JP2912168B2 - Electric planer with chip discharge mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an electric planer having a chip discharging mechanism, and more particularly to a structure for freely selecting a discharge port for discharging chips.

[0002]

2. Description of the Related Art A conventional example of an electric planer having a chip discharge mechanism is disclosed in German Patent Publication No. 3542263. This hand-held planing machine is provided with a planing tool 80 as shown in FIG. 5, and the surface of wood or the like is cut by the rotation of the planing tool 80. Chips generated by cutting are flipped upward in the chip channel 81 by the rotating wind of the planing tool 80.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. On both sides of the housing 86 above the chip channel 81, discharge ports 82a, 82 for chip discharge are respectively provided.
b is formed. Chips that have passed through the chip channel 81 are discharged to the outside from the discharge ports 82a or 82b.

[0004] In the housing 86, a warp wall 84 for closing either the discharge port 82a or 82b is located. The warped wall 84 is fixed to a side wall 84M, and the side wall 84M is supported by a turning shaft 83.
That is, the warp wall 84 rotates in the directions of arrows 90 and 91 around the turning shaft 83, and the discharge port 82a or 82
Close one of b and open the other. Swivel shaft 83
A knob 85 is fixed to the, and the opening of the discharge port 82a or 82b is selected by rotating the knob 85.

[0005] As described above, the chips generated by the cutting are turned into the chip channels 8 by the rotating wind of the planing tool 80.
1 to the housing 86 (see FIG. 5). Then, the chips are discharged to the outside through the selectively opened discharge port 82a or 82b. Thus, by rotating the knob 85, the direction in which the chips are discharged can be freely selected.

[0006]

The above conventional hand-held planing machine has the following problems. When the opening of the discharge port 82a or 82b is selected by rotating the warp wall 84, the knob 85 is rotated in the directions of arrows 90 and 91. Here, the knob 85 is fixed to the turning shaft 83,
Since it applies a force to the rotation center of the warp wall 84,
There is a problem that relatively large force is required and operability is poor.

In particular, a certain degree of contact resistance is generated between the housing 86 and the warp wall 84 so that the warp wall 84 does not rotate during the work due to the influence of the rotating wind force or the vibration of the planing tool 80. It is provided as follows. For this reason, the knob 85 fixed to the turning shaft 83
Even more force is required to rotate the.

Further, since the knob 85 is directly fixed to the turning shaft 83, the degree of freedom of the position where the knob 85 is provided is limited. That is, as shown in FIGS. 5 and 6, the knob 85 is located coaxially with the turning shaft 83, and cannot be provided at a position that is easy for the operator to operate. The same problem arises.

Accordingly, an object of the present invention is to provide an electric plane having a chip discharging mechanism with good operability.

[0010]

Solution The object of the present invention, in order to solve the problems]
The means for determining will be described below.

An electric planer having a chip discharging mechanism according to claim 1 is in communication with a chip channel of a cutting section, and a discharge path through which the cut chips are guided, and a chip guided through the discharge path. It has a discharge port and a gear portion provided on both sides of the housing for discharging to the outside of the housing, and is rotatably supported in the discharge path by a movable wall center axis. Thereby, a movable wall that selectively opens one of the discharge ports, a switching lever that is exposed to the outside of the housing and has a switching lever that rotates the movable wall, A selective rotation operation unit that is pivotally supported by the operation unit central axis and rotates about the operation unit central axis, and has a gear unit that meshes with the gear unit of the movable wall. Selective rotation operation with switching lever connected Comprises a, it is characterized by satisfying the following equation.

1 / LK ′> r2 / (LK · r1) where LK ′ is supposed to be directly with respect to the center axis of the movable wall.
The length of the switching lever when the switching lever is connected, LK is the length of the switching lever connected to the central axis of the operating section, and r1 is the distance from the central axis of the movable wall to the pitch circle of the gear section in the movable wall. , R2 is the radius from the central axis of the operation unit in the selective rotation operation unit to the pitch circle of the gear unit.

[0013]

The operation of the present invention will be described below.

An electric device having a chip discharging mechanism according to claim 1 is provided.
If you are concerned, select one of the outlets selectively
A movable wall that opens is provided, and
Only the desired outlet can be operated by operating the change lever.
Release.

[0015] When designing equipment, the chips guided through the discharge passage can be discharged from a desired outlet.

