JPH10296705A - Hand plane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the replacement of a tool quickly and correctly in a hand plane. SOLUTION: A plane shaft 20 having a longitudinal groove which serves as a plane blade receiving portion is rotatably received in a plane casing 12. In this instance, at least each one of, particularly at least one of, cutting edges 22 and a plane blade 21 with which a holding rib 37 for securing a radial position is engaged in the longitudinal groove of the plane shaft 20, and which has one back groove, can be dissociably tightened together in the longitudinal groove. The plane blade 21 and the plane shaft 20 have holding members 160, 162 which are advantageously centered in a range of the longitudinal groove, and which are locked to each other, and the plane blade 21 is secured in an axial direction of the plane shaft 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to claims 1, 9 and 1.
4 relates to a hand-held plane, plane axis and plane blade of the type described in 4.

[0002]

2. Description of the Related Art According to EP 0 179 991 a hand-held plane having a plane shaft consisting of a shaped disk, a loose centrifugal wedge is arranged in the longitudinal groove of the plane shaft for tightening the plane blade. . In this case, changing the plane blade is relatively simple, but accurate axial adjustment of the plane blade with respect to the plane axis is time-consuming and, therefore, often inadequate in the absence of time.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to ensure, with simple means, that the plane blade is quickly and accurately secured against the plane axis and always fastened to the same position and tightened. .

[0004]

The object of the present invention has been attained by a hand-held plane, a plane shaft according to claim 9 and a plane blade according to claim 14.

[0005] Plane shafts which consist of axially clamped forming disks and which have axial securing means for the plane blade, have only one forming disk of a number of forming disks, especially spring-elastic projections. It is particularly easy to manufacture with small differences in the form of the holding element profiled as a profile. This slightly modified forming disc can be mounted in a predetermined axial direction of the plane shaft and serves alone to hold the plane blade.

[0006] The plane blade according to the invention, which is provided with retaining means for the engagement of the locking projections on the plane axis side, can be clamped without any limitation to a conventional hand-held plane or plane axis. Of course, in this case, the securing of the axial position only works if corresponding countermeasures are also arranged on the plane axis side.

A particular advantage of the present invention is that the centrifugal wedge integrated into the shaping disk of the plane shaft has retaining means for engaging the plane blade to ensure axial position, and the centrifugal wedge includes a spring. It is advantageous if the holding means is a locking element due to the elastic arrangement. As a result, the plane blade is retained both when the plane shaft is stopped and when the tightening force is relatively small, and the axial position of the plane blade is particularly reliably ensured. For example, it is possible to prevent the plane blade from unintentionally protruding laterally from the longitudinal groove of the plane shaft or slightly changing its axial position due to collision and impact during transport of the hand-held plane. In this case, the tightening position can be released with a small force by pushing the protrusion of the centrifugal wedge with a screwdriver or a ballpoint pen.
Since the plane blade is a worn part and must be replaced frequently, the time savings when tightening the plane blade with respect to the plane axis and for accurate positioning are significant. This advantage is achieved in that the holding means of the plane shaft cooperates with the holding means of the plane blade.

Therefore, both the plane shaft and the plane blade have the features of the present invention. In this case, the plane shaft is an important replacement part that can be fixed by a conventionally known plane blade without a holding member.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hand-held plane 10 shown in a side view in FIG. 1 holds a machine casing 16 having a motor casing 14 and a hand grip 16. This hand grip 16
Holds an electrical switch 18.

