JP3510972B2 - Router - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a router which is mounted on a stand with the mounting side of a bit facing upward and which can be used stationary by the stand.

[0002]

2. Description of the Related Art The above router is mounted on a table on the upper surface of a stand with the mounting side of the bit facing up from the back surface of the stand so that the bit protrudes over the table and the bit is processed on the table while rotating at that position. Send the material side,
It is possible to use it in a stationary position for chamfering and grooving.
On the other hand, the bit is mounted on the rotary shaft by a predetermined mounting means. As the mounting means, for example, the tip of the rotary shaft having a bottomed hole having a tapered outlet side is slidably contacted with the bottomed hole. A structure is known in which a collet nut accommodating a collet cone that can be expanded and contracted is screwed. In this method, a collet cone that contracts tightens the shank portion of the bit by screwing the collet nut into the rotary shaft with the shank portion inserted, and integrates it with the rotary shaft.

[0003]

Since the bottomed hole of the rotary shaft must be formed deep so that any of various types such as a long shank portion of the bit can be mounted, the shank portion is short and the blade portion is small. In the case of a bit whose outer diameter is less than the inner diameter of the bottomed hole, in the stationary use with the above stand, loosen the collet nut when removing the bit,
The bit that has been unmounted falls into the hole with a bottom, and the bit cannot be taken out unless the stand is turned upside down.

Therefore, an object of the present invention is to provide a router in which even such a short bit can be easily removed without fear of falling and the workability of removal is good. is there.

[0005]

In order to achieve the above object, the invention according to claim 1 is such that, when the stand is fixedly used by the stand, the bottomed hole is unmounted by the mounting means. A spacer is inserted to prevent the bit from falling into the bottomed hole more than a predetermined amount. The invention described in claim 2 is the same as claim 1
In addition to the above-mentioned purpose, the spacer can be coupled to the shank portion of the bit in order to easily take out the spacer when the spacer is unnecessary.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 (A) and 1 (B) are a front explanatory view and a side explanatory view of a router, respectively.
The tip of the motor shaft 4 of the motor 3 incorporated in the housing is made to project below the housing 2 in FIG. 1, and a bit can be attached to the tip. A base 7 is connected orthogonally to the motor shaft 4. The one bar 5 is a cylindrical body that is loosely inserted into the housing 2 and is mounted on the pole 8 inside the housing 2, and is urged by the compression spring 9 mounted on the pole 8 in the direction away from the housing 2 together with the base 7. ing. The other bar 6 has a screw member 10 coaxially connected to the tip thereof and penetrates through the housing 2. By adjusting the screwing position of an adjusting nut 11 screwed onto the screw member 10, the housing 2 of the base 7 is adjusted. It is possible to regulate and adjust the position of separation from.

Next, FIG. 2 shows a form in which the router 1 is used stationary by using a stand. In the stand 12, the table 14 is fixed to the upper surface of the trapezoidal frame body 13, and the table 14 is fixed to the pair of ribs 15 and 15 fixed to the back surface of the table 14.
The countersunk screws 16 and 16 are respectively penetrated from the front side of the table, and each countersunk screw 16 is provided with a clamp plate 18 having an L-shaped cross section by a wing nut 17, and a bit through hole is formed in the center of the table 14. On the other hand, a ruler 20 is screwed on the front side so as to be slidably adjusted while forming 19. To attach the router 1 to the stand 12, the stand 15 is turned over and the wing nuts 17, 17 are loosened, and the ribs 15,
Set the base 7 between 15 and clamp plates 18,
The wing nuts 17 and 17 may be screwed in by applying the base 7 to the surface of the base 7, whereby the base 7 is clamped by the clamp plate 1.
The motor shaft 4 is fixed to the back surface of the table 14 via 8 and 18, and the motor shaft 4 is positioned coaxially with the through hole 19. Here, as will be described later, when the bit is mounted on the motor shaft 4 through the through hole 19 in an upward state and the distance between the housing 2 and the base 7 is adjusted, the tip of the bit projects from the table 14 and remains on the table 14 as it is. It is possible to use the material stationary for feeding the material to be processed.

