JP2572954Y2 - Opening adjustment device for bag gripping arm of automatic packaging machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a device for adjusting the opening of a bag gripping arm in accordance with the size of a bag to be gripped in an automatic packaging machine.

[0002]

2. Description of the Related Art In recent years, food packaging has been diversifying, and there is a strong tendency that one machine requires filling and packaging for bags of different specifications. For this reason, in the conventional rotary type intermittent drive automatic packaging machine, in order to make the bag gripping arms conform to different bag widths of various standards, the gripping arms of a bag gripping device which is provided around the rotary table in large numbers are used. It is adjusted each time.

FIGS. 3 to 7 show a bag gripping arm versus opening degree adjusting device of the bag gripping device. The distance 1 between the claws 3 and 3 'of the bag gripping arms 2 and 2' is determined by the width of the bag 4. It is changed appropriately according to the dimensions. Specifically, Table 1
Is provided with a circumferential cam 5 whose circumferential end is formed vertically above and at a predetermined height difference. The circumferential cam 5 is provided on a rotary shaft 6 for intermittently driving the table 1 together with the rotary shaft 6. It is fitted so as to allow only vertical sliding and following and returning within one process range without rotating. A fulcrum 1 is provided on a bearing 11 provided on a side surface of a boss 8 erected on the apparatus frame 7.
An inverted L-shaped lever 10 is attached via a lever 2, and the distal end of the lever 10 is engaged with the lower surface of the cam 5, and the proximal end is screwed to a screw shaft 9 a supported by the lower part of the bearing 11. Further, a handle 9 is provided at an end of the screw shaft 9a. When the handle 9 is rotated right or left, the inverted L-shaped lever 10 rotates about the fulcrum 12 via the screw shaft 9a. The entire circumference cam 5 with which the tip of the lever 10 is engaged is moved up and down.

[0004] A shaft bearing 13 having a fixed length is vertically provided from the back surface of the table 1 toward the entire circumference cam 5, and a corner K of an L-shaped lever 14 is provided at the lower end thereof. The lever 14 is horizontally pivoted in the direction, and the lever 14 has a horizontal rod tip 14a.
A free-rotating roller 15 is attached to the vertical rod 1 so as to slide on the circumferential end of the cam 5.
A freely rotating roller 16 is also attached to the upper end of 4b,
A tail m protruding from a rear portion of one of the bag gripping arms 2, 2 '(2 in the illustrated example) disposed opposite to each other is brought into contact with the rear end. At this time, the gripping arms 2, 2 'are rotatably mounted on the back surface of the table 1 by pins 17, 17, and the springs 18 are hooked near their respective center portions. The vertical rod 1 is pulled so as to be sandwiched in the directions (c) and (d), and is trying to expand in the direction of the arrow (e) on the tail m side of the gripping arm 2 for this purpose.
The roller 16 of 4b blocks. The other gripping arm 2 'and the gripping arm 2 are designed to engage with each other at an inner central position. Therefore, the supporting rods 2a, 2a' are located at opposing inner surfaces of the gripping arms 2, 2 '. Are partially overlapped with each other vertically. A slit 19 is formed in the lower supporting rod 2a 'in a predetermined length range, while an engaging pin 20 is attached to the upper supporting rod 2a to form a head. And a lower portion thereof is fitted into and engaged with the slit 19 of the support rod 2a ', whereby the bag gripping arm 2' operates in synchronization.

[0005] Next, a star-shaped cam 21 is provided at the end of the rotating shaft 6 of the table 1 so that the inclined side f can be rotated and adjusted so that the inclined side f can contact the head of the engaging pin 20. The rotation is adjusted by appropriately turning the knob 22 clockwise or counterclockwise. As shown in FIG. 5, the adjusting means rotates the knob 22 clockwise or counterclockwise with respect to the table 1 so that the shaft 23 moves up and down. Built-in bearing 24
Is provided at the upper end of the shaft 23 through a relatively large through-hole 25 formed in the plate surface of the star cam 21, and the lower end of the shaft is provided with a slit 26 in a certain length range of the table 1 slightly apart therefrom. A U-shaped bearing 27 is fixedly mounted on the back surface of the table so that its internal groove g corresponds to the slit 26, and an L-shaped lever 28 is inserted into the internal groove g of the bearing 27.
Is mounted so as to be swingable in the directions of arrows (f) and (g), a slide groove 29 is formed in the horizontal rod end 28a of the lever 28, and a horizontal rod 30 mounted on the lower end of one knob shaft 23 is fitted. The star-shaped cam 21 has a slit 31 of a fixed length at a position perpendicular to the internal groove g.
And a vertical rod 28b of the L-shaped lever 28 is provided with a roller 3 in a sliding relationship with the slit 31.
2 is attached.

