JP5395628B2 - Cutting machine - Google Patents

Description

  The present invention relates to a cutting machine having a function of writing characters and symbols on the surface of a sheet material to be cut.

  Conventionally, parts of sewing products are manufactured by cutting sheet materials such as fabrics with a cutting machine. The cutting machine includes a cutting table and a cutting head, places a sheet material on the surface of the cutting table, moves the cutting head having a cutting blade, and cuts the sheet material. In the cutting machine, various methods are used to improve production efficiency.

  For example, the sheet material is cut at the same time to improve production efficiency. Sheet material such as fabric has air permeability, so if a plurality of sheets are laminated and the surface is covered with a non-breathable resin film or the like, cutting can be performed while sucking and holding the surface of the cutting table. it can. Although the continuous cutting of parts is performed with the cutting blade in contact with the sheet material, the cutting blade is moved away from the sheet material and moved faster than it is during cutting when the cutting is interrupted and moved. To do. If the cutting machine is provided with means for detecting the thickness of the sheet material and the range of operation for retracting the cutting blade is brought to the minimum necessary, the production efficiency can be further improved (for example, see Patent Document 1). .

  The parts after cutting are subjected to pick-up work to be removed from the cutting table, and are used in processes such as sewing. In general, it is impossible to know and identify information about a part only by the cut shape or the positional relationship between them. In order to improve the production efficiency of a sewn product, it is desired to facilitate identification of parts after cutting. In order to facilitate identification of parts, a cutting machine including a labeling device capable of attaching a label printed with information on the parts to the part is also known (for example, see Patent Document 2).

  Further, there are cases where parts having markings such as alignment are necessary for sewing, and a cutting machine including a marking pen on a cutting head is also known (see, for example, Patent Document 3). This cutting machine is also provided with a mechanism for partially cutting the resin film in order to mark the sheet material covered with the non-breathable resin film.

Japanese Patent No. 3786975 JP-A-5-124632 JP 2009-160683 A

  If a label printed with a bar code or the like indicating part information is attached to a part by a labeling apparatus such as Patent Document 2, it becomes useful for management of the part after cutting, and the production efficiency in pick-up work is also improved. However, the apparatus is expensive, and printing on the label is performed before mounting on the apparatus, and the management of the label having the printed information is also required. Since marking with a marking pen as in Patent Document 3 is not for identifying parts, it does not contribute to an improvement in production efficiency during pick-up work.

  An object of the present invention is to provide a cutting machine that enables parts to be identified by an inexpensive device and can improve production efficiency during pick-up work.

The present invention relates to a cutting machine including a cutting table having a sheet material placement surface, and a cutting head that cuts the sheet material while moving along the placement surface of the cutting table.
To the cutting head,
A holder for detachably holding a writing instrument for writing at the tip;
A cap that covers and seals the tip of the writing instrument held by the holder;
An elevating mechanism for elevating the holder so that the tip of the writing instrument contacts or separates from the surface of the sheet material placed on the cutting table;
A cam mechanism that acts on the cap in conjunction with the raising and lowering of the holder by the lifting mechanism, and when the tip of the writing instrument is in a standby state separated from the surface of the sheet material,
It is a cutting machine characterized by comprising.

Further, the present invention provides a pressing spring that urges the holder so that the tip of the writing instrument presses the surface of the sheet material.
It is further provided with the feature.

Further, in the present invention, the writing instrument includes a trunk whose tail portion protrudes upward from the holder,
The barrel has a stepped portion whose diameter decreases on the tip side in the holder,
A sealing member capable of sealing between the step portion of the trunk and the holder;
An abutting mechanism capable of switching between a state in which the barrel is pressed against the tail of the barrel and the barrel is pressed between the barrel and the holder by a sealing member and a state in which the tail is released;
It is further characterized by including.

In the present invention, the surface of the sheet material placed on the cutting table is contacted to detect the position of the surface, and the thickness of the sheet material is set based on the detected surface position of the sheet material. Lamination thickness setting means;
Control means for controlling the elevating mechanism to bring the tip of the writing instrument into contact with the surface of the sheet material based on the surface position of the sheet material detected by the lamination thickness measuring means;
It is further characterized by including.

