JPH0568763A - Clamp plate processing device for automatic sewing machine - Google Patents

Abstract

PURPOSE:To keep a stable support condition by putting a rotary cutting tool held at a motor into/out of a tool insertion hole corresponding to vertical motion of the motor by rotary motion of the motor whole body so as to fix a rotation position of the motor. CONSTITUTION:A clamp plate is cut and worked by a work tool 14 protruding from under a work holding table 2, so a thrust from the work tool 14 is applied downward, and the clamp plate is pushed to the work holding table 2 to prevent it from fluttering. After a fastening member 17 for fixing a rotation position of a motor inside a motor holding body 9 is released, the motor 13 for holding the cutting tool 14 is rotated inside the motor holding body 9, and by changing a relative position of an engagement protrusion 17a of the motor 13 with the motor holding body 9, a vertical position of the motor 13 is changed as desired, so a protruding condition of the cutting tool 14 from the work holding table 2 can be changed easily. For removing the motor 13 from the motor holding body 9, the motor 13 is rotated after the fastening member 17 is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic sewing machine in which a work held by a clamp plate is moved by an XY drive mechanism in accordance with a predetermined sewing pattern.
The present invention relates to a clamp plate processing apparatus capable of processing a clamp plate of an automatic sewing machine on a work holding table of the automatic sewing machine.

[0002]

2. Description of the Related Art In an automatic sewing machine such as the one described above, at the time of sewing, the clamp X-
A desired sewing pattern was created by controlling the movement in the Y direction. Conventionally, this sewing pattern data is also used when forming a work holding groove having a shape capable of performing proper sewing by hollowing out a plate-shaped clamp material before processing slightly wider than the sewing pattern. However, after modifying the program to process the sewing pattern data into processing data, the clamp material is processed by XY movement control.

Further, as a cutting device for a clamp material, a rotary cutting tool (end mill) which is rotated by a motor held above a work holding table of an automatic sewing machine is attached, and the tool is moved from top to bottom. It is known that a clamp material placed on the work holding table is subjected to a work holding groove forming process.

[0004]

In the above-mentioned prior art, when the workpiece holding groove is machined in the clamp material,
During processing, the clamp material receives an upward thrust that is opposite to the downward direction of the processing direction from the processing tool. Therefore, when the processing tool is mounted above the work holding table, the thrust causes the clamp plate to be pulled upward, which causes a problem that the clamp plate flaps and its support becomes unstable.

The present invention has been made in view of the above problems, and provides a work processing apparatus in an automatic sewing machine which can perform a processing operation while maintaining a stable support state without fluttering a clamp material. With the goal.

[0006]

SUMMARY OF THE INVENTION According to the present invention, (a) a clamp plate formed with a work fitting groove into which a work to be sewn is fitted or a groove matching a sewing shape is formed in accordance with a predetermined movement pattern. In an automatic sewing machine configured to be moved along a work holding table by an XY drive mechanism, a cylindrical motor holding body fixed below the work holding table,
An engaging groove formed on the peripheral surface of the motor holding body from the lower end of the peripheral surface to a predetermined height position, a motor that can be fitted to the motor holding body, and a detachable unit on the rotating portion of the motor. A rotary cutting tool fixed to the motor, and an engaging projection protruding from the motor and capable of being engaged with and disengaged from the engaging groove. It is fixed by a member.

Further, in the above structure, (b) the motor may have a cooling fan, and an exhaust portion for exhausting the cooling air sent by the rotation of the fan to the upper portion of the motor may be formed.

[0008]

According to the present invention having the above-mentioned configuration (a), the clamp plate is cut by a working tool protruding from below the work holding table. For this reason, the thrust force that the clamp material receives from the processing tool during processing acts downward, and the clamp plate material is pressed against the work holding table, and its flapping is prevented.

Further, after the fastening member for fixing the rotational position of the motor in the motor holding body is released, the motor holding the cutting tool is rotated in the motor holding body,
The vertical position of the motor can be arbitrarily changed by changing the relative position of the engaging projection formed on the motor and the engaging groove formed on the motor holding body. The appearance state of the cutting tool can be easily changed.

