JP4472133B2 - Seat belt tightening device and child seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat belt tightening device for securely tightening a child seat and fixing the child seat stably and securely when the child seat is fixed on the seat of the vehicle using the seat belt. It relates to the child seat provided.
[0002]
[Prior art]
When an infant is put on a car, a child seat is used for the safety of the infant. An example of the child seat will be described with reference to FIGS.
As shown in FIG. 5, a child seat CS includes a child seat main portion 50 in which a seat back A and a seat cushion B are integrated to accommodate an infant, and a child seat base portion that couples the child seat main portion 50 so as to be integrated or reclining. 51. A seat pad 52 is erected in the center of the front portion of the seat cushion B, and a buckle 55 is provided above it. Shoulder belts 54, 54 pulled out from the back side of the seat back A through the shoulder belt through holes 53, 53, and seat belts 54 ', 54' fixed to the seat cushion B are attached to the abdomen member 52 by attachment / detachment brackets 56, 56, respectively. It is detachably fixed to the buckle 55.
[0003]
As shown in FIG. 6, the shoulder belt 54 is fixed to one end of a plate-like belt adjustment fitting 57 on the back side of the seat back A, and the length adjustment belt pulled out from the retractor to the other end of the belt adjustment fitting 57. 58 is fixed. The retractor is built in the lower part of the seat back A, and the length adjusting belt 58 is pulled out from the pull-out port 59.
The shoulder belt through-holes 53, 53 are provided in pairs in the vertical direction (three pairs in the figure), and the use position of the shoulder belt through-hole 53 is shifted upward as the child grows. I try to hold my shoulders.
A headrest 60 (FIG. 5) for fixing the infant's head is attached to the upper portion of the seat back A so as to be adjustable in the vertical direction. Head supports 60a and 60a are fixed to both ends of the headrest 60 so that the infant's head does not wobble in the left-right direction.
[0004]
When such a child seat CS is fixed to a car seat, the child seat base 51 is placed on the car seat, and the child seat base 51 is fixed by the vehicle seat belt 61. There are various ways of fixing, but one method is as follows. Since the tongue 23 is attached to the seat belt 61, when the tongue 23 is pulled, the shoulder side belt 61S is pulled out from the retractor of the vehicle (here, the vehicle seat belt positioned on the shoulder side with the tongue 23 as a boundary). Is referred to as the “shoulder side belt 61S” and the vehicle seat belt portion located on the waist side belt side is referred to as “waist side belt 61W”). Is pulled out to the opposite side through the recess 511 of the child seat base 51, and then the tongue 23 is engaged with the buckle 25 attached to the other end of the floor fixing seat belt 24 having one end fixed to the seat or floor. Thus, the child seat CS is seated by the vehicle seat belt 61. It is fixed to. Thereafter, the shoulder belt 61S is pulled back to the vehicle retractor side, so that the vehicle seat belt 61 is not loosened, and the child seat CS is fixed to the vehicle seat.
In this manner, after the child seat base 51 of the child seat CS is fixed to the vehicle seat by the vehicle seat belt 61, the infant is seated on the seat cushion B of the child seat main portion 50. Then, by pulling out the shoulder belts 54, 54 from the rear of the infant and engaging and fixing the attaching / detaching brackets 56, 56 to the buckle 55 of the abdomen member 52, the infant can seat the seat cushion by the abdomen member 52, the shoulder belt 54, etc. It is pressed onto B so that it cannot come out. Therefore, even when the automobile suddenly stops, it is possible to prevent an accident such as an infant hitting the front seat.
[0005]
[Problems to be solved by the invention]
However, since the vehicle seat belt may become loose during driving due to the shaking of the automobile, the overlapping portion of the shoulder side belt and the waist side belt of the vehicle seat belt has been conventionally fixed using a clip or the like. However, the conventional fixing using the clip is complicated, and the tightening operation lacks simplicity.
