Weight Inspection Equipment

Abstract

To provide a weight inspection device which can be reduced in weight while being increased in rigidity of a frame.SOLUTION: A weight inspection device 100 comprises: a conveyance weighing unit 20 for measuring the weight of a test object P while conveying the test object P in a conveyance direction TD; and a frame 50 for supporting the conveyance weighing unit 20. The frame 50 has at least four struts 51, 52 that are arranged at positions not overlapping the conveyance weighing unit 20 in a plan view, and at least four beams 53, 56, 57 that form a square in a plan view. The beams 53, 56, 57 include a pair of upper beams 53 which are connected to a left strut 51 and a right strut 52A, respectively, and the height of at least one upper end face 53c of an upper beam 53B is the same as or higher than the height of a conveyance plane 24 of the conveyance weighing unit 20.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a weight checker. [Background technology]

[0002] Conventionally, a weight inspection device is known that measures the weight of an object to be inspected while transporting it and supplies the object to a downstream device. The weight inspection device includes an intake unit that takes in the object to be inspected and a weighing unit that detects the weight of the object to be inspected supplied from the intake unit. The intake unit and the weighing unit are supported by a stand. For example, as described in Patent Document 1, the stand includes a pair of inverted U-shaped leg members arranged at a predetermined distance in the transport direction (X-axis direction in Patent Document 1), and a pair of rail-like members fixed on the pair of leg members and extending in the transport direction. The rail-like members are fixed to the horizontal portions of the leg members by welding or the like. The rail-like members support a weighing box of the weighing unit and an intake box of the intake unit.

[0003] In the device of Patent Document 1, a load cell, which is a strain-generating body, is attached inside a weighing box. One fixed end of the load cell is fixed inside the weighing box, and the other free end of the load cell supports the weighing conveyor via a motor box that houses a drive motor and a pair of support members. In the weighing section, the weight of the weighing conveyor itself and the weight of the object to be inspected are transmitted to the free end of the load cell via the support members, motor box, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5064973 Summary of the Invention [Problem to be solved by the invention]

[0005] The frame structure of conventional weight inspection equipment had the problem of low rigidity. In order to ensure rigidity while still performing stable weighing, the weight of the equipment would increase, making it difficult to reduce its weight.

[0006] An object of the present invention is to provide a weight inspection device that can increase the rigidity of the base while also reducing its weight. [Means for solving the problem]

[0007] A weight inspection device according to one embodiment of the present invention comprises a transporting and weighing unit that weighs an object to be inspected while transporting the object in a transport direction, and a base that supports the transporting and weighing unit, wherein the base has at least four support columns arranged in a position that does not overlap with the transporting and weighing unit in a planar view, and at least four beam columns that are each connected to any two of the support columns and form a rectangle in a planar view, and the beam columns include a pair of first beam columns that are each connected to two support columns that are aligned in the transport direction, and the height of the upper end of at least one of the first beam columns is the same as or higher than the height of the transport surface of the transporting and weighing unit.

[0008] According to this weight inspection device, at least four beams are arranged to form a square in a plan view, and each beam is connected to a support. This increases the rigidity of the stand. Vibrations can have a negative effect on the weighing of an object to be inspected. By increasing the rigidity of the stand, the weight inspection device is less susceptible to the effects of vibrations. It is also easy to reduce the weight of all or part of the four beams while maintaining rigidity. This makes it possible to reduce the weight of the stand.

[0009] The beam section may include a pair of second beam sections connected to two support sections aligned in a width direction perpendicular to the conveying direction, and the height of the second beam sections may be lower than the height of the two support sections. In this case, the center of gravity of the platform is lowered, thereby improving stability.

[0010] The transporting and weighing unit may be supported by the second beam unit. Since the transporting and weighing unit is supported at a lower position on the platform, the center of gravity of the entire weight checking device is lowered, improving stability.

[0011] The second beam may be shorter than the first beam. Since the transporting and weighing unit is supported by the relatively short second beam, the platform can stably support the transporting and weighing unit. Resistance to vibration is also improved.

