JP6305767B2 - Conveyor and weighing device - Google Patents

Description

  The present invention relates to a transport conveyor and a weighing device including the same.

  As a conveyor for use in a weighing device, for example, as shown in Patent Document 1, a wide conveyor belt is wound around a drive pulley and a driven pulley formed in a roller shape, and a support shaft of the drive pulley. Are fitted and supported from their open ends into groove-like engaging recesses formed respectively at the downstream end portions of the both side walls of the conveyor frame in the conveying direction.

JP 2010-37073 A

  The weighing device is used in various applications. For example, when used in a food weighing application, it is necessary to frequently clean the conveyor of the weighing device for hygiene management. In this case, the conveyor belt may be removed. At this time, as in Patent Document 1, the both ends of the drive pulley support shaft are groove-like engagements provided at the ends in the conveying direction of both side walls of the conveyor frame. By adopting a shaft support structure that is inserted and supported in the combined recess, the drive pulley can be easily attached and detached without using a tool or the like, which is advantageous in terms of handling.

  However, if both ends of the spindle of the drive pulley are simply inserted into and supported by the engagement recesses of the conveyor frame, the drive pulley will self-weight when inadvertently tilting the conveyor frame with the conveyor belt removed. There is a risk that it will fall out of the engaging recess. In particular, when the driving pulley is made of stainless steel and has a large weight, the driving pulley is more easily dropped.

  Further, in a transport conveyor used as a weighing conveyor of a weighing device, the dynamic balance of the drive pulley is adjusted in advance, and if the drive pulley dropped from the engagement recess falls on the floor surface, the impact is Therefore, deformation and scratches occur and the dynamic balance is lost, which adversely affects weight measurement. Furthermore, the drive pulley mounted on the conveyor frame needs to be firmly fixed in order to prevent generation of drive vibration and drive noise.

  Therefore, in Patent Document 1, a minute ridge is formed on the inner surface on the inlet side of the engagement recess for inserting and supporting both ends of the spindle of the drive pulley, and the spindle end is engaged by overcoming this ridge. The drive pulley is prevented from inadvertently falling off by being inserted into the recess.

  However, since the above-mentioned bulging portion is intended to prevent dropping by abutting against the end portion of the spindle of the drive pulley, depending on the processing accuracy of the bulging portion, there is a minute gap between the end portion of the spindle and the bulging portion. There are problems such as driving vibration and driving noise caused by gaps. For this reason, it is necessary to form a raised part with high precision, and there exists a subject that the processing cost for forming a raised part rises.

  In addition, even if the end of the support shaft and the raised portion are in proper contact with each other at the beginning, the raised pulley is worn away by repeatedly removing the drive pulley, and a gap is generated between the end of the support shaft and the raised portion. In addition, the drive pulley drop-off preventing function itself is also lowered, and the desired function cannot always be maintained for a long time.

  The present invention has been made by paying attention to such a situation, and is capable of easily removing the pulley from the conveyor frame, while preventing the pulley from inadvertently falling off the conveyor frame. It is an object of the present invention to provide a transport conveyor capable of maintaining the temperature for a long time and a weighing device equipped with the transport conveyor.

  In order to achieve the above object, the present invention is configured as follows.

(1) The transport conveyor of the present invention includes a pair of pulleys positioned on both sides of the transport direction, a conveyor frame to which the pair of pulleys are attached, and a transport belt wound around the pair of pulleys. A transport conveyor comprising:
One pulley of the pair of pulleys includes a support shaft and a cylindrical shaft-shaped pulley body rotatably supported by the support shaft, and both protrusions of the support shaft protruding from both ends of the pulley body. Forming an engagement shaft end portion having a flat engagement surface on the outer periphery,
An engagement recess having a flat engagement surface that engages with the flat engagement surface of the support shaft of the one pulley is formed on both shaft support portions provided on both sides on one end side in the transport direction of the conveyor frame,
The engagement direction between the flat engagement surface of one end of the engagement shaft on the support shaft and the flat engagement surface of the one engagement recess engaged with the engagement shaft, and the other engagement shaft end of the support shaft There is an angle difference between the engagement direction of the flat engagement surface and the flat engagement surface of the other engagement recess engaged therewith.

  According to the present invention, when inserting and supporting the engagement shaft end portions at both ends of the support shaft of one pulley in the engagement recesses of both shaft support portions of the conveyor frame, the engagement portions at both ends of the support shaft are engaged. Since the angle of the direction is shifted, both end portions of the engagement shafts are press-fitted into the engagement recesses while the shaft support portions are distorted. In the state of being press-fitted in this manner, the torsional stress acts on the support shaft due to the elastic restoring force of the strained and deformed shaft support portion, and the flat engagement surfaces in both engagement recesses and the flat shapes at both engagement shaft end portions. Each of the engagement surfaces is forcibly pressed.

  In this way, the flat engagement surfaces in both engagement recesses and the flat engagement surfaces at both engagement shaft end portions are forcibly pressed to bring frictional resistance to the press contact portion, and the support shaft is moved from the engagement recess. The escape is suppressed. Therefore, when the conveyor frame with the conveyor belt removed is removed, even if the conveyor frame is inadvertently tilted slightly so that one of the pulleys is on the lower side, one of the pulleys is pulled out of the shaft support by its own weight. This is prevented.

  In addition, friction between the flat engagement surface of the engagement shaft end and the flat engagement surface of the engagement recess provides frictional resistance that prevents the drive pulley from falling off its own weight. There is almost no wear on the engagement surface, which is the occurrence location, and the drop-off prevention function is exhibited over a long period of time.

  (2) In a preferred embodiment of the present invention, the pair of pulleys includes a driving pulley located on one side along the conveying direction and a driven pulley located on the other side, and the one pulley is the driving pulley. It is a pulley.

  According to this embodiment, the drive pulley can be easily attached to and detached from the conveyor frame, while the tension of the conveyor belt can be adjusted by adjusting the position of the driven pulley.

(3) In another embodiment of the present invention, the engaging direction of the flat engaging surface of one of the engaging recesses in both the shaft support, the engagement direction of the flat engaging face of the other engagement recess In the same direction, and there is an angle difference between the engagement direction of the flat engagement surface at one end of the engagement shaft and the engagement direction of the flat engagement surface at the end of the other engagement shaft. is there.

  According to this embodiment, in the step of cutting the both ends of the support shaft to form the engagement shaft end portion having the flat engagement surface, after processing one of the engagement shaft end portions, the support shaft is predetermined. By rotating the angle of the other engagement shaft and turning the other end of the engagement shaft, desired engagement shaft ends exhibiting a retaining function can be formed at both ends of the support shaft.

(4) In still another embodiment of the present invention, the engagement direction of the flat engagement surface of one engagement shaft end portion of the support shaft and the flat engagement surface of the other engagement shaft end portion are and an engaging direction and the same direction, the engaging direction of the flat engaging surface of one of the engaging recesses in both the shaft support, in the direction of engagement of the flat engaging surface of the other of said engaging recess There is an angle difference.

  According to this embodiment, the same cutting process is performed on both ends of the support shaft to form engagement shaft end portions of the same specification, and only the shaft support portion on the conveyor frame side needs to be slightly modified.

   (5) The weighing device of the present invention comprises the transport conveyor of the present invention and a weighing means for weighing the object to be weighed transported by the transport conveyor.

  According to the present invention, the handling property of the transfer conveyor which is a weighing conveyor is improved, and the maintenance property such as a cleaning operation can be improved.

  Thus, according to the present invention, one pulley can be easily attached to and detached from the conveyor frame without a tool, but a situation in which the pulley is inadvertently detached from the conveyor frame and falls is unforeseen. Can be avoided.

FIG. 1 is an overall perspective view of a weighing device according to an embodiment of the present invention. FIG. 2 is a plan view of the weighing conveyor. FIG. 3 is a perspective view showing a state where the belt of the weighing conveyor is removed. FIG. 4A is a cross-sectional plan view of the drive pulley, and FIG. 4B is a plan view in which a portion of the driven pulley is cut away. FIG. 5 is a perspective view of (a) a driving pulley and (b) a driven pulley. FIG. 6 is a cross-sectional plan view of a shaft support portion in the drive pulley. FIG. 7 is a side view illustrating a shaft support portion of the drive pulley for comparison. FIG. 8 is a plan view showing the support structure of the driven pulley. FIG. 9 is a plan view showing a state in which the support of the driven pulley is released. 10 is a cross-sectional view taken along the line AA in FIG. FIG. 11 is a longitudinal side view of the driven pulley supporting structure moved upward. FIG. 12 is a perspective view of the driven pulley support structure. FIG. 13 is a perspective view of the support structure of the driven pulley. FIG. 14 is a side view for explaining another embodiment of the shaft support portion in the drive pulley.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an entire weighing apparatus according to an embodiment of the present invention. In this embodiment, description will be made by applying to a weight sorter as a weighing device. This weight sorter is used, for example, by being installed in the middle of an object transportation line, etc., and includes a weighing conveyor 1 that is a conveyor, a carry-in conveyor 2 that carries objects to be weighed into the weighing conveyor 1, and a load cell. A load measuring unit 3 as a weighing means including a load sensor such as an operation setting display 4 for performing various settings such as a boundary weight value for weight selection and displaying a measurement result, etc. It is equipped with the installed base 5. The weighing conveyor 1 includes a pair of pulleys of a driving pulley 7 and a driven pulley 8, and a conveyor belt 9 is wound around the pulleys 7 and 8.

  In this weight sorter, the objects to be weighed supplied to the carry-in conveyor 2 are transferred to the weighing conveyor 1 and conveyed, and the weight of the entire weighing conveyor 1 including the objects to be weighed is measured during this conveyance. To determine the weight of the object to be weighed, and determine whether the weight of the object to be weighed is, for example, “light”, “appropriate”, or “excess”. Sort by sorting (not shown).

  The weighing conveyor 1 and the carry-in conveyor 2 are basically configured in the same structure, and only the weighing conveyor 1 will be described in detail below.

  FIG. 2 shows a plan view of the weighing conveyor 1. This weighing conveyor 1 is a roller-like driving pulley 7 that is horizontally supported on the lower side in the conveying direction, which is the rear side (right side in FIG. 2) of the conveyor frame 6 made of stainless steel plate, and the front side of the conveyor frame 6. A wide conveyor belt 9 is wound around a roller-like driven pulley 8 that is horizontally supported on the upper side in the conveyance direction, and the entire weighing conveyor 1 is loaded as shown in FIG. It is configured to be detachable from the movable frame 3a of the measuring unit 3, and can be connected and fixed to the buckle-type hanging bracket 10 of the movable frame 3a by left and right receiving brackets 10a.

  As shown in FIGS. 2 and 3, the conveyor frame 6 is made of, for example, a stainless steel plate, and is refracted downward along the top plate portion 6 a that slide-guides the conveyance belt 9 and the left and right sides thereof. A pair of left and right side plate portions 6b is provided. And, as shown in FIG. 2, a driving pulley 7 as one pulley is horizontally supported at the rear end portion of the side plate portion 6b so as to be driven to rotate, and a driven pulley 8 of the front end portion of the side plate portion 6b is provided. It is supported horizontally so that it can freely rotate. In addition, the receiving metal fitting 10a for the buckle-type metal fitting 10 provided in the movable frame 3a of the load measuring unit 3 is provided on the outer surfaces of the left and right side plate parts 6b.

  A drive motor (not shown) is provided below an extended portion 6 c provided on one side of the rear side of the conveyor frame 6 (upper right side in FIG. 2), and one end of the drive motor and the drive pulley 7. The toothed pulley 11 provided in the part is wound and interlocked via the toothed belt 12 without slipping.

  As shown in FIG. 2, an annular ridge 9 a along the belt circumferential direction is integrally formed on the inner circumferential surface of the conveyor belt 9 over the entire belt circumference, and the drive pulley 7 and the driven pulley 8 are By engaging the protrusions 9a with the guide grooves 13, 14 formed on the outer peripheral surface, the left and right meandering of the rotating conveyor belt 9 is prevented. In addition, the protrusion 9a and the guide grooves 13 and 14 are provided in one place deviated from the longitudinal center of the drive pulley 7 and the driven pulley 8, and the drive pulley 7, the driven pulley 8, And the conveyance belt 9 is assembled | attached by right and left fixed direction.

  In addition, the conveyor frame 6 is divided into left and right, and is connected by horizontal longitudinal ribs 6d at a plurality of locations in the conveyance direction, and between the opposed inward ends of the left and right top plate portions 6a, the conveyance belt. A running groove 15 in which the nine protrusions 9a move is formed.

