JPH02205725A - Apparatus for measuring weight of separately packaged product - Google Patents

Abstract

PURPOSE:To make it possible to measure the weight of the total number of separately packaged products accurately without much time and labor to be spent by providing a slit in which a hook can be inserted along the conveying direction of the separately packaged products, and making a measuring pan protrude upward. CONSTITUTION:Eight lines of chutes 2 are provided in correspondence with the number of the lines of separately packaging machines. Each chute has a bottom wall 2a and a side wall 2b. A hook 5 pushes the rear part of a separately packaged product B and conveys the separately packaged product B. A slit 3 is formed in the longitudinal direction in each bottom wall 2a so that the hook 5 can be inserted. The hook 5 is formed in an inverted L shape. The upper part of the hook 5 is made to protrude through the bottom wall 2a of the chute 2 and is bent in the backward direction with respect to the moving direction, and a bent part 5a is provided. A chain 4 is moved and circulated underneath the chute 2. A plurality of the hooks 5 are linked to the chain 4 at a specified pitch P. The hooks 5 are continuously moved from the rear side to the front side of the chute 2 through the chain 4. Since a sprocket 6 to which the chain 4 is connected is fixed to a common driving shaft 7 and a slave shaft 6, the hook 5 is moved in synchronization with each chute line.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to packaging products in which powdered or liquid medicines, sugar, seasonings, etc. are packaged in sheet materials such as resin films. This invention relates to a weighing device for weighing packaged items during transportation when they are transported to a collection site.

<Conventional technology and its problems> Conventionally, the packaged products packaged using a package packaging machine protrude upward from a slit along the chute on the bottom wall of the chute, and continue along the slit from the rear to the front. They are conveyed to a predetermined accumulation site in front by being pushed by a plurality of hooks that move and are arranged at a predetermined pitch. Note that the predetermined number of packaged products accumulated at the accumulation site will then be accommodated in a predetermined packaging container.

When checking whether the contents of a packaged product are filled to a predetermined weight, it is necessary to check that the packaged product is constantly conveyed on the chute without interruption, and simply weigh the product in the middle of the chute. Even if the containers were placed, the weight of the packaged items in transit would have to be weighed, making accurate weighing impossible, so the packages were removed from the top of the chute and examined.

However, when the packaged items are extracted and weighed in this way, it is a time-consuming process, and it is difficult to check the total number of packaged items.

The present invention solves the above-mentioned problems, and aims to provide a weighing device for packaged products that can accurately weigh the entire number of packaged products without much effort.

Means for Solving the Problem> The weighing device for packaged products according to the present invention projects upward from a slit along the chute in the bottom wall of the chute and continuously moves B from the rear to the front along the slit. and a weighing device for packaged products that sequentially measures the weight of packaged products conveyed on the chute during transportation by being pushed by a plurality of hooks arranged at a predetermined pitch, respectively, A weighing pan is provided with a slit along the transport direction of the packaged product through which a hook can be inserted, and is shorter than the pitch of the hook and longer than the length of the packaged product in the transport direction, and the chute is cut out by protruding upward. a weighing device disposed on the bottom wall of the chute; and a weighing device disposed above the chute behind the weighing device, the hook moving direction into the slit of the chute bottom wall without interfering with the hook. a fast-feeding device including a fast-feeding rod that is inserted from above along the scale and detached upward near the rear of the weighing pan and moves faster than the moving speed of the hook, the fast-feeding rod of the fast-feeding device comprising: The insertion position of the chute bottom wall into the slit is set to be a position near the rear of a subsequent hook when a preceding hook is placed in the weighing pan of the weight scale or near the rear of the weighing pan, and the chute bottom The timing at which the following hook is inserted into the slit in the wall is when it passes the insertion position of the rapid feed rod, and the speed of movement within the slit in the chute bottom wall is set at the time when the preceding hook passes through the insertion position of the rapid feed rod. The chute is characterized in that when it is placed nearby, the speed is such that it can be removed from the slit in the bottom wall of the chute.