The bit mounting structure is shown in FIG.
A chuck hole 21, which is a bottomed hole, is coaxially formed at the tip of the motor shaft 4 protruding from the housing 2, and the opening side of the chuck hole 21 has a tapered surface 22 having a diameter increasing toward the opening side. Has become. On the other hand, a male screw portion 23 is formed on the outer periphery of the tip of the motor shaft 4.
The collet nut 24 is screwed into the. The collet nut 24 has a through hole 25 for the bit, and the through hole 25
The inner surface of the collet cone 26 can be expanded and contracted by slits (not shown) formed alternately from the front and rear in the axial direction. There is. Therefore, when the collet nut 24 is screwed into the male screw portion 23, the collet cone 26 that moves to the inner side at the same time moves the tapered surface 22,
The diameter is reduced by the sliding contact between the 27 members. Reference numeral 28 is a spacer having a through hole 29 formed in the shaft center thereof, and has a columnar shape having an outer diameter that can be inserted into the chuck hole 21. A lightweight, highly accurate, and inexpensive polyamide is used. The spacer 28 can be prevented from falling into the chuck hole 21 by previously inserting the spacer 28 into the chuck hole 21 that faces upward during the stationary use. That is, when the total length of the bit 42 is substantially equal to or less than the depth of the chuck hole 21 and the outer diameter of the blade portion 44 is smaller than the inner diameter of the chuck hole 21, the collet nut 2
Even if it is inserted into the chuck hole 21 without tightening with 4,
As shown by the chain double-dashed line, the bit 42 does not fall a predetermined amount or more, and at least the protrusion from the chuck hole 21 is maintained so that it can be taken out by hand.

In FIG. 1B, a pin 30 having a flange 31 is provided below the housing 2 in a direction orthogonal to the motor shaft 4 and in the motor shaft 4 as shown in an enlarged view in a circle. 4 is loosely inserted and the compression spring 3
2 urges the motor shaft 4 away from the motor shaft 4.
The pin 30 is regulated at a position away from the motor shaft 4 by a circlip 33 located outside the flange 31, and a cap 34 is integrally fitted to the outer end of the pin 30. On the other hand, the chuck hole 21 in the motor shaft 4
As shown in FIG. 3, stopper holes 35, 35 into which the tips of the pins 30 can be inserted are formed on the outer circumference of the. Therefore,
When one of the stopper holes 35 of the motor shaft 4 is aligned with the axis of the pin 30 and the cap 34 is pushed toward the motor shaft 4 side, the pin 30 slides and the stopper hole 35.
The rotation of the motor shaft 4 is locked.

Stationary router 1 configured as described above
When mounting the bit 42, as described above, the pin 30 is pushed in to lock the rotation of the motor shaft 4, the collet nut 24 is slightly loosened, and the shank portion 43 of the bit 42 is passed through the through hole 25 of the collet nut 24. When the collet nut 24 is inserted into the collet cone 26 and the collet nut 24 is tightened again, the shank portion 43 is tightened by the collet cone 26 that reduces the diameter by sliding contact with the chuck hole 21, and the bit 42 is integrated with the motor shaft 4. However, the entire length of the bit 42 is the chuck hole 21 as described above.
If the outer diameter of the blade portion 44 is smaller than the inner diameter of the chuck hole 21 and is substantially the same as or less than the depth of, the spacer 28 is previously inserted into the chuck hole 21 as shown in FIG. 3 before inserting the bit 42. Then, the bit 42 is mounted by the above procedure. When the bit 42 is removed, if the collet nut 24 is loosened while the rotation of the motor shaft 4 is locked by pushing the pin 30, the collet cone 26 slides toward the outlet side of the chuck hole 21 to increase the diameter. Therefore, the tightening of the shank portion 43 is released. Where short bit 4
In the case of No. 2, although it falls in the chuck hole 21 as soon as the tightening is released, the falling is prevented by the spacer 28, so that the blade portion 44 is in a state of protruding from the through hole 25 of the collet nut 24. Therefore, it is possible to easily take out the bit 42 from which the tightening is released. As described above, according to the above-described embodiment, in the router 1 for stationary use, even if the bit has a short overall length, the chuck hole 2 can be formed by using the spacer 28.
Since it is possible to prevent more than a predetermined drop into 1, it is possible to take out easily when releasing the tightening, as with a bit with a long overall length. Therefore, the workability of removing the bit is improved. The spacer is not limited to the above-mentioned columnar shape as long as it can prevent the bit from falling, and can be appropriately changed to a prismatic shape, a sleeve shape, a rod shape, or the like, and the material can be synthetic resin other than polyamide, rubber, sponge, or the like. You may adopt it.

