JP2011051388A - Fixing device of seat for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing device of a seat for a vehicle capable of preventing unintentional displacement of a lock lever in relation to a device body block. <P>SOLUTION: This fixing device 10 includes the device body block 11 fixed to a vehicle body and the lock levers 12 for regulating slipping-out of a locking tool on a seat side inserted into the device body block 11. The lock levers 12 include first projection parts 33a, and the device body block 11 includes first regulation hole parts 23a engageable to the first projection parts 33a. The first projection parts 33a and the first regulation hole parts 23a are engaged to each other when the lock levers 12 are located at the lock position. The unintentional displacement of the lock levers 12 is prevented by the engagement of the first projection parts 33a and the first regulation hole parts 23a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fixing device for fixing a vehicle seat to a floor of a vehicle body.

  As a fixing device for fixing the vehicle seat to the floor of the vehicle body, a substantially U-shaped locking tool protruding from the vehicle seat is inserted into the device body block fixed to the mounting hole on the floor, and the device body There is known one that regulates the withdrawal of the locking tool from the lock lever by a lock lever (for example, see Patent Document 1).

The fixing device described in Patent Literature 1 is provided with a cylinder portion for inserting a locking tool and a guide hole intersecting the cylindrical portion in the apparatus main body block, and prevents the locking tool of the vehicle seat from coming off. A lock lever is fitted in the guide hole so as to be slidable. The lock lever is provided with a plate spring, and the plate spring biases the entire lock lever in the insertion direction (lock position direction) in a state where the lock lever is assembled to the apparatus body block.
When the vehicle seat is attached to the floor, the device body block is fixed to the attachment hole on the floor in a state where the lock lever is assembled to the device body block in advance, and the vehicle seat locking device is fixed in that state. Then, the lock lever is retracted against the urging force of the leaf spring and pushed into the cylinder portion of the apparatus body block. When the locking tool is completely pushed into the cylindrical portion in this way, the tip of the lock lever is inserted into the substantially U-shaped frame of the locking tool, and the locking lever is prevented from coming off. .

JP-A-5-294176 Japanese Patent Laid-Open No. 7-17307

  However, in the case of this conventional fixing device, although the lock lever is urged in the lock position direction by the leaf spring, the guide hole of the device main body block can be slid freely. If the engagement of the leaf spring of the fixing device is lost or dropped due to some cause in the fixed state, the lock lever may be displaced in the guide hole in an unintended situation.

  Therefore, the present invention is intended to provide a vehicle seat fixing device capable of preventing unintentional displacement of a lock lever with respect to a device body block.

The invention according to claim 1, which solves the above-described problem, is a substantially U-shaped locking tool (which is attached to a vehicle body and protrudes from a vehicle seat (for example, a vehicle seat 2 in an embodiment described later)). For example, an apparatus main body block (for example, an apparatus main body block 11 in an embodiment to be described later) into which the locking tool 4) in the embodiment described later is inserted and the insertion direction of the locking tool intersect the device body block. The distal end portion is inserted into the substantially U-shaped frame portion of the locking device inside the device main body block so that the locking device can be removed from the device main body block. In a vehicle seat fixing device comprising a lock lever that regulates (for example, a lock lever 12 in an embodiment described later), the lock is provided between the device body block and the lock lever. When the bar is in a lock position that restricts the locking tool from being pulled out, the first protrusions that engage with each other and restrict the sliding displacement in the pulling direction of the lock lever (for example, a first protrusion in an embodiment described later) A protrusion 33a) and a first recess (for example, a first restricting hole 23a in an embodiment described later) are provided.
Thus, when the lock lever restricts the removal of the vehicle seat locking tool at the lock position, the first protrusion engages with the first recess so that the slide displacement of the lock lever is restricted. Become.

According to a second aspect of the present invention, in the vehicle seat fixing device according to the first aspect, the first protrusion portion is a flexible arm portion that extends along the slide displacement direction of the lock lever ( For example, it is provided in the arm part 34) in an embodiment described later.
Thereby, for example, the locking member of the vehicle seat can be removed from the apparatus main body block by removing the first protrusion from the first recess by bending the arm and pulling the lock lever in the unlocking direction. .