Accordingly, when the knob 22 is rotated and the shaft is moved up and down, the L-shaped lever 28 is moved by the arrow (f) with the pin 34 as a fulcrum.
(G), and the engaging rod 33
2, the star-shaped cam 21 is turned around the turning shaft 6 in the directions indicated by the arrows (h) and (i). And engagement pin 20
Is adjusted so that the distance between them is short, and when they are rotated in the (i) direction, they are separated.

As is apparent from the above description, the handle 9
Then, according to various bag widths to be used, bag gripping arms 2, 2 '
Can be adjusted simultaneously for all (8 sets in the figure) provided around the table before the operation, while the knob 22 is used to adjust the distance between the arms 22 'and
Are used individually when the bag mouth is opened by closing the bag mouth, or when the bag mouth is closed by widening the interval l when sealing.

[0008]

As described above, it is necessary to perform the operation of adjusting the distance between the bag gripping arms using the handle every time the width of the bag to be used is changed. As the number increases, the number of times tends to increase. However, in the conventional apparatus, since the handle is installed below the table (on the back side) (see FIG. 7), the operability is poor, and if it is adjusted during driving, there is a safety problem and it is difficult to clean. there were.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, and a feature of the present invention is that a plurality of bag gripping arms paired to grip a bag are provided on a table. At the same time, the cams are arranged at equal intervals so that they can rotate intermittently, and a cam around the entire circumference is arranged below the table. In addition to engaging the projected portion with the lower surface of the full circumference cam, moving the drive rod up and down to swing the lever, the full circumference cam can slide in the vertical direction of the rotation axis of the table, An L-shaped lever is attached to the lower surface of the table at the bag gripping position so that the horizontal rod of the L-shaped lever slides on the cam around the entire circumference with the rotation of the table, while the vertical rod of the L-shaped lever is a spring. One of the bag gripping arms pulled so as to sandwich the opposing gap The tail cam is brought into contact with the above-mentioned traction so as to be prevented, while a star cam having the same horizontal plane on the table upper surface and having inclined sides formed in the peripheral portion is arranged so that the relative positional relationship can be appropriately changed. In addition, the head of the locking pin connected so that the tails of the opposing bag gripping arms can be simultaneously opened and closed is protruded upward so that it can come into contact with the inclined side of the star cam. A bag gripping arm pair opening adjustment device, wherein a lower end of the drive rod in the device frame is connected to one end of an L-shaped lever pivotally supported,
Notch grooves are formed on both sides of the other end of the L-shaped lever, and are engaged with pins protruding on both sides of the screw tube, and the screw tube is screw-fitted with a rotatably supported screw rod, Further, the screw rod is connected to a distal end of a handle provided outside the apparatus frame located below the table, and the drive rod is driven by the handle.

[0010]

A handle for driving the drive rod to move the cam up and down is provided outside the frame located below the table. When the handle is turned left or right, the drive rod is driven and the bag is gripped. The operation of adjusting the interval between the arms can be easily and easily performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
FIGS. 1 and 2 show a main part of a bag gripping arm-to-opening degree adjusting device of the present invention. As shown, the configuration of the present invention is used for adjusting the distance between the bag gripping arms 2 and 2 '. The position of the handle 9 is provided on the lower outside of the frame 44, and the other device configuration is the same as that shown in FIGS. It should be noted that the distance between the gripping arms 2 and 2 'is in the expanding direction and the load of the spring 18 is in the increasing direction.

As shown in FIGS. 1 and 2, an all-round cam 5 is fitted on the rotary shaft 6 of the table 1. One end of the all-round cam 5 is supported by a fulcrum 37 and the other end is driven. A protrusion 36a provided at the center of the lever 36 connected to the rod 43 is engaged. The lower end of the drive rod 43 is connected to one end of an L-shaped lever 38 pivotally supported via a support plate 41 and a fulcrum 42 attached to the device frame 44, and the other end of the L-shaped lever 38 has cutout grooves on both sides. A screw rod 39 is engaged with a pin 45a protruding from both sides of the screw tube 45 and is rotatably supported by the support plate 41. on the other hand,
A handle 9 is provided on a side surface of the device frame 44, and the tip of the handle 9 and the screw bar 39 are connected via a connecting rod 40.

The operation of the handle operating mechanism of the present invention will be described. First, when the handle 9 is rotated right or left, this rotation is transmitted to the threaded rod 39 via the connecting rod 40, and the L-shaped lever 3 is screwed into the threaded rod 39 via the threaded pipe 45.
8 moves in the direction of the arrow, and the lever 38 swings about the fulcrum 42. Therefore, the drive rod 4 connected to the lever 38
3 slides in the vertical direction, whereby the lever 36 swings about the fulcrum 37, and moves the entire circumference cam 5 up and down via the protrusion 36a.

