JP2006304911A - Pachinko game machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize enlargement of a picture by expanding a display screen of a variable display device to be installed in a game part in front of a game board without obstructing the passing of hit balls for falling. <P>SOLUTION: A frame body 10 surrounding a display screen 6 of a variable display device 4 to be installed in a window 5 opened in the game board 1 is attached with a guide bridge 12 diagonally laid across corner parts 13a and 13b in the upper part of the frame body and crossing the front face of the display screen 6, and hit balls falling from the upper part of the display screen 6 are guided from the upper edge part 10a of the frame body 10 to the sides of the display screen 6 via the guide bridges 12 and released to hit ball passing areas 14a and 14b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pachinko gaming machine in which a display screen of a variable display device is installed at a front center portion of a game board.

Many pachinko machines have recently been proposed that have a display screen of a variable display device in the center of the front of the game board to produce game content through images and enhance the interest of the player. It has become.
The biggest feature of this game machine with a variable display device is that the progress of the game is expressed as a moving image according to a certain story through an image that appears on the display screen, and is displayed by the image. It will be more interesting to be able to predict the next development.

  For this reason, the player mainly looks at the display screen while watching the falling situation of the ball hitting the game board surface during the game, and tries to grasp the progress of the game through the image. There is a tendency. Therefore, the image has been devised such as adopting a character with high directing effect so that the player's interest is not killed, but in order to further enhance this effect, the image is enlarged and its operation Expansion is desired.

Although the enlargement of the image and the enlargement of the image operation can be achieved by increasing the size of the display screen, as is well known, the size of the game board is almost fixed, with some differences. Since the game part on the front side is also limited in size, it is impossible to arbitrarily increase the screen size.
The major factor that hinders the increase in the size of the screen is that the distance between the corners of the screen and the rails or decorative frames forming the game portion is narrowed, and the passing area of the hit ball falling through the side of the display screen is narrowed.

  The problem with the reduction of the passing area of the hit ball is not only that the hit ball that is thrown into the game part is prevented from falling smoothly, but also the natural movement of the hit ball is hindered and the change of the hit ball is lost. This hinders free guiding of the hitting ball to the winning opening provided on the side or lower side of the display screen, particularly to the starting winning opening related to the display image.

For this reason, a predetermined interval is secured between the rail and the display screen from the top through which the hit ball is passed, and the fact is that the display screen has been enlarged.
As a solution to this problem, a transparent protective cover is attached to the front of the display screen, a nail is implanted in the transparent protective cover, and the ball that falls along the front of the display screen is moved to the side of the display screen by the nail. The display screen can be enlarged by guiding it (for example, Patent Document 1), and the game board is made of a transparent synthetic resin so that nails can be struck on the entire surface of the game board. Thus, there is a method (for example, Patent Document 2) that enables the display screen of an arbitrary size to be installed by arranging a nail for guiding a hit ball on the front side of the display screen.

Also, instead of increasing the size of the display screen by enabling the placement of nails for guiding the hitting ball on the front portion of the display screen, the display screen is guided from the upper edge to the side edge. A hitting ball that forms a passage and jumps into an entrance formed at the upper edge is discharged from an outlet that opens to the lower end or the lower edge of the side edge through the passage, and is guided to a winning opening including a start winning opening. There are those (for example, Patent Documents 3 and 4).
JP-A-11-57122 JP 2000-84164 A Japanese Patent Laid-Open No. 2001-17685 Japanese Patent Laid-Open No. 11-19289

  Since the solutions disclosed in Patent Documents 1 and 2 enable a nail to be planted in front of the display screen of the variable display device, the display screen can be freely sized without considering the relationship with the rails. However, in Patent Document 1, it is necessary to install a special transparent protective cover, and in Patent Document 2, it is necessary to form the game board itself with a specific material. In general gaming machines formed as a material, this cannot be carried out as it is.

Further, the solution described in Patent Document 3 is such that the hit ball received at the world winning opening 19 is passed through a ball guide bar 20 provided by bypassing the side of the symbol display section 16 and the winning device 7 In the device described in Patent Document 4, a hit ball from the ball inlet 42 is passed through a warp passage 44 arranged so as to surround the display surface 62 and discharged from a lower ball outlet 48, and a starting prize is received. It leads to the mouth 16.
Therefore, if these means are adopted, the display screen can be expanded leaving a sufficient space between the display screen and the rail to allow the ball guide rod 20 and the warp passage 44 to pass through. Can be realized.

