CN105819051A - High-speed flexible label dispensing device - Google Patents

Abstract

The invention discloses a high-speed flexible label dispensing device. The high-speed flexible label dispensing device comprises a rack and further comprises a label box mechanism, a label taking mechanism and a label feeding mechanism which are mounted on the rack. The label box mechanism comprises a label box and further comprises a linear guide way, an upper limiting mechanism, lower limiting rods, a label pressing block, a label supporting plate and a blowing spray nozzle which are mounted on the label box. The label taking mechanism comprises a rotary air cylinder, a vacuum sucker and a label taking air cylinder. The label feeding mechanism comprises a label guiding platform and a label push air cylinder. A blowing spray nozzle structure is disposed at a label taking opening of the label box of the label dispensing device, parallel air flow is blown out to destroy vacuum among labels and separate the labels when one of the labels is taken out, and therefore the effect that only one label is taken out during label taking is guaranteed.

Description

A high-speed flexible label delivery device

technical field

The invention belongs to the field of label delivery, and more specifically relates to a high-speed flexible label delivery device that can prevent multiple sheets from being taken.

Background technique

Automatic labeling machines are widely used in grain processing, food, and industrial product packaging. The application of automatic labeling machine has greatly improved the reliability and efficiency of labeling in the packaging process, saving labor costs. Nowadays, manual labeling and semi-automatic labeling have gradually withdrawn from the market, and automatic labeling machines have become mainstream products in the packaging field.

The automatic label feeding label box is an important part of the automatic labeling machine. Its label capacity, replaceability, label delivery speed, label delivery stability and reliability all have an important impact on the performance of the automatic labeling machine. The automatic label feeding label box sends the label to the label taking port, and provides labels for the subsequent processes of label taking, conveying labels and labeling of the automatic labeling machine.

The patent specification with Chinese application number 201410680827.1 discloses a pulley-type label box, which uses a push trolley that slides on two guide rods to push the label, and the guide rod is used for guiding friction. The process of pushing the label is not smooth enough; The push trolley is guided by two guide rods, which is prone to deviation and jamming, and the reliability is not high; if the trolley is installed on the two parallel guide rods without deviation, the assembly process will be complicated; in addition, it cannot be applied to different materials and different sizes. labels, and there is no corresponding mechanism to ensure that only one label is taken for labeling.

Chinese patent application No. 201520538008.3 discloses a label delivery device that relies on a sliding trolley that slides on an inclined surface to push labels. The label pushing trolley of this patent may have different friction forces on the left and right wheels of the trolley due to uneven friction on the slope, and the trolley will not be able to move smoothly during its operation; it also does not have some corresponding mechanisms to ensure that only one label is taken, and it is not applicable. Labels with different materials, different rigidities and different sizes.

Contents of the invention

Aiming at the above defects or improvement needs of the prior art, the present invention provides a high-speed flexible label delivery device. The labels taking and pushing actions of the label delivery device are parallel, which can save time and improve efficiency.

In order to achieve the above object, according to the present invention, a high-speed flexible label delivery device is provided, which is characterized in that it includes a frame and a label box mechanism installed on the frame, a label-taking mechanism and a label-feeding mechanism, wherein,

The label box mechanism includes a label box, and a linear guide rail installed on the label box, an upper limit mechanism, a lower limit rod, a label pressing block, a label support plate and an air blowing nozzle;

The label box is hollow to accommodate labels;

The label support plate is arranged in the label box and is inclined relative to the horizontal plane for supporting the labels in the label box;

The linear guide rail is arranged obliquely relative to the horizontal plane and its inclination angle is consistent with the label support plate;

The label pressing block is installed on the linear guide rail through a slider, so as to move downward by its own gravity, thereby pushing the label in the label box along the longitudinal direction of the linear guide rail to move;

The upper limit mechanism includes a standard bolt screwed on the label box, the standard bolt is arranged horizontally and extends into the label box, and is used to limit the position of the label in the label box;

The lower limit rod is horizontally installed on the label box, it is located obliquely below the index bolt, and the horizontal distance between it and the label pressing block is greater than the level between the index bolt and the label pressing block The space is used to cooperate with the stop bolt to limit the position of the label in the label box, so that the label to be taken away against the lower limit rod and the stop bolt is relatively vertical face tilt;

The blowing nozzle is used to blow a horizontal airflow into the label box to form an airflow between the label abutting on the lower limit rod and the stop bolt and the label adjacent to it, so as to facilitate the separation of the above two labels , so as to facilitate the removal of the label against the lower limit rod and the stop bolt by the external label taking mechanism;

The standard-taking mechanism includes a rotary cylinder, a vacuum suction cup and a standard-taking cylinder, the rotary cylinder is installed on the frame, the standard-taking cylinder is driven to rotate by the rotary cylinder, and the vacuum suction cup is installed on the on the piston rod of the marking cylinder for sucking the label abutting against the lower limit rod and the stop bolt and sending the label to the label feeding mechanism;

The label sending mechanism includes a label guide table and a label push cylinder, and the label guide table is provided with a positioning guide groove for accommodating the labels sent by the vacuum suction cup and limiting the upper and lower ends of the labels sent over, In order to prevent the sent label from falling out, the push cylinder is used to push the label in the positioning guide groove to move horizontally to the set position.

Preferably, the positioning guide groove is trapezoidal, and the side close to the label-taking cylinder is narrower than the side away from the label-taking cylinder, and the height of this side is slightly smaller than the height of the label, so as to prevent the label in the positioning guide groove from falling down out.

Preferably, a limit cylinder is also included, the piston rod of the limit cylinder is arranged horizontally, and the label guide table is fixedly connected to the piston rod of the limit cylinder;

The label guide table includes a U-shaped plate and two limit vertical plates, the opening of the U-shaped plate faces the label-taking cylinder, and each end of the opening side of the U-shaped plate is respectively connected to a limit plate. A position riser, the U-shaped plate and two limit risers jointly form the positioning guide groove;

There is a distance between the two limiting vertical plates and the distance is slightly smaller than the height of the label, so as to prevent the label in the positioning guide groove from falling out;

The two limiting vertical plates cooperate with the closed end of the U-shaped plate to limit the position of the label in the positioning guide groove.

Preferably, a photoelectric switch is also included, which is arranged on the frame to detect the number of labels in the label box and send it to the computer to determine whether the number of labels in the label box is less than the set value.

Preferably, a photoelectric switch is also included, and the photoelectric switch is arranged on the frame to detect whether there is a label moving in the positioning guide groove and send it to the computer, so as to judge whether the label feeding is successful.

Preferably, the label box is detachably mounted on the frame.

Preferably, a positioning bar is installed on the label box, and the positioning bar is installed on the frame through bolts for positioning the label box.

Preferably, a limit switch is installed on the frame to detect whether the label box is installed in place and send it to the computer to control the operation of the label delivery device.

Preferably, the time taken by the vacuum suction cup from sucking the label in the label box to sending it into the label guide table is 2-3 seconds.

Preferably, a spring latch is installed on the frame for fixing the label box on the frame.

Generally speaking, compared with the prior art, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

1) When vacuum suction cups are used to pick up labels, since a vacuum is formed between the stacked labels, it is easy to pick up multiple labels. For this reason, the label box of the label delivery device is equipped with a blowing nozzle structure, which blows out parallel airflow when taking the label, breaks the vacuum between the labels, separates the labels, and ensures that only one label is taken when taking the label; , The lower limit rod and upper limit mechanism on the label box can make the label tilt, and can also ensure that only one label is taken when taking the label.

2) When sending out the label, place the label in a fixed label guide groove, so as to ensure that the sent out label can meet a certain position accuracy, which is especially important in some occasions (such as seam label). Moreover, taking over the label through the label guide groove can reduce the time for the vacuum suction cup to hold the label and improve reliability.

3) There is a low-level photoelectric switch near the label opening of the label box to detect whether the label in the label box is about to run out; a photoelectric switch is installed at the label guide groove to detect whether the label is placed in the label guide groove correctly

4) High efficiency: The label taking and pushing actions of the label delivery device are parallel, which can save time and improve efficiency.

Description of drawings

Fig. 1 is a working principle diagram of the label box of the present invention;

Fig. 2 is a detachable schematic diagram of automatic positioning of the label box in the present invention;

Fig. 3 is a schematic diagram of the detailed structure of the label box in the present invention;

Figure 4-1 is a schematic diagram of the upper limit mechanism installed on the label box in the present invention;

Fig. 4-2 is a schematic structural view of the upper limit mechanism in the present invention;

Figure 5-1 is a schematic diagram of the label pressing block installed on the label box through a spherical buckle in the present invention;

Fig. 5-2 is a schematic structural view of a spherical buckle in the present invention;

Fig. 6-1 is a schematic diagram of the work of the present invention;

Fig. 6-2 is the schematic diagram when taking the mark of the present invention;

Figure 7-1 is a schematic structural view of the present invention;

Fig. 7-2 is a structural schematic diagram of the label guide table in the present invention;

Figure 8-1 is a schematic diagram of the air blowing nozzle installed on the frame in the present invention;

Fig. 8-2 is the structural representation of blowing nozzle among the present invention;

Figure 9-1 is a schematic structural view of the present invention;

Figure 9-2 is a schematic diagram of the present invention when feeding labels into the label guide table;

Fig. 9-3 is a structural schematic diagram of the label guiding platform in the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

Referring to the accompanying drawings, a high-speed flexible label delivery device includes a frame 1000 and a label box mechanism installed on the frame 1000, a label-taking mechanism and a label-feeding mechanism, wherein,

The label box mechanism includes a label box 100, and a linear guide rail installed on the label box 100, an upper limit mechanism, a lower limit lever, a label pressing block, a label support plate and an air blowing nozzle 900;

The label box 100 is hollow for accommodating the label 3;

The label support plate is arranged in the label box 100 and is inclined relative to the horizontal plane for supporting the label 3 in the label box 100;

The linear guide rail is arranged obliquely relative to the horizontal plane and its inclination angle is consistent with the label support plate;

The label pressing block is installed on the linear guide rail through a slider, so as to move downward by its own gravity, thereby pushing the label 3 in the label box 100 to move along the longitudinal direction of the linear guide rail;

The upper limit mechanism includes a standard bolt threaded on the label box 100, the standard bolt is horizontally arranged and extends into the label box 100, and is used to limit the position of the label 3 in the label box 100 ;

The lower limit rod is horizontally installed on the label box 100, and it is located obliquely below the index bolt, and the horizontal distance between it and the label pressing block is greater than that between the index bolt and the label pressing block. The horizontal spacing is used for cooperating with the stop bolt to limit the position of the label in the label box 100, so that the label to be taken away against the lower limit rod and the stop bolt is relatively vertical slant;

The blowing nozzle 900 is used to blow a horizontal airflow into the label box 100 to form an airflow between the label abutting on the lower limit rod and the stopper bolt and the label adjacent to it, thereby facilitating the above two The label is separated, thereby facilitating the external label taking mechanism to take away the label 3 that is against the lower limit rod and the stop bolt;

The standard-taking mechanism includes a rotary cylinder 500, a vacuum chuck 300, and a standard-taking cylinder 400. The rotary cylinder 500 is installed on the frame 1000, and the standard-taking cylinder 400 is driven to rotate by the rotary cylinder 500. The vacuum suction cup 300 is installed on the piston rod of the standard-taking cylinder 400 for sucking the label 3 against the lower limit rod and the index bolt and sending the label 3 to the label-feeding mechanism;

The label delivery mechanism includes a label guide table 700 and a label push cylinder 800. The label guide table 700 is provided with a positioning guide groove 1200 for accommodating the labels 3 sent by the vacuum chuck 300 and limiting the labels 3 sent over. The upper and lower ends of the label 3 are used to prevent the delivered label 3 from tilting and falling out. The label pushing cylinder 800 is used to push the label 3 in the positioning guide groove 1200 to move horizontally to a set position.

Further, the positioning guide groove 1200 is trapezoidal, and the side close to the label-taking cylinder 400 is narrower than the side away from the label-taking cylinder 400, and the height of this side is slightly smaller than the height of the label 3, so as to prevent the positioning guide groove 1200 from Label 3 falls out askew.

Further, it also includes a limit cylinder 1300, the piston rod of the limit cylinder 1300 is arranged horizontally, and the label guide table 700 is fixedly connected to the piston rod of the limit cylinder 1300;

The label guide table 700 includes a U-shaped plate and two limit vertical plates, the opening of the U-shaped plate faces the label-taking cylinder 400, and each end of the opening side of the U-shaped plate is respectively connected to a The spacer vertical plate, the U-shaped plate and the two spacer vertical plates jointly form the positioning guide groove 1200;

There is a distance between the two limiting vertical plates and the distance is slightly smaller than the height of the label 3, so as to prevent the label 3 in the positioning guide groove 1200 from falling out;

The two limiting vertical plates cooperate with the label positioning reference plate to limit the position of the label 3 in the positioning guide groove 1200 .

Further, it also includes a photoelectric switch, which is arranged on the frame 1000 to detect the number of labels in the label box 100 and send it to the computer to determine whether the labels 3 in the label box 100 have been taken out .

Further, another photoelectric switch is included, and the photoelectric switch is arranged on the frame 1000 to detect whether there is a label 3 moving in the positioning guide groove 1200 and send it to the computer, so as to judge whether the label delivery is successful.

Further, the label box 100 is detachably installed on the frame 1000 .

Further, a positioning bar is installed on the label box 100, and the positioning bar is used for positioning the label box. In addition, there are spring-loaded latches mounted on the frame to secure the label cassettes.

Further, a limit switch 1100 is set on the frame. The limit switch 1100 is used to detect whether the label box 100 is installed in place and send it to the computer for controlling the operation of the label delivery device.

The automatic label delivery label box 100 of the present invention that can be loaded with labels offline has a large capacity, and can be loaded with labels offline when the labels are used up, relying on the interchangeability of multiple label boxes 100, which improves the efficiency of labeling; the label delivery process of the present invention The label pressing block sliding on the high-precision linear guide rail is driven by gravity without additional power; the arrangement of the upper and lower limit mechanisms and the blowing nozzle 900 can ensure that only one label 3 is taken; in addition, through the upper limit mechanism The adjustment can adapt to labels of different sizes.

The schematic diagram of the label delivery device is shown in Figure 6-1. The label delivery device is composed of a label box 100, a vacuum chuck 300, a standard cylinder 400, a rotary cylinder 500, a photoelectric switch 600, a label guide table 700, a standard cylinder 800 and an air blowing nozzle 900. When the label delivery device is working, the label box 100 sends the label 3 to the label taking port, and the label taking cylinder 400 pushes the vacuum suction cup 300 to move towards the label 3. The air nozzle 900 blows out a parallel airflow to separate the label 3 to be taken from the rest of the labels 3, and the label is automatically adsorbed to the vacuum chuck 300. Under the action of the parallel airflow blown out by the air blowing nozzle, only one label 3 can be taken (combined below) Figure 3 for details). The label-taking cylinder 400 retracts after taking the label 3, the rotating cylinder 500 drives the label-taking cylinder 400 to rotate 90 degrees, then the label-taking cylinder 400 is pushed out, and the label 3 is sent to the label guide table 700, and finally the label pushing cylinder 800 pushes the label 3 Push in the sewing machine feed mechanism from the label guide table 700. The above process is implemented cyclically to realize the full automation of the labeling process. The photoelectric switch 600 at the label taking port of the label box is used to detect whether the label 3 in the label box 100 is about to be used up; the photoelectric switch 600 at the rear end of the label guide table 700 is used to detect whether the label 3 is correctly placed in the label guide table to ensure successful label delivery . In addition, after the label taking cylinder sends the label 3 into the label guide table and retracts, when the label pushing cylinder pushes the label, the label taking cylinder takes the label 3 again, and the two work in parallel, which greatly improves the efficiency of label placement.

The detailed structure of the label delivery device is shown in Figure 7-1. The whole device can be divided into a label box mechanism, a label taking mechanism, a label sending mechanism and a photoelectric switch.

The label box mechanism is positioned by a positioning bar and fixed on the frame with a spring bolt, and includes a label box, an air blowing nozzle and a limit switch. The limit switch is installed at the back end of the label box to detect whether the label box is installed in place. If it is not installed in place, the limit switch pops up and the device stops working; the blowing nozzle is installed at the label taking port of the label box.

The standard-taking mechanism includes a vacuum suction cup, a standard-taking cylinder and a rotating cylinder. The vacuum suction cup is installed on the piston rod of the standard-taking cylinder, and the standard-taking cylinder is installed on the rotating cylinder, and the whole mechanism is fixed on the frame by bolts.

The label feeding mechanism includes a label guide table and a label pushing cylinder. Both are installed on the frame, the upper and lower ends of the label guide table are at an angle of 30 degrees, the middle is hollowed out, and the label taking cylinder pushes the label 3 into the two angles of the label guide table, and the height of the notch of the label guide table is less than Label 3 height, so label 3 will not pour out of the label guide table. The piston rod of the label pushing cylinder moves in the middle of the label guide table, and pushes the label 3 to the feed mechanism of the sewing machine.

The detection device adopts two photoelectric switches, and the two photoelectric switches are installed on the frame through the mounting base. One of the photoelectric switches is installed at the label opening of the label box as a low position detection switch of the label box; the other photoelectric switch is installed next to the rear end of the label guide table to detect whether the label is correctly placed in the label guide table.

Through the technical solution described above, full automation of label delivery can be realized. The setting of the label guide table can reduce the time for the vacuum suction cup to hold the label 3, improve reliability, and ensure that the label 3 is placed at the designated position each time, meeting a certain position accuracy; the label taking mechanism and the label delivery mechanism can work in parallel, saving time ,Improve efficiency. The whole device is reasonably arranged, compact in structure and easy to install.

Figure 8-1 is a schematic diagram of the position of the blowing nozzle. There is a notch on the side plate of the label box where the label is taken. The blowing nozzle is installed next to the notch. When the vacuum suction cup sucks the label, the airflow is blown out, and the label to be taken is separated from the rest of the labels to ensure that the vacuum suction cup only takes one label 3. If you want to blow air to separate the label to be taken from the rest of the labels, there are requirements for the direction of the blown airflow. If the blowing nozzle is made into the shape of a bell mouth, what is blown out will be a diffused airflow in the shape of a bell mouth, so that not only the labels 3 cannot be separated, but the airflow will give the labels 3 oblique pressure, making it difficult to take out the labels or take out multiple labels 3. To separate the label 3, the air blowing nozzle needs to blow parallel airflow in the direction perpendicular to the side of the label 3. The structure of the blowing nozzle, the blowing port is processed into two rows of parallel small holes, and the diameter of the small holes is 1mm, so that the blown airflow can almost be regarded as a parallel airflow, and according to the actual test, it can meet the requirements.

For the label guide table provided by the above technical solution, although the label 3 will not be poured out from the label guide table, since the guide groove has a certain space, the label 3 will be inclined in the guide groove, so the position accuracy of the label sent out is not high. For this reason, on the basis of the above scheme, a label guiding platform mechanism is added, and the detailed structure of the entire device is shown in Figure 9-1. The working principle of the label guide table mechanism is shown in Figure 9-1. The label guide table is driven by a limit cylinder installed on the frame. The structure of the label guide table is shown in Figure 9-3. It is hollow in the middle and narrowed at the notch. The label guide platform passes through the middle, and the part covered by the label guide platform has no bent angle and is a flat plate.

The working principle of the label guide table is shown in Figure 9-2. The label taking mechanism pushes the label 3 into the label guide table, and then the limit cylinder shrinks to pull the label guide table back, so that the label 3 is stuck in the label guide table, so that the label 3 can be kept upright and the position accuracy of the label delivery is improved.

It is easy for those skilled in the art to understand that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, All should be included within the protection scope of the present invention.

It is easy for those skilled in the art to understand that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, All should be included within the protection scope of the present invention.

