JPH0427882Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a splicing device in a belt-shaped material unwinding device. The present invention relates to a splicing device in a belt-shaped material unwinding device that can automatically splice pieces together.

[Prior art]

Conventionally, a device for unwinding a strip-shaped material is known, for example, as disclosed in Japanese Patent Application Laid-open No. 137749/1983. This conventional device unwinds a strip of material from a stock roll that is spirally wound with a so-called liner made of a sheet of woven fabric or plastic interposed between the materials in order to prevent the strip of material and the materials from coming into close contact with each other. It has been widely used in the industry.

In order to increase the operating rate of the assembly machine that manufactures assemblies by winding and stacking strip materials and to save manpower for splicing materials, the next new stock roll is made while the strip material is being unwound. A device for automatically connecting the terminal end of the prepared material and the starting end of the next material when the material currently in use is finished is disclosed in the above-mentioned Japanese Patent Application Laid-open No. 137749/1983.

However, in the conventional device described above, since the strip material is a special material used for the bead,
Since the strip material itself is directly drawn out and driven, and the leading end of the next material is simply placed freely on the pedestal, the problems described below have not been solved.

That is, the contents of stock rolls used in the industry include extruded products, rolled products, etc. in the form of strips, and directly drawing and driving the strip material itself causes a problem in that the width or gauge of the material changes. Furthermore, many extruded and rolled products have nonuniform cross-sectional shapes, and many have different compositions combined through multicolor extrusion or lamination.

Therefore, if left undisturbed by differences in shrinkage rates due to residual stress and composition differences, it often does not form a straight band.

When winding on an assembly machine, there are some machines that supply the assembly symmetrically with respect to the axial direction of the assembly, and in that case, it is necessary to install one set of unwinding devices on the left and one on the left. Therefore, it is necessary to make the unwinding device compact.

Also, since the preparation of the next material is done while one stock crawl is in use, it is necessary to take measures to ensure that the work can be carried out safely.

In addition, the above-mentioned conventional device is composed of a plurality of material feeding sections, a material end detection section, a leading end setting section for the next material, a material crimping section, an unwinding drive section, etc. Usually, when preparing the next strip of material, pull out the next material,
There is no mechanism to forcibly grip the tip of the drum by simply placing it on a plate-like table, and when considering the preparation work for the next material, if the material feeding section moves in parallel, When it is necessary to supply materials to the left and right units, there is a problem that there is not enough space between the left and right units, resulting in strain, which makes the work difficult and dangerous.

[Purpose of invention]

This invention was devised by focusing on such conventional problems, and its purpose is to automatically join the strip material without elongating it, so that the ends of the strip material can be joined automatically. Provides a splicing device for a belt-like material unwinding device that can splice with high accuracy without deforming, has good workability and high safety, and can perform splicing work efficiently. It is something to do.

[Structure of the idea]

In order to achieve the above object, this invention provides a joining device between the centering mechanism and the material feed roll, which joins the rear end of the previous strip-shaped material and the leading end of the next strip-shaped material, and this joining device , an upper clamp mechanism and a lower clamp mechanism that alternately clamp the upper and lower surfaces of the leading end of the next strip-shaped material and are movable in the width direction of the strip-shaped material, and the upper clamp mechanism is attached to the rear end of the previous strip-shaped material. The upper clamp is composed of a crimping mechanism that crimps and joins the tip of the next band-shaped material held by the mechanism or the lower clamp mechanism, and a holding mechanism that holds this crimping mechanism movably in the width direction of the band-shaped material. The mechanism and the lower clamp mechanism are provided with a gripping claw consisting of an upper claw and a lower claw that are biased together in the direction of clamping the strip-shaped material, and the tip of the strip-shaped material is released from the grasping claw during the crimping operation of the crimping mechanism. The gist of this is that it is configured to allow

[Example of idea]

Embodiments of the present invention will be described below based on the accompanying drawings.

Figure 1 shows the entire unwinding device in which this invention was implemented, 1 is the unwinding device, and 2 is the machine frame. It forms a box with a shallow depth.

The machine frame 2 has stock rolls 3a, 3 on which are wound strip materials 4a, 4b and liners 5a, 5b.
b is removably attached, and separate rolls 6a, 6b are mounted on these stock rolls 3a, 3b.
and liner take-up rolls 7a, 7b, and liner take-up rolls 8a, 8b, respectively.

In FIG. 1, reference numerals 9a and 9b are centering mechanisms for belt-shaped materials 4a and 4b, which will be described later.The belt-shaped materials 4a and 4b that have been centered by these centering mechanisms 9a and 9b are passed through a joining device 19, which will be described later. The material is supplied to a material supply device (not shown) via a feed roll 10 and a feed control mechanism 11.

Note that the individual mechanisms on the unwinding side and the winding side are substantially the same as those of the conventional device, and detailed explanations thereof will be omitted.

The material feeding roll 10 and the liner take-up roll 7
a, 7b and liner take-up rolls 8a, 8b are driven by a geared motor 13 with a variable speed brake installed on the support member 2a of the machine frame 2.

That is, geared mode 13 and material feed roll 1
0 is connected via a chain 14, and the material feed roll 10 and liner take-up rolls 8a, 8b are
They are connected via a chain 15. Similarly, the liner take-up roll 8a and the liner take-up roll 7a are connected via a chain 16a, and the liner take-up roll 8b and the liner take-up roll 7b are connected via a chain 16b. A clutch (not shown) is attached to the shaft end of each roll, so that it is possible to select whether or not to drive each roll shaft.

In this embodiment of the invention, the material feed roll 10 and the liner take-off rolls 7a and 7b are at the same speed.

Further, the winding speed of the liner take-up rolls 8a and 8b increases as the winding diameter increases, but the torque of the clutch is adjusted so that the liner can be wound in accordance with the liner take-up speed. With such a mechanism, it is possible to freely drive either the stock roll 3a side or the 3b side.

Further, in FIG. 1, 17a and 17b are first end detectors for the strip material.

Note that a base plate 18 is provided on the upper part of the machine frame 2, and the centering mechanism 9
a, 9b, and a joining device 19 are attached.

Since the unwinding device 1 is configured as described above, the strip material 4a and the liner 5a unwound from the stock roll 3a are once separated by the separate roll 6a. The liner is then merged again at the take-up roll 7a and then wound around the liner take-up roll 8a, and the strip-shaped material 4a passes through the centering mechanism 9a, the material feed roll 10, and the feed-out control mechanism 11 to reach the material supply device. The stock roll 3a shown in FIG. 1 is in a state where there is little left.

Meanwhile, during this time, the stock roll 3b is set, the separate roll 6b, and the liner take-up roll 7.
b, the liner is wound onto the take-up roll 8b. The material passes through the centering mechanisms 9b and 9a and the tip is clamped in the upper clamp 12, completing the preparation.

Next, the centering mechanisms 9a, 9b and the joining device 19 will be explained based on FIGS. 2 and 3.

A block 22 is mounted on a bracket 20 fixed to the lower part of the base plate 18 via sliding bearings 21a and 21b. Block 2
A threaded projection 23 is attached to 2, and a threaded rod 24 is screwed into the threaded hole. Both ends of the threaded rod 24 are rotatably supported by projections 25 fixed to the ends of the base plate 18 and the bracket 20, respectively, via bearings.

A permanent magnet 27 is attached to the flange portion 26 of the block 22. Further, a guide plate 29 is rotatably supported on the block 22 via hinges 28a and 28b. Normally, the guide plate 29 is attracted to the permanent magnet 27 and stands upright as shown in FIG. At the top of the guide plate 29, there are bosses 30a,
30b are formed, and guide rollers 31a,
31b is held vertically.

A handle 32 is connected to the upper end of the guide rollers 31a and 31b. Therefore, the threaded rod 24
If you grasp the front end 24a of the guide plate 2 and turn it, the guide plate 2
9 moves toward and away from the base plate 18. Also, when preparing the next strip material 4a, 4b, use the handle 3.
Just grab 2 and knock it down towards you.

Here, 33 is a plurality of two-way rotating free rollers, and 34 is a free roller that is held on the base plate 18 in a cantilevered manner.

35 is a lower second end detector such as a phototube, 36 is an upper second end detector such as a phototube, and 37 is a reflecting plate.

Although the centering mechanism 9b is partially shown, it has a similar structure to the centering mechanism 9a, and the bracket 38 fixed to the base plate 18 has sliding bearings 39a and 39b (39b is not shown). A block 40 is mounted via the block 40.

The block 40 has a threaded projection 41.
is attached, and a threaded rod 42 is screwed into the threaded hole. Both ends of the threaded rod 42 are rotatably supported via bearings by protrusions 43 fixed to the ends of the base plate 18 and the bracket 38, respectively, and a handle 4 is attached to the shaft end on the near side in FIG.
4 is installed. A bracket 45 is fixed to the block 40, and a guide roll 46 is held vertically. Therefore, when the handle 44 is turned, the guide roll 46 moves toward and away from the base plate 18.

One end of the shaft of a free roller 49 is held by an elongated side plate 48 which is fixed at one end of tie rods 47a and 47b (47b not shown) which is fixed at the other end of the base plate 18. The other end of the shaft of the free roller 49 is inserted into a boss 50 fixed to the base plate 18, and forms a horizontal support surface for the strip material 4b.

On the other hand, the base plate 18 has a rectangular notch 51, and a guide roller 53 is vertically held on a bracket 52 fixed above the notch 51, and faces the guide roller 46 on the front side.

Next, the joining device 19 has clamp mechanisms 1 on top and bottom.
2, 72 are arranged, and the upper clamp mechanism 1
2, there is a sliding bearing 55 held by a bracket 54 attached to the base plate 18, and the rear end thereof extends through an opening 56 of the base plate 18. A permanent magnet 5 is attached to a bracket 57 attached to the fixed side of the end.
8 is fixed and the bracket 59 is attached to the movable side.
It absorbs and holds the material and prevents sliding. In addition, the sliding bearing 5
Brackets 60a and 60b are placed on the movable side of 5 and pivotally support a shaft 61.

As shown in FIGS. 4 and 5, an upper claw 69 constituting a gripping claw is integrally engaged with the shaft 61, and a lower claw 63 is rotatably supported. The lower claw 63 is urged by a coil sprocket 64 so as to strongly contact the upper claw 62. A notch 65 is provided in the central boss portion of the upper claw 62, into which a leg portion of a T-shaped latch 67 constituting a gripping mechanism pivotally supported by a bracket 66 is fitted. The other end of a leaf spring 68 whose one end is fixed to the bracket 66 is inserted into the right end of the latch 67, and is biased so that the leg of the latch 67 bites into the notch 65 of the upper claw 62. There is.

As shown in FIG. 3, a lever 69 is fixed to the front end of the shaft 61, and coil springs 70a and 70b are interposed between it and the bracket 60a and between the bracket 60b and the upper claw 62, and 62 is biased to rotate counterclockwise.
71 is a stopper when the upper claw 62 is rotated clockwise. When the lever 69 is pulled in the direction of the arrow in FIG. 3, the upper claw 62 and the lower claw 63 can be slid and bent toward the front.

The lower clamp 72 has the same mechanism as the upper clamp 12 except for the claw portion, so a description thereof will be omitted. lower nail 7
3 is fixed to a moving part of a sliding bearing 55. The upper pawl 74 is rotatably supported, and a central boss portion has a notch 75 into which one end of a latch 77 pivotally supported on a bracket 76 is fitted. The latch 77 is biased by a coil spring (not shown) so as to bite into the notch 75. A sliding bearing 55 is attached to the other end of the latch 77.
The rod of an air cylinder 79 held by a bracket 78 attached to the moving side of the cylinder is in contact with the rod in the returned state. The upper claw 74 is biased to rotate clockwise by a coil spring (not shown), so when the rod of the air cylinder 79 is protruded, the latch 77 is released and rotated to the position shown by the imaginary line. do.

