12 rotates to drive the drive shaft 16
Is an eccentric movement, that is, an orbital movement. Therefore drive shaft 1
The base plate 6 to which the other end of 6 is fixed is orbitally moved by the drive shaft 16. In addition, the base plate 6 is supported by the drive unit 7 by the columns 17 made of an elastic member.

[0003]

In the orbital sander configured as described above, the polishing member 4 is attached to the base plate 6.
As a method of attaching the same to the polishing member mounting surface 18 of the base plate 6 or the contact surface 19 of the polishing member 4 with the base plate 6, a method of applying an adhesive to the polishing member mounting surface 18 or abutting the polishing member mounting surface 18 A method of attaching a so-called Velcro (registered trademark) to the surface 19 and attaching it, or a method of using a screw 20 as shown in FIG. 15 to fix the surface is used. However, in the attachment method using the adhesive, the polishing member 4 and the base plate 6 are semi-permanently attached, and the shape of the polishing paper is determined by the shape of the polishing member 4 already attached, and one orbital sander is attached. When it is used, its use is limited. On the other hand, when the above-mentioned velcro tape is used, the polishing member 4 and the base plate 6 can be freely attached and detached, but since the base plate 6 makes an orbital motion, a force acts on the polishing member 4 from various directions. Therefore, there is a drawback that the polishing member 4 is easily separated from the base plate 6 during use. Considering these points, the method of screwing is considered to be the best, but conventionally, the polishing member 4 has been used.
The base plate 6 and the base plate 6 are fixed by a plurality of screws 20, typically four screws 20.

This point will be described in detail. That is, as described above, since the polishing member 4 makes an orbital motion, forces act on the polishing member 4 from various directions. Further, as shown in FIG. 16 and FIG. 5, in the orbital sander, the polishing member 4 generally has a rectangular planar shape instead of a circular shape. Such a square abrasive member,
Forces are applied from various directions as compared with a circular polishing member, and particularly when a force is applied to a corner portion of the polishing member, the force acting on the screw for fixing the polishing member 4 and the base plate 6 is increased, and the force is increased. Depending on the degree of engagement, loosening occurs in the locking of the screw. Further, in the orbital sander, the polishing member 4 itself is not a so-called self-rotating type in which the polishing member 4 rotates about the drive shaft 16, so it is necessary to prevent the rotation. From these facts, if the polishing member 4 and the base plate 6 are fixed with one screw, the force acting on the one screw becomes large, and the locking of the screw is apt to be loosened. In addition, when fixing with one screw, loosening occurs in the locking of the screw, and as shown in FIG. 16, if the polishing member 4 rotates with respect to the drive device 5 of the orbital sander as shown by the dotted line. Not only will the workability deteriorate, but the commercial value as an orbital sander will also decrease. Therefore, the polishing member 4 and the base plate 6 are fixed to each other by the plurality of screws 20, generally four screws 20, as described above. Therefore, when replacing the polishing member 4,
There is a problem in that workability is poor because it is necessary to remove or screw in the plurality of screws 20. In addition, there is a problem in that workability is poor because it is necessary to separately prepare a dedicated jig such as a hexagonal wrench for the work of screwing in the screws. The present invention has been made to solve such a problem, and an object thereof is to provide an orbital sander driving device, a polishing member, and an orbital sander, which have good workability in exchanging the polishing member with respect to the base plate. To do.

[0005]

The orbital sander drive device of the present invention is eccentric and rotatable with respect to a rotary shaft extending from a drive source provided in the drive section, and one end of which is provided on the rotary shaft. By the eccentric movement of the connected drive shaft about the axis of the rotary shaft due to the rotation of the rotary shaft,
A drive device for an orbital sander, which makes an orbital motion of a base plate supported by the drive unit via a strut made of an elastic member and fixed to the other end of the drive shaft, the polishing member for attaching the polishing member to the base plate. At least one polishing member rotation preventing convex portion or concave portion provided on the mounting surface, and a drive device side connecting portion connecting the base plate and the polishing member are provided.

The protrusion or recess for preventing rotation of the polishing member prevents the polishing member from rotating around the base plate when the polishing member is attached to the base plate. Further, the drive device side connecting portion connects the base plate and the polishing member at only one point since the polishing member rotation preventing convex portion or the concave portion prevents the polishing member from rotating. Thus, the drive device
Since the drive device side connecting portion is provided only at one place, it works to improve workability when exchanging the polishing member.

