JPH0584613U - Bag-holding arm pair opening adjustment device for automatic packaging machine - Google Patents

Abstract

(57) [Summary] [Objective] The purpose is to enable the safe and easy adjustment of the distance between the bag gripping arms even during operation. [Structure] In a bag gripping arm-to-opening adjustment device of an automatic packaging machine, a characteristic is that a handle position for adjustment operation is provided on the lower outside of the table.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a device for adjusting the opening of a bag gripping arm according to the size of a bag to be gripped in an automatic packaging machine.

[0002]

[Prior Art]

 Recently, food packaging has been diversifying, and there is a strong tendency for one machine to require filling packaging for different types of bags with different specifications. For this reason, in the conventional rotary type intermittently driven automatic packaging machine, in order to match the bag gripping arms with bag widths of different standards, a large number of gripping arms of the bag gripping devices arranged around the rotary table are used. It is adjusted each time.

FIGS. 3 to 7 show a bag gripping arm-to-opening adjusting device of the bag gripping device. The bag gripping arms 2, 2 ′ have claws 3 and 3 ′ facing each other at an interval l of the bag 4. The width is changed according to the width. Specifically, below the table 1, there is provided a full-circumferential cam 5 whose circumferential end is vertically upward and formed to have a predetermined height difference, and this full-surrounding cam 5 intermittently drives the table 1. The rotary shaft 6 is fitted into the rotary shaft 6 so that it does not rotate together with the rotary shaft 6 and allows only vertical sliding. Further, an inverted L-shaped lever 10 is attached to a bearing portion 11 provided on a side surface portion of a boss 8 provided upright on the apparatus frame 7 via a fulcrum 12, and the tip of the lever 10 is attached to the entire circumference cam 5. The lower end of the screw shaft 9a is engaged with a screw shaft 9a that is rotatably supported by the lower portion of the bearing 11, and a handle 9 is provided at the end of the screw shaft 9a. When it is rotated right or left, the inverted L-shaped lever 10 is rotated about the fulcrum 12 via the screw shaft 7a, and the entire circumferential cam 5 engaged with the tip of the lever 10 is moved up and down.

Further, a bearing box 13 having a constant length is hung from the rear surface of the table 1 toward the all-round cam 5, and a corner portion K of the L-shaped lever 14 is provided at the lower end portion thereof. ), And a freely rotating roller 15 is attached to the tip of the horizontal lever 14 of the lever 14 so that the lever 15 slides on the circumferential end edge of the cam 5. At the same time, a freely rotating roller 16 is attached to the upper end of the vertical rod 14b, and a tail portion m formed to project at the rear portion of one of the bag holding arms 2 and 2 '(2 in the illustrated example) arranged opposite to each other. It comes to abut. At this time, the gripping arms 2 and 2'are rotatably attached to the position of the back surface of the table 1 by means of the pins 17 and 17 and the springs 18 are hooked around their respective central parts so that the facing distance l is always maintained. It is pulled so as to be narrowed in the directions of the arrows (d) and (d), and for this reason, it is attempted to spread in the direction of the arrow (e) on the side of the tail portion m of the gripping arm 2 by the roller 16 of the vertical rod 14b. It is supposed to be blocked by. The other gripping arm 2'and the above-mentioned gripping arm 2 are adapted to engage with each other at an inner central position, so that the supporting rods 2a, 2a are located at the inner surface positions of the gripping arms 2, 2'which face each other. The upper support rod 2a is provided with a locking pin 20 while the upper support rod 2a is provided with a slit 19 in a certain length range. The head portion is projected for a certain length, and the lower portion is fitted into and engaged with the slit 19 of the supporting rod 2a ', whereby the bag gripping arm 2'operates in synchronization.

