JPH0641875B2 - Weighing device for packaged items - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention provides a packaged product obtained by packaging a powder or liquid drug, sugar, seasoning, etc. in a sheet material such as a resin film from a packaging machine. The present invention relates to a weight measuring device for a packaged product, which weighs during transportation when transported to a stacking site.

<Conventional technology and its problems> Conventionally, packed products packaged by a packing and packaging machine are projected on the shute from the slits along the shouts of the bottom wall of the shouts, and continuously from the rear to the front along the slits. It is conveyed to a predetermined accumulation area in front by being moved by a plurality of hooks and pushed by a plurality of hooks arranged by a predetermined pitch. It should be noted that the predetermined number of packaged products accumulated in the accumulating portion are then stored in a predetermined packaging container.

Then, when checking that the contents of the packaged product are filled up to a predetermined weight, the packaged product is always continuously conveyed on the short cut without any interruption, and the weight is simply measured in the middle of the short cut. Even if the container is arranged, the weight of the packaged goods being moved cannot be measured, and the accurate measurement cannot be performed. Therefore, the packaged goods were taken out from the seat and investigated.

However, in the case where the separated packages are taken out and the weight is measured in this way, it is a labor-intensive operation, and it is difficult to check the total number of the separated packages.

This invention solves the above-mentioned subject, and an object of this invention is to provide the weight measuring apparatus of the packaged goods which can measure the weight of all the packaged goods correctly, without taking time and effort.

<Means for Solving the Problems> The weight measuring device for packaged goods according to the present invention is configured such that the weight of the package bottom wall projects upward from the slit along the shout of the shout bottom wall and continuously moves from the rear to the front along the slit. And a weight weighing device for packaged articles which sequentially weighs the packaged articles transported on the shute by being pushed by a plurality of hooks arranged by predetermined pitches, A slit is provided which can pass through the hook and is along the transport direction of the packaged product, and a weighing pan shorter than the pitch of the hook and longer than the length of the packaged product in the transport direction is projected upward to cut the shout. A weigher placed at the portion of the shout bottom wall that is missing, and a weight weigher disposed behind the weigher and above the shout, interfering with the hook into the slit of the shout bottom wall. A fast-forwarding device equipped with a fast-forwarding rod that is inserted from above along the moving direction of the hook, is detached upward near the rear part of the weighing pan, and moves faster than the moving speed of the hook. The fast-forwarding rod of the device, the insertion position into the slit of the shout bottom wall, in the weighing pan of the weighing machine or near the rear of the weighing pan, near the rear of the subsequent hook when the preceding hook is arranged. Position, the timing of insertion into the slit of the shout bottom wall, when the trailing hook has passed the insertion position of the rapid feed rod, the moving speed in the slit of the shout bottom wall, the preceding hook, When it is arranged near the front part of the weighing pan, the speed is such that it can be separated from the slit of the bottom wall of the shout.

<Operation / Effect of Invention> In the weight measuring apparatus for packaged goods according to the present invention, the packaged goods packaged by the packaging machine are pushed by the hooks on the seat and conveyed. Then, in the weighing pan of the weighing machine or in the vicinity of the rear of the weighing pan, the preceding hook is located, and the subsequent hook passes through the insertion position into the slit of the shute bottom wall of the fast-forwarding rod in the fast-forwarding device, From the rear of the trailing hook, the fast-forwarding rod is inserted into the slit of the shout bottom wall from above along the moving direction of the hook. After that, the fast-forwarding rod moves forward faster than the moving speed of the hook, and when the preceding hook is arranged near the front part of the weighing pan, the fast-forwarding rod disengages upward from the slit on the bottom wall of the shout.

When the fast-forwarding rod moves in the slit on the bottom wall of the shout,
It is fast-forwarded by the fast-forwarding rod and placed on the weighing pan with friction resistance or restricted to the rear surface of the preceding hook, and as a result, the packaged product is always stopped on the weighing pan until the trailing hook pushes the rear part. .

Therefore, the weight scale can accurately weigh the packaged product stopped on the weighing pan. And the packaged items weighed by the weight scale are
The trailing hook pushes the rear part, moves from the weighing pan, and is transported again on the short.

Therefore, in the weight measuring device for packaged goods according to the present invention, all the packaged goods packaged by the packaging machine are automatically stopped on the weighing pan of the weighing machine and weighed. Therefore, it is possible to accurately measure the weight of all of the packaged products without trouble.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 5, the weight weighing device 11 of the embodiment is arranged in a short 2 connected to a multi-row (eight rows in the embodiment) packaging packaging machine 1.

