JPH022291Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention regulates the relative movement distance between the first member and the second member so that the relative movement is within a predetermined distance. Relating to a regulating device that allows only

[Conventional technology]

As a conventional movement distance regulating device, there is one described, for example, in Japanese Utility Model Application Laid-Open No. 60-40277. This restricts the moving distance of the knife holder with respect to the body of the overlock sewing machine. That is,
The body and the female holder are connected by a rotating rod and a guide rod that extend in parallel and horizontal left and right directions, and this rotating rod has a male thread cut into one end so that it can rotate freely relative to the body. The female holder is fixedly installed in the axial direction, and the male screw is screwed into the female holder so that the female holder moves forward and backward with respect to the fuselage by rotation of the rotating rod, and one end of the guide rod is fixed to the female holder. The female holder is slidably fitted in the machine body in the axial direction, and is rotated by a knob while being guided by a guide rod, so that the female holder moves toward and away from the machine body (left and right). It is configured to advance and retreat. At this time, the guide rod that advances and retreats together with the female holder passes through the fuselage, and stoppers made of collars are fitted onto the guide rod on both the left and right sides of the fuselage, and one of these stoppers hits the fuselage side. This restricts further movement of the guide rod, and when the guide rod stops moving, the scalpel holder also stops together, thereby determining the limit of movement of the scalpel holder relative to the fuselage.

[Problem that the invention attempts to solve]

However, in such conventional travel distance regulating devices, the rotating rod and the guide rod are separated from each other, so even if one stopper hits the fuselage and the guide rod stops moving, the rotation rod and the guide rod continue to move. It is possible to further move the female holder by continuing to rotate the rotating rod. In this case, the threaded part of the female holder with the rotating rod moves, and the movement of the connecting part of the female holder with the guide rod stops. In addition, the knife holder may tilt, causing a discrepancy in the screw engagement between the rotary rod and the knife holder, causing so-called galling in the thread groove, which may impede the rotation of the rotary rod thereafter. There was a problem.

Particularly, when the stopper hits the aircraft body while the rotary rod is rotating vigorously, the rotary rod continues to rotate even after the hit, and the occurrence of the galling phenomenon becomes conspicuous.

Therefore, this invention was made by focusing on the above-mentioned conventional problems, and when the relative distance between the two members reaches a predetermined distance, the rotation of the rotating rod is forcibly stopped, and both members The purpose is to prevent them from being too close or too far apart.

[Means for solving problems]

In this invention, the rotary rod is provided with a protrusion that protrudes in a direction intersecting its axis, and the guide rod is provided with a protrusion receiver that receives the protrusion and suppresses rotation of the rotary rod. The receiver is disposed at a position where the first and second members are in contact with each other at the limit of relative movement of the first and second members that move relative to each other in the direction of contact and separation.

[Effect]

When the distance of relative movement between the first and second members reaches a limit, the projection hits the projection receiver and the rotation of the rotary rod is forcibly stopped. Therefore, as soon as the relative distance between the two members reaches the movement limit, the relative positions of the two members are fixed, and the relative distance cannot be changed any further. Therefore, since no relative inclination occurs between the two members, there will be no discrepancy in the screwed state between the rotary rod and the second member. Therefore, if the rotary rod is then rotated in the opposite direction, the relative movement of both members will start either toward or away from each other in the opposite direction.

〔Example〕

Next, this invention will be explained based on illustrated embodiments. This embodiment is an example in which this invention is applied to an overlock width adjusting device for an overlock sewing machine.

First, the overlock width adjusting device of the overlock sewing machine will be explained. Reference numeral 1 designates a throat plate, on the needle drop side thereof, a fixed claw 2 extending in the direction of cloth feeding direction A is provided, and a movable claw 3 oriented in the same direction is provided in parallel with the fixed claw 2. A projecting portion 3a extending toward the upper side of the fixed claw 2 is integrally provided on the upper part of the movable claw 3. The overhanging portion 3a covers the upper surface of the fixed claw 2 when the stitching width formed by the fixed claw 2 and the movable claw 3 is small, and covers the upper surface of the fixed claw 2 when the stitching width formed by the fixed claw 2 and the movable claw 3 is large.
and the movable claw 3. A mounting block 4 is integrally connected to the rear end of the movable claw 3, and a movable piece 6 is fixed to the mounting block 4 with a bolt 5.
It is locked by the nut 5a. of the moving piece 6;
A jaw portion 68 is formed at the lower end of the portion to which the movable claw 3 and the integral mounting block 4 are attached.