The polishing member of the present invention is used in the drive device for an orbital sander according to any one of claims 1 to 3, and is attached to a polishing member attachment surface of a base plate of the drive device. In a polishing member in which a polishing portion is provided facing a mounting portion that abuts against,
An orbital motion of the base plate is provided on the mounting portion and is formed corresponding to the convex portion or concave portion for preventing rotation of the polishing member of the base plate to engage with the convex portion or concave portion and the rotation of the rotary shaft. When the polishing member is rotated, a concave portion or a convex portion that prevents the polishing member from rotating and a polishing member side connection that is connected to the drive device side connection portion provided on the base plate for connecting the polishing member to the base plate. And a member.

When the polishing member is attached to the base plate of the drive unit for the orbital sander, the recess or protrusion engages with the protrusion or recess for preventing rotation of the polishing member provided on the base plate, so that the base plate Against this, the polishing member is prevented from rotating. Further, the polishing member side connecting member is connected to the drive device side connecting portion provided on the base plate, and connects the polishing member to the base plate. As described above, the polishing member is prevented from rotating on its own axis by preventing the rotation or rotation of the polishing member by engaging with the protrusion or the recess for preventing rotation of the polishing member provided on the base plate. Since it is connected to the base plate, it works to improve workability when exchanging the polishing member.

In the orbital sander of the present invention, the drive shaft, which is eccentrically and rotatably connected to the rotary shaft extending from the drive source provided in the drive unit and has one end connected to the rotary shaft, is rotated by the rotation of the rotary shaft. A drive device for an orbital sander that makes an orbital motion of a base plate that is supported by the drive unit via a strut made of an elastic member and is fixed to the other end of the drive shaft by performing an eccentric motion about the axis of the rotary shaft. In addition, at least one polishing member rotation preventing convex portion or concave portion provided on the polishing member mounting surface of the base plate to which the polishing member is mounted, and a drive unit side connecting portion connecting the base plate and the polishing member. And an orbital sander drive device, and an abrasive member mounting on a base plate of the orbital sander drive device used in the orbital sander drive device. A first polishing member attached to the first polishing member and provided with a polishing portion facing a first mounting portion abutting the polishing member mounting surface, the first polishing member being provided in the first mounting portion for preventing rotation of the polishing member. It is formed corresponding to the convex portion or the concave portion and engages with the convex portion or the concave portion,
And a recess or a protrusion that prevents the first polishing member from rotating when the base plate makes an orbital movement due to the rotation of the rotary shaft, and the drive shaft for connecting the first polishing member to the base plate. A first screw having a connecting portion at the head of the screw, and a through hole through which the first screw can be inserted from the polishing portion toward the first mounting portion An orbital sander including a polishing member, the second polishing member being attached to the base plate of the drive device in place of the first polishing member,
A second screw that is vertically installed with one end fixed to a second mounting portion facing the base plate, and that is screwed to the drive shaft to fix the second polishing member to the base plate; When a projection is provided on the polishing member mounting surface of the plate, a plate body having a thickness exceeding the amount of protrusion of the projection from the polishing member mounting surface and provided on the second mounting portion, and the second screw A jig that is erected on the other end of the first polishing member and is connected to the connection portion provided on the first screw of the first polishing member, and rotates the first screw to screw the first screw into the drive shaft. And a second polishing member having: and the first screw of the first polishing member is screwed onto the drive shaft of the drive unit to mount the first polishing member on the base plate of the drive unit. At this time, the jig for the second screw provided on the second polishing member is attached to the first jig. The first screw of the first polishing member is connected to the connecting portion of the first screw of the polishing member and the second polishing member is rotated about the second screw to rotate the first screw of the first polishing member of the orbital sander drive device. It is characterized in that it is screwed onto the drive shaft.

