JP2797638B2 - Carriage moving device and automatic processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a carriage moving device, for example, an automatic drawing device equipped with a carriage moving device, a plate making register mark automatic drawing device, and a coordinate reading device. And automatic processing devices such as cutting devices.

(Prior Art) In recent years, by moving a carriage guided reciprocally by a guide means via a carriage moving device, processing means such as a pen, a sensor, and a cutter are moved to perform processing on an object to be processed. Various automatic processing devices have been put to practical use.

Conventionally, in an automatic processing apparatus of this type, a carriage moving apparatus for reciprocating a carriage has a smaller influence of elongation than a carriage moving apparatus using a toothed belt or the like, and a rack moving apparatus can perform a stable moving operation. And a carriage moving means using a pinion.

However, the rack and pinion type has problems such as loud noise, high cost, and inability to increase the traveling speed too much.

Therefore, recently, as a solution to these problems, a metal flat belt, a so-called steel belt, is stretched so as to travel along the moving path of the carriage, and the movement of the steel belt during traveling is controlled. A carriage moving device configured to transmit the light to the carriage via the connecting means has been developed and is being put to practical use.

The connecting means is configured to fix one end of a rigid connecting fitting to the steel belt and the other end to the carriage.

However, in such a conventional connection structure, when the guide means for guiding the carriage and the traveling line of the steel belt are not parallel, the mutual connection between the carriage and the steel belt is performed according to the inclination of the traveling direction. A force is generated in the direction of pulling or separating.

Then, the linear running accuracy of the carriage is deviated, or a side slip occurs between the steel belt and the pulley, causing a cumulative error.

In addition, due to the accuracy of parts and assembly errors, the guide means for guiding the carriage and the traveling line of the steel belt are not always completely parallel, and a slight deviation (about 0.1 mm at 1 m) always occurs. .

In general, efforts are made to reduce assembly errors as much as possible, but at present, it cannot be completely eliminated.

Also, the influence of expansion and contraction by heat (about 0.1 mm at 10 ° C.) causes unnecessary stress in the connecting portion in a direction perpendicular to the moving direction of the carriage, causing the same problem.

Such phenomena cannot be ignored in automatic processing devices such as automatic drawing devices, plate making register mark automatic drawing devices, coordinate reading devices, cutting devices, etc., which are required to have higher accuracy year by year.

(Problems to be Solved by the Invention) As described above, conventionally, in a carriage moving device using a traveling strip such as a steel belt, a structure is used in which the carriage and the traveling strip are connected by a rigid connection fitting. I have.

For this reason, if a force in the direction perpendicular to the moving direction of the carriage is generated between the running streak and the carriage due to the deviation of the parallelism between the members or the influence of heat, the force cannot be absorbed, and between them. Unnecessary stress is generated, thereby deteriorating the linear running accuracy of the carriage and causing the running strip to skid, causing a cumulative error.

Then, there is a serious problem that the movement accuracy of the carriage cannot be increased to a certain level or more.

In an automatic processing apparatus capable of performing processing on an object to be processed by moving a processing unit in accordance with the movement of a carriage, a conventional carriage moving apparatus has a carriage moving accuracy of a certain level or more. Because the movement accuracy cannot be increased to a certain level or higher, the processing such as recording, reading, and cutting that meets the needs of high accuracy cannot be performed. There was such a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. A first object of the present invention is to provide a carriage guided reciprocally by a guide means and a carriage extending along the movement path of the carriage. In the carriage moving device, which is connected to the traveling running body via the connecting means, and moves the carriage along with the running of the running running body, unnecessary stress is generated in a direction orthogonal to the moving direction of the carriage. An object of the present invention is to provide a carriage moving device that can prevent a decrease in movement accuracy and can move the carriage with high accuracy.

A second object is to move a carriage guided reciprocally by a guide means via a carriage moving device, and to move the processing means in accordance with the movement of the carriage, so that the object to be processed is moved. In an automatic processing apparatus capable of performing processing for the carriage, it is possible to prevent a decrease in movement accuracy due to generation of unnecessary stress in a direction orthogonal to the movement direction of the carriage, and to move the movement of the processing means that moves integrally with the carriage with high accuracy. It is an object of the present invention to provide an automatic processing apparatus which can perform the processing with high accuracy.

