JP2019155489A - Drilling device - Google Patents

Abstract

To achieve improvement in productivity and workability of a device.SOLUTION: A drilling device comprises: a drilling tool 2 which drills a work-piece; a cradle 31 for the drilling tool; a telescopic mechanism which telescopically moves the drilling tool toward the cradle; a belt-like protective sheet 41 which is so located on an upper side of the cradle as to pass a drilling position of the drilling tool; and a transport mechanism 40 which transports the belt-like protective sheet along a constant direction. Since the belt-like protective sheet 41 is so transported as to pass the drilling position of the drilling tool, the drilling tool can be always lowered to a non-use position of the protective sheet 41, and it is not required for every time replacement of the protective sheet which has a size substantially same as that of the work-piece.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a punching device that punches a sheet-like object such as cloth or leather.

  A conventional drilling device includes a holding frame that holds a workpiece such as a skin in a state of being spread horizontally, a moving mechanism that moves the holding frame to an arbitrary position on a horizontal plane, and a punch that moves the punch up and down. And drilling is performed at an arbitrary position of the workpiece (for example, see Patent Document 1).

JP 2017-18151 A

The punching device performs punching by lowering the punch while the workpiece is disposed between the punch and the cradle.
At that time, if the tip of the punch reaches the cradle, chipping and deterioration are likely to occur, and noise and vibration are generated during processing, so when holding the workpiece with the holding frame, The tip of the punch was protected by inserting a protective sheet made of a material such as a resin softer than the cradle on the lower side.

However, if the protective sheet is used once, scratches, holes, irregularities, etc. will occur in various places, and functions such as punch protection, noise and vibration reduction will be impaired in the next processing, and processing position deviation due to irregularities will be Since there is a possibility that it will occur, it has been replaced every work piece.
For this reason, the work efficiency is reduced due to the replacement work, and one protective sheet is consumed per work piece, resulting in an increase in processing cost.

  An object of the present invention is to improve productivity and economy.

The invention according to claim 1 is a drilling apparatus,
A drilling tool for drilling a workpiece;
A cradle for the drilling tool;
An advancing / retreating mechanism for moving the drilling tool forward and backward toward the cradle;
A band-shaped protective sheet arranged so as to pass through a drilling position of the drilling tool on the upper side of the cradle;
And a transport mechanism that transports the belt-shaped protective sheet along the longitudinal direction thereof.

The invention according to claim 2 is the drilling device according to claim 1,
The transport mechanism intermittently transports the belt-shaped protective sheet at a specified feed pitch per one reciprocating operation of the drilling tool by the advance / retreat mechanism.

The invention according to claim 3 is the drilling device according to claim 1 or 2,
A mounting table for mounting the workpiece;
A guide groove for passing the belt-shaped protective sheet is provided on the mounting surface of the mounting table.

The invention according to claim 4 is the drilling device according to any one of claims 1 to 3,
A holding frame for holding the workpiece;
And a moving mechanism for moving the holding frame in a two-dimensional direction.

The invention according to claim 5 is the drilling device according to claim 4,
The advance / retreat mechanism can exchange and hold the drilling tool and the sewing needle,
The cradle is detachable,
A knotting mechanism for forming a seam by a sewing thread in cooperation with the sewing needle is provided.

The invention described in claim 6 is the drilling device according to claim 4,
A sewing machine having a needle up-and-down movement mechanism that holds and holds the sewing needle and a knot mechanism that forms a seam by a sewing thread in cooperation with the sewing needle;
The moving mechanism includes a drilling position by the drilling tool and a needle drop position by the sewing machine in a movable range of the holding frame.

Since the present invention includes a belt-shaped protective sheet disposed so as to pass the drilling position of the drilling tool on the upper side of the cradle, and a transport mechanism that transports the belt-shaped protective sheet along a certain direction, When the drilling tool is lowered every time, the protective sheet can be moved, and the drilling tool can be lowered to an unused location.
Therefore, it is possible to prevent the drilling tool from descending at the uneven portions such as indentations and scratches on the protective sheet, and it is possible to realize a good drilling process without being affected by the unevenness.
In addition, since the protective sheet is transported in the longitudinal direction as a belt, there is no need to prepare a protective sheet of the same size as the workpiece and replace it every time the workpiece is sewn. By reducing the amount, the economy can be improved, and the complexity of the replacement work can be eliminated to improve the productivity.