[0006]
An object of the present invention is to provide a tightening device for a seat belt that can easily maintain a strong tightening state when a child seat is fixed on a vehicle seat using a vehicle seat belt, and a child seat including the same. It is in.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a seat belt tightening device according to claim 1 is a seat belt tightening device for tightening a seat belt used when a child seat is fixed on a vehicle seat. A tightening base having a recess recessed in the middle portion, a standing member provided with an extending portion extending from the tightening base and extending above the recess, and supported by the extending portion And a moving member that is movable toward the recess, and a pressing plate provided at the tip of the moving member.
According to a second aspect of the present invention, in the seat belt tightening device according to the first aspect, the moving member is constituted by an adjusting screw in which the screw portion and the operation portion are integrated, and the screw hole into which the screw portion is screwed. Is formed in the extended portion.
[0008]
According to the seat belt tightening device having the above configuration, the tightening base is formed with a recess for pushing the belt, and the adjustment screw provided at one end of the tightening base is rotatable. Since the pressing plate that pushes the belt into the recess is provided, the belt is stretched over the recess and the adjustment screw is turned to press the belt portion that is spanned on the pressing plate against the pressing plate. Then, the belt is pushed into the recess, and the tension of the belt is increased according to the amount of pushing at this time, and tightening is performed.
[0009]
The child seat according to claim 3 is a child seat having the child seat base portion and a child seat main portion reclinably mounted on the child seat base portion. The main part of the child seat is integrally attached to the vicinity of the central part of the part, a long guide groove is formed in the reclining direction of the main part of the child seat at the central part of the guide plate, a support member is inserted into the guide groove, One of the support members is fixed to the child seat base, and a seat belt tightening device can be attached to the other of the support members.
The invention according to claim 4 is the child seat for the seat belt tightening device according to claim 3, wherein the tightening base of the seat belt tightening device according to claim 1 or 2 is fixed to the other of the support members. Features.
According to a fifth aspect of the present invention, in the child seat according to the fourth aspect, the guide plate has a storage portion that stores the seat belt tightening device.
[0010]
According to the child seat having the above-described configuration, even if the child seat is a reclining type, the seat belt tightening device according to the first or second aspect can be disposed at an easy-to-use position.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A seat belt tightening device according to the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a configuration of a seat belt tightening device according to the present invention, and shows a state before tightening. FIG. 2 is a front view showing the seat belt tightening device in the tightened state.
The configuration of the tightening device 1 according to the present invention can be broadly classified as shown in FIGS. 1 and 2, and the tightening base 3 in which a concave portion 2 having a high end and a concave recess is formed in the central portion, An L-shaped standing member 4 that has a flat plate portion 4 a that is an extended portion that stands up from the side surface of the fastening base 3 and extends above the concave portion 2, and a flat plate portion 4 a of the standing member 4 is formed. An adjustment screw 6 (moving member) that is screwed into the screw hole 5 and rotated, and is fixed to the tip of the screw portion of the adjustment screw 6 and can be pushed up and down by the rotation operation and pushed into the recess 2. A pressing plate 7 and the like are provided. The adjusting screw 6 is a pressing plate that is integrally formed with a screw portion 6a and a disk-like operation portion 6b, and is freely attached to the lower end of the screw portion 6a by rotating the disk-like operation portion 6b. 7 is moved up and down. That is, when the operating portion 6b is rotated in the direction of arrow A in FIG. 1, for example, the pressing plate 7 enters the recess 2, and conversely, when the operating portion 6b is rotated in the direction of arrow B, the pressing plate 7 is removed from the recess 2. It is designed to escape upward.
In FIG. 1, the lateral width W of the tightening base 3 is set to be slightly larger than the lateral width of the seat belt 61, and the length L may be appropriately selected according to the width and structure of the child seat CS.
[0012]
Next, how to use the seat belt tightening device according to the present invention will be described.
