JPS5949920B2 - Head support device for track type drafting machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a drawing machine that maintains the parallelism of a scale at any point on a drawing board by horizontal rails and vertical rails that are combined perpendicularly to each other, in which a scale is attached and The present invention relates to a device that supports a head portion for operating the rotation and parallel movement of the scale in a stationary state at a position where it floats together with the scale relative to the drawing board.

Generally, when drawing on a drawing board using a drawing machine, the drawing paper fixed to the drawing board is re-covered and moved, or the drawing paper is transferred to the paper surface plate attached to the lower surface of the head. In order to prevent the scale from being soiled by sliding on the drawing paper, it is desirable to support the head section together with the scale in a floating state with respect to the drawing board.

Various devices for floating and supporting the head above the drawing board have been proposed in the past, but in the conventional floating support device for the head, the floating position of the head is limited to only one place. In order to float and support the head, the head must be rotated to a predetermined position, resulting in poor drafting work efficiency.

Furthermore, in a floating support device that floats and supports the head using a resilient member such as a spring, there is a risk that the flying height may change depending on the inclination angle of the drawing board.

Therefore, a mechanism for adjusting the elastic force of the elastic member so that the flying height of the head portion is constant is added, which complicates the structure.

The present invention has been proposed in view of the above-mentioned conventional circumstances, and an object of the present invention is to enable the head portion to be floated and supported at an arbitrary height position above the drawing board.

Furthermore, the present invention allows the head part to maintain a constant floating level at any height position, regardless of changes in the vertical force acting on the drawing board surface of the head part in connection with changes in the inclination angle of the drawing board. The purpose is to be able to hold it in quantity.

Furthermore, it is an object of the present invention to stabilize the state in which the head section is kept floating, and to ensure that the head section can be kept floating even if the head section suddenly falls.

SUMMARY OF THE INVENTION An object of the present invention is to provide a head support device for supporting a head of a drafting machine in a suspended state relative to a drawing board and in a stationary state.

To this end, the present invention comprises a coupling bracket rigidly connected to the longitudinal carriage and a pivoting hinge member rigidly connected to the head against vertical movement of the head relative to the drawing board. Rotating fulcrum shafts are provided on the head side and the vertical carriage side of the opening/closing hinge member disposed between the opening/closing hinge member, the connecting bracket, and the rotating hinge member about these pivot shafts. A binikin gear, which is freely connected and rotatable about a rotation fulcrum shaft on the head side as a central axis, is fixed to the rotation hinge member, and is attached to the opening/closing hinge member with respect to the head side and the hinge member. At least a part of the slide block arranged to slide between the vertical carriage sides is provided with a rack that engages with the vinyl gear, and the end face of the slide block side and the stop collar provided on the connection bracket are connected to each other. Also in contact with the slide.

The drawing board is characterized in that the head part is made detachable so that the drop of the head part is supported by the stopper, and the head part is stopped at a position floating relative to the drawing board.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2.

In Figure 1, . A scale (not shown) is attached to the head 1 supported by the head support device A of the present invention via a scale attachment plate (not shown).

A grip 2 is provided at the upper end portion of the head portion 1 .

This grip 2 is rotatable with respect to a fixed shaft 3 of the head portion 1 together with a main shaft and a scale mounting plate (not shown).

The fixed shaft 3 is unrotatably supported by a pivot hinge member 7 integrally formed with a head holder 4 that surrounds the fixed shaft 3.

Is the rotating hinge member 7 at one end? a (the left end of the rotating hinge member 7 in the figure) is connected to the head side 5a of the opening/closing hinge member 5, and the opening/closing hinge member 5 is connected to the vertical carriage 18 at the vertical carriage side 5b of the opening/closing hinge member 5. It is connected to a connecting bracket 6 which is rigidly connected to.