On the other hand, in the above embodiment, after using the short bit required for the spacer 28, when the long bit of the shank portion whose total length exceeds the depth of the chuck hole 21 is used, it is necessary to take out the spacer 28 from the chuck hole 21. There is
In this case, taking out the spacer 28 is troublesome. Therefore,
It is desirable that the spacer 28 itself can be easily taken out from the chuck hole 21. For example, in the normal router 1, when the shank portion 43 has a diameter smaller than the diameter at which the collet cone 26 can be tightened, an intermediate cylinder such as a collet sleeve is externally mounted on the shank portion 43, and the collet cone 26 is inserted through the intermediate cylinder. Although tightening is performed, if the lower end of the intermediate cylinder 36 is wholly or partially longer than the shank portion 43 as shown in FIG. 4, the bit 42 can be prevented from falling at the same time. However, in this case, the intermediate cylinder 36 of the bit 42
In order to prevent the inward falling, it is necessary to dimension the inner diameter of the intermediate cylinder 36 so that the shank portion 43 is lightly press-fitted. Alternatively, the inner diameter of the intermediate cylinder 36 may be stepped so that the inner side has a small diameter. Similarly, it is also desirable to be able to connect the spacer to the shank. Specifically, as shown in FIG. 5, the spacer 37 is a cylindrical body having a slit 38 and having a C-shaped cross-section, the diameter of which can be changed by elasticity. A tapered surface 39 that widens toward the front is formed. The inner diameter of the spacer 37 is
In order to prevent the shank portion 43 from falling, it is necessary to set the outer diameter of the shank portion 43 or less in the normal state. Therefore, according to the spacer 37, even if the tightening of the bit 42 having a short overall length is released, the spacer 3 can be prevented from falling, and the spacer 3 can be prevented.
If the bit 7 is unnecessary, once the bit 42 is pushed into the spacer 37 side, the lower end of the shank portion 43 is inserted into the spacer 37 to join the spacer 37, and the spacer 37 can be taken out at the same time as the bit 42 is taken out. Therefore, the replacement work can be smoothly performed when bits having different lengths are alternately used. Further, here, a stopper may be provided on the inner peripheral surface of the spacer 37 so as to restrict the insertion amount of the shank portion 43.

For the same purpose, as shown in FIG.
Is made of cylindrical rubber with a tapered surface 41 formed at the upper end,
The spacer 40 can be joined by inserting the lower end of the shank portion 43 into the opening above it. Also in this case, it is preferable to provide a wall portion, a protrusion, or the like on the inner peripheral surface of the spacer 40 to regulate the insertion amount. 5 and 6, if the inner diameter of the chuck hole 21 does not allow for the expansion and contraction of the spacers 37 and 40, the outer diameter of the spacers 37 and 40 may be made smaller so that the insertion by taking out a small-diameter bit or It may be performed by using another round bar. Furthermore,
In these forms, the bit 42 is pushed in at the time of taking out to enable the connection, but from the beginning, the shank portion 4
It is also possible to tighten the collet cone 26 with the spacers 37 and 40 coupled to the collet 3. In addition, a plurality of elastic pieces may be provided on the outer periphery of the upper end of the spacer in the axial direction to connect with the shank portion 43 or the like, or a spacer with a suction cup attached to the upper end may be used for connection by suction, or It is also possible to embed or stick a magnet on the upper end of the spacer to attract the magnet to the shank portion 43.

[0013]

According to the first aspect of the present invention, in the router for stationary use, even a bit having a short total length can be prevented from falling into the bottomed hole more than a predetermined amount by using the spacer. It can be taken out as easily as a long bit. Therefore, the workability of removing the bit is improved. According to the invention of claim 2,
Since the spacer can be connected to the shank portion of the bit, the spacer can be taken out at the same time as the removal of the bit. Therefore, when the spacer is not necessary, it can be easily taken out from the bottomed hole, which is convenient.

[Brief description of drawings]

FIG. 1A is a front view of a router. (B) It is a side view of a router.

FIG. 2 is an explanatory diagram showing a stationary use state using a stand.

FIG. 3 is an explanatory diagram of a bit mounting structure.

FIG. 4 is an explanatory diagram of a modified example of a bit mounting structure.

FIG. 5 is an explanatory diagram showing a modified example of a spacer.

FIG. 6 is an explanatory diagram showing a modified example of a spacer.

[Explanation of symbols]

1 ... Router, 2 ... Housing, 3 ... Motor, 4 ...
・ Motor shaft, 7 ・ ・ Base, 12 ・ ・ Stand, 14 ・
・ Table, 21 ・ ・ Chuck hole, 24 ・ ・ Collet nut, 26 ・ ・ Collet cone, 28,37,40 ・ ・
Spacer, 42 ... Bit, 43 ... Shank part.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B27C 5/10

Claims (2)

(57) [Claims] 1. A shank portion of a bit is inserted into a bottomed hole provided at the tip of a rotating shaft so that the shank portion can be mounted on the rotating shaft by a predetermined mounting means, while the mounting side of the bit is up. A router which is attached to a stand and can be used for stationary use, wherein when the stationary use is carried out by the stand, a predetermined amount with respect to the bottomed hole of the bit is set in the bottomed hole while being unmounted by the mounting means. A router characterized by inserting a spacer for preventing the above depression. 2. The router according to claim 1, wherein the spacer can be coupled to the shank portion of the bit.