JP2509775Y2 - Vibration prevention device and connecting part - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is used in a state where a scale main body is hung from a ceiling or a beam through a suspension portion, and a dish on which an item to be weighed is placed. In a hanging dish type balance with a suspended structure, a vibration preventive device is provided at the connecting part between the balance body and the hanging plate to stabilize the measured value quickly, and the balance body and hanging plate, the hanging part and the balance body Regarding the connection part.

[Conventional technology]

As a hanging plate type scale, for example, one shown in FIG. 11 is well known. In the figure, 1 is a beam, 2 is a hanging portion, 3 is a scale main body, and 4 is a hanging tray. The suspension part 2 is an iron pipe fixed to the beam 1, and a support shaft 5 protruding from the upper center of the balance main body 3 is inserted into the lower end part of the iron pipe and fixed with a thumbscrew 2a. The hanging tray 4 is the hanging arm 6
And a bolt insertion hole is provided at the center of the upper part of the arm 6, and a load applying bolt 7 protruding downward from the lower center of the main body 3 is inserted into the insertion hole, and a nut 8 is screwed into the bolt 7. Accordingly, the hanging tray 4 is hung.
In such a suspended tray type balance, the balance main body 3 needs to be horizontal.

In addition to this, there is one in which the connecting portions between the suspension portion 2 and the balance main body 3 and between the balance main body 3 and the suspension tray 4 are formed by an annular member and an annular hook that are engaged with each other.

[Problems to be solved by the device]

The conventional structure shown in FIG. 11 has a structure in which the nut 8 of the connecting portion is screwed into the load applying bolt 7 and the hanging tray 4 is fixed to the scale main body 3. When an article is placed on the hanging tray 4, a downward impact received by the hanging tray 4 causes the end of, for example, a load cell (not shown) of the balance body 3 that is coupled to the hanging tray 4 to vibrate in the vertical direction. This will prolong the time required for stabilization. Therefore, there is a problem that when the article is placed on the hanging tray 4, the work must be performed with care so as not to vibrate as much as possible.

In addition, this conventional structure has a structure that is fixed by tightening the thumbscrew 2a and the nut 8 of the connecting portion, and such a structure tends to be relatively easily attached and detached. It is not. When changing the layout of the store, it is necessary to change the orientation of the scale main body 3 and the orientation of the hanging tray 4, but this is not done so often, and the thumbscrew 2a and nut 8 should not be used enough. Often tightly tightened. Therefore, since it is difficult to loosen them easily, there is a problem that it is difficult to easily change the directions of the balance main body 3 and the hanging tray 4.

Further, in the case where the connecting portion is formed by the ring member and the annular hook which are not the screw type as described above, it is easy to change the direction by 180 degrees, but the direction is set at another angle such as 90 °.
The problem is that you cannot change it once. Moreover, since this structure has a fixed structure, it shakes, so that it takes a long time to stabilize the balance during weighing, and when the article is placed on the hanging pan 4, care must be taken not to shake it as much as possible. There are some problems that cannot be solved.

This invention proposes a vibration preventive device for a hanging tray type balance that stops vertical vibrations of the hanging tray 4 and an article that occur when an object is placed on the hanging tray 4 in a shorter time than before, and a vertical vibration and shake. Therefore, it is an object of the present invention to provide a connecting portion in which the balance main body 3 and the hanging tray 4 can be easily changed in directions, and the directions can be changed in all directions of 360 degrees.

[Means for solving the problem]

A vibration preventing device for a hanging dish type balance according to a first aspect of the present invention is a hanging plate type balance comprising: a balance main body; and a hanging plate suspended from the balance main body via the vibration preventing device. However, a cylindrical holding part whose upper part is connected to the balance main body, and between the scale main body and the hanging pan when a load within the weighing range is supported on the hanging pan supported by the holding part. A shock-absorbing material that absorbs shocks and vibrations that pass through, and a base end portion that is locked to the upper surface of the shock-absorbing material. And a suspending part which is a connecting part for projecting the projecting end part to be connected to the hanging tray.