<Operations and Effects of the Invention> In the weighing device for packaged products according to the present invention, the packaged products packaged in the package packaging machine are conveyed by being pushed by the hooks on the chute. Then, the preceding hook is located in the weighing pan of the weighing device or near the rear of the weighing pan, and when the following hook passes through the insertion position of the fast-feeding rod in the fast-feeding device into the slit in the chute bottom wall, From behind the succeeding hook, a rapid feed rod is inserted into the slit in the bottom wall of the chute from above along the direction of movement of the hook. Thereafter, the rapid feed rod moves forward faster than the moving speed B of the hook, and when the leading hook is placed near the front of the weighing pan, it leaves the slit in the bottom wall of the chute upward. When moving through the slit in the wall, the packaged product being pushed by the trailing hook and being conveyed is fast-forwarded by the rapid-feed rod and placed on the weighing pan by the frictional resistance or the rear surface of the leading hook, and as a result, The packaged product will always be stopped on the weighing pan until it is pushed at the rear by a trailing hook.

Therefore, the weight scale is capable of weighing the packaged product stopped on the weighing pan, and is therefore responsible for accurate weighing. Then, the packaged products weighed with a weighing machine are
The rear portion of the sample is pushed by the following hook, causing it to move away from the weighing pan and be conveyed on the chute again.

Therefore, in the weighing device for packaged products according to the present invention, all the packaged products packed by the package packaging machine can be automatically stopped and weighed one after another on the weighing pan of the weighing device. , it is possible to accurately weigh the entire number of packaged items without much effort.

<Example> Hereinafter, one embodiment of the present invention will be described based on the drawings.

As shown in FIG. 5, the weighing device 11 of the embodiment is arranged in a chute 2 connected to a multi-row type (first row in the embodiment) dividing packaging machine 1. As shown in FIG. 3, rows are provided corresponding to the number of rows of the packaging machines 1, and each row is provided with a bottom wall 2a and a side wall 2b. A slit 3 along the longitudinal direction is formed in each bottom wall 2a so that a hook 5 for pushing the rear part of the packaged product B and conveying the packaged product B can be inserted therethrough.

A plurality of hooks 5 are connected at a predetermined pitch P to a chain 4 that circulates below the chute 2, and have an inverted shape with a bent portion 5a bent rearward in the moving direction at the upper part protruding from the chute bottom wall 2a. It is configured to move continuously from the rear to the front of the chute 2 via the chain 4. These hooks 5 can move synchronously in each chute row because the sprockets 6 connecting each chain 4 are fixed to a common drive shaft 7 and driven shaft 8 in each chute row. Become (1st, 3rd,
5), and in the case of the example, the pitch P of the hook 5
is approximately 2.5 times the length 2 of packaged product B in the transport direction
(approximately 250 mm) (see Fig. 1), and the hook 5 is moved at a high speed of approximately 14 m/min. As shown in the figure, each weighing device 11 is disposed below each chute 2 and includes a weighing device 12 and a fast-forwarding device 17.

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 product B. As shown in FIG. 4, the weighing pan 14 includes a bottom wall 14a and a side wall 14b along the conveyance direction of the packaged product B, and is configured to allow the hook 5 connected to the chain 4 to be inserted therethrough.
It is composed of two bent measuring pieces 15 facing each other and forming a slit 16 along the conveying direction of the packaged product B. Then, the measuring pan 14 measures the length of the packaged product B in the transport direction.
The pitch of the hook 5 is shorter than 2 minutes, and the length of the packaged product B in the conveyance direction is longer than 1 (approximately 90 m + a), and the bottom wall 14a is attached to the bottom wall 2b of the chute 2 at the cutout part of the chute 2.
('!Refer to figure J1).

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. When the weight of the packaged product B is outside a predetermined range, the control device 30 inputting the electric signal corresponding to the weight of the packaged product B sends a message to the defective product exclusion shutter 30 disposed in front of the chute 2. is opened independently in each chute row, allowing defective products C to be removed from the top of chute 2.
The system determines the timing at which the air passes through the shutter 31 and outputs a predetermined electric signal to a solenoid valve (not shown) of the air cylinder 32 that opens and closes the shutter 31 (see FIG. 1).

As shown in FIGS. 1 to 3, the rapid feed device 17 is arranged above the chute 2 behind the weight scale 12, and feeds the hook 5 into the slit 3 of each chute bottom q 2 a without interfering with the hook 5. The hook 5 is inserted from above along the moving direction and removed upward near the rear of the weighing pan 14.
It is equipped with a fast-forwarding rod 18 that moves faster than the moving speed of .

