JPH047850Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an apparatus for pressing and press-fitting a second part into a first part.

(Prior Art) In the case of assembling various mechanical parts, for example, when fitting a boss member (second part) to a flange member (first part) and assembling both parts integrally, conventionally, fixed press-fitting was used. The flange member is held in a jig, the boss member is attached to the end of the piston rod of the press-fit cylinder, and the boss member is press-fitted to the flange member to assemble. In such assembly work, since the second part is manually placed by the worker in advance on the first part, it is necessary to prevent the worker's hand from being pressed by the vertical movement of the piston rod of the press-fit cylinder. It is known that the press-fit head and press-fit cylinder are separated and the press-fit head is moved forward and backward by a dedicated low-pressure cylinder (1980-1998).
(See Publication No. 61128).

(Problem to be solved by the invention) However, according to this prior art, if the press-fit head moves forward, the press-fit cylinder is operated after that, so if the hand gets caught after the press-fit head operates, The press-fit cylinder will operate, resulting in a lack of safety.

Moreover, even though the pressure is low, the press-fit head is moved forward aggressively by the cylinder, which creates a sense of mental anxiety.

The present invention has been made in view of this point, and an object of the present invention is to provide a press-fitting device that improves safety without causing mental anxiety during operation.

(Means for Solving the Problems) In order to achieve the above object, the solution means of the present invention includes a press-fit cylinder and a press-fit head member movable by the press-fit cylinder, which are engaged during press-fitting and are press-fitted. The present invention is based on an apparatus in which a head member presses a second part and press-fits it into a predetermined position of the first part. The press-fitting head member is supported via a connecting means so as to be movable up and down relative to the second part, and a balance is provided to lower the press-fitting head member by its own weight to at least a predetermined position above the second part when the press-fitting head member is lowered. a cylinder, a detection means provided at the lower end of the press-fit head member for detecting an abnormal inclusion between the press-fit head member and the second part during the lowering process of the press-fit head member, and when the detection means detects an abnormality; The present invention is characterized by comprising a control means for prohibiting operation of the press-fit cylinder.

(Function) During press-fitting, the press-fitting head member due to its own weight,
It is lowered to a predetermined position via a balance cylinder. At this time, if an abnormal inclusion exists between the press-fit head member and the second part, the operation of the press-fit cylinder is prohibited based on the output of the detection means. on the other hand,
If there are no abnormal inclusions, the press-fitting cylinder operates to press-fit the second part into the first part.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

The press-fitting device 1 is equipped with a press-fit cylinder 2, a press-fit head member 3, a balance cylinder 4, a detection means 5, and a control means 6 as main parts. 1
It is press-fitted into the flange member which is part A.

The press-fitting cylinder 2 includes an engaging member 7 and a hydraulic circuit 8, and is arranged at the center of the press-fitting device 1. The press-fit cylinder 2 includes a main body 2a and a piston 2b.
and a rod 2c, and a piston 2b and an engaging member 7 are fixed to the upper and lower ends of the rod 2c, respectively. The engaging member 7 has a substantially rectangular parallelepiped shape,
The upper surface of the tip is tapered and the lower part is cut out to form a protrusion 7a. Hydraulic circuit 8
is equipped with a directional switching valve 8a, and a pipe from a hydraulic power source 8b is connected to the upper chamber 2d of the main body 2a via the directional switching valve 8a.
and is connected to the lower chamber 2e.

The press-fitting head member 3 presses the second part B, and is suspended on the right side of the press-fitting cylinder 2. This press-fitting head member 3 has a substantially cylindrical shape, and one end of a wire 11a of a connecting means 11, which will be described later, is fixed to the upper end, and a head 3c for pressing the second part B is screwed to the lower end, and the detecting means 5 air discharge ports 5b are formed. This press-fit head member 3
An engaging portion 3a that engages with the protrusion 7a of the engaging member 7 is fixedly provided on a side portion of the engaging member 7. This engaging part 3
Guide pieces 3d are disposed vertically at a predetermined interval on the side a, while a guide plate 3e is fixedly disposed on the opposite side to guide the vertical movement of the press-fit head member 3. Further, a groove 3b is cut approximately in the center of the press-fit head member 3, and the tip of the guide pin 3f is engaged with the groove 3b. The press-fit head member 3 is attached to the guide pin 3f when descending and ascending.
It is regulated and can be rotated approximately 90 degrees. Note that a concave press-fitting jig 9 is arranged almost directly below the press-fitting head member 3, and the second part B is press-fitted into the press-fitting jig 9 while the first part A is held. ing.

