WO2014119127A1

WO2014119127A1 - Handheld electric grinding machine

Info

Publication number: WO2014119127A1
Application number: PCT/JP2013/082835
Authority: WO
Inventors: 克己大河内; 健司安部; 信康神谷
Original assignee: 株式会社マキタ
Priority date: 2013-02-01
Filing date: 2013-12-06
Publication date: 2014-08-07
Also published as: JP2014148018A

Abstract

A handheld electric grinding machine for grinding wood materials that actuates a sanding belt (21) by using a motor that uses batteries (10) as a power supply, and that is provided with: a housing (31) that accommodates the motor; and a handle (41) that is fixed to the housing (31), and that serves a grip when the handheld electric grinding machine is in use. A battery mounting part is provided to the upper surface of the housing (31), a plurality of batteries (10) being mounted to the battery mounting part as a power supply, thus connecting the plurality of batteries (10) in series.

Description

Handheld electric polishing machine

The present invention relates to a hand-held electric polishing machine that performs polishing on a material to be polished, and particularly to a hand-held electric polishing machine that uses a rechargeable battery pack (hereinafter simply referred to as a battery) as a power source.

A technique relating to a hand-held electric polishing machine using a rechargeable battery as a power source is disclosed in Japanese Utility Model Laid-Open No. 4-102783. The battery of this kind of electric tool is provided with an output voltage of 18V or 36V, for example. An 18V output battery (18V battery) is used for a relatively small and small output model, and a 36V output battery (36V battery) is used for a relatively large model requiring higher output.

Therefore, for users who use many types of power tools including small and large, it is necessary to use multiple types of batteries depending on whether the power tool is small or large. . In view of such problems, an object of the present invention is to make it possible to use a low output battery as a power source for a hand-held electric polishing machine which is a relatively large and high output electric tool. The tool and the battery are used in common, so that the battery for high output is not required and the battery can be used without distinction from the low-power electric tool, thereby improving the convenience and handling of the hand-held electric polishing machine. .

The present invention is a hand-held electric polishing machine that operates a polishing body by a motor that uses a battery as a power source to polish a material to be polished, and includes a housing that houses the motor, a housing that is fixed to the housing, and a hand-held type A battery mounting portion that includes a handle serving as a grip portion when the electric polishing machine is used, and a plurality of batteries are mounted on the outer surface of the housing or the handle as the power source to connect the plurality of batteries in series. Is provided directly or indirectly.

In a preferred embodiment, the polishing body is constituted by an endless belt provided at a lower portion of the housing, and the battery attachment portion is provided so that the plurality of batteries are attached to an upper surface of the housing. .

In a preferred embodiment, the polishing body is configured by an endless belt provided at a lower portion of the housing, the handle is configured to extend in one direction away from the housing, and the battery mounting portion includes the plurality of battery mounting portions. A battery is provided to be attached to a side surface of the housing opposite to the one direction.

In a preferred embodiment, the polishing body is configured by an endless belt provided at a lower portion of the housing, the handle is configured to extend in one direction away from the housing, and the battery mounting portion includes the plurality of battery mounting portions. A battery is provided to be attached to a side surface with respect to the one direction of the housing.

In a preferred embodiment, the polishing body is constituted by an endless belt provided at a lower portion of the housing, the handle extends in one direction away from the housing, and the handle is formed in an annular shape. A switch operating unit for starting and stopping the handheld electric polishing machine is provided on the side facing downward when the handheld electric polishing machine is used inside the annular shape, and the battery mounting portion includes the plurality of batteries, and the handle It is provided so that it may be attached to the cyclic | annular outer side of the edge part of said one direction.

In a preferred embodiment, the handle and the polishing body are provided to extend in opposite directions with respect to the housing, and the battery mounting portion includes the plurality of batteries on the outer surface of the housing, It is provided so that it may be attached to the side where the above-mentioned polishing body extends.

In a preferred embodiment, the handle and the polishing body are provided to extend in opposite directions with respect to the housing, and the housing is covered with an adapter that changes the outer shape of the housing. The plurality of batteries are provided on the outer surface of the adapter so as to be attached to the side on which the handle and the polishing body extend.

