WO2020213409A1

WO2020213409A1 - Push-type opening and closing device

Info

Publication number: WO2020213409A1
Application number: PCT/JP2020/015137
Authority: WO
Inventors: 純菅佐原; 厚菊地
Original assignee: スガツネ工業株式会社
Priority date: 2019-04-15
Filing date: 2020-04-02
Publication date: 2020-10-22
Also published as: JP7410046B2; JPWO2020213409A1

Abstract

Provided is a push-type opening and closing device 2 that can exhibit sufficient buffering functionality with respect to the rotation of a cover in the closing direction. The push-type opening and closing device 2 comprises: a support frame 10 that defines an input opening 12; a cover 20 that opens and closes the input opening 12, and the top end of which is supported on the support frame 10 so as to be able to rotate around the horizontal axis of rotation; a weight 30 that is fixed to the back side of the cover 20 and that applies a rotational moment to the cover 20 in the closing direction; and a damper mechanism 40 that suppresses rotation of the cover 20 in the closing direction. The damper mechanism 40 has first and second cam members 41, 42 and a linear damper 43 that are disposed on the axis of rotation L. The first cam member 41 is fixed to the support frame 10 so as to be unable to rotate relative to each other and unable to move in the axial direction, and the second cam member 42 is supported by the cover 20 so as to be unable to rotate relative to each other. The second cam member 42 moves in the axial direction with the rotation of the cover 20. The linear damper 43 suppresses movement of the second cam member 42 in the axial direction due to rotation of the cover 20 in the closing direction.

Description

Push-in type switchgear

The present invention relates to a switchgear configured to open a slot by pushing a lid.

As shown in Patent Document 1 (Patent 4885257), a push-type switchgear is often used for the trash can. This switchgear has a support frame, a lid and a weight. The support frame is attached to the main body of the trash can to define the slot. The upper end of the lid is rotatably supported by the support frame around a rotation axis horizontal to the support frame, and the inlet is opened and closed. The weight is fixed to the back side of the lid and gives the lid a rotational moment in the closing direction. When the lid is pushed against the rotational moment of the weight, the slot is opened.

After pushing in the lid, inserting your hand into the slot and throwing in dust, when you release your hand from the lid, the lid closes vigorously due to the rotational moment of the weight, and the lid hits the support frame and makes a loud noise. Therefore, in Patent Document 1, a rotary damper is attached to a shaft member that rotatably supports the lid, and the momentum of the closing operation of the lid is relaxed.

As the trash can becomes larger, the push-type switchgear also becomes larger. In that case, the rotational moment in the closing direction of the lid also increases, but the rotational damper disclosed in Patent Document 1 cannot exert a sufficient buffering function against a large rotational moment.

The present invention has been made to solve the above-mentioned problems, and has a support frame defining an input port and a support frame.
A lid whose end is rotatably supported by the support frame around the rotation axis to open and close the input port, an urging member that imparts a rotational moment in the closing direction to the lid, and rotation of the lid in the closing direction. In a push-in type switchgear equipped with a damper mechanism that suppresses
The damper mechanism has first and second cam members and linear dampers arranged on the rotation axis, and the first and second cam members have cam surfaces in contact with each other, respectively, and the first cam member is in contact with each other. The cam member is non-rotatably supported by the support frame, the second cam member is non-rotatably supported by the lid, and one of the first and second cam members cams as the lid rotates. The member moves in the axial direction, and the linear damper suppresses the axial movement of one of the cam members due to the rotation of the lid in the closing direction.

According to the above configuration, the rotation in the closing direction of the lid is converted into an axial force by the first and second cam members, and the axial force is received by the linear damper, so that the rotational moment in the closing direction of the lid is large. Even in such a case, a sufficient buffer function can be exhibited.

Preferably, the first cam member is fixed to the support frame so as not to be movable in the axial direction, and the second cam member is moved in the axial direction with the rotation of the lid. The holder has a holder fixed to the back side of the lid, the holder has a housing cylinder portion arranged on the rotation axis, and the end closer to the first cam member is an open end. The second cam member and the linear damper are housed in the accommodating cylinder portion, the linear damper is arranged on the back side of the accommodating cylinder portion, the second cam member is arranged on the opening end side, and the accommodating cylinder is arranged. Axial slideable and non-rotatable with respect to the part.
According to the above configuration, since the linear damper is arranged on the lid, a sufficient stroke can be secured without being greatly restricted. Further, since the linear damper is housed in the holder and the second cam member is housed so as to be slidable in the axial direction, a stable cushioning function can be exhibited. Further, by combining the second cam member housed in the holder with the first cam member fixed to the support frame, the assembly work of the damper mechanism can be efficiently performed.