  However, in the case of the above-mentioned Patent Documents 3 and 4, the hit ball is only guided uniformly from a certain position to a certain position while moving from the upper part to the lower part of the display screen. During this time, there is no change in the hit ball, and the expectation and unexpectedness inherent in the pachinko gaming machine that freely falls on the game board surface is lost.

  Therefore, in view of the above-described conventional situation, the present invention provides freedom at the time of falling without requiring special conditions for the game board and without uniformly guiding the hit ball passing through the side of the display screen. An object is to propose a pachinko gaming machine that realizes an increase in the size of the display screen in a state where it can be guided toward a winning opening arranged on the side or lower side of the display screen.

As described above, the enlargement of the display screen of the variable display device is due to the fact that the display screen has a horizontally long rectangular shape, so that when the screen is expanded, the upper corners form a gaming portion in accordance with the expansion. It approaches the rail and narrows the passing area (space) of the hit ball that passes between them, and hinders the smooth flow of the hit ball.
In particular, the overhang of the upper corner of the display screen is an obstacle to securing an inclination angle for guiding the hit ball launched into the center sideward, and the fall route is specified by narrowing down by a narrow passage area. , The change of the hit ball immediately before the winning opening will be poor. The present invention solves these problems and enables the display screen to be enlarged.

  In order to solve the above problems, the present invention attaches a guide bridge across the front of this corner to the upper corner of the display screen that is enlarged, and is driven into the upper portion of the display screen and falls toward the front of the display screen. The hitting ball is caused to cross the front of the display screen through the guide bridge, and is guided to the passing area (space) that opens to the side of the display screen to be released.

  Since the display screen has a horizontally long rectangular shape as described above, the left and right upper corners approach the rail by increasing the size, but in this case, the side edges of the display screen are arranged in an arc shape. Since a sufficient area is secured between the rail and the hit ball, the hit ball released here is secured to move freely. This size allows the nail to be planted and allows the fall to change while giving freedom to guide the hit ball.

  Further in detail, in the pachinko gaming machine in which the display screen of the variable display device is installed in the center of the game unit on the front surface of the game board, the front edge of the frame surrounding the display screen is placed on the front surface of the game board. While aligning, pass a guide bridge that crosses the corner diagonally to the left and right corners of the upper part of the frame body, or one of the corners, and hit the ball from above the frame body through the guide bridge to the side of the frame body Another object of the present invention is to provide a pachinko gaming machine that is characterized by being stimulated and released.

  It is another object of the present invention to provide a pachinko gaming machine in which the guide bridge is formed integrally with a frame surrounding a display screen.

  Further, the present invention separately forms a frame body and a guide bridge surrounding the display screen, a mounting receiving portion at the corner of the frame body, and a mounting locking portion at the end of the guide bridge, respectively. An object of the present invention is to provide a pachinko gaming machine characterized in that the guide bridge is mounted and assembled to a corner portion of the frame body by forming and engaging the mounting locking portion with the mounting receiving portion.

  Another object of the present invention is to provide a pachinko gaming machine in which the guide bridge is formed with a guide recess along the length direction at the center of the upper surface.

  It is another object of the present invention to provide a pachinko gaming machine characterized in that the guide bridge has a fall-preventing wall erected along the length direction at the rear edge.

  Another object of the present invention is to provide a pachinko gaming machine characterized in that the guide bridge is formed of a transparent material.

  Further, according to the present invention, the guide bridge spans the upper left and right corners of the upper and left corners of the frame surrounding the display screen and surrounds the upper edge of the display screen by connecting the upper end side ends. It is an object of the present invention to provide a pachinko gaming machine characterized in that the ball is distributed and guided to the left or right of the display screen.

  It is another object of the present invention to provide a pachinko gaming machine characterized in that the left and right guide bridges across the upper left and right corners are continuously connected by inserting a distribution convex member between upper end side ends.

