JPS64255B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a jump seat, and more particularly to a seat in which a seat cushion is rotatably provided on the side or rear of the driver's cab of a freight vehicle such as a truck.

[Prior art]

Conventionally, as this type of jump sheet, there is one shown in FIG. 1, for example.

In other words, in freight vehicles such as trucks,
When transporting long distances, for example, two drivers can drive in shifts during the day and night.There is a seat on the side of the driver's cab for the other driver to take a nap or take a break while one driver is driving. , or located at the rear. When not in use, the seat is a jump seat that can hold the seat cushion 3 in an upright position in order to make effective use of the driver's cab.
The seat cushion 3 is rotatably attached to a base 7 attached to a floor 6 at the rear or side of the driver's cab. In use, when the seat cushion 3 is rotated and held in a horizontal state via the stay 9, the user can sit with his or her back leaning against the body panel 8 which functions as a seat back.

However, in the case of such conventional jump seats, the seat cushion 3 is rotatably attached to a base 7 attached to the floor 6 at the rear or side of the driver's cab, so it cannot be moved when not in use. When the seat cushion 3 is erected, the back side of the seat cushion 3 is completely visible, and the rotating mechanism is completely visible, which not only deteriorates the appearance, but also takes up a large space, and furthermore, there is no locking device, making it unusable. It was stable.

〔the purpose〕

Therefore, this invention was made by focusing on such conventional problems, and its purpose is to prevent the surface of the seat cushion from turning when the seat cushion is rotated and held in an upright position. In addition to oriented toward the center of the room, the rotating mechanism such as the link is located on the back side of the seat cushion to improve the appearance, and the base is placed as close to the body panel side as possible to improve the appearance of the car. This allows for effective use of the room, improves safety by preventing rotational mechanisms such as links from being exposed on the front side, and enables storage and set locks with a single lever, allowing for easy lock operation. facilitate,
To provide a jump seat with improved stability of the entire seat.

〔composition〕

The structure of the present invention in accordance with the above object is that in a jump seat in which a seat cushion is rotatably attached to a base via a link, the seat cushion is attached interposed between the back side of the seat cushion and the lower part of the base, and the return A first link urged to rotate rearward by a spring, a position on the back side of the seat cushion that is a predetermined distance rearward from the connection point of the first link with a pin, and the upper part of the base. a second link attached to the
A lever formed by bending one end of a shaft rotatably attached to the base at the rear near the attachment point of the second link to the base, and a lever formed on the shaft in an approximately L shape and a hook at the upper end. a hook having a fixed center portion, a hook pin provided at an intermediate portion of the first link so that the hook portion of the hook engages when the seat cushion is raised; and an intermediate portion of the second link. A hook pin that is loosely inserted into an elongated hole formed in the hole, a link whose other end is fixed to the hook pin and whose one end is rotatably attached to the lower end of the hook, and a link provided on the back side of the seat cushion to determine the seating state of the seat cushion. It is equipped with a hook part that engages with a hook pin located on the rear end side of the elongated hole, and a return spring that always biases the hook part of the hook to rotate forward.The hook part can be moved rearward by operating a lever. The other end of the link, which is rotatably attached to the lower end of the hook, and the hook pin are moved to the front end of the elongated hole to release the engagement between the hook pin and the hook part. The hook part engages with the hook pin of the first link, and the surface thereof becomes the front side when the seat cushion is erected.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4.
This will be explained in detail based on the figures.

The drawings show an embodiment in which the present invention is applied to a seat for a freight vehicle such as a truck. In this type of automobile, the driver's cabin is generally separated from the luggage compartment by a body panel and is narrow. Therefore, jump seats are placed at the rear or side of the driver's cab as seats for napping or resting. Then, when not in use, seat cushion 1
0 is rotated rearward and stored in an upright position, the surface of the seat cushion 10 is directed toward the center of the vehicle interior, and the rotation mechanism such as the link is positioned on the back side of the seat cushion 10 for a better appearance. This was designed to improve safety.