Preferably, the holder has a mounting plate portion that is integrated with the housing cylinder portion, a plurality of slits extending in parallel with the rotation axis are formed in the mounting plate portion, and the back side of the lid has the mounting plate portion. A plurality of screw rods protruding from the lid are fixed, and the screw rod is inserted into a portion far from the first cam member in the slit, and by tightening a nut screwed into the screw rod, the holder Is fixed to the back side of the lid.
According to the above configuration, the second cam member can be aligned with the first cam member by moving the holder in parallel with the rotation axis while the screw rod is inserted into the slit of the holder, and then the nut. As a result, the holder can be fixed to the lid, so that the assembly work of the damper mechanism can be performed more efficiently.

Preferably, the plurality of slits include a first slit formed in a portion of the mounting plate portion of the holder far from the first cam member and a second slit formed in a portion close to the first cam member. Including, the end of the second slit near the first cam member is open at the side edge of the mounting plate portion.
According to the above configuration, since the end of the second slit is open, the screw rod is placed right next to the second slit away from the holder at the initial position before moving the holder toward the first cam member. be able to. Therefore, the fixing points of the screw rods and nuts in the first and second slits can be sufficiently separated in the direction of the rotation axis, and the fixing strength of the holder to the lid can be increased.

Preferably, the holder has a pair of side plate portions that are orthogonal to the mounting plate portion and are connected to both side edges thereof and are connected to both ends of the storage cylinder portion, and the first cam member of the pair of side plate portions. A passing hole is formed in the closer side plate portion, which is connected to the open end of the second slit and allows the screw rod to pass through.
According to the above configuration, the strength of the holder can be increased by the pair of side plates. Since a passing hole is formed in one side plate portion, a screw rod located at a position away from the holder can enter the second slit through the passing hole. Therefore, in the assembly process of the damper mechanism, the one side plate portion does not hinder the movement of the holder in the rotation axis direction.

Preferably, the support frame has a pair of support plates protruding from both side edges to the back side, and the lid has a pair of arms protruding from both side edges to the back side, and the pair of arms. The portions are rotatably supported by the pair of support plate portions via the pair of shaft members, and the first cam member is integrally formed with a coaxial tubular portion, and the first cam member and the tubular portion are integrally formed. A core member is pierced and fixed to the portion, and one of the pair of shaft members is formed by the tubular portion and the core member, one end of the core member is fixed to the support plate portion, and the other end portion. Projects from the first cam member and is slidably inserted into the second cam member having a tubular shape.
According to the above configuration, by using the core member, the first cam member can be firmly fixed, the lid can be stably and rotatably supported, and the second cam member can be stably moved in the axial direction. ..

According to the present invention, even if the push-type switchgear is enlarged, it can exhibit a sufficient buffering function against the rotation of the lid in the closing direction.

It is a perspective view which shows the trash can equipped with the push-in type opening and closing device which concerns on one Embodiment of this invention, and shows the state which the lid is closed. It is a figure corresponding to FIG. 1A which shows the state which the lid is opened. It is a plan sectional view of the said switchgear along the line II-II of FIG. 1A. It is a side sectional view of the said switchgear, and shows the state which a lid is closed. FIG. 3A is a view corresponding to FIG. 3A showing a state in which the lid is opened. It is a perspective view which saw the said switchgear from the back side, and shows the state which a lid is closed. It is a figure corresponding to FIG. 4A which shows the state which the lid is opened. It is a perspective view which shows by cutting out the accommodating cylinder part of the holder of a damper mechanism while enlarging the main part of the opening and closing device, and shows the state which the lid is closed. FIG. 5A is a view corresponding to FIG. 5A showing a state in which the lid is opened. It is a perspective view which shows the assembly process of the said damper mechanism, and shows the accommodating cylinder part of a holder cut out. It is a perspective view which shows the damper mechanism disassembled for each component.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a large trash can (storage box) includes a box body 1 and an opening / closing device 2. A rectangular opening 1x (shown only in FIG. 2) is formed on the upper portion of the front wall 1a of the box body 1, and a unitized opening / closing device 2 is mounted on the opening 1x.

