JP2935158B2 - Spiral shoot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral chute for transporting an article such as a case containing mail items from a high place to a low place, and more particularly to a structure for smoothly sliding an article on a running rail. .

[0002]

2. Description of the Related Art Conventionally, as a device for transporting a case containing mail or the like, there is a spiral chute provided with an outer running rail and an inner running rail spirally provided from a high place to a low place. An outer guard rail and an inner guard rail are provided along the respective running rails near the outer running rail and the inner running rail, respectively. In such a spiral chute, the case is slid on each traveling rail while being guided by each guard rail,
Transport from high places to low places.

[0003]

However, in the conventional spiral chute described above, since the sliding portion of the case bottom with each traveling rail is almost constant, the case bottom is damaged and rutted. There is a problem that uneven wear occurs. Such uneven wear hinders smooth running of the case. The light case is
Since the centrifugal force acting during the sliding is small, there is a possibility that frictional resistance occurs due to contact with the inner guard rail, and there is a possibility of stagnation on the running rail during the sliding. Furthermore, since the case is slid by the action of gravity, there is a problem that the difference in weight of the case causes a great difference in the sliding speed. In addition, the case may derail from the outer running rail during the run, and once derailed, there is a problem that the case cannot be restored without manual operation or the like. In particular, when the derailment point was at a high place, workability was extremely poor, and a great deal of labor and time was required for restoration.

[0004] An object of the present invention is to provide a spiral chute capable of smoothly sliding an article on a running rail.

[0005]

The above object of the present invention is achieved by the following constitution. (1) an outer running rail (26) and an inner running rail (27) spirally provided from a high place to a low place;
Guard rails (23, 24, 25) provided near outer and inner running rails (26, 27), and the article (10) is guided by the guard rails (23, 24, 25) while the outer And inner running rails (26, 2)
7) In the spiral chute which slides on the upper part and conveys it from a high place to a low place, the outer running rail (26) is divided into predetermined sections (A, B), and each section (A, B)
The center of curvature of the rail is different for each B), and the distance between the outer running rail (26) and the inner running rail (27) in each section (A, B) is in the sliding direction (G) of the article. Spiral shoots that are arranged so that they spread gradually.

[0006] (2) and heights from toward the low place outside the running rail provided spirally (26) and an inner running rail (27), said outer and inner running rail (26, 27)
Guard rails (23, 24, 25) provided near
And the article (10) is attached to the guardrail (23,
24, 25) while guiding the outer and inner running rails.
In the spiral chute which slides on the rails (26, 27) and is conveyed from a high place to a low place, the outer running rail (26) has substantially the same vertical relative position as the inner running rail (27). A spiral chute that is arranged so as to continuously change between a state in which a predetermined amount is different from a state in which the predetermined amount is different from a predetermined state.

(3) An outer running rail (26) and an inner running rail (27) spirally provided from a high place to a low place, and the outer and inner running rails (26, 27).
Guard rails (23, 24, 25) provided near
And the article (10) is attached to the guardrail (23,
24, 25) and the traveling rail (26, 25).
27) In a spiral chute that slides on the top and is conveyed from a high place to a low place, the outer running rail (26) is divided into predetermined sections (A, B) and each section (A, B) The center of curvature of the rail is different, and the outer running rail (26) in each section (A, B) is:
The space between the inner running rail (27) and the inner running rail (27) is gradually widened in the sliding direction (G) of the article, and the relative position in the vertical direction with the inner running rail (27) is substantially the same. A spiral shoot characterized by being arranged so as to continuously change between quantitatively different states.

(4) At the connecting portion between the sections (A, B) of the outer running rail (26), the rear end of the rail in the section (B) on the front side in the sliding direction (G) of the article (10); The rail front end of the section (A) on the rear side in the direction is arranged so as to overlap by a predetermined amount (L) along the sliding direction with the relative positions in the vertical direction substantially aligned, and the section on the front side in the sliding direction. the rail rear end of (B), the serial to above, wherein the inclined surface to be lowered state at the time of installation directed obliquely upward along the sliding direction (34) is formed (1) or (3)
Spiral chute of the mounting.