According to a preferred embodiment, the handle and the polishing body are provided to extend in opposite directions with respect to the housing, and the handle is configured in an annular shape, and is directed downward when using a handheld electric polishing machine. A switch operating unit for starting and stopping the hand-held electric polishing machine is provided on the side, and the battery mounting unit is provided so that the plurality of batteries are mounted on the lower annular outer portion of the handle. .

It is a side view of a 1st embodiment of the present invention. It is a top view of the said 1st Embodiment. It is a side view of 2nd Embodiment of this invention. It is a front view of the said 2nd Embodiment. It is a top view of the said 2nd Embodiment. It is a side view of 3rd Embodiment of this invention. It is a front view of the said 3rd Embodiment. It is a top view of the said 3rd Embodiment. It is a side view of 4th Embodiment of this invention. It is a front view of the said 4th Embodiment. It is a top view of the said 4th Embodiment. It is a side view of 5th Embodiment of this invention. It is a front view of the said 5th Embodiment. It is a top view of the said 5th Embodiment. It is a side view of 6th Embodiment of this invention. It is a top view of the said 6th Embodiment. It is a side view on the opposite side of FIG. It is a side view of 7th Embodiment of this invention. It is a top view of the said 7th Embodiment. It is a side view on the opposite side of FIG. It is a side view of 8th Embodiment of this invention. It is a top view of the said 8th Embodiment. It is a front view which shows the battery attaching part of the said 1st Embodiment with a battery.

<First Embodiment>
A first embodiment of the present invention will be described with reference to FIGS. The first embodiment is a belt sander that grinds wood as a material to be polished. This belt sander has a rated voltage of 36V and uses two 18V batteries 10 connected in series as a power source. The first embodiment is the same as a conventionally known belt sander except that two batteries 10 are connected in series, and detailed description of the belt sander is omitted. In addition, in each figure of FIG.1, 2, each direction shown with the crossing arrow has shown the direction as each described centering | focusing on the belt sander. The above description regarding the drawings is the same in the corresponding diagrams of the following embodiments.

The belt sander is configured such that the sanding belt 21 is rotated by a motor (not shown) powered by the battery 10. The sanding belt 21 is formed in an endless belt shape, and is rotatable by a pair of rollers 22 arranged at the front and rear. Further, a rear roller (not shown) of the pair of rollers 22 is rotationally driven by the motor via a drive belt (not shown). The motor is covered by a housing 31, the sanding belt 21 is covered by an abrasive cover 23, and the driving belt is covered by a belt cover 32. The abrasive body cover 23 and the belt cover 32 are provided integrally with the housing 31. A handle 41 is provided between the upper rear of the housing 31 and above the rear end of the abrasive body cover 23 so as to be gripped by an operator, and the handle 41 includes the housing 31 and the abrasive body cover. It is formed in an annular shape together with the outer surface of 23. As a result, the handle 41 is configured to extend away from the housing 31 rearward (corresponding to one direction in the present invention). A switch operation unit 43 for commanding start and stop of the motor is provided at the lower part of the handle 41 inside the annular shape. In addition, a front grip 42 is provided in front of the upper portion of the housing 31 on the opposite side of the handle 41 with the housing 31 in between. When using the belt sander, the operator holds the handle 41 with one hand and the other hand. The front grip 42 is held and the belt sander is slid on the wood so that the wood can be polished. A polishing powder discharge port 51 is provided on the upper left side of the housing 31 so that the wood powder obtained as a result of being polished by the sanding belt 21 is discharged out of the housing 31. Although not shown, a dust collection bag is connected to the polishing powder discharge port 51.