  4A and 4B are a cross-sectional plan view of the drive pulley 7 and a plan view crossing a part of the driven pulley 8, and FIGS. 5A and 5B show the drive pulley 7. And the external perspective view of the driven pulley 8 is each shown.

  The driving pulley 7 includes a cylindrical roller body 16, a support shaft 17 inserted through the cylindrical roller body 16, a pair of left and right bearings 18 fitted and mounted between the roller body 16 and the support shaft 17, and an inner fit to one end of the roller body 16. The cap 19 also serves as a bearing retainer that is connected and fixed, and the toothed pulley 11 that is also fitted and fixed to the other end of the roller body 16 to serve as a bearing retainer.

  Similarly, the driven pulley 8 has a cylindrical roller body 21, a support shaft 22 inserted through the roller body 21, a pair of left and right bearings 23 fitted and mounted between the roller body 21 and the support shaft 22, and the roller body 21. And a cap 24 serving as a bearing retainer that is internally fitted and connected to both ends.

  The support shaft 17 of the drive pulley 7 is supported so as to be non-rotatable horizontally in the left-right direction as follows over a pair of left and right shaft support portions 25a, 25b provided at the rear ends of the left and right side plate portions 6b of the conveyor frame 6.

  As shown in FIG. 6, the shaft support portions 25 a and 25 b are formed in vertical plate-like rearward cantilever portions that are bent and bent in a crank shape from a rear end portion of the side plate portion 6 b in the conveyor frame 6. Engaging recesses 26a and 26b are formed in the middle of the upper and lower portions of the shaft support portions 25a and 25b so as to open rearward.

  A pair of flat engagement surfaces s are cut at opposite ends of the support shaft 17 protruding from both ends of the drive pulley 7 so as to face each other at a predetermined interval in parallel, and an end portion of the engagement shaft having an oval cross-sectional shape. 17a and 17b are formed. The engagement recesses 26a and 26b provided in the left and right shaft support portions 25a and 25b of the conveyor frame 6 have a pair of upper and lower flat engagement surfaces f having a vertical interval equal to the facing interval between the pair of flat engagement surfaces s. Is formed.

Therefore, as shown in FIG. 3, when the drive pulley 7 is approached from the rear to the shaft support portions 25a and 25b, the upper and lower flat engagement surfaces s at the left and right engagement shaft end portions 17a and 17b By inserting the engaging shaft end portions 17a and 17b to the deep ends of the engaging recesses 26a and 26b so as to engage with the flat engaging surfaces f that are vertically opposed to each other at 26a and 26b, the drive pulley 7 is The left and right shaft support portions 25a and 25b are supported in a predetermined horizontal posture and positioned right and left.

  The intermediate crank portion 25c of each of the shaft support portions 25a and 25b is refracted laterally with its plate thickness directed in the transport direction (front-rear direction), and the rearward outer surface of the intermediate crank portion 25c is each engaging recess 26a. , 26b. Accordingly, the circular outer peripheral surfaces of the engagement shaft end portions 17a and 17b inserted into the engagement recesses 26a and 26b are abutted and supported via a contact line long in the axial direction on the rearwardly facing outer surface of the intermediate crank portion 25c. .

  Here, as shown in FIG. 7, the engaging recesses 26a, 26b in the left and right shaft support portions 25a, 25b are formed so that the engaging directions (opening directions) are the same in the front-rear horizontal direction. Thus, a slight angle difference between the engagement direction of the flat engagement surface s of one engagement shaft end 17a of the support shaft 17 and the engagement direction of the flat engagement surface s of the other engagement shaft end 17b. α (for example, about 0.5 to 1.0 degree) is given. Note that the angle difference α in FIG. 7 is shown enlarged and exaggerated.

  Therefore, when the drive pulley 7 is inserted and supported on the left and right shaft support portions 25a and 25b, the engagement directions at the left and right engagement portions are shifted by the angle difference α, so the left and right shaft support portions 25a and 25b are slightly moved. The left and right engagement shaft ends 17a and 17b are press-fitted into the left and right engagement recesses 26a and 26b, respectively, while being distorted. In the press-fitted state in this way, torsional stress acts on the support shaft 17 by the elastic restoring force of the deformed shaft support portions 25a and 25b, and the flat engagement surfaces f in the left and right engagement recesses 26a and 26b, The flat engagement surfaces s of the left and right engagement shaft end portions 17a and 17b are forcibly pressed into contact with each other.

  As described above, the flat engagement surfaces f in the left and right engagement recesses 26a and 26b and the flat engagement surfaces s in the left and right engagement shaft end portions 17a and 17b are forcibly pressed to each other so that a large frictional resistance is applied to the press contact portion. This prevents the support shaft 17 from coming out of the engagement recesses 26a and 26b. Accordingly, when the conveyor frame 6 with the conveyor belt 9 removed is removed from the load measuring unit 3, the conveyor frame 6 is carelessly tilted so that the rear end side (drive pulley side) is downward. However, the drive pulley 7 is prevented from being detached from the shaft support portions 25a and 25b by its own weight.

  Further, the friction resistance is large as a whole due to the friction caused by the four engagements between the pair of flat engagement surfaces s of the engagement shaft end portions 17a and 17b and the pair of flat engagement surfaces f of the engagement recesses 26a and 26b. Therefore, the pressure contact at each engagement point may not be particularly strong. As a result, even if the drive pulley 7 is repeatedly detached and attached, there is almost no wear at the engagement portion, and the function of preventing the drive pulley 7 from falling off is exhibited over a long period of time.

  For cleaning and maintenance, after removing the weighing conveyor 1 from the load measuring unit 3, the driven pulley 8 is moved closer to the driving pulley 7 to loosen the conveying belt 9 as described later, and the conveying belt 9 is loosened. It can be easily removed by simply pulling out 9 laterally and pulling the driving pulley 7 supported by the left and right shaft support portions 25a, 25b strongly and backward.

  8 is a plan view showing the support structure of the driven pulley 8, FIG. 9 is a plan view showing a state in which the support is released, FIG. 10 is a cross-sectional view taken along the line AA in FIG. FIG. 12 and FIG. 13 are perspective views of the main part of the supporting structure of the driven pulley 8 in a state in which the structure is moved upward.

  Based on these drawings, the structure for supporting the driven pulley 8 at both the left and right ends will be described.

  Engagement shaft end portions 22a cut into an oval cross-sectional shape are formed at the left and right end portions of the support shaft 22 protruding from both ends of the driven pulley 8, and the engagement shaft end portions 22a serve as conveyors. The support member 31 mounted on the side plate portion 6b of the frame 6 is supported so as not to rotate.

  The support member 31 is made of a stainless steel plate, and the rear portion thereof is arranged in a vertical posture along the inner side of the side plate portion 6b. A connecting shaft 32 with a head extends from the outer side across the side plate portion 6b and the support member 31. It is inserted. On the insertion end side of the connecting shaft 32, a coil spring 33 is inserted and supported by a nut 34 so as to be prevented from coming off. The support member 31 is pressed and supported in an attitude along the inner side of the side plate portion 6b by the elasticity of the coil spring 33. The Moreover, the force which press-supports the supporting member 31 to the side plate part 6b can be adjusted by adjusting the nut 34 and adjusting the compression amount of the coil spring 33.

  A long rectangular engagement hole 35 is formed in the front part of the support member 31 in the front and rear, and the engagement shaft end part 22a of the support shaft 22 in the driven pulley 8 is not rotatable. It is inserted and supported so that it can move back and forth. The left and right support members 31 are engaged with both engaging shaft end portions 22a of the support shaft 22, whereby the support shaft 22 is prevented from moving left and right, and the driven pulley 8 is positioned in the axial direction.

  Guide pieces 31a and 31b are refracted inwardly on the upper and lower sides of the support member 31, and detachment pawls 31c and 31d are refractively connected to the front ends of the guide pieces 31a and 31b. The pressing member 36 positioned up and down by the guide pieces 31a and 31b and prevented from inwardly moving by the locking stoppers 31c and 31d can be moved back and forth along the inner surface of the support member 31, and the locking stopper claw. 31c and 31d are mounted in a state where forward movement beyond a certain forward position is restricted and restricted.

  The pressing member 36 is also made of a stainless steel plate, and its rear part is refracted inward and is formed in an L shape in plan view. A forward U-shaped opening 37 that engages with the circular peripheral portion of the support shaft 22 is provided at the front end of the pressing member 36, and a spring is provided on the rear surface of the refracting piece 36 a provided at the rear of the pressing member 36. The receiving member 38 is screwed.

