FR2654984A1 - AUTOMATIC MINING FEEDING APPARATUS FOR AUTOMATIC DRAWING MACHINE. - Google Patents

Abstract

According to the invention, an arm retaining a mine is connected to a height training device (10) of a head (8); the automatic feeding apparatus has a mine tank (26) and a supply shutter (32) for dropping the mines contained in the tank one by one; the shutter (32) is controlled, to open and close, by a driving force of the head and so that the mine regularly falls from the reservoir (26) into the instrument (16) which is just below it; the mine is driven deep into the writing instrument by vertical drive of the height drive (10).

Description

The present invention relates to an automatic feeding device for

  mines to automatically supply writing mines to an instrument

  writing an automatic drawing machine.

  The disclosure of Japanese Patent Application NO 63-260495 discloses an automatic mine feeder where a mine chute port provided at a lower portion of a mine tank is opened by a shutter mechanism to to drop a mine in the tank to a mechanical pencil placed under the tank, then an impact mechanism is triggered by a device consisting of a solenoid placed on the side of the machine and, consequently, the mine which fell into the mechanical pencil or writing instrument is supplied to a

  clamping mechanism in the mechanical pencil.

  According to the above conventional automatic feeding apparatus, it is necessary to place the drive mechanism of the shock mechanism of the writing instrument separately on the body of the machine, resulting in a large and

  complicated by it, at a high price.

  The invention will be better understood, and other aims, characteristics, details and advantages thereof

  will appear more clearly during the description

  Explanatory which will follow made with reference to the appended schematic drawings given solely by way of example illustrating an embodiment of the invention, and in which: Figure I is an elevation view, partially broken away, of the apparatus automatic supply of mines according to the present invention; Figure 2 is a perspective view of a large portion of this apparatus; FIG. 3 shows a perspective view, partially cut away, of the relationship between the mine reservoir and the mine supply shutter. FIG. 4 is a side elevation view of the large portion to explain the supply operation. in mine; Figure 5 is a view similar to Figure 4, of another step; Figure 6 is another view similar to Figure 4, of another step; and FIG. 7 is a side elevation view of the portion representing an operation for removing the

remaining mines.

  An embodiment of the automatic mine feeding apparatus of an automatic drawing machine according to the present invention will be

  explained in detail with reference to the accompanying drawings.

  As shown in Figure 2, a drawing board 2 is fixed to the body 4 of the automatic drawing machine, and on this board 2 is supported a rail 6 in order to move parallel to the axis X A head 8 is supported on the rail 6 in order to move along it As shown in FIG. 1, a height training device 10 consisting of a well-known, movable coil mechanism is fixed to a base panel of the head 8 A elevation member 14 is connected to a column 12 erected on the base panel of the head 8 by a linear race bearing. An arm 14 ′ for supporting the instrument is fixed to the elevation member 14 so that the arm 14 ′ can detachably hold a conventional pencil or writing instrument 16 provided with a mechanism 16 a for striking it and with a clamping mechanism The mechanism 16 a opens a clamping portion of the clamping mechanism and is located to the upper portion of the writing instrument ture 16 The clamping mechanism 16 a in the writing instrument 16 protrudes elastically upwards from the upper end of a lead box of the instrument 16 A portion of flange 18 is fixed to the mechanism 16 a The mechanism 16 has an axial hole formed therein for receiving mines and this axial hole opens out in the center of the upper end of the mechanism 16 has a base 20 for retaining or installing the mine reservoir of the supply apparatus 22

  automatic in mines is fixed to the body 4 of the machine.

  Several mine tanks 26 are supported on the upper horizontal face 20a of the base 20 by means of fixing rings 24 in order to rotate around predetermined positions A lower portion of mine tank 26 has a cylindrical lower member 26a attached to it fixed as shown in FIG. 3 By an axial hole formed in the center of the lower member 26 a, a lead guide 28, in the form of a tube, is biased downward by sliding The lower end of the guide 28 protrudes a predetermined length of the lower end of the lower member 26a or of the lower face of the horizontal portion 20a A lower open hole of the

  guide 28 forms a mine drop hole from the reservoir 26.

  The reservoir 26 contains several mines 39, which are adapted to be led to the guide 28 at the rate of one to one. A shutter 32 for supplying mines is placed under the horizontal portion 20 a and it consists of a supported flat cam by a shaft 34 in order to tilt parallel to the underside of the horizontal portion 20 a The shutter 32 has a catch 36

  formed on the opposite side of the shaft 34, centering its rotation.

  An engagement arm 38, hanging from the reservoir 26, fits in the catch 36 The shutter 32 has a lower horizontal face 32 a and an upper horizontal face 32 b which are formed there respectively Along the boundary between the two faces 32 a and 32 b is formed an upper bias face 32 c of a predetermined length At a position on the lower face of the shutter 32 corresponding to the position of the upper bias face 32 c is formed a oblique lower face 32 d The shutter 32 is traversed by a hole 40 through which the mines fall, which is formed so as to open into the upper horizontal face 32 b. The guide 28 is placed on a tilting track around the shaft 34 The shutter 32 is biased in a predetermined direction of rotation due to a spring 42, so that the shutter 32 comes into engagement l O with a stop (not shown) formed on the portion

  horizontal top 20 has an installation base 20.

