JPH0232999B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a rail-type flexible parallel ruler or a rail-type coordinate analyzer that prevents the balance weight and cursor from falling suddenly along the vertical rail when the rope connecting the balance weight and the cursor is cut. Regarding safety equipment.
As shown in FIGS. 1 and 2, the vertical cursor 2 and balance weight 4 of the rail type flexible parallel ruler are connected to a wire rope 1 that is stretched between rope pulleys 6 and 8 that are rotatably provided at both ends of a vertical rail 5.
Connected by 0. The vertical cursor 2 and the balance weight 4 are moved in opposite directions along the vertical rail 5 by the rope 10. Therefore, drawing board 1
When drawing with cursor 2 perpendicular to the floor, even if you release the brake of vertical cursor 2,
The force of gravity that causes the vertical cursor 2 to fall along the vertical rail 5 and the force that causes the vertical cursor 2 to rise along the vertical rail 5 due to the weight of the balance weight 4 are exactly balanced, so the vertical The cursor 2 and the head 14 connected thereto do not fall suddenly and are held at a stationary position, and the head 14 can be moved vertically along the surface of the drawing board 12 with a light force. However, if the wire rope 10 breaks due to fatigue or the like, the vertical cursor 2 head 14, balance weight 4, etc. will fall suddenly along the vertical rail 5, and will crash into the end side of the vertical rail 5. As a result, there is a risk that the vertical cursor 2, balance weight 4, and other various mechanical parts may be damaged, or that people may be injured if their hands or the like come into contact with the rapidly falling head 14.

The present invention aims to eliminate the above-mentioned defects.

The configuration of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

In Figures 1 to 5, 12 is a drawing board;
It is supported on a drafting table (not shown) so that a desired inclination angle can be set between a state substantially perpendicular to the floor surface and a state horizontally. 16 is a horizontal rail fixed to the drawing board 12, and a horizontal cursor 18 is placed on this rail.
are movably connected via rollers. 5 is a vertical rail, the upper end of which is the horizontal cursor 18
The lower end is connected to the drawing board 12 via the tail roller 20.
placed on the surface. 22 is a weight insertion space formed over the entire length in the longitudinal direction of the vertical rail 5, and the balance weight 4 is slidably placed on the bottom surface of this space via rollers 24. 2 is the vertical cursor, and the columns 26, 28, 3 are
0, 32 are rotatably supported, and the rollers 26, 2
8, 30, 32 are rail parts 34, 3 of the vertical rail 5
It is rotatably fitted into V grooves 38 and 40 formed in 6. Reference numeral 14 denotes a head connected to the vertical cursor 2 via a hinge connection member, and straightedges 44 and 46 are removably fixed to the mounting plate of this head.

Next, the brake mechanism for the vertical cursor 2 and balance weight 4 will be explained with reference to FIGS. 3 and 4.