First, the operating portion 6b is rotated in the direction of arrow B to pull up the pressing plate 7, and a sufficiently wide gap is formed between the upper surface of the tightening base 3 and the pressing plate 7, and from the front of the tightening device 1. The seat belt 61 is easily inserted between the upper surface of the tightening base 3 and the pressing plate 7 (see FIG. 1). After the seat belt 61 is inserted into the gap between the upper surface of the tightening base 3 and the pressing plate 7, the operating portion 6 b is rotated in the direction of arrow A to lower the pressing plate 7. As a result, as shown in FIG. 2, the seat belt 61 is pushed into the recess 2 by the pressing plate 7, and the seat belt 61 is tightened according to the pushing amount.
In FIG. 2, an imaginary line is drawn so that the seat belt 61 is pushed in until it comes into contact with the bottom surface of the recess 2, but this is an example, and the tension of the seat belt 61 is actually shown. If sufficient, pushing may be stopped halfway.
As described above, after adjusting the tension of the seat belt 61, when the rotation of the adjusting screw 6 is stopped, the screw portion 6b is screwed into the screw hole 5, so that the adjusting screw 6 rotates in the reverse direction. There is no, and the tightening state is securely maintained.
[0013]
Next, the attachment structure to the child seat CS of the tightening device 1 which is the 2nd Embodiment of this invention is demonstrated.
3 and 4 are perspective views of the child seat in which the seat belt tightening device according to the first embodiment of the present invention is devised according to the second embodiment and arranged on the child seat. FIG. 4 is a perspective view of the child seat with the door closed, and FIG. 4 is a perspective view of the child seat with the door 17 of FIG. 3 opened as seen from a direction different from FIG. As can be seen from FIG. 4, the tightening device 1 is attached to the central portion of the child seat base 12. That is, a guide plate 13 is provided below the tightening device 1 as shown in FIGS. 1 to 3, and the guide plate 13 is provided integrally with the seat portion 11 and can be reclined. It comes to work together. Therefore, an elongate guide groove 14 is provided substantially in the center of the guide plate 13 along the arrow CD direction, that is, the reclining direction of the seat portion 11, and the support member 15 (FIG. 2) is inserted into the guide groove 14. One end of the support member 15 is fixed to the lower end of the tightening base 3, and the other end is fixed to the child seat base 12.
By mounting in this way, there is a gap between the lower surface of the tightening base 3 attached to the child seat base 12 and the upper surface of the guide plate 13 and between the guide groove 14 of the guide plate 13 and the support member 15. When the seat portion 11 reclines in the direction of the arrow CD as described above, the guide plate 13 does not contact either the tightening base 3 or the support member 15 and can move smoothly. It has become.
[0014]
By the way, when the tightening device 1 is exposed to the seat portion 11, it is an obstacle, and considering the workability and usability when the seat belt 61 is tightened or tightened, the tightening device 1 is It is preferable to be able to tighten from there. Therefore, in the third embodiment of the present invention, as shown in FIGS. 3 and 4, a door 17 that opens and closes around the hinge 16 is provided in the seat portion 11, and the storage portion 18 formed at the lower portion of the door 17 is increased. The fastening device 1 is installed. The door 17 is provided with an operation knob 19 for performing an opening / closing operation. When the child seat CS is used, the door 17 is closed so as to close the storage portion 18 so as not to give the infant pain or discomfort. On the other hand, when the child seat CS is fixed on the seat or when the seat belt 61 is tightened, the door 17 is rotated in the direction of arrow E to open the storage portion 18.
[0015]
Next, tightening of the seat belt 61 using the tightening device 1 according to the present invention with the child seat CS attached to the seat will be described.
First, the child seat CS is placed at a predetermined position on the seat, and the door 17 closed about the hinge 16 is rotated in the direction of arrow E as shown in FIG. The retightening device 1 of the present invention is exposed as shown in FIG. Therefore, the adjusting screw 6 is rotated in the direction of arrow B to pull up the pressing plate 7, thereby creating a large gap between the upper surface of the tightening base 3 and the pressing plate 7. Next, the tongue 23 of the shoulder side belt 61 is pulled, the seat belt 61 is pulled out from a vehicle retractor (not shown) in the upper right of FIG. After the seat belt 61 is inserted into a large gap between the base 3 and the pressing plate 7, the seat belt 61 is extended to the opposite side (left side in FIG. 4), and the tongue 23 is fixed to the seat or floor at one end. The child seat CS is temporarily fixed to the seat by the vehicle seat belt 61 by engaging with the buckle 25 attached to the other end of the vehicle 24.
