JPS5947678B2 - Rail type head support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention (c) relates to a rail-type head support device equipped with a balance weight, that is, a rail-type flexible parallel ruler/coordinate analyzer. It is characterized in that it cannot be separated or separated.

In this type of device, the weight of the balance weight is balanced with the total weight of the head and the vertical cursor.

Therefore, if the head is not connected to the vertical cursor and the balance is lost and the vertical rail is in an inclined state, the balance weight will be in a state of self-propelled along the vertical rail.

Therefore, when assembling the device, the balance weight is generally fixed to the vertical rail, but if it is accidentally released, the balance weight will move inside the vertical rail due to its own weight due to the inclination of the vertical rail. , the vertical cursor that is linked to the balance weight will move rapidly, and there is a risk that the hand of the assembly worker will hit it, and the balance weight may collide with the end of the vertical rail. hand,
There was a risk that the vertical rails would be destroyed.

Also, when using this device, if you remove the head from the vertical cursor side, you can use more space on the drawing board, but it is best to fix the vertical cursor etc. to the vertical rail with the drawing board tilted upright. If the head was removed without doing so, there was a risk that the balance weight would move on its own and the vertical cursor would move rapidly.

An object of the present invention is to provide a rail type head support device that eliminates the above-mentioned defects.

The configuration of the present invention will be described in detail below with reference to an embodiment of a rail type universal parallel ruler.

In FIG. 1, 1 is a drawing board, and a support stand (not shown)
It is fixed to the drawing board holder.

The support base has an angle adjustment device, and by operating the device, the drawing board 1 can be set at a desired angle between a horizontal position and a vertical position.

Reference numeral 2 denotes a horizontal rail fixed to the side of the drawing board 1, on which a horizontal cursor 3 is slidably attached, and one end of a vertical rail 4 is connected to the horizontal cursor 3.

The other end of the vertical rail 4 is connected to the drawing board 1 via the tail roller 5.
is placed on top.

- 6 is a balance weight disposed so as to be freely movable within the weight insertion space 7 formed along the longitudinal direction of the vertical seal 4; 8 is slidably attached to the vertical rail 4 via rollers 9; The cursor 8 is a vertical cursor, and the cursor 8 is connected to the balance weight 6 via a wire rope 10 in order to work in conjunction with the balance weight 6.

The wire rope 10 is hung on pulleys 11 and 12 rotatably disposed at both ends of the vertical rail 4.

The vertical cursor 8 and balance weight 6 are connected to the vertical rail 4
They move in opposite directions along the .

A swing arm 13 is pivotally supported on the vertical cursor 8 so as to be rotatable about an axis 14, and a brake shoe 15 is provided at one end of the swing arm. It faces the side surface of the rail portion 16 formed in the direction.

Reference numeral 17 denotes a fixed operation lever rotatably supported by the vertical cursor 8, on which a cam 18 and a protrusion 19 are formed.The cam surface of the cam 18, which consists of a pressing surface a and a releasing surface, The other swinging arm 13 is opposed to the swinging arm 13.

Reference numeral 20 denotes a support member, on which projecting pieces 21 and 22 are formed substantially parallel to each other, and a recessed portion 23 is formed in the projecting piece 21.

The support member 20 is attached to the screw 24.2 with the protrusion 21.22 inserted into the protrusion 8a of the vertical cursor 8.
5, so that it can be removably fixed to the protrusions 26, 27 of the vertical cursor 8.

28, the − side portion is on both upper side portions of the support member 20;
A connecting member rotatably connected via pivot shafts 29 and 30, and a head 31 on the other side of the connecting member 28.
Both sides of the support member 32 are rotatably connected by pivot shafts 33,34.

In the figure, 35 is a spring, and 36 and 37 are stoppers.

Next, the operation of this embodiment will be explained.

When the lever 17 is in the position shown in FIG.
The pressing surface a of 8 presses one side of the swinging piece 13, and this pressing force causes the brake shoe 15 to come into pressure contact with the side surface of the rail portion 16, and the vertical cursor 8 is fixed to the vertical rail 4 (it may be in a semi-fixed state). ) has been done.

