JPH1135020A - Label bonding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To retract a sucking head for sucking and holding a label from an article of commerce timely with a good responsiveness after a label is bonded, in a label bonding device which presses a label issued from a label printer against an article of commerce to bond it to the article. SOLUTION: If a servomotor 11 is rotated in a direction (a), a sucking head 32 and push rods 40, 40 are lowered toward an article of commerce disposed below, and if it is rotated in a direction (b), these members are raised apart from the article. If the head 32 and rods 40, 40 descend at constant speeds and make contact with the article, a reaction force due to the contact acts on the motor 11 as a drive load. The motor 11 increases a torque to lower the head 32 and rods 40, 40 at constant speeds against the reaction force, whereupon the rotation direction of the motor 11 is reversed to raise the head 32 and rods.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label sticking apparatus, in particular, a label issued from a label printer, received and held by a holding member, and then the holding member is moved forward and backward with respect to the product, so that the label is transferred. The present invention relates to a label sticking device that is configured to be pressed against and attached to a product.

[0002]

2. Description of the Related Art Generally, in a backyard of a supermarket or the like, a label pasting apparatus for automatically pasting a priced label on which a product name, price, expiration date, and the like are printed to a packaged product is transported by a transport conveyor, for example. A label holding member that is disposed above the product to be printed and that holds the label that is fed from the label issuing port of the label printer that prints and issues the priced label by negative pressure, and holds the holding member to the product below. And a drive device for moving the holding member forward and backward, and when the holding member advances to the product, the label held by the member is pressed against the product and affixed thereto. .

In such a case, it is important in this type of label sticking apparatus to appropriately set the timing of switching the label holding member from the advance movement to the backward movement. If the switching timing is early, the holding member retreats from the product before the label held by the label holding member is pressed against the product, and the label is not attached to the product. Is too slow, the label holding member excessively presses the product, and the product may be damaged.

Therefore, Japanese Patent Publication No. Hei 7-2495 discloses that
A motor as a drive device for moving the label holding member forward and backward with respect to the product; and a rotary encoder for detecting a change in rotation speed of an output shaft of the motor, wherein the output rotation speed of the drive motor is kept constant and the holding is performed. A technique for switching the label holding member from the advance movement to the backward movement when the rotary encoder detects a decrease in the output rotation speed of the motor while the member is moving forward at a constant speed with respect to the product is disclosed. Have been. That is, when the holding member and the product start to come into contact with each other due to the advance movement of the label holding member, a drag is generated against the advance movement of the holding member due to the contact, and the drag becomes a rotational driving load on the drive motor. Appearing, and the rotation speed of the motor decreases, and when a decrease in the output rotation speed of the motor or a decrease in the advance movement speed of the label holding member is detected, the holding member and the product are surely connected. Are in contact with each other, and it is determined that labeling has been completed.

[0005]

However, in the technique disclosed in the above-mentioned publication, although the label is stuck, the possibility of product damage due to the pressing of the label holding member cannot be avoided.

That is, from the viewpoint of sticking a label, it is sufficient that the label holding member and the product come into contact with each other, and it is unnecessary to move the label holding member forward from the time of the start of the contact. May be excessively pressed and may be damaged. However, in the technology disclosed in the above publication, after the label holding member comes into contact with a product, the holding member is moved forward until the rotation speed of the motor or the moving speed of the label holding member is actually reduced due to the contact. As a result, the possibility of damage to the product due to excessive advance movement or pressing of the label holding member increases.

In other words, in other words, when the rotational speed of the motor for moving the label holding member to advance and move at a constant speed or when the moving speed of the holding member is actually lowered, the label holding member and the product are not connected. In this sense, the technology disclosed in the above-mentioned publication is inferior in the response of the switching timing of the forward / backward movement of the label holding member.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a label sticking apparatus capable of moving the holding member backward from the product as quickly as possible after contact between the label holding member and the product.

[0009]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention is characterized by having the following configuration.

That is, the invention described in claim 1 in the claims of the present application (hereinafter referred to as "first invention").
Has a label holding member for holding a label fed from a label issuing port, and a driving means for moving the holding member forward and backward with respect to the product so that the label held by the holding member is attached to the product. Detecting means for detecting a change in a driving load acting on the driving means when the label holding member advances to the product, wherein the driving means detects a detection result of the detecting means. , The label holding member is switched from the advance movement to the backward movement.

Further, the invention according to claim 2 (hereinafter referred to as “second
Invention ". In the first aspect of the present invention, the driving unit has a motor configured to generate a driving force according to the applied current, and the detecting unit controls the motor to generate a predetermined driving force. A change in the drive load acting on the drive means is detected based on a change in the current applied to the drive means.

According to these inventions, when the label holding member advances and moves with respect to the product by the driving means, a change in the driving load applied to the driving means is detected by the detecting means, and the detection result is used as the detection result. Based on the above, the driving means switches the label holding member from the advance movement to the backward movement, so that the switching timing is performed at an early time after the contact between the label holding member and the product.

That is, at the time of contact between the label holding member and the product, a drag is generated against the advancing movement of the holding member. At this point, the above-mentioned drag acts on the driving means as a driving load. Switching the forward / backward movement of the label holding member based on the change in the driving load is further based on a decrease in the actual moving speed of the label holding member advancing and moving in time after the change in the driving load occurs. Switching between the forward and backward movement of the holding member is earlier in time after the contact between the label holding member and the product, so that the switching responsiveness of the forward and backward movement of the holding member is improved, and excessive pressing of the label holding member is performed. Therefore, troubles such as damage to the product due to the above are suppressed.

[0014] In particular, in the second invention, the driving means and the detecting means are further embodied. According to this, the above-described current is generated so as to generate a predetermined driving force for a motor which generates a driving force according to an applied current. Is controlled, when a drive load is applied to the motor due to the contact between the label holding member and the product, a current change occurs to overcome the drive load and maintain the predetermined drive force. The change in the driving load is detected based on the change in the current.

[0015]

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

As shown in FIG. 1, in this embodiment, a label sticking apparatus 1 according to the present invention is disposed above a transport conveyor C for transporting a weighed and packaged product X to a predetermined shipping station. A label L with a price fed out and issued from a label issuing port W of an adjacent label printer 2 is received by a suction head 32 described later, and is attached to a product X on a conveyor C below.

Inside the label printer 2, a roll 3 of a label sheet S in which a number of labels L...
While the label sheet S pulled out from the printer is guided by the plurality of guide rollers, predetermined print information is printed on the label L while passing between the thermal print head 4 and the platen roller 5, and the peeling rod at the label issuing port W The printed label L is peeled off from the backing sheet B by being bent at a steep angle in 6. The label L peeled off at the peeling point P is protruded and supplied to the adhering device 1 by the movement of the backing sheet B, and only the backing sheet B is wound up by the collection roll 7.

Next, the structure of the label sticking apparatus 1 will be described. As shown in FIGS. 2 and 3, the apparatus 1 has a rectangular cylindrical main body frame 10 extending vertically. The servomotor 11 is mounted on the upper part of the front vertical wall 10a. The function and operation of the servo motor 11 will be described later in more detail. A pair of upper and lower timing pulleys 12a and 12b are rotatably provided on the same front vertical wall 10a, and a timing belt 13 is wound around the pulleys 12a and 12b. A large-diameter driven pulley 14 is connected to the rotation shaft 12c of the upper timing pulley 12a outside the vertical wall 10a.
A transmission belt 16 is wound around a drive pulley 15 provided on the output shaft 11a of the servo motor 11 and a pair of upper and lower members is driven by the rotation of the motor 11 in forward and reverse directions (directions of arrows a and b). The timing belt 13 between the pulleys 12a and 12b runs in the vertical direction.

In the timing belt 13, an arm member 17 is fixed to a running surface 13a on the left side of the pulleys 12a and 12b, and a support plate 18 having a plurality of horizontal walls is connected to the arm member 17. The support plate 18 includes a first horizontal wall portion 18a to which the arm member 17 is fastened, a second horizontal wall portion 18b one step lower than the first horizontal wall portion 18a on the front side, and a first horizontal wall portion. And a third horizontal wall portion 18c that is one step lower on the right side than the first horizontal wall portion 18a.
8c a pair of front and rear slide rods 1 extending vertically
The upper ends of 9 and 19 are fixed. The slide rods 19, 19 are attached to the right side vertical wall 10b of the main body frame 10.
U-shaped support block 20 attached to the lower part of
The lower plate 21 having a single horizontal wall portion is bridged between the lower end portions thereof as shown in FIG. Have been. Thereby, the timing belt 1
3 supports the support plates 1
8, slide rods 19, and lower plate 21
(Hereinafter, appropriately referred to as “elevating unit U”) ascend and descend together.

Timing pulleys 22, 22 are rotatably provided on the third horizontal wall portion 18c of the upper support plate 18 and the lower plate 21 at positions between the slide rods 19, 19, respectively. A second timing belt 23 is wound around these pulleys 22,22. In the timing belt 23, a connecting arm 24 extending below the first horizontal wall portion 18a of the support plate 18 is fixed to a traveling surface 23a on the left side of the pulleys 22, 22, and a traveling surface 2a on the right side.
3b is fastened to the inner surface 20b of the support block 20. As a result, the timing pulleys 22 move up and down as a result of the lifting unit U moving up and down. A part of the timing belt 23 wound between these pulleys 22 and 22 moves toward the frame 10 side. By being fixed, the second timing belt 2
3, the left traveling surface 23a is at the elevation speed 2 of the elevation unit U.
The connecting arm 24 fixed to the belt 23 moves up and down at twice the moving distance of the lifting unit U with respect to the main body frame 10.

In the elevating unit U, a top plate 26 is provided on the first horizontal wall portion 18a of the upper support plate 18 through columns 25... 25, and a support rod extending vertically to the top plate 26 and the support plate 18 is provided. Upper portions 27 are rotatably supported, and a large-diameter driven pulley 28 is integrally provided on the support rod 27 between the top plate 26 and the support plate 18. on the other hand,
A stepping motor 29 is attached to the lower surface of the second horizontal wall portion 18b of the support plate 18 (see FIG. 6), and a drive pulley 30 provided on an output shaft 29a projecting upward from the second horizontal wall portion 18b. The second transmission belt 31 is wound between the driven pulley 28 and
The forward and reverse rotation of the motor 29 causes the support rod 27 to rotate around its vertical axis as shown by arrows c and d.

At the lower end of the support rod 27, a label suction head 32 for receiving a label L fed out and issued from an issuing port W of the printer 2 is attached.
The suction head 32 has a box shape having an upper surface 32a to which the support rod 27 is connected, a lower surface 32b that is partially inclined, and one open side surface 32c, and a blower is provided through the open surface 32c. As shown in FIG. 4, a pair of elongated elliptical openings 34 are formed on the upper surface 32a and the lower surface 32b with the connecting portion of the support rod 27 interposed therebetween.
a, 34a; 34b, 34b are formed corresponding to each other. A cover in which a plurality of (a pair of three in the illustrated example) circular openings 35a... 35a located in these elliptical openings 34a, 34a; 34b, 34b in a plan view is arranged in two rows on the upper surface 32a. A member 35 is attached. When the fan device 33 is driven by a motor (not shown), a negative pressure is generated in the internal space of the suction head 32, and a lower surface 32 b of the head 32 is formed.
A suction force is generated in the elliptical openings 34b, 34b of the label L.
Is sucked and held by the suction head 32.

On the other hand, the connecting arm 24 fastened to the double speed timing belt 23 has a horizontal support surface 24a located below the first horizontal wall portion 18a of the upper support plate 18 in the elevating unit U. On the surface 24a,
As shown in FIG. 5, a rotary block 36 having a cylindrical boss 36a is rotatably fitted in a horizontal plane via the boss 36a and a ring-shaped bearing 37. A screw portion 36b is formed at the upper end of the boss portion 36a, and a nut 38 is screwed into the screw portion 36b to prevent the rotation block 36 from dropping. A pair of linear bearings 39, 39 disposed opposite to each other are housed in the boss portion 36a, and the suction head 32 is connected to the first support plate 18 of the upper support plate 18 via these linear bearings 39, 39. A support rod 27 suspended from the horizontal wall portion 18a slidably passes through the rotating block 36. In this case, the support rod 27 has two concave grooves 27a, 27 corresponding to the linear bearings 39, 39.
When the support rod 27 is rotated by the rotation of the stepping motor 29 when the grooves 27a, 27a are fitted with the balls of the linear bearings 39, 39, the rotating block 36 is formed. Also pivots in a horizontal plane with respect to the connecting arm 24.

The rotary block 36 is formed with a flange 36c. The flange 36c has two rows of circular openings 3 corresponding to the circular openings 35a... 35a of the cover member 35 of the label suction head 32.
6d... 36d are arranged side by side, and upper end portions of a pair of push rods 40, 40 extending in the vertical direction respectively into a predetermined pair of openings 36d, 36d (openings 36d, 36d on the rightmost side in the drawing in the figure) in each row. Is inserted and bolt 4
1, 41 fixed. Push rod 40,
The lower end of 40 penetrates through the corresponding circular openings 35a, 35a (openings 35a, 35a closest to the fan device 33 in the illustrated example) in the cover member 35 of the suction head 32, and the elliptical opening 34a of the upper surface 32a of the suction head 32. , 34a and into the internal space of the head 32. And
At the lower ends of the push rods 40, 40, there are provided bellows members 42, 42 formed of a soft material such as silicone resin and having a structure capable of expanding and contracting in the vertical direction.

Next, the operation of attaching the label L performed by the label attaching apparatus 1 will be described. The servo motor 11 that raises and lowers the lifting unit U is controlled by the generated torque or the lifting unit U in accordance with the magnitude and direction of the applied current.
Is configured to be able to control the ascending / descending speed and switching between ascending and descending. Further, a stepping motor 29 for rotating the support rod 27 is provided on the second horizontal wall portion 18b of the upper support plate 18 via a bracket 43, and includes a photosensor 44 having a light emitting portion and a light receiving portion, and a stepping motor 29. The light shielding plate 4 provided integrally with the output shaft 29a and having a large number of light transmitting holes 45a.
The rotation angle of the support rod 27 can be controlled via a rotary encoder formed by the support rod 5 and the rotary encoder 5.

First, the label sticking apparatus 1 uses the label L
2, the lifting unit U is raised to an upper position in the frame 10, and the lower surface 32b of the suction head 32, which is connected to the lifting unit U by the support rod 27 and moves up and down integrally, is received as shown in FIG. It is located at substantially the same height as the peeling point P of the label L at the label issuing port W. At this time, the suction head 32 is rotated so that the lower surface 32b of the suction head 32 is positioned on the peeling point P side, and the fan device 33 is driven at least at this label receiving position, and the lower surface of the suction head 32 is rotated. At the elliptical openings 34b, 34b of 32b, a suction force acting inside the head 32 is generated.

In this state, the printed label L is peeled off from the backing sheet B at the above-mentioned peeling point P, is fed out along the inclination of the lower surface 32b of the suction head 32, and is finally separated from the backing sheet B. The label L is sucked and held by the suction head 32 without falling off by the suction force generated in the elliptical openings 34b, 34b of the lower surface 32b by the driving of the lower surface 32b.

Next, the elevating motor 11 is driven to rotate in the direction of arrow a shown in FIG. 2, and the elevating belt 13 is caused to travel downward on the traveling surface 13a to which the elevating unit U is connected. As a result, the elevating unit U descends with respect to the main body frame 10 and the first horizontal wall portion 18a of the upper support plate 18 in the unit U causes the support rod 27 to move downward.
The label suction head 32 suspended through the head also descends integrally, and the label L held by the head 32 is held.
Approaches toward the product X on the conveyor C below.

On the other hand, a pair of upper and lower timing pulleys 2 provided on the third horizontal wall portion 18c of the upper support plate 18 and the lower plate 21 in the lifting unit U, respectively.
2, 22 also descend with the unit U. But,
At this time, the timing belt 23 wound between the pulleys 22 and 22 is fixed to the main body frame 10 via the support block 20 so that a part of one of the running surfaces 23 b is fixed to the belt 23. The connecting arm 24, which is connected to the other running surface 23a of the motor 23 and supports the rotary block 36 or the push rods 40, 40, moves at a speed equal to the speed at which the lifting unit U or the suction head 32 descends with respect to the main body frame 10. Therefore, with respect to the main body frame 10, the connection arm 24 is connected to the lifting unit U or the suction head 32.
Descend at twice the speed of In other words, the suction head 32
Is lowered by a predetermined distance from the first label receiving position, the push rods 40, 40 are lowered by twice the distance, and approach the product X below the suction head 32 more quickly.

As a result, as the suction head 32 descends, the push rods 40, 40 descend with a stroke twice as large as the head 32, and are located in the internal space of the suction head 32 at the label receiving position. The rod 40,
As shown in FIG. 6, the lower end portion of the label 40 finally projects downward from the lower surface 32b of the head 32 via elliptical openings 34b, 34b, and the label L sucked and held on the lower surface 32b is attached to the rod 40, 40 bellows members 42, 4 at lower end
The label L is pushed out toward the product X below by the label 2 and the label L is attached to the upper surface of the product X. At this time, the bellows member 4
2, 42 expands and contracts in the up-down direction at the time of contact with the product X to absorb the shock of the contact.

When the application of the label L is completed, the servo motor 11 is driven to rotate in the reverse direction as shown by the arrow b in FIG. 2, and runs upward on the running surface 13a to which the lifting unit U is connected in the lifting belt 13. Let it. As a result, the lifting unit U and the label suction head 32 or the push rods 40, 40 start to move upward, and at this time, the push rods 40, 40 rise at twice the speed of the suction head 32, and the bellows members 42, 42 Is the head 32 again
When the suction head 32 is moved up to the first label receiving position, the drive of the servomotor 11 is stopped.

In the above description, the label L issued from the label printer 2 is affixed to the commodity X below in the posture at the time of the issuance, but by rotating the stepping motor 29, the chain line in FIG. As shown in the figure, the suction head 3 is supported via the support rod 27 or the rotary block 36.
2 and the push rods 40, 40,
It is also possible to change the angle with respect to the product X and stick it.

Next, control of the switching timing of the lifting unit U from lowering to raising by the servo motor 11, which is a feature of the present invention, will be described.

First, as shown in Equation 1, the lifting servomotor 11 generates a rotation torque (T) having a magnitude proportional to the applied current (I).

[0035]

(Equation 1) The torque (T) is, as shown in Expression 2, the front vertical wall 1
The lifting drive force (L) increased by the reduction ratio (H) determined by the diameters of the pulleys 14 and 15 outside 0a acts on the lifting unit U.

[0036]

(Equation 2) Here, the reduction ratio (H) is expressed as in Equation 3.

[0037]

(Equation 3) The lifting drive force (L) is, as shown in Equation 4, the own weight (A) acting on the lifting unit U and the members assembled to the unit U, the lifting acceleration force (D), the pulley 12
The drive acceleration (D) is balanced with the drive load (F) including the frictional force (M) between the a and 12b and the lifting belt 13, and particularly when the lifting unit U is raised and lowered at a constant speed. It becomes zero.

[0038]

(Equation 4) Here, the self-weight (A) is expressed, for example, as in Equation 5, and the vertical acceleration force (D) is expressed as in Equation 6.

[0039]

(Equation 5)

[0040]

(Equation 6) Further, the elevation servomotor 11 is configured such that the direction of the rotation torque (T) changes according to the direction of the applied current (I), and the rotation direction of the output shaft 11a is reversed. .

Now, assuming that the descending direction a is a positive value and the ascending direction b is a negative value, when the ascending / descending unit U is stopped at the first label receiving position as shown by reference numeral in FIG. As indicated by the reference numeral, the current applied is controlled so that the torque generated by the servomotor 11 becomes a predetermined value in the rising direction b. That is, torque is applied upward so that the lifting unit U and the like do not drop by its own weight. Then, at time t1, the torque in the upward direction b is weakened as indicated by a symbol S, and further, the downward direction a is decreased for a predetermined period.
For example, the lifting unit U is lowered while gradually increasing the acceleration as shown by the reference numeral G, and is lowered at a constant speed from the time t2 as shown by the reference numeral G.

Next, when the bellows members 42, 42 come into contact with the product X at time t3, the push rods 40, 40 to which the bellows members 42, 42 are attached, the rotating block 36 supporting the push rods 40, 40 and the connecting arm 24. , An upward drag is generated in response to the downward movement, and this drag is further halved in magnitude through the second timing belt 23, and is finally lifted through the lifting unit U and the like. A new drive load (G) appears on the output shaft 11a of the motor 11 as shown in Expression 7 above.

[0043]

(Equation 7) However, at this time, since the control of the applied current is performed so as to lower the lifting unit U at a constant speed as indicated by the reference numeral h, the current is increased so as to overcome the driving load, and thereby the reference numeral Servo motor 1 as shown
1, the generated torque increases.

When the generated torque increases and exceeds the predetermined value P (at time t).
4), it is determined that the bellows members 42, 42 have come into contact with the product X and label sticking has been completed, and the upward torque is controlled to raise the elevating unit U. At time t5, the unit U is moved to the first label receiving position. (Stop).

As described above, in the label sticking apparatus 1,
When the elevating unit U or the label suction head 32 or the like is moved downward toward the product X by the elevating servomotor 11, a change in the drive load acting on the motor 11 is detected as a change in the applied current and the generated torque. Since the switching of the lifting unit U from the lowering to the raising is performed based on the detection result, the timing of the switching is performed at an earlier time after the contact between the bellows members 42 and 42 and the product X. Excessive bellows member 4 for product X
Pressing at 2 and 42 is avoided and product damage is reduced.

On the other hand, the bellows members 42 and 42 and the goods X
If the contact with the labeling device is determined, the switching timing is temporally delayed, so that the responsiveness of the switching timing of the labeling apparatus 1 is improved.

