JPH06155332A - Switch mechanism of electrically-driven hydraulic tool - Google Patents

Abstract

PURPOSE:To provide a switch mechanism of an electrically-driven hydraulic tool capable of easily operating by one hand and certainly preventing maloperation even in the case of doubly placing a main switch button and a hydraulic release button and operating either of them. CONSTITUTION:On a handle part on a lower part of a case of an electrically- driven tool storing a hydraulic release mechanism, a main switch button 3 for motor drive and a hydraulic release button 4 to actuate the hydraulic release mechanism through a lever 5 are doubly placed and arranged. In the neighbourhood of the main switch button 3 and the hydraulic release button 4, a stop lever 6 to prevent movement of the hydraulic release button 4 and to automatically return by a spring and a spring stay 8 to automatically return when the hydraulic release button 4 is pressed and released are arranged, and additionally, they are arranged so that a part of the hydraulic release button 4 comes to a position to prevent rotation of the stop lever 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch mechanism for an electric hydraulic tool used in an electric work for cutting an electric wire or crimping a terminal or a work for cutting a steel material. The present invention relates to a switch mechanism of an electric hydraulic tool that can be operated by a user.

[0002]

2. Description of the Related Art In electric installation work for laying or replacing electric wires, an electric hydraulic tool for crushing or cutting a crimp terminal is used to connect the electric wires. Previously, a hydraulic tool was used that connected a pressure-resistant hose between the hydraulic pump on the ground and the tool head of a worker who works at a high place such as laying overhead lines. Since there are problems that the hose gets in the way and the degree of freedom is low and it is difficult to operate, an electric hydraulic tool that combines a planetary gear speed change mechanism and a hydraulic mechanism that is portable and motor driven is recently used. It is like this.

FIG. 5 shows an example of a switch mechanism portion including a part of a cam plunger mechanism 20 (hydraulic mechanism) of a conventional electric hydraulic tool. That is, an eccentric shaft 21 that constitutes the cam plunger mechanism 20 applies a rotational force by a planetary gear transmission mechanism (not shown).
And the cam plunger 2 fitted to the eccentric shaft 21
2, hydraulic pressure is transmitted to a tool head (not shown) via a plunger rod 23, and laying work such as crimping and cutting is performed by a crimping tool or a cutter attached to the tool head.

The ON / OFF operation of the motor for driving the planetary gear speed change mechanism is performed by the main switch button 3 as shown in the figure, and when releasing the hydraulic mechanism, the hydraulic pressure provided under the main switch button 3 is juxtaposed. Use the release button 4.
That is, when the hydraulic pressure release button 4 is pressed, the lever 5 having its end fixed to the hydraulic pressure release button 4 rotates about the shaft 11 of the case 1 as a fulcrum, and the upper end portion of the lever 5 acts as a lever. Thus, the hydraulic pressure applied to the tool head portion by pushing the valve stem 31 is released. Reference numeral 15 is a spring station which is attached via a spring 16 and exerts an urging force to restore it when the hydraulic pressure release button 4 is pressed.

[0005]

The above-described switch mechanism of the electric hydraulic tool is very convenient because the switch can be turned on and off with one hand, and it can be operated even in an inconvenient place at a high place and has a large degree of freedom. It is something. However, while the main switch button 3 is being pressed to apply hydraulic pressure to the tool head, the hydraulic pressure release button 4 is accidentally pressed, and conversely, the main switch button 3 is pressed while the hydraulic pressure release button 4 is being pressed to release the hydraulic pressure. There is a risk of malfunction due to the oil pressure being applied to the tool head by touching with. In particular, there is a possibility that such a malfunction may occur because it is operated by one hand.

The present invention has been made in view of the above problems, and an object thereof is to easily operate with one hand even when the main switch button 3 and the hydraulic pressure release button 4 are arranged side by side. Another object of the present invention is to provide a switch mechanism in an electric hydraulic tool that can reliably prevent erroneous operation.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a tool head, in which a switch mechanism of an electric hydraulic tool is driven by a motor to transmit a rotational force. The hydraulic pressure release mechanism is operated via the main switch button for driving the motor and the lever at the handle portion under the case of the electric tool housing the hydraulic pressure mechanism transmitting the hydraulic pressure and the hydraulic pressure release mechanism. And a hydraulic pressure release button to be placed side by side, and the main switch button and the hydraulic pressure release button are rotated in the vicinity of the main switch button with the movement of the main switch button so that the end thereof is located in front of the hydraulic pressure release button. And a stop lever that automatically returns by a spring and the hydraulic pressure release button is rotated to rotate with the movement of the hydraulic pressure release button and released when the hydraulic pressure release button is released. Spring stearyl returning more automatically - arranged and, further the hydraulic release button is partially the stop lever of Toki該 hydraulic release button is pressed the hydraulic release button -
It is characterized in that it is arranged so as to come to a position to prevent the rotation of.