It is a perspective view of the drilling apparatus which is embodiment of invention. It is an expansion perspective view of a drilling apparatus. It is the front view which notched a part of drilling apparatus. It is a top view of a protection sheet. It is a front view which shows the other example of a drilling apparatus.

[Overall configuration of electronic cycle sewing machine]
A drilling device 10 according to an embodiment of the present invention will be described with reference to FIGS.
This drilling device 10 realizes a function as a drilling device by exchanging and adding a part of the configuration to an existing sewing machine. Further, the hole punching device 10 also has a function as a sewing machine, and can function as a sewing machine by returning the exchanged configuration to the original state. Here, the case where what is called an electronic cycle sewing sewing machine is utilized as a basis of the drilling device 10 is illustrated. The electronic cycle stitching machine has a holding frame for holding a cloth that is a sewing object to be sewn, and the holding frame moves relative to the sewing needle, so that the cloth held on the holding frame has a predetermined shape. A sewing machine that forms a seam based on a sewing pattern.
The punching device 10 uses the characteristics of the electronic cycle stitching sewing machine to hold the workpiece on the holding frame and perform drilling at an arbitrary position on the workpiece.

1 is a perspective view of the drilling device 10, FIG. 2 is an enlarged perspective view, and FIG. 3 is a front view.
Here, the direction in which the drilling tool 2 described later moves up and down is defined as the Z-axis direction (vertical direction), and a certain direction perpendicular thereto is defined as the X-axis direction (left-right direction), both the Z-axis direction and the X-axis direction. The direction perpendicular to the Y axis direction is defined as the Y-axis direction (front-rear direction).
As shown in FIG. 1, the drilling device 10 is disposed on the upper surface of the table T, and a pedal P for operating the drilling device 10 is provided below the table T.

  The drilling device 10 includes a drilling tool 2 for drilling a workpiece, a pedestal 31 for the drilling tool 2, an advancing / retreating mechanism for moving the drilling tool 2 forward and backward toward the pedestal 31, and drilling on the upper side of the cradle 31. A belt-shaped protective sheet 41 disposed so as to pass through the drilling position of the tool 2, a transport mechanism 40 that transports the belt-shaped protective sheet 41 along the longitudinal direction thereof, and a mounting table 30 on which a workpiece is mounted. A holding frame 61 that holds the workpiece, a moving mechanism 60 that moves the holding frame 61 in a two-dimensional direction, a sewing needle that can be exchanged for the drilling tool 2, and a sewing thread in cooperation with the sewing needle. A knot mechanism for forming a seam, a frame 20 for supporting the above-described components, and a control device (not shown) are provided.

[flame]
As shown in FIG. 1, the drilling device 10 includes a frame 20 whose outer shape is substantially U-shaped in a side view. The frame 20 is constituted by a sewing machine frame, and includes an arm portion 21 that extends in the front-rear direction and forms an upper portion of the drilling device 10, a bed portion 22 that forms a lower portion of the drilling device 10, and extends in the front-rear direction. It has a vertical body portion 23 that connects the portion 22.
This drilling device 10 has a power transmission mechanism disposed in a frame 20 and has a main shaft (not shown) and a lower shaft (not shown) which are rotatable and arranged along the Y-axis direction. The main shaft is disposed inside the arm portion 21, and the lower shaft is disposed inside the bed portion 22.