When the tool to be used is replaced,
It is necessary to remove the motor holding it from the motor holder, but when removing the motor from the motor holder, after releasing the fastening member, the motor is rotated to engage the engaging projections. The work can be performed extremely easily by removing it from the lower end of the dowel groove, and conversely,
The motor mounting operation can also be easily performed by engaging the engaging projections with the engaging grooves.

Further, in the above-mentioned constitution (b), the air sent from the cooling fan of the motor is discharged from the discharge port of the motor holder. For this reason,
The chips that have entered between the motor and the motor holder during processing are discharged outward from the discharge port of the motor holder by the jet of air.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
It will be explained based on. In the figure, 1 is a sewing machine main body provided with a stitch forming mechanism that raises and lowers a sewing needle to form a stitch.
Is a work holding base fitted to the sewing machine bed provided in the sewing machine main body 1, and the upper surface thereof is located on the same plane as the needle plate 1a (see FIG. 3) provided on the sewing machine bed. Reference numeral 3 denotes an outer frame arm provided on the sewing machine main body 1, which is configured to move in both X and Y directions along the upper surface of the work holding table 2 by a well-known XY driving mechanism (not shown).

Reference numeral 4 is a rectangular outer frame for fixing the clamp plate material C (see FIG. 4). Protrusions 4a, 4a, 4b, 4b are formed on both sides of the outer frame 4, and a pair of protrusions (for example, 4a, 4a) facing each other are formed in the concave portion of the outer frame arm 3 (see FIG. It is adapted to be fitted to (not shown) and fixed to the outer frame arm 3.

Reference numerals 5 and 6 are a pair of upper guide plates fixed to the lower surface of the work holding table 2 with flat head screws 51 and 61,
They are arranged at a predetermined distance from each other. Reference numerals 7 and 8 denote a pair of lower guide plates fixed to the lower surfaces of the upper guide plates 5 and 6 with screws 71 and 81, respectively, and these lower guide plates 7 and 8 have projecting portions 7a projecting inward from each other. , 8a are formed, and a predetermined gap is formed between the upper surfaces of the projecting portions 7a, 8a and the lower surface of the work holding table 2.

Reference numeral 9 denotes a cylindrical motor holder, and a locking plate 10 is fixed to the head of the motor holding body. Both side parts of the locking plate 10 are formed on the lower surface of the holding table 2 and the projecting parts 7a, 8a. Between the lower guide plates 7 and 8
It is firmly fixed to the work holding table 2 by screwing. In addition, 9a and 10a are the motor holder 9
Through holes for tool insertion, which are formed in the central portion of the head of the head and the locking plate 10 and communicate with each other, 7a1 and 8a1 are the locking plate 1
This is a stopper for positioning when 0 is inserted.

An engagement groove 91 is formed on the peripheral surface of the motor holder 9 and is bent upward from the lower end of the peripheral surface. As shown in FIG. 5, the engagement groove 91 is
A first vertical portion 91a extending from the lower end of the motor holder 9 to the raised position P1 and a first horizontal portion 91b continuous with the first vertical portion 91a.
And a second vertical portion 91c formed from the first horizontal portion 91b to the lowered position P2, and an inclined portion 91d formed obliquely from the lowered position P2 to the raised position P3.
The second horizontal portion 91e is formed at the raised position.
Since FIG. 5 shows a part of the peripheral surface of the motor holder 9 in an expanded manner, only a single engagement groove is shown.
Actually, the engagement groove 91 is formed at two locations on the peripheral surface of the motor holder, which are symmetrical by 180 degrees.

