JPH0260446B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a screw seat forming device that forms screw seats for a plurality of hinge fixing screws at once. The present invention relates to a position adjustment mechanism for a countersinking blade of a drill provided in a drill.

[Conventional technology]

Typically, the hinge is secured to the door with two to four screws. When fixing the hinge slats in a hidden state inside the door, screw seats are formed in correspondence with the number of screws to sink the screw heads into the door side. A multi-spindle drill-like screw seat forming device for forming such screw seats all at once has been proposed by the present applicant (Japanese Patent Application No. 112599/1982).

With this device, the drill can be attached and detached for purposes such as replacing or polishing the drill. Specifically, as shown in FIG. 9, a drill 7 is attached to the bulleted output shaft 6 of the drive mechanism 2.
The shank 24 was inserted, and the shank 24 was fixed with a set screw 27 screwed from the circumferential surface of the output shaft 6. In this case, the stepped wall 25 of the shank 24 is connected to the output shaft 6.
It comes into contact with the lower end wall 32 of the counterbore to position the countersinking blade 23 and to receive the thrust force.

[Problem that the invention seeks to solve]

In the conventional drill mounting structure as described above,
When polishing the drills 7 or replacing some of the drills 7 in a set, variations may occur in the axial position of the countersink blades 23, and the depths of the set of screw seats may become uneven. This is because the counterbore blade 23 is positioned with the step wall 25 in contact with the output shaft 6. To align the depth of the screw seat, an adjustment shim or washer is used to countersink the counterbore blade 23. It was necessary to adjust the position of the

If the depth of the screw seat is inappropriate, various problems will occur during use. For example, if the screw seat is too deep when the machined surface does not have sufficient thickness, such as a door made of steel, the screw head will hit the hinge first, making it impossible to fix the hinge. On the other hand, if the screw seat is shallow, the screw head will protrude from the side end surface of the door and interfere with the opening frame or catch clothes.

[Purpose of the invention]

The present invention provides a device for forming screw seats for fixing a hinge, in which the position of a countersink blade formed on a drill can be easily adjusted, and the depth of a set of screw seats can be appropriately formed. With the goal.

[Means for solving problems]

The problem with the conventional device is that it has a structure in which the output shaft 6 directly receives the thrust force acting on the drill 7.

In this invention, from this point of view, as shown in FIG. 1, the adjustment screw mechanism 28 provided at the shaft end of the output shaft 6 is made to receive the thrust force, and the receiving position can be changed and adjusted. The position of the countersink blade 23 can be easily adjusted.

Specifically, a fixed screw member 29 is formed on the output shaft 6, and a thrust receiving surface 32 of a movable screw member 30 that engages with the fixed screw member 29 receives and supports the positioning step portion 25 of the drill 7. If necessary, the movable screw member 30 is prevented from rotating with a lock nut 31. In the embodiment shown in FIG. 1, the movable screw member 30 is shaped like a nut, but this is not necessarily necessary, and it may be shaped like a cylindrical bolt as shown in FIG.

[Effect]

If the position of the countersink blade 23 becomes uneven due to replacing or polishing the drill 7, remove the lock nut 3.
1 is loosened, and the movable screw member 30 is moved forward and backward by screwing in to change the position of the thrust receiving surface 32. In this state, the positioning step portion 25 is brought into contact with the thrust receiving surface 32, and if the positions of the set of counterbore blades 23 match, the movable screw member 30 is locked by the lock nut 31. If further adjustment is necessary, operate the movable screw member 30 to adjust the thrust receiving surface 3.
Adjust the position of 2 to an appropriate position.

〔Effect of the invention〕

According to the present invention as described above, when forming a plurality of screw seats 20 on the door D at the same time, the position of the counterbore blade 23 can be easily adjusted, so that the depth of one set of screw seats 20 can always be adjusted appropriately. It can be made into something. This eliminates problems caused by variations in the depth of a set of screw seats 20, such as the hinge H not being able to be fixed or the screw head protruding.
This means that the screw seat 20 can be formed efficiently.

Moreover, compared to the case where the position of the countersink blade 23 is adjusted using a washer or an adjustment shim, it is advantageous in that the adjustment work can be performed accurately in a short time.

〔Example〕

1 to 6 show a first embodiment in which the present invention is applied to a horizontal screw seat forming device.