Next, a star-shaped cam 21 is provided at the tip of the rotary shaft 6 of the table 1 so that its inclined side portion f can be rotationally adjusted so as to be in contact with the head of the locking pin 20. The knob 22 is provided, and the rotation is adjusted by turning the knob 22 in the clockwise direction or the counterclockwise direction as appropriate. The adjusting means, as shown in FIG. 4, is a female screw that is screwed onto the male screw of the shaft 23 so that the shaft 23 moves up and down by rotating the knob 22 clockwise or counterclockwise with respect to the table 1. Is provided with a built-in bearing 24, and the upper end of the shaft 23 is projected from a relatively large through hole 25 formed in the plate surface of the star-shaped cam 21, and the lower end of the shaft is slightly separated from this. A slit 26 is bored in a certain length range, and a U-shaped bearing portion 27 is fixed to the back surface of the table so that the inner groove g of the bearing portion 27 corresponds to the slit 26. The L-shaped lever 28 is attached by swinging in the directions of arrows (f) and (g), and a slide groove 29 is bored in the horizontal rod end 28a of the lever 28, and is attached to the lower end of the one-way knob shaft 23. The horizontal rod 30 is inserted and engaged so that the star-shaped cam 2 A slit 31 having a constant length is formed at a relative position orthogonal to the internal groove g, and the vertical rod 28b of the L-shaped lever 28 is provided with a roller 32 adapted to be in sliding relation with the slit 31. The engaging rod 33 is attached.

Therefore, when the knob 22 is rotated and the shaft is moved up and down, the L-shaped lever 28 swings about the pin 34 as a fulcrum in the directions of arrows (f) and (g), and the engagement rod 33 is accordingly moved. The star cam 21 is rotated around the rotation shaft 6 in the directions of arrows (h) and (r) via the roller 32. At this time, when the star cam 21 is rotated in the (h) direction, the inclined side portion of the star cam 21 is rotated. The facing distance between f and the locking pin 20 becomes closer, and the pin is adjusted so as to be separated when rotated in the (i) direction.

As is clear from the above description, according to the bag width to be used in the handle 9, the space l between the bag gripping arms 2 and 2 ′ is provided around the table before operation (8 sets in the figure). ) Can be adjusted at the same time. On the other hand, the knob 22 opens the bag mouth by narrowing the space 2 between the arms 2 and 2 ′ when charging the filling, or widens the space l when sealing the bag. Used individually when closing the.

[0008]

[Problems to be solved by the device]

 As described above, it is necessary to perform the work of adjusting the distance between the bag gripping arms using the handle each time the bag width used changes, but as the number of bag types increases recently, the number of times increases. It tends to increase. However, in the conventional device, the handle is installed below the table (on the back side) (see Fig. 7), and the operability is poor and there is a safety problem if adjusted during operation, and it is difficult to clean. was there.

[0009]

[Means for Solving the Problems]

 The present invention is intended to solve the above-mentioned problems, and is characterized in that a plurality of bag-holding arms paired so as to hold a bag are arranged around a table at equal intervals. Around the circumference of the table, a cam is arranged so that it can rotate, and a full-circumference cam is arranged below the table, and a protrusion is provided at the center of the lever, one end of which is pivotally supported and the other end of which is connected to a drive rod. Engage with the lower surface and move the drive rod up and down to swing the lever so that the full circumference cam can slide in the vertical direction of the table rotation axis. A lever is attached so that the horizontal rod of the L-shaped lever slides on the entire circumference cam as the table rotates, while the vertical rod of the L-shaped lever is pulled by a spring so as to narrow the facing distance. One tail of bag-holding arm and upper traction is blocked On the other hand, the same horizontal plane as the upper surface of the table, and a star-shaped cam with inclined sides formed in the peripheral part are arranged so that the relative positional relationship can be changed appropriately, and face each other. A pair of bag-holding arms configured so that the heads of the locking pins connected so that the tails of the bag-holding arms are simultaneously opened and closed can be projected upward to contact the inclined sides of the star-shaped cam. In the opening degree adjusting device, a handle for driving the drive rod is provided at a lower outer position of the table.

[0010]

[Action]

 Since the handle that drives the drive rod and moves the entire circumference cam up and down is located at the outer side of the lower side of the table, turning the handle to the left or right drives the drive rod and adjusts the distance between the bag gripping arms. It will be easy and easy to operate.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. 1 and 2 show the essential parts of the bag gripping arm-to-opening adjusting device of the present invention. As shown in the drawing, the structure of the present invention is for adjusting the distance between the bag gripping arms 2, 2 '. The position of the handle 9 to be used is provided on the outer side of the lower side of the table 1, and the other device configurations are the same as those shown in FIGS.

