JPS621886B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention involves wrapping a continuous tape around a group of articles while forming a loop around the group of articles, and then wrapping the top end of the continuous tape overlapping at the point where the loop is closed. The present invention relates to a binding machine that binds a group of articles by gluing them together, and more particularly to a tape tightening mechanism that removes slack in an unwound continuous tape and obtains a tightening force above a certain level.

Conventionally, as a binding machine for binding vegetable groups using a continuous tape such as a single-sided adhesive tape or a non-adhesive tape, a device disclosed in Japanese Utility Model Application Publication No. 10518/1983 is known.
The mechanism and operation of this binding machine are outlined below. That is, as shown in FIG. 5, tape supply mechanisms 72 are arranged at regular intervals on the surface of the base 71.
A binding arm 74 is pivotally supported between the base tape adhesive mechanism 73 and the base tape adhesive mechanism 73 so as to be able to rise and fall freely, and the base tape adhesive mechanism 73 is attached to the non-pivotally supported end side of the binding arm 74.
A binding arm-side tape bonding mechanism 75 is provided which cooperates with the tape bonding mechanism 75 to bond the ends of the tape loops formed around the group of articles 70. Binding arm 7
4, an article group holder 76 is provided at a constant height with respect to the base 71, and when the binding arm 74 is raised to its maximum extent, the binding arm side tape adhesion mechanism 75 and the base side The tape adhesion mechanism 73 is separated to the maximum extent possible, and these tape adhesion mechanisms 75,
During 73, the article group 70 is placed on the article group holder 76 while pressing the article group 70 against the continuous tape that has been unwound from the tape supply mechanism 72 and stretched. 70 to first form an open loop, and then, in the process of inverting the binding arm 74, the diameter of the open loop is reduced, and the binding arm side tape adhesion mechanism 75 and the base side tape are bonded. While in contact with the mechanism 73, the ends of the closed loop are glued and the closed loop is cut from the continuous tape, thereby binding the group of articles 70.

[Problems with conventional technology]

The above-mentioned conventional binding machine has a built-in tape tightening mechanism, and according to this tape tightening mechanism, the friction clutch 77 is activated when the binding arm 74 is inverted to a certain extent in the process of inverting the upright binding arm 74. When engaged, the tape wheel 78 in the tape supply mechanism 72 is rotated in the tape rewinding direction, and when a certain tension is generated in the rewound tape, the friction clutch 77 slips.

This binding method of setting the tensioning force of the tape at a constant level by the slip of the friction clutch 77 is suitable for a group of articles 77 that are bulky and whose resistance increases rapidly during the process of reducing the diameter of the tape loop.
When tying together, the tying diameter is too large, resulting in unsatisfactory results.

Furthermore, in the above-described binding machine, when pressing the article group 70 against the continuous tape stretched between the binding arm-side tape adhesion mechanism 75 and the base-side tape adhesion mechanism 73, if the tape is pressed too vigorously, the tape may be pushed against the tape wheel 78. The binding arm 74 is unrolled excessively from the
Accidents have also occurred in which the slack in the tape could not be removed during the inversion process.

Furthermore, the tape tightening mechanism of the above-mentioned binding machine does not have the function of removing tape slack that occurs irregularly.

[Technical problem of the present invention]

An object of the present invention is to provide a tape tightening force of a binding machine that can obtain strong tightening force by completely removing slack in the unwound continuous tape.

[Operation of the present invention]

With the above-mentioned means, the tape support plate is moved by the operation of the arm, and the tightening force is adjusted after the slack of the tape is taken up.

