JPH0143202Y2 - - Google Patents

Description

[Detailed description of the invention] When using a conventional electric square chisel drilling machine to perform drilling work on girders, beams, etc. of wooden structures, the material to be drilled is held and fixed between two guide plates. , The outline of the mortise hole to be drilled is drawn accurately in advance on the material to be drilled by marking, and the drilling operation is carried out along the outline with a square chisel facing the position.
It is necessary to always mark the shape of the mortise hole to be drilled, and this has the disadvantage that it significantly impedes the progress of the drilling process, and improvements to this problem have been sought by the construction and woodworking industries alike.

The present invention answers that need.

The embodiment of the present invention will be explained in detail with reference to the attached drawings. , mark the indicator line 3 that coincides with the center position L' of the length L of the mortise hole B to be drilled.
In addition to attaching the horizontal gauge plate 2 that indicates , a vertical gauge plate 4 that indicates the indicator line 5 that coincides with the vertical center line C of the mortise hole B to be drilled is attached to the horizontal moving seat 6 of the square chisel 7 for drilling. 8 is the machine frame of the square chisel drilling machine, 9 is the leg of the machine frame, 10 is a spiral rod for lifting and lowering the square chisel, 11 is a grip for transportation, 12 is a tightening grip for the guide plate 1, 13 is a cross-feeding handle of the movable seat 6 for cross-feeding the square chisel for drilling.

Material A to be perforated using this equipped electric square chisel perforator
To explain the case of drilling a mortise hole B in a girder material, only marking is performed to indicate the center position L' of the length L of the mortise hole B, and unlike the conventional drilling method, the entire mortise hole is marked. This saves the effort of drawing the shape by marking. That is, the girder material A, on which only the longitudinal center line C and the center position L' of the length L of the mortise hole B is marked, is held between two guide plates 1 and 1' installed in the machine frame 8 of the drilling machine. , First, move the rear corner chisel 7 back and forth so that it matches the vertical center line C marked on the girder material A and the indication line 5 marked on the vertical gauge plate 4 attached to the cross-feeding moving seat 6 of the square chisel 7. By moving and aligning the indicator line 3 of the horizontal gauge plate 2 with the center position L' of the length L of the mortise hole B to be drilled, the drilling position in the girder material can be easily determined, and then the square chisel is If you perform the drilling work by lowering the hole, you can always form an accurate mortise in the predetermined position.As with the conventional mortise forming method, the square chisel is carefully placed along the pre-marked outline of the mortise. There is no need to move the vertical and horizontal gauge plates 4, 2 to the vertical center line C of the girder material A, and the drilling position of the mortise hole B can be easily and accurately determined. By forming a mortise having a unique shape, the drilling operation can be carried out smoothly and quickly, and the working efficiency of mortise formation can be significantly promoted.

In this way, the complicated labor of marking the contour of the mortise hole on the material to be drilled for each mortise hole is saved, the efficiency of drilling work is improved, and the woodworking and construction industry is greatly benefited and advanced. It is a technical invention.

[Brief explanation of drawings]

The attached drawings show examples of the present invention,
Fig. 1 is a perspective view of an electric square chisel drilling machine equipped with the present invention, Fig. 2 is a partially enlarged plan view showing the state in which the material A to be drilled is held, and Fig. 3 is shown along the line X-X in Fig. 2. 4 is a perspective view of the horizontal gauge plate, and FIG. 5 is a perspective view of the vertical gauge plate. 1...Guide plate, 1'...Guide plate, 2...Horizontal gauge plate, 3...Indication line, 4...Vertical gauge plate, 5...Indication line, 6...Movement seat for traversing,
7... Square chisel, 8... Machine frame, 9... Machine frame legs, 1
0...Spiral rod for lifting square chisel, 11...Grip for transportation, 12...Grip for tightening, 13...Handle for horizontal feeding, A...Material to be drilled, B...More hole, L...More hole Length, L'... Center position of the length of the mortise hole, C...
...The vertical center line of the material to be drilled.

Claims (1)

[Scope of utility model registration request] In an electric square chisel drilling machine, an indicator line that matches the center position of the length of the mortise hole to be drilled is marked on the upper end surface of one of the two guide plates that sandwich and fix the material to be drilled. An electric square chisel characterized in that a horizontal gauge plate is attached to the horizontal movement seat of the drilling square chisel, and a vertical gauge plate is attached to the moving seat for horizontal movement of the drilling square chisel. A drilling position indicating device for a drilling machine.