The second polishing member can be attached to the base plate instead of the first polishing member. Further, the jig provided in the second polishing member acts to connect the first screw provided in the first polishing member to the connecting portion of the first screw in a freely connectable manner and screw the first screw into the drive shaft. As described above, the second polishing member can be used as a polishing member, and when the first polishing member is attached to the orbital sander drive device, it also functions as an attachment assisting tool for the attachment. Thus, the orbital sander acts to improve workability when exchanging the polishing member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An orbital sander driving device, a polishing member, and an orbital sander according to an embodiment of the present invention will be described below with reference to the drawings. In each figure, the same constituent members are designated by the same reference numerals. First, the drive device for orbital sander will be described. As shown in FIG. 1, the basic structure of the orbital sander driving device 50 is the same as that of the orbital sander driving device 5 shown in FIG. Therefore, in FIG. 1, the same components as those shown in FIG. 15 are designated by the same reference numerals, and the description thereof will be omitted. Therefore, the characteristic portion of the drive device 50 for the orbital sander will be described below.

A base plate 51 corresponding to the base plate 6 shown in FIG. 15 is fixed to the other end of the drive shaft 16 and is supported by the drive unit 7 by a support 17 made of an elastic member. The support 17 is fixed to the base plate 51 by screwing, for example, a hexagon socket head bolt 52 from the polishing member mounting surface 51a side of the base plate 51 to the one end 17a side of the support 17. Therefore, the head portion 52 a of the hexagon socket head cap bolt 52 forms a convex portion that projects with respect to the polishing member attachment surface 51 a of the base plate 51. The head portion 52a thus protruding from the polishing member mounting surface 51a engages with a recess provided in the polishing member and prevents the polishing member from rotating, as will be described later.
In the drive unit 50 of this embodiment, since there are four columns 17, the head portion 52a of the hexagon socket head bolt 52 also protrudes from the polishing member attachment surface 51a at four locations as shown in FIG. In addition, the convex portion 5 protruding with respect to the polishing member mounting surface 51a
The number and location of 2a are not limited to four and the positions shown in the figure. As described above, at least one protrusion 52a may be provided for the purpose of preventing rotation of the polishing member.

Further, the convex portion formed on the polishing member mounting surface 51a is not limited to the head portion 52a, but may be a convex portion 56 integrally formed with the base plate 55 as shown in FIG. Good. In this case, as the screw 57 for fixing the support 17 and the base plate 55, a flat head screw whose head 57a does not protrude from the polishing member mounting surface 55a may be used.

Further, a drive device side connecting portion for connecting with a polishing member side connecting member provided on the polishing member is provided at an arbitrary position of the base plate 55, as will be described later. In this embodiment, a female screw 58 is formed as the drive device side connecting portion as shown in FIG. Although the position where the drive device side connecting portion is provided in the base plate 55 is arbitrary, it is preferably a position along the axis of the drive shaft 16 so that the orbital motion force of the base plate 55 is transmitted to the polishing member without unevenness. Further, as shown in FIG. 1, when the drive shaft 16 and the base plate 51 are fixed so that the other end 16a of the drive shaft 16 is flush with the polishing member mounting surface 51a of the base plate 51, Most preferably, the female screw 53 is formed in the drive shaft 16 along the axis of the drive shaft 16 as a drive device side connecting portion.

Instead of the various projections 52a and 56 described above, a recess 62 may be formed in the base plate 61 as in the orbital sander drive device 60 shown in FIG. In this case, the polishing member is formed with a projection corresponding to the recess 62 and engaging with the recess 62. A female screw 63 is formed on the base plate 61 as a driving device side connecting portion.

In the orbital sander drive device 50 or 60 thus constructed, the rotary shaft 12 is rotated by supplying compressed air to the air motor 8 as in the conventional orbital sander described above, and the drive shaft is thereby rotated. 16 makes an orbital motion, and the base plates 51 and 61 make an orbital motion accordingly. When attaching a polishing member to be described later to the base plates 51 and 61, the concave portions or convex portions formed on the polishing member are engaged with the convex portions 52a and the concave portions 62 formed on the base plates 51 and 61, and 1 The drive device side connecting portion and the polishing member side connecting member provided at the location may be connected. Therefore, when exchanging the polishing member, the orbital drive device of this embodiment does not need to remove and attach a plurality of screws as in the conventional case, and the workability when exchanging the polishing member can be improved.