Next, to explain the crimping mechanism, a bracket 80 fixed to the base plate 18 holds two guide rods 81a and 81b above and below, and a threaded rod 8 constituting the holding mechanism is located between them.
2 is rotatably supported by a bearing. A handle 83 is attached to the front end of the threaded rod 82. A sliding block 85 is held on the guide rods 81a, 81b via bearings 84a, 84b, and a threaded rod 82 is inserted into the threaded hole in the protrusion.
are screwed together.

An air cylinder 86 is attached vertically downward to one end of the sliding block 85, a crimping plate 87 of a crimping mechanism is fixed to the block provided at the tip of the rod, and an elastic block 88 is mounted on the surface. It is pasted. A kicker 89 is attached to the crimp plate 87, which comes into contact with the latch 67 when the crimp plate 87 is lowered.

Further, one end of a bracket 90 constituting a locking mechanism is fixed to the lower surface of the sliding block 85, and an air cylinder 91 is mounted vertically downward at the other end. A fork end 92 is locked to the tip of the rod and rotatably holds a presser roller 93. When the rod of the air cylinder 91 is extended, the presser roller 93 comes into contact with the material feed roll 10 and clamps the strip-shaped material.

Next, the operation of this device constructed as described above will be explained.

First, as shown in FIG. 1, the strip material 4a is unwound from the stock roll 3a and sent to the assembling machine, and finally, when the end portion reaches the first end detector 17a, the detector is activated and the signal is sent to the assembly machine. Geared motor 1
3 rotation changes to low speed. Then, the terminal end is sent to the right at a low speed, and when it reaches the lower second terminal end detector 25 in FIG.
Prevents falling due to slips at the end. The strip material 4a may be stopped here, or may be further fed by driving the material feed roll 10 and using a timer to the optimal position for joining.

On the other hand, while the stock roll 3a is being used, the next new strip material 3b is set by the material supplier, and the liner take-up roll 7b and liner take-up roll 8b are selectively driven to remove the strip material 4b. Pull out the tip and secure enough length to reach the upper clamp 12. Next, in Figure 3, the lever 69
Pull in the direction of the arrow to remove the upper claw 62 and lower claw 63. Grasp the handle 32 and rotate the guide plate 29 horizontally, then insert the tip of the strip material 4b between the upper claw 62 and the lower claw 6.
3, press the lever 69 and release the upper claw 62.
After returning the lower claw 63 to its original position and arranging the strip material 4b between the guide rollers 46 and 53, the guide plate 29 is re-erected and the preparation work is completed.

Then, the preparation of the next strip material 4b is completed, and the end of the strip material 4a in use is connected to the joining mechanism 19.
When it stops near , the air cylinder 86 is activated and the pressure bonding plate 87 is lowered.

When the kicker 89 comes into contact with one end of the latch 67 during the descent, the legs of the latch 67 come off and the upper claw 62 and lower claw 63 try to rotate counterclockwise. The crimping plate 87 and the elastic block 88 come down and press the tip of the strip material 4b downward, so that the material is transferred to the upper claw 62 and the lower claw 6.
At the same time as it is released by 3, it is pressed against the terminal end of the strip material 4a, and the joining operation is completed.

Note that the operation for the lower clamp 72 is almost the same, so redundant explanation will be omitted, but when joining the end of the strip material 4b to the tip of the strip material 4a, the crimping plate 87 and the elastic block 88 are used. By protruding the rod of the air cylinder 79 in accordance with the descent of the strip material 4, the upper claw 74 rotates to the position shown by the imaginary line in FIG.
Release a.

