JPH0733254Y2 - Structure of LBP drum fixing knob - Google Patents

Description

[Detailed Description of the Invention] [Field of Use of the Invention] The present invention relates to a structure of a mounting knob for fixing a drum of an LBP.

[Background of the invention]

An example of a conventional LBP drum fixing knob will be described with reference to FIG. A motor 2 is fixed to one end of the mechanical frame 1 with a screw 3, and a drum drive plate 4 is axially attached to a motor shaft 2a. Further, by fitting the fitting portion 4a of the drum drive plate 4 into the hole 5a of the drum 5 and the pin 6 press-fitted into the drum drive plate 4 into the hole 5b,
The driving force of the motor 2 is transmitted to the drum 5. On the other hand, a flange 7 having a male screw portion 7a on the outer periphery is fixed to a hole 1a on the opposite side of the mechanical frame 1 with a screw 3a, and a fixed shaft 8 supporting the drum 5 is provided with a spring retainer 9 and a hole 5c of the drum 5. The roller 10 that fits with is locked by the Nukidme ring 11.
Further, the fixed shaft 8 is axially attached by a pressure by inserting a spring 13 into a knob 12 having an internal thread 12a on the inner circumference. 7th
As shown in the figure, when the drum 5 is mounted, the knob 12 may be screwed in until the knob 12 comes into contact with the end 7b of the flange 7. At this time, due to the compression of the spring 13, the drum 5 is always pressed against the drum drive plate 4 side and does not rattle.

When removing the drum 5 due to damage or the like, the knob 12 may be loosened from the flange 7 to pull out the entire knob 12.

In this configuration, the knob 12 must be removed when the drum 5 is replaced, which may be dangerous if the knob 12 is dropped, and conversely, the knob 12 must be rotated many times when the drum 5 is mounted. It had the drawback of being troublesome.

Further, when the knob 12 is rotated, the knob 12 is attached to the end 7b of the flange 7.
When abutting against each other, there is a disadvantage that the rotation of the knob 12 is stopped and the strength of force exerts a great individual difference.

[Purpose of device]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to simplify the operation of the knob when replacing the drum to enhance safety.

[Outline of device]

The present invention is devised so that a fixed shaft having first and second groove portions is loosely engaged with a flange having two press-fitting pins, and the knob is moved in the axial direction at a constant rotation angle of the knob. Is. The present invention will be described below with reference to the accompanying drawings.

[Example of device]

1 is a vertical sectional view showing a fixing knob when a drum is mounted according to the present invention, FIG. 2 is a vertical sectional view showing the fixing knob when a drum is removed, FIG. 3 is an overall perspective view of a fixing shaft, and FIG. FIG. 3 is an overall perspective view of a knob. A flange 14 having two press-fitting pins 15 protruding in the inner diameter direction is fixed to the mechanical frame 1 by screws 3 at a position facing each other by 180 °. Flange
One of the fixed shafts 16 having an outer diameter that fits the inner diameter of 14 has a first groove portion 16a formed to face the axial direction 180 ° with a width larger than the outer diameter of the press-fitting pin 15, and a first groove portion 16a. A second groove portion 16b, which is longer than the first groove portion 16a in the axial direction, is provided at a position 90 ° from the groove portion 16a. A spring 13, a spring retainer 9, and a roller 10 are locked to the other side of the fixed shaft 16 by a bubble ring 11. In addition, the engagement between the drum 5 and the roller 10 and the drum 5
The holding structure on the opposite side of is similar to the conventional example. Fixed axis
A knob 17 having a recess 17a formed by cutting out between the first groove portion 16a and the second groove portion 16b of the fixed shaft 16 is fixed to the shaft 16 with a screw 3b so as to have the positional relationship shown in FIG. ing.