[Advance / Retreat Mechanism]
The main shaft is connected to the output shaft of the main shaft motor and is provided with turning power. The lower shaft is connected to the main shaft via a vertical axis (not shown) so that when the main shaft rotates, the power of the main shaft is transmitted to the lower shaft side via the vertical axis, and the lower shaft rotates. It has become. Note that illustration of these axes is omitted.
In the vicinity of the front end of the main shaft, an elevating shaft composed of a needle bar supported so as to be movable up and down is disposed. The lifting shaft is supported in the arm portion 21 so as to be movable up and down in parallel with the Z-axis direction and along the Z-axis direction. The elevating shaft is connected to the main shaft via a crank mechanism, and the elevating shaft performs one reciprocating vertical movement for each rotation of the main shaft.
And the drilling tool 2 is mounted | worn with the lower end part of the raising / lowering axis | shaft. The drilling tool 2 can be attached and detached by a hugging structure. When the drilling device 10 is used as a sewing machine, the drilling tool 2 can be removed and a sewing needle can be attached.
The main shaft, main shaft motor, crank mechanism, and elevating shaft constitute an advance / retreat mechanism.

[Drilling tool]
The drilling tool 2 is supported by the lower end portion of the lifting shaft below the distal end portion of the arm portion 21. The drilling tool 2 has a cylindrical shape and is oriented parallel to the Z-axis direction. And the thickness of a surrounding wall becomes thin as the lower end part of the drilling tool 2 goes below, and the lower end is sharp. Therefore, when the lower end portion of the drilling tool 2 is pressed against the workpiece, the hole can be drilled in a round shape.
The drilling tool 2 is made of, for example, high-speed steel, which is a hard material, and can perform a good drilling process on a workpiece such as a sheet-like cloth or leather. In addition, you may form the drilling tool 2 from the other material which has comparable hardness and durability.

[Kama]
At the front end of the lower shaft (not shown), as shown in FIG. 3, there is provided a hook 3 used when the drilling device 10 is used as a sewing machine. The hook 3 is a well-known vertical hook, and consists of an outer hook, an inner hook, a bobbin case, and a bobbin. When the lower shaft rotates together with the main shaft, the outer hook also rotates and the upper thread is passed through the sewing needle. The sword tip of the outer hook can be captured and entangled with the lower thread as the sewing thread fed out from the bobbin, forming a seam,

[Mounting table and cradle]
As shown in FIGS. 1 to 3, a mounting table 30 for mounting a workpiece is provided on the bed portion 22. The mounting table 30 is a flat plate whose upper surface is a horizontal mounting surface, and below the drilling tool 2 is a needle drop hole 32 where needle dropping is performed when the drilling tool 2 is replaced with a sewing needle. It has been drilled.
Further, a guide groove 33 is formed on the mounting surface of the mounting table 30 so as to pass the belt-shaped protective sheet 41 along the X-axis direction so as to pass through the needle drop hole 32. Furthermore, the periphery of the formation position of the needle drop hole 32 in the guide groove 33 is one step deeper, and a fitting recess 34 into which the cradle 31 is fitted is formed.
Further, at one end and the other end of the guide groove 33, the feeding port 35 through which the protective sheet 41 is fed from the lower side of the mounting table 30 and the protective sheet 41 that has passed through the guide groove 33 are disposed below the mounting table 30. A recovery port 36 for recovery is formed.

In addition, when using the drilling apparatus 10 as a sewing machine, the needle plate which obstruct | occludes the whole guide groove 33 of the mounting base 30 is equipped. When the needle plate is fitted in the guide groove 33, the upper surface thereof is flush with the upper surface of the mounting table 30, and a needle drop hole having the same diameter is formed vertically above the needle drop hole 32.
Moreover, the cradle 31 mentioned above is removable from the fitting recessed part 34, and when using the drilling apparatus 10 as a sewing machine, the cradle 31 is removed.

  The cradle 31 is located at a lowering position of the drilling tool 2 and is formed of a metal having toughness that can be durable without cracking even if the tip of the lowering drilling tool 2 is in direct contact, for example, carbon tool steel. Note that the cradle 31 may be formed of other materials having similar hardness and durability.

[Holding frame and moving mechanism]
As shown in FIG. 1, a holding frame 61 that holds a workpiece is disposed on the mounting table 30. Each of the holding frames 61 includes an upper plate and a lower plate having a rectangular frame shape, and a workpiece can be held between them. The workpiece sandwiched between the upper and lower plates of the rectangular frame is subjected to a drilling operation by the drilling tool 2 inside the frame.