  According to a third aspect of the present invention, in the vehicle seat fixing device according to the first or second aspect, the lock lever allows the locking tool to be removed between the device main body block and the lock lever. When in the release position, a second protrusion (for example, a second protrusion 33b in an embodiment described later) and a second recess (for example, a second protrusion that engage with each other and restrict displacement of the lock lever in the further withdrawal direction) A second restricting hole 23b)) in an embodiment described later is provided, and the first recess and the second recess are formed continuously.

According to a fourth aspect of the present invention, in the vehicle seat fixing device according to any one of the first to third aspects, the lock lever includes a slit (for example, described later) along the slide displacement direction of the lock lever. A pair of bending pieces (for example, a bending piece 41 in the embodiment described later) separated by the slit 40 in the embodiment of the present invention is provided, and either one of the first protrusion and the first recess is provided on both the bending pieces. It is provided.
As a result, the first protrusion and the first recess are disengaged by pulling the lock lever in a state where both the bending pieces are bent in the slit direction.

  According to the first aspect of the present invention, when the lock lever is in the lock position, the first protrusion and the first recess are engaged with each other, and the sliding displacement in the lock lever withdrawal direction is restricted. Unintentional displacement of the lock lever with respect to the apparatus body block can be reliably prevented.

  According to the second aspect of the present invention, since the first protrusion is provided on the flexible arm extending along the slide displacement direction of the lock lever, the lock lever is unlocked. Can be easily displaced to the release position by simply removing the first protrusion from the first recess by bending the arm and pulling the lock lever.

  According to the third aspect of the present invention, since the first concave portion and the second concave portion are formed continuously, the concave portion forming area can be reduced and the rigidity of the apparatus main body block and the lock lever can be maintained high.

  According to the fourth aspect of the present invention, the first projection and the second projection can be easily disengaged by pulling the pair of flexure pieces of the lock lever while being bent in the slit direction. Therefore, the unlocking operability of the lock lever can be improved.

It is a perspective view for explaining attachment of a vehicular seat. It is a perspective view of the apparatus main body block of the fixing device of 1st Embodiment of this invention. It is a perspective view of the lock lever of the fixing device of 1st Embodiment of this invention. It is a side view of the fixing device of a 1st embodiment of this invention. It is a top view of the fixing device of a 1st embodiment of this invention. 1 is a perspective view of a fixing device according to a first embodiment of the present invention. It is a top view of the lock lever of the fixing device of the 2nd Embodiment of this invention. It is a top view of the apparatus main body block of the fixing device of 2nd Embodiment of this invention. It is a perspective view of the fixing device of 2nd Embodiment of this invention. It is a top view of the lock lever of the fixing device of the 3rd Embodiment of this invention. It is a top view of the apparatus main body block of the fixing device of 3rd Embodiment of this invention. It is a top view of the lock lever of the fixing device of 4th Embodiment of this invention. It is a top view of the apparatus main body block of the fixing device of 4th Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In each embodiment described below, the same parts are denoted by the same reference numerals, and redundant descriptions are omitted. In the following description, up and down and front and rear means up and down and front and rear in a state of being attached to the vehicle body unless otherwise specified. Further, in the figure, arrow F indicates the front, R indicates the rear, U indicates the upper side, and D indicates the lower side.

  FIG. 1 is a diagram showing a floor 1 in a vehicle interior and a vehicle seat 2 (hereinafter referred to as “seat 2”) fixedly installed on the floor 1. As shown in the figure, a plurality of substantially rectangular attachment holes 3 for attaching the sheet 2 are provided on the floor 1. On the other hand, a locking tool 4 made of a substantially U-shaped metal pipe projects from a position corresponding to the mounting hole 3 on the lower surface near the front end of the seat 2.

2 to 6 show the fixing device 10 according to the first embodiment for fixing the sheet 2 to the mounting hole 3, and FIG. 2 is made of resin fixed to the mounting hole 3 on the floor 1. FIG. 3 shows a resin lock lever 12 that prevents the locking member 4 of the sheet 2 inserted into the apparatus body block 11 from coming off. 4 to 6 show a state in which the apparatus main body block 11 and the lock lever 12 are assembled.
As shown in FIG. 2, the apparatus body block 11 is formed in a substantially rectangular parallelepiped shape that is long in the vertical direction and the width direction, and an insertion portion in which the lower half region is inserted into the mounting hole 3 of the floor 1. The upper region is a lever engaging portion that is engaged with the lock lever 12 outside the attachment hole 3.

