JPS6145125A - Compression spring device - Google Patents

Abstract

PURPOSE:To facilitate control through which a compression spring device is brought to a condition in that an expansion force is always produced, by a method wherein, after the compression spring device is attached in a most expanded state between a reference member and a moving member, a mechanism, serving to compress the spring device, is mounted to a coupling part. CONSTITUTION:A compression spring device 14 is located between a reference member 3 and a moving member 4 by means of coupling tools 16 and 17 so that an expansion force is always produced. Meanwhile, the coupling tool 17 has a base frame 25, locked to the one of upper members, a moving piece 32, disposed in a moving passage formed in the base frame 25, and a control bolt 38 mounted to the base frame 25 adapted to move the moving piece 32, and the moving piece 32 is attached to a body 18 or a push lever 22 of the compression spring device 14. After the compression spring device 14 is located in a most expanded state between the reference member 3 and the moving member 4, an expansion force is exerted on the compression spring device 14 through movement of the moving piece 32 of the coupling part 17.

Description

[Detailed description of the invention] The present invention aims to solve the following problems.

(Field of Industrial Application) The present invention relates to a compression spring device used when it is desired to exert a biasing force in a direction away from a reference member on a moving member that moves toward or away from the reference member.

(Prior Art) A compression coil spring, which has been conventionally used as this type of compression spring device, is intended to be interposed between a reference member and a moving member in a state where an extension force is always generated. In this case, both ends of the compression coil spring must be connected to the above-mentioned members in a compressed state, and this work is extremely difficult.

(Problems to be Solved by the Invention) This invention aims to eliminate the above-mentioned conventional problems and provide a compression spring device that can be inserted between a reference member and a moving member with easy operation. It is.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Function) With the pushing rod at its maximum extension point relative to the main body, the connectors at both ends are fixed to the reference and moving member. Next, when the operating screw is turned and the slider is moved relative to the base frame, the pushing rod also contracts from its maximum extension point relative to the main body. As a result, the push rod exhibits a force in the direction of extension from the body.

(Example) Below, drawings showing examples of the present application will be described. The drawings show a storage ladder device as an example of the use of a compression spring device, with reference numeral 1 showing the ceiling of a room, and 2 showing the storage ladder device attached thereto.

In this, 3 is a frame fixed to the ceiling along the green opening hole of the ceiling 1, 4 is a ladder mounting plate, one end is hinged to the frame 3 via a hinge 5, and the other end is is a pair of locking devices 6
．． 7 so that it can be attached to and detached from the frame 3. This ladder mounting plate 4 also serves as a closing plate for the opening, and its planar shape corresponds to the opening. Reference numeral 8 denotes a connecting arm fixed to the upper surface of the end of the pivoting part of the ladder mounting plate 4 by a mounting bolt/nut fox, and 9 is a ladder, which connects the plurality of elements ga, 9b, . . . in a foldable manner. sb, the topmost element 9a is the connecting arm 8 and the fixture 10.
It is attached to the mounting plate 4 using. Lower element 9b,・
... can all be placed on the mounting plate 4 in a folded state. U is a stay, which has a center-folding structure, and one end and the other end are connected to the frame body 3 and the mounting plate 4 using connecting tools 13, respectively.

Next, the compression spring device 14 will be explained. The positive one is a Gannu spring exemplified as a compression spring, one end of which is connected via a connector 16 to the tip of a connecting arm 8 exemplified as a moving member, and the other end connected to the middle part of the frame 3 exemplified as a reference member. They are connected via a connector 17. In the above-mentioned gas spring, the main body is a cylindrical cylinder, one end of which is provided with an inner flange-like stopper m', while the other end is closed. Reference numeral 19 denotes a seal body disposed inside the stopper front, and 19 denotes a piston slidably provided in the front direction of the cylinder, which has a narrow communication hole that communicates the left and right cylinder chambers 18a and 18b. ing. n is a piston rod exemplified as a pushing rod,
The tip is connected to the above-mentioned bistonk. A damping spring is fitted in the cylinder chamber ga. Compressed gas is sealed in the cylinder chambers 18B and 18b as a biasing member, and the pressure of the compressed gas applies to the piston rod 4 so as to apply a thrust in the projecting direction. In order to apply the above-mentioned thrust, a compression coil spring is provided as a biasing member on the cylinder wall, and one end of the spring is brought into contact with the bottom of the cylinder and the other end is brought into contact with the piston, so as to apply the same force to the piston as described above. You can also do this.

