JPH0520910Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a noiseless transmission chain device for transmitting power.

[Conventional technology]

Chain devices are widely used as mechanical elements for transmitting power.

A typical chain device is composed of a sprocket wheel having teeth formed around the sprocket wheel at regular intervals, and an endless chain connected to a sprocket wheel that meshes with the sprocket wheel. An example of a conventional chain device is shown in FIGS. 5 and 6.

In these figures, the chain 22 is of a commonly used leaf type, and its elements include a chain plate 22a shaped like a dogleg, and a circular pivot portion 22 at one end.
It forms b. Adjacent elements are connected to each other by a pin 22c of a pivot portion 22b so as to be bendable to each other. The inner circumferential edge of the chain plate 22a is formed as an engaging surface 22d having a curvature, and the chain plate 22a travels by engaging with the sprocket wheel 21.

On the other hand, the sprocket wheel 21 is constructed by fixing two sprocket plates 21b at intervals around a boss 21a fixed to a rotating shaft. Blades 21c are formed on the outer periphery of the sprocket plate 21b in the shape of a spur gear at a constant pitch, and a pin 21d is fixed to each blade 21c as shown in FIG. Further, a collar 21 is arranged around the axis of this pin 21d.
e is arranged rotatably.

In such a combination of the chain 22 and sprocket wheel 21, the engaging surface 22d engages with the circumferential surface of the collar 21e. That is, when the sprocket wheel 21 rotates, the chain 22 runs in a direction in which the engaging surface 22d is gradually wound up while contacting the circumferential surface of the collar 21e. Therefore, the engagement surface 22d and the collar 21e
The operation is similar to that of a roller chain, and the degree of wear between the two is reduced.

[Problem that the invention attempts to solve]

However, in this conventional leaf type chain, as shown in FIG. 4, the driving center ₀₁ of the sprocket 21 and the center ₀₂ of the connecting part of the chain 22 are aligned at the same right angle with respect to the chain tension direction. Since they are not on the line, when the chain 22 engages with the pin of the sprocket 21 and rotates, the connecting holes of the engaging link plates of one link plate 22 ₁ and the other link plate 22 ₂ are aligned as shown by the broken line in FIG. It moves up and down with the amount of displacement e, and the following chain row also moves up and down accordingly. When the chain moves up and down, the conveyed object moves up and down, which has an adverse effect on the conveyed object. In particular, when this chain is used to transport shellfish, etc. in a shellfish cleaning device, this vertical movement causes variations in the cleaning effect, and the vibrations have a negative impact on the shellfish ecosystem. . Furthermore, in the above-mentioned chain device, the link plate connecting hole and the connecting pin are subject to severe wear due to the vertical movement of the chain.
This will shorten the parts replacement cycle.

Therefore, an object of the present invention is to eliminate the vertical movement of the conveyed object due to the vertical movement of the chain connecting portion, and to eliminate noise and wear caused by vibration.

[Means for solving problems]

In order to achieve the above object, the transmission chain device of the present invention includes a driving sprocket wheel and a leaf-type endless chain that engages with the sprocket wheel and runs. The connecting hole that fits the connecting pin of each link plate constituting the endless chain is defined by the length [p/2 {1/cos (90°) derived from the pitch p of the link plate and the number of sprocket teeth z. /z)
−1}+connecting pin diameter] and the inclination angle [180°/
It is characterized by being formed as a long hole with a

Wear of the connection can be further reduced by rotatably providing a collar around the connection pin of the sprocket wheel that engages the connection hole of the chain.

[Effect]

The structure of the connecting hole that fits into the connecting pin of the link plate of the chain according to the present invention is introduced by the following equation.

That is, in the general leaf-type link plate shown in FIG. 3, the sprocket diameter D,
The displacement amount e is expressed as follows. However, z=number of sprocket teeth, p=chain link plate pitch, e=displacement amount of the center position of the link plate connection hole, and c=clearance for absorbing the displacement amount.

