JPH1059317A - Method and apparatus for pressing top of binding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly, easily and reliably set a pressing position of a pressing means to improve operativity in pressing a top of a laminated bundle by detecting pressing force by the pressing means for objects to be bound and stopping a support cylinder when the pressing force reaches a predetermined value. SOLUTION: When objects to be bound 12 are pressed by lowering a pressing roller 14 by extending a support cylinder 48, a pressing cylinder 16 contracts. An amount of the contraction is detected by a signal change of a lead switch 16, and when the amount reaches a predetermined value which has been set in advance, the support cylinder 48 is stopped to set a height of a base of the pressing cylinder 16 while a position the set pressing roller 14 is made to be a pressing position against the objects 12. Then a stopper 34 is lowered, the objects 12 are fed toward a binding position while being pressed with a feed cylinder 42 extending, and the objects 12 are held between a conveying means 22 and a belt conveyer 54 of a top pressing conveyer 52 for carrying them out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binding position in which a straightened object to be bound by a predetermined aligning device is pressed from above by a pressing means, and while the pressed state is maintained, binding with a string is performed. The present invention relates to an upper holding method and an upper holding device for a binding machine to be transferred.

[0002]

2. Description of the Related Art For example, a binding machine that binds a stacked binding object formed by stacking cardboard case sheets, thin cases, and the like folded in a sheet shape in multiple stages by tying a string stretched along a conveying direction, It is known as part of an automatic transport line.

[0003] Such a binding machine is, for example, a loading / unloading means for transporting a layer of a material to be bound, and a cord wrapped around the material to be bound along a transport direction, and the material to be bound is tied by the tying the string. And binding means for binding.

[0004] In this type of binding machine, an aligning device such as a horizontal aligning device for aligning the side ends and the like of the objects to be stacked is disposed on the carry-in side with respect to the binding position. Then, an upper pressing device that presses the stacked objects to be bound, such as side edges, from above, and that can be transported in the binding position direction without breaking the objects to be bound by feeding in the pressed state, Generally provided on machines.

[0005] The upper holding device is provided with, for example, pressing means capable of moving up and down and capable of feeding in the unloading direction, and pressing the pressing means at the pressing position of the pressing means set as the descending position.
In addition, the object to be tied can be transferred in the direction of the tying position by feeding from the pressing position by the feeding operation of the holding means.

[0006]

The upper holding device of the known binding machine is generally capable of moving up and down under the operation of rotating an operation handle or controlling the driving of a motor by a switch. The position in the vertical direction, that is, the height, is set according to the height of the object. Then, by raising and lowering the pressing means within a predetermined range at a predetermined height of the upper pressing device, pressing of the object to be bound by the pressing means and waiting of the pressing means until loading of the next object to be bound are possible. It has become.

Here, the height of such an upper holding device, that is, the pressing position of the holding means against the material to be bound is usually
It is only determined by the eye size of the worker. Since the scale depends largely on the intuition of the worker, the variation cannot be avoided.

For example, if the height of the upper holding device is set lower than an ideal position with respect to the upper surface position of the object to be tied, the pressing force from the pressing means excessively acts on the upper surface of the object to be tied. Under such circumstances, the upper surface of the binding object may be damaged. On the other hand, if the height of the upper holding device is set higher than the ideal position, the pressing force from the pressing means is too small, and the pressing of the binding object becomes insufficient. At the time of the original transfer, there is a possibility that the objects to be bound may collapse.

That is, the workability and the reliability of the work are inevitably reduced under the variation of the pressing force of the pressing means against the object to be bound.

When the height of the upper presser device is set based on the scale, usually, the height is temporarily set once, and then the objects to be tied are temporarily flown on the line to be operated under the operation of the tying machine. Therefore, it is necessary to determine whether or not the set position is appropriate, so that the working efficiency is significantly reduced.

According to the present invention, the pressing position of the pressing means can be quickly set.
It is an object of the present invention to provide an upper holding method and an upper holding device for a binding machine which can be easily set.