[Technical means of the present invention]

To achieve this objective, the present invention includes a base;
A tape wheel rotatably supported at one end of the base for unwinding the tape, a tape tightening timing mechanism that locks the tape wheel non-rotatably or rotatably releases it at a certain timing, and a tape tightening timing mechanism that is spaced apart from the tape wheel. A tape adhesion mechanism on the base side is provided on the base and grips the leading end of the tape, and a tape tightening timing mechanism is driven by a tape tightening timing mechanism that is pivoted to be able to rise and fall with respect to the base at a position close to the tape wheel. At the same time, there is a binding arm that binds a group of articles with unwound tape by raising and lowering operations, and a binding arm that is disposed on the non-pivot end side of the binding arm and works together with a base-side tape adhesion mechanism to converge the group of articles. There is a tape adhesion mechanism on the binding arm side that adheres the tape to close the tape loop, and a tape adhesion mechanism that lowers the binding arm when it is raised and rises when the binding arm falls down, thereby attaching the tape from the tape wheel to the base side. It is characterized by comprising a tape support in which the length of the tape running path leading to the tape adhesion mechanism increases as the amount of collapse of the binding arm increases.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4. FIG. 1 shows the entirety of a binding machine 2 that uses a single-sided adhesive tape 1 coated with adhesive on one side of the tape as a binding tape. 1) located on the left end side of the base 3 in FIG. 5 is adjacent to the tape supply mechanism 4, and a base-side tape adhesion mechanism 6A is provided on the rear end side of the base 3 (the right end side of the base 3 in FIG. 1). Between the tape supply mechanism 4 and the base-side tape adhesion mechanism 6A, a binding arm 7, which can be lowered and raised by an operator, is pivotally supported on a support 8 by a pivot 15. On the non-pivot end side of the binding arm 7, a binding arm side tape adhesion mechanism 6 works together with the base side tape adhesion mechanism 6A to overlap and adhere both ends of the loop formed by the single-sided adhesive tape 1.
B is provided.

A bracket 9 is erected on the upper surface of the support column 8, and a pivot 10 is provided on the upper part of the bracket 9. A tape support 11, which forms part of the link mechanism, is pivotally supported by the pivot 10. Tape guide pin 1 is attached to the tip of tape support 11.
2 are arranged. The tape support 11 is bent slightly toward the rear at the portion pivoted on the pivot 10, and furthermore, a long hole 13 is formed in the lower end of the tape support 11 in the longitudinal direction of the tape support 11. . A pin 14 fixed to the binding arm 7 is engaged with the elongated hole 13 so as to form a sliding pair.

Since the tape support 11 and the binding arm 7 form a link mechanism as described above, when the binding arm 7 is operated to fall down (rotated clockwise in FIG. 2) about the pivot shaft 15, The tape support 11 stands up, and when the binding arm 7 is operated to stand up (rotate counterclockwise in FIG. 2) about the pivot shaft 15, the tape support 11 falls down.

The single-sided adhesive tape 1 unwound from the tape supply mechanism 4 comes into contact with the tape guide pin 12, passes through the binding arm-side tape adhesion mechanism 6B, and is gripped by the base-side tape adhesion mechanism 6A at the tip end 1a. A tape running path whose total length is variable is formed. The length of this tape running path increases as the tape support 11 rises from the laid down position. For this reason, if the binding arm 7 is lowered while the single-sided adhesive tape 1 unwound from the tape supply mechanism 4 is maintained at a constant length, the tension of the single-sided adhesive tape 1 increases rapidly.

At a lower position of the binding arm 7, an article is supported so as to protrude to the front of the base 3 (to the left in FIG. 1) from a tape crimping stand 16 that constitutes a part of the base-side tape adhesion mechanism 6A. A cradle 17 is provided.

As shown in FIG. 3, the binding arm 7 consists of two arm side plates 7a and 7 whose lower sides are curved concavely.
b, and the tip portions of these arm side plates 7a and 7b (in Fig. 3, the arm side plates 7
Tape guide pin 1 is attached to the left end part of a and 7b)
8 are arranged. This tape guide pin 18
A return tension spring 20 is disposed between the spring hook 19 and the spring hook 19 provided at the lower end of the support column 8.
This return tension spring 20 is for raising the binding arm 7.

As shown in detail in FIGS. 2 and 3, the tape supply mechanism 4 includes a wheel support plate 21 erected on the base 3 at a position forward of the support column 8;
A tape wheel 22 rotatably supported by this wheel support plate 21 and this tape wheel 22
The wheel gear 24 is rigidly connected to the wheel shaft 23 of the wheel. A winding tape 26 wound in an annular shape is attached to the tape wheel 22 via a wheel adapter 25.

