JPS6149173B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention stores fruits and other stored items in a bag such as a net bag or a plastic bag, and binds the bag with staples with the bag opening converged. The present invention relates to a hermetic tying machine useful for tying necks.

For example, if multiple spherical fruits such as tangerines or apples are stored in long mesh bags, and the openings at the ends of the bags are gathered together and tied by wrapping linear staples, the necks of the bags are tied. On the other hand, if the legs of the staples are not sufficiently wrapped, a stable binding state cannot be obtained.

Then, the staple is made by bending a metal wire into a U-shape or U-shape beforehand, pressing it against the curved groove of the clincher with a screwdriver, bending it into an annular shape, and wrapping it around the neck near the opening of the bag. Therefore, if the object to be bound is not positioned accurately between the clincher and the tip of the driver, which is the binding part, the leg of the staple may not be wrapped around the neck and end up stuck in the neck. In some cases, only a portion of the neck was tied, leaving the bag half-open. This also applies when the bag opening is not sufficiently converged and the staples are not converged to a diameter smaller than the leg-to-leg dimension of the staple.

In addition, as in the example above, since the bag is tied with items already stored in it, the overall weight is large, unlike the case of a single bag, and the neck of the bag must be firmly supported. There was a fear that it would not be possible to tie them correctly.

The present invention has been proposed in view of these circumstances.

That is, an object of the present invention is to make it possible to securely and accurately tie the mouth of a bag-like body by a simple operation.

In particular, the present invention allows the operator to insert and position the object to be bound into the binding section while firmly grasping the object with both hands, and furthermore, when the worker pushes down the object from the gripping state, the trigger lever is used to secure the object into the binding part in a predetermined manner. The object of this invention is to enable secure and easy bundling by positioning the wires in a certain position and activating a series of bundling steps such as driver operation without requiring any additional operations.

That is, the present invention includes a trigger lever whose middle part is rotatably supported by a support shaft, has a notched recess for converging objects at one end, and has a trigger switch pressing operation section at the other end, and this lever. a trigger switch that operates a forward movement circuit of a drive mechanism by rotational operation; a drive mechanism that first moves the driver and staple guide forward together; and then further moves the driver forward after the staple guide reaches the forward end; and the driver a double-acting switch that operates a double-acting circuit of the drive mechanism by the forward movement of the driver; a staple magazine that supplies U-shaped staples one by one to one side of the binding part; Under normal conditions, the trigger lever is energized by a return spring to open the notched recess so that objects to be bound can be inserted and removed, and the trigger lever is energized by a return spring to open the notch so that objects to be bound can be inserted and removed. When the driver is rotated, the notched recess is aligned with the binding portion between the tip of the driver and the clincher, and at this time, the trigger switch is turned on by the lever.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a longitudinal sectional side view of a main part of a pneumatic sealing binding machine according to the present invention.

This pneumatic sealing binding machine 1 includes a base 2, a body frame 3 formed perpendicularly to the base 2, and a body frame 3 that is supported on the frame 3 at an inclination angle of about 45 degrees so as to be able to reciprocate. a plate-shaped driver 4 and a staple guide 5, and a first driver that serves as a driver drive mechanism that reciprocates the driver 4.
a second piston/cylinder mechanism 7 serving as a staple guide drive mechanism for reciprocating the staple guide 5;
A trigger lever 8 serving as a starting switch operating section for each of these piston/cylinder mechanisms 6 and 7, a clincher 9 that receives the staple S pressed by the forward movement of the driver 4, and a magazine 201 that holds the staple. It is the main component.

The first piston-cylinder mechanism 6 includes a cylinder 60 fitted in a cylindrical housing 10 integrally formed with the body frame 3, and an annular cylinder 60 that is slidably and tightly fitted into the cylinder 60. It consists of a main piston 61 and a hollow piston rod 62 protruding from the center of the lower surface of the piston 61. In the piston rod 62, a slide block 120 constituting a driver reciprocating operating section, which will be described later, is attached to the tip end 62a of the piston rod 62, which projects outward from the lower end surface 10A of the housing 10, with a screw 11. The driver 4 is attached to the slide block 120 with screws 12.

Note that the tip 4a side of the driver 4 is connected to a driver guide 1 screwed to the body frame 3.
The reciprocating motion is guided by 3.

On the other hand, the staple guide 5 that holds and carries one staple S to the binding position is attached by a screw 14 to the lower end 70a of a push rod 70 which is slidably inserted into the piston rod 62. The push rod 70 is operated forward by the forward movement of the sub-piston 71 of the second piston-cylinder mechanism 7. 2nd above
The piston/cylinder mechanism 7 is disposed coaxially with the first piston/cylinder mechanism 6, and the sub-piston 71 is located above the main piston 61 within the cylinder 60 of the first piston/cylinder mechanism 6. It is tightly fitted to the side so that it can slide freely.

