JPS6252162B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to split disks, which are widely used in various industrial fields, such as wheels, pulleys, gears, etc., and is particularly suitable for assembling and disassembling them even in extremely narrow spaces. The present invention relates to an improved segmented disc that is capable of splitting, and specifically relates to a connection structure suitable for such a segmented disc.

(Prior art and its problems) Conventional split disks of this type include, for example,
A known method has a structure in which one flange and the other flange, which are provided symmetrically as a joining surface between two divided parts, are fastened and connected via a plurality of through bolts. is mainly applied to wheels, pulleys, gears, etc. That is, FIG. 1 and FIG.
The outline of the structure will be explained with reference to FIG. 2, which is an end view taken along line A-A in the figure. A V-belt groove 2 is carved, and the boss 3 and rim 1 are integrally connected by a disk 4.
A flange 5 is provided along the radial dividing line A-A, and a rim, a boss, a disk, and two flanges 5 each have a semicircular ring shape.
A plurality of these two divided pieces having substantially the same shape and size (eight pieces in the example) are formed.
are connected by bolts 6 and nuts 7 to form one complete disk. 8 is a key groove for connecting to an axle (not shown). By the way, the work of joining this disk requires space as shown by B and B' in order to tighten the bolts or nuts with a spanner, so please do not use a place that is too narrow to take up such space. The drawback is that it is difficult to disassemble and assemble the disc, and depending on the surrounding conditions, it may be impossible to do so;
There is an inconvenience. Further, in a disk having such a structure, the corresponding divided surfaces of each divided piece are brought into close contact with each other and firmly connected. Therefore, when manufacturing a disc, a one-piece product is first created by circular machining, and then it is cut into a desired number of pieces in the radial direction to obtain predetermined divided pieces. Due to the relationship, if you combine a set of divided pieces with multiple pieces,
Since their inner and outer diameters are reduced by the amount removed in the above-mentioned cutting, they do not become perfect circles. That is, if it is desired that both the inner and outer diameters be finished in a perfect circle, the inner and outer diameters must be finished after the dividing surfaces are processed and joined, which is a disadvantage, inconvenience, and drawback.

In various power transmission devices, if split pulleys, gears, etc. are inserted into the casing in a divided state and can be assembled and connected internally, the opening size of the casing can be made considerably smaller. The strength of the casing,
It is clear that this is advantageous in terms of maintaining rigidity and further improving airtightness. However, in such cases, there is usually a limit to the space within the casing for joining the split discs, so the discs are required to have a joining structure that allows the required work to be easily performed even in a narrow space.

By the way, in order to put this type of split disk into practical use, in addition to being easy and easy to assemble and disassemble, the connection between the split pieces must be strong, and this bonding force can be maintained stably. Naturally, it is required that the manufacturing process including the manufacturing process itself is easy.

(Objective of the present invention) The present invention has been made in consideration of the above-mentioned points, and is capable of solving these problems and fully satisfying various requirements and conditions. The main purpose is to provide a joint structure that can be easily assembled and disassembled even in confined spaces.

Another object of the present invention is to provide a joint structure in which a divided disc in which the respective divided pieces forming the disc are joined together is particularly strong and stable.