[0009]

According to the configuration (1), the article slides on the outer and inner running rails while being guided by the guard rail. At this time, the article is given a change in the sliding direction of the article by gradually increasing the interval between the outer running rail and the inner running rail in the sliding direction of the article for each section. Thereby, the article is changed in the sliding position with each running rail to prevent uneven wear, and for example, a light article bulges outward in the sliding direction along the outer running rail, so that the guard rail near the inner running rail. The vehicle slides without contacting the vehicle, preventing stagnation during the run.

According to the configuration (2), the article is slid on the outer and inner running rails while being guided by the guard rail. Due to a change in the relative position of the outer running rail and the inner running rail in the vertical direction, the posture of the article being slid is continuously changed between a state inclined inward in the sliding direction and a horizontal state. The direction is given a lateral movement. Thereby, the sliding position of the article with each traveling rail is changed, and uneven wear is prevented. Also, for example, a light article swells outward in the sliding direction by a reaction when changing from a posture inclined inward in the sliding direction to a horizontal posture,
The vehicle slides without contacting the guard rail near the inner running rail, and the running speed is maintained to prevent stagnation during the run. On the other hand, for example, a heavy article slides so as to bulge outward in the sliding direction due to a reaction when changing from a position inclined inward in the sliding direction to a horizontal position, and is strongly contacted by a guard rail near the outer running rail, resulting in a large frictional resistance. And the running speed is reduced. Thereby, the difference in the sliding speed due to the difference in the weight of the articles is greatly reduced.

According to the above configuration (3), the article is slid on the outer and inner running rails while being guided by the guard rail. At this time, the article is given a change in the sliding direction of the article by gradually increasing the interval between the outer running rail and the inner running rail in the sliding direction of the article for each section. In addition, the article is continuously changed in its posture between a state inclined inward in the sliding direction and a horizontal state by a change in the relative position of the outer running rail and the inner running rail in the vertical direction, and the side in the sliding direction of the article. Given the movement towards.
Thereby, the sliding position of the article with each traveling rail is changed, and uneven wear is prevented. Also, for example, for light articles, the distance between the outer running rail and the inner running rail gradually increases in the sliding direction of the article for each section, and also due to the recoil when changing from the attitude inclined inward in the sliding direction to the horizontal attitude. As a result, the vehicle slides so as to bulge outward in the sliding direction without contacting the guard rail near the inner running rail, keeping the sliding speed and preventing stagnation during the sliding. On the other hand, for example, a heavy article slides so as to bulge outward in the sliding direction due to a reaction when changing from a position inclined inward in the sliding direction to a horizontal position, and is strongly contacted by a guard rail near the outer running rail, resulting in a large frictional resistance. And the running speed is reduced. Thereby, the difference in the sliding speed due to the difference in the weight of the articles is greatly reduced.

According to the above configuration (4), the article can be connected to the section of the outer running rail from the rear end of the section on the front side in the sliding direction of the article to the rail in the section on the rear side in the sliding direction. Glide smoothly to the front end without derailing. In addition, for example, an article derailed inward from the outer running rail during the sliding is guided on a slope formed at the rear end of the rail in the section on the front side in the sliding direction, and is returned to the outer running rail.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing a spiral chute according to one embodiment of the present invention. In this figure, a case 1 as an article carried into the uppermost entrance-side straight chute 11 is shown.
0 is conveyed to the outlet side direct chute 12 by the inlet spiral chute 20, the intermediate spiral chute 21 and the outlet spiral chute 22, and is carried out from the outlet side direct chute 12 by the wheel conveyor 13. It should be noted that the case 10 accommodates mails and the like (not shown).

The inlet-side straight chute 11 is provided continuously at the upper end of the inlet spiral chute 20, and slides the case 10 on the linear running rail 14 to be conveyed to the inlet spiral chute 20. The outlet-side straight chute 12 is provided continuously so as to connect the outlet spiral chute 22 and the wheel conveyor 13, slides the case 10 on the linear traveling rail 15, and moves the case 10 from the outlet spiral chute 22 to the wheel conveyor. 13. Wheel conveyor 13
The case 10 is continuously provided at the lower end of the outlet side direct chute 12, and the case 10 is unloaded from the outlet side direct chute 12 by sliding down on a number of wheels 17 rotatably supported by the conveyor frame 16. Let it.