Next, the polishing member will be described. The polishing member of this embodiment is the drive device 5 for the orbital sander described above.
It is attached to 0,60. The polishing member 70 shown in FIGS. 5 and 6 corresponds to the driving device 50 shown in FIGS.
54 has a rectangular planar shape substantially corresponding to the above-mentioned base plate 51, and has a polishing paper 71, a pad 72 which is a base for attaching the polishing paper 71, and the above-mentioned drive device 50. Reinforcement plate 73 that abuts the base plate 51
With. The reinforcing plate 73 corresponds to an example that functions as a mounting portion of the polishing member by contacting the polishing member mounting surface 51a of the base plate, and the polishing paper 71 corresponds to an example that functions as a polishing portion. Also, the reinforcing plate 7
3 and the pad 72 or the reinforcing plate 73 or the pad 72 only, the base plate 51 of the drive device 50, 54 described above,
A concave portion 74 that engages with the convex portions 52a and 56 is formed at a position corresponding to the convex portions 52a and 56 formed on 55. It is preferable that the convex portions 52a and 56 and the concave portion 74 are gently engaged with each other. When the recess 62 is formed in the base plate 61 as in the drive device 60 shown in FIG. 2, the position corresponding to the recess 62 as shown in the polishing member 90 shown in FIG. The polishing member 90 having the engaging convex portion 94 is used.

The structure of the polishing member 70 will be described as an example. The pad 72 is usually made of a rubber material. The reason why the rubber material is used is that it has some flexibility so that it can easily follow the shape of the surface of the object to be polished, and that a uniform load can be applied to the entire surface of the polishing paper 71. The reinforcing plate 73 provided on the entire surface 72a of the pad 72 is
Since the pad 72 has some flexibility, the base plates 51, 6 of the orbital sander driving devices 50, 60 are
It is provided in order to secure a mounting plane for No. 1 and to securely mount the polishing member 70. The material of the reinforcing plate 73 is plastic, metal, etc.,
The reinforcing plate 73 is attached to the pad 72 with an adhesive or the like.
The reinforcing plate 73 may not be used when the pad 72 has sufficient rigidity. The lower surface 72 of the pad 72 is configured so that the polishing paper 71 can be freely attached to and removed from the pad 72.
On the b and the back surface 71b of the polishing paper 71, for example, Velcro (registered trademark) 75 is attached to the bottom surface 72b and the back surface 71b with an adhesive or the like.

Further, in the polishing member 70, for example, the female screw 53 is provided at one position corresponding to the female screw 53 formed as the driving device side connecting portion on the driving shaft 16 provided in the driving device 50.
A male screw 76, which is an example of the male screw 76 that functions as a polishing member side connecting member, is housed in the cavity 72c in the pad 72. The tip portion 76a of the male screw 76 preferably slightly projects from the opening 73b formed in the contact surface 73a of the reinforcing plate 73. On the other hand, also in the polishing paper 71 and the magic tape 75, the screwdriver can be inserted so that, for example, the screwdriver can be connected to the connecting portion 79 formed on the head 76b of the male screw 76 for rotating the male screw 76. Through holes 77 are formed. This through hole 77
Communicate with the cavity 72c. A washer 78 is provided on the male screw 76 for smooth rotation of the male screw 76.
In addition, the opening 73b and the through hole 77 are connected to the head 76 of the male screw 76.
b cannot pass through. Further, it is preferable that the connecting portion 79 formed on the head portion 76b has a so-called minus or plus shape in a screwdriver, and particularly has a hexagonal hole shape. The polishing member 90 used in the drive device 60 also has the same structure as the polishing member 70.

The same applies to the driving devices 54 and 60, but the driving device 50 will be described as an example. In order to efficiently suck the polishing powder generated from the object polished by the polishing member 70 from the dust inlet 13, the base plate 51 has conventionally been provided with four side surfaces 80 of the polishing member 70 attached to the base plate 51. A skirt is attached so as to surround it. When such a skirt is provided, when the base plate 51 and the polishing member have substantially the same size in plan view, the polishing member has a shape as shown in FIG. 5, but is attached to the base plate 51. When the polishing member is large, a polishing member 95 having a protrusion 96 as shown in FIG. 7 is used. The protrusion 96 has a size corresponding to the base plate 51, and the protrusion 96 is housed in the skirt. Incidentally, the polishing member 95 is used for the base plate 5 like the drive unit 50, for example.
1 corresponds to the case where the convex portion 52a is provided,
A protrusion may be formed on the reinforcing plate 73 of the polishing member 95 corresponding to the case where the recess 62 is provided on the base plate 61.

