JP2019113136A - Coupling guard and mechanical device - Google Patents

Abstract

To provide a coupling guard which enables easy attachment work and detachment work.SOLUTION: A coupling guard 1 includes: an upper guard 102 extending in an axial direction of a rotary shaft 7 and a drive shaft 5 and including leg parts 106; and coupling members 30 which can be coupled to the upper guard 102. Each coupling member 30 includes: a fixing part 31 which can be fixed to a fixing object 8; and an extension part 32 extending upward from the fixing part 31. The extension part 32 includes: an inclined projection 110 formed on an inner surface 32a of the extension part 32 and having an inclined surface 110a inclining to the oblique lower side from the extension part 32 toward the leg part 106; and a support projection 111 disposed below the inclined projection 110 and supporting the leg part 106. The leg part 106 has a coupling hole 112 to which the inclined projection 110 can be coupled.SELECTED DRAWING: Figure 14

Description

  The present invention relates to a coupling guard and a mechanical device.

  There is known a mechanical device which rotates a rotating shaft by connecting a rotating shaft of a rotating machine to a driving shaft of a motor via a coupling (shaft coupling) and rotating the driving shaft. Such a mechanical device is, for example, a pump device. The pump device includes a motor, which is a prime mover, and a pump, which is a rotary machine. The motor and the pump are disposed on a common base.

  The drive shaft of the motor is coupled to the rotational shaft of the pump via a coupling. In the pump device, the torque of the drive shaft of the motor is transmitted to the rotary shaft of the pump through the coupling, whereby the impeller fixed to the rotary shaft is rotated. A coupling guard is provided covering the coupling so that human fingers do not contact the high-speed rotating coupling, the exposed portion of the rotary shaft of the pump, and the exposed portion of the drive shaft of the motor.

  As a coupling guard, there is known a coupling guard having a structure for connecting a guard body formed of a combination of a guard body upper portion and a guard body lower portion to a connecting member fixed on a base.

JP, 2014-173680, A

  However, in the coupling guard having such a structure, the guard body is connected to the connecting member by a fastener such as a bolt or a screw. It takes time and effort.

  The problems described above can occur not only in the pump unit but also in all machines which connect the rotary shaft of the rotary machine to the drive shaft of the motor via a coupling.

Then, an object of this invention is to provide the coupling guard which can perform attachment operation and removal operation easily.
Furthermore, the present invention aims to provide a mechanical device provided with such a coupling guard.

  One aspect is a coupling guard for covering a coupling that connects a drive shaft of a prime mover and a rotation shaft of a rotary machine, wherein the coupling guard extends in the axial direction of the rotation shaft and the drive shaft. And an upper guard provided with legs, and a connecting member connectable to the upper guard, wherein the connecting member is a fixing portion fixable to an object to be fixed, and an extension portion extending upward from the fixing portion The extending portion is formed on the inner surface of the extending portion, and is disposed under the inclined protrusion, and an inclined protrusion having an inclined surface which inclines obliquely downward from the extending portion toward the leg portion. And a supporting projection for supporting the leg, wherein the leg has a connecting hole to which the inclined projection can be connected.

In a preferred aspect, the inclined projection includes a first inclined projection and a second inclined projection which extend in the vertical direction along the inner surface of the extension, and the support projection is formed of the first inclined projection. And a second support projection disposed between the first inclined projection and the second inclined projection, wherein the connection hole is formed of the first support projection and the second support projection. A first height adjustment hole having a size into which both the first inclined projection and the second inclination projection can be inserted, and a second height adjustment having a size into which the second support projection can be inserted And a hole.
In a preferred aspect, the leg portion includes a main body portion, a first cut portion and a second cut portion disposed along the extension direction of the main body portion and arranged adjacent to each other, the first cut portion, and the first cut portion. The device is characterized in that it is disposed between the second cut portion and an elastically deformable deformation portion outside and inside the main body portion, and the connection hole is formed in the deformation portion.

  Another aspect is a coupling guard for covering a coupling that connects a drive shaft of a prime mover and a rotary shaft of a rotary machine, wherein the coupling guard extends in the axial direction of the rotary shaft and the drive shaft. And an upper guard comprising legs, a lower guard locatable inside the upper guard, and the lower guard movable relative to the upper guard about the drive shaft and the rotation axis, The upper guard and the slide member connecting the lower guard, and a connecting member connectable to the upper guard, the upper guard has an arc-shaped inner surface, and has a curved shape of the upper guard And an upper side wall portion connected to an open end of the upper side curved portion, the lower guard having an arc shape along the inner surface of the upper side curved portion. Outside And the lower side wall connected to the open end of the lower side curved portion, and the slit is formed by the slide member in the upper side wall and the lower side wall. Alternatively, the connecting member has a movable length from a first position where a through hole through which the drive shaft can penetrate is formed to a second position where the upper curved portion and the lower curved portion overlap. And an extension part extending upward from the fixing part, wherein the extension part is formed on the inner surface of the extension part, and the extension part extends from the extension part to the leg The projection includes an inclined projection having an inclined surface inclined obliquely downward, and a support projection disposed below the inclined projection and supporting the leg, and the leg can be connected to the inclined projection. It is characterized by having a connecting hole.

  Yet another aspect is that it comprises a prime mover having a drive shaft, a rotary machine having a rotary shaft, the base as the fixed object to which the prime mover and the rotary machine are fixed, and the coupling guard. Machine equipment characterized by

  Each of the upper guard and the connection member has a connection structure that can be connected to each other. Therefore, since the worker can connect the upper guard and the connecting member without using the fastener, it is possible to shorten the time required for the attachment work and the removal work of the coupling guard.

