JP4240784B2 - Banding packing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a banding packing machine, and more specifically, a banding packing machine capable of correctly controlling the operations of a right pressing member, an intermediate pressing member, and a left pressing member provided for binding bands with a small number of parts. It is about.
[0002]
[Prior art]
In an automatic or semi-automatic banding and packing machine, a band pulled out from a band reel is wound around an item to be packed, clamped, subsequently pulled back to the band supply side, tightened, and then abbreviated as cutting. At the same time, the bound portion melted by the heater is pressure-bonded by a press. These operations are usually timed by a cam mechanism.
[0003]
FIG. 8 and FIG. 9 show the structure of the control unit A that performs operations such as clamping, welding, and cutting of the band tip portion based on a cam mechanism in a conventional banding packing machine.
In this control part A, three members, a right pressing member 2, a left pressing member 4, and an intermediate pressing member 6, are formed from a casting or the like in the vicinity of the lower end of the slide table 1 below the upper table on which the article to be packed is placed. It is accommodated in the integrally formed support block 8. The support block 8 is supported by the screw member 10 so as not to move between the pair of surface plates 12 and 14.
[0004]
On the other hand, rollers 16, 18, and 20 are attached to the lower ends of the right pressing member 2, the left pressing member 4, and the intermediate pressing member 6, and these rollers 16, 18, and 20 are provided on a common cam shaft 22. By contacting the cams 24, 26 and 28, the cams 24, 26 and 28 are configured to move up and down at a predetermined timing.
In the control portion A configured as described above, the tension springs 32, 34, and 36 are disposed between the right pressing member 2, the left pressing member 4, the middle pressing member 6, and the support block 8. Even when the rollers 16, 18, and 20 are moved up and down by the springs 32, 34, and 36, they are pulled so as not to be separated from the peripheral surfaces of the cams 24, 26, and 28, respectively.
[0005]
The tension springs 32, 34, and 36 are mounted close to the outside of the support block 8, one end is locked to the spring hooks 38, 40, and 42, and the other end is at a predetermined position of the spring hook pin 44. The right pressing member 2, the left pressing member 4, and the middle pressing member 6 are pulled downward by being locked.
On the other hand, another tension spring (not shown) is also passed between the spring hook 42 of the intermediate pressing member 6 and the spring hook 38 of the right pressing member 2. The cutter 46 is pulled toward the head 47 side of the right pressing member 2 so that the cutter 46 is well cut.
[0006]
[Problems to be solved by the invention]
By the way, in the control part A of such a conventional banding packing machine, as described above, the right pressing member 2, the left pressing member 4, and the middle pressing member 6 are provided with the tension springs 32, 34, and 36, respectively. It is equipped. Further, since the cutter is further cut by a separate tension spring between the middle pressing member 6 and the right pressing member 2, the control unit A as a whole requires a large number of tension springs and a large number of parts. There was a problem of becoming.
[0007]
Further, since the right pressing member 2, the left pressing member 4 and the middle pressing member 6 are formed in a cylindrical shape, the workability is good, but there is a possibility that the right pressing member 2, the left pressing member 4 and the middle pressing member 6 may slightly rotate when moving up and down. If these members rotate, the clamping operation and the cutting of the cutter become unstable, and there is a problem that the operations of these three pressing members 2, 4, 6 are adversely affected.
[0008]
In view of the above circumstances, an object of the present invention is to provide a banding packing machine that requires a small number of parts in a control unit.