[Constitution of the Invention] (Means for Solving the Problems) According to the present invention, as a first means for achieving the first object, a carriage guided reciprocally by guide means and movement of the carriage are described. In a carriage moving device, which is connected to a running streak stretched so as to travel along a road via a connecting means, and moves the carriage as the running streak travels, A connecting member having one end connected to the running strip and the other end connected to the carriage, and having a large rigidity in a moving direction of the carriage and a small rigidity in a direction orthogonal to the moving direction of the carriage. It was done.

Further, as a second means for achieving the second object, a carriage guided reciprocally by a guide means is moved via a carriage moving device, and the processing means is moved according to the movement of the carriage. By letting
In an automatic processing apparatus capable of performing processing on an object to be processed, a running strip stretched so as to run the carriage moving device along guide means for guiding the carriage in a reciprocating manner, and A running member having one end connected to the running member and the other end connected to the carriage, and having high rigidity in the moving direction of the carriage and low rigidity in a direction orthogonal to the moving direction of the carriage; And a connecting means for transmitting the movement of the body during traveling to the carriage.

(Operation) That is, according to the first means, the movement of the running streak is transmitted to the carriage via the connecting means and moves integrally. Further, at this time, the connecting means connects one end to the running strip and connects the other end to the carriage, and has a large rigidity in the moving direction of the carriage and has a large rigidity in a direction orthogonal to the moving direction of the carriage. Due to the low rigidity of the connecting member, only the force in the running direction is transmitted between the running streak and the carriage, and the force in the direction perpendicular to the moving direction of the carriage due to misalignment or heat is generated by the elastic deformation of the connecting member. Can be absorbed. As a result, unnecessary stress does not occur between the running streak and the carriage as in the case of the conventional fixed connection, and it is possible to prevent a decrease in the movement accuracy due to the generation of the unnecessary stress, and to improve the accuracy. High carriage movement is possible.

Further, according to the second means, the movement of the running streak is transmitted to the carriage via the connecting means and moves integrally. Further, at this time, the connecting means connects one end to the running strip and connects the other end to the carriage, and has a large rigidity in the moving direction of the carriage and has a large rigidity in a direction orthogonal to the moving direction of the carriage. Due to the low rigidity of the connecting member, only the force in the running direction is transmitted between the running streak and the carriage, and the force in the direction perpendicular to the moving direction of the carriage due to misalignment or heat is generated by the elastic deformation of the connecting member. Can be absorbed. As a result, unlike the conventional fixed connection, unnecessary stress is not generated between the running streak and the carriage, and it is possible to prevent a decrease in the movement accuracy due to the generation of unnecessary stress. The movement accuracy of the processing means that moves together with the movement of the object is improved. As a result, highly accurate automatic processing of the workpiece can be performed.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

FIG. 2 shows an external view of an automatic drawing apparatus as an automatic processing apparatus. On the upper surface of the apparatus main body 1, a drawing table as a horizontal work table for mounting a drawing sheet 2 as a processing object. 3 are provided.

Further, on the upper surface side of the drawing table 3, a recording means, which is a processing means, for example, a pen 4 is provided. The pen 4 is moved in the front-rear direction (hereinafter, referred to as a Y direction) and the left-right direction (hereinafter, referred to as an X direction) by a pen moving unit 5 described later to draw a predetermined drawing on the drawing paper 2. I have.

An operation panel 6 is protruded from the front edge of the drawing table 3 so that various information necessary for drawing can be input as appropriate.

Reference numerals 7, 8, and 9 in the figure denote covers for covering the pen moving mechanism 5, the control device (not shown) and other attached devices so as not to be exposed to the outside, and have a disaster prevention effect, a noise prevention effect, a dust prevention effect, and a design. The effect is obtained.

Next, the configuration of the pen moving means 5 will be described with reference to FIGS.

As shown in FIG. 3, guide rails (hereinafter, referred to as Y-direction guide rails) 10a and 10b as first guide means are provided along both side edges of the drawing table 3.

These Y-direction guide rails 10a and 10b have first carriages (hereinafter referred to as Y-direction carriages) 11a and 11b.
b is reciprocally mounted.

In addition, the upper surface side of the moving path of the Y-direction carriages 11a and 11b,
That is, dust-proof belts (not shown) are stretched along the upper surface sides of the Y-direction guide rails 10a and 10b, respectively, so that adverse effects of dust can be prevented.

