KR101956663B1 - Stall for pig raising with expandable enterance - Google Patents

Abstract

The present invention relates to a swan stole having an expandable inlet, and more particularly, to a swan stall having a swivel structure in which a part of the side wall adjacent to the inlet is rotatably provided by separating and feeding one swine, To a swan stole having an expandable inlet that can reduce the width of the entryway located between the stalls and thereby reduce the size of the breeding ground.

Description

STALL FOR PIG RAISING WITH EXPANDABLE ENTERANCE < RTI ID = 0.0 >

The present invention relates to a swan stole having an expandable inlet, and more particularly, to a swan stall having a swivel structure in which a part of the side wall adjacent to the inlet is rotatably provided by separating and feeding one swine, To a swan stole having an expandable inlet that can reduce the width of the entryway located between the stalls and thereby reduce the size of the breeding ground.

In general, pig farms are confined to a large number of stalls in a narrow space to increase the rate of growth of pigs during breeding or to increase the breeding rate. The use of stalls in this way is intended to provide rapid growth and propagation effects of pigs over a small area.

Particularly when used for reproduction, artificial insemination and reproductive cycles are repeated twice or more per year, so that the pigs can enter and exit the stall periodically.

The presently provided stall includes a side wall, a front wall, and a rear wall, and a plurality of the stalls are connected in parallel. The stall is disposed in a plurality of rows, and an entrance and exit through which the pig can move is provided between the stall column and the stall column.

Here, since the entrance and exit is composed of a stalk and a right angle, it is necessary for the pig to have enough free space to turn the body in order to enter the pig. Therefore, the entrance and exit between existing stalls should be at least 900 ~ 1000mm wide so that pigs can enter or exit the stall through entrance and exit. This is somewhat contrary to the purpose of the stall to increase the efficiency of breeding in a narrow area, because the area of the stall is increased for pig access.

Korean Registered Utility Model No. 20-0143791 (registered on Jan. 28, 1999, hereinafter referred to as "Prior Art 1") proposed a feeder device capable of pushing livestock. The prior art document 1 includes a frame structure in which a sensing sensor is installed in the middle and a door is opened by a cylinder 40 operated by a sensing signal of the sensing sensor at an entrance thereof; And a feeder installed on the opposite side of the entrance of the frame structure to feed a predetermined amount of feed to the pedestal by a detection signal of the detection sensor 20, And a cylinder connected to the support frame so as to be rotatable on the upper portion of the frame structure. The above prior art document 1 is a structure for efficiently feeding feeds. Since the length of the entrance and the internal space are set to be perpendicular to each other, the width of the entrance and exit is required to be wide when entering through the entrance.

Korean Unexamined Patent Publication No. 10-2017-0037105 (published on Apr. 04, 2014; hereinafter referred to as 'Prior Art Document 2') proposed a reinforcing concrete pregnancy stall for swine and a molding device thereof. The prior art document 2 includes a diaphragm, a front door, a rear door, a top connecting rod, and a food container assembled to the front door; The diaphragm, the front door, the rear door, and the upper connecting rod are made of reinforced concrete using high strength concrete. The diaphragm is formed at a predetermined interval between the horizontal and vertical walls of the outer frame, The front and rear doors of the diaphragm are connected to hinged brackets by latches so as to be openable, respectively. The upper and lower portions of the diaphragm are connected to each other by a latch An upper connecting rod is installed in a direction orthogonal to the diaphragm and fixed by bolts and nuts to prevent shaking of the diaphragm. The prior art document 2 is characterized in that the wall constituting the stall is made of concrete. However, since the entrance and the inner space are installed vertically, the pig is rotated in the entrance portion to enter or exit the stall. There must be enough space available.

Korean Registered Utility Model No. 20-0143791 (Registered on January 28, 1999): Feeding device capable of pushing off livestock Korean Patent Laid-open No. 10-2017-0037105 (published Apr. 04, 2014): Reinforced Concrete Pregnancy Stall for Swine and Molding Device

Accordingly, in the pig stall of the present invention,

The stall of the stall is provided in an expandable form so that the stall can be easily turned in the direction of the pig when the pig enters or leaves.