Since the tape wheel 22 is integrated with the wheel gear 24, when the wheel gear 24 engages with the book plate 27 as a locking member and is prevented from rotating, it becomes unable to rotate. When released, it becomes free to rotate under the tension of the single-sided adhesive tape 1.

The tape supply mechanism 4 is driven by a tape tightening timing mechanism 5. The tape tightening timing mechanism 5 includes a fan-shaped timing operation base plate 29 fixed to the binding arm 7 by a rectangular bracket 28 and a tape wheel rotation stopper mechanism 30.
have.

A hook release operation plate 31 is fixed to the lower end portion of the timing operation base plate 29, and protrudes downward toward the tape wheel rotation prevention mechanism 30.

A timing operating pawl 33, which is an operating member of the hook plate 27 and has an approximately L-shaped side surface, is pivotally disposed on a radius that approximately bisects the arc of the timing operating base plate 29 by means of a pin 34. A stopping screw 32 is screwed onto the timing operation base plate 29 at a position behind the pin 34, and the stopping screw 32 and the timing operation claw 33 are screwed together.
A torsion coil spring 35 is disposed between the one end 33a and one end 33a. The timing operation pawl 33 is always biased counterclockwise in FIG. 2 by this torsion coil spring 35. The other end 33b of the timing operation pawl 33 abuts against the stopping screw 32 from below, so that the timing operation pawl 33 remains stationary at a fixed position when not in operation.

The tape wheel rotation prevention mechanism 30 includes a hook plate 27, a hook shaft 36 that rotatably supports the hook plate 27, and a tape wheel 22.
Timing plate 3 for setting the stop timing of
7. A torsion coil spring 38 disposed between the hook plate 27 and the timing plate 37 and assembled to the hook shaft 36, and a fixed hooking plate 3 with which the timing plate 37 engages or disengages during rotation.
9 and the timing plate 37 from rotating beyond a certain limit.

As shown in Figure 2, a square fixed plywood board 3
9 is fixed to the wheel support plate 21, and this fixed hooking plywood 39 has three fan-shaped hooking holes 4 at regular intervals on the circumference centered on the hook shaft 36.
1 is formed.

Both the hook plate 27 and the timing plate 37 are rotatably assembled to the hook shaft 36. One end 38a of the torsion coil spring 38 disposed between the hook plate 27 and the timing plate 37
is hooked to the rear surface 27a of the hook plate 27 (the right end surface side of the hook plate 27 in FIG. 37).

The timing plate 37 is assembled to the hook shaft 36 adjacent to the fixed plywood 39, and the timing plate 37
As shown in FIG. 3, the compression coil spring portion 38c of the torsion coil spring 38 disposed between the hook plate 27 and the timing plate 37 causes the hook shaft 36 to be moved farthest from the assembly position of the timing plate 37. It is attached to the tip of the Hook shaft 36
A flat washer 42 is fixed to the tip of the hook plate 27 with a bolt 43, and this flat washer 42 serves to prevent the hook plate 27 from coming off.

On the front side of the hook plate 27, and
A retaining plate 44 that comes into contact with the front face portion 37b of the timing plate 37 is formed at the lower end portion.

The torsion coil spring 38 biases the hook plate 27 against the timing plate 37 in the counterclockwise direction in FIG.

There is a fixed plywood board 39 on the back side of the timing board 37.
Three protrusions 45 are formed corresponding to the three engaging holes 41 (see FIG. 4). Due to the fitting relationship between the protrusion 45 and the engagement hole 41, the rotating timing plate 37 stops at a fixed position.

