JP3081321U - Spring unit - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a mainspring unit capable of adjusting the power of a mainspring in a single operation. A mainspring reel 3 on which a rope 2 is wound is rotatably held on a frame 1, and an adjustment shaft 4, which fixes an inner end of the mainspring in the mainspring reel 3, is provided with a stop member 5 fixed thereto. The stop member 5 is provided with a locking projection 50, and in the vicinity of the stop member 5, there is provided a contact member 6 having a key 60 that engages with the locking projection 50. Is provided with a driver insertion portion 40 so that the adjustment shaft 4 can be rotated forward or backward by a tool such as a screwdriver.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a mainspring unit used for a closer of a sliding door. More specifically, the invention relates to a mainspring unit having an adjusting device that can easily adjust the power of the mainspring.

[0002]

[Prior art]

 Conventionally, as a mainspring unit of this type, a mainspring inner end fixed shaft is pushed in and turned, and when it is released, the mainspring is locked and prevented from rotating (Japanese Patent Publication No. 56-50138), and a mainspring inner end. It is known that a plate meshed with a fixed shaft is pushed in to disengage the mesh, and when the hand is released, the plate is restored by a spring and the rotation is again prevented by the plate (Japanese Patent Application Laid-Open No. 7-259424). In each case, a single push-in operation can make a fraction of a turn, making it a safe and reliable adjustment method.

[0003]

[Problems to be solved by the invention]

 All of the above-mentioned conventional spring units disengage with a pushing operation, so if the main shaft fixed to the mainspring is rotated many times in one operation, the number of repetitions is too much and the operation time is too long. There was a problem. In particular, when the mainspring unit is first installed, it is necessary to prewind the mainspring, and at this time, it is necessary to rotate the inner end fixed shaft of the mainspring several times, which is troublesome and time-consuming.

[0004] The present invention has been made in view of the above-mentioned problems of the above-described conventional technology, and an object of the present invention is to make it possible to easily rotate the inner end fixed shaft of the mainspring several times. Another object of the present invention is to provide a mainspring unit that can be pre-wound without additional time when the mainspring unit is assembled.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in the mainspring unit of the present invention, a mainspring reel on which a rope is wound is held rotatably on a frame, and an adjustment shaft is attached to an inner end of the mainspring in the mainspring reel. The member is fixed, and a contact member is provided in the vicinity of the stop member so as to be capable of contacting and detaching, and is held by the frame. The gap between the contact member and the stop member is pryed with a tool (driver) to thereby form a spring. Utilizing the reverse rotation, the hook between the contact member and the stop member can be transferred frame by frame. (Claim 1)

Further, the stop member has an uneven cam plate shape, and the contact member that comes into contact with the stop member is an elastic deformable body. (Claim 2)

The stop member is made of an elastically deformable body, and the contact member that comes into contact with the stop member is formed into a concave-convex cam plate shape. (Claim 3)

Further, the stop member has an asymmetric shape in which the unevenness of the stop member has a rotation direction, is easy to slide in the forward direction, and catches only in the reverse direction. (Claim 4)

[0009]

【Example】

 Embodiments will be described with reference to the drawings. 1 to 3, an adjustment shaft 4 for fixing an inner end of a mainspring in a mainspring reel 3 around which a rope 2 is wound around a frame 1 is provided, and a driver insertion portion 40 is formed on the adjustment shaft 4. I have. The driver insertion portion may be a minus slot as shown, but may be a plus slot, a hexagonal hole or a hexagonal head. The stop member 5 is fixed to the vicinity of the driver insertion portion 40 of the adjustment shaft 4 and forms several locking projections 50. An abutment member 6 is provided on the frame 1 side so as to abut the locking projection 50. The abutment member 6 is made of an elastically deformable body such as a thick wire spring, and a key (hook) 60 is formed at the tip. I have. The contact member 6 is elastically deformed so that the key 60 can be disengaged from the engaging projection 50 of the stop member 5, and is held on the frame 1 by a cover 62 or the like. The cover 62 prevents the contact member 6 from dancing.

In the mainspring unit having the above structure, as shown in FIG. 2, the engagement between the locking projection 50 of the stop member 5 and the key 60 of the contact member 6 is released by using a minus driver 7. Re-lock at the next engagement. Since the locking projections 50 in FIG. 2 are provided at six locations at equal intervals, the stop member 5 rotates 1/6 when one engagement is released. This operation is repeated to gradually reduce the spring force.

FIG. 3 shows an operation for gradually increasing the mainspring force. The flathead screwdriver 7 is inserted into the driver insertion portion 40 of the adjustment shaft 4 and is turned in the white arrow direction. The stop member 5 can be stopped at a desired position because the engaging projection 50 engages with the key 60 of the contact member 6 every 1/6 rotation. At the time of pre-winding, the adjustment shaft 4 is rotated several times.

FIG. 4 shows another example of the design of the contact member 6. (A) is a design example in which four contact members 6 are provided vertically, horizontally, and stopped at 90 ° each.