As shown in FIGS. 1 and 2, a full-circumferential cam 5 is fitted on the rotary shaft 6 of the table 1. One end of the full-surrounding cam 5 is pivotally supported at a fulcrum 37 and the other end is driven. The 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 through a support plate 41 attached to the device frame 44 and a fulcrum 42, and the other end of the L-shaped lever 38 is connected to the support plate. A screw rod 39, which is rotatably supported by the shaft 41, is screw-fitted to the screw rod 39. On the other hand, a handle 9 is installed on the side surface of the device frame 44, and the tip of the handle 9 and the screw rod 39 are connected via a connecting rod 40.

The operation of the handle operating mechanism of the present invention will be described. When the handle 9 is first rotated right or left, this rotation is transmitted to the screw rod 39 via the connecting rod 40, and the end of the L-shaped lever 38 screw-fitted with the screw rod 39 moves in the arrow direction. The lever 38 swings around the fulcrum 42, and therefore the drive rod 43 connected to the lever 38 slides in the vertical direction, which causes the lever 36 to swing around the fulcrum 37 and project. The entire circumference cam 5 is moved up and down via the portion 36a.

Thus, when the distance l between the bag gripping arms 2 and 2 (see FIGS. 3 to 6) is determined according to the bag width to be used, the handle 9 is first rotated to move the screw rod 39 in the right or left direction. Then, the entire circumferential cam 5 is moved upward and downward via the L-shaped lever 38, the drive rod 43 and the lever 36. As a result, the tip roller 15 of the horizontal rod 14a of the L-shaped lever 14 slides in the vertical direction of the rotary shaft 6 while being positioned on the high flat part v of the circumferential edge of the horizontal rod 14a. Then, the L-shaped lever 14 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 portion m of the bag gripping arm 2.

For example, when the handle 9 is turned and the lever 36 is swung upward, the all-round cam 5 moves upward, the L-shaped lever 14 rotates in the (b) direction, and the gripping arms 2 and 2 ′ are separated. When l becomes large, a bag having a large bag width can be gripped, and conversely, when the handle 9 is rotated in the reverse direction to swing the lever 36 downward, the entire circumference cam moves downward and the L-shaped lever 14 ( When the bag is swung in the direction (a), the interval l between the gripping arms 2 and 2'is reduced, and a bag with a small bag width can be gripped. Since the handle 9 is installed on the side of the device frame 44 outside the table 1 as shown in FIGS. 1 and 2 during such a handle operation, it can be operated safely and easily even during machine operation. It will be possible.

[0016]

[Effect of the device]

 As described above, in the bag gripping arm pair opening adjustment device of the present invention, the handle for driving the drive rod is provided at the outer position on the lower side of the table. Therefore, the handle is rotated left or right to drive the drive rod. When the cams are moved up and down to adjust the distance between the bag gripping arms, the operation can be performed safely and easily even while the machine is operating, and the device can be easily cleaned.

[Brief description of drawings]

FIG. 1 is a view showing a main part of a bag gripping arm pair opening adjustment device of the present invention.

FIG. 2 is a plan view showing a main part of the bag gripping arm pair opening adjustment device of the present invention.

FIG. 3 is a diagram showing an overall configuration of an automatic packaging machine according to the present invention.

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

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

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

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

[Explanation of symbols]

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

Claims (1)

[Scope of utility model registration request] 1. A plurality of bag gripping arms paired so as to grip a bag are arranged at equal intervals around a table so as to be capable of intermittent rotation, and a full circumference cam is provided below the table. The protruding portion provided at the center of the lever, which is arranged and has one end rotatably supported and the other end connected to the drive rod, engages the lower surface of the full circumference cam, and the drive rod is moved up and down to swing the lever. ,
In addition to making the all-round cam slidable in the vertical direction of the rotary shaft 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 rotates the table around the all-round cam. Not to slide with movement, while L
The vertical lever of the lever is brought into contact with one tail of the bag gripping arm pulled by a spring so as to narrow the facing distance so as to prevent the pulling, and on the other hand, the upper surface of the table has the same horizontal plane as this, and A star-shaped cam with inclined sides formed on the periphery is arranged so that the relative positional relationship can be changed as appropriate, and a locking pin connected so that the tail portions of the bag-holding arms facing each other are simultaneously opened and closed. A bag gripping arm pair opening adjustment device having a head protruding upward so as to come into contact with an inclined side of the star-shaped cam, wherein a handle for driving the drive rod is provided outside the lower side of the table. An apparatus for adjusting the bag gripping arm pair opening degree of an automatic packaging machine, which is provided at one side position.