JPH0328238B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a fabric material feeding device for an industrial sewing machine.

<Conventional technology and its problems> In general, industrial sewing machines need to sew the fabric material of clothing in a high-density and fine manner, or to sew it relatively roughly. In technology, it is customary to change the speed at which fabric material is fed into the needle of a sewing machine by rotating a motor at variable speeds.

Therefore, it is not possible to easily obtain various minute changes in the quick-on speed, and it is necessary to use a special, rather expensive motor with a transmission, which can easily cause operational troubles. There is.

In particular, since the sewing pattern described above varies depending on the size, shape, thickness, etc. of the fabric material, a feeding means that relies on variable speed rotation of a motor naturally has its limits and is inferior in adaptability.

<Means for Solving the Problems> The present invention is intended to improve such problems, and for this purpose, the present invention has a structure that includes an installation frame on the work floor, and a frame that is mounted and fixed on the top plate of the installation frame. A sewing machine, a material presser mechanism which is also installed on the top plate and which can be moved up and down in order to press or release the material to be sewn by the sewing machine against the top plate; A slide follower is assembled and connected to the presser mechanism from below the top plate, and the slide follower is connected linearly so as to be able to slide integrally with the presser mechanism in order to feed the workpiece to the sewing operation position. The slide driven body is equipped with a drive mechanism also installed below the top plate for reciprocating motion, and a slide plate that slides the slide follower along the guide rail of the installation frame, and a plurality of slide plates fixed in parallel on the slide plate. The piston rod is formed of two forward-acting air cylinders, one backward-acting air cylinder, and an engager held at the lower end of a piston rod hanging from each cylinder, and a plurality of the piston rods are connected to corresponding electromagnetic control valves. The drive mechanism for the slide follower is configured to have a plurality of rotating drive shafts for reciprocating the slide follower parallel to the guide rail, and one rotary drive shaft also parallel to the slide follower. It is formed from a rotary drive shaft for reciprocating the slide driven body, a drive motor common to the two kinds of rotary drive shafts, and a transmission timing belt that rotates the two kinds of rotary drive shafts at a constant speed in the same direction. On the outer circumferential surface of each of the forward rotation drive shafts, several types of spiral grooves with different leads are carved in a form in which the spirals continue in one direction. The outer circumferential surface of the forward rotary drive shaft is provided with one type of helical concave groove with an even lead, the helix of which is similar to that of the helical concave groove of the forward rotary drive shaft. The reeds are carved in a form that continues in the opposite direction and are all longer than the reeds of the spiral concave groove, and the reciprocating piston rods are lowered one by one to position the engager to the corresponding position. When the helical groove of the forward rotary drive shaft is selectively engaged, the slide driven body and the material holding mechanism automatically move as the engaged forward rotary drive shaft rotates at a constant speed. By performing an endlessly variable forward movement according to the lead of the spiral concave groove on the rotary drive shaft,
When the fabric material is fed into the sewing position of the sewing machine, the double-acting piston rod is also lowered, and its engager is engaged with the corresponding spiral groove of the double-acting rotary drive shaft. As the rotary drive shaft rotates at a constant speed, the slide follower and the material holding mechanism automatically perform a quick-returning backward motion according to the lead of the spiral groove on the rotary drive shaft. It is characterized in that the relationship is set so that it waits at a position in preparation for the subsequent feeding of dough materials.

<Example> Hereinafter, the specific configuration of the present invention will be described in detail based on the illustrated example. This frame includes a sewing machine 10 for sewing fabric material M (for example, fabric for forming pockets of clothes), a fabric material presser mechanism D for pressing the material M onto the top plate 11 of the installation frame F, and a fabric material presser D for pressing the material M onto the top plate 11 of the installation frame F. A slide driven body A that moves the entire presser mechanism D forward in order to feed and pass through a sewing needle (not shown) of the sewing machine 10, and a drive that moves the slide driven body A reciprocating linearly in the front and back direction. A mechanism B and a cutting mechanism C that cuts the material M after sewing to a certain size are incorporated.