A plane shaft 20 is supported in the machine casing 12 so as to be rotatable about a shaft 19 in the direction of the rotation direction 11. The plane shaft 20 holds two plane blades 21 having cutting edges 22. In front of this plane blade 21, plane axis 2
A chip groove 25 is formed in an outer shell 23 indicated by a broken line 0. When the plane shaft 20 rotates, the plane blade 21 becomes its cutting blade 22.
Draws a flying circle 24 indicated by a chain line. This flying circle 2
Reference numeral 4 projects toward the substrate of the hand-held plane 10 configured as the bottom 26, and the cutting blade 22 engages with a workpiece 27 extending coplanar with the bottom 26 to perform cutting. An opening 28 arranged in the bottom 26 for the cutting blade 22 to project is provided with a swivel protection hood 30.
Can be closed by The turning protection hood 30 automatically closes the opening 28 when the hand-held plane 10 is lifted from the workpiece 27. This allows the operator to rotate the cutting blade 22.
The risk of injury is reduced.

The machine casing 12 has notches 32, 34 on both sides of the plane shaft 20. These notches 32,3
From the side through 4, a plane blade 21 of a plane shaft 20 embodied as a reversing tip with two cutting edges can be removed or inserted. In this case, the plane blade 21 is automatically tightened by the centrifugal wedge described later with reference to FIG. 2 at the start of the operation of the hand-held plane 10, so that nothing other than pushing from the side is necessary for tightening.

The plane shaft 20, having a circular shell 23, shown in FIG. 2, is formed from a consistent package of substantially identical molded disks 36,136. Of these forming disks, only seven forming disks as viewed from the left are shown. These formed disks are clamped together on a centering shaft 38 in the axial direction by clamping members 40 from both sides. In this case, the tightening body 40 can be configured as a screw nut screwed onto the centering shaft 38. The forming discs 36, 136 have two opposing cutouts to reduce the weight. These notches form the hollow chambers 42 and 44 of the plane shaft 20. The cavities 42, 44 are used to engage the adjustment mandrel. With this adjustment mandrel 44, the forming disks 36 can be positioned relative to each other. In this case, the course of the longitudinal groove 46 can be diagonal or spiral in addition to being straight. The cavities 42, 44 can be used to receive the injection plastic that packages the molding disc 36. The difference between the forming disc 136 and the forming disc 136 will be described later with particular reference to FIGS.

The plane shaft 20 has two plane blades 21 on opposite sides in the radial direction. These plane blades 21 are provided with two cutting blades 22 and one back groove 35 as a thin hard metal mini inverted tip.

The plane blade 21 is fastened in the longitudinal groove 46 of the plane shaft 20 between the right and left groove side surfaces 45, 47 of the radially linear groove range. The longitudinal groove 46 starts from the outer shell 23 and is formed on the right groove side surface 45 at the back groove 3 of the plane blade 21.
5 into the transverse step 50 via longitudinal ribs 37 (see FIG. 3), which serve to engage with 5 and from there to straight projections 51 at right angles. Next to the projection 51, the longitudinal groove 46 is expanded into a hollow chamber 52 having an arcuate profile. In this arcuate contour, a thin area between the hollow chamber 52 and the outer shell 23 of the plane shaft forms a leaf spring 54, and the leaf spring 54 is guided to move to the centrifugal wedge 56.

The centrifugal wedges 56, 56 ', 56 "have projections 51 formed in the catch grooves 58 or groove side faces 57, 59 (FIGS. 3 and 4).
And a straight surface extending radially outward defines a groove side surface 47 on the left side of the longitudinal groove 46. This groove side 4
7, radially outside, a chip groove 25 continues to transition to the outer shell 23 of the plane shaft 20 ′. The groove side surface 47 is in contact with the opposed groove side surface 45 in a state where the centrifugal wedge 56 is in contact with the wide surface of the plane blade 21 at the tightening position.
Therefore, when the plane shaft 20 stops and the centrifugal force stops acting, the centrifugal wedge 5
6 are arranged at an angle such that they can return to the release position without being locked. This greatly facilitates replacement of the plane blade.

The catch groove 58 limits the radial travel of the centrifugal wedges 56 ', 56 "both inward and outward to avoid excessive extension of the leaf spring 54.

