JPH0512038U - Jigsaw blade holding structure - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a jig holding structure for a jigsaw, and an object thereof is to improve workability of attaching and detaching a blade without using a tool. A blade holding structure according to the present invention comprises a set piece 6 locked to a plunger 1, a screw 3 screwed into the plunger 1, a spring 4 arranged on the screw 3 and a hard member 5. ing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a jig holding structure for a jigsaw.

[0002]

[Prior Art]

 A jigsaw is a power tool that is frequently replaced because the blade has a relatively short life and it is necessary to select the blade according to the material and thickness to be cut. Conventionally, jigsaw blades are attached and detached by tightening and loosening the screws that hold the blades using tools such as spanners and drivers.

[0003]

[Problems to be solved by the device]

 The conventional blade holding structure requires tools such as a wrench and a screwdriver, which is troublesome and troublesome and has a drawback that these tools are easily lost. An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and simplify the attachment and detachment of the blade of the jigsaw.

[0004]

[Means for Solving the Problems]

 The above object can be achieved if the blade can be attached / detached without using a special tool such as a spanner or a screwdriver. Therefore, it is sufficient to provide a screw with an enlarged outer circumference of the head at the tip of the plunger so that it can be easily tightened by hand, and a spring for preventing loosening and a set piece for receiving a hard member and a blade at the tip of the screw. .

[0005]

[Action]

 In the blade holding structure configured as described above, by increasing the outer circumference of the head of the screw, sufficient axial force for holding the blade can be obtained without using a tool. In addition, the elastic force of the spring arranged at the tip of the screw portion of the screw causes the hard member to push the blade, and the reaction force acts outward in parallel to the axis of the screw to prevent the screw from loosening. When a force to pull the blade is applied, the projection of the blade is hooked on the claw of the set piece, and when a force to push the blade is applied, the upper edge of the blade collides with the inside of the plunger and the blade is released. It does not fall off easily.

[0006]

【Example】

 An embodiment of the present invention is shown in FIGS. As shown in FIG. 1, a set piece 6 is fixed inside the lower end of the plunger 1 via a pin 7, and a screw 3 is arranged on the opposite side in a screw-fitting manner with the plunger 1. The structure is such that the blade 2 is sandwiched by the screw 3. A cavity is provided at the tip of the screw 3, and a spring 4 and a hard member 5 are arranged in the cavity. As shown in FIG. 2, the set piece 6 is provided with a claw 6a so that the projection 2a of the blade 2 can be hooked. As shown in FIG. 3, the plunger 1 is provided with a blade abutting portion 1a for abutting the upper end portion 2b of the blade 2.

The holding state of the blade 2 will be described. When the blade 2 is hooked on the claw 6a of the set piece 6 locked by the plunger 1 and the screw 3 is tightened, the tip of the screw 3 abuts on the blade 2 and the blade 2 does not contact the screw 3 and the set piece 6. It is sandwiched and held. Since the screw 3 has a large head outer circumference, it can be easily tightened by hand. Further, since the spring 4 is pressed by the hard member 5 while the screw 3 holds the blade 2, the screw 3 is always pressed outward by the reaction force generated by the elastic force generated by the spring 4. Therefore, it does not come loose unless it is turned by hand. When a force pulling the blade 2 downward is applied, the protrusion 2a of the bread 2 is locked by the claw 6a of the set piece 6 and the blade 2 is locked, so that the blade 2 does not fall off. When a force that pushes the blade 2 upward is applied, the blade upper end portion 2b abuts against the blade abutting portion 1a provided on the plunger 1, and the blade 2 is locked. When the blade 2 is removed, it can be easily removed by loosening the screw 3.

[0008]

[Effect of the device]

 According to the present invention, the blade can be attached by hooking the blade on the set piece and tightening the screw by hand, and removing it by loosening the screw by hand. Is unnecessary.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view showing an embodiment of the present invention.

FIG. 2 is a partial perspective view illustrating an embodiment of the present invention.

FIG. 3 is a partial sectional view illustrating an embodiment of the present invention.

[Explanation of symbols]

1 is a plunger, 1a is a blade abutting portion, 2 is a blade, 3 is a screw, 4 is a spring, 5 is a hard member,
6 is a set piece, and 6a is a nail.

Claims (1)

[Scope of utility model registration request] 1. A jigsaw in which a blade is attached to the lower end of a plunger that is reciprocally moved in the vertical direction, and various blades are cut by the blade. Lock the set piece having a flat surface of the blade abutment inside so that the flat surface is parallel to the axis of the plunger, and provide the abutment portion of the blade upper end inside the plunger, and to the set piece. Is provided with a claw for locking the protrusion of the blade, a screw hole substantially orthogonal to the flat surface is provided at the lower end of the plunger, and a screw fitted so as to move back and forth is arranged in the screw hole. The screw holding structure of the jigsaw is characterized in that a spring and a hard member are arranged at the tip of the screw portion, and the outer circumference of the head of the screw is enlarged.