The pivoting hinge member 7 is used to perform a slight pivoting motion relative to the opening/closing hinge member 5 when the head portion 1 is brought into close contact with a drawing board (not shown) or when it is slightly lifted. Yes, the opening/closing hinge member 5 is attached to the head part 1.
and the scale is placed above the drawing board against the drawing board (rotating counterclockwise in Figure 1), or from the state where the scale is placed upright against the drawing board, the head part 1 is brought into close contact with the drawing board. This is for making a large pivoting motion with respect to the coupling bracket 6 when the coupling bracket 6 is rotated (rotated clockwise in FIG. 1).

Since the vertical carriage 18 is attached to the vertical rail 19 so that it cannot move in the horizontal axis direction of the vertical rail 19, the connecting bracket 6 is attached to the vertical rail 19 as shown in FIG. In the state shown in FIG. 2, it is set so that it cannot move in the left-right direction.

A anti-Japanese pinion gear 8 is fixed to one end 7a of the pivot hinge member 7 so as to be non-rotatable.

The rotation hinge member 7 is pivotally connected to the opening/closing hinge member 5 by a rotation fulcrum shaft 9.

A slide block 11 having a rack 10 formed on the head side 11a that meshes with the pinion gear 8 is disposed on the lower end side of the opening/closing hinge member 5 so as to be slidable with respect to the opening/closing hinge member 5.

The slide block 11 has a long hole 12 that is long in the sliding direction.
Two bolts 13 are inserted into the elongated holes 12 to attach the slide block 11 slidably to the opening/closing hinge member 5, and these bolts 13 have a function of guiding the sliding of the slide block 11. is fulfilled.

An end surface 14 perpendicular to the sliding direction of the slide block 11 is formed on the vertical carriage side i1b of the slide block 11.

The opening/closing hinge member 5 is pivotally connected to the connecting bracket 6 by a rotation fulcrum shaft 15.

A screw member 17 serving as a stopper is screwed onto the rising portion 16 of the connecting bracket 6, and the hemispherical head 17a of the screw member 17 faces the opening/closing hinge member 5.

By adjusting the amount of protrusion of the head 17a of the screw member 170, the height at which the head portion 1 is supported relative to the drawing board can be freely set.

The screw member 17 can come into contact with the end surface 14 of the slide block 11, and functions as a stopper to prevent the slide block 11 from moving.

Next, the operation of the head support device A will be explained.

That is, when the head part 1 is lifted horizontally with respect to the drawing board by gripping the grip part 2, the opening/closing hinge member 5 is tilted as shown in FIG.

Since this opening/closing hinge member 5 rotates around the rotation fulcrum shaft 15, the end face 14 of the system slide block 11 will be caused by the tilting of this opening/closing hinge member 5. It is further away from the head 17a than in the case of FIG.

However, since the rank 10 of the slide block 11 and the pinion gear 8 are engaged with each other, the slide block 11 slides diagonally downward to the left in FIG.

As a result, the end surface 14 of the system slide block 11 comes into strong contact with the head 17a of the screw member 17.

Next, when you release your hand from the grip 2 while lifting the head part 1, the clock in FIG. A rotational moment in the direction is generated in this head part 1.

As a result, a thrust force acts on the slide block 11 in the direction of the arrow B, and therefore the slide block 11 receives a reaction force in the direction opposite to the arrow B from the head 17a of the screw member 17 at the end face 14.

At the same time, the slide block 11 is disposed between the end surface 14 of the slide block 11 and the head 17a of the screw member 170.
A frictional force commensurate with the thrust in the direction of arrow B acting on is generated, and the force F in the direction of arrow C prevents slipping between the head 17a of the threaded member 17 and the slide block 11.

As a result, it becomes possible to support the head portion 1 in a suspended and stationary state above the drawing board.

Moreover, regardless of the amount of rotation of the opening/closing hinge member 5 (the height position of the rotation fulcrum shaft 9 on the head section 1 side), the opening/closing hinge member 5
The end face 14 of the block 11 slides due to the change in the amount of relative rotation between the slide block 11 and the head part 1.
is in contact with the head portion 17a of the screw member 17, so that the head portion 1 can be held floating at an arbitrary height position on the drawing board.