  According to the present invention, when the tip of the writing tool held by the holder is brought into contact with the surface of the sheet material by the lifting mechanism and the cutting head is moved, the letters and symbols for identifying the parts are written on the surface of the sheet material. can do. When the tip of the writing instrument is separated from the surface of the sheet material and is in a standby state, the tip of the writing instrument can be sealed with a cap, so the tip of the writing instrument becomes dirty with dust or the like while cutting the sheet material without writing Or it can be made to wait without polluting the sheet material with the tip of the writing instrument. By using a commercial product or a general-purpose product for the writing instrument, a low-cost device can be realized. Parts can be identified even with an inexpensive device, and production efficiency can be improved during pick-up work. Since the cap is opened and closed by a cam mechanism that acts on the cap in conjunction with the raising and lowering of the holder by the raising and lowering mechanism, it is not necessary to have an independent drive source, and a simple and inexpensive device can be achieved.

  Moreover, according to this invention, the front-end | tip of a writing instrument can be pressed against the surface of a sheet material with the press spring in a holder, and the writing pressure to the surface which prints can be maintained.

  Further, according to the present invention, the contact mechanism can switch between a state in which the space between the body of the writing tool and the holder is sealed and a state in which the writing tool is removed and replaced for convenience.

  Further, according to the present invention, the laminated thickness of the sheet material is measured, the surface of the sheet material is detected according to the laminated thickness, and for example, the identification information is written in a state where the tip of the writing instrument is slightly pushed from the surface. Is possible.

FIG. 1 is a partial front sectional view showing a simplified configuration of a main part of a cutting machine 1 according to an embodiment of the present invention. FIG. 2 is a partial front view showing a configuration in a standby state by the elevating mechanism 22 of FIG. FIG. 3 is a right side view of the lifting mechanism 22 and the like shown in FIG. FIG. 4 is a right side view showing a state in which the lifting mechanism 22 of FIG. 2 has lowered the pen 20 to the lowest end. FIG. 5 is a partial front view showing the configuration of the contact mechanism 27 of FIG. FIG. 6 is a front view showing the pen 20 of FIG. 2 and the components of the holder 21.

  Hereinafter, the cutting machine 1 as one Example of this invention is demonstrated with reference to FIGS. In the present embodiment, the same reference numerals may be given to portions corresponding to the portions described above, and overlapping description may be omitted.

  FIG. 1 shows a simplified configuration of a main part of a cutting machine 1 according to an embodiment of the present invention. It is a partial front sectional view. The cutting machine 1 includes a cutting table 2 and a cutting head 3. The cutting head 3 reciprocates along a Y beam 4 extending in a direction perpendicular to the paper surface. The Y beam 4 reciprocates in the horizontal direction of the page. The movement of the Y beam 4 is the X direction, the movement of the cutting head 3 relative to the Y beam 4 is the Y direction, and the cutting head 3 is a two-dimensional combination of the X direction and the Y direction along the mounting surface of the cutting table 2. Movement can be performed.

  The cutting head 3 includes a cutting blade 5 and a cutting mechanism 6, and the cutting blade 5 can be brought into contact with the mounting surface side of the cutting table 2 or the cutting blade 5 can be separated from the surface of the cutting table 2. it can. For the knife-shaped cutting blade 5 as shown in the figure, the direction of the blade edge can be changed while giving a reciprocating vibration parallel to the blade edge provided on the side. As the cutting blade 5, a rotary blade or the like can be used. At the time of cutting, the foot presser 7 is lowered around the cutting blade 5 to hold the mounting surface of the sheet material to be cut.

  The cutting table 2 forms a mounting surface with the air-permeable surface 9 of the transport and suction device 8. The breathable surface 9 is formed by arranging bristle brushes or using a belt such as felt. The conveyance is performed in the X direction, which is the horizontal direction in the figure. From one side, a sheet material 10 such as a fabric is carried in, and the sheet material 10 is held by suction. The surface of the sheet material 10 is covered with a sealing sheet 11 such as a non-breathable resin film, and the cutting machine 1 treats the sheet material 10 and the sealing sheet 11 as the sheet material 10 to be cut. Further, depending on the conditions, the sheet material 10 may be cut only without using the sealing sheet 11. In the following description, the sealing material 11 and the sheet material 10 may be referred to.