(1) Calculation of sprocket diameter D D = 2・aO tan (θ/2) = ad / aO aO = ad / tan (θ/2) ad = 1/2・p ∴D=2・aO = 2・ad /tan(θ/2) =2・(1/2・p)/tan(θ/2) =p/tan(θ/2) θ=360/z ∴D=p/tan(180°/z ) (2) Calculation of displacement e e= ag ag = dO − aO aO = D/2=D/{2×tan(180°/z)} cos(θ/2)= aO / dO ∴ dO = aO /cos (θ/2) = aO /cos (180°/z) ∴e= ag = dO − aO = aO /cos (180°/z) − aO = aO (1/cos (180°/z) − 1 = D/2・tan(180°/z)・{1/cos
(180°/z)-1} D=p/tan(180°/z) ∴e=p/2・tan(180°/z) ²・{1/cos
(180°/z)−1} From the above values, the shape of the connecting hole of the present invention is calculated as follows.

(3) Calculation of clearance amount c In Figure 3, the clearance amount is determined by ab<bg.
Assume that the diameter is increased so that ab=bg.

ab = p/2 cos (θ/4) = ab / bg ∴ bg = ab / cos (θ/4) c = bg − ab = ab / cos (θ/4) − ab = ab (1/cos (θ /4)-1) Here, since ab = p/2, c=p/2・{1/cos(θ/4)−1} =p/2・{1/cos(90°/z )−1}.

Therefore, as shown in Fig. 2, the long axis of the link plate connecting hole is the connecting pin diameter plus c, and the elliptical long hole 11e is formed by taking into account the amount of displacement.
This will prevent waving. At this time, by giving an inclination of 180°/z in the direction of the long axis of the elongated hole 11e, there is no play in the tension direction of the chain.

〔Example〕

Hereinafter, the features of the present invention will be specifically explained with reference to embodiments shown in the drawings.

FIG. 7 is a front view of a shellfish cleaning device showing an example in which the transmission chain device of the present invention is applied to conveying shellfish in the shellfish cleaning device, FIG. 8 is a side view, and FIG. 9 is a perspective view.

This shellfish cleaning device consists of a box-shaped base 1 with an open top end, a front plate 2, a back plate 3, and left and right side plates 4, and a column 5 stands up from the back. A roof 6 is connected to the column 5 so as to cover the upper part of the base 1, and an inspection door 7 and an inspection shutter 8 are attached to the front and left and right sides of the column 5 so as to be able to open and close in the vertical direction. In this way, base 1,
The column 5, roof 6, etc. form the main body of the cleaning device. A curtain 8a with slits made of rubber or the like is attached to the lower end of the inspection shutter 8 so as to be in contact with the pass line of the shellfish. Further, the front plate 2 is also provided with an inspection window 2a for maintenance and inspection.

A hydraulic motor 9 is installed on the column 5, and drives a pair of nozzle rods 10 disposed within the base 1 and below the roof 6. Furthermore, a hydraulic motor placed inside the device drives a chain 11 (FIG. 10) that transports baskets filled with shellfish.

The nozzle rod 10 has its rotating shaft 10a supported by a hydraulically driven bearing 10b, and is rotated by the operation of a hydraulic motor 9 via a timing belt 12. Nozzle heads 10c are provided at both left and right ends of the nozzle rod 10 to spray cleaning water toward the pass line. Further, the transmission system is configured such that the upper and lower nozzle heads 10c rotate while maintaining a positional relationship in which they face each other. In addition to such rotation of the nozzle head 10c, the upper and lower nozzle heads 10c are rotated synchronously,
A structure may also be used in which cleaning water is simultaneously jetted from both upper and lower surfaces of the shellfish in the basket. Also,
In addition to one nozzle rod 10, there are also Y-shaped,
The base may have a plurality of branches, such as an X-shape, or a disk-like base, and the nozzle head 10c may also be positioned asymmetrically with respect to the center of rotation instead of at regular intervals.

Furthermore, the bearing 10b that supports the rotating shaft 10a is
For example, a swivel joint or the like is used to connect a hose (not shown) for supplying washing water. The rotary shaft 10a and the nozzle rod 10 are each formed with a flow path for cleaning water, and have a structure that allows cleaning water to be jetted from the nozzle head 10c at the tip. Further, as shown in FIG. 10, a drain is provided inside the apparatus for discharging washing water.

Note that the roof 6 and the base 1a of the base 1, on which the bearing 10b is provided, are formed with mounting seats 6a and 1b that bulge toward the nozzle rod 10, respectively (the first
(See figure 0). The mounting seats 6a, 1b are processed by press-forming metal panels, and deformation when supporting the heavy bearing 10b is smaller than in the case of a flat plate. Further, torsional deformation caused by torque when the nozzle rod 10 starts rotating can be similarly eliminated, and a highly rigid housing structure can be obtained. Further, since the shape is concave in the direction of the pass line by the chain 11, the height of the entire device is short, and the capacity can be reduced.