[0012]

In order to achieve this object, according to the upper holding method of the binding machine of the present invention, the holding means is moved between a lowered position and a standby position above the lowered position by its expansion and contraction. The base of the presser cylinder to be raised and lowered is supported so that it can be raised and lowered under the expansion and contraction of the support cylinder.
When the holding cylinder is entirely lowered under the extension of the support cylinder, the pressing force of the holding means on the object to be bound at the lowered position is monitored. Then, when detecting the pressing of the object to be tied under a predetermined pressing force set in advance,
The support cylinder is stopped and the height of the base of the holding cylinder is set, and the lowered position of the holding means at the height of the base is set as the pressing position for the object to be bound.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1 and FIG. 2, in the upper holding device 10 of the binding machine according to the present invention, the objects 12 to be bound are stacked.
Pressing means 14 for pressing from above is supported by a press cylinder 16 so as to be able to move up and down, and is disposed at a predetermined location of the binding machine 18.

As can be seen from FIG. 2, the binding machine 18
The loading means 20 and the unloading means 22 for transporting the binding object 12 in a certain direction, and the binding means 24 for binding the binding object transported to the binding position in blocks by tying the strings and binding the strings. For example, it is arranged as a part of an automatic conveyance line formed by a roller conveyor 26 or the like formed of a combination of a driving type, a driven type, and the like.

In such a binding machine 18, a stacked binding object 12 such as a cardboard case sheet or a thin case folded in a sheet shape is stacked on a predetermined number of stages in advance by a roller conveyor (automatic conveyance). The sheet is conveyed by a line 26, and is transferred onto a table at a binding position defined by a stopper 28, for example, via a transfer to a carrying-in means 20 serving as a driven roller conveyor. Then, the string is laid along the transport direction under the rotation of the arm 30 of the binding means 24, and the string is formed by a knot forming mechanism (not shown) arranged on the lower surface of the table as a part of the binding means. The formation of knots allows the objects to be tied in a stack
The binding machine 18 binds the bundles 12 in blocks, and after the binding, the binding device 18 is conveyed in the unloading direction by unloading means 22 which is, for example, a drive type belt conveyor.
Is composed.

The basic configuration of the binding machine 18 is as follows:
JP-A-003681, column 2, lines 13 to 29 and FIGS. 1, 2 and JP-A 08-040409, column 4, line 36 to column 5, line 16 and FIG. Since a well-known configuration can be used as it is as well as a binding unit that forms a knot by tying a string around an object to be bound, a detailed description thereof is omitted here.

As shown in FIGS. 2 and 3, in this type of tying machine 18, for example, by aligning the side edges under pressure from the side, the tied objects 12 of the stack are straightened. An alignment means such as a horizontal alignment device 32 is disposed on the carry-in side with respect to the binding position, and the object to be bound in a straightened state can be pressed from above by the holding means 14, so that the upper holding device 10 of the present invention is It is arranged. In the binding machine 18 having such a configuration, for example, the upper holding position is defined by the stopper 34 that can project upward from the carrying-in means 20,
By the operation of the horizontal alignment device 32 at the upper holding position, it is possible to neatly align the side edges of the objects to be bound.

The horizontal aligning device 32 is formed, for example, by fixing a pressing piece 36 to a movable shaft of a cylinder 38 which can be expanded and contracted in the horizontal direction, and presses the material to be bound at the upper pressing position synchronously from left and right sides. To the extent possible, they are arranged on the left and right sides in the transport direction of the binding object 12, respectively. However, such a configuration of the horizontal alignment device 32 is known, and the structure itself is not the purpose of the present invention, and thus will not be described in detail here.

The stopper 34 is supported by a cylinder 40 so as to be able to move up and down, and the position of the stopper 34 projecting from the upper surface of the loading means which can be engaged with the object 12 transported by the loading means 20 is set as its initial position. (See FIG. 2).

Here, as can be seen from FIGS. 1 and 2, the holding means 14 is, for example, an extendable feed cylinder.
It is supported so as to be movable in the unloading direction (right side in the drawing) by being sent out under the extension of 42. As shown in FIGS. 1 to 3, in the upper holding device 10 of the present invention, the entire feed cylinder including the holding means 14 can be expanded and contracted by connecting the base of the feed cylinder 42 via the bracket 44. While being supported by the cylinder 16 so as to be able to move up and down, by connecting the base of the holding cylinder via the base member 46, the entire holding cylinder including the holding means and the feed cylinder is supported by the extendable and supportable cylinder 48 so as to be able to move up and down. I have.