Thereafter, the shoulder belt 61S of the seat belt 61 is pulled back to the vehicle retractor side, thereby loosening the vehicle seat belt 61.
Next, tightening is performed using the tightening device 1. That is, in the state of FIG. 1, the adjusting screw 6 is rotated in the direction of arrow A, and the pressing plate 7 is lowered. As a result, as shown in FIG. 2, the seat belt 61 is pushed into the recess 2 by the pressing plate 7, and the seat belt 61 is tightened in accordance with the pushing amount, thereby securely fixing the child seat on the vehicle seat. be able to.
Finally, if the door 17 that has been opened is closed, the tightening device 1 is hidden under the seat portion 11 so that the aesthetic appearance is not impaired and does not get in the way.
Although not shown in the drawing, on both sides of the seat belt tightening device 1, as in the case of the seat belt tightening device 1, seat belt presser fittings fixed to the child seat base 51 are provided. The seat belt introduced into the apparatus 1 and derived from the seat belt tightening apparatus 1 is kept horizontal for a predetermined distance.
[0016]
【The invention's effect】
As described above, according to the seat belt tightening device of the present invention, the seat belt is bridged on the recess by pressing the seat belt on the tightening base and turning the adjusting screw. The belt is pushed and pushed into the recess, and the tension of the belt increases according to the pushing amount at this time, and the tightening is easily performed.
Further, according to the child seat having the above-described configuration provided with the seat belt tightening device, it is possible to deploy the seat belt tightening device at an easy-to-use position even for a reclining child seat, and the aesthetics are also impaired. I can't.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a seat belt tightening device of the present invention.
FIG. 2 is a front view showing a tightening state using the seat belt tightening device of the present invention.
FIG. 3 is a perspective view of a child seat to which a seat belt tightening device is applied.
4 is a perspective view of the child seat with the door 17 of FIG. 3 opened, as seen from a direction different from that in FIG. 3;
FIG. 5 is a front perspective view showing a configuration of a child seat targeted by the present invention.
6 is a perspective view showing the back side of the child seat in FIG. 5; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seat belt tightening apparatus 2 Recess 3 Retightening base 4 Standing member 5 Screw hole 6 Adjustment screw 7 Press plate 11 Seat part 12 Child seat base 13 Guide plate 14 Guide groove 15 Support member 17 Door 18 Storage part 23 Tongue 24 Fixation Belt 25 Engagement tool 61 Seat belt 61S Shoulder side belt 61W Waist side belt

Claims (5)

In the seat belt tightening device for tightening the seat belt used for fixing the child seat on the seat of the vehicle,
Reinforcement base having a recess with a high end and a recess in the middle part, a standing member provided with an extending part extending from the tightening base and extending above the recess, and the extension A seat belt tightening device comprising: a moving member supported by a portion and movable toward the concave portion; and a pressing plate provided at a tip of the moving member. 2. The seat belt according to claim 1, wherein the moving member is constituted by an adjusting screw in which a screw portion and an operation portion are integrated, and a screw hole into which the screw portion is screwed is formed in the extending portion. Retightening device. In the child seat having the child seat base, and the child seat main part reclinably attached to the child seat base,
A guide plate is attached integrally with the child seat main portion in the vicinity of a substantially central portion of the child seat main portion, and an elongated guide groove is formed in the center portion of the guide plate in the reclining direction of the child seat main portion. A child seat for a seat belt tightening device, wherein a support member is inserted, one of the support members is fixed to the child seat base, and a seat belt tightening device can be attached to the other of the support members. The child seat for a seat belt tightening device according to claim 3, wherein the tightening base of the seat belt tightening device according to claim 1 or 2 is fixed to the other of the support members. The child seat according to claim 4, wherein the guide plate has a storage portion for storing the seat belt tightening device.

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