An engaging pawl 46 is provided on the upper end side of the timing plate 37 to protrude toward the tape tightening timing mechanism 5. At the lower end side 46a of this engaging claw 46, the timing operating claw 33 engages with the engaging claw 46 while rising clockwise in FIG. 2 from below the position shown in FIG. Rotate the quantity timing plate 37 counterclockwise.
The engaging claw 46 is formed to protrude in a trapezoidal shape with respect to the timing plate 37, and is similar to the timing operating claw 33.
While descending from the position shown in FIG. 2 in the counterclockwise direction in FIG. Avoid the engaging claw 46 while contacting the claw outer peripheral portion 46b corresponding to the upper side of the trapezoidal shape of the engaging claw 46.

The engaging pawl 46 is located on the upper end side of the timing plate 37.
A positioning groove 47 is formed in a portion close to the. A stopping plate spring 40 having a substantially U-shaped cross section that cooperates with the positioning groove 47 is attached to the wheel support plate 2.
It is arranged at the upper end of 1.

The timing plate 37 has a hook release receiving arm 48 that projects downward, and a roller 49 is pivotally supported at the tip of the hook release receiving arm 48 (the lower end of the hook release receiving arm 48 in FIG. 2). . A simple pin may be used instead of the roller 49. This roller 49 is a driven cam of the hook release operation plate 31.

A hook beak 50 is formed at the upper end of the hook plate 27, which is integrally assembled to the timing plate 37 by the torsion coil spring 38 and the latching plate 44. By inserting this hook beak 50 between the teeth of the wheel gear 24, the wheel gear 24 is locked from rotating. Even when the hook beak 50 hits the tooth tip of the wheel gear 24, the tension of the single-sided adhesive tape 1 is gradually increasing because the binding arm 7 is in the process of falling down, and this increase in tension causes the tape wheel to 22 is slightly rotated, thereby dropping the hook beak 50 between the teeth of the wheel gear 24.

Hereinafter, the operation of the tape tightening mechanism of the present invention will be explained. First, when the binding arm 7 is erected to the maximum extent by the spring force of the return tension spring 20, the tape support 11 is in the position shown by the dashed line in FIG. It is stationary at a position lower than the engaging claw 46 of No. 37. At this time, the protrusion 45 of the timing plate 37 is inserted into the engagement hole 41 of the fixed engagement plate 39, so that the timing plate 37 remains stationary. The condition of this timing plate 37 is exactly the same as that shown in FIG. 2, and the hook beak 50 of the hook plate 27 is not engaged with the wheel gear 24. Therefore, the tape wheel 22 is in a free rotation state.

When the binding arm 7 is in its maximum upright position, the single-sided adhesive tape 1 unwound from the tape wheel 22 of the tape supply mechanism 4 is attached to the tape guide pin 18 and the tape support 11 at the tip of the binding arm 7.
The tape is stretched without slack between the tape guide pin 12, the binding arm-side tape adhesion mechanism 6B, and the base-side tape adhesion mechanism 6A. In particular, the binding arm side tape adhesion mechanism 6B and the base side tape adhesion mechanism 6A are separated as much as possible, and these tape adhesion mechanisms 6
A single-sided adhesive tape 1 is stretched in a straight line between A and 6B. Adhesive side 1 of this single-sided adhesive tape 1
When the operator places a group of articles, such as a group of vegetables, on the article holder 17, the single-sided adhesive tape 1 is further removed from the wrapping tape 26 attached to the freely rotating tape wheel 22. It is unwound by overcoming the adhesive resistance of 1 itself.

Even when an operator presses a group of articles too forcefully against the adhesive side 1b of the single-sided adhesive tape 1 and excessive single-sided adhesive tape 1 is unwound from the wrapping tape 26, the single-sided adhesive tape 1 is removed from the wrapping tape 26. Since adhesive resistance acts upon detachment, the amount of excess unwinding is limited to a small amount. That is, the tape support 11
The amount of excess unwinding does not exceed the amount that is sufficiently absorbed while moving from the collapsed position to the upright position.

Next, when the operator lowers the binding arm 7, the timing operation base plate 29 rotates clockwise around the pivot shaft 15 together with the binding arm 7. As a result, the timing operation claw 33
While moving counterclockwise about the pivot shaft 15, one end 33a engages with the engaging pawl 46 of the timing plate 37, and rotates the timing plate 37 counterclockwise.

