A rotary glass plate feeding mechanism

Abstract

The present invention relates to a sheet feeding device, and provides a rotary glass sheet feeding mechanism, comprising: a support frame with connection holes; a motor installed at the lower part of the support frame; a transmission shaft, one end of which is rotatably arranged on the support frame; the motor drives the transmission shaft to rotate through a pulley group; a hexagonal plate fixedly arranged on one side of the transmission shaft and located on the side close to the pulley group; a connecting plate, which and a positioning plate are connected to each other around the six sides of the hexagonal plate to form a hexagonal frame and are installed on the hexagonal plate, wherein the positioning plates are symmetrically arranged on the hexagonal plate; a support plate arranged on both sides of the positioning plate and connected to the transmission shaft, and the support plate provides support for the connecting plate. In the present invention, the glass sheet covered with the film material is wound on the hexagonal frame, and the hexagonal frame rotates to send out the wound glass sheet, and the glass sheet is always kept in a flat state when being sent out and is fed onto the roller, so as to prevent the glass sheet from being broken or falling off from the film material due to excessive turning angle.

Description

Technical Field

[0001] The invention relates to a plate material feeding device, in particular to a rotary glass plate material feeding mechanism. Background Art

[0002] Glass accessories are commonly used in 3C digital products. When producing glass accessories, the glass is first cut into rectangular glass plates of equal size to facilitate processing and transportation. In order to protect the glass plates from damage and contamination during the production process, protective measures are usually taken on the glass plates. Figure 1 As shown, the protective measure taken for the glass plate is to cover both sides with film materials. Different from the ordinary lamination method, the two film materials are divided into a bottom film and a top film. Multiple glass plates are evenly spaced and pasted on the bottom film, and the side of the glass plate that needs to be processed is covered with the top film. When the glass plate is processed and tested, it is only necessary to peel off the top film to expose the processed surface of the glass plate.

[0003] When using processing equipment containing rollers to transport glass plates, since multiple glass plates are on the same film, when the glass plates are inserted into the rollers for transportation with the film material as a carrier, the glass plates and the film material that have not entered the rollers must be pulled up and kept flush with the rollers. Otherwise, when the rollers extract the film material and the glass plates, the glass plates in the hanging part will break or fall off the film material due to the large flipping angle when they encounter the rollers at the entrance; and in the process of winding and collecting the glass plates at the exit, the glass plates need to be accurately aligned. If the glass plates are misaligned and wound, it is very easy to cause the glass plates to break. Summary of the invention

[0004] The present invention aims to solve the technical problems existing in the above-mentioned prior art. To this end, the present invention provides a rotary glass sheet material feeding mechanism.

[0005] To achieve the above-mentioned purpose, the present invention provides a rotary glass plate feeding mechanism, comprising: a support frame with a connecting hole; a motor, installed at the lower part of the support frame; a transmission shaft, one end of which is rotatably arranged on the support frame; the motor drives the transmission shaft to rotate through a pulley group; a hexagonal plate, fixedly arranged on one side of the transmission shaft and located on the side close to the pulley group; a connecting plate, which and a positioning plate are connected to each other around the six sides of the hexagonal plate to form a hexagonal frame and installed on the hexagonal plate, wherein the positioning plate is symmetrically arranged on the hexagonal plate, and the connecting plates are distributed on both sides of the positioning plate; support plates, which are arranged on both sides of the positioning plate and connected to the transmission shaft, and the support plates provide support for the connecting plates; the coated glass plate is wound on the hexagonal frame by matching and aligning the edge faces of the hexagonal frame, and the top height of the hexagonal frame is installed to match the height of the equipment feed port.

[0006] As a further improvement of the solution, it further includes: a hinge, the positioning plate and the connecting plate are connected end to end through the hinge, and the positioning plate is slidably connected to the side wall of the hexagonal plate; slider positioning members, symmetrically arranged on both sides of the transmission shaft, both ends of the support plate are respectively hinged to the slider positioning members and the positioning plate, and the transmission shaft is a multi-prismatic body; after the slider positioning members slide close to each other on the transmission shaft, the hexagonal frame folds into a flat state due to the sliding connection between the positioning plate and the hexagonal plate relying on the hinge.

