JPH03161231A - Bell holder fitting construction for lens centering machine - Google Patents

Abstract

PURPOSE:To facilitate fitting of a bell holder and to shorten a time for arrangements of a lens centering machine by fitting a work shaft into a bell holder, and connecting them with a connecting member having a drilled through hole after positioning them through abutting of both in the axial direction. CONSTITUTION:The leg part 1b of a bell holder 1 is fitted to the projecting part 2a of a work shaft 2, and pressed till the extreme end face of the leg part 1b abuts against the abutting part 2b of the work shaft 2 for positioning. A bolt 3 as a connecting member is screwed in the internal thread part 5a and tightened to fit the bell holder to the work shaft 2. Consequently, as the bell holder 1 itself is unnecessary to be rotated at fitting, wear of the extreme end face of the leg part 1b and the abutting part 2b of the work shaft 2 as abutting parts in the axial direction can to be generated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bell holder mounting structure for a bell clamp in a lens centering machine.

(Prior Art) Bell holder mounting structures for bell clamps in conventional lens centering machines include the following.

As shown in FIG. 4, the bell holder 31 has an edge 31a at the periphery of its opening, a screw hole 31c formed in the bottom wall, and a cylindrical leg portion on the outer peripheral side of the screw hole 31c. 31.b is provided protrudingly.

On the other hand, a protrusion 3 is provided at the tip of the work shaft 32 on the bell holder side.
2a is provided protrudingly, and the protruding portion 32a has a male threaded portion 3.
2b is formed.

In order to attach the bell holder 31 to the workpiece @32, the screw hole 31c is screwed into the male threaded part 32b of the workpiece shaft 32, the leg part 3lb is fitted into the protrusion part 32a of the workpiece shaft 32, and the tip thereof The bell holder 31 itself is rotated until it comes into contact with the abutting portion 32c of the work shaft 32, and is screwed in and fixed.

(Problems to be Solved by the Invention) H: In the conventional technology, the distal end surface of the leg of the bell holder and the abutment part of the work shaft are worn out due to the rotation and sliding of the bell holder when attaching the bell holder to the workpiece sleeve. , the axis of the bell holder will be misaligned. Therefore, in order to correct the axis misalignment of the bell holder, the edge of the bell holder is shaped by cutting or grinding the edge of the bell holder while it is attached to the sleeve of the work. As a result, it takes a lot of time to replace the bell holder, and it takes a long time to set up the lens centering machine, resulting in a low operating rate.

The present invention has been made in view of the problems of the related art described above, and provides a bell holder for a lens centering machine that does not require much effort to attach the bell holder and can shorten the setup time of the lens centering machine. One purpose is to provide a mounting structure.

(Means for Solving the Problems) In order to achieve the object described in E, the bell holder mounting structure of the lens centering machine of the present invention has the following features: In the bell clamp of the lens centering machine, the legs of the bell holder and the workpiece to which the bell holder is attached The shafts are provided with a radial fitting portion and a vertical abutment portion, a suction hole is formed in the bell holder and the work shaft, respectively, and the bell holder and the work shaft are connected by a coupling member having a through hole. It is characterized by being combined.

[Effect]

When attaching the bell holder to the workpiece shaft, the legs of the bell holder and the mutually provided radial fitting parts of the workpiece 1h5 are fitted, and the axial abutting parts are brought into contact and positioned, and the through hole is drilled. Connect with the attached connecting member. Therefore, since there is no need to rotate the bell holder itself, the radial fitting portion and axial abutment portion provided between the leg portion of the bell holder and the work shaft are not worn out during installation. In addition, since the suction holes drilled in the bell holder and the work shaft are communicated with each other by the H through hole drilled in the coupling member, a suction means for sucking the lens to the bell holder is connected to the work shaft side. I can do it.

(Example) Embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a first embodiment, in which the bell holder 1 is opened [
One part has an edge 1a on the peripheral part, and the bottom wall has a suction hole 4.
is bored, and a cylindrical leg portion 1b is provided to protrude so as to surround the suction hole 4. The suction hole 4 is also a hole into which a bolt 3 having a through hole 3a penetrating in the axial direction is inserted, and has a large diameter portion 4a having an inner diameter large enough to loosely fit the head of the bolt 3, and It is composed of a small diameter portion 4b having an inner diameter slightly larger than the outer diameter of the bolt 3.

On the other hand, in order to form an axial abutment part 2a and a radial anastomosis part in the workpiece @2, a protruding part 2a having a smaller diameter than the workpiece shaft 2 is formed at the tip of the workpiece @2 on the bell holder side. A male threaded portion 2C is provided in a protruding manner on the protruding portion 2a. Reference numeral 5 denotes a suction hole drilled in the axial direction of the work piece 2, which is open at the distal end surface of the male threaded portion 2c, and a female threaded portion 5a is provided at the distal end portion of the suction hole 5.

In this embodiment, the leg part 1b of the bell holder l is fitted into the protrusion part 2a of the work shaft 2, and the leg part 1b is fitted into the protruding part 2a of the workpiece shaft 2. The end surface of b is work shaft 2
After positioning the bell holder 1 by pushing it until it abuts against the abutting portion 2b, the bolt 3 serving as a coupling member is screwed into the female threaded portion 5a and tightened, thereby attaching the bell holder 1 to the work shaft 2.