  The laminated thickness of the sheet material 10 and the sealing sheet 11 can be measured by the laminated thickness measuring means 12 using the foot presser 7 by the method disclosed in Patent Document 1. The measurement of the laminated thickness by the laminated thickness measuring means 12 is based on the descending distance from the reference position where the foot presser 7 is lifted away from the surface of the sealing sheet 11 to the position where the foot presser 7 is lowered and contacts the surface. Then, the control means 13 measures.

  The cutting machine 1 according to this embodiment includes a pen 20 as a writing tool in the cutting head 3. The pen 20 is, for example, a commercially available oil-based pen, and is supplied to the market at a low cost and in large quantities, and writing is performed with the tip 20a of the tip. Liquid ink is stored in the pen body 20b. The holder 21 holds the pen 20 detachably. The elevating mechanism 22 elevates and lowers the holder 21 so that the pen tip 20 a contacts or separates from the surface of the sheet material 10 placed on the cutting table 2 under the control of the control means 13. The cam mechanism 23 covers the cap 50 so as to seal the space around the nib 20a in a standby state in which the nib 20a is sufficiently raised and separated from the surface of the sheet material 10. As will be described later, the cam mechanism 23 is interlocked with the elevating mechanism 22, and when the pen tip 20a is lowered, the sealing by the cap 50 is released and the pen tip 20a is exposed. The descending amount by the elevating mechanism 22 is controlled by the control means 13 so as to correspond to the measurement result of the laminated thickness by the laminated thickness measuring means 12. The pressing spring 24 urges the pen tip 20 a in a direction to press the surface of the sheet material 10. When the nib 20a is lowered slightly from the surface of the sheet material 10 detected based on the laminated thickness measurement, the nib 20a is raised by a reaction force from the surface, and the pressure force required for printing by the pressing spring 24 is increased. Can be generated.

  The printing for part identification after cutting preferably precedes the cutting of the sheet material 10 by the cutting blade 5. This is because after cutting, the contour of the part is cut, and the part is displaced by the pen pressure, making it difficult to print. If the printing precedes the cutting, for example, each part may be cut after printing on the entire part, or printing and cutting may be repeated for each part.

  2 and 3 show the configuration of a part including the lifting mechanism 22 of FIG. The elevating mechanism 22 and the like are attached to the attachment base 25 of the cutting head 3 via the elevating mechanism attaching part 26a of the bracket 26. The bracket 26 also has an abutment mechanism 27 that abuts on the tail of the pen 20 protruding upward from the holder 21 and can switch between a state in which the pen 20 is held by the holder 21 and a state in which the tail of the pen 20 is released. Provided. The driving force as the elevating mechanism 22 is generated by the motor 30 attached to the elevating mechanism attaching portion 26a via the motor base 29. A pinion 31 is attached to the output shaft of the motor 30. The pinion 31 meshes with a rack 32 a formed on one side of the rack member 32. A long hole 32 b is formed in the rack member 32. The lower end of the rack member 32 is bent to form a connecting portion 32 c and faces the central portion of the connecting plate 33. Near the both ends of the connecting plate 33, the upper ends of the two guide shafts 34 are respectively attached. The guide shaft 34 passes through a vertical hole provided in the shaft guide portion 26b of the bracket 26, and a lower end thereof is inserted into an insertion hole provided in the holder support 35, and the holder support 35 is attached.

  2 and 3 show a standby state in which the rack member 32 is most elevated, and this state is detected by a sensor such as a microswitch 36. FIG. Although the microswitch 36 is attached to the cover plate 37, the illustration is omitted in FIG. The cover plate 37 is attached to the motor base 29 with an attachment screw 38 together with the motor 30. A gap is formed between the cover plate 37 and the motor base 29 by a collar 39 inserted through the mounting screw 38, and the rack member 32 is inserted into this gap. A pair of upper and lower collars 39 close to the micro switch 36 are engaged with the long holes 32b of the rack member 32, and are used for guidance when driving up and down.