It is a schematic diagram which shows a pump apparatus. It is a schematic diagram of the pump apparatus provided with the coupling guard which concerns on one Embodiment. It is a perspective view which shows the component of a coupling guard. It is a perspective view which shows the state which the coupling guard shown in FIG. 3 was assembled. FIG. 5 is a vertical cross-sectional view of the coupling guard shown in FIG. 4; It is a perpendicular sectional view showing the state where the lower guard was moved. It is a figure for demonstrating the removal operation of an upper guard and a lower guard. It is a figure for demonstrating the removal operation of an upper guard and a lower guard. It is a figure for demonstrating the removal operation of an upper guard and a lower guard. It is a figure which shows the opening angle of a slit. FIG. 7 shows another embodiment of a coupling guard. It is a perspective view which shows the component of the coupling guard which concerns on other embodiment. It is a perspective view which shows the state which the coupling guard shown in FIG. 12 was assembled. FIG. 7 shows yet another embodiment of a coupling guard. It is a side view of the coupling guard shown in FIG. It is a figure which shows the connection process to the connection member of an upper guard. It is a figure which shows other embodiment of the connection structure of an upper guard and a connection member. FIG. 7 shows yet another embodiment of a coupling guard. FIG. 7 shows yet another embodiment of a coupling guard.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding components are denoted by the same reference numerals, and redundant description will be omitted.

  FIG. 1 is a schematic view showing a pump device, and FIG. 2 is a schematic view of a pump device provided with a coupling guard 1 according to one embodiment. The pump device is a mechanical device provided with a motor 2 as a prime mover and a pump 3 as a rotary machine. The motor 2 and the pump 3 are fixed on a base 8 as a fixed object. The drive shaft 5 of the motor 2 extends from the motor casing 2 a of the motor 2 toward the pump 3, and the rotation shaft 7 of the pump 3 extends from the pump casing 3 a of the pump 3 toward the motor 2. The motor casing 2 a and the pump casing 3 a are fixed on the base 8. The drive shaft 5 of the motor 2 is coupled to the rotation shaft 7 of the pump 3 via a coupling (shaft coupling) 10. The torque of the drive shaft 5 of the motor 2 is transmitted to the rotary shaft 7 of the pump 3 via the coupling 10, and as a result, the impeller 4 fixed to the rotary shaft 7 rotates. In the present embodiment, the motor 2 and the pump 3 are arranged in series along the direction of the axis line CL of the drive shaft 5 and the rotation shaft 7.

  The coupling 10, the exposed portion of the drive shaft 5 of the motor 2, and the exposed portion of the rotary shaft 7 of the pump 3 are covered by the coupling guard 1. In the present embodiment, the coupling guard 1 is a closed coupling guard. The coupling guard 1 will be described below. FIG. 3 is a perspective view showing components of the coupling guard 1. FIG. 4 is a perspective view showing a state in which the coupling guard 1 shown in FIG. 3 is assembled. The coupling guard 1 includes an upper guard 20 and a lower guard 21 extending in the axial line CL direction of the rotary shaft 7 and the drive shaft 5, a connecting member 30 connectable to the upper guard 20, and the lower guard 21 the drive shaft 5 and the rotary shaft A slide member 22 connecting the upper guard 20 and the lower guard 21 is provided so as to be movable relative to the upper guard 20 centering on the point 7.

  The upper guard 20 includes a semi-cylindrical upper curved portion 25 having a curved shape, and upper side wall portions 27 and 28 connected to the open ends 25 b and 25 c of the upper curved portion 25. In order to distinguish the upper side wall portions 27 and 28, respectively, the upper side wall portion 27 is called a first upper side wall portion 27, and the upper side wall portion 28 is called a second upper side wall portion 28. The open end 25b of the upper curved portion 25 is a pump side open end, and the open end 25c of the upper curved portion 25 is a motor side open end. The upper curved portion 25 has an arc-shaped inner surface 25 a and has a slit 26 having a shape along the curved shape of the upper guard 20. Such an arc-shaped (curved) slit 26 has an arc shape in which a plane perpendicular to the axis line CL intersects the upper curved portion 25, and extends over the entire upper curved portion 25. In the present embodiment, the slits 26 extend along the shape of the inner surface 25 a of the upper curved portion 25.

  The upper guard 20 further includes leg portions 40 and 41 connected to lower ends of the upper curved portion 25 and extending downward from lower ends of the upper curved portion 25. In the present embodiment, the upper curved portion 25 and the legs 40 and 41 are integrally formed members whose vertical cross sections have an inverted U shape, but the upper curved portion 25 and the legs 40 and 41 are separate members It may be configured.

  Although a single connecting member 30 is depicted in FIGS. 3 and 4, the connecting member is also located on the opposite side of the connecting member 30 with respect to the axis CL. Each of the legs 40 and 41 is connected to each of the connecting members 30, and the connecting members 30 are fixed to the base 8 by fasteners 42 (see FIG. 3) for fixing the connecting member 30 to the base 8. . The connecting member 30 includes a fixing portion 31 that can be fixed to the base 8 and an extending portion 32 that extends upward from the fixing portion 31. The outer edge 30 a of the fixing portion 31 is formed with a notch 30 b into which the fixing tool 42 is inserted. The notch 30b extends inwardly from the outer edge 30a. The connecting member 30 is fixed to the base 8 by screwing the fixing tool 42 into the screw hole formed in the base 8 through the notch 30 b. The legs 40 and 41 are connected to the connecting member 30, and the upper guard 20 is fixed to the base 8 via the connecting member 30.