The two batteries 10 are attached to the upper surface of the housing 31 via a battery mounting portion (not shown), and the mounting direction of the battery 10 is a direction along the upper surface of the housing 31 as shown by the hatched arrow in FIG. And the forward direction. When each battery 10 is pushed in the direction indicated by the hatched arrow, a mounting portion (not shown) on each battery 10 side and a battery mounting portion (not shown) on the housing 31 side are coupled, and the power terminal of the belt sander Two batteries 10 are connected in series (not shown). The two batteries 10 are mounted side by side on the upper surface of the housing 31, and the vertical height slightly increases the vertical height of the housing 31, but the horizontal direction is substantially equal to the horizontal width of the belt sander, and the vertical direction is the housing. The front and rear length of 31 is substantially equal. In order to keep the height of the battery 10 protruding from the housing 31 low, the battery 10 is arranged such that the vertical direction is the smallest among the front, rear, left, and right and top dimensions of the battery 10. For this reason, the two batteries 10 hardly affect the operation of using the belt sander.

Although not shown in FIGS. 1 and 2, a battery mounting portion is provided on the upper surface of the housing 31. Details of the battery mounting portion are shown in FIG. In FIG. 23, two batteries 10 are attached to the battery attachment portion 60 and electrical connection is made. Therefore,

connection terminals

61 and 62 for two batteries, a pair of

rail receiving portions

63 and 63, A claw locking portion 64 is provided. The

connection terminals

61 and 62 are respectively connected to the positive and negative electrodes of each battery 10, and the rail receiving portion 63 is engaged with a rail portion (not shown) of the mounting portion on the battery 10 side in FIG. The battery 10 is mechanically held by inserting the battery 10 in the direction indicated by the arrow. The claw locking portion 64 engages with a claw portion (not shown) provided on the battery 10 side so that the state is maintained when the battery 10 is inserted and held as described above. It is. As such a battery mounting portion 60, a battery mounting portion for one battery is conventionally known, and here, two battery mounting portions for one battery are provided side by side to be equivalent to two batteries.

According to the first embodiment described above, a battery of 36V is not used for a belt sander having a rated voltage of 36V, but two 18V batteries 10 are used. An 18V battery can be used. Therefore, the 18V battery can be used without distinction from the low-power electric tool, and the convenience and handling of the belt sander with the rated voltage of 36V can be improved. Moreover, since the two batteries 10 are mounted on the upper surface of the housing 31 at a position away from the handle 41 and the front grip 42, even if the space occupied by the batteries becomes large as a result of having two batteries 10, The battery 10 can be prevented from getting in the way when the handle 41 and the front grip 42 are gripped.

Second Embodiment
A second embodiment of the present invention will be described with reference to FIGS. The second embodiment is characterized in that the mounting direction of the two batteries 10 in the belt sander is changed, and the other parts are exactly the same. Are denoted by the same reference numerals and will not be described again. However, in FIGS. 3 to 5, the overall configuration is simplified as compared with FIGS. 3 to 5, the battery 10 important in the present invention is hatched so as to stand out. The above description regarding the drawings is the same in the corresponding diagrams of the following embodiments. In the belt sander of the second embodiment, as shown by the hatched arrows in FIG. 5, the two batteries 10 are configured to be attached to the upper surface of the housing 31 from the right direction. Therefore, the direction of the battery mounting portion (not shown) is also shifted by 90 degrees from the case of the first embodiment. As described above, the second embodiment is different from the first embodiment only in the mounting direction of the battery 10, and the others are completely the same.

<Third Embodiment>
A third embodiment of the present invention will be described with reference to FIGS. The third embodiment is characterized in that the mounting position of the two batteries 10 within the belt sander is changed with respect to the first embodiment described above, and the other parts are exactly the same. Are denoted by the same reference numerals and will not be described again. In the belt sander of the third embodiment, it is attached to the front portion of the housing 31 via the same battery attachment portion (not shown) as that of the first embodiment so that two batteries 10 having a terminal voltage of 18V are connected in series. It has been.

When the two batteries 10 are pushed in the direction indicated by the hatched arrows in FIG. 6, the attachment parts (not shown) on each battery 10 side and the battery attachment part (not shown) on the housing 31 </ b> A side are combined, Two batteries 10 are connected in series to a power terminal (not shown) of the belt sander. When the batteries 10 are attached in this way, the two batteries 10 are arranged such that the left-right direction is within the left-right width of the housing 31, the front-rear direction is prevented from projecting from the front end of the polishing body cover 23, and the vertical direction is also It is formed to fit within the vertical width of the housing 31. For this reason, the two batteries 10 hardly affect the operation of using the belt sander. According to this 3rd Embodiment, the same effect as the above-mentioned 1st Embodiment can be achieved.

<Fourth embodiment>
A fourth embodiment of the present invention will be described with reference to FIGS. The feature of the fourth embodiment with respect to the first embodiment is that the mounting positions of the two batteries 10 in the belt sander are changed, and the other parts are exactly the same. Are denoted by the same reference numerals and will not be described again. In the belt sander of the fourth embodiment, a battery attachment portion (not shown) similar to that of the first embodiment is provided on the right side of the housing 31 so that two batteries 10 having a terminal voltage of 18V are connected in series. Attached. When each battery 10 is pushed in the direction indicated by the hatched arrow in FIG. 9, a mounting portion (not shown) on each battery 10 side and a battery mounting portion (not shown) on the housing 31 side are coupled, and the belt sander Two batteries 10 are connected in series to a power supply terminal (not shown).

The two batteries 10 are attached to the right side of the housing 31, and the vertical direction is accommodated within the vertical width of the housing 31, and the horizontal direction slightly protrudes to the right of the housing 31. It is stored in the longitudinal length of 31. In order to suppress the amount of protrusion of the battery 10 from the housing 31 to the right, the battery 10 is arranged so that the left-right direction is the smallest among the front, rear, left, and upper dimensions of the battery 10. For this reason, the two batteries 10 hardly affect the operation of using the belt sander. According to this 4th Embodiment, the effect similar to the above-mentioned 1st Embodiment can be achieved.

<Fifth Embodiment>
A fifth embodiment of the present invention will be described with reference to FIGS. The feature of the fifth embodiment with respect to the first embodiment described above is that the mounting positions of the two batteries 10 in the belt sander are changed. Are denoted by the same reference numerals and will not be described again. In the belt sander of the fifth embodiment, the battery 10 having a terminal voltage of 18V is connected to the annular end of the rear end portion of the handle 41A that is annular so that two batteries 10 are connected in series. It is attached via a battery attachment part (not shown). For this reason, a flange portion 44 having a size corresponding to the size in which two batteries are arranged is formed on the annular outer side of the rear end portion of the handle 41A. When each battery 10 is pushed in the direction indicated by the hatched arrow in FIG. 12, a mounting portion (not shown) on each battery 10 side and a battery mounting portion (not shown) on the flange portion 44 side are coupled, and the belt sander Two batteries 10 are connected in series to a power supply terminal (not shown).

The two batteries 10 are stored in the vertical width of the rear end of the flange portion 44 of the handle 41A in the vertical direction, are stored in the horizontal width of the belt sander in the horizontal direction, and protrude in the rear direction of the handle 41A. Has been. In order to keep the amount of protrusion of the battery 10 in the rearward direction of the handle 41A small, the battery 10 is arranged so that the front-rear direction is the smallest among the front, rear, left, and upper dimensions of the battery 10. For this reason, the two batteries 10 hardly affect the operation of using the belt sander. According to the fifth embodiment, it is possible to achieve the same effect as that of the first embodiment.

<Sixth Embodiment>
A sixth embodiment of the present invention will be described with reference to FIGS. The sixth embodiment is a belt sander that enables polishing work on a material to be polished having a complicated shape and polishing work in a narrow place as compared with the above-described embodiments, and this belt sander has a rated voltage of 36V. Thus, two 18V batteries 10 are connected in series as a power source. The sixth embodiment is the same as a conventionally known belt sander except that two batteries 10 are connected in series, and detailed description of the belt sander is omitted. In each of FIGS. 13 to 15, the directions indicated by the intersecting arrows indicate the directions as described with the belt sander as the center. In each of FIGS. 13 to 15, the battery 10 important in the present invention is hatched so as to stand out. The above description regarding the drawings is the same in the corresponding diagrams of the following embodiments.