Thus, the distance l between the bag gripping arms 2, 2
When determining according to the bag width to be used (see FIGS. 3 to 6),
First, the handle 9 is rotated to rotate the screw rod 39 rightward or leftward, and the L-shaped lever 38, the driving rod 43, and the lever 3
The cam 5 is moved up and down through the cam 6. Thereby, the tip roller 15 of the horizontal rod 14a of the L-shaped lever 14 is
Slides in the vertical direction of the rotating shaft 6 in a state where the L-shaped lever 1 is positioned on the flat portion v at the circumferential edge of the L-shaped lever 1.
4 swings in the directions of arrows (a) and (b) to change the contact position between the roller 16 of the vertical rod 14b and the tail m of the bag gripping arm 2.

For example, when the lever 36 is swung upward by turning the handle 9, the cam 5 moves up, and the L-shaped lever 14 rotates in the (b) direction. When l becomes large, a bag with a large bag width can be gripped. Conversely, when the handle 9 is rotated in the reverse direction to swing the lever 36 downward, the cam around the entire circumference moves downward and the L-shaped lever 14 moves ( B), the distance 1 between the gripping arms 2 and 2 'is reduced, and a bag with a small bag width can be gripped.
When such a handle operation is performed, the handle 9 is moved to the position shown in FIGS.
As shown in (1), since it is installed on the side of the device frame 44 outside the table 1, it can be safely and easily operated even during machine operation.

[0016]

As described above, the opening adjusting device for a bag gripping arm according to the present invention connects the lower end of the drive rod in the device frame to one end of an L-shaped lever pivotally supported so as to be swingable. Notch grooves are formed on both sides of the other end of the L-shaped lever, and are engaged with pins protruding on both sides of the screw tube, and the screw tube is screw-fitted with a rotatably supported screw rod, Further, the screw rod is connected to the tip of a handle provided outside the apparatus frame located below the table, and the drive rod is driven by the handle. When adjusting the distance between the bag gripping arms by driving the drive rod and moving the cam up and down around the entire circumference, the operation can be performed safely and easily even during machine operation. Load increases when the gripping arm is expanded Also handle the load is alleviated steering that is facilitated. In addition, there is an effect that cleaning of the device becomes easy.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main part of a bag gripping arm-to-opening degree adjusting device of the present invention.

FIG. 2 is a plan view showing a main part of the bag-holding-arm-to-opening-degree adjusting device of the present invention.

FIG. 3 is a view showing a full rest configuration of the automatic packaging machine according to the present invention.

FIG. 4 is a partially cutaway view of the gripping arm mechanism applied to the present invention.

FIG. 5 is a partial detailed view of a knob adjustment unit applied to the present invention;

FIG. 6 is a partial detailed view of a grip lever base applied to the present invention;

FIG. 7 is a view showing a conventional bag gripping arm pair opening degree adjusting device.

[Explanation of symbols]

 Reference Signs List 1 table 2, 2 'gripping arm 4 bag 5 full circumference cam 6 rotating shaft 13 shaft bearing 14 L-shaped lever 15, 16 roller 18 spring 19, 26 slit 20 locking pin 21 star cam 22 knob 25 through hole 27 shaft bearing box 28 L-shaped lever 36 Lever 36a Projecting portion 37 Supporting point 38 L-shaped lever 39 Screw rod 40 Connecting rod 41 Bearing plate 42 Supporting point 43 Drive rod 44 Device frame

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of bag gripping arms paired to grip a bag are arranged at equal intervals around a table so as to be able to intermittently rotate, and a full-circumferential cam is provided below the table. A projection provided at the center of the lever, which is disposed and one end of which is pivotally supported and the other end of which is connected to the drive rod, is engaged with the lower surface of the circumferential cam, and the drive rod is moved up and down to swing the lever. ,
In addition to making the entire circumference cam slidable in the vertical direction of the rotation axis of the table, an L-shaped lever is attached to the lower surface of the table at the bag holding position, and the horizontal lever of the L-shaped lever rotates the table around the circumference cam. Glide with movement, while L
The vertical rod of the lever is brought into contact with one tail of the bag gripping arm pulled so as to sandwich the opposing interval by a spring so that the pulling is prevented, and on the other hand, the upper surface of the table has the same horizontal plane as this, and A star-shaped cam having inclined sides formed in the peripheral portion is arranged so that the relative positional relationship can be appropriately changed, and a locking pin connected between the tail portions of the opposing bag gripping arms so as to be simultaneously opened and closed. A bag gripping arm-to-opening degree adjusting device having a head protruding upward so as to be able to come into contact with an inclined side of the star-shaped cam, wherein a lower end of the drive rod in an apparatus frame is pivotably pivoted. The L-shaped lever is connected to one end of the L-shaped lever, notch grooves are formed on both sides of the other end of the L-shaped lever, and the L-shaped lever is engaged with pins protruding on both sides of the threaded pipe, so that the threaded pipe is rotatable. Threadedly engaged with the threaded rod supported by The rod is connected to the distal end of the handle provided on the outside of the device frame located below the table,
A bag gripping arm pair opening adjustment device for an automatic packaging machine, wherein the driving rod is driven by the handle.