In the above description of the polishing member 70 and the like, the polishing member of the type in which the polishing paper 71 is attached to the pad 72 is shown, but the present invention is not limited to this, that is, the pad itself has a polishing surface, that is, It may be a polishing member of a type in which the pad and the polishing paper are integrally formed. In this case, if the polishing surface becomes worn, the polishing member will be replaced. Further, in the above-mentioned polishing member, the polishing member 70
Although the screwing action of the screw is used to connect the base plate 51 and the like to the base plate 51 and the like, the present invention is not limited to this.

The case where the polishing member 70 having such a structure is attached to the orbital sander driving device 50 or 54 will be described by taking the driving device 50 as an example. Further, an orbital sander 200 in which a polishing member is attached to an orbital sander driving device will be described. As shown in FIG.
The concave portion 74 formed on the polishing member 70 and the convex portion 52a formed on the base plate 51 of the drive device 50 are engaged with each other, and the male screw 76 provided on the polishing member 70 and the drive shaft 16 on the drive device 50 side. The polishing member 70 is connected to the base plate 51 by screwing the female screw 53. Therefore, as the base plate 51 makes an orbital motion as described above, the polishing member 70 also makes an orbital motion together with the base plate 51. Therefore, the orbital sander 200 in which the polishing member 70 and the like are attached to the drive device 50 and the like polishes the object to be polished with the polishing paper 71. The same applies to the case where the polishing member 70 is attached to the drive unit 54 and the case where the polishing member 95 is attached to the drive unit 50 or 54. When the polishing member 90 is attached to the orbital sander driving device 60, as shown in FIG. 12, the concave portion 62 formed on the base plate 61 and the convex portion 9 formed on the reinforcing plate 73 of the polishing member 90 are used.
4 and the male screw 76 provided on the polishing member 90.
And a female screw 63 formed on the base plate 61 of the drive device 60.
The polishing member 90 is connected to the base plate 61 by screwing and.

As described above, according to the polishing members 70, 90 and 95, when the polishing members are attached to the base plates 51, 55 and 61, the convex portions 52 formed on the base plates 51, 55 and 61 are formed.
a, 56 and the concave portion 62 are engaged with the concave portion 74 or the convex portion 94 formed on the polishing member 70 or the like, and the female screws 53, 58 and 63 corresponding to the drive device side connecting portion provided at one place and the polishing member. It is sufficient to connect with one male screw 76 corresponding to the side connecting member. Therefore, when exchanging the polishing member 70 and the like,
In the polishing member and the orbital sander of this embodiment, it is not necessary to remove and attach a plurality of screws as in the conventional case, and workability at the time of exchanging the polishing member can be improved.

Also, the orbital sander 2 in this embodiment is used.
As shown in FIGS. 9 and 10, 00 can also include a polishing member 100 in which a reinforcing plate 73 is not provided with a concave portion or a convex portion. The polishing member 100 includes, in addition to the members such as the polishing paper 71 and the pad 72 included in the above-described polishing member 70, the reinforcing plate 73 with one end fixed to the above-described reinforcing plate 73.
A male screw 101 that is erected on the upper surface of the male screw 101, a jig 102 that is preferably a hexagonal wrench that is erected on the tip portion 101a of the male screw 101 along the axis of the male screw 101, and a contact surface 73a of the reinforcing plate 73. And the plate body 103 provided on the. Male screw 10
Reference numeral 1 denotes female screws 53, 6 formed on the base plate 58 or the drive shaft 16 in the orbital sander drive device 50 or the like.
3, and the polishing member 100 is screwed onto the base plate 51, 55, 6
It is for attaching to 1. The jig 102 is for connecting to the connecting portion 79 formed on the head portion 76b of the male screw 76 included in the above-mentioned polishing member 70, and connecting the jig 102 and the connecting portion 79. In this state, the jig 102, that is, the polishing member 100 is rotated about the axis of the male screw 101 to rotate the male screw 76 and screw it into the female screws 53 and 63. When the polishing member 100 is attached to a drive device having convex portions 52a and 56 on the base plates 51 and 55 like the drive devices 50 and 54 as an orbital sander drive device,
By engaging the male screw 101 with the female screws 53 and 58 and rotating the polishing member 100, the male screw 101 and the female screw 53,
58, but if the plate body 103 is not provided, when the male screw 101 enters the female screws 53 and 58, the convex portions 52a and 56 of the base plates 51 and 55 are reinforced.
Since it abuts against the abutment surface 73a of No. 3, the tightening force by the male screw 101 and the female screws 53, 58 becomes weak. Then the convex part 5
The plate body 103 having a thickness exceeding the amount of protrusion from the polishing member mounting surfaces 51a and 55a of the 2a and 56 is brought into contact with the contact surface 73.
By being provided in a, the upper surface 103a of the plate body 103 and the polishing member mounting surfaces 51a and 55a are brought into contact with each other to secure the tightening force.