The connecting part in the hanging plate type balance of the second invention is a hanging plate type balance comprising a balance main body, a hanging part for suspending the balance main body in a state of being used, and a hanging plate hanging down from the balance main body. A connecting portion is provided between the balance main body and the hanging portion and between the balance main body and the hanging tray, the connecting portion including a first member and a second member that are engaged with each other and are removable, 1 member
From a shaft portion protruding from one connected portion toward the other connected portion, and a flange-shaped retaining portion that is enlarged in the direction perpendicular to the axis of the shaft portion that is provided coaxially following the shaft portion. The second member includes a support portion projecting from the other connected portion to both sides of the flange-shaped retaining portion, a support plate integrally provided over the support portions on both sides, and a support thereof. A groove extending from the edge portion of the plate on the side of the supporting portion and through which the shaft portion is inserted to engage the flange-shaped retaining portion with the supporting surface of the supporting plate, and one side of the supporting portion continuous to the groove. And a passage portion through which the shaft portion of the first member passes through the first member in a positional relationship of passing through the groove portion, a surface of the retaining portion engaged with a support surface of the support plate, and the detachment. Provided on at least one of the supporting surfaces of the supporting plate engaged with the stopper It has a large surface friction coefficient, and is composed of the balance main body, the hanging portion, and a cushioning material that absorbs shocks and vibrations passing through the hanging tray when a load within the weighing range is applied to the hanging tray. It is what

[Action]

In the first invention, the impact generated when the article is placed on the hanging tray is transmitted from the hanging portion connected to the hanging tray to the end of the load cell of the balance main body through the cushioning material and the holding portion. Then, the end portion of the load cell vibrates in the vertical direction due to this impact, and this vibration is transmitted from the holding portion to the hanging tray via the cushioning material and the hanging portion. But,
The holding portion that supports the cushioning material and the base end portions of the hanging portions support the hanging tray by receiving gravity acting as a force that compresses the cushioning material, so the impact received by the hanging tray and the end portion of the load cell Vibrations are absorbed as they pass through the cushioning material, and vertical vibrations of the hanging tray immediately stop. That is, when a load within the weighing range is applied to the hanging tray, the cushioning material repeats compression and restoration to the extent corresponding to the magnitude of the load, and the vibration immediately stops. Then, when the vibration is stopped, the cushioning material is in a state of being compressed by the load received.

In the second invention, in the engaged state, the first member and the second member are pulled by abutting the supporting surface of the supporting plate and the flange-shaped retaining portion through the cushioning material having a large surface friction coefficient. Supports gravity acting as force. Then, the vertical vibration of the hanging tray caused by the impact when the article is placed on the hanging tray is absorbed by the cushioning material and stopped in a short time. That is, when a load within the weighing range is applied to the hanging pan, the vibration of compression and restoration of the cushioning material is immediately stopped as in the first invention. Then, when the vibration is stopped, the cushioning material is in a state of being compressed by the load received. Further, as for the connection state of both connected parts in the connecting part, all rotational positions of 360 degrees can be selected in relation to the groove and the shaft part. The operation of changing the rotational position is performed by the first member and the second member.
The member is displaced in the direction in which the connected portion is further approached to separate the contact between the cushioning material and the supporting surface of the support plate or between the cushioning material and the flange surface of the retaining portion, and then the desired rotation position is set. It suffices to displace the second member in the opposite direction to engage the support surface and the flange surface via the cushioning material.

〔Example〕

An embodiment including the first device and the second device will be described. First, the structure of the vibration preventing device of the first invention will be described with reference to FIGS. 1 to 7. In the figure, 11 is a balance main body, 12 is a hanging portion, 13 is a hanging tray, 59 is a holding portion, 61
Is a cushioning material, and 62 is a hanging part.

As shown in FIGS. 2 and 3, the scale main body 11 has similar display portions 17 and 17a on both front and back surfaces, and a first metal fitting 14 protruding upward is provided at the center of the upper surface portion. An anti-vibration device 54 protruding downward is provided at the center of the lower surface portion.
The first metal fitting 14 on the upper side is a load cell 55 as shown in FIG.
It is provided so as to project from the upper surface of the load cell receiving fitting 56 that is coupled to the left end of the balance main body 11 so as to suspend the scale main body 11.
The lower vibration preventive device 54 is engaged with a load applying shaft 58 that is fixed by tightening the nut 25 to the lower surface of the load cell receiving metal fitting 57 that is coupled to the right end portion of the load cell 55. It suppresses 13 vibrations.

The hanging part 12 is rod-shaped and has an upper end fixed to a ceiling or a beam as in the conventional case, and a second metal fitting 15 is provided at the lower end.

An enlarged view of the first metal fitting 14 and the second metal fitting 15 is shown in FIG. The first metal fitting 14 includes a convex portion 19 protruding from the upper surface of the load cell receiving metal fitting 56 and a through hole 20. Through hole 20
Are provided so as to horizontally cross the central portion of the convex portion 19 and be orthogonal to each other. The second metal fitting 15 is fixedly provided on the lower end of the hanging portion 12, and includes an extension portion 22 extending downward, a horizontal portion 23, and a return portion 24. In the engaged state shown in the drawing, the extension portion 22 reaches one end of the through hole 20 of the first metal fitting 14, the horizontal portion 23 passes through the through hole 20 to reach the other end, and slightly extends upward from the other end. The return part 24 is formed. FIG. 7 shows the second fitting 15 as one through hole of the first fitting 14.
It is a figure which shows the state which removed from 20 and engaged this 2nd metal fitting 15 with the other through-hole 20 of the 1st metal fitting 14. As described above, since the suspending portion 12 and the balance main body 11 are connected via the first metal fitting 14 and the second metal fitting 15, the connection state can be changed in four ways. Therefore, the directions of the display units 17 and 17a of the balance main body 11 with respect to the suspension unit 12 can be changed in four ways.

The hanging tray 13 has one curved arm 18, and the curved arm 18 horizontally supports the tray 13a at a lower portion thereof, and has a second member 45 formed at an upper end portion thereof.

As shown in FIG. 1, the holding portion 59 has a tubular body 60 having a circular cross section. The upper portion of the tubular body 60 engages with the load applying shaft 58 of the balance main body 11, and the lower portion has a cushioning material 61. Via the hanging part 62
I support. The upper portion of the cylindrical body 60 is provided with one annular groove on the inside thereof, and a C-shaped concentric snap ring 63 is fitted into this groove. On the other hand, on the outer periphery of the lower end of the load applying shaft 58,
An annular groove is provided, and an E-shaped retaining ring 64 is fitted in this groove. Then, an annular metal plate 65 is disposed between the lower surface of the C-shaped concentric snap ring 63 and the upper surface of the E-shaped snap ring 64 so that the tubular body 60 is engaged with the load applying shaft 58 and droops. I am letting you. Reference numeral 66 denotes a compression spring, which is inserted through the load applying shaft 58 and has a lower end portion which presses the annular metal plate 67 placed on the upper surface of the C-shaped concentric snap ring 63 downward to make the cylindrical body 60. Does not rattle against the load applying shaft 58. Furthermore, the cylinder
A C-shaped concentric snap ring 63 is fitted into one annular groove that is bored inward at the bottom of 60, as with the top.
Holds the hanging part 62. However, this metal plate 6
A gap S is formed between the inner peripheral surface of 5, 67 and the outer peripheral surface of the load applying shaft 58.
Therefore, as shown in FIGS. 4 and 5, the holding portion 59 has the lower portion of the tubular body 60 inclined with respect to the hanging line with the upper portion of the tubular body 60 and the load applying shaft 58 engaged with each other. It is possible to rotate 360 degrees in the range of.

