JPS6221377Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a clamp for temporarily holding a workpiece such as a steel plate when drilling a hole in the workpiece. related to clamps used by attaching them to

When holding a power drill in your hand to drill a hole in a workpiece such as a steel plate, the tip of the drill may shake due to the hand being held, which may result in a larger drilled hole or unnecessary scratches on the machined surface. Drilling a hole perpendicular to the surface to be machined is extremely difficult.

The present invention was devised in view of the above-mentioned disadvantages.Since the workpiece can be reliably held when attached to a power drill, the tip of the drill blade does not run out with respect to the workpiece surface, and the workpiece can be machined easily. It is possible to always drill a hole perpendicular to the surface, and by using a clamping mechanism that uses parallel movement when clamping the workpiece, the contact surface with the workpiece always comes into contact with the surface, ensuring reliable clamping. Furthermore, this clamping operation can be easily performed with a single touch. A detailed explanation will be given below according to the drawings.

The main body 1 consists of a power drill attachment ring part 2, a drill blade guide part 3, and a bifurcated foot part 4. The power drill attachment ring 2 is formed in a cylindrical shape and is attached to the head of the power drill 16. The drill blade guide part 3 is
It has a contact surface 3a on its front surface, and a through hole 3b is bored in the center. The contact surface 3a is formed perpendicular to the axis of the through hole 3b. The bifurcated leg portion 4 protrudes in a bifurcated shape from the lower surface 1a of the main body 1, and is formed on the side wall 4a below. A screw hole 4b is screwed into this side wall 4a, and a screw 9 is screwed into the screw hole 4b. Also, the bottom surface 1 of the main body 1
a is formed parallel to the axis of the through hole 3b of the drill blade guide section 3. The sliding arm 5 is formed into a substantially L-shape, with an upper vertical portion formed as a pressing surface 5a and a horizontal portion formed as a sliding surface 5b. The pressing surface 5a is formed perpendicularly to the sliding surface 5b, and comes into contact with the contact surface 3a at the tip of the drill blade guide 3.
The main link 6 has a handle 10 on one side thereof,
An elongated hole 6a is bored in the other side, and the bifurcated leg portion 4 of the main body 1 is pivotally connected to the bifurcated leg portion 4 by a pin 11 so as to be freely rotatable. Pair of left and right secondary links 7, 7
is the horizontal rear end of the sliding arm 5 and the main link 6.
The two are rotatably connected to each other by pins 12 and 13, respectively. Note that the axial center position of pin 12 when the workpiece is clamped is between pin 11 and pin 13.
It is located slightly above the line connecting the respective axes in the drawing. The guide plate 8 for preventing lifting has a lug 8a at its rear end, and is attached to the main body 1 by a pin 14.
A pin 15 fixed to the rear part and attached to the bifurcated foot part 4 holds the sliding arm 5 so that it does not hang down, so that the horizontal part of the sliding arm 5 is positioned between the lift-preventing guide plate 8 and the lower surface 1a of the main body 1. It will be sliding.

To use the invented clamp with the above configuration,
Attachment ring part 2 of main body 1 to the head of power drill 16
Attach and secure with ring 17. Next, in the state shown in FIG.
It is located between the front contact surface 3a and the pressing surface 5a above the vertical part of the sliding arm 5, and lifts the handle 10 according to the processing position in the drawing. This handle 10
By lifting , the main link 6 also rotates upward. As a result, each pair of left and right sub links 7, 7
The sliding arm 5 which is pivotally connected to the main body 1 is also pressed backward, and the sliding surface 5b of the horizontal part of the sliding arm 5
The workpiece 19 is reliably held between the contact surface 3a and the pressing surface 5a.
At this time, the axis position of the pin 12 that pivotally connects the pair of left and right sub-links 7, 7 to the main link 6 is located slightly above the line connecting the axes of the pins 11 and 13 in the drawing. Therefore, even if the hand is released from the handle 10, the gripping state of the workpiece 19 will not be released inadvertently. When the power drill 16 is driven in this state, the drill blade 18 passes through the through hole 3b formed in the guide portion 3 of the main body 1 and is automatically fed out to drill a hole in the workpiece 19. After drilling is completed, by pulling up the handle 10 on the drawing, the axial center positions of the pins 12 are aligned with the pins 11 and 13.
Move up and down in the drawing from the line connecting each axis,
The main link 6, the pair of left and right sub links 7, 7, and the sliding arm 5 operate in the opposite manner to the above, and the fixed state of the workpiece 19 is released. When this handle 10 is pulled down, the pivot joints of the sliding arm 5 with the pair of left and right sub-links 7, 7 also receive a downward force at first, but a lifting prevention piece 8 is attached. The force is converted into a force in the forward direction, and the sliding arm 5 can always slide smoothly back and forth. Further, a screw 9 screwed into the side wall 4a of the bifurcated leg portion 4
By moving back and forth, the main link 6 can move back and forth by the length of the elongated hole 6a drilled in one of the main links, and accordingly, the sliding arm 5 also moves back and forth, causing its pressing surface 5a and main body to move back and forth. The gap between the contact surfaces 3a of 1 can be varied in various ways, and workpieces of various thicknesses can be clamped with optimum strength.

As described above, according to the present invention, since the present invention is attached to a power drill and used, and the drill blade 18 is held in the through hole 3b drilled in the guide portion 3 of the main body 1, the drill blade during drilling process. There is no need to run out at all, and as a result, the machined hole will never become large or the machined surface will be scratched.Also, since the sliding arm 5 always slides parallel to the main body 1, this sliding surface The vertically formed pressing surface 5 and abutment surface 3a can always clamp the workpiece at right angles to the drill bit 18, which enables reliable clamping through surface contact and also ensures a vertical hole in the workpiece. Furthermore, the screw 9 and the elongated hole 6a drilled in the main link 6 make it possible to clamp workpieces of various thicknesses with the desired strength. It is sufficient to simply move the handle 10 up and down to clamp and release the pin 1.
Due to the position of the axes 1, 12, and 13, the grip will not be released inadvertently, allowing safe work, etc.
Its practical effects are enormous.

[Brief explanation of the drawing]

Figure 1 is a front view of the invented clamp, Figure 2 is a left side view, Figure 3 is a right side view, Figure 4 is a plan view, and Figure 5 is a workpiece attached to a power drill. FIG. 6 is a front view before being clamped, and FIG. 6 is a cross-sectional view of the state in which it is attached to a power drill.

Claims (1)

[Claims for Utility Model Registration] (1) A main body 1 having a power drill attachment ring 2, a drill blade guide 3, and a bifurcated foot 4, and a sliding arm 5 that slides along the lower surface 1a of the main body 1.
, a main link 6 pivotally connected to the bifurcated foot 4 of the main body 1, and a pair of sub-links 7, 7 connected and pivotally connected to the main link 6 and the sliding arm 5,
A screw 9 screwed into the side wall 4a of the bifurcated leg portion 4
A clamp consisting of. (2) Claim No. 1 of the above-mentioned utility model registration claim, in which a lifting prevention guide plate 8 is attached to the rear of the main body 1.
Clamp described in (1).