Further, the movement of the switching lever of the selective rotation operation section is transmitted to the movable wall via the gear section. Therefore, the degree of freedom of the position where the switching lever is provided can be increased, and the switching lever can be provided at a position where it is easy to operate.

Furthermore, the length LK of the switching lever connected to the central axis of the operating section, the radius r1 from the central axis of the movable wall to the pitch circle of the gear section in the movable wall, and the center of the operating section in the selective rotation operating section. The radius r2 from the shaft to the pitch circle of the gear portion is configured so as to satisfy the following formula with respect to the length LK ′ of the switching lever when the switching lever is connected directly to the center axis of the movable wall. ing.

1 / LK ′> r2 / (LK · r1) Therefore, by rotating the selective rotation operation portion, a smaller force is required as compared with the case where the switching lever is directly connected to the center axis of the movable wall. With this, the movable wall can be rotated.

[0019]

【Example】

[First Embodiment] A first embodiment of an electric planer having a chip discharging mechanism according to the present invention will be described with reference to the drawings.
FIG. 1 shows an external side view of the electric planer. The operator grips the handle portion 40 and moves the electric plane in the direction of arrow 99 to cut, for example, the cut surface 45M of the wood 45. The adjustment knob 42 is a knob for adjusting the cutting depth. Note that power is supplied through the cable 41.

FIG. 2 is a partial sectional view of FIG. This electric planer has a planing part 2 as a cutting part,
The planing unit 2 is driven by a motor (not shown) and rotates to cut the cutting surface 45M (FIG. 1). Chips generated by the cutting of the planing portion 2 are flipped upward in the chip channel 4 by the rotating wind of the planing portion 2 and guided to the discharge path.

FIG. 3 is a sectional view taken in the direction of arrows III-III in FIG. Discharge ports 6a and 6b for discharging chips are formed on both side surfaces of the housing 5 in the discharge path above the chip channel 4, respectively. Chips that have passed through the chip channel 4 are discharged from the discharge ports 6 a on both sides of the housing 5.
Or it is discharged to the outside from 6b.

The housing 5 has a discharge port 6a or 6
A baffle wall 8 for closing any one of the b. That is, the warp wall 8 selectively opens one of the outlets 6a and 6b. The warp wall 8 is fixed to the side wall 9, and the side wall 9 has arrows 90, 9 around an axis 9J that is the movable wall center axis.
It is held by the housing 5 so as to be rotatable in one direction.

As described above, the wall 8 is deflected about the shaft 9J, and the wall 8 is rotated in the directions of arrows 90 and 91 so that the discharge port 6a or 6b
Is selectively opened. As a result, chips guided from the chip channel 4 through the discharge path travel along the obliquely located warp wall 8 and are discharged from the open discharge port. Therefore, the direction in which the chips are discharged can be selected according to the situation, and the workability can be improved.

Next, a mechanism for rotating the warp wall 8 in the directions of arrows 90 and 91 will be described. The side wall 9 is integrally provided with the gear forming surface 7 together with the warp wall 8. The gear forming surface 7 has a curved shape as shown in FIG. 3, and a gear 7G is formed on an outer peripheral surface thereof. The warp wall 8, the side wall 9, the gear forming surface 7, and the like are movable walls in the present invention.

On the other hand, a switching unit 10 as a selection operation unit or a selection rotation operation unit is located above the gear forming surface 7. The switching unit 10 has a substantially semicircular shape as shown in FIG. 3, and a gear 10G is formed on the outer periphery. The gear 10G meshes with the gear 7G on the gear forming surface 7.

The switching unit 10 is an axis 1 which is a central axis of the operation unit.
It is held in a housing 5 as a housing by 0J, and is rotatable in the directions of arrows 92 and 93 around a shaft 10J. A knob 12 as a switching unit or a switching lever is fixed to the shaft 10J, and the knob 12 is located outside the housing 5 .

FIG. 3 shows a state in which the warp wall 8 rotates in the direction of arrow 91 to close the outlet 6a and open the outlet 6b. For example, when opening the discharge port 6a from the state of FIG. 3, the knob 12 is rotated in the direction of arrow 91. As the knob 12 rotates, the switching unit 10 rotates in the direction of arrow 92. And knob 12
Is transmitted to the warp wall 8, the side wall 9 and the gear forming surface 7 which are integrally formed via the gears 10G and 7G.

