JPH0734810Y2 - Hermetic binding machine - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The present invention is, for example, a bag in which a bag made of a film of airtight synthetic resin is filled with contents, and the mouth of the bag is tightly sealed with staples. Concerning the binding machine.

<Prior Art> Conventionally, a polyethylene bag (hereinafter referred to as a poly bag) is filled with a solid content together with a liquid (for example, water), and the mouth portion of the poly bag is hermetically bound with one aluminum staple. A known seal binding machine is known (see Jitsuko Sho 63-8566).

This hermetic binding machine supplies staples by separating them one by one from a connecting staple formed by connecting a large number of staples as a rigid rod having a U-shaped cross section by means of a blade-shaped driver that can reciprocate. This hermetic tie machine has a pair of parallel fixed driver guides extending in the horizontal direction for guiding the reciprocating movement of the driver and the movement of the staple, and a clincher of a plastic bag on the upper and lower surfaces of these fixed driver guides. Each of the plastic bag guide plates is provided with a plastic bag focusing guide groove for guiding to the position. The mouth of the plastic bag is almost focused in the plastic bag focusing guide groove and then focused by the rotary driver guide. Then, the mouth of the focused plastic bag is finally focused by the driver. At the same time, the staples are applied, clinched by a driver and a clincher, and tightly bound. The plastic bag focusing guide groove is formed to have a narrow width so that the operator's finger cannot enter it.

On the other hand, as one binding mode, solid contents (for example, marine products such as raw oysters and mozuku, and wild vegetables such as bracken) are suspended in a liquid (for example, water), and the entire plastic bag is formed. A so-called rocket package is known, which is held in a substantially cylindrical shape and protects solid contents from being damaged by an external impact or the like by a liquid and elasticity of a plastic bag.

<Problems to be solved by the invention> When rocket packaging is performed by the conventional technique, the mouth of the plastic bag filled with the contents is almost completely focused in the narrow plastic bag focusing guide groove of the plastic bag guide plate. The sealing worker
Before inserting the mouth of the plastic bag into the plastic bag focusing guide groove,
The mouth of the plastic bag must be twisted and the content filling portion of the plastic bag must be stretched to suit the rocket packaging. This imposes a troublesome task on the sealing operator when performing a sealing and binding operation for a large amount of plastic bags.

The object of the present invention is that the work of twisting the mouth of a plastic bag filled with contents is not necessary, and the poly bag is automatically connected with the operation of one member (particularly, the movable driver guide) of the sealing and binding machine. It is an object of the present invention to provide a sealing and binding machine that applies tension to a squeezed plastic bag in the vicinity of the converged mouth portion of the bag.

<Means for Solving the Problems> The present invention is directed to a clincher having a clincher groove for guiding opposite legs of staples so as to be wound around a converged mouth portion of a bag-like object, and a clincher. A driver guide unit having a driver for pushing the staples and two opposed guide grooves for guiding the driver and the staples toward the clincher, with the tips of the opposite legs of the staples first and the crown of the staples behind. A driver guide unit in which a portion having one guide groove has a lacking portion that is lacking in the vicinity of the clincher, and a movable driver guide that is movable between a position that fills the lacking portion and a position that retracts from the lacking portion, The mouth of the bag-shaped object is placed above and below the driver guide unit and the clincher and partially overlaps with the above-mentioned lacking portion, and the mouth of the bag-like object is proposed at the clincher position. In the upper and lower bag-like object mouth-portion focusing guide plates having the inner focusing guide grooves, the focusing guide grooves of the lower bag-like object mouth-portion focusing guide plate are It is composed of a movable driver guide with respect to the focusing guide groove and an upper and lower bag-shaped object mouth portion focusing guide plate which are formed widely in the moving direction of the driver.

<Function> The upper and lower bag-like objects are sealed and bound by the operator.The mouth is inserted into the focusing guide groove of the bag focusing guide plate. The adjacent parts are
Within the wider focusing guide groove of the lower bag-shaped object mouth focusing guide plate, the wider amount of the focusing guide groove of the lower bag-shaped object mouth focusing guide plate expands. In this state, the bag-like object is stretched to almost the same extent as in the case of the conventional hermetic binding machine. Therefore, after that, the movable driver guide moves so as to close and the driver moves forward, so that the volume of the bag-shaped material that bulges into the focusing guide groove of the lower bag-shaped material mouth focusing guide plate is reduced. Since the bag is about to be pushed into the same filling capacity as the conventional one, even if the bag-shaped material is stretched by elasticity, the bag-shaped material is stretched more than before.