First, the sewing machine 10 is attached to the top plate 11 of the installation frame F.
Needless to say, the sewing needle is mounted and fixed on the top, and is equipped with a sewing needle that is linearly moved up and down at a constant speed using the motor 12 as a driving source. Since the sewing machine 10 itself including the sewing needle is well known, the position where the needle acts on sewing the fabric material M will only be indicated by the reference numeral Y-Y in the figure, and detailed explanation of its structure and operation will be given. Although omitted, the material M is fed forward and passed over the top plate 11 by the sewing needle as indicated by the arrow P in Figs. 1, 4, and 5, and is subjected to the required sewing action in the transition process. become.

After the sewing operation is completed, the material M is cut into a certain size by the cutting mechanism C. As shown in Figures 6 and 7, the cutting mechanism C consists of a pantograph mechanism that is moved up and down by an air cylinder (not shown).
It is installed inside the installation frame F at a position directly below the installation frame F. 13 is placed on the elevating tool rest 14 which forms part of the pantograph mechanism,
It is a cutter installed detachably and replaceably, and in conjunction with the presser plate and presser ruler of the presser mechanism D that presses the material M onto the top plate 11 from above, it presses the material M onto the top plate in a fixed state. It is designed to be cut from the bottom of 11.

Next, the material holding mechanism D as a whole, including the dough holding plate 15, its swing arm 16, cylinder mounting support 17, etc., faces onto the top plate 11 of the installation frame F, and is located inside the framework of the installation frame F. By assembling and connecting with the slide driven body A installed in
It is designed to be able to linearly reciprocate in the above-mentioned front-back direction integrally with the main body.

As is clear from FIGS. 2 and 3, the fabric presser plate 15 and the swing arm 16 of the presser mechanism D are arranged in pairs on the left and right, and are kept at a constant interval so as not to interfere with the sewing action of the material M by the sewing needle. In a parallel state, all of them extend long and parallel in the front-rear direction, and are connected and fixed in a continuous state via a plurality of rivets, screws 20, etc. so that they can operate integrally with each other.

In that case, the swinging arm 16 extends the upright piece of the L-shaped dough holding plate 15 forward, so to speak, and in the middle of the extension, a horizontal pivot pin 21 is attached to the corresponding pair of left and right cylinder mounting columns 17. It is installed so that it can see-saw.

The cylinder mounting support 17 has an inverted L-shape as shown in FIG.
Similarly, an air cylinder 22 for raising and lowering the dough pressing plate 15 is fixedly installed on the flat upper part.

That is, in FIGS. 1 and 4, the front end of the swing arm 16 is raised, and the material M is moved onto the top plate by the dough presser plate 15 that has been lowered around the pivot pin 21.
1, but when the front end of the swinging arm 16 is lowered from this state by the piston rod of the cylinder 22, the fabric presser moves as shown by the chain line in FIG. 1 and in FIG. 5. Board 1
5, conversely, the top plate 1 is centered around the pivot pin 21.
1 and release the pressing force of the material M, thereby making it possible to bite into the material M next time.

Between the fabric presser plates 15 facing each other,
A pair of inverted T-shaped fabric presser foot rulers 23 located at the front and rear of the sewing machine 10 across the sewing operation position Y-Y are also faced from above, and the pair of presser foot rulers 23 are always kept parallel to the top plate 11. Although it is designed to be raised and lowered at the same time, the raising and lowering mechanism constructed on the top plate 11 is not shown.

As described above, when the material M is cut by the cutter 13, the material M is pressed from above by the dough presser plate 15 and the presser ruler 23 and is in a fixed state.

The connecting spacer stand 18 functions as a spacer to connect and integrate the cylinder mounting column 17 of the material holding mechanism D and the slide plate 19 of the slide follower A, and is generally made of H-shaped steel.