[0012] The beam section may include a pair of long beam sections forming the long sides of a rectangle and a pair of short beam sections forming the short sides of the rectangle, and the conveying and weighing section may be supported by the short beam sections. Since the conveying and weighing section is supported by the short beam sections, the frame can stably support the conveying and weighing section. Resistance to vibration is also improved. [Effects of the Invention]

[0013] According to the present invention, the rigidity of the pedestal is increased, and furthermore, the weight of the pedestal can be reduced. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a front view of a weight inspection device according to an embodiment. [Figure 2] FIG. 2 is a perspective view of the weight checker of FIG. 1. [Figure 3] FIG. 2 is a side view (as seen from the upstream side) of the weight checker of FIG. 1. [Figure 4] FIG. 2 is an enlarged front view showing the vicinity of the conveying and measuring unit. [Figure 5] FIG. 2 is a plan view of the platform and the transport and weighing unit. [Figure 6] FIG. 10 is a perspective view showing a state in which the intake conveyor unit and the weighing conveyor unit are removed. [Figure 7] FIG. [Figure 8] FIG. 8(a) is a diagram showing a mounting structure of the sensor on the first beam, and FIG. 8(b) is a diagram showing the mounting structure of FIG. 8(a) as viewed from below the first beam. [Figure 9]FIG. 10 is a front view showing a pedestal according to a modified example and a transporting and weighing unit supported by the pedestal. DETAILED DESCRIPTION OF THE INVENTION

[0015] A weight inspection device 100 according to one embodiment will be described below with reference to the drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicate explanations will be omitted. In the following description, the terms "upper" and "lower" correspond to the up and down vertical directions as shown in FIG. 1, and the terms "upstream" and "downstream" refer to the upstream and downstream directions in the conveying direction TD of the inspection object P.

[0016] The weight inspection device 100 is an apparatus that inspects whether the weight of an object P to be inspected, supplied from the upstream side, is within an allowable range while transporting the object P to the downstream side. As shown in FIG. 1, the weight inspection device 100 mainly includes a weight inspection device 1, a main body 40, and a stand 50.

[0017] The transport and weighing unit 20 is attached to a stand 50, and has an intake unit 10 arranged on the upstream side (left side in the figure) and a weighing device 30 arranged on the downstream side (right side in the figure).

[0018] The intake unit 10 of the transporting and weighing unit 20 receives and transports the object P to be inspected from the upstream side, and delivers the object P to the weighing device 30 located downstream. The intake unit 10 includes an intake conveyor 11 and a drive unit 15.

[0019] The intake conveyor 11 has a conveyor frame 12, a drive roller 13A, a driven roller 13B, and a transport belt 14. The conveyor frame 12 is supported by a pair of support members 61 arranged on the front and rear sides of the intake conveyor 11. The drive roller 13A and the driven roller 13B are rotatably attached to the upstream and downstream sides of the conveyor frame 12 in the transport direction TD, respectively. The transport belt 14 is an endless belt that is wound around the drive roller 13A and the driven roller 13B.

[0020] The drive unit 15 drives the intake conveyor 11. The drive unit 15 has a drive motor 16 and a motor box 17. The drive motor 16 rotates the drive roller 13A. The motor box 17 houses the drive motor 16. The motor box 17 is fixed to a base member 58 of the stand 50 (described in detail later) via a support member 61. The motor box 17 may also be fixed directly to the base member 58 of the stand 50. The drive motor 16 transmits a driving force to the drive roller 13A via a timing belt 18, causing the drive roller 13A to rotate. This causes the conveyor belt 14 to rotate between the drive roller 13A and the driven roller 13B, and the inspection object P on the conveyor belt 14 is conveyed to the conveying and weighing unit 20.

[0021] The weighing device 30 of the transporting and weighing unit 20 weighs the weight of the inspection object P while transporting the inspection object P handed over from the intake unit 10. The weighing device 30 includes a transport unit 20A and a weighing unit 20B. The transport unit 20A transports the inspection object P. The transport unit 20A includes a transport conveyor 21 and a drive unit 25.

[0022] In this embodiment, the conveying direction TD of the transfer conveyor 21 is horizontal and is the same as the conveying direction TD of the intake conveyor 11. The transfer conveyor 21 has a conveyor frame 22, a drive roller 23A, a driven roller 23B, and a conveying belt 24. The conveyor frame 22 is supported by a pair of support members 62 arranged on the front and rear sides of the conveying and weighing section 20. The drive roller 23A and the driven roller 23B are rotatably attached to the upstream and downstream sides of the conveyor frame 22 in the conveying direction TD, respectively. The conveying belt 24 is an endless belt wound around the drive roller 23A and the driven roller 23B.

[0023] The drive unit 25 drives the transport conveyor 21. The drive unit 25 has a drive motor 26 and a motor box 27. The drive motor 26 rotates the drive roller 23A. The motor box 27 houses the drive motor 26. The motor box 27 is fixed to the base member 58 of the stand 50 via a support member 62. The motor box 27 may be fixed directly to the base member 58 of the stand 50. The drive motor 26 transmits a driving force to the drive roller 23A via a timing belt 28, causing the drive roller 23A to rotate. This causes the transport belt 24 to rotate between the drive roller 23A and the driven roller 23B, and the inspection object P on the transport belt 24 is transported downstream.

[0024] The weighing unit 20B weighs the weight of the object P to be inspected on the transporting unit 20A. The weighing unit 20B includes a load cell 31 and a weighing box 32. The load cell 31 detects a change in strain caused by the object P to be inspected being placed on the transporting unit 20A, and measures the weight of the object P to be inspected placed on the transporting unit 20A. The weighing box 32 is fixed to the base member 58 of the stand 50. The weighing box 32 houses the load cell 31.

[0025] The main body 40 is disposed behind the weighing device 30. The main body 40 has a housing 41, a control unit 42, a display operation unit 43, and a power switch 44. The main body 40 is fixed to the lower beam 55 of the stand 50.

[0026] The housing 41 is a vertically long housing extending in the vertical direction. The control unit 42 is housed inside the housing 41. The control unit 42 controls the operation of each unit of the weight inspection device 100. The control unit 42 is composed of, for example, a CPU, a ROM, a RAM, etc. The control unit 42 receives a weighing signal output from the load cell 31 and determines whether the weighing value indicated by the weighing signal is within a predetermined allowable range.

[0027] The display operation unit 43 is provided on the top of the housing unit 41. The screen 43a of the display operation unit 43 displays information related to the weighing performed by the weighing device 30. For example, the screen 43a of the display operation unit 43 displays the results of the judgment made by the control unit 42. The power switch 44 turns the power of the weight inspection device 100 on and off.

[0028] Next, with reference to FIGS. 1 to 5 and 7, the configuration of the platform 50 and the relative positions of the components of the platform 50 and the transporting and weighing unit 20 will be described. As shown in FIGS. 1 to 3, the platform 50 supports the transporting and weighing unit 20. That is, the platform 50 supports both the intake unit 10 and the weighing device 30. The platform 50 has four support columns 51, 52 erected on the installation surface (ground) F of the weight inspection apparatus 100. The four support columns 51, 52 extend linearly, for example, in the vertical direction and are parallel to each other. More specifically, the platform 50 has a pair of left support columns 51 disposed on the upstream side and a pair of right support columns 52 disposed on the downstream side. The pair of left support columns 51 are disposed so as to be spaced apart at a predetermined interval in the width direction (front-rear direction) perpendicular to the transport direction TD. The pair of right support columns 52 are disposed so as to be spaced apart at a predetermined interval in the width direction (front-rear direction) perpendicular to the transport direction TD. The four support columns 51, 52 are arranged at the vertices of a rectangle in plan view. The distance between the pair of left support columns 51 and the distance between the pair of right support columns 52 are, for example, equal, and the transporting and weighing unit 20 is contained within this front-to-rear distance range. As shown in FIG. 5, the four support columns 51, 52 are arranged in positions that do not overlap with the transporting and weighing unit 20 in plan view. The four support columns 51, 52 are arranged around the transporting and weighing unit 20 (around it in the horizontal direction). Each of the support columns 51, 52 is made of, for example, a circular tubular member made of metal.