  Each of the upper side wall portions 27 and 28 has a plate shape having an inverted U-shape, and the upper side wall portions 27 and 28 have the same shape. The upper side wall 27 is disposed on the pump side of the upper guard 20, and the upper side wall 28 is disposed on the motor side of the upper guard 20. Each of the upper side wall portions 27 and 28 is connected to the upper side curved portion 25 and the leg portions 40 and 41, and is disposed perpendicularly to the axis line CL.

  The lower guard 21 has a semicircular shape connected to the lower curved portion 35 having an arc-shaped outer surface 35 a along the inner surface 25 a of the upper curved portion 25 and the open ends 35 b and 35 c of the lower curved portion 35. Lower side wall portions 36 and 37 are provided. The lower curved portion 35 has a semi-cylindrical shape (curved shape). The lower side wall 36 is called a first lower side wall 36 and the lower side wall 37 is called a second lower side wall 37 in order to distinguish the lower side walls 36 and 37 respectively. The open end 35b of the lower curved portion 35 is a pump side open end, and the open end 35c of the lower curved portion 35 is a motor side open end.

  As shown in FIG. 4, the size of the lower guard 21 is smaller than the size of the upper guard 20, and when the coupling guard 1 is assembled, the lower guard 21 is the inside of the upper guard 20, ie, the upper curved portion 25, It is disposed in a space surrounded by the legs 40 and 41 and the upper side walls 27 and 28. The upper side wall 27 is disposed adjacent to the pump casing 3 a of the pump 3, and the lower side wall 36 is disposed adjacent to the upper side wall 27. Although not shown, the upper side wall 28 is disposed adjacent to the motor casing 2 a of the motor 2, and the lower side wall 37 is disposed adjacent to the upper side wall 28.

  The upper side wall portion 27 and the lower side wall portion 36 form a through hole 50 through which the rotation shaft 7 or the drive shaft 5 can penetrate. In the present embodiment, the upper side wall 27 and the lower side wall 36 disposed on the pump side form a through hole 50, and the through hole 50 has a size that allows the rotation shaft 7 to pass therethrough. Similarly, a through hole 51 having the same size as the through hole 50 is formed by the upper side wall portion 28 and the lower side wall portion 37. In FIG. 4, the entire upper side wall portion 28 is not shown, and only the through hole 51 is illustrated.

  The upper side wall 27 includes an upper recess 27a having a semicircular shape that constitutes a part of the through hole 50, and a vertical opening 27b connected to the upper recess 27a and extending downward from the upper recess 27a. ing. The upper recess 27 a and the vertical opening 27 b constitute a notch 52. The notch 52 extends vertically upward from the lower end of the upper side wall 27 and has a size that allows the rotation shaft 7 to pass therethrough. That is, the width of the notch 52 is larger than the diameter of the rotating shaft 7. The lower side wall portion 36 includes a lower side recessed portion 36 a having a semicircular shape which constitutes the other portion of the through hole 50. Thus, the through hole 50 is formed by the upper recessed portion 27a located above the rotating shaft 7 when the coupling guard 1 is assembled, and the lower recessed portion 36a located below the rotating shaft 7 There is.

  The upper side wall portion 28 includes an upper recessed portion 28a having a semicircular shape which constitutes a part of the through hole 51, and a vertical opening 28b connected to the upper recessed portion 28a and extending downward from the upper recessed portion 28a. (See Figure 3). The upper recess 28 a and the vertical opening 28 b constitute a notch 53. The notch 53 vertically extends upward from the lower end of the upper side wall portion 28 and has a size that allows the drive shaft 5 to pass therethrough. That is, the width of the notch 53 is larger than the diameter of the drive shaft 5. The lower side wall portion 37 includes a lower side recessed portion 37 a having a semicircular shape which constitutes the other portion of the through hole 51. Thus, the through hole 51 is formed by the upper recessed portion 28a located above the drive shaft 5 when the coupling guard 1 is assembled, and the lower recessed portion 37a located below the drive shaft 5 There is.

  As shown in FIG. 3, the slide member 22 is composed of a bolt 55 and a nut 56, and an insertion hole 57 into which the bolt 55 is inserted is formed at the end of the lower curved portion 35. The slit 26 has a size (i.e., a width) in which the bolt 55 can be inserted. A nut 56 is fixed at a position corresponding to the insertion hole 57 of the inner surface 35 d of the lower curved portion 35. The inner surface 35 d of the lower curved portion 35 is a surface opposite to the outer surface 35 a of the lower curved portion 35.

  The method of assembling the coupling guard 1 is as follows. The worker arranges the lower guard 21 inside the upper guard 20, and the slit 26 formed in the upper curved portion 25 of the upper guard 20 and the insertion hole 57 formed in the lower curved portion 35 of the lower guard 21. Face each other. In this state, the operator inserts the bolt 55 into the nut 56 through the slit 26 and the insertion hole 57, and screws the bolt 55 onto the nut 56.