The base of the support cylinder 48 is, for example, an arch-shaped support base provided between the left and right sides of the binding machine 18.
Fixed to 50. The entire press cylinder 16 including the press means 14 and the feed cylinder 42 is supported by the support cylinder 48 so as to be able to move up and down with respect to the support table 50.

The holding cylinder 16, the feed cylinder 42, and the support cylinder 48 need only have a structure in which the movable shaft can be extended and contracted with respect to the base. For example, a general air cylinder or hydraulic cylinder is used as each cylinder. it can. The drive units corresponding to the respective cylinders are connected to controllers (not shown) of the binding machine 18 having a CPU and the like so that the expansion and contraction of the presser cylinder 16, the feed cylinder 42 and the support cylinder 48 can be automatically controlled. .

In such a binding machine 18, an upper press conveyor 52 is disposed at a position adjacent to the press roller 14 on the unloading side. The upper presser conveyor 52
For example, a drive type belt conveyor 54 that can be driven in synchronization with the unloading unit 22 at the same speed is provided, and the tied object 12 sent out in the binding position direction under the operation of the feed cylinder 42 is combined with the unloading unit 22. It is configured to be able to be conveyed in the carry-out direction under the holding.

The upper holding conveyor 52 is slidably provided on a support rod 56 erected on the base member 46, for example.
Locking piece 56a at the upper end of support rod and base 52 of upper holding conveyor
The elastic member 58, such as a tension coil spring, is elastically supported in the vertical direction.

Further, as the holding means 14, for example, a holding roller having a one-way clutch mechanism that ensures rotation in only one direction can be used. The rotation direction of the pressing roller (pressing means) 14 is, for example, a direction in which the conveyance of the material 12 to be bound by the upper pressing conveyor 52 can be ensured in a pressing state from above, that is, the counterclockwise direction in FIGS. Is set to

The presser cylinder 16 supports the presser roller 14 so as to be able to move up and down under the expansion and contraction thereof, and the position of the presser roller set by the extension thereof serves as a pressing position for pressing the material 12 to be bound from above. The position of the pressing roller set by the contraction is set as a standby position at which the position of the pressing roller is separated from the object to be bound.

Here, in the upper holding device 10 of the present invention, the pressing position of the object 12 to be bound by the pressing roller 14 is changed to the supporting cylinder 48 accompanying the arrival of the object to be bound to the upper holding position defined by the stopper 34. Cylinder under tension
It is configured to automatically set by 16 overall descents.

The arrival of the binding object 12 at the upper holding position is detected by position detecting means (not shown). As such a position detecting means, for example, a photoelectric sensor or the like that detects the existence itself of the binding object 12 at the corresponding location by detecting an optical signal, or a corresponding location by detecting pressure acting on the stopper 34 in the unloading direction. For example, a pressure sensor or the like that detects the arrival of an object to be bound to the object can be used.

For example, as shown in FIG.
The tied object 12 carried by the abutment comes into contact with the stopper 34,
When the position detecting means determines that the material to be tied to the upper holding position is reached, first, the side edges of the material to be tied are aligned and straightened under the operation of the horizontal aligning device 32. As shown in FIG. 4, when the presser cylinder 16 is extended,
Drops by a specific amount, for example, about 100 mm. And
After setting the lowering position of the press roller 14, as shown in FIG.
The overall lowering of the presser cylinder 16 under the extension of the support cylinder 48 causes the presser roller 14 to be further lowered.

Here, the upper holding device 10 of the present invention is configured so that the pressing force detecting means 60 can detect the pressing force from the pressing roller against the material 12 to be bound as the pressing roller 14 descends. And, in the present invention, for example,
An equal-pressure cylinder having a reed switch capable of elastically contracting at the time of extension and having a reed switch for detecting the elastic contraction to a predetermined elastic contraction amount by either ON or OFF is provided as a presser cylinder 16, and the like. The reed switch of the pressure cylinder (pressing cylinder) is used as the pressing force detecting means 60.

It is to be noted that such a constant pressure cylinder is a general commercially available product, and its structure itself is not the purpose of the present invention, so that detailed description thereof will be omitted.

The reed switch (pressing force detecting means) 60 is connected to, for example, a controller or the like of the binding machine 18 and monitors the change in the signal from the reed switch by the controller or the like, whereby the elastic contraction of the presser cylinder 16 is performed. It is possible to detect the amount, and eventually, the elastic contraction amount of the presser cylinder to the predetermined amount.

