JPS6237563Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a device for converting the amount of cloth feed in a cycle sewing machine.

[Prior art]

First, the outline of the cloth feeding device of a cycle sewing machine is shown in FIG. 1. 1 holds the needle 2 at the lower end,
A needle bar supported by a machine frame (not shown) of the sewing machine so as to be able to move up and down, 3 is a throat plate formed on the upper surface of the bed 4, 5 is a feed plate mounted on the upper surface of the throat plate 3, 6
A feed base is movably supported near the center right inside the bed 4, and the right end of the feed plate 5 and the base 7b of the presser arm 7 are mounted so as to be interlocked with each other. The presser arm 7 is equipped with a presser foot 7a movable up and down, which, together with the feed plate 5, clamps the fabric to be sewn, at the tip that extends largely to the left.

Next, FIG. 2 shows a driving device for the feed base 6, the feed plate 5, and the presser arm 7, and a conventional feed amount conversion mechanism.

Reference numeral 10 denotes a cloth feeding cam which is rotatably supported on the machine frame below the bed 4, and has a second cam groove 10a and a first cam groove 10 of a desired shape on the front and back surfaces, respectively.
b is engraved. The cloth feeding cam 10 is
The needle 2 rotates at a reduced speed in synchronization with the vertical movement of the needle 2 via a gear (not shown) that is linked to the main shaft (not shown) of the sewing machine.

Reference numeral 11 denotes a first driven arm rotatably supported on a fixed shaft 12 supported on a machine frame near the cloth feed cam 10, and a first cam groove 10 is provided at the tip of one arm 11a.
The arm 11 has a roller 11k that fits into the arm 11b.
A first sliding long groove 11m is carved in the other arm 11b, which is approximately L-shaped.

Reference numeral 13 denotes a swinging arm in the Y direction, and the tip of one arm 13a is slidably fitted into a guide slot 6n (see Fig. 1) drilled at a predetermined position in the feed base 6. , and is equipped with a rotatable square piece 14,
The other passive arm 13b, which is substantially L-shaped with the arm 13a, is provided with a long hole 13n for fixing an adjustment screw 15 for changing the feed rate of the cloth to be sewn. The Y-direction swinging arm 13 is connected to the cloth feed cam 10.
It is rotatably supported on the machine frame above.

The adjustment screw 15 has a threaded portion 15r formed at its upper end and rotatably holds a square piece 16 at its lower end, and the square piece 16 is slidably fitted into the first sliding groove 11m. At the same time, it is loosely fitted into the elongated hole 13n, and the passive arm 13b is clamped and fixed at a desired location by the washer 17 and nut 18. (See Figure 3) Next, 21 is a second driven arm rotatably attached to a fixed shaft 22 supported on the machine frame near the cloth feed cam 10. It has a roller 21k that fits into the second cam groove 10a, and
A second sliding groove 21m is carved in the other arm 21b, which is substantially L-shaped with the arm 21a.

Reference numeral 23 denotes an X-direction swinging arm rotatably supported by a fixed shaft 24 supported on the machine frame above the cloth feed cam 10, and a long hole 23n facing the long groove 21m is located at the center of the passive arm 23u. It is perforated in the section, and
The tip end is equipped with a pin 25 that engages with the base end of the feed base 6. Then, the Y direction swing arm 13
Similarly to the configuration in which the X-direction swing arm 23 and the second driven arm 21 are connected to each other, the X-direction swing arm 23 and the second driven arm 21 are rotatably connected to each other by another adjustment screw 15.

Since the structure is as described above, the cloth feed cam 10
When rotates, the roller 11k is guided by the first cam groove 10b, and the first driven arm 11 swings about the fixed shaft 12, and is fixed at a desired location in the elongated hole 13n of the Y-direction swinging arm 13. A certain adjustment screw 15 is connected to the square piece 1.
Since the swing arm 13 is swinged while sliding the feed base 6 in the first long sliding groove 11m, the feed base 6 is moved in the Y direction via the square piece 16.

On the other hand, since the roller 21k is guided by the second cam groove 10a, the second driven arm 21 can swing the X-direction swinging arm 23 about the fixed shaft 24 via another adjustment screw 15, as described above. In order to move the feed base 6, the pin 25 moves the feed base 6 in the X direction.

As mentioned above, since the feed base 6 moves in the X-Y direction in conjunction with the vertical movement of the needle 2, the feed plate 5 and the presser foot mounted on the base 6 and holding the fabric to be sewn are The presser foot 7a also moves in the X-Y direction and cooperates with the needle 2 to form a predetermined sewing pattern on the cloth to be sewn.

Now, in order to enlarge or reduce the sewing pattern, loosen the nut 18 and tighten the adjusting screw 15 on the swing arms 13, 23.
The swing range of the square piece 14 and the pin 25 can be expanded or reduced by moving the passive arms 13b, 23b within the elongated holes 13n, 23n and fixing them again at desired locations.

