JPH06312080A - Lifting table mechanism of multi-head sewing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an elevating type table mechanism of a multi-head sewing machine capable of reliably holding the table regardless of whether the table is in a raised position or a lowered position. A guide support mechanism allows the table to be moved between a raised position and a lowered position, and at the raised position, the guide mechanism allows the table to slide between a use position and a liftable position. In the use position, the rear end of the table can be supported by the table support plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table lifting mechanism for a multi-head sewing machine, and more particularly to a lifting table mechanism for a multi-head sewing machine that can reliably hold a table in a raised position.

[0002]

2. Description of the Related Art Conventionally, a multi-head sewing machine having a plurality of sewing machine arm portions has been put to practical use. In this multi-head sewing machine, a plurality of single-head sewing machines are arranged on the upper surface of the base frame at predetermined intervals, and the same embroidery pattern can be simultaneously formed on a planar work cloth of the number corresponding to the number of these single-head sewing machines. As described above, a movable frame for mounting a plurality of flat frames for holding these work cloths is mounted on the operation table. This movable frame is driven in the X-axis direction via the X-axis drive mechanism,
It is configured to be driven in the Y-axis direction via a Y-axis drive mechanism.

By the way, in this type of multi-head sewing machine, a cap frame for embroidering a curved cap can be mounted on the cylinder bed instead of the flat frame used for forming an embroidery pattern on a flat work cloth. Is configured. In this case, in order to mount the hat frame on the cylinder bed, a predetermined distance is set from the position when the operation table is mounted on the flat frame (hereinafter, referred to as a raised position) through a pair of left and right lifting guide mechanisms provided on the base frame. An elevating table mechanism is provided so as to hold it at a position (hereinafter, referred to as a descending position) in which the table is lowered.

In a general lifting type table mechanism, the work table in the lowered position can be securely held because it can be placed on the upper surface of the base frame, but the work table in the raised position can be lifted up and down at the rear end. Since it cannot support the part, only the front end is supported by the base frame through the engaging means only at two left and right positions, regardless of the length, so that it cannot be reliably held. .

Therefore, when the work table is in the raised position and the work cloth moves on the work table during the embroidery work, the work table vibrates, causing a sewing failure or a flat frame. There was a problem that it was difficult to stretch the work cloth. Therefore, the present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a multi-headed structure capable of reliably holding the work table regardless of whether the work table is in a raised position or a lowered position. An object of the present invention is to provide a lifting type table mechanism of a sewing machine.

[0005]

In order to achieve the above object, a lifting table mechanism for a multi-head sewing machine according to claim 1 is a multi-head sewing machine provided with a common lifting table for a plurality of sewing machines. The upper surface of the table is at the same level as the upper surfaces of the bed portions of the plurality of sewing machines, or
A continuous or discontinuous rear end support portion that supports the rear end portion of the table when in a raised position and a guide that guides and supports the table so that the table can be moved up and down relative to the base frame. A support mechanism, a table support plate provided on an upper end of the guide support mechanism to support a table, a use position in which the table is mounted on the table support plate, and a rear end portion of the table is mounted on a rear end support portion; And a guide mechanism that guides the front end of the rear end support portion so as to be slidable in the front-rear direction over the ascendable and descendable position.

According to a second aspect of the elevation table mechanism of the multi-head sewing machine, a plurality of horizontal pins are fitted on the rear end surface of the table and in a plurality of pin holes in the rear end side wall of the rear end support. The member is provided so as to project.

[0007]

In the elevator table mechanism of the multi-head sewing machine according to the first aspect, since the guide support mechanism for guiding the table so as to be able to move up and down with respect to the base frame is provided, the table is supported via the guide support mechanism. Can be switched between a raised position which is horizontally positioned at substantially the same height as the bed portion of the sewing machine and a horizontal lowered position which is lowered a predetermined distance from this raised position. In addition, it can slide between a use position where the rear end of the table is placed on the rear end support part with respect to a table support plate provided on the upper end of the guide support mechanism, and a liftable position where the rear end part is removed to the front side. Since a guide mechanism for guiding the table is provided, the table can be slid between a vertically movable position and a use position. Further, in the use position, the rear end of the table is continuously or discontinuously supported by the rear end support portion, so that the table is reliably supported. In this way, by supporting the table on the table support plate, it is possible to switch between the ascending position and the descending position via the guide supporting mechanism, and when the table is in the ascending position, it is possible to ascend and descend via the guide supporting mechanism. Since the position and the rear end of the table can be slid to the use position supported by the rear end support through the guide mechanism, the table in the raised position can be reliably supported.

If a plurality of pin members projecting from the rear end surface of the table are fitted into pin holes formed in the rear end support portion, the rear end of the table can be supported. It becomes even more certain.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a multi-head embroidery machine equipped with three embroidery sewing machines. This multi-head embroidery machine will be described. As shown in FIGS. 1 and 2, the multi-head embroidery machine M includes a flat surface having a predetermined length in the left-right direction on the rear side of the upper surface of the base frame 1 extending in the left-right direction. A sewing machine support plate 2 having a rectangular shape is disposed, and three embroidery sewing machines MH are arranged in a row in the left-right direction at predetermined intervals on the sewing machine support plate 2. These embroidery sewing machines MH
A needle bar case 4 in which twelve needle bars (not shown) are mounted is mounted on the head of the arm portion 3, and the needle bar for forming an embroidery pattern with an embroidery thread of a desired color is selected. It is configured to be selectable.

On the other hand, the bed 6 at the lower end of the pillar 5 connected to the arm 3 is mounted on the sewing machine support plate 2, and the cylinder bed 7 extends forward from the front end of the bed 6 A thread wheel stimulator (not shown) is provided at the tip of the bed 7, and a stitch is formed on the work cloth with an embroidery thread of a desired color in cooperation with a sewing needle attached to a selected needle bar. It Here, an upper shaft (not shown) for moving the needle bar or the balance 8 up and down and a lower shaft (not shown) for rotating the thread promoting device.
Is driven by a drive shaft that is rotationally driven by a V-belt 9 that is connected to a sewing machine motor (not shown).

Further, a work table 10 is disposed on the front side of the sewing machine support plate 2 so as to be substantially level with the upper surface of the cylinder bed 7, and the work table 10 is included.
A movable frame 13, which is rectangular in plan view and extends in the left-right direction, is placed over the auxiliary tables 11 and 12 provided on both left and right sides of the work table 10. Then, the drive frame portion 13a at the right end of the movable frame 13 is moved and driven in the X axis direction (horizontal direction) by an X axis drive mechanism (not shown), and the drive frame portion 13b at the left end thereof (in the front-back direction). ) Is moved and driven in the Y-axis direction by a Y-axis drive mechanism (not shown). Therefore, the movable frame 13 can move on the XY plane. A table support plate 14 is arranged at the center of the lower surface of the work table 10. The table support plate 14 is configured to be supported by a lift guide support mechanism 20 described later and to move up and down.

Next, a pair of left and right elevating guide supporting mechanisms 20 which can switch the working table 10 between a raised position and a lowered position will be described with reference to FIGS. A table support plate 14 is disposed in the center of the lower surface of the work table 10. At the left and right ends of the table support plate 1, there are C-shaped channels 21 extending in the vertical direction, the upper ends of which are open inward. It is fixed in place. By the way, since the two guide support mechanisms 20 have the same structure, the right guide support mechanism 20 will be described. The C-type channel 21
The slider 23 of the sliding guide 22 is provided on the right end face of the lower end of the
Is fastened with screws, and a slide rail 24 is slidably fitted onto the slider 23 via balls 24a. The slide rail 24 is attached to an attachment member 25 fixed to the base frame 1 and having a substantially L-shape in plan view. Has been.
On the other hand, a pair of left and right gas cylinders 26 for urging the work table 10 upward and a pair of left and right coil springs 27 for urging the work table 10 downward are provided, and the upper ends of the respective gas cylinders 26 are the table support plates. The left and right sides of the base frame 14 are pivotally attached, and the lower end portion is pivotally attached to the lower end portion of the base frame 1. The urging forces of the gas cylinder 26 and the coil spring 27 are adjusted so as to be balanced between the raised position and the lowered position, and the work table 10 is held between the raised position and the lowered position. Therefore, the hands of the worker and the work cloth are placed on the work table 10.
The work table 10 is moved up and down from the stop position with a slight force without being sandwiched between the work table 10 and the base frame 1.

Next, the work table 10 in the raised position is moved to the work table 10 by the lifting guide support mechanism 20.
A position supported by a table rear end support mechanism 40, which will be described later, from a position for raising and lowering (corresponding to an ascending / descending position of the present invention. This position is referred to as an ascending / descending position hereinafter) shown in FIG. The slide guide mechanism 30 for sliding the table support plate 14 in the front-rear direction until the table is used will be described. As shown in FIGS. 5, 7, 9 and 10, the slide guide moving mechanism 30 is provided with guide plates 34 for supporting the left and right sides of the table support plate 14 on the lower surface of the work table 10. A pair of guide edges 32a extending linearly in the front-rear direction of a notch 32 formed at a position corresponding to the sewing machine arm 3 of 14 are guided to slide the work table 14 in the front-rear direction. . Further, a pin member 33 is provided on the lower surface side of the work table 10, and the elongated hole 3 into which the pin member 33 is fitted is inserted.
1 is formed. Then, the work table 10 is mounted on the table support plate 14, and the pin member 33 is mounted on the table support plate 1.
The guide plate 34 is fitted into the long hole 31 formed in
Is placed with its side edge abutting the guide edge 32a of the table support plate. Therefore, in the operation table 10, the slide range in the front-rear direction is regulated by the elongated hole 31 provided in the table support plate 14, and the lateral swing is regulated by the elongated hole 31 and the guide edge 32a, while the work table 10 is controlled. Is slid in the front-rear direction from the ascendable / descendable position to the use position. By the way, the work table 10 and the table support plate 14 are connected to the slide guide mechanism 3 by a connecting screw 35 engaged from the lower surface of the table support plate 14.
It is integrated when 0 is not used. Also, the work table 10
A pair of handles 36 is provided on the lower surface of the. Further, a slider 37 is provided at the rear end of the work table 10 at a predetermined interval to facilitate sliding movement of the work table 10.

Next, the rear end support mechanism 40 of the table will be described. As shown in FIGS. 5 to 10, at the rear portion of the upper surface of the base frame 1, a table rear end support member 41 extending over the entire length in the left-right direction is arranged. The table rear end support member 41 has a standing plate portion 41b standing upright on a rear edge of a horizontal table rear end support portion 41a on which a rear end portion of the work table 10 is placed, and a front plate 41a on the base frame 1. A mounting portion 41c to be mounted is continuously provided. The standing plate portion 41a is formed with a pin hole 44 into which a pin member 43 protruding from the rear end surface of the work table 10 at a predetermined interval is fitted. Therefore, the work table 1 in the raised position
0 is easily slid backward by the slider 37 from the ascendable / descendable position to the use position via the slide guide mechanism 40, and the rear end portion of the table rear end support portion 41a of the table rear end support member 41. The pin member 43 provided on the rear end surface of the work table 10 is fitted into the pin hole 44 of the standing plate portion 41b of the table rear end support member 41, and the rear end portion of the work table 10 is reliably supported. .
By the way, when the work table 10 is in the use position, the rear end of the work table 10 is supported by the table rear end support mechanism 40, the front part is supported by the table support plate 14, and the both side parts are supported by the base frame 1. It is configured to be supported by a support portion 45a that is continuously provided on the upper edge of the trapezoidal support member 45 that is erected on both sides of the upper surface. Further, the work table 10 and the table support plate 14 are locked by the lock tool 47. Therefore, the work table 10 in the use position is securely held by the rear end support mechanism 40, the table support plate 14, and the support member 45.

Now, a process in which the work table 10 is moved from the use position to the ascendable position through the slide guide mechanism 30 and reaches the lower position through the lift guide support mechanism 20 will be described. First, the rear end of the work table 10 in the use position shown in FIGS. 4 and 5 is removed from the rear end support mechanism 40 of the table, and the work table 10 is moved to the front in FIG. 8 via the slide guide mechanism 30. Move to the position where it can be raised and lowered. Next, the lifting guide support mechanism 20
The work table 10 is pressed via the to lower the work table 10 to the lowered position shown in FIGS. At this time, as shown in FIG.
The descent of the work table 10 pulled out to the front, which is indicated by the chain line, is prevented from being hindered by the support portions 45a of the support members 45 supporting the both end portions of the work table 10 in the use position. Is a support member 45
A notch 46 for inserting the support portion 45a is formed. Then, when the work table 10 is lowered to the lowered position, the work table 10 in the lowered position is locked by the lock mechanism 50 described later.

Next, the lock mechanism 50 of the work table 10 in the lowered position will be described. As shown in FIGS. 4 and 6, a latch tool 51 pivotably attached to both sides of the lower surface of the table support plate 14 is disposed, and a latch claw 51 a is formed at the tip of the latch tool 51. And its head 5
1b is formed in a substantially V shape in a side view. Further, one end of the latch tool 51 is connected to the spring member 52 attached to the base frame 1 side, and the latch claw 51a is always elastic in the engaging direction (the direction in which the latch tool swings clockwise about the pivot axis). Being energized. On the other hand, on both front side portions of the base frame 1, there are stoppers 5 with which the latch members 51 are engaged.
3 are provided. The stopper 53 is provided on a pair of inclined plates 53a that are inclined forward.
b is clamped. When the work table 10 is lowered, first, one inclined portion of the substantially V-shaped head portion 51b of the latch tool 51 contacts the stopper shaft 53b of the stopper 53, and the latch tool 51 moves to one side of the head portion 51b. The inclined portion of is pressed by the stopper shaft 53b, the latch tool 51 is once swung in the direction opposite to the engaging direction against the spring member 52, and the work table 10 is further lowered, whereby the latch tool 51 is , The elasticity of the spring member 52 causes the spring member 52 to swing in the engagement direction, and the latch claw 51 of the latch tool 51
a is engaged with the stopper shaft 53b of the stopper 53,
In the lowered position, the work table 10 is locked.
Therefore, the latch mechanism 51 is automatically engaged with the stopper 53 only by lowering the work table 10 via the guide support mechanism 20 by the lock mechanism 50 described above.
The work table 10 is locked in the lowered position. Also,,
To release this lock, the latch tool 51 is operated and released.

The operation of the lifting table mechanism described above will be supplementarily described. The work table 10 is configured to be switchable between a lifted position having substantially the same height as the cylinder bed 7 and a lowered position lowered by a predetermined distance from the lifted position via the lifting guide support mechanism 20. , The work table 1 through the slide guide support mechanism 30
0 is slid in the front-back direction between the use position and the ascending / descending position. Further, in the use position, the work table 1
The rear end portion of 0 can be reliably supported by the rear end support mechanism 40 of the table. Therefore, since the rear end of the work table 10 in the use position is supported by the table rear end support mechanism 40, the front part is supported by the table support plate 14, and the side part is supported by the support member 45, With the conventional structure, it is possible to reliably hold the work table, which is difficult to hold in the raised position.

[0018]

As described above, according to the lifting type table mechanism of the multi-head sewing machine according to the first aspect of the invention, the table is in a raised position at substantially the same height as the bed portion and in a lowered position lowered by a predetermined distance from the raised position. And a guide support mechanism for the table that enables position switching, and a guide mechanism that slides the table between a raised position and a use position and a liftable position, and a table rear end that supports the rear end of the table in the use position. Since the support portion is provided, the table is moved to the use position through the guide support mechanism and the guide mechanism, and the rear end portion of the table in the use position is securely supported by the rear end support portion of the table. Therefore, the table does not vibrate due to the movement of the work cloth during sewing, so that it is possible to prevent the occurrence of defective sewing, and it is possible to surely stretch the work cloth on the movable frame. To become. Further, according to the lifting type table mechanism of the multi-head sewing machine according to the second aspect, the pin member projecting on the rear end surface of the table fits into the pin hole in the wall portion on the rear end side of the rear end support portion. The rear end can be supported more reliably.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a multi-head embroidery machine according to an embodiment.

FIG. 2 is a plan view of the multi-head embroidery machine of FIG.

FIG. 3 is a cross-sectional plan view showing the lifting guide support mechanism of FIG.

FIG. 4 is a vertical sectional side view showing a state where the work table of FIG. 1 is in a use position.

FIG. 5 is a plan view of a main part showing a state where the work table of FIG. 1 is in a use position.

FIG. 6 is a vertical cross-sectional side view showing a state in which the work table of FIG. 1 is in a lowered position.

FIG. 7 is a plan view of an essential part showing a state where the work table of FIG. 1 is in a lowered position.

FIG. 8 is a vertical cross-sectional side view showing a state in which the work table of FIG. 1 is in a vertically movable position.

9 is a cross-sectional view taken along the line AA of FIG.

10 is an enlarged plan view of a main part of FIG.

[Explanation of symbols]

 6 Bed section of embroidery sewing machine 10 Work table 14 Table support plate 20 Lift guide support mechanism 22 Sliding guide 30 Slide guide support mechanism 31 Long hole 34 Guide plate 40 Table rear end support mechanism 41 Table rear end support member 43 Pin member 44 Pin Hole M Multi-head embroidery machine

Claims (2)

[Claims] 1. A multi-head sewing machine having a common lifting table for a plurality of sewing machines, wherein the upper surface of the table is at the same level as or lower than the upper surfaces of the bed portions of the plurality of sewing machines. A continuous or discontinuous rear end support portion that supports the rear end portion of the table when in the raised position; and a guide support mechanism that guides and supports the table so that the table can be moved up and down with respect to the base frame. A table support plate provided on the upper end of the guide support mechanism to support the table, a use position in which the table is mounted on the table support plate and a rear end portion of the guide support mechanism is mounted on a rear end support portion, and a rear end portion of the table support plate is a rear end support portion. An elevating table mechanism for a multi-head sewing machine, comprising: a guide mechanism that slides forward and backward over an elevating position that is removed to the front side of the. 2. A plurality of horizontal pin members that respectively fit in a plurality of pin holes in the wall portion on the rear end side of the rear end support portion are provided on the rear end surface of the table so as to project therefrom. The lifting type table mechanism of the multi-head sewing machine according to 1.