[0007] As a further improvement of the solution, it further includes: a partition, installed on any one of the connecting plates; an inner concave layer allowing a glass plate to be inserted is provided between the partition and the connecting plate.

[0008] As a further improvement of the solution, it further includes: positioning pins, there are multiple of them, pop-up arranged on the hexagonal plate, holes matching the positioning pins are opened on the connecting plate, and after the positioning pins are disengaged from the holes on the connecting plate, the hexagonal frame can be folded.

[0009] As a further improvement of the solution, it further includes: a curved surface support plate, arranged at the top of the support frame flush with the top of the hexagonal frame.

[0010] As a further improvement of the solution, the positioning plate includes: a moving plate and a fixed plate that are slidably connected to each other, the fixed plate is hinged to the support plate; an elastic band, both ends of which are respectively connected to the moving plate and the fixed plate, the elastic band pulls the moving plate and the fixed plate closer to each other; a check tooth, arranged on the moving plate; a spring piece, arranged on the fixed plate; a reverse tooth, installed on the spring piece; when the reverse tooth abuts against the check tooth, it can prevent the moving plate and the fixed plate from approaching each other.

[0011] As a further improvement of the solution, it further includes: guide sliding rods, evenly spaced and installed on the moving plate and slidably connected to the fixed plate.

[0012] As a further improvement of the solution, the slider positioning member includes: a sliding block, slidably arranged on both sides of the transmission shaft, the support plate is hinged to the sliding block; a positioning top bead, an installation hole penetrating in the direction towards the transmission shaft is provided on the side wall of the sliding block, the positioning top bead is movably arranged in the sliding block; a spring, arranged in the installation hole to press the positioning top bead; positioning holes matching the positioning top beads are spaced on the transmission shaft.

[0013] As a further improvement of the solution, it further includes: a screw, screwed on the installation hole, and the end of the screw abuts against the spring for adjusting the pressure exerted by the spring on the positioning top bead.

[0014] As a further improvement of the solution, it also includes: a limit plate installed on the sliding block, and the support plate is flipped and unfolded to a straight state at a hinge point on the sliding block and is supported by the limit plate and no longer flipped.

[0015] The present invention brings the following effects:

[0016] 1. The present invention winds the glass plates covered with the film material on a hexagonal frame, and each glass plate is fitted with the edge surface of the hexagonal frame, so that the glass plates will not be interlaced and pressed against each other to cause the glass plates to break during the winding process; when the glass plates are conveyed by rollers, the hexagonal frame rotates to send out the wound glass plates, and when the glass plates are sent out, they are always kept in a straight state and sent to the rollers one by one, so as to prevent the glass plates from breaking or falling off the film material due to excessive flipping angle when encountering the roller entrance.

[0017] 2. The positioning plate and the connecting plate are connected by hinges so that the hexagonal frame can be folded to a flat state. When the rolled-up glass plate needs to be put on the hexagonal frame, the flat hexagonal frame can be put in better. The partition provided can provide a simple limiting measure when the hexagonal frame needs to roll up the glass plate, so as to prevent the hexagonal frame from being unable to be fixed when rotating and rolling the glass plate covered with the film material.

[0018] 3. The curved support plate provided by the present invention can provide a bottoming effect for the moving glass plate during the rotation of the hexagonal frame, thereby preventing the glass plate from sagging between the hexagonal frame and the roller frame. Setting the positioning plate to a retractable state can achieve the adjustable size of the hexagonal frame. The reduced hexagonal frame is more conducive to putting on the wound glass plate, and the glass plate wound on the hexagonal frame can also be removed better.

[0019] 4. When the positioning bead on the slider positioning piece and the positioning hole on the transmission shaft cooperate with each other, the slider positioning piece can remain stationary in a fixed position. The slider positioning piece can only be pushed when a vertical lateral external force is applied, thereby ensuring that the slider positioning piece will not slide easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a glass plate and a film material in the prior art.