  An arm 44, provided with a forked portion, is fixed to the hanging portion 20b of the installation base 20 so as to be under the mine tank 26 The body 4 of the machine has an orifice 46 for discharging the remaining mines which is located below the arm 44 and the evacuation orifice 46 has a sensor 48 for detecting the fall of the remaining mines The movement of the rail 6 in the direction of the X axis along the drawing board 2 , the movement of the head 8 in the direction of the axis Y along the rail 6 and the elevation of the outlet body 1 Oa of the drive apparatus 10 in the direction of the axis Z are, respectively, controlled by a controller which receives the drawing data from the computer h 6 te It is possible to change the type of the installation base 20 of the

  mine tanks for a rotary type.

  The operation of the above embodiment will now be explained with reference to the accompanying drawings. When the controller detects that the writing instrument 16 retained by the elevating member or arm 14 ′ of the head 8 no longer has mines, the head 8 moves as shown in FIG. 1 until it find in front of the predetermined mine feed position and the apparatus 10 is driven to lower the arm 14 'to the predetermined level Then, as shown in FIG. 4, the head 8 passes to a position at which the mechanism 16 has trigger contacts the lower side at an angle 32 d of the shutter 32 Then, the head 8 moves back and forth along the direction of an arrow, over a stroke of about 1 mm, or else l the rotary drive is driven to raise or lower the writing instrument 16 several times in order to push the underside at an angle 32 d by the upper end of the instrument 16 An upward movement of the instrument 16 or a horizontal back and forth movement of the head 8 swings uler the shutter 32 around the rotary shaft 34, resulting in a reciprocating and tilting rotation of the reservoir 26 in a plane

  horizontal in cooperation with the shutter 32.

  Simultaneously, the guide 28 has a back-and-forth movement between the lower horizontal face 32 and the upper oblique face 32 c of the shutter 32 and rocks vertically. As a result, only one of the mines 30 contained in the reservoir 26 falls in the guide 28 When the lower end of the guide 28 contacts the lower horizontal face 32 a of the shutter 32, the upper end of the guide 28 is at the same level as

  that of the upper face of the lower member 28 a.

  When the lower end of the guide 28 contacts the upper oblique face 32 a or the upper horizontal face 32 b of the shutter 32, the upper end of the guide 28 protrudes from the upper face of the member

lower 26 a.

  Then, as shown in FIG. 5, the head 8 continues to move and the writing instrument 16 passes to its mine falling position, where it has a horizontal reciprocating movement with a stroke d '' about 1 mm In place of this horizontal back-and-forth movement, the writing instrument 16 rises relatively to the lower bias face 32 d Then, the guide 28 passes over the upper horizontal face 32 b of the shutter 32 and the upper end of the guide 28 protrudes from the upper face of the lower member 26 a of the mine reservoir 26 in order to prevent other mines from entering the

guide 28.

  At the same time as a horizontal reciprocating movement, or an elevating movement of the writing instrument 16, the shutter 32 revolves reciprocally and simultaneously the mine reservoir rotates and rocks or oscillates in a horizontal plane in order to shake others

  unnecessary mines 30 from the upper face of the guide 28.

  Then, the writing instrument 16 stops at the mine drop position and the apparatus 10 is driven in order to raise the writing instrument 16 by a predetermined height as shown in FIG. 6 Consequently , the upper face of the mechanism 16 has pushed the lower face at an angle 32 d of the shutter 32 and the shutter 32 rotates to its predetermined position around the shaft 34 Consequently, the insertion hole of the lead of the mechanism 16 a, the mine lead hole 40 of the shutter 32 and the lead mine hole of the guide 28, respectively, come in correspondence along the same vertical line and a single mine in the guide 8 falls into the axial hole of the mechanism 16a Then, the controller puts the head 8 and the lower end of the writing instrument 16 back in place, as shown in Figure 7, just above the mine discharge orifice remaining 46 Then, the upper face of the flange member 18 of the mechanism e 16 a is adjacent to the

  underside of the forked portion of the arm 44.

  Then, the controller raises the drive device 10 in height in order to raise the writing instrument 16 several times to strike the collar member 18 vertically relative to a lead box of 7, the instrument 16 in order to take a new mine out of the box and to evacuate the mine remaining in the box, causing the remaining mine to fall through the orifice

  evacuation of remaining mines 46.

  It should be noted that the triggering mechanism of the writing instrument of the automatic mine feeding apparatus according to the present invention is driven by the head height driving apparatus, so do not install any separate drive mechanism in the feed mechanism portion

  automatic in mines on the machine side.

Claims (1)

R E V E N D I C A T I O N   Automatic mine feeding apparatus for an automatic drawing machine, of the type comprising a supported head movable along a paper mounting face of the drawing apparatus, a mine reservoir provided on the drawing machine side, a arm retaining the mine, cooperating with a height training device installed in the head, a mine clamping mechanism, a writing instrument provided with a trigger mechanism for opening the clamping mechanism and a clamping portion the clamping mechanism, the writing instrument being kept removable on the mine support arm, a shutter mechanism for opening and closing, a mine drop orifice which is located below the mine tank, characterized in that the shutter mechanism (32) opens the mine drop hole to drop a mine contained in a mine tank (26) and said mine is received by the writing instrument (16)placed below the mine tank and an arm (44) is provided on the drawing machine side, the trigger mechanism being in engagement with said arm, then, the height drive (10) raises the trigger mechanism of the writing instrument in order to provide mine to this instrument (16).