In the forming disk 36 arranged at the outer end of the plane shaft 20 ', the longitudinal groove 46 is narrower than in other forming disks, and the plane blade 21 is tightened in a tongue shape when viewed from the right side. It is not shown in the drawings that the axial position cannot be changed or lost unintentionally when the plane shaft 20 is stopped. To release the tightening, for example, a screwdriver or a hexagonal shaft to be fitted is pushed into the hollow chamber below the centrifugal wedge 56 of the outermost forming disk 36, and the plane blade 21 is moved by the plane shaft 20 or the hand-held plane. The vertical groove 5 is automatically
6 can be swiveled to a dissociation position that slides out. In order to release the tightening pressure of the plane blade 21, in some cases, it is sufficient to lightly press the operating projection 46 'of the centrifugal wedge 56 with a pencil (not shown).

FIGS. 3 and 4 show, for example, the profile of the forming disk 36 or the side of the plane shaft 20 which is positioned centrally or completely outside in the axial direction on the plane shaft 20.

The centrifugal wedge 56 shown in FIGS. 3 and 4 is different from the centrifugal wedge 56 of the previous drawings in that the projection 4 is directed radially inward.
6 ', with the difference that this projection 46' is used as a tool working surface for pivoting the centrifugal wedge and thus releasing the clamping force of the plane blade.

In FIG. 4, the centrifugal wedge 5 of the outer forming disc 36, which can hold the plane blade in the longitudinal groove 46 with a tightening force.
6 "is a solid line, shown in a normal position when the plane shaft 20" is stopped, and the centrifugal wedge 56 is shown in a broken line with the plane moved radially downward to a position releasing the plane blade. .

5 and 6, a plane shaft 1 according to the present invention is shown.
Aspects of twenty alternative embodiments are shown. In this case, the profile of the centrifugal wedge 156 is
The arrangement of the locking projection 160 of the centrifugal wedge 156 for engaging the notch 162 at 64 (FIG. 11) is also different from the previous embodiment. Further, the plane shaft 120 has two eccentric screws 166 so as to be accessible at both ends. This eccentric screw 16
6 pivots the centrifugal wedge 156 radially inward by pivoting approximately 90 ° about its longitudinal axis, thus enabling a particularly simple replacement of the plane blade 21.

To reduce the weight, the eccentric screw 166 has a relatively large axial hole 168 and is formed in a hollow tubular shape.

The individual forming disks 136 for the plane shaft 120 shown in FIG. 7 are fitted with locking projections 160 on the centrifugal wedge 156 to axially secure the plane blade 21 from being lost or displaced. have.

FIG. 8 is a partially enlarged view of the formed disk 136.
Are shown together with the plane blade 21. In this case,
The locking projection 160 on the left groove side surface of the longitudinal groove 146 or the centrifugal wedge 156 and the locking opening 162 of the plane blade chest 164 of the plane blade 21 are shown.

FIGS. 9 to 12 show a plane blade 2 according to the present invention.
1, that is, the locking opening 1 in the blade chest of the plane blade 21
62 are shown. In this case, in FIG.
A blade back 39 with 5 is shown.

The locking openings 162 are doubly arranged at each outer end of the plane shaft 21 on the side diametrically opposed to the longitudinal axis. Thus, irrespective of which of the two cutting edges is inserted radially outward into the plane shaft 121, the plane shaft 120 is brought into the engagement position with the locking projection 160.

FIG. 10 is a plan view of the cutting blade 22 of the plane blade 21,
FIG. 11 is a side view of a plane blade chest 164 having a locking opening 162 configured as a rectangular recess, and FIG. 12 is an end view of the plane blade 21. In this case, the plane blade chest 1 having the back groove 35, the cutting blade 22 and the locking opening 162 in the plane blade back 39.
64 is clearly shown.