That is, reference numeral 11 indicates a base, and a first link 12 and a second link 13 as a rotation mechanism are interposed and attached between this and the seat cushion 10. The first link 12 is for applying rotational force to the seat cushion 10 in the upright direction, and one end is attached to the back side of the seat cushion 10 via a pin 16 provided on the bracket 14, and the other end is attached to the back side of the seat cushion 10 via a pin 16 provided on the bracket 14. is attached to the lower part of the base 11 via a pin 15. A return spring 15A wound around the pin 15 urges the first link 12 to rotate rearward. Thereby, the seat cushion 10 can be jumped from the seated state and stored in the upright state. On the other hand, the second link 13 has one end connected by a pin to a position on the back side of the seat cushion 10 spaced a predetermined distance rearward from the pin connection point of the first link 12,
The other end is connected to the upper part of the base 11 with a pin.
The seat cushion 10 supported by the pair of links 12 and 13 acts as a kind of rotatable link, and the base 11 acts as a kind of fixed link, and the seat cushion 10 as a whole acts as a kind of rotatable link. It has a joint rotation mechanism. As a result, as the links 12 and 13 rotate, the seat cushion 10 is in a substantially horizontal seated state when set, and is in a substantially vertical upright state when stored, with limited movement midway. It's becoming like that.

Therefore, a locking device 18 that enables storage lock and set lock by operating a single lever 17 is attached to the upper part of the base 11 to facilitate the locking operation and improve the stability of the entire seat. has been done. That is, a shaft 17A is rotatably attached to the upper part of the base 11, and one end extends laterally and is bent at a substantially right angle from the side of the base 11 to form a lever 17.
A center portion of a hook 19 is fixedly attached to the shaft 17A, and a hook portion 20 is formed at the upper end. The hook portion 20 can be locked for storage by locking into engagement with a hook pin 21 protruding from a corresponding inside position of the first link 12. Further, a link 22 having one end connected with a pin to the lower end of the hook 19 is connected to the lever 17.
The set lock is made possible by the operation of the . A hook pin 23 fixedly attached to the other end of the link 22 is loosely inserted into a long hole 24 formed in the second link 13 and is removably engaged with a hook portion 25 provided on the back side of the seat cushion 10. configured to match. And hook pin 2
3 and the hook portion 25, the seat cushion 10 is set and locked, and the seated state is maintained. Furthermore, when the locking engagement between the hook pin 23 and the hook portion 25 is released, the seat cushion 10 floats up by the spring 26 attached to the connecting pin 13A at the tip of the second link 13, and then moves as desired. I am now able to jump while doing this. Further, 27 is a return spring, one end of which is secured to the hook 19, and the other end of which is secured to the upper portion of the base 11, respectively. As a result, the hook 19 is urged to rotate in the direction of the storage lock, and the link 22 is also urged to move in the direction of the set lock.

Next, the effect will be explained.

FIG. 2 shows the seat cushion 10 in a seated state. To jump the seat cushion 10 from this seated state to the stowed state shown in FIG.
First, it is necessary to release the set lock in the seated state. Then, when the lever 17 is pulled upward, the hook 19 rotates rearward, thereby pushing the link 22 forward. Then, the hook pin 23 at the tip moves forward within the elongated hole 24 and at the same time comes off from the hook portion 25. As a result, the set lock is released and the seat cushion 10 becomes free, so that it floats due to the biasing force of the spring 26 and becomes a floating state as shown in FIG. 3. From this state, the seat cushion 10 rotates forward through a predetermined trajectory by the first link 12, which is urged to rotate rearward via the return spring 15A, and revolves rearward. . As a result, the seat cushion 10 is in an upright state with its surface facing forward, and
The rotating mechanisms such as the links 12 and 13 also stand up on the back side and are covered. This is the stored state shown in FIG. Next, in order to lock the housing to maintain this stored state, interference between the hook portion 20 and the hook pin 21 is avoided by pulling the lever 17 upward and rotating the hook 19 backward. When the lever 17 is returned to its original position by the biasing force of the return spring 27, the hook portion 20 locks into engagement with the hook pin 21, and rotation of the first link 12 is prevented. Due to this. A storage lock is secured.

Note that in order to pull the seat cushion 10 forward from the stowed state and set it in the seated state, the process from the stowed state to the seated state can be achieved by going through a process that is the reverse of the process described above.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various applications and modifications are possible.