Furthermore, a finger hook 7 is integrally formed at the rear end of the movable piece 6. A hole 10 for positioning is provided in the lower part of the movable piece 6. The movable piece 6 is attached to the left side surface in the cloth feeding direction A of the female holder 11 which constitutes the second member of this invention. That is, the surface of the knife holder 11 is formed with an oblique guide groove (not shown) whose upper end is forward in the cloth feeding direction A and whose lower end is backward in the same direction A, and the movable piece 6 can move forward and backward in this guide groove. engage with.

Furthermore, a press plate 13 is arranged on the surface of the movable piece 6 opposite to the female holder 11. Presser plate 1
3 is fixed to the female holder 11 by bolts 14 and 15, and holds the movable piece 6 so that the movable piece 6 does not come off the guide groove. The presser plate 13 has
A leaf spring 17 is fixed by a bolt 16, a ball 19 is placed in a through hole 18, and the ball 19 is biased by the leaf spring 17 to press the ball 19 against the movable piece 6. The ball 19 engages with the hole 10 of the movable piece 6 when the movable piece 6 is raised, and positions the movable piece 6 at the raised position of the movable piece 6 (the use position of the movable claw 3 as described later).

A pin 51 is fixedly protruding from the movable piece 6 near the finger hook 7. The pin 51 projects leftward from the moving piece 6 in the cloth feeding direction A. At the tip of the pin 51, there is a sewing machine body 2, which is the first member of this invention.
8, a fixed plate 53 fixed with bolts 52 is provided, and a hole 54 is provided in the fixed plate 53 on the extension of the pin 51 when the movable piece 6 is in the raised position. A rear end edge 55 of the fixed plate 53 faces the extension of the fixing plate 51 . The length of the pin 51 is such that the pin 51 engages with the hole 54 or the rear end edge 55 when the overhanging portion 3a of the movable claw 3 overlaps the upper surface of the fixed claw 2, and When the projecting portion 3a is separated from the fixing claw 2, the pin 51 has a length such that it separates from the hole 54 or the rear end edge 55 to the right with respect to the cloth feeding direction A. Thus, when all or part of the projecting portion 3a overlaps the upper surface of the fixing claw 2, the pin 51 is engaged with the hole 54 or the rear end edge 55.

Further, the pin 5 is attached to the lower end of the presser plate 13.
An engagement receiving portion 66 is formed for engagement with 1. The engagement receiving portion 66 is such that when the movable claw 3 is in the use position, the pin 51 comes into contact with it from below to forcibly prevent the movable piece 6 from rising further. When engaged with the mating receiving portion 66, the ball 19 engages with the hole 10 of the movable piece 6, as described above, and the downward movement of the movable piece 6 is restrained by the urging force of the leaf spring 17.

Also on the right side of the knife holder 11 in the cloth feeding direction A.
Similar to the guide groove, the upper end is in the forward direction of cloth feeding direction A,
A mounting groove 20 having an approximately 45 degree inclination is formed with the lower end facing backward in the same direction A, and a lower knife 21 is inserted into this groove 20.
is engaged. The lower knife 21 is pressed and fixed in the mounting groove 20 by a knife holder 23 that is fixed to the knife holder 11 with a bolt 22 . At this time,
The right edge of the lower knife 21 and the right edge of the movable claw 3 are substantially on the same line in the cloth feeding direction A.

Further, on the upper side of the knife holder 11, a pointer 25 is attached by a bolt 24 in front of the position of a support means to be described later that supports the knife holder 11 on the sewing machine body 28.
is fixed, and the tip 25a of the pointer 25 faces the scale 26 of the needle plate 1. The scale 26 is displayed on a transparent transparent plate 27 formed on the needle plate 1, and the tip 25a of the pointer 25 faces the lower surface of the transparent plate 27 to indicate the scale 26 that indicates the current stitching width dimension. do.