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 is a vertical cross-sectional view of the hermetically bound machine. FIG. 2 is a side longitudinal sectional view of the hermetically bound machine. FIG. 3 is a vertical cross-sectional view of the staple feeding device. FIG. 4 is a vertical sectional view of the staple detecting device. Figure 5 shows
It is a plane explanatory view showing the important section of one example of the present invention. FIG. 6 is a sectional explanatory view showing a main part of one embodiment of the present invention. The hermetic binding machine 1 includes a driver advance / retract drive unit 6, a blade, and a blade on a base plate 5 extending horizontally in a stand 3 vertically arranged on a support base (not shown) via a bracket 4 having an L-shaped cross section. The fixed main rod 8, the staple feeding mechanism 8a, the driver guide unit 9, the trimming unit 10, the trigger unit 11, the clincher 12, and the clincher holder 13 which are parallel to the driver 7 in the order from the rear end of the base plate 5 toward the front end thereof. It is arranged.

The driver advance / retract drive unit 6 includes a double-acting main cylinder 14 into which compressed air is introduced from both front and rear, a main piston 15 slidably mounted in the main cylinder 14 and reciprocated by compressed air, and a main piston 15. It has an integral piston rod 16 and a main cylinder control valve unit 17 that controls the reciprocating movement of the main piston 15.

The piston rod 16 is coaxially and integrally coupled to the driver 7 via a block-shaped driver holder 18 provided at the tip portion thereof.

The driver 7 is provided with a driver guide unit 9 by a piston rod 16 along the longitudinal axis of the base plate 5.
It is driven so as to reciprocate in the staple guide groove 9 formed in the.

The fixed main rod 8 is located above the driver 7 and is disposed near the front end of the bracket 20 having a triangular side surface and the base plate 5 and a staple supply mechanism 8a.
It is fixed to the base plate 5 via the fixed support base 21 and extends parallel to the front-rear axis of the base plate 5. A driver holder 18 is attached to the fixed main rod 8, and the driver holder 18 is attached to the base plate 5
Guide the robot so that it reciprocates exactly on the front-rear axis.

As shown in detail in FIGS. 3 and 4, the staple feeding mechanism 8a mainly includes a linear staple magazine rail 22 arranged vertically on the fixed support base 21 with respect to the base plate 5, and Parallel to the staple magazine rail 22 and at a certain distance behind the staple magazine rail 22 (corresponding to the thickness of the staple crown portion)
And a staple feed guide plate 23 erected on the fixed support table 21, and in parallel with the staple feed guide plate 23, and
Behind the staple feed guide plate 23, a fixed support base
21 Two staple feed claw guide rods erected on the top 24
And an upper block for fixing the staple magazine rail 22, the staple feed guide plate 23, and the staple feed pawl guide lot 24 in the correct positional relationship near the upper ends thereof.
25, a string-shaped connecting staple guide roller 25a protrudingly provided on the upper block 25, and a block 26 slidably attached to the staple feed claw guide rod 24 in the vertical direction.
, Two staple feeding pawls 27a and 27b rotatably attached to the front surface of the block 26, a staple detecting device 2 provided through the block 26 in the front-back direction of the block 26, and a fixed support base. Fixed to the bottom surface of the upper block 25 and the single-acting staple feed cylinder 29 that moves the block 26 upward by vertically reciprocally moving the piston (not shown) and piston rod 28. And a lower check claw 31 that projects toward the front side and is rotatable, and a lower check claw 31 that is close to the fixed support base 21 and that is fixed to the one staple feed claw guide rod 24 on the upper side thereof. . Between the block 26 and the upper block 25, a block descending spring 32 composed of a compression coil spring is fitted on the staple feeding claw guide rod 24. Block descending spring
32 is the block 26 pushed up by the piston rod 28
To lower.

