JP3284012B2 - Riding lawn mower cutter housing support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airframe having front and rear wheels in front and rear, comprising a cutter housing located below the airframe between the front and rear wheels, the front portion of the cutter housing and the front portion of the airframe. The present invention relates to a cutter housing support device of a riding lawn mower, which is connected to be able to move up and down via a link mechanism including a pair of front links connecting between them.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, a U.S. Pat. And a pair of mutually independent front links individually connected to a cutter housing (for example, Japanese Patent Publication No. 62-19803).

[0003]

By the way, when the cutter housed in the cutter housing is started to operate, a force in the right or left direction may act on the cutter housing. In addition, since the lateral rigidity of the cutter housing is not high, it is impossible to prevent the cutter housing from swaying, and the grass surface after mowing sometimes becomes mottled. For this reason, it is desired to increase the lateral rigidity of the front link, but on the other hand, if it is not acceptable to allow the cutter housing to incline slightly to one of the right and left in accordance with the unevenness of the ground, after the mowing. The grass surface cannot be constant.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a cutter for a riding lawn mower that prevents the cutter housing from swaying and allows the cutter housing to slightly tilt to the left or right. It is an object to provide a housing support device.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, an invention according to a first aspect of the present invention is directed to an air conditioner having front and rear wheels provided at the front and rear, a cutter located between the front wheel and the rear wheel and located below the airframe. A cutter housing support device for a riding lawn mower, wherein a housing is vertically connected via a link mechanism including a pair of front links connecting a front portion of the cutter housing and a front portion of the fuselage. Is
The connecting rod has a front end swingably connected to the fuselage, and a reinforcing plate fixed to the rear end of the connecting rod and connected to the cutter housing. contactable abutting plate portion to face the Rutotomoni mutually extending in the longitudinal direction and which are located in.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a pair of brackets are fixed to the front portion of the cutter housing, and both brackets support a front end. The hole is provided with a connecting hole formed by connecting an insertion / removal portion extending upward from the support hole and opening a rear end at an upper portion of the bracket. Insertion holes through which the connection shafts inserted through the connection holes of the brackets are inserted are provided, and one end of the connection shaft is substantially U-shaped, and a locking shaft portion is integrally connected, and one of the brackets is provided with one of the brackets. A locking hole through which the locking shaft is inserted when the connecting shaft is positioned in the support hole; and the one bracket is provided at a protruding end of the locking shaft from the locking hole. A cotter pin that engages with the inner surface side is mounted.

[0007]

According to the structure of the invention [action] according to the first aspect, a reinforcing plate of both front link is mutually transverse direction of the link stiffness of the cutter housing by abutting is increased at the contact plate portion, moreover both The reinforcing plate is relatively movable up and down, and it is permissible that the cutter housing is slightly inclined to the left or right.

According to the first aspect of the present invention, if the split pin is removed from the locking shaft and the locking shaft is pulled out of the locking hole, the connecting shaft is moved from the insertion / removal hole. It can be pulled out above the bracket, facilitating connection and disconnection between the front links and the cutter housing.

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 9 show an embodiment of the present invention. FIG. 1 is a side view of a riding lawn mower, and FIG.
FIG. 3 is a view taken along line 3-3 of FIG. 1 in a clutch-off state, FIG. 4 is a view corresponding to FIG. 3 in a clutch-on state, and FIG. FIG. 6 and FIG.
7 is an enlarged sectional view taken along line -6, FIG. 7 is a sectional view taken along line 7-7 in FIG. 6, FIG.
9 is a perspective view of a pair of front links, and FIG. 9 is an enlarged sectional view taken along line 9-9 of FIG.

First, referring to FIG. 1 and FIG.
A pair of front wheels W on the front_F, W_FIs steerably suspended
You. On the other hand, a mission case 12 is located behind the fuselage 11.
The left and right sides of the transmission case 12 are fixed.
The rear axle housings 13, 13 fixed to the side
Rear wheel W_R, W_RAre rotatably supported. Thus,
Input to the input shaft 14 protruding from the upper part of the case 12
The transmitted power is transmitted through the transmission mechanism in the transmission case 12 and the transmission mechanism.
And both rear wheels W via a differential mechanism (not shown)_R, W _RBiography
Is reached.