In the present invention, the frame surrounding the display screen may be integral with the casing main body that accommodates the display screen, or may be formed separately, and the front edge portion thereof is a game. What is necessary is just to be installed in alignment with the front of a board.
The reason for aligning the front edge of the frame to the front of the game board is that the guide bridge that crosses the corner protrudes from the front edge and receives a hit ball that falls along the front of the game board. This is due to the positional relationship required from being able to guide from the top to the side.

  Therefore, the front edge portion of the frame body here is based on the front edge portion at the left and right upper corners of the frame body to which the guide bridge is attached, and the center portion of the upper frame portion of the frame body, the left and right side frames The part, and further the lower frame part, may have a structure in which each front edge protrudes from the front surface of the game board.

  In addition, the frame body decorates the peripheral portion of the display screen facing from behind the window established on the game board, and substantially covers the cut on the inner peripheral surface of the window, It is formed with a depth that matches the thickness of the game board. And it is desirable to provide a flange for preventing the opening edge of the window from being exposed outwardly on the outer periphery of the front edge.

  According to the present invention configured as described above, a large display screen is temporarily installed in the center of the game part formed by the enclosure of the rails on the front surface of the game board, and the left and right upper corners of the display screen are the above-mentioned Displayed even when approaching the inner circumference of the rail, the interval between the corner and the rail is narrowed and the passing area of the hit ball is narrowed, making it difficult to pass or the route of hitting the ball is specified The ball hitting the upper part of the screen is not sent from the upper edge of the display screen to the upper left and right corners, but through a guide bridge that runs diagonally across the upper corner, a wide space on the side of the display screen Since it is released directly into the flow, the flow does not stagnate, and the released hit ball can freely move left and right within this wide space (passage area), so the route of the fall can also be specified Will be avoided.

By the way, a part of the screen is covered with a guide bridge across the upper corner. However, by reducing the thickness of the guide bridge or by using a transparent synthetic resin material, It is possible to minimize visual occlusion.
Further, since this guide bridge is crossed diagonally across the corner, the screen at the corner is exposed, and continuity with the most exposed surface at the center of the screen is ensured. As a result, although a part of the screen is covered by the passing of the guide bridge, it does not hinder the realization of the expanded screen.

  In the present invention, as described above, the guide bridge is passed to the left and right corners of the upper part of the display screen, and depending on the design of the frame surrounding the display screen, the ball is displayed on the display screen depending on the design of the entire game board. In the case of a configuration in which only one side is allowed to pass, a guide bridge is naturally installed only at one corner.

  In addition, when this synthetic bridge is molded into a synthetic resin material in accordance with the frame of the display screen, both of them may be integrally molded in advance as one piece, or may be molded and combined separately. Each will be selected in consideration of design and formability.

 Even if it becomes difficult to secure a sufficient hitting ball passage area (space) between the upper corner of the display screen and the rail that surrounds the game portion due to the increase in the size of the display screen due to the above configuration. Since the ball can be released to the side of the wide open display screen through a guide bridge that passes diagonally across the corner, the restriction that previously prevented the approach to the rail and prevented the display screen from becoming large was removed. Will be. Therefore, as a result, according to the present invention, it has become possible to install and assemble a display screen that is larger than before.

  Next, the embodiments of the present invention will be described based on Examples 1 to 3 shown in the drawings, the features will be described in detail, and other features will be described together.

1 to 5 show a first embodiment of a pachinko gaming machine according to the present invention. FIG. 1 is a front view of a game board, FIG. 2 is a plan view of FIG. 1, and FIG. FIG. 4 is an enlarged perspective view of a main part, and FIG. 5 is an exploded perspective view of FIG.
In the drawings, reference numeral 1 denotes a game board that is freely attached to a pachinko gaming machine and 2 is a rail that is provided along the peripheral edge of the front surface of the game board 1 and surrounds the game section 3. Is a variable display device facing the window 5 established in the center of the game unit 3 of the game board from the back side, 6 is its display screen, and 7 is a start prize for starting the variable display device. 8 is a large winning opening provided below the starting winning opening, and 9 is an out ball opening established at the lowermost end of the gaming section 3.

The rail 2 guides a hit ball from a not-shown hit ball launching device to the game unit 3 surrounded by the rail 2 through the hit ball guiding unit 2a on the left side, and the hit ball hit on the game unit 3 has its uppermost position. The drop starts from above and falls above the display screen 6.
Although not shown in FIG. 1, a large number of nails that change the direction of the hit ball are planted above the display screen 6, including obstacle nails called so-called ceiling nails. The hit ball falls while being divided by these nails to the left and right and falls toward the upper edge of the eyelid display screen 6 as it is.

The display screen 6 can be viewed from behind the window 5 established in the game board 1 and can be viewed through the protective transparent plate 6a from the front side of the game board.
The display screen 6 has a cylindrical frame 10 formed in a rectangular shape surrounding the screen, and the frame is fitted to the inner periphery of the window 5 so as to cover the inner peripheral wall surface cut by router processing. It is.

  The frame body 10 is separate from the variable display device 4 here, and has a flange 11 protruding outward along the outer peripheral surface at the front edge portion, and from the front side to the window 5 of the game board. When fitted, the flange 11 is brought into contact with the front surface of the game board 1 so as to be flush with each other, covers the opening edge of the window 5, and the rear edge projects to the back side of the game board 1 to display the display screen 6. It surrounds the surroundings.

In the figure, 12 is a guide bridge that crosses the left and right corners 13a and 13b in the upper part diagonally across the upper and lower side frames 10b and 10c from the upper frame 10a of the frame 10.
The guide bridge 12 is configured to pass a hit ball falling toward the upper frame portion 10a of the frame body 10 of the display screen 6 on the outside of the left and right side frame portions 10b and 10c of the frame body 10, that is, a hit ball passing area provided on both sides ( Space) 14a and 14b for guiding the transfer. In this case, the guide means is formed separately from the frame body 10 and is assembled using locking claws 15 which are mounting locking portions.

  As shown in the figure, the guide bridge 12 has a top portion 16 as a distribution convex member that forms a convex solitary surface at the center, and left and right bridge portions that similarly form a convex solitary surface from both sides. 12a and 12b are extended to form a circular arc as a whole, and the top 16 and the left and right bridges 12a and 12b both receive a pachinko ball and can flow left and right along the top surface. It is formed with.

As shown in FIG. 5, the guide bridge 12 is provided with a locking claw 15 so as to protrude rearward from the rear edges of the both ends of the left and right bridge portions 12 a and 12 b, and on the flange 11 of the frame body 10. It corresponds to each of the slit-like locking holes 17 which are mounting receiving portions to be bored.
Therefore, when the guide bridge 12 is pressed from the front side of the frame body 10 and the locking claws 15 are inserted into the respective locking holes 17 and locked, the both are united together as shown in FIG. From the upper frame portion 10a to the left and right side frame portions 10b and 10c, the left and right bridge portions 12a and 12b cross diagonally across the left and right upper corner portions 13a and 13b of the frame body.

In the figure, reference numeral 18 denotes a second bridge for guidance that crosses the left and right corners 13c and 13d at the lower part of the frame 10 diagonally.
The second bridge 18 forms a route for guiding the hit ball passing through the passing areas 14a and 14b to the start winning opening 7 provided immediately below the center of the display screen 6, and guides the hit ball. A striking ball can be guided directly from the passage areas 14a and 14b toward the start winning opening 7 across the front surface of the display screen 6 where a nail row cannot be formed.

  The second bridge 18 projects rearwardly a locking claw 19 similar to the locking claw 15 formed on the guide bridge 12 at each end, and the locking claw 19 is also formed on the flange 11 of the frame body 10. It can be attached to the front surface of the flange 11 by engaging with the slit-like locking hole 20 to be established.

  As described above, the frame body 10 configured as described above is fitted into the window 5 of the game board 1 from the front side and brought into contact with the flange 11, and then screwed into the hole of the mounting ear piece 21 formed on the flange 11. It will be fixed by passing through 22 and screwing into the screw receiving hole 23 on the front of the game board.

In the figure, 24 is a nail planted in the passage areas 14a and 14b, 25 is a windmill, and these are provided to guide the hit ball that has entered the passage areas 14a and 14b to the start winning opening 7, The tip of the head faces the second bridge 18.
Therefore, the hit ball guided to the second bridge 18 by being guided by the nail 24 and the windmill 25 crosses the lower corner portion 13c (or 13d) of the frame body 10 according to the inclination of the bridge, and It rolls in the direction of the center of the lower frame portion 10d and faces the start winning opening 7.

  The lower frame portion 10d of the frame body 10 constitutes a stage 26, which accepts a hit ball that has fallen rearward while colliding with the nail 24 and the windmill 25, or on the way to the second bridge 18. The concave curved surface portion is rolled and guided to the start winning opening 7 while reciprocating left and right.

  Since the pachinko gaming machine according to the present invention is configured as described above, a hit ball that has been driven into the game unit 3 falls as it is and reaches the upper frame portion 10a of the display screen 6, and then is conventionally displayed. It is guided toward the gap between the upper left and right corners of the screen 6 and the rail 2, and is sent to a winning opening such as a starting winning opening 7 installed below the passing space formed by the gap. However, according to the present invention, the hit ball that reaches the upper frame portion 10a of the display screen 6 crosses the guide bridge 12 facing the upper frame portion, crosses the upper corner portion 13a (or 13b), and forwards the display screen 6. Will pass toward the side frame portion 10b (or 10c), and will be discharged to the passing area 14a (or 14b) where the distance between the side frame portion and the rail 2 is widened. It will be sent out to the mouth.

In this way, according to the present invention, the ball hitting the guide bridge 12 without passing through the narrow space between the corners 13a and 13b of the display screen and the rail 2, wide space from the side of the display screen 6 downward. Therefore, it is possible to enlarge the display screen 6 without being aware that the corners 13a and 13b approach the inner periphery of the rail 2.
In other words, the display screen is enlarged until the upper corners 13a and 13b are substantially in contact with the inner periphery of the rail 2 because the hit ball can be discharged through the guide bridge 12 as described above. It is possible to achieve an increase in size.

  In the present invention, even if the upper corners 13a and 13b approach the rail 2 with an increase in the size of the display screen 6, the space between the left and right bridges 12a and 12b and the rail 2 is sufficiently large. Since the passing areas 14a and 14b can be secured, it is possible to drop and guide the hit ball at a suitable angle toward obstacle facilities such as the nail 24 and the windmill 25 provided on the passing areas 14a and 14b. Therefore, there is an advantage that the passage route is not specified, and the change of the fall can be fully enjoyed.

6 and 7 show a second embodiment of the present invention. In this embodiment, the guide bridge 12 is formed separately from the frame 10 of the display screen 6 in the first embodiment, whereas the frame 10 is formed integrally when the synthetic resin material is formed, In this example, only the top 16 that is structurally complicated is formed separately and then assembled.
The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. Hereinafter, the same applies to other examples.

  In this embodiment, the second bridges 18 and 18 passed to the lower left and right corners 13c and 13d are also formed integrally with the frame body 10, but the top portion 16 of the frame body 10 is shown as shown in the figure. It is assumed that they are assembled together by being fitted between both end portions of the bridge portions 12a and 12b crossing over the upper corner portions 13a and 13b. In this case, the ends of the bridge portions 12a and 12b are fitted into the notches 28 formed at both ends of the top portion 16 so as to be integrated with the left and right bridge portions and extend upward from the flange 11. A mounting boss 30 protruding from the rear surface is brought into contact with the mounting piece 29 and screwed with a screw 31 so as to be assembled together.

As described above, one of the reasons for forming the top 16 separately is that the integral molding with the frame 10 is structurally very troublesome. As another reason, the top 16 is formed on the display screen 6. Since it occupies an important position in decorating the edges, it is possible to change the combination by preparing multiple tops with different shapes and making it easy to change the display screen design through this change There is to do.
Therefore, although not shown in the drawing, the top 16 is different from the top 16 having a substantially semicircular arc surface shape. For example, a roof-shaped top having a downward slope on the left and right is formed and rearranged to form an arc. It is possible to easily make decorations that are completely different from the ones.

  The guide bridge 12 in this embodiment also operates in exactly the same manner as in the first embodiment, and the hit ball falling from the upper part of the display screen 6 is distributed to the left and right with the top portion 16 as a boundary, and either the left or right bridge portion 12a, 12b, and is guided from the upper frame portion 10a of the frame body 10 to the left and right side frame portions 10b or 10c through the bridge portion and discharged to the passing regions 14a and 14b opened as wide spaces on both sides. Will be.

8 to 10 show a third embodiment of the present invention. This embodiment is an example in which fall prevention walls 32 and 32 for preventing the hitting ball from falling backward are provided at the rear edge portions of the left and right bridge portions 12a and 12b of the guide bridge 12 along the length direction.
The fall prevention wall 32 blocks the left and right corners of the upper part of the frame body 10 and thus prevents exposure in this portion of the screen 6. However, the lower frame portion crosses the front surface of the display screen from a high position. It is not preferable for the hit ball to fall on the stage 26, and there is a risk of noise generation and breakage.

In addition, as a means for preventing the hit ball rolling on the guide bridge from falling in the front-rear direction, a groove serving as a guide recess is formed in the length direction, that is, in the left-right direction on the upper surface of the left and right bridge portions 12a and 12b including the top portion 16, It may be guided along the groove. In this case, although the thickness of the bridge portions 12a and 12b is increased, the coverage ratio of the corner portion is smaller than that in the case where the fall prevention wall 32 is erected, and the ratio of losing a sense of wideness of the screen is reduced. .

  As described above, the embodiments of the present invention have been described based on the respective examples. However, the guide bridge 12 may be formed of a transparent synthetic resin to ensure visibility at the corners. In the case where the guidance is limited to one side of the display screen, it is not necessary to form a bridge with respect to the other corner, so the bridge 12a (or 12b) of the guidance bridge 12 is attached only to the corner on one side. You can pass it.

The front view of the game board which shows a use condition. The top view of FIG. The top view made into the cross section along the AA line of FIG. The enlarged perspective view of the principal part. The expansion disassembled perspective view of the principal part. The expansion perspective view of the principal part in the 2nd example. FIG. 7 is an exploded perspective view of FIG. 6. The front view of the game board explaining the use condition in a 3rd Example. The expansion perspective view of the principal part of FIG. It is an expansion perspective view of the guide bridge in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Game board 2 Rail 3 Game part 4 Variable display apparatus 5 Window 6 Display screen 7 Start winning opening 8 Large winning opening 10 Frame surrounding display screen 10a Upper frame of frame
10b, 10c Side frame portion of frame 10d Lower frame portion of frame 11 Flange formed along the front edge of frame 12 Guide bridge 12a, 12b Left and right bridge portions of guide bridge 13a, 13b Upper left and right sides of frame Corners 13c and 13d Lower left and right corners 14a and 14b of the frame 16 Passing area 16 of the hitting ball 16 Top part which is a distribution convex member formed at the center of the guide bridge 18 Second bridge passed to the lower corner of the frame 24 Nail 25 Windmill 32 Fall prevention wall

Claims (8)

In a pachinko gaming machine in which a display screen of a variable display device is installed in the center of the game part on the front of the game board,
While aligning the front edge of the frame surrounding the display screen with the front surface of the game board, a guide bridge is formed at the upper left and right corners of the frame, or at any one of the corners, diagonally across the corner. A pachinko gaming machine characterized in that the hit ball from above the frame body is guided and released to the side of the frame body through the guide bridge.   2. The pachinko gaming machine according to claim 1, wherein the guide bridge is formed integrally with a frame surrounding the display screen.   The frame body and the guide bridge surrounding the display screen are individually formed according to claim 1, and a mounting receiving portion is provided at a corner portion of the frame body, and a mounting locking portion is provided at an end portion of the guide bridge. A pachinko gaming machine characterized in that the guide bridge is mounted and assembled to a corner portion of the frame body by forming and engaging the mounting locking portion with the mounting receiving portion.   4. The pachinko gaming machine according to claim 1, wherein the guide bridge forms a guide recess along a length direction in a central portion of the upper surface.   4. The pachinko gaming machine according to claim 1, wherein the guide bridge has a fall-preventing wall erected along a length direction at a rear edge portion.   6. The pachinko gaming machine according to claim 1, wherein the guide bridge is made of a transparent material.   2. The guide bridge according to claim 1, wherein the guide bridge surrounds the upper edge of the display screen by continuously connecting the upper end side ends of the guide bridge across the upper left and right corners of the frame surrounding the display screen. A pachinko gaming machine characterized in that the ball hitting the ball is distributed and guided to either the left or right of the display screen.   8. The pachinko gaming machine according to claim 7, wherein the left and right guide bridges extending over the left and right corners of the upper part are inserted continuously between the upper end side end parts and are continuously integrated.

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