As shown in FIG. 1, the hanging portion 62 has a shaft 69 whose outer diameter is smaller than that of its lower portion, and a male screw portion 70 is formed on the upper end of this shaft 69. The nominal diameter of the male screw portion 70 is smaller than the outer diameter of the upper portion of the shaft 69. The shaft 69 has an outer diameter smaller than the inner diameter of the tubular body 60, an annular metal plate 71 between the male screw portion 70 and the step portion at the boundary of the upper portion, and a metal plate 72 of the same shape as the upper portion. Each of them is engaged with a step portion at the boundary of the lower portion one by one, and a columnar rubber cushioning material 61 inserted through a shaft 69 is sandwiched between the two metal plates 71, 72. . Then, the upper metal plate 71 is fixed to the shaft 69 by tightening the nut 73 that is screwed to the male screw portion 70, whereby the cushioning material 61 is fixed to the shaft 69. The first member 44 of the second invention is attached to the lower end of the shaft 69, and the second member 45 provided on the hanging tray 13 is engaged with the first member 44 to suspend the hanging tray 13. Can be lowered. Reference numeral 74 shown in the figure is an annular receiving metal fitting inserted through the shaft 69, the upper surface of which is in contact with the lower surface of the lower metal plate 72, and the lower surface of which is a cylindrical body.
The construction is such that it abuts against the upper surface of a C-shaped concentric snap ring 68 attached to the lower portion of 60, so that the cushioning material 61 is held inside the tubular body 60 and the shaft 69 is prevented from coming off the tubular body 60. There is. Further, reference numeral 26 shown in the drawing is a compression spring, which prevents the hanging portion 62 from rattling with respect to the holding portion 59. Reference numeral 27 denotes an exterior metal fitting that allows the hanging portion 62 to slide in parallel with the holding portion 59.

Next, the structure of the connecting portion of the second invention will be described with reference to FIGS. 1 to 3 and 8 to 10. In the figure, 44 is a first member, and 45 is a second member engaging with the first member.

As shown in FIG. 1, the first member 44 is provided at the lower end of the shaft 69 of the vibration preventive device 54, which is one connected part.
A shaft portion 46 formed by inserting a short cylindrical body at the lower end of the shaft portion, and a flange-like retaining portion that is enlarged in the direction perpendicular to the axis of the shaft portion 46 integrally provided therewith and coaxially provided therebelow. 48 are formed in sequence. Reference numeral 47 shown in the drawing is an E-shaped retaining ring, and the first member 44 is locked so as not to come off from the shaft 69. As shown in FIG. 1, a cushioning material 43 (for example, cushioning rubber) having a large surface friction coefficient is attached to the outer peripheral surface of the shaft portion 46 of the first member 44 and the upper surface of the retaining portion 48. This cushioning material
The reference numeral 43 eliminates rattling when the first member 44 and the second member 45 are engaged with each other and absorbs an impact when an article is placed on the hanging tray 13.

As shown in FIG. 9, the second member 45 is fixedly provided on the upper end of the bending arm 18 which is a connected portion located below the vibration preventing device 54, and is located on both front and rear sides of the upper end of the bending arm 18. It has a supporting portion 49 protruding to the left from. Its support
A support plate 51 is integrally provided over the upper edge of 49, and a semicircular hole 50 is formed in the center of the support plate 51. A groove 52 is provided so as to reach the hole 50 from the edge of the support plate 51. The hole 50 and the groove 52 are formed so that the shaft portion 46 to which the cushioning material 43 is attached can be inserted. Also the groove
A passage portion 53 is formed on one of the support portions 49 so as to be continuous with the passage portion 52. The passing portion 53 is, as shown in FIG.
The shaft portion 46 and the retaining portion to which the cushioning material 43 is attached respectively
The shape corresponds to the front shape of 48, and is a notch-shaped portion having a size that allows the first member 44 to pass through in the horizontal direction at the height position where the shaft portion 46 passes through the groove. A reinforcing plate 28 is integrally provided over the lower edges of the support portions 49 on both sides.

The operation of the hanging plate type balance thus constructed will be described.

The first member 44 and the second member 45 of the second invention are separated as shown in FIGS. 8 and 9, and FIG. 10 (b).
As shown in FIG. 5, the second member 45 can be attached to and detached from the engaged state, and the second member 45 can be changed to any angular position around the shaft portion 46 in the engaged state. Therefore, the position of the curved arm 18 of the hanging tray 13 can be changed according to the layout of the store or the convenience of the operator. Further, in order to change from the disengaged state to the engaged state, the first member 44 is moved to the height position where the first member 44 passes through the passage portion 53, that is, the second member 45 is lifted to make the hole 50.
When the shaft portion 46 to which the cushioning material 43 is attached is inserted into the shaft, the engagement state shown in FIG. 10 (b) is obtained. Also, the first member 44
The engagement state between the second member 45 and the second member 45 is such that the weight is supported by the surface contact between the upper surface of the retaining portion 48 and the lower surface (support surface) of the support plate 51, and the hole 50 and the shaft are also supported laterally. Cushioning material 43 on the outer periphery of the portion 46
Due to the contact with the hanging tray 13, the hanging tray 13 hardly shakes, and the vertical vibration when the article is placed on the hanging tray 13 can be absorbed. That is, as shown in FIG. 2 and FIG.
When an article having a weight within the weighing range is placed on the hanging tray 13 with the support plate 51 shown in FIG. 9 being engaged with the upper surface of the cushioning material 43 shown in the figure, the cushioning material 43 responds to the weight. Vibration stops immediately after repeated compression and decompression. Then, when the vibration is stopped, the cushioning material 43 is in a compressed state due to the weight of the received article.

Next, the operation of the vibration prevention device 54 of the first invention will be described. The impact generated when an article is placed on the hanging tray 13
It is transmitted to the end portion of the load cell 55 of the balance main body 11 from the suspension portion 62 coupled with the suspension material 61 and the holding portion 59.
Then, the end portion of the load cell 55 vibrates in the vertical direction due to this impact, and this vibration is transmitted from the holding portion 59 to the hanging tray 13 via the cushioning material 61 and the hanging portion 62. But,
The C-shaped retaining ring 68 of the holding portion 59 that supports the cushioning material 61 and the metal plate 71 fixed to the shaft 69 of the hanging portion 62 receive the gravity of the article placed on the hanging tray 13 as a force for compressing the cushioning material 61. Hanging plate 13
The shock received by the hanging tray 13 and the vibration of the end portion of the load cell 55 are absorbed when passing through the cushioning material 61, and the vertical vibration of the hanging tray 13 immediately stops.
As a result, the measured value can be read quickly. That is,
As shown in FIG. 1, cushioning material 61 without initial load
When a load within the weighing range is applied to the hanging tray 13, the vibration is immediately stopped by repeating compression and restoration to an extent according to the magnitude of the load. Then, in the state where the vibration is stopped, the cushioning material 61 is in a state of being compressed by the load received.

However, in this embodiment, as shown in FIG. 1, the cushioning material 43 having a large surface friction coefficient is attached to the outer peripheral surface of the shaft portion 46 of the first member 44 and the upper surface of the retaining portion 48. First member 44
The cushioning material 61 may be attached to the lower surface of the support plate 51 of the second member 45 and the inner peripheral surface of the hole 50 without being attached.

The suspension 12 and the balance main body 11 are connected via the first and second metal fittings 15, and the vibration preventing device 54 and the suspension tray 13 are connected via the first and second members 45. The connection can be made with the first and second members 44, 45 of the second invention.

In addition, in this embodiment, the balance main body 11 has a vibration prevention device.
54 and the connecting part are attached, but the first part is
It is possible to prevent the vibration of the hanging tray 13 in the vertical direction by attaching the vibration preventing device 54 of the invention and attaching a conventional connecting portion to the lower portion thereof. Further, the connecting portion of the second invention can be attached to the lower portion of the balance main body 11 to prevent the hanging tray 13 from vibrating in the vertical direction and shaking.

[Effect of device]

According to the first invention, since the holding portion and the hanging portion are connected via the cushioning material, when an article having a weight within the weighing range is placed on the hanging tray, a shock in the direction of gravity is applied to the hanging tray. The shock and vibration can be absorbed by the cushioning material, and thus, the time required for stabilizing the fluctuation of the measured value of the balance main body can be shortened as compared with the conventional case. Even if the hanging tray is shaken by the wind during the weighing of the article, the vertical vibration of the hanging tray is absorbed by this cushioning material, so that the vibration is difficult to be transmitted to the main body and therefore the fluctuation of the measured value is caused. Is small and stops quickly. As a result, there is an effect that the measured value can be read quickly.

