JPS6331873Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a tabletop drilling machine.

A tabletop drilling machine has a head that is supported by a column that stands upright on a base, and a drill is attached to the hollow part of the head and rotatably supports a rotating main shaft, and a rack is attached to the outer periphery of the head. It has a quill provided, a pinion shaft having a pinion that meshes with the rack of the quill, etc. One end of the pinion shaft is attached to the side wall of the head via a helical spring, and the other end is attached to the side wall of the head via a handle holding member provided on the head. The quill is provided with a hole into which a member for separating the drill from the main shaft is inserted.

In the table-top drilling machine configured in this way, a drill or the like is attached to a tapered hole such as a Morse taper provided at the tip of the main spindle, and drilling is performed. In this case, in order to minimize deflection of the spindle due to cutting or the like and improve drilling accuracy, a tapered hole is provided in the quill to prevent the tip of the spindle from protruding as much as possible from the quill that supports the spindle. In order to detach the drill or the like from the main shaft, it is necessary to lower the quill and apply an external force to the drill tang by inserting a member such as a screwdriver through a hole formed in the quill. However, in the case of a general tabletop drilling machine, the main shaft and the quill are returned upward by the spring force of a spiral spring installed on the pinion shaft that lowers the main shaft after the active feeding of the main shaft is completed. In order to detach a drill or the like from the main shaft, it is necessary to apply an external force by inserting a member such as a screwdriver into the quill that applies an external force to the drill tongue while holding the handle. For this reason, it is not possible to hold the drill during detachment work, and the drill falls, causing not only scratches and dents on the work surface and drilling parts, but also poses a danger.

This invention was created in view of the above points,
The object of the present invention is to provide a tabletop drilling machine that can prevent the drill from falling during drill detachment work.

That is, the present invention is characterized in that the handle holding member is provided with a pin that prevents the handle holding member from rotating when the dowel hole falls a predetermined distance below the bottom surface of the head.

Hereinafter, the present invention will be explained based on the illustrated embodiments. An embodiment of the present invention is shown in FIGS. 1 to 4. As shown in the figure, the tabletop drilling machine has a head 1 with a taper hole 2, such as a Morse taper, on which a drill (not shown) is attached at one end.
A quill 4 supporting a main shaft 3 having a shape thereon is gripped, and a rack 5 is provided on the outer periphery of the quill 4. A screw hole 6 is provided at the end of the tapered hole 2 of the main shaft 3 and at the outer periphery of the quill 4, into which a member such as a screwdriver for removing the drill is inserted. A helical spring 9 is engaged with one end of the pinion shaft 7, and a handle holding member 10 is fixed to the other end by press-fitting or the like. This handle holding member 10 has a handle 11
is fixed, and by rotating the handle 11, the quill 4, that is, the main shaft 3, moves directly. In the figure, 12 is a column that stands upright on the base and supports the head 1, and 13 is a motor that rotates the main shaft 3.

In the tabletop drilling machine configured as described above, in this embodiment, the handle holding member 10 is provided with a pin 14 that prevents the handle holding member 10 from rotating when the screw hole 6 is lowered by a predetermined distance below the bottom surface of the head 1.
has been established. Then, the pin 14 is inserted through the compression spring 16 into a stepped through hole 15 formed in the handle holding member 10 substantially parallel to the pinion shaft 7, and the end thereof is inserted into the through hole 15 formed in the side wall of the head 1. It was formed by a stepped pin inserted into a hole 17 with a larger diameter. Note that in the vicinity of this through hole 15, 18 is a stopper. By doing this, the return movement of the main shaft 3 and the quill 4 is stopped, and it is possible to obtain a tabletop drilling machine that can prevent the drill from falling during the drill detachment operation.