[0009]
[Means for Solving the Problems]
To achieve the above object, the present invention provides:
By pulling the right pressing member, the left pressing member, and the intermediate pressing member, which are linearly arranged above the cam shaft substantially parallel to the extending direction of the cam shaft, to the cam shaft side by the urging force of the tension spring, A cam mechanism configured to abut each roller attached to the lower end of the right pressing member, the left pressing member, and the middle pressing member so as not to separate from the cam of the cam shaft, and to be configured between the cam shaft and the cam In the process of moving the right pressing member, the left pressing member, and the middle pressing member upward or downward by the operation of, the band tip guided to the upper end side of these three members is clamped with the slide table. Pull the band from the band supply side, tighten it, cut the band supply side, melt the band overlap with a heater, and then bond the band In the machine,
Of the right pressing member, the left pressing member, and the intermediate pressing member, the intermediate pressing member is protruded above the shoulder portion of the right pressing member by projecting the head of the intermediate pressing member arranged at the center thereof. A tension spring that pushes down the intermediate pressing member toward the camshaft side and also serves as a tension spring that pushes down the right pressing member. Yes.
[0010]
With such a configuration, the total number of tension springs in the control unit can be reduced.
Here, one end of the dual-purpose tension spring is locked to the head of the intermediate pressing member, and the other end of the dual-purpose tension spring is passed so as to obliquely pass through the side surface of the right pressing member, It is preferable to pull the right pressing member together with the middle pressing member toward the cam shaft.
[0011]
With such a configuration, the tension spring for the cutter can be omitted.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a main part of a control unit of a banding packing machine according to an embodiment of the present invention.
The right presser member 50, the left presser member 52, and the intermediate presser member 54 of the present embodiment are formed such that the outer surface shapes of their body portions 56, 58, 60 are as shown in FIG.
[0013]
That is, the outer surface shape of the body portion 60 of the middle pressing member 54 disposed in the center has a pair of arc portions 60a and 60b facing each other and a pair of linear portions 60c and 60d facing each other, and has a cross section as a whole. It is formed in a substantially track shape.
On the other hand, the outer surface shape of the body portion 56 of the right pressing member 50 includes an arc portion 56 a and a straight portion 56 b, and the straight portion 56 b faces the straight portion 60 d of the intermediate pressing member 54.
[0014]
On the other hand, the outer surface shape of the body portion 58 of the left pressing member 52 includes a straight portion 58 a and an arc portion 58 b, and the straight portion 58 a faces the straight portion 60 c of the intermediate pressing member 54.
In addition, although the left pressing member 52 has a head and a trunk formed integrally, the head 62 and the trunk 56 of the right pressing member 50 and the head 64 and the trunk 60 of the intermediate pressing member 54 are: Each is formed separately. Further, a guide hole 98 through which the band B is passed is formed in the head 62 of the right pressing member 50. Further, rollers 63, 59, and 61 are supported on the lower surfaces of the right pressing member 50, the left pressing member 52, and the intermediate pressing member 54, respectively.
[0015]
Further, in the present embodiment, these three members 50, 52, 54 are accommodated in an integrally structured support block 66, and the support block 66 is attached to a pair of surface plates 78, 80.
The support block 66 has three continuous holes 68 that are formed by joining the above-described body portions 56, 58, and 60, and the three body portions 56, 58, and 60 can be slid in the 3 continuous holes 68. Inserting. Accordingly, since the right pressing member 50, the left pressing member 52, and the middle pressing member 54 are guided in the vertical direction while the planes are in contact with each other in the support block 66, the right pressing member 50, the left pressing member 52, and the intermediate pressing member 54 cannot be rotated inadvertently during the vertical movement. Absent. Further, when these body portions 56, 58, 60 are inserted into the support block 66, the rollers 63, 59, 61 protrude from the lower end portion of the three-hole 68.
[0016]
On the other hand, spring hooks 82 and 83 project from the side surfaces of the left presser member 52 and the intermediate presser member 54. On the other hand, a long spring hook pin 84 is inserted into the support block 66 disposed below the support block 66. A tension spring 86 is attached between the spring hook 82 and the spring hook pin 84 on the side of the left pressing member 52. By attaching the tension spring 86 in this way, the left pressing member 52 is pulled downward. Therefore, when the left pressing member 52 moves up and down, the roller 59 contacts the cam 74 and does not separate from the peripheral surface.