A metal bush 3 serving as a bearing is installed in a horizontal hole 29 in the sewing machine body 28 that is perpendicular to the cloth feeding direction A.
0 is fixed with a bolt, inside the bushing 30,
A rotary rod 31 passes through it rotatably. A collar 33 is fixed to the left end of the rotating rod 31 in the cloth feeding direction A with a bolt 32 in contact with the left end surface of the bush 30.
On the right end surface of the bush 30 in the same direction A, the rotating rod 31
A retaining ring 34 is attached to the rotating rod 31 to prevent it from coming off. A male thread 35 is formed on the right side of the rotating rod 31 in the cloth feeding direction A from the bush 30, and is screwed into a female thread 36 of the female holder 11. A circular knob 37 is fixed to the right end of the rotating rod 31 on the right side of the female holder 11 with a bolt 38.
The surface of 7 is covered with a decorative board 39. The rotating rod 31 and the knob 37 are provided with concave and convex portions that fit into each other at their ends, so that the two always rotate together. A display 40 indicating the direction of rotation of the knob 37 is provided on the decorative board 39. Further, a compression coil spring 41 is fitted onto the rotary rod 31 between the knob 37 and the female holder 11 to constantly bias the female holder 11 to the left.

Further, in the sewing machine body 28, a guide rod 43 whose one end is fixed to the female holder 11 is passed through a hole 42 parallel to the hole 29. The guide rod 43 consists of a holding bolt 43a and a tubular support shaft 43b that fits inside the holding bolt 43a and is adjustable and held by the holding bolt 43a. Then, the thread groove 46 at the right end of the holding bolt 43a that holds the support shaft 43b is screwed into the female thread 47 of the female holder 11. Thus, female holder 1
1 is supported on the sewing machine body 28 by a rotary rod 31 and a guide rod 43.

In addition, 67 in the figure is a stopper piece fixed to the female holder 11 with the bolt 49, and the movable claw 3
Move the moving piece 6 to switch to the unused position.
When the movable piece 6 is lowered, a jaw portion 68 on the lower surface of the bent portion formed at the upper part of the movable piece 6 comes into contact with the stopper piece 67 to prevent the movable piece 6 and the movable claw 3 from moving excessively. Even if the movable piece 6 is moved with a strong force, the movable claw 3 does not come into contact with the engagement receiving part 66 and the stopper piece 67, so that both 3, 6
The installation condition is always maintained correctly.

Reference numeral 50 formed on the throat plate 1 is a knife receiving part formed by an inclined surface, and by fitting the lower knife 21 into the mounting groove 20 of the knife holder 11, the lower part of the tip of the blade of the lower knife 21 becomes the knife receiving part. 50, the lower knife 21 is supported from below by this knife receiving portion 50.

If the cloth feeding direction A is the forward direction, the overlocking width of the hem is determined by the width between the left side of the fixed claw 2 and the right side of the movable claw 3 in the use position. Therefore, by moving the movable claw 3 in the left-right direction, the stitching width can be adjusted. This overlocking width adjustment is performed by rotating the knob 37. The overlocking width formed using the fixed claw 2 and the movable claw 3 can be adjusted between 2.5 mm and 5.0 mm.

Therefore, when the knob 37 is rotated in either direction, the rotary rod 31 rotates together with the knob 37, and the female holder 11, which is screwed into the threaded groove 35 of the rotary rod 31, moves to the left or right. Rotating rod 31
The retaining ring 34 and the collar 33 allow only rotational movement without axial movement. Then,
A rotating rod 31 that performs only rotational movement and its thread groove 3
5 and the female holder 11 screwed into the knob 3.
The rotational force of 7 is converted into a force for advancing and retracting the knife holder 11. Further, due to the movement of the knife holder 11, the guide rod 43 moves integrally with the knife holder 11 while passing through the sewing machine body 28.

Due to the movement of the knife holder 11, the movable piece 6 also moves to the left and right, so the movable claw 3 also moves in the same way, so that the stitching width can be adjusted. At this time, the pointer 25 also moves together with the knife holder 11, and the stitching width at that time is displayed on the scale 26.

Furthermore, since the lower knife 21 also moves together with the movement of the knife holder 11, the lower knife 21
1 and the movable claw 3 do not change. Accordingly, the cutting position of the cloth also changes in accordance with the change in the stitching width.

Note that it is also possible to overedge using only the fixed claw 2 without using the movable claw 3. Since this is an edge stitching based only on the width dimension of the fixed claw 2, the edge stitching is extremely narrow. At this time, the movable claw 3 is moved backward and downward to a non-use position. In this movement, first, by moving the moving claw 3 to the right, the projecting piece 3a is separated from the upper surface of the fixed claw 2.
This is done by moving the scalpel holder 11 to the right by rotating the knob 37 as described above.

As a result, the tip of the pin 51 of the movable piece 6 escapes from the hole 54 of the fixed plate 53, so that the movable piece 6 can freely move forward and backward. Therefore, the moving piece 6 is moved downward by hooking a finger on the finger hook 7 of the moving piece 6 and pulling it down. Then, the movable piece 6 descends along the guide groove, and the jaw 68 to which the mounting block 4 integral with the movable claw 3 is fixed comes into contact with the stopper piece 67, where the movable piece 6 and the movable claw 3 stops descending. Therefore, the movable claw 3 is also lowered together with the movable piece 6 to a non-use position.

Here, when performing the extremely fine overlocking, the knife holder 11 is moved to the left end by rotating the knob 37, and the lower knife 21 is brought closest to the throat plate 1. Thereby, the cloth cutting position is on the same line as the right edge of the fixed claw 2, making the overlock stitch extremely thin. Similarly, with the movable claw 3 in the unused position, the female holder 11 is rotated by rotating the knob 37.
When is moved to the right from the time of the ultra-fine hem stitching, although the stitching width is extremely thin, the cutting width of the cloth becomes wider, so that the fabric wraps around the fixed claw 2 and the hem is sewn. be done. This is the so-called overlock stitch. Thus, according to this embodiment, in addition to being able to adjust the overlock width, it is also possible to perform overlock stitching simply by rotating the knob 37 and moving the movable piece 6.

In order to return the movable claw 3 to the use position, the tip of the pin 51 is moved away from the hole 54 and the rear edge 55 to the right, and the finger hook 7 is pushed up.
As a result, the movable piece 6, the mounting block 4, and the movable claw 3 rise to the above-mentioned use position. At this time,
When the position of use is reached, the hole 10 of the moving piece 6 is aligned with the ball 1.
9, and the ball 19 falls into the hole 10, while the pin 51, which is the first engaging part 65, touches the presser plate 1.
3, and comes into contact with the engagement receiving portion 66 of No. 3.

In this embodiment, the overlock width adjusting device of the overlock sewing machine described above is known, for example, in Japanese Utility Model Application No. 60-40277.

In this embodiment, the rotating rod 3
1, the protrusion 8 is fixed via a collar 33 fixed thereto. This protrusion 8 is made of a pin, and its protruding direction is perpendicular to the axis of the rotating rod 31. Further, a collar 45 is fixed to the guide rod 43 with bolts 44. This collar 45 is located in a position where its circumferential surface is close to the collar 33 of the rotating rod 31, and a circumferential groove 45 is formed on the circumferential surface.
a is formed, and flanges 9 and 12 forming the protrusion receiver of this invention are formed on both sides thereof.
Therefore, in this embodiment, two protrusion receivers are arranged.

Thus, the movement of the protrusion 8 in the axial direction of the rotary rod 31 and the guide rod 43 is immovable like the sewing machine body 28, which is the first member of this invention, and the movement of the collar 45 is the same as the movement of the collar 45, which is the second member of this invention. Since it is integrated with the knife holder 11, which is a component, the sewing machine body 2
As the female holder 11 moves relative to the collar 8, the collar 45 moves relative to the collar 33 in the axial direction. In the set movement range of the knife holder 11 (that is, the adjustment range of the overlocking width formed by the fixed claw 2 and the movable claw 3), the protrusion 8
is configured to pass through the circumferential groove 45a and turn, and when the movement limit at both ends of this range is reached, the protrusion 8 engages with the circumferential surface of either flange 9 or 12, and the rotation of the rotary rod 31 is stopped. It is set to be stopped. A stepped portion 12a is formed on the circumferential surface of the flange 12 at a position far from the circumferential groove 45a.

When the knife holder 11 is moved left and right as the stitching width is adjusted, the protrusion 8 rotates together with the rotary rod 31, and the collar 45 moves left or right. When the female holder 11 reaches its movement limit, the flange 9 of the collar 45,
12 enters the orbit of the protrusion 8,
When the protrusion 8 engages with this, the rotation of the rotary rod 31 is forcibly stopped. In this way, since the rotation of the rotary rod 31 for moving the knife holder 11 is stopped, the movement of the knife holder 11 is also stopped, and as a result, the stitching width formed by the fixed claw 2 and the movable claw 3 is either the maximum or the minimum. Therefore, the position of the scalpel holder 11 does not move beyond this movement limit. Therefore, the female holder 11 can always move from side to side while maintaining the same posture, and therefore, the so-called so-called problem between the male thread 35 of the rotary rod 31 and the female thread 36 of the female holder 11 due to a discrepancy in their engagement. No more galling.

In this embodiment, the protrusion 8 is provided at one location in the axial direction of the rotary rod 31, and the guide rod 43 is provided with flanges 9 and 12 at two locations that serve as protrusion receivers, so that the movement of the female holder 11 is prevented. The protrusion 8 is designed to engage with either of the flanges at both the left and right ends of the range, but the guide rod 43 has only one flange, and the rotation rod 31 has only one flange. Even with a structure in which one protrusion is provided on each side (two protrusions in total), the same effect as described above can be obtained because one of the protrusions will come into contact with the peripheral surface of the flange at both ends of the movement range. Also, these examples are
Although the movement of the scalpel holder 11 is stopped at both ends of the movement range of the scalpel holder 11, in order to stop the movement of the scalpel holder 11 at one limit of the movement range, it is sufficient to have one flange and one protrusion. . Further, in the embodiment described above, this invention is applied to an overlock width adjusting device of an overlock sewing machine, but various types of members may be used as the first and second members as long as they are two members that approach and separate from each other. Needless to say, it can be applied.

[Effect of idea]

As explained above, according to this invention, the first
When the distance of relative movement of the second member reaches a limit, the projection hits the projection receiver and the rotation of the rotary rod is forcibly stopped. Since the rotary rod is used to move the two members relative to each other, when the rotation of the rod stops, the relative movement stops immediately. Therefore, as soon as the relative distance between the two members reaches the movement limit, the relative positions of the two members are fixed, and the relative distance cannot be changed any further. Therefore,
Since no relative inclination occurs between the two members, there will be no discrepancy in the screwed state between the rotary rod and the second member, and so-called galling of the screws will be eliminated. Therefore, since the rotary rod can always rotate smoothly, there is an effect that the relative movement of both members can be performed smoothly at all times.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of this invention, FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIG. 3 is an exploded perspective view of the embodiment. 8... Protrusion, 9, 12... Flange (protrusion receiver), 11... Female holder (second member), 28...
... Sewing machine body (first member), 31 ... Rotating rod,
43... Guide rod.

Claims (1)

[Scope of utility model registration request] The first member and the second member are connected by a rotating rod and a guide rod that are parallel to each other. The guide rod is installed to be rotatable and fixed in the axial direction, and the male screw is screwed into the second member, and the guide rod is fixed to the second member and has an axis attached to the first member. In a relative movement device, the first and second members are fitted so as to be slidable in the direction, and are configured so that the first and second members are guided by a guide rod and move toward and away from each other relative to each other by rotation of the rotating rod. , the rotary rod is provided with a protrusion that protrudes in a direction intersecting the axis thereof, and the guide rod is provided with a protrusion receiver that receives the protrusion and suppresses rotation of the rotary rod, and the protrusion and the protrusion receiver are arranged. , the first and second
A movement distance regulating device characterized in that the device is disposed at a position where the two members come into contact with each other at the relative movement limit of the two members.