JP4533508B2 - Combination weighing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combination weighing device.
[0002]
[Prior art]
For example, a combination weighing device has been used in the past to pack non-uniform articles such as potato chips, peanuts, fruits, sausages, etc. together with a predetermined mass or a mass close to it. ing.
[0003]
In this combination weighing device, a large number of radial feeders are provided radially around a central dispersion table, and stock hoppers, weighing hoppers, and the like are arranged vertically below the tips of the respective radial feeders. A circular collecting chute is provided below, and the objects to be weighed are supplied to the dispersion table by a conveyor, etc., and the objects to be weighed supplied from the dispersion table are supplied to each stock hopper by a number of radiation feeders. Measure the mass of the object to be weighed supplied from each weighing hopper. Then, the masses of the objects to be weighed in the plurality of weighing hoppers are combined and added, and a predetermined mass or a combination close thereto is selected, dropped on the collecting chute, and collectively sent to the next process such as a packaging machine.
[0004]
Therefore, in the conventional combination weighing device having such a structure, as shown in FIG. 21, for example, a large number of stock hoppers 1 and weighing hoppers 2 arranged in the circumferential direction protrude from the outer periphery of the central housing 3. The brackets 4 and 5 are detachably supported by engaging members 17a and 17b and 18a and 18b provided on the back surfaces of the hoppers 1 and 2, respectively. Therefore, it is frequently hung and removed.
[0005]
Each of the hoppers 1 and 2 is provided with opening and closing lids 6 and 7 for opening and closing the discharge port at the lower end, and the opening and closing link mechanisms 8 and 9 and the recovery springs 10 and 11 for opening and closing the opening and closing lids 6 and 7 are respectively provided in the hopper. The movable bodies 12 and 13 that are provided on the outer surfaces of the wall portions 1 and 2 and are driven by a driving source disposed in the housing 3 are provided to protrude outward from holes (not shown) of the housing 3. The movable bodies 12 and 13 are configured to drive the hopper opening and closing link mechanisms 8 and 9 to open the opening and closing lids 6 and 7 and to be closed by the recovery springs 10 and 11. (In FIG. 19, 14 is a central dispersion table, and 15 is a radiation feeder.)
[0006]
[Problems to be solved by the invention]
However, in the conventional combination weighing device having such a structure, the opening and closing lids 6 and 7 are closed by the recovery springs 10 and 11, so that when the opening and closing lids 6 and 7 are closed, they strongly collide with the discharge ports of the hoppers 1 and 2. To do. The combination weighing device is provided with a large number of hoppers, and the open / close lid is frequently opened and closed within a short time for each hopper.
[0007]
For this reason, without using a recovery spring, both the rotation in the opening direction and the rotation in the closing direction are driven by the drive source in the same way, and when closing, the rotation speed of the opening and closing lid is reduced to close it gently. It is possible to do.
[0008]
However, if the biasing force of the spring is used, the opening / closing lid can be strongly pressed against the discharge port, but if the spring is not used, the adhesion between the opening / closing lid and the discharge port is incomplete with the opening / closing lid closed. The object to be weighed may leak from the gap between the opening / closing lid and the discharge port.
[0009]
It is an object of the present invention to provide a combination weighing device that can be easily adjusted so that the adhesion between the opening / closing lid and the discharge port when the opening / closing lid is closed so as to prevent this from happening. Yes.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, in the combination weighing device according to claim 1 of the present invention,
Multiple hoppers,
An open / close drive lever that rotates to open / close the open / close lid of the hopper;
A rotary shaft of the opening / closing drive lever, an operation bar that is operated by a drive source, one end is fixed to the rotation shaft, and the other end is rotatably attached to the operation bar. A combination weighing device comprising a drive arm containing a crank for rotating
A block is provided to be movable in the axial direction of the operating bar, and the other end of the crank is rotatably attached to the block.
By adjusting the axial position of the block on the operation bar, the rotation angle of the crank can be adjusted to adjust the rotation angle of the opening / closing lid by the opening / closing drive lever.
Therefore, by this adjustment, the opening / closing lid can reliably close the discharge port of the hopper so that the object to be weighed does not leak.
[0011]
In the combination weighing device according to claim 2 of the present invention,
Since the position of the block can be adjusted via an adjustment member operable from the outside of the drive arm, the opening / closing lid is securely closed by operating the adjustment member from the outside of the drive arm while the hopper is attached to the drive arm. Can be adjusted as follows.