[0017]
Further, one end of a tension spring 88 is locked to the spring hook 83 provided on the intermediate pressing member 54, and the other end is locked to a spring hook pin 84 in the vicinity of the right pressing member 50. Therefore, the tension spring 88 is mounted obliquely between the middle pressing member 54 and the right pressing member 50.
Thus, the roller 61 of the intermediate pressing member 54 is always in contact with the cam 76 by the biasing force of the tension spring 88 mounted obliquely. Further, since the head portion 64 of the intermediate pressing member 54 is provided so as to partially protrude from the shoulder portion of the right pressing member 50, the right pressing member 50 is also pulled downward by the urging force of the tension spring 88. Therefore, the roller 63 of the right pressing member 50 is always in contact with the cam 72 by the tension spring 88.
[0018]
As described above, in the control portion A of the present embodiment, the two tension springs that have been required up to now are sufficient with the two tension springs 86 and 88, that is, three members, that is, the right pressing member 50 and the left pressing member. 52, the intermediate pressing member 54 can be pulled downward.
Further, in this embodiment, the cutter 90 of the intermediate presser member 54 is always pulled toward the right presser member 50, so that the cutter 90 is cut well.
[0019]
As shown in FIG. 4, the control unit A configured as described above is incorporated, for example, below a slide table 92 on which an article to be packed W is arranged. Note that a band guide 94 that can be freely moved in and out of the band traveling path is disposed on the lower surface of the slide table 92.
From the state of FIG. 4, the band B is inserted into the guide hole 98 of the right pressing member 50 and the guide passage 100 of the band guide 94 by the driving force of the band supply roller 96. When the tip of the band B wound in a loop shape comes into contact with the stopper 102, the right pressing member 50 is raised as shown in FIG. 5, and the band B is moved between the anti-slip portion 104 and the slide table 92. Hold it. When the band B is thus clamped, the band guide 94 is retracted from the band travel path.
[0020]
After the band guide 94 is withdrawn from the band travel path, the band B is forcibly removed from the band guide arch 106 when the band supply roller 96 is reversed in the direction of the arrow in FIG. Wrap around the object W. When the band B wraps around the article to be packed W, this time, the band B is further pulled and tightened. After tightening the band B, as shown in FIG. 6, the left presser member 52 is moved to the highest position, and the rear end of the band B is bound by the anti-slip portion 108 and the slide table 92 of the left presser member 52. Hold the side. In this state, the binding front end portion of the band B and the binding rear end portion face each other while maintaining a space in the vertical direction. As shown in FIG. 6, the heater 110 is inserted into the facing interval, the intermediate pressing member 54 is raised, the band B is cut, and the surface of the band B is melted. When the surface of the band B melts, as shown in FIG. 7, the intermediate presser member 54 is raised, and the melted portion is pressed to bond them together.
[0021]
Thus, in the present embodiment, the right pressing member 50, the left pressing member 52, and the middle pressing member 54 move up and down while linearly contacting within the support block 66 having the three continuous holes 68. There is no turning on the way.
Further, according to the present embodiment, when the left pressing member 52 moves up and down, the roller 59 is not pulled away from the cam 74 because it is always pulled downward by the tension spring 86. On the other hand, when the intermediate presser member 54 and the right presser member 50 move up and down, they are always pulled downward by the dual-purpose tension spring 88 mounted diagonally, so that the roller 61 of the intermediate presser member 54 and the roller 63 of the right presser member 50 Does not separate from the cams 76 and 72.
[0022]
Thus, according to the present embodiment, not only the intermediate pressing member 54 but also the right pressing member 50 can be pulled downward by the urging force of the combined tension spring 88. Note that when the right presser member 50 and the intermediate presser member 54 are lifted by the cams 72 and 76, the right presser member 50 has a smaller amount of movement, so that the normal operation of the intermediate presser member 54 is not hindered. Therefore, in this embodiment, the control portion A can be configured with the number of tension springs used as much as possible. Further, in this embodiment, since the double-use tension spring 88 is disposed obliquely, the cutter 90 can be cut without providing another tension spring between the intermediate pressing member 54 and the right pressing member 50. Good condition can be maintained. Therefore, the use of a tension spring for improving the cutting of the cutter 90 can be omitted.