As shown in FIGS. 1 to 4, the opening / closing device 2 urges the support frame 10 fixed to the box body 1, the lid 20 rotatably supported by the support frame 10, and the lid 20 in the closing direction. A weight 30 as an urging member and a damper mechanism 40 for suppressing a rotational moment in the closing direction of the lid 20 by the weight 30 are provided as main configurations.

The support frame 10 has a flat frame plate 11 having a rectangular shape when viewed from the front, and a pair of brackets 15 fixed to the back surfaces of the left and right portions of the frame plate 11. The frame plate 11 is arranged so as to cover the peripheral edge of the opening 1x of the front wall 1a from the front, and has an input port 12. Each bracket 15 has a first fixing plate portion 16 fixed to the back surface of the frame plate 11 and a right angle from one side edge (outer edge in the left-right direction) of the first fixing plate portion 16 to the first fixing plate portion 16. The second fixing plate portion 17 projecting to the back side and the supporting plate portion protruding to the back side at right angles to the first fixing plate portion 16 from the other side edge (inner edge in the left-right direction) of the first fixing plate portion 16. Has 18 and. The support frame 10 is fixed to the box body 1 by fixing the second fixing plate portions 17 of the pair of brackets 15 to the left and right edge surfaces of the opening 1x of the box body 1 with screws 60. The support plate portion 18 is formed with a through hole 18a for passing the screw 60.
The support plate portion 18 is wide and projects toward the back of the box body 1, thereby restricting the movement of the hand of a person who has entered the slot 12.

The upper end portions of the lid 20 are rotatably supported by the left and right support plate portions 18 of the support frame 10. More specifically, the auxiliary bracket 25 is fixed to the upper back surface of the lid 20. The auxiliary bracket 25 extends in the left-right direction and is fixed to the back surface of the lid 20 to form a part of the lid 20. The elongated substrate portion 26 and the left and right ends of the substrate portion 26 form a right angle to the substrate portion 26 on the back side. It has a pair of protruding arm portions 27. The base end portions of the pair of arm portions 27 are rotatably connected to the pair of support plate portions 18 of the support frame 10 via the

shaft members

28 and 29, respectively. As a result, the upper end portion of the lid 20 is rotatably supported by the support frame 10 about the horizontal rotation axis L (shown only in FIGS. 3 and 7) extending to the left and right through the

shaft members

28 and 29. ing.
As shown in FIG. 3, the lower end of the lid 20 has a bent shape, and the frame plate 11 of the support frame 10 has a receiving portion 13 that receives the lower end of the lid 20 when the lid 20 is in the closed state. Is formed.

A weight 30 made of a metal rod is bridged between the tips of the pair of arms 27 of the auxiliary bracket 25. As a result, the lid 20 is always provided with a rotational moment in the closing direction generated by the weight of the weight 30.

The damper mechanism 40 is arranged, for example, on the left side when viewed from the back side, and as shown in FIG. 7, the first cam member 41, the second cam member 42, and the linear damper 43 arranged on the rotation axis L , And a holder 45. The first cam member 41, the second cam member 42, and the holder 45 are made of hard resin.

A tubular portion 28a is integrally formed on the first cam member 41, and a metal core member 28b is penetrated and fixed to the first cam member 41 and the tubular portion 28a. As a result, the first cam member 41 is relatively non-rotatable and non-movable in the axial direction with respect to the core member 28b.

One end of the core member 28b has a non-circular cross section, and with the one end fitted in the non-circular shaft hole of the support plate portion 18 of the support frame 10, the screw 61 (see FIG. 5) is inserted into the end face of the core member 28b. The core member 28b and the first cam member 41 are fixed to the support plate portion 18 so as to be non-rotatable and non-movable in the axial direction by being screwed into.

The tubular portion 28a is rotatably inserted into the shaft hole of the arm portion 27 of the auxiliary bracket 25. As a result, the arm portion 27 on the left side when viewed from the back side is rotatably supported by the support plate portion 18 on the left side. The left shaft member 28 is composed of the tubular portion 28a and the core member 28b. The right arm portion 27 is also rotatably supported by the right support plate portion 18 by the shaft member 29.

As is clear from the above description, the first cam portion 41 is fixed to the support plate portion 18 of the support frame 10 so as not to rotate and to move in the axial direction, and is arranged inside the arm portion 27.
As shown in FIG. 7, the other end of the core member 28b projects from the first cam member 41 toward the second cam member 42. The surface of the first cam member 41 facing the second cam member 42 has a shape of repeating peaks and valleys along the circumferential direction, and has a plurality of cam surfaces 41a inclined with respect to the rotation axis L.

