JPH0627023U - Coil spring compression device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] It is possible to compress various types of coil springs with different free lengths, wire diameters, and spring pitches without tuning, and to improve work efficiency. A compression device is provided. A coil spring compression cylinder 5 is installed in the vicinity of a clamp device 4 for a work W to which a coil spring S is assembled, and a pinion 7 is rotatably provided at the tip of an operating rod 6 that moves up and down. The two guide rods 9a and 9b are arranged, and the rack 11 is attached to the pinion 7.
a pair of movable bases 10a and 10 meshed with each other via a and 11b.
Guide slidably. A push plate 14 that abuts the upper end surface of the coil spring S on the moving bases 10a and 10b.
Attach a and 14b so that they can be floated. The pair of arms 12a, 12b is provided with a pinion rotation preventing means 8 that restrains the rotation of the pinion 7 until it descends to the coil spring compression start position and closes.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for compressing a coil spring when mounting the coil spring on a work.

[0002]

[Prior art]

 Coil springs are mounted in compression on oil dampers of automobile suspensions. As a jig for compressing the coil spring, as shown in FIG. 6, a horseshoe-shaped pushing plate is fixed to the end of the operating rod 51 which is moved up and down by the cylinder 50, and the coil spring is attached to a plurality of places of the pushing plate 51. It has a structure in which the locking claws 53 are provided.

[0003]

[Problems to be solved by the device]

 In the above-described conventional coil spring compression jig, since the locking claws 53 provided at the plurality of positions on the pushing plate 51 are provided so as to correspond to the target coil spring, the free length of the coil spring and the wire If the diameter or spring pitch changes, it is necessary to tune the locking claws to accommodate them. Tuning this locking claw requires a lot of man-hours, and the suspension of a car may be changed several times before the start of a new car, and it takes a lot of work to cope with this. .

An object of the present invention is to provide a coil spring compression device that solves the above-mentioned conventional problems.

[0005]

[Means for Solving the Problems]

 The gist of the present invention for achieving the above object is to provide a work clamp device for fixing a work to which a coil spring is assembled in a fixed position, a coil spring compression cylinder installed in the vicinity of the work clamp device, and a tip. An operating rod that rotatably supports a pinion and moves up and down by the coil spring compression cylinder, and two guides that are located in the center of the operating rod and are arranged on the left and right with an axis parallel to the operating rod. A rod, a pair of movable bases slidably guided by the two guide rods in the axial direction, and meshed with the pinion via a rack; and a pair of movable bases opened and closed around the axis of the guide rods. A pair of arms that can be swung open / closed by a work cylinder, and a pair of arms that are floatably attached to the pair of arms. It has a locking claw on the ring and can be engaged with and disengaged from the pushing plate that comes into contact with the upper end surface of the coil spring and the teeth of the pinion, until the pair of arms descends to the coil spring compression start position and closes. And a pinion rotation preventing means for restraining rotation of the pinion.

[0006]

[Action]

 According to the present invention having the above-described structure, the coil spring is set on the work clamped at the fixed position, the start button is turned on, and the operating rod is lowered by the coil spring compression cylinder. At this time, since the rotation of the pinion is restricted by the pinion rotation preventing means, the pair of left and right actuating tables simultaneously move down via the rack meshing with the pinion. When the operating table descends to the compression start position of the coil spring, the arm closes, and the pinion rotation prevention means releases the pinion rotation restraint to bring the pinion into a free rotation state. In this state, the operating table continues to descend, and one of the left and right pushing plates abuts on the upper end surface of the coil spring, and the locking claw locks the coil spring to stop the descending motion. Next, the other operating table follows the pinion and the rack and moves downward, the pushing plate comes into contact with the upper end surface of the coil spring, and the locking claw locks with the coil spring. It is moved down and down, and the pushing plate compresses the coil spring to a predetermined position.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a base fixed on the floor, and 2 is a work holding base provided on the base 1. The work holding table 2 can be vertically adjusted with respect to the base table 1 by an adjusting shaft 3 in accordance with the size of the work W.

Reference numeral 4 denotes a work clamp device, which is composed of a work gripping cylinder 4 a and a gripping claw 4 b that is opened and closed by the work gripping cylinder 4 a, and clamps a work W placed on the work holding table 2. Also unclamp.

A coil spring compression cylinder 5 is installed in the vertical axis direction in the vicinity of the work holder 2 and the work clamp device 4. This coil spring compression cylinder 5 moves the operating rod 6 extending upward on a coaxial line up and down.

A pinion 7 is rotatably supported on the upper end of the operating rod 6. Reference numeral 8 is a pinion rotation preventing means for restraining the rotation of the pinion 7 until the operating rod 6 reaches a predetermined lowered position, and a pin 8a engaged with a tooth of the pinion 7 and an actuator for moving the pin 8a forward and backward. And 8b.

Two guide rods 9 a and 9 b are arranged on the left and right sides of the operating rod 6 in the center and on an axis parallel to the operating rod 6. Moving bases 10a and 10b are slidably guided in the axial direction by the two guide rods 9a and 9b, and mesh with the pinion 7 via racks 11a and 11b.

Arms 12a and 12b are provided on the pair of movable bases 10a and 10b so as to be pivotable around the axes of the guide rods 9a and 9b by open / close cylinders 13a and 13b. The pair of arms 12a, 12b have locking claws 16a, 16b for the coil spring S, and the push plates 14a, 14b contacting the upper end surface of the coil spring S are supported by the support shafts 15a, 15b and the springs. Floating is possible.