A support frame 15 is fixed on the fuselage 11 at the rear side of the engine E, and a cover 16 having a column portion 16a extending over the support frame 15 is fixed to the fuselage 1.
1 is attached so as to cover its upper part. The Thus to the column portion 16a, is rotatably accommodated supported by steering shaft 17 by the support frame 15 extends front wheels W _F, the W _F in the vertical direction in order to steer, the steering shaft 17 A steering handle 18 located above the column 16a is fixed to the upper end of the steering wheel 18a. Also, at a position spaced rearward from the column portion 16a, the cover 16
An occupant seat 19 for steering the steering handle 18 is provided. Further, the engine E on the body 11 is covered with a bonnet 20 connected to the body 11 so as to be able to jump forward.

Power from a crankshaft 22 having a substantially vertical axis and extending downward from the engine E is transmitted to an input shaft 14 of the transmission case 12 via power transmission means 23. The power transmission means 23 includes a drive pulley 24 fixedly provided at an intermediate portion of the crankshaft 22, a driven pulley 25 fixedly provided on the input shaft 14, and rear wheel power wound around the drive pulley 24 and the driven pulley 25. Endless belt for transmission 26
An endless belt 26 for transmitting rear wheel power is also wound around idle pulleys 27 and 28 which are rotatably supported by the body 11. Further, a tension roller 29 is brought into contact with the outer periphery of the rear wheel power transmission endless belt 26 between the driven pulley 25 and the idle pulley 28, and this tension roller 29 tensions the rear wheel power transmission endless belt 26. The rear wheel power transmission endless belt 26 is brought into frictional contact with each of the pulleys 24 to 28, and the rear wheel power transmission endless belt 26 is relaxed in tension to reduce the rear wheel power transmission endless belt 26 and each pulley 24. ２８28 to be slidable.

[0014] Referring also to FIGS. 3 and 4, the front wheels W _F, W _F and the rear wheels W _R, the cutter housing 30 is arranged below the body 11 between the W _R, the cutter housing 30 Is supported by the body 11 so as to be able to move up and down by the link mechanism 31.

The cutter housing 30 is formed in a dish shape with an open bottom, and accommodates a pair of cutters 32 ₁ and 32 _{2. The} cutter housing 30 discharges grass cut by the cutters 32 ₁ and 32 ₂ . An outlet 33 is provided on one side of the cutter housing 30. Also, on both sides of the cutter housing 30, a scalp roller 3 that rolls on the ground to define the lowermost position of the cutter housing 30 is provided.
4, 34 are pivotally supported.

Referring also to FIG. 5, a cutter housing is shown.
Rotating shaft 45 extending vertically ₁, 45_TwoRotate
Bearing housing 46₁, 46_TwoIs stuck
The rotary shaft 4 in the cutter housing 30.
5₁, 45_TwoCutter 32 at the lower end of₁, 32_TwoIs fixed
It is.

Crankshaft 2 of engine E as power source
2 and the rotating shafts 45 ₁ , 45 of the cutters 32 ₁ , 32 _2
2 , a winding transmission means 47 is provided. The winding transmission means 47 includes a driving pulley 48 fixed to the lower end of the crankshaft 22 and rotation shafts 45 ₁ and 45 ₂ above the cutter housing 30. It provided between the driven pulley 49 _1, 49 ₂ which is fixed to an upper end portion, and a drive pulley 48 and both the driven pulley 49 _1, 49 ₂ wound endless belt 50 to be multiplied.

Referring to FIGS. 6 and 7, a support shaft 5 is provided substantially at the center of the upper surface of the cutter housing 30.
3 is fixed by bolts 54, and the base end of the tension arm 51 is rotatably supported by the support shaft 53. That is, a support cylinder 55 extending upward is fixed to the base end of the tension arm 51, and the support shaft 53 is fitted into the support cylinder 55 so as to be relatively rotatable. A tension roller 52 is supported at the free end of the tension arm 51 via a shaft 56 having an axis parallel to the support shaft 53, and the tension roller 52 comes into contact with the endless belt 50 on the outer surface side. . Thus, the tension arm 51 tensions the endless belt 50 with the tension roller 52 and the clutch-off position (the position shown in FIG. 3 and the position indicated by the solid line in FIG. 7) for alleviating the tension of the endless belt 50 by the tension roller 52. it is pivotable between a clutch-on position for frictional contact with the endless belt 50 to the drive pulley 48 and the driven pulley 49 _1, 49 ₂ (position indicated by a chain line in FIG position and in FIG. 4 7) Te.