As shown in FIGS. 1 and 3, the rapid feed rod 18 is composed of two L half pieces 18a facing each other in a direction perpendicular to the slit 3 so as not to interfere with the hook 5.
The half pieces 18a are fixed to a common connecting shaft 19.

The connecting shaft 19 is held at both left and right ends by chains 20, 20, and the chains 20, 20 are, as shown in FIGS. 1 and 3,
A sprocket 22 fixed to a drive shaft 21 on the rear side and a sprocket 2 fixed on a driven shaft 23 on the front side, respectively.
It is connected to 4.

Then, the rapid feed rod 18 of each chute row is inserted into the slit 3 of the chute bottom wall 2a at the insertion position
The position is near the rear of the trailing hook 5B when hook A is placed.

Further, each rapid-feeding rod 18 is inserted into the slit 3 of the chute bottom wall 2a at a timing when the subsequent hook 5B passes through the insertion position X of the rapid-feeding rod 18.

Furthermore, each rapid feed rod 18 adjusts the moving speed of the chute bottom wall 2a within the slit 3 so that when the leading hook 5A is disposed near the front inside the weighing pan 14, it is removed from the slit 3 near the rear of the weighing pan 14. The speed is as fast as possible. In the case of the embodiment, the moving speed of the rapid feed rod 18 is approximately three times the moving speed of the hook 5.

To explain the operation mode of the weight measuring device 11 of this embodiment, first, the packaged products B packed by the package packaging machine 1 are sequentially
It is pushed onto the chute 2 by the hook 5 and is conveyed.

Then, the leading hook 5A is located in the weighing pan 14 of the weight scale 1-2, and the trailing hook 5B passes through the insertion position As shown in FIG.
The hook 5 is inserted into the slit 3 from above along the moving direction of the hook 5.

Thereafter, the rapid feed rod 18 moves forward faster than the moving speed of the hook 5, and when the leading hook 5A is placed near the front inside the weighing pan 14, as shown in FIG. It separates upward from slit 3.

Then, the fast feed rod 18 is inserted into the slit 3 of the chute bottom wall 2a.
When moving inside, the packaged product B being pushed and conveyed by the trailing hook 5B is fast-forwarded by the fast-feeding rod 18, regulated by the rear surface of the leading hook 5A, and placed on the weighing pan 14,
As a result, it will always be stopped on the weighing pan 14 until its rear part is pushed by the following hook 5B. In the example, the sample is stopped on the weighing pan 14 for about 0.4 seconds. In addition, in the embodiment, a bent portion 5a that bends backward is formed in the upper part of the hook 5, so that 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 weight scale [2] can weigh the packaged product B stopped on the weighing pan 14, so that it can accurately weigh the packaged product B. Then, the packaged product B weighed by the weighing device 12 is moved from the weighing pan 14 by being pushed at the rear by the following hook 5B, and is conveyed on the chute 2 again.

Therefore, in the weighing device 11 of the embodiment, all the packages B packed by the package packaging machine 1 can be automatically stopped and weighed one after another on the weighing pan 14 of the weighing device 12. , it is possible to accurately measure the weight of all the packaged products B without any effort.

Then, as shown in FIG. 5, the packaged product B weighed by the weighing device 11 is placed on the circulating hooks 3, 33, and 34, except in the case of a defective product C whose weight is outside the predetermined range. It is pushed, passes through the defective product exclusion shutter 31, is conveyed to the front end of the chute 2, and is accumulated at a predetermined accumulation site by the suction arm 35. By the way, if the result of weighing is a defective product C, the control device 30, which manually receives the signal from the weighing scale 12, determines the timing at which the defective product C passes and eliminates the defective product. From opening the shutter 31,
The defective products C are removed from the chute 2 to a defective product removal chute 35, passed from the defective product removal chute 36 to a defective product removal conveyor 37 perpendicular to the chute 2, and then stored in a storage box 38 on the side of the chute 2. Become.

In addition, in the weighing device 11 of the embodiment, when weighing a packaged product B whose length 1 in the transport direction is shortened, the driven shaft 23 is moved to the front side of the chute 2, Alternatively, by increasing the length of the 5-shaped piece 18a and rapidly moving the rapid-feed rod 18, the packaged product B can be brought into contact with the rear surface of the preceding hook 5.

