JPH0662038B2 - Balance device for moving objects in drafting machines, digitizers, etc. - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to the self-weight of a moving body that moves a scale, a drawing tool, a coordinate reading tool, etc. along an inclined guide rail in a drafting machine, a drawing machine, a digitizer, etc. The present invention relates to a balance device for a moving body, which is capable of lightening movement.

2. Description of the Related Art As a conventional technique, a guide rail of a balance weight is installed in parallel with a guide rail of a moving body, and the moving body and the balance weight are connected by a rope via a pulley so that the weights of the moving body and the balance weight are offset from each other. It is known to do so.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Therefore, in the prior art, there is a problem in that a guide rail for a balance weight is required in addition to the guide rail of the moving body, and the structure of the guide rail becomes large. The guide rail has a problem that it increases the weight of the device, and when the inclination of the guide rail approaches horizontal, the balance weight doubles the own weight of the moving body, and the existence thereof makes the moving body operate smoothly. There was a damaging problem.

Therefore, according to the present invention, a guide rail that guides a moving body such as a scale or a digitizer is provided with a first rotating member that rotates as the moving body moves, and a second rotating member. Is provided with a tension spring member whose tension elastic force increases and decreases as the amount of rotation increases and decreases, and a torque conversion means for equalizing the spring elasticity of the tension spring member is provided between the first and second rotating members. In a balancing device for a moving body in a drafting machine, digitizer, etc., the torque conversion means is provided between the first and second rotating members, and a ratio of mutual rotating diameters accompanying rotation is a tensile elastic force of the tension member. A balance device for a moving body in a drafting machine, digitizer, etc., characterized by comprising first and second torque conversion pulleys interlocked by a rope wound so as to change in proportion to the increase and decrease of It is what

Further, according to the present invention, a guide rail that guides a moving body such as a scale or a digitizer is provided with a first rotating member that rotates as the moving body moves, and a second rotating member increases or decreases as the amount of rotation increases or decreases. A tension spring member that increases or decreases the tensile elasticity is provided, and a torque conversion unit that equalizes the spring elasticity of the tension spring member is provided between the first and second rotating members. Movement in a drafting machine, digitizer, or the like. In a body balancing apparatus, one end side of the tension spring member is made to act on a second rotating member, and the other end side is fixed to a spring case rotatably positioned on a side wall portion of a guide rail, and the spring case is rotationally positioned. An object of the present invention is to provide a balancer for a moving body in a drafting machine, digitizer, etc., characterized in that the spring resilience of the tension spring member is adjustable by adjustment.

Effect According to the balancer device for a moving body in the drafting machine, digitizer, etc. according to the present invention having the above-mentioned configuration, when the moving body is moved along the guide rail for guiding the moving body such as the scale and the digitizer, the moving body moves. As a result, the first and second rotating members rotate, and the tensile elastic force of the tension spring member provided on the second rotating member increases or decreases as the amount of rotation of the rotating member increases or decreases. Since the spring resilience of the tension spring member is equalized by the torque converting means provided between the first and second rotating members, the moving body first moves the tension spring member at an arbitrary position on the guide rail. If balanced so as to be suspended by spring elasticity, the balanced state will be maintained even if the moving body is freely moved to any position.

That is, according to the torque converting means of the present invention as set forth in claim 1, the torque converting means is wound between the first and second rotating members such that the mutual rotating diameters change with rotation. Let R1 and R2 be the rotation diameters of the first and second torque conversion pulleys that are interlocked by the ropes that are hung, the torque of the first rotating member by the moving body is T1, and the torque of the tension spring member is T2.
Then, if the tension of the rope between the first and second torque conversion pulleys is F, then F = T1 / R1 = RT.
Since it is 2 / R2, T2 = (R2 / R1) × T1. Since T1 is a constant torque due to the tensile force of the moving body, the tensile force T2 of the tension spring member increases or decreases as the moving body moves. If the ratio of R2 / R1 of the radius of gyration of the torque conversion pulley with which the rope engages is made variable in proportion to, the spring resilience of the tension spring member becomes equal to that of the rotation amount of the first and second rotation members. It is possible to equalize the increase and decrease.

According to the balance device of the present invention as set forth in claim 2, the spring elasticity of the tension spring member is adjusted by rotationally adjusting the spring case provided on the side wall of the guide rail so as to be rotationally positionable. Since it can be freely adjusted, the tension torque by the moving body increases as the inclination of the drawing plate becomes closer to vertical, and the torque by the moving body decreases as the inclination of the drawing plate becomes closer to horizontal. The strength of elasticity can be easily adjusted.