A spring 57 is contracted between the upper end of the shaft 56 at the free end of the tension arm 51 and a bracket 58 fixed to the rear of the cutter housing 30. It functions to resiliently hold the clutch off position and the clutch on position of the arm 51, respectively. That is, the tension arm 5
When the bracket 1 is rotated between its clutch-off position and the clutch-on position, the position of the bracket 58 is determined so that the spring 57 crosses the support shaft 53 at the base end of the tension arm 51. 7 urges the tension arm 51 in the clockwise direction, and the spring 57 exerts a spring force in a direction in which the tension of the endless belt 50 by the tension roller 52 is reduced. The spring 57 exerts a spring force in a direction for urging the tension arm 51 in the direction to increase the tension of the endless belt 50 by the tension roller 52.

The bearing housing 46 ₁ has an endless belt 5
0 intermediate portion of the brake lever 59 ₁ having a brake shoe 60 ₁ which can pressed against the outer circumference of the driven pulley 49 ₁ at one end is rotatably supported via a shaft 62 _1, the bearing housing 46 _2, an endless belt 50 to the driven pulley 49 ₂
Intermediate portion of the brake lever 59 ₂ having a brake shoe 60 ₂ can pressed against the one end side on the outer periphery of the is rotatably supported via a shaft 62 _2. Thus, axes 62 ₁ and 62 ₂ are
The bearing housings 46 ₁ and 46 ₂ are connected to the cutter housing 3
It also serves as one of a plurality of bolts for fixing to zero.

Brake lever 59₁The other end of the
A brake rod 61 is provided between the base ends of the₁To
And the brake lever 59_TwoAt one end
And shaft 62_TwoBrake rod 61 between_TwoThrough ten
The arm 51 is connected to the base end. This allows
As shown in FIG. 3, the tension arm 51 is clutch-off.
In the state in which the brake lever 59₁, 59_Two
Are brake shoes 60 at one end of them.₁, 60_TwoBy
Endless belt 50 to driven pulley 49₁, 49 _TwoPress
To stop the running of the endless belt 50 forcibly.
And Therefore, the tension arm 51 is
In the off position, the tension of the endless belt 50 is loose.
In addition to being summed, the running of the endless belt 50 is forcibly stopped.
The driving pulley 48 is stopped by the endless belt 5.
It will spin while contacting zero. Also tension
The arm 51 is in the clutch-on position as shown in FIG.
In the state, both brake levers 59₁, 59_TwoAre those
Brake shoe 60 at one end₁, 60_TwoEndless belt 5
It will be moved away from zero. Therefore tension
When the arm 51 is at the clutch-on position,
In addition to the increased tension of the belt 50, the endless belt 50
Is allowed, and the drive pulley 48
Both driven pulleys 49 are driven by the power transmitted to the end belt 50.
₁, 49_TwoThat is, both cutters 32₁, 32_TwoIs a rotating drive
Will be moved.

A connecting arm 64 is integrally connected to the base end of the tension arm 51. That is, the base end of the connecting arm 64 is fixedly provided on the support tube 55 at the base end of the tension arm 51 so as to form an angle with the tension arm 51 in plan view.

As shown in FIG. 2, the operating shaft 65 extending substantially vertically in the column portion 16a of the cover 16
, The operating shaft 65 is rotatably supported by the support frame 15, and is directly above the cutter housing 30. 11, a pair of screw members 69, 6
Bearing member 68 provided on the supporting member 67 fastened at 9
It is rotatably supported by.

An operation lever 70 is fixed to the upper end of the operation shaft 65. The operation lever 70 is arranged above the column portion 16a and near the steering handle 18. The operation lever 70 is operated between a clutch-off position indicated by a solid line in FIG. 7 and a clutch-on position indicated by a chain line in FIG. 7, and the operation shaft is operated in accordance with the operation of the operation lever 70. 65 also rotates between the clutch off position and the clutch on position. A spring 72 (see FIG. 1) is provided between the support frame 15 and the operation shaft 65 so as to resiliently hold the clutch-off position and the clutch-on position of the operation lever 70 and the operation shaft 65, respectively.

A base end of a drive arm 75 is fixed to the lower end of the operation shaft 65 immediately above the cutter housing 30 in the vicinity of the tension roller 52.
Is rotated in a plane substantially parallel to the operation plane of the connecting arm 64 integrated with the tension arm 51 in accordance with the rotation of the operation shaft 65 by operating the operation lever 70. In addition, the support member 67 includes a stopper 76 that abuts against the drive arm 75 when the operating shaft 65 is at the clutch off position to maintain the operating shaft 65, that is, the clutch off position of the operating lever 70. A stopper 77 is provided which comes into contact with the drive arm 75 and maintains the clutch-on position of the operation shaft 65, that is, the operation lever 70, when the state becomes.

The drive arm 75 fixedly connected to the operation lever 70 and the connection arm 64 fixedly connected to the tension arm 51 are connected via a connection rod 78. That is, substantially right-angled bent portions 78 a and 78 b are provided at both ends of the connecting rod 78, and the bent portion 78 a at one end is provided with an engagement hole 79 provided in the drive arm 75.
And the bent portion 78b on the other end side is engaged with the engaging hole 80 provided in the connecting arm 64. Thus, a pair of washers 81, 8 sandwiching the drive arm 75 at the bent portion 78a.
Pins 82, 82 are mounted on the outer side of the pair 1 and a pair of washers 8 sandwiching the connecting arm 64 at the bent portion 78b.
Pins 84, 84 are mounted on the outer side of 3, 83, respectively. Therefore, by inserting and removing the pins 82, 82, 84, 84, both ends of the connecting rod 78 are detachably connected to the drive arm 75 and the connecting arm 64.

When the cutter housing 30 is moved up and down, the drive arm 75 and the connection arm 64 of the connection rod 78 are moved.
Both engagement holes 79 and 80 are formed as long holes in order to allow a change of the connection position to the connection holes.

Referring to FIG. 8 and FIG.
The link mechanism 31 provided between the cutter housing 1 and the cutter housing 30 has a pair of brackets 87 ₁ whose front ends are connected to the body 11 by supporting shafts 85, 85 having the same axis, and which is fixed to the front part of the cutter housing 30. , 87
A pair of front link 88 _1, 88 ₂ which rear end is connected through a common connecting shaft 86 to _2, the support shaft 8 in which the axis the same
9,89 shaft front end has the same the axis to a pair of brackets 90 _1, 90 ₂ which is fixed to the rear of the cutter housing 30 while being connected to the machine body 11 by 91
, A pair of rear links 92 ₁ , the intermediate portions of which are connected via
Consisting of 92 _2. Thus, each spindle 85, 85, 91, 9
Reference numeral 1 denotes a so-called parallel link, which is arranged so as to be positioned at each apex angle of the parallelogram in a side view. Therefore, the cutter housing 30
Means ascending and descending with its posture relative to the ground constant.

On the left side of the passenger seat 19, the base end of an elevating operation lever 93 is rotatably supported on the body 11.
The rear end of the rear link 92 ₁ in the link mechanism 31 is connected to an intermediate portion of the elevating control lever 93 via a connecting member 94. Thus, the lifting operation lever 93 can hold a plurality of rotation operation positions. That is, the lifting operation lever 93
The operation lever 93 is held in a plurality of grooves 96 provided in the guide plate 95 by the rotation and left and right operations of the guide plate 95, so that the cutter housing 30 is held at a plurality of upper and lower positions so as to move up and down. 93 can be moved up and down.