However, in such conventional feed rate conversion mechanisms, the adjustment screw is fixed with a nut, which not only requires a separate tool, but also requires the adjustment screw to be located in a narrow space below the sewing machine bed. Because of this, it was difficult to attach tools such as spanners for loosening the nuts, and there was insufficient room to rotate the spanners, resulting in poor workability and inability to operate reliably.

[Purpose of invention]

This invention was made with attention to the above-mentioned problems, and the purpose of this invention is to provide a feed amount conversion device that can easily adjust the feed amount by installing a device using gears. There is.

〔Example〕

An embodiment of this invention will be described below with reference to FIG. 3 and subsequent figures. Note that the same members as in the conventional example are designated by the same reference numerals, and their explanations will be omitted.

First, I will explain the configuration.

Reference numeral 33 denotes a Y-direction swinging arm, which has a protruding plate 33t provided on the side surface of the passive arm 13b of the Y-direction swinging arm 13, and has upper and lower surfaces at the tip of the protruding plate 33t. A fulcrum pin 33p that protrudes from the fulcrum pin 33p is provided through the fulcrum pin 33p, and the other parts have the same structure as the Y-direction swing arm 13. A substrate 34 has a long hole 34n fitted into the fulcrum pin 33p, extends along the lower surface of the passive arm 33b to the opposite side of the protruding plate 33t, and has an L-shaped rising portion 34t.
At the rising portion 34t, it is sandwiched between a worm support plate 35 and a worm support plate 35 connected by pins. The worm support plate 35 is a flat plate with a substantially L-shaped plane, and has an elongated hole 35n that fits the fulcrum pin 33p in one elongated end, and a screw of the adjustment screw 15 in the curved part. A long hole (not shown) is bored through the portion 15r. In addition, a knob 36 is attached to a pair of bearings 35j that are provided upright at the other end.
A worm 37 having a worm 37 is installed in a direction crossing the passive arm 33b. 38 is the threaded portion 15
This is a worm wheel that is screwed into r and meshes with the worm 37.

Next, we will explain how to use it.

As shown in FIG. 4, the worm wheel 38 is rotated via the worm 37 by operating the knob 36, and the adjustment screw 15 is fixed at a desired position in the elongated hole 33n of the passive arm 33b to set the cloth feeding position in the Y direction. Set.

If you want to change the fabric feed amount, use knob 3.
6 in the opposite direction to loosen the adjustment screw 15, and then move the knob 36 to the right or left, the fulcrum pin 33
The worm support plate 35 and the board 34 rotate together while sliding through the elongated holes 35n and 34n with p as the axis, and at the same time the adjustment screw 15 also moves within the first sliding elongated groove 11m, so that the rising part of the board 14 Comparing the pointer 14s attached to the needle 14t with the scale 33m engraved on the surface of the passive arm 33b, the adjusting screw 15 is again fixed at a desired location in the elongated hole 33n by operating the knob 36.

Regarding the feed amount conversion in the X direction, the X direction swinging arm 23 is formed with a protruding plate 43t on the passive arm 43u in almost the same way as the Y direction swinging arm 33, and the fulcrum pin 43 is
By providing an X-direction swinging arm 43 with a penetrating point P extending therethrough to form a feed amount converting device similar to that described above, and operating the knob 36, the X-direction feed amount can be converted as desired.

In this embodiment, the worm 37 and the worm wheel 38 are used as gears for fixing the position of the adjustment screw 15, but in other embodiments,
A bevel gear may also be used.

[Effect of idea]

As explained above, in this invention, in order to fix the adjustment screw that determines the amount of cloth feed in the cloth feed drive device to the passive arm of the swing arm, a screw is inserted into the threaded part of the adjustment screw into the shaft hole. Since the adjustment screw is screwed into the gear with a engraved part, it is not only easy to fix the adjustment screw using the knob that operates the gear, but also prevents loosening. This has the advantage of being excellent in workability and ensuring reliable fixing.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an outline of the cloth feed device of a cycle sewing machine, Fig. 2 is a perspective view showing the main parts of the cloth feed drive device and a conventional feed rate conversion mechanism, and Fig. 3 is a perspective view showing the outline of the cloth feed device of the cycle sewing machine. A perspective view showing the main parts of Y direction feeding,
FIG. 4 is a perspective view of the entire feed rate converting device. 5... Feeding plate, 6... Feeding base, 7... Presser arm, 15... Adjustment screw, 33... Y direction swinging arm,
33b... Passive arm, 35... Worm support plate, 3
6... Knob, 37... Worm, 38... Worm wheel, 43... X direction swinging arm, 43u...
...Passive arm.

Claims (1)

[Scope of utility model registration request] In the cloth feed drive device of a cycle sewing machine, a gear support plate provided with a gear having a knob is placed on the passive arm of the swinging arm that drives the feed base on which the feed plate and presser arm are mounted, and the gear support plate is provided with a gear having a knob. A feed amount converting device for a cycle sewing machine, characterized in that a meshing gear is screwed into an adjustment screw that determines cloth feed, and the adjustment screw is fixed to a passive arm.