The lower end of the staple magazine rail 22 reaches the position of the upper surface of the driver guide unit 9, and the staple feed guide plate 23 reaches the position of the upper surface of the upper cover 5a that covers the upper surface of the base plate 5. Therefore, the staples located at the leading ends (that is, the lower ends) of the connecting staples 33 are reliably guided to almost the bottom of the guide groove of the driver guide unit 9.

The staple feeding pawls 27a and 27b each have a bird's-head shape when viewed from the front, and the torsion coil spring 34 causes the shaft to move.
It is biased clockwise and counterclockwise around 35.

Since the leg portion of the staple has a regular triangular cross section having one apex on the outer surface of the leg portion, a third portion is provided between the leg portions of two adjacent staples of the connecting staple 33. As shown in the figure, a triangular gap is created. The tips of the staple feeding pawls 27a and 27b are inserted into this gap by the force of the torsion coil spring 34 and are locked to the upper leg portion of the staple. When the block 26 descends, it comes into contact with the leg portion of the staple on the lower side and pushes the connecting staple 33 downward. As a result, the staple feeding claws 27a and 27b are
The staple is positively fed to the staple guide groove of the driver guide unit 9.

On the other hand, after sending a certain number of staples, block
When 26 rises, the staple feeding pawls 27a and 27b are slightly rotated against the force of the torsion coil spring 34, and the upper surfaces of the leading end portions of the staple feeding pawls 27a and 27b become the staple leg portions of the connecting staple 33. Sliding contact.

The upper check claw 30 is biased by a torsion coil spring (not shown) so as to rotate counterclockwise in FIG.
Due to its shape, the upper check claw 30 freely allows the upper check claw 30 to move downward relative to the upper check claw 30 as well as the feed claws 27a and 27b, while preventing the upper check claw 30 from rising relatively.

The lower check claw 31 is formed by a leaf spring fixed to the staple feeding claw guide rod 24, and is a check projection with a triangular cross section inserted between two adjacent staples of the connecting staple 33. 31a. Due to the shape of the lower check claw 31, the lower check claw 31 is allowed to freely descend relative to the lower check claw 31, while it is prevented from rising relative to the lower check claw 31.

As shown in FIG. 3, when the series of string-like interlocking staples 33 sent in advance are used up, as shown in FIG.
Since the feed claws 27a and 27b are engaged with one of the end positions of the connecting staple 33, ten or more staples remain even when the block 26 descends to the lower limit position. In this state, the next series of string-connected staples 33 are replenished, and when the staple at the leading end position is located below the upper limit position of the block 26, the block 26 returns to the upper limit position, and the trailing connected staples are returned. The staple at the tip end position of 33 contacts the staple at the end position of the preceding interlocking staple 33. In this positional relationship, the lower check claw 31 is such that the staple at the terminal position of the preceding interlocking staple 33 is the lower check claw 31.
The backward movement (that is, the upward movement) of the preceding interlocking staple 33 is surely prevented until it comes off. On the other hand, the upper check claw 33 is
The backward connecting staples 33 are reliably prevented from going backward (that is, rising) by engaging with staples at or near the leading end position of the backward connecting staples 33. By the action of the upper and lower check claws 30 and 31, two separated staples are continuously supplied to the driver guide unit 9 without waste.

The staple detecting device 2 has a sensor cylinder 37 that is inserted into the block 26 by penetrating the block 26 in the longitudinal axis direction.
And the sensor stem 38 inserted in the sensor cylinder 37
And a sensor stem return spring 39 that biases the sensor stem 38 forward. As shown in FIG. 3, the level of the central axis of the tip portion 38a of the sensor stem 38 is substantially the same as the level of the tip portions of the feed pawls 27a and 27b. Therefore, when there is no staple with which the feed claws 27a and 27b engage, there is no staple with which the tip portion 38a of the sensor stem 38 also engages, and the sensor stem 38 has its tip portion 38a.
It is moved forward until a comes into contact with the back surface of the staple magazine rail 22.