  On the other hand, a bend 31e protruding inward is also provided at the rear part of the support member 31, and a screw shaft 40 that is screwed in the front-rear direction and is fastened and fixed by a lock nut 39 is attached to the bend piece 31e. . A spring receiving member 41 is engaged and supported at the front end of the screw shaft 40, and a large-diameter coil spring 42 is moderately compressed across the spring receiving portion 38 of the pressing member 36 and the spring receiving member 41 of the supporting member 31. The pressing member 36 is slid forwardly biased by the elastic force of the coil spring 42, and the support shaft 22 engaged with the pressing member 36 is pressed forward to wind around the driven pulley 8. An automatic tension structure that tensions the conveyor belt 9 forward is configured.

  Here, in the left and right support structures, the elastic force of the left and right coil springs 42 can be adjusted separately by rotating the screw shaft 40 and adjusting the position of the spring receiving member 41 back and forth. Automatic tension can be applied to the left and right uniformly with a desired tension.

  From the upper end of the refracting piece 31 e of the support member 31, a tongue piece 31 f that enters below the top plate portion 6 a of the conveyor frame 6 is refracted and extended. A contact screw 44 is attached to the 31f piece as a contact member that is screwed up and down and is fastened and fixed by a lock nut 43. The upper end of the contact screw 44 is attached to the lower surface of the top plate portion 6a. By abutting, the support member 31 supporting the driven pulley 8 on the front end side and having a heavy front portion is prevented from rotating in the forward downward direction around the connecting shaft 32, and a contact screw By adjusting the amount of protrusion 44, the posture of the support member 31 around the connecting shaft 32 is changed, and the height position of the driven pulley 8 can be changed and adjusted separately for the left and right. That is, the height of the front end of the weighing conveyor 1 and the right / left inclination can be adjusted.

  When the support member 31 pressed and supported on the inner surface of the side plate portion 6b in the conveyor frame 6 by the coil spring 33 applies a large external force laterally outward at the front end side thereof, as shown in FIG. The contact point p with the front end of the portion 6b is turned laterally outward with the contact point p as a fulcrum. At this time, the rear portion of the support member 31 is separated from the side plate portion 6b with respect to the inclined connecting shaft 32 in a state where the inward movement is prevented by the contact between the head portion 32a and the outer surface of the side plate portion 6b. The coil spring 33 is compressed and deformed by tilting in the direction.

  In this manner, the front portion of the support member 31 is inclined and opened laterally outward, so that the support portion 31 and the pressing member 36 are removed from the support shaft 22 and the driven pulley 8 can be removed. In this case, the pressing member 36 that is released from the support shaft 22 and is free to move is urged and slid forward until it is received by the locking claws 31c and 31d.

  The support member 31 is connected and supported in a posture along the side plate portion 6b by the connection shaft 32, and is prevented from rotating in the forward and downward direction by the contact screw 44. Therefore, as shown in FIG. The support member 31 can be swung up and rotated about the shaft 32 as a fulcrum. When the support portion 31 is swung up and rotated, the pulley interval is reduced and the conveyor belt 9 is loosened. In response to this, the pressing member 36 urges and advances forward so as to absorb the loosening. After moving to the forward movement limit that is received by the slip-off preventing claws 31c and 31d, the support member 31 is further swung up and rotated, so that the pulley interval can be further narrowed and the conveying belt 9 can be greatly loosened. Thereby, the conveyor belt 9 can be easily removed from the side of the conveyor frame 6. When the pressing member 36 has moved to the forward movement limit, the support shaft 22 does not receive the forward pressing force from the pressing member 36, and the driven pulley 8 supports the left and right without dropping off both ends of the support shaft 22. It is in a state where it is engaged and supported by the member 31 so as to be able to move back and forth a little, and the front portion of the support member 31 can be easily detached from the support shaft 22 by tilting laterally outward.

(Other embodiments)
The present invention can also be implemented in the following forms.