As shown in FIGS. 13 and 14, the chains 11 are arranged to run in the left-right direction on the base 1, and in this example, they are arranged in four chains. The rotating shaft 13 is mounted on the left and right sides of the base 1 with bearings 13a.
One rotary shaft 13 is connected to the hydraulic oil supply/discharge system of the hydraulic motor 9a to drive the hydraulic motor 9a. In addition, a chain 11 is attached to the rotating shaft 13.
Attach the sprocket wheel 14 that winds the sprocket wheel.

The positional relationship between the pass line of the chain 11 and the upper and lower nozzle rods 10 is as shown in FIG. 10, and the lower nozzle rod 10 is included in the reciprocating pass line of the chain 11. In addition, the hydraulic motors 9, 9a of the nozzle rod 10 and the chain 11
This operation is performed independently by a pair of hydraulic valves (not shown) provided on the upper surface of the roof 6.

Furthermore, a transport table 16 is provided on the upper surface of the base 1.
is mounted so that it can tilt. This conveyance table 16 has four slits 16a in the pass line direction so that the chain 11 protrudes from the upper surface and can be carried by hooking a basket, and the conveyance start end portion is connected to a pivot point such as a pin or a collar. It is pivoted so that it can rotate vertically. This pivot structure allows one end of the transfer table 16 to be lifted upward, as shown in FIG. FIG. 14 shows the transport table 16
FIG. 2 is a perspective view of the inside of the base 1 when it is lifted up. Due to this tilted posture of the conveyance table 16,
Internal chain 11 and sprocket wheel 14
etc. are exposed, making cleaning and parts replacement of these members easier. Incidentally, in order to spray cleaning water from the lower nozzle head 10c to the pass line, an opening (not shown) is provided in the transport table 16 in accordance with the rotation range of the nozzle head 10c.

Further, on the conveyance table 16, a pressing device 17 for applying a compressing force to the shellfish is arranged.
This holding device 17 has the function of restraining the transported shellfish and net basket so that they do not shift vertically and horizontally, and also has the purpose of stimulating the shells to close them before entering the cleaning process. There is.
By closing the shell in this way, even if high-pressure cleaning water is sprayed from the nozzle head 10c,
This prevents them from entering the shell, preventing damage to the shell.

The holding device 17 is pivotally connected to a bracket 18 which is swingably connected to the roof 6 at one end thereof. That is, the bracket 18 has a structure in which a supporting rod 17a arranged in the depth direction is pivotally attached, and a plurality of presser rods 17c having a relatively small diameter are arranged between the support rod 17a and the auxiliary rod 17b on the downstream side of the pass line.

FIG. 11 is a partial front view of the chain 11 and sprocket wheel 14, and FIG. 12 is a sectional view taken along the - line arrow in FIG.

The chain 11 has the structure of the present invention shown in FIG. 1, and its elements include a chain plate 11a shaped like a dogleg, and a circular pivot portion 11b is formed at one end of the chain plate 11a. ing. Adjacent elements are connected to each other by a pin 11c of the pivot portion 11b so as to be bendable to each other. Adjacent chain plates are connected to each other by elongated holes 11e. Moreover, the inner peripheral edge of the chain plate 11a is
It is formed as an engaging surface 11d with curvature, and travels when this portion engages with the sprocket wheel 14.

On the other hand, the sprocket wheel 14
Two sprocket plates 14b are fixed at intervals around a boss 14a fixed to the sprocket plate 3. Then, on the outer periphery of the sprocket plate 14b, blades 14c are formed in the shape of a spur gear at a constant pitch, and each blade 14
A pin 14d is fixed to c as shown in FIG. Furthermore, a collar 14e is disposed on the pin 14d so as to be rotatable around the axis of the pin 14d.

In such a combination of the chain 11 and the sprocket wheel 14, the engaging surface 11d engages with the circumferential surface of the collar 14e. That is, when the sprocket wheel 14 rotates, the chain 11 runs in a direction in which the engaging surface 11d is gradually wound up while contacting the circumferential surface of the collar 14e. Therefore, the engagement surface 11d and the collar 14e
The operation is similar to that of a roller chain, and the degree of wear between the two is reduced.

Furthermore, if the chain 11 is combined to fit into the sprocket plate 14b spaced apart as shown in FIG. 12, the width of the chain 11 will be smaller than that of the conventional chain while still having the function of a roller chain. Become. Therefore, the degree to which the cleaning water from the lower nozzle head 10c becomes a hindrance when being injected in the direction of the pass line is also reduced.
As a result, the force of the washing water reaching the surface of the shellfish is not attenuated, allowing efficient washing.

In the above configuration, when performing cleaning work,
First, close the inspection door 7 and the left and right inspection shutters 8,
Prevents washing water from splashing outside. Next, the hydraulic motors 9 and 9a are operated to drive the sprocket wheel 14.
At the same time, the nozzle rod 10 to which cleaning water is supplied is rotated, and the transport table 16 is rotated.
Spray cleaning water onto the net basket on top.

The net basket is inserted into the slit 16a of the transport table 16.
The chain plate 11a protrudes upward from the chain plate 11a, and is conveyed as the chain 11 moves. At this time, by providing the collar 14e as described above, the chain 11 and the sprocket wheel 1
4, the wear and tear of the parts is reduced and smooth operation is ensured. Furthermore, by reducing the width of the chain 11, the obstruction to the washing water from the lower nozzle head 10c is reduced, allowing work to be carried out without reducing the washing ability.

[Effect of idea]

As explained above, in the power transmission chain device of the present invention, the connection holes that fit the connection pins of each link plate constituting the leaf-type endless chain are determined based on the vertical displacement of the sprocket wheel and the sprocket. It is formed to be an elongated hole with a length and an inclination angle derived from the pitch and number of teeth. Therefore, when the pin of the sprocket wheel and the link plate engage, the connecting pin of the following link plate moves below the elongated hole, and the link plate does not rise. Since the link plates that are not engaged with the sprocket foil are connected above the elongated hole, no play occurs in the connection direction. In this way, according to the present invention, it is possible to eliminate the vertical movement of the link plate, that is, the vertical movement of the conveyed object, and it is possible to significantly reduce wear on the connecting hole of the link plate and the connecting pin.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the configuration of the present invention, Fig. 2 is a perspective view showing an embodiment of the chain plate of the invention, and Fig. 3 is a schematic diagram for calculating the vertical movement of the link plate according to the conventional structure. , FIG. 4 is a schematic diagram showing the structure of a conventional link plate, FIGS. 5 and 6 are a sectional view and a perspective view of a conventional chain device,
Fig. 7 is a front view of a cleaning device showing an embodiment of the present invention, Fig. 8 is a side view, Fig. 9 is a perspective view, and Fig. 10 is a schematic diagram showing the arrangement of a conveying chain and a cleaning nozzle. A front view, Fig. 11 is a partial front view of the chain and sprocket wheel, Fig. 12 is a sectional view taken along the - line arrow in Fig. 11, Fig. 13 is a view when the inspection window is opened, and Fig. 14 is a transport table. FIG. 2 is a perspective view showing the inside of the device when one end of the device is lifted. 1...Base, 2...Front plate, 2a...Inspection window,
3... Back plate, 4... Side plate, 5... Column, 6...
Roof, 7...Inspection door, 8...Inspection shutter, 8
a... Curtain, 9... Hydraulic motor, 10... Nozzle rod, 10a... Rotating shaft, 10b... Bearing, 10c... Nozzle head, 11... Chain, 11a... Chain plate, 11b... Pivot part, 11c...pin, 11d...engaging surface, 11
e...Elongated hole, 12...Timing belt, 13...
...Rotating shaft, 13a... Bearing, 14... Sprocket wheel, 14a... Boss, 14b... Sprocket plate, 14c... Blade, 14d...
...Pin, 14e...Collar, 16...Transportation table, 17...Press device.

Claims (1)

[Claims for Utility Model Registration] 1. In a transmission chain device equipped with a driving sprocket wheel and a leaf-type endless chain that travels in engagement with the drive sprocket wheel, each link constituting the leaf-type endless chain The length of the connecting hole that fits into the connecting pin of the plate is determined from the pitch p of the link plate and the number of sprocket teeth z [p/2・{1/cos (90°/z)
−1}+connecting pin diameter] and an elongated hole having an inclination angle of [180°/z] with respect to a line perpendicular to a line connecting the centers of the connecting holes on both sides. Transmission chain device. 2. The power transmission chain device according to claim 1, characterized in that a collar is rotatably provided around a connecting pin of a sprocket wheel that engages with a connecting hole of the chain.