On the other hand, the sensor cylinder 37 has two air ports 40.
And 41 are provided, one air port 40 is connected to the air source, and the other air port 41 is connected to the air sequence circuit. The sensor stem 38 is a sensor cylinder.
Inside the 37, it operates so as to connect and disconnect the air ports 40 and 41. That is, in the state shown in FIG. 3, the air port 41 communicates with the air port 40, the air from the air source is supplied to the air sequence circuit via the air port 40 and the air port 41, and the sealed binding machine can operate. It is said that Sensor stem 38 is staple magazine rail
When it moves forward until it comes into contact with the back surface of 22, the air port 41 and the air port 40 are cut off, and the air supply from the air source to the air sequence circuit is stopped, so that the entire air sequence circuit is released. Then, the operation of the sealing and binding machine is stopped. As a result, the blank ejection of staples is completely prevented.

The driver guide unit 9 is a staple supply mechanism.
A first driver guide 42 linearly extending from the position of the support base 21 of 8a toward the clincher 12, and a first driver guide 42 extending in parallel with the first driver guide 42 with a gap narrower than the width of the driver 7. It is composed of a second driver guide 43 that ends approximately at an intermediate position of 42, and a third driver guide 44 that pivots so as to be freely inserted into the notch 43a between the clincher 12 and the tip of the second driver guide 43. As shown in FIG. 3, staple guide grooves 42a and 43b are formed in the inner edge portions of the first and second driver guides 42 and 43, which are opposed to each other. The upper wall portion 42b of the staple guide groove 42a projects more inward than the lower wall portion 42c of the staple guide groove 42a. On the other hand, the lower wall portion 43c of the staple guide groove 43a projects more inward than the upper wall portion 43b of the staple guide groove 43a. The staple guide groove 44a of the third driver guide 44 also has the same shape as the staple guide groove 43a of the second driver guide 43. Therefore, the upper and lower plastic bag receiving grooves 45 and 46 formed on the upper and lower sides of the staple guide grooves 42a and 43a are as shown in FIG. 4 with respect to the central axis of the staple magazine rail 22. And are offset to the right and left respectively.
As a result, the converged mouth portion of the plastic bag is slightly inclined with respect to the staple crown portion arranged in the staple guide grooves 42a and 43a, and is substantially perpendicular to the clinch groove that guides the staple legs of the clincher. Will improve the sealing and cohesion of the plastic bag with staples.

The third driver guide 43 is substantially L-shaped and is rotated by a driver guide drive cylinder 48 about a shaft 47 fixed to the base plate 5. The third driver guide 43 also has a function of focusing the mouth portion of the plastic bag by rotating clockwise in FIG.

As shown in detail in FIG. 6, the base plate 5 is disposed above the driver guide unit 9 and comes into contact with the upper surface of the base plate 5 to guide the upper bag-shaped object mouth portion focusing guide plate 5a (= upper cover). ) Has been placed. Further, below the driver guide unit 9, a lower bag-shaped object mouth converging guide plate 5b is arranged. As shown by the phantom lines in FIGS. 1 and 5, the upper bag-shaped object-portion focusing guide plate 5a is orthogonal to the front-rear axis of the driver 7 and lacks the second driver guide 43. It has a substantially rectangular focusing guide groove 5c overlapping with 43a. This focusing guide groove 5c
Extend to a position facing the clinch groove 12a of the clincher 12. Further, as shown by the solid lines in FIGS. 1 and 5, the lower bag-shaped object mouth focusing guide plate 5b has a focusing guide groove 5d that bulges rearward with respect to the focusing guide groove 5c. Have. The focusing guide groove 5d has a length and a width with respect to the moving direction of the driver 7 and the third driver guide 44, respectively. Therefore, when the poly bag filled with the contents is inserted into the focusing guide grooves 5c and 5d by the sealing operator, the poly bag is stretched to the same extent as in the case of the conventional sealing and binding machine, A portion (a portion filled with contents) near the bottom of the mouth of the plastic bag focused by the focusing guide grooves 5c and 5d bulges toward the guide groove 5d. Thereafter, the third driver guide 44 is rotated so as to close the lacking portion 43a, and the driver 7 advances toward the clincher 12 to squeeze the bulged portion of the plastic bag, and the plastic bag is made larger than before. Be stretched.

