JPS632306Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a retaining ring mounting machine for inner diameter.

For example, when positioning a bearing inserted into a hole, a retaining ring for the inner diameter is generally used, and the retaining ring for the inner diameter is generally a C-shaped retaining ring or a C-shaped concentric retaining ring. However, the C-shaped retaining ring is relatively expensive, and the C-shaped concentric retaining ring has a problem in that it is not provided with an engaging portion that can engage with a tool. Therefore, the inventor developed a retaining ring R for the inner diameter, as shown in FIG. 1, which can be engaged with a tool and can be manufactured at low cost. This inner diameter retaining ring R is made by curving a steel plate of a constant width into a C shape, forming engagement parts 2, 2 for tool engagement on the inner periphery near the opening 1, and further forming an engagement part 2, 2 on the end surface of the opening 1. 3 is a plane.
This inner diameter retaining ring R is easy to handle because a tool can be engaged with the engaging portion 2, and is extremely inexpensive because it can be manufactured from a steel plate having a constant width. Taking advantage of the development of this internal retaining ring, the present invention has developed an internal retaining ring mounting machine that can attach this new internal retaining ring or the conventional internal retaining ring to a predetermined member.

Conventionally, the attachment of the inner diameter retaining ring has been done manually, requiring a great deal of labor. Additionally, a hydraulic type has been proposed, as described in JP-A No. 56-134183, but it is extremely unstable because it holds the retaining ring at two points, and there is a risk that the retaining ring will pop off from the tool. It was hot too.

That is, the object of this invention is to provide an inner retaining ring mounting machine that can ensure work efficiency and worker safety.

The retaining ring for inner diameter according to this invention includes a pair of claws that can be opened and closed in an arc shape by engaging with the engaging portion of the retaining ring for inner diameter, and the inner diameter in a state where the diameter is reduced by the operation of the claws. The retaining ring is equipped with an inner circumferential guide that comes into contact with the inner circumferential surface of the retaining ring to hold the retaining ring. This prevents the inner diameter retaining ring from falling off due to friction with the circumferential guide, and can be used as a hand tool or a powered machine.

Next, a first embodiment of the internal retaining ring mounting machine according to this invention will be described based on the drawings.

2 to 5, the internal retaining ring mounting machine has an inner circumferential guide 4 with a substantially C-shaped cross section at the upper end, and a horizontal support plate 5 is disposed on the inner surface of the inner circumferential guide 4. It has been passed. A pair of claws 6 are fitted into the support plate 5 from the sides, and each claw 6 is fitted with a bolt 7.
It is pivotally connected to the support plate 5 by means of the support plate 5 so as to be freely rotatable in the horizontal direction. Each pawl 6 is provided with a downward protruding cam piece 8 which is joined to each other to form a trapezoid whose width gradually decreases downward. A cam block 10 is disposed below the claw 6 and is in contact with both trapezoidal inclined surfaces 9 formed by the cam pieces 8. This cam block 10 is connected to a piston rod 12 of a fluid pressure cylinder 11 provided further below. connected. When the cam block 10 is raised, it guides the cam piece 8 so as to close the pawl 6. A pin 1 is provided on the upper end surface of the pawl 6, which can engage with the engaging portion of the retaining ring R for the inner diameter.
3 protrudes and operates in an arc shape around the bolt 7, and on the outer periphery of the upper end of the inner guide 4 are pins 13 and 1 of the claw 6 in the closed state.
A perfectly circular arcuate surface 14 is formed in which the inner circumferential surface of the inner retaining ring R engaged with the inner diameter retaining ring R is brought into close contact with the inner circumferential surface of the retaining ring R. A sleeve 15 that passes through the support plate 5 vertically is inserted and fixed, and a detector 16 is supported by the sleeve 15 so as to be slidable in the vertical direction. Detector 16
is a coil spring 17 housed within the sleeve 15.
It is urged upward and downward by a nut 18 and is prevented from coming off by a nut 18 screwed into the lower end.
The upper end surface of the detector 16 is held at a higher position than the upper end surface of the inner guide 4, and a micro switch 19 is arranged below the detector 16. The detector 16 is pushed downward by the inner retaining ring R to operate the micro switch 19 when the inner retaining ring R is delivered to the inner retaining ring mounting machine. The inner guide 4 secures the roundness of the inner retaining ring R when holding the inner retaining ring R, and at the same time makes frictional contact with the inner peripheral surface of the inner retaining ring R to prevent the inner retaining ring R from falling off. prevent. Therefore, the inner guide 4 allows the inner retaining ring R to be smoothly attached, and also prevents the inner retaining ring R from flying off, thereby ensuring the safety of the operator.

When transferring the inner retaining ring R to the inner retaining ring mounting machine, while positioning the engaging portion 2 of the inner retaining ring R relative to the pin 13, place the inner retaining ring R around the inner guide 4. Introduce. When the inner diameter retaining ring R is delivered, the inner diameter retaining ring R is in a reduced diameter state,
Alternatively, the delivery can be carried out in any state without diameter reduction, and when handing over manually, it is easier to perform the delivery in the state without diameter reduction, that is, in the open state.

Note that it is also possible to use other inner diameter retaining ring detection means in place of the micro switch 19, for example, a means for detecting a retaining ring for the inner diameter.
A through hole that opens toward the inner surface of the sleeve 15 is bored, and an air introduction hole that communicates with this through hole when the detector is lowered is formed in the sleeve 15, and an air pressure source is connected to this air introduction hole. At the same time, the pressure of the air pressure source may be detected, and the pressure drop of the air pressure source due to communication between the through hole and the air introduction hole may be detected.