In order to solve the above problems,

A swan stall, which is installed in a pig farm and confines pigs, is provided with a plurality of side walls fixedly installed on the bottom of the farm; A front wall in which both sides of the inner region formed by adjacent two sidewalls are respectively coupled to ends of the two sidewalls in a forward direction in which feed is supplied; A sidewall comprising a main body side wall coupled to the front wall and a rear side wall which is openably and closably attached to two side wall end portions in a direction opposite to the front wall, And the auxiliary rotation side wall is located on the same line as the main body side wall by the coupling means or by rotating the coupling means on the hinge axis to expand the entrance side of the inside area do.

The side wall, the front wall, and the rear access wall include an outer frame; And a supporting body for supporting the inside of the outer frame vertically or horizontally.

The coupling between the side wall, the front wall, and the rear entrance / exit wall is achieved by integrally joining the upper and lower end brackets formed with vertical through-holes in the outer frame portions on both sides, which are both side ends of the respective members, The end brackets of the adjacent members may be overlapped with each other to align the vertical through holes, and then the bolts or the engagement rods may be inserted and coupled.

In addition, the coupling means may be a rectangular plate formed to be elongated in the longitudinal direction and partially integrated with the upper and lower outer frames of the auxiliary rotation side wall, the coupling portion being integrally coupled to the auxiliary rotation side wall at one side thereof, A coupling base vertically perforated by a predetermined distance from the coupling portion and vertically perforated so as to form an elongated hole at the other end opposite to the coupling portion in the vicinity of the fixed hole; First and second coupling holes vertically perforated in a longitudinal direction at a predetermined distance from the upper and lower outer frames of the main body side wall; And first and second fixing pins sequentially inserted into the fixing hole or the hole of the coupling band and the first coupling hole or the second coupling hole to be coupled with each other.

The extension hole length of the auxiliary rotation side wall may be 0.1 to 0.3 times the width of the width between the two side walls, and may extend when the coupling is rotated to be coupled to the end side of the opposite side auxiliary rotation side wall.

Further, the auxiliary rotation side wall may be provided with an extension bracket at the support end in the direction of the end close to the rear entrance and exit wall, and may be fixed to the end bracket coupled to the end of the adjoining auxiliary rotation side wall rotated by the hinge, .
In addition, the separately constructed main body side wall and the auxiliary rotation side wall may be provided with shaft fixing means on a wall surface close to each other, the shaft fixing means may include a shaft fixing pipe integrally formed at either side of the main body side wall and the auxiliary rotation side wall, And the shaft fixing projections of the shaft fixing means are detached from the shaft fixing pipe when the auxiliary rotation side wall is extended by the coupling means, The shaft fixing projections of the shaft fixing means can be inserted into the shaft fixing pipe to join the auxiliary rotation side wall and the main body side wall.

The swash stall of the present invention by the above-

A portion of the sidewall to which the entrance and exit walls are coupled is formed in a rotatable structure so that when the pig enters or leaves the stall, a portion of the sidewall is pivoted to the adjacent stall region to expand the entrance, Direction can be easily made so that the width of the access road can be reduced and the area of the stall can be increased by reducing the area of the breeding ground or reducing the width of the access road while maintaining the number of pigs, It is now possible to provide useful facilities.

1 is a perspective view of a stand-alone stall in accordance with an embodiment of the present invention.
Figure 2a is a plan view of a side wall of a stall in accordance with an embodiment of the present invention;
Figures 2b and 2c are plan views illustrating aspects of a stall in accordance with another embodiment of the present invention.
FIG. 3 is a partial perspective view showing only part of a combined state of a side wall and a rear-side access wall according to an embodiment of the present invention; FIG.
4 is a perspective view of a main part of a side wall according to the present invention,
5A to 5C are a cross-sectional view and a plan view, respectively, illustrating a state in which the side walls are engaged with coupling means according to an embodiment of the present invention.
6A and 6B are views showing a breeding facility having a general arrangement structure in which a plurality of stoles having a structure in which a part of a side wall of the present invention is rotatable according to the present invention is installed and an access road is formed.
7A to 7D are plan views showing only a part of an example of coupling of the auxiliary rotation side wall according to the present invention to the adjoining auxiliary rotation side wall.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are shown enlarged or reduced from the actual size for the sake of clarity of the present invention.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises", "having", or "having" are used to specify that there is a feature, a number, a step, an operation, an element or a combination thereof disclosed in the specification, It should be understood that the foregoing does not preclude the presence or addition of other features, numbers, steps, operations, elements, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as commonly used and predefined terms should be construed to have meanings consistent with their contextual meanings in the relevant art and are not to be construed as ideal or overly formal in meaning unless expressly defined in the present application .

In addition, although the present invention has been described with reference to a stall using a pig as an example, it includes all cattle that can be raised other than pigs.

FIG. 1 is a perspective view showing a pig stall according to an embodiment of the present invention. FIG.

As described above, the pig stall 10 of the present invention includes a plurality of side walls 20, a front wall 30 coupled to both longitudinal ends of the adjacent side walls, And a rear entrance and exit wall 40 which is coupled to the inside to enter or exit the pig into the inside area.

The side wall 20 is formed by combining two side walls 20 with one front wall 30 and the rear entrance and exit wall 40 to form one stall 10, One side wall is used as the side wall of both stoles. That is, n + 1 sidewalls are required for n stalls manufactured in parallel.

The side wall 20 is formed with an outer frame 24 along the edge thereof and is connected to the support piece 25 vertically or horizontally to the inside of the outer frame so as to strengthen the structure and isolate the inner pig.

In addition, the outer frame 24 may be formed in various shapes such as a shape of a cylinder or a plate, and the lower part may be formed as a cylinder having a large structural strength, and the remaining outer frame and the support body may be formed as a plate can do.

Further, the side wall 20 is formed by extending at least two support legs 26 on the bottom surface of the outer frame so as to firmly fix the support legs 26 on the floor of the kennel. Therefore, since the outer frame 24 constituting the side wall 20 is spaced apart from the ground of the grower by a predetermined height, it is possible to prevent the outer frame 24 from being corroded by the generated swine or urine.

In addition, the support legs 26 can prevent corrosion caused by swine and urine by resin coating the outer surface, and it is possible to minimize contact between pigs and urine by covering a resin jacket in addition to the resin coating.

In addition, the side walls 20 are installed at predetermined intervals, and the lower portion is fixed to the floor of the cradle through the support legs 26, and a fixing table 50 is installed in a direction orthogonal to the longitudinal direction of the side walls, Can be maintained. In the case where only one stall is provided, the fixing table 50 may be fixed only to two side walls to fix the upper portion of the side wall. In the case where a plurality of side walls are arranged in parallel to form a plurality of stall regions, It is possible to prevent the side wall from being tilted to one side by the external force while maintaining the gap between the side walls by fixing the upper side of the side wall.

The front wall 30 and the rear entrance and exit wall 40 are formed with the outer frame 31 along the edge like the side wall and the support pillars 32 are formed on the inner side in the vertical and lateral directions, . The front wall 30 is provided with a feed cask or a feeder to enable continuous feeding of pigs, and the rear entrance and exit walls are coupled to the access road so that they can be opened and closed.

The front wall 30 and the rear wall 40 are respectively coupled to both ends of two side walls fixed to the floor at the previous intervals to close both side ends of the inside space formed by the two side walls.

As shown in FIGS. 2A and 3, at least two end brackets 27 are formed in the longitudinal direction at the end of the side wall 20 so as to be connected to the side wall 20, An end bracket 33 is formed on the front wall and the rear wall so as to correspond to the end bracket 27 of the side wall in the longitudinal direction so that the front wall and the side wall brackets 27, And then the bolts are fastened to each other, or a method of inserting the fastening rods 28 into the vertical through holes. Thus, the front wall and the side wall are joined together by various known methods. It is preferable that the front wall and the rear outlet wall are formed to be spaced apart from the bottom of the cage by a predetermined height so as to prevent corrosion by manure. Also, the latching rod 28 is provided with a latching means for preventing any detachment from the end bracket . For example, an engaging member protruding from the lower portion of the engaging rod by pivoting is provided in the engaging rod. The engaging member is supported by a spring so that the protrusion is exposed to the outside. When the button is pressed, To the inside of the latching rod. When the latching bar is provided, when the button is clicked, the end of the latching bar is passed through the vertical hole of the end bracket in a state in which the projection is inserted, and then the projection is protruded by removing the pressure of the button. Therefore, it is possible to easily attach and detach the latching rod, to prevent the latching rod from being separated by an arbitrary external force, and to maintain the stall structure.