Such a polishing member 100 has a reinforcing plate 73.
Since no concave portion or convex portion is provided on the base plate, the base plate of the drive device is easily rotated by the orbital motion. Therefore, the planar shape of the polishing member 100 is circular so that even if the polishing member 100 rotates, no deviation occurs as shown in FIG. 16 with respect to the rectangular base plate. Further, by making the plane shape circular, the male screw 101 screwed into the female screw is less likely to loosen than in the case of the rectangular shape. Further, the diameter of the polishing member 100 is selected to be an appropriate size so that the operator can easily rotate the contact polishing member 100 by hand.

As described above, and as shown in FIG. 13, in the polishing member 100, the male screw 101 of the polishing member 100 is changed to the female screw 53 of the driving device 50 or the female screw 58 of the driving devices 54 and 60. , 63 to rotate the polishing member 100 to turn the male screw 101 into the female screw 53,
By screwing with 58 and 63, it can be mounted on the orbital sander drive device 50 or the like as a polishing member. Further, as shown in FIG. 14, a case where the polishing member 100 is used to attach the polishing member 70 to the drive device 50 will be described. In this case, the polishing member 70 corresponds to the first polishing member and the polishing member 100 corresponds to the second polishing member. When the male screw 76 provided on the polishing member 70 is screwed onto the female screw 53 formed on the drive shaft 16 provided on the drive device 50, the jig 102, which is, for example, a hexagon wrench provided on the male screw 101 of the polishing member 100, is attached. By inserting the through hole 77 of the polishing member 70 and connecting to the connecting portion 79, which is, for example, a hexagonal hole formed in the head portion 76b of the male screw 76, the worker manually connects the polishing member 100 to connect. Jig 1
The male screw 76 can be screwed into the female screw 53 via the connector 02 and the connecting portion 79. Thus, the polishing member 100 is
The orbital sander drive unit 50 and the like have polishing members 70, 9
It can also be used as a jig for screwing the male screw 76 provided on these polishing members to the driving device 50 or the like when the 0, 95 are mounted. Therefore, when exchanging the polishing member 70 and the like, the polishing member and the orbital sander of this embodiment do not need to prepare a separate jig for attaching the polishing member to the driving device, and the workability can be improved.

The polishing member 100 is not limited to being used only in the orbital sander driving device 50 and the like described above. That is, not only the orbital sander, but also a member in another sander, which has a fixing member having a screw for screwing one end to a member corresponding to the drive shaft 16 or the base plate 51 described above, The above polishing member 10 can be applied to other polishing members attached to the sander.
0 can be applied to screw the one end of the fixing member of the other polishing member to the member on the sander side. Further, the polishing member 100 can be applied not only to the fixing member of the polishing member described above, but also to rotate a screw attached to the other sander.

[0028]

As described above in detail, according to the orbital sander drive device of the present invention, the base plate of the orbital sander drive device is provided with the convex portion or the concave portion for preventing rotation of the polishing member. When attaching the polishing member to
It is possible to prevent the polishing member from rotating with respect to the base plate. Further, since the polishing member rotation preventing convex portion or the concave portion can prevent the rotation of the polishing member, the driving device side connecting portion may be provided at only one place. Therefore, when exchanging the polishing member, it suffices to disconnect the drive unit side connecting portion at the above-mentioned one position, and the workability of exchanging the polishing member can be improved.

Further, according to the polishing member of the present invention, since the polishing member rotation preventing convex portion or concave portion provided on the base plate of the drive device for the orbital sander is engaged with the concave portion or convex portion. The concave portion or convex portion on the polishing member side can be engaged with the convex portion or concave portion for preventing rotation of the polishing member, and rotation of the polishing member with respect to the base plate can be prevented. Further, since the polishing member side connecting member that is connected to the drive device side connecting portion provided at one location of the base plate is provided, the polishing member can be connected to the base plate. As described above, the polishing member is prevented from rotating on its own axis by preventing the rotation or rotation of the polishing member by engaging with the protrusion or the recess for preventing rotation of the polishing member provided on the base plate. Since it is connected to the base plate, workability when exchanging the polishing member can be improved.