A hollow rod insertion cylinder portion 71A that fits into the inner diameter portion 61A of the main piston 61 projects from the center of the lower surface of the sub-piston 71. A pressing member 72 made of a rubber member for pressing the push rod 70 is provided at the innermost part of the rod insertion tube 71A.
In the state before the driver 4 is activated, the pressing member 72 and the push rod 70 are connected to each other.
A space A is maintained between the upper end portion 70b and the upper end portion 70b. This space A is for delaying the starting of the staple guide 5 with respect to the starting of the driver 4 when the driver 4 and the staple guide 5 move forward. That is,
The staple guide 5 includes each of the pistons 6
1 and 71 move forward, and the driver 4 separates one staple S at the leading edge of the connected staples (not shown) from the connected state, pushes this staple S into the staple guide 5, and then moves forward. It is configured. In addition, the above staple S
is placed and held on a staple holding piece 15 provided on one side of the staple guide 5 on the tip end 5 a side, that is, on the side facing the driver guide 13 .

On the other hand, the trigger lever 8, which serves as a starting switch operation part for each of the piston/cylinder mechanisms 6, 7, is composed of a pair of beak-shaped plate-like bodies 80, 80, and is located at the lower front end of the body frame 3 (see Fig. 1). The driver 4 and the staple guide 5 are placed between the proximal end portions 80 of the plate-like bodies 80, 80 so as to be rotatable.
a, 80a are supported at the center of the body frame 3 by support pins 16. At the tip portions 80b, 80b of each of the plate-like bodies 80, 80, a converging notch recess 81 for converging the vicinity of the opening of the bag-like object (not shown) to form a neck N and positioning and guiding it to a predetermined bundling position. 81 is formed diagonally upward. The open end sides of these recesses 81, 81 are widened with upper edges 81A, 81A shown in the figure being inclined, so that the neck N of the bag-like part, which is the object to be bound, can be easily inserted and removed. However, the innermost parts 81B, 81B of these recesses 81, 81,
At the time of insertion, the neck portion N can be inserted sufficiently between the legs of the staple S, and the staple S is inserted into the neck portion N.
It is narrow enough to be able to be straddled around, and narrow enough to prevent the operator's fingers from accidentally entering it.

Further, the trigger lever 8 has a central annular portion 160a engaged with the pin 16, and
One end 160b is locked to the lever 8, and the other end 160b
0c is resiliently biased counterclockwise around the pin 16 by a return spring 160 that is locked to the outer casing of the cylinder block 19. When the trigger lever 8 is not operated, the spring 1
60 to the state shown in FIG. 1 (the range of movement of the trigger lever 8 in the counterclockwise direction is restricted by a stopper (not shown) so that it can move to the state shown in FIG. The valve operating piece 82 of the lever 8 faces the operating end 22C of the valve 20 at a distance. Further, the recesses 81, 81 on the one end side are formed on the lower edge 81.
C is opened so as to be substantially flush with an upper guide edge 17a of a clincher holder block 17, which will be described later.

Therefore, in the non-operating state shown in FIG. At this time, when the operator supports the neck part N by gripping it at two places on both sides of the trigger lever 8 and inserts it into the recessed parts 81, 81, the neck part N is focused along the recessed parts 81, 81. When the neck part N is held and pressed further downward, the trigger lever 8 is rotated clockwise around the support pin 16 against the spring 160, and eventually the operating piece 82 is moved to the valve 20. It hits the operation end 22C of the valve 20 and switches the valve 20.
Turn on. At this time, the lower edge 81C of the recesses 81, 81 is connected to the guide surface 13 of the driver guide 13.
It will be located along a.

That is, when the neck part N of the bag-like object is inserted into each of the notch recesses 81, 81 and pressed downward, each of the plate-like objects 80, 8
0, that is, the trigger lever 8 is connected to the support pin 16.
The neck N of the bag-like object is rotated clockwise in FIG.
It is located on the entry line of the tip portion 4a.