When the front wall 30 and the rearward / outward wall 40 are removed from only one side of the side wall 20, the remaining fastening portions can be turned as hinge shafts. Therefore, the rearward / And the front wall can be used as an emergency door that allows the pig to be removed from the inside area in an emergency.

As described above, the swash stall 10 of the present invention, which comprises the side wall 20, the front wall 30, and the rear entrance and exit wall 40, is designed to prevent the pig from entering the stall inner area through the rear entrance / It is possible to provide the inlet portion with an expandable structure such that it can be easily carried out or easily released from the stall interior region to the access road.

2A, the side wall 20 of the present invention is divided into a main body side wall 21 coupled with the front wall and an auxiliary rotation side wall 22 coupled with the rear entrance and exit wall 40 to be in contact with the access road May be provided separately or in a variable form.

The main body side wall 21 and the auxiliary rotation side wall 22 are connected by a coupling means 23. The main body side wall and the auxiliary rotation side wall are arranged in line so as to secure an internal space, The auxiliary swivel side wall 22 is rotated with the hinge shaft as a hinge axis to enlarge the entrance side close to the access road in the inside area so that the pig can be easily moved between the access road and the stall inside area.

The coupling means 23 may be formed on the outer frame 24 constituting the side wall, or may be combined using a separate member.

2A and 4, the coupling means 23 according to the embodiment of the present invention includes: a coupling base 231 having a rectangular plate shape integrally coupled to the auxiliary rotation side wall 22; First and second engaging holes 235 and 236 vertically perforated at predetermined intervals in the longitudinal direction on the upper and lower outer frames of the main body side wall; The first and second fixing pins 237 and 238 are sequentially inserted into the fixing hole 233 or the extended hole 234 of the coupling band and the first coupling hole or the second coupling hole.

Particularly, the coupling portion 231 is formed in a plate-like shape, and a coupling portion 232, which is a portion of the coupling portion 231 in the longitudinal direction, is integrally coupled to the auxiliary rotation side wall 22, And the engaging part 232 is integrally coupled to the lower outer frame part so that the remaining part of the engaging part protrudes in the longitudinal direction. In addition, the coupling base 231 vertically perforates the fixing hole 233 at a portion spaced apart from the coupling portion by a predetermined length among the portions protruding in the longitudinal direction, and has a long uniaxial The through hole 234 may be vertically perforated. The coupling base 231 may extend from the main side wall 21 to the auxiliary rotation side wall 22 along the length of the extended hole 234. [ Herein, various known techniques are known, which are coupled to the back wall including a shape formed as a through hole in the coupling portion and fixed by a fixing pin.

5A, the fixing hole 233 and the first coupling hole 235 are fastened by the first fixing pin 237 and the extended hole 234 and the second coupling hole 236 are fastened to the second fixing pin 237. [ 238, the connection portions of the main body side wall 21 and the auxiliary rotation side wall 22 can be prevented from being detached or turned and folded by the first fixing pin and the second fixing pin, Can be formed at equal intervals.

5B, if only the first fixing pin 237 for fastening the fixing hole 233 to the first fixing hole 235 is removed and the second fixing pin 238 is maintained in the fastened state, The auxiliary turning side wall 22 can extend from the main body side wall 21 by the length of the through hole 234 and the auxiliary turning side wall 22 can be turned on the hinge axis of the second fixing pin 238.

When the auxiliary rotation side wall 22 is rotatably formed, as shown in FIG. 5C, the stole 10 can expand the area of the rear entrance / exit wall 40 of the inside area, have.

In the present invention, the coupling rod 231 is applied by means of the auxiliary rotation side wall 22 extending from the main body side wall 21, but the coupling rod 231 may be separately constructed as shown, Or the main sidewall 21 or the main sidewall itself may be formed with a fixed through-hole, an extended through-hole, a first coupling hole, a second coupling hole, Or may be provided in the form of a long elongated groove formed at the end portion thereof in order to facilitate the rotation and extension by applying various known methods.

