JPH0123706Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a ball press-fitting device for automatically supplying balls for closing oil holes of a cylinder block and press-fitting them into press-fit locations.

BACKGROUND TECHNOLOGY A ball press-fitting device that automatically supplies balls and press-fits them into a press-fitting location usually has a press-fitting ram for press-fitting the balls into the press-fitting location, and a ball press-fitting device for feeding balls one by one in front of the press-fitting ram. It consists of a supply mechanism and a positioning mechanism for accurately positioning the balls supplied to the front of the press-fitting ram at the front end of the press-fitting ram. When a ball is press-fitted into a press-fitting part using this press-fitting device, the tip of the press-fitting ram is placed in a position facing the press-fitting part, and then the ball is supplied in front of the press-fitting ram by the supply mechanism, and the ball is After the ball is positioned by the positioning mechanism, the press-fitting ram is slid forward by the hydraulic cylinder, thereby press-fitting the ball into the press-fitting location.

Problems to be Solved by the Invention When a ball is press-fitted into a press-fitting location using the above-mentioned press-fitting device, the press-fitting ram and positioning mechanism of the press-fitting device are moved by a separate drive device. This required two units, and at the same time required a device to adjust the timing of both, resulting in a problem that the overall structure became complicated.

Means for Solving the Problem The ball press-fitting device is slidably supported by the device main body arranged in a horizontal state, and has a ball press-fitting ram having a cam surface at its base, and a ball press-fitting ram in front of the device main body. A support frame is fixed to the support frame and has a guide hole through which the press-fitting ram passes, a rubber bushing for preventing ball rolling is mounted on the inner circumferential surface of the guide hole of the support frame, and a rubber bushing is mounted on the guide hole. It has a pressure-feeding pipe for force-feeding the balls by pressure, a cam surface that is rotatably supported by a support frame via a pin, and that comes into contact with the cam surface of the press-fitting ram located at the rearward end. and a stopper member having a claw portion protruding into the guide hole at its tip, and when the press-fitting ram cam surface comes into contact with the stopper member cam surface, the claw portion at the tip of the stopper member engages with the above-mentioned guide hole. The stopper member protrudes into the guide hole, and as the press-fitting ram cam surface separates from the stopper member cam surface as the press-fitting ram moves forward, the stopper member rotates under its own weight, and the claw retracts to the outside of the guide hole. This is how it was done.

Operation When the ball supplied to the front of the press-fitting ram is positioned by the claw part of the stopper member, and the cam surface of the press-fitting ram separates from the cam surface of the stopper member due to the forward movement of the press-fitting ram, the ball is positioned in front of the press-fitting ram. , rotating the stopper member by its own weight,
The claw portion of the stopper member is retracted to the outside of the guide hole, and the ball is stably held within the guide hole by a rubber bushing mounted within the guide hole.

Embodiment FIGS. 1 and 2 are drawings showing a ball press-fitting device according to the present invention, in which 1 is a main body of the device arranged in a horizontal state, and 2 is a rod supported slidably by the main body 1 of the device. The rod 2 slides in the left and right directions in the figure by a hydraulic cylinder (not shown) integrated into the main body 1 of the apparatus. 3 is a press-fitting ram fixed to the tip of rod 2,
Reference numeral 4 denotes a cam surface integrally formed at the root portion of the press-fitting ram 3, and the cam surface 4 consists of a straight portion 4a and a tapered portion 4b continuous with the straight portion 4a. Reference numeral 5 denotes a support frame fixed to the front of the device main body 1, and a guide hole 6 through which the press-fitting ram 3 passes is provided in the front part of the support frame 5.
Further, a rubber bushing 7 for preventing the ball A from falling off is attached to the inner peripheral surface of the guide hole 6. Reference numeral 8 denotes a pressure pipe for feeding the ball A by air pressure into the guide hole 6 in which the rubber bush 7 is attached. It communicates with the guide hole 6 through the guide hole 6. A stopper member 9 is rotatably attached to a notch 10 formed in the lower part of the support frame 5 via a pin 11. A press-fitting ram 3 is attached to a portion of the stopper member 9 rearward from the pin 11. When the press-fitting ram 3 is located at the rearward end, the cam surface 1 that comes into contact with the cam surface 4 provided on the press-fitting ram 3
2 is provided. This cam surface 12 is as shown in the figure.
It consists of a straight part 12a that comes into contact with the straight part 4a of the cam surface 4 of the press-fitting ram 3, and a tapered part 12b that comes into contact with the tapered part 4b. When the straight portion 4a of the cam surface 4 of the press-fitting ram 3 is in contact with the straight portion 12a of the cam surface 12 of the stopper member 9, the claw portion 9a provided at the tip of the stopper member 9 protrudes into the guide hole 6. It is designed to do so. Reference numeral 13 denotes a stopper bolt screwed onto the rear end of the stopper member 9, and this stopper bolt 13 is used when the press-fitting ram 3 moves forward and the cam surface 4 of the press-fitting ram 3 separates from the cam surface 12 of the stopper member 9. Thus, when the stopper member 9 rotates clockwise in the figure, it comes into contact with the contact surface 5b provided on the support frame 5, thereby regulating the rotation angle of the stopper member 9 in the clockwise direction in the figure. It is.
14 is an air passage for detecting the presence or absence of a ball that passes through the axis of the press-fitting ram 3; 15 is an air passage that communicates with the air passage 14 bored in the rod 2; and 16 is an air passage for supplying air to the air passages 14 and 15. Therefore, when the press-fitting ram 3 is located at the forward end and the ball A is not supplied to the tip of the press-fitting ram 3, the air passage is opened from the air supply hole 16. The air supplied to the insides of the press-fitting ram 3 is blown outward from the tip of the press-fitting ram 3.
When ball A is supplied to the tip of air passage 14
is blocked, so air jetting stops. At this time, the presence or absence of the ball A is detected by detecting pressure changes occurring within the air passages 15 and 14.