  (1) In the above embodiment, the direction of the flat engagement surface f of the engagement recesses 26a and 26b in the left and right shaft support portions 25a and 25b is the same as the front and rear horizontal direction. The direction of the flat engagement surface s of the combined shaft end portion 17a and the direction of the flat engagement surface s of the other engagement shaft end portion 17b are different from each other by a slight angle α. As shown in FIG. 14, the direction of the flat engagement surface s of the left and right engagement shaft end portions 17a and 17b in the support shaft 17 is the same direction, the direction of the flat engagement surface f in the one shaft support portion 25a and the other Even in a structure in which the direction of the flat engagement surface f in the shaft support portion 25b is made to differ by a slight angle α, a function equivalent to that of the above embodiment can be provided.

  (2) The cross-sectional shapes of the engagement shaft end portions 17a and 17b formed at both ends of the support shaft 17 are prevented from rotating by engagement with the flat engagement surfaces f of the engagement recesses 26a and 26b, and are flat. Any non-circular shape can be used as long as it can slide back and forth along the engagement surface f. For example, a D shape having one flat engagement surface s on the outer periphery, or a pair The flat engagement surface s can be made into a rectangular shape facing each other.

  (3) In the above embodiment, the shaft support portions 25a and 25b are formed in the vertical plate portion extending from the side plate portion 6a of the conveyor frame 6, and the engagement shaft end portions 17a and 17b of the support shaft 17 are connected to the shaft support portion 25a, Although the shaft support portions 25a and 25b are distorted and deformed to cause torsional stress on the support shaft when they are press-fitted into the engagement recesses 26a and 26b of 25b, the shaft support portions 25a and 25b are cut from a metal block. It can also be set as the structure connected with the conveyor frame 6 as another processed part.

  (4) Although the above embodiment has been described by applying to the drive pulley 7, the present invention may be applied not only to the drive pulley but also to a driven pulley.

1 Conveyor (metering conveyor)
DESCRIPTION OF SYMBOLS 3 Load measuring part 6 Conveyor frame 6a Top plate part 6b Side plate part 7 Drive pulley 8 Driven pulley 9 Conveying belt 16 Pulley main body 17 Support shaft 17a Engagement shaft end part 17b Engagement shaft end part 25a Axle support part 25b Axle support part 25c Intermediate crank Part 26a engagement recess 26b engagement recess s flat engagement surface f flat engagement surface α angular difference

Claims (5)

A transport conveyor comprising a pair of pulleys located on both sides along the transport direction, a conveyor frame to which the pair of pulleys are attached, and a transport belt wound around the pair of pulleys,
One pulley of the pair of pulleys includes a support shaft and a cylindrical shaft-shaped pulley body rotatably supported by the support shaft, and both protrusions of the support shaft protruding from both ends of the pulley body. Forming an engagement shaft end portion having a flat engagement surface on the outer periphery,
An engagement recess having a flat engagement surface that engages with the flat engagement surface of the support shaft of the one pulley is formed on both shaft support portions provided on both sides on one end side in the transport direction of the conveyor frame,
The engagement direction between the flat engagement surface of one end of the engagement shaft on the support shaft and the flat engagement surface of the one engagement recess engaged with the engagement shaft, and the other engagement shaft end of the support shaft There is an angular difference between the flat engagement surface and the engagement direction of the flat engagement surface of the other engagement recess engaged with the flat engagement surface.
Conveyor conveyor characterized by that. The pair of pulleys includes a driving pulley located on one side along the conveying direction and a driven pulley located on the other side, and the one pulley is the driving pulley.
The transport conveyor according to claim 1. The engaging direction of the flat engaging surface of one of the engaging recesses in both the shaft support and the engagement direction of the flat engaging surface of the other engagement recess as the same direction,
There is an angular difference between the engagement direction of the flat engagement surface at one end of the engagement shaft and the engagement direction of the flat engagement surface at the other end of the engagement shaft.
The conveyance conveyor of Claim 1 or 2. Engaging direction of the flat engaging surface of one of the engaging shaft end portion of the support shaft, and an engagement direction of the flat engaging surface of the other of the engaging shaft end and the same direction,
There is an angle difference between the engagement direction of the flat engagement surface of one of the engagement recesses in the both shaft support portions and the engagement direction of the flat engagement surface of the other engagement recess,
The conveyance conveyor of Claim 1 or 2 . The transport conveyor according to any one of claims 1 to 4, and a weighing means for weighing the weight of an object to be weighed transported by the transport conveyor.
A weighing device characterized by that.

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