On the other hand, 13 is a motor having an outer peripheral surface fitted to the inner surface of the motor holding body 9.
The rotary shaft 13a has a rotary cutting tool (end mill) 1
4 is detachably fixed. In addition, this motor 13
The two holding plates 15 and 16 facing each other are fixed to the peripheral surface of the holding plate 15 and 16 at predetermined intervals.
, Two bolts 17 and 18 are respectively screwed into positions 180 degrees symmetrical. Engaging projections 17a, 18a projecting from the holding plates 15, 16 to the motor 13 side are provided at one ends of the bolts 17, 18, respectively. The engaging projections 17a, 18a are formed in the engaging grooves 91, 18a. It is possible to engage with 91. Then, these engaging protrusions 17
a, 18a to the horizontal portions 91b of the engaging grooves 91, 91,
The motor 13 is held in the motor holding body 9 by engaging with 91e or the inclined portion 91d. It should be noted that annular steps 17b and 18b are formed on the respective engagement protrusions 17a and 18a.

Furthermore, one of the bolts 17 (fastening member) is composed of a long shaft screw for use as an operating lever, and an operating knob 17c is fixed to the other end. Then, by rotating the operation knob 17c and pressing the step portion 17b of the engaging projection 17a against the peripheral surface of the motor, the rotational position of the motor 13 with respect to the motor holder 9 can be fixed. .. In addition,
When the outer diameter of the motor 13 is smaller than the inner surface of the motor holding body 9, a collar is fixed to the motor 13 so that the motor with the collar is held in the motor holding body 9 and the engaging projection 17 is formed.
It is preferable that the step portion 17b of a is pressed against the peripheral surface of the collar.

Next, the operation will be described based on the above configuration.
When forming the work holding groove T1 penetrating the clamp plate T and the penetrating groove T2 matching the sewing shape as shown in FIGS. 6A and 6B, first, as shown in FIG. The clamp plate material T ′ (see FIG. 4) is fixed to the work piece 4 with screws or the like and placed on the work holding table 2. Next, the locking plate 10 is inserted between the projecting portions 7a, 8a of the lower guide plates 7, 8 and the work holding base 2 and fixed by the fixing screws 11, 12 to fix the motor holding body 9 Is attached to the lower surface of the work holding table 2.

After this, the engaging projections 17a and 18a provided on the motor 13 are fitted to the engaging grooves 9 formed on the motor holder 9.
The first vertical portions 91a and 91a are inserted from the lower end portions of the first and the first vertical portions 91 and 91a, and are moved to the lower end portions of the second vertical portions 91c and 91c through the first horizontal portions 91b and 91b. As a result, the motor 13 is held at the lowered position P2 by its own weight. At this time, the end mill 14 fixed to the motor 13 is in a state of being retracted from the work holding table 2 as shown in FIG.

Next, the outer frame arm 3 is moved by driving the XY drive mechanism, and the processing start position of the clamp plate material T'is positioned above the end mill 14. After that, the operator drives the motor 13 to start the rotation of the end mill 14, and at the same time, presses the bolt 17 as the operation lever to rotate the entire motor 13 in the A direction (see FIG. 5). As a result, the engagement protrusions 17a, 18 of the bolts 17, 18 are
a moves upward along the inclined portions 91d, 91d of the engagement grooves 91, 91, and accordingly, the motor 13 moves upward while rotating in the motor holding body 9 as described above. As the motor 13 rises, the end mill 14 moves through the through hole 10a in the central portion 9a and the work holding table 2
The clamp plate material is cut out by projecting from the tool insertion hole 2a formed in the above, and finally the clamp plate material T'is penetrated.

At this time, the thrust that the clamp plate material T'receives from the end mill 14 acts in the direction in which it is pressed onto the work holding table 2, that is, downward, so that the clamp plate material T'will not flutter and the machining operation will not be performed. It is performed stably and the processing accuracy is greatly improved.

Then, when the end mill 14 penetrates the clamp plate material T'and the amount of protrusion from the upper surface of the material reaches an appropriate amount, the height position of the end mill 14 is fixed.
That is, the position of the entire motor 13 in the rotation direction A with respect to the motor holder 9 is fixed. This fixing operation can be performed very easily by the operator rotating the operation knob 17c of the bolt 17 held and pressing the step portion 17b provided on the bolt 17 against the peripheral surface of the motor 13. ..