The second cam member 42 has a bottomed tubular shape, and the surface facing the first cam portion 41 has a shape of repeating peaks and valleys along the circumferential direction, and a plurality of cams inclined with respect to the rotation axis L. It has a surface 42a. The cam surface 41a of the first cam member 41 and the cam surface 42a of the second cam member 42 have a complementary shape.
The protruding end of the core member 28b is inserted into the second cam member 42 so as to be slidable in the axial direction, and the cam surfaces 41a and 42a of both

cam members

41 and 42 are in contact with each other.

The holder 45 is connected to the back side of the upper end portion of the lid 20, more specifically, the mounting plate portion 46 fixed to the substrate portion 26 of the auxiliary bracket 25, and the upper edge portion of the mounting plate portion 46, and is on the rotation axis L. It integrally has a cylindrical storage cylinder portion 47 that is positioned, and a pair of side plate portions 48 that are connected to the left and right edge portions of the mounting plate portion 46 and are perpendicular to the mounting plate portion 46. The pair of side plate portions 48 are also connected to both ends of the accommodating cylinder portion 47. The strength of the holder 45 is increased by the pair of side plate portions 48.

One end of the storage cylinder 47 is closed and the other end is open. The second cam member 42 and the linear damper 43 are housed in the housing cylinder portion 47. The linear damper 43 is arranged on the closed end 47b side, and the second cam member 42 is arranged on the open end 47a side.

The linear damper 43 has a well-known structure and will be briefly described. However, the linear damper 43 has a cylinder 43a, a piston (not shown) housed in the cylinder 43a, and a rod 43b whose one end is fixed to the piston and protrudes from the cylinder 43a. Due to the resistance of the viscous fluid contained in the cylinder 43a, resistance to the movement of the rod 43b in the contraction direction (backward direction) is generated. It should be noted that a large resistance does not act against the movement of the rod 43b in the extending direction. The rod 43b is urged in the extending direction by a return spring built in the cylinder 43a. The tip of the rod 43b is in contact with the bottom of the second cam member 42.

Key portions 42x are formed on the peripheral surface of the second cam member 42 at intervals in the circumferential direction. By fitting the key portion 42x into the key groove 47x formed on the inner peripheral surface of the accommodating cylinder portion 47 of the holder 45, the second cam member 42 is slidable and non-rotatable in the axial direction, and the accommodating cylinder portion 47 is made non-rotatable. It is supported within.

The damper mechanism 40 having the above configuration is assembled as shown in FIG. The details will be described below. Prior to the final assembly step, the arm portion 27 of the lid 20 is rotatably supported by the support plate portion 18 of the support frame 10 by the

shaft members

28 and 29. The first cam member 41 is fixed to the support plate portion 18 via the shaft member 28, and the first cam member 41 and the core member 28b project inward of the arm portion 27. As described above, the linear damper 43 and the second cam member 42 are housed in the housing cylinder portion 47 of the holder 45.

A first slit 46a extending in parallel with the rotation axis L is formed in a portion of the mounting plate portion 46 of the holder 45 far from the first cam member 41, and extending in the same direction in a portion close to the second cam member 41. The two second slits 46b are formed apart in the vertical direction. The second slit 46b is shorter than the first slit 46a, but the end of the second slit 46b on the first cam member 41 side is open at the side edge of the mounting plate portion 46, and an elongated passage formed in the side plate portion 48 is formed. It is connected to the hole 48a.
Counterbore 46c is formed at the ends of the first slit 46a and the second slit 46b far from the first cam member 41, respectively.
A screw rod 51a corresponding to the first slit 46a and a screw rod 51b corresponding to the second slit 46b are stud welded to the substrate portion 26 of the auxiliary bracket 25.

The final assembly process is performed as follows.
First, with the lid 20 in the open position with respect to the support frame 10 as shown in FIG. 6, the mounting plate portion 46 of the holder 45 is brought into contact with the substrate portion 26 of the auxiliary bracket 25 and positioned at the initial position. At the initial position of the holder 45, one screw rod 51a is inserted into or near the end of the first slit 46a of the holder 45 near the first cam member 41, and the other two screw rods 51b are inserted into the holder 45. It is arranged right next to the passing hole 48a of the side plate portion 48, away from the side plate portion 48.