At the binding position, the clincher 9 is arranged to receive the tip of the leg of the staple S and bend the staple S so as to wrap it around the neck N of the bag-like object. The above clincher 9 is
A clincher holder block 17 is erected at the front end of the base 2 so that the bending groove 90 formed on the upper surface is located on the entry line of the driver 4.
It is stored inside and can be accessed freely. The lower surface 9A of the clincher 9 is received by a clincher protrusion adjustment member 91 disposed within the block 17. The lower surface 9A of the clincher 9 is formed into a tapered shape,
By reciprocating the clincher protrusion amount adjustment member 91 that abuts and engages with the lower surface 9A in the direction of arrow Y in FIG. By moving up and down in the direction of arrow X in the figure, the amount of protrusion of the stapler 9 can be finely adjusted depending on the length of the leg of the staple or the thickness of the neck of the bag.

Next, details of the binding metal magazine 201 will be explained with reference to FIGS. 9 and 10. This binding metal magazine 201 has connecting staples 219
A vertical feed guide section 221 that feeds and guides the staples S located at the tip of the driver one by one toward the driver tip 4a, and a stacking feed guide that feeds the connected staples 219 one by one in the horizontal direction into the vertical feed guide section 221. and a plate portion 222 (see FIG. 9).

A staple receiver 223 having a rectangular cross section is provided within the vertical feed guide portion 221 and extends perpendicularly to the axial direction of the driver 4 and protrudes in the lateral direction of the body frame 3 .

The height of the staple receiver 223 (referring to the length of the staple receiver 223 in the axial direction of the driver 4) is formed so that it is always higher than the leg length of the various staples S to be used. Crown part 2 of staple S
The staple receiver 223 supports the connected staple 219 so that the staples 09b are in sliding contact with each other.

A pusher 224 having the same U-shaped cross section as the staple S is attached to the staple receiver 223 so as to be movable in the longitudinal direction of the staple receiver 223. The inner surface of the pusher 224 is in sliding contact with the upper surface and both side surfaces of the staple receiver 223, and the length of the pusher 224 is
24 advances to the frontmost end of the stable receiver 223, the rear end of the upper surface portion 224b of the pusher 224 is on the rear side (9th
In the figure, the right end side of the lateral feed guide plate section 222)
It is set so as not to exceed the position of the rear side guide 231 which is installed upright.

A manual operation piece 225 is provided at the lower end of one leg 224a of the pusher 224. After the connected staples 219 in the vertical feed guide part 221 are completely consumed, the manual operation piece 225 moves the connected staples 219a loaded in the horizontal feed guide plate part 222 into the vertical feed guide part 221 under its own weight. Staple receiver 22 for twisting and dropping
This is used when pulling the pusher 224 backwards. Rear part 2 of manual operation piece 225
One end 226a of a pusher spring 226 is locked to 25a. The pusher spring 226 is a tension coil spring, and the other end 226b is connected to the staple receiver 2 at the rear end of the binding metal magazine 201.
23 is engaged with a hook 228 of a support piece 227.

A spring receiving roller 22 is provided at a portion of the lateral feed guide plate portion 222 near the body frame 3.
9 is rotatably supported by a fixed shaft 230. The pusher spring 226 is wound around this spring receiving roller 229 as shown in FIG.

The horizontal feed guide plate portion 222 of the magazine 201 for binding metal fittings is attached to the body frame 3 parallel to the axis of the driver 4, and extends from the upper end 222a of the horizontal feed guide plate portion 222 to the lower end 222.
It slopes downward at an angle of approximately 45° toward b. Therefore, the lateral feed guide plate portion 22
2 (in FIG. 9, the left end side of the lateral feed guide plate section 222).
A plurality of connected staples 219a stacked in several rows between 2 and the rear guide 231 and loaded with their crowns facing upward are pushed into the vertical feed guide 221 by their own weight. It is constantly urged to fall. However, the leg portion 219b of the connecting staple 219a located at the lower end 222b of the lateral feed guide plate portion 222 is connected to the pusher 2 over the entire length of the connecting staple 219a.
24 and maintains its posture. Therefore, after consuming the connected staples 219 in the vertical feed guide section 221, by pulling the pusher 224 backward, the connected staples 219a
The connected staple 219a can be suspended and supported by the connected staple receiver 223 in a state in which the connected staple 219a falls smoothly into the vertical feed guide portion 221 and the crown portion of the connected staple 219a is in contact with the upper surface of the staple receiver 223.

The above-mentioned front side guide 232 and rear side guide 231
A transparent magazine cover 233 is slidably inserted between the two. Magazine cover 233
The lower end of the staple receiver 223 is received by a support plate 234 fixed to the lower surface of the staple receiver 223 .