  The insertion portion of the apparatus main body block 11 has a substantially rectangular horizontal cross section substantially matching the cross section of the mounting hole 3, and wedge-shaped clips projecting forward and backward on the upper edge portions of the front and rear walls, respectively. The claw 13 is integrally formed. Although a detailed illustration is omitted here, a substantially U-shaped notch is provided on the top and both sides of the clip claw 13, and the clip claw 13 is attached to the attachment hole 3 when the insertion part is inserted into the attachment hole 3. It is elastically deformed inward by being pressed by the edge portion of the lens, and returns to its shape when it passes through the mounting hole 3.

  The lever engaging portion of the apparatus main body block 11 is provided with an upper flange 14 and a lower flange 15 projecting to the outer peripheral area, and spaced apart by a set distance. Between the upper flange 14 and the lower flange 15, a guide groove 17 having a substantially U-shaped cross section for guiding a guide projection 16 of a spring portion 27 of the lock lever 12 described later is provided. Further, the lower flange 15 is bent downward on both sides, and the edge contacts the edge of the mounting hole 3 on the floor 1, thereby restricting the downward displacement of the apparatus body block 11. ing. That is, the apparatus main body block 11 is fixed on the floor 1 by sandwiching the edge of the mounting hole 3 from above and below by the lower flange 15 and the clip claw 13.

  Further, the apparatus body block 11 is formed with a receiving hole 18 in which the upper surface side is opened in a long hole shape and the locking member 4 of the sheet 2 is inserted from above. The receiving hole 18 is formed along the vertical direction so as to extend from the lever engaging portion to the insertion portion. A front edge bulging portion 19 having a substantially square shape in a top view is integrally formed at the center of the front portion of the lever engaging portion of the apparatus main body block 11. The leading edge bulging portion 19 bulges forward of the upper flange 14 and the lower flange 15.

  The apparatus main body block 11 is provided with a guide hole 20 having a substantially rectangular cross section that extends substantially horizontally from the front edge bulging portion 19 side toward the front side and intersects the receiving hole 18 at a substantially right angle. The guide hole 20 passes through the rear wall of the apparatus main body block 11 after intersecting the receiving hole 18 from the front edge bulging portion 19 side, but on the upper surface facing the guide hole 20 on the rear wall side, A stopper projection 21 (see FIGS. 4 and 6) is provided so as to restrict the entry of the distal end portion of the lock lever 12, which will be described later.

  Further, a locking groove 22 into which a guide projection 16 of the lock lever 12 described later is fitted is formed at a portion of the rear edge of the upper flange 14 that is spaced apart from the left and right. Further, the upper surface of the apparatus main body block 11 including the upper flange 14 is formed in a taper shape so as to be recessed in a mortar shape toward the upper opening of the receiving hole 18.

  The front edge bulging portion 19 of the apparatus main body block 11 is formed with a displacement restricting hole 23 having a convex cross section penetrating in the vertical direction. The displacement restricting hole 23 includes a second restricting hole 23b (second recess) formed in a rectangular shape long in the front-rear direction at the center in the width direction, and both side portions near the rear portion of the second restricting hole 23b. The first restriction hole portion 23a (second concave portion) formed in a square shape adjacent to each other, and these are continuous so as to form a convex shape in cross section.

  On the other hand, as shown in FIG. 3, the lock lever 12 is slidably inserted into the guide hole 20 of the apparatus main body block 11, and a rod portion 24 that restricts the locking member 4 inserted into the receiving hole 18 from coming off. The base portion 25 is integrally formed on the base end side of the rod portion 24 and supports the rod portion 24. The base portion 25 is integrally formed on the left and right sides of the base portion 25, and is gripped by the operator when operating the lock lever 12. And a pair of spring portions 27 formed at the front end portions on both sides of the base portion 25 so as to protrude forward so that the distal end side is curved toward the rod portion 24 side.