The moving mechanism 60 includes a moving table 62 that supports the holding frame 61, an X-axis motor that serves as moving power along the X-axis direction of the moving table 62, and Y that serves as moving power along the Y-axis direction of the moving table 62. An axis motor, a transmission mechanism that transmits a moving force along the X-axis direction from the X-axis motor to the moving table 62, and a transmission mechanism that transmits a moving force along the Y-axis direction from the Y-axis motor to the moving table 62. I have.
Thus, the holding frame 61 is arbitrarily moved and positioned in each of the X-axis direction and the Y-axis direction, and the drilling tool 2 is relatively positioned at an arbitrary position on the XY plane with respect to the workpiece. And can be drilled.

[Protective sheet and transport mechanism]
As shown in FIG. 3, the protection sheet 41 is formed in a long band shape, and is wound around the reel R and held in a roll shape.
The width of the protective sheet 41 in the width direction orthogonal to the longitudinal direction is set to be wider than at least the outer diameter of the tip of the drilling tool 2 and is conveyed to the upper side of the cradle 31. When the workpiece is drilled, the tip of the drilling tool 2 penetrating the workpiece collides with the protective sheet 41.
The protective sheet 41 is made of a material such as a resin softer than the drilling tool 2 and the pedestal 31, for example, non-crystalline polyester (PET). It is possible to protect the tip, reduce noise due to a direct collision between the drilling tool 2 and the cradle 31, and the like. In addition, you may form the protection sheet 41 from other resin and other materials from which the same effect | action is acquired.
However, the protective sheet 41 is attached to the lifting shaft so that the lower end of the drilling tool 2 is lowered until it reaches the protective sheet 41 so that the drilling tool 2 performs a good drilling process. As shown in FIG. 4, an indentation M is formed at a position vertically below the drilling tool 2 of the protective sheet 41.

  As shown in FIGS. 2 and 3, the transport mechanism 40 is disposed in the bed portion 22. That is, the transport mechanism 40 includes a passive sprocket 42 that guides a protective sheet 41 that is fed out from a reel R that is rotatably supported in the bed portion 22, and a sheet that supports the protective sheet 41 so as to be in close contact with the outer periphery of the passive sprocket 42. It passes through the press 43, the sheet break sensor 44 for detecting the presence or absence of the protective sheet 41 between the reel R of the protective sheet 41 and the passive sprocket 42, and the guide groove 33 of the mounting table 30, and is returned into the bed portion 22. A driving sprocket 45 for sending the protective sheet 41, a sheet presser 46 that supports the protective sheet 41 so as to be in close contact with the outer periphery of the driving sprocket 45, a conveyance motor (not shown) that applies rotational force to the driving sprocket 45, and the driving sprocket 45. And a recovery box 47 for recovering the protective sheet 41 sent downward. .

The passive sprocket 42 is supported so as to be rotatable around the Y axis below the delivery port 35 of the mounting table 30 described above, and the reel R is supported so as to be rotatable around the Y axis further below the passive sprocket 42. ing.
The reel R and the passive sprocket 42 are arranged so that the protective sheet 41 fed out from the reel R contacts the outer periphery at the upper part of the passive sprocket 42 and reaches the feeding port 35.
The sheet presser 43 is provided at a position where the protective sheet 41 is in contact with the passive sprocket 42 arranged as described above, and presses the protective sheet 41 so as not to be separated from the passive sprocket 42 due to the occurrence of slack or the like.

Further, the passive sprocket 42 is driven by the protection sheet 41 conveyed by the drive sprocket 45 without being applied with a rotational force from the outside. The passive sprocket 42 has a built-in torque limiter so that the protective sheet 41 conveyed by the drive sprocket 45 does not loosen in the middle.
The torque limiter functions as a torque brake and applies a constant torque resistance to external torque.