The plane blade 21 is moved from the side to the plane shafts 20, 20 ', 2
0 "longitudinal groove 46, at which time the centrifugal wedges 56, 5
When the 6 ', 56 "is pivoted radially inward, as shown in FIGS. 3 and 4, the play in the guide groove 46 is such that the plane blade 21 is light, essentially hitting with a finger. It is dimensioned such that it can be moved and introduced axially, in which case the play between the locking projection 60 and the blade chest 164 is relatively small. When the locking projection 60 reaches the locking opening 162 during movement, it engages with the locking opening 162 and the plane blade 21 can no longer be moved without the use of significantly greater forces in the longitudinal groove 46.

In this position, the eccentric screw 166 is rotated from the release position to the tightened position, so that the centrifugal wedge 156 can move further outward in the radial direction, and the plane blade 21 is finally fixed. Thus, the axial position of the plane blade 21 is accurately defined. Locking recess 1 which is substantially square in plane shaft 21
The dimension of 62 is matched with the locking projection 60 on the plane axis side. Therefore, when the locking projection 60 is locked in the locking opening 162, a state where there is no play of the plane blade with respect to the plane shaft 20 is guaranteed.

There is no corresponding plane blade according to the invention with a locking opening 162, but it can also be clamped on a plane shaft suitable for receiving known plane blades. In this case, the axial position can of course only be adjusted by hand and the adjustment can only be performed relatively inaccurately.

[Brief description of the drawings]

FIG. 1 is a side view of a hand-held plane according to the present invention.

FIG. 2 is a perspective view of an associated plane shaft.

FIG. 3 is an enlarged side view showing the plane axis of FIG. 2 with the centrifugal wedge displaced radially inward to the maximum.

FIG. 4 is an enlarged side view showing the plane axis of FIG. 2 with the centrifugal wedge displaced maximally radially outward;

FIG. 5 is a view of another embodiment of the plane shaft viewed from one end face side.

FIG. 6 is a view of another embodiment of the plane shaft viewed from the other end surface side.

FIG. 7 is an enlarged view of a formed disk having a holding member corresponding to the plane shaft structure shown in FIGS. 5 and 6;

FIG. 8 is an enlarged view of a formed disk having a holding member corresponding to the plane shaft structure shown in FIGS. 5 and 6;

FIG. 9 shows a plane blade configured as a mini-reversing tip.

FIG. 10 shows a plane blade configured as a mini-reversing tip.

FIG. 11 shows a plane blade configured as a mini-reversing tip.

FIG. 12 shows a plane blade configured as a mini-reversing tip.

[Explanation of symbols]

Reference Signs List 10 hand plane, 12 machine casing, 14 motor casing, 16 hand grip, 18 switch, 19 axis, 20 plane axis, 21 plane blade, 22
Cutting edge, 23 shell, 24 flight circle, 26 bottom,
27 Workpiece, 28 Opening, 32, 34 Notch, 36 Molded Disk, 38 Centering Shaft, 4
0 tightening body, 42 hollow chamber, 44 hollow chamber, 46
Longitudinal groove, 50 horizontal step, 51 protrusion, 56 centrifugal wedge

Claims (16)