The cylinder mounting column 17, the swinging arm 16, the dough presser plate 15, and the presser ruler 23 are supported by the spacer base 18 so as to face the material M through the opening gap (not shown) in the top plate 11.
As is clear from FIG. 2, the sewing machine 10 in the installation frame F is located at a biased position toward the sewing operation position Y-Y, whereas the slide plate 19 of the slide follower A is At a mid-height position inside the frame F,
Moreover, it extends horizontally in the left-right direction so as to cross the frame F, and from this point on, the pair of left and right end support legs 24 and the intermediate support leg 25 interposed between them are integrally suspended. There is. however,
A plurality of the support legs 24, 25 as a whole
Of course, it is also possible to connect them individually.

Reference numeral 26 denotes a pair of front and rear support bars that are fixed horizontally at a mid-height position within the installation frame F, and 27 is a plurality of support bars (total 3 in the figure) that are also installed in a horizontally fixed state along the front and rear direction of the frame F. This is a slide guide rail, and both ends thereof are supported by support bars 26. The support leg 2 of the slide plate 19 in the slide driven body A is
4 and 25 are slidably passed through the guide rail 27, and are linearly reciprocated in the front-rear direction by a drive mechanism B, which will be described below.

Therefore, as long as the slide plate 19 can be guided linearly, a guide rail 27 with a round shaft as shown in the figure is used.
Instead of penetrating the support legs 24 and 25 of the slide board 19, the support legs 24 and 25 and the guide rail 27 may be fitted into a so-called concave-convex fit, or the support legs 24 and 25 may be inserted only onto the guide rail 27. It may also be a form in which it is simply placed.

The drive mechanism B of the slide driven body A includes a plurality of forward rotational drive shafts 28a, 28b, 28c (total 3 in the figure) that move the middle slide plate 19 of the driven body A forward in the direction of the arrow P. , one rotary drive shaft 29 for backward motion that similarly moves the slide plate 19 backward, and two types of rotary drive shafts 28
a, 28b, 28c, and 29 in the same direction, and a timing belt 31 for transmission that similarly rotates all rotational drive shafts 28a, 28b, 28c, and 29 in synchronization. Shafts 28a, 28b, 28c, 2
The rotary motion of the slide plate 9 is converted into the linear motion of the slide plate 19.

That is, full rotation drive shafts 28a, 28b, 28c,
29 extends along the front and back direction of the installation frame F in parallel with the slide guide rail 27, and both front and rear ends thereof connect the bearing 32 to the support bar 26 of the installation frame F. They are rotatably supported through the slide plate 19, and the middle portions thereof are loosely penetrated by the intermediate support legs 25 of the slide plate 19, respectively.

In addition, the full rotation drive shafts 28a, 28b, 28
A timing pulley 33 is fixedly installed at the front end of each of the motors 29 and 29, and a timing belt 31 suspended between this pulley 33 and an output pulley 34 of a motor 30 drives the entire rotation of the pulley 33. The shafts 28a, 28b, 28c, and 29 are rotated together in the same direction at a constant speed. 35
is an idle roller for guiding the rotation of the timing belt 31.

Further, full rotation drive shafts 28a, 28b, 28c,
When referring to each of the 29 items, first, the fabric material M
A plurality of forward rotary drive shafts 28a, 28b, which move the slide plate 19 forward in the direction of arrow P in order to feed the sewing machine 10 to the sewing action position Y-Y.
28c, as extracted in FIGS. 8a, b, and c, has several different types (three types in the figure) of spiral grooves 36 for each of the leads L1, L2, and L3 on its outer peripheral surface.
a, 36b, and 36c are respectively engraved in a continuous form facing one direction (forward direction) f of the spiral, and the straight line of the slide plate 19 is determined according to the length difference of the leads L1, L2, and L3. The speed of the sliding movement is changed so that the fabric material M can be sewn roughly or finely, and can be adjusted and changed.

Moreover, the spiral grooves 36a, 36b, 36c
are adjacent forward rotation drive shafts 28a, 28b, 2
8c as well, the leads L1 and L
2, L3 has been changed in length to various lengths.

In other words, as is clear from the comparison of FIG.
a, 36b, and 36c themselves have three different types of leads L1, L2, and L3;
The length dimensions of the leads L1, L2, and L3 of each type are varied between the spiral grooves 36a, 36b, and 36c of the adjacent rotary drive shafts 28a, 28b, and 28c. It is set so that the sewing form can be easily changed depending on the type of fabric material M.