In the magazine 201, the spring receiving roller 2
29 and the fixed shaft 230, the fixed shaft 230
A circular flange is provided at the tip of the spring receiving roller 229, and an opening with a diameter larger than the flange is formed in the center of the spring receiving roller 229. After the fixed shaft is inserted into the opening of the spring receiving roller 229, the spring force of the pusher spring 226 is utilized. and fixed shaft 230 to spring bearing roller 229.
This may be done by making the spring eccentric with respect to the center of rotation of the spring 226 and utilizing the resilient biasing force of the pusher spring 226 and the flange being hooked to the spring receiving roller 229.

On the other hand, in the central part of the body frame 3,
Each piston/cylinder mechanism 6 receives an ON activation signal by pressing the trigger lever 8,
A piston forward movement valve 20 serving as a first trigger device for forward movement of the piston cylinder mechanism 6, 7 is provided, and an ON operation signal is obtained by pressing a switching lever 110, which will be described later, to control each piston/cylinder mechanism 6, 7.
The piston backward movement valve 30, which serves as a second trigger device for backward movement operation, is the piston forward movement valve 2.
It is arranged adjacent to 0.

As shown in FIG. 2, the piston reciprocating valve 20 includes a piston reciprocating valve cylinder 21 that is tightly fitted and positioned in a first valve insertion hole 19A formed in the cylinder block 19, and A valve stem 22 for reciprocating the piston is slidably inserted therein. and,
The cylinder 21 has a first cylinder portion 21A.
and the front side (second
The second cylinder part 21 is tightly fitted to the right side in the figure.
B, and a third cylinder portion 21C that is tightly fitted in front of the second cylinder portion 21B. Further, the valve stem 22 is a main stem 2 fitted into the first cylinder portion 21A.
2A, an operating stem 22B inserted into the second cylinder portion 21B, and this operating stem 22B.
The operating end portion 22C is formed at the distal end of the cylinder and is fitted into the third cylinder portion 21C. Note that the operating end portion 22C is always placed in a state of protruding outward from the cylinder block 19.

The main stem 22A has a first, a second, and a third main stem.
and fourth piston portions 22a ₁ , 22a ₂ , 22a ₃ ,
22a ₄ , and within the first cylinder portion 21A is a first annular valve chamber 21a ₁ partitioned by the first piston portion 22a ₁ and the second piston portion 22a ₂ ; A second annular valve chamber 21a 2 partitioned by the second piston part 22a ₂ and _the third piston part 22a ₃ , the third piston part 22a ₃ and the fourth piston part 22a ₄ The third annular valve chamber _21a3 is partitioned by a third annular valve chamber 21a3.

Then, the side surface 19 of the cylinder block 19
The compressed air supplied to the air plug 23 attached to C is supplied into the annular valve chamber 25 for forward movement of the main stem formed at the rear end of the cylinder 21 through the air supply passage 24 for forward movement of the main stem. The compressed air in this valve chamber 25 is supplied to the _rear end surface (second
(left end face in the figure).

Further, the compressed air supplied to the air plug 23 is supplied to the first piston driving air supply passage 26A.
The compressed air in this valve chamber 21a _{2 is supplied to the second annular valve chamber 21a 2 through} the first piston return movement air supply passage 26B, and constitutes a piston return movement valve 30, which will be described later. 1st
The compressed air in the valve chamber 31a ₁ is supplied to the first piston through the _second piston return air supply passage 26C. - Supplied to the main piston lower chamber 60A of the cylinder mechanism 6. The main piston 61 of the first piston/cylinder mechanism 6 is operated to return (return) by the compressed air supplied into the main piston lower chamber 60A. This main piston 6
1 return, the sub-piston 71 of the second piston-cylinder mechanism 7 is returned together with the main piston 61 in a state of abutting engagement with the upper surface 61B of the main piston 61.

Further, the compressed air supplied to the air plug 23 is supplied into the second cylinder section 21B through the operating stem return air supply passage 27, and the compressed air inside the second cylinder section 21B is supplied to the second cylinder section 21B. It acts on the rear end surface (left end surface in FIG. 2) of the operating stem 22B. Further, the compressed air in the second cylinder section 21B passes through the gap B formed between the second cylinder section 21B and the operation stem 22B, and then flows to the third cylinder section 21B.
The compressed air in the cylinder part 21C passes through the small hole 28 formed in the cylinder part 21C and flows into the fourth annular valve chamber 21c formed on the outer periphery of the cylinder part 21C. Further, the compressed air in the valve chamber 21c passes through the main stem reciprocating air supply passage 29, and is then supplied to the stem lower chamber _21a4 in the first cylinder portion 21A.
is supplied to. The compressed air supplied into this stem lower chamber _21a4 is transferred to the main stem 22.
This compressed air is applied to the front end surface of the main stem 22A, and furthermore, this compressed air is supplied into the center hole _22a5 formed in the axial direction of the main stem 22A. In addition,
A compression coil spring 200 is disposed within the center hole _22a5 to assist in returning the main stem 22A.