Next, in the connector 17, δ is formed by pressing a metal plate with the base frame sb, and the bottom plate 31 is riveted on the back side) 31
Step 8 is installation. The hole is a fixing hole, and is designed to be fixed to the frame 3 using a fixing screw. I and 27 are guide walls, and a moving path is formed between them. 4 is an earthen wall with a long hole J formed therein.

& is a mover placed on the moving path, and a hexagonal prism is used, and the side &, 33 is a guide wall! You will be guided by. The key is a connector, and a set screw portion 34a at the base is hinged to a screw hole 32a of the movable blade, and a spherical portion 34b is provided at the tip. The part is a connecting body which is further attached to the cylinder, and the spherical part 34b is fitted into the concave part 35a thereof, and is prevented from coming off by a ring holder. An operating threaded rod is screwed into a nut 37 welded to the base frame B, and its tip 38a is opposed to a receiving portion 32b provided on the slider ρ. Next, in the connector 16, the connector is a connector attached to the piston rod n, and has a spherical recess 41a. The dowel is a fastening elongated hole that is formed at the tip of the connecting arm 8 and serves as a fastening part. The kudzu is a connector, and the detail 43b is inserted into the fastening long hole string, and the connecting arm 8 is clamped between the collar part 43C and the nuff 44 so that it can be tightened and loosened. Reference numeral 8a is a spherical portion which is connected to the connecting body d in the same manner as in the case of the connecting tool (2).

When storing the ladder with the above configuration after using it in the state shown in Fig. 1, first the ladder elements 9'b, .
・is folded onto the element 9a, then the ladder mounting plate 4 is rotated upward around the hinge 5 to the state shown in FIG. 2 (the ladder element is not shown), and the pair of locking devices 6 are folded. .7 are engaged with each other to maintain the above state. When rotating the ladder mounting plate 4 upward as described above, the compression spring device 14
Since the extension force urges the mounting plate 4 in the same direction via the connecting arm 8, this operation can be performed with a light force.

On the other hand, if it is desired to change from the state shown in FIG. 2 to the state shown in FIG. 1, the operation opposite to the above may be performed. In that case as well, the expansion force of the compression spring device 14 exerts a biasing force 11 similar to that described above, so that the operation can be performed by simply applying a small force without having to support the heavy gravity of the mounting plate 4.

Next, the installation work of the compression splash device 14 will be explained.

First, in the device 14, the connecting tool 17 is set in the state where the operating screw rod is in the most retracted state as shown in FIG. 7(a), and the first ladder mounting plate 4 is set in the state shown in FIG. In this state, connect the connectors 16 and 17 to the connecting arms 8, respectively.
, fasten to the frame body 3. In this case, since the rod 4 is at the maximum extension point with respect to the cylinder, the movement of the piston to the left in Figure 7 is stopped by the graph in Figure 7. As is clear from point (a), the compression spring device 14 does not have an expansion force. Therefore, the work of fixing the connection piece 17 can be easily performed.

Next, turn the operation screw apex and use the tip 3Ba to move the element! is moved along the moving path, and the rod 4 is contracted relative to the cylinder as shown in FIGS. 7(b) to 7(0).

By contracting in this way, the above-mentioned restraint on piston drying caused by the stopper disappears, so that the rod η changes from point (B) to point (C) in the graph of FIG. This results in a state in which a large stretching force is generated.

The contraction operation as described above may be performed until the compression spring device 14 exhibits the required extension force.

As a result of the above-described operation, the compression spring device 14 applies a large biasing force to the mounting plate 4 via the connecting arm 8 even when the ladder mounting plate 4 is in the position shown in FIG.

Therefore, as described above, the ladder mounting plate 4 can be easily raised and lowered.

The above-mentioned operation for applying an elongating force can be performed by simply turning the operating screw rod with a small force. Therefore, even if the operation is performed in the state shown in FIG. 1, it can be easily performed with a small force.