In that case, in the figure, there are three types of spiral grooves 36a, 36 corresponding to the length differences of the leads L1, L2, L3.
b and 36c are shown, but the number of types of spiral grooves 36a, 36b, and 36c can be further increased or decreased depending on the desired sewing form of the fabric material M. Further, although the number of types is set to be the same between the spiral grooves 36a, 36b, 36c of the adjacent rotary drive shafts 28a, 28b, 28c, this number can also be varied.

Furthermore, although the carving depth H of the various spiral grooves 36a, 36b, and 36c is shown to be uniform among the several types, the carving depth H can also be varied between the several types. Therefore, by changing both the engraving depth H and the leads L1, L2, and L3, it is possible to obtain even more various speed change motions of the slide plate 19. In order to obtain the speed change motion, the adjacent rotary drive shafts 28a, 28
It is also conceivable to change the thickness of b and 28c individually. The opening shapes of the spiral grooves 36a, 36b, and 36c are also not limited to the arcuate cross-sections as shown in the figures.

On the other hand, in order to feed the next dough material M forward, a spiral concave groove 37 is also carved on the outer peripheral surface of the rotary drive shaft 29 that once moves the slide plate 19 back to the rear, as shown in FIG. However, the lead L of the spiral concave groove 37 is connected to the forward rotation drive shaft 28.
Spiral grooves 36a, 3 in a, 28b, 28c
6b, 36c longest leads L1, L2, L3
Moreover, the spiral groove 37 is engraved as a uniform type that does not change in length over the entire spiral groove 37.

Further, the directionality of the spiral is used for the backward movement of the slide plate 29, so that the above-mentioned forward movement rotary drive shafts 28a, 28
It is set in a continuous form pointing in the direction r opposite to that of b and 28c, so that the slide plate 19 can be moved rearward at a high speed like a so-called quick return.

Furthermore, 38a, 38b, 38c, 39 are a plurality of forward rotation drive shafts 28a, 28b, 28c and 1
This is an air cylinder for forward motion and for backward motion corresponding to the rotary drive shaft 29 for backward motion of the book, and the second, eleventh,
As is clear from FIG. 13, they are fixedly installed in parallel on the slide board 19. 40a, 40
b, 40c, 41 are the air cylinders 38
a, 38b, 38c, and 39 respectively rotate drive shafts 2
8a, 28b, 28c, 29, each of which has a ball holding case 42a, 42b, 42c, 43 at its lower end.
is screwed on.

The holding cases 42a, 42b, 42c, 43
are assembled in a vertical U-shape in cross section, and ball-shaped engagers 44a, 44b, 44c, 45 that can freely roll and are held inside are exposed from their holding cases 42a, 42b, 42c, 43. In the circular arc surface, the rotational drive shafts 28a, 28b,
28c, 29 spiral grooves 36a, 36b, 36
c, 37, respectively, so as to be able to engage and disengage freely.

The engagers 44a, 44b, 44c, 45 are
Although it is possible to set this in a non-ball form that does not roll, by making it into a ball form as shown in the figure, the above-mentioned engagement action can be made smoother, and uneven wear with the spiral grooves 36a, 36b, and 36c can be prevented. can also be effectively prevented. 46a, 46
b, 46c, 47 are respective holding cases 42a, 42
42c, 43, and always applies a constant back pressure to the engaging elements 44a, 44b, 44c, 45.

Then, the plurality of forward rotation drive shafts 28
A, 28b, and 28c are used for the forward movement of the slide plate 19, and one arbitrary rotational drive shaft 29 is used for the return movement of the slide plate 19 due to the relationship with the sewing pattern for the fabric material M. It has come to be controlled so that it moves.