As shown in FIG. 3, the shorts 2 are provided in eight rows corresponding to the number of rows of the packing and packaging machine 1, and the bottom wall 2a and the side wall 2 are respectively provided.
and b. Each bottom wall 2a is formed with a slit 3 along the longitudinal direction so that a hook 5 for pushing the rear part of the packaged product B and carrying the packaged product B can be inserted.

The hook 5 has an inverted L shape having a bent portion 5a that is bent rearward in the moving direction at an upper portion protruding from the bottom wall 2a of the shute, and a plurality of hooks 5 are connected by a predetermined pitch P to a chain 4 that circulates and moves below the shute 2. It is configured so as to continuously move from the rear side to the front side of the shute 2 via the chain 4. These hooks 5 are fixed to the drive shaft 7 and the driven shaft 8 which are common to the sprockets 6 connecting the chains 4 in each shout row.
It will move synchronously in each short row (1st and 3rd)
・ See Fig. 5). In the case of the embodiment, the pitch P of the hook 5 has a length (about 250 mm) which is about 2.5 times the length 1 of the package B in the conveying direction (see FIG. 1). Further, the moving speed of the hook 5 is about 14 m / min, and the hook 5 is moved at a high speed.

Then, as shown in FIGS. 1 to 5, the weight measuring devices 11 are arranged below the respective seats 2, and each of the weight measuring devices 11 includes a weight measuring device 12 and a fast-forwarding device 1.
7 and 7.

The weight scale 12 includes a main body 13 and a weighing pan 14 that projects upward from the main body 13 and weighs the packaged goods B. As shown in FIG. 4, the weighing pan 14 is provided with a bottom wall 14a and a side wall 14b along the transport direction of the package B so that the hook 5 connected to the chain 4 can be inserted therethrough.
A slit 16 is formed along the conveying direction of the packaged product B, and is composed of two bent weighing pieces 15 facing each other. Then, the weighing pan 14 measures the length L of the packaged product B in the transport direction by
The length is shorter than the pitch P of the hook 5 and longer than the length 1 of the packaged product B in the transport direction (about 90 mm), and the bottom wall 2a of the short 2 is aligned with the bottom wall 14a at the cutout portion of the short 2. Are arranged (see FIG. 1).

The weight scale 12 is an electric scale that electrically measures the weight of the packaged product B, and inputs an electric signal corresponding to the weight of the packaged product B to the control device 30. Then, the control device 30 that has input the electric signal corresponding to the weight of the packaged product B has a defective product elimination shutter 31 arranged in front of the short 2 when the packaged product B has a weight outside the predetermined range. Are opened independently in each row of the shout so that the defective product C can be removed from the short 2.
A predetermined electric signal is output to a solenoid valve (not shown) of the air cylinder 32 that opens and closes the shutter 31 by checking the timing of passage of the shutter 31 portion (see FIG. 1).

As shown in FIGS. 1 to 3, the fast-forwarding device 17 is arranged above the shute 2 behind the weight scale 12 and moves into the slit 3 of each shout bottom wall 2a without interfering with the hook 5. A rapid feed rod 18 is provided which is inserted from above along the direction, is detached upward near the rear portion of the weighing pan 14, and moves faster than the moving speed of the hook 5.

As shown in FIGS. 1 and 3, the fast feed rod 18 is composed of two L-shaped pieces 18a facing each other in a direction orthogonal to the slit 3 so as not to interfere with the hooks 5, and the L of each shout row is arranged.
The letter pieces 18a are fixed to a common connecting shaft 19.
The left and right ends of the connecting shaft 19 are held by chains 20 and 20, and the chains 20 and 20 are, as shown in FIGS.
A sprocket 22 fixed to a rear drive shaft 21 and a sprocket 2 fixed to a front driven shaft 23, respectively.
4 is connected to.

The drive shaft 21 is a drive shaft 7 for continuously circulating the hook 5.
Similarly, since it is configured to continuously rotate faster than the drive shaft 7 from a drive source (electric motor) (not shown) of the packaging machine via an unillustrated gear or belt wheel, As the drive shaft 21 rotates, the drive shaft 21 continuously circulates at a speed higher than the moving speed of the hook 5.

Then, the fast-forwarding rod 18 of each shout row inserts the insertion position X of the shout bottom wall 2a into the slit 3 into the weighing pan 14 of the weighing scale 12 as shown in FIG.
It is a position near the rear of the trailing hook 5B when A is arranged.

Further, the timing at which each of the fast-forwarding rods 18 is inserted into the slit 3 of the shout bottom wall 2a is when the succeeding hook 5B has passed the insertion position X of the fast-forwarding rod 18.

Further, each of the fast-forwarding rods 18 separates the moving speed of the shout bottom wall 2a in the slit 3 from the slit 3 near the rear of the weighing pan 14 when the leading hook 5A is arranged near the front part in the weighing pan 14. It is supposed to be speed. In addition, since the rapid feed rod 18 is continuously circulated by the continuous rotation of the drive shaft 21, the rapid feed rod 18 moves at the same speed every time the subsequent hook 5B passes the position X. Must be inserted at X. Therefore, in the case of the embodiment, one fast-forward rod 18 that cyclically moves to each chute row.
In consideration of the distance between the shafts 21 and 22 and the length of the chain 20, the moving speed of the hook 5 is set to about three times. By the way, when using the chain 20 of the same length with the same distance between the shafts 21 and 22, and allowing the fast-forwarding rod 18 to be inserted into each chute row every half rotation of the chain 20 (can be inserted into each chute row) Fast forward rod 18
The connecting shaft 19 provided with the chain 2 of the existing connecting shaft 19
If you want to hold another in the symmetrical position at 0),
This can be dealt with at about 1.5 times the moving speed of the hook 5.

Explaining the operation mode of the weight weighing device 11 of this embodiment, first, the packaged products B packaged by the packaging machine 1 are sequentially pushed by the hooks 5 on the sheets 2 and conveyed.

When the leading hook 5A is positioned in the weighing pan 14 of the weight scale 12 and the trailing hook 5B passes through the insertion position X of the fast-forwarding rod 18 of the fast-forwarding device 17 into the slit 3 of the shout bottom wall 2a. As shown in FIG. 2, from the rear of the trailing hook 5B, the rapid feed rod 18 is attached to the shout bottom wall 2a.
It is inserted into the slit 3 from above along the moving direction of the hook 5.

After that, the fast-forwarding rod 18 moves forward faster than the moving speed of the hook 5, and when the preceding hook 5A is arranged near the front part in the weighing pan 14, as shown in FIG. Separate from the slit 3 upwards.

Then, the fast-forwarding rod 18 is provided on the slit 3 of the shout bottom wall 2a.
When moving inside, the packaged product B pushed and conveyed by the trailing hook 5B is fast-forwarded by the fast-forwarding rod 18, and is regulated by the rear surface of the preceding hook 5A and placed on the weighing pan 14.
As a result, the trailing hook 5B is always stopped on the weighing pan 14 until its rear portion is pushed. In the embodiment, the weighing pan 14 is stopped for about 0.4 seconds. Further, in the embodiment, the bent portion 5a that bends backward is formed in the upper part of the hook 5, and the fast-forwarded packaged product B is surely brought into contact with the rear surface of the preceding hook 5A and stopped on the weighing pan 14. The Rukoto.

Therefore, the weighing machine 12 can weigh the packaged goods B stopped on the weighing pan 14, and thus can weigh accurately. Then, the packaged goods B weighed by the weighing machine 12 are pushed by the trailing hooks 5B at the rear portion thereof to move from the weighing pan 14, and are conveyed again on the shute 2.

Therefore, in the weight weighing device 11 of the embodiment, all the packaged goods B packaged by the packaging machine 1 are automatically stopped on the weighing pan 14 of the weighing machine 12 and weighed. Therefore, it is possible to accurately measure the total weight of the packaged products B without any trouble.

Then, as shown in FIG. 5, the packaged goods B weighed by the weight weighing device 11 are circulated and moved to the hooks 3, 33, and 34, except for the defective goods C having a weight outside the predetermined range. It is pushed, passed through the defective article elimination shutter 31 portion, conveyed to the front end of the shute 2, and accumulated at a predetermined accumulation portion by the suction arm 35. By the way, if the defective product C is found as a result of the weighing, the control device 30 which receives the signal from the weighing machine 12 checks the timing at which the defective product C passes, and the defective product elimination shutter is used. From opening 31,
The defective product C is removed from the defective product exclusion unit 36 by the defective product exclusion unit 36, and is accommodated in the accommodation box 38 on the side of the short unit 2 via the defective product exclusion conveyor 37 which is orthogonal to the short unit 2 from the defective product exclusion unit 36. Become.

In the weight weighing device 11 of the embodiment, when weighing a packaged product B having a shorter length 1 in the transport direction, the driven shaft 23 may be moved to the front side of the shout 2, Alternatively, the length of the L-shaped piece 18a may be increased, and the fast-forwarding rod 18 may be fast-forwarded to bring the package B into contact with the rear surface of the preceding hook 5.