According to the orbital sander of the present invention,
The second polishing member can be attached to the base plate instead of the first polishing member. Further, since the second polishing member is provided with a jig that can be connected to the connecting portion of the first screw provided on the first polishing member, when the first polishing member is attached to the orbital sander drive device, By rotating the jig, the first screw of the first polishing member can be screwed onto the drive shaft of the drive device. Thus, the second
The polishing member can be used not only as a polishing member but also as an attachment aid for attaching the first polishing member to the orbital sander drive device. Therefore, the orbital sander can improve workability when replacing the polishing member.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration example of a drive device for an orbital sander that is an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing another configuration example of the drive device for an orbital sander which is an embodiment of the present invention.

FIG. 3 is a rear view of the base plate shown in FIG.

FIG. 4 is a cross-sectional view showing another configuration example of the drive device for an orbital sander which is an embodiment of the present invention.

FIG. 5 is a perspective view showing a polishing member according to an embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of the polishing member shown in FIG.

FIG. 7 is a perspective view showing another example of a polishing member that is an embodiment of the present invention.

FIG. 8 is a perspective view showing another example of the polishing member according to the embodiment of the present invention.

FIG. 9 is a perspective view showing yet another example of a polishing member that is an embodiment of the present invention.

10 is a side view including a partial cross section of the polishing member shown in FIG.

FIG. 11 is a cross-sectional view showing an orbital sander according to an embodiment of the present invention, in which the polishing member shown in FIG. 5 is attached to the drive unit shown in FIG.

12 is a cross-sectional view showing an orbital sander according to an embodiment of the present invention, in which the polishing member shown in FIG. 8 is attached to the drive unit shown in FIG.

13 is a cross-sectional view showing an orbital sander according to an embodiment of the present invention, in which the polishing member shown in FIG. 9 is attached to the drive unit shown in FIG.

14 is a cross-sectional view showing a state in which the polishing member shown in FIG. 9 is used as a jig when the polishing member shown in FIG. 5 is attached to the drive device shown in FIG. 1 in the orbital sander which is an embodiment of the present invention. Is.

FIG. 15 is a cross-sectional view showing a configuration of a conventional orbital sander.

FIG. 16 is a view showing a case where the mounting position of the polishing member is biased with respect to the orbital sander drive device.

[Explanation of symbols]

7 ... Drive part, 8 ... Air motor, 12 ... Rotating shaft, 16 ...
Drive shaft, 17 ... Struts, 50 ... Orbital sander drive device, 51 ... Base plate, 51a ... Polishing member mounting surface, 52a
... Convex part, 53 ... Female screw 54 ... Orbital sander drive device, 55 ... Base plate,
55a ... Polishing member mounting surface, 56 ... Convex portion, 58 ... Female screw,
60 ... Drive device for orbital sander, 61 ... Base plate,
62 ... Recessed portion, 63 ... Female screw, 70 ... Abrasive member, 71 ... Abrasive paper, 72 ... Pad, 73 ... Reinforcing plate, 74 ... Recessed portion, 76
... Male screw, 77 ... Through hole, 90 ... Polishing member, 94 ... Convex part, 100 ... Polishing member, 101 ... Male screw, 102 ... Jig, 103 ... Plate, 200 ... Orbital sander.

Claims (8)