That is, 48a, 48b, 48c, 49 are electromagnetic control valves attached to the installation frame F, and the full rotation drive shafts 28a, 28b, 28
The air cylinder 38 corresponding to c, 29
a, 38b, 38c, 39, and the cylinders 38a, 38b, 38c, 3
As is clear from FIGS. 10 and 11, when the slide plate 19 moves forward, by supplying and discharging air to and from 9, the spiral groove 36a of any one forward rotation drive shaft 28a corresponds to this. The engaging element 44a at the lower end of the piston rod 40a is engaged, and the remaining two forward rotary drive shafts 28b, 28c and the spiral grooves 36b, 3 of the backward rotary drive shaft 29 are engaged.
6c, 37, and engaging elements 44b, 4 that similarly engage.
4c and 45 are both released.

Also, when the slide plate 19 moves back, the 12th and 13th
As shown in the figure, the engaging element 45 at the lower end of the corresponding piston rod 41 is engaged only with the spiral groove 37 of the reciprocating rotary drive shaft 29.

<Function> According to the above configuration, the drive motor 30 rotates all the rotation drive shafts 28a, 28b, 28c, and 29 in the same direction at a constant speed via the timing belt 31, and the electromagnetic control Valves 48a, 48b, 48c, and 49 control air supply and discharge to and from cylinders 38a, 38b, 38c, and 39, and any one spiral concave groove 36a, 36b is formed on the forward rotary drive shaft 28a, 28b, and 28c. , 36c, and the corresponding engagers 44a, 44 on the slide board 19 side.
By selectively engaging the engagers 44a, 44b, 44c, the leads L formed on the rotary drive shafts 28a, 28b, 28c
1, L2, and L3 are used for rolling motion in several different types of spiral concave grooves 36a, 36b, and 36c, and the middle slide plate 19 of the slide follower A is moved along its guide rail 27 in the direction of the arrow P. In other words, the dough material M on the top plate 11 can be moved linearly by itself in a continuously variable manner, and the material holding mechanism D also moves linearly in the same direction in an integrated manner.
can be fed into the sewing position Y-Y of the sewing machine 10, and the material M can be roughly or finely sewn into the desired shape using the sewing needle.

As mentioned above, after the sewing operation is finished, the cutter 13 of the cutting mechanism C cuts the fabric material M into a predetermined size. The corresponding engager 45 on the slide plate 19 side is engaged with the spiral concave groove 37 of the rotary drive shaft 29 for double action, and the engager 45 for double action is uniformly spread over the entire lead L. Rolling in the spiral groove 37,
The slide driven body A also linearly moves rearward along the guide rail 27 in a so-called quick return manner, and integrally with this, the material holding mechanism D also moves linearly on the top plate 11, so that the subsequent dough material M is It will quickly return to the feeding preparation position and stand by.

At the end position of the backward movement, the dough holding plate 15 of the material holding mechanism D described above is floated from the top plate 11 as shown in FIG. As is clear from FIG. 4, during the above-mentioned forward movement, the dough presser plate 15 descends and presses the dough material M, of course.
The interlocking operation between the material holding mechanism D and the slide driven body A and the cutting action of the fabric material M attached thereto are all position-detected by sensors (not shown) and are automatically and electrically controlled. That will happen. Then, according to the change in the sewing form for the fabric material M, the plurality of forward rotational drive shafts 28a, 2
8b and 28c are the electromagnetic control valves 4
Stinging is selectively controlled by 8a, 48b, and 48c.

