JPH04109875U - Percussion tool tip tool holder - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to improve the life of the parts that make up the cage. [Configuration] When the stop lever 4a is struck, the tip tool 3
The stop lever 4a is rotated by the rotational torque generated by the collision between the stop lever 4a
rotates, and the side of the tip tool 3 is attached to the inner wall 6 of the front cover 6.
It is characterized in that it is formed by providing a pressing corner 11 that is pressed against the corner a. [Effect] Even if the tip tool is released from the workpiece after impact, the side of the tip tool will be pressed against the inner wall of the front cover by the stop lever.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a tip tool holder for an impact tool.

0002

[Conventional technology]

4 to 6 show conventional examples of tip tool holders for impact tools. of air Due to compression, the striking element 1 strikes the intermediate striking element 2 and applies striking force to the tip tool 3 (Fig. (see 4). The stop lever 4 that holds the tip tool 3 on the main body is moved in the E direction by a spring 5. It is urged in the direction and is locked to the front cover 6. On the other hand, spring case 7 It is biased by a spring 5 in a direction opposite to the E direction. After impact, from the workpiece to the tip Even if the tool 3 is released, the tip tool 3 will collide with the stop lever 4 and fly forward. (See Figures 5 and 6). In addition, 8 in Figure 5 is a knob. 9 is a stepped portion of the front cover 6.

0003

[Problem that the idea aims to solve]

Conventional tip tool holders release the tip tool from the workpiece after impact. When the end tool collides with the stop lever, the end tool and the stop lever become the same rigid body. Because of the ambition, the tip tool bounced off the stop lever and pushed the intermediate striker back. vinegar. The pushed back striker hits the intermediate striker, causing the tip tool to be removed from the workpiece. Even if the ball is released, the blows will be repeated in a certain period (this phenomenon is called a dry hit). child Therefore, the life of parts such as the stop lever and tip tools that make up the retainer is short. There was a problem.

0004 This invention was developed in consideration of the above points, and aims to extend the life of the parts that make up the cage. The purpose is to provide a tip tool holder for impact tools that allows for improved performance. It is something that

[0005]

[Means to solve the problem] The above purpose is to remove the stop lever so that the tip tool collides with it after impact. The stop lever is rotated by the rotational torque generated by the collision prevention corner and the collision. It is formed by providing a pressing corner that moves and presses the side of the tip tool. This is achieved by

[0006]

[Effect]

With the provision of the above means, even if the tip tool is removed from the workpiece after impact, the tip tool will continue to slide. The side of the top lever will be pressed against the inner wall of the front cover, Dry firing will be prevented.

[0007]

【Example】

Next, the present invention will be specifically explained using examples. Figures 1 to 3 show the fruits of this invention. Examples are shown. In addition, the same parts as before are given the same symbols, so the explanation will be simplified. Omitted. In this embodiment, the tip tool 3 collides with the stop lever 4a after hitting it. Due to the corner portion 10 for preventing slipping out and the rotational torque generated by the collision, The stop lever 4a rotates and presses the side of the tip tool 3. It was formed by providing a corner part 11 for hanging. By doing this, after impact, the workpiece material Even if the tip tool 3 is released from the stop lever 4a, the side of the tip tool 3 is It is pressed against the inner wall 6a of the tokaba 6 to prevent dry firing. The tip of a striking tool that makes it possible to improve the life of the parts that make up the cage. A tool holder can be obtained.

[0008] In other words, the stop lever 4a has a mechanism that prevents the tip tool 3 from slipping out forward. A corner part 10 for preventing slipping out, a corner part 11 for pressing the side surface of the tip tool 3, and is provided and is locked to the front cover 6 so that it can rotate within a certain range. Ru.

[0009] When the tip tool 3 is released from the workpiece after the impact, the tip tool 3 abuts against the slip-out prevention corner 10 of the stop lever 4a. When the stop lever 4a reaches the contact point, as shown in FIG. It is inserted between the inner wall 6a and the tip tool 3 is locked. Further, by rotating the stop lever 4a by 1800 ^degrees from the position shown in FIG. 1, the tip tool 3 can be attached or detached. During operation, in order to prevent the stop lever 4a from rotating 180 degrees and the tip tool 3 from falling out, a step 9 is provided on the front cover 6 as shown in FIG. 3, and the angle at which the knob 8 of the stop lever 4a is When it rotates, it hits the stepped portion 9 and is configured to prevent further rotation.

0010 In FIG. 3, the knob 8 of the stop lever 4a is on the B side of the stop lever 4a in FIG. Along with the rotation in the direction, it rotates in the same direction (direction C). The knob 8 rotates in the C direction and the flap The rotation angle of the front cover 6 until it hits the stepped part 9 is β°, and the stop is set as shown in Fig. 2. The pressing corner 11 of the lever 4a rotates in the direction B and hits the side of the tip tool 3. If the rotation angle until the end is α°, the pressing corner 11 presses the side of the tip tool 3. In order to attach the angle, it is configured so that β°>α°.

[0011] In this way, according to this embodiment, the stop lever prevents the tip tool from coming out forward. The corner part prevents the stop lever from slipping out, and the rotational torque generated in the stop lever A pressing corner is provided to press the side of the tip tool, so the tip tool cannot be locked. This can prevent blank firing. Therefore, holding stop levers, tip tools, etc. It is possible to improve the lifespan of the parts that make up the device.

0012

[Effect of the idea]

As mentioned above, the present invention improves the life of the parts that make up the cage. , a tip tool for impact tools that makes it possible to improve the life of the parts that make up the cage. You can get a retainer.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of an embodiment of a tool holder for an impact tool according to the present invention.

FIG. 2 is a longitudinal sectional side view showing a case where the stop lever is rotated in FIG. 1;

FIG. 3 is a front view corresponding to the same embodiment as seen from direction A in FIG. 5;

FIG. 4 is a longitudinal cross-sectional side view of a main part of a conventional impact tool.

5 is a sectional view taken along line DD in FIG. 4. FIG.

FIG. 6 is a longitudinal sectional side view of a tip tool holder of a conventional impact tool.

[Explanation of symbols]

3... Tip tool, 4a... Stop lever, 6... Front cover, 8... Knob part, 9... Step part, 10... Corner part for preventing coming off, 11... Corner part for pressing.

Claims (2)

[Scope of utility model registration request] 1. A stop lever for holding the tip tool and preventing it from coming off, the stop lever having a knob, and disposed on a front cover perpendicular to the tool axis, the front cover having a stop lever. In the tip tool holder of the impact tool, which is provided with a stepped portion, the stop lever is connected to a corner portion for preventing the tip tool from coming off against which the tip tool collides after impact, and the stop lever is moved by the rotational torque generated by the collision. A tip tool holder for an impact tool, characterized in that it is provided with a pressing corner that rotates and presses a side surface of the tip tool. 2. The impact tool according to claim 1, wherein the stop lever is configured such that when the stop lever rotates a predetermined angle during operation, it abuts against a stepped portion of the front cover and does not rotate any further. Tip tool holder.