[0029] In the following description, of the pair of left support columns 51, the one located on the front side may be referred to as the left support column 51A, and the one located on the rear side may be referred to as the left support column 51B. Of the pair of right support columns 52, the one located on the front side may be referred to as the right support column 52A, and the one located on the rear side may be referred to as the right support column 52B. As described above, the left support column 51A, left support column 51B, right support column 52A, and right support column 52B are parallel to one another and extend, for example, in the vertical direction. In this embodiment, the heights (i.e., lengths) of the left support column 51A, left support column 51B, right support column 52A, and right support column 52B are equal to each other, with respect to the installation surface F.

[0030] The platform 50 has a pair of upper beams (first beams) 53 and a pair of lower beams 55 connected to a left support column 51 and a right support column 52 aligned in the transport direction TD. As shown in FIGS. 2 and 7, the upper beam 53 is connected to, for example, an upper end 51a of the left support column 51 and an upper end 52a of the right support column 52. The lower beam 55 is connected to, for example, a lower portion 51b of the left support column 51 and a lower portion 52b of the right support column 52. Each of the upper beam 53 and the lower beam 55 is made of, for example, a metal rectangular tubular member. Either or both of the upper beam 53 and the lower beam 55 may be a member with a C-shaped cross section that opens downward. The lower surface of the upper beam 53 has, for example, an opening 53e extending in the longitudinal direction and a pair of lower surface pieces 53f that form the opening 53e (see FIG. 8(b)).

[0031] In the following description, the front one of the pair of upper beam portions 53 may be referred to as the upper beam portion 53A, and the rear one as the upper beam portion 53B. The front one of the pair of lower beam portions 55 may be referred to as the lower beam portion 55A, and the rear one as the lower beam portion 55B. One upper beam portion 53A and one lower beam portion 55A are fixed to the left support column 51A and the right support column 52A, which are aligned in the conveying direction TD. One upper beam portion 53B and one lower beam portion 55B are fixed to the left support column 51B and the right support column 52B, which are aligned in the conveying direction TD. The housing portion 41 of the main body portion 40 is attached to the lower beam portion 55B via a bracket 47. The upper beam portion 53A, the upper beam portion 53B, the lower beam portion 55A, and the lower beam portion 55B are parallel to one another and extend, for example, horizontally. The upper beam portion 53A, the upper beam portion 53B, the lower beam portion 55A, and the lower beam portion 55B have the same length.

[0032] The platform 50 includes a left horizontal beam (second beam) 56 connected to a pair of left support columns 51 aligned in the width direction (front-rear direction), and a right horizontal beam (second beam) 57 connected to a pair of right support columns 52 aligned in the width direction (front-rear direction). The left horizontal beam 56 and the right horizontal beam 57 are fixed to the vertical centers of the left support columns 51 and the right support columns 52. The left horizontal beam 56 and the right horizontal beam 57 both extend horizontally and are located at a height between the upper beam 53 and the lower beam 55. The height of the left horizontal beam 56 is lower than the height of the left support column 51A and the height of the left support column 51B. The height of the right horizontal beam 57 is lower than the height of the right support column 52A and the height of the right support column 52B. Each of the left horizontal beam 56 and the right horizontal beam 57 is formed, for example, from a circular tubular member made of metal. The left horizontal beam section 56 and the right horizontal beam section 57 are parallel to each other and extend, for example, horizontally. The length of the left horizontal beam section 56 and the length of the right horizontal beam section 57 are equal. The height of the left horizontal beam section 56 and the height of the right horizontal beam section 57 are equal.