<Effects of the Invention> As described above, in the present invention, the installation frame F on the work floor is used as a fabric material feeding device for an industrial sewing machine.
, a sewing machine 10 mounted and fixed on the top plate 11 of the installation frame F, and a sewing machine 10 also installed on the top plate 11 in order to press or release the fabric material M to be sewn by the sewing machine 10 against the top plate 11. A material presser mechanism D that can be moved up and down, and a material presser mechanism D that can slide integrally with the presser mechanism D, in order to feed the material M pressed against the top plate 11 to the sewing operation position Y-Y of the sewing machine 10. , the slide follower A is assembled and connected to the presser mechanism D from below the top plate 11.
and a drive mechanism B also installed below the top plate 11 in order to linearly reciprocate the slide driven body A, and the slide driven body A is moved along the guide rail 27 of the installation frame F. A sliding slide plate 19 and a plurality of reciprocating air cylinders 38a, 38 fixed in parallel on the slide plate 19.
b, 38c, one double-acting air cylinder 39, and each cylinder 38a, 38b, 38
Piston rod 40a, 4 hanging from c, 39
The piston rods 40a, 40b, 40c,
41 can be selectively moved up and down by corresponding electromagnetic control valves 48a, 48b, 48c, and 49, and the drive mechanism B of the slide follower A is controlled by its guide. A plurality of rotational drive shafts 28a, 28b, 28c for forward movement of the slide driven body parallel to the rail 27, one rotational drive shaft 29 for backward movement of the slide driven body parallel to the rail 27, and two types of rotational drive shafts 28a, 28.
Drive motor 30 common to b, 28c, 29
Similarly, two types of rotary drive shafts 28a, 28b, 2
8c and 29 are formed from a transmission timing belt 31 that rotates them at a constant speed in the same direction, and their forward rotational drive shafts 28a, 28b, 28.
Several types of spiral concave grooves 36a, 36b, 36 are formed on the outer peripheral surface of c for each lead L1, L2, L3.
c is carved so that its spiral continues in one direction f, and its leads L1, L2,
L3 is the full forward rotational drive shaft 28a, 28b, 28
The lead L is also applied to the outer circumferential surface of the double-acting rotary drive shaft 29.
One type of helical groove 37 is formed in such a manner that its spiral continues in the direction r opposite to that of the spiral grooves 36a, 36b, 36c in the forward rotary drive shafts 28a, 28b, 28c, and Leads L1 of grooves 36a, 36b, 36b,
The leads L are all longer than L2 and L3, and the piston rods 40a, 40b, 4 for forward movement are
0c is lowered one by one, and the engaging elements 44a, 44b, 44c are alternatively connected to the corresponding spiral grooves 36a, 36b, 36c of the forward rotary drive shafts 28a, 28b, 28c. When engaged, the engaged forward rotation drive shaft 28
As the slide followers A, 28b, and 28c rotate at a constant speed, the slide follower A and the material holding mechanism D automatically move the leads L1, L2,
By performing an endlessly variable forward motion according to L3,
The fabric material M is sewn at the sewing action position Y- of the sewing machine 10.
When the reciprocating piston rod 41 is lowered and its engager 45 is engaged with the spiral concave groove 37 of the corresponding reciprocating rotary drive shaft 29, the rotary drive shaft 29 Similarly, as the slide driven body A and the material holding mechanism D rotate at a constant speed,
Naturally, the spiral groove 37 in the rotational drive shaft 29
The relationship is set so that the system performs a quick return operation according to the lead L of the machine and waits for the next feed preparation position for the fabric material M, so the problems of the prior art described at the beginning can be avoided. There is an effect that can be improved.

That is, if the forward rotational drive shafts 28a, 28b, 28c in the drive mechanism B of the slide driven body A are rotationally driven by the common motor 30, the outer peripheral surface of each rotational drive shaft 28a, 28b, 28c is Engraved spiral grooves 36a, 36b, 3
6c leads L1, L2, L3, the slide driven body A and the material holding mechanism D integrated therewith are
automatically moves linearly at continuously variable speed, and the top plate 1
1, the fabric material M is fed to the sewing position Y-Y of the sewing machine 10, so there is no need to use the drive motor 30 as an expensive special product with a transmission to rotate it at variable speeds. There is no need to worry about causing any of the above problems.

In particular, the forward rotation drive shafts 28a, 28b, 28
There are multiple leads L on the outer peripheral surface of each c.
Several types of spiral grooves 36 with different numbers 1, L2, and L3
a, 36b, and 36c are engraved, and the leads L1, L2, and L3 are also changed differently between the adjacent rotary drive shafts 28a, 28b, and 28c. Therefore, during the sewing operation, the stitching pattern can be changed very easily in a continuously variable manner, such as coarsely or finely sewn, depending on the size, shape, thickness, etc. of the fabric material M. It has excellent responsiveness to various changes.