By the way, both front links 88 ₁ , 88
₂ includes a connecting rod 97 whose front end is swingably connected to the body 11 by a support shaft 85, and a reinforcing plate 98 fixed to the rear end of the connecting rod 97 and connected to the cutter housing 30, respectively. It is composed. Thus to the reinforcing plate 98, Rutotomo extends in the longitudinal direction of the machine body 11
The abutment can be opposed to each other (and away as shown in Figure 9
The contact plate 98a may be formed in a substantially U-shape that is opened downward with an abutting plate portion 98a on the inner side, and an outer portion of the reinforcing plate 98. Connecting rod 9
7 is fixed at the rear end. Moreover, insertion holes 99, 99 through which the connecting shaft 86 is freely inserted are provided on both side portions of the reinforcing plates 98, respectively.

Both brackets 87₁, 87_TwoThe ream
A connection hole 100 through which the connection shaft 86 can be inserted is provided.
The connecting hole 100 is provided at the front end of the supporting hole 100a.
The bracket extends upward from the support hole 100a and
To 87₁, 87_TwoInsertion / removal hole 10 opening the rear end at the top of
0b are continuously provided. Further, one bracket 87 ₁
Is provided with a locking hole 101.

On the other hand, one end of the connecting shaft 86 has a substantially U-shaped locking shaft 86a integrally connected thereto.
The locking shaft 86a can be inserted into the locking hole 101 in a state where the connecting hole 86 is located in the support hole 100a. Also the projecting end of the locking hole 101 of the engaging shaft portion 86a split pin 102 which engages the inner surface of the bracket 87 ₁ is mounted.

Next, the operation of this embodiment will be described. When the operation lever 70 is rotated between the clutch-off position and the clutch-on position, the drive arm 7 is rotated.
5, via the connecting rod 78 and connecting arms 64, the tension arm 51 is made to rotate between the clutch-off position and the clutch-on position, the wrapping for transmitting power from the crankshaft 22 to both the cutter 32 _1, 32 ₂ Transmission means 4
7 is switched between the power cutoff state and the power transmission state.

[0034] In Thus, the clutch-off of belt-driven means 47 for switching to the clutch-on, in response to the endless belt 50 is tensioned, the rotary shaft 45 ₁ of FIG. 4 arrow 103
, A cutter housing 30 tends to move rightward toward the front. However, the front links 88 ₁ , 88 in the link mechanism 31
_{The second} reinforcing plate 98 includes contact plate portions 98a that face and contact each other along the front-back direction of the body 11;
Rigidity of both the front ring 88 _1, 88 ₂ along the lateral direction of the cutter housing 30 is relatively high. Therefore, the roll of the cutter housing 30 is avoided, and the cutter 3
2 _1, 32 ₂ turfgrass surface after cutting by does not become mottled. Moreover both front link 88 _1, 88 ₂ are independent of each other, the connecting shaft 86, both front link 88 _1,
88 ₂ of the insertion holes 99, 99 ... to have been遊通inserted. Therefore, it is permissible for the cutter housing 30 to be slightly inclined by raising either the left or right, and the cutter housing 30 can be slightly inclined to one of the left and right according to the unevenness of the ground. It can be constant.

When the split pin 102 is removed from the locking shaft portion 86a and the locking shaft portion 86a is pulled out from the locking hole 101, the connecting shaft 86 inserted into the connecting holes 100, 100 is formed.
The supporting hole portion 100a both brackets 87 ₁ via the insertion and removal hole 10b from 87 it is possible _{to two} out go upwards, both front link 88 _1, 88 ₂ and facilitates decoupling between the cutter housing 30 And front link 8
8 _1, 88 coupling operation between ₂ and cutter housing 30 is facilitated.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible.

[0037]