The sheet break sensor 44 is an optical sensor that detects the presence or absence of the protective sheet 41 passing between the reel R of the protective sheet 41 and the passive sprocket 42 from the detection light shielding state.
While the state where the protective sheet 41 is present is detected by the sheet break sensor 44, the control device of the punching device 10 performs control for permitting the conveyance of the protective sheet 41, and the state where the protective sheet 41 is absent by the sheet break sensor 44. Is detected, control for stopping the conveyance of the protective sheet 41 is performed.

Note that the sheet break sensor 44 can detect both the state in which the protective sheet 41 of the reel R is all drawn out and is empty, and the case where the protective sheet 41 is cut halfway for some reason.
Note that any sensor that can detect the presence or absence of the protective sheet 41 can be used as the sheet break sensor 44. For example, a contact-type sensor that contacts the protective sheet 41 may detect the presence or absence of the protective sheet 41 by eliminating the contact pressure when the protective sheet 41 is exhausted.

The drive sprocket 45 is supported so as to be rotatable about the Y axis below the recovery port 36 of the mounting table 30 described above.
The drive sprocket 45 is arranged so that the protective sheet 41 that has passed through the guide groove 33 of the mounting table 30 and is recovered from the recovery port 36 contacts the outer periphery at the top of the drive sprocket 45 and reaches the recovery box 47. Yes.
The sheet presser 46 is provided at a position where the protective sheet 41 is in contact with the drive sprocket 45 arranged as described above, and presses the protective sheet 41 so as not to separate from the drive sprocket 45 due to occurrence of slack or the like.

The drive sprocket 45 is connected to the output shaft of the transport motor directly or indirectly through a transmission mechanism, and rotational force is input from the transport motor.
The transport motor is, for example, a stepping motor, and can rotate the drive sprocket 45 at an arbitrary speed and an arbitrary angular amount.
Then, the control device monitors the output of the shaft angle detector or encoder attached to the main shaft motor, and after the drilling tool 2 is lowered and drilled, the conveying motor intermittently moves the protective sheet 41 at a constant feed pitch during the ascent. The conveyance motor is controlled synchronously so as to convey the image.
The feed pitch of the protective sheet 41 by the transport motor is set to be larger than at least the outer diameter of the lower end portion of the drilling tool 2 as shown in FIG. However, the consumption of the protective sheet 41 can be reduced by setting the feed pitch so that the interval between the indentations is as small as possible, which is more preferable from the viewpoint of economy.

[pedal]
The pedal P functions as an operation pedal for driving the spindle motor to start drilling. That is, the pedal P incorporates, for example, a sensor (depression amount detecting means) configured by a variable resistor or the like for detecting the depression operation position when the pedal P is depressed, and an output signal from the sensor is An operation signal of the pedal P is output to the control device, and the control device is configured to drive and operate the spindle motor in accordance with the operation signal.

[Other configuration as sewing machine]
As described above, the drilling device 10 can be used as a sewing machine by replacing the drilling tool 2 with a sewing needle.
For this reason, the drilling device 10 has a configuration that is not used for drilling, but is used when used as a sewing machine.
For example, an intermediate presser and its elevating mechanism are provided next to the lifting shaft to press the sewing product that moves up and down by the sewing needle when the sewing product is held on the holding frame 61. This intermediate presser is detachable, and is removed when the drilling tool 2 is mounted.
Further, a balance mechanism, a thread tension, and a thread guide necessary for the sewing machine are also provided, but these are not shown in FIGS.

[Operation of drilling device]
In the drilling device 10 having the above-described configuration, the control device stores machining data in which a plurality of drilling positions for a workpiece are stored.
When the pedal P is depressed, the spindle motor is activated, and the workpiece held by the holding frame 61 is controlled by controlling the X-axis motor and the Y-axis motor in synchronization with the lowering operation of the drilling tool 2 each time. The workpiece is conveyed so that the drilling tool 2 is positioned at the drilling position determined in the processing data.
On the other hand, in the transport mechanism 40, the transport motor is driven in synchronization with the lowering operation of the drilling tool 2, the protective sheet 41 is intermittently transported at a constant feed pitch, and every time the drilling tool 2 is lowered, Control is performed so that the drilling tool 2 descends to an unused position of the protective sheet 41.