Reference numeral 17 is a dog fixedly mounted on the moving table 10b. The dog 17 operates by contacting a limit switch LS1 for confirming the rising end of the movable table 10b, a limit switch LS2 for confirming the compression start point of the coil spring, and a limit switch LS3 for confirming the descending end.

The operation of the above configuration will be described. The original positions of the movable tables 10a and 10b are the rising end positions as shown in FIG. At the original position of the movable bases 10a and 10b, the pin 8a of the pinion rotation preventing means 8 engages with the teeth of the pinion 7 to restrain the rotation of the pinion 7. Further, the arms 12a and 12b are pivotally positioned in a state of being opened in the left-right direction as shown in FIG.

The work W on which the coil spring S is set is placed on the work holding table 2 in the above-mentioned original position and clamped by the work clamp device 4. Next, the start button is turned on to operate the coil spring compression cylinder 5 to lower the operating rod 6. At this time, since the rotation of the pinion 7 is restricted by the pinion rotation preventing means 8, the pair of left and right actuating tables 10a, 10b simultaneously descend via the racks 11a, 11b meshing with the pinion 7.

When the operating bases 10a and 10b move down to the compression start position of the coil spring, the dog 17 operates the limit switch LS2, and the open / close cylinders 13a and 13b operate in response to the confirmation signal, so that the opening / closing cylinders 13a and 13b are activated. As shown by, while the arms 12a and 12b are closed, the pinion rotation preventing means 8 releases the rotation constraint of the pinion to bring the pinion into a freely rotating state.

In this state, the operating tables 10a and 10b continue to move downward, and as shown in FIG. 5, for example, the left pushing plate 14a comes into contact with the upper end surface of the coil spring S, and the locking claws 16a. Locks on the coil spring S and stops the downward movement. Next, the operating table 10a on the right side follows the pinion 7 and the rack 11b to move downward, the pushing plate 14b contacts the upper end surface of the coil spring S, and the locking claw 16b locks the coil spring S. After that, both the left and right actuating tables 10a, 10b simultaneously move down to compress the coil spring S to a predetermined position by the pushing plates 14a, 14b. When the coil spring S is compressed to a predetermined position, the dog 17 operates the limit switch LS3 to detect the completion of compression.

After that, the upper seat is set on the coil spring S, the nuts are tightened, and then the operating tables 10a and 10b are raised, stopped at arbitrary rising positions, and the arms 12a and 12b are opened to open the original sheets. Return to position, complete coil spring compression cycle, wait for next cycle.

[0019]

[Effect of device]

 As described above, according to the present invention, a work clamp device that fixes a work to which a coil spring is assembled in a fixed position, a coil spring compression cylinder that is installed in the vicinity of the work clamp device, and a pinion that can be rotated at a tip end thereof can be rotated. An actuating rod that is pivotally supported and moves up and down by a coil spring compression cylinder, two guide rods that are located in the center of the actuating rod and are arranged on the left and right in an axis parallel to the actuating rod, and the two actuating rods. And a pair of movable bases that are slidably guided in the axial direction by the guide rods and meshed with the pinion via a rack, and a pair of movable bases are swung around the guide rod axis by an opening / closing cylinder. A pair of arms that can be installed and a pair of arms that can be floated on the pair of arms to lock the coil springs. And a push plate that contacts the upper end surface of the coil spring and can be engaged with and disengaged from the teeth of the pinion.The pair of arms keeps rotating the pinion until it descends to the coil spring compression start position and closes. Since it is equipped with a pinion rotation prevention device that restrains the coil spring, it is possible to compress the coil spring without tuning for many types of coil springs with different free lengths, wire diameters, and spring pitches. improves. In addition, since the rack and the pinion absorb the difference in compression between the left and right pushing plates, there is an advantage that uniform compression can be applied to the left and right sides.

[Brief description of drawings]

FIG. 1 is an overall front view of the device of the present invention.

FIG. 2 is a plan view of an opening state of an arm and a pushing plate.

FIG. 3 is a front view of the state in which the arm and the pushing plate are closed.

FIG. 4 is a plan view of FIG.

FIG. 5 is a front view of a state where one pushing plate abuts on an upper end of a coil spring and the other pushing plate follows and descends.

FIG. 6 is a perspective view of a conventional coil spring compression jig.

[Explanation of symbols]

 1 base 2 work holding table 4 work clamp device 5 coil spring compression cylinder 6 operating rod 7 pinion 8 pinion rotation preventing means 9a guide rod 9b guide rod 10a moving table 10b moving table 11a rack 11b rack 12a arm 12b arm 14a pushing Plate 14b Pushing plate 16a Locking claw 16b Locking claw S Coil spring

Claims (1)

[Scope of utility model registration request] 1. A work clamp device for fixing a work to which a coil spring is assembled in a fixed position, a coil spring compression cylinder installed in the vicinity of the work clamp device, and a pinion rotatably pivotally supported at a tip of the work clamp device. An actuating rod that moves up and down by a coil spring compression cylinder, two guide rods that are located in the center of the actuating rod and that are arranged on the left and right in parallel with the actuating rod, and the two guide rods have an axis line. A pair of movable bases slidably guided in a direction and meshed with the pinion via a rack, and a pair of movable bases provided on the pair of movable bases so as to be pivotable around an axis of the guide rod by an opening / closing cylinder. An arm, and is attached to the pair of arms so as to be capable of floating,
A pushing plate that has a locking claw for the coil spring and is in contact with the upper end surface of the coil spring, and can be engaged with and disengaged from the teeth of the pinion. A pinion rotation preventing means for restraining the rotation of the pinion, and a compression device for a coil spring.