Pressing roller under extension of support cylinder 48
When the object 14 to be bound is pressed by the pressing roller as shown in FIG. 5, the pressing cylinder (constant pressure cylinder) 16 is elastically contracted under the pressing force. Then, when it is detected by the change in the signal of the reed switch 60 that the elastic contraction amount of the presser cylinder 16 reaches a predetermined amount, the support cylinder 48 is stopped and the height of the base of the presser cylinder is set. At the same time, the upper pressing device 18 is configured so that the position of the pressing roller 14 set thereby is set as a pressing position for the object 12 to be bound.

Next, as shown in FIG. 6, after the stopper 34 is lowered, the object 12 to be tied is pressed in the binding position direction by the feeding operation of the pressing roller 14 with the feed cylinder 42 extended. The object to be bound is transported to the binding position defined by the stopper 28 by transporting the object to be bound between the carrying-out means 22 and the belt conveyor 54 of the upper holding conveyor 52 while holding the object to be bound. (See FIG. 2). Then, the objects to be bound 12 are bound at the binding position, and are carried out under the drive of the carrying-out means 22 after the stopper 28 is lowered.

The pressing roller 14 is provided with an upper pressing conveyor 52.
Is rotatable only in the direction in which the conveyance of the tied object 12 can be ensured, so that the pressing roller does not roll with respect to the tied object under the feeding operation of the pressing roller in the feed direction. The object to be bound is reliably sent out in the transport direction under the frictional force generated between the pressing roller and the object to be bound and the synchronized driving of the carrying-in means 20.

After being sent out by the press roller 14,
At the time of transporting the tied object 12 by the holding between the upper holding conveyor 52 and the carrying-out means 22, since the rolling of the pressing roller in the same direction is ensured, the rolling of the pressing roller causes the pressing roller to move from the pressing roller. Smooth transfer to the upper presser conveyor becomes possible.

In the binding machine 18, the feed cylinder
After the feeding of the material 12 to be tied under the extension of 42, the pressing roller 14 is returned to the initial position shown in FIG. 5 under the contraction of the feed cylinder, and as shown in FIG. 16
The pressing roller is moved and set to a standby position above the pressing position under the contraction of, and waits for the next object to be tied to reach the upper pressing position.

When the next object to be bound reaches the upper holding position, the holding roller 14 is extended under the extension of the holding cylinder 16.
Is lowered by a specific amount, and the subsequent operations are repeated in the same manner as described above.

As described above, in the upper press method of the binding machine of the present invention, the entire press cylinder 16 including the press roller 14 is supported by the support cylinder 48 so as to be able to move up and down.
When the press roller presses the object to be bound 12 with a predetermined pressing force, the support cylinder is stopped and the height of the base of the press cylinder 16 is set, and the position of the press roller set at the height of the base is set. It is the pressing position against the binding object.

That is, since the setting of the pressing position of the press roller 14 can be automatically performed under the expansion and contraction of the support cylinder 48, a troublesome manual setting operation at the start of the operation can be omitted. Therefore, work is simplified and workability is improved.

Then, the pressing force of the pressing roller 14 against the object 12 to be bound is detected by the amount of elastic contraction of the pressing cylinder 16, and the signal from the reed switch 60 changes when the amount of elastic contraction of the pressing cylinder reaches the predetermined amount. When this occurs, that is, when the pressing force of the pressing roller against the object to be tied becomes a predetermined pressing force, the support cylinder 48 is stopped, so that the pressing force on the object to be tied can be made constant. That is, since a pressing force suitable for the object to be tied 12 can always be ensured, damage to the object to be tied due to excessive pressing can be reliably prevented.

Further, by monitoring and detecting the pressing force of the object to be bound 12 by the pressing roller 14, pressing of the object to be bound by an appropriate pressing force can always be obtained. Can be performed reliably. That is, the material to be tied at the time of transfer under the feed operation of the
Since the collapse of 12 can be reliably prevented, the reliability of the work is improved.