When the main body side wall 21 and the auxiliary rotation side wall 21 are arranged in a line, the main body side wall 21 and the auxiliary rotation side wall 21 are further provided with shaft fixing means 201 The main body side wall 21 and the auxiliary rotation side wall 21 are firmly fixed together with the coupling means.

2B and 2C, the shaft fixing means 201 includes a shaft fixing pipe 202 integrally formed with either the main body side wall 21 and the auxiliary rotation side wall 22, And the shaft fixing projections 203 are integrally formed in the other one facing the fixed tube.

The shaft fixing pipe 202 and the shaft fixing protrusion 203 are located on the same horizontal line. One of them is provided on the auxiliary rotation side wall 22 and the other is provided on the main body side wall 21, The shaft fixing projections are inserted or released into the shaft fixing tube as they are spaced apart from or close to the main body side wall.

That is, when the auxiliary rotation side wall 22 is extended by the coupling means 23, the shaft fixing projections 203 inserted into the shaft fixing pipe 202 of the shaft fixing means 201 are separated from the shaft fixing pipe 202, The removed shaft fixing protrusion 203 is inserted again into the shaft fixing means 201 to connect the auxiliary rotation side wall 22 and the main body side wall 21. [

Therefore, the separated main body side wall 21 and the auxiliary rotation side wall 22 can be firmly coupled through the coupling means 23 and the shaft fixing means 201, Even when the load is applied, the load transmitted to the connection portion is dispersed to prevent breakage.

In general breeding grounds, the width of the access road should be wider than 900 mm to provide a turning radius to allow the pig to enter the stall area. However, the present invention is not limited to the case where the pig enters the auxiliary turning side wall 22 Direction, the entrance area of the stall into which the pig enters is enlarged as shown in the figure, so that even if the width of the entryway 60 is reduced to 650 mm, a sufficient turning radius is provided to enable entry of the pig. In addition, the rear entrance and exit wall 40 of the stall can be guided by removing the lock and rotating the opposite side entrance wall 60 to block the movement path of the pig.

6B, when the pig being raised in the inner region of the stall 10 is released from the stall, the pig is moved backward into the entrance road 60 by rotating the auxiliary turning side wall 22 in the opposite direction, Thereby allowing the user to escape to the outside.

The length of the extension hole 234 of the auxiliary rotation side wall 22 may be 0.1 to 0.3 times the length of the width between the two side walls, .

7A, if there is no extension function by the extended aperture, the turned auxiliary rotation side wall 221 is diagonally arranged with the fixed auxiliary rotation side wall 222 on the opposite side, and the end of the rotated auxiliary rotation side wall is fixed To the point spaced inwardly from the end of the secondary swivel side wall. This is because the fixed auxiliary rotating side wall 222 is not guided by the turned auxiliary rotating side wall 221, which is disposed diagonally on the end side, but the portion protruding by itself becomes larger. In this way, the single protruding part may be caught by the hitting of the pig with the pig in the process of entering or moving back into the stall, and the load may be concentrated on the latching part, resulting in breakage or deformation of the stall.

7B, in order to engage with the auxiliary rotating side wall 221 rotated close to the end side of the fixed auxiliary rotating side wall 222, the turned auxiliary rotating side wall 221 is rotated Guided and extended in length.

The rotation of the rotated auxiliary rotation sidewall 221 causes the connection of the fixed auxiliary rotation sidewall 222 to the ends of the rotated auxiliary rotation sidewall 221 and the fixed auxiliary sidewall 222, 7D, the brackets 27 may be overlapped with each other so that the brackets 27 are engaged with each other. Further, as shown in FIG. 7D, the extension brackets 29 are further provided on the inner support fins or the outer frame of the auxiliary rotation side wall in the width direction, The end bracket 27 of the auxiliary rotation side wall 221 is superimposed on the expansion bracket 29 provided on the fixed support side wall 222 and can be fastened with bolts or a locking bar.

As described above, when the pig enters or leaves the inside of the stall, the auxiliary swivel side wall, which is a part of the side wall constituting the stall, is expanded outwardly to expand the entrance of the stall so that the pig can be easily moved. It is useful to reduce the size of the low frequency access road by reducing the overall size of the breeding ground or by increasing the area of the stall by the width of the access road which is reduced.