[Technical effects of drilling equipment]
The hole punching device 10 having the above-described configuration conveys the belt-shaped protective sheet 41 arranged so as to pass the hole drilling position of the hole drilling tool 2 above the cradle 31 and the belt-shaped protective sheet 41 along a certain direction. Since the transport mechanism 40 is provided, the protective sheet 41 can be moved every time the drilling tool 2 is lowered, and the drilling tool 2 can be lowered to an unused location.
Therefore, it is possible to avoid the drilling tool 2 from descending in the uneven portions such as indentations and scratches in the protective sheet 41, and it is possible to realize a good drilling process without being affected by the unevenness.
Moreover, since it is the structure which conveys the protection sheet 41 in the longitudinal direction as a strip | belt shape, it is not necessary to prepare the protection sheet of the same magnitude | size as a to-be-processed object, and to replace | exchange for every to-be-sewn material, It is possible to improve the economy by reducing the consumption amount, and to improve the productivity by eliminating the complexity of the replacement work.

Further, since the transport mechanism 40 intermittently transports the belt-like protective sheet 41 at a specified feed pitch for each advance / retreat operation of the drilling tool 2 by the advance / retreat mechanism, the transport mechanism 40 protects against the lowering of the drilling tool 2 each time. The drilling tool 2 can be lowered to an unused portion of the sheet 41, and it becomes possible to further reduce the influence of unevenness and realize better drilling.
Further, by appropriately selecting and setting the feed pitch, it is possible to further reduce the consumption of the protective sheet, and to further improve the economy and productivity.

  Moreover, since the guide groove 33 which lets the strip | belt-shaped protection sheet 41 pass is formed in the mounting surface of the mounting base 30 in the drilling apparatus 10, the shift | offset | difference of the protection sheet 41 by the influence of the impact of the drilling tool 2 is suppressed, and more The drilling tool 2 can be accurately lowered onto the protective sheet 41, and the workpiece is drilled, the tip of the drilling tool 2 is protected, and the noise is reduced by the direct collision between the drilling tool 2 and the cradle 31. Etc. can be realized more effectively.

  Moreover, since the drilling device 10 includes the holding frame 61 that holds the workpiece and the moving mechanism 60 that moves the holding frame 61 in a two-dimensional direction, the drilling processing can be accurately performed at an arbitrary position of the workpiece. Even when drilling is performed at a plurality of target positions, it can be performed continuously, and work efficiency can be improved.

Further, the drilling device 10 has an advancing / retreating mechanism that can exchange and hold the drilling tool 2 and the sewing needle, and can detach the cradle 31, and can be used as a knot mechanism that forms a seam by a sewing thread in cooperation with the sewing needle. Since the hook 3 is provided, it can be converted to a sewing machine by replacing the drilling tool 2 of the drilling device 10 with a sewing needle.
Conversely, it is possible to easily manufacture the drilling device 10 using the configuration of an existing sewing machine.

[Other drilling devices]
The drilling device 10 in FIG. 1 is configured to selectively realize the functions of the drilling device and the sewing machine by exchanging the drilling tool 2 and the sewing needle. However, the configuration of the sewing machine is separately added to the drilling device, and no parts are exchanged. Therefore, it is possible to adopt a configuration that realizes a function as a drilling device and a function as a sewing machine.

For example, as shown in FIG. 5, the drilling device main body 10A, a sewing machine 90A having a needle up-and-down moving mechanism, a holding frame 61A movable to an arbitrary position on the XY plane, its moving mechanism 60A, and A configuration including a drilling device 100 </ b> A including a supporting base 4 </ b> A to be supported may be employed.
The drilling device main body 10A of the drilling device 100A has a configuration obtained by removing all of the configuration (the shuttle, the balance, the thread tension, etc.) used as the sewing mechanism from the configuration of the drilling device 10 described above.
The sewing machine 90 </ b> A has a configuration in which the drilling tool 2 is replaced with a sewing needle, the cradle 31 is replaced with a needle plate, and the transport mechanism 40 and the protection sheet 41 are removed from the configuration of the drilling device 10 described above.
The drilling device main body 10A and the sewing machine 90A are supported by the support 4A in a state of being adjacent to each other, and the moving mechanism 60A moves the drilling position of the drilling tool 2 of the drilling device main body 10A and the needle drop by the sewing machine 90A within the movable range of the holding frame 61A. Position.