  The rod portion 24 is formed in a substantially rectangular cross section like the guide hole 20, and a tapered surface 28 that is inclined downward toward the tip portion is formed on the top surface of the tip portion. Further, a locking recess 29 is formed on the distal end surface of the rod portion 24 so as to be fitted to the stopper projection 21 on the apparatus body block 11 side when the rod portion 24 crosses the receiving hole 18 and reaches a predetermined locking position. Has been. Further, on the top surface of the rod portion 24 on the base portion side, a projection portion 30 for preventing backlash is integrally formed. The protrusion 30 is formed integrally with the tip of an arm 31 that extends along the extending direction of the rod 24, and is elastic with the upper wall of the guide hole 20 when the rod 24 is inserted into the guide hole 20. The occurrence of backlash is suppressed by contact.

The base portion 25 is provided with a substantially rectangular notch hole 32 penetrating in the vertical direction, and a pair of first protrusions 33a and one second protrusion 33b are provided so as to face the notch hole 32. Is provided. The pair of first projecting portions 33a are spaced apart in the width direction, and the second projecting portion 33b is disposed between the pair of first projecting portions 33a.
The first protrusions 33a on both the left and right sides are integrated with the tip of the arm part 34 that linearly extends rearward from the front end side of the base part 25 (extends along the sliding displacement direction of the lock lever 12). It is formed and protrudes upward in an arc shape with respect to the upper surface of the arm portion 34. The arm portion 34 can be bent and deformed in the vertical direction. The second projecting portion 33b is provided at the center in the width direction on the rear end side of the base portion 25, is formed with a tapered surface 35 that protrudes obliquely upward toward the front side, and the end surface on the front side is vertical. It is formed flat along the direction.

  The pair of first projecting portions 33 a is configured so that the rod portion 24 of the lock lever 12 is inserted into the guide hole 20 of the device main body block 11 and the tip portion is in a locked position where it abuts against the stopper projection 21. Of the displacement restricting holes 23, the first restricting hole portions 23a on both sides are inserted and engaged from below.

  Further, when the lock lever 12 is assembled to the apparatus main body block 11 in advance, the second protrusion 33b is located on the front side of the central second restriction hole 23b among the displacement restriction holes 23 of the apparatus main body block 11. It is inserted into and engaged with the restriction hole 23b from below. Note that the tip of the lock lever 12 enters the receiving hole 18 of the apparatus main body block 11 at a position where the second protrusion 33 thus passes over the edge on the front side and is inserted into the second restriction hole 23b. It is set to be in the unlock position. Once the second protrusion 33b is inserted into the second restriction hole 23b, the second protrusion 33b can freely move inside the second restriction hole 23b along with the sliding displacement of the lock lever 12, but the lock lever 12 When attempting to move backward beyond the specified amount, the end surface of the second protrusion 33 abuts against the end of the second specified hole 23b to restrict the displacement. Thereby, the lock lever 12 is prevented from falling off from the apparatus body block 11.

  Further, when the rod portion 24 of the lock lever 12 is inserted into the guide hole 20 of the apparatus main body block 11, the spring portion 27 slides the guide protrusion 16 on the distal end side along the guide groove 17 and finally guides The upper end portion of the protrusion 16 is fitted into the locking groove 22 of the upper flange 14. Thereby, the front end side of both spring parts 27 is fixed to the apparatus main body block 11, and the urging | biasing force of both spring parts 27 acts so that the lock lever 12 may be held in a locked position. However, even when the lock lever 12 is in the locked position, the bending allowance is secured between the spring portions 27 and the guide groove 17, so that when a large backward force is applied to the lock lever 12, the lock lever 12 is locked. The lever 12 moves backward by a predetermined amount against the force of the spring portion 27.

  In the above configuration, when the seat 2 is fixed on the floor 1 of the vehicle body using the fixing device 10, the lock lever 12 is assembled to the device body block 11 in advance, and the lower half of the device body block 11 in that state. Is inserted into the mounting hole 3 on the floor 1, and the apparatus main body block 11 is fixed on the floor 1 by being sandwiched between the clip claw 13 and the lower flange 15. At this time, the lock lever 12 receives the urging force of the spring portion 27 and is positioned at the lock position.