On the other hand, the piston return-action valve 30 is slidably inserted into the piston return-action valve cylinder 31 which is tightly fitted and positioned in the second valve insertion hole 19B formed in the cylinder block 19. It consists of a valve stem 32 for piston reciprocating that is fitted into the piston. The cylinder 31 includes a first cylinder portion 31A and a first cylinder portion 31A.
The front side of the cylinder part 31A (right side in Fig. 2)
The second cylinder part 31B is tightly fitted into the second cylinder part 31B. Further, the valve stem 32 is connected to a main stem 3 that is inserted into the first cylinder portion 31A.
2A, an operating stem 32B that protrudes from the front end surface of the main stem 32A and is fitted into the second cylinder portion 31B, and an operating stem 32B that is formed at the tip of the operating stem 32B and that is constantly connected to the outside from the cylinder block 19. and an operating end portion 32C that is placed in a state of protruding. A valve cylinder cap 300 is fitted to the rear end of the first cylinder portion 31A to tightly fit inside the cylinder portion 31A.

The main stem portion 32A includes first, second, third and fourth piston portions 32a ₁ , 32a ₂ , 32
a ₃ and 32a ₄ , and the first cylinder portion 31A
Inside, there is a first annular valve chamber 31a 1 partitioned by the first piston part 32a ₁ and the second piston part 32a _{2 ,} and the second piston part 32a ₂ .
a second annular valve chamber 31a 2 partitioned by the third piston part 32a ₃ ; and a third valve chamber 31a ₂ partitioned by the third piston part 32a ₃ and the fourth piston part 32a ₄ . It has an annular valve chamber _31a3 .

Inside the second annular valve chamber _31a2 , when the piston forward movement valve 21 is turned on, the second annular valve chamber 2 of the piston forward movement valve 20 is provided.
1a ₂ is supplied through the second piston driving air supply passage 40A, and the compressed air within the valve chamber 31a ₂ is supplied through the first piston forward movement air supply passage 40B and the main piston 61. A check valve 50 for removing back pressure generated when the piston moves backward, and a second air supply passage 4 for forward movement of the piston.
After passing through 0C, the first piston/cylinder mechanism 6
The sub-piston upper chamber 60 in the cylinder 60 of
Supplied within B. Further, a first piston back pressure air discharge passage 54A is provided between the check valve 50 and the cylinder 60, and the back pressure air discharge passage 54A is connected to the sub piston 71 and the main piston 61. When returning, the residual air in the main piston upper chamber 60C in the cylinder 60 is discharged from the first main piston back pressure air discharge passage 5.
4A and the check valve 50 mentioned above, it is discharged into the atmosphere. The check valve 50 includes a communication valve chamber 51 for communicating the first piston forward air supply passage 40B and the second piston forward movement air supply passage 40C, a valve cylinder 52, and a valve cylinder 52. It consists of a valve piston 53 that is slidably and tightly fitted into the valve cylinder 52, and when compressed air is supplied to the communication valve chamber 51, the valve piston 53 is configured to maintain the back pressure of the first main piston. When the air discharge passage 54A and the second main piston back pressure air discharge passage 54B are closed and the supply of compressed air to the communication valve chamber 51 is cut off, the passages 54A and 54B are closed. Open.

Further, in the piston return valve 30, a small diameter portion 32b is formed in the center portion of the operating stem 32B, and between this small diameter portion 32b and the second cylinder portion 31B, the valve 30 has a small diameter portion 32b. An annular valve chamber 31b ₁ for connecting stem holding air is formed to supply compressed air for self-holding the entire valve stem 32 into the stem lower chamber 31a ₄ of the first cylinder portion 31A during ON operation. There is. In this valve chamber 31b ₁ , when the piston reciprocating valve 20 is turned on, the air supply passage 100 for stem self-holding is placed in communication with the second piston driving air supply passage 40A. Compressed air is supplied from the second annular valve chamber 21a ₂ of the piston reciprocating valve 20. Then, when the piston reciprocating valve 30 is turned on with compressed air stored in the stem self-retaining air connection annular valve chamber 31b ₁ , the compressed air in the valve chamber 31b ₁ is transferred to the operating stem 32B. and the second cylinder portion 31B.
The valve stem 32 is supplied into the lower stem chamber _31a4 through the gap C formed between the valve stem 32 and the valve stem 32 in a self-retaining state. That is, the ON operating state of the piston return valve 30 can be maintained. The self-holding state of the valve stem 32 is determined by the piston forward movement valve 20.
With the OFF operation, the compressed air in the second piston driving air supply passage 40A passes through the third annular valve chamber _21a3 of the piston forwarding valve 20, and further passes through the first exhaust air passage 101 to the outside. It is released by being ejected to

On the other hand, the ON operation of the piston return valve 30 is performed by pushing the piston return switching lever 110 rotatably supported by the support pin 16 which rotatably supports the trigger lever 8. It can be done.