Therefore, since there is no need to rotate the bell holder 1 itself during attachment, there is no fear that the end surface of the leg portion 1b serving as the axial abutment portion and the abutment portion 2b of the workpiece 1lIII2 will be worn out. Also, work @
Since it is only necessary to form the female screw portion 5a on the shaft 2, it is also possible to use the conventional work shaft described above.

FIG. 2 shows a second embodiment, in which the workpiece @12 has a protruding portion 12a having a smaller diameter than the workpiece llIIb12 for forming a fitting portion and an abutment portion 12b at the tip on the hell holder side.
is formed in the axial center of the protrusion 12a, and a dovetail groove 15a whose short side is open on the distal end surface thereof.
is formed perpendicularly to the axis, and the barb side of the groove 15a communicates with the suction hole 15.

On the other hand, the bell holder 11 has an edge fla around its opening, similar to the first embodiment, and a suction hole 14 is bored in the bottom wall, and a cylinder is formed to surround the suction hole 14. A shaped leg portion 1lb is provided in a protruding manner. The suction hole 14 is composed of a large diameter part 14a having an inner diameter large enough to loosely fit the nut 13b, and a small diameter part 14b having a slightly larger diameter than the outer diameter of the T-shaped bolt 13 having an anchor 13c at one end. Reference numeral 13a indicates i! which is drilled in the sleeve direction of T-shaped bolt l3. These T-shaped bolts 13 and nuts 13b constitute a connecting member.

In this embodiment, the anchor 13c of the T-shaped bolt 13 is inserted into the groove 15a of the workpiece @12 in advance, and the bell holder l1
After fitting the leg part ttb into the protruding part 12a of the workpiece sleeve 1z, and positioning it by pushing it until the tip of the leg part 1lb, which constitutes the axial abutment part, abuts the abutment part 12b of the workpiece shaft 12, By screwing and tightening the nut 13b onto the threaded portion of the T-shaped bolt 13 fitted into the suction hole 14 of the bell holder 11, a groove 1 is formed on both end surfaces of the anchor 13c.
5a, and press the bell holder 11 onto the work shaft l.
Attach to 2.

FIG. 3 shows a third embodiment, in which a bell holder 21 has an edge 21a at a portion M around its opening, and a suction hole 24 is bored in the bottom wall having a larger diameter than the bell holder 21. Additionally, a 2lb leg is integrally protruded from the periphery of the bottom wall.
A flange 21c is physically provided on the outer periphery of the tip of the leg 2lb.

On the other hand, since the workpiece shaft 22 having the suction hole 25 has an abutment part 22b and a fitting part, the workpiece IliI!
A protruding portion 22a having a diameter smaller than +22 is formed, and a male threaded portion 22c is formed on the outer peripheral surface near the abutting portion 22b, into which a nut 23 having an engaging portion 23a is screwed.
is not formed.

In this embodiment, the leg portion 2lb of the bell holder 21 is attached to the workpiece E.
Fit the protrusion 22a of the I+III 22, and attach the leg 2lb.
After positioning by pushing until the tip end surface of the work shaft 22 abuts against the abutment part 22b of the work shaft 22, the nut 23 is screwed onto the tiff male threaded part 22c and tightened. is pressed against the abutting portion 22b of the workpiece shaft 22, and the bell holder 21 is pressed against the workpiece Il! Attach to lk22.

According to this embodiment, the second bell holder can be made small in diameter, and is suitable for centering a lens with a small diameter.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

There was no risk of the radial fitting part and axial abutting part of the workpiece shaft and bell holder being worn out, and the mounting accuracy of the workpiece shaft and bell holder was maintained, so it was necessary to perform bevel machining of the edge of the bell holder after installing the bell holder. disappears. As a result, centering can be performed directly by attaching a previously modified bell holder to the work shaft, reducing setup time and improving the operating rate of the centering machine.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part showing a first embodiment of the bell holder mounting structure of the present invention, FIG. 2 is a cross-sectional view of a main part showing a second embodiment, and FIG. FIG. 4 is a sectional view of a main part showing a conventional bell holder mounting structure. 1, 11.21...Bell holder la, lla, 21a---Edge lb, llb, 2lb---Leg part 2, 12.22...Work shaft 2a, 12a, 22a---Protrusion part 2b, 12b. 22b...Abutting portions 2c, 22c-
...Male thread part 3...Bolt 3a, 13a - Through hole 4, 14, 24.5, 15, 4a, 14a...Large diameter part 4b, 14b...Small diameter part 5a...Female thread part 13. ...T-shaped bolt 13b. 23- Nut 13c Anchor 15a'' Groove 21c Flange 23a Engaging portion.

Claims (1)

[Claims] 1. In the bell clamp of the lens centering machine, the legs of the bell holder and the work shaft to which the bell holder is attached are mutually connected.
a radial fitting portion and an axial abutment portion are provided, and suction holes are bored in the bell holder and the work shaft, respectively;
A bell holder mounting structure for a lens centering machine, characterized in that the bell holder and the work shaft are coupled by a coupling member having a through hole.