After fixing the height position of the end mill 14 in this way, the operator turns on the start switch of the sewing machine to start the driving of the XY drive mechanism, and the sewing pattern data and the end mill are started. Clamp plate material T'according to the predetermined machining pattern data calculated based on the distance y between the sewing needle N and the sewing needle N (see FIG. 3).
To move. As a result, a work fitting groove T1 that allows the work W to be sewn to be fitted without a gap and a groove T2 that matches the sewing shape are formed as shown in FIG.

After the processing operation of the clamp plate material T'is completed,
Stop driving the motor 13 and operate the bolt 17 1
7c is rotated to separate the step portion 17b from the motor holding body 9, and the motor 13 is rotatable with respect to the motor holding body 9. Then, by rotating the entire motor 13 in the B direction, the engaging protrusions 17a and 18a are moved to the processing position P2 along the inclined portion 91d of the engaging groove 91, and the motor 1
3 is moved downward and the end mill 14 is immersed (see FIG. 5).

When it becomes necessary to replace the end mill 14 due to wear of the blade portion or change of the cutting diameter, the motor 13 holding the end mill 14 is removed from the motor holder 9 and then the motor 13 is removed. Install a new end mill against. In this way, by removing the motor 13 itself and performing the replacement work of the end mill 14, the worker is not forced to perform a difficult work of inserting his / her hand into a narrow space, and the work is easy. It can be performed.

Further, even in the above-mentioned motor removal work, the worker holds the bolt 17 and rotates the motor 13 in the opposite manner to the above-described motor attachment,
Very easy to do. That is, in FIG. 5, the engagement protrusions 17a and 18 locked at the processing position P2.
a is the second vertical portion 91c, the first horizontal portion 91b, the first
Along the vertical portion 91a of the first vertical portion 91a
It can be removed from the lower end of the. As described above, since the motor 13 can be attached to and detached from the motor holder 9 very easily, the work of exchanging the end mill 14 is not complicated by this work, and the worker can perform the work efficiently. it can.

By the way, when cutting is performed from the lower surface of the clamp plate material T'as described above, the chips are
It may fall down along the end mill 14 and enter between the motor holding body 9 and the motor 13. If this is accumulated, it may hinder the driving of the motor 13 or the vertical movement of the motor 13. There is. Therefore, in this embodiment, the chips are automatically discharged from the inside of the motor holding body 9 by adopting the following configuration.

That is, the motor 13 used in this embodiment
Has a cooling fan 13b for cooling heat during driving, and discharges air sent by the cooling fan 13b on the upper surface of the motor 13
It is designed to be discharged from c. An exhaust port 9b is formed above the peripheral surface of the motor holder 9, and an exhaust pipe 20 is connected to the exhaust port 9b. An exhaust port 20a is formed on the upper surface of the exhaust pipe 20, while an opening 20b is formed on the lower surface. The chip discharge pipe 21 protruding downward is formed in the opening 20b.
Are connected. Further, the exhaust port 2 of the exhaust pipe 20
0a is closed by a filter 20c that prevents passage of chips, and a chip storage bag 22 is attached to the lower end of the chip discharge pipe 21.

With the above construction, the chips that have entered between the motor 13 and the motor holder 9 during cutting are discharged from the discharge port 9b of the motor holder 9 together with the air discharged from the motor 13. Delivered into tube 20,
From here, the air passes through the filter 20c and is discharged to the outside. The chips sent into the exhaust pipe 20 are
The filter 20c comes into contact with the filter 20c, drops downward, and is stored in the chip storage bag 22 through the chip discharge pipe 21.

As described above, in this embodiment, the chips that have entered the motor holder 9 are automatically discharged to the outside, and all of them are stored in the chip storage bag 22. Workers will not be scattered around,
It suffices to simply replace the chip storage bag 22 and the work can be performed efficiently.