As shown in FIG. 3, the switching lever 110 has the support pin 16 therebetween, a valve operating piece 110A bent at one end, and a slide attached to the driver member 4 at the other end. Slide block receiving piece 11 that receives block 120
0B is formed by bending. As shown in FIG. 4, the switching lever 110 is activated when the driver 4 moves forward and the neck N of the bag-like object is bound with the staple S, that is, when the main piston 61 is lowered. When the dead point is reached, the slide block receiving piece 110B is pushed in by the tip 120a of the slide block 120 and rotated clockwise in FIG. 4.
In this way, as the switching lever 110 rotates, the valve operating piece 110A presses the operating end 32C that constitutes the valve stem 32 of the piston return valve 30, and the piston return valve 30 Turn ON.

Next, the pneumatic sealing machine 1 having the above configuration will be described.
One cycle of binding will be explained.

1, 2, and 3 are diagrams showing the state before operation, and show the second piston driving air supply passage 40A and the first and second piston forward movement air supply passages 40B, 40C. The supply of compressed air into the main piston lower chamber 60A is in a closed state, and the first piston driving air supply passage 26A and the first and second piston reciprocating air supply passages are provided in the main piston lower chamber 60A. Compressed air is supplied through 26B and 26C, and the sub-piston 71 is received by the piston bumper member 130, and the main piston 61 is received by the sub-piston 71, and each of these pistons 6
1 and 71 are held at top dead center.

Then, as shown in FIG. 1, the neck N of the bag-like article is inserted into the notch recesses 81, 81 of the trigger lever 8, and the trigger lever 8 is moved to the fourth position so as to bring the neck N to the binding position. When pressed and rotated as shown in FIG. is pushed into the third cylinder portion 21C.

As the operating end 22C is pushed in in this manner, the rear end side of the operating stem 22B enters into the second cylinder portion 21B, and the gap B is closed. Then, a gap D is formed between the third cylinder part 21C and the operating end part 22C, and the compressed air stored in the third cylinder part 21C is discharged into the atmosphere through the gap C. be done. At this time, the compressed air in the stem lower chamber 21a ₄ placed in communication via the main stem reciprocating air supply passage 29 is also discharged to the atmosphere, and the main stem 22A is connected to the first piston portion 22a ₁ It moves forward by the air pressure of compressed air acting on the rear end face of the cylinder.

Then, the piston forward movement valve 20 is provided in the second piston driving air supply passage 40A.
Compressed air is supplied through the second annular valve chamber 21a ₂ of the passage 40A, and the compressed air in this passage 40A is supplied to the second annular valve chamber 31 of the piston reciprocating valve 30.
a ₂ , first piston forward movement air supply passage 40B,
The air is supplied into the sub-piston upper chamber 60B via the check valve 50 and the second piston forward movement air supply passage 40C. In addition, the above-mentioned piston forward movement valve 2
0 is turned on, the second piston return air supply passage 26C and the first piston return movement air supply passage 26B are connected to the first annular valve chamber 21a ₁ and the second piston return movement valve 20. The main piston lower chamber 60A communicates with the atmosphere through an exhaust air passage 102, and the compressed air in the main piston lower chamber 60A is discharged into the atmosphere.

In this way, when compressed air is supplied into the sub-piston upper chamber 60B, the sub-piston 71
moves forward while dragging the main piston 61. At this time, the driver 4 moves forward before the staple guide 5, and the driver movement path 14
The leading edge staple S of the connected staples that has already entered the 0 is separated from the other staples by the forward movement of the driver 4, and the staple S is separated from the staple holding piece 15 of the staple guide 5.
It is pushed upwards and held in place. Note that at this time, the staple guide 5 is connected to the driver 4.
The guide 5 attempts to move forward due to the contact friction force accompanying the forward movement of the guide 5, but the guide 5 has screws 151 and 15 attached to the upper guide member 170 that guides the movement of the guide 5.
1, and is pressed by a leaf spring 152 attached by 1 to prevent forward movement. A hemispherical dowel 153 is formed on the staple guide engaging surface of the leaf spring 152, and the staple guide 5 is pressed through the dowel 153. Further, the elastic force of the leaf spring 152 is set to be smaller than the moving force when the staple guide 5 is operated forward by the forward movement of the sub-piston 71, and the elastic force of the leaf spring 152 is set to be smaller than the moving force when the staple guide 5 is operated forward by the forward movement of the sub-piston 71. It does not present any obstacles when transporting the vehicle.