  The lower guard 21 centers the drive shaft 5 and the rotation shaft 7 by loosening the bolt 55 so that a slight gap is formed between the outer surface 35 a of the lower curved portion 35 and the inner surface 25 a of the upper curved portion 25. It is movable relative to the upper guard 20 as The operator moves the bolt 55 of the slide member 22 along the arcuate slit 26 while pinching the bolt 55. With the movement of the bolt 55, the lower guard 21 held by the slide member 22 also rotates the drive shaft 5 and the rotation. It moves along the extending direction of the slit 26 about the axis 7. After movement of the lower guard 21 is completed, the bolt 55 may be tightened.

  FIG. 5 is a vertical sectional view of the coupling guard 1 shown in FIG. FIG. 6 is a vertical cross-sectional view showing the lower guard 21 moved. From the first position where the slide member 22 is formed with the through hole 50 by the upper recessed portion 27a of the upper side wall 27 and the lower recessed portion 36a of the lower side wall 36, the upper curved portion 25 and the lower curved portion It has a movable length to a second position where 35 overlaps with each other. The first position is also expressed as a position where the through hole 51 is formed by the upper recess 28 a of the upper side wall 28 and the lower recess 37 a of the lower side wall 37.

  As shown in FIG. 5, when the slide member 22 is located at the first position, the lower guard 21 is located below the rotary shaft 7 and the drive shaft 5, and the upper recess 27 a of the upper side wall 27 and A through hole 50 is formed by the lower recess 36 a of the lower side wall 36. Since the annular gap between the outer peripheral surface of the rotary shaft 7 and the through hole 50 is extremely small, the human finger is prevented from passing through the gap and coming into contact with the coupling 10.

  The operation of the pump device is started after the slide member 22 is in the first position. Therefore, the lower guard 21 is disposed below the rotary shaft 7 and the drive shaft 5 during operation of the pump device. As a result, foreign matter such as wear powder generated in the coupling guard 1 is received by the lower guard 21. Furthermore, the worker can visually recognize the inside of the coupling guard 1 through the slit 22. Therefore, the worker can confirm the state of the pump device including the connection state of the rotary shaft 7 and the drive shaft 5, abnormal rotation of the rotary shaft 7 and / or the drive shaft 5, and oil leakage.

  When the coupling guard 1 is disposed on the base 8, the upper side wall portion 27 is extremely close to the pump casing 3a, and the size of the gap between the pump casing 3a and the upper side wall portion 27 is approximately 8 mm or less. Such an arrangement can prevent a human finger from passing through the gap. As a result, contact of the human finger with the rotation axis 7 is prevented. Similarly, when the coupling guard 1 is disposed on the base 8, the upper side wall portion 28 is extremely close to the motor casing 2a, and the size of the gap between the motor casing 2a and the upper side wall portion 28 is approximately 8 mm or less It is. Furthermore, when the slide member 22 is located at the first position, the space between the drive shaft 5 and the through hole 51 formed by the upper recess 28 a of the upper side wall 28 and the lower recess 37 a of the lower side wall 37. The gap between is very small. Thus, the contact of the human finger to the drive shaft 5 and the coupling 10 is prevented. The operator moves the slide member 22 to the second position after the operation of the pump device is stopped. Therefore, the worker does not contact the rotating shaft 7, the drive shaft 5, and / or the coupling 10 during rotation.

  As shown in FIG. 6, when the slide member 22 is located at the second position, the lower guard 21 is located above the rotary shaft 7 and the drive shaft 5, and below the rotary shaft 7 and the drive shaft 5. There is no member that inhibits the vertical movement of the upper guard 20 and the lower guard 21 as the guard body. That is, when the slide member 22 is positioned at the second position, the lower curved portion 35 of the lower guard 21 and the upper curved portion 25 of the upper guard 20 overlap with each other. There is no lower guard 21 in the. In FIG. 6, the entire upper curved portion 25 and the entire lower curved portion 35 overlap with each other. The operator can easily perform the mounting operation of the guard body and the removal operation of the guard body without bringing the lower guard 21 into contact with the rotary shaft 7 and the drive shaft 5. The worker can perform the mounting operation and the removal operation without removing the lower guard 21 from the upper guard 20 by a simple method of moving the slide member 22 to the second position. Therefore, the time required for the installation operation and the removal operation can be shortened.

  7 to 9 are diagrams for explaining the removal operation of the upper guard 20 and the lower guard 21. FIG. FIG. 7 shows Step 1 of the removal operation, FIG. 8 shows Step 2 of the removal operation, and FIG. 9 shows Step 3 of the removal operation. First, the worker moves the slide member 22 from the first position to the second position in the arrow direction of FIG. 7 (see FIGS. 7 and 8). Thereafter, as shown in FIG. 9, the upper guard 20 and the lower guard 21 are pulled up.

  The mounting operation of the upper guard 20 and the lower guard 21 is performed through steps reverse to the steps shown in FIGS. 7 to 9. First, the worker connects the upper guard 20 and the lower guard 21 by the slide member 22 and moves the slide member 22 to the second position. In this state, the upper guard 20 and the lower guard 21 are lowered to a predetermined position on the base 8. At this time, since the upper curved portion 25 and the lower curved portion 35 overlap, the upper guard 20 and the lower guard 21 do not contact the rotating shaft 7 and the drive shaft 5. Next, the worker connects the upper guard 20 to the connecting member 30 and moves the slide member 22 from the second position to the first position. Alternatively, the worker may connect the upper guard 20 to the connecting member 30 after moving the slide member 22 from the second position to the first position.