Further, Al guide rails (hereinafter referred to as X-direction guide rails) 12 as second guide means are provided on the Y-direction carriages 11a and 11b with both ends fixed.

The left Y-direction carriage 11b is mounted on the Y-direction guide rail 10b so as to be movable in a direction orthogonal to the length direction, and expands and contracts in the length direction due to heat of the X-direction guide rail 12. The movement of this part can absorb it.

A second carriage (hereinafter, referred to as an X-direction carriage) 13 is reciprocally mounted on the X-direction guide rail 12, and a pen holder 14 is attached to the X-direction carriage 13 as shown in FIG. The pen 4 is mounted via the.

The Y-direction carriages 11a and 11b are provided with a Y-direction carriage moving device 15 as first carriage moving means.
In addition, the X-direction carriage 13 is provided with an X-direction carriage moving device 16 as a second carriage moving means.
, Each is moved by a predetermined amount.

The Y-direction carriage moving device 15 has the following structure.

That is, stainless steel flat belts having a thickness of about 1 mm, so-called steel belts 17a and 17b, are stretched along the Y-direction guide rails 10a and 10b as running strips. These steel belts 17a, 17b are formed endless by connecting both ends thereof via a belt connecting plate 18.

Then, the right steel belt 17a is stretched in a horizontal state with the belt surface facing upward by being wound around a driving pulley 19a and a driven pulley 20a arranged at both ends of the Y-direction guide rail 10a. Further, the left steel belt 17b is stretched in a horizontal state with the belt surface facing upward by being wound around a driving pulley 19b and a driven pulley 20b arranged at both ends of the Y-direction guide rail 10b.

The drive pulleys 19a, 19b around which the steel belts 17a, 17b are wound have a shape having a crown R having a slightly larger diameter at a central portion in order to prevent meandering of the belt, and also prevent slippage. For this reason, the peripheral surface is coated with high friction material, and the drive pulleys 19a, 19
The driving force of b is transmitted to the steel belts 17a and 17b satisfactorily and reliably.

Also, as shown in FIG. 4, the right drive pulley 19a
Both ends 21a, 21b of the shaft 21 are supported by bearing members 23, 23 arranged side by side on a base 22, and a left drive pulley 19b (not shown) is also supported.

The drive pulleys 19a and 19b are connected to each other via a synchronous shaft 25 as shown in FIG. Further, the driving force of a motor 27 as a driving source is transmitted to the synchronous shaft 25 via a speed reduction mechanism 26 composed of a gear group.

Furthermore, the steel belt 17a on the right side and the Y-direction carriage 11a are connected by first connecting means 30 described later, and the steel belt 17b on the left side and the Y-direction carriage 11b are connected by second connecting means 31. ing.

Thus, the driving force of the motor 27 is transmitted to the synchronous shaft 25 via the speed reduction mechanism 26, and further transmitted to the driving pulleys 19a and 19b. And the steel belts 17a and 17b run,
The Y-direction carriages 11a, 11b connected to the steel belts 17a, 17b via connecting means 30, 31 move in a predetermined direction.

That movement, by the forward rotation of the motor 27, Y-direction carriage 11a, 11b is moved in the forward direction (Y _F direction), the reverse rotation of the motor 27, Y-direction carriage 11a, and 11b is the rear direction (Y _R direction) I do.

With the movement of the Y-direction carriages 11a and 11b, the X-direction guide rail 12 on which the X-direction carriage 13 is movably mounted moves integrally. Thereby, the X-direction carriage
The positioning of 13 in the Y direction is performed.

In this embodiment, the steel belt 17a (17
b) the driven pulley 19a (19b) and the driven pulley 20a
(20b) 1200mm, Y direction carriage 11a
The moving distance of (11b) is 1000mm, and the driving pulley 19a (19b)
The circumference is set to 200mm.

On the other hand, the positioning of the X-direction carriage 13 in the X direction
This is performed by the directional carriage moving device 16.

As shown in FIG. 3, the X-direction carriage moving device 16 includes a steel belt 35 as a running strip stretched along the X-direction guide rail 12 by being wound around driving pulleys 33 and 34. Configuration. The driving force of the motor 36, which is the driving source, is reduced by a reduction mechanism comprising a group of gears.
The driving force is transmitted to the driving pulley 33 via the drive 37.