In the case of such a drilling device 100A, it is possible to perform sewing using the formed hole while performing drilling on the workpiece.
The control device of the drilling device 100A stores processing data storing a plurality of drilling positions for a workpiece, and synchronizes the drilling device main body 10A and the moving mechanism 60A during the processing operation, so that each drilling processing position is stored. Execute drilling processing.
Furthermore, the control device synchronizes the sewing machine 90A and the moving mechanism 60A, and performs sewing by performing needle dropping in order at each drilling position.

  As described above, the drilling device 100A includes the drilling device main body 10A and the sewing machine 90A, and moves the moving mechanism 60A within the movable range of the holding frame 61A to determine the drilling position of the drilling tool 2 of the drilling device main body 10A and the needle drop position by the sewing machine 90A. By arranging so as to include, it is possible to perform drilling and perform sewing using the drilling position.

[Others]
In the above-described drilling device 10, the case where the drilling tool 2 and the sewing needle are replaced and the function as a sewing machine can be realized is exemplified. However, with respect to the drilling device 10, all configurations used only with the sewing machine are removed. And you may comprise as an exclusive machine of a drilling apparatus.

Moreover, in the example of FIG. 4, although the case where the drilling tool 2 is conveyed by the arrangement | positioning which descends to the center part of the width direction of the protection sheet 41 was illustrated, it is the arrangement | positioning which the drilling tool 2 descends toward one side of the width direction. It may be conveyed.
In that case, it is desirable to provide a reel R and a winding mechanism for winding the protective sheet 41 in place of the collection box 47.
Accordingly, the reel R around which the used protective sheet 41 is wound is reattached to the mounting position of the reel R on the side where the protective sheet 41 is supplied onto the mounting table 30, so that the impression M of the used protective sheet 41 is obtained. The drilling tool 2 can be lowered to the half side in the width direction in which no is formed, and the protective sheet 41 can be used for a longer period of time.

2 Drilling tool 10, 100 A Drilling device 10 A Drilling device main body 20 Frame 30 Mounting base 31 Receiving base 33 Guide groove 34 Fitting recess 40 Conveying mechanism 41 Protective sheet 60, 60 A Moving mechanism 61, 61 A Holding frame 90 A Sewing machine M Indentation R Reel

Claims (6)

A drilling tool for drilling a workpiece;
A cradle for the drilling tool;
An advancing / retreating mechanism for moving the drilling tool forward and backward toward the cradle;
A band-shaped protective sheet arranged so as to pass through a drilling position of the drilling tool on the upper side of the cradle;
A punching device comprising: a transport mechanism that transports the belt-shaped protective sheet along a longitudinal direction thereof.   2. The punching device according to claim 1, wherein the transport mechanism intermittently transports the belt-shaped protective sheet at a specified feed pitch for one advance / retreat operation of the drilling tool by the advance / retreat mechanism. A mounting table for mounting the workpiece;
The drilling device according to claim 1, further comprising a guide groove through which the belt-shaped protective sheet is passed through the mounting surface of the mounting table. A holding frame for holding the workpiece;
The drilling device according to any one of claims 1 to 3, further comprising a moving mechanism that moves the holding frame in a two-dimensional direction. The advance / retreat mechanism can exchange and hold the drilling tool and the sewing needle,
The cradle is detachable,
The drilling device according to claim 4, further comprising a knot mechanism that forms a seam by a sewing thread in cooperation with the sewing needle. A sewing machine having a needle up-and-down movement mechanism that holds and holds the sewing needle and a knot mechanism that forms a seam by a sewing thread in cooperation with the sewing needle;
The drilling device according to claim 4, wherein the moving mechanism includes a drilling position by the drilling tool and a needle drop position by the sewing machine in a movable range of the holding frame.

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