[0023]
As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example at all. For example, in the above embodiment, the left pressing member 52, the middle pressing member 54, and the right pressing member 50 are accommodated in the support block 66, but the support block 66 is not essential. Moreover, in the said Example, the shape of the trunk | drum 56, 58, 60 of the right pressing member 50, the left pressing member 52, and the intermediate pressing member 54 is not limited to a cylindrical shape, A square shape may be sufficient.
[0024]
Of course, the present invention can be applied to both automatic packing machines and semi-automatic machines.
[0025]
【The invention's effect】
As described above, according to the banding machine according to the present invention, the right pressing member, the left pressing member, and the middle pressing member have been pulled downward by the three tension springs so far, and the respective rollers are attached to the respective cams. Although it was in contact, it can be done with two tension springs.
[0026]
Therefore, the number of parts of the control unit can be reduced.
Further, if the dual-purpose tension spring is diagonally passed between the middle pressing member and the right pressing member, the tension spring for improving the cutting of the cutter can be eliminated.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a control unit of a banding packing machine according to an embodiment of the present invention.
2 is an explanatory view showing the outer shape of the body of the left pressing member, the middle pressing member, and the right pressing member constituting the control unit of FIG. 1;
FIG. 3 is a front view showing a cam mechanism of the embodiment.
FIG. 4 is an explanatory diagram showing an initial state of a control unit when banding is performed.
FIG. 5 is an explanatory view showing a state at the time of band tightening when banding is performed.
FIG. 6 is an explanatory view showing a state at the time of welding when banding is performed.
FIG. 7 is an explanatory diagram showing a state at the time of band cutting when banding is performed.
FIG. 8 is an explanatory diagram showing a configuration of a conventional control unit.
FIG. 9 is a front view showing a conventional cam mechanism.
[Explanation of symbols]
50 Right pressing member 52 Left pressing member 54 Middle pressing member 60a, 60b Arc portion 60c, 60d Linear portion 56, 58, 60 Body portion 59, 61, 63 Roller 64 Head 66 Support block 68 Three communication holes 70 Cam shaft 72, 74, 76 Cam 86, 88 Tension spring 88 Tension spring 92 Combined with slide table 110 Heater A Cam mechanism B Band W Package

Claims (2)

By pulling the right pressing member, the left pressing member, and the intermediate pressing member, which are linearly arranged above the cam shaft substantially parallel to the extending direction of the cam shaft, to the cam shaft side by the urging force of the tension spring, A cam mechanism configured to abut each roller attached to the lower end of the right pressing member, the left pressing member, and the middle pressing member so as not to separate from the cam of the cam shaft, and to be configured between the cam shaft and the cam In the process of moving the right pressing member, the left pressing member, and the middle pressing member upward or downward by the operation of, the band tip guided to the upper end side of these three members is clamped with the slide table. Pull the band from the band supply side, tighten it, cut the band supply side, melt the band overlap with a heater, and then bond the band In the machine,
Of the right pressing member, the left pressing member, and the intermediate pressing member, the intermediate pressing member is protruded above the shoulder portion of the right pressing member by projecting the head of the intermediate pressing member arranged at the center thereof. A tension spring that pushes down the intermediate pressing member toward the camshaft side and also serves as a tension spring that pushes down the right pressing member. A strapping packing machine. One end of the dual-purpose tension spring is locked to the head of the intermediate pressing member, and the other end of the dual-purpose tension spring is passed so as to pass obliquely through the side surface of the right pressing member. The banding packing machine according to claim 1, wherein the right pressing member is pulled toward the camshaft side.

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