JPS5913990Y2 - Safety devices on work tables - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a work table on which a porta-pull sewing machine is placed to perform sewing work. The present invention relates to a work table equipped with a sleeve plate that is movable to a lower position.

Conventionally, various types of this type of table have been provided mainly as tables for free-arm sewing machines, and generally the sleeve plate is connected to the table by a link mechanism, etc., and used as a free-arm sewing machine. When used, the sleeve plate is moved to the lower position where it rests on the table, and when a wider work surface is required, it is moved to the upper position so that it forms almost the same plane as the workpiece support surface of the sewing machine. and is now in use.

However, with this type of table, if the sewing machine user suddenly moves while holding the sleeve plate when moving the sleeve plate from the upper position to the lower position, the sleeve plate has a certain degree of hardness and weight. There is a risk that fingers or the like may be accidentally caught between the table top surface and the sleeve plate, causing damage to the fingers or the like.

Therefore, the present invention was devised in order to prevent such dangers in conventional tables. This invention provides a safety device for a work table that is designed to alleviate the

Hereinafter, an embodiment embodying this invention will be explained based on the drawings. In the drawing, 1 is a cabinet section 2, a table section 3, and a leg section 4 that supports the table section 3. As shown in FIG. 3, the cabinet section 2, which is the base of the work table, has an upper storage section 5 with an opening at the top for storing an iron, etc., and two storage sections for storing small items. A drawer 6 and a lower storage section 7 for storing the head of the sewing machine are provided.

Reference numeral 8 denotes a door for opening and closing the front surface of the lower storage section 7.

Reference numeral 9 denotes a sliding plate constituting a part of the top plate of the cabinet section 2, which can be slid to a forward protruding position, and when the sliding plate 9 is protruded, the upper storage section 5 is opened upward. ing.

As shown in FIGS. 3, 5, and 6, 10 is a table support plate fixed to the upper end of the side plate 12 of the cabinet section 2 by a fixing metal fitting 11, and is attached to the side plate 12 of the cabinet section 2 together with the sliding plate 9. It constitutes a top plate, and the left side edge protrudes to the left side of the side plate 12.

Reference numeral 13 denotes a table support frame of the table portion 3, which is attached to the side protrusion of the table support plate 10 by an appropriate number of hinges 14 at the side frame portion 13a, as shown in FIGS. 5 and 6. , which can be rotated between a horizontal position and a vertically hanging position.

Reference numeral 15 is fixed to the right side of the front end of the upper surface of the table support frame 13, and cooperates with the table support plate 10 to mount the hook-arm porta-pull sewing machine M, as shown in FIGS. 2, 7, and 8. It is a placing plate as a placing part for placing the table, and its front end projects slightly forward from the table support frame 13, and when the table part 3 is positioned horizontally as shown in FIG. It forms the same plane as the upper surface of the plate 10.

In addition, the porta pull sewing machine M was manufactured by Utility Model No. 51-1183.
As shown in Japanese Patent No. 59, a cylindrical lower arm M3 is provided, and a workpiece support surface M1 of the lower arm M3 is provided.
A workpiece support plate (auxiliary plate) M2 is supported in close proximity to the lower arm M3 so as to extend the lower arm M3.

When the sewing machine is used as a free-arm sewing machine, the workpiece support plate M2 is moved and supported under the lower arm M3.

Reference numeral 16 denotes a front sleeve plate attached to the front frame portion 13b of the table support frame 13 by a hinge 17 on the left side of the mounting plate 15, as shown in FIGS. 5, 9, and 10. , as shown in FIGS. 1 and 2, the mounting plate 15
It is designed to be rotatably arranged between a lying position where it forms the same plane as the upper surface of the body, and an upright position where it rises obliquely forward from that position.

The front ends of the front sleeve plate 16, the mounting plate 15, the table support plate 10, and the sliding plate 9 are formed to hang downward in an arc shape, and the front sleeve plate 16 is in the collapsed position. Sometimes their anterior ends are continuous.

Further, as shown in FIGS. 3 and 10, the hinge 17
is fixed to a recess 18 formed on the left side of the front frame portion 13b, so that the thread 17 and the lower surface of the front sleeve plate 16 do not interfere with each other.

Reference numeral 19 denotes an upper sleeve plate having a substantially L-shaped plane and located behind the front sleeve plate 16 and the mounting plate 15, and as shown in FIGS. 9 and 10, a front protrusion 19 a The front end of the front sleeve plate 16 is hinged to the rear end of the front sleeve plate 16, and is continuous with the front sleeve plate 16, the above-mentioned mounting plate 15, and the table support plate 10 when the front sleeve plate 16 is in the collapsed position as shown in FIG. When the front sleeve plate 16 is in the upright position, the free arm type is placed in an upper horizontal position and placed on the mounting plate 15, as shown in FIGS. 2 and 8. It forms the same plane as the workpiece support surface M1 of the sewing machine M, and the front protrusion 19a and the side protrusion 19b are continuous with the left edge and side edge of the workpiece support surface M1, respectively.

As shown in FIGS. 9 and 10, 20 is a screw connecting the front sleeve plate 16 and the upper sleeve plate 19, and the pair of fixing pieces 20a connect the front sleeve plate 16 and the upper sleeve plate, respectively. 19, and is formed by bending both rotation pieces 20a upward so that the connecting shaft 21 is located within the gap between both sleeve plates 16 and 19, and the upper sleeve plate 19 is located at the upper position. When the front sleeve plate 16 is placed in the upright position, both rotating pieces 20a engage with each other to prevent further upward movement of the upper sleeve plate 19 and rotation of the front sleeve plate 16 in the upright position. is now being prevented.

Reference numerals 22 and 23 denote cover members fixed to the rear end surface of the front sleeve plate 16 and the front end surface of the upper sleeve plate 19, respectively, and when both the sleeve plates 16 and 19 form the same horizontal plane, both the extension parts The leading edges of the images overlap each other to connect the upper surfaces of both sleeve plates 16 and 19, and when the upper sleeve plate 19 is in the upper position, the arcuate portion is exposed and acts to close the gap between the two sleeve plates. It is.

24, as shown in FIGS. 5, 9, and 10, fixing pieces 25 which are connected to the upper and lower ends thereof are fixed to the lower surface of the upper sleeve plate 19 and the lower surface of the intermediate frame portion 13C of the table support frame 13, respectively. A pair of left and right rotating plates, including a front sleeve plate 16
The length is approximately the same as the distance between the hinges 17 and 20 of the hinges 17 and 20.

Therefore, the rotating plate 24, the upper sleeve plate 19, and the front sleeve plate 16
and the table support frame 1 by the table support frame 13
A four-bar link with 3 as a fixed node is constructed.

27 is between the front sleeve plate 16 and the rotating plate 24,
The cross section fixed to the lower surface of the outer side frame portion 13d of the table support frame 13 is a first guide tool shaped like a square, and the vertical portion 27a has a long groove 28 extending in the horizontal direction that is transparent in the front and back direction. It is set up.

Reference numeral 29 denotes a second guide tool having a generally mouth-shaped cross section fixed on the lower surface of the central frame portion 13f of the table support frame 13 opposite to the first guide tool 27; A long groove 30 similar to the first guide 27 is provided.

Further, as shown in FIG. 11, the right vertical portion 29b has openings 31.3 at positions facing both ends of the long groove 28, respectively.
2 is provided.

Reference numeral 33 denotes a fixture 34 fixed to the back surface (lower surface) of the front sleeve plate 16 at the intermediate portion, as shown in FIGS. 10 and 11.
．． a flank-shaped retaining arm rotatably and axially slidably supported at both open ends 3;
3a and 33b are inserted into the long groove 28 so as to be movable back and forth.

When the upper sleeve plate 19 is placed in the lower position and the front sleeve plate 16 is placed in the collapsed position, the holding arm 33
is laid down so that its open ends 33a and 33b are located at the rear end of the long groove 28, and when the upper sleeve plate 19 is placed in the upper position and the front sleeve plate 16 is placed in the upright position, the holding arm 33 is erected as shown in FIG.

35 is a stop ring 35a attached to the middle part of the holding arm 33 and the mounting tool 34, as shown in FIG.
A compression spring wound around the holding arm 33 between the holding arm 33 and one side (left side) of the holding arm 33 constantly presses the holding arm 33 in the direction of arrow P in FIG.

As shown in FIG. 13, 36 is a stop ring attached to the right open end 33b of the holding arm 33, which engages with the right vertical part 29b of the second guide 29 to stop the holding arm 33. This acts to restrict movement in the axial direction.

Note that the edge 33C of the right open end 33b of the holding arm 33
constitutes a locking portion that can be engaged with an opening 31, 32 provided in the right vertical portion 29b of the second guide 29.

Reference numeral 37 denotes a grip attached to the left open end 33a of the holding arm 33.

Reference numeral 38 denotes an abbreviated rotating lever that is rotatably attached to the lower surface of the outer side frame portion 13d of the table support frame 13 with a stepped screw 39, and has one end extending laterally of the table support frame 13. The operating portion 38a is also provided with a locking portion 38b that can lock with the left open end 33a of the holding arm 33 at the other end extending toward the first guide fitting 27 side.

Reference numeral 40 denotes a coil spring tensioned between one end 38a of the rotary lever 38 and a fixing screw 41 attached to the lower surface of the side frame portion 13d of the table support frame 13, and a coil spring 40 is used to rotate the rotary lever 38 at the second end. In Fig. 14, it is urged to rotate clockwise.

Therefore, when the holding arm 33 is positioned on the front end side 28a of the long groove 28, the rotating lever 38 comes into contact with the inside of the vertical portion 27a of the first guide 27, and the holding arm 33 It is located in the movement locus of the left open end 33H of.

Reference numeral 42 denotes a leg body provided so as to be movable between a position below the table support plate 10 and a position below the outer side frame portion 13d of the table support frame 13, and includes a pair of front and rear legs 4.
A reinforcing frame 45.46 is provided between the upper and lower sides of 3.44.

Reference numeral 47 denotes a pair of leg supports fixed at front and rear positions on the lower surface of the side frame portion 13d, which engage with the upper part of the leg body 42 when the leg body 42 is placed at a lower position of the side frame portion 13d. It looks like this.

Therefore, if the legs 42 are placed below the table support plate 10 and the table part 3 hangs down, the legs 42 can be placed between the table support frame 13 and the side plate 12 of the cabinet part 2, and With the table part 2 horizontal, the legs 42 are placed below the side frame part 13d, and the upper reinforcing frame 45
When the leg receivers 47 are engaged on top, the legs 42 become legs of the table part 3, and the table part 3 can be held in a horizontal position.

48 and 49 are wheels attached to the lower ends of the front leg 43 and the rear leg 44.

50 is a connecting plate for connecting the rear upper part of the side plate 12 of the cabinet part 2 and the rear leg 44 between the reinforcing frames 45 and 46, and is formed so that it can be folded toward the front at the intermediate part thereof. , when the leg body 42 is placed in a position supporting the table part 3, it is stretched, and when the leg body 42 is placed in a position below the table support plate 10, it is folded at the middle part and the front leg 43 and the rear leg 44.

The connecting plate 50 and the leg 42 constitute the leg 4.

Next, the operation of the work table configured in this way will be explained.

Now, FIGS. 4 and 6 show a non-use state in which the legs 42 are placed in a non-use position and the table portion 3 is suspended.

To change from this state to a use state, rotate the table part 3 upward, move the legs 42 outward, and engage the leg receivers 47 of the reinforcing frame 45 with the upper part of the legs 42. As shown in FIG. 1, the upper surface of the table portion 3, that is, the upper surface of the front sleeve plate 16, the upper sleeve plate 19, and the mounting plate 15, is supported in a substantially horizontal state. 10 and the top surfaces of the sliding plate 9 form the same plane.

As a result, a wide and flat work surface is formed, allowing tasks such as ironing and cutting to be carried out efficiently.

At this time, the holding arm 33 is laid down as shown in FIG. 9, and its open ends 33a and 33b are connected to the first and second guide tools 27.
29 (the left end in FIG. 9), and is further moved to the right (the left end in FIG. 9) by the action of the compression spring 35, as shown by the solid line in FIG.
right side open end 33 b
The edge 33C is the right vertical part 29 of the second guide 29.
It is in a state where it is engaged with the aperture 32 of b.

Therefore, upward movement of the front sleeve plate 16 and the upper sleeve plate 19 is prevented.

Further, the gripping body 37 is attached to the upper sleeve plate 19 as shown in FIG.
Since the grip body 37 is located below and does not protrude to the left side of the upper sleeve plate 19, it does not interfere with the work.

Next, in order to place the free-arm porta-pull sewing machine M on the mounting plate 15 and perform normal sewing work, first, the gripper 37
After operating the holding arm 33 to the left in FIG. 13 and disengaging the end portion 33C of the holding arm 33 from the opening 32, the front sleeve plate 16 When the upper sleeve plate 19 is moved upward while standing up diagonally, the open ends 33a and 33b of the holding arm 33 move along the long grooves 28°30 of the first and second guide tools 27.29(7). and their open ends 33a.

33b is engaged with the front ends 28a, 30a of the long grooves 28.30 as shown in FIG. The edge 33C of the open end 33b is engaged with the opening 31, and the upper sleeve plate 19 and the front sleeve plate 16 are reliably and firmly in the upper position and the upright position as shown in FIGS. 10 and 11. Retained.

Note that when the holding arm 33 is moved toward the front ends 28a and 30a of the long grooves 28.30, the rotation lever 38
is brought into contact with the inside of the vertical portion 27a of the first guide 27 by the action of the coil spring 40, and is located within the movement trajectory of the left open end 33a of the holding arm 33, as shown in FIG. .

In this way, by holding the upper sleeve plate 19 at the same height as the workpiece support surface M1 of the sewing machine M, the rear end edge and the left end edge of the workpiece support surface M1 of the sewing machine M are continuously operated. A surface is formed.

Therefore, the support surface for the workpiece is substantially expanded, and even if the workpiece cloth is large, sewing and feeding of the workpiece cloth can be performed smoothly.Furthermore, the front sleeve plate 16 stands obliquely,
Since a working surface that is continuous with the front edge of the upper sleeve plate 19 is formed, the work cloth is smoothly guided without being caught by the front edge of the upper sleeve plate 19, and furthermore, the front sleeve plate 16 allows the workpiece to be smoothly guided as described above. Even if the sleeve plate 19 is floating, the table support frame 1
3. Internal mechanisms such as the rotating plate 24 can be hidden from view from the front.

Therefore, the sewing work can be carried out efficiently, and the appearance can be prevented from being spoiled because the internal mechanism cannot be seen.

Furthermore, since the upper sleeve plate 19 and the front sleeve plate 16 are securely held in the upper position and the upright position by the holding arm 33 and the first and second guides 27 and 29, it is easy to use the sewing machine. There is no possibility that the locking action will be released due to vibrations of the sewing machine or the like.

Next, as shown in FIG. 7, the workpiece support plate M of the sewing machine M is
2 is folded downward and the lower arm M3 is hooked, to sew the annular part, etc., hold the upper sleeve plate 19 and operate the gripper 37 to move the holding arm 33 to the compression spring 35.
The right open end 33 b is moved to the left against the action of
The engagement between the edge 33C and the aperture 31 is disengaged.

Next, when the upper sleeve plate 19 and the front sleeve plate 16 are slowly moved downward, the open ends 33a, b of the holding arm 33 are moved rearward along the circumferential groove 28.30.

During this movement, the upper sleeve plate 19
3, the open end 33a of the holding arm 33 engages with the engaging portion 38b of the rotary lever 38 to prevent its movement.

Thus, the upper sleeve plate 19 and the front sleeve plate 16 are temporarily held in the state shown in FIGS. 12 and 14.

Next, let go of the upper sleeve plate 19 and the front sleeve plate 16, operate the operating portion 38a of the rotary lever 38, and move the rotary lever 38 counterclockwise in FIG. 14 against the action of the coil spring 40. When the left open end 33a of the holding arm 33
is released, the front sleeve plate 16 and the upper sleeve plate 19 move downward by their own weight, and both open ends 33a, 33b of the holding arm 33 are engaged with the rear ends 28b, 30b of the long grooves 28, 30. After that, the holding arm 33 is moved to the right by the action of the compression spring 35, and the edge 33C of the right open end 33b engages with the opening 32 of the second guide 29, as shown in FIG. is,
The upper sleeve plate 19 and the front sleeve plate 16 are held in the lower position and the collapsed position.

In this way, the front sleeve plate 16 and the upper sleeve plate 19 are arranged on the same plane as the mounting plate 15 and the top plate of the cabinet section 2.

Therefore, the periphery of the lower arm M3 is opened, and circular sewing or the like can be easily performed without any trouble.

Further, as described above, while the upper sleeve plate 19 is being moved from the upper position to the lower position, the rotating lever 38 engages with the holding arm 33 and acts as a stopper, so that the upper sleeve plate 19 is moved from the upper position to the lower position. Since the sewing machine is temporarily stopped slightly above the table support frame 13, the sewing machine user's fingers, etc. are connected to the upper sleeve plate 19, the front sleeve plate 16, and the table support frame 13.
Also, since it is prevented from being pinched between it and the mounting plate 15, there is no possibility of injuring fingers or the like.

Next, at the end of the sewing work, after storing the sewing machine M in the lower storage section 7 inside the door 8, the connecting plate 50 of the leg 42 is folded and the leg 42 is moved toward the cabinet section 2. If the table portion 3 is allowed to hang down, it can be made compact as shown in FIG. 4, making it convenient to store when not in use.

At this time, as described above, the edge 33C of the right open end 33b of the holding arm 33 is aligned with the opening 3 of the second guide 29.
2, the upper sleeve plate 19 and the front sleeve plate 16
never becomes delusional.

Although this embodiment has been described using a porta-pull sewing machine having a lower arm formed in a cylindrical shape, it goes without saying that a sewing machine commonly referred to as a child bed type sewing machine can also be used in the same manner.

As described in detail above, the present invention provides a work table that is provided with a sleeve plate that is movable between an upper position that forms the same surface as the workpiece support surface of the sewing machine and a lower position that is moved below the workpiece support surface of the sewing machine. , when the sleeve plate is moved from the upper position to the lower position, a stopper is provided to temporarily stop the sleeve plate from moving towards the lower position during the movement. To provide a work table which can be used by a sewing machine user with peace of mind since there is no danger of fingers or the like getting caught between the table top surface and the sleeve plate.

[Brief explanation of the drawing]

The drawings show a work table that embodies this invention, and FIG. 1 is an overall perspective view showing the state of use with the front sleeve plate placed in the collapsed position and the upper sleeve plate placed in the downward position. Figure 2 is an overall perspective view showing the state of use with the front sleeve plate placed in the upright position and the upper sleeve plate placed in the upper position, Figure 3 is an exploded perspective view showing the hinges removed, and Figure 4 is the legs. FIG. 5 is a plan view, FIG. 6 is a sectional view of the unused state, and FIG. 7 is a sectional view of the annular edge. , FIG. 8 is a sectional view showing the state of normal sewing, and FIGS.
Figure 2 is for explaining the action of the sleeve plate, and Figure 9 is a left side view in the state shown in Figure 1, and Figure 10 is a left side view of both sleeve plates with the upper sleeve plate moved to the upper position. side view,
11 is a sectional view taken along the line XI-X of FIG. 2, FIG. 12 is a partially cutaway side view showing the open end of the holding arm engaged with the rotating lever, and FIGS. 13 and 14. is holding arm and first,
13 is a plan view of FIG. 9, FIG. 14 is a plan view of FIG. 12, and shows the relationship with the second guide.
FIG. 15 is a sectional view taken along the line xv-xv in FIG. 1. DESCRIPTION OF SYMBOLS 1... Base body, 15... Mounting plate, 16... Front side sleeve plate, 19... Upper side sleeve plate, 27... First guide tool, 28
...Long groove, 29...Second guide tool, 30...Long groove, 31.32...Opening hole, 33...Holding arm, 38...
・Rotating lever, 40...coil spring.

Claims (1)

[Claims for Utility Model Registration] l A base body having a horizontally extending workpiece support surface for mounting a porta-pull sewing machine, and a base body provided on the base body, which is approximately the same as the workpiece support surface of the sewing machine. a sleeve plate movable between an upper position forming the same plane and a lower position superimposed on the placing part or adjacent to the placing part and moved so as to be substantially flush with the placing part; The work table includes: a holding arm whose base end is rotatably provided on the sleeve plate side; and a guide groove portion provided on the base side for slidably guiding the open end of the holding arm. a guide tool; an operating position in which the open end of the holding arm enters a predetermined position immediately before the lower position of the sleeve plate during a movement trajectory of the open end of the holding arm according to the guide groove; and a working position that allows the open end of the holding arm to move to the lower position of the sleeve plate; A safety device for a work table comprising a stopper disposed on the base body side so as to be displaceable between the predetermined position and a retracted inactive position. 2. The stopper is rotatably provided on the side of the base body, and has an engaging part that can engage with the open end of the holding arm at one end, and an operating part that extends to the side of the base body at the other end. One end of the lever is normally biased to be held in the predetermined position capable of engaging with the open end of the holding arm by the action of a spring provided between the lever and the base body. A safety device for a work table according to claim 1 of the utility model registration claim.