The inlet, intermediate and outlet spiral chutes 20, 21 and 22 are gravity-type spiral chutes for transporting the case 10 by using gravity, and the case 10 is connected to the upper guard rail 23 and the outer guard rail. 24 and the inner guardrail 25,
It slides on the outer running rail 26 and the inner running rail 27, and rotates around the support 28 from the entrance-side straight chute 11 (in the present embodiment, one rotation at the entrance spiral chute 20 and the exit spiral chute 22 each, the intermediate spiral). (2 rotations on the chute 21 for a total of 4 rotations)
Then, it is lowered to the exit side direct chute 12.

In each of the spiral chutes 20, 21, 22 as shown in FIGS.
6 and the inner running rail 27 are provided spirally so as to make one turn around the support 28 from the high place to the low place (two turns in the intermediate spiral chute 21), and the reinforcing member 29 and It is fixed to the support 31 via the L-shaped bracket 30. As shown in FIG. 3, the support 31 is provided at four positions of the support 28 at every 90 ° in the horizontal direction.
Each is provided horizontally.

Referring again to FIGS. 1 and 2, the outer guard rail 24 and the inner guard rail 25 are provided on both sides of the outer running rail 26 and the inner running rail 27 in the sliding direction (the direction of arrow G), respectively. It is spirally provided along, and is supported by the support 31 via the bracket 32. The upper guard rail 23 is provided spirally along the outer running rail 26 slightly above the outer guard rail 24 and is supported by the support 31 via the bracket 32 and the upper guard rail support 33.

As shown in FIG. 3, the outer running rail 26 is provided with two sections 180 degrees horizontally around the column 28, that is, the uppermost part (the lower part in FIG. 3) at a horizontal angle of 0 °.
Is divided into two sections, a section having a horizontal angle of 0 ° to 180 ° (hereinafter, section A) and a section having a horizontal angle of 180 ° to 360 ° (0 °) (hereinafter, section B). The outer traveling rail 26 has a center of curvature of the rail shifted by a predetermined amount in each of the sections A and B. The outer traveling rail 26 in each of the sections A and B has a distance from the inner traveling rail 27 in the sliding direction G. So that the inner running rail 27
Are arranged so as to continuously change between a state where the relative positions in the vertical direction with respect to the state substantially coincide with each other and a state where the relative positions differ by a predetermined amount.

That is, the relative height positions of the outer running rail 26 and the inner running rail 27 are determined by the horizontal angles 90 ° and 27 °.
It is almost coincident at the position of 0 ° (FIG. 5),
The difference is a predetermined amount at the positions of the horizontal angles of 0 ° and 180 ° (FIG. 4), and is continuously changed at the intermediate position between them. That is, from the position at a horizontal angle of 0 ° at which the outer running rail 26 is at a position higher than the inner running rail 27 by a predetermined amount (FIG. 4), the deviation amount of the relative position in the vertical direction of each running rail 26, 27 is determined in the sliding direction G. Gradually decreases toward
The running rails 26 and 27 are substantially aligned at a position at a horizontal angle of 90 °, and are at substantially the same height (FIG. 5). On the contrary, from the position at the horizontal angle of 90 °, the deviation gradually increases in the sliding direction G. At the position at the horizontal angle of 180 °, the position where the outer running rail 26 is again higher than the inner running rail 27 by a predetermined amount (FIG. 4). Becomes From the position at the horizontal angle of 180 °, the shift amount gradually decreases again in the sliding direction G, and is substantially the same at the position at the horizontal angle of 270 °, so that the running rails 26 and 27 are at substantially the same height position (FIG. 5). ). From the position at the horizontal angle of 270 °, the shift amount gradually increases in the sliding direction G, and at the position at the horizontal angle of 360 ° (0 °), the outer running rail 26 is again higher than the inner running rail 27 by a predetermined amount (FIG. 4).

As shown in FIGS. 6 and 7, the connecting portion between the sections A and B of the outer running rail 26 is the rail (lower side in FIG. 6) of the section B (FIG. 3) in front of the sliding direction G. The rear end and the rail (FIG. 6) in section A (FIG. 3) on the rear side in the sliding direction G
The front end portion (middle upper side) is arranged so as to overlap by a predetermined amount L along the sliding direction G in a state where the relative positions in the vertical direction are substantially matched. At the rear end of the rail in section B, there is formed an inclined surface 34 that extends obliquely upward along the sliding direction G, and even if the case 10 derails from the outer travel rail 26 due to a collision between the cases 10, the derailment occurs. The case 10 is guided by the inclined surface 34 and returned to the outer running rail 26 again. In this embodiment, the outer running rail 26 is divided in units of 180 °, but the outer running rail 26 may be divided in a section having a center angle of less than 180 ° or more than 180 °.

The operation of this embodiment will be described. 1 and 2
, The case 10 is carried into the uppermost inlet-side direct chute 11, from which the inlet spiral chute 20 and the intermediate spiral chute 21 are moved.
The air is conveyed to the outlet side direct chute 12 by the outlet spiral chute 22, and is carried out from the outlet side direct chute 12 by the wheel conveyor 13.

In each of the inlet, intermediate and outlet spiral chutes 20, 21, and 22, the case 10 is guided by the upper guard rail 23, the outer guard rail 24 and the inner guard rail 25, and the outer running rail 26 and the inner running rail 27. While being slid on the top, it is rotated around the column 28 (one rotation in the entrance spiral chute 20 and the exit spiral chute 22, and two rotations in the intermediate spiral chute 21).

Referring to FIG. 3, the distance between the outer running rail 26 and the inner running rail 27 in each of the sections A and B gradually increases in the sliding direction G. Given the movement towards. Referring to FIGS. 4 and 5, the case 10 is tilted inward in the sliding direction G due to a change in the relative height of the running rails 26 and 27 (FIG. 4).
And a horizontal state (FIG. 5), and a movement in the sliding direction G side (the left-right direction in FIG. 4) is given.
As a result, the case 10 is mounted on each running rail 2 at the bottom.
The sliding position between the bearings 6 and 27 is changed to prevent uneven wear.

In the case where the stored mail is light, the case 10 during the sliding is such that the distance between the running rails 26 and 27 gradually increases in the sliding direction G, and the case 10 is inclined from the position inclined inside the sliding direction G. Due to the recoil at the time of changing to the horizontal posture, the vehicle slides without contacting the inner guardrail 25 so as to be greatly expanded outward in the sliding direction G, maintains the sliding speed, and prevents stagnation during the sliding. On the other hand, when the stored mail or the like is heavy, the sliding case 10 slides so as to greatly expand outward in the sliding direction G due to the recoil when changing from the position inclined inward in the sliding direction G to the horizontal position, Strong contact with the outer guard rail 24 causes a large frictional resistance, thereby reducing the sliding speed. Thereby, the difference in the sliding speed due to the difference in the weight of the case 10 is greatly reduced.

Referring to FIGS. 6 and 7, the case 10 sliding on the connecting portion between the sections A and B of the outer running rail 26 is provided with the rear end of the outer running rail 26 of the section B and the section A.
The front end of the outer running rail 26 is arranged so as to overlap by a predetermined amount L along the sliding direction G in a state where the relative height positions are substantially matched, so that the outer running rail 26 slides smoothly without derailment. . Moreover, the case 10 derailed from the outer running rail 26 is guided to ride on the inclined surface 34 formed at the rear end of the outer running rail 26 in the section B, and is returned to the outer running rail 26. The inclination angle θ of the inclined surface 34 with respect to the horizontal direction may be 0 ° or more.

As described above, according to the above-described embodiment, in each of the spiral chutes 20, 21, and 22, the outer traveling rail 26 is provided with a section A having a horizontal angle of 0 ° to 180 ° and a section A having a horizontal angle of 180 ° to 360 °. The section B is divided into two sections, and the center of curvature of the rail is shifted by a predetermined amount for each section A, B.
Are arranged so that the distance from the inner running rail 27 gradually widens in the sliding direction G, so that the case 10 during sliding can be given a movement in the sliding direction G side, so that the case 10 Each running rail 26, 2 at the bottom
By changing the sliding position with the case 7, uneven wear of the bottom of the case 10 can be reliably prevented. Lighter case 10
However, contact with the inner guard rail 25 can be prevented, and the running speed can be maintained to prevent stagnation during the running.