The belt sander is configured such that the sanding belt 21A is rotated by a motor (not shown) that uses the battery 10 as a power source. The sanding belt 21A is formed in an endless belt shape that is narrower than the sanding belt 21 of each of the above-described embodiments, and can be rotated by a pair of

rollers

22A and 22A arranged at the front and rear. The rear roller 22A of the pair of

rollers

22A and 22A is driven to rotate by the motor. The pair of

rollers

22A and 22A are relatively separated from each other, and the sanding belt 21A is formed to be elongated. The motor is covered by the housing 31A, and the sanding belt 21A is partially covered by the polishing body cover 23A on the rear side. The polishing body cover 23A is provided integrally with the housing 31A. A handle 41B is provided on the upper portion of the housing 31A toward the rear, which is the direction opposite to the direction in which the sanding belt 21A extends from the housing 31A. The handle 41B is formed to have an appropriate thickness for the operator to hold. Yes. A switch operation unit 43A for instructing start and stop of the motor is provided at a lower part of the handle 41 and closer to the housing 31A.

The two batteries 10 are respectively attached to the front and rear positions on the outer surface of the housing 31A at positions spaced from the handle 41B in the left-right direction. (Shown) is provided. When each battery 10 is pushed in the direction indicated by the hatched arrow in FIG. 16, a mounting portion (not shown) on each battery 10 side and a battery mounting portion (not shown) on the outer surface side of the housing 31A are combined, Two batteries 10 are connected in series to a power terminal (not shown) of the belt sander. When the two batteries 10 are mounted on the outer surface of the housing 31A as described above, the front-rear direction protrudes to increase the thickness of the housing 31A, but falls within the front-rear length range of the belt sander. The horizontal direction is within the range of the left and right width of the housing 31A, and the vertical direction is within the range of the vertical width of the housing 31A. In order to keep the amount of protrusion of the battery 10 in the front-rear direction small, the battery 10 is arranged so that the front-rear direction is the smallest among the front-rear, left-right, and upper-lower dimensions of the battery 10. For this reason, the two batteries 10 hardly affect the operation of using the belt sander. According to the sixth embodiment, it is possible to achieve the same effect as that of the first embodiment described above.

<Seventh embodiment>
A seventh embodiment of the present invention will be described with reference to FIGS. The feature of the seventh embodiment with respect to the above-described sixth embodiment is that the two batteries 10 are attached to the housing 31B via the adapter 33, and the other parts are exactly the same. Are denoted by the same reference numerals and will not be described again. The belt sander is also available in several shapes and sizes, depending on the application. If the housing is different in shape and size, the battery mounting part will also be attached when trying to install the battery on the outer surface of the housing. You will have to prepare for each type of housing. In order to solve this problem, the seventh embodiment uses the adapter 33 to share the battery mounting portion. The belt sander housing 31B of the seventh embodiment has a smaller diameter than the housing 31A of the sixth embodiment, and the battery attachment for attaching the battery 10 by covering the adapter 33 on the outer surface of the housing 31B. The parts are the same as those in the sixth embodiment.

When the two batteries 10 are pushed in the direction indicated by the hatched arrows in FIG. 19, the attachment portions (not shown) on each battery 10 side and the battery attachment portions (not shown) on the adapter 33 side are combined, Two batteries 10 are connected in series to a power terminal (not shown) of the belt sander. As described above, the seventh embodiment is different from the sixth embodiment only in that the adapter 33 is attached to the outer surface of the housing 31B, and the other points are all the same. Similarly, the two batteries 10 hardly affect the operation using the belt sander. Further, according to the seventh embodiment, it is possible to achieve the same effect as that of the first embodiment described above.

<Eighth Embodiment>
The eighth embodiment of the present invention will be described with reference to FIGS. The feature of the eighth embodiment with respect to the above-described sixth embodiment is that the mounting positions of the two batteries 10 in the belt sander are changed. Are denoted by the same reference numerals and will not be described again. In the eighth embodiment, the shape of the handle 41C is changed compared to the handle 41B of the sixth embodiment, and the handle 41C is configured to form an annular shape behind the housing 31A. Accordingly, the switch operation portion 43A provided on the handle 41C is disposed inside the annular portion. Two batteries 10 are attached to the lower part of the annular outer peripheral side of the annular handle 41C. When the two batteries 10 are pushed in the direction indicated by the hatched arrows in FIG. 22, the attachment portions (not shown) on each battery 10 side and the battery attachment portions (not shown) on the handle 41 </ b> C side are combined, Two batteries 10 are connected in series to a power terminal (not shown) of the belt sander.