As described above, according to the first aspect of the present invention, the two front links are connected to each other at a front end thereof so as to be swingable with the body, and are fixed to the rear end of the connection rod. And a reinforcing plate connected to the cutter housing.The reinforcing plates at both front links extend in the front-rear direction of the fuselage.
The contacting plate portion to face possible abutment is provided Rutotomoni each other, mutual both front link it is possible to prevent the rolling of the cutter housing to increase the rigidity of the left and right directions of the front link In this way, the cutter housing can be allowed to slightly tilt to the left or right, so that mowing does not occur, and lawn mowing can be performed with a fixed lawn surface after mowing.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a pair of brackets are fixedly provided at a front portion of the cutter housing, and both brackets support a front end. The hole is provided with a connecting hole formed by connecting an insertion / removal portion extending upward from the support hole and opening a rear end at an upper portion of the bracket. Insertion holes through which the connection shafts inserted through the connection holes of the brackets are inserted are provided, and one end of the connection shaft is substantially U-shaped, and a locking shaft portion is integrally connected, and one of the brackets is provided with one of the brackets. A locking hole through which the locking shaft is inserted when the connecting shaft is positioned in the support hole; and the one bracket is provided at a protruding end of the locking shaft from the locking hole. A split pin that engages with the inner surface of the The coupling and uncoupling operations between tank and both brackets can be facilitated.

[Brief description of the drawings]

FIG. 1 is a side view of a riding lawn mower.

FIG. 2 is a plan view of FIG.

FIG. 3 is a view taken along line 3-3 in FIG. 1 in a clutch-off state.

FIG. 4 is a view corresponding to FIG. 3 in a clutch-on state.

FIG. 5 is an enlarged sectional view taken along line 5-5 of FIG. 3;

FIG. 6 is an enlarged sectional view taken along line 6-6 of FIG. 3;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 6;

FIG. 8 is a perspective view of a pair of front links.

FIG. 9 is an enlarged sectional view taken along line 9-9 of FIG.

[Explanation of symbols]

11 ... body 30 ... cutter housing 31 ... link mechanism 32 ₁ , 32 ₂ ... cutter 86 ... connecting shaft 86a ... locking shaft portion 87 ₁ , 87 ₂ ... bracket 88 ₁ , 88 ₂ ··· front link 97 ··· connecting rod 98 ··· reinforcing plate 98a ··· abutment plate 99 ··· insertion hole 100 ··· connecting hole 100a ··· support hole 100b ... insertion and removal hole 101 ... locking hole 102 ... split pin W _F ... front wheel W _R ... rear wheel

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01D 34/64 A01B 59/044

Claims (2)

(57) [Claims] 1. A front wheel (W _F) and the machine body (11) with a rear wheel (W _R) before and after, the front wheel (W _F) and the rear wheels (W
_R ), a cutter housing (30) located below the fuselage (11) includes a pair of front links (88 ₁ , 88 ₁ ) connecting the front of the cutter housing (30) and the front of the fuselage (11). in the cutter housing support device riding lawn mower that is vertically movably linked via a link mechanism (31) comprising 88 _2), both front link (88 _1, 88 ₂₎
A connecting rod (97) having a front end swingably connected to the body (11), and a reinforcing plate (97) fixed to the rear end of the connecting rod (97) and connected to the cutter housing (30). 98), and both front links (88 ₁ ,
88 ₂₎ reinforcing plates (98), riding lawn mowing, characterized in that the abutment can contact plate portion to face the Rutotomoni mutually extending in the longitudinal direction of the machine body (11) (98a) is provided Machine cutter housing support device. 2. A pair of brackets (87 ₁ , 87 ₂ ) are fixed to the front part of the cutter housing (30), and both brackets (87 ₁ , 87 ₂ ) have support holes (1) at the front end.
00a), a connecting hole (10) is formed by continuously connecting an insertion / removal hole (100b) extending upward from the support hole (100a) and opening the rear end at the upper part of the bracket (87 ₁ , 87 ₂ ).
0) is provided, and both front links (88 ₁ , 88
₂ ) At the rear end, there are provided insertion holes (99) through which the connection shafts (86) inserted through the connection holes (100) of the brackets (87 ₁ , 87 ₂ ) are passed. 8
A locking shaft portion (86a) is integrally formed at one end of 6) in a substantially U-shape, and the connecting shaft (86) is provided on one bracket (87 ₁ ) with the support hole portion (100a). The locking hole (1) through which the locking shaft (86a) is inserted in the state
01) is provided, and the locking hole (1) of the locking shaft portion (86a) is provided.
01) is attached to the one bracket (87).
_2. A cutter housing support device for a riding lawn mower according to claim 1, wherein a split pin (102) engaging with the inner surface side of (1) is mounted.