JP5076886B2 - Labeling device - Google Patents

Description

  The present invention relates to a label affixing device that affixes a label to an article (label affixed object) conveyed on a conveyance line. Specifically, a label affixing means receives and holds a label issued from a label issuing unit, The present invention relates to a label affixing device that is pressed against an article for pasting.

There are already labeling devices that use air cylinders to attach labels with predetermined items (product names, prices, unit prices, barcodes, additives, production locations, etc.) to articles conveyed by conveyors on the conveyance line. It is known (see, for example, Patent Document 1).
However, since the label crimping member with suction means for sucking and holding the label is directly moved (up and down) by the air cylinder, complicated control using a timer or contact switch is required to control the stroke of the label crimping member. It becomes.
For example, if the control of the timing at which the label pressing member leaves the article after making contact with the article is wrong, the article may be damaged.

Japanese Patent No. 3997665

  The present invention has been made in view of the above-described problems of the prior art, and does not require a timer, a contact switch or the like to control the stroke of the label applying means in the label applying apparatus, and damages the article. An object of the present invention is to provide a label affixing device that can reliably affix a label without any problems.

In order to achieve the above object, the label applicator of the present invention is a label applicator that receives a label issued from a label issuing unit, applies the received label to a label application object, and applies the label. A label affixing means having a label suction holding part for receiving and holding the label issued from the label issuing part with the glue surface facing outward, and a link mechanism for reciprocating the label affixing means toward the label application object; A driving source that operates the link mechanism; and an urging unit that urges the label applying unit in a direction in contact with a label applying object via the link mechanism, wherein the urging unit is the driving source. The arm of the link mechanism that is swung by the arm is stretched between the rotationally displaced portions, and the urging force is maximum at the initial position of the label applying means, and the label It decreases as the urging means moves toward the labeling object, and characterized the structure of affixing a label to labeling object by 該付 force (claim 1).
Examples of the drive source include a fluid pressure cylinder such as an air (pneumatic) cylinder or a hydraulic (hydraulic pressure) cylinder that is generally used today, or a pulse motor. And the attachment of the fluid pressure cylinder sets the rod of the cylinder in the extended state at the initial position of the label applying means.
The initial position of the label affixing means refers to a position to stand by for holding the label issued from the label issuing unit by suction, that is, a stroke base point.

  According to the above-described means, the link mechanism is swung by the operation of the drive source, and the label sticking means is subject to label sticking by the swing of the link mechanism and the biasing force of the biasing means stretched across the arm of the link mechanism. Move toward the object and apply the label against the article. The force by which the label sticking means is pressed against the label sticking object decreases the biasing force of the biasing means as the label sticking means moves. The impact of is small. Therefore, it can prevent that the to-be-applied surface of a label sticking target object is damaged. Moreover, since the pressing and sticking of the label to the label sticking object is performed by the biasing force of the biasing means, it is not necessary to control the stroke of the label sticking means with a sensor or the like.

The specific structure of the device is that the link mechanism includes a first arm and a second arm having the same turning radius, the biasing means is a tension spring, and the rotating end of the first arm is The label pressing means is connected to the middle of the label pressing shaft in the longitudinal direction, and the rotating end of the second arm is slidable and rearward from the connecting portion of the first arm of the label pressing shaft. One end of the tension spring is engaged between the rotation center of the second arm and the sliding portion with respect to the label pressing shaft, and the other end of the tension spring is connected to the rotation of the first arm. A rod end from the drive source is connected to the projecting end portion that protrudes from the center of movement to the opposite side of the connecting portion with the label pressing shaft, and is further connected to the second arm.
The sliding portion of the second arm with respect to the label pressing shaft has a sleeve fixed to the end of the second arm, and the sleeve can be slid through the label pressing shaft, or the end of the second arm. Any form may be used, such as opening a through hole through which the label pressing shaft passes.
Further, the rod from the drive source is connected to a rod that expands and contracts when the drive source is a fluid pressure cylinder, and a rod that converts rotational motion into reciprocating motion when the drive source is a pulse motor. Connected.