  FIG. 10 is a view showing the opening angle of the slit 26. As shown in FIG. In the embodiment shown in FIG. 10, the opening angle θ of the slit 26, that is, a line segment SL1 connecting the center of the rotation axis 7 and one end of the slit 26, and a line connecting the center of the rotation axis 7 and the other end of the slit 26 The angle θ with SL2 is 180 degrees. However, the opening angle of the slit 26 is not limited to 180 degrees. The opening angle of the slit 26 may be smaller than 180 degrees as long as the upper guard 20 and the lower guard 21 can be moved in the vertical direction without the lower guard 21 coming into contact with the rotary shaft 7 and the drive shaft 5.

  FIG. 11 is a view showing another embodiment of the coupling guard 1. In the present embodiment, the same or corresponding members as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof will not be repeated. The configuration of the present embodiment, which is not particularly described, is the same as that of the above-described embodiment, and thus the description thereof will be omitted. In FIG. 11, the slit 26 includes a first slit 26A and a second slit 26B adjacent to each other. Similarly, the slide member 22 also includes a first slide member 22A and a second slide member 22B adjacent to each other. In FIG. 11, the nuts of the slide members 22A and 22B are drawn respectively.

  As shown in FIG. 11, the coupling guard 1 may be provided with a plurality of (two in the present embodiment) slits 26A and 26B, and a plurality of (two in the present embodiment) slide members 22A and 22B. May be provided. In one embodiment, the coupling guard 1 may include three or more slits and three or more slide members. The number of slits and the number of slide members correspond. According to the present embodiment, the operator can move the lower guard 21 more stably by providing the plurality of slits and the plurality of slide members. The first slit 26A may be disposed adjacent to the upper side wall 27 and the second slit 26B may be disposed adjacent to the upper side wall 28.

  FIG. 12 is a perspective view showing components of a coupling guard 1 according to still another embodiment. FIG. 13 is a perspective view showing a state in which the coupling guard 1 shown in FIG. 12 is assembled. In the present embodiment, the same or corresponding members as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof will not be repeated. As shown in FIGS. 12 and 13, the upper side wall 27 is formed with a slit 60 having a shape along the curved shape of the upper guard 20. The slit 60 has the same function as the slit 26 described above. The slit 60 is disposed above the upper recess 27 a of the upper side wall 27. As in the above-described embodiment, the opening angle of the slit 60 may be 180 degrees also in this embodiment.

  The lower sidewall portion 36 of the lower guard 21 is formed with an insertion hole 62 into which the bolt 55 is inserted, and the slit 60 has a size in which the bolt 55 can be inserted. A nut 56 is fixed at a position corresponding to the insertion hole 62 of the inner surface 36 b of the lower side wall portion 36. In this embodiment, when assembling the coupling guard 1, the worker arranges the lower guard 21 inside the upper guard 20, and the slits 60 formed in the upper side wall 27 of the upper guard 20 and the lower guard 21. The insertion holes 62 formed in the lower side wall portion 36 are opposed to each other. In this state, the operator inserts the bolt 55 into the nut 56 through the slit 60 and the insertion hole 62, and screws the bolt 55 onto the nut 56.

  In the embodiment shown in FIGS. 12 and 13, the slits 60 are formed in the upper side wall 27. In one embodiment, the slits 60 may be formed in the upper sidewall 28. In another embodiment, the slit 60 may include a first slit formed in the upper side wall 27 and a second slit formed in the upper side wall 28. In this case, the number of slide members 22 corresponds to the number of slits. By providing the plurality of slits and the plurality of slide members, the worker can move the lower guard 21 more stably.

  FIG. 14 is a view showing still another embodiment of the coupling guard 1. FIG. 15 is a side view of the coupling guard 1 shown in FIG. The configuration of the present embodiment, which is not particularly described, is the same as that of the above-described embodiment, and thus the description thereof will be omitted. In the present embodiment, the coupling guard 1 includes an upper guard 102 extending in the axial direction of the rotary shaft 7 and the drive shaft 5, and a connecting member 30 connectable to the upper guard 102. In the present embodiment, the coupling guard 1 has a connecting structure capable of connecting the upper guard 102 and the connecting member 30 without using a fastener such as a bolt or a screw.

  A comparative example with the coupling guard 1 according to the present embodiment will be described. In the comparative example, the upper guard is connected to the connecting member by a fastener such as a bolt or a screw. However, in this case, a worker has to use a fastener in the attachment work and the removal work of the coupling guard, which is time-consuming. According to the present embodiment, the worker can connect the upper guard 102 and the connecting member 30 without using a fastener, so that the time required for the attachment work and the removal work of the coupling guard 1 can be shortened. Work, and work efficiency can be achieved. Hereinafter, the coupling guard 1 which concerns on this embodiment which can have such an effect is demonstrated.

  The upper guard 102 is connected to the upper curved portion 103 having a curved shape, the upper side walls 104 and 105 connected to the open ends 103 a and 103 b of the upper curved portion 103, and both lower ends of the upper curved portion 103. And a leg portion 106 extending downward from both lower ends of the portion 103. In FIGS. 14 and 15 a single leg 106 is depicted, but also on the opposite side of the leg 106 with respect to the axis CL.

  The upper curved portion 103 and the leg portion 106 are integrally formed members whose vertical cross sections have an inverted U shape, but may be separate members. The upper side wall portions 104 and 105 are members different from the upper curved portion 103 and the leg portion 106. Accordingly, the upper side wall portion 104 may be referred to as the upper side wall member 104, and the upper side wall portion 105 may be referred to as the upper side wall member 105.