48 has a vertical cursor 2 in the center that can be rotated freely on axis 5.
The brake shoe 52 is fixed to one end of the L-shaped member supported by the shaft, and one end of a rope-like member 10a made of wire rope is connected to the other end by a screw 54. Reference numeral 56 is an L-shaped member whose central portion is rotatably supported by a shaft 58 on the balance weight 4. A brake shoe 60 is fixed to one end of the L-shaped member, and the other end of the rope-like member 10a is connected to a screw 62.
are connected by. The rope-like member 10a is stretched around a rope pulley 6 rotatably supported on the upper end of the vertical rail 5. 10b is vertical rail 5
It is a rope-like member that is hung on a rope pulley 8 that is rotatably supported at the lower end of the rope. They are connected together. Appropriate tension is applied to the rope-like members 10a, 10b, and the tension causes the side surfaces of the L-shaped members 48, 56 to abut against the stopper shafts 68, 70. L-shaped member 4
In a state where the side surfaces of the brake shoes 8 and 56 are in contact with the stopper shafts 68 and 70 by the tension of the rope-like members 10a and 10b, the brake shoes 52 and 6
0 faces the inner wall surface of the rail portion 44 of the vertical rail 5 and the side wall surface 72 of the space portion 22 with a slight gap therebetween. In other words, the brakes are in an unprecedented state. Denoted at 74 and 76 are brake springs, which urge the L-shaped members 48 and 56 about the shafts 50 and 58 in the direction of rotation of the upper hour hand in FIGS. 3 and 4. The biasing force of the springs 74, 76 applied to the members 48, 56 is set to be slightly weaker than the tension force of the rope-like members 10a, 10b. Therefore, the rope-like members 10a, 10b of the members 48, 56
When the tension of member 4 is applied,
The side surfaces of 8 and 56 do not separate from the stopper shafts 68 and 70 due to the tensile force of the springs 74 and 76. The total weight of the vertical cursor 2, head 14, straightedges 44, 46, etc. and the weight of the balance weight 4 are set to be exactly the same. 78 is a stopper member fixed to the vertical cursor 2; 80 is a swinging arm rotatably supported by a shaft 82; a brake shoe 84 is fixed to the tip of this arm; It faces the side surface of the rail portion 36 of the cursor 2. 86 is the arm 8
This is a brake lever that is rotatably supported on the brake lever 0, and an eccentric cam 88 is provided at the tip of the brake lever, and the cam 88 is brought into contact with the stopper member 78 by the elasticity of a spring (not shown). There is.

Next, the operation of this embodiment will be explained.

When the brake lever 86 of the vertical cursor 2 is tilted in the brake release direction and the brake (not shown) of the horizontal cursor 18 is released, the head 14
When you grasp the handle with your hand and apply force in any direction along the surface of the drawing board 12, the horizontal cursor 18 moves along the horizontal rail 16, the vertical cursor 2 moves along the vertical rail 5, The head 14 can be moved to any position on the drawing board 12. When the vertical cursor 2 moves along the vertical rail 5, the balance weight 4 moves along the vertical rail 5 in the opposite direction to the vertical cursor 2. When the drawing board 12 is vertically erected and you let go of the head 14, the vertical cursor 2 tries to fall downward along the vertical rail 5, but this falling force and the balance weight 4 The force trying to fall downward along 5 is exactly balanced, and the head 14 is
Stop at the desired position on 2. Therefore, head 1
Even if the drawing head 4 is heavy, the drawing person can move the head 14 vertically along the surface of the drawing board 12 with light force. In the above-described configuration, when the rope-like member 10a is broken due to wear or the like, the tension of the rope-like member 10a with respect to the L-shaped members 48, 56 is released. At this time, the L-shaped member 4
The brake shoes 8 and 56 rotate rapidly around the shafts 50 and 58 in the direction of rotation of the hour hand due to the elasticity of the springs 74 and 76, and the brake shoes 52 and 60 are pressed against the side surface of the rail portion 44 and the wall surface 72 of the space portion 22. , vertical cursor 2 and balance weight 4, rope-like member 1
The brake is applied at the same time as 0a or 10b is cut.
This brake prevents the vertical cursor 2 and the balance weight 4 from falling suddenly along the vertical rail 5, and also allows the drawing person to know if the rope-shaped member 10a or 10b has been cut. Incidentally, the L-shaped member may be of a double type as shown in FIG.

Next, another embodiment of the brake mechanism will be described with reference to FIG.