For the same kind of material 12 to be tied,
Pressing roller under operation of the presser cylinder 16 (expansion / retraction operation) without operation of the support cylinder 48 (expansion / retraction operation)
Since the pressing operation on the object to be bound is repeated only by the lifting and lowering of 14, the number of operating steps is reduced except when the pressing position of the pressing roller is set at the start of the work. Accordingly, the overall operation time of the upper holding device 18 can be reduced, and the processing capacity can be sufficiently improved.

And, the upper holding device of the binding machine of the present invention.
According to 10, the above-described upper pressing method can be appropriately performed, and a quick and easy setting operation can be secured by automatically setting the pressing position of the pressing roller 14.

Further, since the pressing force of the pressing roller 14 on the object 12 to be bound is detected by utilizing the elastic contraction of the pressing cylinder 16, an appropriate pressing force on the object to be bound can be obtained without complicating the structure. Obtained easily.

Here, in the embodiment of the present invention, the upper holding conveyor 52 is made of an elastic member 58 such as a tension coil spring.
Elastically supported in the vertical direction. In such a configuration, the upper holding conveyor 52 is resiliently moved up and down under contact with the material to be bound 12 so that the height of the material to be bound can be changed due to an error in the number of layers. It can respond immediately, and the impact at that time is absorbed under elasticity,
Breakage, damage, and the like of the material to be bound during transfer to the upper holding conveyor can be reliably prevented.

The elastic member 58 need only elastically support the upper holding conveyor 52 in the up-down direction, and is not limited to a tension coil spring. Other spring members, for example, a compression coil spring or the like may be used as an elastic member. May be used. In addition, the present invention is not limited to the spring member. For example, a member other than the spring member having an elastically contractible structure, such as a constant pressure cylinder exemplified as the presser cylinder 16, may be used as the elastic member 58 here. .

Further, in this embodiment, the pressing roller 14 having a one-way clutch mechanism is embodied as the pressing means.
However, the present invention is not limited to this. For example, if the presser cylinder 16 can be contracted during transfer to the upper press conveyor, a fixed projection can be used as press means.

However, if the pressing roller 14 having such a one-way clutch mechanism is used as the pressing means, the contracting operation of the pressing cylinder 16 at the time of transfer to the upper pressing conveyor 52 becomes unnecessary. The operation of the press roller by 42 does not become complicated,
The configuration can be simplified.

In this embodiment, an elastic cylinder which is elastically expandable and contractable is exemplified as the presser cylinder 16, and the reed switch of this cylinder is used as a pressing force detecting means.
Although the configuration used as 60 is embodied,
However, the present invention is not limited to this as long as the pressing force from the pressing roller 14 can be detected.For example, the pressing cylinder is a normal air cylinder or the like, and a pressure sensor is provided on the movable shaft of the pressing cylinder to detect the pressing force. It is good also as a structure provided as a means.

However, if a constant-pressure cylinder is used as the presser cylinder 16, the structure is not complicated, and
Since an appropriate pressing force can be detected, the configuration can be easily simplified.

In this embodiment, the feed cylinder 42 and the support cylinder 48 are illustrated as an air cylinder, a hydraulic cylinder, etc. similar to the presser cylinder 16 serving as a constant pressure cylinder. The cylinder 48 is not limited to an air cylinder or a hydraulic cylinder, because elastic contraction is not required and operation control by a controller having a CPU or the like is sufficient. You may use as.

The embodiments of the present invention described above are intended to explain the present invention, and do not limit the present invention in any way. Modifications, alterations, and the like made within the technical scope of the present invention are also possible. It goes without saying that all are included in the present invention.

[0055]

As described above, according to the upper pressing method of the binding machine according to the present invention, the pressing force of the pressing means on the binding object is detected, and the pressing force on the binding object becomes a predetermined pressing force. Since it is sufficient to stop the support cylinder when it reaches, the pressing position of the pressing means can be automatically set.

Since a pressing force suitable for pressing from above and feeding in the feeding direction can be obtained without any troublesome manual operation, the pressing position of the pressing means can be set quickly, easily and reliably. it can.

Therefore, the workability and the reliability of the work of the bundling machine at the time of pressing the stacked objects to be bound are improved.

Further, if the pressing force on the object to be bound is detected based on the amount of elastic contraction of the presser cylinder, a pressing force suitable for pressing the object to be bound can be easily detected without complicating the configuration. Therefore, the configuration can be sufficiently simplified.