In this embodiment, the exhaust pipe 20 is provided with the exhaust port 20a and the opening 20b. However, even if only the opening 20b is formed in the exhaust pipe and a net-like chip storage bag is attached thereto. Alternatively, a net-like chip storage bag may be directly attached to the discharge port 9b of the motor holder 9. Further, in the above-described embodiment, the two engaging grooves 91, 91 are provided on the motor holding body 9 at 180-degree symmetrical positions, but among these engaging grooves, the engaging protrusions 18a of the bolt 18 are engaged. The engagement groove 91 can be deleted. Of course, in this case, one bolt 18 is also deleted. Further, as for the shape of the engaging groove 91, any other shape can be used as long as it is formed from the lower end of the peripheral edge portion of the motor holding body 9 to the upper side thereof.
The present invention is not particularly limited to the above embodiment.

[0033]

As described above, in the clamp plate processing apparatus in the automatic sewing machine according to the present invention, the rotary cutting tool fixed to the motor is attached below the work holding table to perform the cutting process from the lower surface of the clamp plate. Therefore, the thrust in the direction in which the clamp plate is pressed against the work holding table acts on the clamp plate during machining, and the clamp plate is machined in a stable state without fluttering, and the machining accuracy can be greatly improved.

Further, the motor can be attached / detached to / from the work holding base very easily by engaging and disengaging the engaging projection formed on the motor with the engaging groove formed in the motor holder. Therefore, when replacing the rotary cutting tool,
The motor for holding the motor can be removed from the motor holder, and the worker can easily perform the work without being forced to work in a narrow space.

Further, the motor for forming the discharge port in the upper portion of the peripheral surface of the motor holder and for rotating the rotary cutting tool has a cooling fan and can discharge the air sent by the fan upward. In this case, the chips that enter between the motor and the motor holder during cutting can be automatically discharged to the outside, and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment according to the present invention.

FIG. 2 is a side view of what is shown in FIG.

FIG. 3 is an exploded perspective view of a main part of what is shown in FIG.

FIG. 4 is a perspective view showing an outer frame shown in FIG.

FIG. 5 is an operation explanatory view showing the relationship between the engagement projections and the engagement grooves and the height position of the end mill when the motor is rotationally moved in the embodiment.

FIG. 6 (a) is a perspective view showing a clamp plate and a work fitting groove into which a work to be sewn is fitted, and FIG. 6 (b) is a plan view showing a groove matching a sewing shape.

[Explanation of symbols]

 T Clamp plate T1 Work fitting groove 9 Motor holding body 9b Discharge port 91 Engagement groove 13 Motor 13a Rotating shaft (rotating portion) 13b Cooling fan 13c Discharging portion 14 End mill (rotary cutting tool) 17 Bolt (fastening) Member) 17a Engagement protrusion

Claims (2)

[Claims] 1. A clamp plate having a work fitting groove into which a work to be sewn is fitted or a groove conforming to a sewing shape is formed on a work holding table by an XY drive mechanism according to a predetermined movement pattern. In an automatic sewing machine configured to move along a line, a cylindrical motor holder that is fixed below the work holder and a peripheral surface of the motor holder that extends from a lower end of the peripheral surface to a predetermined height position. An engagement groove formed by a motor, a motor that can be fitted to the motor holder, a rotary cutting tool that is detachably fixed to a rotating portion of the motor, An engaging projection that can be engaged with and disengaged from the groove, and the engagement of the engaging projection with the engaging groove causes the motor to be held by the motor holding body and causes the entire motor to rotationally move within the motor holding body. By engaging the protrusion Move the motor up and down by changing the relative position with the engaging groove,
Along with the vertical movement, the rotary cutting tool held by the motor is moved in and out through the tool insertion hole formed in the motor holding table, while the rotation position of the motor in the motor holding body is fixed by a predetermined fastening member. A clamp plate processing device in an automatic sewing machine, which is characterized in that 2. The motor has a cooling fan, and is provided with an exhaust portion for exhausting air sent by the rotation of the fan to an upper portion of the motor. The motor holding body exhausts the air from the motor. The clamp plate processing device in the automatic sewing machine according to claim 1, wherein a discharge port for discharging air to the outside is formed.