(Summary of the Present Invention) Therefore, the joint structure of the split disc according to the present invention is such that the split piece is separable along the split line.
The split disc formed into two discs includes a connecting piece, a locking piece, a connecting part, and a tightening part, and the locking piece is engaged with each connecting end of the divided piece. A recessed groove and a hole in which the connecting part engages, and a hole in which the tightening part is penetrated or screwed together are provided, and when the connecting piece is in a connected state with the corresponding divided piece, the connecting piece is inserted through the connecting part. The locking piece has a structure capable of exerting a binding force to attract each other, and the locking piece has a structure that is engraved on the connecting end of one divided piece and the connecting end of the other divided piece that are in a mutually connecting relationship. The connecting part has a structure that can be engaged in a notched groove in the shape of approximately half of the locking piece, and can restrain relative displacement of both connecting ends of the divided piece in the direction of the dividing line, and the connecting part Engage with holes for connecting parts drilled and machined in the connecting end of the split piece and the connecting piece, respectively,
The structure is such that the coupling force of the coupling piece can be transmitted to both of the coupling ends of the divided pieces, and each axis center line of the coupling part and the tightening part is oriented in a direction parallel to the axis center line of the disk, and the above-mentioned division A slight gap is formed between the end faces of the pieces along the opposing dividing lines, and the tightening part fixes the joining piece to at least one of the front and back surfaces of the disc. The structure is such that the connecting end can be restrained from relative displacement in the axial center line direction of the tightening component, and further, at least one of the connecting ends of the connecting piece, the locking piece, and the dividing piece First, an opening structure is provided to stably maintain the bonding force of the coupling piece by elastic deformation of the member, and further, an opening structure is provided at the coupling end of the divided piece for insertion of the coupling part. The part of the connecting part that engages at least one of the machined surface of the hole and the machined surface of the connecting part insertion hole drilled in the connecting piece is an eccentric circle, an oval or an ellipse, or a part of a circle. The connecting piece is formed into a notched cross-sectional shape, and by rotating the connecting part by a predetermined amount, a connecting force is generated in the connecting piece to draw the divided pieces together in a direction substantially perpendicular to the dividing line. Features.

(Configuration as an embodiment and its operation) The present invention will be specifically described below with reference to illustrated embodiments.

Figures 3 to 7 show a basic embodiment of the present invention, with Figure 3 being an overall front view and Figure 4 being a basic embodiment of the present invention.
The figure shows the dividing plane, that is, B in Fig. 3.
FIG. 5 is an end view of a cross section taken along line -B, and FIG. 5 is an enlarged arrow directional view of the joint portion, that is, a cross section taken along line CC in FIG. Reference numeral 10 denotes a rim in which an appropriate number of V-belt grooves 9 (four in the illustrated embodiment) are carved along the outer periphery of the rim. A set of two divided pieces having substantially the same shape and size is formed by integrally joining the disk 12, and the joined ends of these divided pieces have the joining piece 17 and the integrated structure. A concave groove (recess) 13 machined into a semicircular shape of approximately the same size for inserting and engaging the locking piece 16, an engagement hole 14 of the connecting part 18, and a bolt 19 constituting the tightening part are screwed together. Matching female screw hole 1
5 is provided. As described above, the locking piece 16, which is integrally formed with the connecting piece 17, engages in the two recesses 13 carved at opposing positions in the connecting end of the divided piece, and At this joint end, the movement of the divided pieces is restrained so that they do not relatively displace (in other words, do not shift) in the radial direction (line B-B in FIG. 3).

As will be described later, this connecting piece 17 has a structure that can exert a connecting force that acts on the corresponding holes 14 through two connecting parts 18 to draw the divided pieces together in a direction substantially perpendicular to the dividing line. In addition, the tightening part consisting of bolts 19 and washers 20 is tightened so that the bolts and washers contact and fix the connecting piece 17 to the disk 12 surface of the divided piece, and both divided pieces are tightened at the joint part by the bolts. 19 is restrained from relative displacement in the axial direction.

In the lower half of FIG. 3, the divided pieces are in the relative positions when they are in a connected state, but the connecting piece 17, the locking piece 1
6. The connecting part 18 and the tightening part have been removed. As shown in the figure, an appropriate gap D is provided between the two divided pieces at the divided portion. Due to the existence of this gap, all of the coupling force of the coupling piece 17 is transferred to the locking piece 16 with the cooperation of the connecting part 18.
This has the effect of maximizing the action of the locking piece. Furthermore, in order to ensure that both the inner and outer diameters are a perfect circle with the predetermined diameters in a predetermined bonded state, the most desirable thing is to first process the disc in one piece when manufacturing the divided pieces that form this disc. At the same time, at least the insertion hole 1 of the locking piece 16 which becomes the joint end of both the divided pieces.
After accurately performing the machining of step 3 and the machining of the engaging hole 14 of the connecting part 18, the method is to cut and divide it with a saw having a wall thickness of D. This results in the least number of processing steps. In the split disk according to the present invention, since it is a prerequisite that this gap D is provided, such a processing method can be performed without any trouble or inconvenience. The size of the gap D is desirably small considering the influence on the belt, for example, but it can be said that its size has almost no effect on the coupling effect between the divided pieces of the disk.

Figure 6 shows the connecting piece 1 taken along the line E-E in Figure 5.
Fig. 7 is a bottom (back) view as viewed from the arrows in Fig. 7, with the divided piece cut away and the connecting part 18, bolt 19, and washer 20 removed. The locking piece 16 protrudes from the back side of the coupling piece, and an engagement hole 21 of the connecting part 18 and an oblong hole 22 for inserting the bolt 19 are bored therein. These oblong holes 22 are intended to make it easier for the connecting piece 17 to deform in its elongated direction when a bonding force is applied, and the bonding force is caused by an external force acting on the disk or expansion and contraction due to temperature changes of the component parts. This has the effect of reducing fluctuations in the flow rate and suppressing these fluctuations to a minimum.

FIG. 7 is an enlarged perspective view showing details of the connecting part 18, in which reference numeral 23 denotes an engagement hole 2 provided in the connecting piece 17.
1, and 24 is a cylindrical portion that engages only with the hole 14 provided in the split piece, and 24 is a cylindrical portion that engages only with the hole 14 provided in the split piece, and the center line 2 of the cylindrical portion 23 is
4' is eccentric by e. Further, the cross section of the head 25 is made into a rectangular shape, for example, so that a predetermined spanner (not shown) can be applied thereto, and by rotating the head 25 using the spanner, the outer circumferential surface of the cylindrical portion 24 is turned into a divided piece. It acts on the inner circumferential surface of the hole 14 formed in the disk 12 to generate a bonding force. Note that FIG. 5 shows the cylindrical portion 24 of the connected component at the position where the effect of eccentricity e is maximum.
The figure shows a state in which the two act on the corresponding divided pieces to exert a bonding force in the direction in which the gap between the bonded end surfaces is minimized. In this way, according to the present invention, the wrench is applied in both directions toward the disc surface, and the movement of the spanner arm is in a plane parallel to the disc surface, so even if the disc surface is narrow Even when installing and assembling at intervals, this rotational work will not be hindered.

Here, the effects of the eccentric circle of the connecting part 18 will be explained with reference to FIGS. 8 to 10. In FIG. Assume that an eccentric cylindrical portion 24 is located at the center of 21 at a distance −e from the center, as shown by a solid line. Now, when this connecting part is rotated 180 degrees, this cylindrical part 24
moves to the position indicated by the dotted line. In this case, the center is at +e, and the amount of movement is 2e.
Initially, the inner circumferential surface of the connecting part engagement hole 14 provided in the divided piece (disc 12) was not in contact with the outer circumferential surface of the cylindrical portion 24, as shown by the solid line, but
As mentioned above, by rotating the connecting piece 18 through 180 degrees, the hole 14 is moved to the position shown in phantom. In addition, the value of the movement amount a in this case is 2e
smaller than

The connecting component 27 in FIG. 9 has a cross-sectional shape obtained by cutting off two parallel surfaces of a cylinder instead of the eccentric cylindrical portion 24 illustrated in FIG. 8, and this connecting component can be rotated 90 degrees. The connecting part engagement hole 14 of the divided piece is moved from the position of the solid line to the position of the dotted line in a direction substantially perpendicular to the dividing line B--B, as in the case shown in the eighth figure.

Furthermore, the connecting component 28 illustrated in FIG. 10 has an oval or oval cross-sectional shape instead of a cylinder cut off with two parallel planes as shown in FIG. For example,
It is clear that a rotation of 90 degrees from the solid line position to the dotted line position produces the same effect as in FIG. 9.

The structures shown in FIGS. 8 to 10 as the above-described embodiments all act to move the divided pieces, that is, to draw the divided pieces together in a direction substantially perpendicular to the dividing line, and in short, It functions to generate a bonding force in the connecting piece 17 with respect to the divided pieces making up the disc.

With reference to FIG. 5, the quantitative relationship of the generation of bonding force is shown as follows. That is, (i) When the locking piece and the connecting piece are integrated, the binding force of one = elasticity of the connecting member × {g-(b-d/2-e-f/2)} the binding force of the other = Elasticity of the connecting member Elasticity x {(g+c+g')- (a+a'-d/2-d'/2-e-e'-f/2-f'
/2)} However, here, the elasticity of the connecting member mainly refers to the elasticity of the connecting force acting part of the divided pieces and the connecting piece 17, but it also includes the bending deflection of the connecting part 18. Ru.

Note that this adjustment of the bonding force can be performed as follows, for example. That is,
Connected parts with different eccentricity e (for example,
(e=2mm, 2.2mm, 2.4mm, etc.) and use them selectively. Alternatively, a plurality of connecting parts each having a different diameter i as shown in FIG. 9 are prepared and used selectively. This selection of dimensions can be made very easily by temporarily assembling the disk in a wide area where workability is good.

If a suitable eccentricity e or diameter i is selected and placed in advance in this way, in a narrow space, the simple operation of rotating the relevant connecting part by a predetermined amount and tightening the tightening part is sufficient. .
Therefore, by using this method,
It is clear that since the tolerance range for errors in each component is expanded, their manufacture becomes easier.

Next, we will explain another embodiment in which the tightening part has a function as a connecting part so that it also serves as a connecting part, and connecting pieces are provided on both sides of the tightening part so as to sandwich the disk from the front and back. , in FIGS. 11 to 14 showing only the main part of the joint structure, FIG. 11 is a front view thereof, and FIG.
Figure 2 is a sectional view taken along the line F-F in Figure 11, and Figure 13
The figure is an end view of the dividing plane of the disk, that is, a cross section taken along line GG, and FIG. 14 is an exploded perspective view of the joint structure.

Connecting pieces 31 each having an oval opening 31a are provided on both the front and back sides of the divided pieces 29 and 30 constituting the disc so as to abut and adhere to each other. A special washer 32 is abutted on the opposite side.

In addition, 33 has one on each side of the divided pieces 29 and 30.
This is a tightening part that also functions as a connecting part arranged one by one, and consists of a specially shaped bolt 34 and a normal nut 35. These bolts 34
As in the connecting part 27 illustrated in FIG. 9, the cross-sectional shape is a circle with two notches, that is, more specifically, the plane parts 34a, which are substantially parallel to each other, are on both sides. When assembling the disk, these two bolts 34 are rotated, for example, by 90 degrees from the state shown in FIG.
2. After inserting into the predetermined engagement holes provided in the connecting piece 31 and the dividing pieces 29 and 30,
By rotating it 90 degrees to the state shown in the diagram,
A desired bonding force can be applied to the divided pieces 29 and 30 using the same principles and effects as described above with reference to FIG.

36, the divided pieces 29 and 30 are connected at the joint end,
There are two locking pieces for restraining relative displacement in the direction of the dividing line, but in this embodiment, the fourth
~ As seen in Figure 6, the locking piece 16 is connected to the connecting piece 1.
7, but are separate from both the connecting piece 31 and the special washer 32, and are engraved at appropriate locations on the connecting ends of these divided pieces, respectively.
It is engaged with a circular insertion hole consisting of semicircular grooves 29a and 30a of approximately the same size.