The hook plate 27 rotates counterclockwise around the hook shaft 36 in unison with the timing plate 37, and when the hook plate 27 rotates slightly from the position shown in FIG. It is inserted between the teeth, thereby locking the wheel gear 24 against rotation.

Further, in the process of the binding arm 7 being lowered, the timing plate 37 is further rotated counterclockwise against the spring force of the torsion coil spring 38, and the timing plate 37 is rotated counterclockwise against the spring force of the torsion coil spring 38.
7 engages the stopping leaf spring 40, the rotation of the timing plate 37 is stopped. In this state of the timing plate 37, the timing plate 3
7 is stationary at a position slightly away from the hook plate 44 in the counterclockwise direction. The hook beak 50 of the hook plate 27 is biased by the torsion coil spring 38, so that the hook beak 50 of the hook plate 27 is more strongly attached to the wheel gear 24.
pressed against.

Immediately after the positioning groove 47 of the timing plate 37 engages with the stopping leaf spring 40, the timing operation pawl 33 separates from the engagement pawl 46 of the timing plate 37.

As the binding arm 7 is lowered, the tape support 11 is positively raised, and the length of the tape running path is gradually increased. Moreover, the tape wheel 22
is locked so that it cannot rotate, so the length of the unwound single-sided adhesive tape 1 does not change. The slack of the adhesive tape 1 is absorbed, and the tension of the single-sided adhesive tape 1 is reliably increased, providing a strong tightening force to the group of articles.

After the group of articles is bundled, the loop of the single-sided adhesive tape 1 around the group of articles is closed, and the ends and middle portions of the overlapped single-sided adhesive tapes 1 are separated from the continuous single-sided adhesive tape 1, they are further bundled. When the arm 7 is moved downward, the hook release operation plate 3
1 presses the roller 49 at the lower end of the timing plate 37 in the counterclockwise direction, thereby causing the timing plate 37 to
The engagement between the positioning groove 47 and the stopping leaf spring 40 is released. As a result, hook plate 27
The force that locks the wheel gear 24 disappears.

[Effects of the present invention]

As described above, according to the present invention, the tape wheel that unwinds the tape is locked so that it cannot rotate, and the length of the tape running path is changed by the movement of the tape support while the length of the unwound tape is maintained constant. As the tape becomes longer, slack in the tape is removed and a strong tightening force is obtained.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view of a binding machine incorporating the tape tightening mechanism of the present invention, FIG. 2 is a detailed side view of the tape tightening mechanism, and FIG. 3 is a plan sectional view of the tape tightening mechanism. FIG. 4 is a sectional view showing the relationship between the timing plate and the fixed plywood. FIG. 5 is a schematic side view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Single-sided adhesive tape, 1a... Tip part, 2... Binding machine, 3... Base, 5... Tape tightening timing mechanism, 6A... Base side tape adhesion mechanism, 6B... Binding arm side tape adhesion mechanism, 7... Binding arm , 11...
Tape support, 12... Tape guide pin, 22
...Tape wheel, 24...Wheel gear, 26...
Wrapping tape, 27... Hook plate.

Claims (1)

[Claims] 1. A base, a tape wheel rotatably supported at one end of the base for unwinding the tape, and a tape tightening timing mechanism that locks or releases the tape wheel non-rotatably at a certain timing. , a base-side tape adhesion mechanism that grips the tip of the tape provided on the base at a distance from the tape wheel, and a tape that is pivotably supported on the base so as to be able to rise and fall at a position close to the tape wheel. A binding arm that drives a tightening timing mechanism and binds a group of articles with unwound tape by raising and lowering operations, and a binding arm that is disposed on the non-pivot end side of the binding arm and works together with a tape adhesion mechanism on the base side. a binding arm-side tape adhesion mechanism for adhering tape to close a loop of tape converging a group of articles;
A tape support that stands up when the binding arm falls down so that the length of the tape running path from the tape wheel to the base-side tape adhesion mechanism increases as the binding arm falls down. A tape tightening mechanism of a binding machine consisting of.