Further, after the pressing position of the pressing means is set, if the pressing means is repeatedly moved up and down under the operation of only the pressing cylinder without operating the support cylinder, the number of operation steps at the time of the upper pressing is reduced. Due to the reduction, the overall operating time of the holding-down device is sufficiently increased to increase the throughput.

According to the upper holding device of the binding machine of the present invention, the above upper holding method can be appropriately performed, and quick and easy setting operation can be secured by automatically setting the pressing position of the pressing means. .

Furthermore, if a constant pressure cylinder is used as the holding cylinder and the pressing force of the holding object by the holding means is detected by its elastic contraction, an appropriate pressing force on the object is accompanied by a complicated structure. Can be easily obtained.

Further, if the pressing roller having the one-way clutch mechanism is used as the pressing means, the material to be bound can be smoothly and easily transferred to the upper pressing conveyor without the contraction operation of the pressing cylinder or the like. Can be prevented from becoming complicated, and the configuration can be simplified.

Further, if the upper holding conveyor is elastically supported in the up-down direction, the upper holding conveyor can change the height of the object to be bound by the elastic lifting and lowering in contact with the object to be bound. And the shock at that time is absorbed under elasticity, so that breakage or damage of the material to be bound during transfer to the upper holding conveyor can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an upper holding device of a binding machine according to the present invention in an initial state.

FIG. 2 is a schematic side view of a binding machine.

FIG. 3 is a schematic front view of a top holding device of the binding machine.

FIG. 4 is a schematic side view of the upper pressing device of the binding machine in a lowered position of the pressing means.

FIG. 5 is a schematic side view of the upper holding device of the binding machine when the holding cylinder is entirely lowered.

FIG. 6 is a schematic side view of the upper press device of the binding machine at a feed position of the press means.

FIG. 7 is a schematic side view of the upper pressing device of the binding machine at a standby position of the pressing unit.

[Explanation of symbols]

 10 Upper holding device for binding machine 12 Object to be bound 14 Holding means (holding roller) 16 Holding cylinder (equal pressure cylinder) 18 Binding machine 20 Loading means 22 Unloading means 24 Binding means 34 Stopper 42 Feed cylinder 48 Support cylinder 52 Upper holding conveyor 58 Elastic member 60 Pressing force detecting means (lead switch)

Claims (8)