  The upper side wall portions 104 and 105 have the same structure. The upper side wall portion 104 includes an adjacent wall 104a adjacent to the pump casing 3a and a peripheral wall 104b connected to the adjacent wall 104a. The peripheral wall 104 b extends in the direction of the axis line CL. The notch 52 is formed in the adjacent wall 104a. Similarly, the upper side wall portion 105 includes an adjacent wall 105a adjacent to the motor casing 2a and a peripheral wall 105b connected to the adjacent wall 105a. The peripheral wall 105 b extends in the direction of the axis line CL. The notch 53 is formed in the adjacent wall 105a. A portion of the upper side wall portion 104 and a portion of the upper side wall portion 105 are covered by the upper curved portion 103 and the leg portion 106, and these upper side wall portions 104 and 105 are covered by the upper curved portion 103 and the leg portion 106 In the state, it is movable in the direction of the axis line CL.

  The extension portion 32 of the connecting member 30 is disposed under the inclined projection 110 and the inclined projection 110 having the inclined surface 110 a inclined obliquely downward from the extension portion 32 toward the leg portion 106, and supports the leg portion 106. And a protrusion 111. The inclined protrusions 110 and the support protrusions 111 are formed on the inner surface 32 a of the extending portion 32 and extend in the direction of the axis line CL. In FIG. 14, the inclined protrusions 110 and the support protrusions 111 formed on the inner surface 32 a of the extension portion 32 are drawn by solid lines, but in fact, as shown in the arrow direction in FIG. It is fixed to the base 8 in a state in which the direction is rotated.

  The leg portion 106 has a connecting hole 112 to which the inclined projection 110 can be connected. The connecting hole 112 has a size in which the inclined projection 110 can be inserted, and extends in the direction of the axis line CL similarly to the inclined projection 110. That is, the connection hole 112 is a long hole extending in the axis line CL. The leg portion 106 includes a body portion 116 connected to the upper curved portion 103, and a first cut portion 117 and a second cut portion 118 which extend along the extension direction of the body portion 116 and are disposed adjacent to each other. Disposed between the first cut portion 117 and the second cut portion 118, the outer and inner portions of the main body portion 116 are provided with elastically deformable deformation portions 119. The connection hole 112 is formed in the deformation portion 119.

  Each of the cut portions 117 and 118 is a notch extending in the vertical direction from the lower end of the leg portion 106 toward the upper curved portion 103. Since a part of the deformation portion 119 is connected to the main body portion 116 and the cut portions 117 and 118 are disposed on both sides of the deformation portion 119, the deformation portion 119 can be deformed independently of the main body portion 116 is there.

  The process of connecting the upper guard 102 to the connecting member 30 will be described with reference to FIG. FIG. 16 is a view showing a connecting process of the upper guard 102 to the connecting member 30. As shown in FIG. As described above, each of the upper guard 102 and the connecting member 30 has a connecting structure that can be connected to each other. As shown in FIG. 16, the operator places the upper guard 102 at a predetermined position above the connecting member 30 (see step 1 in FIG. 16) and lowers the upper guard 102 (see step 2 in FIG. 16). . By this lowering, the leg portion 106 (more specifically, the deformation portion 119) of the upper guard 102 is positioned inside the extension portion 32 of the connecting member 30, and eventually contacts the inclined projection 110. The deformation portion 119 further descends while being deformed to the inside of the main body portion 116 along the inclined surface 110 a of the inclined protrusion 110, and the inclination protrusion 110 is inserted into the connection hole 112 formed in the deformation portion 119. The support projection 111 is disposed below the inclined projection 110. Therefore, when the inclined projection 110 is inserted into the connection hole 112, the deformation portion 119 is supported by the support projection 111 (see step 3 in FIG. 16). Thus, the upper guard 102 is connected to the connecting member 30.

  According to the present embodiment, the worker can easily perform the work of attaching and detaching the upper guard 102 without using a fastener such as a bolt or a screw. The work can be shortened and the work can be made more efficient. Furthermore, since the support projection 111 supports the deformation portion 119, the upper guard 102 does not move in the direction approaching the base 8 even if a downward force acts on the upper guard 102. As a result, the upper guard 102 does not contact the rotating body (i.e., the drive shaft 5, the rotation shaft 7 and the coupling 10).

  In FIG. 14, the support projection 111 is a projection extending in the horizontal direction toward the upper guard 102. However, as shown in FIG. 16, the support projection 111 may be provided with a stopper portion 111a extending upward from its tip. The deformed portion 119 is sandwiched between the inner surface 32 a of the extending portion 32 and the stopper portion 111 a, and the upper guard 102 is more stably supported by the support protrusion 111.

  In the embodiment described above, the upper guard 102 is connected to the connecting member 30 by the elastic deformation of the deformable portion 119. However, in one embodiment, the worker bends the extending portion 32 of the connecting member 30 outward. The upper guards 102 may be disposed between the connecting members 30 adjacent to each other in a closed state. In this embodiment, the legs 106 do not necessarily have to include the cut portions 117 and 118 and the deformation portions 119.

