JPH0329228Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to the improvement of a seat damper having a shock absorbing device, and is particularly suitable for application to the seat support mechanism of a vehicle with strong vertical movement, such as a small motor boat. It is what it is.

<Prior art> The impact that a motor boat receives from the collision between the bottom of the boat and the crest of a wave while traveling at high speeds is extremely large, so the seats of these boats are equipped with a damper mechanism in their support structure to absorb the impact. are used. Furthermore, even when the hull curves, it is necessary to prevent the seat from inadvertently rotating in order to ensure the safety of the crew members, and furthermore, when towing water skis, Alternatively, when attempting trolling, it is required to turn the rear seat backwards and fix it. etc. have been proposed, and some of them have been put into practical use.

<Problems to be solved by the invention> By the way, in the former of the above-mentioned conventional devices,
The upper bracket and the lower bracket are connected by a link mechanism as a rotation prevention mechanism for the seat part, but since this link mechanism is arranged to protrude outside the column, the column structure itself becomes bulky. When the seated person moves, the legroom of the seated person becomes narrower.
Not only does this cause inconveniences such as getting stuck,
Dynamically disadvantageous.

On the other hand, the latter anti-rotation mechanism is constructed by slidingly fitting a guide pin into a guide groove provided between the outer tube and the inner tube, so it is advantageous in that it does not protrude outward. On the other hand, since a part of the guide groove formed on the inner tube side is exposed above the outer tube, seawater etc. can enter the groove through the gap in the exposed guide groove, and Since it is difficult to clean this part, which is a narrow closed gap, rust is likely to occur in the internal structure. This was disadvantageous in terms of cost, such as the need to cover it with a protective cover.

Therefore, the present invention has both the functions of a rotation prevention mechanism and a redirection mechanism built into the support structure, and has an excellent dust and moisture proof effect at the sliding fitting part between the inner tube and the outer tube. It was developed with the aim of providing a seat damper that can satisfy various functions as a support column mechanism.

<Means for solving the problem> According to the present invention, a damper device is disposed between a lower bracket and an upper bracket, and both brackets are arranged so as to cover the damper device. In a strut mechanism in which an outer tube and an inner tube extending from each other are removably inserted, a guide tube is attached to the bracket on the outer tube side, and the guide tube and the inner tube move only in the relative axial direction. The inner tube is engaged through a rotation prevention mechanism that allows rotation, and the inner tube is configured to be able to be engaged and detached in a rotational direction with the intervention of the guide tube, so that the rotational position of the upper blanket can be varied. This is accomplished by configuring.

<Function> In other words, the guide tube and inner tube provided in the outer tube constitute a detent mechanism in which the sliding surfaces of their fitting portions slide into each other under an irregular cross-sectional shape such as a polyhedron. So,
The inner tube can slide freely in the vertical direction (thrust direction) with respect to the guide tube which is directly or indirectly locked to the outer tube side bracket, but in the rotation direction it is not in its normal operating position. It is in a state of regulation.

Therefore, the inner tube side bracket and the outer tube side bracket are prevented from relative rotation under normal use conditions. That is, rotation of the seat attached to the upper bracket is prevented.

Moreover, due to the configuration of the guide tube arranged in the outer tube, a bearing part that fits closely with the outer circumference of the inner tube can be installed at one end of the outer tube that fits with the inner tube. This is possible, and a dust seal can be additionally provided in this part, so that it is possible to prevent seawater, dust, etc. from entering the support structure in this part.

Then, by releasing the lock between the guide tube and the outer tube side bracket, or by lifting the inner tube from its normal operating range to a rotation permissible position with respect to the guide tube, the inner tube side bracket and the outer tube side bracket are connected to each other. Since the bracket can be operated in a relative rotational direction, in this state, orient the sheet in the desired direction and lock the guide tube again or engage the inner tube and the guide tube at the irregular cross-section portion. This makes it possible to change the orientation of the sheet.

Next, the illustrated embodiment will be described.

<Embodiment> FIG. 1 is a half-cut vertical sectional view showing an embodiment of the present invention, in which an outer tube 2 is integrally extended to a lower bracket 1 fixed to a floorboard, and a guide tube 3 is installed in the lower area of the tube 2. It is fitted with.

On the other hand, reference numeral 4 designates an inner tube, to which an upper bracket 5 as a seat attachment part is integrally fixed to the upper end, and whose lower part is inserted into the outer tube 2, and whose tip outer periphery has an irregular cross-sectional shape other than circular. Then, it is fitted and inserted into the guide tube 3 (second illustrated state), which has an inner circumferential shape that matches the outer circumferential shape.