[0012]
In the combination weighing device according to claim 3 of the present invention,
Since the drive arm has a hole that can be closed and the position of the block can be adjusted by an adjustment member that can be rotated from the hole of the drive arm, the hole can be closed after the adjustment operation. Also gets better.
[0013]
In the combination weighing device according to claim 4 of the present invention,
An adjustment screw screwed to the block and capable of adjusting the screwing depth by an external rotation operation is provided, and the position of the block can be adjusted by the screwing depth. Can be easily adjusted so that the open / close lid is securely closed.
[0014]
In the combination weighing device according to claim 5 of the present invention,
An adjustment screw screwed to the block and capable of adjusting the screwing depth by an external rotation operation, and the adjustment screw urges the block in a direction away from the tip of the drive arm, so that the adjustment screw is connected to the shaft of the operating bar. Biasing means that is positioned at a fixed position in the direction, and the position of the block can be adjusted by this screwing depth, so that the position of the adjusting screw in the axial direction of the operating bar of the adjusting screw can be adjusted by rotating the adjusting screw. Since the biasing force of the biasing means acts as elasticity when closing the discharge port with the opening / closing lid, the opening / closing lid is closed elastically pressed against the discharge port. Therefore, the discharge port is more completely blocked.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a combination weighing device according to an embodiment of the present invention.
As shown in FIG. 1, the housing 20 can be removed by covering a polygonal cylindrical main body 21 corresponding to the number of heads opened up and down and having a slightly smaller diameter on the lower side, and an upper surface opening of the main body 21. And a polygonal dish-shaped bottom plate body 23 having an open top surface, which is detachably fixed in a state where the upper end portion is slightly inserted from the bottom surface opening portion of the main body 21.
[0016]
The main body 21 is composed of a plurality of flat side walls 21a, 21a,... In which the lower side constituting the polygon is narrowed, and the bottom plate 23 is narrowed in the lower side constituting the polygon. It comprises flat side walls 23a, 23a,... And a polygonal flat bottom plate 23b.
[0017]
As shown in FIGS. 2 and 3, horizontal portions 30a, 30a,... At the upper ends of the four vertical columns 30, 30,... Penetrate into the side wall 21a of the main body 21 of the housing 20, and are fixed by the penetration portions. Thus, the main body 21 is supported by the four support columns 30, 30,.
The four horizontal portions 30a, 30a,... Are connected and fixed to each other in the center of the main body 21 so as to be orthogonal to each other in a cross beam shape. The lower portions of the four support columns 30, 30,... Are connected and fixed to each other by horizontal frames 31, 32, 33, and 34.
[0018]
A circular umbrella-shaped dispersion table 25 is provided on the upper portion of the bulging portion 22a at the center of the upper cover 22 of the housing 20, and a number of radiation feeders 26, 26,... (Only one is illustrated in FIGS. 1 and 2).
[0019]
The side walls 21a, 21a,... Of the housing body 21 correspond to the radiation feeders 26, 26,... Above and below the horizontal portions 30a, 30a,. The circular arm insertion holes 27 and 28 arranged in a vertical direction are provided in two upper and lower stages. Further, arm insertion holes 29 are provided in the side walls 23a, 23a,.
[0020]
As shown in FIG. 2, support arms 41, 42, and 43 are provided so as to project radially outward from the arm insertion holes 27, 28, and 29, respectively. The stock hopper 51, the weighing hopper 52, and the memory hopper 53 are detachably attached to the drive arms 41, 42, and 43, respectively, and an object to be weighed that falls from the tip of the radiation feeder 26 is supplied to the stock hopper 51. It is supplied from the stock hopper 51 to the weighing hopper 52 and supplied from the weighing hopper 52 to the memory hopper 53.
[0021]
Below the housing 20, a circular funnel-shaped collecting chute 55 is attached by the horizontal frames 31 to 34, and a guide chute 56 is detachably attached to each memory hopper 53, and a plurality of memories selected for combination The objects to be weighed from the hoppers 53, 53,... Fall through the guide chutes 56, 56,... To the collecting chute 55 (in FIG. 1, the drive arms 41, 42, 43, the stock hopper 51, the weighing hopper 52, the memory hopper 53 and only one guide chute 56 are shown.)
[0022]
The base of the uppermost drive arm 41 for supporting the stock hopper 51 is fixed to a base (not shown) provided inside the main body 21 of the housing 20, and also for supporting the memory hopper 53. The lowermost drive arm 43 is fixed to a base (not shown) provided inside the bottom plate body 23 of the housing 20, and is fixed by waterproof covers 27 a and 29 a in the arm insertion holes 27 and 29. However, the drive arm 42 for supporting the intermediate weighing hopper 52 is a weighing instrument (not shown) having a fixed end fixed to a base (not shown) fixed in the main body 21 of the housing 20. The waterproof cover 28a is elastically configured, for example, like a bellows structure so as not to prevent the vertical movement in the arm insertion hole 28.
[0023]
4 to 8 show the drive arm 42 (the other drive arms 41 and 43 have the same configuration as the drive arm 42).
The drive arm 42 includes a hollow cylindrical arm portion 61 whose base side is open. A mounting flange 62 projects from the base. As shown in FIG. 7, a screw hole 63 is provided at the center of the distal end surface 61 a of the arm portion 61, and the screw hole 63 is normally closed by screwing a cover screw 64. An annular recess 63a is provided on the outer side of the screw hole 63, and a waterproof ring 65 is fitted into the annular recess 63a. For this reason, when the lid screw 64 is screwed, the waterproof ring 65 prevents water from entering the screw hole 63 during washing or the like.
[0024]
In the vicinity of the tip of the arm portion 61, an annular groove 66 is provided that engages with a first leg plate 112 of a hook 111 of the hopper 52 described later to restrict the movement of the arm portion 61 in the axial direction. Tapered portions 66a and 66b are provided on both sides of the annular groove 66 so that the first leg plate 112 of the hook 111 of the hopper 52 can be easily inserted.
[0025]
On the arm portion 61, a cylindrical bulging body 67 projects from the annular groove 66 on the base side so as to bulge integrally above the arm portion 61.
The cylindrical bulging body 67 has a bottomed cylindrical shape with an open end, and is coupled in a lateral direction perpendicular to the arm portion 61, and the bottom plate 67 a of the cylindrical arm portion 61 is formed as shown in FIG. 8. The cylindrical portion 67b is on the same plane as the tangent to the side circumference, and the cylindrical portion 67b protrudes further outward from the opposite side surface of the arm portion 61. It has become.
[0026]
As shown in FIG. 8, a plurality of studs 68 project from the inner surface of the bottom plate 67 a of the cylindrical bulge 67. The first holding plate 70 holding the first bearing 69 and the second holding plate 72 holding the second bearing 71 are hollow cylinders between the first holding plate 70 and the second holding plate 72. The ends of the long screws 74 are screwed into the studs 68 through the holes of the spacers 73 through the holes of the second holding plate 72 through the spacers 73 and are fixed in parallel to each other.
[0027]
A stud 75 having a screw hole is attached to the second holding plate 72, and a screw 77 is inserted into the screw hole from the hole of the disc lid 76 that closes the opening 67 c of the cylindrical portion 67 b of the cylindrical bulge 67. The disc lid 76 is attached by screwing 77.
A ring-shaped packing 78 is sandwiched between the disc lid 76 and the opening 67c for waterproofing.
[0028]
A shaft 81 of an opening / closing drive lever 80 that opens and closes the opening / closing lid 125 of the hopper 52 is rotatably held by front first and second bearings 67 and 71. The shaft 81 protrudes outward from the bottom plate 67a through a hole in a waterproof disc-shaped packing 79 fitted in a hole in the bottom plate 67a of the cylindrical bulge 67, and is in the form of a strip plate parallel to the bottom plate 67a. It is fixed to the opening / closing drive lever 80. At the lower end of the opening / closing drive lever 80, an engaging protrusion 80a in the longitudinal direction of the opening / closing drive lever 80 that engages with an opening / closing lid 125 described later is projected.
[0029]
The upper end of the crank 82 is fixed to the shaft 81.
An operating bar 84 is accommodated inside the arm portion 61 with one end protruding outward.
The actuating bar 84 has a U-shaped cross section composed of a band plate 84a and side plates 84b and 84c bent at right angles on both sides thereof, and as shown in FIG. It is rotatably attached to a pin 85a of a rotating plate 85 that is rotated by an opening / closing drive motor (not shown) provided in the main body 21.
[0030]
7 and 8, a rectangular block 86 is accommodated between the side plates 84b and 84c so as to be movable in the longitudinal direction along the strip plate 84a. Yes. A lower end portion of the crank 82 whose upper end portion is fixed to the shaft 81 is rotatably attached to a pin 87 planted on one end side of the block 86.
[0031]
As shown in FIG. 7, a screw hole 88 is provided in the longitudinal direction at the end face of the other end of the block 86, and an edge plate 84d is provided at the other end of the operating bar 84. The edge plate 84d is inserted through the hole of the edge plate 84d. The adjusted screw 89 is screwed into the screw hole 88.
[0032]
A coil spring 90 is accommodated in the side plates 84b and 84c of the operating bar 84 so as to surround the adjusting screw 89. One end of the coil spring 90 presses the end surface of the block 86, and the other end contacts the inner surface of the edge plate 84d. By pressing, the block 86 is urged away from the edge plate 84d. Therefore, the head 89a of the adjustment screw 89 is always in contact with the edge plate 84d, and the block 86 is always located at the same position determined by the screwing depth of the adjustment screw 89.
[0033]
Therefore, when the rotary plate 85 is rotated by the opening / closing drive motor as shown in FIG. 5, the operation bar 84 reciprocates in the arm portion 61, and the crank 82 moves the shaft 81 in accordance with the movement of the operation bar 84. It rotates integrally with the shaft 81 as the center. For this reason, the opening / closing drive lever 80 is rotated clockwise by a predetermined angle integrally with the shaft 81 by the reciprocating motion of the operation bar 84 and then rotated counterclockwise to return to the original position. Thereby, opening / closing of the opening / closing lid 125 described later is executed.
[0034]
The cap screw 64 is removed from the screw hole 63 at the tip of the arm 61, and a wrench having a polygonal column at the tip is inserted through the screw hole 63 to engage with the polygonal hole 89a 'of the head 89a of the adjustment screw 89. Then, the angle of the crank 82 (and the opening / closing drive lever 80) is adjusted by adjusting the position of the block 86 by adjusting the screwing length of the block 89 into the screw hole 88 of the block 86 by rotating the adjusting screw 89. Can be adjusted. Thus, the opening of the hopper 51 can be adjusted so that the opening / closing lid 125 is closed securely.
[0035]
A hole 67b 'is provided in the upper center of the cylindrical portion 67b of the cylindrical bulge 67, and a columnar engagement for engaging with an engagement hole 117 of the upper plate 113 of the hook 111 of the hopper 52 described later. The lower end of the mating protrusion 95 is fixed by caulking so that it protrudes upward from the hole 67b '.
[0036]
The columnar engagement protrusion 95 is provided with a notch 96 on the side opposite to the bottom plate 67 a of the cylindrical bulge 67, and the upper part of the notch 96 is recessed toward the center of the engagement protrusion 95. An inclined flat taper portion 96a is provided.
The configuration of the upper drive arm 41 and the lower drive arm 43 is exactly the same as that of the drive arm 42 described above, and a description thereof will be omitted.
[0037]
9 to 12 show a weighing hopper 52 (the other hoppers 51 and 53 have the same configuration except that the weighing hopper 52 and the upper portion of the hopper main body are different in size).
[0038]
The hopper 52 includes a hopper body 100, an opening / closing lid 125 that opens and closes a discharge port of the hopper body 100, and a hook 111 that detaches the hopper body 100 from the drive arm 42.
[0039]
The hopper body 100 has a substantially quadrangular pyramid shape in which a front plate 101, a back plate 102, and both side plates 103, 104 are rounded, and the front plate 101, the back plate 102, and both side plates 103, 104 are on the upper side. The upper half of the upper half that gradually spreads in a trumpet shape is provided with a storage port 106, the side plates 103 and 104 are parallel to each other, and the front plate 101 and the back plate 102 are gradually narrowed as the lower side gradually approaches the lower half. A discharge port 108 is provided at the lower end of the section.
[0040]
In the upper part of the lower half of the hopper, a belt plate 110 is fixed by appropriate means such as welding so as to be wound around the outer surface along the side plate 104 from the side plate 103.
[0041]
As shown in FIG. 10, a hook 111 for hanging on and off the driving arm 42 is integrally projected from an end portion 110 a on the side plate 104 side of the band plate 110.
[0042]
The hook 111 is substantially U-shaped and has a flat plate-shaped first leg plate 112 bent at a right angle from the end portion 110 a of the band plate 110 and an arc shape from the upper end portion of the first leg plate 112. A flat plate-like upper plate 113 which is curved in a horizontal direction and is orthogonal to the first leg plate 112, and is curved and connected in a circular arc shape downward from the end of the upper plate 113. The leg plate 112 and the flat plate-like second leg plate 114 are formed in parallel.
[0043]
As shown in FIG. 14, the lower end of the first leg plate 112 is in contact with the upper and lower sides of the annular bottom 66 c of the annular groove 66 at the tip of the arm portion 61 of the drive arm 42 from the left and right. The first engaging recess 115 having a slanted end face 115a, 115b and having a "C" -shaped lower side is provided, and the lower end of the second leg plate 114 is provided with the cylinder as shown in FIG. 3rd and 4th inclined end surfaces 116a and 116b for abutting from the left and right on both upper sides of the outer peripheral surface of the arm portion 61 slightly on the base side from the bulging body 67 and having a "C" shape. A second engaging recess 116 having a wider side is provided.
[0044]
Further, an engagement protrusion 95 projecting from the upper portion of the cylindrical bulging body 67 is inserted into the upper plate 113 of the hook 111 slightly in the center near the second leg plate 114, and this engagement protrusion 95 is inserted. An engagement hole 117 having a linear hole edge end surface 117 a that comes into contact with the tapered portion 96 a of the notch 96 is provided.
Note that a tongue piece 114a is provided so as to project from the second leg plate 114 to the band plate 110, and the tip thereof is fixed to the band plate 110 by welding.
[0045]
As shown in FIG. 9, mounting shafts 120 and 121 are planted on the same straight position of the end portion 110 a of the hopper body 100 of the band plate 110 on the side plate 103 side and the end portion 110 b of the side plate 104 side, Flat mounting arms 122 and 123 that are parallel to each other are rotatably mounted on the mounting shafts 120 and 121, respectively.
[0046]
The mounting shafts 120 and 121 which are the rotation centers are on the same line as the axis of the shaft 81 of the opening / closing drive lever 80 of the drive arm 42 in a state where the hook 111 is attached to the drive arm 42.
[0047]
The rotating arms 122 and 123 are integrally connected by orthogonal bottom plates 124, and an open / close lid 125 that closes the discharge port 108 of the hopper body 100 is fixed to the upper surface of the bottom plate 124 by appropriate means such as welding.
[0048]
An adjustment plate 127 having a rectangular slit 126 (FIG. 16) at the lower end, on which the engagement protrusion 80 a of the opening / closing drive lever 80 is inserted from below, is overlapped on the outer surface of the rotation arm 123. Like 123, it is rotatably attached to the stud 121.
As shown in FIGS. 12, 17, and 18, the adjustment plate 127 includes an elliptical cam hole 128 on the side of the engagement slit 126.
[0049]
A shaft 129b of a bolt 129 having a head 129a fixed to the back surface of the rotating arm 123 by an appropriate means such as welding is projected through the hole 123a of the rotating arm 123 to the outer surface side. The cam body 130 accommodated in the 127 cam hole 128 passes through the hole 131 and further protrudes outward.
[0050]
The cam body 130 has a diameter slightly smaller than that of the minor axis on the back surface of the base 130 a having a dimension larger than the minor axis of the elliptical cam hole 128, for example, a regular hexagonal plate shape. A slightly smaller circular disc 130b is projected, and the hole 131 is in an eccentric position from the center of the circular circle of the circular plate 130b. Then, a cap nut 132 is screwed onto the screw surface at the tip of the shaft portion 129b of the bolt 129 on the outer surface of the base 130a, and the adjustment plate 127 is connected to the outer surface of the rotating arm 123 and the outer edge of the base 130a of the cam body 130. Tightened and fixed between the back of the.
[0051]
For this reason, when the cap nut 132 is loosened and the cam body 130 is rotated, the cam body 130 is centered on the eccentric hole 131, that is, centered on the shaft portion 129 b of the bolt 129 fixed to the rotating arm 123. The adjustment plate 127 can be rotated around the mounting shaft 121 with respect to the rotating arm 123 as shown in FIG. 18 by rotating and pushing the hole end surface of the elliptical cam hole 128 at the peripheral edge of the disk 130b. Therefore, by adjusting the rotational position of the adjustment plate 127 with respect to the rotating arm 123 and tightening the cap nut 131 again, the mounting angle of the adjustment plate 127 with respect to the rotating arm 123 can be changed. It can be adjusted by the cam body 130 to close the discharge port 108 reliably.
[0052]
As shown in FIG. 16, a plate-like spacer 140 is fixed to the outer surface of the adjustment plate 127 by appropriate means such as welding so that the notch 141 overlaps the slit 126.
[0053]
The notch 141 of the spacer 140 includes an inlet portion 141a and a circular portion 141b at the back thereof. The slit 126 of the adjusting plate 127 and the inlet 141a of the notch 141 of the spacer 140 are engaged so that the engaging protrusion 80a of the opening / closing drive lever 80 can pass through even slightly obliquely without being aligned with the linear direction of the slit 126. It is set to be considerably wider than the strip 80a.
[0054]
In the circular portion 141 b of the notch 141 of the spacer 140, a rotating body 150 that is rotatable in contact with the inner peripheral surface of the circular portion 141 b and slightly smaller in thickness than the spacer 140 is accommodated. ing.
[0055]
The rotating body 150 is provided with a diametrical engagement slit 151 into which the engagement protrusion 80a of the opening / closing drive lever 80 that has entered from the slit 126 and the inlet portion 141a is inserted and engaged. Tapered portions 151a and 151a are provided on both sides of the entrance of the engagement slit 151 so that the engagement protrusions 80a can be easily inserted.
[0056]
A cover plate 160 is fixed to the outer surface of the spacer 140 by appropriate means such as welding so that the rotating body 150 does not come off. The cover plate 160 includes a rectangular notch 161 having tapered portions 161a and 161a on both sides of the entrance. A plate-like stopper 162 bent inward is provided at the back of the notch 161.
[0057]
The plate-like stopper 162 is in a state of entering the inner part of the engagement slit 151 of the rotator 150, and the engagement slit 151 of the rotator 150 rotates more than necessary, so that the inlet 141a of the spacer 140 is rotated. This is for restricting the rotational range of the rotating body 150 so that the engaging ridge 80a cannot enter due to being detached from the rotation.
[0058]
In the method of closing the open / close lid of the hopper with the urging force of the recovery spring, the collision sound when closing becomes a loud noise. For this reason, in the method of closing the open / close lid by driving the motor, if the engagement of the open / close drive lever 80 with the engagement protrusion 80a is not stable, it cannot be completely closed. For this reason, it is necessary to make the width of the engagement slit as narrow as possible in order to make the engagement between the slit and the engagement protrusion 80a a complete contact state without rattling.
However, if the width of the engagement slit is reduced, it is difficult to smoothly insert the engagement protrusion 80a into the engagement slit when the hopper is attached to the drive arm.
[0059]
However, in the above-described embodiment, the slit 126 of the adjustment plate 127 is widened, the rotating body 150 is provided, and the engaging slit 151 that engages the engaging protrusion 80a without rattling is provided on the rotating body 150. For example, even when the engaging protrusion 80a is in the same direction as the slit 126 as shown in FIG. 19 or when it is inclined as shown in FIG. 20, the engaging protrusion 80a is guided by the tapered portion 151a and the engagement of the rotating body 150 is performed. Proceeding to the joint slit 151, the rotating body 150 rotates so as to be in the same direction as the engaging protrusion 80a enters, so that the slit 126 and the engaging protrusion 80a rotate even if they are slightly inclined from the same straight line. This inclination is absorbed by the body 150, so that it can be smoothly inserted and engaged.
[0060]
Further, when the hopper is removed, when the engaging ridge 80a starts to be removed from the engaging slit 151 of the rotating body 150, the rotating arm 123 starts to rotate due to the weight of the opening / closing lid 125 and is inclined with respect to the engaging ridge 80a. In this case, the rotating body 150 rotates according to the inclination in this case, so that the engaging protrusion 80a can be smoothly removed.
[0061]
Since the drive arm 42 and the hopper 52 are configured as described above, in order to attach the hopper 52 to the drive arm 42, the hopper body 100 is already supported while supporting the opening / closing lid 125 from below with one hand so as to close the discharge port 108. Hold with one hand, the upper end of the engaging ridge 80a at the lower end of the open / close drive lever 80 of the drive arm 42 is the slit 126 of the adjustment plate 127 of the hopper 52 (the inlet portion 141a of the notch 141 of the spacer 140, the cover plate). The engagement protrusions 95 projecting upward from the cylindrical bulging body 67 of the drive arm 42 are passed through the engagement holes 117 of the upper plate 113 of the hook 111 while being inserted from the lower side of the notch 161) of 160. The first leg plate 112 of the hook 111 is inserted into the annular groove 66 at the tip of the arm portion 61 of the drive arm 42 while being guided by the tapered portions 66a and 66b, and the second leg plate 112 is inserted. Placed on a base side of the cylindrical bulged body 67 of the arm portion 61 of the leg plate 114, let go.