Next, the press-fitting pin 15 of the flange 14 and the first groove portion 16 of the fixed shaft 16
The positional relationship between a and the second groove portion 16b will be described in detail. First
In the mounted state of the drum 5 in the figure, the press-fitting pin 15 abuts against the end of the first groove portion 16a of the fixed shaft 16 by the compression of the spring 13 and is locked. From this state, the knob 17 fixed to the fixed shaft 16 is pushed until the press-fitting pin 15 comes into contact with the wall of the recess 17a of the knob 17, and the knob 17 is rotated counterclockwise by 90 °, and the second groove portion of the fixed shaft 16 is rotated. Press-fit pin 1 on 16b and flange 14
When the position of 5 is aligned, the knob 17 is pulled out until the wall of the second groove portion 16b and the press-fitting pin 15 come into contact with each other, and the drum 5 is removed, as shown in FIG. To mount the drum 5, reverse the above operation. Mark the knob 17 and
If the range of the rotation position of the knob 17 is designated by a name plate or the like, it becomes easier.

Needless to say, the knob 17 never comes off the flange 14 in the state shown in FIG.

FIG. 6 shows a cutout 16d corresponding to the recess 17a of the knob 17 provided between the first groove 16a and the second groove 16b of the fixed shaft 16. In this case, the recess 17a of the knob 17 is provided. Can be deleted.
The operation of the knob 17 is similar to that described above.

[Effect of device]

As described above, according to the present invention, the two press-fitting pins protruding in the inner diameter direction of the flange fixed to the mechanical frame and the first and second groove portions formed with different lengths in the axial direction of the fixed shaft. By engaging with, the fixed shaft can be moved in the axial direction with a constant rotation angle of the knob, so there is no risk of dropping the knob when replacing the drum, and the drum can be easily and reliably fixed by a slight rotation of the knob. can do.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a drum fixing knob structure of the present invention when the drum is mounted, FIG. 2 is a longitudinal sectional view showing the drum detached, FIG. 3 is a perspective view showing a fixed shaft, and FIG. 4 is a knob. FIG. 5 is a schematic view showing the positional relationship between the press-fitting pin and the first and second groove portions and the concave portion of the knob. FIG. 6 is a perspective view showing another embodiment of the fixed shaft, and FIG. FIG. 6 is a vertical sectional view showing an example of the structure of a conventional drum fixing knob. In the figure, 5 is a drum, 7 and 14 are flanges, 8 and 16 are fixed shafts, 9 is a spring retainer, 10 is a roller, 12 and 17 are knobs, 13 is a spring, 15 is a press-fit pin, and 16a is a first groove portion. , 16b are second groove portions, and 17a is a concave portion.

Continuation of the front page (56) References JP-A-60-142383 (JP, A) JP-A-59-189386 (JP, A) JP-A-62-35388 (JP, A) Actual development Shou-51-73042 (JP , U) Actual opening Sho 59-161166 (JP, U) Actual opening Sho 49-149747 (JP, U) Actual opening Sho 50-7040 (JP, U) Actual opening Sho 58-165323 (JP, U) Actual opening Sho 61-81012 (JP, U) Actual Opening Sho 61-156718 (JP, U) Special Public Examined Sho 57-54651 (JP, B2) Special Public Sho 57-10432 (JP, B2) Actual Public Sho 54-22322 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A flange having two press-fitting pins protruding in the inner diameter direction and facing each other by 180 °, and an outer diameter loosely fitted to the inner diameter of the flange, and having a width larger than the outer diameter of the press-fitting pin in the axial direction. A fixed groove provided at one end with a first groove portion provided to face 180 ° and a second groove portion provided to face 180 ° longer than the first groove portion in the axial direction; A roller rotatably supported at an end, a spring which is locked on the fixed shaft by a spring retainer and biases the roller in a direction away from the fixed shaft, and an edge portion of the fixed shaft on the groove side. A knob having a recessed portion fixed to the first groove portion and a second groove portion facing each other, and the knob is provided to the flange with the first groove portion and the second groove portion. By rotating between the knob and the fixed shaft in the axial direction. Structure of drum fixed knob LBP, characterized in that a combination rotatably on.