The operation of the Y-direction carriage moving device 15 and the X-direction carriage moving device 16 is controlled by control means (not shown).
Are arbitrarily sent in the X direction and the Y direction according to the image information. The pen 4 mounted on the X-direction carriage 13 is opposed to a predetermined position on the drawing paper 2.

On the other hand, in synchronization with this movement operation, a pen-up / down mechanism (not shown) attached to the pen holder 32 is operated, and the pen 4 is brought into and away from the drawing paper 2.

The horizontal movement of the pen 4 by the Y-direction carriage moving device 15 and the X-direction carriage moving device 16 and the vertical movement of the pen 4 by the pen-up / down mechanism draws a drawing on the drawing paper 2 according to the drawing information.

The portion of the synchronous shaft 25 of the Y-direction carriage moving device 15 and the drive pulley 33 of the X-direction carriage moving device 16
A rotation speed detector (not shown) using an encoder is arranged between the speed reduction mechanism 37 and the speed reduction mechanism 37. Then, the Y-direction carriages 11a and 11b and the X-direction carriage 1
The movement amount of the motor 3 is detected and fed back to motor controllers (not shown) of the motors 27 and 36, respectively.

Next, referring to FIG. 1, FIG. 5, and FIG.
Right Y-direction carriage 11a and right steel belt 17a
The structure of the first connecting means 30 for connecting the first and second means will be described in detail.

The first connecting means 30 is composed of a connecting member 50 having high rigidity in the moving direction of the Y-direction carriage 11a and low rigidity in a direction orthogonal to the moving direction of the Y-direction carriage 11a.

In this example, one end is connected to the steel belt 17a,
The other end is connected to the Y-direction carriage 11a, and includes a leaf spring 51 having a U-shaped bent portion 51a in the middle. And according to the leaf spring 51 configured in this manner,
The fluctuation of the interval l (see FIG. 1) between the both end mounting portions can be absorbed by the elastic deformation of the U-shaped bent portion 51a formed in the middle.

Thus, the steel belts 17a is, in the normal rotation by the front direction of the motor 27 (Y _F direction), also when moving backward (Y _R direction) by the reverse rotation of the motor 27, the leaf spring 51 is Y-direction carriage 11a Since the rigidity is set to be large with respect to the moving direction of the
conveyed to a.

In addition, the Y-direction carriage due to misalignment or heat
The force (arrow ΔX) in the direction orthogonal to the direction of movement of the 11a is formed in a portion of the plate spring 51 whose rigidity is set to be smaller than that in the direction orthogonal to the direction of movement of the Y-direction carriage 11a, ie, in the middle. It can be absorbed by the elastic deformation of the U-shaped bent portion 51a. Thus, unlike the conventional fixed connection, unnecessary stress is not generated between the steel belt 17a and the Y-direction carriage 11a, and the linear running accuracy of the Y-direction carriage 11a can be improved. it can.

Therefore, the Y of the pen 4 mounted on the X-direction carriage 13 that moves with the movement of the Y-direction carriage 11a
High accuracy is ensured for movement in the direction.

On the other hand, an X carriage connecting means (not shown) for connecting the X direction carriage 13 and the steel belt 35 is also of a sliding type similar to the first connecting means 30, and is adapted to move the pen 4 in the X direction. High accuracy is assured.

In this way, high accuracy is secured for the movement of the pen 4 in the Y direction and the X direction, and highly accurate drawing is possible.

Note that the second connecting means 31 and the X carriage connecting means have the same basic configuration as the first connecting means 30, and a detailed description thereof will be omitted.

In the above-described embodiment, the present invention is applied to an automatic drawing apparatus for moving a recording means such as a pen as a processing means. Is also good. Furthermore, a coordinate reading device in which the processing means is a reading means for reading information recorded on the object to be processed, a cutting device in which the processing means is a cutting means such as a cutter for cutting the object to be processed, or the like. It is needless to say that the present invention may be applied to an automatic processing apparatus having a carriage.

Further, although the connecting means 30 is configured by a leaf spring having a U-shaped bent portion 51a in the middle, the shape of the bent portion 51a is not limited to the U shape.

Further, instead of a leaf spring, as shown in FIG. 7, a synthetic resin member 55d having a bent portion 55a folded in the middle is provided.
e configuration may be used. In short, it is sufficient that the rigidity is large in the moving direction of the Y-direction carriage 11a and small in the direction orthogonal to the moving direction of the Y-direction carriage 11a.

In addition, it is needless to say that the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention.