Further, in the embodiment, the bent part 5a is provided on the upper part of the hook 5, so that when the packaged product B is fast-forwarded, the packaged product B is moved to the preceding hook 5A.
Although a hook that can surely contact the rear surface and stop on the weighing pan 14 is shown, if the moving speed of the rapid feed rod 18 is relatively slow and there is no risk of it coming off the hook 5A, a hook without the bent portion 5a may be used. It may also be used, and even without providing the bent portion 5a, fast forwarding is carried out at a portion from below the fast forwarding device 17 to above the weighing scale R device 12, as shown by the two-dot chain line at the right end of FIG. Guide bin 2 that regulates the upper part of packaged product B
5 may be provided to deal with the problem.

Further, in the embodiment, in order to stop the packaged product B on the weighing pan 14 of the weight scale 12, a configuration is shown in which the packaged product B is stopped on the rear surface of the preceding hook 5A. However, when the packaged product B is stopped on the weighing pan 14 due to friction when being fast-forwarded by the fast-forwarding rod 18 of the fast-forwarding device 17, it is not necessary to bring it into contact with the leading hook 5A. In this case, the leading hook 5A may be detached from the weighing pan 14 forward.

In addition, in the embodiment, the position
Leading hook 5. The case is shown in which the hook A is provided at a position near the rear of the trailing hook 5B with reference to the time when the hook A is located in the weighing pan 14. However, when the moving speed of the hook 5 is relatively fast,
The insertion position
It may be provided near the rear of the.

Furthermore, in the embodiment, the fast-forwarding rod 18 of the fast-forwarding device 17 is divided into two 5-shaped pieces 18a so that the hook 5 can be placed between them.
However, if the side wall 2b of the chute 2 allows the side wall 2b of the chute 2 to quickly feed the packaged product B in a well-balanced manner, the fast-feeding rod 18 may be formed from a single piece.

[Brief explanation of the drawing]

FIG. 1 is a sectional view along the chute of a weighing device showing an embodiment of the present invention, and is a sectional view at an earlier point in time than the state shown in FIG. 2. 3 is a sectional view taken in a direction perpendicular to the chute of the same embodiment, and FIG. 4 is a sectional view showing the m-111 portion of FIG. 5. FIG. 5 is a cross-sectional view taken in a direction perpendicular to FIG. 5 and showing the IV-TV portion of FIG. 5. FIG. DESCRIPTION OF SYMBOLS 1... Separate packaging machine, 2... Chute, 2a... Bottom wall, 3... Slit, 5... Hook, 11... 41 Weighing device, 12... Weighing device, 14 ... Weighing pan, 16... Slit, 17... Rapid feed device, 18... Rapid feed rod, B... Separated products, P... Pitch, L... Length of measuring pan, L: Length of the packaged product.

Claims (1)

[Claims] Projects upward from a slit along the chute in the bottom wall of the chute, moves continuously from rear to front along the slit, and is pushed by a plurality of hooks arranged at a predetermined pitch, respectively. Accordingly, the weight measuring device for packaged products sequentially weighs the weight of the packaged products conveyed on the chute during transportation, comprising a slit along the packaged product conveying direction through which the hook can be inserted. A weighing device in which a weighing pan that is shorter than the pitch of the hooks and longer than the length of the packaged items in the conveying direction is disposed in a portion of the bottom wall of the chute that protrudes upward and is cut out of the chute. , disposed above the chute at the rear of the weight scale, inserted into the slit in the bottom wall of the chute from above along the moving direction of the hook without interfering with the hook, and inserted upward near the rear of the weighing pan. a fast-feeding device having a fast-feeding rod that moves faster than the moving speed of the hook when the hook is detached from the chute; A position near the rear of the succeeding hook when the preceding hook is placed in the weighing pan of the measuring instrument or near the rear of the weighing pan, and the timing at which the succeeding hook is inserted into the slit in the bottom wall of the chute is determined. The speed of movement within the slit of the chute bottom wall is set to the time when the rapid feed rod passes the insertion position, and the speed of movement within the slit of the chute bottom wall is set to the time when the leading hook is disposed near the front of the weighing pan and leaves the slit of the chute bottom wall. A weighing device for weighing packaged products, which is characterized by a speed that is as fast as possible.