[Claims] 1. A drive shaft (16) eccentrically and rotatably connected at its one end to a rotary shaft (12) extending from a drive source (8) provided in the drive part (7). A base that is supported by the drive unit and fixed to the other end of the drive shaft by way of an eccentric movement about the axis of the rotary shaft due to the rotation of the rotary shaft, through a support (17) made of an elastic member. An orbital sander driving device for orbitally moving a plate (51), comprising at least one polishing member rotation preventing projection or recess (52a, 52a, provided on a polishing member mounting surface (51a) of the base plate for mounting a polishing member. 62) and a drive device side connecting portion (53) for connecting the base plate and the polishing member, to provide a drive device for an orbital sander. 2. When a plurality of the projections or recesses are provided on the polishing member mounting surface, the projections or recesses are arranged at symmetrical positions about the axis of the drive shaft. Item 2. The drive device according to Item 1. 3. When the polishing member mounting surface is provided with a convex portion, the convex portion penetrates the base plate from the polishing member mounting surface and reaches one end of the support column so that one end of the support column is connected to the base plate. The drive device for an orbital sander according to claim 1 or 2, which is a fixing member (52) for fixing to the. 4. The orbital sander driving device according to claim 1, which is mounted on a polishing member mounting surface (51a) of a base plate of the driving device and which abuts on the polishing member mounting surface. Attached part (7
In a polishing member (70, 90) provided with a polishing portion (71) facing to 3), it is formed corresponding to the convex portion or concave portion of the base plate for preventing rotation of the polishing member provided in the mounting portion. A concave portion or a convex portion (74, 94) that engages with the convex portion or the concave portion and prevents the polishing member from rotating when the base plate makes an orbital movement due to the rotation of the rotating shaft; and the polishing member. And a polishing member side connecting member (76) for connecting to the drive device side connecting portion provided on the base plate for connecting to the base plate. 5. The drive unit side connecting portion is the drive shaft, the polishing member side connecting member is a screw (76) screwed to the drive shaft, and the screw is provided on the polishing member. From the through hole (7
The polishing member according to claim 4, comprising 7). 6. A polishing member to be attached to a sander, the one end of which is fixed to a mounting portion of the sander facing the polishing member mounting portion on the side of the polishing member, the polishing member being mounted to the polishing member. Screw (101) screwed to the polishing member mounting portion to be fixed to the portion, and a jig (102) for rotating the screw that is erected at the other end of the screw and is screwed to the polishing member mounting portion. And a polishing member (100). 7. A drive shaft (16) eccentrically and rotatably connected at its one end to the rotary shaft (12) extending from a drive source (8) provided in the drive unit (7). A base that is supported by the drive unit and fixed to the other end of the drive shaft by way of an eccentric movement about the axis of the rotary shaft due to the rotation of the rotary shaft, through a support (17) made of an elastic member. An orbital sander driving device for orbitally moving a plate (51), comprising at least one polishing member rotation-preventing protrusion or recess (52) provided on a polishing member mounting surface (51a) of the base plate for mounting a polishing member.
a, 62) and a drive device side connecting portion (53) connecting the base plate and the polishing member, and an orbital sander drive device (50, 54, 60), and the orbital sander drive device. A polishing portion (71) is provided opposite to the first mounting portion (73) which is used and is attached to the polishing member attachment surface (51a) of the base plate of the drive unit for the orbital sander and which is in contact with the polishing member attachment surface. In the first polishing member, the first
The base plate is provided in the mounting portion and is formed corresponding to the polishing member rotation preventing convex portion or concave portion of the base plate, engages with the convex portion or concave portion, and the base plate makes an orbital movement by the rotation of the rotating shaft. When the first polishing member is prevented from rotating on its own, the concave portions or the convex portions (74, 94) are provided.
A screw screwed to the drive shaft for connecting the polishing member to the base plate, the screw having a connecting portion at the head thereof.
An orbital sander including a screw (76) and a first polishing member (70, 90) having a through hole (77) through which the first screw can be inserted from the polishing portion toward the first mounting portion. A second polishing member, which is attached to the base plate of the drive device in place of the first polishing member, is vertically installed with one end fixed to a second mounting portion facing the base plate, A second screw (101) screwed to the drive shaft for fixing the second polishing member to the base plate.
And, when a projection is provided on the polishing member mounting surface of the base plate, a plate body having a thickness exceeding the amount of protrusion of the projection from the polishing member mounting surface and provided on the second mounting portion ( 103), and the first connecting member provided upright on the other end of the second screw and provided on the first screw of the first polishing member.
A second polishing member (100) having a jig (102) that rotates a screw to screw the first screw into the drive shaft.
When the first screw of the first polishing member is screwed onto the drive shaft of the drive unit to attach the first polishing member to the base plate of the drive unit, the second polishing member is The jig of the second screw provided is connected to the connecting portion of the first screw of the first polishing member, and the second polishing member is rotated about the second screw to rotate the first polishing member. An orbital sander in which the first screw of the above is screwed onto the drive shaft of the drive device for the orbital sander. 8. The orbital sander according to claim 7, wherein the connecting portion of the first screw is a hexagonal hole, and the jig of the second screw is a hexagonal wrench.