[Claims] 1. A plane casing (12) having at least one plane casing (12) serving as a plane blade receiver.
A plane shaft (20) with two longitudinal grooves (46) is rotatably received, in which case each plane blade (20) is removably screwed into said longitudinal groove (46). And the plane blade (21) is especially a mini reversing tip 1.1 × 5.
5 at least one cutting edge (22) and plane axis (20)
And a back groove (35) for engagement with a retaining rib (37) for securing a radial position in the longitudinal groove (46) of the plane plane (2).
0) and the plane axis (20) is in the plane area cooperating with the plane blade (2).
In the area of the longitudinal groove (46) cooperating with 1), the plane shaft (20)
A hand-held plane, characterized in that it has a locking (preferably centering) holding member (160, 162) for securing the axial position of the plane blade (21) with respect to the plane. 2. A plane blade (21) having a thickness of 1.1 mm, a height of 5.5 mm and a width substantially equal to the length of the plane axis (20),
The hand-held plane according to claim 1, wherein the plane is made of hard metal or high-performance high-speed steel. 3. The hand-held plane according to claim 1, wherein the plane axis (20) consists of a stamped shaped disc (36, 136). 4. A plane shaft (20) is formed on a forming disk (36, 13).
4. The hand-held plane according to claim 3, comprising a centrifugal wedge (56) integrated into 6), which serves to clamp the plane blade (21), especially at operating speed. 5. At least one forming disc (36, 13).
A hand-held plane according to claim 3 or 4, wherein 6) has a projection (160) that engages with the notch (162) of the plane blade (21) to secure the position. 6. The molding disc (136), wherein said projection is configured as a locking projection (160) and holds said projection.
6. The hand-held plane according to claim 5, wherein the plane is arranged at the end of the plane axis (20). 7. A locking notch (2) formed as a rectangular recess on the side of the plane blade (21), near its end, diametrically opposite to the longitudinal axis of the plane blade (21). 162)
The hand-held plane according to claim 1, comprising: 8. The locking notch (162) and the projection (160) have an inclined surface capable of engaging the inside and outside without play while centering the both, and in particular a cone or truncated pyramid. 2. The hand-held plane according to claim 1, wherein the plane is configured as a push-in or bay-like part. 9. A plane casing (12) having at least one plane casing (12) serving as a plane blade receiver.
A plane shaft (20) with two longitudinal grooves (46) is rotatably received, in which case each plane blade (20) is removably screwed into said longitudinal groove (46). And the plane blade (21) is especially a mini reversing tip 1.1 × 5.
5 at least one cutting edge (22) and plane axis (20)
A plane groove of a hand-held plane having a back groove (35) for engaging a retaining rib (37) for securing a radial position in the longitudinal groove (46) of the plane blade (21). A locking element (16), preferably centering, in the area of the surface cooperating with (20) and in the area of the longitudinal groove (46) in which the plane axis (20) cooperates with the plane blade (21).
0,162) for securing the axial position of the plane blade (21) with respect to the plane axis (20). 10. Plane shaft according to claim 9, wherein the plane shaft (20) consists of a stamped shaped disc (36, 136). 11. A plane shaft (20) is formed on a forming disk (36, 13).
11. Plane shaft according to claim 10, wherein a centrifugal wedge (56) resiliently integrated in 6) is provided for clamping the plane blade at operating speed. 12. At least one forming disc (36, 1).
36) has a projection (160), which is arranged in particular on the wide side of the plane blade (21) and engages with the notch (162) and holds the projection (160) configured as a locking projection. A disk (136) is arranged at the end of the plane axis (20),
The plane shaft according to claim 11. 13. The protrusion (160) is provided with a molding disc (13).
13. Plane shaft according to claim 12, wherein the centrifugal wedge (6) of 6) is arranged in an area cooperating with the plane blade. 14. Plane casing (12) rotatably receiving a plane shaft (20) with at least one longitudinal groove (46) serving as a plane blade receiver. In this case, in each case one plane blade (20) is detachably fastened in said longitudinal groove (46), said plane blade (21) being in particular a mini-reversing tip 1.1 × 5.
5 at least one cutting edge (22) and plane axis (20)
And a back groove (35) for engaging a retaining rib (37) for securing a radial position in the longitudinal groove (46) of the hand-held plane plane blade. A plane blade, characterized in that it has two locking notches (162) configured as rectangular recesses on the sides diametrically opposite one another with respect to the longitudinal axis near the part. 15. The planing blade (21), wherein the notch (162) is a plane blade (21).
15. The plane blade according to claim 14, wherein the plane blade is arranged on the side of the blade chest. 16. The plane blade (21) has a thickness of 1.1 mm,
15. Plane blade according to claim 14, having a height of 5.5 mm and a width approximately corresponding to the length of the plane shaft (20) and made of hard metal or high-performance high-speed steel.