[0062]
In this case, the engagement protrusion 80a of the opening / closing drive lever 80 enters the engagement slit 151 of the rotating body 150, and the engagement protrusion 80a and the engagement slit 151 do not coincide with each other on the same straight line. The engaging protrusion 80a enters the engaging slit 151 of the rotating body 150 while rotating within the circular portion 141b of the notch 141 of the spacer 140 so that the rotating body 150 fits the engaging protrusion 80a. Engaged.
[0063]
The first and second inclined end surfaces 115a and 115b on both sides of the first engaging recess 116 cut out in the shape of a letter C of the first leg plate 112 are the upper both sides of the cylindrical groove bottom 66a of the annular groove 66. The third and fourth inclined end surfaces 116a and 116b on both sides of the second engaging recess 116 notched in a C shape of the second leg plate 114 are in contact with both upper sides of the cylindrical arm portion 61. The linear hole edge end surface 117a on the side away from the hopper body 100 of the engagement hole 117 of the upper plate 113 is engaged with the drive arm 42 by the clockwise (in FIG. 14) rotational moment due to the mass of the hopper body 100. The hopper 52 is held in a state of being supported by the drive arm 42 in a state of being in contact with the upper tapered portion of the notch 96 of the mating protrusion 95.
[0064]
The opening / closing lid 125 is opened and closed by the rotation of the rotating plate 85 by a motor (not shown), but the opening / closing lid 108 firmly closes the discharge port 108 of the hopper body 100 in a state where the rotating plate 85 is in the closed position. The relative angle between the adjusting body 127 and the rotating arm 123 by the rotation of the cam body 130 can be adjusted so that the above state is obtained.
[0065]
Further, by removing the cap screw 64 at the tip of the arm portion 61 of the drive arm 42, inserting a tool, and rotating the adjusting screw 89 to change the position of the block 86 on the operating bar 84, the open / close lid 108 is firmly closed. Can be adjusted.
[0066]
Therefore, such adjustments can be made with the hopper attached to the drive arm, and the adjustment mechanism is inside the drive arm and is not exposed to the outside. If the object is food, there will be no sanitary inconvenience.
Further, by tightening the lid screw 64, the waterproofness is also complete.
[0067]
In the above description, the intermediate drive arm 42 and the weighing hopper 52 have been described. However, the upper and lower drive arms 41 and 43, the stock hopper 51, and the memory hopper 53 have the same configuration, and are hung on the respective drive arms. The removal is performed in the same manner.
[0068]
【The invention's effect】
As described above, in the combination weighing device according to claim 1 of the present invention,
Multiple hoppers,
An open / close drive lever that rotates to open / close the open / close lid of the hopper;
A rotary shaft of the opening / closing drive lever, an operation bar that is operated by a drive source, one end is fixed to the rotation shaft, and the other end is rotatably attached to the operation bar. A combination weighing device comprising a drive arm containing a crank for rotating
A block is provided to be movable in the axial direction of the operating bar, and the other end of the crank is rotatably attached to the block.
By adjusting the axial position of the block on the operation bar, the rotation angle of the crank can be adjusted to adjust the rotation angle of the opening / closing lid by the opening / closing drive lever.
Therefore, by this adjustment, the opening / closing lid can reliably close the discharge port of the hopper so that the object to be weighed does not leak.
[0069]
In the combination weighing device according to claim 2 of the present invention,
Since the position of the block can be adjusted via an adjustment member operable from the outside of the drive arm, the opening / closing lid is securely closed by operating the adjustment member from the outside of the drive arm while the hopper is attached to the drive arm. Can be adjusted as follows.
[0070]
In the combination weighing device according to claim 3 of the present invention,
Since the drive arm has a hole that can be closed and the position of the block can be adjusted by an adjustment member that can be rotated from the hole of the drive arm, the hole can be closed after the adjustment operation. Also gets better.
[0071]
In the combination weighing device according to claim 4 of the present invention,
An adjustment screw screwed to the block and capable of adjusting the screwing depth by an external rotation operation is provided, and the position of the block can be adjusted by the screwing depth. Can be easily adjusted so that the open / close lid is securely closed.