〔effect〕

As is clear from the above description, according to the present invention, the seat cushion is installed interposed between the back side of the seat cushion and the lower part of the base, and is urged to rotate rearward by a return spring. 1st
a link, and a second link installed interposed between the back side of the seat cushion and the upper part of the base, which is spaced a predetermined distance from the pin connection point of the first link.
attached to the link and the top of the base, 1
Equipped with a locking device that enables storage lock and set lock by operating the book lever, so when the seat cushion is rotated and stored in an upright position, the surface of the seat cushion is oriented toward the front. At the same time, the appearance can be improved by locating a rotation mechanism such as a link on the back side of the seat cushion. Further, since the rotating mechanism such as the link is not exposed on the front side, safety is also excellent. The locking device includes a lever formed by bending one end of a shaft rotatably attached to the base at the rear near the attachment point of the second link to the base, and a lever formed in an approximately L shape on the shaft. a hook provided at an intermediate portion of the first link so that the hook portion of the hook engages when the seat cushion is raised; A hook pin that is loosely inserted into a long hole formed in the middle of the two links, a link whose other end is fixed to this hook pin and whose one end is rotatably attached to the lower end of the hook, and a link that is provided on the back side of the seat cushion and is attached to the seat cushion. It consists of a hook part that engages with a hook pin located at the rear end of the long hole when the cushion is seated, and a return spring that always biases the hook part of the hook to rotate forward. The hook part is rotated backward to move the other end of the link rotatably attached to the lower end of the hook and the hook pin to the front end of the elongated hole to release the engagement between the hook pin and the hook part, and then return. The hook portion engages with the hook pin of the first link that has been raised by the spring. Therefore, the storage lock and the set lock can be performed by operating a single lever, which facilitates the lock operation and improves the stability of the entire seat.

Furthermore, since the base can be mounted as close as possible to the body panel side, the vehicle interior can be used effectively.

[Brief explanation of drawings]

Figure 1 is a side view showing a conventional jump seat.
Fig. 2 shows the structure of a jump seat according to an embodiment of the present invention, and is a side view showing the seated state, Fig. 3 is a side view showing the seat cushion in the floating state, and Fig. 4 is a side view showing the seat cushion in the floating state. It is a side view showing a stored state. 10... Seat cushion, 11... Base,
12...First link, 13...Second link, 15
A...Return spring, 17...Lever, 1
7A...Shaft, 19...Hook, 20...Hook part, 21...Hook pin, 22...Link,
23... Hook pin, 24... Long hole, 25... Hook portion, 27... Return spring.

Claims (1)

[Scope of Claims] 1. In a jump seat in which a seat cushion 10 is rotatably attached to a base 11 via links 12 and 13, the seat cushion 10 is attached interposed between the back side of the seat cushion 10 and the lower part of the base 11. the seat cushion 10 is spaced a predetermined distance rearward from the connection point of the first link 12 by the pin 16; and a shaft 17A rotatably attached to the base 11 at the rear near the attachment point of the second link 13 to the base 11. A lever 17 formed by bending one end; a hook 19 formed in a substantially L-shape on the shaft 17A and having a hook portion 20 at its upper end and fixed at its center; and a hook portion of this hook 19. 20 engages with the seat cushion 10 when it is raised.
2, a hook pin 23 that is loosely inserted into a long hole 24 formed in the middle of the second link 13; A link 22 that is movably attached, and a hook portion 2 that engages with a hook pin 23 that is provided on the back side of the seat cushion 10 and is located on the rear end side of the elongated hole 24 when the seat cushion 10 is in the seated state.
5, and a return spring 27 that always urges the hook portion 20 of the hook 19 to rotate forward, and when the lever 17 is operated, the hook portion 20 is rotated backward and rotated to the lower end of the hook 19. The other end of the link 22 and the hook pin 23, which are attached so that they can be moved, are moved to the front end of the elongated hole 24 to release the engagement between the hook pin 23 and the hook part 25, and then the first link 12 is raised up by the return spring 15A.
A jump seat characterized in that a hook portion 20 is engaged with a hook pin 21 of the jump seat, and the surface thereof is the front side when the seat cushion 3 is erected.