The rear end portion 70 of the push rod 70
b is the rod insertion hole 71A of the sub-piston 71
When the staple guide 5 hits the pressing member 72 fitted therein, the staple guide 5 moves forward together with the driver 4, holding and carrying the staples S to the binding position.

Then, as the forward movement of the driver 4 and the staple guide 5 progresses, as shown in FIG. 6, when the tip 5a of the staple guide 5 comes into contact with the upper end surface 17A of the clincher holder block 17, The compressed air in the sub-piston upper chamber 60B is supplied to the first piston-cylinder mechanism 6.
The air is supplied into the main piston upper chamber 60C through a main piston forward movement air supply passage 150 formed in the middle of the main piston.

Then, the sub-piston 71 is stopped at that position by the compressed air in the sub-piston upper chamber 60B and the compressed air in the main-piston upper chamber 60C, and only the main piston 61 moves independently. move. Due to this forward movement of the main piston 61, the staple guide 5
The staple S held on the staple holding piece 15 is pushed into the bending groove 90 of the clincher 9, and the neck N of the bag is tied as shown in FIG. 7 to seal the bag. .

In this way, when the driver 4 reaches the end of forward movement and ties the neck N of the bag-like article, the slide block 120 presses the slide block receiving piece 110B of the switching lever 110, thereby forming the piston return movement valve 30. Push the operating end 32C of the valve stem 32 into the second cylinder part 31B, and turn on the piston return valve 30.
Operate.

In the piston return valve 30, when the operating end 32C is pushed in, the compressed air in the second piston driving air supply passage 40A is transferred to the stem self-holding air supply passage 100 and the stem self-holding air connection. annular valve chamber 31b ₁
The entire valve stem 32 is held in _a forward movement state.

Then, the compressed air in the sub-piston upper chamber 60B is transferred to the second piston forward movement air supply passage 40C, the check valve 50, the first piston forward movement air supply passage 40B, and the third annular valve chamber. 31a ₃ and the third exhaust air passage 103 to the atmosphere. At this time, the main piston lower chamber 60A includes the first piston driving air supply passage 26A and the piston forward movement valve 2.
0 second annular valve chamber 21a ₂ of the piston drive air supply passage 40A, the second annular valve chamber 31a ₂ of the piston return movement valve 30, and the second piston return movement air supply passage 26C. Compressed air is supplied through the At this time, the compressed air in the main piston upper chamber 60C is also discharged into the atmosphere through the main piston forward movement air passage 150 and the sub-piston upper chamber 60B.

Then, as shown in FIG. 8, the main piston 61 returns toward the top dead center, dragging the sub-piston 71 with the compressed air supplied into the main piston lower chamber 60A. At this time,
The residual air in the main piston upper chamber 60C is removed from the first main piston back pressure air discharge passage 54.
A. Since the air is discharged into the atmosphere through the valve cylinder 52 of the check valve 50 and the second main piston back pressure air discharge passage 54B, there is no possibility of a return failure of the main piston 61. The main piston 61 reliably returns to the top dead center and is set again to the state before operation.

The notch recess 8 of the trigger lever 8
When the push-in operation of the trigger lever 8 is released in order to take out the bag-like article with the neck portion N tied together from inside 1, 81, the lever 8 springs the torsion coil spring 160 fitted to the support pin 16. Depending on the force, it returns to the position before activation. With the return of the trigger lever 8, the operation end 22C of the valve stem 22 constituting the piston forward movement valve 20, which had been pressed and operated by the valve operation piece 82 of the trigger lever 8, is moved as shown in FIG. The valve 20 returns to its pre-operation position as shown in , and the valve 20 for forward movement of the valve piston is turned OFF. This valve 20
By the OFF operation, the compressed air in the stem lower chamber 31a ₄ of the piston return valve 30 is transferred to the stem self-holding air connection annular valve chamber 31b ₁ , the stem self-holding air supply passage 100 , and the second stem self-holding air supply passage 100 . piston driving air supply passage 40A, and the third annular valve chamber 2 of the piston reciprocating valve 20.
1a ₃ and the first exhaust air passage 101, the self-holding state of the valve stem 32 is released, the valve stem 32 returns to its pre-operation position, and the piston return valve 30
operates OFF.

In this way, one cycle of the pneumatic seal binding machine 1 is completed.