[0021] Figure 2 It is a complete schematic diagram of the present invention.

[0022] Figure 3 It is another perspective schematic diagram of the present invention.

[0023] Figure 4 The schematic diagram of the support frame and the motor is hidden for the present invention.

[0024] Figure 5 Schematic diagram of the folded state of the present invention.

[0025] Figure 6 Exploded view of the drive shaft, hexagonal plate, connecting plate, positioning plate and support plate of the present invention.

[0026] Figure 7 Detailed structural schematic diagram of the support plate of the present invention.

[0027] Figure 8 For the present invention Figure 7 Partial schematic diagram.

[0028] Figure 9 Cross-sectional view of the slider positioning member of the present invention.

[0029] Figure 10 Schematic diagram of the limit plate and the support plate of the present invention.

[0030] Among them, the corresponding relationship between the reference numerals in the drawings and the names of the components is as follows: 500 - film material, 501 - glass plate, 1 - support frame, 101 - curved support plate, 2 - motor, 3 - drive shaft, 4 - hexagonal plate, 5 - connecting plate, 51 - hinge, 6 - positioning plate, 7 - support plate, 8 - slider positioning member, 9 - partition plate, 91 - concave layer, 401 - positioning pin, 61 - moving plate, 62 - fixed plate, 63 - guiding slide bar, 64 - elastic band, 65 - check tooth, 66 - elastic piece, 67 - reverse tooth, 81 - sliding block, 82 - positioning top bead, 821 - mounting hole, 83 - spring, 84 - screw, 85 - limit plate, 86 - positioning hole. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. In addition, it should be noted that for the convenience of description, only the parts related to the present application rather than all the structures are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0033] The present invention specifically discloses a rotary glass sheet material feeding mechanism, such as Figures 2 - 10 As shown, it includes: a support frame 1 with a connecting hole, when in use, the support frame 1 is fixedly installed on the side wall of the equipment by bolts, the top of the support frame 1 is aligned with the roller for conveying the glass plate 501, a motor 2 is fixedly installed at the lower part of the support frame 1, a transmission shaft 3 is rotatably connected to the support frame 1, only one end of the transmission shaft 3 is rotatably connected to the support frame 1, the motor 2 drives the transmission shaft 3 to rotate through a pulley group, a hexagonal plate 4 is fixedly installed on the transmission shaft 3 near the pulley group, the hexagonal plate 4 rotates with the transmission shaft 3, and connecting rods are installed on the six edges of the hexagonal plate 4 The connecting plates 5 and the positioning plates 6 are connected to each other around the six sides of the hexagonal plate 4 to form a hexagonal frame. Specifically, there are four connecting plates 5 and two positioning plates 6, wherein the positions of the positioning plates 6 are symmetrically arranged on the hexagonal plate 4, and the connecting plates 5 are distributed on both sides of the positioning plates 6. The hexagonal frame formed by the positioning plates 6 and the connecting plates 5 lacks stable support, so support plates 7 are installed on both sides of the positioning plates 6, and the support plates 7 are connected to the transmission shaft 3, so as to provide support for the connecting plates 5 through the support plates 7, so that the hexagonal frame will not be deformed during use.

[0034] When in use, the support frame 1 can be installed at both the inlet and the outlet of the equipment, and the glass plate 501 covered with the film material 500 is wound on the hexagonal frame. At this time, the glass plate 501 is wound on the hexagonal frame by matching and aligning the edge surfaces of the hexagonal frame, so that each glass plate 501 can be tightly attached to the surface of the hexagonal frame. When the support frame 1 is installed, the top height of the hexagonal frame needs to match the height of the inlet and outlet of the equipment. When the glass plate 501 is fed toward the entrance of the equipment through the hexagonal frame, the hexagonal frame rotates to release the wound glass plates 501 one by one. During this process, the glass plates 501 remain straight, so as to prevent the glass plates 501 from breaking or falling off the film material 500 due to excessive flipping angle when encountering the roller entrance. When the glass plates 501 need to be wound, the glass plates 501 are attached to the edge surfaces of the hexagonal frame one by one, so that the glass plates 501 will not be interlaced and pressed against each other during the winding process, causing the glass plates 501 to break. The wound glass plates 501 can be pulled out from the side of the hexagonal frame where the hexagonal plates 4 are not installed.

[0035] according to Figure 5 and Figure 6As shown, the positioning plate 6 and the connecting plate 5 are connected to each other end to end by hinges 51, so that the hexagonal frame formed by the positioning plate 6 and the connecting plate 5 is a movable structure that can be folded and retracted, wherein the positioning plate 6 is slidably connected to the side wall of the hexagonal plate 4. When the two positioning plates 6 slide close to each other along the side wall of the hexagonal plate 4, the hexagonal frame will be flat. However, since the positioning plate 6 is supported by the support plate 7, a slider positioning member 8 is slidably provided on the transmission shaft 3. The transmission shaft 3 is a polygonal column. In this way, the slider positioning member 8 will not rotate on the transmission shaft 3, and the support plate 7 is divided into two sections and connected to the positioning plate 6. Specifically, both sides of the two positioning plates 6 are connected to the support plate 7 by hinges 51, and the ends of the support plates 7 are hinged to the slider positioning member 8. According to Figure 4 As shown, when the support plate 7 connected to the slider positioning member 8 is kept in a straight line, the hexagonal frame is in a fully expanded state; Figure 5 As shown, when the two slider positioning members 8 slide close to each other, the support plate 7 tilts and the top moves downward, the two positioning plates 6 slide on the hexagonal plate 4 and approach each other, and then the hexagonal frame as a whole becomes flat.

[0036] When the hexagonal frame is in a flat state, due to the changes in the angles of multiple edges and corners, the wound glass plate 501 can be better put on the hexagonal frame. After the glass plate 501 is put on the hexagonal frame, the slider positioning parts 8 move away from each other, and the two support plates 7 stand up again and keep in a straight line, so as to open the hexagonal frame.

[0037] according to Figure 5 and Figure 6 As shown, a partition plate 9 is fixedly installed on any one of the connecting plates 5, and an inner concave layer 91 allowing a glass plate 501 to be inserted is provided between the partition plate 9 and the connecting plate 5, and a notch is provided on the side to allow the glass plate 501 to slide out. When the glass plate 501 needs to be wound through the hexagonal frame, in order to prevent the glass plate 501 from falling off the hexagonal frame at the beginning of the rotation of the hexagonal frame, the glass plate 501 covered with the film material 500 coming out of the outlet needs to be inserted into the inner concave layer 91 together with the film material 500, so that the glass plate 501 will not fall off easily during the rotation of the hexagonal frame. When the winding is completed, the glass plate 501 can be pulled out of the hexagonal frame, and the glass plate 501 inserted into the inner concave layer 91 can also come out through the notch.

[0038] according to Figure 6As shown, a plurality of positioning pins 401 are popped up on the hexagonal plate 4, and the positioning pins 401 are kept in a pop-up state by springs 83. Holes matching the positioning pins 401 are opened on the connecting plate 5. The function of the positioning pins 401 is that when the hexagonal frame is in the unfolded state, the positioning pins 401 and the holes are aligned, so that the connecting plate 5 movably connected by the hinges 51 will not slide easily. When the hexagonal frame needs to be folded, it is only necessary to apply a thrust from the side surface of the connecting plate 5. The lateral thrust will cause the connecting plate 5 and the positioning pins 401 to break contact, and then the hexagonal frame can be folded.

[0039] according to Figure 2 and Figure 3 As shown, a curved support plate 101 flush with the top of the hexagonal frame is fixedly installed on the top of the support frame 1, and the pulled-out film material 500 and glass plate 501 are placed on the curved support plate 101, so that the glass plate 501 at the distance from the hexagonal frame to the roller is supported by the curved support plate 101 and will not sag.