Next, as shown by the arrow in FIG. 6, it is moved toward the first cam member 41. Then, the cam surface 41a of the first cam member 41 and the cam surface 42a of the second cam member 42 mesh with each other as shown in FIG. 5B. In this process, the screw rod 51a moves along the first slit 29a and reaches the end of the first slit 29a farther from the first cam member 41. Further, the screw rod 51b passes through the passage hole 48a of the side plate portion 48, passes through the second slit 29b, and reaches the end portion (the end portion farther from the first cam member 41). In this state, the nut 52 is screwed into the

screw rods

51a and 51b and tightened toward the counterbore 46c so that the holder 45 is fixed to the substrate portion 26 of the auxiliary bracket 25 (that is, fixed to the lid 20) and the damper. The assembly of the mechanism 40 is completed.

As described above, the linear damper 43 is accommodated in the accommodating cylinder portion 47 of the holder 45, the second cam member 42 is accommodated, and the second cam member 42 is engaged with the first cam member 41 fixed to the support frame 10. By combining them, the assembly work of the damper mechanism 40 can be efficiently performed. Moreover, the second cam member 42 can be aligned with the first cam member 41 by moving the holder 45 in parallel with the rotation axis L, and then the holder 45 can be fixed by the nut 52. The assembly work of the damper mechanism 40 can be efficiently performed.

Further, by lengthening the first slit 46a and opening the second slit 46b at the side edge of the holder 45, the moving stroke of the holder 45 in the assembly process can be lengthened. As a result, the fixing portion by the screw rod 51a and the nut 52 and the fixing portion by the screw rod 51b and the nut 52 can be sufficiently separated in the rotation axis L direction, so that the fixing strength of the holder 45 to the lid 20 can be increased. Can be done. Since the side plate portion 48 is formed with a passing hole 48a for passing the screw rod 51b, the side plate portion 48 does not hinder the movement of the holder 45.

The operation of the switchgear 2 having the above configuration will be described. Normally, the lid 20 is in contact with the support frame 10 due to the rotational moment of the weight 30, and the input port 12 is closed (see FIGS. 1A, 3A, and 4A). At this time, as shown in FIG. 5A, the first cam member 41 and the second cam member 42 are farthest apart, and only a part of the cam surfaces 41a and 42a are in contact with each other. The rod 43b is in the retracted position.

When the user disposes of garbage in the trash can, the lid 20 is manually pushed to open the loading port 12 against the rotational moment in the closing direction (see FIGS. 1B, 3B, and 4B), and the loading port 12 is opened. Drop the trash into the box body 1 from the inserted hand. With the opening of the lid 20, the second cam member 42 rotates with respect to the first cam member 41, and the rod 43b extends due to the cam action of the cam surfaces 41a and 42a and the force of the return spring of the linear damper 43. When the rod 43b pushes the second cam member 42 toward the first cam member 41, the second cam member 42 approaches the first cam member 41 and completely meshes with the first cam member 41 as shown in FIG. 5B.

After that, when the hand is pulled out from the insertion port 12, the lid 20 moves in the closing direction due to the rotational moment of the weight 30. At this time, when the lid 20 is vigorously closed, the lid 20 strongly hits the support frame 10 and a loud noise is generated. However, by reducing the momentum by the damper mechanism 40, it is possible to prevent the generation of a loud noise. More specifically, the second cam member 42 rotates with respect to the first cam member 41 as the lid 20 rotates in the closing direction, and the second cam member 42 moves to the first cam due to the cam action of the cam surfaces 41a and 42a. The rod 43b of the linear damper 43 is pushed by the second cam member 42 and retracts as it moves away from the member 41. In this process, the resistance of the viscous fluid suppresses the movement of the rod 43b and the second cam member 42, and thus the momentum of rotation of the lid 20 in the closing direction is reduced.

As described above, the rotation of the lid 20 in the closing direction is converted into an axial force by the first and

second cam members

41 and 42, and this axial force is received by the linear damper 43, so that the closing direction of the lid 40 Even when the rotational moment of is large, a sufficient buffering function can be exhibited.
The second cam member 42 is housed in the housing cylinder portion 47 of the holder 45 so as to be non-rotatable and slidable in the axial direction, and is also supported by the core member 28b so as to be slidable in the axial direction, so that the second cam member 42 can move stably in the axial direction. As a result, a stable buffer function can be exhibited.