[Effects of the Invention] The present invention is configured as described above, and has the following effects.

2. The carriage moving device according to claim 1, wherein the connecting means for transmitting the movement of the running streak to the carriage connects one end to the running streak and connects the other end to the carriage, and the moving direction of the carriage. The rigidity is large and the rigidity is small in the direction perpendicular to the direction of movement of the carriage. Can be absorbed by the elastic deformation of the connecting member. As a result, unnecessary stress does not occur between the running streak and the carriage as in the case of the conventional fixed connection, and it is possible to prevent a decrease in the movement accuracy due to the generation of the unnecessary stress, and to improve the accuracy. High carriage movement can be performed.

According to the automatic processing device of the present invention, the connecting means for transmitting the movement of the running strip to the carriage connects one end to the running strip and connects the other end to the carriage, and moves the carriage. Since the connecting member has high rigidity in the direction and low rigidity in the direction perpendicular to the moving direction of the carriage, only the force in the running direction is transmitted between the running streak and the carriage, and the parallelism and heat are not properly controlled. The force in the direction perpendicular to the moving direction of the carriage due to the influence can be absorbed by the elastic deformation of the connecting member. Thereby, unlike in the case of the conventional fixed connection, unnecessary stress is not generated between the running strip and the carriage, and it is possible to prevent a decrease in movement accuracy due to generation of unnecessary stress,
The movement accuracy of the processing means that moves with the movement of the carriage is improved. As a result, highly accurate automatic processing of the object can be performed.

[Brief description of the drawings]

1 to 6 show an embodiment of the present invention.
FIG. 1 is a schematic front view partially showing the structure of a main part, FIG. 2 is an external perspective view of an automatic drawing apparatus, FIG. 3 is a schematic plan view of a pen moving means, and FIG. FIG. 5 is a schematic plan view showing the configuration of the main part, FIG. 6 is a schematic side view showing the same in partial cross-section,
FIG. 7 is a schematic front view showing a modification of the main part in a partial cross section. 2 drawing paper (workpiece), 4 pen (processing means), 10a, 10b guide means, 11a, 11b carriage, 15 Y-direction carriage moving device (carriage moving device), 17a , 17b …… Steel belt (travel strip), 30
... connecting means, 50 ... connecting member, 51 ... leaf spring, 51a ...
... formed part, 55 ... synthetic resin member, 55a ... serpentine bent part.

Continuation of the front page (72) Inventor Seiji Mitsui 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. (56) References JP-A-2-238975 (JP, A) (58) Fields surveyed ( Int.Cl. ⁶ , DB name) B43L 13/00 B41J 19/20 B26D 5/00

Claims (7)

(57) [Claims] 1. A carriage, which is guided reciprocally by a guide means, and a travel strip stretched so as to travel along a movement path of the carriage, are connected via connection means, and the travel strip is connected to the carriage. A carriage moving device configured to move the carriage as the vehicle travels, wherein the connecting means connects one end to the traveling strip and connects the other end to the carriage, and moves the carriage in a moving direction of the carriage. A carriage moving device comprising a connecting member having high rigidity and low rigidity in a direction orthogonal to the moving direction of the carriage. 2. A carriage, which is reciprocally guided by a guide means, is moved via a carriage moving device,
In an automatic processing apparatus capable of performing processing on an object to be processed by moving the processing means in accordance with the movement of the carriage, the carriage moving device may be moved along guide means for guiding the carriage reciprocally. A running strip stretched so as to travel, and having one end connected to the running strip and the other end connected to the carriage, and having a large rigidity in a moving direction of the carriage and a moving direction of the carriage. An automatic processing device comprising: a connecting member that is made of a connecting member having a small rigidity in a direction perpendicular to the direction and that transmits a movement of the running streak during traveling to the carriage. 3. The carriage moving device according to claim 1, wherein said connecting member comprises a leaf spring having a bent portion in a middle portion. 4. The carriage moving device according to claim 1, wherein said connecting member is made of a synthetic resin member having a bent part in a middle part. 5. The automatic processing apparatus according to claim 2, wherein said processing means is a recording means for recording information on an object to be processed. 6. An automatic processing apparatus according to claim 2, wherein said processing means is reading means for reading information recorded on an object to be processed. 7. The automatic processing apparatus according to claim 2, wherein said processing means is a cutting means for cutting an object to be processed.