Reference numerals 90 and 92 are links whose central portions are rotatably supported by the vertical cursor 94;
2 are rotatably and slidably connected by a shaft 96. A rope-like member 98 is connected to the shaft 96, and the tension of the rope-like member 98 causes the links 90, 92 to come into elastic contact with stopper shafts 198, 100 protruding from the vertical cursor 94.
102 is a spring that biases the link 90 in the direction of rotation of the hour hand about the shaft 104; 106 is a spring that biases the link 92 in the direction of rotation of the hour hand counterclockwise about the shaft 108; The tensile elasticity is set to be weaker than the tension of the rope-like members 98, 98a. Reference numeral 110 denotes a T-shaped member supported by guides 112 and 114 so as to be slidable in a linear direction, and links 116 are provided at both ends of the transverse rod portion of the member 110 and at the ends of the links 90 and 92. , 118 are pivoted at both ends. Reference numeral 120 designates a swinging arm rotatably supported by a shaft 122 on the vertical cursor 94, and a brake shoe 124 is fixedly attached to the protrusion of the arm 120. They face each other with a gap between them. The inclined surface 126 formed at the tip of the swinging arm 120 is tilted toward the T-shaped member 110 by the elasticity of the coil spring 128.
It is in elastic contact with an inclined surface 130 formed at the end of. The above-mentioned brake mechanism is also provided on the balance weight side. In the above-described structure, when the rope-like member 98 is broken, the links 90, 92 are moved to the eighth position around the shafts 104, 108 by the tensile force of the springs 102, 106. The T-shaped member 110 swings as shown in the figure, thereby moving the T-shaped member 110 upward. Member 11
0 moves upward, the inclined surfaces 130 and 126
The contact state with the shaft 12 is released, and the swinging arm 120
2 in the direction of rotation of the hour hand, the brake shoe 124 comes into pressure contact with the wall surface of the vertical rail, and the vertical cursor 94 is braked. Similarly, the balance weight is also braked at the same time as the rope-like member 98 is cut. In carrying out the present invention, various structures of the above-mentioned brake mechanism are conceivable, so as long as the brake is applied to the cursor and weight when the rope is cut, it is possible to use a structure using a solenoid or the embodiment shown in the drawings. It is not limited. Further, the present invention can be used for other types of rail-type flexible parallel rulers and rail-type coordinate analyzers in addition to the rail-type flexible parallel ruler shown in the drawings.

Since the present invention is configured as described above, it has the effect of being able to prevent the vertical cursor and balance weight from falling suddenly along the vertical rail when the rope-like member connecting the vertical cursor and balance weight is cut.

[Brief explanation of drawings]

Figure 1 is an overall front view, Figure 2 is an explanatory diagram showing the relationship between the vertical cursor and balance weight, Figure 3 is a front view of the vertical cursor, Figure 4 is a front view of the balance weight, and Figure 5 is the vertical rail. 6 is an explanatory diagram showing another embodiment of the brake device, FIG. 7 is an explanatory diagram showing another embodiment of the brake device, and FIG. 8 is an explanatory diagram of the same operation. 2... Vertical cursor, 4... Balance weight,
5... Vertical rail, 6, 8... Rope pulley, 1
0, 10a, 10b... rope-like member, 12...
Drawing board, 14...Head, 16...Horizontal rail, 18
... Horizontal cursor, 22 ... Weight insertion space,
34, 36...Rail part, 42...Head, 48
... L-shaped member, 50 ... shaft, 52 ... brake shoe, 56 ... L-shaped member, 60 ... brake shoe, 68, 70 ... stopper shaft, 72 ... side wall surface, 78 ... stopper member, 80...Swinging arm,
84... Brake shoe, 86... Brake lever, 90, 92... Link, 94... Vertical cursor, 198, 100... Stopper axis, 102...
... Spring, 104 ... Shaft, 106 ... Spring, 108 ... Shaft, 110 ... T-shaped member, 1
12, 114... Guide, 116, 118... Link, 120... Rocking arm, 124... Brake shoe.

Claims (1)

[Claims] 1. A drawing board 12 that is supported in a tilted direction with respect to the floor surface, a vertical rail 5 disposed on the drawing board 12, and a vertical cursor 2 movably attached to the vertical rail 5. , 94 and the vertical rail 5
Balance weight 4 movably attached to
and the balance weight 4 and vertical cursor 2,94
rope-like members 10a, 10b, 98, 98a that connect the two so that they interlock in opposite directions;
and a brake mechanism that simultaneously applies braking force to the vertical cursors 2, 94 and the balance weight 4 when the rope-like members 10a, 98 break. Safety device for analysis machine.