Next, a second embodiment in which this invention is applied to a hand tool will be described based on the drawings.

In FIG. 6, the internal retaining ring mounting machine 21 has a pair of handles 22, and the rear portion of the handles 22 is a grip portion 23 that can be gripped with one hand.
The handles 22 are pivotally connected to each other by pins 24 at positions slightly rearward of their front ends, and when the grips 23 are squeezed by hand so as to approach each other, this clamping force is doubled and the handles 22 act to open the front ends of the A rear end of a link 25 extending in the front-rear direction is pivotally attached to the front end of each handle 22, and a rear end of an arm 26 disposed below the link 25 and projecting downward is pivotally attached. ing. Link 25 and arm 26 are pivotally connected to the front end of handle 22 by a single pin 27. At the front end of the link 25, the upper surface of the front end of a claw 28 that projects downward is pivotally attached by a pin 29, and the claw 28 is provided with a pair of upper and lower hinge plates 30 that project backward. On the other hand, the arm 26 is provided with a hinge block 31 that protrudes forward and enters between the hinge plates 30, 30.
is pivotally connected by a pin 32. A connecting link 33 extending in the horizontal direction is arranged between the upper hinge plate 30 and the link 25 and below the lower hinge plate 30. Connecting link 33
and link 25 are connected. The arm 2
2. The claw 28 and the link 25 are provided as a pair on the left and right, and the connecting link 33 connects the pivot point between the arm 26 and the claw 28 on the left side and the pivot point between the arm 26 and the claw 28 on the right side. are doing.

A pin 34 that can be engaged with the engaging portion 2 (see FIG. 1) of the retaining ring R for inner diameter is protruded from the front end of the lower surface of the claw 28, while a rear end of the lower surface of the arm 26 is provided for the inner diameter retaining ring R. An inner circumferential guide 35 that is in contact with the inner circumferential surface of the retaining ring R is provided in a protruding manner.

When using the inner retaining ring mounting machine 21, the engaging portion 2 is engaged with the pin 34 while aligning the inner peripheral surface of the inner retaining ring R with the inner guide 35. If the grip parts 23, 23 are squeezed here, the links 25, 25
The rear ends of the are spread apart. link 2 here
5 and 25 are connected to each other by a connecting link 33 at the center in the longitudinal direction, so that the link 2
When the rear ends of 5 and 25 are widened, their front ends narrow and the pins 34 and 34 approach each other in an arc shape,
The diameter of the inner retaining ring R is reduced. Inner guide 35
expands as the front end of the handle 22 widens, and when the retaining ring R for the inner diameter is contracted to the maximum diameter, the inner circumference of the retaining ring R contacts the inner peripheral surface of the retaining ring R for the inner diameter. Ensure the roundness of the surface. This allows the inner diameter retaining ring R to be smoothly inserted into the predetermined hole. Furthermore, since the arm 26 and the claw 28 protrude downward, the inner retaining ring R can be inserted deep into the hole. Furthermore, since the inner circumferential guide frictionally contacts the inner circumferential surface of the inner circumferential retaining ring R,
This also prevents the material from falling off, ensuring worker safety.

As mentioned above, the inner diameter retaining ring mounting machine according to this invention has a pair of claws that can open and close in an arc shape, so the engagement part with the retaining ring operates in an arc shape, and the inner circumference guide allows the inner diameter retainer to be installed. Since the diameter of the ring is reduced while maintaining its roundness, deformation of the retaining ring can be prevented, and friction with the inner circumference guide prevents the inner diameter retaining ring from falling off, so the retaining ring is stable when set. In addition to being able to hold the retaining ring securely. Therefore, it has an excellent effect of ensuring work efficiency and worker safety.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the newly developed retaining ring, Fig. 2 is a perspective view showing the outline of the basic configuration of the first embodiment of this invention, and Fig. 3 is along the - arrow line in Fig. 2. The sectional view, Figure 4 is the plan view of Figure 3, and Figure 5 is the top view of Figure 3.
The figure is a sectional view taken along the - arrow line in FIG. 3, and FIG. 6 is an exploded perspective view showing a second embodiment in which this invention is applied to a hand tool. DESCRIPTION OF SYMBOLS 1... Opening part, 2... Engaging part, 3... End surface, 4
...Inner guide, 5...Support plate, 6...
Pawl, 7... Bolt, 8... Cam piece, 9... Inclined surface, 10... Cam block, 11... Fluid pressure cylinder, 12... Piston rod, 13... Pin,
14... Arc-shaped surface, 15... Sleeve, 16...
Detector, 17...Coil spring, 18...Nut,
19...Micro switch, 20...Inner diameter retaining ring detection switch, 21...Inner diameter retaining ring mounting machine,
22...Handle, 23...Grip portion, 24...Pin, 25...Link, 26...Arm, 27...
Pin, 28...Claw, 29...Pin, 30, 31...
...Hinge block, 32...Pin, 33...Connection link, 34...Pin, 35...Inner guide, R
...Retaining ring for inner diameter.

Claims (1)

[Scope of utility model registration request] A pair of claws that can be opened and closed in an arc shape by engaging with the engaging portion of the inner retaining ring; An inner circumferential retaining ring mounting machine comprising an inner circumferential guide for holding the retaining ring.