On the other hand, the spiral concave groove 37 of the double-acting rotary drive shaft 29
, the spiral is the forward rotational drive shaft 28a, 28
The spiral grooves 36a, 36 in b, 28c
Although it has a continuous form going in the opposite direction (returning direction) r to that of b and 36c, the lead L is of one type, and the spiral concave groove 36 on the forward rotation drive shafts 28a, 28b, 28c
Since the leads L1, L2, and L3 of leads a, 36b, and 36c are carved longer than the leads L1, L2, and L3 of leads L1, L2, and L3 of leads L1, L2, and L3 of leads L1, L2, and L3 of leads L1, L2, and L3 of lead a, 36b, and 36c, when these are driven to rotate, the slide driven body A and the material holding mechanism D always move linearly in a fast return manner. Therefore, the return after the sewing operation described above can be quickly performed, and the work efficiency can be significantly improved.

In addition, a plurality of forward rotation drive shafts 28a, 28
Spiral grooves 36a, 36 carved in b, 28c
b, 36c have a continuous spiral in the same direction f, while the spiral concave groove 37 in the reciprocating rotary drive shaft 29 has a continuous spiral in the opposite direction r. Because there are
The two types of rotational drive shafts 28a, 28b, 28c,
29 are transmission-connected by the timing belt 31 and rotated in the same direction by a common motor 30, it is possible to perform the quick return operation in the same way as for the various forward movements of the slide follower A and the material holding mechanism D. As a result, the drive mechanism B can be significantly simplified and rationalized, and can be installed below the top plate 11 in the installation frame F in a space-saving manner.

Furthermore, a plurality of forward rotation drive shafts 28a, 28
A plurality of air cylinders 38a, 38b, 38c,
39 and its piston rods 40a, 40b, 4
0c, 41 and engaging elements 44a, 44b, 44
c, 45 are installed in parallel, and the engager 44
a, 44b, 44c, 45, the slide driven body A is selectively engaged with the full rotation drive shafts 28a, 28b, 28c, and
Since the selective switching control can be performed by the electromagnetic control valves 48a, 48b, 48c, and 49, there is also the effect that automation can be achieved as a material feeding device for an industrial sewing machine. .

[Brief explanation of the drawing]

FIG. 1 is an overall schematic side view of the dough material feeding device according to the present invention, FIG. 2 is a front view thereof, FIG.
The figure is a schematic side view showing the state of the slide driven body reaching the forward end point and backward end point, respectively. Figure 6 is a side view showing the cutting mechanism extracted. Figure 7 is also a front view. Figure 8 a, b, and c are side views showing a plurality of extracted rotary drive shafts for forward motion, FIG. 9 is a side view showing extracted rotational drive shafts for backward motion, and FIG.
The figure is a side view of the slide driven body in the forward motion state, cut away along the line X-X in Figure 2, and No. 11.
The figure is an enlarged cross-sectional view along the XI-XI line in Figure 10.
2 and 13 are a partially cutaway side view and an enlarged cross-sectional view, respectively, showing the sliding follower in a backward motion state corresponding to FIGS. 10 and 11. A... Slide driven body, B... Drive mechanism, C... Cutting mechanism, D... Material holding mechanism, F... Installation frame, M
...Fabric material, L, L1, L2, L3...Lead, 1
0... Sewing machine, 19... Slide board, 28a, 28
b, 28c, 29... Rotation drive shaft, 30... Motor, 36a, 36b, 36c, 37... Spiral groove,
38a, 38b, 38c, 39... Air cylinder, 40a, 40b, 40c, 41... Piston rod, 42a, 42b, 42c, 43... Ball holding case, 44a, 44b, 44c, 45... Engagement element, 46a, 46b, 46c, 47...Spring, 48
a, 48b, 48c, 49... valve.