[0008]

The operation when the switch mechanism of the electric hydraulic tool of the present invention is used as the above means will be described with reference to the reference numerals in the accompanying drawings. Main switch button 3 installed on the handle 2
When is pressed, the stop lever 6 also rotates about the shaft 13 as the main switch button 3 rotates. At this time, the end 6a of the stop lever 6 is provided with the projection 4 of the hydraulic pressure release button 4.
It comes to be located in front of a. That is, even if the oil pressure release button 4 is pushed by the rotation of the stop lever 6, the end portion 6a of the stop lever 6 becomes an obstacle and cannot be pushed, and the oil pressure release lever 5 cannot be rotated. Therefore, the valve stem 31 cannot be pushed by the hydraulic pressure release lever 5, and the hydraulic pressure release mechanism does not operate. (See Figure 3).

Next, when the hydraulic pressure release button 4 is pressed, the hydraulic pressure release lever 5 rotates about the shaft 11 while the lower projection 4b pushes the spring stay 8, and the valve stem 31 is levered.
Press to release the hydraulic pressure. At this time, the projection 4a formed on the upper side of the hydraulic pressure release button 4 moves to the upper side of the stop lever 6 and almost comes into contact therewith. Therefore, the stop lever 6 becomes unrotatable, but at the same time, the main switch button 3 in contact with the stop lever 6 also becomes immovable. That is,
Even if the main switch button 3 is pushed by the rotation of the hydraulic pressure release button 4 and the hydraulic pressure release lever 5 integrated with the hydraulic pressure release button 4, the projection 4a becomes an obstacle and cannot be pushed (FIG. 4). reference).

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a switch mechanism in the electric hydraulic tool of the present invention, and is a diagram including a part of a cam plunger mechanism 20 (hydraulic mechanism) as in FIG. Although not shown, a motor, a planetary gear speed change mechanism driven by the motor, and the like are arranged in the case 1, and a handle portion 2 is formed on the lower side of the case 1. A main switch button 3 for driving the engine and a hydraulic pressure release button 4 are arranged side by side.

The main switch button 3 (the same elements as those in FIG. 5 showing the conventional example use the same reference numerals for convenience of explanation) disposed on the handle portion 2 of the electric hydraulic tool has the handle portion 2. It is designed to be pushed by one hand of the worker on the side. That is, the main switch button 3 turns the motor on.
When the power is turned off, the cam plunger 22 of the cam plunger mechanism 20 is driven via the planetary gear speed change mechanism. Then, the cam plunger 22 reciprocally drives the plunger rod 23 to transmit the hydraulic pressure to the tool head. The main switch 3 rotates about a shaft 12 provided on the case 1.

A groove is provided in the main switch button 3, and an oil pressure release lever 5 having an oil pressure release button 4 fixed to the end thereof is fitted in the groove so as not to come into contact with the main switch button 3. . That is, the main switch button 3 and the hydraulic pressure release button 4 (hydraulic pressure release lever 5) rotate independently of each other within a certain range.
The hydraulic pressure release lever 5 is pivotally attached to a shaft 11 provided on the case 1 as a fulcrum.

Next, 6 is a stop lever, which is rotatably pivoted about a shaft 13 provided on the case 1. A spring 7 is attached to the stop lever 6 and is installed so as to substantially contact the main switch button 3. That is, when the main switch button 3 is pressed, the stop lever 6 which comes into contact with the main switch button 3 is also rotated, and when the main switch button 3 is released, the stop lever 6 and the main switch are automatically driven by the urging force of the spring 7. Button 3 is designed to return to its original position. Further, 8 is a spring station, which is arranged so as to be superposed on the lower side of the stop lever 6.

FIG. 2A is a view showing an installation state of the spring steer 8 provided below the stop lever 6.
FIG. 2B is a perspective view of the hydraulic pressure release button 4 and an end portion of the hydraulic pressure release lever 5 integrally fixed to the hydraulic pressure release button 4. The hydraulic pressure release button 4 is formed with two protrusions 4a and 4b, and one of the protrusions (protrusion seen in the lower part of the figure) 4b is substantially in contact with the spring stay 8. A spring 9 is attached to the spring station 8 and when the spring station 8 is pushed by the projection 4b of the hydraulic pressure release button 4, an urging force acts on the projection 4b so as to return it from the spring station 8 side. To do. Therefore, when the hydraulic pressure release button 4 is pushed and released, an urging force acts so that the spring stay 8 pushes back both the hydraulic pressure release button 4 and the hydraulic pressure release lever 5. Also, the hydraulic pressure release button 4
The projection 4a is provided so that when it is pushed, the projection 4a comes to a position that prevents the stop lever 6 from rotating, as will be described later. Incidentally, the hydraulic pressure release button 4 has such a protrusion 4
It may be manufactured in such a shape that a and 4b are formed.