Thus, the warp wall 8, the side wall 9, and the gear forming surface 7 rotate in the direction of the arrow 90 around the shaft 9J,
The outlet 6b is closed and the outlet 6a is opened. Outlet 6b
If you want to open, the rotating operation of the knob 12 in the opposite to arrow 9 1 direction. In addition, both ends 8a and 8b of the warp wall 8
The discharge ports 6a and 6b are positioned in contact with the lower end faces 6c and 6d.

As described above, the knob 1 of the switching unit 10
The movement of 2 is transmitted to the warp wall 8 and the like via the gear portions 7G and 10G. For this reason, the degree of freedom of the position where the knob 12 is provided can be increased as compared with a case where the knob 85 is directly fixed to the turning shaft 83 as in a conventional hand-held planing machine (see FIGS. 5 and 6). It is possible to provide the knob 12 at a position where it is easy to operate. Therefore, it is possible to provide an electric planer having a chip discharging mechanism with good operability.

As shown in FIG. 3, the tip of the knob 12 is provided in such a manner that the inclination direction of the tip coincides with the open side of the discharge port 6a or 6b. For this reason, the worker can easily recognize the open discharge port, and the workability can be improved.

As shown in FIG. 3, the radius r1 from the shaft 9J on the warp wall 8 to the pitch circle of the gear 7G, the switching unit 10
The radius r2 from the shaft 10J to the pitch circle of the gear 10G and the length LK from the shaft 10J to the tip of the knob 12 in the switching unit 10 are configured to satisfy the condition of the expression.

1 / LK ′> r2 / (LK · r1) In the formula, LK ′ is a case where the knob 12 (switching lever) is directly connected to the shaft 9J of the warp wall 8 (FIG. 5, This is the length of the knob 12 of the knob 85 in FIG. 6). Therefore, the force applied to the knob 12 can be amplified and transmitted to the warp wall 8, and the knob 12 can be rotated with a smaller force than when the knob 12 is directly connected to the shaft 9J of the warp wall 8. Thus, the warp wall 8 can be rotated. Therefore, operability can be improved.

That is, the force F required to rotate the knob 12 in this embodiment is expressed by the following equation. Here, T is the rotational resistance of the shaft 9J of the warp wall 8.

F = T / LK.r2 / r1 On the other hand, if the knob 12 is deflected and connected directly to the shaft 9J of the wall 8 as in the conventional example, the knob 12 is rotated. Is represented by the following equation. Here, T 'is the rotation resistance of the warped wall 8 at the axis 9J in this case.

F ′ = T ′ / LK ′... Here, when T = T ′ while the rotational resistance of the warp wall 8 on the shaft 9J is constant, the condition that F becomes smaller than F ′ is as follows. It is expressed by an equation. As described above, the force F required for rotating the knob 12 is smaller than the force F ′ required for the rotating operation when the knob 12 is warped and directly connected to the shaft 9J of the wall 8 and the operation is performed. Performance can be improved.

Second Embodiment Next, FIG. 4 shows a second embodiment of an electric planer having a chip discharging mechanism according to the present invention. In this embodiment, a switching bar 30 as a selection operation unit or a selection slide operation unit is provided in place of the switching unit 10, the knob 12, and the like in the first embodiment.

The switching bar 30 has arrows 94 and 95
It is slidably held in the housing 5 , and one of the ends 30 a and 30 b (switching portion) projects from the housing 5 . The switching bar 30 is formed with a gear 30G that fits with the gear 7G on the gear forming surface 7.

That is, when the end 30a of the switching bar 30 is pressed from the state shown in FIG. 4 and the switching bar 30 is slid in the direction of the arrow 94, the sliding movement is performed by the warp wall 8 via the gears 30G and 7G. Is transmitted to
Then, the warp wall 8, the side wall 9, and the gear forming surface 7 rotate around the shaft 9J in the direction of the arrow 90 to close the discharge port 6b and open the discharge port 6a. To open the discharge port 6b, the end 30b of the switching bar 30 is pressed in reverse, and the switching bar 30 is slid in the direction of the arrow 95.
Other configurations are the same as in the first embodiment.