Further, a proximity switch 10 consisting of a limit switch is installed between the press-fitting head member 3 and the press-fitting jig 9.
is provided, and this proximity switch 10 causes the press-fit head member 3 to move against the control means 6 by contacting with a protrusion 3g provided at the lower end of the press-fit head member 3.
It is now possible to confirm the decline of

The balance cylinder 4 moves the press-fit head member 3 up and down, and is disposed on the left side of the press-fit cylinder 2. The connecting means 11 includes two pulleys 11b and 11 that are pivotally supported above the press-fit cylinder 2.
b, and a wire 11a stretched between the pulleys 11b, 11b, and the other end of the wire 11a is fixed to the piston 4a of the balance cylinder 4, which is an air cylinder. The pneumatic circuit 12 includes a directional switching valve 12a, and a pipe from an air source 12b is connected to the balance cylinder 4 via the directional switching valve 12a.
It is connected to an upper chamber 4b and a lower chamber 4c.

The detection means 5 attached to the lower end of the press-fitting head member 3 is for detecting abnormal inclusions, and has a cylindrical attachment 5a fitted so as to be movable up and down. Narrow groove 5
engraved with c. The head 3 is inserted into the narrow groove 5c.
A protruding pin 5d is inserted into the outer peripheral surface of c.

The discharge port 5b is connected to a back pressure sensor 5e. Air supplied from an air source (not shown) at a constant pressure through the air passage 5f is constantly discharged from the discharge port 5b, and the air is constantly discharged from the attachment 5a.
When the air pressure fluctuates due to an increase in the pressure, the back pressure sensor 5e detects the pressure fluctuation and sends a detection signal to the control means 6. This control means 6 controls the directional control valve 8 based on the signal from the back pressure sensor 5e.
The control signal is sent to a to prohibit the operation of the press-fit cylinder 2.

Next, the operation in this embodiment will be explained.

The flagin member, which is the first part A, is held in a press-fitting jig 9 in advance. This flange member has a second
The boss member, which is part B, is placed and fitted.

When a starting switch (not shown) is turned on, the balance cylinder 4 is freed by the directional control valve 12a, and the press-fitting head member 3, which has been stopped above, is lowered by its own weight. At this time, the press-fitting head member 3 is rotated approximately 90 degrees and descends under the control of the pin 3f, and the engagement portion 3a is prevented from contacting the protrusion 7a of the engagement member 7, and the engagement portion 3a When the press-fit head member 3 is located below the protrusion 7a, the press-fit head member 3 is rotated approximately 90 degrees in the opposite direction and returned to its original position.

If there is an object such as a worker's hand between the head 3c and the boss member, the attachment 5a will rise due to contact with the object and throttle the amount of air discharged from the air passage 5f. As a result, the back pressure switch 5e detects the fluctuation in air pressure, and in response, a stop signal is sent from the control means 6 to the directional control valve 8a, and the operation of the press-fit cylinder 2 is prohibited.
It can improve safety during work.

On the other hand, if there is no inclusion, the protrusion 3g comes into contact with the proximity switch 10 as the press-fit head member 3 descends, and in response to this output, the control means 6 outputs an operating signal. Thereby, the directional valve 8
a is switched, oil is supplied to the upper chamber 2d of the press-fit cylinder 2, the rod 2c descends, the lower end of the protrusion 7a presses the engagement part 3a of the press-fit head member 3, and the
The boss member is press-fitted into the flange member by the head 3c pressing the boss member as shown by the dotted chain line.

Therefore, after placing the second part B on the first part A, the press-fitting head member 3 falls under its own weight to the upper part near the second part B, which makes the work mentally less stressful compared to when operating with a cylinder. It can reduce anxiety.

After the boss member is press-fitted, the directional control valve 8a is switched and oil is supplied to the lower chamber 2e of the press-fit cylinder 2.
The rod 2c rises and returns to its home position.

(Effects of the invention) With the present invention, during press-fitting, the press-fitting head member is lowered to a predetermined position by its own weight via the balance cylinder, so there is no mental anxiety, and at this time, the press-fitting head member and the second part are If there is an abnormal object such as a hand between the two, the operation of the press-fit cylinder is prohibited, so safety can be improved.

[Brief explanation of the drawing]

The drawing is a front view showing the entire press-fitting device showing an embodiment of the present invention. 1...Press-fitting device, 2...Press-fitting cylinder, 3...
Press-fit head member, 4... Balance cylinder, 5...
...Detection means, 6...Control means, 11...Connection means, A...First part (flange member), B...Second part (boss member).

Claims (1)

[Scope of utility model registration request] The device includes a press-fitting cylinder and a press-fitting head member movable by the press-fitting cylinder, and these are engaged during press-fitting so that the press-fitting head member presses the second part and press-fits it into a predetermined position of the first part. a balance cylinder that supports a press-fit head member so as to be movable up and down with respect to a second part via a connecting means, and lowers the press-fit head member by its own weight to at least a predetermined position above the second part when the press-fit head member is lowered; a detection means provided at the lower end of the press-fit head member for detecting an abnormal inclusion between the press-fit head member and the second part during the lowering process of the press-fit head member; A press-fitting device characterized by comprising a control means for prohibiting operation.