FIG. 2B is a design example in which the keys 60 of the contact member 6 are provided at two places on the left and right sides and stop at 180 °.

FIG. 3C shows a design example in which the key of the contact member 6 is eliminated, and the tip of the contact member 6 is brought into contact with the latching projection 50.

(D) is a design example in which two keys 60 of the contact member 6 are swung like a pendulum to alternately engage with the stop member 5.

FIG. 4E shows a single abutment member 6 provided with the two keys 60 asymmetrically, which are alternately engaged with the stop member 5.

FIG. 3F shows a state in which the contact member 6 shown in FIGS. 1 to 3 is attached in the opposite direction, and is pushed to stop.

FIG. 5 and FIG. 6 show another design example of the stop member 5. That is, the hooking projection 50 of the stop member 5 does not necessarily have to have a claw shape, and may be a rounded projection as shown in FIG. Further, instead of a disk shape, a stop member 5 having a linear spring shape as shown in FIG. 6 may be formed. At this time, the contact member 6 meshing with the stop member 5 is made of a plate-like material having a key portion 60. Although the drawing has four hooking projections 50, six hooking projections 50 may be provided.

The engaging projection and the recess may be reversed. For example, the latching projection 50 in FIG. 5 may be a latching recess, and the key portion 60 may have a projection shape that meshes with the latching recess. . Similarly, in FIG. 6 as well, the latching projection 50 may be a latching recess, and the key portion 60 may be formed in a projection shape that meshes with the latching recess.

[0020]

[Effect of the invention]

 Since the present invention is configured as described above, the following effects can be obtained.

In the mainspring unit of the first aspect, the frame is provided with an adjusting shaft that rotatably holds a mainspring reel wound with a rope, and that holds an inner end of the mainspring in the mainspring reel. An abutment member is provided in the vicinity of the stop member so as to be able to contact and detach from the stop member.The gap between the abutment member and the stop member is pryed with a tool, and the abutment member and the stop member are hooked using the reverse rotation of the mainspring. Is transferred one frame at a time, so that the contact member can be temporarily removed from the stop member using a flathead screwdriver or the like, and adjusted to the direction in which the spring is weakened by the rewinding force of the spring. Also, by rotating the adjustment shaft in the opposite direction, the stop member can be clicked against the contact member to safely increase the strength of the mainspring. It can be an integer.

According to the second aspect of the present invention, since the stop member is formed into an uneven cam plate shape and the contact member is formed into an elastically deformable body, the contact member is elastically deformed by a flathead screwdriver or the like to make contact with the concave-convex cam plate shape. Since it is possible to re-engage with the next unevenness using the elastic restoring force, no special mechanism is required, and the operation is simple and reliable.

According to the third aspect of the present invention, since the stop member is made of an elastically deformable body and the contact member is formed in the shape of a concave / convex cam plate, the adjusting shaft is rotated so that the stop member and the contact member engage with each other. Can be passed one after another and retained at any meshing point.

According to the fourth aspect of the present invention, the unevenness of the stop member has a rotational direction, is easy to slide in the forward direction, and is formed in an asymmetric shape that is hooked only in the reverse direction. It can be turned easily and cannot be turned easily in the opposite direction, which weakens the mainspring force. If the hook cannot be turned at all, the hook can be safely removed one by one with a screwdriver, as shown in the above embodiment (FIG. 1).

[Brief description of the drawings]

FIG. 1 shows a perspective view of the present invention.

FIG. 2 is a front view showing a use state of FIG. 1;

FIG. 3 is a front view showing a use state of FIG. 1;

FIG. 4 is a front view showing another design example.

FIG. 5 is a front view showing another embodiment.

FIG. 6 is a front view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Frame 2 ... Rope 3 ... Spring reel 4 ... Adjusting shaft 5 ... Stop member 6 ... Patch member 40 ... Driver insertion part 50 ... Hook protrusion 60 ... Key part

Claims (4)

[Utility model registration claims] 1. A mainspring reel having a rope wound thereon is rotatably held on a frame, an adjusting shaft for fixing an inner end of the mainspring in the mainspring is provided, and a stop member is fixed to the adjusting shaft. In the vicinity, a contact member is provided so as to be capable of contacting and detaching, and is held by the frame. The gap between the contact member and the stop member is pryed with a tool (driver) to use the reverse rotation of the mainspring. The mainspring unit is designed to be able to transfer the hook between the unit and the stop member frame by frame. 2. The mainspring unit according to claim 1, wherein the stop member has an uneven cam plate shape, and the contact member that comes into contact with the stop member is an elastic deformation body. 3. The mainspring unit according to claim 1, wherein the stop member is formed of an elastically deformable body, and the contact member that comes into contact with the stop member is formed in an uneven cam plate shape. 4. The mainspring unit according to claim 2, wherein the projections and depressions of the stop member have an asymmetric shape that has a rotation direction, is easy to slide in a forward direction, and is hooked only in a reverse direction.