When the bonding is completed, the pressure plate 87, elastic block 88, and presser roller 93 return to their original positions, and the assembly machine resumes its work in response to that signal. Even if the end appears during the winding operation of the assembly machine, if the winding is completed without the detector of the feed-out control mechanism 11 being activated due to the slack of the feed-out control mechanism 11, the assembly machine Next, the process moves on to winding another strip material 4b, and in the end, it is sufficient to perform the joining within one cycle of the assembly operation, and the assembly machine is operated continuously without stopping.

[Effect of idea]

In this invention, a joining device is provided between the centering mechanism and the material feed roll as described above, which joins the rear end of the previous strip-shaped material and the leading end of the next strip-shaped material. An upper clamp mechanism and a lower clamp mechanism that alternately clamp the upper and lower surfaces of the tip of the strip material and are movable in the width direction of the strip material, and the upper clamp mechanism or The upper clamp mechanism and The lower clamping mechanism is provided with a gripping claw consisting of an upper claw and a lower claw that are biased together in the direction of clamping the strip-shaped material, and when the crimping mechanism performs the crimping operation,
Since the tip of the strip material is released from the gripping claw, the following excellent effects can be achieved.

(a) It is possible to perform splicing with high precision without giving any stretch to the tip of the strip material, and it also improves work safety because hands do not come close to the strip material being used or the crimped part of the strip material. It can be increased.

(b) When preparing the next strip of material for replenishment,
This is done after pulling out the gripping mechanism towards you.
It has extremely good workability and is safe.

(c) Band-shaped materials such as extruded materials may be deformed by bending, shrinking, etc., and accurate and reliable jointing cannot be expected by grasping the tip of the strip-shaped material as described above. I can do it.

(d) The accuracy of the end stop position of the strip material can be improved,
The rear end of the previous band-shaped material and the leading end of the next band-shaped material can be reliably joined. In addition, the upper clamp mechanism, the lower clamp mechanism, and the crimping mechanism are configured to be movable in the width direction of the strip material, so their positions can be easily adjusted according to the width of the strip material, and various It is possible to join strips of material with a width of .

[Brief explanation of the drawing]

Figure 1 is a front view of a belt-shaped material unwinding device that implements this invention, Figure 2 is an enlarged front view of the joining mechanism, Figure 3 is a plan view of Figure 2, and Figure 4 is an enlarged view of the gripping mechanism. The plan view, FIG. 5, is a sectional view taken along the - line in FIG. 4. 1... Unwinding device, 3a, 3b... Stock roll, 4a, 4b... Strip material, 5a, 5b...
Liner, 9a, 9b...centering mechanism, 10
...Material feeding roll, 11...Feeding control mechanism, 19...Joiner groove, 62...Upper claw, 63...
Lower claw, 67... T-shaped hook, 68... Leaf spring, 82... Threaded rod, 83... Handle, 86...
...Air cylinder, 87...Crimping plate, 88
...Elastic block, 91...Air cylinder,
93... Presser roller, 12... Upper clamp, 7
2...Lower clamp.

Claims (1)

[Scope of utility model registration request] In an unwinding device for a strip material, the strip material unwound from a stock roll is separated from a liner, and the strip material is supplied to a material supply device via a centering mechanism, a material feed roll, and a feed control mechanism. , a joining device is provided between the centering mechanism and the material feed roll to join the rear end of the previous strip-shaped material to the leading end of the next strip-shaped material, and this joining device connects the leading end of the next strip-shaped material. an upper clamp mechanism and a lower clamp mechanism that alternately clamp the upper and lower surfaces of the strip material and are movable in the width direction of the strip material; and a rear end of the strip material that is clamped by the upper clamp mechanism or the lower clamp mechanism. The method is comprised of a crimping mechanism that crimps and joins the tip of the next strip-shaped material, and a holding mechanism that holds this crimping mechanism movably in the width direction of the strip-shaped material, and the upper clamp mechanism and the lower clamp mechanism are A gripping claw consisting of an upper claw and a lower claw is provided which are biased together in a direction to clamp the strip-shaped material, and when the crimping mechanism performs the crimping operation,
1. A splicing device in a belt-like material unwinding device, characterized in that the tip of the belt-like material is released from a gripping claw.