A groove 32a having an appropriate width is cut in one end of the special washer 32, and the nut 3 is inserted into the tip of the bolt 34 which is inserted and engaged as specified.
5 are screwed together and tightened, the notches provided on both sides of the bolt head 34b fit into the grooves, thereby preventing loosening of the coupling force due to undesirable rotation of the tightening part 33. It has a structure that can completely prevent it. In addition, by making the width such that the left and right sides of the center of the special washers 32, 32 are positioned with an appropriate small gap from both ends of the locking piece 36,
The locking piece is reliably prevented from falling off (see FIGS. 11 and 13).

As illustrated in FIG. 14, the locking piece 36 may be in the form of an open ring, if necessary, so that when the disk receives external force, it is elastically deformed to minimize fluctuations in the bonding force itself. It is also possible to make it possible to expect this effect. Furthermore, the disc (divided piece 2
9, 30) connecting pieces 31, 31 to be brought into contact with the front and back sides of
has an open structure with an elongated cross section (a structure with a large open space compared to a rectangular plate with only the necessary round holes), which allows for elastic deformation,
Semi-elliptical openings 2 are also provided in the dividing pieces 29 and 30, respectively.
By providing 9b and 30b, the hatched portions 29c and 30c shown in Fig. 14 function as fixed beams at both ends against the bonding force, allowing for elastic deformation, thereby stabilizing the bonding force. The structure is such that it can be obtained.

Reference numerals 38 and 39 in the figure indicate bolts and nuts constituting another tightening part 37 that is added and installed in addition to the two tightening parts 33 described above.

As still another embodiment, some embodiments of coupling structures suitable for cases where narrow work is required only when generating the coupling force of disks are described below.
This is schematically illustrated in FIGS. 5 to 17. That is, the first
Figure 5 shows the connection structure 37 used only in one place.
FIG. 16 shows a four-part disc using two flange connections 38 and two connection structures 37 according to the present invention, and FIG. 17 shows a connection structure 3 according to the present invention.
It is a six-part disc with the number 7 used in six places. In addition, two parts of the dividing plane in Fig. 17 are on the normal line,
The other four locations are dislocated parallel to the normal.

In addition, when conventionally known split discs are fitted to the axle of a wheel or pulley, in particular, canvas or elastic pads are often interposed between the disc and the shaft to prevent slippage and allow for manufacturing errors. However, even in the present invention, it is easy to insert and interpose the same type of pad between the shaft and the boss.

(Effects of the present invention) As is clear from the above description, according to the present invention, the following effects can be obtained.

(1) As is clear from the examples, the wrench work in the work of obtaining binding force by rotating the connecting parts and the work of tightening the tightening parts to fix the joint pieces to the disc is performed by using the spanner arm parallel to the disc. The space required for the stroke is small, so it is possible to assemble the disc in a narrow space.

(2) By making the connecting pieces and other parts elastically deformable, the bonding force can be stably maintained against external forces applied to the disk, temperature changes, etc., and a strong bond can be achieved.

(3) By making the cross-sectional shape of the part of the connecting part that engages at least one of the divided pieces or the joining piece into an eccentric circle, an oval, an ellipse, etc., the connecting part can be rotated between 90° and 180°. A desired bonding force can be applied to the disk by a simple and easy operation such as rotating it.

(4) Since the disk using the joint structure of the present invention is based on the premise that a gap exists between the end faces of the divided pieces along the opposing dividing lines, this gap should be selected to be approximately the thickness of the saw. For example, a one-piece disk is milled, holes are made for the engaging surfaces of the locking pieces and the connecting parts necessary for the joint structure, and then the disk is cut and divided as specified with a saw. There are several ways to do this. This significantly reduces the number of steps involved in manufacturing the disk, making it easier to manufacture.

(5) The parts that make up the joint structure are flat plates with holes drilled, bolt-like, or pin-like parts that can be easily manufactured as general-purpose mechanical parts, and their size also falls under the category of small parts. It can be something simple.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventionally known two-part V-belt pulley, FIG. 2 is an end view taken along line A-A in FIG. 1, and FIGS. 3 to 7 are basic views of the present invention. 3 is an overall front view of the embodiment, FIG. 4 is a cross-sectional end view taken along line B-B in FIG. 3, and FIG. 5 is a cross-sectional view taken along line C-C in FIG. 3. 6 is a bottom view of the connecting piece taken along the line E-E in FIG. 5, and FIG. 7 is an enlarged perspective view illustrating details of the connecting parts that are the main components of the present invention. , FIGS. 8 to 10 are schematic cross-sectional views of main parts for explaining the functions of different connecting parts according to the present invention, and FIGS. 11 to 1
4 shows the main parts of another embodiment, FIG. 11 is a front view thereof, FIG. 12 is a sectional view taken along the line FF in FIG. 11, and FIG. 13 is a sectional view taken along the line G-F in FIG. FIG. 14 is an exploded perspective view of the cross section taken along line G, and FIGS. 15 to 17 illustrate various split discs in which the coupling structure according to the present invention is applied at one to six locations. It is a schematic front view. 1: Rim, 2: V-belt groove, 3: Boss, 4: Disc, 5: Flange, 6: Bolt, 7: Nut, 9: V-belt groove, 10: Rim, 11: Boss,
12: Disc, 13: Semicircular groove, 14:
Engagement hole for connecting parts, 15: Female screw hole, 16: Locking piece, 17: Connecting piece, 18: Connecting part, 19: Bolt, 20: Washer, 21: Engagement hole for connecting part, 2
2: Oval hole for bolt insertion, 23, 24: Cylindrical part of connecting part 18, 27, 28: Connecting part, 29,
30: Divided piece, 29a, 30a: Semi-circular groove, 29b, 30b: Semi-elliptical opening, 31: Connecting piece, 32: Special washer, 32a: Groove, 33, 3
7: Tightening parts, 34: Specially shaped bolts, 35:
Nut, 36: Locking piece, 37: Connection structure, 38:
Bolt, 39: Nut, D, D': Gap, A-
A, B-B, G-G: Parting line, e: Eccentricity.

Claims (1)