10: Stall
20: side wall
21: main body side wall 22: auxiliary rotation side wall
23: engaging means 24,31: outer frame
25, 32: support piece 26: support leg
27, 33: end bracket 28:
29: Expansion bracket
201: shaft fixing means 202: shaft fixing pipe
203: shaft fixing projection
221: rotated auxiliary rotation side wall 222: fixed auxiliary rotation side wall
231: Coupling portion 232: Coupling portion
233: Fixed through hole 234: Extension hole
235: first coupling hole 236: second coupling hole
237: first fixing pin 238: second fixing pin
271: Vertical opening
30: Front wall
40: rear access wall
50:
60: Access road

Claims (7)

In a swan stall, which is installed in a pig farm and confines pigs,
A plurality of side walls (20) fixedly mounted on the bottom of the cage; A front wall (30) to which both sides of the inner region formed by adjacent two side walls are respectively coupled to ends of the two side walls in a forward direction in which feed is supplied; And a rear entrance and exit wall (40) which is openably and closably attached to the two side wall end portions in the direction opposite to the front wall to allow the pig to enter into the inside area or to exit into the entrance road,
The side wall 20 is divided into a main body side wall 21 coupled with the front wall and an auxiliary rotation side wall 22 coupled with the rear entrance and exit wall,
The auxiliary rotation side wall 22 is arranged so as to be in line with the side wall of the main body by the coupling means 23 or to rotate the coupling means on the hinge axis to expand the inlet side of the inside area,
The side wall (20), the front wall (30), and the rear entrance and exit wall (40) comprise outer frames (24, 31); And support pieces (25, 32) for supporting the inside of the outer frame vertically or horizontally,
The coupling between the side wall 20 and the members constituted by the front wall 30 and the rear entrance and exit wall 40 is achieved by disposing an end bracket 27.32 having vertical through holes in the outer frame portions on both sides, And the respective members are arranged such that the end brackets of the adjacent members are overlapped with each other to align the vertical through holes 271, and then the bolts or the engagement rods are inserted and joined together,
The coupling means (23)
And a coupling part (232) integrally coupled to the auxiliary rotation side wall is formed at one side of the rectangular plate, the coupling part (232) being formed integrally with the auxiliary rotation side wall, A coupling base 231 which is vertically perforated so as to form an elongated through hole 234 at the other end opposite to the engaging portion in the vicinity of the fixed hole;
First and second engaging holes 235 and 236 vertically perforated at predetermined intervals in the longitudinal direction on the upper and lower outer frames of the main body side wall;
And first and second fixing pins (237, 238) which are sequentially inserted into and engaged with the fixing hole or the hole of the coupling band and the first or second coupling hole. delete delete delete The method according to claim 1,
Wherein a length of the extension hole (234) of the auxiliary rotation side wall is 0.1 to 0.3 times the length of the width between the two side walls, and is extended at the time of rotation to be coupled to the end side of the opposite side auxiliary side wall. 6. The method of claim 5,
An extension bracket 29 is further provided on the support arm 25 in the end direction close to the rear entrance and exit wall so as to be overlapped with the end bracket coupled to the end of the adjoining auxiliary turn side wall rotated by the hinge Bolts or anchor rods. 6. The method of claim 5,
The separately formed main body side wall (21) and the auxiliary rotation side wall (22) form a shaft fixing means (201) on a wall surface close to each other,
The shaft fixing means 201 includes a shaft fixing pipe 202 integrally formed on either one of the main body side wall 21 and the auxiliary rotation side wall 22 and a shaft fixing pipe 202 integrally formed on the other side opposite to the shaft fixing pipe to be inserted into the shaft fixing pipe And a shaft fixing projection 203,
When the auxiliary turning side wall 22 is extended by the engaging means 23, the shaft fixing projections 203 of the shaft fixing means 201 are disengaged from the shaft fixing pipe 202 and the auxiliary turning side wall 22 The shaft fixing projections 203 of the shaft fixing means 201 are inserted into the shaft fixing pipe 202 to join the auxiliary rotation side wall 22 and the main body side wall 21. [

Images