Therefore, the swing arm 13, the cam 18, and the lever 17 constitute means for applying a restraining force to the movement of the vertical cursor or the like.

It is now assumed that the head 31 is connected to the vertical cursor 8 by means of the support member 20 and screws 24.25 for removably connecting the head to the vertical cursor.

In this state, when the lever 17 is manually swung in the direction F around the support shaft until it is locked by a stopper (not shown), the release surface of the cam 18 and one side of the swing arm 13 The contact 1 brake shoe 15 is the spring 35
Due to the tensile elasticity of the vertical cursor 8, the vertical cursor 8 is released from being fixed to the vertical rail 4 by swinging around the shaft 14.

At the same time, one end of the protrusion 19 moves into the recess 23.

In this state, remove the screws 24 and 25 and remove the support member 20.
When attempting to move the supporting member 20 to the right in the figure, the curved surface 23a of the recessed portion 23 is engaged with the protrusion 19 of the lever 17, and the rightward movement of the support member 20 is prevented.

Next, when the lever 17 is swung in the opposite direction about the support shaft and the brake shoe 15 is pressed against the side surface of the rail portion 16, the protrusion 19 separates from the inside of the recess 23 and engages the curved surface 23a of the recess 23. , the engagement state with the protrusion 19 is released.

That is, the swing arm 13, the cam 18, the protrusion 19, the support member 20
The configuration of the recessed portion 23 constitutes means for preventing the head from being separated from the vertical cursor unless a restraining force is applied to the vertical cursor.

The stopping force may be directly applied to the balance weight 6, or a brake device for the vertical cursor 8 may be provided separately from the above structure.

In addition, means for removably connecting a head to the vertical cursor, means for applying a restraining force to the movement of the vertical cursor, etc., and means for applying a restraining force to the vertical cursor (which may be applied to a balance weight), etc. The configuration of the means for preventing the head from being separated from the vertical cursor unless it is provided is not particularly limited to the illustrated configuration.

Note that the means for making it impossible to separate the head from the vertical cursor can also be achieved by making it impossible to perform a separation operation.

Since the present invention is constructed as described above, when the vertical rail is inclined, the vertical cursor etc. can be fixed to the vertical rail (
Even if you accidentally try to separate the head from the vertical cursor without fixing it (including semi-fixed state), you will not be able to separate it unless the vertical cursor etc. is fixed to the vertical rail, so avoid the danger mentioned at the beginning. There are benefits that can be removed and the safety of this type of device can be increased.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of the present invention, in which FIG. 1 is a schematic plan view of the whole, FIG. 2 is a plan view of the main part, and FIG. 3 is a sectional view thereof. 1...Drawing board, 2...Horizontal rail, 3...
...Horizontal cursor, 4...Vertical rail, 6...
... Balance weight, 8 ... Vertical cursor, 9 ... Roll, 10 ... Wire loaf, 13 ... Swinging arm, 15 ... ...Brake shoe, 16...Rail part, 17...
Fixed operation lever, 18...Cam, 19...
...Protrusion, 20...Supporting member, 21.22...
... Protruding piece, 23 ... Recessed part, 24.25.
...LA28...Connecting member, 31...
...Head, 32...Support member.

Claims (1)

[Claims] 1. A horizontal rail, a vertical rail movably connected to the horizontal rail at right angles to the horizontal rail, a vertical cursor attached to the vertical rail so as to be movable along it, and movement of the vertical cursor. a balance weight connected to the vertical cursor by a rope or the like and movably disposed along the vertical rail to move in the opposite direction to the vertical cursor; and means for removably connecting a head to the vertical cursor; The apparatus comprises means for applying a restraining force to the movement of the vertical cursor, etc., and means for preventing the head from being separated from the vertical cursor unless a restraining force is applied to the vertical cursor, etc. A rail type head support device featuring: