JPH0593321A - Bobbin transporting device in fine spinning frame or the like - Google Patents

Abstract

(57) [Summary] [Purpose] In a bobbin transfer device that supplies and discharges empty and full bobbins to the spindle rows on both sides along the longitudinal direction of a spinning machine, etc., prevents the endless belt of the transfer mechanism from stretching. Also, it prevents the pitch of the tray with pegs from being distorted due to the attachment of cotton wool or lint. [Structure] Endless guide rails 23a, 23b are arranged along the spindle rows on both sides in the longitudinal direction of the spinning machine, and the endless belt 22 is horizontally rotated along the guide rails with the belt surface vertical. And the tray support 25 having the engaging projections 26 protruding upward is attached to the endless belt 22 at a pitch equal to the spindle pitch. Each tray pedestal 25 is slidably supported by the guide rails 23a and 23b, so that the tension applied to the endless belt 22 can be reduced and the extension does not occur. The tray 31 with pegs has a peg 34 projecting from the center position of the upper surface thereof and a positioning recess 35 formed at the center position of the bottom surface, and the positioning recess 35 is fitted to the engaging projection 26 of the tray receiving table 25. By allowing it to be placed and supported, there will be no misalignment of the position due to flies or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin transfer device in a spinning machine or the like, and in particular, in a ring spinning machine connected to a winder process, empty bobbins are supplied and conveyed to spindle rows on both sides in the longitudinal direction and discharged. The present invention relates to a bobbin transfer device that discharges and conveys a bobbin.

[0002]

2. Description of the Related Art As a conventional bobbin transfer device, an endless belt made of a steel belt or the like is rotatably arranged along a spindle row, and bobbins are inserted into and supported by the endless belt at a pitch equal to the spindle pitch. It is known that a peg is attached. The bobbin inserted into the peg is transferred by rotating the endless belt. Then, a full bobbin on the spindle and an empty bobbin on the peg are exchanged by an automatic pipe changer provided in the spinning machine with the peg and the spindle facing each other. (For example, JP-A-49-54
636, JP-A-50-138, and JP-A-56
See Japanese Patent Publication No. 9431. However, in the case where the peg is directly attached to the endless belt as described above, a large tension is applied to the endless belt to stabilize the posture of the bobbin fitted in the peg, and the endless belt is extremely Since it is very long, even if it is used for a long period of time, the endless belt made of steel also stretches. Therefore, there is a problem that the peg spacing that matches the spindle pitch is misaligned, and if automatic pipe replacement is performed in that state, a pipe replacement error occurs, and as a countermeasure, it takes a lot of time and effort to adjust the peg mounting position. There was a problem that it took time.

In order to solve such a problem, for example, Japanese Patent Publication No. 63-35732 discloses a transfer device which does not use an endless belt. That is, a guide rail is arranged along the spindle row, and a large number of peg-equipped trays having a diameter corresponding to the spindle pitch and having a peg on which the bobbin can be fitted are formed in a row along the guide rail. It is disclosed that the transfer mechanism is slidably fitted to the tray and has a transfer mechanism that pushes and moves one group of trays with pegs by locking claws in locking recesses formed on the bottom surface of the tray with pegs.

Further, in Japanese Patent Laid-Open No. 3-124823,
The belt members are attached to the endless belt at a pitch equal to the spindle pitch, and the tray with pegs having pegs into which bobbins can be inserted can be held between the belt members. There is disclosed a peg for temporarily placing an empty bobbin or a full bobbin when performing.
The belt member is slidably supported by the guide rail.

A little more detail will be described with reference to FIGS. FIG. 11 is an overall schematic plan view showing the ring spinning machine 1
A large number of spindles are provided in parallel on both sides of 01, and an endless belt 102 made of a steel belt is arranged so as to circulate around the spindle with its belt surface vertical. The endless belt 102 is wound between the turning rollers 105, 106, 107 and 108 arranged on the machine ends 103 and 104, and is driven by a drive unit 109.

As shown in FIGS. 12 and 13, a belt member 110 is fixed to the endless belt 102 at a pitch equal to the spindle pitch, and adjacent belt members 110, 110.
The tray 111 with pegs is configured to be engaged and held and transferred between them. The tray 111 with pegs is provided with a peg 114 in which a blank bobbin or a full bobbin is fitted and inserted via a collar 113 above a central position of a disk-shaped substrate 112.

The main body of the belt member 110 is the endless belt 1.
02 has a storage opening 115 which is formed in a U-shape having a vertical cross-section that opens in the lateral direction with respect to the traveling direction, and into which the substrate 112 of the peg-equipped tray 111 is fitted. The substrate 11 is attached to the positioning surface 116 at the back of the accommodation opening 115.
2 and the tray 111 with a peg is positioned. A peg 117 for temporarily placing the bobbin is projected upward from the upper surface of the main body of the belt member 110, and a leg portion 118 for coupling with the endless belt 102 is projected downward from the lower surface. The endless belt 102 is sandwiched between the leg portion 118 and the guide member 119, and is fastened and fixed by the fixing screw 120.

As shown in FIG. 14, a guide rail 121 having an approximately U-shaped cross-section that opens upward and has a brim formed from the upper end to the outer side is along the moving path of the endless belt 102 along the longitudinal direction of the spinning machine 101. This gadrail 1
The leg portion 118 and the guide member 119 of the strip member 110 are slidably guided between the facing surfaces of the strip 21, and the bottom surface of the main body of the strip member 110 is slidably supported on the upper surface of the collar.

Furthermore, in Japanese Patent Publication No. 3-501506, a holding member having a positioning recess for engaging and holding a tray with a peg on its side surface is attached to an endless belt at a pitch equal to the spindle pitch, and the holding member is provided with a peg. It is disclosed that a suction means for sucking and holding the tray is provided, and a support rail for slidably supporting the tray with pegs is arranged in a spindle row arrangement region in the rotation path of the endless belt.

[0010]

However, the Japanese Patent Publication No. 63-
In the structure of the bobbin transfer device disclosed in Japanese Patent No. 35732, since the outer diameter of the tray with pegs must be equal to the spindle pitch, the tray with pegs must be changed when the spindle pitch of the spinning machine changes. There is. In addition, it is necessary to provide separate transfer mechanisms on the left and right sides of the machine frame of the spinning machine, and to operate them synchronously on the left and right sides, which complicates control and requires a complicated interlocking mechanism. There is a problem. Also, since the tray with pegs is fed in groups (usually 12 to 24 pieces), the load on the tray with pegs is large,
There is a problem that the locking recess and the nail are likely to be damaged. Further, there is also a problem that the pitch between the trays with pegs is easily changed due to the inclusion of cotton wool or lint between the trays with pegs.

Further, in the bobbin transfer device disclosed in Japanese Patent Application Laid-Open No. 3-124823, the tray 111 with pegs is fitted into the accommodation opening 115 of the adjacent band member 110 and abutted against the positioning surface 116 for positioning. Therefore, there is a problem in that the position of the pegs may be misaligned due to the inclusion of cotton wool or lint. Further, when the spindle pitch of the spinning machine changes, the mounting pitch of the belt member 110 may be changed, but as a result, the position of the positioning surface 116 of the belt member 110 changes greatly, so the peg tray 111 must be changed. There is the problem of not becoming. In addition, the peg 117 is attached to the belt member 110.
Therefore, there is a problem that the bobbin winding diameter of the peg-equipped tray 111 is limited. In addition to the peg tray 111, which is constantly supplied and discharged, the peg 1
Since 17 is projected on the guide rail and is always rotating, there is also a problem that dust, lint, and the like tend to accumulate.

Further, in the bobbin transfer device disclosed in Japanese Patent Publication No. 3-501506 also, the tray with the peg is adsorbed to the positioning recess of the holding member and abutted against the positioning recess to perform positioning. There is a problem that the position of the tray with pegs may be misaligned due to the adhesion of cotton or lint.

In view of the conventional problems described above, the present invention does not cause the position of the peg-tray to be misaligned due to dust or lint, and the peg-tray holding structure is simple and inexpensive. Also, even if the spindle pitch of the spinning machine changes, it is not necessary to change the tray with pegs, the bobbin winding diameter can be made sufficiently large, and the winding shape is not restricted arbitrarily, and an endless belt is used as the transfer mechanism. Therefore, it is an object of the present invention to provide a bobbin transfer device in which the structure and control of the transfer mechanism are simple, the load on each tray with pegs is small, and there is no risk of damage.

[0014]

SUMMARY OF THE INVENTION According to the present invention, guide rails are arranged at the bottom of a machine frame of a spinning machine or the like so as to follow spindle rows on both sides in the longitudinal direction of the spinning machine, and a belt surface is formed along the guide rails. An endless belt that rotates horizontally with the vertical axis is installed, and a tray pedestal with engaging protrusions protruding upward is attached to this endless belt at a pitch equal to the spindle pitch, and each tray pedestal is guided. The rail is slidably supported, and a positioning recess is formed at the center of the bottom surface of the tray with pegs that is placed and supported on each tray pedestal. The peg into which the bobbin is inserted is projected upward from the position.

[0015]

According to the bobbin transfer device of the present invention, since each tray cradle transferred by the rotation of the endless belt is slidably supported by the guide rail, the tension applied to the endless belt is small. The extension of the endless belt can be prevented, and the trays with pegs can be placed and supported on each tray receiver, and the positioning projections on the bottom of the tray with pegs can be fitted to the engaging protrusions provided on the tray receivers. Since it is positioned, the position will not be changed even by dust or lint.

Since each peg-equipped tray is only loaded with its own load, it will not be damaged by an excessive load.

Even if the spindle pitch of the spinning machine is changed, the same tray with pegs can be used as it is, only by changing the mounting position of the tray holder with respect to the endless belt.

Since the pegs of the tray with pegs only project onto the guide rails, the winding diameter of the bobbin can be made sufficiently large and the winding shape is arbitrary.

Further, an engaging projection is provided on the tray cradle,
Since it is only necessary to form the positioning recess on the bottom surface of the peg-equipped tray, the tray pedestal and the peg-equipped tray are simple in shape and structure and can be constructed at low cost.

Further, since the transfer mechanism composed of the guide rail and the endless belt is applied, the facility cost is remarkably reduced as compared with a complicated transfer mechanism in which a reciprocating mechanism is provided on both sides of the spinning machine and synchronous control is performed. It can be lowered.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In FIGS. 1 and 2, 1 is a spinning machine, and 2 is its base. Spindle rails 3 are provided at intermediate height positions on both sides of the machine base 2 in the longitudinal direction, a large number of spindles 4 are provided at a predetermined pitch, and a spindle row 5 is configured.

On both sides of the lower part of the machine base 2, the automatic bobbin changer 6 for taking out the full bobbins 51 from the respective spindles 4 of the spindle train 5 and mounting the empty bobbin 50, and this automatic changer 6
Full bobbin 51 taken out in
And a bobbin transfer device 11 that supplies the empty bobbin 50 that is supplied from the winder 10 to the automatic pipe changer 6.

The automatic pipe changing device 6 includes a chuck mechanism portion 7 for holding each bobbin of the spindle train 5, an elevating mechanism 8 for elevating the chuck mechanism portions 7 up and down, and an elevating mechanism 8 in an upright posture and left and right outer sides. The pipe replacement mechanism 6 itself is not a gist of the present invention, and is, for example, Japanese Patent Publication No. 48-309.
No. 70 or Japanese Patent Publication No. 51-240
Since it is a well-known device as disclosed in Japanese Patent Laid-Open No. 08, etc., detailed description thereof will be omitted. A cylinder device 9a is shown in FIG. 2 as a drive means of the swing mechanism 9.

Reference numerals 12 and 13 denote machine ends of the spinning machine 1, and the turning roller 1 provided at one of the machine ends 12.
The bobbin transfer device 11 is arranged in an endless manner so as to surround the rollers 4, 15 and the turning rollers 16, 17 arranged between the machine end 13 and the winder 10 on the other side. The bobbin transfer device 11 is provided between the turning roller 17 and the machine end 13.
Bobbin transfer device 18 for picking up the full bobbin 51 transferred at and feeding it to the winder 10.
And a supply bobbin transfer device 19 for supplying the empty bobbin 50 sent from the winder 10 onto the bobbin transfer device 11 between the turning roller 16 and the machine end 13. 20 is a full bobbin for the winder 10.
1 is a bobbin discharge rail for discharging 1 and 21 is a bobbin supply rail for supplying an empty bobbin 50 from the winder 10. These rails 20, 21 are arranged parallel to the bobbin transfer portion of the bobbin transfer device 11 and at a position directly above it. ing.

As shown in detail in FIGS. 3 to 6, the bobbin transfer device 11 includes an endless belt 2 made of a steel belt or the like.
Equipped with 2. The endless belt 22 is wound around the turning rollers 14, 15, 16, 17 with its belt surface being vertical and is rotatable in the horizontal direction, and the turning roller 14 or 15 is appropriately rotated by a driving means. It rotates by doing so. Along the rotation path of the endless belt 22,
A pair of guide rails 23a and 23b are arranged so as to sandwich the endless belt 22 from both sides.
It is fixed to the lower part of the with bolts 24.

On the endless belt 22, tray trays 25 are attached at a pitch equal to the spindle pitch of the spindle train 5. This tray cradle 25 is an endless belt 2
2 is formed of a disc located at the upper edge of the disc, and a short round shaft-like engaging projection 26 having a conical tip is projected upward from the center position of the upper surface thereof, and the lower surface is provided on one surface of the endless belt 22. A mounting leg 27 hangs along the line. The endless belt 22 is sandwiched between the mounting leg 27 and the nut member 28 and fastened and fixed by the bolt 29. The lower surface of the tray pedestal 25 is the upper guide surface 3 of the guide rails 23a and 23b.
It is slidably supported at 0a. A guide surface 30b for slidably guiding the outer surface of the mounting leg 27 is formed on the outer guide rail 23a, and a guide surface 30b for guiding the other surface of the endless belt 22 is provided on the inner guide rail 23b. 30c and a passage groove 30d for the nut member 28 are formed. The tray pedestal 25 is made of a resin material having a predetermined strength, a small friction coefficient, and a small sliding resistance.

The tray 31 with the pegs is placed and supported on the tray holder 25 and is transferred. Tray with pegs 3
1 is a round shaft-shaped peg 3 having a conical tip end via a ring portion 33 from the center position of the upper surface of the disc-shaped tray portion 32.
4 is projected. In addition, a positioning recess 35 into which the engaging protrusion 26 of the tray holder 25 is fitted is formed at the center position of the lower surface of the tray portion 32. The tray 31 with pegs is also made of a molded product of a resin material having a predetermined strength, a small friction coefficient, and a small sliding resistance.

From the outer edges of the flanges of the guide rails 23a and 23b, the tray 3 with the pegs supported on the tray holder 25 is provided.
The cover rails 36a and 36b having an L-shaped cross section for guiding and regulating the outer peripheral portion of the tray portion 32 of No. 1 from above are extended to prevent wind surfaces and lint from entering the guide rails 23a and 23b as much as possible. ing.

7 and 8, details of the discharge bobbin transfer device 18 for removing the peg-equipped tray 31 in which the full bobbin 51 is inserted from the bobbin transfer device 11 and sending it to the winder 10 through the bobbin discharge rail 20. Is shown.
The bobbin transfer device 18 has a tip end portion that engages with the tray receiving base 25 without buffering on both sides of the tray portion 32 of the peg-equipped tray 31 supported on the tray receiving base 25, and has a base portion. Is composed of a pair of inclined rails 37a and 37b connected to the bobbin discharge rail 20. Preferably, the inclined rails 37a and 37b are arranged in parallel to the positions directly above the facing portions of the moving path of the endless belt 22.

When the trays 31 with pegs sequentially transferred by the bobbin transfer device 11 reach the tips of the inclined rails 37a, 37b, the tray portion 32 thereof rides on the inclined rails 37a, 37b, and the engaging protrusions are formed. It is pushed up along the inclined rails 37a and 37b with the movement of the tray pedestal 25 until 26 is removed from the positioning recess 35. Similarly, the subsequent tray 31 with pegs is sequentially pushed up, so that the tray 31 with pegs is sequentially sent to the bobbin discharge rail 20 and sent to the winder 10.

In FIGS. 9 and 10, the empty bobbin 50 sent from the winder 10 through the bobbin supply rail 21.
The tray 31 with the peg fitted therein is attached to the bobbin transfer device 11
The details of the supply bobbin transfer device 19 for sequentially supplying the same are shown. The bobbin transfer device 19 includes a stopper 38 disposed at a distance slightly longer than the diameter of the peg-equipped tray 31 from the tip of the bobbin supply rail 21, and between the tip of the bobbin supply rail 21 and the stopper 38. And a pair of lift plates 39a, 39b whose upper end portions are vertically movable between the height position of the bobbin supply rail 21 and the support position of the peg-equipped tray 31 on the tray receiver 25, and these lift plates 39a, 39b. Member 40 for connecting the lower ends of the
And engaging rails 41a and 41b provided on the upper ends of the elevating plates 39a and 39b for engaging and holding both sides of the tray portion 32 of the peg-equipped tray 31, and a cylinder device for vertically moving the central portion of the connecting member 40. It is composed of 42.

In the arrangement part of the bobbin transfer device 19,
The cover rails 36a, 36b of the guide rails 23a, 23b of the bobbin transfer device 11 are removed, and the lower portions of the guide rails 23a, 23b are notched so as not to interfere with the connecting member 40.

With the lifting plates 39a, 39b in the raised position, the tray 3 with pegs is passed through the bobbin supply rail 21.
When 1 is sent out and the leading tray 31 with pegs contacts the stopper 38 and stops, the leading tray 31 with pegs is in a state of being supported by the engagement rails 41a and 41b. At this time, the tray pedestal 25 of the bobbin transfer device 11 is stopped at a position directly below the peg-equipped tray 31, the cylinder device 42 is operated, and the elevating plates 39a and 39b are lowered to engage the engagement rails 41a and 41b. The peg-equipped tray 31 supported by the tray holder 25 is transferred onto the tray holder 25 and supported by the tray holder 25. Then the bobbin transfer device 11
Is moved by one pitch of the tray pedestal 25, the tray 31 with pegs is disengaged from the engaging rails 41a and 41b, so that the cylinder device 42 operates to move the lifting plates 39a and 39b.
b rises. By repeating the above operation, the peg-equipped tray 31 in which the empty bobbin 50 sent from the bobbin supply rail 21 is inserted is sequentially transferred to the bobbin transfer device 1.
1 is supplied.

As shown in FIG. 2, on the outer edges of the spindle rails 3 on both sides of the spinning machine 1, temporary pegs 43 for temporarily holding the bobbins at the time of the pipe replacement work are made to correspond to the respective spindles 4. It is arranged. These temporary pegs 4
Since 3 corresponds to the swing mechanism 9 of the automatic pipe changing device 6, it is slightly inclined to the outside in accordance with the position where it is arranged.

Next, the overall operation of the above configuration will be described.

The tray 31 with pegs, into which the empty bobbin 50 supplied from the winder 10 through the bobbin supply rail 21 is fitted, is moved to the bobbin transfer device 11 at a position before the machine end 13 by the supply bobbin transfer device 19. The trays 25 are supplied to and mounted on and supported by the tray receiving trays 25. At that time, the tray 31 with pegs is positioned by the engaging projection 26 of the tray receiving stand 25 being fitted into the positioning recess 35 thereof.
Accurate positioning is achieved without being affected by wind surface or lint. These empty bobbins 50 are transferred by the bobbin transfer device 11 to the lower position of the spindle row 5 on one side or the other side of the spinning machine 1 which needs to be changed by the rotation of the endless belt 22. It is positioned at a position corresponding to each spindle 4 and stops.

Next, the full bobbin 5 on each spindle 4 of the spinning machine 1 is processed by the automatic pipe changer 6 based on various known methods.
1 and the empty bobbin 50 on the peg-equipped tray 31 of the bobbin transfer device 11 are exchanged. As an example of the exchange method,
First, the empty bobbin 50 on the tray 31 with pegs is temporarily inserted into the peg 43 and temporarily held, then the full bobbin 51 on the spindle 4 is held on the tray 31 with pegs on the bobbin transfer device 11, and finally. There is a method of inserting the empty bobbin 50 of the temporary peg 43 into each spindle 4.

The full bobbin 51 transferred to the bobbin transfer device 11 is transferred toward the discharge bobbin transfer device 18 by the rotation of the endless belt 22. In the bobbin transfer device 18, as described above, the inclined rails 37a,
The tip of 37b is the tray 3 with pegs on the tray pedestal 25.
1, the endless belt 22 is rotated to pull up the peg-equipped tray 31, and the engagement with the engagement protrusion 26 is released.
The full bobbin 51 is pushed toward the winder 10 through the bobbin discharge rail 20 by being pushed by the subsequent tray 31 with the pegs.

In the above embodiment, the discharging bobbin transfer device 18 uses the inclined rail system with the inclined rails 37a and 37b, and the supply bobbin transfer device 19 uses the lift plate 1.
Although the ascending / descending method by 9a and 19b is used, either one of the supplying side and the discharging side may be adopted. The point is that the tray 31 with pegs may be placed or pulled up and down with respect to the tray pedestal 25, and any other transfer mechanism can be applied.

[0041]

According to the bobbin transfer device of the spinning machine of the present invention, since each tray cradle transferred by the rotation of the endless belt is slidably supported by the guide rails, the endless belt. The tension to be applied to the tray is small, the endless belt can be prevented from stretching, and the trays with pegs can be placed and supported on each tray holder, and the positioning recesses can be fitted to the engaging protrusions provided on the tray holder. Since it is positioned by using the above-mentioned method, the position will not be changed even by dust or lint. Since each peg tray is only loaded by its own weight, it will not be damaged by an excessive load. Even if the spindle pitch of the spinning machine changes, the same tray with pegs can be used as it is by simply changing the mounting position of the tray pedestal to the endless belt. Since the pegs of the tray with pegs only project onto the guide rails, the winding diameter of the bobbin can be made sufficiently large and the winding shape is arbitrary.

Further, an engaging protrusion is provided on the tray cradle,
Since it is only necessary to form the positioning recess on the bottom surface of the peg-equipped tray, the tray pedestal and the peg-equipped tray are simple in shape and structure and can be constructed at low cost. In addition, since a transfer mechanism consisting of a guide rail and an endless belt is applied, the equipment cost is significantly reduced compared to a complicated transfer mechanism such as providing reciprocating movement mechanisms on both sides of the spinning machine for synchronous control. be able to.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of an embodiment of a bobbin transfer device of the present invention.

FIG. 2 is a schematic side view of the spinning machine in the example.

FIG. 3 is a perspective view of a main part of the embodiment.

FIG. 4 is a vertical sectional side view of a main part of the embodiment.

FIG. 5 is a plan view of a main part of the embodiment.

FIG. 6 is a front view of a main part of the embodiment.

FIG. 7 is a front view of the bobbin discharging device from the bobbin transferring device in the embodiment.

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

FIG. 9 is a front view of the bobbin supply device for the bobbin transfer device in the embodiment.

10 is a cross-sectional view taken along the line BB of FIG.

FIG. 11 is a plan view showing a schematic configuration of a conventional bobbin transfer device.

FIG. 12 is an enlarged front view of a main part of the conventional example.

FIG. 13 is a plan view of FIG.

14 is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 spinning machine 2 machine stand 5 spindle row 11 bobbin transfer device 22 endless belt 23a guide rail 23b guide rail 25 tray receiving stand 26 engaging projection 31 tray with peg 34 peg 35 positioning recess

Claims (6)

[Claims] 1. A guide rail is disposed below a machine frame of a spinning machine or the like along the spindle rows on both sides in the longitudinal direction of the spinning machine, and the belt surface is vertically rotated along the guide rail in the horizontal direction. A moving endless belt is installed, and a tray pedestal with engaging protrusions protruding upward is attached to this endless belt at a pitch equal to the spindle pitch, and each tray pedestal is slidably supported by guide rails. Then, at the center position of the bottom surface of the tray with pegs that is placed and supported on each tray pedestal, there is provided a positioning recess in which the engaging projection of the tray pedestal fits, and the bobbin moves upward from the central position of the tray. A bobbin transfer device in a spinning machine or the like, characterized in that a peg to be inserted is projected. 2. A bobbin transfer device in a spinning machine or the like according to claim 1, wherein the guide rail is provided with a guide surface for slidably guiding the bottom surface of the tray cradle and a portion vertically suspended from the tray cradle. 3. A bobbin transfer device for a spinning machine or the like according to claim 1, wherein the mounting leg is hung from the bottom surface of the tray cradle, and the endless belt is clamped and fastened by the mounting leg and a nut member. 4. The bobbin transfer device in a spinning machine or the like according to claim 3, wherein the guide rail is provided with a tray pedestal bottom surface, an endless belt, and guide surfaces for the mounting legs. 5. The bobbin transfer device in a spinning machine or the like according to claim 1, wherein the guide rails are arranged endlessly. 6. The bobbin transfer device in a spinning machine or the like according to claim 1, wherein the engaging projection is a short round shaft having a conical portion at its tip, and the positioning recess is a cylindrical hole.