The switch mechanism in this electric hydraulic tool is constructed as described above, and its operation will be described below. When the main switch button 3 is pressed, the motor and the planetary gear drive mechanism are driven to transmit the hydraulic pressure to the tool head through the plunger rod 23. As the main switch button 3 rotates, the stop lever 6 and the shaft 13 also rotate. Rotate around. At this time, the end 6a of the stop lever 6 comes to be positioned in front of the protrusion 4a of the hydraulic pressure release button 4. That is, even if the oil pressure release button 4 is pushed by the rotation of the stop lever 6, the end portion 6a of the stop lever 6 becomes an obstacle and cannot be pushed, and the oil pressure release lever-4 cannot be rotated. Therefore, the valve stem 31 cannot be pushed by the hydraulic pressure release lever-4, and the hydraulic pressure release mechanism does not operate. Therefore, when it is desired to press the main switch button 3, only the main switch button 3 operates and the hydraulic pressure release button 4 never operates (see FIG. 3).

Next, when the hydraulic pressure release button 4 is pressed, the hydraulic pressure release lever 5 rotates about the shaft 11 while the lower projection 4b pushes the spring stay 8, and the valve stem 31 is levered.
Press to release the hydraulic pressure. At this time, the projection 4a formed on the upper side of the hydraulic pressure release button 4 moves to the upper side of the stop lever 6 and almost comes into contact therewith. Therefore, the stop lever 6 cannot rotate, but at the same time, the main switch button 3 in contact with the stop lever 6 cannot rotate. That is,
Even if the main switch button 3 is pushed by the rotation of the hydraulic pressure release button 4 and the hydraulic pressure release lever 5 which is integrated with the hydraulic pressure release button 4, the projection 4a becomes an obstacle and cannot be pushed. Therefore, the hydraulic mechanism does not operate via the motor and the planetary gear shifting mechanism. Therefore, when it is desired to press the hydraulic pressure release button 4, only the hydraulic pressure release button 4 operates and the main switch button 3 never operates (see FIG. 4).
reference).

The details of the embodiment of the switch mechanism for the electric tool of the present invention are as described above. However, this switch mechanism is not limited to the electric hydraulic tool, and includes two drive mechanisms that are independently operated in the machine. Of course, it can also be used in other electric tools having a mechanism that operates with a switch mechanism.

[0018]

Since the switch mechanism of the electric hydraulic tool of the present invention is configured as described above in detail, malfunction may occur in the electric hydraulic tool having the main switch button and the hydraulic pressure release button arranged side by side on the handle portion. Can be prevented. That is, if you want to drive the motor, press the main switch button to turn on only the main switch.
If the user wants to press the hydraulic pressure release button, only the hydraulic pressure release mechanism can be operated, and there is no erroneous operation in which the other switch is turned on by mistake. Further, this switch mechanism has a very convenient feature that it is portable, can be operated with one hand, and can prevent malfunction.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a switch mechanism in an electric hydraulic tool according to the present invention.

FIG. 2 (A) is a view showing an installation state of a spring station provided on a lower side of a stop lever, and FIG. 2 (B) is integrally fixed to the hydraulic pressure release button and the hydraulic pressure release button. FIG. 7 is a perspective view of an end portion of the hydraulic pressure release lever that is operated.

FIG. 3 is a diagram showing an operation in the case where the movement of the hydraulic pressure release button is disabled when the main switch button is pressed.

FIG. 4 is a diagram showing an operation in a case where movement of a main switch button is disabled when a hydraulic pressure release button is pressed.

FIG. 5 is a configuration diagram of a switch mechanism in a conventional electric hydraulic tool.

[Explanation of symbols]

1 case 2 handle part 3 main switch button 4 oil pressure release button 4a, 4b protrusion formed on the oil pressure release button 5 oil pressure release lever 6 stop lever 7, 9 spring 8 spring stay

Claims (1)

[Claims] 1. A handle portion at a lower portion of a case of an electric tool which houses a hydraulic mechanism for transmitting hydraulic pressure to a tool head portion via a drive mechanism which is driven by a motor and transmits a rotational force and a hydraulic pressure releasing mechanism. , A main switch button for driving the motor and a hydraulic pressure release button for operating the hydraulic pressure release mechanism via a lever are arranged side by side, and the main switch button and the hydraulic pressure release button are provided in the vicinity of the main switch button. When the hydraulic release button is pushed, a stop lever that rotates with movement and has its end located in front of the hydraulic release button to prevent movement of the hydraulic release button and to automatically return by a spring and the hydraulic release button are pressed. A spring station is arranged which rotates with movement and automatically returns by a spring when the hydraulic pressure release button is released. Further, the hydraulic pressure release button pushes the hydraulic pressure release button. A switch mechanism for an electric hydraulic tool, characterized in that a part of the hydraulic pressure release button is arranged so as to come to a position to prevent rotation of the stop lever.