Claims (10)

1. A high-speed flexible label delivery device is characterized in that it includes a frame and a label box mechanism installed on the frame, a label-taking mechanism and a label-delivering mechanism, wherein, The label box mechanism includes a label box, and a linear guide rail installed on the label box, an upper limit mechanism, a lower limit rod, a label pressing block, a label support plate and an air blowing nozzle; The label box is hollow to accommodate labels; The label support plate is arranged in the label box and is inclined relative to the horizontal plane for supporting the labels in the label box; The linear guide rail is arranged obliquely relative to the horizontal plane and its inclination angle is consistent with the label support plate; The label pressing block is installed on the linear guide rail through a slider, so as to move downward by its own gravity, thereby pushing the label in the label box along the longitudinal direction of the linear guide rail to move; The upper limit mechanism includes a standard bolt screwed on the label box, the standard bolt is arranged horizontally and extends into the label box, and is used to limit the position of the label in the label box; The lower limit rod is horizontally installed on the label box, it is located obliquely below the index bolt, and the horizontal distance between it and the label pressing block is greater than the level between the index bolt and the label pressing block The space is used to cooperate with the stop bolt to limit the position of the label in the label box, so that the label to be taken away against the lower limit rod and the stop bolt is relatively vertical face tilt; The blowing nozzle is used to blow a horizontal airflow into the label box to form an airflow between the label abutting on the lower limit rod and the stop bolt and the label adjacent to it, so as to facilitate the separation of the above two labels , so as to facilitate the removal of the label against the lower limit rod and the stop bolt by the external label taking mechanism; The standard-taking mechanism includes a rotary cylinder, a vacuum suction cup and a standard-taking cylinder, the rotary cylinder is installed on the frame, the standard-taking cylinder is driven to rotate by the rotary cylinder, and the vacuum suction cup is installed on the on the piston rod of the marking cylinder for sucking the label abutting against the lower limit rod and the stop bolt and sending the label to the label feeding mechanism; The label sending mechanism includes a label guide table and a label push cylinder, and the label guide table is provided with a positioning guide groove for accommodating the labels sent by the vacuum suction cup and limiting the upper and lower ends of the labels sent over, In order to prevent the sent label from falling out, the push cylinder is used to push the label in the positioning guide groove to move horizontally to the set position. 2. A high-speed flexible label delivery device according to claim 1, wherein the positioning guide groove is trapezoidal, and the side close to the label-taking cylinder is narrower than the side away from the label-taking cylinder, and the side of this side The height is slightly smaller than the height of the label, so as to prevent the label in the positioning guide groove from falling out. 3. A high-speed flexible label dispensing device according to claim 1, further comprising a limit cylinder, the piston rod of the limit cylinder is arranged horizontally, and the label guide table is fixedly connected to the position limit on the piston rod of the cylinder; The label guide table includes a U-shaped plate and two limit vertical plates, the opening of the U-shaped plate faces the label-taking cylinder, and each end of the opening side of the U-shaped plate is respectively connected to a limit plate. A position riser, the U-shaped plate and two limit risers jointly form the positioning guide groove; There is a distance between the two limiting vertical plates and the distance is slightly smaller than the height of the label, so as to prevent the label in the positioning guide groove from falling out; The two limiting vertical plates cooperate with the closed end of the U-shaped plate to limit the position of the label in the positioning guide groove. 4. A high-speed flexible label delivery device according to claim 1, further comprising a photoelectric switch arranged on the frame for detecting the number of labels in the label box and sending it to the computer , to judge whether the labels in the label box are less than the set value. 5. A high-speed flexible label delivery device according to claim 1, further comprising a photoelectric switch, the photoelectric switch is arranged on the frame to detect whether there is label movement in the positioning guide groove And send it to the computer to judge whether the bid delivery is successful. 6. A high-speed flexible label delivery device according to claim 1, wherein the label box is detachably mounted on the frame. 7. A high-speed flexible label delivery device according to claim 1, wherein a positioning bar is installed on the label box, and the positioning bar is installed on the frame by bolts for positioning the label box . 8. A high-speed flexible label delivery device according to claim 1, wherein a limit switch is installed on the frame to detect whether the label box is installed in place and send it to the computer for controlling the Describe the operation of the label dispenser. 9 . The high-speed flexible label dispensing device according to claim 1 , wherein the time from when the vacuum suction cup sucks the label in the label box to when it is sent into the label guide table is 2 to 3 seconds. 10 . The high-speed flexible label delivery device according to claim 1 , wherein a spring latch is installed on the frame for fixing the label box on the frame. 11 .