Further, in the embodiment, the bent portion 5a is provided on the upper portion of the hook 5 so that when the packaged product B is fast-forwarded, the packaged product B precedes the hook 5A.
Although it has been shown that it can surely come into contact with the rear surface of the hook and stop on the weighing pan 14, the hook without the bent portion 5a should be used unless the fast-forwarding rod 18 moves at a relatively slow speed and there is no risk of it coming off the hook 5A. You may use it. Even if the bent portion 5a is not provided, as shown by the two-dot chain line at the right end of FIG. It may be possible to deal with this by providing a guide pin 25 for regulation.

Further, in the embodiment, the package B is stopped on the weighing pan 14 of the weight scale 12, so that the package B is stopped on the rear surface of the preceding hook 5A. However, when fast-forwarding by the fast-forwarding rod 18 of the fast-forwarding device 17, if the packaged product B is stopped on the weighing pan 14 by friction, it does not have to be brought into contact with the preceding hook 5A. In this case, the leading hook 5A may be separated from the weighing pan 14 forward.

Further, in the embodiment, the position X at which the fast-forwarding rod 18 of the fast-forwarding device 17 is inserted into the slit 3 of the shout bottom wall 2a is
Based on when the preceding hook 5A is located in the weighing pan 14,
The case where it is provided at a position near the rear of the trailing hook 5B is shown.
However, when the moving speed of the hook 5 is relatively high, the leading hook 5A moves the insertion position X of the fast-forwarding rod 18 to the weighing pan 1
4 It may be provided in the vicinity of the rear of the trailing hook 5B based on the time of being located in the vicinity of the rear.

Further, in the embodiment, the fast-forwarding rod 18 of the fast-forwarding device 17 is provided.
So that the hook 5 can be placed between the two L-shaped pieces 18
Although it is shown that the package B can be fast-forwarded in a well-balanced manner, it is possible to use the side wall 2b of the shute 2 to package the package B.
If the fast-forwarding rod 18 can be fast-balanced in good balance, the fast-forwarding rod 18 may be composed of one sheet.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a weight measuring device in a direction along a shout according to an embodiment of the present invention. FIG. 1 is a cross-sectional view at an earlier time than the state shown in FIG. 2, and FIG. 3 is a sectional view in a direction orthogonal to the shout of the same embodiment, FIG. 3 is a sectional view showing a III-III portion of FIG. 5, and FIG. 4 is a shout of the same embodiment. FIG. 6 is a cross-sectional view in a direction orthogonal to, and is a cross-sectional view showing the IV-IV portion of FIG. 5, and FIG. 1 ... Packing machine, 2 ... Shute, 2a ... Bottom wall, 3 ... Slit, 5 ... Hook, 11 ... Weight measuring device, 12 ... Weighing device, 14 ... Weighing pan, 16 ...... Slit, 17 …… Fast-feeding device, 18 …… Fast-feeding rod, B …… Package, P …… Pitch, L …… Weighing pan length, l …… Package length.

Claims (1)

[Claims] 1. A bottom wall of a shout that protrudes upward from a slit along the shout and continuously moves from the rear to the front along the slit and is pushed by a plurality of hooks arranged by predetermined pitches. According to the present invention, there is provided a weight measuring device for a packaged product, which sequentially measures the weight of the packaged product transported on the shout, during transport, comprising a slit along the package transport direction capable of inserting the hook. A weighing scale that is shorter than the pitch of the hook and is longer than the length of the packaged product in the transport direction, is projected upward, and is placed at the cutout bottom wall portion where the cutout is cut out. It is disposed above the shout behind the weight scale, and is inserted into the slit of the shout bottom wall from above along the moving direction of the hook without interfering with the hook. A fast-forwarding device provided with a fast-forwarding rod that is disengaged upward near the rear part of the pan and moves faster than the moving speed of the hook, and the fast-forwarding rod of the fast-forwarding device is provided in the slit of the shout bottom wall. The insertion position is the position in the vicinity of the rear of the subsequent hook when the preceding hook is arranged in the weighing pan of the weight scale or in the vicinity of the rear of the weighing pan, and the timing of insertion into the slit of the bottom wall of the shout. Is the time when the trailing hook has passed the insertion position of the fast-forwarding rod, the moving speed in the slit of the shout bottom wall, when the leading hook is arranged near the front of the weighing pan, A weight measuring device for packaged items, which has a speed at which it can be separated from the slit on the bottom wall.