JPH0244908Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is an improvement of an electric riveter for caulking rivets at required points on various parts using oil pressure, and is used to manufacture and sell tools. It is used in the technical field in which it is used.

(Prior Art) A wide variety of electric riveters (or electric riveters) have been proposed and implemented in the past.
Publication No. 4674, Publication No. 60-23083, and Publication No. 4674
The type described in Publication No. 60-23084 is known, and all of these electric riveters transmit the rotation of the motor to the spindle, mandrel, etc. via a drive gear, and the rotation of these The retracting action is configured to perform the required riveting operation.

(Problems to be solved by the invention) However, the above-mentioned conventional electric riveter has a very complicated internal structure for rotating and retracting the spindle, mandrel, etc., and is made up of a combination of various parts. Therefore, there are various problems such as not only being prone to breakdowns but also high costs and high rotational noise of various members.

The present invention was researched and developed to solve the above problems, and is the main mechanism of the conventional air riveter that uses oil pressure (for example,
To provide an electric riveter which has a simplified and robust structure by using an electric riveter (refer to No. 23104), generates less noise, and can perform riveting work smoothly and reliably. With the goal.

(Means for Solving the Problems) In order to achieve the above object, the electric riveter according to the present invention retracts the piston of the jyo mechanism using oil pressure when energized to perform the required riveting, and when the riveter is not energized, An electric riveter configured such that the piston is returned to its original position by a returning spring when the piston is returned to its original position, and a sliding valve and a switch mechanism for supplying and discharging oil each having a returning spring and installed in the main body of the electric riveter. , a plunger for supplying oil to the piston side, a reciprocating member for the plunger, and an oil source. At least two oil supply/discharge channels are provided across the main oil flow path and penetrate the sliding valve at a predetermined interval, and at least two oil flow paths are required in at least two locations in the main oil flow path. It is composed of at least two fitting spheres which are press-contacted to each valve seat with a spacing of The oil supply flow path between the piston and the piston is opened and a switch is turned on to force oil into the piston side by the piston action of the plunger,
Further, the sliding valve is returned to its original position by a returning spring to open an oil discharge (return) passage between the piston side and the oil source, and is also configured to be switched off at a timely manner.

(Function) In the above configuration, the sliding valve is moved backward to open the oil supply path between the oil source and the piston side. Also, at that time, simultaneously press the switch for the reciprocating member of the plunger.
To turn on, the plunger starts piston action. Therefore, oil is successively forced into the piston side from the oil source through the oil supply passage, causing the piston to retreat, and the required riveting operation is performed by the retreating action.

Next, after riveting is completed, the sliding valve is returned to its original position by a returning spring to close the oil supply flow path and at the same time open the oil discharge (return) flow path between the piston side and the oil source. Therefore, when the piston is returned to its original position by the returning spring, the oil on the piston side is returned to the oil source side, and at the same time, the switch is turned off by setting an appropriate switch mechanism such as a limit switch, and the plunger is reciprocated. The operation of the member is stopped, the piston action of the plunger is stopped, and one-sile riveting is completed.

(Embodiment) Below, an embodiment of the present invention will be described based on the accompanying drawings. Reference numeral 1 denotes a manual electric riveter main body equipped with a handle 2, and the outside of the front surface of the main body 1 in the upper part of the handle 2. A trigger 3 is pivotally attached to the body 1, and a sliding valve 5 having a return spring 4 at the rear and a switch mechanism 6 are vertically provided in the main body 1 opposite to the trigger. is facing the back side of Trigger 3.

The sliding valve 5, which is tightly fitted into the sliding hole 7 of the main body 1 so as to be movable and retractable, has a main oil flow path 8 along the sliding direction inside, and a main oil flow path 8 that crosses the main oil flow path 8 at right angles. a total of four oil supply and discharge flow channels, two each extending through the sliding valve 5 at a predetermined interval;
That is, in this embodiment, from the front, the oil supply passage 9a, oil discharge (return) passage 9b, 9
c and an oil supply flow path 9d are provided therethrough, and an oil guide groove 10 is provided in a ring shape around the outer periphery of the sliding valve 5 at the position of each of the flow paths 9a to 9d. In addition, valve seats 11 and 12 are formed in the main oil flow path 8, located between the flow paths 9c and 9d and between 9d and the rear end of the valve. Steel spheres 15 and 16 are fitted and press-welded via springs 13 and 14 so as to be removable.

A plunger 17 is fitted into a plunger hole 18 in the main body 1, and its rear portion is connected to a reciprocating member 19 of the plunger. In this embodiment, the reciprocating member 19 is constructed by meshing a gear 22 provided on a rotating shaft 21 of a motor 20 with a gear 25 of a crankshaft 24 whose upper and lower sides are supported by bearings 23. The shaft 24 is inserted into the shaft hole 26 formed through the rear end of the plunger 17, and when the switch mechanism 6 is turned on, the motor 20 is activated to rotate the crankshaft 24, thereby reciprocating the plunger 17 back and forth. This is used to perform a pumping action to feed oil to the front side of the piston inside the oil cylinder, which will be described later.