EXAMPLE The apparatus of the present invention will be described in detail below with reference to the example shown in FIG. 1. In FIG. 1, 1 is a sloping drawing board, 2 is a horizontal rail fixed along its upper edge, and 3 is a horizontal rail 2. Is a vertical rail whose upper end is connected to a horizontal moving body which moves in the left-right direction along the vertical guide for vertically moving the moving body which translates a scale or the like on the drawing board. Are connected to each other by a joint box 4, and these structures are conventionally known in a drafting machine or the like. 5
Is a mounting frame portion of the torque converting means provided on the upper end portion of the vertical rail 3 in a structure integrated with the joint box 4, and the first rotating member 6 is provided rotatably integrally with the supporting shaft 7. In the case of the embodiment, the wire 8 is wound around the rotating member 6,
It is provided so as to rotate with the movement of a moving body (not shown in the figure) connected to the end 8a of the wire 8. Also, the support shaft 7
Is provided with one conical torque conversion pulley 9 forming the torque conversion means, and the rope 12 is rotated so as to rotate relative to the other conical torque conversion pulley 11 provided on the second rotating member 10. It is connected with. The rope 12 has one end portion 12a fixed to the large radius portion of the second torque conversion pulley 12 and is sequentially wound toward the small radius portion to be wound from the minimum radius portion to the large radius of the opposing first torque conversion pulley 9. The other end 12b is fixed by passing it to the section. The second rotating member 10 is provided so as to project laterally from the mounting frame portion 5, and a tension spring member 13 is provided at the projecting portion. The tension spring member 13 is
It consists of a spring and its outer spring piece is the spring case 14.
The inner spring piece is fixed to the rotating member 10, and is provided so as to apply tensile elasticity to the load in the pulling direction of the wire 8. In the case of the embodiment, the ratchet type taper claws 15 are provided on the outer side of the spring case 14 along the circumference of rotation about the rotary member 10 at predetermined intervals, while the taper claws 15 project in the rotation range. The pins 16 to which the elastic force of the spring 17 in the direction is provided are provided opposite to each other, and by rotating and fixing the spring case 14 in a predetermined direction, the strength of the spring elastic force of the tension spring member 13 can be variably adjusted. Configured. Reference numeral 18 is an operation lever of the pin 16.

In the above configuration, when the spring case 14 is rotated in a predetermined direction, the tension spring member 13 in which only the outer spring piece is fixed to the spring case 14 stores the tension spring elastic force corresponding to the rotation of the case 14 to rotate the rotary member 10. Is pulled in the winding direction, and the load of the moving body applied to the wire 8 can be set in a balanced state. Therefore, when the moving body is moved downward in the first illustrated state, for example, the first torque conversion pulley 9 rotates with the rotation of the first rotating member 6, and the rope 12 causes the second torque converting pulley 9 to rotate. Torque conversion pulley 11
Rotates with the second rotating member 10 and the tension spring member 13
Is pulled in the winding direction, and the spring resilience is increased corresponding to the pulling distance. At this time, when the movement of the moving body is started, the winding diameter of the first torque conversion pulley 9 is the maximum and the rewind diameter of the second torque conversion pulley 11 is the minimum. Is in the maximum state, but the pulley 9
Since the winding diameter of the wire decreases and the winding diameter of the pulley 11 increases, the torque in the pulling direction of the wire 8 decreases in proportion to the winding diameter of the rope 12 of both pulleys 9 and 11. Become. Therefore, the torque that decreases in accordance with the change in the ratio of the tension spring elasticity that increases with the pulling out of the wire 8 of the tension spring member 13 and the rope winding and rewinding diameter of the first and second torque conversion pulleys 9 and 11. If the values are set correspondingly, the tension spring elastic force of the tension spring member 13 with respect to the wire 8 can be maintained within a predetermined balance range without rapidly increasing or decreasing.

In the illustrated embodiment, the first and second torque conversion pulleys 9 and 11 are each shown in a conical shape for easy understanding, but the tension elastic force of the tension spring member 13 is wound according to the change rate. The unwinding diameter can be freely set, and of course, a conventionally known booster mechanism for changing the transmissibility in the transmission mechanism of the tension spring elasticity of the tension spring member 13 from the first rotating member 6 of the wire 8, It is also possible to interpose a reduction mechanism and a clutch mechanism.