  For the pen 20 held by the holder 21, the contact portion 40 a of the contact plate 40 is brought into contact with the tail portion and pressed downward. The contact plate 40 is attached to the bracket 26 in a state where the stepped guide bolt 41 is fitted in the guide holes 40b and 40c. A tension spring 42 is stretched between the contact plate 40 and the bracket 26, and the contact portion 40a biases the tail portion of the pen 20 downward. Thereby, as will be described later, the sealed state with respect to the pen body 20b which is the body of the pen 20 is maintained in the holder 21. The buffer spring 44 is mounted between the head of the adjusting screw 45 that is screwed into the connecting portion 32 c of the rack member 32 and the connecting plate 33.

  A cam mechanism 23 is provided below the tension spring 42. The cam mechanism 23 opens and closes the cap 50 and includes a mounting plate 51, an opening / closing cam 52, a roller 53, and a torque spring 54. In a state where the rack member 32 is raised and the roller 53 is in contact with the curved surface that becomes the cam portion 52a of the opening / closing cam 52, the cap 50 seals the periphery of the pen tip 20a. An upper end of the mounting plate 51 is attached to the bracket 26. The cap 50 has a swing shaft 55 at a portion of the torque spring 54, and the swing shaft 55 is supported by the lower end of the mounting plate 51. The roller 53 is attached to the cap 50. The open / close cam 52 is attached to the holder support 35 at the lower end. The torque spring 54 is biased clockwise in FIG. 3 so that the cap 50 is closed.

  FIG. 4 shows a state in which the lifting mechanism 22 of FIG. 3 lowers the pen 20 to the lowest end, and the cam mechanism 23 releases the sealing of the pen tip 20 a by the cap 50. Along with the pen 20, the opening / closing cam 52 attached to the holder support 35 is also lowered with respect to the cap 50. The flat surface serving as the cam portion 52b of the opening / closing cam 52 pushes the roller 53 laterally against the urging force of the torque spring 54, swings the cap 50 counterclockwise, and releases the seal. Such release of sealing is naturally possible if the rack member 32 is lowered from the standby state shown in FIGS. 2 and 3 so that the roller 53 comes into contact with the cam portion 52b, even if it does not descend to the lowest end. It becomes. That is, the pen tip 20a can be lowered according to the laminated thickness of the sheet material 10 and used for printing on the surface in a state where the sealing is released. The cap 50 is formed with a recess 50a that forms a space that covers the pen tip 20a in the sealed state shown in FIG.

  FIG. 5 shows a configuration of the contact mechanism 27 of FIG. The contact plate 40 has two guide holes 40b and 40c on the upper and lower sides. Even if the guide hole 40b has a long hole shape, the guide hole 40c has an L-shape, so that the contact portion 40a is removed from the tail portion of the pen body 20b to facilitate the replacement of the pen 20. Evacuation can be performed.

  FIG. 6 shows a state in which the pen 20 is accommodated in the holder 21 and the configuration of components related to the holder 21 as shown in FIG. The pen 20 includes a pen tip 20a at the tip and a pen main body 20b serving as a body. A portion of the pen body 20b accommodated in the holder 21 is provided with a step portion 20c whose diameter decreases on the tip side. The holder 21 includes a lower cylinder 60, an upper cylinder 61, an O ring 62, a seal ring 63, and sleeves 64 and 65 together with the pressing spring 24. The lower cylinder 60 has a male screw part 60 a at the upper end, and can be screwed into a female screw part 61 a provided at the lower end of the upper cylinder 61. The O-ring 62 and the seal ring 63 are held by an O-ring holding portion 60b and a seal ring holding portion 60c provided on the lower cylinder 60, respectively. A male screw portion 60 d is also provided at the lower end of the lower cylinder 60.