[0040] according to Figures 6 - 8 As shown, the positioning plate 6 includes: a movable plate 61 and a fixed plate 62 which are slidably connected to each other, the fixed plate 62 is hinged to the support plate 7, the movable plate 61 and the fixed plate 62 are pulled and connected by an elastic band 64 to keep them close to each other, a check tooth 65 is provided on the movable plate 61, a spring sheet 66 is provided on the fixed plate 62, a reverse tooth 67 is fixedly mounted on the spring sheet 66, and the reverse tooth 67 abuts against the check tooth 65 to prevent the movable plate 61 and the fixed plate 62 from approaching each other. Thereby, the positioning plate 6 becomes a retractable structure, the purpose of which is to adjust the size of the hexagonal frame. When the glass plate 501 is wound on the hexagonal frame, it is difficult to pull the glass plate 501 out of the hexagonal frame. At this time, the reverse tooth 67 can be pushed away from the check tooth 65, and after the top plate and the movable plate 61 are close to each other, the hexagonal frame is reduced, and then the glass plate 501 can be easily removed from the hexagonal frame; similarly, when the glass plate 501 needs to be put on the hexagonal frame, it can also be easily put on by reducing the hexagonal frame.

[0041] according to Figures 6 - 8 As shown, guide slide bars 63 are evenly spaced and fixedly installed on the movable plate 61, and the guide slide bars 63 are slidably connected to the fixed plate 62. Through the guide slide bars 63, the sliding between the movable plate 61 and the top plate will be more stable due to the guidance of the guide slide bars 63.

[0042] according to Figure 6 , Figure 9 and Figure 10As shown, the slider positioning member 8 includes: a sliding block 81 slidably arranged on both sides of the transmission shaft 3, a support plate 7 and the sliding block 81 are hinged, a mounting hole 821 penetrating toward the transmission shaft 3 is opened on the side wall of the sliding block 81, a positioning top bead 82 and a spring 83 are movably arranged in the mounting hole 821 in sequence, the end of the positioning top bead 82 passes through the mounting hole 821 and abuts against the transmission shaft 3, and a positioning hole 86 matching the positioning top bead 82 is arranged on the transmission shaft 3 at intervals, and the spring 83 supports the positioning top bead 82. Specifically, when the sliding block 81 needs to slide on the transmission shaft 3, a thrust perpendicular to the sliding block 81 needs to be applied from the side, so as to make the positioning top bead 82 disengage from the mounting hole 821, so that the sliding block 81 can slide, and the purpose of such a setting is that the sliding block 81 will not slide easily on the transmission shaft 3, so that the support plate 7 supporting the hexagonal frame to maintain the open state will not tilt.

[0043] according to Figure 6 , Figure 9 and Figure 10 As shown, it includes a screw 84 screwed into the mounting hole 821, and the end of the screw 84 abuts against the spring 83 to adjust the pressure applied by the spring 83 to the positioning top bead 82. The spring 83 is compressed by rotating the screw 84. The greater the force applied by the spring 83 to the positioning top bead 82, the more difficult it is for the positioning top bead 82 to disengage from the positioning hole 86.

[0044] according to Figure 6 , Figure 9 and Figure 10 As shown, the limit plate 85 is fixedly installed on the sliding block 81. After the support plate 7 is flipped and unfolded to a straight state at the hinge point on the sliding block 81, it is supported by the limit plate 85 and no longer flipped. This can ensure that the sliding block 81 cannot continue to slide after sliding to the specified position, and the sliding block 81 can stop sliding after the support plate 7 is in a straight line.