That is, the pinion shaft 7 is attached to the handle holding member 10.
A through hole 15 was drilled almost parallel to the hole 15, and the pin 14 was inserted into the drilled through hole 15, but the through hole 15
A compression spring 16 is inserted between the stepped portion drilled and formed in the pin 14 and the stepped portion formed in the pin 14, and the spring force of the compression spring 16 causes the pin 14 to protrude from the handle holding member 10. I did it like that. There is a hole 17 in the side wall of the head 1 into which the end of the pin 14 is inserted when the handle 11 is rotated and the pin 14 is inserted into the socket hole 6 at a position where the socket hole 6 protrudes from the bottom surface of the head 1. was formed with a diameter larger than the outer diameter of the pin 14. By doing this, the pin 14 protrudes from the handle holding member 10 due to the restoring force associated with the compressed length of the compression spring 16, so that a force greater than the restoring force of the compression spring 16 is applied to the axis of the pin 14. The pin 14 will not move unless applied in a direction. Then, operate the handle 11 to
Lower the handle holding member 10 until its locking hole 6 is below the bottom of the head 1 (see Figure 2).
When the handle 11 is further operated while lightly pressing the pin 14 inserted into the through hole 15 provided in the head, the end of the pin 14 and the hole 17 provided in the side wall of the head are inserted.
(see FIG. 3), and the pin 14 can be manually inserted into the hole 17. In this way, the pin 14 is pressed against the wall of the hole 17 by the action of the helical spring 9, and the frictional force generated between the pin 14 and the wall of the hole 17 is set to be larger than the restoring force of the compression spring 16. Therefore, the pin 14 does not protrude from the handle holding member 10, the rotation of the handle holding member 10, that is, the return movement of the main shaft 3 and the quill 4 is stopped, and the operator can hold the drill without holding the handle 11. It becomes possible to apply an external force to a member such as a lever that detaches the drill, and it is possible to prevent the drill from falling. It also prevents the drill from falling, preventing damage to the work surface and drilling parts.
It is possible to prevent the occurrence of dents, and it is possible to prevent the occurrence of danger.

To restore the pin 14, the handle 11 can be operated. In other words, the operator
When the hole 17 is larger than the diameter of the pin 14, a portion where the frictional force is released is created between the pin 14 and the hole 17, and the pin 14 protrudes from the handle holding member 10 due to the restoring force of the compression spring 16. do. Furthermore, when a drilling machine is used for drilling, etc., an external force is applied to the pin 14 due to the vibration of the main body, but the pin 14 is operated by the handle by the restoring force of the compression spring 16 as described above. Since the pin 1 protrudes from the holding member 10, unless the operator manually
4 is not inserted into the hole 17, therefore, the pin 14 is not automatically inserted into the hole 17 and fixes the main shaft 3 and the quill 4 during work.

As mentioned above, this invention allows the drill to be detached without holding the handle, making it possible to prevent the drill from falling, making it possible to prevent the drill from falling during drill detachment work. You can get a tabletop drilling machine with this design.

[Brief explanation of the drawing]

Fig. 1 is a side view of the head of an embodiment of the tabletop drilling machine of the present invention, Fig. 2 is a side view of the area around the main shaft of the same embodiment when the main shaft is lowered, and Fig.
FIG. 4 is a sectional view taken along the line A--A in the figure, and FIG. 4 is a longitudinal sectional side view of the area around the main spindle mounting portion of an embodiment of the tabletop drilling machine of the present invention. 1...Head, 3...Main shaft, 4...Quill,
5...Rack, 6...Socket hole, 7...Pinion shaft, 8...Pinion, 9...Spiral spring, 10...
...Handle holding member, 11...Handle, 12...
...Column, 14...Pin (stepped pin), 15...
Through hole, 16... compression spring, 17... hole.

Claims (1)

[Claims for Utility Model Registration] A cylindrical quill disposed within the head, a pinion shaft horizontally supported by the head and having a pinion that engages with a rack provided on the outer periphery of the quill, and one end of the pinion shaft. A helical spring is provided on the quill and always biases the pinion shaft in a direction to raise the quill, and a handle holding member is provided on the other end of the pinion shaft, and the quill and the main shaft supported on the inner diameter of the quill are fixed in a predetermined position. In a tabletop drilling machine having a slotted hole passing through both at a position, a through hole is formed in the handle holding member substantially parallel to the pinion shaft, and the handle holding member is inserted into the through hole via a compression spring and is constantly inserted into the handle holding member. A pin is provided that is biased outwardly, a hole is formed in the side wall of the head corresponding to the position of the through hole, and when the tip of the pin is engaged with the hole provided in the side wall of the head, the tip of the hole is pressed outward. A tabletop drilling machine characterized by fixing the main shaft with the head exposed below.