FR2467316A1 - PIECE FORMING BEARING, FOR THE CYLINDER OF AN OFFICE MACHINE FOR EXAMPLE - Google Patents

Abstract

This plastic part 1 is placed in a cutout 15 of a side wall 10, made of sheet metal for example, on which it rests by two clamping branches 11, 12, which ensures the locking. After compression of the branches 11, 12, the part 1 can easily be removed, with the cylinder 4, from the cutout 15 of the wall 10. (CF DRAWING IN BOPI)

Description

Bearing part, for the cylinder of a desktop machine by

example.

  The invention relates to a bearing, for the cylinder of a desktop machine for example, which receives the axis of the cylinder or another rotary element and is arranged in a side wall of the

  desktop machine or in a similar medium.

  The cylinders of typewriters must be easily removed from the machine for after-sales service. Of another

  side, they must be securely held in place during the

  tioning. It has become commonplace, on modern typewriters

  a clamping bar on the side of the side walls,

  the trolley or the frame of the machine. The end of the axis of the cy-

  lindre is in this case located in a slot-shaped recess and

  the axis can be removed upwards after detachment of the two bars.

  clamps at the ends of the axle. Such a device is described and shown, for example, in the German Patent 309,408. Known devices of this type are relatively expensive, because they consist of several pieces and because their assembly also requires a considerable time. It adds that the bars can not be arranged in the plane of the side walls but must be

  placed next to them. This has the consequence that the axis of the cylinder

  dre is solicited by forces that tend to incline the axis and

  which increase its friction during the rotation.

  The aim of the invention is to create a landing that does not present

  the disadvantages mentioned above.

  According to an essential characteristic of the invention, the bearing is formed of a part arranged by a trapezoidal groove in a cutout of the side wall and bearing on this wall

  by two clamping legs that are integral with the workpiece.

  One of the advantages of such a bearing is the simplicity of its manufacture since it can be produced by injection molding,

  for example. Its locking in the side wall does not ask -

  additional pieces. At most, a compression spring may be required between the clamping legs. However, the main advantage provided by the bearing according to the invention is that the axis of the cylinder is no longer solicited by support forces

  which are offset with respect to the side wall.

  Other features and advantages of the invention

  will be clearer from the following description of a

  non-limiting example of embodiment, and the accompanying drawings, in which: Figure 1 is an exploded view, in perspective, of a bearing part according to the invention and parts of a side wall and a cylinder; a desktop machine; and FIG. 2 is a side view of these three elements.

in the assembled state.

  The bearing part 1 has an opening 2 for receiving an end of the axis 3 of a cylinder 4. One of the two buttons for rotating the cylinder-can be screwed into a hole 5

of axis 3.

  On one side, the piece 1 has two flanges 6 and 7 sei -'-

  circular, whose radius is greater than that of the core 8 of the part 1. The inner sides of the flanges 6 and 7 being bevelled,

  they form between them a trapezoidal groove 9, whose integral width

  upper corresponds to the thickness of the side walls 10 of the machine .;

  On the other side, the room 1 carries two branches of ser -

  He and 12, one of which, -12, is elastic and the other, 11, is bent and forms a beveled shoulder 13. A compression spring 14 can

  in addition, be provided between the clamping legs 11 and 12.

  The part 1 is disposed in the side wall 10 in a corresponding cutout 15. The cutout 15 consists of a part

  lower 16 and an upper portion 17 which is wider and

  which is open at the top. An edge 18 of the upper part 17 of the

  cut door up a nose 19 whose lower side 20 is oblique.

  The assembly of the cylinder takes place as described below.

  Before the buttons for cylinder rotation are screwed

  in place in holes 5, part 1 for each of the two ends

  of the axis is threaded by spn opening 2 on the axis 3 of the cy-

  4. While the two clamping arms 11 and 12 are held in compression, the workpiece. is then introduced from above into the cutout 15 of the side wall 10. The trapezotal-throat 9 is then placed in the lower part 16 of the cutout 15, so that the cylinder is immobilized in the plane of the side wall 10 by the edges 16a, 16b and 16c. The shoulder 13 of the clamping branch 11 is applied against the oblique lower side 20 of the nose 19 and thus prevents the upward movement of the part 1. The spring 14 presses the elastic clamping branch 12 against the

  angular portion 17a at the top of the upper portion 17 of the de-

  chopped off. The shoulder 13 can not be released unintentionally

  from its position under the nose 19. To remove the cylinder from the

  china, the clamping legs are first compressed and the bearing piece is then turned slightly in the direction of the arrow A in Figure 2; the room can then be cleared

  easily up out of the cutout 15 of the side wall 10.

  As already indicated, part 1 is provided on each side of the cylinder.

  dre 4. It can be part of a typewriter or other office machine with a mobile paper holder or fixed, whatever. If the paper support is mobile, the

  side piece 10 is at the same time the side wall of the carriage.

  If the paper support is stationary, the side part 10 may be part of the construction of the machine. In large typewriters, where the cylinder alone represents a considerable mass, it is recommended to provide the compression spring 14 between the clamping legs 11 and 12. This spring may be omitted.

  on smaller machines and, in particular, when

  constituent material of the bearing parts 1 has the properties

necessary for this purpose.

  As can be seen in the drawings, the bearing part according to the invention greatly simplifies the mounting of the cylinder and makes it much less expensive since faster, without the bearing function being affected in any harmful manner. A particular advantage is that, as already described, the pressure between the nose 19, the shoulder 13 and the axis 3 of the cylinder of the machine is transmitted exactly in the plane of the wall

lateral 10.

R E V E N DI CA T IONS

---- --- ---- --- - ______--

  1. Bearing, for the cylinder of a desktop machine for example, which receives the axis of the cylinder or other rotary element and is arranged in a side wall of the office machine or in a similar medium, characterized in that it is formed of a part (1) arranged by a trapezoidal groove (9) in a cutout (15) of the lateral wall (10) and resting on this wall by two clamping branches (11, 12 ) that are in one piece with the

piece (1).

  2. Bearing according to claim 1, characterized in that a clamping leg (11) is placed by a shoulder (13) under a nose (19) of the side wall (10), so that the part (1) )

  is pushed into the cutout (15) of the side wall (10).

  3. Bearing according to claim 1 or 2, characterized in that a compression spring (14) is arranged between the branches

tightening (11,12).