[0072]
In the combination weighing device according to claim 5 of the present invention,
An adjustment screw screwed to the block and capable of adjusting the screwing depth by an external rotation operation, and the adjustment screw urges the block in a direction away from the tip of the drive arm, so that the adjustment screw is connected to the shaft of the operating bar. Biasing means that is positioned at a fixed position in the direction, and the position of the block can be adjusted by this screwing depth, so that the position of the adjusting screw in the axial direction of the operating bar of the adjusting screw can be adjusted by rotating the adjusting screw. Since the biasing force of the biasing means acts as elasticity when closing the discharge port with the opening / closing lid, the opening / closing lid is closed elastically pressed against the discharge port. Therefore, the discharge port is more completely blocked.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a front view showing a state where a hopper is removed in FIG.
FIG. 3 is a plan view showing a support structure of the housing
FIG. 4 is a perspective view showing a support arm according to an embodiment of the present invention.
FIG. 5 is a front view showing the support arm.
FIG. 6 is a right side view showing the support arm.
FIG. 7 is a cross-sectional view showing the main part of the support arm
FIG. 8 is a cross-sectional view showing the main part of the support arm
FIG. 9 is a plan view showing a hopper according to an embodiment of the present invention.
FIG. 10 is a perspective view of the main part of the hopper.
FIG. 11 is a plan view of the main part of the hopper.
FIG. 12 is a front view of the main part of the hopper.
FIG. 13 is a front view showing a state in which the hopper is supported by a support arm.
FIG. 14 is a right side view of the same state.
FIG. 15 is a left side view of the same state
FIG. 16 is an exploded perspective view showing a main part of the hopper.
FIG. 17 is a cross-sectional view showing the main part of the hopper
FIG. 18 is a front view showing the operation of the adjusting body in the hopper.
FIG. 19 is an explanatory view showing an engagement relationship with the engagement protrusion.
FIG. 20 is an explanatory diagram showing an engagement relationship with the engagement protrusion.
FIG. 21 is a schematic configuration diagram of a conventional combination weighing device.
[Explanation of symbols]
20 housing
21 Body
22 Upper lid
23 Bottom plate
27, 28, 29 Arm insertion hole
41, 42, 43 Drive arm
51 Stock Hopper
52 Weighing hopper
53 Memory Hopper
55 Collective Shoot
56 Guide chute
61 arms
64 Cap screw
66 annular groove
66c groove bottom
67 Cylindrical swelling
80 Open / close drive lever
80a Engagement ridge
81 axes
82 crank
84 Actuation bar
86 blocks
89 Adjustment screw
90 Coil spring
95 Engagement protrusion
96a Taper part
100 Hopper body
108 outlet
111 hook
112 First leg plate
113 Upper plate
114 Second leg plate
115 1st engagement recessed part
115a First inclined end face
115b Second inclined end face
116 Second engaging recess
116a Third inclined end face
116b Fourth inclined end face
117 engagement hole
117a hole edge end face
122, 123 Rotating arm
125 Open / close lid
126 slit
127 Adjustment plate
128 Cam hole
130 Cam body
140 Spacer
141 Notch
141a entrance
141b Circular part
150 Rotating body
151 engagement slit
160 Cover plate
162 Stopper

Claims (5)

Multiple hoppers,
An open / close drive lever that rotates to open / close the open / close lid of the hopper;
A rotary shaft of the opening / closing drive lever, an operation bar that is operated by a drive source, one end is fixed to the rotation shaft, and the other end is rotatably attached to the operation bar. A combination weighing device comprising a drive arm containing a crank for rotating
A block is provided to be movable in the axial direction of the operating bar, and the other end of the crank is rotatably attached to the block.
The combination weighing device characterized in that the rotation angle of the crank can be adjusted by adjusting the position of the block in the axial direction of the operation bar so that the rotation angle of the opening / closing lid by the opening / closing drive lever can be adjusted. . The combination weighing device according to claim 1, wherein the position of the block can be adjusted via an adjustment member operable from the outside of the drive arm. The combination weighing device according to claim 1, wherein a hole capable of being closed is provided in the drive arm, and the position of the block can be adjusted by an adjustment member that can be rotated from the hole of the drive arm. The combination weighing device according to claim 1, further comprising an adjustment screw that is screwed to the block and capable of adjusting a screwing depth by an external rotation operation, and the position of the block can be adjusted by the screwing depth. An adjustment screw screwed to the block and capable of adjusting the screwing depth by an external rotation operation, and the adjustment screw urges the block in a direction away from the front end of the drive arm so that the adjustment screw is connected to the shaft of the operating bar. The combination weighing device according to claim 1, further comprising an urging unit positioned at a fixed position in a direction, wherein the position of the block can be adjusted by the screwing depth.

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