As described above, in this embodiment, the switching bar 3
By simply pressing either one of the end portions 30a and 30b of the zero, the warp wall 8 can be rotated in the directions of arrows 90 and 91 to selectively open one of the discharge ports 6a or 6b. Therefore, it is possible to provide an electric planer having a chip discharging mechanism with good operability.

[Other Embodiments] In the above-described embodiment, an electric plane in which chips are flipped to the chip channels 4 and the housing 5 by the rotating wind of the planing portion 2 has been described as an example. However, the present invention can also be applied to an electric planer in which chips are splashed to the chip channel 4 and the housing 5, for example, by the wind force of a chip discharging motor.

Further, the movable wall and the selection operation section are not limited to the shape and structure shown in the above embodiment, and other shapes and structures can be used. That is, the electric planer having the chip discharging mechanism according to the present invention is not limited to the configuration shown in each of the above-described embodiments. May be adopted.

[0042]

The effects of the present invention will be described below.

An electric device having a chip discharging mechanism according to claim 1 is provided.
If you are concerned, select one of the outlets selectively
A movable wall that opens is provided, and
Only the desired outlet can be operated by operating the change lever.
Release. That is, the cutting led through the discharge channel
Debris can be discharged from the desired outlet.

[0044] When designing equipment, outright can select the discharge direction of the chips depending on the situation, it is possible to enhance the workability.

Further, the movement of the switching lever of the selective rotation operation section is transmitted to the movable wall via the gear section. That is, the degree of freedom of the position where the switching lever is provided can be increased, and the switching lever can be provided at a position that is easy to operate. Therefore, it is possible to provide an electric planer having a chip discharging mechanism with good operability.

Further, the length LK of the switching lever connected to the central axis of the operating section, the radius r1 from the central axis of the movable wall to the pitch circle of the gear section in the movable wall, and the center of the operating section in the selective rotation operating section. The radius r2 from the shaft to the pitch circle of the gear portion is configured so as to satisfy the following formula with respect to the length LK ′ of the switching lever when the switching lever is connected directly to the center axis of the movable wall. ing.

1 / LK ′> r2 / (LK · r1) That is, by rotating the selection rotation operation section,
The movable wall can be rotated with a smaller force than when the switching lever is directly connected to the movable wall center axis. Therefore, it is possible to provide an electric planer having a chip discharging mechanism with good operability.

[Brief description of the drawings]

FIG. 1 is an external side view showing a first embodiment of an electric planer having a chip discharging mechanism according to the present invention.

FIG. 2 is a partial sectional view of an electric planer having a chip discharging mechanism shown in FIG.

FIG. 3 is a sectional view taken in the direction of arrows III-III in FIG. 2;

FIG. 4 is a sectional view showing a second embodiment of an electric planer having a chip discharging mechanism according to the present invention.

FIG. 5 is an external side view showing a conventional hand-held planing machine.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

[Explanation of symbols]

 2 Plan cutting part 4 Chip channel 5 Housing 6a, 6b Discharge port 7 Gear forming surface 7G, 10G, 30G ··· Gear 8 ······ Warp wall 9 ··· Side wall 9J, 10J ··· Shaft 10 ··· Switching unit 10 12 ··· Knob 30 ···・ Switch bar

Claims (1)

(57) [Claims] 1. A discharge path which is in communication with a chip channel of a cutting section and through which the cut chips are guided, and a case for discharging chips guided through the discharge path to the outside of the case. Has a discharge port and a gear portion provided on both side surfaces of the discharge port, respectively, and is rotatably supported in a discharge path by a movable wall central axis so that one of the discharge ports can be selectively provided. An electric plane having a chip discharge mechanism including a movable wall to be opened, a switching lever exposed to the outside of the housing, and rotating the movable wall, is supported by a central axis of the operation unit. A selection rotation operation unit that rotates about an axis, the selection rotation operation unit having a gear unit that meshes with a gear unit of a movable wall, and a switching lever connected to the operation unit central axis. , And satisfy the condition of the following formula. Electric planer with chip evacuation mechanism that. 1 / LK ′> r2 / (LK · r1) where LK ′ is, for example, directly
The length of the switching lever when the switching lever is connected, LK is the length of the switching lever connected to the central axis of the operating section, and r1 is the distance from the central axis of the movable wall to the pitch circle of the gear section in the movable wall. , R2 is the radius from the central axis of the operation unit in the selective rotation operation unit to the pitch circle of the gear unit.