The present invention is not restricted to the above implementation, and various modifications can be adopted without departing from the gist thereof. For example, the rotation axis may be vertical and the lid may be opened sideways.
A spring may be used instead of the weight as an urging member that applies a rotational moment in the closing direction to the lid.
When adopting a configuration in which the upper end portion of the lid is rotatably supported around the horizontal rotation axis, the lid may be made heavier to obtain a rotational moment in the closing direction by the gravity of the lid. In this configuration, the lid itself serves as an urging member.
The storage box is not limited to the trash can, but may be a delivery box, a box for returning DVDs, books, or the like.
The support frame may be integrated with the box body.

The present invention can be applied to a push-type switchgear mounted on a trash can or the like.

Claims

A support frame (10) that defines the slot (12) and
A lid (20) whose end is rotatably supported by the support frame around the rotation axis (L) and opens and closes the insertion port, and
An urging member (30) that imparts a rotational moment in the closing direction to the lid,
The damper mechanism (40) that suppresses the rotation of the lid in the closing direction and
In a push-in type switchgear equipped with
The damper mechanism (40) has first and second cam members (41, 42) and linear dampers (43) arranged on the rotation axis (L), and the first and second cam members are It has cam surfaces (41a, 42a) that are in contact with each other.
The first cam member (41) is non-rotatably supported by the support frame (10), and the second cam member (42) is non-rotatably supported by the lid (20) to rotate the lid. Along with this, one of the first and second cam members (41, 42) moves in the axial direction, and the linear damper (43) is the one of the cam members that rotates with the rotation of the lid in the closing direction. A push-in type opening / closing device characterized in that it is arranged so as to suppress axial movement.
The first cam member (41) is fixed to the support frame (10) so as not to be movable in the axial direction, and the second cam member (10) is moved in the axial direction as the lid (20) rotates. And
The damper mechanism (40) further has a holder (45) fixed to the back side of the lid (20), and the holder has a housing cylinder portion (47) arranged on the rotation axis. The end closer to the first cam member (41) is the open end (47a).
The second cam member (42) and the linear damper (43) are housed in the accommodating cylinder portion (47), the linear damper is arranged on the back side of the accommodating cylinder portion, and the second cam member is the open end. The push-in type opening / closing device according to claim 1, which is arranged on the (47a) side and is slidable and non-rotatable in the axial direction with respect to the accommodating cylinder portion.
The holder (45) has a mounting plate portion (46) integrated with the accommodating cylinder portion (47), and the mounting plate portion has a plurality of slits (46a,) extending in parallel with the rotation axis (L). 46b) is formed, and a plurality of screw rods (51a, 51b) protruding from the lid are fixed to the back side of the lid (20), and the screw rods are far from the first cam member in the slit. The push-in type opening / closing device according to claim 2, wherein the holder is fixed to the back side of the lid by tightening a nut (52) that is inserted through the screw rod and screwed into the screw rod.
The plurality of slits are close to the first slit (46a) formed in the mounting plate portion (46) of the holder (45) at a portion far from the first cam member (41) and the first cam member. The third aspect of the present invention, wherein the end of the second slit close to the first cam member is opened at the side edge of the mounting plate portion, including the second slit (46b) formed in the portion. Push-in type opening and closing device.
The holder (45) has a pair of side plate portions (48) that are orthogonal to the mounting plate portion (46) and are connected to both side edges thereof and are connected to both ends of the accommodating cylinder portion.
Of the pair of side plate portions, the side plate portion (48) closer to the first cam member (41) is connected to the open end of the second slit (46b) and allows the screw rod to pass through. The push-in type switchgear according to claim 4, wherein a hole (48a) is formed.
The support frame (10) has a pair of support plate portions (18) protruding from both side edges to the back side, and the lid (20) has a pair of arm portions (27) protruding from both side edges to the back side. ), And the pair of arms are rotatably supported by the pair of support plates via the pair of shaft members (28, 29).
A coaxial tubular portion (28a) is integrally formed with the first cam member (41), and a core member (28b) is penetrated and fixed to the first cam member and the tubular portion. The core member constitutes one (28) of the pair of shaft members.
One end of the core member (28b) is fixed to the support plate (18), and the other end protrudes from the first cam member (41) to form a tubular second cam member (42). The push-in type switchgear according to any one of claims 2 to 5, wherein the push-type switchgear is slidably inserted.