[Claims] An object to be bound, which is carried in by a carrying-in means and straightened by a predetermined aligning means, is pressed from above by a pressing means, and is delivered to the unloading side by being sent out in a pressed state. In a binding machine that continuously conveys to the binding position by the upper holding conveyor while maintaining the pressed state, and binds with the cord at the binding position, and then unloads the object to be bound by the unloading means, The base of the presser cylinder that moves up and down between the lowering position and the standby position above the lowering position is supported so as to be able to move up and down under the expansion and contraction of the support cylinder, and the presser cylinder is extended under the extension of the support cylinder. At the time of overall lowering, the pressing force on the binding object by the holding means at the lowering position is monitored, and the pressing of the binding object under the predetermined pressing force set in advance is performed. When the support cylinder is stopped, the height of the base of the holding cylinder is set, and the lowering position of the holding means at the height of the base is set as the pressing position for the object to be bound. Presser method. 2. A stacked object to be bound, which is carried in by a carrying means and straightened by a predetermined aligning means, is pressed from above by a pressing means, and is transported to the unloading side by being sent out in a pressed state. In addition, while maintaining the pressing state, the upper holding conveyor continuously conveys to the binding position, and after binding by the string at the binding position, unloads the object to be bound by the unloading means. The presence or absence of the object to be tied to
When the arrival of the material to be tied to the upper holding position is detected, the holding means is lowered by a specific amount under the extension of the extendable holding cylinder, and after the holding cylinder is stopped, the base of the holding cylinder is controlled to extend or retract. With the elongation of the support cylinder that is supported so as to be able to ascend and descend, the entire holding cylinder including the holding means is lowered, and the object to be bound is pressed from above by the holding means. When the pressing force on the object to be tied by the pressing means is monitored, and when the pressing of the object to be tied under a predetermined pressing force set in advance is detected,
The support cylinder is stopped to set the height of the base of the holding cylinder, and the lowered position of the holding means at the height of the base is set as the pressing position for the object to be tied, and the base of the holding cylinder is supported by the holding cylinder at this pressing position. The feeding operation of the holding means under the operation of the stretchable feed cylinder is performed to transfer the material to be bound to a position on the unloading side which can be transported by the upper holding conveyor adjacent to the holding means. Method of holding down the binding machine. 3. The pressing force on the object to be bound by the pressing means at the lowered position at the time of overall lowering of the presser cylinder under the extension of the support cylinder is determined by the amount of elastic contraction at the time of extension of the presser cylinder. 3. The upper pressing method according to claim 1, wherein monitoring is performed, and when the amount of elastic contraction of the presser cylinder reaches a predetermined amount, discrimination is made from a predetermined pressing force on the material to be tied by the presser means. 4. A stacked object to be bundled, which is carried in by carrying-in means and straightened by a predetermined aligning means, is pressed from above by a pressing means, and is sent out in a pressed state to an upper holding conveyor adjacent to the unloading side. In a binding machine having an upper holding device capable of being transported, a base of a holding cylinder that supports the holding means so as to be able to move up and down between a lowered position and a standby position above the lowered position under the expansion and contraction of the holding means is provided as a support cylinder. The lifting force is supported by the expansion and contraction of the support cylinder, and the pressing force against the object to be bound by the pressing means at the lowered position is monitored by the pressing force detecting means when the holding cylinder is entirely lowered under the extension of the support cylinder. When the pressing force detecting means detects the pressing of the binding object under a predetermined pressing force set in advance, the supporting cylinder is stopped and the base of the pressing cylinder is stopped. Holding device on the binding machine that is characterized in that to set the height. 5. A stacked material to be bound, which is carried in by carrying-in means and straightened by predetermined alignment means, is pressed from above by a pressing means, and is sent out in a pressed state to an upper holding conveyor adjacent to the unloading side. A bundling machine provided with an upper holding device capable of being transferred; a feed cylinder for connecting the holding means to the movable shaft and supporting the holding means so as to be able to be sent out in the unloading direction under the expansion and contraction thereof;
A presser cylinder for supporting the entire feed cylinder including the presser means so as to be able to move up and down between a lower position and a standby position above the lower position under expansion and contraction by coupling the base of the feed cylinder to the movable shaft; A support cylinder for supporting the entire holding cylinder including the holding means and the feed cylinder so as to be able to move up and down under the expansion and contraction of the holding cylinder by connecting the base of the holding cylinder; Position detecting means for detecting the arrival; when the entire presser cylinder descends under extension of the support cylinder,
Pressing force detecting means for detecting a pressing force of the pressing means against the object to be bound by the pressing means at the descending position; elongation of the pressing cylinder after reaching the upper pressing position, and of the support cylinder after stopping of the pressing cylinder. Under elongation, the entire holding cylinder including the holding means is lowered to press the object to be bound from above by the holding means, and when the object to be bound is pressed by a predetermined pressing force, the support cylinder is stopped and the holding cylinder is stopped. The binding machine is characterized in that, by setting the height of the base of the holding cylinder and by the feeding operation of the holding means by the feed cylinder at the height of the base of the holding cylinder, the material to be bound is transferred in the direction of the upper holding conveyor. Presser device. 6. The elastic cylinder can be elastically contracted at the time of extension, and the elastic contraction of the presser cylinder to a predetermined elastic contraction amount is turned on or off.
6. A pressure equalizing cylinder having a reed switch configured to detect by any one of F. is provided as at least a holding cylinder, and the reed switch of the constant pressure cylinder is used as pressing force detecting means. Presser device of tying machine. 7. The pressing means is a pressing roller having a one-way clutch mechanism for ensuring rotation in only one direction, and its rotating direction is controlled by the upper pressing conveyor when the pressing roller is pressed from above. The upper press device of a binding machine according to any one of claims 4 to 6, wherein the upper holding device is set in a direction in which conveyance of the bundled material can be ensured. 8. An upper holding conveyor adjacent to the holding means on the carry-out side is elastically supported in a vertical direction with respect to a base member which can be moved up and down integrally with a base of the holding cylinder. The lowering position of the presser means
8. The upper holding device of the binding machine according to claim 4, wherein a contact surface of the holding means is set to a height substantially equal to a contact surface of the upper holding conveyor.