In the lower part of the outer tube 2,
A stopper pin 8 having a tendency to move inwardly and protruding inward is installed on the hollow bolt 6 with the help of an expansion spring 7, and a knob 9 is integrally attached to the outer end of the pin 8.
By positioning the inner end of the pin 8 in contact with the outer end of the bolt 6, the tip of the pin 8 engages with the engagement hole 10 drilled in the guide tube 3 without protruding from the inner peripheral surface thereof. It has been done. or,
A plurality of engagement holes 10 in this guide tube 3 are arranged around the circumference (for example, at 90° intervals).

Furthermore, a bearing 11 is provided at the upper end of the outer tube 2 to make close sliding contact with the circumferential wall of the cylindrical upper part of the inner tube 4.
is provided to prevent dust, water droplets, etc. from entering from this sliding fitting end.

In addition, 13 is a damper main body, the lower end of which is fixed to the bottom plate of the lower bracket 1 with a nut 14, the rod 15 of which is screwed into the center of the upper bracket 5, and the outer casing of the main body 13 and the above bracket 5 An auxiliary spring 16 is interposed between the two.

The engagement holes 10, 10, . . . in the guide tube 3 are engaged with the stopper pin 8.
As an alternative and simple means, a screw 17 may be used as shown in the third figure.

FIG. 4 is a partially cutaway side view of another embodiment of the present invention, in which a guide tube 3' is inserted inside an inner tube 4.
In this case, as shown in Figure 5, thrust grooves 18 are provided at symmetrical positions on the outer circumferential surface of the guide tube 3' to form an irregular cross-section, and the lower end shape of the inner tube 4 is made to match this irregular cross-section. In addition to constructing the shape to fit these, in particular,
A circumferential groove 19 having the depth of the thrust groove 18 is provided at the upper end of the guide tube 3'.
In addition, the guide tube 3' has its lower end connected to the bolt 2.
0 to the lower bracket 1, and
The engagement 21 between the inner wall stepped portion of the tube 3' and the outer circumferential stepped portion of the damper main body 13 serves also to fix the lower portion of the damper main body 13.

On the other hand, according to this configuration, the auxiliary spring 16 is disposed between the bracket 5 and the tip of the guide tube 3', and the fitting 22 is interposed at the tip of the tube 3'. and the tip of the tube 3'.
A pressure expansion spring 23 which is weaker than that is provided. In addition,
The components of this contact fitting 22 and the expansion spring 23 are as follows:
This may be arranged between the bracket 5 and the auxiliary spring 16. Further, a spring 24 is interposed in the rod 15 of the damper body 13 to reduce the impact when the damper is fully extended. Other functional members common to those of the first illustrated embodiment are given the same symbols.

FIG. 6 shows a simplified configuration of the fourth embodiment. That is, in this embodiment, the circumferential groove 19, the contact fitting 22, and its expansion spring 23 in the guide tube 3' are omitted, and instead, the direction in which the tube 3' is fixed by the bolt 20 is
It is made variable by selective attachment to a plurality of bolt holes provided in the tube 3'.

By the way, in this embodiment, the overall height can be reduced by 3, which is the sum of the fitting area length 2 and the irregular engagement length 1 between the outer tube 2 and the inner tube 4, which reduces the weight. It's advantageous.

According to the embodiment having such a configuration, the inner tube 4 that is fitted with the guide tube 3 or 3' can be fitted with the guide tube 3 or 3' based on the irregular cross-sectional shape of the fitting surface of the guide tube 3 or 3'. It slides freely in the vertical direction (thrust direction), but in the rotational direction, the guide tube 3 or 3' is connected to the stopper pin 8 (first illustrated embodiment) and screw 17 (third illustrated embodiment). By fixing the inner tube 4 to the bracket 1 described below with a bolt (example) or a bolt (example shown in FIGS. 4 and 6), it is possible to prevent the inner tube 4, that is, the upper bracket 5, from rotating, thereby preventing the seat from being accidentally removed. Rotation is prevented.

Moreover, according to the embodiment shown in the first figure, by pulling the knob 9 to the right in the figure against the force of the pressure expansion spring 7, the stopper pin 8 can be pulled out from the engagement hole 10 and attached to the guide tube 3. With the engagement fixed released, the bracket 5 is rotated to rotate the guide tube 3 together with the inner tube 4 toward the next engagement hole 10, so that the next engagement hole 10 is aligned with the stopper pin. In the rotation range reaching position 8, the pin 8, which is released from the knob 9, fits into the engagement hole 10 due to the movement tendency due to the expansion spring 7, and locks the guide tube 3 again at that rotation position. Therefore, the orientation of the sheet can be easily changed. Similarly, in the embodiment shown in the third figure, the screw 1
By unscrewing and screwing 7, it is possible to change the orientation of the sheet.