  Next, the locking member 4 of the sheet 2 is pushed into the receiving hole 18 of the apparatus main body block 11 from this state. Thus, when the locking tool 4 is pushed, the lower end of the locking tool 4 comes into contact with the tapered surface 28 formed on the upper surface of the rod portion 24 of the lock lever 12, and the lock lever 12 is retracted via the tapered surface 28. Press and move in the direction. At this time, the first protrusion 33a of the lock lever 12 engaged with the first restriction hole 23a at the lock position is temporarily disengaged from the first restriction hole 23a. Thus, when the lock lever 12 moves backward by a predetermined amount, an insertion gap for the locking tool 4 is secured in the receiving hole 18, and the locking tool 4 is inserted into the receiving hole 18. Thus, when the locking tool 4 is inserted into the receiving hole 18, the tip of the rod portion 24 faces the inside of the frame portion of the substantially U-shaped locking tool 4, and the rod portion 24 is connected to the spring portion 27. The urging force is received to enter the frame portion of the locking tool 4. Thereby, the front-end | tip part of the rod part 24 comes to prevent the latching tool 4 from detaching, and the seat 2 is fixed to the floor 1. At this time, the first protrusion 33a is again engaged with the first restricting hole 23a.

  In the fixing device 10 for the seat 2 used here, when the lock lever 12 is in the lock position, the first protrusion 33a on the lock lever 12 side engages with the first restriction hole 23a on the device body block 11 side. Therefore, even if the spring 27 of the fixing device 10 is disengaged or dropped due to any cause, the sliding displacement of the lock lever 12 in the pulling direction can be reliably controlled. .

  In the case of the fixing device 10, the first protrusion 33 a of the lock lever 12 is integrally formed at the distal end of the flexible arm portion 34, so that the first protrusion 33 a and the first restriction hole portion are formed. The lock lever 12 can be easily moved to the release position by releasing the engagement with the lock 23a and pulling the lock arm 12 in the backward direction by holding the grip portion 26. Therefore, in the fixing device 10, the seat 2 can be easily removed.

  Furthermore, in the fixing device 10 of this embodiment, since the first restriction hole 23a and the second restriction hole 23b for preventing the lock lever 12 from falling off are formed continuously, the lock lever 12 It is possible to reduce the weakened area due to the hole formation above and maintain the rigidity of the lock lever 12 high.

  In the case of the first embodiment described above, the first protrusion 33a is provided symmetrically on the lock lever 12 side, and the first restricting hole 23a that engages with this is similarly provided on the apparatus body block 11 side. The first protrusion 133a and the second protrusion 133b are provided on the lock lever 12 one by one as in the fixing device 110 of the second embodiment shown in FIGS. To cope with this, one first restriction hole 123a and one second restriction hole 123b may be provided on the apparatus body block 11 side.

Next, the fixing device 210 according to the third embodiment shown in FIGS. 10 and 11 will be described.
As shown in FIG. 10, the lock lever 212 is provided with a continuous slit 40 from the front end side of the base portion 225 to a part of the rod portion 224 so as to follow the slide displacement direction of the lock lever 212. The slit 40 is formed so as to penetrate the base portion 225 and the rod portion 224 in the vertical direction, and both edges of the lock lever 212 separated from each other by the slit 40 are bent with the base portion side of the slit 40 as a fulcrum A pair of bending pieces 41 that allow deformation is provided.

In addition, a substantially triangular first protrusion 233a is formed on the outer side surface (the outer surface of the bending piece 41) on both sides of the rod portion 224 corresponding to the base portion position of the slit 40 so as to protrude sideways. Yes.
Further, on the top surface of the rod portion 224 on the base portion side, a projection portion 30 and a second projection portion 233b for preventing backlash are formed.

  On the other hand, on the side walls on both sides of the guide hole 20 of the apparatus main body block 211, when the lock lever 212 is inserted to the lock position, the first protrusion 233a of the lock lever 212 is engaged with a substantially triangular shape. A groove 42 (first recess) is formed. Further, the front edge bulging portion 19 of the apparatus main body block 211 is formed with a rectangular displacement restriction hole 43 (second concave portion) with which the second protrusion 233b on the lock lever 212 side is engaged.