In FIG. 6 without FIG. 3, the screw seat forming device has a drive mechanism 2 between the front and rear frames of a square frame-shaped frame 1.
This is supported by a guide mechanism 3A consisting of a pair of left and right guide shafts 3, 3 so as to be slidable back and forth, and an electric drill body 5 is attached to the rear end of the drive mechanism 2 via a holder 4.
is fixed, and a drill 7 is fixed to each of the four output shafts 6 protruding from the front end of the drive mechanism 2, so that these can be driven to rotate at the same time.

The drive mechanism 2 is linearly moved forward and backward by a handle 8 provided on the side frame of the frame 1, and a pin-on 9 that rotates together with the handle 8 feeds and moves a rack 10 fixed to the side end of the drive mechanism 2, thereby moving back and forth. do. Reference numeral 11 indicates a grip provided for holding the entire device down, and reference numeral 12 indicates a positioning member.

In FIGS. 5 and 6, the drive mechanism 2 includes a gear box 14, an input shaft 15 located at the center thereof, and a gear group 16a, 16b arranged to surround the input shaft 15 and rotated simultaneously. It consists of an output shaft 6, etc.

The input shaft 15 protrudes rearward from the gear box 14, and is connected to the chuck 5 of the electric drill body 5.
By gripping and fixing with a, the power from the electric drill main body 5 is inherited. The output shaft 6 is arranged in the same shape as the screw hole 17 of the hinge H shown in FIG. For this reason, the vertical interval between the output shafts 6 has become smaller, and by arranging the driven gears 16b, 16b fixed to the output shafts 6, which form a pair of upper and lower parts, by shifting them back and forth, the driven gears 16b, 16b, 16b to avoid interference with each other. Two driving gears 15a are fixed to the input shaft 15 in correspondence with the driven gears 16b, 16b.

The holder 4 is fixed to the gear box 14, and a tightening flange 4a at the rear end connects the electric drill body 5.
Hold and secure the neck of the patient. Therefore, the electric drill main body 5 moves together with the drive mechanism 2.

As shown in FIG. 7, a mounting groove 18 for inserting the hinge H is pre-formed in the door D, and by fitting the positioning member 12 into the mounting groove 18, the frame 1 can be positioned with respect to the door D. conduct. The positioning member 12 consists of a base plate 12a that is removably fixed to the frame 1 with screws, and an engagement piece 1b that projects from the lower surface of the base plate 12a.
By setting the frame 1 on the door D in a state in which the frame 2b is engaged with the mounting groove 18, a machined state is obtained in which the front end wall of the frame 1 is in close contact with the machined surface of the door D due to the weight of the entire apparatus. The engagement piece 12b is in the mounting groove 1
It is formed in almost the same shape as 8. As shown in Figure 6, the doors D are stacked in a staggered manner.
Screw seat 20 while transferring the screw seat forming device in order.
By forming this, the screw seats 20 can be efficiently formed on a large number of doors D. In order to carry out such processing, the front bottom surface of the frame 1 has a notch 1a to avoid interference with the lower door D.

The present invention is characterized by the attachment of the drill 7 in the screw seat forming apparatus as described above.

In FIG. 1, the drill 7 is the hinge fixing screw 21.
A drilling blade 22 for forming an insertion hole (see Fig. 7) and a countersinking blade 23 for forming a screw seat 20 are formed next to each other, and a shank 24 rearward from the middle part is formed into the main body. A positioning step portion 25 is formed at the base end of the shank 24 with a smaller diameter than the side. A flat anti-rotation surface 26 is formed on the circumferential surface of the shank 24, and when the shank 24 is inserted into the mounting hole 6a of the output shaft 6, a set screw 27 screwed into the circumferential surface of the output shaft 6 is attached to the anti-rotation surface. By pressing and fixing 26, rotational power is inherited from the output shaft 6.

In order to adjust the axial position of the countersink blade 23,
An adjustment screw mechanism 28 is provided at the shaft end of the output shaft 6. This adjustment screw mechanism 28 includes a fixing screw member 2 that is integral with the output shaft 6 and has a male thread formed on its outer periphery.
9, a movable screw member 30 that is screwed into this and moves back and forth, and a lock nut 31. The movable screw member 30 is formed in the shape of a hexagonal nut, and has a flat thrust receiving surface 32 at its side end.
The movable screw member 30 is screwed into the fixed screw member 29 to adjust the position of the thrust receiving surface 32, which receives and supports the positioning step 25 of the drill 7, thereby adjusting the axial position of the countersinking blade 23. For example, when the screw seat 20 is deep, the movable screw member 30 is moved toward the drive mechanism 2 side, and the screw seat 20 is deep.
If it is shallow, move it in the opposite direction.