  FIG. 17 is a view showing another embodiment of the connection structure of the upper guard 102 and the connection member 30. As shown in FIG. As shown in FIG. 17, the inclined projection 110 includes a first inclined projection 120, a second inclined projection 121, and a third inclined projection 122 extending in the vertical direction along the inner surface 32 a of the extension 32. . The first inclined projection 120, the second inclined projection 121, and the third inclined projection 122 extend in the vertical direction along the inner surface 32a of the extension 32, and are arranged in this order. In the present embodiment, three inclined protrusions are provided, but the number of the inclined protrusions is not limited to this embodiment as long as a plurality of inclined protrusions are provided. At least two inclined protrusions may be provided.

  The support projection 111 is a first support projection 131 disposed below the first inclined projection 120, and a second support projection disposed between the first inclined projection 120 and the second inclined projection 121. 132 and a third support projection 133 disposed between the second inclined projection 121 and the third inclined projection 122. The first support protrusion 131, the second support protrusion 132, and the third support protrusion 133 extend in the vertical direction along the inner surface 32a of the extending portion 32, and are arranged in this order. As shown in FIG. 17, the plurality of inclined protrusions 120 to 122 and the plurality of support protrusions 131 to 133 are alternately arranged.

  In the embodiment shown in FIG. 17, each of the support protrusions 131 to 133 has the same structure as the support protrusion 111 shown in FIG. 16, but has the same structure as the support protrusion 111 shown in FIG. May be In the present embodiment, three support protrusions are provided, but the number of support protrusions is not limited to this embodiment as long as a plurality of support protrusions are provided. At least two support protrusions may be provided.

  The connection holes 112 have first height adjustment holes 142A, 142B, 142C having sizes that allow insertion of any of the first inclined protrusions 120, the second inclined protrusions 121, and the third inclined protrusions 122; The second height adjustment holes 143A and 143B have sizes that allow insertion of both the second support protrusion 132 and the third support protrusion 133. Each of the first height adjustment holes 142A to 142C is disposed at a position corresponding to each of the inclined protrusions 120 to 122, and the number of first height adjustment holes corresponds to the number of inclined protrusions. The second height adjustment holes 143A and 143B are arranged at positions corresponding to the support protrusions 132 and 133, respectively. In the embodiment shown in FIG. 17, the number of first height adjustment holes corresponds to the number of support protrusions except the lowest support protrusion. In one embodiment, the number of first height adjustment holes may correspond to the number of support protrusions. In this case, a height adjustment hole corresponding to the support protrusion 131 is formed in the deformation portion 119.

  The process of connecting the upper guard 102 to the connecting member 30 will be described with reference to FIG. As shown in FIG. 17, the operator places the upper guard 102 at a predetermined position above the connecting member 30 (see step 1 in FIG. 17) and lowers the upper guard 102 (see step 2 in FIG. 17). . At this time, the worker deforms the deformation portions 119 adjacent to each other in the direction in which they approach each other. As shown in step 2 of FIG. 17, forces act on the deformation portions 119 adjacent to each other in directions approaching each other until each of the deformation portions 119 is positioned inside the inclined protrusion 110 and the support protrusion 111. Deform. In this state, the worker further lowers the upper guard 102 so that the lower end of the deformation portion 119 is positioned between the first support projection 131 and the first inclined projection 120. Thereafter, when the operator releases the force acting on the deformation portion 119, the deformation portion 119 returns to the original state, and the upper guard 102 is connected to the connection member 30.

  More specifically, the lower end of the deformation portion 119 is supported by the first support projection 131, the first inclined projection 120 is inserted into the height adjustment hole 142A, and the second support projection 132 is the height adjustment hole 143A. , The second inclined projection 121 is inserted into the height adjustment hole 142B, the third support projection 133 is inserted into the height adjustment hole 143B, and the third inclined projection 122 is inserted into the height adjustment hole 142C. Be done.

  The inclined projection 110 is provided with a plurality of inclined projections, and the support projection 111 is provided with a plurality of support projections, so that the operator can support the leg portion 106 (more specifically, the deformation portion 119). The height of the upper guard 102 relative to the base 8 can be adjusted by selecting one of the support protrusions 131 to 133 as the support protrusion. That is, the worker can change the distance between the lower end of the deformation portion 119 and the base 8. For example, the distance between the lower end of the deformation portion 119 when the deformation portion 119 is supported by the second support projection 132 and the base 8 is the deformation portion when the deformation portion 119 is supported by the first support projection 131 The distance between the lower end of 119 and the base 8 is larger. The upper guard 102 is disposed at the first height position by supporting the deformation portion 119 on the first support protrusion 131. The upper guard 102 is disposed at a second height position higher than the first height position by supporting the deformation portion 119 on the second support protrusion 132. The upper guard 102 is disposed at a third height position higher than the second height position by supporting the deformation portion 119 on the third support protrusion 133. Thus, the worker can adjust the height of the upper guard 102.

  As a comparative example, when the specification of the mechanical device is changed, for example, when the size of the motor is changed, the height of the drive shaft of the motor, the height of the rotary shaft of the pump, and the coupling according to the size of the motor The height of the must be changed. As a result, coupling guards must be manufactured to meet such specifications. Also, if the shape of the base to which the pump and motor are fixed, in particular the height of the base, is changed, a coupling guard must be produced which corresponds to the shape of the changed base. According to the present embodiment, since the coupling guard 1 has the height adjustment structure, the operator adjusts the height of the upper guard 102 even if the specification of the mechanical device is changed. be able to. Therefore, it is not necessary to manufacture new coupling guards of different sizes, and a single coupling guard 1 can be used.