  In the case of the fixing device 210 according to this embodiment, the lock lever 212 is provided with a pair of bending pieces 41 separated by the slit 40 on the left and right sides, the first protrusion 233a is provided on the outer surface of the bending piece 41, and the device Since the locking grooves 42 that can be engaged with the first protrusions 233a are provided on the side walls on both sides of the guide hole 20 of the main body block 211, the gripping portion 26 is gripped and the flexure piece 41 is bent and locked. By pulling the lever 212, the engagement between the first protrusion 233a and the locking groove 42 can be easily released. For this reason, the same effects as those of the first embodiment can be obtained, and there is an advantage that when the seat 2 is removed, the lock by the lock lever 212 can be released more easily.

12 and 13 show a fixing device 310 according to the fourth embodiment.
In the case of this fixing device 310, the lock lever 312 is provided with a slit 40 from the base portion 225 to a part of the rod portion 224, as in the third embodiment. The pair of bending pieces 41 is provided, but the substantially triangular first protrusion 333 a is provided not on the outer side surface of each bending piece 41 but on the upper surface side of each bending piece 41. The first protrusion 333a is provided such that the triangular top protrudes outward in the width direction.

  On the other hand, a rectangular displacement restriction hole 43 that is long in the front-rear direction is formed in the front edge bulging portion 19 of the apparatus main body block 311 in the center in the width direction, and the second protrusion on the lock lever 312 side is formed in the displacement restriction hole 43. The part 233b is inserted and engaged. In addition, recessed portions 45 (first recesses) are formed in the side edge portions on both sides of the displacement restricting hole 43, respectively. When the lock lever 312 is inserted into the apparatus main body block 311 to the lock position, the recess 45 is adapted to engage the first protrusion 333a on the lock lever 312 side.

  Also in the case of the fixing device 210, as in the third embodiment, the first protrusion 333a and the recess are formed by pulling the lock lever 312 while holding the holding portion 26 and bending the bending piece 41. The engagement with 45 can be easily removed.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary. For example, in each of the above embodiments, the first protrusion and the second protrusion are formed on the lock lever side, and the first recess and the second recess are formed on the apparatus body block side. Alternatively, the first and second protrusions may be formed on the apparatus body block side, and the first and second recesses may be formed on the lock lever side. In each of the above-described embodiments, the holes (the first restriction hole portion 23a, the second restriction hole portion 23b, and the like) that penetrate the first recess and the second recess are configured. The shape is not limited, and may be a hollow shape.

DESCRIPTION OF SYMBOLS 2 ... Vehicle seat 4 ... Locking tool 10,110,210,310 ... Fixing device 11 ... Device main body block 12 ... Lock lever 23a, 123a ... 1st control hole (1st recessed part)
23b, 123b ... second restriction hole (second recess)
33a, 133a, 233a, 333a ... 1st projection part 33b, 133b, 233b ... 2nd projection part 40 ... Slit 41 ... Deflection piece 42 ... Locking groove (1st recessed part)
43 ... Displacement restricting hole (second recess)

Claims (4)

An apparatus body block that is attached to the vehicle body and into which a substantially U-shaped locking tool protruding from the vehicle seat is inserted;
The device body block is assembled so as to be slidable in a direction intersecting with the insertion direction of the locking tool, and the tip is inserted into the substantially U-shaped frame portion of the locking tool inside the device body block. In a vehicle seat fixing device, comprising: a lock lever that regulates removal of the locking tool from the device body block.
When the lock lever is in a lock position for restricting the locking tool from being pulled out between the apparatus main body block and the lock lever, they are engaged with each other to regulate the sliding displacement in the pulling direction of the lock lever. 1. A vehicular seat fixing device, comprising: a projection and a first recess.   2. The vehicle seat fixing device according to claim 1, wherein the first projecting portion is provided on a flexible arm portion extending along a slide displacement direction of the lock lever. 3.   When the lock lever is in an unlocked position that allows the locking tool to be removed between the device main body block and the lock lever, they are engaged with each other to restrict further displacement of the lock lever in the removal direction. 3. The vehicle seat fixing device according to claim 1, wherein a second protrusion and a second recess are provided, and the first recess and the second recess are continuously formed. 4.   The lock lever is provided with a pair of flexure pieces separated by a slit along the slide displacement direction of the lock lever, and one of the first protrusion and the first recess is provided on both the flexure pieces. The vehicle seat fixing device according to any one of claims 1 to 3, wherein the vehicle seat fixing device is provided.

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