According to the embodiment having the above configuration, the forward end of the staple guide 5 is set earlier than the forward end of the first piston/cylinder mechanism 6 that operates the driver 4 forward. The second
The forward movement can be performed only by the piston-cylinder mechanism 7. Therefore, there is no need for a transmission mechanism such as a clutch device as in conventional ones.
The structure becomes simpler. Further, since a clutch device or the like which is subject to severe wear as in the conventional method is not used, durability is improved, and the end of forward movement of the staple guide 5 is always uniform. Therefore, this binding machine 1
The air sequence also operates constantly to ensure a stable binding condition. Further, the sub-piston 71 of the second piston-cylinder mechanism 7 is tightly fitted into the cylinder 60 of the first piston-cylinder mechanism 6 coaxially with the main piston 61 of the first piston-cylinder mechanism 6. This not only simplifies the configuration but also reduces the number of parts. Moreover, the shape of the binding machine 1 as a whole becomes simple.

Further, according to the embodiment having the above configuration, each of the pistons 61 and 71 reaches the bottom dead center, and the neck N of the bag-like object is bound by the staple S, and at the same time the slide block 120 and the By coupling with the switching lever 110, each of these pistons 61, 71 automatically returns to the position before actuation, making the bundling work simple and easy.

Further, according to the embodiment having the above configuration, one cycle of the binding machine 1 is completed by simply engaging the neck N of the bag-like object with the trigger lever 8 and pushing the trigger lever 8. It is possible to speed up the binding work.

As described above, in the present invention, by fitting and inserting the neck of the bag-like object to be bound into the notch recess of the trigger lever, the neck can be accurately bundled, and moreover, the bag can be bundled in this state. When the trigger lever is pressed down so as to press the bundle downward, the driver is driven to drive the staple and clinch the neck.

Therefore, the operator can accurately clinch the predetermined binding position simply by grasping the two points of the object to be bound with both hands and inserting the object into the notch recess and pressing the object, thereby releasing the pressing force. Since the trigger lever is returned and the opening is opened, the object to be bound can be easily taken out.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view of the apparatus of the present invention.
FIG. 2 is an enlarged vertical sectional view, partially cut away, illustrating the state of the drive mechanism before operation. FIG. 3 is a partially cutaway side view illustrating the state of the trigger switch and return switch before they are activated. FIG. 4 is an enlarged vertical sectional view, partially cut away, for explaining the operating state of the drive mechanism. FIG. 5 is a partially cutaway side view illustrating the operating state of the trigger switch and return switch. FIG. 6 is a partially cutaway longitudinal side view showing a state in which the drive mechanism is in the middle of operation. FIG. 7 is a partially cutaway longitudinal side view showing a state in which the drive mechanism has been bundled. FIG. 8 is a partially cutaway longitudinal side view showing a state in which the drive mechanism has completed its return movement. FIG. 9 is a partially cross-sectional plan view of the device of the present invention. FIG. 10 is a side view of the lower end of the magazine. 1...Pneumatic sealing machine, 2...Base, 3...
...Body frame, 4...Driver, 5...Staple guide, 6...First piston/cylinder mechanism, 7...Second piston/cylinder mechanism, 8
...Trigger lever, 9...Clincher, 81...
Notch recess, 201...Magazine.

Claims (1)

[Claims] 1 The middle part is rotatably supported by a support shaft, and one end has a notched recess for converging objects to be bound,
A trigger lever has a trigger switch pressing operation part at the other end, a trigger switch that operates the forward movement circuit of the drive mechanism by rotating this lever, and the driver and staple guide are first moved forward together, and the staple guide is also moved forward. A drive mechanism that further moves the driver forward after reaching the end, a double-movement switch that activates a back-movement circuit of the drive mechanism by the forward motion of the driver, and one U-shaped staple to be supplied to one side of the binding part. and a clincher disposed at the other end of the binding part so as to face the driver, and the trigger lever is formed with an opening for accommodating the binding part of the object to be bound. has a limited width to position the binding portion between the legs of the staple during operation, and is open in the direction of staple movement to prevent shearing of the bundle by the clinching action of the staple. An inclined guide portion is continuously formed at the open end of the outer groove portion and the outer groove portion so that the objects to be bound can be focused into the groove portion, and the trigger lever is normally energized by a return spring. The cutout recess is opened so that the object to be bound can be inserted and removed, and the cutout recess is rotated against the return spring so that the cutout recess is aligned with the binding portion between the tip of the driver and the clincher. At the same time, the trigger switch is turned on by the lever.
A sealing machine for tying bag openings, etc.