[0033] The platform 50 further includes a base member 58 spanning between the left horizontal beam 56 and the right horizontal beam 57. The base member 58 extends, for example, horizontally. The base member 58 extends, for example, parallel to the installation surface F. The base member 58 is made of, for example, a metal member with a C-shaped cross section that opens downward. The base member 58 includes a flat top panel 81. The motor box 17 of the drive unit 15, the motor box 27 of the drive unit 25, and the weighing box 32 are fixed to the top panel 81 of the base member 58 using appropriate fastening members (bolts and nuts, screws, etc.). The top panel 81 is an attachment surface or installation surface for attaching the transporting and weighing unit 20 to the platform 50. A rectangular opening 81e having an area approximately 1 / 2 to 1 / 4 of the area of ​​the top panel 81 is formed in the central region of the top panel 81.

[0034] The upper beam portion 53, the lower beam portion 55, the left horizontal beam portion 56, and the right horizontal beam portion 57 are connected to the support portions 51 and 52, respectively, by, for example, welding. The base member 58 is connected to the left horizontal beam portion 56 and the right horizontal beam portion 57 by, for example, welding. Note that the connection method is not limited to welding, and may be, for example, adhesive bonding, or a fixing bracket or the like and a fastening member.

[0035] As shown in Fig. 5, in the frame 50, the two upper beam sections 53 (upper beam section 53A and upper beam section 53B) and the left horizontal beam section 56 and right horizontal beam section 57 form a quadrangle in a plan view. In a plan view, the conveying and weighing section 20 is disposed within (within) the quadrangle formed by the two upper beam sections 53 and the left horizontal beam section 56 and right horizontal beam section 57. More specifically, as shown in Fig. 6, in a plan view, the motor box 17, the motor box 27, and the weighing box 32 are disposed within (within) the quadrangle formed by the two upper beam sections 53 and the left horizontal beam section 56 and right horizontal beam section 57.

[0036] More specifically, in the frame 50, the left horizontal beam section 56 and the right horizontal beam section 57 are both shorter than the upper beam section 53. In other words, the quadrangle formed by the four (four sides) frame-shaped beam sections, namely the pair of upper beam sections 53, the left horizontal beam section 56, and the right horizontal beam section 57, is a rectangle. The pair of upper beam sections 53 are a pair of long-side beam sections that form the long sides of the rectangle. The left horizontal beam section 56 and the right horizontal beam section 57 are a pair of short-side beam sections that form the short sides of the rectangle.

[0037] 1 to 4, the conveying and weighing unit 20 is supported by a base member 58. That is, the intake unit 10 and the weighing device 30 are supported by the base member 58. In other words, the conveying and weighing unit 20 is supported by the left horizontal beam unit 56 and the right horizontal beam unit 57 via the base member 58.

[0038] 1 and 4, the conveying surface 14a of the conveying belt 14 of the intake conveyor 11 and the conveying surface 24a of the conveying belt 24 of the transport conveyor 21 are located at the same height. In other words, the conveying surfaces 14a and 24a are located on the same plane. The object P to be inspected is transferred from the conveying surface 14a to the conveying surface 24a, and a gap X having a minute width (length in the transport direction TD) is formed between the intake conveyor 11 and the transport conveyor 21.

[0039] The height of the upper beam portion 53A connected to the upper end portion 51a of the left support portion 51A and the upper end portion 52a of the right support portion 52A is equal to the height of the upper beam portion 53B connected to the upper end portion 51a of the left support portion 51B and the upper end portion 52a of the right support portion 52B. In this embodiment, the heights of the upper beam portions 53A and 53B are the same as the heights of the conveying surfaces 14a and 24a. In other words, assuming that the installation surface F is a flat plane, the distance from the installation surface F to the upper end surfaces (upper ends) 53c of the upper beam portions 53A and 53B is equal to the distance from the installation surface F to the conveying surfaces 14a and 24a. The upper end surfaces 53c of the upper beam portions 53A and 53B are flush with the upper end surfaces of the two left support portions 51 and the two right support portions 52.