Reference numeral 27 is a limit switch mechanism provided at the rear upper part of the main body 1, and when the piston is retracted to a predetermined position by oil pressure and the required riveting is completed, a projection 28 provided at the rear of the piston is activated. It is set and arranged so that the motor 20 is stopped when the operation button 29 is pressed. In the figure, 30 is a part of the oil tank that is the oil source, 31 is an oil introduction channel, and 32 is a part of the oil tank. Oil return flow path 33 is the sliding hole 7 of the sliding valve 5
an oil flow path 35 that communicates with the second oil chamber 34 formed in the front space of the plunger hole 18;
A first oil chamber 36 communicates with an oil introduction passage 31 formed at the rear of the sliding hole 7 of the sliding valve 5;
4 is an oil flow path communicating between the sliding hole 7 of the sliding valve and the inside of the oil cylinder 37; 38 is a nose piece; 39 is a jacket; 40 is a jacket shear;
Reference numeral 1 designates a piston, 42 a discharge hole provided in the journal and the piston for discharging the cutting shaft S of the rivet R, 43 a return spring of the piston, and 44 a pressing spring of the journal.

Next, the operation will be explained based on the above embodiment.
When the trigger 3 is pulled with a fingertip, the sliding valve 5 is pushed by the back of the trigger and retreats to the position shown in FIG. front side)
are each flow path 33, 9d, 8, 9a for oil supply
and 36 are opened and communicated. Also,
At this time, the trigger 3 simultaneously presses the protrusion of the switch mechanism 6, so the switch is engaged and the motor 2
0, the reciprocating member 19 consisting of the drive shaft 21, gears 22, 25, crankshaft 24, etc. is operated, and the plunger 17 is reciprocated within the plunger hole 18. The oil tank 30 is pumped by the piston action of the plunger 17.
The oil inside is passed through the oil introduction channel 31 and the first oil chamber 35, and the spheres 15 and 16 are connected to the spring 1.
3 and 14 and are separated from the valve seats 11 and 12 one after another into the main oil flow path 8, and then are press-fitted into the front side of the piston 41 in the oil cylinder 37 through the oil flow path 36. The piston 41 is moved from the position shown in FIG. 1 to the second position by its oil pressure.
The shaft S of the rivet R held by the jaw 39 is cut by the retreating action of the piston 41, and the required riveting is performed.
The cutting shaft S is discharged from the rear end of the machine through the discharge hole 42.

Also, in synchronization with the completion of the above riveting,
Since the protrusion 28 protruding from the outer periphery of the rear part of the piston 41 is configured to press the operating button 29 of the limit switch 27 to stop the motor 20,
When the motor 20 stops, the piston action of the plunger 17 stops, and the action of pressurizing oil into the oil cylinder 37 is stopped.At the same time, by relaxing the force applied to the trigger 3, the sliding valve 5 returns. The spring 4 returns it to its original position. When the sliding valve 5 returns, the oil supply path is cut off, and the oil discharge (return) flow paths 36, 9b, 8, 9c, and 32 in the oil cylinder 37 and the oil tank 30 are opened. will be communicated. Therefore, the piston 41
The oil returns to the oil source side by the returning spring 43 and smoothly returns to the original position shown in FIG. 1, thus completing one cycle of riveting work.

It should be noted that the present invention is not limited to the above embodiment, and other cam-type mechanisms may be adopted for the reciprocating member 19 of the plunger 17, for example.

(Effects of the invention) As detailed above, the electric riveter according to the invention does not require a complicated internal structure such as a clutch mechanism for rotating and retracting the piston, mandrel, etc. unlike conventional products. Not only can it be easily and inexpensively provided, but it also has many advantages such as being robust, having fewer failures, and producing less noise, and can smoothly and reliably accomplish the desired riveting work.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view of the main parts in a normal state, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a view when the trigger is activated. FIG. 4 is a sectional view taken along line BB in FIG. 3. FIG. 1... Electric riveter main body, 4... Returning spring, 5... Sliding valve, 6... Switch mechanism, 8... Main oil flow path, 9a, 9d...
Oil supply channel, 9b, 9c... Oil discharge (return) channel, 11, 12... Valve seat, 13, 1
4... Spring, 15, 16... Sphere, 17...
... Plunger, 19 ... Reciprocating member of plunger, 30 ... Oil source, 41 ... Piston,
43...Returning spring.

Claims (1)

[Scope of utility model registration request] An electric riveter that is configured to perform the required riveting by retracting a piston of a jyo mechanism using oil pressure when energized, and to return the piston to its original position by a returning spring when not energized. A sliding valve and a switch mechanism for supplying and discharging oil each having a returning spring installed in the main body, a plunger for supplying oil to the piston side, and a reciprocating member of the plunger;
The sliding valve has a main oil flow path along the sliding direction inside, and a main oil flow path that is penetrated through the sliding valve at a predetermined distance across the main oil flow path. At least two oil supply/discharge passages, and each valve seat formed at a required distance at at least two locations in the main oil passage, is press-contacted via a spring so as to be able to come into contact with and separate from it. The sliding valve is retracted to open the oil supply passage between the oil source and the piston side, and a switch is turned on to supply oil by the piston action of the plunger. The sliding valve is configured to be press-fitted into the piston side, and the sliding valve is returned to its original position by a returning spring to open the oil discharge (return) flow path between the piston side and the oil source, and to An electric riveter characterized by being configured to turn off a switch.