According to the second invention, since the shaft portion is inserted into the corresponding groove, the engagement between the first member and the second member can be changed to any angular position around the vertical axis. You can Therefore, it is extremely easy to change the layout of the store or when the right-handed person and the left-handed person are replaced, and depending on the situation, do not perform any operation to loosen the screws, There is an effect that the directions of the dishes can be easily changed and they are hardly rocked in the left and right directions. Then, the rattling of the connecting portion can be eliminated by the cushioning material having a large surface friction coefficient. Furthermore,
Even if the hanging tray vibrates when an object with a weight within the weighing range is placed on the hanging tray, this cushioning material absorbs the vertical vibrations of the hanging tray and the scale body, and the fluctuation of the measured value is faster than before. The effect is that it can be stopped.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a vibration preventing device of the present invention, FIG. 2 is a front view of a main part of a hanging pan scale of the same embodiment, and FIG. 3 is a main view of a hanging pan balance of the same embodiment. 4 is a right side view, FIG. 4 and FIG. 5 are views showing a range in which the vibration preventing device of the embodiment can be tilted, and FIG. 6 is an engagement state of the first metal fitting and the second metal fitting of the same embodiment. (A) is a front view,
(B) is a sectional view taken along the line S ₁ -S ₁ of (a), FIG. 7 shows a different engagement state of the same first metal fitting and the second metal fitting, (a) is a side view,
8B is a sectional view taken along the line S ₂ -S _{2 of} FIG. 8A, FIG. 8 is a front view of a first member in one embodiment of the connecting portion, and FIG. 9 is a perspective view of a second member of the same embodiment. FIG. 10 is a view for explaining the engagement / disengagement process of the first member and the second member of the embodiment, (a) is a front view immediately before engagement, (b) is a vertical cross-sectional front view showing the engagement state, First
FIG. 11 is a front view showing a suspended state of a conventional hanging plate type balance. 11 …… Scale main unit, 12 …… Hanging part, 13 …… Hanging plate, 43…
… Cushioning material (of the first member), 44 …… First member, 45 ……
Second member, 46 ... Shaft, 47, 64 ... E-shaped retaining ring, 48 ...
Retaining part, 49 ... support part, 50 ... hole, 51 ... support plate,
52 …… Groove, 53 …… Passing part, 54 …… Vibration prevention device, 55 ……
Load cell, 59 …… Holding part, 61 …… Cushioning material (of anti-vibration device), 62 …… Suspension part, 63,68 …… C type snap ring, 69 …… Axis.

Claims (2)

(57) [Scope of utility model registration request] 1. A suspension tray type balance comprising a balance main body and a suspension tray suspended from the balance main body via a vibration preventive device, wherein the vibration preventive device has an upper portion coupled to the balance main body. And a cylindrical holding portion, which is supported in the holding portion and absorbs shocks and vibrations passing between the scale main body and the hanging tray when a load within the weighing range is applied to the hanging tray. And a base end portion that is locked to the upper surface of the cushioning material, and penetrates the cushioning material from the base end portion to project below the lower portion of the holding portion, and the projecting end portion serves as the hanging tray. An anti-vibration device for a hanging dish type balance, comprising: a suspending section which is a coupling section for coupling. 2. A hanging plate type balance comprising a balance main body, a hanging part for hanging the balance main body in a state of being used, and a hanging plate hanging from the balance main body, between the balance main body and the hanging part, and There is provided a connecting portion composed of a first member and a second member which are detachably engaged with each other at least between one of the balance main body and the hanging tray,
The first member includes a shaft portion projecting from one connected portion toward the other connected portion, and a flange shape expanded in a direction orthogonal to the shaft than a shaft portion provided coaxially subsequent to the shaft portion. The second member is integrally provided so as to extend from the other connected portion to both sides of the flange-shaped retaining portion and the supporting portions on both sides. A supporting plate, a groove extending from the edge of the supporting plate on the supporting portion side, the shaft portion is inserted, and the flange-shaped retaining portion is engaged with the supporting surface of the supporting plate; The passage portion formed continuously on one side of the support portion and through which the shaft portion of the first member passes through the first member in a positional relationship of passing through the groove portion, and the support surface of the support plate engaged with the passage portion. Of the surface of the retaining portion and the supporting surface of the supporting plate engaged with the retaining portion, at least A cushioning material that has a large surface friction coefficient provided on one surface and that absorbs shocks and vibrations that pass through the balance main body, the hanging portion, and the hanging tray when a load within the weighing range is applied to the hanging tray. And a connecting part in a hanging plate type balance.