  The pen 20 that is commercially available as a writing instrument and uses oil-based ink is a pen tip 20a formed of a felt-like material and leaks out, and can be printed on the sealing sheet 11 made of a resin film. A volatile solvent is used to make the ink dry quickly, and the cap 20d is also used to prevent the solvent from being volatilized and lost from the nib 20a when not in use. When mounting on the cutting machine 1, the cap 20d can be sealed with the cap 50, so the cap 20d is not used. The difference in thickness of the pen body 20b is adjusted by mounting the sleeves 64 and 65 above the stepped portion 20c of the pen body 20b. When the seal ring 63 and the O-ring 62 are inserted into the lower cylinder 60 and the pen 20 with the sleeves 64 and 65 covered around the pen body 20b is inserted, then the pressing spring 24 is inserted and the upper cylinder 61 is covered. The pen 20 can be accommodated in the holder 21. In this state, the pressing spring 24 urges the pen body 20b downward via the sleeves 64 and 65. The male screw portion 60d at the lower end of the lower cylinder 60 is screwed into the female screw portion 35a of the holder support 35.

  In the standby state as shown in FIGS. 2 and 3, the holder support 35 is covered with the cap 50 from below. The seal ring 63 seals between the periphery of the nib 20 b and the recess 50 a of the cap 50. When the tail end of the pen body 20b is pushed down from above by the contact portion 40a of the contact plate 40, the O-ring 62 serves as a sealing member to hold the step 20c of the pen body 20b and the O-ring of the lower cylinder 60. It is pressed between the parts 60b. When printing is performed with the pen tip 20 a in contact with the surface of the sheet material 10, the pen 20 is raised by the writing pressure, and the sealing state between the space near the pen tip 20 a and the holder 21 by the O-ring 62 is loosened. However, the sealing state can be recovered by returning to the standby state.

  In the embodiment described above, the pen 20 that leaks oil-based ink from the pen tip 20a is used as a writing instrument, but a ballpoint pen or the like can be used as well. The ink may be a solid such as a colored pencil or a crayon. Further, when printing the identification information directly on the surface of the sheet material 10, water-based ink may be usable. If the tip of the writing instrument is sealed with the cap 50, not only drying of the ink but also adhesion of dirt due to dust at the time of cutting can be prevented. In addition, if the tip of the writing instrument is exposed, ink or the like may adhere to the sheet material 10 and become dirty. If the tip of the writing instrument is sealed, the sheet material 10 can be prevented from being stained.

DESCRIPTION OF SYMBOLS 1 Cutting machine 2 Cutting table 3 Cutting head 7 Foot presser 10 Sheet material 11 Sealing sheet 12 Lamination thickness measurement means 13 Control means 20 Pen 20a Pen tip 20b Pen main body 21 Holder 22 Lifting mechanism 23 Cam mechanism 24 Pressing spring 27 Contact mechanism 50 Cap 62 O-ring

Claims (4)

In a cutting machine including a cutting table having a sheet material placement surface, and a cutting head for cutting the sheet material while moving along the placement surface of the cutting table,
To the cutting head,
A holder for detachably holding a writing instrument for writing at the tip;
A cap that covers and seals the tip of the writing instrument held by the holder;
An elevating mechanism for elevating the holder so that the tip of the writing instrument contacts or separates from the surface of the sheet material placed on the cutting table;
A cam mechanism that acts on the cap in conjunction with the raising and lowering of the holder by the lifting mechanism, and when the tip of the writing instrument is in a standby state separated from the surface of the sheet material,
A cutting machine characterized by comprising. In the holder, a pressing spring that biases the tip of the writing instrument to press the surface of the sheet material,
The cutting machine according to claim 1, further comprising: The writing instrument includes a trunk whose tail projects upward from the holder,
The barrel has a stepped portion whose diameter decreases on the tip side in the holder,
A sealing member capable of sealing between the step portion of the trunk and the holder;
An abutting mechanism capable of switching between a state in which the barrel is pressed against the tail of the barrel and the barrel is pressed between the barrel and the holder by a sealing member and a state in which the tail is released;
The cutting machine according to claim 2, further comprising: A lamination thickness setting means for detecting the position of the surface in contact with the surface of the sheet material placed on the cutting table, and setting the lamination thickness of the sheet material based on the detected surface position of the sheet material; ,
Control means for controlling the elevating mechanism to bring the tip of the writing instrument into contact with the surface of the sheet material based on the surface position of the sheet material detected by the lamination thickness measuring means;
The cutting machine according to any one of claims 1 to 3, further comprising:

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