JP2631913B2 - Telescopic support arm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic support arm used for a door of a casement window, an inspection port, various devices, and the like.

[0002]

2. Description of the Related Art Various types of telescopic support arms have been invented. For example, there is a support arm having a telescopic structure by reciprocating a piston rod in a cylinder. Such a telescopic support arm is used by attaching one end to a door and attaching the other end to a door frame.

[0003]

However, in the above-described conventional telescopic support arm, when the door is swiftly opened and the telescopic support arm is fully extended, an impact acts directly on the connecting portion between the cylinder and the piston rod. Therefore, there is a problem that the durability is poor. Also, when the telescopic support arms are used on both sides of the door, if the door is distortedly attached to the support frame or if the door is loosely attached to the support frame, these telescopic support arms may be used. However, there is a problem that one or both of them cannot be completely extended, and the door opening / closing operation cannot be performed smoothly.

Further, in the above-mentioned conventional telescopic support arm, the door can only be stopped and placed at the position where the door is fully opened or the position where the opening width of the door is set in advance, and the door can be stopped at any position. Could not put. Therefore, there is a problem that such a telescopic support arm is very inconvenient when it is desired to stop the door at a slightly opened position and to change the opening width of the door frequently. Was.

The invention of this application has been made to solve the problems of such a conventional telescopic support arm.

[0006]

According to the first aspect of the present invention, the rear end 2b of the inner arm 2 is inserted from the front end 1a of the outer arm 1 so that the outer arm 1 is slidable.
A long hole 3 is provided on the rear end 1b side, and an abutment 8 is provided inside the rear end 1b side.
A long hole 7 is provided on the side a, and a holding body 10 of the locking body 4 is provided in the front end 2a side of the holding body 10 in a direction of reduction of the telescopic support arm, and extends in the front and rear direction on the holding body 10. An elongated hole 12 is formed, and the spindle 11 of the locking body 4 is inserted into the elongated hole 12.
, The locking body 4 is rotatably and movably mounted in the front-rear direction on the holding body 10, and the locking body 4 is rotated by contact with the contact body 8, and the locking portion 4 a Is a telescopic support arm that can freely protrude and retract from the elongated holes 3 and 7.

According to the invention of claim 2 of the present application, the rear end 2b of the inner arm 2 is inserted from the front end 1a of the outer arm 1 so as to be slidable, and a long hole is formed in the rear end 1b of the outer arm 1. 3 and a contact member 8 is provided inside the rear end 1b.
On the other hand, a long hole 7 is provided on the front end 2a side of the inner arm 2, and a holding body 10 of the locking body 4 is provided inside the front end 2a side by urging in the direction of reduction of the telescopic support arm. The holding body 10 is formed with a long hole 12 extending in the front-rear direction, and the support hole 11 of the locking body 4 is supported in the long hole 12 so that the locking body 4 can be freely rotated and The locking member 4 rotates by contacting the abutting member 8 so that the locking portion 4a can be freely protruded and retracted from the elongated holes 3 and 7 and the outer arm 1 has The rack 5 is provided with the teeth 5a of the rack 5 arranged along the direction.
To the front end 2 of the inner arm 2
The claw portion 6a of the detent 6 attached to the a side is a telescopic support arm that is engaged.

[0008]

[0009]

The telescopic support arm according to the invention of this application is:
Due to the above-mentioned means, the following operations are provided.
In the telescopic support arm according to claim 1, when the telescopic support arm is extended, the locking body 4 comes into contact with the contact body 8 and slightly emerges from the elongated hole 3 of the outer arm 1, so that the telescopic support arm is extended. The locking portion 4a of the locking body 4 is locked to the end of the elongated hole 3 of the outer arm 1 in the direction in which the diameter decreases. Also,
At this time, even when the door is swiftly opened and the telescopic support arm is fully extended, the locking body 4 is subjected to the buffering action by the buffer mechanism 14 in a state where the locking body 4 is in contact with the contact body 8.

In the telescopic support arm according to the second aspect,
It has the same function as the telescopic support arm according to the first aspect, and in the direction in which the telescopic support arm extends, the claw part 6a of the detent 6 moves the tooth part 5a of the rack 5 intermittently. It becomes possible. Further, in the direction in which the telescopic support arm contracts, the teeth 5 a of the rack 5 and the pawls 6 a of the detent 6 remain engaged with each other, and the rack 5 is stopped by the detent 6.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of a telescopic support arm according to the present invention will be described below with reference to the drawings shown as an embodiment. FIG. 1 is a perspective view of a telescopic support arm according to the present invention, in which a front end 1a of an outer arm 1 is inserted from a rear end 2b of an inner arm 2 so that both can slide. The state where the locking portion 4a of the locking body 4 of the inner arm 2 is locked to the end of a long hole 3 of the outer arm 1 described later at the longest position of the arm.