  The embodiments described above may be combined. FIGS. 18 and 19 show still another embodiment of the coupling guard 1. In FIGS. 18 and 19, the components according to the embodiment shown in FIG. 4 and the components according to the embodiment shown in FIG. 14 are combined. As shown in FIGS. 18 and 19, the coupling guard 1 may include a plurality of components according to the above-described embodiment. The combination of the components of the coupling guard 1 is not limited to the embodiment shown in FIG. 4 and the embodiment shown in FIG. The components of the coupling guard 1 according to the embodiment described above may be combined as far as possible.

  The embodiments described above are described for the purpose of enabling one skilled in the art to which the present invention belongs to to practice the present invention. Various modifications of the above-described embodiment can naturally be made by those skilled in the art, and the technical idea of the present invention can also be applied to other embodiments. Accordingly, the present invention is not limited to the described embodiments, but is to be construed in the broadest scope in accordance with the technical concept defined by the claims.

DESCRIPTION OF SYMBOLS 1 coupling guard 2 motor 2a motor casing 3 pump 3a pump casing 5 drive shaft 7 rotating shaft 8 base 10 coupling 20 upper guard 21 lower guard 22 slide member 22A first slide member 22B second slide member 25 upper curved portion 25a inner surface 25b, 25c Opening end 26 Slit 26A First slit 26B Second slit 27 Upper sidewall 27a Upper recess 27b Vertical aperture 28 Upper sidewall 28a Upper recess 28b Vertical aperture 30 Connection member 30a Outer edge 31 Fixing portion 32 Extension portion 35 Lower side curved portion 35a Outer surface 35b, 35c Opening end 35d Inner surface 36 Lower side wall portion 36a Lower side recessed portion 37 Lower side wall portion 40, 41 Leg portion 42 Fastener 50, 51 Through hole 52, 53 Notch 55 Bolt 56 Nut 57 Insertion hole 60 Slit 102 Upper ger 103 upper curved portion 104 upper side wall portion 104a adjacent wall 104b peripheral wall 105 upper side wall portion 106 leg portion 110 inclined projection 110a inclined surface 111 support projection 111a stopper portion 112 connecting hole 116 main body portion 117 first cut portion 118 second cut portion 119 deformation Part 120 first inclined projection 121 second inclined projection 122 third inclined projection 131 first support projection 132 second support projection 133 third support projection 142A, 142B, 142C first height adjustment part 143A, 143B, 143C second height adjustment unit

Claims (5)

A coupling guard for covering a coupling that connects a drive shaft of a motor and a rotary shaft of a rotary machine,
The coupling guard is
An upper guard which extends in the axial direction of the rotation shaft and the drive shaft and which comprises legs
And a connecting member connectable to the upper guard,
The connecting member is
A fixing part that can be fixed to a fixed object;
And an extending portion extending upward from the fixing portion,
The stretching section is
An inclined projection formed on the inner surface of the extension and having an inclined surface that inclines obliquely downward from the extension to the leg;
A support projection disposed below the inclined projection and supporting the leg;
The said leg part has the connection hole which can connect the said inclination process, The coupling guard characterized by the above-mentioned. The inclined projection has a first inclined projection and a second inclined projection which extend in the vertical direction along the inner surface of the extending portion,
The support protrusion is
A first support protrusion disposed below the first inclined protrusion;
And a second supporting projection disposed between the first inclined projection and the second inclined projection.
The connection hole is
A first height adjustment hole having a size into which both the first inclined projection and the second inclined projection can be inserted;
The coupling guard according to claim 1, further comprising: a second height adjustment hole having a size into which the second support projection can be inserted. The legs are
Body part,
A first cut portion and a second cut portion extending along the extending direction of the main body portion and arranged adjacent to each other;
It is disposed between the first cut portion and the second cut portion, and is provided with elastically deformable deformation portions on the outside and the inside of the main body portion,
The coupling guard according to claim 1, wherein the connection hole is formed in the deformed portion. A coupling guard for covering a coupling that connects a drive shaft of a motor and a rotary shaft of a rotary machine,
The coupling guard is
An upper guard which extends in the axial direction of the rotation shaft and the drive shaft and which comprises legs;
A lower guard positionable inside the upper guard;
A slide member connecting the upper guard and the lower guard such that the lower guard can move relative to the upper guard about the drive shaft and the rotation axis;
And a connecting member connectable to the upper guard,
The upper guard is
An upper curved portion having an arc-shaped inner surface and having a slit shaped according to the curved shape of the upper guard;
And an upper side wall portion connected to the open end of the upper side curved portion,
The lower guard is
A lower curve having an arc-shaped outer surface along the inner surface of the upper curve;
And a lower side wall portion connected to the open end of the lower side curved portion,
The upper curved portion and the lower curved portion from a first position where the slide member is formed with a through hole through which the rotation shaft or the drive shaft can be penetrated by the upper side wall portion and the lower side wall portion. Has a movable length to a second position where
The connecting member is
A fixing part that can be fixed to a fixed object;
And an extending portion extending upward from the fixing portion,
The stretching section is
An inclined projection formed on the inner surface of the extension and having an inclined surface that inclines obliquely downward from the extension to the leg;
A support projection disposed below the inclined projection and supporting the leg;
The said leg part has the connection hole which can connect the said inclination process, The coupling guard characterized by the above-mentioned. A motor having a drive shaft,
A rotating machine having a rotating shaft,
A base as the fixed object to which the motor and the rotary machine are fixed;
A mechanical device comprising the coupling guard according to any one of claims 1 to 4.

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