Further, since the head portion 1 is rigidly supported by the slide block 11 which is locked by the screw member 17, the supported state thereof becomes stable.

Therefore, even if the head section 1 suddenly falls, the head section 1 can be reliably kept floating.

In addition, the force acting perpendicularly to the drawing board surface of the head section 1 changes depending on the change in the inclination angle of the drawing board, but the supporting force that supports the head section 1 (rotational moment of the head section 1) also changes. Since it changes according to the inclination of the plate, the head section 1 can be held at any desired height position with a constant flying height.

In addition, since the head portion 1 can be supported by the rotational moment generated by the load of the head portion 1, the head portion 1
Regardless of the weight of the head, for example, even if the head is replaced with a head of a different equipment, no adjustment or other work is required.

In order to release the supported state of the head part 1, the head part 1 is rotated counterclockwise in FIG. The opening/closing hinge member 5 slides diagonally upward to the left and away from the head 17a of the screw member 17.
The head 1 returns to the horizontal position as shown in FIG. 1, and the head 1 can also come into close contact with the drawing board.

In this way, according to the present invention, the amount of rotation of the opening/closing hinge member (
Regardless of the height position of the rotation fulcrum shaft on the head side, the slide block slides due to changes in the amount of relative rotation between the opening/closing hinge member and the head, and the end face of the block comes into contact with the stopper. can be held floating at any height position on the drawing board.

Therefore, the floating operation of the head portion becomes easy, and the workability of drafting work is improved.

Furthermore, according to the present invention, the supporting force for supporting the head (rotational moment of the head) also changes according to the inclination of the drawing board, so that the surface of the drawing board of the head changes in relation to the change in the inclination angle of the drawing board. The head portion can be held at any height position with a constant flying height regardless of changes in the vertical force acting on the head portion.

Furthermore, according to the present invention, the head portion is rigidly supported by the slide block locked by the stopper, so that the supported state is stable.

Therefore, even if the head part suddenly falls, the head part can be reliably supported by floating.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of the head support device of the present invention showing a state in which the head support device is not operating, that is, a state in which the head is in close contact with the drawing board, and FIG. 2 is a partially cutaway view of the head support device of the present invention. FIG. 2 is a partially cutaway view of the head support device showing a state in which the support device is in operation, that is, a state in which the head is at rest at a position floating above the drawing board. A... Head part support device, 1... Head part, 5...
・Opening/closing hinge member, 6... Connection bracket, 7...
- Rotating hinge member, 8... Pinion gear, 9... Rotating fulcrum shaft, 10... Rack, 11... Slide block, 14... End face of slide block, 15...
Rotation fulcrum shaft, 17...screw member, 18...vertical carriage.

Claims (1)

[Claims] 1 An opening/closing mechanism arranged between a connecting bracket rigidly connected to the vertical carriage and a pivoting hinge member rigidly connected to the head against vertical movement of the head with respect to the drawing board. Rotation fulcrum shafts are provided on the head portion side and the vertical carriage side of the hinge member, and the opening/closing hinge member, the connecting bracket, and the rotation hinge member are pivotally connected at these rotation fulcrum shafts, while the head portion A pinion gear rotatable about a rotation fulcrum shaft on the side is fixed to the rotation hinge member, and a pinion gear is attached to the opening/closing hinge member so as to slide between the head side and the vertical carriage side with respect to the hinge member. A rack that engages with the pinion gear is provided on the head side of the slide block disposed on the slide block, and a stopper is provided on the connection bracket that comes into contact with an end surface of the slide block to prevent the slide block from sliding toward the vertical carriage. The head section can be floated at any height position above the drawing board by stopping the slide block sliding toward the vertical carriage side by the rotation of the head section in the floating direction with the stopper. A head support device for a track-type drafting machine, characterized in that the head support device is configured to support the head.