As another configuration of the label sticking apparatus 1, as shown in FIG. 3, a locking member 51 having a horizontal surface 51 a is attached to the upper support plate 18 of the lifting unit U, Frame 1
0 is provided with a solenoid 52 for moving the rod 52a up and down. Also, the main body frame 1
0, an L-shaped lever 53 is provided rotatably about a support shaft 53a, and one end of the lever 53 is connected to the distal end of the rod 52a.
At the other end of 3, a stopper member 54 that supports the horizontal surface 51 a of the locking member 51 from below is attached. The label attaching apparatus 1 is designed to power off the entire apparatus with the elevating unit U raised, and at this time, the solenoid 52 is operated, and the stopper member 54 engages the locking member 51. Is supported from below to prevent the lifting unit U from falling by its own weight.

Further, circular openings 35a... 3 through which push rods 40 are inserted are formed in the cover member 35 of the suction head 32 and the flange 36c of the rotary block 36, respectively.
Since a plurality of 5a, 36d... 36d are provided, the push rods 40, 40 for extruding the label L downward and sticking it to the product X according to the size of the label L to be issued and the like.
Can be changed.

Further, as the control of the rotation angle of the support rod 27, a method of controlling based on the rotation origin sensor formed by the photo sensor and the light shielding plate and the number of pulses applied to the stepping motor is used. May be used.

Further, the suction head 32 is moved up and down and rotated by the drive of the servo motor 11 for raising and lowering and the stepping motor 29 for rotation, so that the fan device 33 built in the head 32 is also raised and lowered and rotated. However, since the energizing line is extended in the fan device 33, the energizing line may be frequently bent by the movement of the fan device 33, which may cause a problem in durability.

In order to deal with this, for example, as shown in FIG.
02 is fixed, and the fan device 103 is attached thereto.
The label suction head 104 has a cylindrical outer peripheral surface, and the head 104 is slidably and rotatably fitted in the housing 102. A disk 107 through which a support rod 105 and a push rod 106 are inserted is rotatably provided in an upper opening of the housing 102, and a fan device 103
Opening 108 in the wall of the housing 102 with the
And a negative pressure is generated in the housing 102 or the suction head 104 by the operation of the fan device 103 so that a suction force for label suction acts on the lower surface 104 a of the head 104.

According to this, only the label suction head 104 and the like are moved up and down and rotated in the housing 102, and the fan device 103 is moved through the housing 102 to the frame 101.
Since it is fixed to the side, the conducting wire 109 is not twisted, and the durability is improved.

[0053]

As described above, according to the present invention,
After the contact between the label and the product, the holding member holding the label can be quickly moved back from the product with good responsiveness, so that trouble such as damage to the product due to excessive pressing of the label holding member is suppressed. .

[Brief description of the drawings]

FIG. 1 is a front view showing an arrangement position of a label sticking apparatus according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing the internal configuration of the label sticking apparatus.

FIG. 3 is a partially cutaway plan view of the label sticking apparatus.

FIG. 4 is a plan sectional view taken along the line AA in FIG. 2;

FIG. 5 shows a support rod for supporting the label suction head,
FIG. 4 is an enlarged vertical sectional view showing an engagement relationship with a rotating block supporting a push rod.

FIG. 6 is a partially cutaway front view showing a sticking operation by the label sticking apparatus.

FIG. 7 is a time chart in the pasting operation.

FIG. 8 is a partially cutaway front view showing another embodiment of the label suction head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Label sticking apparatus 10 Main body frame 11 Elevating servomotor 13 Elevating belt 17 Arm member 18 Support plate 20 Support block 23 Double speed belt 24 Connecting arm 27 Support rod 27a Groove 29 Rotating stepping motor 32 Label suction head 33 Fan device 34b Head Lower elliptical opening 36 Rotating block 39 Linear bearing 40 Push rod 42 Bellows member X Product L Label

Claims (2)

[Claims] 1. A driving device having a label holding member for holding a label fed from a label issuing port, and moving the holding member forward and backward with respect to the product so that the label held by the holding member is attached to the product. Means for detecting a change in a driving load acting on the driving means when the label holding member advances into the product, wherein the driving means comprises Wherein the label holding member is switched from advancing movement to retreating movement based on the detection result of (1). 2. The driving unit has a motor configured to generate a driving force according to an applied current, and the detecting unit is applied so that the motor generates a predetermined driving force. 2. The label sticking apparatus according to claim 1, wherein a change in a driving load acting on the driving unit is detected based on a change in the current when the current is controlled.