Claims (1)

[Claims] 1. An installation frame F on a work floor, and a sewing machine 1 mounted and fixed on a top plate 11 of the installation frame F.
0 and the fabric material M to be sewn by the sewing machine 10 is pressed against or released from the top plate 11. In order to feed the pressed material M to the sewing position Y-Y of the sewing machine 10, it is assembled and connected to the presser mechanism D from below the top plate 11 so that it can slide integrally with the presser mechanism D. The slide driven body A is provided with a drive mechanism B also installed below the top plate 11 in order to linearly reciprocate the slide driven body A, and the slide driven body A is guided by the installation frame F. A slide board 19 that slides along the rail 27, and a plurality of forward air cylinders 38a, 38 fixed in parallel on the slide board 19.
b, 38c, one forward air cylinder 39, and each cylinder 38a, 38b, 38
Piston rod 40a, 4 hanging from c, 39
The piston rods 40a, 40b, 40c,
41 can be selectively moved up and down by corresponding electromagnetic control valves 48a, 48b, 48c, and 49, and the drive mechanism B of the slide follower A is controlled by its guide. A plurality of rotational drive shafts 28a, 28b, 28c for forward movement of the slide driven body parallel to the rail 27, one rotational drive shaft 29 for backward movement of the slide driven body parallel to the rail 27, and two types of rotational drive shafts 28a, 28.
Drive motor 30 common to b, 28c, 29
Similarly, two types of rotary drive shafts 28a, 28b, 2
8c and 29 are formed from a transmission timing belt 31 that rotates them at a constant speed in the same direction, and their forward rotational drive shafts 28a, 28b, 28.
Several types of spiral grooves 36a, 36b, 36 with different leads L1, L2, L3 are formed on the outer peripheral surface of c.
c is carved so that its spiral continues in one direction f, and its leads L1, L2,
L3 is the full forward rotational drive shaft 28a, 28b, 28
The lead L is also applied to the outer circumferential surface of the double-acting rotary drive shaft 29.
One type of helical groove 37 is formed in such a manner that its spiral continues in the direction r opposite to that of the spiral grooves 36a, 36b, 36c in the forward rotary drive shafts 28a, 28b, 28c, and Leads L1 of grooves 36a, 36b, 36c,
The leads L are all longer than L2 and L3, and the piston rods 40a, 40b, 4 for forward movement are
0c is lowered one by one, and the engaging elements 44a, 44b, 44c are alternatively connected to the corresponding spiral grooves 36a, 36b, 36c of the forward rotary drive shafts 28a, 28b, 28c. When engaged, the engaged forward rotation drive shaft 28
As the slide followers A, 28b, and 28c rotate at a constant speed, the slide follower A and the material holding mechanism D automatically move the leads L1, L2,
By performing an endlessly variable forward motion according to L3,
The fabric material M is sewn at the sewing action position Y- of the sewing machine 10.
When the reciprocating piston rod 41 is lowered and its engager 45 is engaged with the spiral groove 37 of the corresponding reciprocating rotary drive shaft 29, the rotary drive shaft 29 Similarly, as the slide driven body A and the material holding mechanism D rotate at a constant speed,
Naturally, the spiral groove 37 in the rotational drive shaft 29
A fabric material feeding device for an industrial sewing machine, characterized in that the fabric material feed device for an industrial sewing machine is configured to perform a quick return operation in accordance with a lead L of the machine and standby at a feeding preparation position for the subsequent fabric material M. 2 Plural engagers 44a, 44b, 44c, 45
are each held in the form of a freely rolling ball at the lower ends of the piston rods 40a, 40b, 40c, 41, and each of the engaging elements 44a, 44b, 44c, 45 has a spiral groove 36a, 36b, 36c, 37. Spring 46a, 46b, 4 which should buffer the engagement action with
A fabric material feeding device for an industrial sewing machine as set forth in claim 1, characterized in that back pressure is applied by means 6c and 47. 3 Multiple forward rotational drive shafts 28a, 28b,
Each spiral groove 36a, 36b, 36 in 28c
The engraving depth H of c is determined by its leads L1, L2, L3.
A fabric material feeding device for an industrial sewing machine according to claim 1, characterized in that the depth is varied between several different types. 4. Fabric material feed for an industrial sewing machine according to claim 1, characterized in that the thickness of the forward rotary drive shafts 28a, 28b, 28c is varied for each of the plurality of shafts. Device.