JP7016162B2 - Conveyor belt device - Google Patents

Description

The present invention relates to a transport belt device, and relates to a device or the like which is arranged on the downstream side of the top seal device of a packaging machine and transports the package or the like after passing through the top seal device while holding down the package or the like.

For example, a pillow wrapping machine continuously supplies a strip-shaped wrapping film wound on a roll of raw fabric to a bag making machine, and makes a tubular bag when passing through the bag making machine. Then, the center sealing device arranged on the downstream side of the bag making device seals the film polymerized ends that are formed into a cylinder through the bag making device and are overlapped with each other. This seal forms a tubular film. Further, a product transporting / supplying device is arranged on the upstream side of the bag making device, and products transported from the product transporting / supplying device at predetermined intervals are supplied into the bag making device. As a result, when the product passes through the bag making device, it is stored in the tubular packaging film at predetermined intervals, and the product is conveyed together with the tubular packaging film.

The leading portion of the wrapping film made into a tubular bag passes through the top sealing device arranged on the carry-out side of the pillow packaging machine, and projects to the downstream side of the top sealing device. Then, the top sealing device seals and cuts the film portion between the product stored in the leading portion thereof and the subsequent product in the direction orthogonal to the traveling direction of the packaging film, that is, in the transverse direction. do. As a result, the leading portion of the packaging film is separated from the subsequent portion, and the packaging is manufactured. The package is conveyed by a carry-out conveyor arranged on the downstream side of the top sealing device.

By the way, if the package is sealed and cut with more air entering the inside of the leading portion of the packaging film, the package will be in a swollen state. In order to suppress the occurrence of such a state, for example, as in the invention disclosed in Patent Document 1, a device provided with a degassing means for discharging air in the tip portion of the packaging film protruding downstream of the top seal device. There is. In the top seal device (end seal device) disclosed in Patent Document 1, top sealers arranged vertically move up and down. Then, a degassing means is attached to the upper top sealer, and the degassing means moves up and down integrally with the top sealer, holds down the packaging film from above as it moves down, and is closer to the front end of the packaging film on the carry-out conveyor. Alternatively, the part near the rear end where the product is not located is pressed from above to expel the air in the packaging film.

Japanese Patent No. 4392525

In the device disclosed in Patent Document 1, since the degassing means moves up and down integrally with the top sealer, the degassing device has a structure that greatly protrudes to the downstream side of the top seal device, and the downstream portion of the top seal device. It is difficult to perform cleaning and maintenance in Japan, and there is a problem in terms of hygiene and cleanability. Further, there is a problem that the size of the package cannot be changed.

Further, for example, considering that the holding brush arranged on the upstream side of the top sealing device of Patent Document 1 is arranged on the downstream side of the top sealing device, the holding brush comes into contact with the upper surface of the packaging film and the package. Is a brush, and its function and purpose is to prevent the package from floating, and it is not possible to hold the package firmly and transport it.

Then, in order to firmly hold down the package and the products to be stored, for example, a belt device equipped with an endless belt is arranged above the transport surface on the downstream side of the top seal device, and the belt surface of the endless belt comes into contact with the package. Considering that, the following problems arise. First, it is necessary to move the position of the belt surface of the endless belt according to the size change of the package. Therefore, if the drive motor of the belt device constituting the lower transport surface and the drive motor of the belt device for holding the upper side are separately arranged, for example, the endless belt of the upper belt device can be moved together with the drive motor. However, such a configuration requires a drive motor, which is not preferable because it is large in size.

The above-mentioned problems are described as independent of each other, and the present invention does not necessarily have to be able to solve all of the described problems, as long as at least one problem can be solved. In addition, we have the intention to acquire the rights to the structure for solving this problem independently by divisional application, amendment, etc.

In order to solve the above-mentioned problems, the transport belt device of the present invention is (1) arranged on the downstream side of the top seal device that seals and cuts the packaging film in a direction orthogonal to the transport direction to form a transport surface. The lower belt device is provided with an upper belt device arranged above the lower belt device, and the upper belt device has a function of restraining a conveyed object moving on the lower belt device from above, and the lower belt is provided. The device and the upper belt device are configured to be rotationally driven by receiving the output of the same drive motor, and the upper belt device is configured to be movable in the vertical direction and in the front-rear direction along the transport direction of the conveyed object. The power transmission mechanism that transmits the rotational output of the drive motor to the upper belt device allows the upper belt device to move in the vertical direction and the front-rear direction so as to perform power transmission. One timing belt, a plurality of timing pulleys defining the movement trajectory of the timing belt, a first moving plate arranged so as to be able to move up and down, and the first moving plate moving forward and backward along the transport direction. A second moving plate that is movably attached is provided on the first moving plate with a first moving timing pulley that is part of the plurality of timing pulleys and a first moving tension that contacts the outer surface of the timing belt. A pulley and a third moving tension pulley are attached so as to support the bearings, and each of these pulleys is configured to move up and down as a whole while maintaining a relative positional relationship as the first moving plate moves up and down. The moving plate includes a second moving timing pulley that is a part of the plurality of timing pulleys, a second moving tension pulley that contacts the outer surface of the timing belt, and a rotation shaft of the drive pulley of the upper belt device. Each of these pulleys is mounted so as to support the bearings, and each of these pulleys is configured to move back and forth as a whole while maintaining a relative positional relationship with the forward and backward movement of the second moving plate, and the first moving plate moves up and down and or the above. The movement locus is changed according to the forward / backward movement of the second moving plate .

In this way, the output of one drive motor can be used to drive the upper belt device and the lower belt device. Further, the upper belt device can be moved up and down and back and forth without moving the position of the drive motor. For example, even if the size of the package is changed, the belt surface of the upper belt device is placed on the upper surface of the package or the like. It can be brought into contact with each other and can be reliably suppressed, and the package or the like can be stably conveyed while being sandwiched between the upper belt device and the lower belt device from above and below. Therefore, the package or the like can be moved in a desired transport posture regardless of the size, type, weight, or the like of the package or the like. Since the power transmission mechanism can allow the upper belt device to move in the vertical direction and the front-back direction to transmit power, the upper belt device on the transport surface side can have a simple structure, the cleaning work becomes easy, and hygiene. It is also preferable from the viewpoint of the surface.

The power transmission mechanism has one timing belt and a plurality of timing pulleys that define the movement trajectory of the timing belt, and a part of the plurality of timing pulleys can move in the vertical direction and / or the front-back direction. When the movement locus is changed according to the positions of the upper belt device in the vertical direction and the front-back direction, for example, a mechanism using a plurality of timing belts or a double-tooth belt can be used. Compared to this, it is good because it can be realized with a simple configuration and can be configured at low cost.

(2) The upper belt device includes a drive pulley arranged on the front side in the transport direction, a driven pulley arranged on the rear side in the transport direction, and an endless belt spanned between the drive pulley and the driven pulley. The drive pulley is rotated by receiving the output of the drive motor via the power transmission mechanism to rotationally drive the endless belt, and the driven pulley follows the rotation of the endless belt. It rotates on its axis, and the rotation shaft of the drive pulley is cantilevered and supported on the power transmission mechanism side, and the rotation shaft is integrated with the vertical and / or front-rear movement of a part of the plurality of timing pulleys. It is good to be configured to move. In this way, the second moving plate moves up and down together with the up and down movement of the first moving plate, and moves independently in the front-back direction. Therefore, the timing pulley, etc. that only moves up and down is attached to the first moving plate, and the timing pulley, etc. that wants to move up and down and back and forth is attached to the second moving plate. Can be used as the movement trajectory of the timing belt when the is positioned at a desired position. Therefore, the power transmission mechanism has a simpler configuration and operation.

(3) The upper belt device is configured to be rotatable forward and reverse within a predetermined angle range as the rotation center of the drive pulley as a whole, and has a basic posture in which the lower belt surface of the endless belt is horizontally located. It is advisable to configure the structure so that it can be displaced from the basic posture to a standby posture that is rotated by a predetermined angle and jumped up. In this way, for example, when the endless belt is flipped up and displaced to the standby posture, the space on the downstream side of the top seal device is expanded, and access to the top seal device can be facilitated.
(4) The rotating shaft of the drive pulley penetrates the bearing portion of the double bearing structure and is linked to the power transmission mechanism side, and the bearing portion supports the bearing so as to allow the rotation of the rotating shaft. It is preferable to support the bearing around the axis of the rotating shaft so as to allow forward and reverse rotation of each upper belt device.

(5) The upper belt device may include an endless belt that goes around without folding back. In this way, the structure of the upper belt device is further simplified, which is preferable from the viewpoint of hygiene and cleanability. In addition, a space is secured above the transport surface of the lower belt device, and the workability of the maintenance work of the top seal device is improved.

According to the present invention, since the upper belt device is arranged on the downstream side of the top seal device so as to be vertically aligned and movable in the front-rear direction, the package or the like carried out from the top seal device is reliably suppressed, and the desired transport posture is achieved. You can move as it is. Furthermore, the transport surface side on the downstream side of the top seal device has a structure as simple as possible, which is good from the viewpoint of hygiene and cleanability.

It is a front view which shows one preferable embodiment of the conveyor belt apparatus which concerns on this invention. It is the perspective view. It is the rear view. (A) is a perspective view showing a main part from the back side, and (b) and (c) are views showing an example of displacement of the movement locus of the timing belt. (A) is a view showing a part of the conveyor belt device from the front side, and (b) and (c) are views showing an example of displacement of the movement locus of the timing belt. (A) is a view showing a part of the conveyor belt device from the back side, and (b) and (c) are views showing an example of displacement of the movement locus of the timing belt. It is a figure which shows an example of the position movement and posture displacement of a belt unit 32.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to this and can be modified, modified or improved based on the knowledge of those skilled in the art as long as it does not deviate from the scope of the present invention.

The transport belt device 10 of the present embodiment is arranged near the downstream side of the top seal device 1 of the main body of the packaging machine. The top sealing device 1 includes an upper rotating shaft 2 and a lower rotating shaft 3 arranged vertically across a transport line for packaging films, and the upper rotating shaft 2 is provided with three upper top sealers 4 at equal intervals. Attach, three lower top sealers 5 are attached to the lower rotating shaft 3 at equal intervals. Both the upper top sealer 4 and the lower top sealer 5 have a built-in heater and heat the sealing surface at the tip to a desired temperature. The upper top sealer 4 has a built-in cutter blade that can protrude from the sealing surface at the tip thereof, and the lower top sealer 5 has a receiving blade or the like that receives the cutter blade on the sealing surface at the tip thereof. The upper rotation shaft 2 and the lower rotation shaft 3 rotate in synchronization with each other, and each time the upper rotation shaft 2 and the lower rotation shaft 3 rotate by 120 degrees, the sealing surfaces of the corresponding upper top sealer 4 and lower top sealer 5 come into contact with each other. During operation of the wrapping machine main body, the sealing surfaces of the upper top sealer 4 and the lower top sealer 5 sandwich the wrapping film 7 from above and below with a predetermined pressure, and indirectly contact each other via the wrapping film 7. Further, in the present embodiment, the lower rotation shaft 3 is provided with a guide member 6 having an arc-shaped guide surface in the space between the adjacent lower top sealers 5.

The conveyor belt device 10 includes a lower belt device 11 and an upper belt device 12 arranged vertically, and the lower belt device 11 and the upper belt device 12 receive the output of the same drive motor 13 and rotate in synchronization with each other. Drive.

The lower belt device 11 passes through the top sealing device 1 and projects to the downstream side of the wrapping film 7 before being cut, and the wrapping body 8 that is cut and separated from the subsequent wrapping film 7. Conveyors are constructed. The lower belt device 11 makes the first endless belt 15 more than a pair of pulleys 16 arranged at the front and rear ends of the transport surface, a plurality of pulleys 17 arranged at predetermined positions in the space below the transport surface, and those pulleys 17. It is configured to be hung on a drive pulley 18 arranged at a predetermined position below. The pair of pulleys 16 and the plurality of pulleys 17 are supported by a machine frame arranged on the back side (not shown) in a cantilevered state, and are configured to be rotatable in a free state. The drive pulley 18 connects the rotating shaft 19 to the output shaft 20 of the drive motor 13. As a result, when the drive motor 13 operates and the output shaft 20 rotates, the drive pulley 18 also rotates integrally. Along with the rotation of the drive pulley 18, the first endless belt 15 rotates, and the pulleys 16 and 17 rotate on their rotations following the rotation of the first endless belt 15, promoting smooth rotation of the first endless belt 15. ..

The tip of the packaging film 7 protruding to the downstream side of the top seal device 1 and the package 8 manufactured by passing through the top seal device 1 are placed on the upper surface of the first endless belt 15 and are first endless. It moves forward as the belt 15 rotates.

The upper belt device 12 includes a drive pulley 21 arranged in front of the package 8 in the transport direction, two driven pulleys 22 and 23 arranged in the rear in the transport direction, and the drive pulley 21, driven pulleys 22 and 23. A second endless belt 24 is provided so as to hang between them. The driven pulleys are arranged at two locations above and below, and the lower driven pulley 22 is located upstream of the upper driven pulley 23. Further, the lowermost end position of the side surface of the driven pulley 22 on the lower side of the upper belt device 12 and the lowermost end position of the side surface of the drive pulley 21 in the operating state are set to the same height position, and the upper end position of the upper belt device 12 is set. The uppermost position of the side surface of the driven pulley 23 and the uppermost position of the side surface of the drive pulley 21 are set to be at the same height position. As a result, in the second endless belt 24 of the upper belt device 12 in the operating state, the lower belt surface and the upper belt surface that move along the transport direction are both parallel to the transport surface, and the upper belt is driven. The belt surface from the pulley 23 to the driven pulley 22 on the lower side is an inclined surface. As described above, as is clear from FIG. 1 and the like, the movement locus of the second endless belt 24 has a shape that goes around by a simple route without taking a detour route or a turn-back route.

The rotary shaft 25 of the drive pulley 21 is rotatably supported by a bearing portion 26 connected to a side wall portion 27 arranged on both sides of the second endless belt 24 in the transport direction. Further, a strip-shaped connecting plate 28 extending to the upstream side is attached to the upper end of the outer surface of each side wall portion 27 on the upstream side, and a plate that is rotatable in a horizontal plane is attached to the upstream end of the connecting plate 28. Attach 29. The moving plate 29 is a plate member having a substantially triangular shape, and is provided with bearing portions in the vicinity of two vertices having a substantially triangular shape, and the bearing portions support the two driven pulleys 22 and 23. The moving plate 29 is configured to be rotatable forward and backward by a predetermined angle around the rotation axis of the upper driven pulley 23. For example, the basic posture shown in FIG. 1 and a range rotated counterclockwise from the basic posture. Rotate forward and reverse within.

The moving plate 29 is connected to the side wall portion 27 via a link-type locking mechanism 30, and in a state of being locked by the locking mechanism 30, the moving plate 29 maintains the basic posture shown in the figure, and the drive pulley 21 and the driven pulley 21 are driven. The second endless belt 24 spanned on the pulleys 22 and 23 is in a state where a predetermined tension is applied. On the other hand, when the operation lever 31 is operated to release the lock by the lock mechanism 30, the moving plate 29 is pulled toward the side wall portion 27 side (downstream side), and the moving plate 29 is accordingly moved in the counterclockwise direction (front side as shown in FIG. 1). The driven pulley 22 on the lower side moves to the downstream side by rotating according to the view from the viewpoint). Then, the tension applied to the second endless belt 24 is released, and the second endless belt 24 is in a loosened state. Then, in the present embodiment, the second endless belt 24 is hung on the three pulleys of the drive pulley 21 and the driven pulleys 22 and 23 and takes a simple path. Therefore, for example, the second endless belt 24 is changed from the loosened state. The two-endless belt 24 can be easily removed. Further, as will be described later, the back side of the rotating shaft 25 of the drive pulley 21 is in a state of being cantilevered and supported in a state of being linked to the mounting plate 33 and the power transmission mechanism 40, and the second endless belt 24 is on the front side. Since there is no device or mechanism that interferes with the removal, the second endless belt 24 can be attached and detached more easily. Therefore, maintenance such as cleaning and replacement of belts and other parts can be easily performed.

As described above, the drive pulley 21, the driven pulley 22, 23, and the second endless belt 24 constitute a belt unit 32 in which the side wall portion 27, the connecting plate 28, the moving plate 29, the lock mechanism 30, and the like are integrated. Then, the belt unit 32 is rotatably linked to the mounting plate 33 arranged on the back side of the arrangement space of the second endless belt 24. That is, the rotating shaft 25 of the drive pulley 21 extends the back side as it is, penetrates the mounting plate 33, and further connects the first gear 35 to the tip thereof. Then, a bearing portion 36 is provided at a portion where the rotation shaft 25 of the mounting plate 33 penetrates, and the belt unit 32 is linked via the bearing portion 36. The bearing portion 36 has a double bearing structure, and supports the bearing so as to allow the rotation of the above-mentioned rotating shaft 25, and also supports the bearing around the rotating shaft 25 so as to allow forward and reverse rotation of each base unit. do. Further, the belt unit 32 is linked only to the mounting plate 33 in a cantilevered support state via the bearing portion 36.

Then, during normal operation, as shown in FIG. 1 and the like, the second endless belt 24 takes a basic posture that allows the upper and lower belt surfaces to move in the horizontal plane, and is driven by the rotating shaft 25 in that basic posture. When the pulley 21 rotates, the second endless belt 24 rotates accordingly. On the other hand, when urged from this state in a direction of rotating the rotating shaft 25 so as to flip up the upstream side of the belt unit 32 with the rotating shaft 25 as the center of rotation, the bearing portion 36 allows the rotation, and the belt unit 32 rotates, that is, the bearing portion 36. It rotates around the shaft 25 as the center of rotation, and reaches an upright standby posture as shown by a two-point chain line in FIG. 7 (c), for example. As described above, the belt unit 32 is also cantilevered by the bearing portion 36 and is not supported by others. Therefore, the belt unit 32 can be easily switched between the basic posture and the standby posture without any particular restriction. can do. Since the bearing portion 36 has a double bearing structure, the rotating shaft 25 does not rotate even if the belt unit 32 is rotated in the forward and reverse directions, and the drive system and the power transmission system are not hindered.

Further, when the belt unit 32 takes this standby posture, the space in which the belt unit 32 has existed until then is opened, and maintenance such as cleaning of the surroundings and replacement of parts can be easily performed.

Further, as shown in FIG. 7A, the belt unit 32 of the present embodiment is configured so as to be vertically movable as a whole, and further, as shown in FIG. 7B, the entire belt unit 32 is conveyed. It is configured to be able to move forward and backward along the direction. By appropriately combining these movements, the belt unit 32 can be positioned at an arbitrary position in the secondary plane in the vertical plane and fixedly arranged at that position. Therefore, for example, the second endless belt 24 is arranged at a height position where the product can be suppressed via the packaging film 7 according to the height of the product contained in the package, or the entire length of the package 8 or the like. Accordingly, the tip position on the upstream side of the second endless belt 24 can be adjusted to an appropriate position.

Next, the power transmission mechanism 40 that transmits the rotational force of the output shaft 20 of the drive motor 13 to the drive pulley 21 of the upper belt device 12 will be described. The power transmission mechanism 40 hangs the timing belt 41 on the timing pulley arranged at an appropriate position, and brings the tension pulley into contact with the flat surface 41a on the outside of the timing belt 41 and connects it to the output shaft of the predetermined timing pulley. The output of the drive motor 13 is transmitted to the drive pulley 21 by engaging the second gear 42 with the first gear 35 connected to the tip of the rotary shaft 25 of the drive pulley 21. Further, the predetermined pulley is configured to move back and forth and up and down as the belt unit 32 moves back and forth and up and down, and the output of the drive motor 13 can be transmitted to the drive pulley 21 regardless of the position of the belt unit. It is configured in. The specific configuration and structure are as follows.

A drive timing pulley 46 is attached to a rotary shaft 19 connected to the output shaft 20 of the drive motor 13, and the drive timing pulley 46 is engaged with the drive timing pulley 46 at the lowest position of the movement locus of the timing belt 41. Further, a first fixed timing pulley 47 is arranged diagonally above the drive timing pulley 46 (diagonally above the left in FIGS. 3, 4, and 6 when viewed from the rear side), and the first fixed timing pulley 47 is arranged. , Engage with the inner peripheral surface of the timing belt 41. On the other hand, the first fixed tension pulley 48 is arranged diagonally above the drive timing pulley 46 on the opposite side of the first fixed timing pulley 47 (diagonally above the right in FIGS. 3, 4, and 6 when viewed from the rear side). Then, the first fixed tension pulley 48 is brought into contact with the flat surface 41a on the outer side of the timing belt 41, and a predetermined tension is applied to the timing belt 41.

A second fixed timing pulley 49 is arranged at a predetermined position above the first fixed timing pulley 47, and the second fixed timing pulley 49 is engaged with the inner peripheral surface of the timing belt 41. The second fixed timing pulley 49 is located at the uppermost position of the movement locus of the timing belt 41, and the second fixed timing pulley 49 and the first fixed timing pulley 47 are in the vertical direction (vertical direction) of the downstream predetermined position. Place on the same straight line. The belt surface of the timing belt 41 that moves between the first fixed timing pulley 47 and the second fixed timing pulley 49 is located in a vertical plane. The three pulleys of these fixed systems are supported by bearings at appropriate positions such as the base plate 50 and rotate in a free state.

On the other hand, the first movement timing pulley 51 and the second movement timing pulley 52 are arranged on the same straight line in the vertical direction (vertical direction) at a predetermined position on the upstream side, and both timing pulleys are respectively on the inner peripheral surface of the timing belt 41. Engage in place. Then, the output shaft 53 of the lower second movement timing pulley 52 becomes the output of the power transmission mechanism 40, and the second gear 42 is connected to the output shaft 53.

Further, a first moving tension pulley 55 is arranged at a predetermined position between the second fixed timing pulley 49 and the first moving timing pulley 51, and the first moving tension pulley 55 is placed between the second fixed timing pulley 49 and the first. The timing belt 41 is brought into contact with the outer surface of the timing belt 41 located in the path between the moving timing pulleys 51, and a predetermined tension is applied to the timing belt 41. A second moving tension pulley 56 is arranged at a predetermined position between the first moving timing pulley 51 and the second moving timing pulley 52, and the second moving tension pulley 56 is placed between the first moving timing pulley 51 and the second moving timing. The timing belt 41 is brought into contact with the outer surface of the timing belt 41 located in the path between the pulleys 52, and a predetermined tension is applied to the timing belt 41. Further, a third moving tension pulley 57 is arranged at a predetermined position between the second moving timing pulley 52 and the first fixed tension pulley 48, and the third moving tension pulley 57 is first fixed to the second moving timing pulley 52. The timing belt 41 is brought into contact with the outer surface of the timing belt 41 located in the path between the tension pulleys 48, and a predetermined tension is applied to the timing belt 41.

The first moving timing pulley 51, the first moving tension pulley 55, and the third moving tension pulley 57 are bearing-supported at predetermined positions of the first moving plate 61. For example, the first moving plate 61 moves up and down with the forward and reverse rotation of the ball screw 65, and with the raising and lowering of the first moving plate 61, the first moving timing pulley 51, the first moving tension pulley 55, and the third moving tension pulley 57 Ascends and descends as a whole while maintaining the relative positional relationship.

A second moving plate 62 that moves forward and backward along the transport direction of the package 8 is attached to the first moving plate 61, and the second moving timing pulley 52 and the second moving tension pulley are attached to the second moving plate 62. 56, the rotating shaft 25 of the drive pulley 21 and the like are supported by bearings. The second moving plate 62 moves up and down together with the first moving plate 61, and receives power from a predetermined drive source to move forward and backward along the transport direction. For driving the forward / backward movement of the second moving plate 62, for example, an LM guide 63 is used.

The second moving timing pulley 52, the second moving tension pulley 56, and the rotating shaft 25 of the drive pulley 21 attached to the second moving plate 62 move as the first moving plate 61 moves up and down, and the first moving timing pulley 51, It moves up and down together with the first moving tension pulley 55 and the third moving tension pulley 57. Then, the rotation shaft 25 of the second movement timing pulley 52, the second movement tension pulley 56, and the drive pulley 21 moves forward and backward with the second movement plate 62, and the first movement timing pulley 51, the first movement tension pulley 55. In addition, it moves forward and backward relative to the third moving tension pulley 57. As described above, the rotary shaft 25 of the drive pulley 21 moves up and down following the ascending / descending movement of the first moving plate 61, and follows the forward / backward movement of the second moving plate 62 along the horizontal plane along the transport direction. Move forward and backward. Along with the movement of the rotating shaft 25, the drive pulley 21 connected to the rotating shaft 25 and the belt unit 32 integrated with the drive pulley 21 also move in the same direction. As a result, the belt unit 32 can be moved to an arbitrary place within a predetermined range in the vertical plane.

That is, for example, the belt unit 32 shown by the solid line in each figure is in the state of the basic posture and is located in the standby position of the lowermost position and the uppermost flow side position. In each drawing, each pulley and timing belt 41 constituting the power transmission mechanism 40 shown by the solid line shows the position and appearance when the belt unit 32 is in the standby position.

From this state, for example, when the hydraulic motor 64 is driven and the first moving plate 61 is moved upward, the second moving plate 62 is also moved upward, and the first moving timing pulleys 51 and the first are attached to the moving plates. The moving tension pulley 55, the third moving tension pulley 57, the second moving timing pulley 52, and the second moving tension pulley 56 are raised. Along with this ascent, the movement locus of the timing belt 41 hung on each of these pulleys is displaced as shown by the alternate long and short dash line in FIGS. 4 (c), 5 (c), and 6 (c). Further, as the second moving plate 62 rises, the rotation shaft 25 of the drive pulley 21 also rises, and the belt unit 32 rises as shown by the alternate long and short dash line in FIG. 7A.

On the other hand, when the LM guide 63 is driven and the second moving plate 62 is moved forward to the downstream side along the transport direction from the state of the standby position described above, for example, the second moving timing attached to the second moving plate is obtained. The pulley 52 and the second moving tension pulley 56 move forward in the horizontal direction. Along with this forward movement, the movement locus of the timing belt 41 hung on each of these pulleys is displaced as shown by the alternate long and short dash line in FIGS. 4 (b), 5 (b), and 6 (b). .. Further, with the forward movement of the second moving plate 62, the rotary shaft 25 of the drive pulley 21 also moves forward, and the belt unit 32 moves forward as shown by the alternate long and short dash line in FIG. 7B.

Although specific illustration is omitted, the hydraulic motor 64 and the LM guide 63 are appropriately operated to move the first moving plate 61 and the second moving plate 62 to appropriate positions, and the belt unit 32 is moved to a vertical plane. It can be positioned at any position within.

Further, regardless of the position of the belt unit 32, the belt unit 32 in the reference posture can be rotated to take a standby posture, or can be displaced by returning from the standby posture to the reference posture (see FIG. 7 (c)). can.

Although various aspects of the present invention have been described above using embodiments, these embodiments and explanations are not intended to limit the scope of the present invention, and are intended to contribute to the understanding of the present invention. It should be added that it was provided. The scope of the invention is not limited to the configurations and manufacturing methods expressly described herein, but also includes combinations of various aspects of the invention disclosed herein. Of the present invention, the configuration for which a patent is sought is specified in the appended claims, but even if the configuration is not currently specified in the claims, it is disclosed in the present specification. I would like to mention that there is a possibility of claiming a patent for this configuration in the future.

1: Top seal device 7: Packaging film 8: Package 10: Conveyance belt device 11: Lower belt device 12: Upper belt device 13: Drive motor 15: First endless belt 21: Drive pulley 22: Driven pulley 23: Driven pulley 24: Second endless belt 25: Rotating shaft 32: Belt unit 40: Power transmission mechanism 41: Timing belt 46: Drive timing pulley 47: First fixed timing pulley 48: First fixed tension pulley 49: Second fixed timing pulley 51 : First moving timing pulley 52: Second moving timing pulley 55: First moving tension pulley 56: Second moving tension pulley 57: Third moving tension pulley 61: First moving plate 62: Second moving plate

Claims (5)

A lower belt device arranged on the downstream side of the top sealing device that seals and cuts the packaging film in a direction orthogonal to the transport direction to form a transport surface, and an upper belt device arranged above the lower belt device. Prepare,
The upper belt device has a function of restraining a conveyed object moving on the lower belt device from above.
The lower belt device and the upper belt device are configured to receive the output of the same drive motor and drive to rotate.
The upper belt device is configured to be movable in the vertical direction and in the front-rear direction along the transport direction of the transported object.
The power transmission mechanism that transmits the rotational output of the drive motor to the upper belt device allows the upper belt device to move in the vertical direction and the front-rear direction to transmit power .
The power transmission mechanism comprises one timing belt, a plurality of timing pulleys defining the movement locus of the timing belt, a first moving plate arranged so as to be movable up and down, and the first moving plate in the transport direction. Equipped with a second moving plate that can be moved forward and backward along
The first moving plate is supported by a first moving timing pulley that is a part of the plurality of timing pulleys, a first moving tension pulley that comes into contact with the outer surface of the timing belt, and a third moving tension pulley. It is mounted so as to support it, and each of these pulleys is configured to move up and down as a whole while maintaining a relative positional relationship as the first moving plate moves up and down.
The second moving plate includes a second moving timing pulley that is a part of the plurality of timing pulleys, a second moving tension pulley that contacts the outer surface of the timing belt, and a drive pulley of the upper belt device. The rotating shafts are mounted so as to support each bearing, and each of these pulleys is configured to move back and forth as a whole while maintaining a relative positional relationship as the second moving plate moves forward and backward.
A transport belt device characterized in that the movement locus is changed according to the ascending / descending movement of the first moving plate and / or the forward / backward movement of the second moving plate . The upper belt device includes the drive pulley arranged on the front side in the transport direction, a driven pulley arranged on the rear side in the transport direction, and an endless belt spanned between the drive pulley and the driven pulley. ,
The drive pulley rotates by receiving the output of the drive motor via the power transmission mechanism, and rotationally drives the endless belt.
The driven pulley rotates on its axis following the rotation of the endless belt.
The rotating shaft of the drive pulley is cantilevered and supported on the power transmission mechanism side.
The conveyor belt device according to claim 1, wherein the rotating shaft is configured to move integrally with the movement in the vertical direction and / or the front-back direction of a part of the plurality of timing pulleys. The upper belt device is configured to be rotatable forward and reverse within a predetermined angle range as the rotation center of the drive pulley as a whole, and the basic posture in which the lower belt surface of the endless belt is horizontally located and the basic posture thereof. The conveyor belt device according to claim 2, further comprising a configuration capable of being displaced to a standby posture in which the belt is rotated by a predetermined angle and jumped up. The rotating shaft of the drive pulley penetrates the bearing portion of the double bearing structure and is linked to the power transmission mechanism side.
The bearing portion is characterized in that it supports the bearing so as to allow the rotation of the rotating shaft, and also supports the bearing around the axis of the rotating shaft so as to allow forward and reverse rotation of each upper belt device. The conveyor belt device according to claim 3. The conveyor belt device according to any one of claims 1 to 4, wherein the upper belt device includes an endless belt that goes around without folding back.

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