  According to the above means, when the drive source is activated (for example, the rod of the fluid pressure cylinder is contracted) and the second arm is rotated, the biasing means stretched between the second arm and the first arm is provided. The tension spring acts in the contraction direction, the first arm is rotated by the contraction force, and the label pressing shaft of the label application means is moved in the label application direction following the rotation of the second arm. The urging force (tensile force) of the tension spring of the urging means decreases as the label adsorbing / holding portion of the label applying means approaches the label application object, and the label is applied with a weak urging force. Therefore, the impact of the label application target on the surface to be applied is small, and damage can be prevented.

The distance L1 from the center of rotation of the first arm of the tension spring to the engaging portion and the distance L2 from the center of rotation of the second arm of the tension spring to the engaging portion are L2> L1. ).
In this case, with respect to the amount of movement of the engaging portion of the tension spring of the second arm rotated by the drive source, the amount of movement of the engaging portion of the tension spring of the first arm rotated through the tension spring , So that the tension force of the tension spring gradually changes. That is, when the label sticking means moves in the sticking direction (forward movement), the tensile force gradually decreases, and when the label sticking means moves in the direction to return to the initial position (backward movement), the tensile force gradually increases. No time lag is caused in the operation of the first arm and the second arm.

Further, the first arm and the second arm constituting the link mechanism may be capable of changing the length of the turning radius according to the stroke of the label attaching means.
As a method of changing the length of the turning radius of the first arm and the second arm, several types of arms having different lengths of the turning radius are prepared in advance and the arm is exchanged according to the stroke, or a single For example, a method may be used in which a plurality of holes at the center of rotation are opened in the arm at intervals along the length direction, and the positions of the holes to be used are changed according to the stroke. In the case where a plurality of holes are opened in a single arm, the position of the engaging portion of the tension spring is also changed according to each hole.

  According to the above means, the stroke of the label applying means can be changed by changing the turning radius (arm length) of the first arm and the second arm of the link mechanism. Therefore, when changing the stroke of the label applying means, it is possible to easily cope with the change of the stroke of the label applying means by changing the turning radius (arm length) of the arm without changing the drive source (for example, a fluid pressure cylinder). it can.

  Further, a fluid pressure cylinder is used as the drive source, and the label adsorbing / holding portion of the label sticking means is brought into contact with the label sticking object by the biasing force of the biasing means at a stage before the contraction end of the fluid pressure cylinder. (Claim 5). That is, at a point just before the rod of the fluid pressure cylinder reaches the contraction end, the label suction holding part abuts against the label application object by the urging force of the urging means so that the label is pressed against the surface to be applied.

  According to the above means, the rod of the fluid pressure cylinder is positioned in front of the contraction end when the label suction holding part of the label attaching means is pressed against the surface to be attached of the label attaching object. Continue operation until end of contraction is reached. As a result, the second arm rotates counterclockwise, and the end of the second arm pushes down the end of the label pressing shaft of the label applying means. As a result, the label pressing shaft of the label applying means is rotated clockwise around the connecting portion with the first arm, and the label suction holding portion is moved upward while being pressed against the surface to be applied. Therefore, the label pressed on the surface to be pasted is applied with a scissors by the upward movement of the label suction holding portion and firmly stuck.

According to the label sticking device of the present invention, the label sticking means is biased in the sticking direction as the label sticking means moves forward, that is, moves in the direction in which the label is stuck on the label sticking object. Since the urging force of the urging means is reduced, the impact on the adherend surface can be reduced during label sticking, thereby preventing damage to the adherend surface. In addition, since the label is affixed by the urging force of the urging means, it is not necessary to control the drive source using a sensor or the like.
Further, the both ends of the tension spring of the urging means are stretched across the place where the arm of the link mechanism is rotationally displaced, so that one end of the urging means is engaged with the fixed member and only the other end is displaced. Compared with the method attached to the, the urging means expands and contracts as both ends move, so the space for expanding and contracting the urging means (tensile spring) can be small and can be accommodated in a limited space Therefore, it is possible to contribute to downsizing of the apparatus.

  Further, according to the structure of claim 3, when the label applying means moves (forward movement) in the applying direction, the tensile force gradually decreases, and the impact (damage) applied to the surface to be applied is reduced at the time of applying the label. When the label attaching means moves (returns) in the direction to return to the initial position, the pulling force gradually increases and does not cause a time lag in the operation of the first arm and the second arm.

  Further, the stroke of the label applying means can be changed by the configuration of the fourth aspect. Therefore, when changing the stroke of the label applying means, it is possible to easily cope with the change of the stroke of the label applying means by changing the turning radius (arm length) of the arm without changing the drive source (for example, a fluid pressure cylinder). it can.

  Further, according to the configuration of claim 5, the label sticking means (label adsorbing holding portion) that presses the label against the surface to be stuck moves so as to stroke the stuck label by the operation until the fluid pressure cylinder reaches the contraction end. . Thereby, a label can be firmly affixed with respect to a to-be-applied surface.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a label sticking device according to the present invention will be described based on the drawings.
FIG. 1 is an external view showing a use state in which a label sticking device is arranged on a transport line, and a support column 102 stands on the side of a transport table 101 ′ having a conveyor 101 for transporting an article (object to be labeled) a. Then, the label issuing and sticking apparatus A is disposed on the support column 102 via a bracket, and the display operation unit 103 is disposed on the support column 102.

The label issuing and sticking device A is composed of a label printing issuing unit A1 and a label sticking device A2, and sticks a label b issued from the label printing issuing unit A1 to an article a conveyed by the conveyor 101 by the label sticking device A2. . In the illustrated case, the label b is affixed to the side surface of the article a.
An article detection unit 104 that detects an article a is disposed on the side of the conveyance table 101 ′ on the article carry-in side.

FIG. 2 is a block diagram showing a configuration of an electric drive unit including a control unit 201 that controls the operation of the label print issuing unit A1 and a label sticking device A2 connected to the control unit 201. Since the mechanical structure of the label print issuing unit A1 is a well-known structure today, the illustration and description are omitted. The control unit 201 is connected to a CPU (Central Processing Unit) 202 and the CPU 202 via a bidirectional bus. This is composed of a ROM 203, a RAM 204, and a display operation unit 205 connected thereto, and switches the inflow of air to an air cylinder that moves the label affixing means in the label printing issuance unit A1 and the label affixing device A2 via the bidirectional bus. One electromagnetic valve driving unit 206, a second electromagnetic valve driving unit 207 that performs switching for generating negative pressure in the label suction holding unit equipped in the label applying means A2 by sucking air, and a label is applied An article detection unit 104 that detects the article a is connected. When the article detection unit 104 detects the article a, the CPU 202 sends a signal to the CPU 202, the CPU 202 outputs a signal to print and issue a label to the label print issuing unit A1, and the label print issuing unit A1 is product information about the article a. Is printed on the label and issued.

A program executed by the CPU 202 is stored in the ROM 203 of the control unit 201. The RAM 204 stores various data necessary for executing the control program. Examples of data stored in the RAM 204 that are related to the present invention include a product file (see FIG. 3) and a label pasting timing file (see FIG. 4).
As shown in FIG. 3, the product file has a product name and a unit price for each product number (product number).

As shown in FIG. 4, the label application timing file includes a conveyor speed (m / s) and a time (s) until the application starts.
The conveyor speed (m / s) indicates the conveying speed of the conveyor 101, which is also the moving speed of the article a.
The time (s) until the start of sticking is the time when the article a is detected by the label sticking device A2 after the article a is detected by the article detection unit 104 provided on the article carry-in side of the transport table 101 ′. For example, if the conveyor speed is V1 (m / s), the label affixing device A2 applies the label b when t1 (s) elapses after the item detection unit 104 detects the item a. Indicates that it will be possible. That is, the operation of the label applying apparatus A2 is started t1 (s) after the article a is detected.

FIG. 5 shows an internal mechanism of the label sticking apparatus A2, and shows a state (standby state at the initial position) where the label b issued by the label print issuing unit A1 is received. Hereinafter, details of the mechanism will be described with reference to the drawings.
In the case 1 formed in a rectangular shape, the first arm 2a and the second arm 2b constituting the link mechanism 2 are arranged substantially in parallel with a predetermined interval in the depth direction of the case. One side of the two arms 2b is pivotally supported by shafts 3 and 3 'installed over the left and right side plates of the case 1.

  The first arm 2a and the second arm 2b constituting the link mechanism 2 are formed to have the same turning radius around the shafts 3 and 3 ′, and the axial end of the first arm 2a (in the drawing, The label attaching means 4 is attached over the sleeve 9 fixed to the axial end of the second arm 2b and the air arm (drive source) over the second arm 2b and the case 1. ) 5 is connected, and a tension spring of the urging means 6 is stretched over a place where the first arm and the second arm are rotationally displaced.

  The first arm 2a has an axial end connected to the label pressing shaft 4a of the label sticking means 4 so as to be rotatable by a shaft 7, and a spring engaging portion 8 is extended and protruded in the opposite direction passing through the shaft 3. The one end 6a of the tension spring of the biasing means 6 is engaged. The distance L1 from the pivot support position 3 of the first arm 2a to the spring engaging portion 8 and the distance L2 from the shaft 3 'to the engaging portion 8' of the tension spring in the second arm 2b described later are L1 < L2 is formed.

In the second arm 2b, a sleeve 9 constituting a sliding portion is rotatably connected to an axial end portion by a shaft 7 ', and the sleeve 9 is slidable on the label pressing shaft 4a of the label sticking means 4. Is fitted. The tip of the rod 5a of the air cylinder 5 is connected by a shaft 10 on the shaft between the shaft 3 'for rotatably supporting the second arm 2b and the sleeve 9, and the urging force is further applied to the shaft 10. The other end 6b of the tension spring of the means 6 is engaged.
The position where the rod 5a of the air cylinder 5 is connected to the second arm 2b by the shaft 10, that is, the tension spring engaging portion 8 'is from the shaft supporting position 3 of the first arm 2a to the spring engaging portion 8 as described above. The distance L2 from the shaft 3 'in the second arm 2b to the engaging portion 8' (shaft 10) of the tension spring is set to be long (L1 <L2). Note that the engaging portion 8 'of the tension spring in the second arm 2b is not limited to the shaft 10 connecting the rod 5a of the air cylinder 5, but an engaging portion may be provided separately. In this case, however, the relationship of L1 <L2 is secured.

  The label sticking means 4 is provided with a label suction holding portion 4b at one end (left end in the drawing) of the label pressing shaft 4a, and attached to the second arm 2b at the other end (right end in the drawing) of the label pressing shaft 4a. A stopper 4c is formed to abut and engage with the axial end of the sleeve 9 (the right end in the drawing). When the air cylinder 5 moves backward (extends), the sleeve 9 of the second arm 2b and the end of the label pressing shaft 4a end. The stopper 4c engages and rotates to move the label sticking means 4 to the initial position. The stopper 4c prevents the sleeve 9 of the second arm 2b sliding on the label pressing shaft 4a from falling off the label pressing shaft 4a.

The label adsorbing / holding portion 4b provided at one end of the label pressing shaft 4a is formed in a hollow disk shape, and a vent hole 11 communicating with the hollow interior is opened on the surface (the surface facing the surface to which the article is attached). Further, the hollow interior is connected to a suction device (not shown) via a tube or the like.
As a result, a suction force is generated in the air holes 11 formed on the surface of the hollow body by operating the suction device, the label b issued from the label print issuing unit A1 can be sucked and held, and the suction of the label can be stopped by stopping the suction. Adsorption is released. Further, the surface of the label adsorbing / holding portion 4b is covered with a cushioning material such as urethane, and when the adsorbed and held label is pressed against the article b, the contact with the article is eased so that the label is not damaged. The opening position of the vent hole 11 is not limited to the illustrated form, and may be opened at the center or the entire surface.

  The air cylinder 5 is a double-acting single rod type air cylinder, a base end side of which is rotatably supported by a shaft 12 extending over the left and right side plates of the case 1, and a rod 5a that expands and contracts by switching air supply / stop. Is connected to the second arm 2b by a shaft 10. The air cylinder 5 is set so that the stroke end state where the rod 5a is extended to the maximum is the initial position of the label applying means 4 (standby position for receiving the issued label). The label sticking means 4 is moved in the direction of sticking the label through the link mechanism 2 and the urging means 6 by a stroke (forward movement).

  The biasing means 6 is constituted by a tension spring, and one end 6a of the tension spring is engaged with the engaging portion 8 of the first arm 2a, and the other end 6b of the tension spring is engaged with the engaging portion 8 'of the second arm 2b. It is attached. The tension spring is stretched to the maximum when the label applying means 4 is located at the initial position, and the tension spring contracts as the label attaching means 4 moves from the initial position in the direction of applying the label. It is stretched.

Next, operation | movement of above-described label sticking apparatus A2 is demonstrated.
FIG. 5 shows a state in which the label sticking means 4 is retracted to the initial position by the air cylinder 6, and this position is a standby position in which the label printed and issued from the label print issuing unit A1 is received and held by the label suction holding unit 4b. is there. In this state, a biasing force is applied to the first arm 2a so as to rotate counterclockwise about the shaft 3 by the tension force of the tension spring (biasing means) 6.

  At the initial position, after the label suction holding unit 4b in the label applying means 4 sucks and holds the label b printed from the label print issuing unit A1, air is supplied to the port 5c of the air cylinder 5 to open the port 5d. As a result, the air cylinder 5 is operated, and the rod 5b strokes in the contraction direction, whereby the second arm 2b is rotated counterclockwise about the shaft 3 '. That is, the sleeve 9 attached to the second arm 2b slides on the label pressing shaft 4a of the label applying means 4 in the left direction in the drawing. As a result, the first arm 2a is rotated counterclockwise by the tension spring 6 about the shaft 3 to move the label applying means 4 in the label applying direction (left direction in the drawing).

  And from the axis | shaft 3 which is the rotation center of the 1st arm 2a, the distance L1 to the engaging part 8 to which the one end 6a of the tension spring 6 is engaged, and from the axis | shaft 3 'which is the rotation center of the 2nd arm 2b. The distance L2 to the engaging portion 8 ′ to which the other end 6b of the tension spring 6 is engaged is set to L1 <L2, and the rod 5a of the air cylinder 5 is further retracted to the contraction end (the label suction holding portion is covered). In this state, the tension spring 6 still retains a tensile force in the state where it is pressed against the sticking surface. Therefore, when the label sticking means 4 moves (forwards) in the direction of sticking the label, the label suction holding part 4b The tension force of the tension spring 6 becomes weaker as it approaches the article a, and the tension force remains in the tension spring 6 even at the contraction end of the air cylinder 5, that is, at the time of labeling. Tension The label urges the label sticking unit 4 to the adhesion surface direction by the force may be affixed to the sticking face. And since the force of the air cylinder 5 does not act directly on the label sticking means 4, the surface to be stuck of the article only needs to be within the range covered by the tension force of the tension spring 6, and the position management of the article can be easily performed. it can.

  When the rod 5a of the air cylinder 5 is stroked in the extending direction to move (return) the label applying means 4 to the initial position, the tension spring 6 is also extended along with the rotation of the second arm 2b. The tensile force is increased, and the stopper 4c is engaged by the movement of the sleeve 9 of the second arm 2b to move the label applying means 4 together. Moreover, since the increasing tension force of the tension spring 6 acts on the label attaching means 4 via the first arm 2a, the label attaching means 4 is smoothly moved with respect to the movement of the sleeve 9.

Next, the state when a label is applied will be described with reference to FIGS.
FIG. 6 shows a label suction holding portion 4b that sucks and holds the label b of the label applying means 4 by the rotation of the second arm 2b by the operation of the air cylinder 5 and the rotation of the first arm 2a by the pulling force of the tension spring 6. The state where the article a is in contact with the surface to be pasted is shown. At this stage, the rod 5a of the air cylinder 5 does not reach the contraction end, and the stroke (length) remains until the contraction end. The force for pressing the holding portion 4b against the surface to be bonded is held by the urging force (tensile force) of the tension spring 6, and the tension spring 6 is still in a state where the tension force remains.

  Accordingly, when the air cylinder 5 is further stroked to the contraction end, the second arm 2b rotates counterclockwise (downward in the drawing) about the shaft 3 'as shown in FIG. The sleeve 9 at the end of the second arm 2b moves to the lower left on an arc centered on the shaft 3 '. Since the label pressing shaft 4a of the label applying means 4 is lowered downward by the movement of the sleeve 9, the label pressing shaft 4a is rotated clockwise around the shaft 7 connected to the first arm 2a. Is rotated. As a result, the label suction holding portion 4b attached to the tip of the label pressing shaft 4a is moved upward on the adherend surface while maintaining the state of being pressed against the adherend surface by the urging force of the tension spring 6 (FIG. 7 solid line state). As a result, the label pressed against the surface to be applied is pressed so that the surface of the applied label is stroked by the clockwise rotation of the label applying means 4 by the last stroke of the air cylinder 5. Therefore, a more reliable application state that cannot be obtained simply by pressing and applying the label is obtained.

  Also, labeling is performed by increasing the turning radius (distance from shaft 3 to shaft 7, distance from shaft 3 'to shaft 7') of the first arm 2a and the second arm 2b constituting the link mechanism 2. The moving stroke of the means 4 becomes long, and conversely, the moving stroke of the label applying means 4 becomes short by shortening the distance. Thereby, the moving stroke of the label sticking means 4 can be easily changed without changing the air cylinder (drive source) 5. The turning radius can be changed by any method such as a method of exchanging with an arm having a different turning radius, or a method of selecting an arbitrary hole from a plurality of pivot positions (holes) formed in a single arm. But you can.

Next, an outline of the control of the label sticking operation will be described based on the flowchart of FIG.
(S101) ... By inputting a product number from the display operation unit 103, setting data such as a product name and a unit price is read from the product file stored in the RAM 204 and set.
(S102) ... It is determined whether or not the article a is detected by the article detection unit 104. If YES, the process proceeds to (S103), and if NO, the process returns to (S101).
(S103)... When the article is detected, the second electromagnetic valve driving unit 207 is operated to generate a suction force in the vent hole 11 formed in the label suction holding unit 4b.
(S104) ... A label printed from the label print issuing unit A1 is issued. The issued label is sucked and held by the suction force generated in the label sucking and holding part 4b of the label sticking apparatus A2 located below the label print issuing part A1.
(S105) ... It is checked whether or not a predetermined time has elapsed since the article detection unit 104 detected the article. If YES, the process proceeds to (S106), and if NO, the check is continued. The label application timing file is referred to determine the time (s) until the application starts corresponding to the current speed of the conveyor 101. That is, it is the time required for the article to move to the application position after the article is detected in (S101), and the label application timing is adjusted.
(S106)... When the sticking start time is reached, the first electromagnetic valve driving unit 206 is operated to move the label sticking means 4 toward the conveyor 101, that is, toward the article a. Thereby, sticking of a label is performed reliably and correctly.
(S107)... The second electromagnetic valve driving unit 207 is operated to stop the suction force generated in the vent hole 11 of the label suction holding unit 4b.
(S108) ... The first electromagnetic valve driving unit 206 is operated to return the label sticking means 4 to the initial position. This completes one cycle for labeling.

FIG. 9 shows a tensioning form of the urging means (tensile spring) 6 according to the present invention and a comparative example in which one end of the urging means (the side corresponding to the engaging portion 8 ′) is engaged with the fixed end. It is the figure which showed the change of the spring force with time progress. In the present invention and the comparative example, the length of the urging means and the distance between the tensions are the same. In the figure, the horizontal axis represents time (t), the vertical axis represents spring force (p), the solid line represents the present invention, and the broken line represents a comparative example. However, the diagram is conceptually shown for easy understanding of the difference between the two.
FIG. 9A shows the change of the biasing means from the extended state to the contraction direction (change of the biasing means when the label sticking means moves in the label sticking direction), and FIG. It is a figure which shows the change (a change of the urging | biasing means when a label sticking means moves to the initial position after label sticking) from a contracted state to an expansion | extension state.
In the diagram of FIG. 9A, it can be seen that the time (t) until the spring force (p) is attenuated to the expected value m is earlier in the present invention. Similarly, in FIG. 9 (b), it can be seen that the time (t) until the spring force (p) generates the expected value n is earlier in the present invention.
That is, the biasing means 6 has a faster time until the spring force reaches the expected value regardless of whether the biasing means 6 changes in the direction of expansion or contraction. As a result, in the apparatus, the spring force can be used after the spring force reaches a predetermined value and becomes stable, so that stable operation of the apparatus can be obtained. It is also possible to increase the speed.