The outer arm 1 is formed as a square tube by fitting two metal plates, each having a cross section bent in a substantially U-shape, facing each other, as shown in FIG.
The rack 5 is arranged inside along the longitudinal direction. The elongated hole 3 is provided on the rear end 1b side of the outer arm 1, and the contact body 8 is provided inside the rear end 1b.

The inner arm 2 is made of a metal plate whose section is bent in a substantially U-shape. Front end 2a of this inner arm 2
On the side, there is provided a detent 6 having a claw 6a at its tip for engaging with the teeth 5a of the rack 5. This detent 6
3 is rotatably attached to the inner arm 2 as shown in FIG. 3, and the claw portion 6a is pressed toward the rack 5 by a spring 9 from the front end 2a side of the inner arm 2. . Further, on the front end 2a side of the inner arm 2, there is provided a locking member 4 having a locking portion 4a which is provided with an elongated hole 7 and which comes into contact with a contact member 8 of the outer arm 1 so that the locking portion 4a can come and go from the elongated hole 7. It is rotatably mounted. Further, the locking body 4 has a holding body 10 of the locking body 4, an elongated hole 12 for slidably supporting a support shaft 11 of the locking body 4, and a telescopic support of the holding body 10 of the locking body 4. There is provided a buffering mechanism 14 composed of a spring 13 which is pulled and urged in the contracting direction of the arm.

Next, the operating state of the telescopic support arm according to the invention of the present application configured as described above will be described. The telescopic support arm according to the invention of this application is used on both sides of the door 15 as shown in FIG. 4, for example, and one end of the telescopic support arm is attached to both sides of the door 15 to support the telescopic support. Door 1 at the other end of each arm
5 is attached to the supporting frame 16. In this figure, the position where the door 15 is fully opened (the position where the telescopic support arm is most extended).
At the end of the long hole 3 of the outer arm 1, the inner arm 2
2 shows a state in which the locking portion 4a of the locking body 4 is locked.

When the telescopic support arm extends from the contracted state, the detent 6 indicated by a solid line in FIG.
5, and the detent 6 is tilted from the raised state, and in this tilted state, the teeth 5a of the rack 5 are engaged with the claw 6a of the detent 6 as shown by a virtual line in FIG.
Moves intermittently in small increments. At this time, in the direction in which the telescopic support arm is contracted, the rack 5 is held in a state where the teeth 5a of the rack 5 and the claw 6a of the detent 6 remain engaged.
Is stopped by the detent 6, so that the door 15 can be stopped and placed at an arbitrary position. When the telescopic support arm is extended most, the claw 6a of the detent 6 exceeds the tooth 5a of the rack 5 as shown by the solid line in FIG. The engagement is released. Then, the detent 6 returns to the original state by the spring 9.

When the telescopic support arm is contracted from the extended state, as shown by the phantom line in FIG.
The claw 6a of the rack 5 moves along the teeth 5a of the rack 5 so that the claw 6a of the detent 6 and the teeth 5a of the rack 5 are smoothly engaged without contracting the telescopic support arm. When the telescopic support arm is minimized, the detent 6a of the detent 6 goes over the tooth 5a of the rack 5, and the detent 6 is moved by the spring 9 to the original position as shown by the solid line in FIG. Return to awake state.

FIG. 7 shows a state before the locking portion 4a of the locking body 4 of the inner arm 2 is locked to the end of the elongated hole 3 of the outer arm 1, and the telescopic support arm is extended. As a result, the locking member 4 of the inner arm 2 is
The outer arm 1 is rotated by contact with
(See FIG. 8). When the telescopic support arm is reduced, the state in which the locking portion 4a of the locking body 4 of the inner arm 2 is locked to the end of the elongated hole 3 of the outer arm 1 (shown in FIG. 9). Become.

Next, when the telescopic support arm is extended from this state, as shown in FIG. 10, the locking portion 4a of the locking body 4 of the inner arm 2 and the end of the elongated hole 3 of the outer arm 1 Is released, the locking body 4 comes into contact with the abutting body 8 again, and the locking portion 4a of the locking body 4 rotates to reach an angle where the locking is not performed at the end of the elongated hole 3 of the outer arm 1. . Then, when the telescopic support arm is reduced from this state, as shown in FIG. 11, the locking member 4 of the inner arm 2 becomes the elongated hole 3 of the outer arm 1.
The arm rotates around the end and is inserted into the outer arm 1.

In FIG. 8, when the door 15 is vigorously opened and the telescopic support arm is fully extended,
As shown in FIG. 12, in a state where the locking member 4 is in contact with the contact member 8, the spring 13 is moved by the amount that the locking member 4 moves through the elongated hole 12.
The telescopic support arm can be extended while receiving a buffering action. Also, the door 15 is the support frame 1
6 is distortedly attached to the support frame 6, or if the door 15 is loosely attached to the support frame 16, the spring 13 is extended by the amount that the locking member 4 of the one telescopic support arm moves through the elongated hole 12. Since the telescopic support arm can be further extended while receiving the buffering action, both telescopic support arms can be extended until the locking member 4 is completely brought into contact with the contact member 8.

[0020]

The telescopic support arm according to the invention of the present application is constructed as described above, so that even when the door is swiftly opened and the telescopic support arm is fully extended, the shock is buffered. Therefore, the durability becomes excellent. Also, when the telescopic support arms are used on both sides of the door, even if the door is distorted or the door is loosely attached to the support frame, both of the telescopic support arms are used. Since the locking body can be extended until it completely comes into contact with the contact body, the opening and closing operation of the door becomes smooth. Furthermore, regardless of the position where the door is fully opened or the position where the opening width of the door is set in advance, the door can be stopped and placed at an arbitrary position, so it is desirable to stop and place the door at a slightly open position This is very convenient for use in cases or when the opening width of the door is frequently changed.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a telescopic support arm according to the invention of this application.

FIG. 2 is a partially cutaway perspective view of an outer arm.

FIG. 3 is a partially cutaway perspective view of an inner arm.

FIG. 4 is a perspective view showing a use state of a telescopic support arm according to the invention of this application.

FIG. 5 is an explanatory view showing a state in which a detent for intermittently moving a tooth portion of a rack in small increments;

FIG. 6 is an explanatory diagram illustrating a state in which the back side of the detent claw moves along the teeth of the rack;

FIG. 7 is an explanatory view showing a state before the locking portion of the locking body of the inner arm is locked to the end of the elongated hole of the outer arm.

FIG. 8 is an explanatory view showing a state in which the locking body of the inner arm slightly appears from the elongated hole of the outer arm.

FIG. 9 is an explanatory view showing a state in which the locking portion of the locking body of the inner arm is locked to the end of the elongated hole of the outer arm.

FIG. 10 is an explanatory view showing a state in which the locking portion of the locking body is turned to an angle at which the locking portion does not lock to the end of the long hole of the outer arm.

FIG. 11 is an explanatory diagram showing a state in which the locking body of the inner arm is being inserted into the outer arm.

FIG. 12 is an explanatory view showing a state in which the telescopic support arm is extended while receiving a buffering action in a state where the locking body is in contact with the contact body.

FIG. 13 is a perspective view showing a positional relationship between a locking body, an abutting body, and an end of a long hole of an outer arm shown in FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Outer arm 1a ... Front end 1b ... Rear end 2 ... Inner arm 2a ... Front end 2b ... Rear end 3 ... Elongated hole 4 ... Locking body 4a ... Locking part 5 ... Rack 5a ... Tooth part 6 ... Detent 6a ... Claw Part 7… Long hole 8… Contact body 10… Holder 11… Spin shaft 12… Long hole 13… Spring 14… Buffer mechanism

Claims (2)

(57) [Claims] 1. A rear end 2b of an inner arm 2 is inserted from a front end 1a of an outer arm 1 so as to be slidable, and an elongated hole 3 is provided on a rear end 1b side of the outer arm 1;
The contact body 8 is provided inside the b side, the long hole 7 is provided on the front end 2a side of the inner arm 2, and the holding body 10 of the locking body 4 is provided inside the front end 2a side with the telescopic support arm. The holding body 10 is provided with an elongated hole 12 extending in the front-rear direction in the holding body 10, and the support shaft 11 of the locking body 4 is supported by the elongated hole 12. The locking member 4 is attached to the holding member 10 so as to be rotatable and movable in the front-rear direction.
Is rotated by contact with the contact body 8, and the locking portion 4
A telescopic support arm, wherein a is movable out of the elongated holes 3 and 7. 2. A rear end 2b of the inner arm 2 is inserted from a front end 1a of the outer arm 1 so as to be slidable, and an elongated hole 3 is provided on the rear end 1b side of the outer arm 1;
The contact body 8 is provided inside the b side, the long hole 7 is provided on the front end 2a side of the inner arm 2, and the holding body 10 of the locking body 4 is provided inside the front end 2a side with the telescopic support arm. The holding body 10 is provided with an elongated hole 12 extending in the front-rear direction in the holding body 10, and the support shaft 11 of the locking body 4 is supported by the elongated hole 12. The locking member 4 is attached to the holding member 10 so as to be rotatable and movable in the front-rear direction.
Is rotated by contact with the contact body 8, and the locking portion 4
a is made to be able to come and go from the long holes 3 and the long holes 7, and further, the tooth portions 5 of the rack 5 arranged on the outer arm 1 along the longitudinal direction.
a telescopic support arm, wherein a claw portion 6a of a detent 6 attached to the front end 2a side of the inner arm 2 is pressed into the rack 5 so as to be pressed toward the rack 5.