[0040] The platform 50 is provided with four support columns, namely, a left support column 51 and a right support column 52, surrounding the transporting and weighing unit 20. As shown in Fig. 5, the transporting and weighing unit 20 is disposed between the right support column 52A and the upper beam column 53B in the front-to-rear direction. In addition, when viewed from above, the transporting and weighing unit 20 is disposed between the left horizontal beam column 56 and the right horizontal beam column 57 in the left-right direction (transport direction TD).

[0041] As shown in FIG. 2 , the upper beams 53A and 53B are disposed to the sides of the conveyor belts 14 and 24. This arrangement allows the upper beams 53A and 53B, which are part of the platform 50, to function as protective members for the intake conveyor 11 and the transport conveyor 21. In a conventional configuration in which the platform 50 is disposed below the transporting and weighing unit 20, support arms extending in the front-to-rear and up-to-down directions are attached to inverted U-shaped legs, and bumper members are provided at the upper ends of the support arms. The bumper members extending in the transport direction serve to protect the transport unit of the transporting and weighing unit. In the weight inspection device 100 of this embodiment, the upper beam 53 is provided to bridge the upper ends (or upper portions) of two support columns aligned in the transport direction TD, protecting the transport unit 20A (transport conveyor 21) of the transporting and weighing unit 20. Separate members such as the conventional support arms are not required; a part of the platform 50 functions as a bumper.

[0042] As shown in FIGS. 8(a) and 8(b), for example, electrical components or members can be attached to the upper beam portion 53. As an example, a photoelectric sensor 70 can be attached to the upper beam portion 53B. A fixture 71 is fixed to the pair of lower surface pieces 53f through the opening 53e of the upper beam portion 53B, and the photoelectric sensor 70 is fixed to a holder 72 integrated with the fixture 71. The photoelectric sensor 70 is disposed near the gap X between the intake conveyor 11 and the transfer conveyor 21 and detects the object P to be inspected as it is transferred from the intake conveyor 11 to the transfer conveyor 21. In addition to the photoelectric sensor 70, various other devices can be attached to the upper beam portion 53. For example, an emergency stop switch that can be operated by an operator may be provided. For ease of use, such an operating device is attached to the front upper beam portion 53A of the pair of upper beam portions 53.

[0043] According to the weight inspection device 100 of this embodiment, at least four beams 53, 56, and 57 are arranged to form a square in a plan view, and each beam 53, 56, and 57 is connected to the support columns 51 and 52. This increases the rigidity of the platform 50. Vibrations can adversely affect the weighing of the inspection object P. By increasing the rigidity of the platform 50, the weight inspection device 100 is less susceptible to vibrations. Furthermore, it is easy to reduce the weight of all or part of the four beams 53, 56, and 57 while maintaining rigidity. This allows for a reduction in the weight of the platform 50. Conventionally, when a separate bumper is required, the bumper hinders weight reduction. In the weight inspection device 100 of this embodiment, the platform 50 also functions as a bumper, thereby achieving a reduction in weight. From the perspective of rigidity, the platform 50 is also less prone to twisting (it is resistant to external forces in the twisting direction). Equipment can be attached to the upper beam portion 53, which is located at a high position, improving operability for workers.

[0044] The heights of the left horizontal beam section 56 and the right horizontal beam section 57 are lower than the heights of the support columns 51 and 52. This lowers the center of gravity of the platform 50, thereby improving stability.

[0045] The conveying and weighing unit 20 is supported by the left horizontal beam unit 56 and the right horizontal beam unit 57. Because the conveying and weighing unit 20 is supported at a lower position on the platform 50, the center of gravity of the weight inspection device 100 as a whole is lowered, improving stability.

[0046] Furthermore, since the conveying and weighing unit 20 is supported by the left horizontal beam 56 and the right horizontal beam 57 that form the shorter sides of the rectangle, the platform 50 can stably support the conveying and weighing unit 20. Furthermore, resistance to vibration is also improved.

[0047] From another perspective, since the conveying and weighing unit 20 is supported by the left horizontal beam unit 56 and the right horizontal beam unit 57, which are short side beam units, the platform 50 can stably support the conveying and weighing unit 20. Furthermore, resistance to vibration is also improved.