The present invention is not limited to the above-described embodiment, and can be changed without changing the gist of the present invention.
(1) Although the fluid pressure cylinder is used as the driving source for the reciprocating motion of the label attaching means, a pulse motor or the like may be used.
(2) A fan may be used as a method for generating a suction force in the label suction holding portion of the label attaching means.
(3) The biasing means for biasing the label sticking means against the label sticking object is not limited to the tension spring but may be a compression spring.
(4) In the embodiment, a printing unit is provided as a label issuing unit, and a form in which a printed label is attached is shown. However, the label issuing unit does not include a printing unit, and uses a pre-printed label roll, It may be in the form of being released from the mount.
(5) The embodiment has shown a form in which a label is affixed to the side surface of an article (label affixed object), but the label affixing position is not limited to a side surface, and can be any of a bottom surface, an upper surface, or an inclined side surface It is.

The external view which shows embodiment of the label sticking apparatus which concerns on this invention. The block diagram which shows the structure of the control part which controls the action | operation of a label printing issuing part, and the electric drive part of a label sticking apparatus. The block diagram which shows an example of the goods file memorize | stored in a control part. The block diagram which shows an example of the label sticking timing file memorize | stored in a control part. It is the schematic which shows the internal structure of a label sticking apparatus, (a) is a front view, (b) is a side view. The same side view which shows a state when the label adsorption | suction holding | maintenance part of a label sticking means contact | abuts the to-be-pasted surface. The same side view which shows the state when the fluid pressure cylinder act | operates from the state of FIG. 6 to the contraction end. The flowchart figure which shows the outline | summary of control of label sticking operation | movement. The graph which shows the change of the spring force with time passage when the tension spring is stretched between two points to be displaced (the present invention) and when one end of the tension spring is stretched to the fixed end (comparative example).

Explanation of symbols

A2 ... Labeling device 2 ... Link mechanism 2a ... First arm 2b ... Second arm
4 ... Label affixing means 4a ... Label pressing shaft 4b ... Label adsorption holding part 4c ... Stopper
5 ... Fluid pressure cylinder (drive source) 5a ... Rod
6 ... biasing means (tension spring) a ... article (object to be labeled)
b ... Label

Claims (5)

A label affixing device that receives a label issued from a label issuing unit, affixes the label by pressing the received label against a label application object,
A label affixing means provided with a label suction holding part for receiving and holding the label issued from the label issuing part with the glue surface facing outward;
A link mechanism for reciprocating the label attaching means toward a label attaching object;
A drive source for operating the link mechanism;
A biasing means for biasing the label sticking means in a direction in contact with a label sticking object via the link mechanism;
The biasing means is stretched between the rotationally displaced locations in the arm of the link mechanism that is swung by the drive source, and the biasing force is maximum at the initial position of the label sticking means. A label affixing device, wherein the label affixes to a label affixing object by means of the biasing force and decreases as the means moves toward the affixing object. The link mechanism includes a first arm and a second arm having the same turning radius, the biasing means is a tension spring, and the rotating end of the first arm is the length of the label pressing shaft of the label applying means. It is connected in the middle of the direction, and the rotating end of the second arm is slidable on the rear end side from the connecting portion of the first arm in the label pressing shaft and can be engaged with and disengaged from the rear end.
One end of the tension spring is engaged between the rotation center of the second arm and the sliding portion with respect to the label pressing shaft, and the other end of the tension spring is connected to the label pressing shaft from the rotation center of the first arm. The label sticking device according to claim 1, wherein the labeling device is engaged with a projecting end projecting on the side opposite to the coupling unit, and a rod from the driving source is coupled to the second arm.   The distance L1 from the rotation center of the first arm of the tension spring to the engagement portion and the distance L2 from the rotation center of the second arm of the tension spring to the engagement portion satisfy L2> L1. The label affixing device according to claim 2.   The label sticking device according to any one of claims 1 to 3, wherein the first arm and the second arm constituting the link mechanism can change a length of a turning radius.   A fluid pressure cylinder is used as the driving source, and the label suction holding portion of the label sticking means abuts on a label sticking object with a biasing force of the biasing means at a stage before the contraction end of the fluid pressure cylinder. The label sticking device according to any one of claims 2 to 4.

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