The shape of the counterbore edge 23 of the drill 7 is made to match the shape of the head of the hinge fixing screw 21. Therefore, when using a screw with a head shape other than the countersunk screw shown in the illustrated example, the counterbore blade 23 is shaped like an end mill.

The screw seat forming device configured as described above is set on the door D as shown in FIG. 6, and by swinging the handle 8 toward the electric drill body 5, the drive mechanism 2 and the drill 7 Moving forward, the drilling blade 22 first forms a screw insertion hole, and then the counterbore blade 23 forms a screw seat 20. In order to limit the forward movement limit of the drill as a whole at this time, a stopper 33 is attached to one side of the guide shaft 3 so that its fixed position can be changed as shown in FIG. This stopper 33
consists of a C-shaped ring 33a and a fixing screw 33b screwed between the split surfaces of the ring 33a.

In the above machining state, the mounting position of the handle 8 is determined so that the drilling blade 22 comes into contact with the machining surface of the door D with the handle 8 tilted toward the electric drill body 5 side. That is, the drill 7 bites into the machined surface of the door D with a downward moment acting on the frame 1, thereby preventing the frame 1 from lifting up during drilling. When scolded,
The screw seat 20 can be formed without using a means for attaching the frame 1 to the door D, such as a clamp means or a magnetic fixing means.

[Another example]

FIG. 8 shows a second embodiment of the invention. In this case, the movable screw member 30 is formed with a male thread, and the fixed screw member 29 is formed with a female thread. Further, the fixing screw member 29 is formed separately from the output shaft 6 and is attached to the output shaft 6 so that it can rotate freely but cannot move in the axial direction. For this purpose, a circumferential groove 35 is formed in the output shaft 6, and a bolt 36 passing through the wall of the fixing screw member 29 is engaged with the circumferential groove 35.

In addition to the above, the main body side of the drill 7 and the shank 2
4 have the same diameter, the positioning step portion 25 may be set by fixing a ring-shaped flange to the drill 7.

The lock nut 31 may be omitted; for example, a lock washer may be used to prevent the movable screw member 30 from rotating.

In the illustrated example, the screw seat forming device is of horizontal type, but it goes without saying that it may be of vertical type.

Further, the drill 7 may include only the countersinking blade 23.

[Brief explanation of drawings]

1 to 7 show a first embodiment of the screw seat forming device according to the present invention, FIG. 1 is a longitudinal cross-sectional side view of the main part showing the drill mounting structure, and FIG.
3 is an external perspective view of the entire device, FIG. 4 is a plan view, FIG. 5 is a sectional view taken along B-B in FIG. 4, and FIG. 6 is a vertical sectional side view. FIG. 7 is an exploded perspective view of the door and hinge. FIG. 8 is a longitudinal sectional side view of the main parts showing a second embodiment of the present invention. FIG. 9 is a longitudinal sectional side view of the main parts of a conventional example. 2... Drive mechanism, 3A... Guide mechanism, 6... Output shaft, 6a... Mounting hole, 7... Drill, 20...
Screw seat, 22...Drilling blade, 23...Spot facing blade,
25...Positioning stepped portion, 28...Adjustment screw mechanism,
29... Fixed screw member, 30... Movable screw member,
31... Lock nut, 32... Thrust receiving surface,
H...Hinge, D...Door.

Claims (1)

[Claims] 1 a plurality of drills 7 each having a countersinking blade 23;
In a screw seat forming device for fixing a hinge, comprising a drive mechanism 2 that simultaneously drives each drill 7, and a guide mechanism 3A that supports the drills 7 and the drive mechanism 2 so as to be able to move forward and backward with respect to the machined surface of the door D. , drill 7
A positioning step 25 and a shank 24 are respectively formed in the drive mechanism 2, and the output shaft 6 of the drive mechanism 2 has a mounting hole 6a into which the shank 24 is inserted. An adjustment screw mechanism 28 for adjusting the axial position of the countersink blade 23 is provided, and the adjustment screw mechanism 28 includes a fixed screw member 29 held on the output shaft 6 and a movable screw member screwed into the screw member 29 to advance and retreat. 30, the movable screw member 3
A screw seat forming device for fixing a hinge, in which a thrust receiving surface 32 is formed on the outer end surface of the screw seat 32 to come into contact with the positioning step 25 of the drill 7.