On the lower surface of the lower bag-shaped object mouth focusing guide plate 5b, a rectangular shutter 5f that is rotated about an axis 5e and is biased by a spring 5g is provided, and the closing ends of the focusing guide grooves 5c and 5d are provided. Is closed. This is to prevent the sealing operator from accidentally inserting his / her finger into the wider focusing guide groove 5d and being damaged by the cutter 49.

As shown in FIG. 1, the trimming unit 10 includes a blade-shaped cutter 49 that horizontally reciprocates above the clincher 12 and the vicinity thereof, and a cutter drive cylinder.
50 and a cutter valve switch 51 for operating the cutter driving cylinder 50. Cutter valve switch 51
When the forward moving driver holder 18 comes into contact with the roller 52 arranged at the tip of the cutter valve switch
51 turns ON. The trimming unit 10 is for trimming the end portion of the plastic bag protruding above the clinched staple by advancing the cutter 49 after the plastic bag is tightly bound by the staples.

The trigger unit 11 has a trigger lever 54 protruding downward from a plastic bag insertion groove 53 extending in the horizontal axis direction from the sealing operator side toward the clincher 12 in the base plate 5, and the trigger lever 54 rotates. It is composed of a trigger valve 55 operated by the above. The trigger lever 54 is rotated by the operator inserting the mouth portion of the plastic bag filled with the contents to the back of the plastic bag insertion groove 53 to operate the trigger valve 55. As a result, the third driver guide 44 is rotated in the closing direction, and then the main cylinder 14 is operated to move the driver 7 forward. The driver 7 separates one staple at the lowermost position of the interlinked staples 33 from the interlinked staples 33, applies it to the mouth of the plastic bag, and cooperates with the clincher 12 to clinching the mouth of the poly bag. Driver holder 18
Activates the cutter valve switch 51, and the cutter 49 moves forward to trim the upper end of the plastic bag.

<Effect of the Invention> According to the present invention, since the focusing guide groove of the lower bag-shaped object mouth focusing guide plate is formed wider than the focusing guide groove of the upper bag-shaped object mouth focusing guide plate, the liquid content Of the bag-shaped object filled with the object, the portion close to the lower side of the converged mouth portion of the bag-shaped object where the staples are clinched can be squeezed to a greater extent than before by the movable driver guide together with the liquid content, The sealing operator does not need to improve the tension of the bag-like object filled with the contents by twisting the mouth of the bag-like object before the bundling process of the sealing and binding machine.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a hermetic binding machine according to an embodiment of the present invention. FIG. 2 is a side longitudinal sectional view of the hermetically bound machine. FIG. 3 is a vertical cross-sectional view of the staple feeding device. FIG. 4 is a vertical sectional view of the staple detecting device.
FIG. 5 is an explanatory plan view showing a main part of an embodiment of the present invention. FIG. 6 is a sectional explanatory view showing a main part of one embodiment of the present invention. 1 ... Sealing and binding machine, 5a ... Upper bag-shaped object mouth focusing guide plate, 5b ... Lower bag-shaped object mouth focusing guide plate, 5c and 5d ...
... Focusing guide groove, 7 ... Driver, 9 ... Driver guide unit, 12 ... Clincher, 33 ... Connected staple, 44 ... Third driver guide, 43a ... Missing part.

Claims (1)

[Scope of utility model registration request] 1. A clincher having a clinching groove for guiding opposite legs of a staple so as to be wound around a converged mouth portion of a bag, a driver for pushing the staple toward the clincher, and a staple for the staple. A driver guide unit having two opposing guide grooves for guiding the driver and the staple toward the clincher, with the tips of the opposing legs first and the staple crown behind, and a portion having one guide groove A driver guide unit having a missing portion near the clincher and having a movable driver guide movable between a position for filling the lacking portion and a position for retracting from the lacking portion, and a driver guide unit and a clincher above and below the clincher. Forming a focusing guide groove that is placed and partially overlaps the above-mentioned lacking part and guides the mouth part of the bag-like object to the position of the clincher In the upper and lower bag-shaped object mouth focusing guide plates, the focusing guide groove of the lower bag-shaped object mouth focusing guide plate is movable with respect to the focusing guide groove of the upper bag-shaped object mouth focusing guide plate. A hermetically bound machine comprising a driver guide and an upper and lower bag-shaped object mouth converging guide plate which are formed widely in the moving direction of the driver.