Holding conveyor device and measurement system equipped with the same

Abstract

To provide a holding conveyor for conveying an article to be conveyed, which is further reduced in vibration.SOLUTION: This holding conveyor device comprises: a pair of holding conveyor units that hold opposing parts of an article to be conveyed; and a support that holds each of the holding conveyor units. Each of the holding conveyor units is provided with a base member supported on the support, driving and driven rollers supported at rotary shafts on the base member, a conveyor belt hooked to the driving and driven rollers, and a drive motor that rotates the driving roller. The support is disposed at a position opposite to a holding surface in the width direction of the holding conveyor units. The driven roller is provided with an inter-axis adjustment mechanism for adjusting an inter-axis distance between the driven roller and the driving roller with the base member in the longitudinal direction of the holding conveyor units.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present application relates to a pinch conveyor device that laterally pinches and conveys an object to be conveyed, and a weighing system equipped with the pinch conveyor device. [Background technology]

[0002] Conventionally, inspections such as weight measurement are performed on PET bottles and paper cartons containing beverages after filling them with the contents. As a weighing device for measuring the weight of PET bottles, paper cartons, etc., there is a weighing device that measures the weight while transporting them from upstream to downstream on a weighing conveyor. PET bottles, paper cartons, etc. are collectively called "transported objects." Since the weighing device measures the weight of the transported objects while transporting them, it is necessary to transport each transported object to the weighing device. For this reason, a clamping conveyor device is used to transport each transported object to the weighing device at a predetermined interval.

[0003] FIG. 7 is a plan view showing an example of a weighing system 200 equipped with a clamping conveyor device 100, and FIG. 8 is a side view. The clamping conveyor device 100 clamps the objects 300 carried in from the upstream carry-in conveyor 190 with a pair of clamping conveyor units 110, and transports the objects 300 to the transport conveyor 170 in the downstream direction in sequence at a predetermined speed. As a result, the objects 300 are transported downstream at a predetermined interval on the transport conveyor 170. The objects 300 that are spaced at a predetermined interval on the transport conveyor 170 are transported individually on the weighing conveyor 161 of the weighing device 160, and the weights of the objects 300 are measured individually. The objects 300 that have been weight-measured in the weighing device 160 are transported downstream by the outgoing conveyor 180.

[0004] An example of this type of prior art is a weighing conveyor that has a transport mechanism and a load detector, and measures the weight of the objects to be weighed while transporting them (see, for example, Patent Document 1). This weighing conveyor aims to increase the frequency band of the noise components to be removed and to increase the weighing speed by moving the combined center of gravity of the transport mechanism, its drive source, and the power transmission mechanism that transmits the drive force of the drive source to the transport mechanism closer to the moment center of the load detector in the vertical direction. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2002-13971 A Summary of the Invention [Problem to be solved by the invention]

[0006] 9, in the pinch conveyor device 100 shown in Fig. 7, a pair of pinch conveyor units 110 pinch the transported object 300 carried in from the carry-in conveyor 190 with a conveyor belt 114. For this reason, the pinch conveyor units 110 are supported by support parts 111 at downstream positions, and these support parts 111 are supported by pinch gap adjustment mechanisms 150. The pinch conveyor unit 110 is provided with a drive roller 112 and a driven roller 113, a conveyor belt 114 stretched around the drive roller 112 and the driven roller 113, and a drive motor 115 that rotates and drives the drive roller 112.

[0007] In the illustrated pinch conveyor unit 110, a drive motor 115 is disposed at a distance X1 away from the support portion 111 in order to place a tension roller 116 for adjusting the tension of the conveyor belt 114. In this case, vibration of the drive motor 115 may cause vibration in the pinch conveyor device 100. This vibration may affect the weight measurement of the transported object 300 by the weighing device 160 depending on conditions such as the installation location.

[0008] Incidentally, the above-mentioned prior art document is concerned with the removal of noise components in a weighing conveyor, and makes no mention whatsoever of vibrations in a pinch conveyor device.

[0009] An object of the present application is to provide a pinch conveyor device that clamps and conveys an object to be conveyed, in which vibrations are further reduced, and a weighing system equipped with the pinch conveyor device. [Means for solving the problem]

[0010] A clamping conveyor device according to one aspect of the present application is a clamping conveyor device having a pair of clamping conveyor units which clamp opposing portions of a conveyed object, and support parts which support each of the pair of clamping conveyor units, each of the pair of clamping conveyor units comprising a base member supported by the support parts, a drive roller and a driven roller whose rotating shafts are supported on the base member, a conveyor belt stretched between the drive roller and the driven roller, and a drive motor which rotates the drive roller, the support parts being positioned opposite the clamping surface in the width direction of the pair of clamping conveyor units, and the driven roller being provided with an axial distance adjustment mechanism which adjusts the axial distance between the driven roller and the drive roller between the base member and the pair of clamping conveyor units in the longitudinal direction of the pair of clamping conveyor units.

[0011] With this configuration, the pinch conveyor unit can adjust the tension of the conveyor belt hung between the drive roller and driven roller by adjusting the axial distance between the driven roller and the drive roller using the axial distance adjustment mechanism between the driven roller and the base member. By providing the driven roller with a mechanism for adjusting the tension of the conveyor belt, it is not necessary to provide a separate tension roller, and it is possible to position the drive motor closer to the support. By positioning the drive motor closer to the support, the moment generated by the drive motor is smaller, and vibration generated in the pinch conveyor device can be reduced.

[0012] The support portion and the drive motor may be disposed upstream or downstream of a longitudinal center portion of the pair of pinching conveyor units.

[0013] With this configuration, a pair of clamping conveyor units that clamp the transported object are supported by support portions located upstream or downstream of the longitudinal midpoint, and the drive motor that drives the drive roller is also positioned upstream or downstream of the longitudinal midpoint of the clamping conveyor unit, thereby reducing the moment generated by the drive motor and reducing the vibration generated in the clamping conveyor device.

[0014] In addition, the axis adjustment mechanism may have a guide portion provided on the base member for guiding both ends of the rotating shaft of the driven roller in a direction in which the axis distance with the drive roller changes, and an adjustment member provided on both ends of the rotating shaft for changing the position of the rotating shaft relative to the base member along the guide portion.

[0015] With this configuration, the tension of the conveyor belt can be adjusted by the adjustment members provided at both ends of the rotation shaft of the driven roller. As a result, the tension of the conveyor belt can be adjusted to an appropriate state by adjusting the center distance between the drive roller and both ends of the rotation shaft of the driven roller.

[0016] In addition, the adjustment member may be an adjustment bolt whose tip abuts against the base member when screwed into threaded portions provided at both ends of the rotating shaft, and the guide portion may have an opening that opens the top side of the adjustment bolt.

[0017] With this configuration, the top side of the adjustment bolt, which is the adjustment member, can be rotated through the opening, and the center distance between the drive roller and the driven roller can be easily adjusted by the amount the adjustment bolt is screwed in.

[0018] The base member may further include a cover member that covers a side of the conveyor belt other than the surface that clamps the transported object, and the cover member may have an opening at the opening portion.

[0019] With this configuration, the cover member can cover the sides other than the surfaces on which the conveyor belt holds the object, and the adjustment bolt can be easily adjusted through the opening of the cover member.

[0020] The conveyor may also be provided with a clamping gap adjustment mechanism for adjusting the clamping gap of the transported object in the short direction by the pair of clamping conveyor units, the clamping gap adjustment mechanism including a pair of support blocks supporting each of the support portions, an adjustment shaft for moving the pair of support blocks in a direction narrowing the clamping gap or in a direction widening the clamping gap, and a handle for rotating the adjustment shaft.

[0021] With this configuration, each clamping conveyor unit can easily adjust the clamping interval of the object being transported by the conveyor belt by rotating the adjustment shaft with the handle of the clamping interval adjustment mechanism to change the interval between the support blocks.

[0022] On the other hand, a weighing system according to one embodiment of the present application comprises a clamping conveyor device, a transport conveyor for transporting the transported objects transported by the pair of clamping conveyor units in a downstream direction, and a weighing device having a weighing conveyor for weighing the weight of the transported objects sent in by the transport conveyor, and the clamping conveyor device, the transport conveyor and the weighing device are provided on an integrally formed stand.

[0023] According to this configuration, the drive motor of the pinch conveyor unit is located close to the support, so that the vibration of the pinch conveyor device can be reduced, and the pinch conveyor device, the transport conveyor, and the weighing device can be mounted on an integrated stand. Therefore, the weighing system can be configured compactly.

[0024] The clamping conveyor device may be provided at least one of an upstream side, in the conveying direction, where the transported objects are carried in relative to the weighing device, and a downstream side, in the conveying direction, where the transported objects are carried out.

[0025] With this configuration, when the clamping conveyor device is provided on the upstream side in the conveying direction where the transported object is brought in, the transported object brought in from the upstream direction can be clamped by the pair of clamping conveyor units and transported in the downstream direction.When the clamping conveyor device is provided on the downstream side in the conveying direction where the transported object is carried out, the transported object can be clamped by the pair of clamping conveyor units and transported in the downstream direction. Effect of the Invention

[0026] According to the present application, it is possible to further reduce vibrations of a clamping conveyor that clamps and conveys an object to be conveyed. [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is a front view showing a pinch-conveyor device according to an embodiment of the present application. [Diagram 2] FIG. 2 is an enlarged plan view showing a nip-conveyor unit of the nip-conveyor device shown in FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along the line III-III of FIG. [Figure 4] FIG. 4 is an enlarged perspective view showing a driven roller portion of the nip-conveyor device shown in FIG. [Diagram 5] FIG. 5 is a plan view showing the shaft distance adjustment mechanism of the driven roller shown in FIG. [Figure 6] FIG. 6 is a side view showing an example in which the pinch conveyor device and the weighing device shown in FIG. 1 are mounted on one stand. [Figure 7] FIG. 7 is a plan view showing an example of a weighing system equipped with a pinch conveyor device. [Figure 8] FIG. 8 is a side view of the weighing system shown in FIG. [Figure 9]FIG. 9 is an enlarged plan view showing a nip-conveyor unit of the nip-conveyor device shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] The following embodiment is a pinch conveyor device 1 according to an embodiment of the present application. The following embodiment will be described taking as an example a pinch conveyor device 1 provided in a weighing system 2. The concepts of "upstream" and "downstream" directions in this specification and claims correspond to the concepts of the left direction, which is the carry-in side of the transported object 300, as "upstream" and the right direction, which is the carry-out side of the transported object 300, as shown in FIG. 6, in the weighing system 2.

[0029] In the front view of Fig. 1, the clamping interval W in the width direction of the transported object 300 is the short side direction (left-right direction) of the pinch conveyor device 1 according to one embodiment of the present application, and in Fig. 2, the direction in which the transported object 300 is transported from the upstream side, which is the carry-in side, to the downstream side, which is the carry-out side, is the longitudinal direction of the pinch conveyor device 1. Moreover, the up-down direction in Fig. 1 coincides with the vertical direction.

[0030] <Nip conveyor device> As shown in FIG. 1, the pinch conveyor device 1 of this embodiment includes a pair of pinch conveyor units 10 that pinch a transported object 300 with a conveyor belt 14. A pair of support parts 11 are arranged in the pair of pinch conveyor units 10 at positions opposite to the pinch surface of the transported object 300, and support the pair of support parts 11. The pair of support parts 11 are supported by a pair of support blocks 51 provided in a pinch gap adjustment mechanism 50. The pinch gap adjustment mechanism 50 has an adjustment shaft 52 that moves each of the support blocks 51 in a direction that narrows the pinch gap W or in a direction that widens the pinch gap W, and a handle 53 that rotates the adjustment shaft 52. The support block 51 moves in the left-right direction (width direction) of the figure along a guide shaft 54 ​​provided in a stand 75. The clamping gap adjustment mechanism 50 has a female thread portion 51a that screws into a male thread portion 52a provided on the adjustment shaft 52, and by rotating the adjustment shaft 52 with a handle 53, the pair of support parts 11 are moved in a direction that narrows the clamping gap W or in the opposite direction that widens the clamping gap W. By rotating the handle 53, the clamping gap adjustment mechanism 50 moves the pair of support blocks 51 in opposite directions in the width direction, thereby adjusting the clamping gap W of the pair of clamping conveyor units 10.

[0031] The clamping gap adjustment mechanism 50 can, for example, provide female threads 51a in mutually opposite directions on the pair of support parts 11 and provide male threads 52a in mutually opposite directions corresponding to the adjustment shaft 52, so that the pair of support blocks 51 can be moved in opposite directions by rotating the handle 53. In this way, the clamping gap adjustment mechanism 50 can easily adjust the clamping gap W of the transported object 300 by changing the gap between the support blocks 51 by rotating the adjustment shaft 52 with the handle 53.

[0032] The pinch conveyor device 1 of this embodiment has a transport conveyor 70 that sends the transported object 300, which has been pinched and transported downstream by the pinch conveyor unit 10, to the weighing device 60 in the downstream direction. The transport conveyor 70 is disposed so that an upper surface 70a is located a predetermined distance below the conveyor belt 14 of the pinch conveyor unit 10. The transport conveyor 70 receives the transported object 300, which has been sent downstream by the pinch conveyor unit 10, on its upper surface 70a, and transports it downstream.

[0033] In this embodiment, as shown in Fig. 6, a case is described in which the pinch conveyor device 1 is provided upstream of the weighing device 60 into which the transported object 300 is carried in the transport direction, but the present invention is not limited to this. For example, the pinch conveyor device 1 in this embodiment may be provided downstream of the weighing device 60 into which the transported object 300 is carried out in the transport direction. In addition, the pinch conveyor device 1 may be provided both upstream of the transported object 300 into which the transported object 300 is carried out in the transport direction and downstream of the transported object 300 out of which the transported object 300 is carried out in the transport direction.

[0034] <Nip conveyor unit> As shown in Fig. 2, the pair of pinch conveyor units 10 in this embodiment have the same configuration. Fig. 3 is a cross-sectional view of the pinch conveyor unit 10 at the position indicated by the arrows III-III in Fig. 2, and shows an enlarged cross-section of only one of the pinch conveyor units 10. The pair of pinch conveyor units 10 have the same configuration and are arranged symmetrically.

[0035] The pinch conveyor unit 10 has a connecting member 16 with an L-shaped cross section fixed to the upper part of the support part 11, and a plate-shaped base member 17 fixed to the connecting member 16. The base member 17 is supported by the support part 11 via the connecting member 16. The support part 11 is disposed at a position opposite to the pinch surface 14a of the conveyor belt 14 in the width direction of the pinch conveyor unit 10.

[0036] When the pinch conveyor device 1 is provided on the upstream side in the conveying direction where the transported object 300 is carried in, the support part 11 is disposed at a position downstream of the longitudinal middle part of the pinch conveyor unit 10. The pinch conveyor unit 10 is supported by the support part 11 at a position downstream of the longitudinal middle part, so that the carry-in conveyor 190 (FIG. 6) for the transported object 300 can be disposed below in the upstream direction. The pinch conveyor unit 10 receives the transported object 300 carried in by the carry-in conveyor 190 by pinching it with the pinch conveyor unit 10, and transports it in the downstream direction.

[0037] When the pinch conveyor device 1 is provided downstream in the conveying direction where the transported object 300 is carried out, the support part 11 is disposed upstream of the longitudinal middle part of the pinch conveyor unit 10. In this case, the pinch conveyor device 1 is disposed so as to deliver the transported object 300 pinched by the pinch conveyor unit 10 to a conveyor disposed below in the downstream direction.

[0038] The base member 17 supports the upper end of the rotating shaft 12a of the drive roller 12 and the upper end of the rotating shaft 13a of the driven roller 13. The lower end of the rotating shaft 12a of the drive roller 12 and the lower end of the rotating shaft 13a of the driven roller 13 are supported by a lower base member 18 fixed to the base member 17. The driving roller 12 and the driven roller 13 rotate in such a manner that the rotating shafts 12a and 13a do not rotate, but the surrounding rollers rotate. In the pinch conveyor unit 10, the driven roller 13 is disposed in the upstream direction, and the driving roller 12 is disposed in the downstream direction.

[0039] A conveyor belt 14 is stretched between the drive roller 12 and the driven roller 13. The conveyor belt 14 is covered by a cover member 40 on the sides other than the clamping surface 14a of the conveyed object 300. The cover member 40 in this embodiment has a first cover member 41 that covers the upstream side of the driven roller 13 and the downstream side of the drive roller 12, and a second cover member 42 that covers the conveyor belt 14 in the opposite direction to the clamping surface 14a. The first cover member 41 and the second cover member 42 are fixed to the base member 17 by bolts 44. The first cover member 41 provided on the upstream side of the driven roller 13 has a guide plate 45 that guides the conveyed object 300 carried in by the carry-in conveyor 190 between the pair of clamping conveyor units 10.

[0040] The pinch conveyor unit 10 is provided with an axis distance adjustment mechanism 20 at the rotating shaft 13a of the driven roller 13, which adjusts the axis distance L between the driven roller 13 and the driving roller 12. The axis distance adjustment mechanism 20 adjusts the axis distance L by moving the rotating shaft 13a of the driven roller 13 in a direction toward or away from the rotating shaft 12a of the driving roller 12.

[0041] <Axle adjustment mechanism> The shaft distance adjustment mechanism 20 has adjustment bolts 21 as adjustment members provided at both ends of the rotating shaft 13a of the driven roller 13, and guide grooves 22 as guide parts provided on the base member 17 and the lower base member 18, which guide both ends of the rotating shaft 13a in the direction in which the shaft distance L between the driving roller 12 and the shafts of the driven roller 13 changes. The rotating shaft 13a of the driven roller 13 has a guide surface 13b that moves along the guide groove 22. The shaft distance adjustment mechanism 20 adjusts the shaft distance L between the driven roller 13 and the driving roller 12 by changing the position of the rotating shaft 13a along the guide groove 22 of the base member 17 with the adjustment bolts 21. The shaft distance adjustment mechanism 20 can adjust the positions of both ends of the rotating shaft 13a of the driven roller 13 independently.

[0042] The pinch conveyor unit 10 does not require a tension roller for the conveyor belt 14 by providing the shaft distance adjustment mechanism 20 on the rotating shaft 13a of the driven roller 13. Therefore, the pinch conveyor unit 10 can arrange the drive motor 15, which rotates the drive roller 12 by the drive belt 15a, close to the support part 11 by a distance X2. In addition, when the pinch conveyor device 1 is provided on the upstream side where the transported object 300 is carried in in the transport direction, the drive motor 15 can be arranged downstream of the middle part in the longitudinal direction of the pinch conveyor unit 10. The pinch conveyor unit 10 can reduce the moment acting on the drive motor 15 with respect to the support part 11 by bringing the drive motor 15 close to the support part 11. The pinch conveyor unit 10 can reduce vibration by reducing the moment of the drive motor 15 acting on the support part 11.

[0043] Furthermore, the width of the pinch conveyor unit 10 can be reduced by eliminating the need for a tension roller for the conveyor belt 14, and the drive motor 15 can be arranged close to the support portion 11, making the unit compact. Making the pinch conveyor unit 10 compact also makes it possible to make the pinch conveyor device 1 more compact.

[0044] Furthermore, the pinch conveyor unit 10 can adjust the tension of the conveyor belt 14 applied between the drive roller 12 and the driven roller 13 to an appropriate state by adjusting the axial distance L between the driven roller 13 and the drive roller 12 at the upper and lower ends. By adjusting the tension at both upper and lower ends, the conveyor belt 14 runs at an appropriate position without meandering.

[0045] When the pinch conveyor device 1 is provided downstream in the conveying direction where the transported object 300 is transported, the drive motor 15 can be disposed upstream of the middle part in the longitudinal direction of the pinch conveyor unit 10. The pinch conveyor unit 10 can be made compact by eliminating the need for a tension roller for the conveyor belt 14, and the drive motor 15 can be disposed close to the support part 11. By making the pinch conveyor unit 10 compact, the pinch conveyor device 1 can be made compact.

[0046] <Upward movement of the clamping conveyor unit> As shown in Fig. 3, the pinch conveyor device 1 of this embodiment can move the pinch conveyor unit 10 upward relative to the support part 11. The support part 11 of this embodiment has a first support part 11A fixed to a support block 51 (Fig. 1) of the pinch gap adjustment mechanism 50 and a second support part 11B fixed to a base member 17 of the pinch conveyor unit 10. The first support part 11A and the second support part 11B are pillar members of the same cross-sectional shape, and are connected by a bending member 30 on the side opposite to the pinch surface 14a in the width direction of the pinch conveyor unit 10. The bending member 30 can be a hinge.

[0047] Also, a guide plate 32 is provided at the lower end of the second support portion 11B along two surfaces of the upper end portion of the first support portion 11A. The guide plate 32 is disposed so as to be perpendicular to the rotation axis 31 of the bending member 30, and has an arc-shaped guide groove 33 at a predetermined position centered on the rotation axis 31. The guide groove 33 is provided at a predetermined angle θ on the guide plate 32 centered on the rotation axis 31. The first support portion 11A has a fixing bolt 34 that engages with the guide groove 33 and fixes the guide plate 32 to the first support portion 11A. The fixing bolt 34 can be a hexagonal bolt, a hexagonal socket bolt, or the like. The fixing bolt 34 can be easily operated without using tools by using, for example, a bolt with a lever. With the fixing bolt 34 loosened, the second support portion 11B can be moved upward within the range of the predetermined angle θ of the guide groove 33 centered on the rotation axis 31.

[0048] In the pinch conveyor 1 of this embodiment, as shown by the solid lines, the first support portion 11A and the second support portion 11B are in vertical contact with the first support portion 11A and are fixed to the guide plate 32 by the fixing bolt 34, so that the first support portion 11A and the second support portion 11B are integrated together. In this state, the pinch conveyor 1 can properly support the pinch conveyor unit 10 in normal operation.

[0049] As shown by the two-dot chain line, the clamping conveyor device 1 can move the second support part 11B and the clamping conveyor unit 10 upward together around the rotation axis 31 of the bending member 30 by loosening the fixing bolt 34. That is, the clamping conveyor unit 10 can move upward by rotating the second support part 11B around the rotation axis 31 of the bending member 30 relative to the first support part 11A. In this state, the clamping conveyor device 1 can be in a state in which a space is formed below the clamping conveyor unit 10. The second support part 11B can be moved stably with the guide plate 32 aligned with the first support part 11A. The second support part 11B can be moved until the end of the guide groove 33 of the guide plate 32 abuts against the fixing bolt 34. When the guide plate 32 is fixed to the first support portion 11A with the fixing bolt 34 at a position where the guide groove 33 abuts against the fixing bolt 34, the second support portion 11B can maintain the clamping conveyor unit 10 in an upwardly moved position.

[0050] In this manner, the pinch conveyor device 1 of this embodiment can move the conveyor belt 14 upward relative to the transport conveyor 70 by moving the pinch conveyor unit 10 upward together with the second support portion 11B relative to the first support portion 11A. This allows a space to be formed between the lower end of the conveyor belt 14 of the pinch conveyor unit 10 and the upper surface 70a of the transport conveyor 70. By forming a space above the transport conveyor 70, it becomes possible to easily clean the transport conveyor.

[0051] <Downward movement of the clamping conveyor unit> As shown in FIG. 3, in the pinch conveyor device 1, the second support portion 11B and the pinch conveyor unit 10 can be moved downward together around the rotation shaft 31 of the bending member 30 by loosening the fixing bolt .

[0052] This allows the pinch conveyor unit 10 to be returned to its original state together with the second support portion 11B. By returning the pinch conveyor unit 10 to its original state, the pinch interval W also returns to the original set width. Therefore, the pinch interval W does not need to be reset by the pinch interval adjustment mechanism 50, or can be returned to the original interval with only minor adjustment.

[0053] <Configuration of shaft distance adjustment mechanism> 4, the guide groove 22 of the shaft distance adjustment mechanism 20 has an opening 24 that opens the top side of the adjustment bolt 21. The adjustment bolt 21 of the shaft distance adjustment mechanism 20 is screwed into a female thread portion 25 provided on the rotating shaft 13a, and its tip portion abuts against the deepest portion 23 of the guide groove 22. The head 21a of the adjustment bolt 21 is rotatable from the direction of the opening 24. For example, a hexagonal socket bolt can be used as the adjustment bolt 21, and the head 21a can be rotated from the direction of the opening 24 using a hexagonal wrench.

[0054] 5, when the adjustment bolt 21 is screwed in, the rotation shaft 13a of the driven roller 13 moves along the guide groove 22 in a direction away from the drive roller 12. When the adjustment bolt 21 is loosened, the rotation shaft 13a of the driven roller 13 moves along the guide groove 22 in a direction toward the drive roller 12. In this way, the axis distance adjustment mechanism 20 can easily adjust the axis distance L1 between the drive roller 12 and the driven roller 13 to an axis distance L2, etc. by changing the screwing direction and screwing amount of the adjustment bolt 21.

[0055] As shown in FIG. 4 and FIG. 5, when the pinch conveyor 1 is provided on the upstream side of the weighing device 60 into which the transported object 300 is carried in the transport direction, the first cover member 41 covering the upstream side of the driven roller 13 is provided with an open portion 43 that does not block the upper side of the guide groove 22 provided in the base member 17. The open portion 43 is designed not to block the side of the opening 24 of the base member 17. This open portion 43 allows the adjustment bolt 21 provided on the rotating shaft 13a of the driven roller 13 to be easily rotated without removing the first cover member 41. When the pinch conveyor 1 is provided on the downstream side of the weighing device 60 into which the transported object 300 is carried in the transport direction, the first cover member 41 is provided so as to cover the downstream side of the driven roller 13. In this case, the configuration of the first cover member 41 provided on the base member 17 is the same as that described above, and therefore the description thereof will be omitted.

[0056] Furthermore, when the pinch conveyor device 1 is provided upstream of the weighing device 60 into which the transported object 300 is carried in the transport direction, the adjustment work of the adjustment bolt 21 provided on the rotation shaft 13a of the driven roller 13 is performed from the upstream side of the pinch conveyor unit 10, and can be easily performed from the open portion in the direction in which the carry-in conveyor 190 (FIG. 6) is provided. When the pinch conveyor device 1 is provided downstream of the weighing device 60 into which the transported object 300 is carried in the transport direction, the adjustment work of the adjustment bolt 21 provided on the rotation shaft 13a of the driven roller 13 is performed from the downstream side of the pinch conveyor unit 10, and can be easily performed from the open portion without removing the first cover member 41.

[0057] <Weighing system equipped with a clamping conveyor device> As shown in Fig. 6, a weighing system 2 equipped with a clamping conveyor device 1 can reduce vibrations of the clamping conveyor device 1, thereby enabling the clamping conveyor device 1 and the weighing device 60 to use a single platform 75. Even if the platform 75 is shared, the vibrations of the clamping conveyor device 1 do not affect the weight measurement of the transported object 300 by the weighing device 60. Using a single platform 75 makes it possible to make the weighing system 2 more compact. Making the weighing system 2 more compact makes it possible to reduce equipment costs, transportation costs, and the like.

[0058] The weighing system 2 has a control device 80 that controls the operation of the clamping conveyor device 1 and the weighing device 60. The control device 80 controls the transport conveyor 70 of the clamping conveyor device 1 to have the same feed speed as the weighing conveyor 61. The control device 80 spreads the individual transported objects 300 at predetermined intervals in the clamping conveyor unit 10 and places them on the transport conveyor 70 so that they can be transported by the weighing conveyor 61. The control device 80 has a processor, a volatile memory, a non-volatile memory, an I / O interface, etc. The control device 80 controls the operation of the drive motor 15 of the clamping conveyor device 1 and the transport conveyor 70. The weighing device 60 controls the operation of the weighing conveyor 61 and measures the weight of the transported objects 300 passing on the weighing conveyor 61.

[0059] <Other embodiments> In the above embodiment, the configuration in which the pinch conveyor unit 10 of the pinch conveyor device 1 can move upward has been described, but the pinch conveyor unit 10 may not move upward. The present application may be modified in various ways without departing from the spirit and scope of the present invention, and is not limited to the above embodiment.

[0060] Furthermore, the above-described embodiment shows one example, and the clamping conveyor device 1 may be provided in a device other than the weighing system 2. The clamping conveyor device 1 can be used in, for example, a system in which the objects 300 need to be conveyed at predetermined intervals, and the present application is not limited to the above-described embodiment.

[0061] <Summary> In the above-mentioned pinch conveyor device 1, the drive motor 15 of the pinch conveyor unit 10 is brought closer to the support part 11 to reduce the moment acting on the support part 11, thereby making it possible to reduce vibration of the pinch conveyor device 1. By reducing the vibration in the pinch conveyor device 1, the weighing device 60 can be provided on the same frame 75. By using only one frame 75, the weighing system 2 can be made compact. By making the weighing system 2 compact, it is possible to reduce the equipment cost, transportation cost, etc. [Explanation of symbols]

[0062] 1. Clamping conveyor device 2. Weighing System 10. Clamping conveyor unit 11 Support part 11A 1st support part 11B 2nd support part 12 Drive roller 13 Driven roller 13a Rotation axis 13b Guide surface 14 Conveyor Belt 14a Clamping surface 15 Drive motor 17 Base material 18 Lower base member 20 Axis adjustment mechanism 21 Adjustment bolt (adjustment part) 21a Head 22 Guide groove (guide part) 24 Opening 30 Bending member 31 Rotating shaft 32 Guide plate 33 Guide groove 34 Fixing bolt 40 Cover member 41 First cover member 43 Open area 50 Clamping interval adjustment mechanism 51 Support block 60 Weighing device 61 Weighing Conveyor 70 Transport Conveyor 75 racks 300 items to be transported X2 Distance θ Angle

Claims

1. A pinch conveyor device having a pair of pinch conveyor units that pinch opposing portions of a conveyed object, and a support portion that supports each of the pair of pinch conveyor units, Each of the pair of nipping conveyor units has A base member supported by the support portion; a drive roller and a driven roller whose rotation shafts are supported by the base member; a conveyor belt stretched between the drive roller and the driven roller; A drive motor that rotates the drive roller, The support portion is disposed at a position opposite to a clamping surface in a width direction of the pair of clamping conveyor units, The pinch conveyor device, wherein the driven roller is provided with an axial distance adjustment mechanism that adjusts the axial distance between the driven roller and the drive roller between the base member and the driven roller in the longitudinal direction of the pair of pinch conveyor units.

2. 2. The nip-conveyor device according to claim 1, wherein the support portion and the drive motor are disposed upstream or downstream of a longitudinal intermediate portion of the pair of nip-conveyor units.

3. 3. The pinch conveyor device according to claim 1, wherein the shaft distance adjustment mechanism comprises: a guide portion provided on the base member for guiding both ends of the rotating shaft of the driven roller in a direction in which the shaft distance with the drive roller changes; and an adjustment member provided on both ends of the rotating shaft for changing a position of the rotating shaft relative to the base member along the guide portion.

4. the adjustment member is an adjustment bolt whose tip portion abuts against the base member when screwed into threaded portions provided at both ends of the rotation shaft, 4. The pinch conveyor device according to claim 3, wherein the guide portion has an opening that opens to a top side of the adjustment bolt.

5. the base member includes a cover member that covers a side of the conveyor belt other than a surface that holds the transported object, 5. The pinch-conveyor device according to claim 4, wherein the cover member has an opening at the opening portion.

6. a clamping interval adjustment mechanism for adjusting a clamping interval of the transported object in a short side direction by the pair of clamping conveyor units, 2. The clamping conveyor device according to claim 1, wherein the clamping gap adjustment mechanism includes a pair of support blocks supporting each of the support portions, an adjustment shaft for moving the pair of support blocks in a direction narrowing the clamping gap or in a direction widening the clamping gap, and a handle for rotating the adjustment shaft.

7. A pinch conveyor device according to claim 1, 2 or 6; a transport conveyor that transports the object transported by the pair of pinch conveyor units in a downstream direction; a weighing device having a weighing conveyor that weighs the objects fed by the transport conveyor, A weighing system, wherein the clamping conveyor device, the transport conveyor, and the weighing device are mounted on an integrally formed platform.

8. 8. The weighing system according to claim 7, wherein the clamping conveyor device is provided at least one of an upstream side, in a conveying direction, where the transported objects are carried in relative to the weighing device, and a downstream side, in a conveying direction, where the transported objects are carried out.

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