How to move a Collider in a Game Object in a Direction

Hello I wanted to know if it was possible to move a collider that's in a game object a certain direction. In this case up and then come back down. This is to make up for the animation I have made for a character that has a jumping animation and it never crossed my mind that the collision would stay the same place making avoiding things with jump pointless. I tried doing a getcomponent and sendmessageupwards command but I couldn't figure out the proper way to do it. If I could get some adive or help that would be amazing.

Here is the code and script I intend on implementing in:

 using UnityEngine;
 using System.Collections;
 
 public class PlayerMovement : MonoBehaviour 
 {
 
     public float movementSpeed = 10.0f;
     public float angleChangeSpeed = 100.0f;
 
     public bool isDead = false;
     
     private float minX = -15.0f;
     private float maxX = 15.0f;
     private float minZ = 0.0f;
     private float maxZ = 20.0f;
 
     // Update is called once per frame
     void Update () 
     {
         if(!isDead)
         {
             transform.localPosition = new Vector3(Mathf.Clamp(transform.localPosition.x, minX, maxX), 0, 
                                              Mathf.Clamp(transform.localPosition.z, minZ, maxZ));
             // new code
             float horizontal = Input.GetAxis ("Horizontal");
             float vertical = Input.GetAxis ("Vertical");
 
             Vector3 direction = new Vector3 (horizontal, 0, vertical);
             Vector3 finalDirection = new Vector3 (horizontal, 0, 1.0f);
 
 
             transform.position += direction * movementSpeed * Time.deltaTime;
 
             transform.rotation = Quaternion.RotateTowards (transform.rotation, Quaternion.LookRotation (finalDirection), Mathf.Deg2Rad*angleChangeSpeed);
         }
 
         if (!isDead) 
         {
             if (Input.GetButton ("Jump"))
             {
                 //////////////RIGHT HERE////////////////////////////////////
             }
         }
     }
 
     void SetDead(bool dead)
     {
         Debug.Log ("SetDead was reached");
         isDead = dead;
     }
 }