[0048] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. For example, in the above-described embodiments, the heights of the upper beam portions 53A and 53B are the same as the heights of the conveying surfaces 14a and 24a, but the present invention is not limited to this example. As shown in Fig. 9, a platform 50A may be employed in which the heights of the upper beam portions 53A and 53B are higher than the heights of the conveying surfaces 14a and 24a.

[0049] In the above embodiment, the first beam section is longer than the second beam section. That is, the first beam section is a long beam section and the second beam section is a short beam section, but this is not limiting. The second beam section may be longer than the first beam section. That is, the second beam section may be a long beam section and the first beam section may be a short beam section. In this case, the conveying and weighing section may be supported by the second beam section, but this is not necessary. The conveying and weighing section may be supported by the first beam section as a short beam section. An appropriate bracket is fixed to the first beam section, and the conveying and weighing section is supported by the bracket. The bracket may be provided at a position lower than the upper end of the first beam section and fixed to the lower part or underside of the conveying and weighing section.

[0050] The height of the second beam section may be the same as or higher than the height of the support section. In this case, the second beam section may be positioned so as not to interfere with the conveying and weighing section so as not to impede the function of the conveying and weighing section.

[0051] The height of upper beam portion 53A and the height of upper beam portion 53B may be different. In this case, the height of the upper end of only one of the pair of upper beam portions 53 may be the same as the height of the conveying surface 24a of the conveying and weighing unit 20 or may be higher than the height of the conveying surface 24a. The upper end of the other of the pair of first beam portions may be lower than the height of the conveying surface 24a of the conveying and weighing unit 20. In other words, it is sufficient that the height of the upper end of at least one of the upper beam portions 53 is the same as the height of the conveying surface 24a of the conveying and weighing unit 20 or higher.

[0052] The structure of the conveying and weighing unit may also be modified in various ways. For example, a structure in which a weighing box is incorporated into the conveying unit may be adopted.

[0053] The intake unit 10 may be omitted. In that case, the base 50 may support only the weighing device 30. In the base 50, the lower beam unit 55 may be omitted.

[0054] The quadrangle formed by the four beam sections in plan view may be a square. [Explanation of symbols]

[0055] 10...intake section, 11...intake conveyor, 20...transport and weighing section, 20B...weighing section, 21...transport conveyor, 50...frame, 51, 51A, 51B...left support section, 52, 52A, 52B...right support section, 53, 53A, 53B...upper beam section (first beam section), 55, 55A, 55B...lower beam section, 56...left horizontal beam section (second beam section), 57...right horizontal beam section (second beam section), 58...base member, 81...top panel section, F...installation surface, TD...transport direction, P...object to be inspected, X...gap section.

Claims

1. a conveying and weighing unit that conveys the object to be inspected in a conveying direction while weighing the object; a platform supporting the conveying and weighing unit, The frame is At least four support columns arranged at positions that do not overlap the transporting and weighing section in a plan view; At least four beam portions each connected to any two of the support portions and forming a quadrangle in a plan view, the beam portion includes a pair of first beam portions respectively connected to two support columns aligned in the conveying direction, and a height of an upper end of at least one of the first beam portions is the same as or higher than a height of a conveying surface of the conveying and weighing unit; A weight inspection device wherein the beam section includes a pair of long side beam sections that form the long sides of the rectangle and a pair of short side beam sections that form the short sides of the rectangle, and the conveying and weighing section is supported by the short side beam sections.

2. 2. The weight inspection device according to claim 1, wherein the beam portion includes a pair of second beam portions each connected to two support portions aligned in a width direction perpendicular to the conveying direction, and the height of the second beam portions is lower than the height of the two support portions.

3. The weight inspection device according to claim 2 , wherein the transporting and weighing unit is supported by the second beam unit, which is the short-side beam unit.

4. The weight inspection device according to claim 3 , wherein the second beam portion is shorter than the first beam portion, which is the long side beam portion.

Images