As described above, according to the balancer device for a moving body in the drafting machine, digitizer, etc. according to the present invention, the guide rail for guiding the moving body such as the scale, the digitizer, etc., is rotated by the first moving body. While providing the rotating member, the second rotating member is provided with a tension spring member whose tensile elasticity increases and decreases as the amount of rotation increases and decreases, and between the first and second rotating members,
In a balancer for a moving body in a drafting machine, digitizer or the like, which is provided with a torque converting means for equalizing the spring elasticity of the tension spring member, the torque converting means is the first device.
And a first rotating member provided between the second rotating member and interlocked with each other by a rope wound so that a ratio of mutual rotating diameters in accordance with the rotation changes in proportion to an increase or decrease in tensile elasticity of the tensile member. Since it has a configuration including two torque conversion pulleys, when the moving body is moved along a guide rail that guides the moving body such as a scale and a digitizer, the first moving body moves along with the movement of the moving body.
The second rotating member rotates, and the tensile elastic force of the tension spring member provided on the second rotating member increases / decreases as the amount of rotation of the rotating member increases / decreases. Second
Since the spring elastic force of the tension spring member is equalized by the torque converting means provided between the rotating members, first, the moving body is suspended by the spring elastic force of the tension spring member at an arbitrary position of the guide rail. If balanced, it has the effect of maintaining a balanced state even if the moving body is freely moved to any position, and by means of a wrapped rope provided between the first and second rotating members. By configuring the ratio of the rotation diameters of the interlocking first and second torque conversion pulleys so as to change in proportion to the increase or decrease in the tensile elasticity of the tension member,
There is an effect of providing a torque converting means corresponding to a tension spring member having various tensile elasticity characteristics.

Further, according to the present invention, the strength of the spring resilience of the tension spring member can be freely adjusted by adjusting the rotational positioning of the spring case that is rotatably positioned on the side wall of the guide rail. The tension torque by the moving body is maximized as the inclination of is closer to vertical, and the tensile torque by the moving body is reduced to near zero as the inclination of the drawing board is closer to horizontal. ,
The strength can be easily adjusted simply by rotating the spring case provided on the side wall of the guide rail, and the drawing work can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a partially cross-sectional plan view showing an essential part of an embodiment of the device of the present invention, FIG. 2 is a partially longitudinal side view thereof, and FIG. 3 is a schematic rear view thereof. 3 ... Vertical rail 4 ... Joint box 5 ... Torque converting means mounting frame 6 ... First rotating member 8 ... Wire interlocking with moving body 9 ... Torque converting pulley 10 serving as torque converting means Second rotating member 11 ... Torque converting pulley 12 serving as torque converting means 12 ... Rope serving as torque converting means 13 ... Tension spring member 14 ... Case of tension spring member 15 ... Tapered pawl 16 ... Pin

Claims (6)

[Claims] 1. A guide rail for guiding a moving body such as a scale or a digitizer is provided with a first rotating member that rotates with the movement of the moving body, and a second rotating member is provided with an increase or decrease in the amount of rotation. A moving body in a drafting machine, digitizer, etc., which is provided with a tension spring member for increasing and decreasing the tension elastic force, and a torque converting means for equalizing the spring elasticity of the tension spring member is provided between the first and second rotating members. In the balance device, the torque conversion means is provided between the first and second rotating members, and the ratio of the mutual rotation diameters changes in proportion to the increase and decrease of the tensile elastic force of the tension member with the rotation. A balance device for a moving body in a drafting machine, a digitizer, etc., characterized by comprising first and second torque conversion pulleys that are interlocked with each other by the rope wound around as described above. 2. A balance device for a moving body in a drafting machine, digitizer or the like according to claim 1, wherein the tension spring member is a spring spring member. 3. A drafting machine according to claim 1 or 2, wherein the first and second rotating members are configured to interlock with a balance weight of the moving body. A balance device for moving objects in digitizers. 4. A guide rail for guiding a moving body such as a scale or a digitizer is provided with a first rotating member that rotates with the movement of the moving body, and a second rotating member is provided with the increase or decrease in the amount of rotation. A moving body in a drafting machine, digitizer, etc., which is provided with a tension spring member for increasing or decreasing the tension elastic force, and a torque converting means for equalizing the spring elasticity of the tension spring member is provided between the first and second rotating members. Balance device, one end side of the tension spring member is made to act on the second rotating member, and the other end side is fixed to a spring case rotatably positioned on the side wall portion of the guide rail, and the spring case is rotationally positioned and adjusted. A balance device for a moving body in a drafting machine, digitizer, etc., characterized in that the spring resilience of the tension spring member is adjustable. 5. A balancing device for a moving body in a drafting machine, digitizer or the like according to claim 4, wherein the tension spring member is a spring spring member. 6. The drafting machine according to claim 4 or 5, wherein the first and second rotating members are configured to interlock with a balance weight of the moving body. A balance device for moving objects in digitizers.