Next, if the magnitude of the urging force exerted on the mounting plate 4 by the extension force of the compression spring device 14 is not a preferable value, move the fixing position of the connecting tool 16 to the connecting arm 8 along the elongated hole C,
Thereafter, as in the case described above, an extension force is generated by operating the operating screw rod. In this case, since the distance that the mover & can move along the moving path device is long, the above-mentioned operation for generating the stretching force can be performed without any problem no matter where the connector 16 is fixed at the end of the long hole. can.

Next, the connection relationship of the connecting body part 41 to the connecting pre-adjustment 43 is a relative one, and the connecting body 5 may be connected to the connection +6, and the connecting body d may be connected to the connecting pre-adjustment.

Furthermore, the connection relationship between the two connectors 17 and 16 with respect to the frame 3 as a reference member and the connecting arm 8 as a moving member is also relative;
may be fixed to the frame 3.

Next, the places where the compression spring device is used are not limited to storage ladders as mentioned above, but also in beds that can be stored against a wall, where an upward rotational force is applied to the main body of the bed, and on the back of a wagon. It may be used to apply an upward biasing force to a lift-type door.

(Effects of the Invention) As described above, in the present invention, when it is desired to apply a biasing force to a movable member in the direction of moving it away from the reference member, it is possible to fix the connectors 16 and 17 at both ends to them respectively. Moreover, there is an advantage that the extension force of the compression spring device 14 can be applied in a direction in which the moving member moves away from the reference member 9b.

Moreover, even if the compression spring device 14 has such an extension force, when the compression spring device 14 is assembled between the reference member and the moving member,
With the stopper 4' in the compression spring device 14 restraining the extension of the pushing rod ρ, that is, with no extension force in the compression spring device, the connectors 17 and 16 at one end and the other end of the compression spring device 14 are connected to the reference member and the other end, respectively. It has the effect that it can be correctly attached to the moving member and that the fixing work can be easily performed.

Moreover, in order to generate an extension force in the compression spring device 14 after assembly, turn the operating screw rod in one of the connectors ν and move the slider! While pushing the lever along the moving path, the compression spring device 14 can be compressed to the point where the pushing rod is no longer held back by the stopper, thereby generating an extension force. . This means that the 1st K.
There is an operational effect in that the operation to generate the stretching force can be easily performed with a small force. Second, even if the accuracy of the fixing position of the connecting tool with respect to the reference member and the movable member is rough, the fixing and extension force generation operations can be performed accurately in the above-mentioned easy operations. effective.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a longitudinal cross-sectional view showing the ladder mounting plate of the storage ladder device in a downwardly opened state, and FIG. 2 is a longitudinal cross-sectional view showing the ladder mounting plate in a closed state. ,
Figure 3 is an enlarged cross-sectional view taken along ■-■ line, Figure 4 is a front view of the connector, Figure S is a cross-sectional view taken along V-V, Figure 6 is a cross-sectional view taken along Vl-Vl, and Figure 7 is a compression spring. A piece that shows the expansion and contraction state of the device as well as the relationship between it and the expansion force using a graph. 14...Compression spring device, thought...main body, η...pushing rod, 17...connecting tool, δ...base frame,! ...Mover, field...Operating screw keyaki. Figure 1 Wi2 Figure 3 Figure 4 Figure 7

Claims (1)

[Claims] The main body is provided with a pushing rod that can freely extend and contract outward from one end of the main body, and the main body is provided with a biasing rod that urges the pushing rod in the direction of extension. The main body is further provided with a stopper configured to prevent the pushing rod from extending beyond the maximum extension point, and the other end of the main body and the tip of the pushing rod are further provided with a stopper. In this compression spring device, one of the two connectors is connected to the reference member or the movable member. It has a base frame that can be fixed to the moving member, and the base frame is provided with a long moving path in the direction of expansion and contraction of the pushing rod, and the moving path includes a moving member along the moving path. Further, an operating threaded rod is disposed on the base frame so that its tip protrudes into the moving path, and by rotating the operating threaded rod with respect to the base frame, the tip of the operating screw rod is moved along the moving path. In addition, the tip of the operating threaded rod is opposed to the slider so that it can be pushed, and the other end of the main body or the tip of the pushing rod is connected to the slider. A compression spring device, characterized in that it is connected to.