The two batteries 10 are configured such that the front-rear direction thereof is within the range of the front-rear length of the handle 41C, and the left-right direction is substantially within the range of the left-right width of the housing 31A. On the other hand, although the two batteries 10 protrude below the handle 41C, the batteries 10 are arranged so that the vertical direction is the smallest among the front, rear, left, and upper dimensions of the battery 10, The protruding amount is suppressed. For this reason, the two batteries 10 hardly affect the operation of using the belt sander. According to the eighth embodiment, it is possible to achieve the same effect as that of the first embodiment.

As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example,
1. Although the case where an 18V battery is used as the battery has been described in the above embodiment, a battery having another voltage such as a 14.4V battery may be used. In order to achieve the object of the present invention, it is desirable to select a battery to be used that has the same standard as the most popular battery.
2. In the above-described embodiment, the case where two batteries are connected in series has been described. However, the number of batteries connected in series may be three or more. In order to achieve the object of the present invention, it is possible to determine the number of batteries used in accordance with the rated voltage of the hand-held electric polishing machine to be applied so that a battery having the same standard as the most popular battery can be used. desirable. For example, when the popular battery is an 18V battery and the rated voltage of the hand-held electric polishing machine is 54V, the battery to be used is an 18V battery and the number of use is three.

Claims

A hand-held electric polishing machine that operates a polishing body by a motor powered by a battery to polish a material to be polished,
A housing for housing the motor;
A handle fixed to the housing and serving as a grip when using a hand-held electric polishing machine;
A hand-held electric polishing machine in which a plurality of batteries as a power source are attached to the outer surface of the housing or the handle to directly or indirectly provide a battery mounting portion for connecting the plurality of batteries in series.
In claim 1,
The polishing body is constituted by an endless belt provided at a lower portion of the housing,
The battery attachment portion is a hand-held electric polishing machine in which the plurality of batteries are provided to be attached to an upper surface of the housing.
In claim 1,
The polishing body is constituted by an endless belt provided at a lower portion of the housing,
The handle extends in one direction away from the housing;
The battery mounting portion is a hand-held electric polishing machine in which the plurality of batteries are mounted on a side surface in the direction opposite to the one direction of the housing.
In claim 1,
The polishing body is constituted by an endless belt provided at a lower portion of the housing,
The handle extends in one direction away from the housing;
The battery mounting portion is a hand-held electric polishing machine in which the plurality of batteries are provided on a side surface with respect to the one direction of the housing.
In claim 1,
The polishing body is constituted by an endless belt provided at a lower portion of the housing,
The handle extends in one direction away from the housing;
The handle is configured in an annular shape, and on the inner side of the handle, when the handheld electric polishing machine is used, a switch operation unit for starting and stopping the handheld electric polishing machine is provided on the downward side,
The battery mounting portion is a hand-held electric polishing machine in which the plurality of batteries are provided so as to be mounted on the annular outer side of the one-direction end portion of the handle.
In claim 1,
The handle and the polishing body are provided extending in opposite directions to the housing,
The battery mounting portion is a hand-held electric polishing machine in which the plurality of batteries are mounted on the outer surface of the housing on the side where the handle and the polishing body extend.
In claim 1,
The handle and the polishing body are provided extending in opposite directions to the housing,
The housing is covered with an adapter for changing the outer shape of the housing,
The battery attachment portion is a hand-held electric polishing machine in which the plurality of batteries are provided on the outer surface of the adapter so as to be attached to the side on which the handle and the polishing body extend.
In claim 1,
The handle and the polishing body are provided extending in opposite directions to the housing,
The handle is configured in an annular shape, and on the inner side of the handle, when the handheld electric polishing machine is used, a switch operation unit for starting and stopping the handheld electric polishing machine is provided on the downward side,
The battery attachment portion is a hand-held electric polishing machine in which the plurality of batteries are provided to be attached to an annular outer lower portion of the handle.