The relative height positions of the outer running rail 26 and the inner running rail 27 are horizontal angles of 90 ° and 270 °.
At the horizontal angles of 0 ° and 180 °, and changes continuously at the intermediate position between them, so that the case 10 during the sliding moves in the sliding direction G sideways. Movement can be provided, so that each running rail 26, 2 at the bottom of the case 10
By changing the sliding position with the case 7, uneven wear of the bottom of the case 10 can be reliably prevented. Lighter case 10
However, contact with the inner guard rail 25 can be prevented, and the running speed can be maintained to prevent stagnation during the running. On the other hand, the heavy case 10 can make strong contact with the outer guard rail 24, and can reduce the sliding speed. Thereby, the difference in the sliding speed of the case 10 due to the weight difference can be reduced.

Further, each section A, B of the outer running rail 26
Are arranged such that the rear end of the rail in section B and the front end of the rail in section A overlap by a predetermined amount L along the sliding direction G with their vertical relative positions substantially aligned. So that each section A,
Also at the connection portion B, the case 10 can be slid smoothly without derailing from the outer running rail 26. Moreover, at the rear end of the rail in the section B, an inclined surface 34 is formed, which extends obliquely upward along the sliding direction G, so that the case 10 derailed from the outer traveling rail 26 is guided by the inclined surface 34 to the outside. It can be returned on the running rail 26.

In the above embodiment, each of the spiral chutes 20, 21, 22 is configured for clockwise rotation in which the case 10 slides clockwise in plan view, but the case 10 rotates counterclockwise in plan view. It may be configured to slide.

Each of the spiral shoots 20, 21, 22
When the inner guard rail 25 of FIG. 2 is formed in an elliptical shape in plan view, that is, an elliptical shape in which the diameter between the 0 ° position and the 180 ° position is larger than the diameter between the 90 ° position and the 270 ° position, However, even when the case 10 is inclined inward in the sliding direction G due to the difference in the relative height positions of the running rails 26 and 27, the contact with the inner guard rail 25 is more reliably prevented. Stagnation is more reliably prevented.

Further, if the material of the outer guard rail 24 is made to have a higher coefficient of friction than the material of the inner guard rail 25, even if the light case 10 comes into contact with the inner guard rail 25, the sliding can be performed without lowering the sliding speed. In addition, when the heavy case 10 comes into contact with the outer guard rail 24, the sliding speed of the heavy case 10 can be further reduced by generating greater frictional resistance with the outer guard rail 24. Thereby, the difference in the sliding speed due to the difference in the weight of the case 10 can be reduced more reliably.

[0032]

As described above, according to the present invention, the outer running rail is divided into predetermined sections, and the center of curvature of the rail is different for each section. Since the distance from the traveling rail is gradually increased in the sliding direction of the article, it is possible to prevent uneven wear of the article and also to prevent light articles from contacting the guard rail near the inner traveling rail, for example. Therefore, it is possible to reliably prevent the article from stagnating during the sliding, and to smoothly slide the article on the traveling rail.

Further, according to the present invention, the outer running rail is continuously changed between a state in which the relative positional relationship with the inner running rail in the vertical direction is substantially the same and a state in which the relative positional difference is different by a predetermined amount. Since it is arranged, uneven wear of the article can be reliably prevented. Further, for example, it is possible to prevent a light article from coming into contact with the guard rail near the inner running rail, and to cause a heavy article to strongly contact the guard rail near the outer running rail, for example, to generate a large frictional resistance. As a result, while the sliding speed of a light article can be maintained, the sliding speed of a heavy article can be reduced, and the difference in the sliding speed due to the weight difference of the articles can be greatly reduced. Therefore, the article can be slid smoothly on the traveling rail.

Further, according to the present invention, the outer running rail is divided into predetermined sections, the center of curvature of the rail is different for each section, and the outer running rail in each section is different from the inner running rail. Arranged so that the interval gradually widens in the sliding direction of the article, and changes continuously between a state in which the relative positional relationship with the inner running rail in the vertical direction is substantially the same and a state in which the relative position is different by a predetermined amount. Therefore, uneven wear of the article can be prevented. Also, for example, a light article can be prevented from contacting the guard rail near the inner running rail, and can be reliably prevented from stagnating during the slide, and, for example, a heavy article can be prevented from being guarded near the outer running rail. , And a large frictional resistance can be generated. As a result, while the sliding speed of a light article can be maintained, the sliding speed of a heavy article can be reduced, and the difference in the sliding speed due to the weight difference of the articles can be greatly reduced. Therefore, the article can be slid smoothly on the traveling rail.