In the embodiment shown in the fourth figure, the bracket 5 is lifted from the normal state (the state shown in the figure) in which the inner tube 4 is lowered by the weight of the assembled parts such as the bracket 5. Then, by pulling up the tip of the irregular cross section of the inner tube 4 to the area reaching the circumferential groove 19 of the guide tube 3', and operating it in the rotational direction,
The irregular cross-section portion (inner protrusion) moves along the circumferential groove 19 to form a thrust groove 1 at a symmetrical position.
When the bracket 5 is pressed down at the rotated position, the guide tube 3' is rotated to the position 8.
By fitting with the bracket 5,
That is, the orientation of the sheet can be easily changed whenever necessary.

In a mechanism intended for use in which the seat is changed only when the seat is installed or in a specific case after installation, it may have a simplified configuration as in the sixth illustrated embodiment. That is,
The direction in which the guide tube 3' is fixed with the bolt 20 can be determined by selecting the bolt hole, and after installation, the external bracket 1 is removed from the floor and the fixing position is changed using the bolt 20. This is possible.

In addition to the embodiments described above, an outer tube may extend to the upper bracket and an inner tube may extend to the lower bracket.

<Effects of the Invention> As described above, according to the damper of the present invention, the guide tube has a fitting portion having an irregular cross section such as a polygonal shape so as to fit with the inner tube and allow only relative axial movement thereof. This structure constitutes a rotation prevention mechanism, and by configuring the inner tube to be able to be engaged with and detached from the outer tube side bracket in the direction of rotation, rotation of the inner tube is prevented during normal use in the engaged state. The seat can be prevented from rotating at the bottom, and when the inner tube is disengaged, the inner tube can be rotated relative to the lower bracket, and the seat can be re-engaged at the rotational position at that time. In addition, by arranging the guide tube within the outer tube, it is possible to eliminate structural parts that are inconvenient in appearance and use, such as protruding outward from the support structure. Since it is not necessary to install a rotation prevention mechanism between the tube and the inner tube, it is possible to make these sliding contact parts, especially the upper end of the outer tube, closely slide into contact with the outer periphery of the inner tube. Since the intrusion of dust and seawater into the structure can be prevented without the need for supplementary parts such as boots, the damper of this invention can be used as a support structure for boat seats, improving the appearance and reducing the cost of the product. It is extremely useful.

[Brief explanation of the drawing]

Fig. 1 is a half-cut vertical sectional view showing one embodiment of the damper of the present invention, Fig. 2 is a cross-sectional plan view of the main parts of the same embodiment, and Fig. 3 is a main part of another embodiment of the damper of the invention. FIG. 4 is a partially cutaway side view of still another embodiment of the damper of the present invention, FIG. 5 is a cross-sectional plan view of the main parts of the same embodiment, and FIG.
The figure is a half-cut vertical side view showing still another embodiment of the damper of the present invention. 1... Lower bracket, 2... Outer tube, 3, 3'... Guide tube, 4... Inner tube, 5... Upper bracket, 8... Stopper pin, 10... Engagement hole, 11... Bearing,
13...damper body, 14...nut, 17...
...Screw, 19... Circumferential groove, 20... Bolt.

Claims (1)

[Claims for Utility Model Registration] (1) A damper device is disposed between a lower bracket and an upper bracket, and an outer tube and an inner tube are respectively extended from both brackets so as to cover the damper device. In the strut mechanism that can be inserted and removed freely, a guide tube is attached to the outer tube side bracket, and the guide tube and the inner tube are engaged with each other via a rotation prevention mechanism that allows only relative axial movement. . A seat damper, wherein the inner tube is configured to be rotatably engageable and detachable under the interposition of the guide tube, so that the rotational position of the upper blanket can be varied. (2) A locking member that penetrates toward the guide tube is provided in the outer tube, and a plurality of engaging holes that match the locking members are arranged at intervals around the guide tube, and these holes are arranged at intervals. The seat damper according to claim 1, wherein the rotation position can be varied by selectively inserting a locking member into a matching hole. (3) While fixing one end of the guide tube to the outer tube side bracket, a circumferential groove is provided at the tip of the tube, and the inner tube is pulled until the irregular cross-section portion of the tip reaches the circumferential groove. The seat damper according to claim 1, wherein the rotational position can be varied by allowing rotation of the seat damper.