[0045] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A rotary glass sheet material feeding mechanism, comprising: A support frame (1) with a connection hole; The motor (2) is installed at the lower part of the support frame (1); it is characterized in that it also includes: a transmission shaft (3), one end of which is rotatably arranged on the support frame (1); the motor (2) drives the transmission shaft (3) to rotate through a pulley group; a hexagonal plate (4) is fixedly arranged on one side of the transmission shaft (3) and is located on the side close to the pulley group; a connecting plate (5) and a positioning plate (6) are connected to each other around the six sides of the hexagonal plate (4) to form a hexagonal frame and are installed on the hexagonal plate (4), wherein the positioning plate (6) is symmetrically arranged on the hexagonal plate (4), and the connecting plates (5) are distributed on both sides of the positioning plate (6); a support plate (7) is arranged on both sides of the positioning plate (6) and connected to the transmission shaft (3), and the support plate (7) provides support for the connecting plate (5); the coated glass plate (501) is wound on the hexagonal frame by matching and aligning the edge faces of the hexagonal frame, and the top height of the hexagonal frame is installed to match the height of the equipment feed port; The positioning plate (6) comprises: a movable plate (61) and a fixed plate (62) which are slidably connected to each other, and the fixed plate (62) is hinged to the support plate (7); an elastic belt (64), the two ends of which are respectively connected to the movable plate (61) and the fixed plate (62), and the elastic belt (64) pulls the movable plate (61) and the fixed plate (62) closer to each other; a non-return tooth (65) provided on the movable plate (61); a spring sheet (66) provided on the fixed plate (62); and a reverse tooth (67) installed on the spring sheet (66); the reverse tooth (67) abuts against the non-return tooth (65) to prevent the movable plate (61) and the fixed plate (62) from approaching each other.

2. The rotary glass sheet material feeding mechanism according to claim 1, characterized in that: Also includes: The hinge (51) is used for the positioning plate (6) and the connecting plate (5) to be connected to each other end to end by the hinge (51), and the positioning plate (6) is slidably connected to the side wall of the hexagonal plate (4); the slider positioning member (8) is symmetrically arranged on both sides of the transmission shaft (3), and the two ends of the support plate (7) are respectively hinged to the slider positioning member (8) and the positioning plate (6), and the transmission shaft (3) is a multi-prism; after the slider positioning members (8) slide close to each other on the transmission shaft (3), the hexagonal frame is folded into a flat state due to the existence of the hinge (51) and the sliding connection between the positioning plate (6) and the hexagonal plate (4).

3. The rotary glass sheet material feeding mechanism according to claim 2, characterized in that: Also includes: The partition plate (9) is installed on any one of the connecting plates (5); an inner concave layer (91) is provided between the partition plate (9) and the connecting plate (5) to allow the glass plate (501) to be inserted.

4. The rotary glass sheet material feeding mechanism according to claim 3, characterized in that: Also includes: There are a plurality of positioning pins (401) which are arranged on the hexagonal plate (4) in a pop-up manner. The connecting plate (5) is provided with holes matching the positioning pins (401). After the positioning pins (401) are separated from the holes on the connecting plate (5), the hexagonal frame can be folded.

5. The rotary glass sheet material feeding mechanism according to claim 4, characterized in that: Also includes: A curved support plate (101) is arranged on the top of the support frame (1) and is flush with the top of the hexagonal frame.

6. The rotary glass sheet material feeding mechanism according to claim 5, characterized in that: Also includes: The guide slide bars (63) are evenly installed on the movable plate (61) and are slidably connected to the fixed plate (62).

7. The rotary glass sheet material feeding mechanism according to claim 6, characterized in that: The slider positioning member (8) comprises: a sliding block (81) slidably arranged on both sides of the transmission shaft (3), the support plate (7) being hinged to the sliding block (81); a positioning top ball (82), the side wall of the sliding block (81) being provided with a mounting hole (821) penetrating in a direction toward the transmission shaft (3), the positioning top ball (82) being movably arranged in the sliding block (81); a spring (83) being arranged in the mounting hole (821) to press the positioning top ball (82); and positioning holes (86) matching with the positioning top ball (82) are arranged at intervals on the transmission shaft (3).

8. The rotary glass sheet material feeding mechanism according to claim 7, characterized in that: Also includes: A screw rod (84) is screwed onto the mounting hole (821), and an end of the screw rod (84) abuts against the spring (83) to adjust the pressure applied by the spring (83) to the positioning ball (82).

9. The rotary glass sheet material feeding mechanism according to claim 8, characterized in that: Also includes: The limiting plate (85) is mounted on the sliding block (81), and after the supporting plate (7) is turned over and unfolded to a straight state at a hinge point on the sliding block (81), it is supported by the limiting plate (85) and no longer turns over.

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