[Scope of Claims] 1. A split disc formed into one disc by split pieces that can be separated along a dividing line is joined by a joining piece, a locking piece, a connecting part, and a tightening part. each connecting end of the divided piece is provided with a notched groove that engages with the locking piece, a hole that engages with the connecting component, and a hole through which the tightening component is penetrated or screwed together; The connecting piece is structured so that when it is in a connected state with the corresponding divided piece, it can exert a pulling force by rotating the connecting parts when assembling the disk, wherein the locking pieces are mutually connected. The connecting end of one divided piece and the connecting end of the other divided piece that are connected to each other are engaged in a recessed groove approximately half the shape of the locking piece, and The connecting parts have a structure capable of restraining relative displacement of both connecting ends of the divided pieces in the direction of the dividing line, and the connecting parts are provided with connections drilled and processed in the corresponding connecting ends of the divided pieces and the connecting pieces, respectively. The connecting piece has a structure that can be engaged with the component hole and transmit the connecting force of the connecting piece to both of the connecting ends of the divided pieces, and the axis center line of each of the connecting part and the tightening part is aligned with the axis center line of the disk. The tightening part is oriented in a direction parallel to the front and back sides of the disk, and a slight gap is formed between the end faces of the divided pieces along the opposing dividing lines. By fixing it to at least one side of the
A connecting structure for split disks, characterized in that the connecting end has a structure capable of restraining relative displacement in the direction of the axial center line of the tightening component. 2. The connection of split disks formed into one disk by split pieces that can be separated along the dividing line is composed of a coupling piece, a locking piece, a connecting part, and a tightening part, and the split pieces Each of the connecting ends is provided with a recessed groove that engages with the locking piece, a hole that engages with the connecting component, and a hole through which the tightening component is penetrated or screwed together; In a structure capable of exerting a pulling force by rotating the connecting parts when assembling the disc when the locking pieces are in a connected state with the divided pieces, the locking pieces are connected to each other while the locking pieces are connected to each other. The connecting end of the divided piece and the connecting end of the other divided piece are engaged in the recessed grooves of approximately half the shape of the locking piece, and both connecting ends of the divided piece are engaged with each other. has a structure capable of restraining relative displacement in the direction of the dividing line, and the connecting parts are engaged with connecting part holes drilled and machined in the connecting ends of the corresponding divided pieces and in the connecting pieces, respectively. and a structure capable of transmitting the coupling force of the coupling piece to both of the coupling ends of the divided pieces, and each axis center line of the coupling part and the tightening part is oriented in a direction parallel to the axis center line of the disk, A slight gap is formed between the end faces of the divided pieces along the opposing dividing lines, and the tightening part fixes the connecting piece to at least one of the front and back surfaces of the disc. By that,
The connecting end has a structure capable of restraining relative displacement in the direction of the axial center line of the tightening component, and at least one of the connecting ends of the connecting piece, the locking piece, and the dividing piece is provided with: A joint structure for split disks, characterized in that an opening structure is provided for stably maintaining the joint force of the joint pieces through elastic deformation of the member. 3. The connection of split discs formed into one disc by split pieces that can be separated along the dividing line is composed of a coupling piece, a locking piece, a connecting part, and a tightening part, and the split pieces Each of the connecting ends is provided with a recessed groove that engages with the locking piece, a hole that engages with the connecting component, and a hole through which the tightening component is penetrated or screwed together; In a structure that can exert a pulling force by rotating the connecting part when assembling the disc when it is connected to the divided pieces, the locking pieces are connected to each other while the locking pieces are connected to each other. The connecting end of the divided piece and the connecting end of the other divided piece are engaged in the recessed grooves of approximately half the shape of the locking piece, and both connecting ends of the divided piece are engaged with each other. has a structure capable of restraining relative displacement in the direction of the dividing line, and the connecting parts are engaged with connecting part holes drilled and machined in the connecting ends of the corresponding divided pieces and in the connecting pieces, respectively. and a structure capable of transmitting the coupling force of the coupling piece to both of the coupling ends of the divided pieces, and each axis center line of the coupling part and the tightening part is oriented in a direction parallel to the axis center line of the disc, A slight gap is formed between the end faces of the divided pieces along the opposing dividing lines, and the tightening part fixes the connecting piece to at least one of the front and back surfaces of the disc. By that,
The joint end has a structure capable of restraining relative displacement in the direction of the axial center line of the tightening part, and the machined surface of the connecting part insertion hole drilled in the joint end of the divided piece and the joint The portion of the connecting component that engages at least one of the machined surfaces of the connecting component insertion hole drilled in the piece is formed into an eccentric circle, an oval or an ellipse, or a cross-sectional shape with a part of a circle cut out. , a split disk characterized in that, by rotating the connecting parts by a predetermined amount, a connecting force is generated in the connecting pieces to draw the divided pieces together in a direction substantially perpendicular to the dividing line. bond structure. 4. The split disk according to any one of claims 1 to 3, characterized in that the tightening part has a function as the connecting part and has a structure that allows it to also serve as the connecting part. bond structure. 5. The joint structure for split disks according to any one of claims 1 to 4, characterized in that the locking piece is formed integrally with the joining piece. 6. The joint structure for split discs according to any one of claims 1 to 5, characterized in that the joining piece is provided only on one side of the disc. 7. The split disc joining structure according to any one of claims 1 to 5, wherein the joining pieces are provided on both sides of the disc so as to sandwich the disc.