Further, according to the present invention, in the connecting portion of each section of the outer running rail, the rail rear end of the section on the front side in the sliding direction of the article and the rail front end of the section on the rear side in the sliding direction are perpendicular to each other. Are arranged so as to overlap by a predetermined amount along the sliding direction in a state where the relative positions of the outer running rails are substantially coincident with each other. Can be skated. Moreover, at the rear end of the rail in the section on the front side in the sliding direction, there is formed an inclined surface directed obliquely upward along the sliding direction, so that, for example, articles derailed from the outer traveling rail during the sliding are guided to the inclined surface. Can be returned on the outer running rail.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a spiral shoot of the spiral shoot of FIG. 1;

FIG. 3 is a plan view of the spiral chute of FIG. 2;

FIG. 4 is a view of the spiral shoot of FIG.

FIG. 5 is a view of the spiral chute of FIG.

FIG. 6 is an enlarged plan view of a portion E of the spiral chute shown in FIG. 3;

FIG. 7 is a view of the spiral chute of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Case (article) 23 Upper guardrail 24 Outer guardrail 25 Inner guardrail 26 Outer running rail 27 Inner running rail A Predetermined section (horizontal angle of 0 ° to 180 °) B Predetermined section (horizontal angle of 180 ° to 360 °) Section) G Sliding direction

Claims (4)

(57) [Claims] An outer running rail (26) and an inner running rail (27) spirally provided from a high place to a low place.
When, a guardrail (23, 24, 25) provided in the vicinity of the outer and inner running rail (26, 27), the article (10), the guardrail (23,24,2
5) while guiding the outer and inner running rails (2).
6,27) In a spiral chute that slides on the top and is transported from a high place to a low place, the outer running rail (26) is divided into predetermined sections (A, B), and each section (A, B) The center of curvature of the rail is different for each section, and the distance between the outer running rail (26) and the inner running rail (27) in each section (A, B) gradually increases in the sliding direction (G) of the article. Spiral chute characterized by being arranged so that it may spread. 2. An outer running rail (26) and an inner running rail (27) spirally provided from a high place to a low place.
When, a guardrail (23, 24, 25) provided in the vicinity of the outer and inner running rail (26, 27), the article (10), the guardrail (23,24,2
5) while guiding the outer and inner running rails (2).
6, 27) In a spiral chute which slides on the upper part and conveys it from a high place to a low place, the outer running rail (26) is in a state where the relative position in the vertical direction with the inner running rail (27) is almost the same. A spiral chute arranged so as to continuously change between states differing by a predetermined amount. 3. An outer running rail (26) and an inner running rail (27) spirally provided from a high place to a low place.
And guardrails (23, 24, 25) provided near the outer and inner running rails (26, 27), and the article (10) is transferred to the guardrails (23, 24, 2).
5) A spiral chute that slides on the travel rails (26, 27) while being guided from 5 to 5 and conveys from a high place to a low place, wherein the outer travel rail (26) is divided into predetermined sections (A, B). In addition, the center of curvature of the rail is different for each section (A, B), and the outer running rail (26) in each section (A, B) is different from the inner running rail (2).
7) so that the distance between the inner running rail (27) and the inner running rail (27) is substantially different from each other by a predetermined amount so that the distance from the inner running rail (27) gradually increases in the sliding direction (G) of the article. A spiral chute characterized by being arranged so as to change continuously between them. 4. At a connection portion of each section (A, B) of the outer running rail (26), a rear end of a rail in a section (B) in a forward direction (G) of the article (10), and a sliding direction. The rail front end of the rear section (A) is arranged so as to overlap by a predetermined amount (L) along the sliding direction with the vertical relative positions substantially coincident with each other, and the front section of the sliding direction ( The spa according to claim 1 or 3, wherein an inclined surface (34) is formed at the rear end of the rail (B) obliquely upward along the sliding direction and is lowered when installed. /> Iral shoot.