In the above configuration, when the ball A is press-fitted into the press-fitting position using the ball press-fitting device according to the present invention,
First, the tip opening of the guide hole 6 provided in the support frame 5 is positioned at the press-fitting location. Next, press-fitting ram 3
The press-fitting ram 3 is positioned at the backward end using a hydraulic cylinder (not shown) for sliding the
The straight part 4a of the cam surface 4 of the press-fitting ram 3 is connected to the straight part 12 of the cam surface 12 of the stopper member 9.
By abutting the stopper member 9, the claw portion 9a of the stopper member 9 is caused to protrude into the guide hole 6. Next, in this state, as shown in FIG. 1, the ball A is force-fed between the tip end surface of the press-fitting ram 3 in the guide hole 6 and the claw part 9a, and the rubber bush 7 is inserted to prevent the ball A from rolling due to its own weight. After positioning the ball A by the claw portion 9a of the stopper member 9, the press-fitting ram 3 is moved forward to the right in the figure. Then, the tip of the press-fitting ram 3 comes into contact with the ball A, and the press-fitting ram 3
Since the tapered portion 4b of the cam surface 4 contacts the tapered portion 12b of the cam surface 12 of the stopper member 9, the stopper member 9 rotates clockwise in the figure under its own weight. When the press-fitting ram 3 moves further forward, the cam surface 4 of the press-fitting ram 3 moves to the stopper member 9.
The stopper member 9 moves away from the cam surface 12 of the
The stopper bolt 13 rotates clockwise in the figure until it comes into contact with the contact surface 5b, and the claw portion 9a of the stopper member 9 retreats to the outside of the guide hole 6. After that, as shown in FIG. 2, the ball A is pushed out of the guide hole 6 by the forward motion of the press-fitting ram 3, and the ball A is press-fitted into a press-fitting position located in front of the guide hole 6. When the press-fitting of the ball A into the press-fitting location is completed in this way, the press-fitting ram 3 is moved back to the retreating end again, and the cam surface 4 of the press-fitting ram 3 is brought into contact with the cam surface 12 of the stopper member 9. After the claw portion 9a of the stopper member 9 is projected into the guide hole 6, the above operation may be repeated.

Effects of the Invention As described above, the ball press-fitting device according to the present invention positions the balls supplied in front of the press-fitting ram by the claw portion of the stopper member, and press-fits the balls by the forward movement of the press-fitting ram. When the cam surface of the stopper ram separates from the cam surface of the stopper member, the stopper member is rotated by its own weight, and the pawl of the stopper member is retracted outside the guide hole, which improves ball positioning. There is no need to provide a dedicated drive device for moving the stopper member, and at the same time, there is no need for a special device for synchronizing the operation timing of the press-fitting ram and the stopper member, and the structure of the entire device can be simplified. In addition, the ball press-fitting device of the present invention is equipped with a rubber bushing in the guide hole to prevent the ball from rolling under its own weight. At the same time, it is possible to position the ball in a stable state, and at the same time, when the ball is transferred toward the guide hole opening by the press-fitting ram after the stopper member claw part has retreated from the guide hole, the ball will not be accidentally placed in the guide hole. Since movement can be prevented, it is possible to reliably press-fit the ball.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a state in which the press-fitting ram of the ball press-fitting device according to the present invention is located at the retreating end;
The figure is a sectional view showing a state in which the press-fitting ram is located at the forward end. DESCRIPTION OF SYMBOLS 1... Device body, 2... Rod, 3... Ram for press-fitting, 4... Cam surface, 5... Support frame, 6...
... Guide hole, 7 ... Rubber button, 8 ... Pressure pipe, 9 ... Stopper member, 11 ... Pin, 1
2...Cam surface.

Claims (1)

[Scope of utility model registration request] A press-fitting ram for press-fitting a ball that is slidably supported by the device body arranged in a horizontal state and has a cam surface at its base, and a guide hole through which the press-fitting ram passes through is fixed to the front of the device body. a support frame having a support frame, a rubber bushing for preventing ball rolling attached to the inner peripheral surface of the guide hole of the support frame, and a rubber bushing attached to the guide hole,
A pressure-feeding pipe for force-feeding balls using air pressure, a cam surface rotatably supported by a support frame via a pin, and a cam surface in contact with the cam surface of the press-fitting ram located at the rear end. and a stopper member having a claw protruding into the guide hole at its tip, and when the press-fitting ram cam surface comes into contact with the stopper member cam surface, the claw at the tip of the stopper member moves into the guide hole. As the press-fitting ram cam surface separates from the stopper member cam surface as the press-fitting ram moves forward, the stopper member rotates under its own weight, and the claw part retreats to the outside of the guide hole. A ball press-fitting device characterized by: